repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * Alias PIX image demuxer | |
| 3 | * Copyright (c) 2014 Michael Niedermayer | |
| 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 | #include "img2.h" | |
| 23 | #include "libavcodec/bytestream.h" | |
| 24 | ||
| 25 | static int alias_pix_read_probe(AVProbeData *p) | |
| 26 | { | |
| 27 | const uint8_t *b = p->buf; | |
| 28 | const uint8_t *end = b + p->buf_size; | |
| 29 | int width = bytestream_get_be16(&b); | |
| 30 | int height = bytestream_get_be16(&b); | |
| 31 | av_unused int ox = bytestream_get_be16(&b); | |
| 32 | av_unused int oy = bytestream_get_be16(&b); | |
| 33 | int bpp = bytestream_get_be16(&b); | |
| 34 | int x, y; | |
| 35 | ||
| 36 | if (!width || !height) | |
| 37 | return 0; | |
| 38 | ||
| 39 | if (bpp != 24 && bpp != 8) | |
| 40 | return 0; | |
| 41 | ||
| 42 | for (y=0; y<2 && y<height; y++) { | |
| 43 | for (x=0; x<width; ) { | |
| 44 | int count = *b++; | |
| 45 | if (count == 0 || x + count > width) | |
| 46 | return 0; | |
| 47 | if (b > end) | |
| 48 | return AVPROBE_SCORE_MAX / 8; | |
| 49 | b += bpp / 8; | |
| 50 | x += count; | |
| 51 | } | |
| 52 | } | |
| 53 | ||
| 54 | return AVPROBE_SCORE_EXTENSION + 1; | |
| 55 | } | |
| 56 | ||
| 57 | static const AVClass image2_alias_pix_class = { | |
| 58 | .class_name = "alias_pix demuxer", | |
| 59 | .item_name = av_default_item_name, | |
| 60 | .option = ff_img_options, | |
| 61 | .version = LIBAVUTIL_VERSION_INT, | |
| 62 | }; | |
| 63 | ||
| 64 | AVInputFormat ff_image2_alias_pix_demuxer = { | |
| 65 | .name = "alias_pix", | |
| 66 | .long_name = NULL_IF_CONFIG_SMALL("Alias/Wavefront PIX image"), | |
| 67 | .priv_data_size = sizeof(VideoDemuxData), | |
| 68 | .read_probe = alias_pix_read_probe, | |
| 69 | .read_header = ff_img_read_header, | |
| 70 | .read_packet = ff_img_read_packet, | |
| 71 | .raw_codec_id = AV_CODEC_ID_ALIAS_PIX, | |
| 72 | .priv_class = &image2_alias_pix_class, | |
| 73 | }; |