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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * QuickDraw (qdrw) codec |
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| 3 | * Copyright (c) 2004 Konstantin Shishkov |
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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 | /** |
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| 23 | * @file |
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| 24 | * Apple QuickDraw codec. |
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| 25 | */ |
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| 26 | |||
| 27 | #include "libavutil/common.h" |
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| 28 | #include "libavutil/intreadwrite.h" |
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| 29 | #include "avcodec.h" |
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| 30 | #include "internal.h" |
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| 31 | |||
| 32 | static int decode_frame(AVCodecContext *avctx, |
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| 33 | void *data, int *got_frame, |
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| 34 | AVPacket *avpkt) |
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| 35 | { |
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| 36 | const uint8_t *buf = avpkt->data; |
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| 37 | const uint8_t *buf_end = avpkt->data + avpkt->size; |
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| 38 | int buf_size = avpkt->size; |
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| 39 | AVFrame * const p = data; |
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| 40 | uint8_t* outdata; |
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| 41 | int colors; |
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| 42 | int i, ret; |
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| 43 | uint32_t *pal; |
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| 44 | int r, g, b; |
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| 45 | |||
| 46 | if ((ret = ff_get_buffer(avctx, p, 0)) < 0) |
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| 47 | return ret; |
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| 48 | p->pict_type = AV_PICTURE_TYPE_I; |
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| 49 | p->key_frame = 1; |
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| 50 | |||
| 51 | outdata = p->data[0]; |
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| 52 | |||
| 53 | if (buf_end - buf < 0x68 + 4) |
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| 54 | return AVERROR_INVALIDDATA; |
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| 55 | buf += 0x68; /* jump to palette */ |
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| 56 | colors = AV_RB32(buf); |
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| 57 | buf += 4; |
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| 58 | |||
| 59 | if (colors < 0 || colors > 256) { |
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| 60 | av_log(avctx, AV_LOG_ERROR, "Error color count - %i(0x%X)\n", colors, colors); |
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| 61 | return AVERROR_INVALIDDATA; |
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| 62 | } |
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| 63 | if (buf_end - buf < (colors + 1) * 8) |
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| 64 | return AVERROR_INVALIDDATA; |
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| 65 | |||
| 66 | pal = (uint32_t*)p->data[1]; |
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| 67 | for (i = 0; i <= colors; i++) { |
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| 68 | unsigned int idx; |
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| 69 | idx = AV_RB16(buf); /* color index */ |
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| 70 | buf += 2; |
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| 71 | |||
| 72 | if (idx > 255) { |
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| 73 | av_log(avctx, AV_LOG_ERROR, "Palette index out of range: %u\n", idx); |
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| 74 | buf += 6; |
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| 75 | continue; |
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| 76 | } |
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| 77 | r = *buf++; |
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| 78 | buf++; |
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| 79 | g = *buf++; |
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| 80 | buf++; |
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| 81 | b = *buf++; |
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| 82 | buf++; |
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| 83 | pal[idx] = 0xFFU << 24 | r << 16 | g << 8 | b; |
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| 84 | } |
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| 85 | p->palette_has_changed = 1; |
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| 86 | |||
| 87 | if (buf_end - buf < 18) |
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| 88 | return AVERROR_INVALIDDATA; |
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| 89 | buf += 18; /* skip unneeded data */ |
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| 90 | for (i = 0; i < avctx->height; i++) { |
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| 91 | int size, left, code, pix; |
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| 92 | const uint8_t *next; |
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| 93 | uint8_t *out; |
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| 94 | int tsize = 0; |
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| 95 | |||
| 96 | /* decode line */ |
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| 97 | out = outdata; |
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| 98 | size = AV_RB16(buf); /* size of packed line */ |
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| 99 | buf += 2; |
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| 100 | if (buf_end - buf < size) |
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| 101 | return AVERROR_INVALIDDATA; |
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| 102 | |||
| 103 | left = size; |
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| 104 | next = buf + size; |
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| 105 | while (left > 0) { |
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| 106 | code = *buf++; |
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| 107 | if (code & 0x80 ) { /* run */ |
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| 108 | pix = *buf++; |
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| 109 | if ((out + (257 - code)) > (outdata + p->linesize[0])) |
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| 110 | break; |
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| 111 | memset(out, pix, 257 - code); |
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| 112 | out += 257 - code; |
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| 113 | tsize += 257 - code; |
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| 114 | left -= 2; |
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| 115 | } else { /* copy */ |
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| 116 | if ((out + code) > (outdata + p->linesize[0])) |
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| 117 | break; |
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| 118 | if (buf_end - buf < code + 1) |
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| 119 | return AVERROR_INVALIDDATA; |
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| 120 | memcpy(out, buf, code + 1); |
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| 121 | out += code + 1; |
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| 122 | buf += code + 1; |
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| 123 | left -= 2 + code; |
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| 124 | tsize += code + 1; |
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| 125 | } |
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| 126 | } |
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| 127 | buf = next; |
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| 128 | outdata += p->linesize[0]; |
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| 129 | } |
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| 130 | |||
| 131 | *got_frame = 1; |
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| 132 | |||
| 133 | return buf_size; |
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| 134 | } |
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| 135 | |||
| 136 | static av_cold int decode_init(AVCodecContext *avctx) |
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| 137 | { |
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| 138 | avctx->pix_fmt= AV_PIX_FMT_PAL8; |
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| 139 | |||
| 140 | return 0; |
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| 141 | } |
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| 142 | |||
| 143 | AVCodec ff_qdraw_decoder = { |
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| 144 | .name = "qdraw", |
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| 145 | .long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"), |
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| 146 | .type = AVMEDIA_TYPE_VIDEO, |
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| 147 | .id = AV_CODEC_ID_QDRAW, |
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| 148 | .init = decode_init, |
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| 149 | .decode = decode_frame, |
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| 150 | .capabilities = CODEC_CAP_DR1, |
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| 151 | }; |