FLAC__bool FLAC_plugin__decoder_init(FLAC__FileDecoder *decoder, const char *filename, FLAC__int64 filesize, file_info_struct *file_info, output_config_t *config)
{
FLAC__ASSERT(decoder);
FLAC_plugin__decoder_finish(decoder);
/* init decoder */
FLAC__file_decoder_set_md5_checking(decoder, false);
FLAC__file_decoder_set_filename(decoder, filename);
FLAC__file_decoder_set_metadata_ignore_all(decoder);
FLAC__file_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_STREAMINFO);
FLAC__file_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_VORBIS_COMMENT);
FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback);
FLAC__file_decoder_set_write_callback(decoder, write_callback);
FLAC__file_decoder_set_error_callback(decoder, error_callback);
FLAC__file_decoder_set_client_data(decoder, file_info);
if (FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK)
{
FLAC_plugin__show_error("Error while initializing decoder (%s).", FLAC__FileDecoderStateString[FLAC__file_decoder_get_state(decoder)]);
return false;
}
/* process */
cfg = *config;
wide_samples_in_reservoir_ = 0;
file_info->is_playing = false;
file_info->abort_flag = false;
file_info->has_replaygain = false;
if (!FLAC__file_decoder_process_until_end_of_metadata(decoder))
{
FLAC_plugin__show_error("Error while processing metadata (%s).", FLAC__FileDecoderStateString[FLAC__file_decoder_get_state(decoder)]);
return false;
}
/* check results */
if (file_info->abort_flag) return false; /* metadata callback already popped up the error dialog */
/* init replaygain */
file_info->output_bits_per_sample = file_info->has_replaygain && cfg.replaygain.enable ?
cfg.resolution.replaygain.bps_out :
cfg.resolution.normal.dither_24_to_16 ? min(file_info->bits_per_sample, 16) : file_info->bits_per_sample;
if (file_info->has_replaygain && cfg.replaygain.enable && cfg.resolution.replaygain.dither)
FLAC__replaygain_synthesis__init_dither_context(&file_info->dither_context, file_info->bits_per_sample, cfg.resolution.replaygain.noise_shaping);
/* more inits */
file_info->eof = false;
file_info->seek_to = -1;
file_info->is_playing = true;
file_info->average_bps = (unsigned)(filesize / (125.*file_info->total_samples/file_info->sample_rate));
bh_index_last_w = 0;
bh_index_last_o = BITRATE_HIST_SIZE;
decode_position = 0;
decode_position_last = 0;
written_time_last = 0;
return true;
}
static 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_STREAMINFO)
{
FLAC__ASSERT(metadata->data.stream_info.total_samples < 0x100000000); /* this plugin can only handle < 4 gigasamples */
file_info->total_samples = (unsigned)(metadata->data.stream_info.total_samples&0xfffffffful);
file_info->bits_per_sample = metadata->data.stream_info.bits_per_sample;
file_info->channels = metadata->data.stream_info.channels;
file_info->sample_rate = metadata->data.stream_info.sample_rate;
if (file_info->bits_per_sample!=8 && file_info->bits_per_sample!=16 && file_info->bits_per_sample!=24)
{
FLAC_plugin__show_error("This plugin can only handle 8/16/24-bit samples.");
file_info->abort_flag = true;
return;
}
file_info->length_in_msec = (unsigned)((double)file_info->total_samples / (double)file_info->sample_rate * 1000.0 + 0.5);
}
else if (metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT)
{
double gain, peak;
if (grabbag__replaygain_load_from_vorbiscomment(metadata, cfg.replaygain.album_mode, &gain, &peak))
{
file_info->has_replaygain = true;
file_info->replay_scale = grabbag__replaygain_compute_scale_factor(peak, gain, (double)cfg.replaygain.preamp, !cfg.replaygain.hard_limit);
}
}
}
static void stop()
{
if (thread_handle)
{
stream_data_.is_playing = false;
if (WaitForSingleObject(thread_handle, 2000) == WAIT_TIMEOUT)
{
FLAC_plugin__show_error("Error while stopping decoding thread.");
TerminateThread(thread_handle, 0);
}
CloseHandle(thread_handle);
thread_handle = NULL;
}
FLAC_plugin__decoder_finish(decoder_);
mod_.outMod->Close();
mod_.SAVSADeInit();
}
static void metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
{
stream_data_struct *stream_data = (stream_data_struct*)client_data;
(void)decoder;
if (metadata->type == FLAC__METADATA_TYPE_STREAMINFO)
{
stream_data->total_samples = metadata->data.stream_info.total_samples;
stream_data->bits_per_sample = metadata->data.stream_info.bits_per_sample;
stream_data->channels = metadata->data.stream_info.channels;
stream_data->sample_rate = metadata->data.stream_info.sample_rate;
if (stream_data->bits_per_sample!=8 && stream_data->bits_per_sample!=16 && stream_data->bits_per_sample!=24)
{
FLAC_plugin__show_error("This plugin can only handle 8/16/24-bit samples.");
stream_data->abort_flag = true;
return;
}
{
/* with VC++ you have to spoon feed it the casting from uint64->int64->double */
FLAC__uint64 l = (FLAC__uint64)((double)(FLAC__int64)stream_data->total_samples / (double)stream_data->sample_rate * 1000.0 + 0.5);
if (l > INT_MAX)
l = INT_MAX;
stream_data->length_in_msec = (int)l;
}
}
else if (metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT)
{
double reference, gain, peak;
if (grabbag__replaygain_load_from_vorbiscomment(metadata, cfg.replaygain.album_mode, /*strict=*/false, &reference, &gain, &peak))
{
stream_data->has_replaygain = true;
stream_data->replay_scale = grabbag__replaygain_compute_scale_factor(peak, gain, (double)cfg.replaygain.preamp, !cfg.replaygain.hard_limit);
}
}
}
unsigned FLAC_plugin__decode(FLAC__StreamDecoder *decoder, stream_data_struct *stream_data, char *sample_buffer)
{
/* fill reservoir */
while (wide_samples_in_reservoir_ < SAMPLES_PER_WRITE)
{
if (FLAC__stream_decoder_get_state(decoder) == FLAC__STREAM_DECODER_END_OF_STREAM)
{
stream_data->eof = true;
break;
}
else if (!FLAC__stream_decoder_process_single(decoder))
{
FLAC_plugin__show_error("Error while processing frame (%s).", FLAC__stream_decoder_get_resolved_state_string(decoder));
stream_data->eof = true;
break;
}
if (!FLAC__stream_decoder_get_decode_position(decoder, &decode_position))
decode_position = 0;
}
/* output samples */
if (wide_samples_in_reservoir_ > 0)
{
const unsigned n = min(wide_samples_in_reservoir_, SAMPLES_PER_WRITE);
const unsigned channels = stream_data->channels;
unsigned i;
int bytes;
if (cfg.replaygain.enable && stream_data->has_replaygain)
{
bytes = FLAC__replaygain_synthesis__apply_gain(
sample_buffer,
true, /* little_endian_data_out */
stream_data->output_bits_per_sample == 8, /* unsigned_data_out */
reservoir__,
n,
channels,
stream_data->bits_per_sample,
stream_data->output_bits_per_sample,
stream_data->replay_scale,
cfg.replaygain.hard_limit,
cfg.resolution.replaygain.dither,
&stream_data->dither_context
);
}
else
{
bytes = FLAC__plugin_common__pack_pcm_signed_little_endian(
sample_buffer,
reservoir__,
n,
channels,
stream_data->bits_per_sample,
stream_data->output_bits_per_sample
);
}
wide_samples_in_reservoir_ -= n;
for (i = 0; i < channels; i++)
memmove(&reservoir_[i][0], &reservoir_[i][n], sizeof(reservoir_[0][0]) * wide_samples_in_reservoir_);
return bytes;
}
else
{
stream_data->eof = true;
return 0;
}
}
