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bb11584924
Codec information may change while reading ogg packets. Update the stream's internal avctx to match.
229 lines
7.4 KiB
C
229 lines
7.4 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 "libavutil/intreadwrite.h"
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#include "libavcodec/bytestream.h"
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#include "avformat.h"
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#include "internal.h"
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#include "oggdec.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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struct ogg *ogg = s->priv_data;
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struct ogg_stream *os = ogg->streams + idx;
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AVStream *st = s->streams[idx];
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GetByteContext p;
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uint64_t time_unit;
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uint64_t spu;
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uint32_t size;
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bytestream2_init(&p, os->buf + os->pstart, os->psize);
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if (!(bytestream2_peek_byte(&p) & 1))
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return 0;
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if (bytestream2_peek_byte(&p) == 1) {
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bytestream2_skip(&p, 1);
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if (bytestream2_peek_byte(&p) == 'v'){
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int tag;
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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bytestream2_skip(&p, 8);
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tag = bytestream2_get_le32(&p);
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st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag);
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st->codecpar->codec_tag = tag;
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if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4)
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st->need_parsing = AVSTREAM_PARSE_HEADERS;
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} else if (bytestream2_peek_byte(&p) == 't') {
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st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
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st->codecpar->codec_id = AV_CODEC_ID_TEXT;
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bytestream2_skip(&p, 12);
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} else {
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uint8_t acid[5] = { 0 };
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int cid;
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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bytestream2_skip(&p, 8);
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bytestream2_get_buffer(&p, acid, 4);
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acid[4] = 0;
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cid = strtol(acid, NULL, 16);
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st->codecpar->codec_id = ff_codec_get_id(ff_codec_wav_tags, cid);
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// our parser completely breaks AAC in Ogg
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if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
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st->need_parsing = AVSTREAM_PARSE_FULL;
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}
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size = bytestream2_get_le32(&p);
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size = FFMIN(size, os->psize);
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time_unit = bytestream2_get_le64(&p);
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spu = bytestream2_get_le64(&p);
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if (!time_unit || !spu) {
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av_log(s, AV_LOG_ERROR, "Invalid timing values.\n");
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return AVERROR_INVALIDDATA;
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}
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bytestream2_skip(&p, 4); /* default_len */
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bytestream2_skip(&p, 8); /* buffersize + bits_per_sample */
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if(st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO){
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st->codecpar->width = bytestream2_get_le32(&p);
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st->codecpar->height = bytestream2_get_le32(&p);
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avpriv_set_pts_info(st, 64, time_unit, spu * 10000000);
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} else {
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st->codecpar->channels = bytestream2_get_le16(&p);
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bytestream2_skip(&p, 2); /* block_align */
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st->codecpar->bit_rate = bytestream2_get_le32(&p) * 8;
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st->codecpar->sample_rate = spu * 10000000 / time_unit;
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avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
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if (size >= 56 && st->codecpar->codec_id == AV_CODEC_ID_AAC) {
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bytestream2_skip(&p, 4);
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size -= 4;
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}
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if (size > 52) {
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size -= 52;
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if (bytestream2_get_bytes_left(&p) < size)
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return AVERROR_INVALIDDATA;
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av_freep(&st->codecpar->extradata);
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if (ff_alloc_extradata(st->codecpar, size) < 0)
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return AVERROR(ENOMEM);
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bytestream2_get_buffer(&p, st->codecpar->extradata, st->codecpar->extradata_size);
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}
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}
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// Update internal avctx with changes to codecpar above.
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st->internal->need_context_update = 1;
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} else if (bytestream2_peek_byte(&p) == 3) {
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bytestream2_skip(&p, 7);
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if (bytestream2_get_bytes_left(&p) > 1)
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ff_vorbis_stream_comment(s, st, p.buffer, bytestream2_get_bytes_left(&p) - 1);
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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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struct ogg *ogg = s->priv_data;
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struct ogg_stream *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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if (os->psize < 100)
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return AVERROR_INVALIDDATA;
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t = AV_RL32(p + 96);
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if(t == 0x05589f80){
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if (os->psize < 184)
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return AVERROR_INVALIDDATA;
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(p + 68));
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avpriv_set_pts_info(st, 64, AV_RL64(p + 164), 10000000);
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st->codecpar->width = AV_RL32(p + 176);
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st->codecpar->height = AV_RL32(p + 180);
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} else if(t == 0x05589f81){
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if (os->psize < 136)
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return AVERROR_INVALIDDATA;
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_id = ff_codec_get_id(ff_codec_wav_tags, AV_RL16(p + 124));
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st->codecpar->channels = AV_RL16(p + 126);
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st->codecpar->sample_rate = AV_RL32(p + 128);
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st->codecpar->bit_rate = AV_RL32(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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struct ogg *ogg = s->priv_data;
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struct ogg_stream *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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if(*p & 8)
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os->pflags |= AV_PKT_FLAG_KEY;
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lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
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if (os->psize < lb + 1)
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return AVERROR_INVALIDDATA;
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os->pstart += lb + 1;
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os->psize -= lb + 1;
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while (lb--)
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os->pduration += (uint64_t)p[lb+1] << (lb*8);
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return 0;
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}
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const struct ogg_codec ff_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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.granule_is_start = 1,
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.nb_header = 2,
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};
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const struct ogg_codec ff_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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.granule_is_start = 1,
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.nb_header = 2,
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};
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const struct ogg_codec ff_ogm_text_codec = {
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.magic = "\001text",
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.magicsize = 5,
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.header = ogm_header,
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.packet = ogm_packet,
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.granule_is_start = 1,
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.nb_header = 2,
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};
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const struct ogg_codec ff_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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.granule_is_start = 1,
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.nb_header = 1,
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};
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