From 8992cb1d0d07edc33d274f6d7924ecdf6f83d994 Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Thu, 5 Sep 2013 17:57:22 +0100 Subject: making act segmenter --- ffmpeg/libavformat/oggparseogm.c | 202 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 202 insertions(+) create mode 100644 ffmpeg/libavformat/oggparseogm.c (limited to 'ffmpeg/libavformat/oggparseogm.c') diff --git a/ffmpeg/libavformat/oggparseogm.c b/ffmpeg/libavformat/oggparseogm.c new file mode 100644 index 0000000..a3caac0 --- /dev/null +++ b/ffmpeg/libavformat/oggparseogm.c @@ -0,0 +1,202 @@ +/** + 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 +#include "libavutil/avassert.h" +#include "libavutil/intreadwrite.h" +#include "libavcodec/get_bits.h" +#include "libavcodec/bytestream.h" +#include "avformat.h" +#include "internal.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; + uint32_t size; + + 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 = AV_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); + // our parser completely breaks AAC in Ogg + if (st->codec->codec_id != AV_CODEC_ID_AAC) + st->need_parsing = AVSTREAM_PARSE_FULL; + } + + size = bytestream_get_le32(&p); + size = FFMIN(size, os->psize); + 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); + avpriv_set_pts_info(st, 64, time_unit, spu * 10000000); + } 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 = time_unit ? spu * 10000000 / time_unit : 0; + avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); + if (size >= 56 && st->codec->codec_id == AV_CODEC_ID_AAC) { + p += 4; + size -= 4; + } + if (size > 52) { + av_assert0(FF_INPUT_BUFFER_PADDING_SIZE <= 52); + size -= 52; + st->codec->extradata_size = size; + st->codec->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); + bytestream_get_buffer(&p, st->codec->extradata, size); + } + } + } 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)); + avpriv_set_pts_info(st, 64, AV_RL64(p + 164), 10000000); + 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, + .nb_header = 2, +}; + +const struct ogg_codec ff_ogm_audio_codec = { + .magic = "\001audio", + .magicsize = 6, + .header = ogm_header, + .packet = ogm_packet, + .granule_is_start = 1, + .nb_header = 2, +}; + +const struct ogg_codec ff_ogm_text_codec = { + .magic = "\001text", + .magicsize = 5, + .header = ogm_header, + .packet = ogm_packet, + .granule_is_start = 1, + .nb_header = 2, +}; + +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, + .nb_header = 1, +}; -- cgit v1.2.3