| /* |
| * RSD demuxer |
| * Copyright (c) 2013 James Almer |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavcodec/bytestream.h" |
| #include "libavutil/intreadwrite.h" |
| #include "avformat.h" |
| #include "avio.h" |
| #include "internal.h" |
| |
| static const AVCodecTag rsd_tags[] = { |
| { AV_CODEC_ID_ADPCM_PSX, MKTAG('V','A','G',' ') }, |
| { AV_CODEC_ID_ADPCM_THP_LE, MKTAG('G','A','D','P') }, |
| { AV_CODEC_ID_ADPCM_THP, MKTAG('W','A','D','P') }, |
| { AV_CODEC_ID_ADPCM_IMA_RAD, MKTAG('R','A','D','P') }, |
| { AV_CODEC_ID_ADPCM_IMA_WAV, MKTAG('X','A','D','P') }, |
| { AV_CODEC_ID_PCM_S16BE, MKTAG('P','C','M','B') }, |
| { AV_CODEC_ID_PCM_S16LE, MKTAG('P','C','M',' ') }, |
| { AV_CODEC_ID_XMA2, MKTAG('X','M','A',' ') }, |
| { AV_CODEC_ID_NONE, 0 }, |
| }; |
| |
| static const uint32_t rsd_unsupported_tags[] = { |
| MKTAG('O','G','G',' '), |
| }; |
| |
| static int rsd_probe(AVProbeData *p) |
| { |
| if (memcmp(p->buf, "RSD", 3) || p->buf[3] - '0' < 2 || p->buf[3] - '0' > 6) |
| return 0; |
| if (AV_RL32(p->buf + 8) > 256 || !AV_RL32(p->buf + 8)) |
| return AVPROBE_SCORE_MAX / 8; |
| if (AV_RL32(p->buf + 16) > 8*48000 || !AV_RL32(p->buf + 16)) |
| return AVPROBE_SCORE_MAX / 8; |
| return AVPROBE_SCORE_MAX; |
| } |
| |
| static int rsd_read_header(AVFormatContext *s) |
| { |
| AVIOContext *pb = s->pb; |
| int i, ret, version, start = 0x800; |
| AVCodecContext *codec; |
| AVStream *st = avformat_new_stream(s, NULL); |
| |
| if (!st) |
| return AVERROR(ENOMEM); |
| |
| avio_skip(pb, 3); // "RSD" |
| version = avio_r8(pb) - '0'; |
| |
| codec = st->codec; |
| codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| codec->codec_tag = avio_rl32(pb); |
| codec->codec_id = ff_codec_get_id(rsd_tags, codec->codec_tag); |
| if (!codec->codec_id) { |
| char tag_buf[32]; |
| |
| av_get_codec_tag_string(tag_buf, sizeof(tag_buf), codec->codec_tag); |
| for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) { |
| if (codec->codec_tag == rsd_unsupported_tags[i]) { |
| avpriv_request_sample(s, "Codec tag: %s", tag_buf); |
| return AVERROR_PATCHWELCOME; |
| } |
| } |
| av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| codec->channels = avio_rl32(pb); |
| if (!codec->channels) |
| return AVERROR_INVALIDDATA; |
| |
| avio_skip(pb, 4); // Bit depth |
| codec->sample_rate = avio_rl32(pb); |
| if (!codec->sample_rate) |
| return AVERROR_INVALIDDATA; |
| |
| avio_skip(pb, 4); // Unknown |
| |
| switch (codec->codec_id) { |
| case AV_CODEC_ID_XMA2: |
| codec->block_align = 2048; |
| ff_alloc_extradata(codec, 34); |
| if (!codec->extradata) |
| return AVERROR(ENOMEM); |
| memset(codec->extradata, 0, 34); |
| break; |
| case AV_CODEC_ID_ADPCM_PSX: |
| codec->block_align = 16 * codec->channels; |
| if (pb->seekable) |
| st->duration = av_get_audio_frame_duration(codec, avio_size(pb) - start); |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_RAD: |
| codec->block_align = 20 * codec->channels; |
| if (pb->seekable) |
| st->duration = av_get_audio_frame_duration(codec, avio_size(pb) - start); |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_WAV: |
| if (version == 2) |
| start = avio_rl32(pb); |
| |
| codec->bits_per_coded_sample = 4; |
| codec->block_align = 36 * codec->channels; |
| if (pb->seekable) |
| st->duration = av_get_audio_frame_duration(codec, avio_size(pb) - start); |
| break; |
| case AV_CODEC_ID_ADPCM_THP_LE: |
| /* RSD3GADP is mono, so only alloc enough memory |
| to store the coeff table for a single channel. */ |
| |
| start = avio_rl32(pb); |
| |
| if ((ret = ff_get_extradata(codec, s->pb, 32)) < 0) |
| return ret; |
| if (pb->seekable) |
| st->duration = av_get_audio_frame_duration(codec, avio_size(pb) - start); |
| break; |
| case AV_CODEC_ID_ADPCM_THP: |
| codec->block_align = 8 * codec->channels; |
| avio_skip(s->pb, 0x1A4 - avio_tell(s->pb)); |
| |
| if ((ret = ff_alloc_extradata(st->codec, 32 * st->codec->channels)) < 0) |
| return ret; |
| |
| for (i = 0; i < st->codec->channels; i++) { |
| avio_read(s->pb, st->codec->extradata + 32 * i, 32); |
| avio_skip(s->pb, 8); |
| } |
| if (pb->seekable) |
| st->duration = (avio_size(pb) - start) / (8 * st->codec->channels) * 14; |
| break; |
| case AV_CODEC_ID_PCM_S16LE: |
| case AV_CODEC_ID_PCM_S16BE: |
| if (version != 4) |
| start = avio_rl32(pb); |
| |
| if (pb->seekable) |
| st->duration = (avio_size(pb) - start) / 2 / codec->channels; |
| break; |
| } |
| |
| avio_skip(pb, start - avio_tell(pb)); |
| if (codec->codec_id == AV_CODEC_ID_XMA2) { |
| avio_skip(pb, avio_rb32(pb) + avio_rb32(pb)); |
| st->duration = avio_rb32(pb); |
| } |
| |
| avpriv_set_pts_info(st, 64, 1, codec->sample_rate); |
| |
| return 0; |
| } |
| |
| static int rsd_read_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| AVCodecContext *codec = s->streams[0]->codec; |
| int ret, size = 1024; |
| int64_t pos; |
| |
| if (avio_feof(s->pb)) |
| return AVERROR_EOF; |
| |
| pos = avio_tell(s->pb); |
| if (codec->codec_id == AV_CODEC_ID_ADPCM_IMA_RAD || |
| codec->codec_id == AV_CODEC_ID_ADPCM_PSX || |
| codec->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV || |
| codec->codec_id == AV_CODEC_ID_XMA2) { |
| ret = av_get_packet(s->pb, pkt, codec->block_align); |
| } else if (codec->codec_tag == MKTAG('W','A','D','P') && |
| codec->channels > 1) { |
| int i, ch; |
| |
| ret = av_new_packet(pkt, codec->block_align); |
| if (ret < 0) |
| return ret; |
| for (i = 0; i < 4; i++) { |
| for (ch = 0; ch < codec->channels; ch++) { |
| pkt->data[ch * 8 + i * 2 + 0] = avio_r8(s->pb); |
| pkt->data[ch * 8 + i * 2 + 1] = avio_r8(s->pb); |
| } |
| } |
| ret = 0; |
| } else { |
| ret = av_get_packet(s->pb, pkt, size); |
| } |
| |
| if (codec->codec_id == AV_CODEC_ID_XMA2 && pkt->size >= 1) |
| pkt->duration = (pkt->data[0] >> 2) * 512; |
| |
| pkt->pos = pos; |
| pkt->stream_index = 0; |
| |
| return ret; |
| } |
| |
| AVInputFormat ff_rsd_demuxer = { |
| .name = "rsd", |
| .long_name = NULL_IF_CONFIG_SMALL("GameCube RSD"), |
| .read_probe = rsd_probe, |
| .read_header = rsd_read_header, |
| .read_packet = rsd_read_packet, |
| .extensions = "rsd", |
| .codec_tag = (const AVCodecTag* const []){rsd_tags, 0}, |
| .flags = AVFMT_GENERIC_INDEX, |
| }; |
