Update to MPlayer SVN rev 29473 and FFmpeg SVN rev 19572.
[vaapi:athaifas-mplayer.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 &&
97         comment_size + FF_INPUT_BUFFER_PADDING_SIZE >= comment_size) {
98         char *comment = av_mallocz(comment_size + FF_INPUT_BUFFER_PADDING_SIZE);
99         if (get_buffer(pb, comment, comment_size) != comment_size) {
100             av_freep(&comment);
101             return AVERROR_IO;
102         }
103         av_metadata_set(&s->metadata, "comment", comment);
104         av_freep(&comment);
105     }
106
107     url_fskip(pb, header_size - SOX_FIXED_HDR - comment_size);
108
109     st->codec->sample_rate           = sample_rate;
110     st->codec->sample_fmt            = SAMPLE_FMT_S32;
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 };