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84 lines
2.4 KiB
84 lines
2.4 KiB
/* |
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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 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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/** |
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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 != PIX_FMT_RGBA) { |
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av_log(s, AV_LOG_ERROR, "only 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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avio_wb16(pb, 1/av_q2d(st->codec->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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