diff options
author | David Conrad <lessen42@gmail.com> | 2010-01-11 03:31:52 +0300 |
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committer | David Conrad <lessen42@gmail.com> | 2010-01-11 03:31:52 +0300 |
commit | 24ca518bd1553e2e73d31b9f93df4fb7219606ff (patch) | |
tree | 0aa59b819974d286f6080eea24e447af51d57ba2 /libavformat | |
parent | 66b0255248d7a59d24eaf596312e7f14fb7d2cf3 (diff) |
Add support for dirac in ogg
Originally committed as revision 21128 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat')
-rw-r--r-- | libavformat/Makefile | 1 | ||||
-rw-r--r-- | libavformat/oggdec.c | 2 | ||||
-rw-r--r-- | libavformat/oggdec.h | 2 | ||||
-rw-r--r-- | libavformat/oggparsedirac.c | 109 |
4 files changed, 114 insertions, 0 deletions
diff --git a/libavformat/Makefile b/libavformat/Makefile index 9e52bc796c..d804728fcf 100644 --- a/libavformat/Makefile +++ b/libavformat/Makefile @@ -138,6 +138,7 @@ OBJS-$(CONFIG_NUT_DEMUXER) += nutdec.o nut.o riff.o OBJS-$(CONFIG_NUT_MUXER) += nutenc.o nut.o riff.o OBJS-$(CONFIG_NUV_DEMUXER) += nuv.o riff.o OBJS-$(CONFIG_OGG_DEMUXER) += oggdec.o \ + oggparsedirac.o \ oggparseflac.o \ oggparseogm.o \ oggparsespeex.o \ diff --git a/libavformat/oggdec.c b/libavformat/oggdec.c index 75afc84099..33b453c584 100644 --- a/libavformat/oggdec.c +++ b/libavformat/oggdec.c @@ -38,10 +38,12 @@ #define DECODER_BUFFER_SIZE MAX_PAGE_SIZE static const struct ogg_codec * const ogg_codecs[] = { + &ff_dirac_codec, &ff_speex_codec, &ff_vorbis_codec, &ff_theora_codec, &ff_flac_codec, + &ff_old_dirac_codec, &ff_old_flac_codec, &ff_ogm_video_codec, &ff_ogm_audio_codec, diff --git a/libavformat/oggdec.h b/libavformat/oggdec.h index 696233dd43..4db3fa6132 100644 --- a/libavformat/oggdec.h +++ b/libavformat/oggdec.h @@ -90,11 +90,13 @@ struct ogg { #define OGG_FLAG_BOS 2 #define OGG_FLAG_EOS 4 +extern const struct ogg_codec ff_dirac_codec; extern const struct ogg_codec ff_flac_codec; extern const struct ogg_codec ff_ogm_audio_codec; extern const struct ogg_codec ff_ogm_old_codec; extern const struct ogg_codec ff_ogm_text_codec; extern const struct ogg_codec ff_ogm_video_codec; +extern const struct ogg_codec ff_old_dirac_codec; extern const struct ogg_codec ff_old_flac_codec; extern const struct ogg_codec ff_speex_codec; extern const struct ogg_codec ff_theora_codec; diff --git a/libavformat/oggparsedirac.c b/libavformat/oggparsedirac.c new file mode 100644 index 0000000000..fc1a193205 --- /dev/null +++ b/libavformat/oggparsedirac.c @@ -0,0 +1,109 @@ +/* + * Copyright (C) 2008 David Conrad + * + * 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/get_bits.h" +#include "libavcodec/dirac.h" +#include "avformat.h" +#include "oggdec.h" + +static int dirac_header(AVFormatContext *s, int idx) +{ + struct ogg *ogg = s->priv_data; + struct ogg_stream *os = ogg->streams + idx; + AVStream *st = s->streams[idx]; + dirac_source_params source; + GetBitContext gb; + + // already parsed the header + if (st->codec->codec_id == CODEC_ID_DIRAC) + return 0; + + init_get_bits(&gb, os->buf + os->pstart + 13, (os->psize - 13) * 8); + if (ff_dirac_parse_sequence_header(st->codec, &gb, &source) < 0) + return -1; + + st->codec->codec_type = CODEC_TYPE_VIDEO; + st->codec->codec_id = CODEC_ID_DIRAC; + // dirac in ogg always stores timestamps as though the video were interlaced + st->time_base = (AVRational){st->codec->time_base.num, 2*st->codec->time_base.den}; + return 1; +} + +// various undocument things: granule is signed (only for dirac!) +static uint64_t dirac_gptopts(AVFormatContext *s, int idx, int64_t gp) +{ + struct ogg *ogg = s->priv_data; + struct ogg_stream *os = ogg->streams + idx; + + unsigned dist = ((gp >> 14) & 0xff00) | (gp & 0xff); + int64_t dts = (gp >> 31); + int64_t pts = dts + ((gp >> 9) & 0x1fff); + + if (!dist) + os->pflags |= PKT_FLAG_KEY; + + return pts; +} + +static int old_dirac_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 *buf = os->buf + os->pstart; + + if (buf[0] != 'K') + return 0; + + st->codec->codec_type = CODEC_TYPE_VIDEO; + st->codec->codec_id = CODEC_ID_DIRAC; + st->time_base.den = AV_RB32(buf+8); + st->time_base.num = AV_RB32(buf+12); + return 1; +} + +static uint64_t old_dirac_gptopts(AVFormatContext *s, int idx, uint64_t gp) +{ + struct ogg *ogg = s->priv_data; + struct ogg_stream *os = ogg->streams + idx; + uint64_t iframe = gp >> 30; + uint64_t pframe = gp & 0x3fffffff; + + if (!pframe) + os->pflags |= PKT_FLAG_KEY; + + return iframe + pframe; +} + +const struct ogg_codec ff_dirac_codec = { + .magic = "BBCD\0", + .magicsize = 5, + .header = dirac_header, + .gptopts = dirac_gptopts, + .granule_is_start = 1, +}; + +const struct ogg_codec ff_old_dirac_codec = { + .magic = "KW-DIRAC", + .magicsize = 8, + .header = old_dirac_header, + .gptopts = old_dirac_gptopts, + .granule_is_start = 1, +}; |