-/* in_flac - Winamp3 FLAC input plugin
* Copyright (C) 2001 Josh Coalson
*
* This program is free software; you can redistribute it and/or
#include <windows.h>
#include <stdio.h>
#include "core_api.h"
+#include "FLAC/all.h"
+
+typedef struct {
+ byte raw[128];
+ char title[31];
+ char artist[31];
+ char album[31];
+ char comment[31];
+ unsigned year;
+ unsigned track; /* may be 0 if v1 (not v1.1) tag */
+ unsigned genre;
+ char description[1024]; /* the formatted description passed to xmms */
+} id3v1_struct;
+
+typedef struct {
+ bool abort_flag;
+ bool is_playing;
+ bool eof;
+ unsigned total_samples;
+ unsigned bits_per_sample;
+ unsigned channels;
+ unsigned sample_rate;
+ unsigned length_in_msec;
+} file_info_struct;
+
+static bool get_id3v1_tag_(const char *filename, id3v1_struct *tag);
+static bool decoder_init_(const char *filename);
+static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data);
+static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
+static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
static char plugin_description_[] = "Reference FLAC Player v" FLAC__VERSION_STRING;
static HINSTANCE g_hDllInstance_;
class FLAC_Info : public WInputInfo
{
private:
- char title[MAX_PATH], infostr[MAX_PATH];
- int length_in_ms;
+ id3v1_struct tag_;
+ int length_in_msec_;
public:
FLAC_Info();
~FLAC_Info();
int Open(char *url);
void GetTitle(char *buf, int maxlen);
void GetInfoString(char *buf, int maxlen);
- inline int GetLength(void) { return length_in_ms; }
+ inline int GetLength(void) { return length_in_msec_; }
};
FLAC_Info::FLAC_Info() : WInputInfo()
{
- infostr[0] = title[0] = 0;
- length_in_ms = -1;
+ length_in_msec_ = -1;
}
FLAC_Info::~FLAC_Info()
int FLAC_Info::Open(char *url)
{
- char *p=url+strlen(url);
- while (*p != '\\' && p >= url) p--;
- strcpy(title, ++p);
+ const char *filename = url; /* @@@ right now we only handle files */
- HANDLE hFile;
- length_in_ms = -1;
- hFile = CreateFile(url, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
- if (hFile != INVALID_HANDLE_VALUE) {
- length_in_ms = (GetFileSize(hFile, NULL)*10)/(SAMPLERATE/100*NCH*(BPS/8));
+ (void)get_id3v1_tag_(filename, &tag_);
+
+ file_info_struct tmp_file_info;
+ FLAC__FileDecoder *tmp_decoder = FLAC__file_decoder_get_new_instance();
+ if(0 == tmp_decoder) {
+ length_in_msec_ = -1;
+ return 1;
}
- CloseHandle(hFile);
+ tmp_file_info.abort_flag = false;
+ tmp_decoder->check_md5 = false; /* turn off MD5 checking in the decoder */
+ if(FLAC__file_decoder_init(tmp_decoder, filename, write_callback_, metadata_callback_, error_callback_, &tmp_file_info) != FLAC__FILE_DECODER_OK) {
+ length_in_msec_ = -1;
+ return 1;
+ }
+ if(!FLAC__file_decoder_process_metadata(tmp_decoder)) {
+ length_in_msec_ = -1;
+ return 1;
+ }
+
+ length_in_msec_ = (int)tmp_file_info.length_in_msec;
+
+ if(tmp_decoder->state != FLAC__FILE_DECODER_UNINITIALIZED)
+ FLAC__file_decoder_finish(tmp_decoder);
+ FLAC__file_decoder_free_instance(tmp_decoder);
+
return 0;
}
void FLAC_Info::GetTitle(char *buf, int maxlen)
{
strncpy(buf, title, maxlen-1);
- buf[maxlen-1]=0;
+ buf[maxlen-1] = 0;
}
void FLAC_Info::GetInfoString(char *buf, int maxlen)
{
- strncpy(buf, infostr, maxlen-1);
- buf[maxlen-1]=0;
+ strncpy(buf, description, maxlen-1);
+ buf[maxlen-1] = 0;
}
class FLAC_Source : public WInputSource
{
private:
- char title[MAX_PATH], infostr[MAX_PATH];
- int length_in_ms;
- HANDLE input_file;
+ id3v1_struct tag_;
+ FLAC__FileDecoder *decoder_;
+ int16 reservoir_[FLAC__MAX_BLOCK_SIZE * 2 * 2]; /* *2 for max channels, another *2 for overflow */
+ unsigned reservoir_samples_;
+ file_info_struct file_info_;
+ bool audio_error_;
public:
FLAC_Source();
~FLAC_Source();
int SetPosition(int); // sets position in ms
void GetTitle(char *buf, int maxlen);
void GetInfoString(char *buf, int maxlen);
- inline int GetLength(void) { return -1; }
+ inline int GetLength(void) { return (int)file_info_.length_in_msec; }
+ void cleanup();
};
-void FLAC_Source::GetTitle(char *buf, int maxlen)
+FLAC_Source::FLAC_Source() : WInputSource()
{
- strncpy(buf, title, maxlen-1);
- buf[maxlen-1] = 0;
+ decoder_ = FLAC__file_decoder_get_new_instance();
+ file_info_.length_in_msec = -1;
+ audio_error_ = false;
}
-void FLAC_Source::GetInfoString(char *buf, int maxlen)
+FLAC_Source::~FLAC_Source()
{
- strncpy(buf, infostr, maxlen-1);
- buf[maxlen-1] = 0;
+ if(decoder_)
+ FLAC__file_decoder_free_instance(decoder_);
}
-FLAC_Source::FLAC_Source() : WInputSource()
+void FLAC_Source::GetTitle(char *buf, int maxlen)
{
- infostr[0] = title[0] = 0;
- length_in_ms = -1;
- input_file = NULL;
+ strncpy(buf, title, maxlen-1);
+ buf[maxlen-1] = 0;
}
-FLAC_Source::~FLAC_Source()
+void FLAC_Source::GetInfoString(char *buf, int maxlen)
{
- if(input_file)
- CloseHandle(input_file);
+ strncpy(buf, description, maxlen-1);
+ buf[maxlen-1] = 0;
}
int FLAC_Source::Open(char *url, bool *killswitch)
{
- char *p = url+strlen(url);
- while (*p != '\\' && p >= url) p--;
- strcpy(title, ++p);
+ const char *filename = url; /* @@@ right now we only handle files */
+
+ {
+ FILE *f = fopen(filename, "r");
+ if(0 == f)
+ return 1;
+ fclose(f);
+ }
+
+ (void)get_id3v1_tag_(filename, &tag);
- length_in_ms = -1;
- input_file = CreateFile(url, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
- if (input_file == INVALID_HANDLE_VALUE) return 1;
+ file_info_.length_in_msec = -1;
+
+ if(!decoder_init_(filename))
+ return 1;
+
+ if(file_info_.abort_flag) {
+ cleanup();
+ return 1;
+ }
+
+ reservoir_samples_ = 0;
+ audio_error_ = false;
+ file_info_.is_playing = true;
+ file_info_.eof = false;
- length_in_ms = (GetFileSize(input_file, NULL)*10)/(SAMPLERATE/100*NCH*(BPS/8));
return 0;
}
int FLAC_Source::GetSamples(char *sample_buffer, int bytes, int *bps, int *nch, int *srate, bool *killswitch)
{
- *srate = SAMPLERATE;
- *bps = BPS;
- *nch = NCH;
+ int return_bytes = 0;
+
+ *bps = (int)file_info_.bits_per_sample;
+ *nch = (int)file_info_.channels;
+ *srate = (int)file_info_.sample_rate;
+
+ if(!file_info_.eof) {
+ const unsigned channels = file_info_.channels;
+ const unsigned bytes_per_sample = (file_info_.bits_per_sample+7) / 8;
+ const unsigned wide_samples = bytes / channels / bytes_per_sample;
+if(bytes&0x3)fprintf(stderr,"@@@ Got odd buffer size request\n");
+ while(reservoir_samples_ < wide_samples) {
+ if(decoder->state == FLAC__FILE_DECODER_END_OF_FILE) {
+ file_info_.eof = true;
+ break;
+ }
+ else if(!FLAC__file_decoder_process_one_frame(decoder_))
+ break;
+ }
+ if(reservoir_samples_ > 0) {
+ unsigned i, n = min(reservoir_samples_, wide_samples), delta;
+ int16 output = (int16*)sample_buffer;
- unsigned long l;
- ReadFile(input_file, sample_buffer, bytes, &l, NULL);
+ for(i = 0; i < n*channels; i++)
+ output[i] = reservoir_[i];
+ delta = i;
+ for( ; i < reservoir_samples_*channels; i++)
+ reservoir[i-delta] = reservoir[i];
+ reservoir_samples_ -= n;
- return l;
+ return_bytes = (int)(n * bytes_per_sample * channels);
+ }
+ else {
+ file_info_.eof = true;
+ }
+ }
+ return return_bytes;
}
int FLAC_Source::SetPosition(int position)
{
- return 1; // seeking not possible
+ const double distance = (double)position * 1000.0 / (double)file_info_.length_in_msec;
+ unsigned target_sample = (unsigned)(distance * (double)file_info_.total_samples);
+ if(FLAC__file_decoder_seek_absolute(decoder_, (uint64)target_sample)) {
+ file_info_.eof = false;
+ reservoir_samples_ = 0;
+ return 0;
+ }
+ else {
+ return 1;
+ }
+}
+
+void FLAC_Source::cleanup()
+{
+ if(decoder_ && decoder_->state != FLAC__FILE_DECODER_UNINITIALIZED)
+ FLAC__file_decoder_finish(decoder_);
+
+ reservoir_samples_ = 0;
+ audio_error_ = false;
+ file_info_.is_playing = false;
+ file_info_.eof = false;
+ file_info_.length_in_msec = -1;
}
* local routines
**********************************************************************/
+bool get_id3v1_tag_(const char *filename, id3v1_struct *tag)
+{
+ const char *temp;
+ FILE *f = fopen(filename, "rb");
+ memset(tag, 0, sizeof(id3v1_struct));
+
+ /* set the title and description to the filename by default */
+ temp = strrchr(filename, '/');
+ if(!temp)
+ temp = filename;
+ else
+ temp++;
+ strcpy(tag->description, temp);
+ *strrchr(tag->description, '.') = '\0';
+ strncpy(tag->title, tag->description, 30); tag->title[30] = '\0';
+
+ if(0 == f)
+ return false;
+ if(-1 == fseek(f, -128, SEEK_END)) {
+ fclose(f);
+ return false;
+ }
+ if(fread(tag->raw, 1, 128, f) < 128) {
+ fclose(f);
+ return false;
+ }
+ fclose(f);
+ if(strncmp(tag->raw, "TAG", 3))
+ return false;
+ else {
+ char year_str[5];
+
+ memcpy(tag->title, tag->raw+3, 30);
+ memcpy(tag->artist, tag->raw+33, 30);
+ memcpy(tag->album, tag->raw+63, 30);
+ memcpy(year_str, tag->raw+93, 4); year_str[4] = '\0'; tag->year = atoi(year_str);
+ memcpy(tag->comment, tag->raw+97, 30);
+ tag->genre = (unsigned)((byte)tag->raw[127]);
+ tag->track = (unsigned)((byte)tag->raw[126]);
+
+ sprintf(tag->description, "%s - %s", tag->artist, tag->title);
+
+ return true;
+ }
+}
+
+bool decoder_init_(const char *filename)
+{
+ if(decoder_ == 0)
+ return false;
+
+ decoder_->check_md5 = false; /* turn off MD5 checking in the decoder */
+
+ if(FLAC__file_decoder_init(decoder_, filename, write_callback_, metadata_callback_, error_callback_, &file_info_) != FLAC__FILE_DECODER_OK)
+ return false;
+
+ file_info_.abort_flag = false;
+
+ if(!FLAC__file_decoder_process_metadata(decoder_))
+ return false;
+
+ return true;
+}
+
+FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data)
+{
+ file_info_struct *file_info = (file_info_struct *)client_data;
+ const unsigned bps = file_info->bits_per_sample, channels = file_info->channels, wide_samples = frame->header.blocksize;
+ unsigned wide_sample, sample, channel;
+
+ (void)decoder;
+
+ if(file_info->abort_flag)
+ return FLAC__STREAM_DECODER_WRITE_ABORT;
+
+ assert(bps == 16);
+
+ for(sample = reservoir_samples_*channels, wide_sample = 0; wide_sample < wide_samples; wide_sample++)
+ for(channel = 0; channel < channels; channel++, sample++)
+ reservoir_[sample] = (int16)buffer[channel][wide_sample];
+
+ reservoir_samples_ += wide_samples;
+
+ return FLAC__STREAM_DECODER_WRITE_CONTINUE;
+}
+
+void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
+{
+ file_info_struct *file_info = (file_info_struct *)client_data;
+ (void)decoder;
+ if(metadata->type == FLAC__METADATA_TYPE_ENCODING) {
+ assert(metadata->data.encoding.total_samples < 0x100000000); /* this plugin can only handle < 4 gigasamples */
+ file_info->total_samples = (unsigned)(metadata->data.encoding.total_samples&0xffffffff);
+ file_info->bits_per_sample = metadata->data.encoding.bits_per_sample;
+ file_info->channels = metadata->data.encoding.channels;
+ file_info->sample_rate = metadata->data.encoding.sample_rate;
+
+ if(file_info->bits_per_sample != 16) {
+ file_info->abort_flag = true;
+ return;
+ }
+ file_info->length_in_msec = file_info->total_samples * 10 / (file_info->sample_rate / 100);
+ }
+}
+
+void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
+{
+ file_info_struct *file_info = (file_info_struct *)client_data;
+ (void)decoder;
+ if(status != FLAC__STREAM_DECODER_ERROR_LOST_SYNC)
+ file_info->abort_flag = true;
+}
/***********************************************************************
projects / platform / upstream / flac.git / commitdiff