Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavformat / rsd.c
1 /*
2 * RSD demuxer
3 * Copyright (c) 2013 James Almer
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavcodec/bytestream.h"
23 #include "libavutil/intreadwrite.h"
24 #include "avformat.h"
25 #include "avio.h"
26 #include "internal.h"
27
28 static const AVCodecTag rsd_tags[] = {
29 { AV_CODEC_ID_ADPCM_THP, MKTAG('G','A','D','P') },
30 { AV_CODEC_ID_ADPCM_IMA_RAD, MKTAG('R','A','D','P') },
31 { AV_CODEC_ID_PCM_S16BE, MKTAG('P','C','M','B') },
32 { AV_CODEC_ID_PCM_S16LE, MKTAG('P','C','M',' ') },
33 { AV_CODEC_ID_NONE, 0 },
34 };
35
36 static const uint32_t rsd_unsupported_tags[] = {
37 MKTAG('O','G','G',' '),
38 MKTAG('V','A','G',' '),
39 MKTAG('W','A','D','P'),
40 MKTAG('X','A','D','P'),
41 MKTAG('X','M','A',' '),
42 };
43
44 static int rsd_probe(AVProbeData *p)
45 {
46 if (memcmp(p->buf, "RSD", 3) || p->buf[3] - '0' < 2 || p->buf[3] - '0' > 6)
47 return 0;
48 if (AV_RL32(p->buf + 8) > 256 || !AV_RL32(p->buf + 8))
49 return AVPROBE_SCORE_MAX / 8;
50 if (AV_RL32(p->buf + 16) > 8*48000 || !AV_RL32(p->buf + 16))
51 return AVPROBE_SCORE_MAX / 8;
52 return AVPROBE_SCORE_MAX;
53 }
54
55 static int rsd_read_header(AVFormatContext *s)
56 {
57 AVIOContext *pb = s->pb;
58 int i, version, start = 0x800;
59 AVCodecContext *codec;
60 AVStream *st = avformat_new_stream(s, NULL);
61
62 if (!st)
63 return AVERROR(ENOMEM);
64
65 avio_skip(pb, 3); // "RSD"
66 version = avio_r8(pb) - '0';
67
68 codec = st->codec;
69 codec->codec_type = AVMEDIA_TYPE_AUDIO;
70 codec->codec_tag = avio_rl32(pb);
71 codec->codec_id = ff_codec_get_id(rsd_tags, codec->codec_tag);
72 if (!codec->codec_id) {
73 char tag_buf[32];
74
75 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), codec->codec_tag);
76 for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) {
77 if (codec->codec_tag == rsd_unsupported_tags[i]) {
78 avpriv_request_sample(s, "Codec tag: %s", tag_buf);
79 return AVERROR_PATCHWELCOME;
80 }
81 }
82 av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf);
83 return AVERROR_INVALIDDATA;
84 }
85
86 codec->channels = avio_rl32(pb);
87 if (!codec->channels)
88 return AVERROR_INVALIDDATA;
89
90 avio_skip(pb, 4); // Bit depth
91 codec->sample_rate = avio_rl32(pb);
92 if (!codec->sample_rate)
93 return AVERROR_INVALIDDATA;
94
95 avio_skip(pb, 4); // Unknown
96
97 switch (codec->codec_id) {
98 case AV_CODEC_ID_ADPCM_IMA_RAD:
99 codec->block_align = 20 * codec->channels;
100 if (pb->seekable)
101 st->duration = av_get_audio_frame_duration(codec, avio_size(pb) - start);
102 break;
103 case AV_CODEC_ID_ADPCM_THP:
104 /* RSD3GADP is mono, so only alloc enough memory
105 to store the coeff table for a single channel. */
106
107 start = avio_rl32(pb);
108
109 if (ff_get_extradata(codec, s->pb, 32) < 0)
110 return AVERROR(ENOMEM);
111
112 for (i = 0; i < 16; i++)
113 AV_WB16(codec->extradata + i * 2, AV_RL16(codec->extradata + i * 2));
114
115 if (pb->seekable)
116 st->duration = (avio_size(pb) - start) / 8 * 14;
117 break;
118 case AV_CODEC_ID_PCM_S16LE:
119 case AV_CODEC_ID_PCM_S16BE:
120 if (version != 4)
121 start = avio_rl32(pb);
122
123 if (pb->seekable)
124 st->duration = (avio_size(pb) - start) / 2 / codec->channels;
125 break;
126 }
127
128 avio_skip(pb, start - avio_tell(pb));
129
130 avpriv_set_pts_info(st, 64, 1, codec->sample_rate);
131
132 return 0;
133 }
134
135 static int rsd_read_packet(AVFormatContext *s, AVPacket *pkt)
136 {
137 AVCodecContext *codec = s->streams[0]->codec;
138 int ret, size = 1024;
139
140 if (avio_feof(s->pb))
141 return AVERROR_EOF;
142
143 if (codec->codec_id == AV_CODEC_ID_ADPCM_IMA_RAD)
144 ret = av_get_packet(s->pb, pkt, codec->block_align);
145 else
146 ret = av_get_packet(s->pb, pkt, size);
147
148 if (ret != size) {
149 if (ret < 0) {
150 av_free_packet(pkt);
151 return ret;
152 }
153 av_shrink_packet(pkt, ret);
154 }
155 pkt->stream_index = 0;
156
157 return ret;
158 }
159
160 AVInputFormat ff_rsd_demuxer = {
161 .name = "rsd",
162 .long_name = NULL_IF_CONFIG_SMALL("GameCube RSD"),
163 .read_probe = rsd_probe,
164 .read_header = rsd_read_header,
165 .read_packet = rsd_read_packet,
166 .extensions = "rsd",
167 .codec_tag = (const AVCodecTag* const []){rsd_tags, 0},
168 };