repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * Adobe Filmstrip muxer | |
| 3 | * Copyright (c) 2010 Peter Ross | |
| 4 | * | |
| 5 | * This file is part of FFmpeg. | |
| 6 | * | |
| 7 | * FFmpeg is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU Lesser General Public | |
| 9 | * License as published by the Free Software Foundation; either | |
| 10 | * version 2.1 of the License, or (at your option) any later version. | |
| 11 | * | |
| 12 | * FFmpeg is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * Lesser General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU Lesser General Public | |
| 18 | * License along with FFmpeg; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 20 | */ | |
| 21 | ||
| 22 | /** | |
| 23 | * @file | |
| 24 | * Adobe Filmstrip muxer | |
| 25 | */ | |
| 26 | ||
| 27 | #include "libavutil/intreadwrite.h" | |
| 28 | #include "avformat.h" | |
| 29 | ||
| 30 | #define RAND_TAG MKBETAG('R','a','n','d') | |
| 31 | ||
| 32 | typedef struct { | |
| 33 | int nb_frames; | |
| 34 | } FilmstripMuxContext; | |
| 35 | ||
| 36 | static int write_header(AVFormatContext *s) | |
| 37 | { | |
| 38 | if (s->streams[0]->codec->pix_fmt != AV_PIX_FMT_RGBA) { | |
| 39 | av_log(s, AV_LOG_ERROR, "only AV_PIX_FMT_RGBA is supported\n"); | |
| 40 | return AVERROR_INVALIDDATA; | |
| 41 | } | |
| 42 | return 0; | |
| 43 | } | |
| 44 | ||
| 45 | static int write_packet(AVFormatContext *s, AVPacket *pkt) | |
| 46 | { | |
| 47 | FilmstripMuxContext *film = s->priv_data; | |
| 48 | avio_write(s->pb, pkt->data, pkt->size); | |
| 49 | film->nb_frames++; | |
| 50 | return 0; | |
| 51 | } | |
| 52 | ||
| 53 | static int write_trailer(AVFormatContext *s) | |
| 54 | { | |
| 55 | FilmstripMuxContext *film = s->priv_data; | |
| 56 | AVIOContext *pb = s->pb; | |
| 57 | AVStream *st = s->streams[0]; | |
| 58 | int i; | |
| 59 | ||
| 60 | avio_wb32(pb, RAND_TAG); | |
| 61 | avio_wb32(pb, film->nb_frames); | |
| 62 | avio_wb16(pb, 0); // packing method | |
| 63 | avio_wb16(pb, 0); // reserved | |
| 64 | avio_wb16(pb, st->codec->width); | |
| 65 | avio_wb16(pb, st->codec->height); | |
| 66 | avio_wb16(pb, 0); // leading | |
| 67 | // TODO: should be avg_frame_rate | |
| 68 | avio_wb16(pb, st->time_base.den / st->time_base.num); | |
| 69 | for (i = 0; i < 16; i++) | |
| 70 | avio_w8(pb, 0x00); // reserved | |
| 71 | ||
| 72 | return 0; | |
| 73 | } | |
| 74 | ||
| 75 | AVOutputFormat ff_filmstrip_muxer = { | |
| 76 | .name = "filmstrip", | |
| 77 | .long_name = NULL_IF_CONFIG_SMALL("Adobe Filmstrip"), | |
| 78 | .extensions = "flm", | |
| 79 | .priv_data_size = sizeof(FilmstripMuxContext), | |
| 80 | .audio_codec = AV_CODEC_ID_NONE, | |
| 81 | .video_codec = AV_CODEC_ID_RAWVIDEO, | |
| 82 | .write_header = write_header, | |
| 83 | .write_packet = write_packet, | |
| 84 | .write_trailer = write_trailer, | |
| 85 | }; |