diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/oggparseogm.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/oggparseogm.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavformat/oggparseogm.c b/contrib/ffmpeg/libavformat/oggparseogm.c new file mode 100644 index 000000000..70e53948f --- /dev/null +++ b/contrib/ffmpeg/libavformat/oggparseogm.c @@ -0,0 +1,177 @@ +/** + 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 "avformat.h" +#include "bitstream.h" +#include "bytestream.h" +#include "intreadwrite.h" +#include "oggdec.h" +#include "riff.h" + +static int +ogm_header(AVFormatContext *s, int idx) +{ + ogg_t *ogg = s->priv_data; + ogg_stream_t *os = ogg->streams + idx; + AVStream *st = s->streams[idx]; + const uint8_t *p = os->buf + os->pstart; + uint64_t time_unit; + uint64_t spu; + uint32_t default_len; + + if(!(*p & 1)) + return 0; + if(*p != 1) + return 1; + + p++; + + if(*p == 'v'){ + int tag; + st->codec->codec_type = CODEC_TYPE_VIDEO; + p += 8; + tag = bytestream_get_le32(&p); + st->codec->codec_id = codec_get_id(codec_bmp_tags, tag); + st->codec->codec_tag = tag; + } else if (*p == 't') { + st->codec->codec_type = CODEC_TYPE_SUBTITLE; + st->codec->codec_id = CODEC_ID_TEXT; + p += 12; + } else { + uint8_t acid[5]; + int cid; + st->codec->codec_type = CODEC_TYPE_AUDIO; + p += 8; + bytestream_get_buffer(&p, acid, 4); + acid[4] = 0; + cid = strtol(acid, NULL, 16); + st->codec->codec_id = codec_get_id(codec_wav_tags, cid); + } + + p += 4; /* useless size field */ + + time_unit = bytestream_get_le64(&p); + spu = bytestream_get_le64(&p); + default_len = bytestream_get_le32(&p); + + p += 8; /* buffersize + bits_per_sample */ + + if(st->codec->codec_type == CODEC_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; + st->time_base = st->codec->time_base; + } 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; + st->time_base.num = 1; + st->time_base.den = st->codec->sample_rate; + } + + return 1; +} + +static int +ogm_dshow_header(AVFormatContext *s, int idx) +{ + ogg_t *ogg = s->priv_data; + ogg_stream_t *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 = CODEC_TYPE_VIDEO; + st->codec->codec_id = codec_get_id(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 = CODEC_TYPE_AUDIO; + st->codec->codec_id = codec_get_id(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) +{ + ogg_t *ogg = s->priv_data; + ogg_stream_t *os = ogg->streams + idx; + uint8_t *p = os->buf + os->pstart; + int lb; + + if(*p & 8) + os->pflags |= PKT_FLAG_KEY; + + lb = ((*p & 2) << 1) | ((*p >> 6) & 3); + os->pstart += lb + 1; + os->psize -= lb + 1; + + return 0; +} + +ogg_codec_t ogm_video_codec = { + .magic = "\001video", + .magicsize = 6, + .header = ogm_header, + .packet = ogm_packet +}; + +ogg_codec_t ogm_audio_codec = { + .magic = "\001audio", + .magicsize = 6, + .header = ogm_header, + .packet = ogm_packet +}; + +ogg_codec_t ogm_text_codec = { + .magic = "\001text", + .magicsize = 5, + .header = ogm_header, + .packet = ogm_packet +}; + +ogg_codec_t ogm_old_codec = { + .magic = "\001Direct Show Samples embedded in Ogg", + .magicsize = 35, + .header = ogm_dshow_header, + .packet = ogm_packet +}; |