/* the Music Player Daemon (MPD) * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com) * This project's homepage is: http://www.musicpd.org * * Common data structures and functions used by FLAC and OggFLAC * (c) 2005 by Eric Wong <normalperson@yhbt.net> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "../decoder_api.h" #if defined(HAVE_FLAC) || defined(HAVE_OGGFLAC) #include "_flac_common.h" #include "../log.h" #include <FLAC/format.h> #include <FLAC/metadata.h> void init_FlacData(FlacData * data, struct decoder * decoder, InputStream * inStream) { data->chunk_length = 0; data->time = 0; data->position = 0; data->bitRate = 0; data->decoder = decoder; data->inStream = inStream; data->replayGainInfo = NULL; data->tag = NULL; } static int flacFindVorbisCommentFloat(const FLAC__StreamMetadata * block, const char *cmnt, float *fl) { int offset = FLAC__metadata_object_vorbiscomment_find_entry_from(block, 0, cmnt); if (offset >= 0) { size_t pos = strlen(cmnt) + 1; /* 1 is for '=' */ int len = block->data.vorbis_comment.comments[offset].length - pos; if (len > 0) { unsigned char tmp; unsigned char *p = &(block->data.vorbis_comment. comments[offset].entry[pos]); tmp = p[len]; p[len] = '\0'; *fl = (float)atof((char *)p); p[len] = tmp; return 1; } } return 0; } /* replaygain stuff by AliasMrJones */ static void flacParseReplayGain(const FLAC__StreamMetadata * block, FlacData * data) { int found = 0; if (data->replayGainInfo) freeReplayGainInfo(data->replayGainInfo); data->replayGainInfo = newReplayGainInfo(); found |= flacFindVorbisCommentFloat(block, "replaygain_album_gain", &data->replayGainInfo->albumGain); found |= flacFindVorbisCommentFloat(block, "replaygain_album_peak", &data->replayGainInfo->albumPeak); found |= flacFindVorbisCommentFloat(block, "replaygain_track_gain", &data->replayGainInfo->trackGain); found |= flacFindVorbisCommentFloat(block, "replaygain_track_peak", &data->replayGainInfo->trackPeak); if (!found) { freeReplayGainInfo(data->replayGainInfo); data->replayGainInfo = NULL; } } /* tracknumber is used in VCs, MPD uses "track" ..., all the other * tag names match */ static const char *VORBIS_COMMENT_TRACK_KEY = "tracknumber"; static const char *VORBIS_COMMENT_DISC_KEY = "discnumber"; static unsigned int commentMatchesAddToTag(const FLAC__StreamMetadata_VorbisComment_Entry * entry, unsigned int itemType, MpdTag ** tag) { const char *str; size_t slen; int vlen; switch (itemType) { case TAG_ITEM_TRACK: str = VORBIS_COMMENT_TRACK_KEY; break; case TAG_ITEM_DISC: str = VORBIS_COMMENT_DISC_KEY; break; default: str = mpdTagItemKeys[itemType]; } slen = strlen(str); vlen = entry->length - slen - 1; if ((vlen > 0) && (0 == strncasecmp(str, (char *)entry->entry, slen)) && (*(entry->entry + slen) == '=')) { if (!*tag) *tag = newMpdTag(); addItemToMpdTagWithLen(*tag, itemType, (char *)(entry->entry + slen + 1), vlen); return 1; } return 0; } MpdTag *copyVorbisCommentBlockToMpdTag(const FLAC__StreamMetadata * block, MpdTag * tag) { unsigned int i, j; FLAC__StreamMetadata_VorbisComment_Entry *comments; comments = block->data.vorbis_comment.comments; for (i = block->data.vorbis_comment.num_comments; i != 0; --i) { for (j = TAG_NUM_OF_ITEM_TYPES; j--;) { if (commentMatchesAddToTag(comments, j, &tag)) break; } comments++; } return tag; } void flac_metadata_common_cb(const FLAC__StreamMetadata * block, FlacData * data) { const FLAC__StreamMetadata_StreamInfo *si = &(block->data.stream_info); switch (block->type) { case FLAC__METADATA_TYPE_STREAMINFO: data->audio_format.bits = (mpd_sint8)si->bits_per_sample; data->audio_format.sampleRate = si->sample_rate; data->audio_format.channels = (mpd_sint8)si->channels; data->total_time = ((float)si->total_samples) / (si->sample_rate); break; case FLAC__METADATA_TYPE_VORBIS_COMMENT: flacParseReplayGain(block, data); default: break; } } void flac_error_common_cb(const char *plugin, const FLAC__StreamDecoderErrorStatus status, mpd_unused FlacData * data) { if (decoder_get_command(data->decoder) == DECODE_COMMAND_STOP) return; switch (status) { case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC: ERROR("%s lost sync\n", plugin); break; case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER: ERROR("bad %s header\n", plugin); break; case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH: ERROR("%s crc mismatch\n", plugin); break; default: ERROR("unknown %s error\n", plugin); } } #endif /* HAVE_FLAC || HAVE_OGGFLAC */