mirror of
https://git.videolan.org/git/ffmpeg.git
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167 lines
4.8 KiB
C
167 lines
4.8 KiB
C
/**
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Copyright (C) 2005 Michael Ahlberg, Måns Rullgård
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use, copy,
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modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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**/
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#include <stdlib.h>
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#include "avformat.h"
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#include "bitstream.h"
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#include "bswap.h"
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#include "ogg2.h"
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#include "riff.h"
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static int
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ogm_header(AVFormatContext *s, int idx)
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{
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ogg_t *ogg = s->priv_data;
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ogg_stream_t *os = ogg->streams + idx;
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AVStream *st = s->streams[idx];
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uint8_t *p = os->buf + os->pstart;
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uint64_t time_unit;
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uint64_t spu;
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uint32_t default_len;
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if(!(*p & 1))
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return 0;
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if(*p != 1)
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return 1;
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p++;
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if(*p == 'v'){
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int tag;
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st->codec->codec_type = CODEC_TYPE_VIDEO;
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p += 8;
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tag = le2me_32(unaligned32(p));
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st->codec->codec_id = codec_get_bmp_id(tag);
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st->codec->codec_tag = tag;
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} else {
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int cid;
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st->codec->codec_type = CODEC_TYPE_AUDIO;
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p += 8;
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p[4] = 0;
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cid = strtol(p, NULL, 16);
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st->codec->codec_id = codec_get_wav_id(cid);
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}
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p += 4;
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p += 4; /* useless size field */
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time_unit = le2me_64(unaligned64(p));
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p += 8;
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spu = le2me_64(unaligned64(p));
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p += 8;
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default_len = le2me_32(unaligned32(p));
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p += 4;
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p += 8; /* buffersize + bits_per_sample */
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if(st->codec->codec_type == CODEC_TYPE_VIDEO){
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st->codec->width = le2me_32(unaligned32(p));
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p += 4;
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st->codec->height = le2me_32(unaligned32(p));
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st->codec->time_base.den = spu * 10000000;
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st->codec->time_base.num = time_unit;
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st->time_base = st->codec->time_base;
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} else {
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st->codec->channels = le2me_16(unaligned16(p));
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p += 2;
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p += 2; /* block_align */
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st->codec->bit_rate = le2me_32(unaligned32(p)) * 8;
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st->codec->sample_rate = spu * 10000000 / time_unit;
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st->time_base.num = 1;
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st->time_base.den = st->codec->sample_rate;
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}
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return 1;
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}
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static int
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ogm_dshow_header(AVFormatContext *s, int idx)
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{
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ogg_t *ogg = s->priv_data;
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ogg_stream_t *os = ogg->streams + idx;
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AVStream *st = s->streams[idx];
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uint8_t *p = os->buf + os->pstart;
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uint32_t t;
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if(!(*p & 1))
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return 0;
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if(*p != 1)
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return 1;
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t = le2me_32(unaligned32(p + 96));
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if(t == 0x05589f80){
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st->codec->codec_type = CODEC_TYPE_VIDEO;
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st->codec->codec_id = codec_get_bmp_id(le2me_32(unaligned32(p + 68)));
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st->codec->time_base.den = 10000000;
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st->codec->time_base.num = le2me_64(unaligned64(p + 164));
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st->codec->width = le2me_32(unaligned32(p + 176));
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st->codec->height = le2me_32(unaligned32(p + 180));
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} else if(t == 0x05589f81){
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st->codec->codec_type = CODEC_TYPE_AUDIO;
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st->codec->codec_id = codec_get_wav_id(le2me_16(unaligned16(p+124)));
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st->codec->channels = le2me_16(unaligned16(p + 126));
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st->codec->sample_rate = le2me_32(unaligned32(p + 128));
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st->codec->bit_rate = le2me_32(unaligned32(p + 132)) * 8;
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}
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return 1;
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}
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static int
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ogm_packet(AVFormatContext *s, int idx)
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{
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ogg_t *ogg = s->priv_data;
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ogg_stream_t *os = ogg->streams + idx;
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uint8_t *p = os->buf + os->pstart;
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int lb;
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lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
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os->pstart += lb + 1;
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os->psize -= lb + 1;
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return 0;
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}
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ogg_codec_t ogm_video_codec = {
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.magic = "\001video",
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.magicsize = 6,
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.header = ogm_header,
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.packet = ogm_packet
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};
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ogg_codec_t ogm_audio_codec = {
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.magic = "\001audio",
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.magicsize = 6,
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.header = ogm_header,
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.packet = ogm_packet
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};
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ogg_codec_t ogm_old_codec = {
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.magic = "\001Direct Show Samples embedded in Ogg",
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.magicsize = 35,
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.header = ogm_dshow_header,
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.packet = ogm_packet
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};
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