mirror of https://github.com/FFmpeg/FFmpeg.git
James Almer
12 years ago
parent
22c7784f60
commit
d3710c51d9
8 changed files with 170 additions and 1 deletions
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/*
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* RSD demuxer |
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* Copyright (c) 2013 James Almer |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavcodec/bytestream.h" |
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#include "libavutil/intreadwrite.h" |
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#include "avformat.h" |
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#include "avio.h" |
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#include "internal.h" |
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static const AVCodecTag rsd_tags[] = { |
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{ AV_CODEC_ID_ADPCM_THP, MKTAG('G','A','D','P') }, |
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{ AV_CODEC_ID_PCM_S16BE, MKTAG('P','C','M','B') }, |
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{ AV_CODEC_ID_PCM_S16LE, MKTAG('P','C','M',' ') }, |
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{ AV_CODEC_ID_NONE, 0 }, |
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}; |
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static const uint32_t rsd_unsupported_tags[] = { |
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MKTAG('O','G','G',' '), |
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MKTAG('R','A','D','P'), |
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MKTAG('V','A','G',' '), |
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MKTAG('W','A','D','P'), |
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MKTAG('X','A','D','P'), |
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MKTAG('X','M','A',' '), |
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}; |
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static int rsd_probe(AVProbeData *p) |
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{ |
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if (!memcmp(p->buf, "RSD", 3) && |
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p->buf[3] - '0' >= 2 && p->buf[3] - '0' <= 6) |
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return AVPROBE_SCORE_EXTENSION; |
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return 0; |
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} |
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static int rsd_read_header(AVFormatContext *s) |
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{ |
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AVIOContext *pb = s->pb; |
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int i, version, start = 0x800; |
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AVCodecContext *codec; |
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AVStream *st = avformat_new_stream(s, NULL); |
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if (!st) |
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return AVERROR(ENOMEM); |
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avio_skip(pb, 3); // "RSD"
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version = avio_r8(pb) - '0'; |
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codec = st->codec; |
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codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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codec->codec_tag = avio_rl32(pb); |
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codec->codec_id = ff_codec_get_id(rsd_tags, codec->codec_tag); |
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if (!codec->codec_id) { |
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char tag_buf[5]; |
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av_get_codec_tag_string(tag_buf, sizeof(tag_buf), codec->codec_tag); |
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for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) { |
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if (codec->codec_tag == rsd_unsupported_tags[i]) { |
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avpriv_request_sample(s, "Codec tag: %s", tag_buf); |
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return AVERROR_PATCHWELCOME; |
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} |
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} |
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av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf); |
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return AVERROR_INVALIDDATA; |
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} |
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codec->channels = avio_rl32(pb); |
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if (!codec->channels) |
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return AVERROR_INVALIDDATA; |
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avio_skip(pb, 4); // Bit depth
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codec->sample_rate = avio_rl32(pb); |
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if (!codec->sample_rate) |
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return AVERROR_INVALIDDATA; |
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avio_skip(pb, 4); // Unknown
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switch (codec->codec_id) { |
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case AV_CODEC_ID_ADPCM_THP: |
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/* RSD3GADP is mono, so only alloc enough memory
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to store the coeff table for a single channel. */ |
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codec->extradata_size = 32; |
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codec->extradata = av_malloc(codec->extradata_size); |
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if (!codec->extradata) |
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return AVERROR(ENOMEM); |
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start = avio_rl32(pb); |
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if (avio_read(s->pb, codec->extradata, 32) != 32) |
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return AVERROR_INVALIDDATA; |
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for (i = 0; i < 16; i++) |
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AV_WB16(codec->extradata + i * 2, AV_RL16(codec->extradata + i * 2)); |
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if (pb->seekable) |
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st->duration = (avio_size(pb) - start) / 8 * 14; |
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break; |
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case AV_CODEC_ID_PCM_S16LE: |
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case AV_CODEC_ID_PCM_S16BE: |
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if (version != 4) |
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start = avio_rl32(pb); |
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if (pb->seekable) |
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st->duration = (avio_size(pb) - start) / 2 / codec->channels; |
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break; |
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} |
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avio_skip(pb, start - avio_tell(pb)); |
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avpriv_set_pts_info(st, 64, 1, codec->sample_rate); |
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return 0; |
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} |
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static int rsd_read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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int ret, size = 1024; |
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if (url_feof(s->pb)) |
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return AVERROR_EOF; |
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ret = av_get_packet(s->pb, pkt, size); |
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if (ret != size) { |
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if (ret < 0) { |
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av_free_packet(pkt); |
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return ret; |
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} |
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av_shrink_packet(pkt, ret); |
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} |
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pkt->stream_index = 0; |
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return ret; |
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} |
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AVInputFormat ff_rsd_demuxer = { |
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.name = "rsd", |
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.long_name = NULL_IF_CONFIG_SMALL("GameCube RSD"), |
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.read_probe = rsd_probe, |
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.read_header = rsd_read_header, |
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.read_packet = rsd_read_packet, |
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.extensions = "rsd", |
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.codec_tag = (const AVCodecTag* const []){rsd_tags, 0}, |
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}; |
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@ -0,0 +1 @@ |
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CRC=0x7b7807d8 |
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