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/*
* 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,
};
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