1/* 2 * QuickDraw (qdrw) codec 3 * Copyright (c) 2004 Konstantin Shishkov 4 * 5 * This file is part of Libav. 6 * 7 * Libav 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 * Libav 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 Libav; 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 * Apple QuickDraw codec. 25 */ 26 27#include "libavutil/intreadwrite.h" 28#include "avcodec.h" 29 30typedef struct QdrawContext{ 31 AVCodecContext *avctx; 32 AVFrame pic; 33} QdrawContext; 34 35static int decode_frame(AVCodecContext *avctx, 36 void *data, int *data_size, 37 AVPacket *avpkt) 38{ 39 const uint8_t *buf = avpkt->data; 40 const uint8_t *buf_end = avpkt->data + avpkt->size; 41 int buf_size = avpkt->size; 42 QdrawContext * const a = avctx->priv_data; 43 AVFrame * const p= (AVFrame*)&a->pic; 44 uint8_t* outdata; 45 int colors; 46 int i; 47 uint32_t *pal; 48 int r, g, b; 49 50 if(p->data[0]) 51 avctx->release_buffer(avctx, p); 52 53 p->reference= 0; 54 if(avctx->get_buffer(avctx, p) < 0){ 55 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); 56 return -1; 57 } 58 p->pict_type= AV_PICTURE_TYPE_I; 59 p->key_frame= 1; 60 61 outdata = a->pic.data[0]; 62 63 if (buf_end - buf < 0x68 + 4) 64 return AVERROR_INVALIDDATA; 65 buf += 0x68; /* jump to palette */ 66 colors = AV_RB32(buf); 67 buf += 4; 68 69 if(colors < 0 || colors > 256) { 70 av_log(avctx, AV_LOG_ERROR, "Error color count - %i(0x%X)\n", colors, colors); 71 return -1; 72 } 73 if (buf_end - buf < (colors + 1) * 8) 74 return AVERROR_INVALIDDATA; 75 76 pal = (uint32_t*)p->data[1]; 77 for (i = 0; i <= colors; i++) { 78 unsigned int idx; 79 idx = AV_RB16(buf); /* color index */ 80 buf += 2; 81 82 if (idx > 255) { 83 av_log(avctx, AV_LOG_ERROR, "Palette index out of range: %u\n", idx); 84 buf += 6; 85 continue; 86 } 87 r = *buf++; 88 buf++; 89 g = *buf++; 90 buf++; 91 b = *buf++; 92 buf++; 93 pal[idx] = (r << 16) | (g << 8) | b; 94 } 95 p->palette_has_changed = 1; 96 97 if (buf_end - buf < 18) 98 return AVERROR_INVALIDDATA; 99 buf += 18; /* skip unneeded data */ 100 for (i = 0; i < avctx->height; i++) { 101 int size, left, code, pix; 102 const uint8_t *next; 103 uint8_t *out; 104 int tsize = 0; 105 106 /* decode line */ 107 out = outdata; 108 size = AV_RB16(buf); /* size of packed line */ 109 buf += 2; 110 if (buf_end - buf < size) 111 return AVERROR_INVALIDDATA; 112 113 left = size; 114 next = buf + size; 115 while (left > 0) { 116 code = *buf++; 117 if (code & 0x80 ) { /* run */ 118 pix = *buf++; 119 if ((out + (257 - code)) > (outdata + a->pic.linesize[0])) 120 break; 121 memset(out, pix, 257 - code); 122 out += 257 - code; 123 tsize += 257 - code; 124 left -= 2; 125 } else { /* copy */ 126 if ((out + code) > (outdata + a->pic.linesize[0])) 127 break; 128 if (buf_end - buf < code + 1) 129 return AVERROR_INVALIDDATA; 130 memcpy(out, buf, code + 1); 131 out += code + 1; 132 buf += code + 1; 133 left -= 2 + code; 134 tsize += code + 1; 135 } 136 } 137 buf = next; 138 outdata += a->pic.linesize[0]; 139 } 140 141 *data_size = sizeof(AVFrame); 142 *(AVFrame*)data = a->pic; 143 144 return buf_size; 145} 146 147static av_cold int decode_init(AVCodecContext *avctx){ 148// QdrawContext * const a = avctx->priv_data; 149 150 avctx->pix_fmt= PIX_FMT_PAL8; 151 152 return 0; 153} 154 155static av_cold int decode_end(AVCodecContext *avctx){ 156 QdrawContext * const a = avctx->priv_data; 157 AVFrame *pic = &a->pic; 158 159 if (pic->data[0]) 160 avctx->release_buffer(avctx, pic); 161 162 return 0; 163} 164 165AVCodec ff_qdraw_decoder = { 166 .name = "qdraw", 167 .type = AVMEDIA_TYPE_VIDEO, 168 .id = CODEC_ID_QDRAW, 169 .priv_data_size = sizeof(QdrawContext), 170 .init = decode_init, 171 .close = decode_end, 172 .decode = decode_frame, 173 .capabilities = CODEC_CAP_DR1, 174 .long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"), 175}; 176