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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2010 David Conrad |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | #include "avformat.h" |
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| 22 | #include "internal.h" |
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| 23 | #include "riff.h" |
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| 24 | #include "libavutil/intreadwrite.h" |
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| 25 | |||
| 26 | static int probe(AVProbeData *p) |
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| 27 | { |
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| 28 | if (AV_RL32(p->buf) == MKTAG('D','K','I','F') |
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| 29 | && !AV_RL16(p->buf+4) && AV_RL16(p->buf+6) == 32) |
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| 30 | return AVPROBE_SCORE_MAX-2; |
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| 31 | |||
| 32 | return 0; |
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| 33 | } |
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| 34 | |||
| 35 | static int read_header(AVFormatContext *s) |
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| 36 | { |
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| 37 | AVStream *st; |
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| 38 | AVRational time_base; |
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| 39 | |||
| 40 | avio_rl32(s->pb); // DKIF |
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| 41 | avio_rl16(s->pb); // version |
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| 42 | avio_rl16(s->pb); // header size |
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| 43 | |||
| 44 | st = avformat_new_stream(s, NULL); |
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| 45 | if (!st) |
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| 46 | return AVERROR(ENOMEM); |
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| 47 | |||
| 48 | |||
| 49 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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| 50 | st->codec->codec_tag = avio_rl32(s->pb); |
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| 51 | st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag); |
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| 52 | st->codec->width = avio_rl16(s->pb); |
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| 53 | st->codec->height = avio_rl16(s->pb); |
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| 54 | time_base.den = avio_rl32(s->pb); |
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| 55 | time_base.num = avio_rl32(s->pb); |
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| 56 | st->duration = avio_rl64(s->pb); |
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| 57 | |||
| 58 | st->need_parsing = AVSTREAM_PARSE_HEADERS; |
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| 59 | |||
| 60 | if (!time_base.den || !time_base.num) { |
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| 61 | av_log(s, AV_LOG_ERROR, "Invalid frame rate\n"); |
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| 62 | return AVERROR_INVALIDDATA; |
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| 63 | } |
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| 64 | |||
| 65 | avpriv_set_pts_info(st, 64, time_base.num, time_base.den); |
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| 66 | |||
| 67 | return 0; |
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| 68 | } |
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| 69 | |||
| 70 | static int read_packet(AVFormatContext *s, AVPacket *pkt) |
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| 71 | { |
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| 72 | int ret, size = avio_rl32(s->pb); |
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| 73 | int64_t pts = avio_rl64(s->pb); |
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| 74 | |||
| 75 | ret = av_get_packet(s->pb, pkt, size); |
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| 76 | pkt->stream_index = 0; |
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| 77 | pkt->pts = pts; |
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| 78 | pkt->pos -= 12; |
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| 79 | |||
| 80 | return ret; |
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| 81 | } |
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| 82 | |||
| 83 | AVInputFormat ff_ivf_demuxer = { |
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| 84 | .name = "ivf", |
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| 85 | .long_name = NULL_IF_CONFIG_SMALL("On2 IVF"), |
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| 86 | .read_probe = probe, |
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| 87 | .read_header = read_header, |
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| 88 | .read_packet = read_packet, |
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| 89 | .flags = AVFMT_GENERIC_INDEX, |
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| 90 | .codec_tag = (const AVCodecTag* const []){ ff_codec_bmp_tags, 0 }, |
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| 91 | }; |