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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6147 | serge | 1 | /* |
| 2 | * Alias PIX image demuxer |
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| 3 | * Copyright (c) 2014 Michael Niedermayer |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | #include "img2.h" |
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| 23 | #include "libavcodec/bytestream.h" |
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| 24 | |||
| 25 | static int alias_pix_read_probe(AVProbeData *p) |
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| 26 | { |
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| 27 | const uint8_t *b = p->buf; |
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| 28 | const uint8_t *end = b + p->buf_size; |
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| 29 | int width = bytestream_get_be16(&b); |
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| 30 | int height = bytestream_get_be16(&b); |
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| 31 | av_unused int ox = bytestream_get_be16(&b); |
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| 32 | av_unused int oy = bytestream_get_be16(&b); |
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| 33 | int bpp = bytestream_get_be16(&b); |
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| 34 | int x, y; |
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| 35 | |||
| 36 | if (!width || !height) |
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| 37 | return 0; |
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| 38 | |||
| 39 | if (bpp != 24 && bpp != 8) |
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| 40 | return 0; |
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| 41 | |||
| 42 | for (y=0; y<2 && y |
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| 43 | for (x=0; x |
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| 44 | int count = *b++; |
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| 45 | if (count == 0 || x + count > width) |
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| 46 | return 0; |
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| 47 | if (b > end) |
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| 48 | return AVPROBE_SCORE_MAX / 8; |
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| 49 | b += bpp / 8; |
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| 50 | x += count; |
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| 51 | } |
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| 52 | } |
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| 53 | |||
| 54 | return AVPROBE_SCORE_EXTENSION + 1; |
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| 55 | } |
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| 56 | |||
| 57 | static const AVClass image2_alias_pix_class = { |
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| 58 | .class_name = "alias_pix demuxer", |
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| 59 | .item_name = av_default_item_name, |
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| 60 | .option = ff_img_options, |
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| 61 | .version = LIBAVUTIL_VERSION_INT, |
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| 62 | }; |
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| 63 | |||
| 64 | AVInputFormat ff_image2_alias_pix_demuxer = { |
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| 65 | .name = "alias_pix", |
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| 66 | .long_name = NULL_IF_CONFIG_SMALL("Alias/Wavefront PIX image"), |
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| 67 | .priv_data_size = sizeof(VideoDemuxData), |
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| 68 | .read_probe = alias_pix_read_probe, |
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| 69 | .read_header = ff_img_read_header, |
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| 70 | .read_packet = ff_img_read_packet, |
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| 71 | .raw_codec_id = AV_CODEC_ID_ALIAS_PIX, |
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| 72 | .priv_class = &image2_alias_pix_class, |
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| 73 | }; |