| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Quicktime Planar RGB (8BPS) Video Decoder | ||
| 3 | * Copyright (C) 2003 Roberto Togni | ||
| 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 | /** | ||
| 23 | * @file | ||
| 24 | * QT 8BPS Video Decoder by Roberto Togni | ||
| 25 | * For more information about the 8BPS format, visit: | ||
| 26 | * http://www.pcisys.net/~melanson/codecs/ | ||
| 27 | * | ||
| 28 | * Supports: PAL8 (RGB 8bpp, paletted) | ||
| 29 | * : GBRP (RGB 24bpp) | ||
| 30 | * : GBRAP (RGB 32bpp, 4th plane is alpha) | ||
| 31 | */ | ||
| 32 | |||
| 33 | #include <string.h> | ||
| 34 | |||
| 35 | #include "libavutil/intreadwrite.h" | ||
| 36 | #include "libavutil/internal.h" | ||
| 37 | #include "avcodec.h" | ||
| 38 | #include "codec_internal.h" | ||
| 39 | #include "decode.h" | ||
| 40 | |||
| 41 | typedef struct EightBpsContext { | ||
| 42 | AVCodecContext *avctx; | ||
| 43 | |||
| 44 | uint8_t planes; | ||
| 45 | uint8_t planemap[4]; | ||
| 46 | } EightBpsContext; | ||
| 47 | |||
| 48 | 13 | static int decode_frame(AVCodecContext *avctx, AVFrame *frame, | |
| 49 | int *got_frame, AVPacket *avpkt) | ||
| 50 | { | ||
| 51 | 13 | const uint8_t *buf = avpkt->data; | |
| 52 | 13 | int buf_size = avpkt->size; | |
| 53 | 13 | EightBpsContext * const c = avctx->priv_data; | |
| 54 | 13 | const uint8_t *encoded = buf; | |
| 55 | uint8_t *pixptr, *pixptr_end; | ||
| 56 | 13 | unsigned int height = avctx->height; // Real image height | |
| 57 | unsigned int dlen, p, row; | ||
| 58 | const uint8_t *lp, *dp, *ep; | ||
| 59 | uint8_t count; | ||
| 60 | 13 | const uint8_t *planemap = c->planemap; | |
| 61 | 13 | unsigned int planes = c->planes; | |
| 62 | int ret; | ||
| 63 | |||
| 64 |
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13 | if (buf_size < planes * height * 2) |
| 65 | ✗ | return AVERROR_INVALIDDATA; | |
| 66 | |||
| 67 |
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13 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| 68 | ✗ | return ret; | |
| 69 | |||
| 70 | 13 | ep = encoded + buf_size; | |
| 71 | |||
| 72 | /* Set data pointer after line lengths */ | ||
| 73 | 13 | dp = encoded + planes * (height << 1); | |
| 74 | |||
| 75 |
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25 | for (p = 0; p < planes; p++) { |
| 76 | 13 | const int pi = planemap[p]; | |
| 77 | /* Lines length pointer for this plane */ | ||
| 78 | 13 | lp = encoded + p * (height << 1); | |
| 79 | |||
| 80 | /* Decode a plane */ | ||
| 81 |
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3051 | for (row = 0; row < height; row++) { |
| 82 | 3039 | pixptr = frame->data[pi] + row * frame->linesize[pi]; | |
| 83 | 3039 | pixptr_end = pixptr + frame->linesize[pi]; | |
| 84 |
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3039 | if (ep - lp < row * 2 + 2) |
| 85 | ✗ | return AVERROR_INVALIDDATA; | |
| 86 | 3039 | dlen = AV_RB16(lp + row * 2); | |
| 87 | /* Decode a row of this plane */ | ||
| 88 |
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79145 | while (dlen > 0) { |
| 89 |
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76107 | if (ep - dp <= 1) |
| 90 | ✗ | return AVERROR_INVALIDDATA; | |
| 91 |
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76107 | if ((count = *dp++) <= 127) { |
| 92 | 37173 | count++; | |
| 93 | 37173 | dlen -= count + 1; | |
| 94 |
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37173 | if (pixptr_end - pixptr < count) |
| 95 | ✗ | break; | |
| 96 |
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37173 | if (ep - dp < count) |
| 97 | 1 | return AVERROR_INVALIDDATA; | |
| 98 | 37172 | memcpy(pixptr, dp, count); | |
| 99 | 37172 | pixptr += count; | |
| 100 | 37172 | dp += count; | |
| 101 | } else { | ||
| 102 | 38934 | count = 257 - count; | |
| 103 |
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38934 | if (pixptr_end - pixptr < count) |
| 104 | ✗ | break; | |
| 105 | 38934 | memset(pixptr, dp[0], count); | |
| 106 | 38934 | pixptr += count; | |
| 107 | 38934 | dp++; | |
| 108 | 38934 | dlen -= 2; | |
| 109 | } | ||
| 110 | } | ||
| 111 | } | ||
| 112 | } | ||
| 113 | |||
| 114 |
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12 | if (avctx->bits_per_coded_sample <= 8) { |
| 115 | #if FF_API_PALETTE_HAS_CHANGED | ||
| 116 | FF_DISABLE_DEPRECATION_WARNINGS | ||
| 117 | 12 | frame->palette_has_changed = | |
| 118 | #endif | ||
| 119 | 12 | ff_copy_palette(frame->data[1], avpkt, avctx); | |
| 120 | #if FF_API_PALETTE_HAS_CHANGED | ||
| 121 | FF_ENABLE_DEPRECATION_WARNINGS | ||
| 122 | #endif | ||
| 123 | } | ||
| 124 | |||
| 125 | 12 | *got_frame = 1; | |
| 126 | |||
| 127 | /* always report that the buffer was completely consumed */ | ||
| 128 | 12 | return buf_size; | |
| 129 | } | ||
| 130 | |||
| 131 | 2 | static av_cold int decode_init(AVCodecContext *avctx) | |
| 132 | { | ||
| 133 | 2 | EightBpsContext * const c = avctx->priv_data; | |
| 134 | |||
| 135 | 2 | c->avctx = avctx; | |
| 136 | |||
| 137 |
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2 | switch (avctx->bits_per_coded_sample) { |
| 138 | 2 | case 8: | |
| 139 | 2 | avctx->pix_fmt = AV_PIX_FMT_PAL8; | |
| 140 | 2 | c->planes = 1; | |
| 141 | 2 | c->planemap[0] = 0; // 1st plane is palette indexes | |
| 142 | 2 | break; | |
| 143 | ✗ | case 24: | |
| 144 | ✗ | avctx->pix_fmt = AV_PIX_FMT_GBRP; | |
| 145 | ✗ | c->planes = 3; | |
| 146 | ✗ | c->planemap[0] = 2; // 1st plane is red | |
| 147 | ✗ | c->planemap[1] = 0; // 2nd plane is green | |
| 148 | ✗ | c->planemap[2] = 1; // 3rd plane is blue | |
| 149 | ✗ | break; | |
| 150 | ✗ | case 32: | |
| 151 | ✗ | avctx->pix_fmt = AV_PIX_FMT_GBRAP; | |
| 152 | ✗ | c->planes = 4; | |
| 153 | ✗ | break; | |
| 154 | ✗ | default: | |
| 155 | ✗ | av_log(avctx, AV_LOG_ERROR, "Error: Unsupported color depth: %u.\n", | |
| 156 | avctx->bits_per_coded_sample); | ||
| 157 | ✗ | return AVERROR_INVALIDDATA; | |
| 158 | } | ||
| 159 | |||
| 160 |
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2 | if (avctx->pix_fmt == AV_PIX_FMT_GBRAP) { |
| 161 | ✗ | c->planemap[0] = 2; // 1st plane is red | |
| 162 | ✗ | c->planemap[1] = 0; // 2nd plane is green | |
| 163 | ✗ | c->planemap[2] = 1; // 3rd plane is blue | |
| 164 | ✗ | c->planemap[3] = 3; // 4th plane is alpha | |
| 165 | } | ||
| 166 | 2 | return 0; | |
| 167 | } | ||
| 168 | |||
| 169 | const FFCodec ff_eightbps_decoder = { | ||
| 170 | .p.name = "8bps", | ||
| 171 | CODEC_LONG_NAME("QuickTime 8BPS video"), | ||
| 172 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 173 | .p.id = AV_CODEC_ID_8BPS, | ||
| 174 | .priv_data_size = sizeof(EightBpsContext), | ||
| 175 | .init = decode_init, | ||
| 176 | FF_CODEC_DECODE_CB(decode_frame), | ||
| 177 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
| 178 | }; | ||
| 179 |