Replace all the occurrences of AVERROR_EIO with AVERROR(EIO), and mark
[libav.git] / libavformat / soxdec.c
1 /*
2 * SoX native format demuxer
3 * Copyright (c) 2009 Daniel Verkamp <daniel@drv.nu>
4 *
5 * Based on libSoX sox-fmt.c
6 * Copyright (c) 2008 robs@users.sourceforge.net
7 *
8 * This file is part of FFmpeg.
9 *
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.
14 *
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.
19 *
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
23 */
24
25 /**
26 * SoX native format demuxer
27 * @file libavformat/soxdec.c
28 * @author Daniel Verkamp
29 * @sa http://wiki.multimedia.cx/index.php?title=SoX_native_intermediate_format
30 */
31
32 #include "libavutil/intreadwrite.h"
33 #include "avformat.h"
34 #include "raw.h"
35 #include "sox.h"
36
37 static int sox_probe(AVProbeData *p)
38 {
39 if (AV_RL32(p->buf) == SOX_TAG || AV_RB32(p->buf) == SOX_TAG)
40 return AVPROBE_SCORE_MAX;
41 return 0;
42 }
43
44 static int sox_read_header(AVFormatContext *s,
45 AVFormatParameters *ap)
46 {
47 ByteIOContext *pb = s->pb;
48 unsigned header_size, comment_size;
49 double sample_rate, sample_rate_frac;
50 AVStream *st;
51
52 st = av_new_stream(s, 0);
53 if (!st)
54 return AVERROR(ENOMEM);
55
56 st->codec->codec_type = CODEC_TYPE_AUDIO;
57
58 if (get_le32(pb) == SOX_TAG) {
59 st->codec->codec_id = CODEC_ID_PCM_S32LE;
60 header_size = get_le32(pb);
61 url_fskip(pb, 8); /* sample count */
62 sample_rate = av_int2dbl(get_le64(pb));
63 st->codec->channels = get_le32(pb);
64 comment_size = get_le32(pb);
65 } else {
66 st->codec->codec_id = CODEC_ID_PCM_S32BE;
67 header_size = get_be32(pb);
68 url_fskip(pb, 8); /* sample count */
69 sample_rate = av_int2dbl(get_be64(pb));
70 st->codec->channels = get_be32(pb);
71 comment_size = get_be32(pb);
72 }
73
74 if (comment_size > 0xFFFFFFFFU - SOX_FIXED_HDR - 4U) {
75 av_log(s, AV_LOG_ERROR, "invalid comment size (%u)\n", comment_size);
76 return -1;
77 }
78
79 if (sample_rate <= 0 || sample_rate > INT_MAX) {
80 av_log(s, AV_LOG_ERROR, "invalid sample rate (%f)\n", sample_rate);
81 return -1;
82 }
83
84 sample_rate_frac = sample_rate - floor(sample_rate);
85 if (sample_rate_frac)
86 av_log(s, AV_LOG_WARNING,
87 "truncating fractional part of sample rate (%f)\n",
88 sample_rate_frac);
89
90 if ((header_size + 4) & 7 || header_size < SOX_FIXED_HDR + comment_size
91 || st->codec->channels > 65535) /* Reserve top 16 bits */ {
92 av_log(s, AV_LOG_ERROR, "invalid header\n");
93 return -1;
94 }
95
96 if (comment_size && comment_size < UINT_MAX) {
97 char *comment = av_malloc(comment_size+1);
98 if (get_buffer(pb, comment, comment_size) != comment_size) {
99 av_freep(&comment);
100 return AVERROR(EIO);
101 }
102 comment[comment_size] = 0;
103
104 av_metadata_set2(&s->metadata, "comment", comment,
105 AV_METADATA_DONT_STRDUP_VAL);
106 }
107
108 url_fskip(pb, header_size - SOX_FIXED_HDR - comment_size);
109
110 st->codec->sample_rate = sample_rate;
111 st->codec->bits_per_coded_sample = 32;
112 st->codec->bit_rate = st->codec->sample_rate *
113 st->codec->bits_per_coded_sample *
114 st->codec->channels;
115 st->codec->block_align = st->codec->bits_per_coded_sample *
116 st->codec->channels / 8;
117
118 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
119
120 return 0;
121 }
122
123 #define SOX_SAMPLES 1024
124
125 static int sox_read_packet(AVFormatContext *s,
126 AVPacket *pkt)
127 {
128 int ret, size;
129
130 if (url_feof(s->pb))
131 return AVERROR_EOF;
132
133 size = SOX_SAMPLES*s->streams[0]->codec->block_align;
134 ret = av_get_packet(s->pb, pkt, size);
135 if (ret < 0)
136 return AVERROR(EIO);
137 pkt->stream_index = 0;
138 pkt->size = ret;
139
140 return 0;
141 }
142
143 AVInputFormat sox_demuxer = {
144 "sox",
145 NULL_IF_CONFIG_SMALL("SoX native format"),
146 0,
147 sox_probe,
148 sox_read_header,
149 sox_read_packet,
150 NULL,
151 pcm_read_seek,
152 };