yading@11: /* yading@11: * SoX native format demuxer yading@11: * Copyright (c) 2009 Daniel Verkamp yading@11: * yading@11: * Based on libSoX sox-fmt.c yading@11: * Copyright (c) 2008 robs@users.sourceforge.net yading@11: * yading@11: * This file is part of FFmpeg. yading@11: * yading@11: * FFmpeg is free software; you can redistribute it and/or yading@11: * modify it under the terms of the GNU Lesser General Public yading@11: * License as published by the Free Software Foundation; either yading@11: * version 2.1 of the License, or (at your option) any later version. yading@11: * yading@11: * FFmpeg is distributed in the hope that it will be useful, yading@11: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@11: * Lesser General Public License for more details. yading@11: * yading@11: * You should have received a copy of the GNU Lesser General Public yading@11: * License along with FFmpeg; if not, write to the Free Software yading@11: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@11: */ yading@11: yading@11: /** yading@11: * @file yading@11: * SoX native format demuxer yading@11: * @author Daniel Verkamp yading@11: * @see http://wiki.multimedia.cx/index.php?title=SoX_native_intermediate_format yading@11: */ yading@11: yading@11: #include "libavutil/intreadwrite.h" yading@11: #include "libavutil/intfloat.h" yading@11: #include "libavutil/dict.h" yading@11: #include "avformat.h" yading@11: #include "internal.h" yading@11: #include "pcm.h" yading@11: #include "sox.h" yading@11: yading@11: static int sox_probe(AVProbeData *p) yading@11: { yading@11: if (AV_RL32(p->buf) == SOX_TAG || AV_RB32(p->buf) == SOX_TAG) yading@11: return AVPROBE_SCORE_MAX; yading@11: return 0; yading@11: } yading@11: yading@11: static int sox_read_header(AVFormatContext *s) yading@11: { yading@11: AVIOContext *pb = s->pb; yading@11: unsigned header_size, comment_size; yading@11: double sample_rate, sample_rate_frac; yading@11: AVStream *st; yading@11: yading@11: st = avformat_new_stream(s, NULL); yading@11: if (!st) yading@11: return AVERROR(ENOMEM); yading@11: yading@11: st->codec->codec_type = AVMEDIA_TYPE_AUDIO; yading@11: yading@11: if (avio_rl32(pb) == SOX_TAG) { yading@11: st->codec->codec_id = AV_CODEC_ID_PCM_S32LE; yading@11: header_size = avio_rl32(pb); yading@11: avio_skip(pb, 8); /* sample count */ yading@11: sample_rate = av_int2double(avio_rl64(pb)); yading@11: st->codec->channels = avio_rl32(pb); yading@11: comment_size = avio_rl32(pb); yading@11: } else { yading@11: st->codec->codec_id = AV_CODEC_ID_PCM_S32BE; yading@11: header_size = avio_rb32(pb); yading@11: avio_skip(pb, 8); /* sample count */ yading@11: sample_rate = av_int2double(avio_rb64(pb)); yading@11: st->codec->channels = avio_rb32(pb); yading@11: comment_size = avio_rb32(pb); yading@11: } yading@11: yading@11: if (comment_size > 0xFFFFFFFFU - SOX_FIXED_HDR - 4U) { yading@11: av_log(s, AV_LOG_ERROR, "invalid comment size (%u)\n", comment_size); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: yading@11: if (sample_rate <= 0 || sample_rate > INT_MAX) { yading@11: av_log(s, AV_LOG_ERROR, "invalid sample rate (%f)\n", sample_rate); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: yading@11: sample_rate_frac = sample_rate - floor(sample_rate); yading@11: if (sample_rate_frac) yading@11: av_log(s, AV_LOG_WARNING, yading@11: "truncating fractional part of sample rate (%f)\n", yading@11: sample_rate_frac); yading@11: yading@11: if ((header_size + 4) & 7 || header_size < SOX_FIXED_HDR + comment_size yading@11: || st->codec->channels > 65535) /* Reserve top 16 bits */ { yading@11: av_log(s, AV_LOG_ERROR, "invalid header\n"); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: yading@11: if (comment_size && comment_size < UINT_MAX) { yading@11: char *comment = av_malloc(comment_size+1); yading@11: if(!comment) yading@11: return AVERROR(ENOMEM); yading@11: if (avio_read(pb, comment, comment_size) != comment_size) { yading@11: av_freep(&comment); yading@11: return AVERROR(EIO); yading@11: } yading@11: comment[comment_size] = 0; yading@11: yading@11: av_dict_set(&s->metadata, "comment", comment, yading@11: AV_DICT_DONT_STRDUP_VAL); yading@11: } yading@11: yading@11: avio_skip(pb, header_size - SOX_FIXED_HDR - comment_size); yading@11: yading@11: st->codec->sample_rate = sample_rate; yading@11: st->codec->bits_per_coded_sample = 32; yading@11: st->codec->bit_rate = st->codec->sample_rate * yading@11: st->codec->bits_per_coded_sample * yading@11: st->codec->channels; yading@11: st->codec->block_align = st->codec->bits_per_coded_sample * yading@11: st->codec->channels / 8; yading@11: yading@11: avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: AVInputFormat ff_sox_demuxer = { yading@11: .name = "sox", yading@11: .long_name = NULL_IF_CONFIG_SMALL("SoX native"), yading@11: .read_probe = sox_probe, yading@11: .read_header = sox_read_header, yading@11: .read_packet = ff_pcm_read_packet, yading@11: .read_seek = ff_pcm_read_seek, yading@11: };