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; } }