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a369a6b858
* qatar/master: (29 commits) fate: add golomb-test golomb-test: K&R formatting cosmetics h264: Split h264-test off into a separate file - golomb-test.c. h264-test: cleanup: drop timer invocations, commented out code and other cruft h264-test: Remove unused DSP and AVCodec contexts and related init calls. adpcm: Add missing stdint.h #include to fix standalone header compilation. lavf: add functions for accessing the fourcc<->CodecID mapping tables. lavc: set AVCodecContext.codec in avcodec_get_context_defaults3(). lavc: make avcodec_close() work properly on unopened codecs. lavc: add avcodec_is_open(). lavf: rename AVInputFormat.value to raw_codec_id. lavf: remove the pointless value field from flv and iv8 lavc/lavf: remove unnecessary symbols from the symbol version script. lavc: reorder AVCodec fields. lavf: reorder AVInput/OutputFormat fields. mp3dec: Fix a heap-buffer-overflow adpcmenc: remove some unneeded casts adpcmenc: use int16_t and uint8_t instead of short and unsigned char. adpcmenc: fix adpcm_ms extradata allocation adpcmenc: return proper AVERROR codes instead of -1 ... Conflicts: doc/APIchanges libavcodec/Makefile libavcodec/adpcmenc.c libavcodec/avcodec.h libavcodec/h264.c libavcodec/libavcodec.v libavcodec/mpc7.c libavcodec/mpegaudiodec.c libavcodec/options.c libavformat/Makefile libavformat/avformat.h libavformat/flvdec.c libavformat/libavformat.v Merged-by: Michael Niedermayer <michaelni@gmx.at>
119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/*
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* Copyright (c) 2009 Michael Niedermayer
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h"
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#include "internal.h"
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static int probe(AVProbeData *p)
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{
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// the single file I have starts with that, I do not know if others do, too
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if( p->buf[0] == 1
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&& p->buf[1] == 1
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&& p->buf[2] == 3
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&& p->buf[3] == 0xB8
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&& p->buf[4] == 0x80
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&& p->buf[5] == 0x60
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)
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return AVPROBE_SCORE_MAX-2;
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return 0;
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}
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static int read_header(AVFormatContext *s)
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{
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AVStream *st;
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codec->codec_id = CODEC_ID_MPEG4;
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st->need_parsing = AVSTREAM_PARSE_FULL;
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avpriv_set_pts_info(st, 64, 1, 90000);
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return 0;
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}
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static int read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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int ret, size, pts, type, flags;
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int first_pkt = 0;
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int frame_complete = 0;
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while (!frame_complete) {
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type = avio_rb16(s->pb); // 257 or 258
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size = avio_rb16(s->pb);
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flags = avio_rb16(s->pb); //some flags, 0x80 indicates end of frame
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avio_rb16(s->pb); //packet number
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pts = avio_rb32(s->pb);
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avio_rb32(s->pb); //6A 13 E3 88
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frame_complete = flags & 0x80;
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size -= 12;
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if (size < 1)
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return -1;
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if (type == 258) {
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avio_skip(s->pb, size);
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frame_complete = 0;
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continue;
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}
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if (!first_pkt) {
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ret = av_get_packet(s->pb, pkt, size);
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if (ret < 0)
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return ret;
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first_pkt = 1;
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pkt->pts = pts;
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pkt->pos -= 16;
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} else {
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ret = av_append_packet(s->pb, pkt, size);
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if (ret < 0) {
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av_log(s, AV_LOG_ERROR, "failed to grow packet\n");
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av_free_packet(pkt);
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return ret;
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}
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}
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if (ret < size) {
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av_log(s, AV_LOG_ERROR, "Truncated packet! Read %d of %d bytes\n",
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ret, size);
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pkt->flags |= AV_PKT_FLAG_CORRUPT;
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break;
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}
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}
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pkt->stream_index = 0;
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return 0;
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}
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AVInputFormat ff_iv8_demuxer = {
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.name = "iv8",
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.long_name = NULL_IF_CONFIG_SMALL("A format generated by IndigoVision 8000 video server"),
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.read_probe = probe,
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.read_header = read_header,
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.read_packet = read_packet,
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.flags= AVFMT_GENERIC_INDEX,
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};
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