lavc/libkvazaar: fix incompatible pointer type.
[ffmpeg.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  * @file
27  * SoX native format demuxer
28  * @author Daniel Verkamp
29  * @see http://wiki.multimedia.cx/index.php?title=SoX_native_intermediate_format
30  */
31
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/intfloat.h"
34 #include "libavutil/dict.h"
35 #include "avformat.h"
36 #include "internal.h"
37 #include "pcm.h"
38 #include "sox.h"
39
40 static int sox_probe(AVProbeData *p)
41 {
42     if (AV_RL32(p->buf) == SOX_TAG || AV_RB32(p->buf) == SOX_TAG)
43         return AVPROBE_SCORE_MAX;
44     return 0;
45 }
46
47 static int sox_read_header(AVFormatContext *s)
48 {
49     AVIOContext *pb = s->pb;
50     unsigned header_size, comment_size;
51     double sample_rate, sample_rate_frac;
52     AVStream *st;
53
54     st = avformat_new_stream(s, NULL);
55     if (!st)
56         return AVERROR(ENOMEM);
57
58     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
59
60     if (avio_rl32(pb) == SOX_TAG) {
61         st->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE;
62         header_size         = avio_rl32(pb);
63         avio_skip(pb, 8); /* sample count */
64         sample_rate         = av_int2double(avio_rl64(pb));
65         st->codecpar->channels = avio_rl32(pb);
66         comment_size        = avio_rl32(pb);
67     } else {
68         st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE;
69         header_size         = avio_rb32(pb);
70         avio_skip(pb, 8); /* sample count */
71         sample_rate         = av_int2double(avio_rb64(pb));
72         st->codecpar->channels = avio_rb32(pb);
73         comment_size        = avio_rb32(pb);
74     }
75
76     if (comment_size > 0xFFFFFFFFU - SOX_FIXED_HDR - 4U) {
77         av_log(s, AV_LOG_ERROR, "invalid comment size (%u)\n", comment_size);
78         return AVERROR_INVALIDDATA;
79     }
80
81     if (sample_rate <= 0 || sample_rate > INT_MAX) {
82         av_log(s, AV_LOG_ERROR, "invalid sample rate (%f)\n", sample_rate);
83         return AVERROR_INVALIDDATA;
84     }
85
86     sample_rate_frac = sample_rate - floor(sample_rate);
87     if (sample_rate_frac)
88         av_log(s, AV_LOG_WARNING,
89                "truncating fractional part of sample rate (%f)\n",
90                sample_rate_frac);
91
92     if ((header_size + 4) & 7 || header_size < SOX_FIXED_HDR + comment_size
93         || st->codecpar->channels > 65535) /* Reserve top 16 bits */ {
94         av_log(s, AV_LOG_ERROR, "invalid header\n");
95         return AVERROR_INVALIDDATA;
96     }
97
98     if (comment_size && comment_size < UINT_MAX) {
99         char *comment = av_malloc(comment_size+1);
100         if(!comment)
101             return AVERROR(ENOMEM);
102         if (avio_read(pb, comment, comment_size) != comment_size) {
103             av_freep(&comment);
104             return AVERROR(EIO);
105         }
106         comment[comment_size] = 0;
107
108         av_dict_set(&s->metadata, "comment", comment,
109                                AV_DICT_DONT_STRDUP_VAL);
110     }
111
112     avio_skip(pb, header_size - SOX_FIXED_HDR - comment_size);
113
114     st->codecpar->sample_rate           = sample_rate;
115     st->codecpar->bits_per_coded_sample = 32;
116     st->codecpar->bit_rate              = (int64_t)st->codecpar->sample_rate *
117                                           st->codecpar->bits_per_coded_sample *
118                                           st->codecpar->channels;
119     st->codecpar->block_align           = st->codecpar->bits_per_coded_sample *
120                                           st->codecpar->channels / 8;
121
122     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
123
124     return 0;
125 }
126
127 AVInputFormat ff_sox_demuxer = {
128     .name           = "sox",
129     .long_name      = NULL_IF_CONFIG_SMALL("SoX native"),
130     .read_probe     = sox_probe,
131     .read_header    = sox_read_header,
132     .read_packet    = ff_pcm_read_packet,
133     .read_seek      = ff_pcm_read_seek,
134 };