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path: root/libavformat/rsd.c (plain)
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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
28static const AVCodecTag rsd_tags[] = {
29 { AV_CODEC_ID_ADPCM_PSX, MKTAG('V','A','G',' ') },
30 { AV_CODEC_ID_ADPCM_THP_LE, MKTAG('G','A','D','P') },
31 { AV_CODEC_ID_ADPCM_THP, MKTAG('W','A','D','P') },
32 { AV_CODEC_ID_ADPCM_IMA_RAD, MKTAG('R','A','D','P') },
33 { AV_CODEC_ID_ADPCM_IMA_WAV, MKTAG('X','A','D','P') },
34 { AV_CODEC_ID_PCM_S16BE, MKTAG('P','C','M','B') },
35 { AV_CODEC_ID_PCM_S16LE, MKTAG('P','C','M',' ') },
36 { AV_CODEC_ID_XMA2, MKTAG('X','M','A',' ') },
37 { AV_CODEC_ID_NONE, 0 },
38};
39
40static const uint32_t rsd_unsupported_tags[] = {
41 MKTAG('O','G','G',' '),
42};
43
44static 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
55static int rsd_read_header(AVFormatContext *s)
56{
57 AVIOContext *pb = s->pb;
58 int i, ret, version, start = 0x800;
59 AVCodecParameters *par;
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 par = st->codecpar;
69 par->codec_type = AVMEDIA_TYPE_AUDIO;
70 par->codec_tag = avio_rl32(pb);
71 par->codec_id = ff_codec_get_id(rsd_tags, par->codec_tag);
72 if (!par->codec_id) {
73 const char *tag_buf = av_fourcc2str(par->codec_tag);
74 for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) {
75 if (par->codec_tag == rsd_unsupported_tags[i]) {
76 avpriv_request_sample(s, "Codec tag: %s", tag_buf);
77 return AVERROR_PATCHWELCOME;
78 }
79 }
80 av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf);
81 return AVERROR_INVALIDDATA;
82 }
83
84 par->channels = avio_rl32(pb);
85 if (par->channels <= 0 || par->channels > INT_MAX / 36) {
86 av_log(s, AV_LOG_ERROR, "Invalid number of channels: %d\n", par->channels);
87 return AVERROR_INVALIDDATA;
88 }
89
90 avio_skip(pb, 4); // Bit depth
91 par->sample_rate = avio_rl32(pb);
92 if (!par->sample_rate)
93 return AVERROR_INVALIDDATA;
94
95 avio_skip(pb, 4); // Unknown
96
97 switch (par->codec_id) {
98 case AV_CODEC_ID_XMA2:
99 par->block_align = 2048;
100 ff_alloc_extradata(par, 34);
101 if (!par->extradata)
102 return AVERROR(ENOMEM);
103 memset(par->extradata, 0, 34);
104 break;
105 case AV_CODEC_ID_ADPCM_PSX:
106 par->block_align = 16 * par->channels;
107 if (pb->seekable & AVIO_SEEKABLE_NORMAL)
108 st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
109 break;
110 case AV_CODEC_ID_ADPCM_IMA_RAD:
111 par->block_align = 20 * par->channels;
112 if (pb->seekable & AVIO_SEEKABLE_NORMAL)
113 st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
114 break;
115 case AV_CODEC_ID_ADPCM_IMA_WAV:
116 if (version == 2)
117 start = avio_rl32(pb);
118
119 par->bits_per_coded_sample = 4;
120 par->block_align = 36 * par->channels;
121 if (pb->seekable & AVIO_SEEKABLE_NORMAL)
122 st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
123 break;
124 case AV_CODEC_ID_ADPCM_THP_LE:
125 /* RSD3GADP is mono, so only alloc enough memory
126 to store the coeff table for a single channel. */
127
128 start = avio_rl32(pb);
129
130 if ((ret = ff_get_extradata(s, par, s->pb, 32)) < 0)
131 return ret;
132 if (pb->seekable & AVIO_SEEKABLE_NORMAL)
133 st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
134 break;
135 case AV_CODEC_ID_ADPCM_THP:
136 par->block_align = 8 * par->channels;
137 avio_skip(s->pb, 0x1A4 - avio_tell(s->pb));
138
139 if ((ret = ff_alloc_extradata(st->codecpar, 32 * par->channels)) < 0)
140 return ret;
141
142 for (i = 0; i < par->channels; i++) {
143 avio_read(s->pb, st->codecpar->extradata + 32 * i, 32);
144 avio_skip(s->pb, 8);
145 }
146 if (pb->seekable & AVIO_SEEKABLE_NORMAL)
147 st->duration = (avio_size(pb) - start) / (8 * par->channels) * 14;
148 break;
149 case AV_CODEC_ID_PCM_S16LE:
150 case AV_CODEC_ID_PCM_S16BE:
151 if (version != 4)
152 start = avio_rl32(pb);
153
154 if (pb->seekable & AVIO_SEEKABLE_NORMAL)
155 st->duration = (avio_size(pb) - start) / 2 / par->channels;
156 break;
157 }
158
159 avio_skip(pb, start - avio_tell(pb));
160 if (par->codec_id == AV_CODEC_ID_XMA2) {
161 avio_skip(pb, avio_rb32(pb) + avio_rb32(pb));
162 st->duration = avio_rb32(pb);
163 }
164
165 avpriv_set_pts_info(st, 64, 1, par->sample_rate);
166
167 return 0;
168}
169
170static int rsd_read_packet(AVFormatContext *s, AVPacket *pkt)
171{
172 AVCodecParameters *par = s->streams[0]->codecpar;
173 int ret, size = 1024;
174 int64_t pos;
175
176 if (avio_feof(s->pb))
177 return AVERROR_EOF;
178
179 pos = avio_tell(s->pb);
180 if (par->codec_id == AV_CODEC_ID_ADPCM_IMA_RAD ||
181 par->codec_id == AV_CODEC_ID_ADPCM_PSX ||
182 par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV ||
183 par->codec_id == AV_CODEC_ID_XMA2) {
184 ret = av_get_packet(s->pb, pkt, par->block_align);
185 } else if (par->codec_tag == MKTAG('W','A','D','P') &&
186 par->channels > 1) {
187 int i, ch;
188
189 ret = av_new_packet(pkt, par->block_align);
190 if (ret < 0)
191 return ret;
192 for (i = 0; i < 4; i++) {
193 for (ch = 0; ch < par->channels; ch++) {
194 pkt->data[ch * 8 + i * 2 + 0] = avio_r8(s->pb);
195 pkt->data[ch * 8 + i * 2 + 1] = avio_r8(s->pb);
196 }
197 }
198 ret = 0;
199 } else {
200 ret = av_get_packet(s->pb, pkt, size);
201 }
202
203 if (par->codec_id == AV_CODEC_ID_XMA2 && pkt->size >= 1)
204 pkt->duration = (pkt->data[0] >> 2) * 512;
205
206 pkt->pos = pos;
207 pkt->stream_index = 0;
208
209 return ret;
210}
211
212AVInputFormat ff_rsd_demuxer = {
213 .name = "rsd",
214 .long_name = NULL_IF_CONFIG_SMALL("GameCube RSD"),
215 .read_probe = rsd_probe,
216 .read_header = rsd_read_header,
217 .read_packet = rsd_read_packet,
218 .extensions = "rsd",
219 .codec_tag = (const AVCodecTag* const []){rsd_tags, 0},
220 .flags = AVFMT_GENERIC_INDEX,
221};
222
generated by cgit at 2024-05-17 03:05:56 (GMT)