repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * Copyright (c) 2009 Michael Niedermayer | |
| 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 | ||
| 24 | ||
| 25 | static int probe(AVProbeData *p) | |
| 26 | { | |
| 27 | // the single file I have starts with that, I do not know if others do, too | |
| 28 | if( p->buf[0] == 1 | |
| 29 | && p->buf[1] == 1 | |
| 30 | && p->buf[2] == 3 | |
| 31 | && p->buf[3] == 0xB8 | |
| 32 | && p->buf[4] == 0x80 | |
| 33 | && p->buf[5] == 0x60 | |
| 34 | ) | |
| 35 | return AVPROBE_SCORE_MAX-2; | |
| 36 | ||
| 37 | return 0; | |
| 38 | } | |
| 39 | ||
| 40 | static int read_header(AVFormatContext *s) | |
| 41 | { | |
| 42 | AVStream *st; | |
| 43 | ||
| 44 | st = avformat_new_stream(s, NULL); | |
| 45 | if (!st) | |
| 46 | return AVERROR(ENOMEM); | |
| 47 | ||
| 48 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; | |
| 49 | st->codec->codec_id = AV_CODEC_ID_MPEG4; | |
| 50 | st->need_parsing = AVSTREAM_PARSE_FULL; | |
| 51 | avpriv_set_pts_info(st, 64, 1, 90000); | |
| 52 | ||
| 53 | return 0; | |
| 54 | ||
| 55 | } | |
| 56 | ||
| 57 | static int read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 58 | { | |
| 59 | int ret, size, pts, type, flags; | |
| 60 | int first_pkt = 0; | |
| 61 | int frame_complete = 0; | |
| 62 | ||
| 63 | while (!frame_complete) { | |
| 64 | ||
| 65 | type = avio_rb16(s->pb); // 257 or 258 | |
| 66 | size = avio_rb16(s->pb); | |
| 67 | flags = avio_rb16(s->pb); //some flags, 0x80 indicates end of frame | |
| 68 | avio_rb16(s->pb); //packet number | |
| 69 | pts = avio_rb32(s->pb); | |
| 70 | avio_rb32(s->pb); //6A 13 E3 88 | |
| 71 | ||
| 72 | frame_complete = flags & 0x80; | |
| 73 | ||
| 74 | size -= 12; | |
| 75 | if (size < 1) | |
| 76 | return -1; | |
| 77 | ||
| 78 | if (type == 258) { | |
| 79 | avio_skip(s->pb, size); | |
| 80 | frame_complete = 0; | |
| 81 | continue; | |
| 82 | } | |
| 83 | ||
| 84 | if (!first_pkt) { | |
| 85 | ret = av_get_packet(s->pb, pkt, size); | |
| 86 | if (ret < 0) | |
| 87 | return ret; | |
| 88 | first_pkt = 1; | |
| 89 | pkt->pts = pts; | |
| 90 | pkt->pos -= 16; | |
| 91 | } else { | |
| 92 | ret = av_append_packet(s->pb, pkt, size); | |
| 93 | if (ret < 0) { | |
| 94 | av_log(s, AV_LOG_ERROR, "failed to grow packet\n"); | |
| 95 | av_free_packet(pkt); | |
| 96 | return ret; | |
| 97 | } | |
| 98 | } | |
| 99 | if (ret < size) { | |
| 100 | av_log(s, AV_LOG_ERROR, "Truncated packet! Read %d of %d bytes\n", | |
| 101 | ret, size); | |
| 102 | pkt->flags |= AV_PKT_FLAG_CORRUPT; | |
| 103 | break; | |
| 104 | } | |
| 105 | } | |
| 106 | pkt->stream_index = 0; | |
| 107 | ||
| 108 | return 0; | |
| 109 | } | |
| 110 | ||
| 111 | AVInputFormat ff_iv8_demuxer = { | |
| 112 | .name = "iv8", | |
| 113 | .long_name = NULL_IF_CONFIG_SMALL("IndigoVision 8000 video"), | |
| 114 | .read_probe = probe, | |
| 115 | .read_header = read_header, | |
| 116 | .read_packet = read_packet, | |
| 117 | .flags = AVFMT_GENERIC_INDEX, | |
| 118 | }; |