| /** |
| Copyright (C) 2005 Michael Ahlberg, Måns Rullgård |
| |
| Permission is hereby granted, free of charge, to any person |
| obtaining a copy of this software and associated documentation |
| files (the "Software"), to deal in the Software without |
| restriction, including without limitation the rights to use, copy, |
| modify, merge, publish, distribute, sublicense, and/or sell copies |
| of the Software, and to permit persons to whom the Software is |
| furnished to do so, subject to the following conditions: |
| |
| The above copyright notice and this permission notice shall be |
| included in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
| HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| DEALINGS IN THE SOFTWARE. |
| **/ |
| |
| #include <stdlib.h> |
| #include "libavutil/intreadwrite.h" |
| #include "libavcodec/get_bits.h" |
| #include "libavcodec/bytestream.h" |
| #include "avformat.h" |
| #include "oggdec.h" |
| #include "riff.h" |
| |
| static int |
| ogm_header(AVFormatContext *s, int idx) |
| { |
| struct ogg *ogg = s->priv_data; |
| struct ogg_stream *os = ogg->streams + idx; |
| AVStream *st = s->streams[idx]; |
| const uint8_t *p = os->buf + os->pstart; |
| uint64_t time_unit; |
| uint64_t spu; |
| |
| if(!(*p & 1)) |
| return 0; |
| |
| if(*p == 1) { |
| p++; |
| |
| if(*p == 'v'){ |
| int tag; |
| st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| p += 8; |
| tag = bytestream_get_le32(&p); |
| st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag); |
| st->codec->codec_tag = tag; |
| } else if (*p == 't') { |
| st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
| st->codec->codec_id = CODEC_ID_TEXT; |
| p += 12; |
| } else { |
| uint8_t acid[5]; |
| int cid; |
| st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| p += 8; |
| bytestream_get_buffer(&p, acid, 4); |
| acid[4] = 0; |
| cid = strtol(acid, NULL, 16); |
| st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, cid); |
| st->need_parsing = AVSTREAM_PARSE_FULL; |
| } |
| |
| p += 4; /* useless size field */ |
| |
| time_unit = bytestream_get_le64(&p); |
| spu = bytestream_get_le64(&p); |
| p += 4; /* default_len */ |
| p += 8; /* buffersize + bits_per_sample */ |
| |
| if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){ |
| st->codec->width = bytestream_get_le32(&p); |
| st->codec->height = bytestream_get_le32(&p); |
| st->codec->time_base.den = spu * 10000000; |
| st->codec->time_base.num = time_unit; |
| av_set_pts_info(st, 64, st->codec->time_base.num, st->codec->time_base.den); |
| } else { |
| st->codec->channels = bytestream_get_le16(&p); |
| p += 2; /* block_align */ |
| st->codec->bit_rate = bytestream_get_le32(&p) * 8; |
| st->codec->sample_rate = spu * 10000000 / time_unit; |
| av_set_pts_info(st, 64, 1, st->codec->sample_rate); |
| } |
| } else if (*p == 3) { |
| if (os->psize > 8) |
| ff_vorbis_comment(s, &st->metadata, p+7, os->psize-8); |
| } |
| |
| return 1; |
| } |
| |
| static int |
| ogm_dshow_header(AVFormatContext *s, int idx) |
| { |
| struct ogg *ogg = s->priv_data; |
| struct ogg_stream *os = ogg->streams + idx; |
| AVStream *st = s->streams[idx]; |
| uint8_t *p = os->buf + os->pstart; |
| uint32_t t; |
| |
| if(!(*p & 1)) |
| return 0; |
| if(*p != 1) |
| return 1; |
| |
| t = AV_RL32(p + 96); |
| |
| if(t == 0x05589f80){ |
| st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(p + 68)); |
| st->codec->time_base.den = 10000000; |
| st->codec->time_base.num = AV_RL64(p + 164); |
| st->codec->width = AV_RL32(p + 176); |
| st->codec->height = AV_RL32(p + 180); |
| } else if(t == 0x05589f81){ |
| st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, AV_RL16(p + 124)); |
| st->codec->channels = AV_RL16(p + 126); |
| st->codec->sample_rate = AV_RL32(p + 128); |
| st->codec->bit_rate = AV_RL32(p + 132) * 8; |
| } |
| |
| return 1; |
| } |
| |
| static int |
| ogm_packet(AVFormatContext *s, int idx) |
| { |
| struct ogg *ogg = s->priv_data; |
| struct ogg_stream *os = ogg->streams + idx; |
| uint8_t *p = os->buf + os->pstart; |
| int lb; |
| |
| if(*p & 8) |
| os->pflags |= AV_PKT_FLAG_KEY; |
| |
| lb = ((*p & 2) << 1) | ((*p >> 6) & 3); |
| os->pstart += lb + 1; |
| os->psize -= lb + 1; |
| |
| while (lb--) |
| os->pduration += p[lb+1] << (lb*8); |
| |
| return 0; |
| } |
| |
| const struct ogg_codec ff_ogm_video_codec = { |
| .magic = "\001video", |
| .magicsize = 6, |
| .header = ogm_header, |
| .packet = ogm_packet, |
| .granule_is_start = 1, |
| }; |
| |
| const struct ogg_codec ff_ogm_audio_codec = { |
| .magic = "\001audio", |
| .magicsize = 6, |
| .header = ogm_header, |
| .packet = ogm_packet, |
| .granule_is_start = 1, |
| }; |
| |
| const struct ogg_codec ff_ogm_text_codec = { |
| .magic = "\001text", |
| .magicsize = 5, |
| .header = ogm_header, |
| .packet = ogm_packet, |
| .granule_is_start = 1, |
| }; |
| |
| const struct ogg_codec ff_ogm_old_codec = { |
| .magic = "\001Direct Show Samples embedded in Ogg", |
| .magicsize = 35, |
| .header = ogm_dshow_header, |
| .packet = ogm_packet, |
| .granule_is_start = 1, |
| }; |