#include "share/replaygain.h"
#include "share/gain_analysis.h"
#include "FLAC/assert.h"
-#include "FLAC/format.h"
+#include "FLAC/file_decoder.h"
+#include "FLAC/metadata.h"
+#include <stdio.h>
+#include <string.h>
#ifdef local_min
#undef local_min
#endif
#define local_min(a,b) ((a)<(b)?(a):(b))
+static const FLAC__byte *tag_title_gain_ = "REPLAYGAIN_TRACK_GAIN";
+static const FLAC__byte *tag_title_peak_ = "REPLAYGAIN_TRACK_PEAK";
+static const FLAC__byte *tag_album_gain_ = "REPLAYGAIN_ALBUM_GAIN";
+static const FLAC__byte *tag_album_peak_ = "REPLAYGAIN_ALBUM_PEAK";
+static const char *peak_format_ = "%s=%1.8f";
+static const char *gain_format_ = "%s=%+2.2f dB";
+
+static FLAC__bool append_tag_(FLAC__StreamMetadata *block, const char *format, const FLAC__byte *name, float value)
+{
+ char buffer[256];
+ FLAC__StreamMetadata_VorbisComment_Entry entry;
+
+ FLAC__ASSERT(0 != block);
+ FLAC__ASSERT(block->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
+ FLAC__ASSERT(0 != name);
+ FLAC__ASSERT(0 != value);
+
+ buffer[sizeof(buffer)-1] = '\0';
+ snprintf(buffer, sizeof(buffer)-1, format, name, value);
+
+ entry.entry = buffer;
+ entry.length = strlen(buffer);
+
+ return FLAC__metadata_object_vorbiscomment_insert_comment(block, block->data.vorbis_comment.num_comments, entry, /*copy=*/true);
+}
+
+REPLAYGAIN_API FLAC__bool FLAC__replaygain_is_valid_sample_frequency(unsigned sample_frequency)
+{
+ static const unsigned valid_sample_rates[] = {
+ 8000,
+ 11025,
+ 12000,
+ 16000,
+ 22050,
+ 24000,
+ 32000,
+ 44100,
+ 48000
+ };
+ static const unsigned n_valid_sample_rates = sizeof(valid_sample_rates) / sizeof(valid_sample_rates[0]);
+
+ unsigned i;
+
+ for(i = 0; i < n_valid_sample_rates; i++)
+ if(sample_frequency == valid_sample_rates[i])
+ return true;
+ return false;
+}
+
REPLAYGAIN_API FLAC__bool FLAC__replaygain_init(unsigned sample_frequency)
{
return InitGainAnalysis((long)sample_frequency) == INIT_GAIN_ANALYSIS_OK;
REPLAYGAIN_API FLAC__bool FLAC__replaygain_analyze(const FLAC__int32 * const input[], FLAC__bool is_stereo, unsigned bps, unsigned samples)
{
- static Float_t lbuffer[4096], rbuffer[4096];
+ /* using a small buffer improves data locality; we'd like it to fit easily in the dcache */
+ static Float_t lbuffer[2048], rbuffer[2048];
static const unsigned nbuffer = sizeof(lbuffer) / sizeof(lbuffer[0]);
- unsigned i;
+ unsigned i, j;
FLAC__ASSERT(bps >= 4 && bps <= 32);
FLAC__ASSERT(FLAC__MIN_BITS_PER_SAMPLE == 4);
if(bps == 16) {
if(is_stereo) {
+ j = 0;
while(samples > 0) {
const unsigned n = local_min(samples, nbuffer);
- for(i = 0; i < n; i++) {
- lbuffer[i] = (Float_t)input[0][i];
- rbuffer[i] = (Float_t)input[1][i];
+ for(i = 0; i < n; i++, j++) {
+ lbuffer[i] = (Float_t)input[0][j];
+ rbuffer[i] = (Float_t)input[1][j];
}
samples -= n;
if(AnalyzeSamples(lbuffer, rbuffer, n, 2) != GAIN_ANALYSIS_OK)
}
}
else {
+ j = 0;
while(samples > 0) {
const unsigned n = local_min(samples, nbuffer);
- for(i = 0; i < n; i++)
- lbuffer[i] = (Float_t)input[0][i];
+ for(i = 0; i < n; i++, j++)
+ lbuffer[i] = (Float_t)input[0][j];
samples -= n;
if(AnalyzeSamples(lbuffer, 0, n, 1) != GAIN_ANALYSIS_OK)
return false;
);
if(is_stereo) {
+ j = 0;
while(samples > 0) {
const unsigned n = local_min(samples, nbuffer);
- for(i = 0; i < n; i++) {
- lbuffer[i] = (Float_t)(scale * (double)input[0][i]);
- rbuffer[i] = (Float_t)(scale * (double)input[1][i]);
+ for(i = 0; i < n; i++, j++) {
+ lbuffer[i] = (Float_t)(scale * (double)input[0][j]);
+ rbuffer[i] = (Float_t)(scale * (double)input[1][j]);
}
samples -= n;
if(AnalyzeSamples(lbuffer, rbuffer, n, 2) != GAIN_ANALYSIS_OK)
}
}
else {
+ j = 0;
while(samples > 0) {
const unsigned n = local_min(samples, nbuffer);
- for(i = 0; i < n; i++)
- lbuffer[i] = (Float_t)(scale * (double)input[0][i]);
+ for(i = 0; i < n; i++, j++)
+ lbuffer[i] = (Float_t)(scale * (double)input[0][j]);
samples -= n;
if(AnalyzeSamples(lbuffer, 0, n, 1) != GAIN_ANALYSIS_OK)
return false;
REPLAYGAIN_API float FLAC__replaygain_get_album_gain()
{
- return GetAlbumGain();
+ return (float)GetAlbumGain();
}
REPLAYGAIN_API float FLAC__replaygain_get_title_gain()
{
- return GetTitleGain();
+ return (float)GetTitleGain();
+}
+
+
+typedef struct {
+ unsigned channels;
+ unsigned bits_per_sample;
+ unsigned sample_rate;
+ FLAC__int32 peak;
+ FLAC__bool error;
+} DecoderInstance;
+
+static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
+{
+ DecoderInstance *instance = (DecoderInstance*)client_data;
+ const unsigned bits_per_sample = frame->header.bits_per_sample;
+ const unsigned channels = frame->header.channels;
+ const unsigned sample_rate = frame->header.sample_rate;
+ const unsigned samples = frame->header.blocksize;
+ unsigned channel, sample;
+
+ (void)decoder;
+
+ if(
+ !instance->error &&
+ (channels == 2 || channels == 1) &&
+ bits_per_sample == instance->bits_per_sample &&
+ channels == instance->channels &&
+ sample_rate == instance->sample_rate
+ ) {
+ for(channel = 0; channel < channels; channel++)
+ for(sample = 0; sample < samples; sample++)
+ if(instance->peak < buffer[channel][sample])
+ instance->peak = buffer[channel][sample];
+
+ instance->error = !FLAC__replaygain_analyze(buffer, channels==2, bits_per_sample, samples);
+ }
+ else {
+ instance->error = true;
+ }
+
+ if(!instance->error)
+ return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+ else
+ return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
+}
+
+static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
+{
+ DecoderInstance *instance = (DecoderInstance*)client_data;
+
+ (void)decoder;
+
+ if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
+ instance->bits_per_sample = metadata->data.stream_info.bits_per_sample;
+ instance->channels = metadata->data.stream_info.channels;
+ instance->sample_rate = metadata->data.stream_info.sample_rate;
+
+ if(instance->channels != 1 && instance->channels != 2) {
+ instance->error = true;
+ return;
+ }
+
+ if(!FLAC__replaygain_is_valid_sample_frequency(instance->sample_rate)) {
+ instance->error = true;
+ return;
+ }
+ }
+}
+
+static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
+{
+ DecoderInstance *instance = (DecoderInstance*)client_data;
+
+ (void)decoder, (void)status;
+
+ instance->error = true;
+}
+
+REPLAYGAIN_API const char *FLAC__replaygain_analyze_file(const char *filename, float *title_gain, float *title_peak)
+{
+ DecoderInstance instance;
+ FLAC__FileDecoder *decoder = FLAC__file_decoder_new();
+
+ if(0 == decoder)
+ return "memory allocation error";
+
+ instance.peak = 0;
+ instance.error = false;
+
+ /* It does these three by default but lets be explicit: */
+ FLAC__file_decoder_set_md5_checking(decoder, false);
+ FLAC__file_decoder_set_metadata_ignore_all(decoder);
+ FLAC__file_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_STREAMINFO);
+
+ FLAC__file_decoder_set_filename(decoder, filename);
+ FLAC__file_decoder_set_write_callback(decoder, write_callback_);
+ FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_);
+ FLAC__file_decoder_set_error_callback(decoder, error_callback_);
+ FLAC__file_decoder_set_client_data(decoder, &instance);
+
+ if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK) {
+ FLAC__file_decoder_delete(decoder);
+ return "initializing decoder";
+ }
+
+ if(!FLAC__file_decoder_process_until_end_of_file(decoder) || instance.error) {
+ FLAC__file_decoder_delete(decoder);
+ return "decoding file";
+ }
+
+ FLAC__file_decoder_delete(decoder);
+
+ *title_gain = FLAC__replaygain_get_title_gain();
+ *title_peak = (double)instance.peak / (double)(1u << (instance.bits_per_sample-1));
+
+ return 0;
+}
+
+REPLAYGAIN_API const char *FLAC__replaygain_store_to_vorbiscomment(FLAC__StreamMetadata *block, float album_gain, float album_peak, float title_gain, float title_peak)
+{
+ FLAC__ASSERT(0 != block);
+ FLAC__ASSERT(block->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
+
+ if(
+ FLAC__metadata_object_vorbiscomment_remove_entries_matching(block, tag_title_gain_) < 0 ||
+ FLAC__metadata_object_vorbiscomment_remove_entries_matching(block, tag_title_peak_) < 0 ||
+ FLAC__metadata_object_vorbiscomment_remove_entries_matching(block, tag_album_gain_) < 0 ||
+ FLAC__metadata_object_vorbiscomment_remove_entries_matching(block, tag_album_peak_) < 0
+ )
+ return "memory allocation error";
+
+ if(
+ !append_tag_(block, peak_format_, tag_title_peak_, title_peak) ||
+ !append_tag_(block, gain_format_, tag_title_gain_, title_gain) ||
+ !append_tag_(block, peak_format_, tag_album_peak_, album_peak) ||
+ !append_tag_(block, gain_format_, tag_album_gain_, album_gain)
+ )
+ return "memory allocation error";
+
+ return 0;
+}
+
+REPLAYGAIN_API const char *FLAC__replaygain_store_to_file(const char *filename, float album_gain, float album_peak, float title_gain, float title_peak, FLAC__bool preserve_modtime)
+{
+ FLAC__Metadata_Chain *chain;
+ FLAC__Metadata_Iterator *iterator;
+ FLAC__StreamMetadata *block;
+ const char *error;
+ FLAC__bool found_vc_block = false;
+
+ if(0 == (chain = FLAC__metadata_chain_new()))
+ return "memory allocation error";
+
+ if(!FLAC__metadata_chain_read(chain, filename)) {
+ error = FLAC__Metadata_ChainStatusString[FLAC__metadata_chain_status(chain)];
+ FLAC__metadata_chain_delete(chain);
+ return error;
+ }
+
+ if(0 == (iterator = FLAC__metadata_iterator_new())) {
+ FLAC__metadata_chain_delete(chain);
+ return "memory allocation error";
+ }
+
+ FLAC__metadata_iterator_init(iterator, chain);
+
+ do {
+ block = FLAC__metadata_iterator_get_block(iterator);
+ if(block->type == FLAC__METADATA_TYPE_VORBIS_COMMENT)
+ found_vc_block = true;
+ } while(!found_vc_block && FLAC__metadata_iterator_next(iterator));
+
+ if(!found_vc_block) {
+ /* create a new block */
+ block = FLAC__metadata_object_new(FLAC__METADATA_TYPE_VORBIS_COMMENT);
+ if(0 == block) {
+ FLAC__metadata_chain_delete(chain);
+ FLAC__metadata_iterator_delete(iterator);
+ return "memory allocation error";
+ }
+ while(FLAC__metadata_iterator_next(iterator))
+ ;
+ if(!FLAC__metadata_iterator_insert_block_after(iterator, block)) {
+ error = FLAC__Metadata_ChainStatusString[FLAC__metadata_chain_status(chain)];
+ FLAC__metadata_chain_delete(chain);
+ FLAC__metadata_iterator_delete(iterator);
+ return error;
+ }
+ /* iterator is left pointing to new block */
+ FLAC__ASSERT(FLAC__metadata_iterator_get_block(iterator) == block);
+ }
+
+ FLAC__metadata_iterator_delete(iterator);
+
+ FLAC__ASSERT(0 != block);
+ FLAC__ASSERT(block->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
+
+ if(0 != (error = FLAC__replaygain_store_to_vorbiscomment(block, album_gain, album_peak, title_gain, title_peak))) {
+ FLAC__metadata_chain_delete(chain);
+ FLAC__metadata_iterator_delete(iterator);
+ return error;
+ }
+
+ FLAC__metadata_chain_sort_padding(chain);
+ if(!FLAC__metadata_chain_write(chain, /*use_padding=*/true, preserve_modtime)) {
+ FLAC__metadata_chain_delete(chain);
+ return FLAC__Metadata_ChainStatusString[FLAC__metadata_chain_status(chain)];
+ }
+
+ FLAC__metadata_chain_delete(chain);
+
+ return 0;
}
projects / platform / upstream / flac.git / commitdiff