mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-24 00:02:52 +00:00
d08d7142fd
courtesy of Konstantin Shishkov Originally committed as revision 3529 to svn://svn.ffmpeg.org/ffmpeg/trunk
154 lines
3.9 KiB
C
154 lines
3.9 KiB
C
/*
|
|
* QuickDraw (qdrw) codec
|
|
* Copyright (c) 2004 Konstantin Shishkov
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* @file qdrw.c
|
|
* Apple QuickDraw codec.
|
|
*/
|
|
|
|
#include "avcodec.h"
|
|
#include "mpegvideo.h"
|
|
|
|
typedef struct QdrawContext{
|
|
AVCodecContext *avctx;
|
|
AVFrame pic;
|
|
uint8_t palette[256*3];
|
|
} QdrawContext;
|
|
|
|
static int decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
uint8_t *buf, int buf_size)
|
|
{
|
|
QdrawContext * const a = avctx->priv_data;
|
|
AVFrame * const p= (AVFrame*)&a->pic;
|
|
uint8_t* outdata;
|
|
int colors;
|
|
int i;
|
|
|
|
/* special case for last picture */
|
|
if (buf_size == 0) {
|
|
return 0;
|
|
}
|
|
|
|
if(p->data[0])
|
|
avctx->release_buffer(avctx, p);
|
|
|
|
p->reference= 0;
|
|
if(avctx->get_buffer(avctx, p) < 0){
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
p->pict_type= I_TYPE;
|
|
p->key_frame= 1;
|
|
|
|
outdata = a->pic.data[0];
|
|
|
|
buf += 0x68; /* jump to palette */
|
|
colors = BE_32(buf);
|
|
buf += 4;
|
|
|
|
if(colors < 0 || colors > 256) {
|
|
av_log(avctx, AV_LOG_ERROR, "Error color count - %i(0x%X)\n", colors, colors);
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i <= colors; i++) {
|
|
int idx;
|
|
idx = BE_16(buf); /* color index */
|
|
buf += 2;
|
|
|
|
a->palette[idx * 3 + 0] = *buf++;
|
|
buf++;
|
|
a->palette[idx * 3 + 1] = *buf++;
|
|
buf++;
|
|
a->palette[idx * 3 + 2] = *buf++;
|
|
buf++;
|
|
}
|
|
|
|
if (colors)
|
|
a->pic.palette_has_changed = 1;
|
|
|
|
buf += 18; /* skip unneeded data */
|
|
for (i = 0; i < avctx->height; i++) {
|
|
int size, left, code, pix;
|
|
uint8_t *next;
|
|
uint8_t *out;
|
|
int tsize = 0;
|
|
|
|
/* decode line */
|
|
out = outdata;
|
|
size = BE_16(buf); /* size of packed line */
|
|
buf += 2;
|
|
left = size;
|
|
next = buf + size;
|
|
while (left > 0) {
|
|
code = *buf++;
|
|
if (code & 0x80 ) { /* run */
|
|
int i;
|
|
pix = *buf++;
|
|
for (i = 0; i < 257 - code; i++) {
|
|
*out++ = a->palette[pix * 3 + 0];
|
|
*out++ = a->palette[pix * 3 + 1];
|
|
*out++ = a->palette[pix * 3 + 2];
|
|
}
|
|
tsize += 257 - code;
|
|
left -= 2;
|
|
} else { /* copy */
|
|
int i, pix;
|
|
for (i = 0; i <= code; i++) {
|
|
pix = *buf++;
|
|
*out++ = a->palette[pix * 3 + 0];
|
|
*out++ = a->palette[pix * 3 + 1];
|
|
*out++ = a->palette[pix * 3 + 2];
|
|
}
|
|
left -= 2 + code;
|
|
tsize += code + 1;
|
|
}
|
|
}
|
|
buf = next;
|
|
outdata += a->pic.linesize[0];
|
|
}
|
|
|
|
*data_size = sizeof(AVFrame);
|
|
*(AVFrame*)data = a->pic;
|
|
|
|
return buf_size;
|
|
}
|
|
|
|
static int decode_init(AVCodecContext *avctx){
|
|
// QdrawContext * const a = avctx->priv_data;
|
|
|
|
avctx->pix_fmt= PIX_FMT_RGB24;
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec qdraw_decoder = {
|
|
"qdraw",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_QDRAW,
|
|
sizeof(QdrawContext),
|
|
decode_init,
|
|
NULL,
|
|
NULL,
|
|
decode_frame,
|
|
CODEC_CAP_DR1,
|
|
};
|