2 * QuickDraw (qdrw) codec
3 * Copyright (c) 2004 Konstantin Shishkov
5 * This file is part of FFmpeg.
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.
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.
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
24 * Apple QuickDraw codec.
27 #include "libavutil/common.h"
28 #include "libavutil/intreadwrite.h"
32 typedef struct QdrawContext{
33 AVCodecContext *avctx;
37 static int decode_frame(AVCodecContext *avctx,
38 void *data, int *got_frame,
41 const uint8_t *buf = avpkt->data;
42 const uint8_t *buf_end = avpkt->data + avpkt->size;
43 int buf_size = avpkt->size;
44 QdrawContext * const a = avctx->priv_data;
45 AVFrame * const p = &a->pic;
53 avctx->release_buffer(avctx, p);
56 if(ff_get_buffer(avctx, p) < 0){
57 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
60 p->pict_type= AV_PICTURE_TYPE_I;
63 outdata = a->pic.data[0];
65 if (buf_end - buf < 0x68 + 4)
66 return AVERROR_INVALIDDATA;
67 buf += 0x68; /* jump to palette */
68 colors = AV_RB32(buf);
71 if(colors < 0 || colors > 256) {
72 av_log(avctx, AV_LOG_ERROR, "Error color count - %i(0x%X)\n", colors, colors);
75 if (buf_end - buf < (colors + 1) * 8)
76 return AVERROR_INVALIDDATA;
78 pal = (uint32_t*)p->data[1];
79 for (i = 0; i <= colors; i++) {
81 idx = AV_RB16(buf); /* color index */
85 av_log(avctx, AV_LOG_ERROR, "Palette index out of range: %u\n", idx);
95 pal[idx] = 0xFFU << 24 | r << 16 | g << 8 | b;
97 p->palette_has_changed = 1;
99 if (buf_end - buf < 18)
100 return AVERROR_INVALIDDATA;
101 buf += 18; /* skip unneeded data */
102 for (i = 0; i < avctx->height; i++) {
103 int size, left, code, pix;
110 size = AV_RB16(buf); /* size of packed line */
112 if (buf_end - buf < size)
113 return AVERROR_INVALIDDATA;
119 if (code & 0x80 ) { /* run */
121 if ((out + (257 - code)) > (outdata + a->pic.linesize[0]))
123 memset(out, pix, 257 - code);
128 if ((out + code) > (outdata + a->pic.linesize[0]))
130 if (buf_end - buf < code + 1)
131 return AVERROR_INVALIDDATA;
132 memcpy(out, buf, code + 1);
140 outdata += a->pic.linesize[0];
144 *(AVFrame*)data = a->pic;
149 static av_cold int decode_init(AVCodecContext *avctx){
150 QdrawContext * const a = avctx->priv_data;
152 avcodec_get_frame_defaults(&a->pic);
153 avctx->pix_fmt= AV_PIX_FMT_PAL8;
158 static av_cold int decode_end(AVCodecContext *avctx){
159 QdrawContext * const a = avctx->priv_data;
160 AVFrame *pic = &a->pic;
163 avctx->release_buffer(avctx, pic);
168 AVCodec ff_qdraw_decoder = {
170 .type = AVMEDIA_TYPE_VIDEO,
171 .id = AV_CODEC_ID_QDRAW,
172 .priv_data_size = sizeof(QdrawContext),
175 .decode = decode_frame,
176 .capabilities = CODEC_CAP_DR1,
177 .long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"),