2 * SoX native format demuxer
3 * Copyright (c) 2009 Daniel Verkamp <daniel@drv.nu>
5 * Based on libSoX sox-fmt.c
6 * Copyright (c) 2008 robs@users.sourceforge.net
8 * This file is part of FFmpeg.
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 * SoX native format demuxer
28 * @author Daniel Verkamp
29 * @see http://wiki.multimedia.cx/index.php?title=SoX_native_intermediate_format
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/intfloat.h"
34 #include "libavutil/dict.h"
40 static int sox_probe(AVProbeData *p)
42 if (AV_RL32(p->buf) == SOX_TAG || AV_RB32(p->buf) == SOX_TAG)
43 return AVPROBE_SCORE_MAX;
47 static int sox_read_header(AVFormatContext *s,
48 AVFormatParameters *ap)
50 AVIOContext *pb = s->pb;
51 unsigned header_size, comment_size;
52 double sample_rate, sample_rate_frac;
55 st = avformat_new_stream(s, NULL);
57 return AVERROR(ENOMEM);
59 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
61 if (avio_rl32(pb) == SOX_TAG) {
62 st->codec->codec_id = CODEC_ID_PCM_S32LE;
63 header_size = avio_rl32(pb);
64 avio_skip(pb, 8); /* sample count */
65 sample_rate = av_int2double(avio_rl64(pb));
66 st->codec->channels = avio_rl32(pb);
67 comment_size = avio_rl32(pb);
69 st->codec->codec_id = CODEC_ID_PCM_S32BE;
70 header_size = avio_rb32(pb);
71 avio_skip(pb, 8); /* sample count */
72 sample_rate = av_int2double(avio_rb64(pb));
73 st->codec->channels = avio_rb32(pb);
74 comment_size = avio_rb32(pb);
77 if (comment_size > 0xFFFFFFFFU - SOX_FIXED_HDR - 4U) {
78 av_log(s, AV_LOG_ERROR, "invalid comment size (%u)\n", comment_size);
82 if (sample_rate <= 0 || sample_rate > INT_MAX) {
83 av_log(s, AV_LOG_ERROR, "invalid sample rate (%f)\n", sample_rate);
87 sample_rate_frac = sample_rate - floor(sample_rate);
89 av_log(s, AV_LOG_WARNING,
90 "truncating fractional part of sample rate (%f)\n",
93 if ((header_size + 4) & 7 || header_size < SOX_FIXED_HDR + comment_size
94 || st->codec->channels > 65535) /* Reserve top 16 bits */ {
95 av_log(s, AV_LOG_ERROR, "invalid header\n");
99 if (comment_size && comment_size < UINT_MAX) {
100 char *comment = av_malloc(comment_size+1);
102 return AVERROR(ENOMEM);
103 if (avio_read(pb, comment, comment_size) != comment_size) {
107 comment[comment_size] = 0;
109 av_dict_set(&s->metadata, "comment", comment,
110 AV_DICT_DONT_STRDUP_VAL);
113 avio_skip(pb, header_size - SOX_FIXED_HDR - comment_size);
115 st->codec->sample_rate = sample_rate;
116 st->codec->bits_per_coded_sample = 32;
117 st->codec->bit_rate = st->codec->sample_rate *
118 st->codec->bits_per_coded_sample *
120 st->codec->block_align = st->codec->bits_per_coded_sample *
121 st->codec->channels / 8;
123 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
128 #define SOX_SAMPLES 1024
130 static int sox_read_packet(AVFormatContext *s,
138 size = SOX_SAMPLES*s->streams[0]->codec->block_align;
139 ret = av_get_packet(s->pb, pkt, size);
142 pkt->stream_index = 0;
148 AVInputFormat ff_sox_demuxer = {
150 .long_name = NULL_IF_CONFIG_SMALL("SoX native format"),
151 .read_probe = sox_probe,
152 .read_header = sox_read_header,
153 .read_packet = sox_read_packet,
154 .read_seek = pcm_read_seek,