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
23 * @file libavcodec/qdrw.c
24 * Apple QuickDraw codec.
27 #include "libavutil/intreadwrite.h"
30 typedef struct QdrawContext
{
31 AVCodecContext
*avctx
;
35 static int decode_frame(AVCodecContext
*avctx
,
36 void *data
, int *data_size
,
37 const uint8_t *buf
, int buf_size
)
39 QdrawContext
* const a
= avctx
->priv_data
;
40 AVFrame
* const p
= (AVFrame
*)&a
->pic
;
48 avctx
->release_buffer(avctx
, p
);
51 if(avctx
->get_buffer(avctx
, p
) < 0){
52 av_log(avctx
, AV_LOG_ERROR
, "get_buffer() failed\n");
55 p
->pict_type
= FF_I_TYPE
;
58 outdata
= a
->pic
.data
[0];
60 buf
+= 0x68; /* jump to palette */
61 colors
= AV_RB32(buf
);
64 if(colors
< 0 || colors
> 256) {
65 av_log(avctx
, AV_LOG_ERROR
, "Error color count - %i(0x%X)\n", colors
, colors
);
69 pal
= (uint32_t*)p
->data
[1];
70 for (i
= 0; i
<= colors
; i
++) {
72 idx
= AV_RB16(buf
); /* color index */
76 av_log(avctx
, AV_LOG_ERROR
, "Palette index out of range: %u\n", idx
);
86 pal
[idx
] = (r
<< 16) | (g
<< 8) | b
;
88 p
->palette_has_changed
= 1;
90 buf
+= 18; /* skip unneeded data */
91 for (i
= 0; i
< avctx
->height
; i
++) {
92 int size
, left
, code
, pix
;
99 size
= AV_RB16(buf
); /* size of packed line */
105 if (code
& 0x80 ) { /* run */
107 if ((out
+ (257 - code
)) > (outdata
+ a
->pic
.linesize
[0]))
109 memset(out
, pix
, 257 - code
);
114 if ((out
+ code
) > (outdata
+ a
->pic
.linesize
[0]))
116 memcpy(out
, buf
, code
+ 1);
124 outdata
+= a
->pic
.linesize
[0];
127 *data_size
= sizeof(AVFrame
);
128 *(AVFrame
*)data
= a
->pic
;
133 static av_cold
int decode_init(AVCodecContext
*avctx
){
134 // QdrawContext * const a = avctx->priv_data;
136 if (avcodec_check_dimensions(avctx
, avctx
->width
, avctx
->height
) < 0) {
140 avctx
->pix_fmt
= PIX_FMT_PAL8
;
145 AVCodec qdraw_decoder
= {
149 sizeof(QdrawContext
),
155 .long_name
= NULL_IF_CONFIG_SMALL("Apple QuickDraw"),