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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 | ||
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[5]; | |
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 | }; |