diff options
Diffstat (limited to 'src/inputPlugins/_flac_common.c')
| -rw-r--r-- | src/inputPlugins/_flac_common.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/inputPlugins/_flac_common.c b/src/inputPlugins/_flac_common.c new file mode 100644 index 000000000..f6a470ed2 --- /dev/null +++ b/src/inputPlugins/_flac_common.c @@ -0,0 +1,195 @@ +/* the Music Player Daemon (MPD) + * (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu) + * 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 "../inputPlugin.h" + +#if defined(HAVE_FLAC) || defined(HAVE_OGGFLAC) + +#include "_flac_common.h" + +#include "../log.h" +#include "../tag.h" +#include "../inputStream.h" +#include "../outputBuffer.h" +#include "../decode.h" +#include "../replayGain.h" + +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <FLAC/format.h> +#include <FLAC/metadata.h> + +void init_FlacData (FlacData * data, OutputBuffer * cb, + DecoderControl * dc, InputStream * inStream) +{ + data->chunk_length = 0; + data->time = 0; + data->position = 0; + data->bitRate = 0; + data->cb = cb; + data->dc = dc; + data->inStream = inStream; + data->replayGainInfo = NULL; + data->tag = NULL; +} + +static int flacFindVorbisCommentFloat(const FLAC__StreamMetadata * block, + 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 * dup = &(block->data.vorbis_comment. + comments[offset].entry[pos]); + tmp = dup[len]; + dup[len] = '\0'; + *fl = atof((char *)dup); + dup[len] = tmp; + + return 1; + } + } + + return 0; +} + +/* replaygain stuff by AliasMrJones */ +static void flacParseReplayGain(const FLAC__StreamMetadata *block, + FlacData * data) { + unsigned 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 unsigned int commentMatchesAddToTag( + const FLAC__StreamMetadata_VorbisComment_Entry * entry, + unsigned int itemType, + MpdTag ** tag) +{ + const char * str = (itemType == TAG_ITEM_TRACK) ? + VORBIS_COMMENT_TRACK_KEY : mpdTagItemKeys[itemType]; + size_t slen = strlen(str); + int 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) +{ + DecoderControl *dc = data->dc; + const FLAC__StreamMetadata_StreamInfo *si = &(block->data.stream_info); + + switch(block->type) { + case FLAC__METADATA_TYPE_STREAMINFO: + dc->audioFormat.bits = si->bits_per_sample; + dc->audioFormat.sampleRate = si->sample_rate; + dc->audioFormat.channels = si->channels; + dc->totalTime = ((float)si->total_samples) / (si->sample_rate); + getOutputAudioFormat(&(dc->audioFormat), + &(data->cb->audioFormat)); + break; + case FLAC__METADATA_TYPE_VORBIS_COMMENT: + flacParseReplayGain(block,data); + default: + break; + } +} + +void flac_error_common_cb( const char * plugin, + const FLAC__StreamDecoderErrorStatus status, + FlacData *data) +{ + if(data->dc->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 */ |