3 * Copyright (c) 2013 James Almer
5 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavcodec/bytestream.h"
23 #include "libavutil/intreadwrite.h"
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 },
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',' '),
44 static int rsd_probe(AVProbeData *p)
46 if (!memcmp(p->buf, "RSD", 3) &&
47 p->buf[3] - '0' >= 2 && p->buf[3] - '0' <= 6)
48 return AVPROBE_SCORE_EXTENSION;
52 static int rsd_read_header(AVFormatContext *s)
54 AVIOContext *pb = s->pb;
55 int i, version, start = 0x800;
56 AVCodecContext *codec;
57 AVStream *st = avformat_new_stream(s, NULL);
60 return AVERROR(ENOMEM);
62 avio_skip(pb, 3); // "RSD"
63 version = avio_r8(pb) - '0';
66 codec->codec_type = AVMEDIA_TYPE_AUDIO;
67 codec->codec_tag = avio_rl32(pb);
68 codec->codec_id = ff_codec_get_id(rsd_tags, codec->codec_tag);
69 if (!codec->codec_id) {
72 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), codec->codec_tag);
73 for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) {
74 if (codec->codec_tag == rsd_unsupported_tags[i]) {
75 avpriv_request_sample(s, "Codec tag: %s", tag_buf);
76 return AVERROR_PATCHWELCOME;
79 av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf);
80 return AVERROR_INVALIDDATA;
83 codec->channels = avio_rl32(pb);
85 return AVERROR_INVALIDDATA;
87 avio_skip(pb, 4); // Bit depth
88 codec->sample_rate = avio_rl32(pb);
89 if (!codec->sample_rate)
90 return AVERROR_INVALIDDATA;
92 avio_skip(pb, 4); // Unknown
94 switch (codec->codec_id) {
95 case AV_CODEC_ID_ADPCM_IMA_RAD:
96 codec->block_align = 20 * codec->channels;
98 st->duration = av_get_audio_frame_duration(codec, avio_size(pb) - start);
100 case AV_CODEC_ID_ADPCM_THP:
101 /* RSD3GADP is mono, so only alloc enough memory
102 to store the coeff table for a single channel. */
104 codec->extradata_size = 32;
105 codec->extradata = av_malloc(codec->extradata_size);
106 if (!codec->extradata)
107 return AVERROR(ENOMEM);
109 start = avio_rl32(pb);
111 if (avio_read(s->pb, codec->extradata, 32) != 32)
112 return AVERROR_INVALIDDATA;
114 for (i = 0; i < 16; i++)
115 AV_WB16(codec->extradata + i * 2, AV_RL16(codec->extradata + i * 2));
118 st->duration = (avio_size(pb) - start) / 8 * 14;
120 case AV_CODEC_ID_PCM_S16LE:
121 case AV_CODEC_ID_PCM_S16BE:
123 start = avio_rl32(pb);
126 st->duration = (avio_size(pb) - start) / 2 / codec->channels;
130 avio_skip(pb, start - avio_tell(pb));
132 avpriv_set_pts_info(st, 64, 1, codec->sample_rate);
137 static int rsd_read_packet(AVFormatContext *s, AVPacket *pkt)
139 AVCodecContext *codec = s->streams[0]->codec;
140 int ret, size = 1024;
145 if (codec->codec_id == AV_CODEC_ID_ADPCM_IMA_RAD)
146 ret = av_get_packet(s->pb, pkt, codec->block_align);
148 ret = av_get_packet(s->pb, pkt, size);
155 av_shrink_packet(pkt, ret);
157 pkt->stream_index = 0;
162 AVInputFormat ff_rsd_demuxer = {
164 .long_name = NULL_IF_CONFIG_SMALL("GameCube RSD"),
165 .read_probe = rsd_probe,
166 .read_header = rsd_read_header,
167 .read_packet = rsd_read_packet,
169 .codec_tag = (const AVCodecTag* const []){rsd_tags, 0},