| 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 | }; |