repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * Copyright (c) 2010 David Conrad | |
| 3 | * | |
| 4 | * This file is part of FFmpeg. | |
| 5 | * | |
| 6 | * FFmpeg is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU Lesser General Public | |
| 8 | * License as published by the Free Software Foundation; either | |
| 9 | * version 2.1 of the License, or (at your option) any later version. | |
| 10 | * | |
| 11 | * FFmpeg is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | * Lesser General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU Lesser General Public | |
| 17 | * License along with FFmpeg; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 19 | */ | |
| 20 | ||
| 21 | #include "avformat.h" | |
| 22 | #include "internal.h" | |
| 23 | #include "riff.h" | |
| 24 | #include "libavutil/intreadwrite.h" | |
| 25 | ||
| 26 | static int probe(AVProbeData *p) | |
| 27 | { | |
| 28 | if (AV_RL32(p->buf) == MKTAG('D','K','I','F') | |
| 29 | && !AV_RL16(p->buf+4) && AV_RL16(p->buf+6) == 32) | |
| 30 | return AVPROBE_SCORE_MAX-2; | |
| 31 | ||
| 32 | return 0; | |
| 33 | } | |
| 34 | ||
| 35 | static int read_header(AVFormatContext *s) | |
| 36 | { | |
| 37 | AVStream *st; | |
| 38 | AVRational time_base; | |
| 39 | ||
| 40 | avio_rl32(s->pb); // DKIF | |
| 41 | avio_rl16(s->pb); // version | |
| 42 | avio_rl16(s->pb); // header size | |
| 43 | ||
| 44 | st = avformat_new_stream(s, NULL); | |
| 45 | if (!st) | |
| 46 | return AVERROR(ENOMEM); | |
| 47 | ||
| 48 | ||
| 49 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; | |
| 50 | st->codec->codec_tag = avio_rl32(s->pb); | |
| 51 | st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag); | |
| 52 | st->codec->width = avio_rl16(s->pb); | |
| 53 | st->codec->height = avio_rl16(s->pb); | |
| 54 | time_base.den = avio_rl32(s->pb); | |
| 55 | time_base.num = avio_rl32(s->pb); | |
| 56 | st->duration = avio_rl64(s->pb); | |
| 57 | ||
| 58 | st->need_parsing = AVSTREAM_PARSE_HEADERS; | |
| 59 | ||
| 60 | if (!time_base.den || !time_base.num) { | |
| 61 | av_log(s, AV_LOG_ERROR, "Invalid frame rate\n"); | |
| 62 | return AVERROR_INVALIDDATA; | |
| 63 | } | |
| 64 | ||
| 65 | avpriv_set_pts_info(st, 64, time_base.num, time_base.den); | |
| 66 | ||
| 67 | return 0; | |
| 68 | } | |
| 69 | ||
| 70 | static int read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 71 | { | |
| 72 | int ret, size = avio_rl32(s->pb); | |
| 73 | int64_t pts = avio_rl64(s->pb); | |
| 74 | ||
| 75 | ret = av_get_packet(s->pb, pkt, size); | |
| 76 | pkt->stream_index = 0; | |
| 77 | pkt->pts = pts; | |
| 78 | pkt->pos -= 12; | |
| 79 | ||
| 80 | return ret; | |
| 81 | } | |
| 82 | ||
| 83 | AVInputFormat ff_ivf_demuxer = { | |
| 84 | .name = "ivf", | |
| 85 | .long_name = NULL_IF_CONFIG_SMALL("On2 IVF"), | |
| 86 | .read_probe = probe, | |
| 87 | .read_header = read_header, | |
| 88 | .read_packet = read_packet, | |
| 89 | .flags = AVFMT_GENERIC_INDEX, | |
| 90 | .codec_tag = (const AVCodecTag* const []){ ff_codec_bmp_tags, 0 }, | |
| 91 | }; |