1/* 2 * QuickDraw (qdrw) codec 3 * Copyright (c) 2004 Konstantin Shishkov 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 libavcodec/qdrw.c 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 const uint8_t *buf, int buf_size) 38{ 39 QdrawContext * const a = avctx->priv_data; 40 AVFrame * const p= (AVFrame*)&a->pic; 41 uint8_t* outdata; 42 int colors; 43 int i; 44 uint32_t *pal; 45 int r, g, b; 46 47 if(p->data[0]) 48 avctx->release_buffer(avctx, p); 49 50 p->reference= 0; 51 if(avctx->get_buffer(avctx, p) < 0){ 52 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); 53 return -1; 54 } 55 p->pict_type= FF_I_TYPE; 56 p->key_frame= 1; 57 58 outdata = a->pic.data[0]; 59 60 buf += 0x68; /* jump to palette */ 61 colors = AV_RB32(buf); 62 buf += 4; 63 64 if(colors < 0 || colors > 256) { 65 av_log(avctx, AV_LOG_ERROR, "Error color count - %i(0x%X)\n", colors, colors); 66 return -1; 67 } 68 69 pal = (uint32_t*)p->data[1]; 70 for (i = 0; i <= colors; i++) { 71 unsigned int idx; 72 idx = AV_RB16(buf); /* color index */ 73 buf += 2; 74 75 if (idx > 255) { 76 av_log(avctx, AV_LOG_ERROR, "Palette index out of range: %u\n", idx); 77 buf += 6; 78 continue; 79 } 80 r = *buf++; 81 buf++; 82 g = *buf++; 83 buf++; 84 b = *buf++; 85 buf++; 86 pal[idx] = (r << 16) | (g << 8) | b; 87 } 88 p->palette_has_changed = 1; 89 90 buf += 18; /* skip unneeded data */ 91 for (i = 0; i < avctx->height; i++) { 92 int size, left, code, pix; 93 const uint8_t *next; 94 uint8_t *out; 95 int tsize = 0; 96 97 /* decode line */ 98 out = outdata; 99 size = AV_RB16(buf); /* size of packed line */ 100 buf += 2; 101 left = size; 102 next = buf + size; 103 while (left > 0) { 104 code = *buf++; 105 if (code & 0x80 ) { /* run */ 106 pix = *buf++; 107 if ((out + (257 - code)) > (outdata + a->pic.linesize[0])) 108 break; 109 memset(out, pix, 257 - code); 110 out += 257 - code; 111 tsize += 257 - code; 112 left -= 2; 113 } else { /* copy */ 114 if ((out + code) > (outdata + a->pic.linesize[0])) 115 break; 116 memcpy(out, buf, code + 1); 117 out += code + 1; 118 buf += code + 1; 119 left -= 2 + code; 120 tsize += code + 1; 121 } 122 } 123 buf = next; 124 outdata += a->pic.linesize[0]; 125 } 126 127 *data_size = sizeof(AVFrame); 128 *(AVFrame*)data = a->pic; 129 130 return buf_size; 131} 132 133static av_cold int decode_init(AVCodecContext *avctx){ 134// QdrawContext * const a = avctx->priv_data; 135 136 if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) { 137 return 1; 138 } 139 140 avctx->pix_fmt= PIX_FMT_PAL8; 141 142 return 0; 143} 144 145AVCodec qdraw_decoder = { 146 "qdraw", 147 CODEC_TYPE_VIDEO, 148 CODEC_ID_QDRAW, 149 sizeof(QdrawContext), 150 decode_init, 151 NULL, 152 NULL, 153 decode_frame, 154 CODEC_CAP_DR1, 155 .long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"), 156}; 157