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![Anton Khirnov](/assets/img/avatar_default.png)
Previously, AVStream.codec.time_base was used for that purpose, which was quite confusing for the callers. This change also opens the path for removing AVStream.codec. The change in the lavf-mkv test is due to the native timebase (1/1000) being used instead of the default one (1/90000), so the packets are now sent to the crc muxer in the same order in which they are demuxed (previously some of them got reordered because of inexact timestamp conversion).
86 lines
2.4 KiB
C
86 lines
2.4 KiB
C
/*
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* Adobe Filmstrip muxer
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* Copyright (c) 2010 Peter Ross
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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/**
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* @file
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* Adobe Filmstrip muxer
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*/
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#define RAND_TAG MKBETAG('R','a','n','d')
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typedef struct {
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int nb_frames;
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} FilmstripMuxContext;
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static int write_header(AVFormatContext *s)
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{
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if (s->streams[0]->codec->pix_fmt != AV_PIX_FMT_RGBA) {
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av_log(s, AV_LOG_ERROR, "only AV_PIX_FMT_RGBA is supported\n");
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return AVERROR_INVALIDDATA;
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}
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return 0;
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}
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static int write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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FilmstripMuxContext *film = s->priv_data;
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avio_write(s->pb, pkt->data, pkt->size);
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film->nb_frames++;
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return 0;
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}
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static int write_trailer(AVFormatContext *s)
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{
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FilmstripMuxContext *film = s->priv_data;
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AVIOContext *pb = s->pb;
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AVStream *st = s->streams[0];
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int i;
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avio_wb32(pb, RAND_TAG);
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avio_wb32(pb, film->nb_frames);
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avio_wb16(pb, 0); // packing method
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avio_wb16(pb, 0); // reserved
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avio_wb16(pb, st->codec->width);
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avio_wb16(pb, st->codec->height);
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avio_wb16(pb, 0); // leading
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// TODO: should be avg_frame_rate
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avio_wb16(pb, 1/av_q2d(st->time_base));
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for (i = 0; i < 16; i++)
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avio_w8(pb, 0x00); // reserved
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return 0;
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}
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AVOutputFormat ff_filmstrip_muxer = {
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.name = "filmstrip",
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.long_name = NULL_IF_CONFIG_SMALL("Adobe Filmstrip"),
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.extensions = "flm",
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.priv_data_size = sizeof(FilmstripMuxContext),
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.audio_codec = AV_CODEC_ID_NONE,
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.video_codec = AV_CODEC_ID_RAWVIDEO,
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.write_header = write_header,
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.write_packet = write_packet,
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.write_trailer = write_trailer,
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};
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