/* libFLAC - Free Lossless Audio Codec library
- * Copyright (C) 2000,2001,2002,2003 Josh Coalson
+ * Copyright (C) 2000,2001,2002,2003,2004,2005,2006 Josh Coalson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#if defined _MSC_VER || defined __MINGW32__
+#include <io.h> /* for _setmode() */
+#include <fcntl.h> /* for _O_BINARY */
+#endif
+#if defined __CYGWIN__ || defined __EMX__
+#include <io.h> /* for setmode(), O_BINARY */
+#include <fcntl.h> /* for _O_BINARY */
+#endif
#include <stdio.h>
#include <stdlib.h> /* for malloc() */
#include <string.h> /* for memset/memcpy() */
+#include <sys/stat.h> /* for stat() */
+#include <sys/types.h> /* for off_t */
+#if defined _MSC_VER || defined __MINGW32__
+#if _MSC_VER <= 1200 /* @@@ [2G limit] */
+#define fseeko fseek
+#define ftello ftell
+#endif
+#endif
#include "FLAC/assert.h"
#include "protected/stream_decoder.h"
#include "private/bitbuffer.h"
#include "private/fixed.h"
#include "private/format.h"
#include "private/lpc.h"
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
+#include "private/md5.h"
+#include "private/memory.h"
#ifdef max
#undef max
#endif
#define max(a,b) ((a)>(b)?(a):(b))
+/* adjust for compilers that can't understand using LLU suffix for uint64_t literals */
+#ifdef _MSC_VER
+#define FLAC__U64L(x) x
+#else
+#define FLAC__U64L(x) x##LLU
+#endif
+
/***********************************************************************
*
* Private static data
***********************************************************************/
static void set_defaults_(FLAC__StreamDecoder *decoder);
+static FILE *get_binary_stdin_();
static FLAC__bool allocate_output_(FLAC__StreamDecoder *decoder, unsigned size, unsigned channels);
static FLAC__bool has_id_filtered_(FLAC__StreamDecoder *decoder, FLAC__byte *id);
static FLAC__bool find_metadata_(FLAC__StreamDecoder *decoder);
static FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length);
static FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj);
static FLAC__bool read_metadata_cuesheet_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_CueSheet *obj);
+static FLAC__bool read_metadata_picture_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_Picture *obj);
static FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder);
static FLAC__bool frame_sync_(FLAC__StreamDecoder *decoder);
-static FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame);
+static FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame, FLAC__bool do_full_decode);
static FLAC__bool read_frame_header_(FLAC__StreamDecoder *decoder);
-static FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps);
-static FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps);
-static FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order);
-static FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order);
-static FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps);
+static FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
+static FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
+static FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode);
+static FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode);
+static FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
static FLAC__bool read_residual_partitioned_rice_(FLAC__StreamDecoder *decoder, unsigned predictor_order, unsigned partition_order, FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, FLAC__int32 *residual);
static FLAC__bool read_zero_padding_(FLAC__StreamDecoder *decoder);
static FLAC__bool read_callback_(FLAC__byte buffer[], unsigned *bytes, void *client_data);
+static FLAC__StreamDecoderWriteStatus write_audio_frame_to_client_(FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[]);
+static void send_error_to_client_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status);
+static FLAC__bool seek_to_absolute_sample_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample);
+static FLAC__StreamDecoderReadStatus file_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data);
+static FLAC__StreamDecoderSeekStatus file_seek_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data);
+static FLAC__StreamDecoderTellStatus file_tell_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
+static FLAC__StreamDecoderLengthStatus file_length_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data);
+static FLAC__bool file_eof_callback_(const FLAC__StreamDecoder *decoder, void *client_data);
/***********************************************************************
*
typedef struct FLAC__StreamDecoderPrivate {
FLAC__StreamDecoderReadCallback read_callback;
+ FLAC__StreamDecoderSeekCallback seek_callback;
+ FLAC__StreamDecoderTellCallback tell_callback;
+ FLAC__StreamDecoderLengthCallback length_callback;
+ FLAC__StreamDecoderEofCallback eof_callback;
FLAC__StreamDecoderWriteCallback write_callback;
FLAC__StreamDecoderMetadataCallback metadata_callback;
FLAC__StreamDecoderErrorCallback error_callback;
+ /* generic 32-bit datapath: */
void (*local_lpc_restore_signal)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]);
+ /* generic 64-bit datapath: */
void (*local_lpc_restore_signal_64bit)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]);
+ /* for use when the signal is <= 16 bits-per-sample, or <= 15 bits-per-sample on a side channel (which requires 1 extra bit): */
void (*local_lpc_restore_signal_16bit)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]);
+ /* for use when the signal is <= 16 bits-per-sample, or <= 15 bits-per-sample on a side channel (which requires 1 extra bit), AND order <= 8: */
+ void (*local_lpc_restore_signal_16bit_order8)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]);
void *client_data;
+ FILE *file; /* only used if FLAC__stream_decoder_init_file()/FLAC__stream_decoder_init_file() called, else NULL */
FLAC__BitBuffer *input;
FLAC__int32 *output[FLAC__MAX_CHANNELS];
- FLAC__int32 *residual[FLAC__MAX_CHANNELS];
+ FLAC__int32 *residual[FLAC__MAX_CHANNELS]; /* WATCHOUT: these are the aligned pointers; the real pointers that should be free()'d are residual_unaligned[] below */
FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents[FLAC__MAX_CHANNELS];
unsigned output_capacity, output_channels;
FLAC__uint32 last_frame_number;
+ FLAC__uint32 last_block_size;
FLAC__uint64 samples_decoded;
FLAC__bool has_stream_info, has_seek_table;
FLAC__StreamMetadata stream_info;
FLAC__CPUInfo cpuinfo;
FLAC__byte header_warmup[2]; /* contains the sync code and reserved bits */
FLAC__byte lookahead; /* temp storage when we need to look ahead one byte in the stream */
+ /* unaligned (original) pointers to allocated data */
+ FLAC__int32 *residual_unaligned[FLAC__MAX_CHANNELS];
+ FLAC__bool do_md5_checking; /* initially gets protected_->md5_checking but is turned off after a seek or if the metadata has a zero MD5 */
+ FLAC__bool internal_reset_hack; /* used only during init() so we can call reset to set up the decoder without rewinding the input */
+ FLAC__bool is_seeking;
+ struct FLAC__MD5Context md5context;
+ FLAC__byte computed_md5sum[16]; /* this is the sum we computed from the decoded data */
+ /* (the rest of these are only used for seeking) */
+ FLAC__Frame last_frame; /* holds the info of the last frame we seeked to */
+ FLAC__uint64 first_frame_offset; /* hint to the seek routine of where in the stream the first audio frame starts */
+ FLAC__uint64 target_sample;
+ unsigned unparseable_frame_count; /* used to tell whether we're decoding a future version of FLAC or just got a bad sync */
} FLAC__StreamDecoderPrivate;
/***********************************************************************
"FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC",
"FLAC__STREAM_DECODER_READ_FRAME",
"FLAC__STREAM_DECODER_END_OF_STREAM",
+ "FLAC__STREAM_DECODER_SEEK_ERROR",
"FLAC__STREAM_DECODER_ABORTED",
- "FLAC__STREAM_DECODER_UNPARSEABLE_STREAM",
"FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR",
- "FLAC__STREAM_DECODER_ALREADY_INITIALIZED",
- "FLAC__STREAM_DECODER_INVALID_CALLBACK",
"FLAC__STREAM_DECODER_UNINITIALIZED"
};
+FLAC_API const char * const FLAC__StreamDecoderInitStatusString[] = {
+ "FLAC__STREAM_DECODER_INIT_STATUS_OK",
+ "FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS",
+ "FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR",
+ "FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE",
+ "FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED"
+};
+
FLAC_API const char * const FLAC__StreamDecoderReadStatusString[] = {
"FLAC__STREAM_DECODER_READ_STATUS_CONTINUE",
"FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM",
"FLAC__STREAM_DECODER_READ_STATUS_ABORT"
};
+FLAC_API const char * const FLAC__StreamDecoderSeekStatusString[] = {
+ "FLAC__STREAM_DECODER_SEEK_STATUS_OK",
+ "FLAC__STREAM_DECODER_SEEK_STATUS_ERROR",
+ "FLAC__STREAM_DECODER_SEEK_STATUS_UNSUPPORTED"
+};
+
+FLAC_API const char * const FLAC__StreamDecoderTellStatusString[] = {
+ "FLAC__STREAM_DECODER_TELL_STATUS_OK",
+ "FLAC__STREAM_DECODER_TELL_STATUS_ERROR",
+ "FLAC__STREAM_DECODER_TELL_STATUS_UNSUPPORTED"
+};
+
+FLAC_API const char * const FLAC__StreamDecoderLengthStatusString[] = {
+ "FLAC__STREAM_DECODER_LENGTH_STATUS_OK",
+ "FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR",
+ "FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED"
+};
+
FLAC_API const char * const FLAC__StreamDecoderWriteStatusString[] = {
"FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE",
"FLAC__STREAM_DECODER_WRITE_STATUS_ABORT"
FLAC_API const char * const FLAC__StreamDecoderErrorStatusString[] = {
"FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC",
"FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER",
- "FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH"
+ "FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH",
+ "FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM"
};
/***********************************************************************
for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
decoder->private_->output[i] = 0;
- decoder->private_->residual[i] = 0;
+ decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0;
}
decoder->private_->output_capacity = 0;
for(i = 0; i < FLAC__MAX_CHANNELS; i++)
FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&decoder->private_->partitioned_rice_contents[i]);
+ decoder->private_->file = 0;
+
set_defaults_(decoder);
decoder->protected_->state = FLAC__STREAM_DECODER_UNINITIALIZED;
*
***********************************************************************/
-FLAC_API FLAC__StreamDecoderState FLAC__stream_decoder_init(FLAC__StreamDecoder *decoder)
+FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_stream(
+ FLAC__StreamDecoder *decoder,
+ FLAC__StreamDecoderReadCallback read_callback,
+ FLAC__StreamDecoderSeekCallback seek_callback,
+ FLAC__StreamDecoderTellCallback tell_callback,
+ FLAC__StreamDecoderLengthCallback length_callback,
+ FLAC__StreamDecoderEofCallback eof_callback,
+ FLAC__StreamDecoderWriteCallback write_callback,
+ FLAC__StreamDecoderMetadataCallback metadata_callback,
+ FLAC__StreamDecoderErrorCallback error_callback,
+ void *client_data
+)
{
FLAC__ASSERT(0 != decoder);
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
- return decoder->protected_->state = FLAC__STREAM_DECODER_ALREADY_INITIALIZED;
+ return FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED;
- if(0 == decoder->private_->read_callback || 0 == decoder->private_->write_callback || 0 == decoder->private_->metadata_callback || 0 == decoder->private_->error_callback)
- return decoder->protected_->state = FLAC__STREAM_DECODER_INVALID_CALLBACK;
-
- if(!FLAC__bitbuffer_init(decoder->private_->input))
- return decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
-
- decoder->private_->last_frame_number = 0;
- decoder->private_->samples_decoded = 0;
- decoder->private_->has_stream_info = false;
- decoder->private_->cached = false;
+ if(
+ 0 == read_callback ||
+ 0 == write_callback ||
+ 0 == error_callback ||
+ (seek_callback && (0 == tell_callback || 0 == length_callback || 0 == eof_callback))
+ )
+ return FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS;
/*
* get the CPU info and set the function pointers
decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal;
decoder->private_->local_lpc_restore_signal_64bit = FLAC__lpc_restore_signal_wide;
decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal;
+ decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal;
/* now override with asm where appropriate */
#ifndef FLAC__NO_ASM
if(decoder->private_->cpuinfo.use_asm) {
if(decoder->private_->cpuinfo.data.ia32.mmx) {
decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal_asm_ia32;
decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ia32_mmx;
+ decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ia32_mmx;
}
else {
decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal_asm_ia32;
decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ia32;
+ decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ia32;
}
#endif
+#elif defined FLAC__CPU_PPC
+ FLAC__ASSERT(decoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_PPC);
+ if(decoder->private_->cpuinfo.data.ppc.altivec) {
+ decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ppc_altivec_16;
+ decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ppc_altivec_16_order8;
+ }
#endif
}
#endif
- if(!FLAC__stream_decoder_reset(decoder))
- return decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ /* from here on, errors are fatal */
- return decoder->protected_->state;
+ if(!FLAC__bitbuffer_init(decoder->private_->input)) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ return FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR;
+ }
+
+ decoder->private_->read_callback = read_callback;
+ decoder->private_->seek_callback = seek_callback;
+ decoder->private_->tell_callback = tell_callback;
+ decoder->private_->length_callback = length_callback;
+ decoder->private_->eof_callback = eof_callback;
+ decoder->private_->write_callback = write_callback;
+ decoder->private_->metadata_callback = metadata_callback;
+ decoder->private_->error_callback = error_callback;
+ decoder->private_->client_data = client_data;
+ decoder->private_->last_frame_number = 0;
+ decoder->private_->last_block_size = 0;
+ decoder->private_->samples_decoded = 0;
+ decoder->private_->has_stream_info = false;
+ decoder->private_->cached = false;
+
+ decoder->private_->do_md5_checking = decoder->protected_->md5_checking;
+ decoder->private_->is_seeking = false;
+
+ decoder->private_->internal_reset_hack = true; /* so the following reset does not try to rewind the input */
+ if(!FLAC__stream_decoder_reset(decoder)) {
+ /* above call sets the state for us */
+ return FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR;
+ }
+
+ return FLAC__STREAM_DECODER_INIT_STATUS_OK;
+}
+
+FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_FILE(
+ FLAC__StreamDecoder *decoder,
+ FILE *file,
+ FLAC__StreamDecoderWriteCallback write_callback,
+ FLAC__StreamDecoderMetadataCallback metadata_callback,
+ FLAC__StreamDecoderErrorCallback error_callback,
+ void *client_data
+)
+{
+ FLAC__ASSERT(0 != decoder);
+ FLAC__ASSERT(0 != file);
+
+ if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
+ return decoder->protected_->state = FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED;
+
+ if(0 == write_callback || 0 == error_callback)
+ return decoder->protected_->state = FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS;
+
+ /*
+ * To make sure that our file does not go unclosed after an error, we
+ * must assign the FILE pointer before any further error can occur in
+ * this routine.
+ */
+ if(file == stdin)
+ file = get_binary_stdin_(); /* just to be safe */
+
+ decoder->private_->file = file;
+
+ return FLAC__stream_decoder_init_stream(
+ decoder,
+ file_read_callback_,
+ decoder->private_->file == stdin? 0: file_seek_callback_,
+ decoder->private_->file == stdin? 0: file_tell_callback_,/*@@@@@@ might work for stdin*/
+ decoder->private_->file == stdin? 0: file_length_callback_,
+ decoder->private_->file == stdin? 0: file_eof_callback_,/*@@@@@@ might work for stdin*/
+ write_callback,
+ metadata_callback,
+ error_callback,
+ client_data
+ );
}
-FLAC_API void FLAC__stream_decoder_finish(FLAC__StreamDecoder *decoder)
+FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_file(
+ FLAC__StreamDecoder *decoder,
+ const char *filename,
+ FLAC__StreamDecoderWriteCallback write_callback,
+ FLAC__StreamDecoderMetadataCallback metadata_callback,
+ FLAC__StreamDecoderErrorCallback error_callback,
+ void *client_data
+)
{
+ FILE *file;
+
+ FLAC__ASSERT(0 != decoder);
+
+ /*
+ * To make sure that our file does not go unclosed after an error, we
+ * have to do the same entrance checks here that are later performed
+ * in FLAC__stream_decoder_init_FILE() before the FILE* is assigned.
+ */
+ if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
+ return decoder->protected_->state = FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED;
+
+ if(0 == write_callback || 0 == error_callback)
+ return decoder->protected_->state = FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS;
+
+ file = filename? fopen(filename, "rb") : stdin;
+
+ if(0 == file)
+ return FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE;
+
+ return FLAC__stream_decoder_init_FILE(decoder, file, write_callback, metadata_callback, error_callback, client_data);
+}
+
+FLAC_API FLAC__bool FLAC__stream_decoder_finish(FLAC__StreamDecoder *decoder)
+{
+ FLAC__bool md5_failed = false;
unsigned i;
+
FLAC__ASSERT(0 != decoder);
+ FLAC__ASSERT(0 != decoder->private_);
+ FLAC__ASSERT(0 != decoder->protected_);
+
if(decoder->protected_->state == FLAC__STREAM_DECODER_UNINITIALIZED)
- return;
- if(0 != decoder->private_->seek_table.data.seek_table.points) {
+ return true;
+
+ /* see the comment in FLAC__seekable_stream_decoder_reset() as to why we
+ * always call FLAC__MD5Final()
+ */
+ FLAC__MD5Final(decoder->private_->computed_md5sum, &decoder->private_->md5context);
+
+ if(decoder->private_->has_seek_table && 0 != decoder->private_->seek_table.data.seek_table.points) {
free(decoder->private_->seek_table.data.seek_table.points);
decoder->private_->seek_table.data.seek_table.points = 0;
decoder->private_->has_seek_table = false;
free(decoder->private_->output[i]-4);
decoder->private_->output[i] = 0;
}
- if(0 != decoder->private_->residual[i]) {
- free(decoder->private_->residual[i]);
- decoder->private_->residual[i] = 0;
+ if(0 != decoder->private_->residual_unaligned[i]) {
+ free(decoder->private_->residual_unaligned[i]);
+ decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0;
}
}
decoder->private_->output_capacity = 0;
decoder->private_->output_channels = 0;
- set_defaults_(decoder);
-
- decoder->protected_->state = FLAC__STREAM_DECODER_UNINITIALIZED;
-}
+ if(0 != decoder->private_->file) {
+ if(decoder->private_->file != stdin)
+ fclose(decoder->private_->file);
+ decoder->private_->file = 0;
+ }
-FLAC_API FLAC__bool FLAC__stream_decoder_set_read_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderReadCallback value)
-{
- FLAC__ASSERT(0 != decoder);
- FLAC__ASSERT(0 != decoder->private_);
- FLAC__ASSERT(0 != decoder->protected_);
- if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
- return false;
- decoder->private_->read_callback = value;
- return true;
-}
+ if(decoder->private_->do_md5_checking) {
+ if(memcmp(decoder->private_->stream_info.data.stream_info.md5sum, decoder->private_->computed_md5sum, 16))
+ md5_failed = true;
+ }
+ decoder->private_->is_seeking = false;
-FLAC_API FLAC__bool FLAC__stream_decoder_set_write_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderWriteCallback value)
-{
- FLAC__ASSERT(0 != decoder);
- FLAC__ASSERT(0 != decoder->private_);
- FLAC__ASSERT(0 != decoder->protected_);
- if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
- return false;
- decoder->private_->write_callback = value;
- return true;
-}
+ set_defaults_(decoder);
-FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderMetadataCallback value)
-{
- FLAC__ASSERT(0 != decoder);
- FLAC__ASSERT(0 != decoder->private_);
- FLAC__ASSERT(0 != decoder->protected_);
- if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
- return false;
- decoder->private_->metadata_callback = value;
- return true;
-}
+ decoder->protected_->state = FLAC__STREAM_DECODER_UNINITIALIZED;
-FLAC_API FLAC__bool FLAC__stream_decoder_set_error_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorCallback value)
-{
- FLAC__ASSERT(0 != decoder);
- FLAC__ASSERT(0 != decoder->private_);
- FLAC__ASSERT(0 != decoder->protected_);
- if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
- return false;
- decoder->private_->error_callback = value;
- return true;
+ return !md5_failed;
}
-FLAC_API FLAC__bool FLAC__stream_decoder_set_client_data(FLAC__StreamDecoder *decoder, void *value)
+FLAC_API FLAC__bool FLAC__stream_decoder_set_md5_checking(FLAC__StreamDecoder *decoder, FLAC__bool value)
{
FLAC__ASSERT(0 != decoder);
- FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->protected_);
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
return false;
- decoder->private_->client_data = value;
+ decoder->protected_->md5_checking = value;
return true;
}
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->protected_);
- FLAC__ASSERT((unsigned)type < (1u << FLAC__STREAM_METADATA_TYPE_LEN));
+ FLAC__ASSERT((unsigned)type <= FLAC__MAX_METADATA_TYPE_CODE);
/* double protection */
- if((unsigned)type >= (1u << FLAC__STREAM_METADATA_TYPE_LEN))
+ if((unsigned)type > FLAC__MAX_METADATA_TYPE_CODE)
return false;
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
return false;
FLAC__ASSERT(0 != decoder->private_->metadata_filter_ids);
if(decoder->private_->metadata_filter_ids_count == decoder->private_->metadata_filter_ids_capacity) {
- if(0 == (decoder->private_->metadata_filter_ids = (FLAC__byte*)realloc(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity * 2)))
- return decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ if(0 == (decoder->private_->metadata_filter_ids = (FLAC__byte*)realloc(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity * 2))) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ return false;
+ }
decoder->private_->metadata_filter_ids_capacity *= 2;
}
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->protected_);
- FLAC__ASSERT((unsigned)type < (1u << FLAC__STREAM_METADATA_TYPE_LEN));
+ FLAC__ASSERT((unsigned)type <= FLAC__MAX_METADATA_TYPE_CODE);
/* double protection */
- if((unsigned)type >= (1u << FLAC__STREAM_METADATA_TYPE_LEN))
+ if((unsigned)type > FLAC__MAX_METADATA_TYPE_CODE)
return false;
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
return false;
FLAC__ASSERT(0 != decoder->private_->metadata_filter_ids);
if(decoder->private_->metadata_filter_ids_count == decoder->private_->metadata_filter_ids_capacity) {
- if(0 == (decoder->private_->metadata_filter_ids = (FLAC__byte*)realloc(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity * 2)))
- return decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ if(0 == (decoder->private_->metadata_filter_ids = (FLAC__byte*)realloc(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity * 2))) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ return false;
+ }
decoder->private_->metadata_filter_ids_capacity *= 2;
}
return decoder->protected_->state;
}
+FLAC_API const char *FLAC__stream_decoder_get_resolved_state_string(const FLAC__StreamDecoder *decoder)
+{
+ return FLAC__StreamDecoderStateString[decoder->protected_->state];
+}
+
+FLAC_API FLAC__bool FLAC__stream_decoder_get_md5_checking(const FLAC__StreamDecoder *decoder)
+{
+ FLAC__ASSERT(0 != decoder);
+ FLAC__ASSERT(0 != decoder->protected_);
+ return decoder->protected_->md5_checking;
+}
+
+FLAC_API FLAC__uint64 FLAC__stream_decoder_get_total_samples(const FLAC__StreamDecoder *decoder)
+{
+ FLAC__ASSERT(0 != decoder);
+ FLAC__ASSERT(0 != decoder->protected_);
+ return decoder->private_->has_stream_info? decoder->private_->stream_info.data.stream_info.total_samples : 0;
+}
+
FLAC_API unsigned FLAC__stream_decoder_get_channels(const FLAC__StreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
return decoder->protected_->blocksize;
}
+FLAC_API FLAC__bool FLAC__stream_decoder_get_decode_position(const FLAC__StreamDecoder *decoder, FLAC__uint64 *position)
+{
+ FLAC__ASSERT(0 != decoder);
+ FLAC__ASSERT(0 != decoder->private_);
+ FLAC__ASSERT(0 != position);
+
+ if(0 == decoder->private_->tell_callback)
+ return false;
+ if(decoder->private_->tell_callback(decoder, position, decoder->private_->client_data) != FLAC__STREAM_DECODER_TELL_STATUS_OK)
+ return false;
+ FLAC__ASSERT(*position >= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder));
+ *position -= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder);
+ return true;
+}
+
FLAC_API FLAC__bool FLAC__stream_decoder_flush(FLAC__StreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->protected_);
+ decoder->private_->samples_decoded = 0;
+ decoder->private_->do_md5_checking = false;
+
if(!FLAC__bitbuffer_clear(decoder->private_->input)) {
decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
return false;
}
+ decoder->private_->last_frame_number = 0;
+ decoder->private_->last_block_size = 0;
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
return true;
FLAC__ASSERT(0 != decoder->protected_);
if(!FLAC__stream_decoder_flush(decoder)) {
- decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ /* above call sets the state for us */
return false;
}
+
+ /* Rewind if necessary. If FLAC__stream_decoder_init() is calling us,
+ * (internal_reset_hack) don't try to rewind since we are already at
+ * the beginning of the stream and don't want to fail if the input is
+ * not seekable.
+ */
+ if(!decoder->private_->internal_reset_hack) {
+ if(decoder->private_->file == stdin)
+ return false; /* can't rewind stdin, reset fails */
+ if(decoder->private_->seek_callback && decoder->private_->seek_callback(decoder, 0, decoder->private_->client_data) == FLAC__STREAM_DECODER_SEEK_STATUS_ERROR)
+ return false; /* seekable and seek fails, reset fails */
+ }
+ else
+ decoder->private_->internal_reset_hack = false;
+
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_METADATA;
- decoder->private_->samples_decoded = 0;
+ decoder->private_->has_stream_info = false;
+ if(decoder->private_->has_seek_table && 0 != decoder->private_->seek_table.data.seek_table.points) {
+ free(decoder->private_->seek_table.data.seek_table.points);
+ decoder->private_->seek_table.data.seek_table.points = 0;
+ decoder->private_->has_seek_table = false;
+ }
+ decoder->private_->do_md5_checking = decoder->protected_->md5_checking;
+
+ /* We initialize the FLAC__MD5Context even though we may never use it. This
+ * is because md5 checking may be turned on to start and then turned off if
+ * a seek occurs. So we init the context here and finalize it in
+ * FLAC__seekable_stream_decoder_finish() to make sure things are always
+ * cleaned up properly.
+ */
+ FLAC__MD5Init(&decoder->private_->md5context);
+
+ decoder->private_->first_frame_offset = 0;
+ decoder->private_->unparseable_frame_count = 0;
return true;
}
return true; /* above function sets the status for us */
break;
case FLAC__STREAM_DECODER_READ_FRAME:
- if(!read_frame_(decoder, &got_a_frame))
+ if(!read_frame_(decoder, &got_a_frame, /*do_full_decode=*/true))
return false; /* above function sets the status for us */
if(got_a_frame)
return true; /* above function sets the status for us */
return true; /* above function sets the status for us */
break;
case FLAC__STREAM_DECODER_READ_FRAME:
- if(!read_frame_(decoder, &dummy))
+ if(!read_frame_(decoder, &dummy, /*do_full_decode=*/true))
+ return false; /* above function sets the status for us */
+ break;
+ case FLAC__STREAM_DECODER_END_OF_STREAM:
+ case FLAC__STREAM_DECODER_ABORTED:
+ return true;
+ default:
+ FLAC__ASSERT(0);
+ return false;
+ }
+ }
+}
+
+FLAC_API FLAC__bool FLAC__stream_decoder_skip_single_frame(FLAC__StreamDecoder *decoder)
+{
+ FLAC__bool got_a_frame;
+ FLAC__ASSERT(0 != decoder);
+ FLAC__ASSERT(0 != decoder->protected_);
+
+ while(1) {
+ switch(decoder->protected_->state) {
+ case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
+ case FLAC__STREAM_DECODER_READ_METADATA:
+ return false; /* above function sets the status for us */
+ case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
+ if(!frame_sync_(decoder))
+ return true; /* above function sets the status for us */
+ break;
+ case FLAC__STREAM_DECODER_READ_FRAME:
+ if(!read_frame_(decoder, &got_a_frame, /*do_full_decode=*/false))
return false; /* above function sets the status for us */
+ if(got_a_frame)
+ return true; /* above function sets the status for us */
break;
case FLAC__STREAM_DECODER_END_OF_STREAM:
case FLAC__STREAM_DECODER_ABORTED:
}
}
+FLAC_API FLAC__bool FLAC__stream_decoder_seek_absolute(FLAC__StreamDecoder *decoder, FLAC__uint64 sample)
+{
+ FLAC__uint64 length;
+
+ FLAC__ASSERT(0 != decoder);
+
+ if(
+ decoder->protected_->state != FLAC__STREAM_DECODER_SEARCH_FOR_METADATA &&
+ decoder->protected_->state != FLAC__STREAM_DECODER_READ_METADATA &&
+ decoder->protected_->state != FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC &&
+ decoder->protected_->state != FLAC__STREAM_DECODER_READ_FRAME &&
+ decoder->protected_->state != FLAC__STREAM_DECODER_END_OF_STREAM
+ )
+ return false;
+
+ if(0 == decoder->private_->seek_callback)
+ return false;
+
+ FLAC__ASSERT(decoder->private_->seek_callback);
+ FLAC__ASSERT(decoder->private_->tell_callback);
+ FLAC__ASSERT(decoder->private_->length_callback);
+ FLAC__ASSERT(decoder->private_->eof_callback);
+
+ if(FLAC__stream_decoder_get_total_samples(decoder) > 0 && sample >= FLAC__stream_decoder_get_total_samples(decoder))
+ return false;
+
+ decoder->private_->is_seeking = true;
+
+ /* turn off md5 checking if a seek is attempted */
+ decoder->private_->do_md5_checking = false;
+
+ /* get the file length (currently our algorithm needs to know the length so it's also an error to get FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED) */
+ if(decoder->private_->length_callback(decoder, &length, decoder->private_->client_data) != FLAC__STREAM_DECODER_LENGTH_STATUS_OK) {
+ decoder->private_->is_seeking = false;
+ return false;
+ }
+ /* if we haven't finished processing the metadata yet, do that so we have the STREAMINFO, SEEK_TABLE, and first_frame_offset */
+ if(
+ decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_METADATA ||
+ decoder->protected_->state == FLAC__STREAM_DECODER_READ_METADATA
+ ) {
+ if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder)) {
+ /* above call sets the state for us */
+ decoder->private_->is_seeking = false;
+ return false;
+ }
+ /* check this again in case we didn't know total_samples the first time */
+ if(FLAC__stream_decoder_get_total_samples(decoder) > 0 && sample >= FLAC__stream_decoder_get_total_samples(decoder)) {
+ decoder->private_->is_seeking = false;
+ return false;
+ }
+ }
+
+ {
+ FLAC__bool ok = seek_to_absolute_sample_(decoder, length, sample);
+ decoder->private_->is_seeking = false;
+ return ok;
+ }
+}
+
/***********************************************************************
*
* Protected class methods
void set_defaults_(FLAC__StreamDecoder *decoder)
{
decoder->private_->read_callback = 0;
+ decoder->private_->seek_callback = 0;
+ decoder->private_->tell_callback = 0;
+ decoder->private_->length_callback = 0;
+ decoder->private_->eof_callback = 0;
decoder->private_->write_callback = 0;
decoder->private_->metadata_callback = 0;
decoder->private_->error_callback = 0;
memset(decoder->private_->metadata_filter, 0, sizeof(decoder->private_->metadata_filter));
decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO] = true;
decoder->private_->metadata_filter_ids_count = 0;
+
+ decoder->protected_->md5_checking = false;
+}
+
+/*
+ * This will forcibly set stdin to binary mode (for OSes that require it)
+ */
+FILE *get_binary_stdin_()
+{
+ /* if something breaks here it is probably due to the presence or
+ * absence of an underscore before the identifiers 'setmode',
+ * 'fileno', and/or 'O_BINARY'; check your system header files.
+ */
+#if defined _MSC_VER || defined __MINGW32__
+ _setmode(_fileno(stdin), _O_BINARY);
+#elif defined __CYGWIN__ || defined __EMX__
+ /* almost certainly not needed for any modern Cygwin, but let's be safe... */
+ setmode(_fileno(stdin), _O_BINARY);
+#endif
+
+ return stdin;
}
FLAC__bool allocate_output_(FLAC__StreamDecoder *decoder, unsigned size, unsigned channels)
free(decoder->private_->output[i]-4);
decoder->private_->output[i] = 0;
}
- if(0 != decoder->private_->residual[i]) {
- free(decoder->private_->residual[i]);
- decoder->private_->residual[i] = 0;
+ if(0 != decoder->private_->residual_unaligned[i]) {
+ free(decoder->private_->residual_unaligned[i]);
+ decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0;
}
}
memset(tmp, 0, sizeof(FLAC__int32)*4);
decoder->private_->output[i] = tmp + 4;
- tmp = (FLAC__int32*)malloc(sizeof(FLAC__int32)*size);
- if(tmp == 0) {
+ /* WATCHOUT:
+ * minimum of quadword alignment for PPC vector optimizations is REQUIRED:
+ */
+ if(!FLAC__memory_alloc_aligned_int32_array(size, &decoder->private_->residual_unaligned[i], &decoder->private_->residual[i])) {
decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
return false;
}
- decoder->private_->residual[i] = tmp;
}
decoder->private_->output_capacity = size;
}
else {
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
}
if(x == FLAC__STREAM_SYNC_STRING[i]) {
first = true;
i = 0;
if(id == 3) {
if(!skip_id3v2_tag_(decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* skip_id3v2_tag_ sets the state for us */
}
continue;
}
+ id = 0;
if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
decoder->private_->header_warmup[0] = (FLAC__byte)x;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
/* we have to check if we just read two 0xff's in a row; the second may actually be the beginning of the sync code */
/* else we have to check if the second byte is the end of a sync code */
}
i = 0;
if(first) {
- decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data);
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
first = false;
}
}
FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input));
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_IS_LAST_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
is_last = x? true : false;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &type, FLAC__STREAM_METADATA_TYPE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &length, FLAC__STREAM_METADATA_LENGTH_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(type == FLAC__METADATA_TYPE_STREAMINFO) {
if(!read_metadata_streaminfo_(decoder, is_last, length))
return false;
decoder->private_->has_stream_info = true;
- if(decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO])
+ if(0 == memcmp(decoder->private_->stream_info.data.stream_info.md5sum, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16))
+ decoder->private_->do_md5_checking = false;
+ if(!decoder->private_->is_seeking && decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO] && decoder->private_->metadata_callback)
decoder->private_->metadata_callback(decoder, &decoder->private_->stream_info, decoder->private_->client_data);
}
else if(type == FLAC__METADATA_TYPE_SEEKTABLE) {
return false;
decoder->private_->has_seek_table = true;
- if(decoder->private_->metadata_filter[FLAC__METADATA_TYPE_SEEKTABLE])
+ if(!decoder->private_->is_seeking && decoder->private_->metadata_filter[FLAC__METADATA_TYPE_SEEKTABLE] && decoder->private_->metadata_callback)
decoder->private_->metadata_callback(decoder, &decoder->private_->seek_table, decoder->private_->client_data);
}
else {
if(type == FLAC__METADATA_TYPE_APPLICATION) {
if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
real_length -= FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8;
if(skip_it) {
if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, real_length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
}
else {
switch(type) {
case FLAC__METADATA_TYPE_PADDING:
/* skip the padding bytes */
if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, real_length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
break;
case FLAC__METADATA_TYPE_APPLICATION:
/* remember, we read the ID already */
return false;
}
if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.data, real_length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
}
else
block.data.application.data = 0;
if(!read_metadata_cuesheet_(decoder, &block.data.cue_sheet))
return false;
break;
+ case FLAC__METADATA_TYPE_PICTURE:
+ if(!read_metadata_picture_(decoder, &block.data.picture))
+ return false;
+ break;
case FLAC__METADATA_TYPE_STREAMINFO:
case FLAC__METADATA_TYPE_SEEKTABLE:
FLAC__ASSERT(0);
return false;
}
if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.unknown.data, real_length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
}
else
block.data.unknown.data = 0;
break;
}
- decoder->private_->metadata_callback(decoder, &block, decoder->private_->client_data);
+ if(!decoder->private_->is_seeking && decoder->private_->metadata_callback)
+ decoder->private_->metadata_callback(decoder, &block, decoder->private_->client_data);
/* now we have to free any malloc'ed data in the block */
switch(type) {
if(0 != block.data.cue_sheet.tracks)
free(block.data.cue_sheet.tracks);
break;
+ case FLAC__METADATA_TYPE_PICTURE:
+ if(0 != block.data.picture.mime_type)
+ free(block.data.picture.mime_type);
+ if(0 != block.data.picture.description)
+ free(block.data.picture.description);
+ if(0 != block.data.picture.data)
+ free(block.data.picture.data);
+ break;
case FLAC__METADATA_TYPE_STREAMINFO:
case FLAC__METADATA_TYPE_SEEKTABLE:
FLAC__ASSERT(0);
}
}
- if(is_last)
+ if(is_last) {
+ /* if this fails, it's OK, it's just a hint for the seek routine */
+ if(!FLAC__stream_decoder_get_decode_position(decoder, &decoder->private_->first_frame_offset))
+ decoder->private_->first_frame_offset = 0;
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
+ }
return true;
}
bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, bits, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
decoder->private_->stream_info.data.stream_info.min_blocksize = x;
used_bits += bits;
bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
decoder->private_->stream_info.data.stream_info.max_blocksize = x;
used_bits += bits;
bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
decoder->private_->stream_info.data.stream_info.min_framesize = x;
used_bits += bits;
bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
decoder->private_->stream_info.data.stream_info.max_framesize = x;
used_bits += bits;
bits = FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
decoder->private_->stream_info.data.stream_info.sample_rate = x;
used_bits += bits;
bits = FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
decoder->private_->stream_info.data.stream_info.channels = x+1;
used_bits += bits;
bits = FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
decoder->private_->stream_info.data.stream_info.bits_per_sample = x+1;
used_bits += bits;
bits = FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN;
if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &decoder->private_->stream_info.data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
used_bits += bits;
if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, decoder->private_->stream_info.data.stream_info.md5sum, 16, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
used_bits += 16*8;
/* skip the rest of the block */
FLAC__ASSERT(used_bits % 8 == 0);
length -= (used_bits / 8);
if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
return true;
}
}
for(i = 0; i < decoder->private_->seek_table.data.seek_table.num_points; i++) {
if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
decoder->private_->seek_table.data.seek_table.points[i].sample_number = xx;
if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
decoder->private_->seek_table.data.seek_table.points[i].stream_offset = xx;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
decoder->private_->seek_table.data.seek_table.points[i].frame_samples = x;
}
length -= (decoder->private_->seek_table.data.seek_table.num_points * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH);
if(length > 0) {
/*@@@ do an error_callback() here? there's an argument for either way */
if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
}
return true;
/* read vendor string */
FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->vendor_string.length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(obj->vendor_string.length > 0) {
- if(0 == (obj->vendor_string.entry = (FLAC__byte*)malloc(obj->vendor_string.length))) {
+ if(0 == (obj->vendor_string.entry = (FLAC__byte*)malloc(obj->vendor_string.length+1))) {
decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
return false;
}
if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, obj->vendor_string.entry, obj->vendor_string.length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
+ obj->vendor_string.entry[obj->vendor_string.length] = '\0';
}
else
obj->vendor_string.entry = 0;
/* read num comments */
FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN == 32);
if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->num_comments, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
/* read comments */
if(obj->num_comments > 0) {
for(i = 0; i < obj->num_comments; i++) {
FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->comments[i].length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(obj->comments[i].length > 0) {
- if(0 == (obj->comments[i].entry = (FLAC__byte*)malloc(obj->comments[i].length))) {
+ if(0 == (obj->comments[i].entry = (FLAC__byte*)malloc(obj->comments[i].length+1))) {
decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
return false;
}
if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, obj->comments[i].entry, obj->comments[i].length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
+ obj->comments[i].entry[obj->comments[i].length] = '\0';
}
else
obj->comments[i].entry = 0;
FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)obj->media_catalog_number, FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN/8, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &obj->lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
obj->is_cd = x? true : false;
if(!FLAC__bitbuffer_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
obj->num_tracks = x;
if(obj->num_tracks > 0) {
for(i = 0; i < obj->num_tracks; i++) {
FLAC__StreamMetadata_CueSheet_Track *track = &obj->tracks[i];
if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
track->number = (FLAC__byte)x;
FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
track->type = x;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
track->pre_emphasis = x;
if(!FLAC__bitbuffer_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
track->num_indices = (FLAC__byte)x;
if(track->num_indices > 0) {
for(j = 0; j < track->num_indices; j++) {
FLAC__StreamMetadata_CueSheet_Index *index = &track->indices[j];
if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &index->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
index->number = (FLAC__byte)x;
if(!FLAC__bitbuffer_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
}
}
}
return true;
}
+FLAC__bool read_metadata_picture_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_Picture *obj)
+{
+ FLAC__uint32 len;
+
+ FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input));
+
+ /* read type */
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &obj->type, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN, read_callback_, decoder))
+ return false; /* read_callback_ sets the state for us */
+
+ /* read MIME type */
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &len, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN, read_callback_, decoder))
+ return false; /* read_callback_ sets the state for us */
+ if(0 == (obj->mime_type = (char*)malloc(len+1))) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ return false;
+ }
+ if(len > 0) {
+ if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)obj->mime_type, len, read_callback_, decoder))
+ return false; /* read_callback_ sets the state for us */
+ }
+ obj->mime_type[len] = '\0';
+
+ /* read description */
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &len, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN, read_callback_, decoder))
+ return false; /* read_callback_ sets the state for us */
+ if(0 == (obj->description = (FLAC__byte*)malloc(len+1))) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ return false;
+ }
+ if(len > 0) {
+ if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, obj->description, len, read_callback_, decoder))
+ return false; /* read_callback_ sets the state for us */
+ }
+ obj->description[len] = '\0';
+
+ /* read width */
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &obj->width, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN, read_callback_, decoder))
+ return false; /* read_callback_ sets the state for us */
+
+ /* read height */
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &obj->height, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN, read_callback_, decoder))
+ return false; /* read_callback_ sets the state for us */
+
+ /* read depth */
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &obj->depth, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN, read_callback_, decoder))
+ return false; /* read_callback_ sets the state for us */
+
+ /* read colors */
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &obj->colors, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN, read_callback_, decoder))
+ return false; /* read_callback_ sets the state for us */
+
+ /* read data */
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &(obj->data_length), FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN, read_callback_, decoder))
+ return false; /* read_callback_ sets the state for us */
+ if(0 == (obj->data = (FLAC__byte*)malloc(obj->data_length))) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ return false;
+ }
+ if(obj->data_length > 0) {
+ if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, obj->data, obj->data_length, read_callback_, decoder))
+ return false; /* read_callback_ sets the state for us */
+ }
+
+ return true;
+}
+
FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder)
{
FLAC__uint32 x;
/* skip the version and flags bytes */
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 24, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
/* get the size (in bytes) to skip */
skip = 0;
for(i = 0; i < 4; i++) {
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
skip <<= 7;
skip |= (x & 0x7f);
}
/* skip the rest of the tag */
if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, skip, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
return true;
}
/* If we know the total number of samples in the stream, stop if we've read that many. */
/* This will stop us, for example, from wasting time trying to sync on an ID3V1 tag. */
- if(decoder->private_->has_stream_info && decoder->private_->stream_info.data.stream_info.total_samples) {
- if(decoder->private_->samples_decoded >= decoder->private_->stream_info.data.stream_info.total_samples) {
+ if(FLAC__stream_decoder_get_total_samples(decoder) > 0) {
+ if(decoder->private_->samples_decoded >= FLAC__stream_decoder_get_total_samples(decoder)) {
decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
return true;
}
/* make sure we're byte aligned */
if(!FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)) {
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__bitbuffer_bits_left_for_byte_alignment(decoder->private_->input), read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
}
while(1) {
}
else {
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
}
if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
decoder->private_->header_warmup[0] = (FLAC__byte)x;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
/* we have to check if we just read two 0xff's in a row; the second may actually be the beginning of the sync code */
/* else we have to check if the second byte is the end of a sync code */
}
}
if(first) {
- decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data);
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
first = false;
}
}
return true;
}
-FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame)
+FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame, FLAC__bool do_full_decode)
{
unsigned channel;
unsigned i;
if(!read_frame_header_(decoder))
return false;
- if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC)
+ if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means we didn't sync on a valid header */
return true;
if(!allocate_output_(decoder, decoder->private_->frame.header.blocksize, decoder->private_->frame.header.channels))
return false;
/*
* now read it
*/
- if(!read_subframe_(decoder, channel, bps))
+ if(!read_subframe_(decoder, channel, bps, do_full_decode))
return false;
- if(decoder->protected_->state != FLAC__STREAM_DECODER_READ_FRAME) {
- decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
+ if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
return true;
- }
}
if(!read_zero_padding_(decoder))
return false;
*/
frame_crc = FLAC__bitbuffer_get_read_crc16(decoder->private_->input);
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__FRAME_FOOTER_CRC_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(frame_crc == (FLAC__uint16)x) {
- /* Undo any special channel coding */
- switch(decoder->private_->frame.header.channel_assignment) {
- case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
- /* do nothing */
- break;
- case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
- FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
- for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
- decoder->private_->output[1][i] = decoder->private_->output[0][i] - decoder->private_->output[1][i];
- break;
- case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
- FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
- for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
- decoder->private_->output[0][i] += decoder->private_->output[1][i];
- break;
- case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
- FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
- for(i = 0; i < decoder->private_->frame.header.blocksize; i++) {
- mid = decoder->private_->output[0][i];
- side = decoder->private_->output[1][i];
- mid <<= 1;
- if(side & 1) /* i.e. if 'side' is odd... */
- mid++;
- left = mid + side;
- right = mid - side;
- decoder->private_->output[0][i] = left >> 1;
- decoder->private_->output[1][i] = right >> 1;
- }
- break;
- default:
- FLAC__ASSERT(0);
- break;
+ if(do_full_decode) {
+ /* Undo any special channel coding */
+ switch(decoder->private_->frame.header.channel_assignment) {
+ case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
+ /* do nothing */
+ break;
+ case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
+ FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
+ for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
+ decoder->private_->output[1][i] = decoder->private_->output[0][i] - decoder->private_->output[1][i];
+ break;
+ case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
+ FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
+ for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
+ decoder->private_->output[0][i] += decoder->private_->output[1][i];
+ break;
+ case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
+ FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
+ for(i = 0; i < decoder->private_->frame.header.blocksize; i++) {
+ mid = decoder->private_->output[0][i];
+ side = decoder->private_->output[1][i];
+ mid <<= 1;
+ if(side & 1) /* i.e. if 'side' is odd... */
+ mid++;
+ left = mid + side;
+ right = mid - side;
+ decoder->private_->output[0][i] = left >> 1;
+ decoder->private_->output[1][i] = right >> 1;
+ }
+ break;
+ default:
+ FLAC__ASSERT(0);
+ break;
+ }
}
}
else {
/* Bad frame, emit error and zero the output signal */
- decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH, decoder->private_->client_data);
- for(channel = 0; channel < decoder->private_->frame.header.channels; channel++) {
- memset(decoder->private_->output[channel], 0, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize);
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH);
+ if(do_full_decode) {
+ for(channel = 0; channel < decoder->private_->frame.header.channels; channel++) {
+ memset(decoder->private_->output[channel], 0, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize);
+ }
}
}
decoder->private_->samples_decoded = decoder->private_->frame.header.number.sample_number + decoder->private_->frame.header.blocksize;
/* write it */
- if(decoder->private_->write_callback(decoder, &decoder->private_->frame, (const FLAC__int32 * const *)decoder->private_->output, decoder->private_->client_data) != FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE)
- return false;
+ if(do_full_decode) {
+ if(write_audio_frame_to_client_(decoder, &decoder->private_->frame, (const FLAC__int32 * const *)decoder->private_->output) != FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE)
+ return false;
+ }
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
return true;
*/
for(i = 0; i < 2; i++) {
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
/* if we get here it means our original sync was erroneous since the sync code cannot appear in the header */
decoder->private_->lookahead = (FLAC__byte)x;
decoder->private_->cached = true;
- decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data);
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
return true;
}
sample_rate_hint = x;
break;
case 15:
- decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data);
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
return true;
default:
}
if(raw_header[3] & 0x01) { /* this should be a zero padding bit */
- decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data);
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
return true;
}
- if(blocksize_hint && is_known_variable_blocksize_stream) {
- if(!FLAC__bitbuffer_read_utf8_uint64(decoder->private_->input, &xx, read_callback_, decoder, raw_header, &raw_header_len))
- return false; /* the read_callback_ sets the state for us */
- if(xx == 0xffffffffffffffff) { /* i.e. non-UTF8 code... */
- decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */
- decoder->private_->cached = true;
- decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data);
- decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
- return true;
+ /*
+ * Now we get to the regrettable consequences of not knowing for sure
+ * whether we got a frame number or a sample number. There are no
+ * encoders that do variable-blocksize encoding so unless we know from
+ * the STREAMINFO that it is variable-blocksize we will assume it is
+ * fixed-blocksize. The trouble comes when we have no STREAMINFO; again
+ * we will guess that is fixed-blocksize. Where this can go wrong: 1) a
+ * variable-blocksize stream with no STREAMINFO; 2) a fixed-blocksize
+ * stream that was edited such that one or more frames before or
+ * including this one do not have the same number of samples as the
+ * STREAMINFO's min and max blocksize.
+ */
+ if(is_known_variable_blocksize_stream) {
+ if(blocksize_hint) {
+ if(!FLAC__bitbuffer_read_utf8_uint64(decoder->private_->input, &xx, read_callback_, decoder, raw_header, &raw_header_len))
+ return false; /* read_callback_ sets the state for us */
+ if(xx == FLAC__U64L(0xffffffffffffffff)) { /* i.e. non-UTF8 code... */
+ decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */
+ decoder->private_->cached = true;
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
+ return true;
+ }
+ decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER;
+ decoder->private_->frame.header.number.sample_number = xx;
}
- decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER;
- decoder->private_->frame.header.number.sample_number = xx;
+ else
+ is_unparseable = true;
}
else {
if(!FLAC__bitbuffer_read_utf8_uint32(decoder->private_->input, &x, read_callback_, decoder, raw_header, &raw_header_len))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(x == 0xffffffff) { /* i.e. non-UTF8 code... */
decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */
decoder->private_->cached = true;
- decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data);
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
return true;
}
decoder->private_->last_frame_number = x;
+ decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER;
if(decoder->private_->has_stream_info) {
- decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER;
- decoder->private_->frame.header.number.sample_number = (FLAC__int64)decoder->private_->stream_info.data.stream_info.min_blocksize * (FLAC__int64)x;
+ FLAC__ASSERT(decoder->private_->stream_info.data.stream_info.min_blocksize == decoder->private_->stream_info.data.stream_info.max_blocksize);
+ decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->stream_info.data.stream_info.min_blocksize * (FLAC__uint64)x;
+ decoder->private_->last_block_size = decoder->private_->frame.header.blocksize;
+ }
+ else if(blocksize_hint) {
+ if(decoder->private_->last_block_size)
+ decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->last_block_size * (FLAC__uint64)x;
+ else
+ is_unparseable = true;
}
else {
- is_unparseable = true;
+ decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->frame.header.blocksize * (FLAC__uint64)x;
+ decoder->private_->last_block_size = decoder->private_->frame.header.blocksize;
}
}
if(blocksize_hint) {
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
raw_header[raw_header_len++] = (FLAC__byte)x;
if(blocksize_hint == 7) {
FLAC__uint32 _x;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &_x, 8, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
raw_header[raw_header_len++] = (FLAC__byte)_x;
x = (x << 8) | _x;
}
if(sample_rate_hint) {
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
raw_header[raw_header_len++] = (FLAC__byte)x;
if(sample_rate_hint != 12) {
FLAC__uint32 _x;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &_x, 8, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
raw_header[raw_header_len++] = (FLAC__byte)_x;
x = (x << 8) | _x;
}
/* read the CRC-8 byte */
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
crc8 = (FLAC__byte)x;
if(FLAC__crc8(raw_header, raw_header_len) != crc8) {
- decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data);
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
return true;
}
if(is_unparseable) {
- decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM;
- return false;
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
+ return true;
}
return true;
}
-FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps)
+FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
{
FLAC__uint32 x;
FLAC__bool wasted_bits;
+ unsigned i;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) /* MAGIC NUMBER */
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
wasted_bits = (x & 1);
x &= 0xfe;
if(wasted_bits) {
unsigned u;
if(!FLAC__bitbuffer_read_unary_unsigned(decoder->private_->input, &u, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
decoder->private_->frame.subframes[channel].wasted_bits = u+1;
bps -= decoder->private_->frame.subframes[channel].wasted_bits;
}
* Lots of magic numbers here
*/
if(x & 0x80) {
- decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data);
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
return true;
}
else if(x == 0) {
- if(!read_subframe_constant_(decoder, channel, bps))
+ if(!read_subframe_constant_(decoder, channel, bps, do_full_decode))
return false;
}
else if(x == 2) {
- if(!read_subframe_verbatim_(decoder, channel, bps))
+ if(!read_subframe_verbatim_(decoder, channel, bps, do_full_decode))
return false;
}
else if(x < 16) {
- decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM;
- return false;
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
+ return true;
}
else if(x <= 24) {
- if(!read_subframe_fixed_(decoder, channel, bps, (x>>1)&7))
+ if(!read_subframe_fixed_(decoder, channel, bps, (x>>1)&7, do_full_decode))
return false;
+ if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
+ return true;
}
else if(x < 64) {
- decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM;
- return false;
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
+ return true;
}
else {
- if(!read_subframe_lpc_(decoder, channel, bps, ((x>>1)&31)+1))
+ if(!read_subframe_lpc_(decoder, channel, bps, ((x>>1)&31)+1, do_full_decode))
return false;
+ if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
+ return true;
}
- if(wasted_bits) {
- unsigned i;
+ if(wasted_bits && do_full_decode) {
x = decoder->private_->frame.subframes[channel].wasted_bits;
for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
decoder->private_->output[channel][i] <<= x;
return true;
}
-FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps)
+FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
{
FLAC__Subframe_Constant *subframe = &decoder->private_->frame.subframes[channel].data.constant;
FLAC__int32 x;
decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_CONSTANT;
if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &x, bps, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
subframe->value = x;
/* decode the subframe */
- for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
- output[i] = x;
+ if(do_full_decode) {
+ for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
+ output[i] = x;
+ }
return true;
}
-FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order)
+FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode)
{
FLAC__Subframe_Fixed *subframe = &decoder->private_->frame.subframes[channel].data.fixed;
FLAC__int32 i32;
/* read warm-up samples */
for(u = 0; u < order; u++) {
if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i32, bps, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
subframe->warmup[u] = i32;
}
/* read entropy coding method info */
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
subframe->entropy_coding_method.type = (FLAC__EntropyCodingMethodType)u32;
switch(subframe->entropy_coding_method.type) {
case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
subframe->entropy_coding_method.data.partitioned_rice.order = u32;
subframe->entropy_coding_method.data.partitioned_rice.contents = &decoder->private_->partitioned_rice_contents[channel];
break;
default:
- decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM;
- return false;
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
+ return true;
}
/* read residual */
}
/* decode the subframe */
- memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
- FLAC__fixed_restore_signal(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, order, decoder->private_->output[channel]+order);
+ if(do_full_decode) {
+ memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
+ FLAC__fixed_restore_signal(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, order, decoder->private_->output[channel]+order);
+ }
return true;
}
-FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order)
+FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode)
{
FLAC__Subframe_LPC *subframe = &decoder->private_->frame.subframes[channel].data.lpc;
FLAC__int32 i32;
/* read warm-up samples */
for(u = 0; u < order; u++) {
if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i32, bps, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
subframe->warmup[u] = i32;
}
/* read qlp coeff precision */
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(u32 == (1u << FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN) - 1) {
- decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data);
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
return true;
}
/* read qlp shift */
if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i32, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
subframe->quantization_level = i32;
/* read quantized lp coefficiencts */
for(u = 0; u < order; u++) {
if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i32, subframe->qlp_coeff_precision, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
subframe->qlp_coeff[u] = i32;
}
/* read entropy coding method info */
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
subframe->entropy_coding_method.type = (FLAC__EntropyCodingMethodType)u32;
switch(subframe->entropy_coding_method.type) {
case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
subframe->entropy_coding_method.data.partitioned_rice.order = u32;
subframe->entropy_coding_method.data.partitioned_rice.contents = &decoder->private_->partitioned_rice_contents[channel];
break;
default:
- decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM;
- return false;
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
+ return true;
}
/* read residual */
}
/* decode the subframe */
- memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
- if(bps + subframe->qlp_coeff_precision + FLAC__bitmath_ilog2(order) <= 32)
- if(bps <= 16 && subframe->qlp_coeff_precision <= 16)
- decoder->private_->local_lpc_restore_signal_16bit(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->private_->output[channel]+order);
+ if(do_full_decode) {
+ memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
+ if(bps + subframe->qlp_coeff_precision + FLAC__bitmath_ilog2(order) <= 32)
+ if(bps <= 16 && subframe->qlp_coeff_precision <= 16) {
+ if(order <= 8)
+ decoder->private_->local_lpc_restore_signal_16bit_order8(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->private_->output[channel]+order);
+ else
+ decoder->private_->local_lpc_restore_signal_16bit(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->private_->output[channel]+order);
+ }
+ else
+ decoder->private_->local_lpc_restore_signal(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->private_->output[channel]+order);
else
- decoder->private_->local_lpc_restore_signal(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->private_->output[channel]+order);
- else
- decoder->private_->local_lpc_restore_signal_64bit(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->private_->output[channel]+order);
+ decoder->private_->local_lpc_restore_signal_64bit(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->private_->output[channel]+order);
+ }
return true;
}
-FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps)
+FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
{
FLAC__Subframe_Verbatim *subframe = &decoder->private_->frame.subframes[channel].data.verbatim;
FLAC__int32 x, *residual = decoder->private_->residual[channel];
for(i = 0; i < decoder->private_->frame.header.blocksize; i++) {
if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &x, bps, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
residual[i] = x;
}
/* decode the subframe */
- memcpy(decoder->private_->output[channel], subframe->data, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize);
+ if(do_full_decode)
+ memcpy(decoder->private_->output[channel], subframe->data, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize);
return true;
}
const unsigned partitions = 1u << partition_order;
const unsigned partition_samples = partition_order > 0? decoder->private_->frame.header.blocksize >> partition_order : decoder->private_->frame.header.blocksize - predictor_order;
+ /* sanity checks */
+ if(partition_order == 0) {
+ if(decoder->private_->frame.header.blocksize < predictor_order) {
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
+ return true;
+ }
+ }
+ else {
+ if(partition_samples < predictor_order) {
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
+ return true;
+ }
+ }
+
if(!FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, max(6, partition_order))) {
decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
return false;
sample = 0;
for(partition = 0; partition < partitions; partition++) {
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
partitioned_rice_contents->parameters[partition] = rice_parameter;
if(rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
-#ifdef FLAC__SYMMETRIC_RICE
- for(u = (partition_order == 0 || partition > 0)? 0 : predictor_order; u < partition_samples; u++, sample++) {
- if(!FLAC__bitbuffer_read_symmetric_rice_signed(decoder->private_->input, &i, rice_parameter, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- residual[sample] = i;
- }
-#else
u = (partition_order == 0 || partition > 0)? partition_samples : partition_samples - predictor_order;
if(!FLAC__bitbuffer_read_rice_signed_block(decoder->private_->input, residual + sample, u, rice_parameter, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
sample += u;
-#endif
}
else {
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
partitioned_rice_contents->raw_bits[partition] = rice_parameter;
for(u = (partition_order == 0 || partition > 0)? 0 : predictor_order; u < partition_samples; u++, sample++) {
if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i, rice_parameter, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
residual[sample] = i;
}
}
if(!FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)) {
FLAC__uint32 zero = 0;
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &zero, FLAC__bitbuffer_bits_left_for_byte_alignment(decoder->private_->input), read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ return false; /* read_callback_ sets the state for us */
if(zero != 0) {
- decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data);
+ send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
}
}
FLAC__bool read_callback_(FLAC__byte buffer[], unsigned *bytes, void *client_data)
{
FLAC__StreamDecoder *decoder = (FLAC__StreamDecoder *)client_data;
- FLAC__StreamDecoderReadStatus status;
- status = decoder->private_->read_callback(decoder, buffer, bytes, decoder->private_->client_data);
- if(status == FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM)
+ if(decoder->private_->eof_callback && decoder->private_->eof_callback(decoder, decoder->private_->client_data)) {
+ *bytes = 0;
decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
- else if(status == FLAC__STREAM_DECODER_READ_STATUS_ABORT)
+ return false;
+ }
+ else if(*bytes > 0) {
+ /* While seeking, it is possible for our seek to land in the
+ * middle of audio data that looks exactly like a frame header
+ * from a future version of an encoder. When that happens, our
+ * error callback will get an
+ * FLAC__STREAM_DECODER_UNPARSEABLE_STREAM and increment its
+ * unparseable_frame_count. But there is a remote possibility
+ * that it is properly synced at such a "future-codec frame",
+ * so to make sure, we wait to see many "unparseable" errors in
+ * a row before bailing out.
+ */
+ if(decoder->private_->is_seeking && decoder->private_->unparseable_frame_count > 20) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
+ return false;
+ }
+ else {
+ const FLAC__StreamDecoderReadStatus status = decoder->private_->read_callback(decoder, buffer, bytes, decoder->private_->client_data);
+ if(status == FLAC__STREAM_DECODER_READ_STATUS_ABORT) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
+ return false;
+ }
+ else if(*bytes == 0) {
+ if(status == FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM || (decoder->private_->eof_callback && decoder->private_->eof_callback(decoder, decoder->private_->client_data))) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
+ return false;
+ }
+ else
+ return true;
+ }
+ else
+ return true;
+ }
+ }
+ else {
+ /* abort to avoid a deadlock */
decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
- return status == FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
+ return false;
+ }
+}
+
+FLAC__StreamDecoderWriteStatus write_audio_frame_to_client_(FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[])
+{
+ if(decoder->private_->is_seeking) {
+ FLAC__uint64 this_frame_sample = frame->header.number.sample_number;
+ FLAC__uint64 next_frame_sample = this_frame_sample + (FLAC__uint64)frame->header.blocksize;
+ FLAC__uint64 target_sample = decoder->private_->target_sample;
+
+ FLAC__ASSERT(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
+
+ decoder->private_->last_frame = *frame; /* save the frame */
+ if(this_frame_sample <= target_sample && target_sample < next_frame_sample) { /* we hit our target frame */
+ unsigned delta = (unsigned)(target_sample - this_frame_sample);
+ /* kick out of seek mode */
+ decoder->private_->is_seeking = false;
+ /* shift out the samples before target_sample */
+ if(delta > 0) {
+ unsigned channel;
+ const FLAC__int32 *newbuffer[FLAC__MAX_CHANNELS];
+ for(channel = 0; channel < frame->header.channels; channel++)
+ newbuffer[channel] = buffer[channel] + delta;
+ decoder->private_->last_frame.header.blocksize -= delta;
+ decoder->private_->last_frame.header.number.sample_number += (FLAC__uint64)delta;
+ /* write the relevant samples */
+ return decoder->private_->write_callback(decoder, &decoder->private_->last_frame, newbuffer, decoder->private_->client_data);
+ }
+ else {
+ /* write the relevant samples */
+ return decoder->private_->write_callback(decoder, frame, buffer, decoder->private_->client_data);
+ }
+ }
+ else {
+ return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+ }
+ }
+ else {
+ /*
+ * If we never got STREAMINFO, turn off MD5 checking to save
+ * cycles since we don't have a sum to compare to anyway
+ */
+ if(!decoder->private_->has_stream_info)
+ decoder->private_->do_md5_checking = false;
+ if(decoder->private_->do_md5_checking) {
+ if(!FLAC__MD5Accumulate(&decoder->private_->md5context, buffer, frame->header.channels, frame->header.blocksize, (frame->header.bits_per_sample+7) / 8))
+ return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
+ }
+ return decoder->private_->write_callback(decoder, frame, buffer, decoder->private_->client_data);
+ }
+}
+
+void send_error_to_client_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status)
+{
+ if(!decoder->private_->is_seeking)
+ decoder->private_->error_callback(decoder, status, decoder->private_->client_data);
+ else if(status == FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM)
+ decoder->private_->unparseable_frame_count++;
+}
+
+FLAC__bool seek_to_absolute_sample_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample)
+{
+ FLAC__uint64 first_frame_offset = decoder->private_->first_frame_offset, lower_bound, upper_bound;
+ FLAC__int64 pos = -1, last_pos = -1;
+ int i, lower_seek_point = -1, upper_seek_point = -1;
+ unsigned approx_bytes_per_frame;
+ FLAC__uint64 last_frame_sample = FLAC__U64L(0xffffffffffffffff);
+ FLAC__bool needs_seek;
+ const FLAC__uint64 total_samples = FLAC__stream_decoder_get_total_samples(decoder);
+ const unsigned min_blocksize = decoder->private_->stream_info.data.stream_info.min_blocksize;
+ const unsigned max_blocksize = decoder->private_->stream_info.data.stream_info.max_blocksize;
+ const unsigned max_framesize = decoder->private_->stream_info.data.stream_info.max_framesize;
+ const unsigned channels = FLAC__stream_decoder_get_channels(decoder);
+ const unsigned bps = FLAC__stream_decoder_get_bits_per_sample(decoder);
+ const FLAC__StreamMetadata_SeekTable *seek_table = decoder->private_->has_seek_table? &decoder->private_->seek_table.data.seek_table : 0;
+
+ /* we are just guessing here, but we want to guess high, not low */
+ if(max_framesize > 0)
+ approx_bytes_per_frame = max_framesize;
+
+ /*
+ * Check if it's a known fixed-blocksize stream. Note that though
+ * the spec doesn't allow zeroes in the STREAMINFO block, we may
+ * never get a STREAMINFO block when decoding so the value of
+ * min_blocksize might be zero.
+ */
+ else if(min_blocksize == max_blocksize && min_blocksize > 0) {
+ /* note there are no () around 'bps/8' to keep precision up since it's an integer calulation */
+ approx_bytes_per_frame = min_blocksize * channels * bps/8 + 64;
+ }
+ else
+ approx_bytes_per_frame = 4608 * channels * bps/8 + 64;
+
+ /*
+ * First, we set an upper and lower bound on where in the
+ * stream we will search. For now we assume the worst case
+ * scenario, which is our best guess at the beginning of
+ * the first and last frames.
+ */
+ lower_bound = first_frame_offset;
+
+ /* calc the upper_bound, beyond which we never want to seek */
+ if(max_framesize > 0)
+ upper_bound = stream_length - (max_framesize + 128 + 2); /* 128 for a possible ID3V1 tag, 2 for indexing differences */
+ else
+ upper_bound = stream_length - ((channels * bps * FLAC__MAX_BLOCK_SIZE) / 8 + 128 + 2);
+
+ /*
+ * Now we refine the bounds if we have a seektable with
+ * suitable points. Note that according to the spec they
+ * must be ordered by ascending sample number.
+ */
+ if(seek_table) {
+ /* find the closest seek point <= target_sample, if it exists */
+ for(i = (int)seek_table->num_points - 1; i >= 0; i--) {
+ if(seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER && seek_table->points[i].sample_number <= target_sample)
+ break;
+ }
+ if(i >= 0) { /* i.e. we found a suitable seek point... */
+ lower_bound = first_frame_offset + seek_table->points[i].stream_offset;
+ lower_seek_point = i;
+ }
+
+ /* find the closest seek point > target_sample, if it exists */
+ for(i = 0; i < (int)seek_table->num_points; i++) {
+ if(seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER && seek_table->points[i].sample_number > target_sample)
+ break;
+ }
+ if(i < (int)seek_table->num_points) { /* i.e. we found a suitable seek point... */
+ upper_bound = first_frame_offset + seek_table->points[i].stream_offset;
+ upper_seek_point = i;
+ }
+ }
+
+ /*
+ * Now guess at where within those bounds our target
+ * sample will be.
+ */
+ if(seek_table && lower_seek_point >= 0) {
+ /* first see if our sample is within a few frames of the lower seekpoint */
+ if(seek_table->points[lower_seek_point].sample_number <= target_sample && target_sample < seek_table->points[lower_seek_point].sample_number + (seek_table->points[lower_seek_point].frame_samples * 4)) {
+ pos = (FLAC__int64)lower_bound;
+ }
+ else if(upper_seek_point >= 0) {
+ const FLAC__uint64 target_offset = target_sample - seek_table->points[lower_seek_point].sample_number;
+ const FLAC__uint64 range_samples = seek_table->points[upper_seek_point].sample_number - seek_table->points[lower_seek_point].sample_number;
+ const FLAC__uint64 range_bytes = (upper_bound>lower_bound? upper_bound - lower_bound - 1 : 0);
+#ifndef FLAC__INTEGER_ONLY_LIBRARY
+#if defined _MSC_VER || defined __MINGW32__
+ /* with MSVC you have to spoon feed it the casting */
+ pos = (FLAC__int64)lower_bound + (FLAC__int64)(((FLAC__double)(FLAC__int64)target_offset / (FLAC__double)(FLAC__int64)range_samples) * (FLAC__double)(FLAC__int64)(range_bytes-1)) - approx_bytes_per_frame;
+#else
+ pos = (FLAC__int64)lower_bound + (FLAC__int64)(((FLAC__double)target_offset / (FLAC__double)range_samples) * (FLAC__double)range_bytes) - approx_bytes_per_frame;
+#endif
+#else
+ /* a little less accurate: */
+ if (range_bytes <= 0xffffffff)
+ pos = (FLAC__int64)lower_bound + (FLAC__int64)((target_offset * range_bytes) / range_samples) - approx_bytes_per_frame;
+ else /* @@@ WATCHOUT, ~2TB limit */
+ pos = (FLAC__int64)lower_bound + (FLAC__int64)(((target_offset>>8) * (range_bytes>>8)) / (range_samples>>16)) - approx_bytes_per_frame;
+#endif
+ }
+ }
+
+ /*
+ * If there's no seek table, we need to use the metadata (if we
+ * have it) and the filelength to estimate the position of the
+ * frame with the correct sample.
+ */
+ if(pos < 0 && total_samples > 0) {
+ /*
+ * For max accuracy we should be using
+ * (stream_length-first_frame_offset-1) in the divisor, but the
+ * difference is trivial and (stream_length-first_frame_offset)
+ * has no chance of underflow.
+ */
+#ifndef FLAC__INTEGER_ONLY_LIBRARY
+#if defined _MSC_VER || defined __MINGW32__
+ /* with VC++ you have to spoon feed it the casting */
+ pos = (FLAC__int64)first_frame_offset + (FLAC__int64)(((FLAC__double)(FLAC__int64)target_sample / (FLAC__double)(FLAC__int64)total_samples) * (FLAC__double)(FLAC__int64)(stream_length-first_frame_offset)) - approx_bytes_per_frame;
+#else
+ pos = (FLAC__int64)first_frame_offset + (FLAC__int64)(((FLAC__double)target_sample / (FLAC__double)total_samples) * (FLAC__double)(stream_length-first_frame_offset)) - approx_bytes_per_frame;
+#endif
+#else
+ /* a little less accurate: */
+ if (stream_length < 0xffffffff)
+ pos = (FLAC__int64)first_frame_offset + (FLAC__int64)((target_sample * (stream_length-first_frame_offset)) / total_samples) - approx_bytes_per_frame;
+ else /* @@@ WATCHOUT, ~2TB limit */
+ pos = (FLAC__int64)first_frame_offset + (FLAC__int64)(((target_sample>>8) * ((stream_length-first_frame_offset)>>8)) / (total_samples>>16)) - approx_bytes_per_frame;
+#endif
+ }
+
+ /*
+ * If there's no seek table and total_samples is unknown, we
+ * don't even bother trying to figure out a target, we just use
+ * our current position.
+ */
+ if(pos < 0) {
+ FLAC__uint64 upos;
+ if(decoder->private_->tell_callback(decoder, &upos, decoder->private_->client_data) != FLAC__STREAM_DECODER_TELL_STATUS_OK) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
+ return false;
+ }
+ pos = (FLAC__int64)upos;
+ needs_seek = false;
+ }
+ else
+ needs_seek = true;
+
+ /* clip the position to the bounds, lower bound takes precedence */
+ if(pos >= (FLAC__int64)upper_bound) {
+ pos = (FLAC__int64)upper_bound-1;
+ needs_seek = true;
+ }
+ if(pos < (FLAC__int64)lower_bound) {
+ pos = (FLAC__int64)lower_bound;
+ needs_seek = true;
+ }
+
+ decoder->private_->target_sample = target_sample;
+ while(1) {
+ if(needs_seek) {
+ if(decoder->private_->seek_callback(decoder, (FLAC__uint64)pos, decoder->private_->client_data) != FLAC__STREAM_DECODER_SEEK_STATUS_OK) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
+ return false;
+ }
+ if(!FLAC__stream_decoder_flush(decoder)) {
+ /* above call sets the state for us */
+ return false;
+ }
+ }
+ /* Now we need to get a frame. First we need to reset our
+ * unparseable_frame_count; if we get too many unparseable
+ * frames in a row, the read callback will return
+ * FLAC__STREAM_DECODER_READ_STATUS_ABORT, causing
+ * FLAC__stream_decoder_process_single() to return false.
+ */
+ decoder->private_->unparseable_frame_count = 0;
+ if(!FLAC__stream_decoder_process_single(decoder)) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
+ return false;
+ }
+ /* our write callback will change the state when it gets to the target frame */
+ /* actually, we could have got_a_frame if our decoder is at FLAC__STREAM_DECODER_END_OF_STREAM so we need to check for that also */
+#if 0
+ /*@@@@@@ used to be the following; not clear if the check for end of stream is needed anymore */
+ if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_SEEKING && decoder->protected_->state != FLAC__STREAM_DECODER_END_OF_STREAM)
+ break;
+#endif
+ if(!decoder->private_->is_seeking) {
+ break;
+ }
+ else { /* we need to narrow the search */
+ const FLAC__uint64 this_frame_sample = decoder->private_->last_frame.header.number.sample_number;
+ FLAC__ASSERT(decoder->private_->last_frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
+ if(this_frame_sample == last_frame_sample && pos < last_pos) {
+ /* our last move backwards wasn't big enough, double it */
+ pos -= (last_pos - pos);
+ needs_seek = true;
+ }
+ else {
+ if(target_sample < this_frame_sample) {
+ last_pos = pos;
+ approx_bytes_per_frame = decoder->private_->last_frame.header.blocksize * channels * bps/8 + 64;
+ pos -= approx_bytes_per_frame;
+ needs_seek = true;
+ }
+ else { /* target_sample >= this_frame_sample + this frame's blocksize */
+ FLAC__uint64 upos;
+ if(decoder->private_->tell_callback(decoder, &upos, decoder->private_->client_data) != FLAC__STREAM_DECODER_TELL_STATUS_OK) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
+ return false;
+ }
+ last_pos = pos;
+ pos = (FLAC__int64)upos;
+ pos -= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder);
+ needs_seek = false;
+ /*
+ * if we haven't hit the target frame yet and our position hasn't changed,
+ * it means we're at the end of the stream and the seek target does not exist.
+ */
+ if(last_pos == pos) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
+ return false;
+ }
+ }
+ }
+ if(pos < (FLAC__int64)lower_bound)
+ pos = (FLAC__int64)lower_bound;
+ last_frame_sample = this_frame_sample;
+ }
+ }
+
+ return true;
+}
+
+FLAC__StreamDecoderReadStatus file_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data)
+{
+ (void)client_data;
+
+ if(*bytes > 0) {
+ *bytes = (unsigned)fread(buffer, sizeof(FLAC__byte), *bytes, decoder->private_->file);
+ if(ferror(decoder->private_->file))
+ return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
+ else if(*bytes == 0)
+ return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
+ else
+ return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
+ }
+ else
+ return FLAC__STREAM_DECODER_READ_STATUS_ABORT; /* abort to avoid a deadlock */
+}
+
+FLAC__StreamDecoderSeekStatus file_seek_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data)
+{
+ (void)client_data;
+
+ if(decoder->private_->file == stdin)
+ return FLAC__STREAM_DECODER_SEEK_STATUS_UNSUPPORTED;
+ else if(fseeko(decoder->private_->file, (off_t)absolute_byte_offset, SEEK_SET) < 0)
+ return FLAC__STREAM_DECODER_SEEK_STATUS_ERROR;
+ else
+ return FLAC__STREAM_DECODER_SEEK_STATUS_OK;
+}
+
+FLAC__StreamDecoderTellStatus file_tell_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
+{
+ off_t pos;
+ (void)client_data;
+
+ if(decoder->private_->file == stdin) /*@@@@@@ may work for stdin */
+ return FLAC__STREAM_DECODER_TELL_STATUS_UNSUPPORTED;
+ else if((pos = ftello(decoder->private_->file)) < 0)
+ return FLAC__STREAM_DECODER_TELL_STATUS_ERROR;
+ else {
+ *absolute_byte_offset = (FLAC__uint64)pos;
+ return FLAC__STREAM_DECODER_TELL_STATUS_OK;
+ }
+}
+
+FLAC__StreamDecoderLengthStatus file_length_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data)
+{
+ struct stat filestats;
+ (void)client_data;
+
+ if(decoder->private_->file == stdin)
+ return FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED;
+ else if(fstat(fileno(decoder->private_->file), &filestats) != 0)
+ return FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR;
+ else {
+ *stream_length = (FLAC__uint64)filestats.st_size;
+ return FLAC__STREAM_DECODER_LENGTH_STATUS_OK;
+ }
+}
+
+FLAC__bool file_eof_callback_(const FLAC__StreamDecoder *decoder, void *client_data)
+{
+ (void)client_data;
+
+ if(decoder->private_->file == stdin) /*@@@@@@ feof() may work for stdin */
+ return false;
+ return feof(decoder->private_->file)? true : false;
}
projects / platform / upstream / flac.git / blobdiff