| /* |
| * Adobe Filmstrip muxer |
| * Copyright (c) 2010 Peter Ross |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * Adobe Filmstrip muxer |
| */ |
| |
| #include "libavutil/intreadwrite.h" |
| #include "avformat.h" |
| #include "rawenc.h" |
| |
| #define RAND_TAG MKBETAG('R','a','n','d') |
| |
| static int write_header(AVFormatContext *s) |
| { |
| if (s->streams[0]->codecpar->format != AV_PIX_FMT_RGBA) { |
| av_log(s, AV_LOG_ERROR, "only AV_PIX_FMT_RGBA is supported\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| return 0; |
| } |
| |
| static int write_trailer(AVFormatContext *s) |
| { |
| AVIOContext *pb = s->pb; |
| AVStream *st = s->streams[0]; |
| int i; |
| |
| avio_wb32(pb, RAND_TAG); |
| avio_wb32(pb, st->nb_frames); |
| avio_wb16(pb, 0); // packing method |
| avio_wb16(pb, 0); // reserved |
| avio_wb16(pb, st->codecpar->width); |
| avio_wb16(pb, st->codecpar->height); |
| avio_wb16(pb, 0); // leading |
| // TODO: should be avg_frame_rate |
| avio_wb16(pb, st->time_base.den / st->time_base.num); |
| for (i = 0; i < 16; i++) |
| avio_w8(pb, 0x00); // reserved |
| |
| return 0; |
| } |
| |
| AVOutputFormat ff_filmstrip_muxer = { |
| .name = "filmstrip", |
| .long_name = NULL_IF_CONFIG_SMALL("Adobe Filmstrip"), |
| .extensions = "flm", |
| .audio_codec = AV_CODEC_ID_NONE, |
| .video_codec = AV_CODEC_ID_RAWVIDEO, |
| .write_header = write_header, |
| .write_packet = ff_raw_write_packet, |
| .write_trailer = write_trailer, |
| }; |