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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2009 Michael Niedermayer |
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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 | |||
| 24 | |||
| 25 | static int probe(AVProbeData *p) |
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| 26 | { |
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| 27 | // the single file I have starts with that, I do not know if others do, too |
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| 28 | if( p->buf[0] == 1 |
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| 29 | && p->buf[1] == 1 |
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| 30 | && p->buf[2] == 3 |
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| 31 | && p->buf[3] == 0xB8 |
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| 32 | && p->buf[4] == 0x80 |
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| 33 | && p->buf[5] == 0x60 |
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| 34 | ) |
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| 35 | return AVPROBE_SCORE_MAX-2; |
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| 36 | |||
| 37 | return 0; |
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| 38 | } |
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| 39 | |||
| 40 | static int read_header(AVFormatContext *s) |
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| 41 | { |
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| 42 | AVStream *st; |
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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 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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| 49 | st->codec->codec_id = AV_CODEC_ID_MPEG4; |
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| 50 | st->need_parsing = AVSTREAM_PARSE_FULL; |
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| 51 | avpriv_set_pts_info(st, 64, 1, 90000); |
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| 52 | |||
| 53 | return 0; |
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| 54 | |||
| 55 | } |
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| 56 | |||
| 57 | static int read_packet(AVFormatContext *s, AVPacket *pkt) |
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| 58 | { |
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| 59 | int ret, size, pts, type, flags; |
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| 60 | int first_pkt = 0; |
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| 61 | int frame_complete = 0; |
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| 62 | |||
| 63 | while (!frame_complete) { |
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| 64 | |||
| 65 | type = avio_rb16(s->pb); // 257 or 258 |
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| 66 | size = avio_rb16(s->pb); |
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| 67 | flags = avio_rb16(s->pb); //some flags, 0x80 indicates end of frame |
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| 68 | avio_rb16(s->pb); //packet number |
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| 69 | pts = avio_rb32(s->pb); |
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| 70 | avio_rb32(s->pb); //6A 13 E3 88 |
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| 71 | |||
| 72 | frame_complete = flags & 0x80; |
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| 73 | |||
| 74 | size -= 12; |
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| 75 | if (size < 1) |
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| 76 | return -1; |
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| 77 | |||
| 78 | if (type == 258) { |
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| 79 | avio_skip(s->pb, size); |
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| 80 | frame_complete = 0; |
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| 81 | continue; |
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| 82 | } |
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| 83 | |||
| 84 | if (!first_pkt) { |
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| 85 | ret = av_get_packet(s->pb, pkt, size); |
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| 86 | if (ret < 0) |
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| 87 | return ret; |
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| 88 | first_pkt = 1; |
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| 89 | pkt->pts = pts; |
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| 90 | pkt->pos -= 16; |
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| 91 | } else { |
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| 92 | ret = av_append_packet(s->pb, pkt, size); |
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| 93 | if (ret < 0) { |
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| 94 | av_log(s, AV_LOG_ERROR, "failed to grow packet\n"); |
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| 95 | av_free_packet(pkt); |
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| 96 | return ret; |
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| 97 | } |
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| 98 | } |
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| 99 | if (ret < size) { |
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| 100 | av_log(s, AV_LOG_ERROR, "Truncated packet! Read %d of %d bytes\n", |
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| 101 | ret, size); |
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| 102 | pkt->flags |= AV_PKT_FLAG_CORRUPT; |
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| 103 | break; |
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| 104 | } |
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| 105 | } |
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| 106 | pkt->stream_index = 0; |
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| 107 | |||
| 108 | return 0; |
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| 109 | } |
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| 110 | |||
| 111 | AVInputFormat ff_iv8_demuxer = { |
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| 112 | .name = "iv8", |
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| 113 | .long_name = NULL_IF_CONFIG_SMALL("IndigoVision 8000 video"), |
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| 114 | .read_probe = probe, |
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| 115 | .read_header = read_header, |
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| 116 | .read_packet = read_packet, |
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| 117 | .flags = AVFMT_GENERIC_INDEX, |
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| 118 | }; |