* QuickDraw (qdrw) codec
* Copyright (c) 2004 Konstantin Shishkov
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg 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
- *
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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,
+static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
uint8_t* outdata;
int colors;
int i;
-
+ uint32_t *pal;
+ int r, g, b;
+
if(p->data[0])
avctx->release_buffer(avctx, p);
p->key_frame= 1;
outdata = a->pic.data[0];
-
+
buf += 0x68; /* jump to palette */
- colors = BE_32(buf);
+ colors = AV_RB32(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;
}
-
+
+ pal = (uint32_t*)p->data[1];
for (i = 0; i <= colors; i++) {
- int idx;
- idx = BE_16(buf); /* color index */
+ unsigned int idx;
+ idx = AV_RB16(buf); /* color index */
buf += 2;
-
- a->palette[idx * 3 + 0] = *buf++;
+
+ if (idx > 255) {
+ av_log(avctx, AV_LOG_ERROR, "Palette index out of range: %u\n", idx);
+ buf += 6;
+ continue;
+ }
+ r = *buf++;
buf++;
- a->palette[idx * 3 + 1] = *buf++;
+ g = *buf++;
buf++;
- a->palette[idx * 3 + 2] = *buf++;
+ b = *buf++;
buf++;
+ pal[idx] = (r << 16) | (g << 8) | b;
}
-
- if (colors)
- a->pic.palette_has_changed = 1;
+ p->palette_has_changed = 1;
buf += 18; /* skip unneeded data */
for (i = 0; i < avctx->height; i++) {
uint8_t *next;
uint8_t *out;
int tsize = 0;
-
+
/* decode line */
out = outdata;
- size = BE_16(buf); /* size of packed line */
+ size = AV_RB16(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];
- }
+ if ((out + (257 - code)) > (outdata + a->pic.linesize[0]))
+ break;
+ memset(out, pix, 257 - code);
+ out += 257 - code;
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];
- }
+ if ((out + code) > (outdata + a->pic.linesize[0]))
+ break;
+ memcpy(out, buf, code + 1);
+ out += code + 1;
+ buf += code + 1;
left -= 2 + code;
tsize += code + 1;
}
*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;
+ if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
+ return 1;
+ }
+
+ avctx->pix_fmt= PIX_FMT_PAL8;
return 0;
}