5ddde0aac7
Having an array instead of individual variables allows the use of the replay_gain_mode enum as an array index.
324 lines
8.5 KiB
C
324 lines
8.5 KiB
C
/* the Music Player Daemon (MPD)
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* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
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* This project's homepage is: http://www.musicpd.org
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*
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* Common data structures and functions used by FLAC and OggFLAC
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* (c) 2005 by Eric Wong <normalperson@yhbt.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "_flac_common.h"
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#include "../log.h"
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#include <FLAC/format.h>
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#include <FLAC/metadata.h>
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void init_FlacData(FlacData * data, struct decoder * decoder,
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struct input_stream *inStream)
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{
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data->time = 0;
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data->position = 0;
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data->bitRate = 0;
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data->decoder = decoder;
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data->inStream = inStream;
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data->replayGainInfo = NULL;
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data->tag = NULL;
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}
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static int flacFindVorbisCommentFloat(const FLAC__StreamMetadata * block,
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const char *cmnt, float *fl)
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{
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int offset =
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FLAC__metadata_object_vorbiscomment_find_entry_from(block, 0, cmnt);
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if (offset >= 0) {
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size_t pos = strlen(cmnt) + 1; /* 1 is for '=' */
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int len = block->data.vorbis_comment.comments[offset].length
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- pos;
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if (len > 0) {
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unsigned char tmp;
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unsigned char *p = &(block->data.vorbis_comment.
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comments[offset].entry[pos]);
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tmp = p[len];
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p[len] = '\0';
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*fl = (float)atof((char *)p);
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p[len] = tmp;
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return 1;
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}
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}
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return 0;
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}
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/* replaygain stuff by AliasMrJones */
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static void flacParseReplayGain(const FLAC__StreamMetadata * block,
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FlacData * data)
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{
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int found = 0;
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if (data->replayGainInfo)
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replay_gain_info_free(data->replayGainInfo);
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data->replayGainInfo = replay_gain_info_new();
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found |= flacFindVorbisCommentFloat(block, "replaygain_album_gain",
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&data->replayGainInfo->tuples[REPLAY_GAIN_ALBUM].gain);
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found |= flacFindVorbisCommentFloat(block, "replaygain_album_peak",
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&data->replayGainInfo->tuples[REPLAY_GAIN_ALBUM].peak);
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found |= flacFindVorbisCommentFloat(block, "replaygain_track_gain",
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&data->replayGainInfo->tuples[REPLAY_GAIN_TRACK].gain);
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found |= flacFindVorbisCommentFloat(block, "replaygain_track_peak",
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&data->replayGainInfo->tuples[REPLAY_GAIN_TRACK].peak);
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if (!found) {
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replay_gain_info_free(data->replayGainInfo);
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data->replayGainInfo = NULL;
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}
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}
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/* tracknumber is used in VCs, MPD uses "track" ..., all the other
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* tag names match */
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static const char *VORBIS_COMMENT_TRACK_KEY = "tracknumber";
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static const char *VORBIS_COMMENT_DISC_KEY = "discnumber";
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static unsigned int commentMatchesAddToTag(const
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FLAC__StreamMetadata_VorbisComment_Entry
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* entry, unsigned int itemType,
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struct tag ** tag)
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{
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const char *str;
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size_t slen;
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int vlen;
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switch (itemType) {
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case TAG_ITEM_TRACK:
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str = VORBIS_COMMENT_TRACK_KEY;
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break;
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case TAG_ITEM_DISC:
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str = VORBIS_COMMENT_DISC_KEY;
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break;
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default:
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str = mpdTagItemKeys[itemType];
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}
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slen = strlen(str);
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vlen = entry->length - slen - 1;
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if ((vlen > 0) && (0 == strncasecmp(str, (char *)entry->entry, slen))
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&& (*(entry->entry + slen) == '=')) {
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if (!*tag)
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*tag = tag_new();
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tag_add_item_n(*tag, itemType,
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(char *)(entry->entry + slen + 1), vlen);
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return 1;
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}
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return 0;
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}
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struct tag *copyVorbisCommentBlockToMpdTag(const FLAC__StreamMetadata * block,
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struct tag * tag)
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{
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unsigned int i, j;
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FLAC__StreamMetadata_VorbisComment_Entry *comments;
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comments = block->data.vorbis_comment.comments;
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for (i = block->data.vorbis_comment.num_comments; i != 0; --i) {
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for (j = TAG_NUM_OF_ITEM_TYPES; j--;) {
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if (commentMatchesAddToTag(comments, j, &tag))
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break;
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}
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comments++;
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}
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return tag;
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}
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void flac_metadata_common_cb(const FLAC__StreamMetadata * block,
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FlacData * data)
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{
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const FLAC__StreamMetadata_StreamInfo *si = &(block->data.stream_info);
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switch (block->type) {
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case FLAC__METADATA_TYPE_STREAMINFO:
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data->audio_format.bits = (int8_t)si->bits_per_sample;
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data->audio_format.sample_rate = si->sample_rate;
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data->audio_format.channels = (int8_t)si->channels;
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data->total_time = ((float)si->total_samples) / (si->sample_rate);
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break;
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case FLAC__METADATA_TYPE_VORBIS_COMMENT:
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flacParseReplayGain(block, data);
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default:
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break;
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}
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}
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void flac_error_common_cb(const char *plugin,
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const FLAC__StreamDecoderErrorStatus status,
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mpd_unused FlacData * data)
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{
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if (decoder_get_command(data->decoder) == DECODE_COMMAND_STOP)
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return;
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switch (status) {
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case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC:
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ERROR("%s lost sync\n", plugin);
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break;
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case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER:
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ERROR("bad %s header\n", plugin);
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break;
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case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH:
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ERROR("%s crc mismatch\n", plugin);
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break;
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default:
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ERROR("unknown %s error\n", plugin);
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}
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}
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static void flac_convert_stereo16(int16_t *dest,
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const FLAC__int32 * const buf[],
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unsigned int position, unsigned int end)
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{
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for (; position < end; ++position) {
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*dest++ = buf[0][position];
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*dest++ = buf[1][position];
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}
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}
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static void
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flac_convert_16(int16_t *dest,
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unsigned int num_channels,
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const FLAC__int32 * const buf[],
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unsigned int position, unsigned int end)
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{
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unsigned int c_chan;
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for (; position < end; ++position)
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for (c_chan = 0; c_chan < num_channels; c_chan++)
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*dest++ = buf[c_chan][position];
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}
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/**
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* Note: this function also handles 24 bit files!
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*/
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static void
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flac_convert_32(int32_t *dest,
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unsigned int num_channels,
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const FLAC__int32 * const buf[],
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unsigned int position, unsigned int end)
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{
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unsigned int c_chan;
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for (; position < end; ++position)
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for (c_chan = 0; c_chan < num_channels; c_chan++)
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*dest++ = buf[c_chan][position];
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}
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static void
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flac_convert_8(int8_t *dest,
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unsigned int num_channels,
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const FLAC__int32 * const buf[],
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unsigned int position, unsigned int end)
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{
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unsigned int c_chan;
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for (; position < end; ++position)
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for (c_chan = 0; c_chan < num_channels; c_chan++)
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*dest++ = buf[c_chan][position];
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}
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static void flac_convert(unsigned char *dest,
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unsigned int num_channels,
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unsigned int bytes_per_sample,
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const FLAC__int32 * const buf[],
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unsigned int position, unsigned int end)
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{
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switch (bytes_per_sample) {
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case 2:
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if (num_channels == 2)
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flac_convert_stereo16((int16_t*)dest, buf,
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position, end);
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else
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flac_convert_16((int16_t*)dest, num_channels, buf,
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position, end);
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break;
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case 4:
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flac_convert_32((int32_t*)dest, num_channels, buf,
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position, end);
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break;
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case 1:
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flac_convert_8((int8_t*)dest, num_channels, buf,
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position, end);
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break;
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}
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}
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FLAC__StreamDecoderWriteStatus
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flac_common_write(FlacData *data, const FLAC__Frame * frame,
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const FLAC__int32 *const buf[])
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{
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unsigned int c_samp;
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const unsigned int num_channels = frame->header.channels;
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const unsigned int bytes_per_sample =
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audio_format_sample_size(&data->audio_format);
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const unsigned int bytes_per_channel =
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bytes_per_sample * frame->header.channels;
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const unsigned int max_samples = FLAC_CHUNK_SIZE / bytes_per_channel;
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unsigned int num_samples;
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enum decoder_command cmd;
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if (bytes_per_sample != 1 && bytes_per_sample != 2 &&
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bytes_per_sample != 4)
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/* exotic unsupported bit rate */
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return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
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for (c_samp = 0; c_samp < frame->header.blocksize;
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c_samp += num_samples) {
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num_samples = frame->header.blocksize - c_samp;
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if (num_samples > max_samples)
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num_samples = max_samples;
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flac_convert(data->chunk,
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num_channels, bytes_per_sample, buf,
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c_samp, c_samp + num_samples);
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cmd = decoder_data(data->decoder, data->inStream,
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data->chunk,
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num_samples * bytes_per_channel,
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data->time, data->bitRate,
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data->replayGainInfo);
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switch (cmd) {
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case DECODE_COMMAND_NONE:
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case DECODE_COMMAND_START:
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break;
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case DECODE_COMMAND_STOP:
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return
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FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
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case DECODE_COMMAND_SEEK:
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return
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FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
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}
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}
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return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
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}
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