X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/c57f1201efce928c25c7899cc0baab09845c9ba7..477b12ff719d3749b8d8f85035bd6384fee9be0d:/plugins/tracklength.c diff --git a/plugins/tracklength.c b/plugins/tracklength.c index c1b9cb9..7f0866e 100644 --- a/plugins/tracklength.c +++ b/plugins/tracklength.c @@ -1,193 +1,26 @@ /* * This file is part of DisOrder. - * Copyright (C) 2004, 2005, 2007 Richard Kettlewell + * Copyright (C) 2004, 2005, 2007, 2008, 2010 Richard Kettlewell * - * This program is free software; you can redistribute it and/or modify + * 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 + * the Free Software Foundation, either version 3 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. - * + * 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 + * along with this program. If not, see . */ - -#include - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include - -#include - -#include "madshim.h" -#include "wav.h" - -static void *mmap_file(const char *path, size_t *lengthp) { - int fd; - void *base; - struct stat sb; - - if((fd = open(path, O_RDONLY)) < 0) { - disorder_error(errno, "error opening %s", path); - return 0; - } - if(fstat(fd, &sb) < 0) { - disorder_error(errno, "error calling stat on %s", path); - goto error; - } - if(sb.st_size == 0) /* can't map 0-length files */ - goto error; - if((base = mmap(0, sb.st_size, PROT_READ, - MAP_SHARED, fd, 0)) == (void *)-1) { - disorder_error(errno, "error calling mmap on %s", path); - goto error; - } - *lengthp = sb.st_size; - close(fd); - return base; -error: - close(fd); - return 0; -} - -static long tl_mp3(const char *path) { - size_t length; - void *base; - buffer b; - - if(!(base = mmap_file(path, &length))) return -1; - b.duration = mad_timer_zero; - scan_mp3(base, length, &b); - munmap(base, length); - return b.duration.seconds + !!b.duration.fraction; -} - -static long tl_ogg(const char *path) { - OggVorbis_File vf; - FILE *fp = 0; - double length; - - if(!path) goto error; - if(!(fp = fopen(path, "rb"))) goto error; - if(ov_open(fp, &vf, 0, 0)) goto error; - fp = 0; - length = ov_time_total(&vf, -1); - ov_clear(&vf); - return ceil(length); -error: - if(fp) fclose(fp); - return -1; -} - -static long tl_wav(const char *path) { - struct wavfile f[1]; - int err, sample_frame_size; - long duration; - - if((err = wav_init(f, path))) { - disorder_error(err, "error opening %s", path); - return -1; - } - sample_frame_size = (f->bits + 7) / 8 * f->channels; - if(sample_frame_size) { - const long long n_samples = f->datasize / sample_frame_size; - duration = (n_samples + f->rate - 1) / f->rate; - } else - duration = -1; - wav_destroy(f); - return duration; -} - -/* libFLAC's "simplified" interface is rather heavyweight... */ - -struct flac_state { - long duration; - const char *path; -}; - -static void flac_metadata(const FLAC__FileDecoder attribute((unused)) *decoder, - const FLAC__StreamMetadata *metadata, - void *client_data) { - struct flac_state *const state = client_data; - const FLAC__StreamMetadata_StreamInfo *const stream_info - = &metadata->data.stream_info; - - if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) - /* FLAC uses 0 to mean unknown and conveniently so do we */ - state->duration = (stream_info->total_samples - + stream_info->sample_rate - 1) - / stream_info->sample_rate; -} - -static void flac_error(const FLAC__FileDecoder attribute((unused)) *decoder, - FLAC__StreamDecoderErrorStatus status, - void *client_data) { - const struct flac_state *const state = client_data; - - disorder_error(0, "error decoding %s: %s", state->path, - FLAC__StreamDecoderErrorStatusString[status]); -} - -static FLAC__StreamDecoderWriteStatus flac_write - (const FLAC__FileDecoder attribute((unused)) *decoder, - const FLAC__Frame attribute((unused)) *frame, - const FLAC__int32 attribute((unused)) *const buffer_[], - void attribute((unused)) *client_data) { - const struct flac_state *const state = client_data; - - if(state->duration >= 0) - return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; - else - return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE; -} - -static long tl_flac(const char *path) { - FLAC__FileDecoder *fd = 0; - FLAC__FileDecoderState fs; - struct flac_state state[1]; - - state->duration = -1; /* error */ - state->path = path; - if(!(fd = FLAC__file_decoder_new())) { - disorder_error(0, "FLAC__file_decoder_new failed"); - goto fail; - } - if(!(FLAC__file_decoder_set_filename(fd, path))) { - disorder_error(0, "FLAC__file_set_filename failed"); - goto fail; - } - FLAC__file_decoder_set_metadata_callback(fd, flac_metadata); - FLAC__file_decoder_set_error_callback(fd, flac_error); - FLAC__file_decoder_set_write_callback(fd, flac_write); - FLAC__file_decoder_set_client_data(fd, state); - if((fs = FLAC__file_decoder_init(fd))) { - disorder_error(0, "FLAC__file_decoder_init: %s", - FLAC__FileDecoderStateString[fs]); - goto fail; - } - FLAC__file_decoder_process_until_end_of_metadata(fd); -fail: - if(fd) - FLAC__file_decoder_delete(fd); - return state->duration; -} +/** @file plugins/tracklength.c + * @brief Plugin to compute track lengths + * + * Currently implements MP3, OGG, FLAC and WAV. + */ +#include "tracklength.h" static const struct { const char *ext;