* QuickDraw (qdrw) codec
* Copyright (c) 2004 Konstantin Shishkov
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * Libav 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,
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-
+
/**
- * @file qdrw.c
+ * @file
* Apple QuickDraw codec.
*/
-
-#include "avcodec.h"
-#include "mpegvideo.h"
-typedef struct QdrawContext{
- AVCodecContext *avctx;
- AVFrame pic;
- uint8_t palette[256*3];
-} QdrawContext;
+#include "libavutil/common.h"
+#include "libavutil/intreadwrite.h"
+#include "avcodec.h"
+#include "internal.h"
-static int decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
+static int decode_frame(AVCodecContext *avctx,
+ void *data, int *got_frame,
+ AVPacket *avpkt)
{
- QdrawContext * const a = avctx->priv_data;
- AVFrame * const p= (AVFrame*)&a->pic;
+ const uint8_t *buf = avpkt->data;
+ const uint8_t *buf_end = avpkt->data + avpkt->size;
+ int buf_size = avpkt->size;
+ AVFrame * const p = data;
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);
+ int i, ret;
+ uint32_t *pal;
+ int r, g, b;
- p->reference= 0;
- if(avctx->get_buffer(avctx, p) < 0){
+ if ((ret = ff_get_buffer(avctx, p, 0)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
+ return ret;
}
- 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) {
+ p->pict_type = AV_PICTURE_TYPE_I;
+ p->key_frame = 1;
+
+ outdata = p->data[0];
+
+ if (buf_end - buf < 0x68 + 4)
+ return AVERROR_INVALIDDATA;
+ buf += 0x68; /* jump to palette */
+ 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;
+ return AVERROR_INVALIDDATA;
}
-
+ if (buf_end - buf < (colors + 1) * 8)
+ return AVERROR_INVALIDDATA;
+
+ 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;
}
+ p->palette_has_changed = 1;
- if (colors)
- a->pic.palette_has_changed = 1;
-
+ if (buf_end - buf < 18)
+ return AVERROR_INVALIDDATA;
buf += 18; /* skip unneeded data */
for (i = 0; i < avctx->height; i++) {
int size, left, code, pix;
- uint8_t *next;
+ const uint8_t *next;
uint8_t *out;
int tsize = 0;
-
+
/* decode line */
- out = outdata;
- size = BE_16(buf); /* size of packed line */
+ out = outdata;
+ size = AV_RB16(buf); /* size of packed line */
buf += 2;
+ if (buf_end - buf < size)
+ return AVERROR_INVALIDDATA;
+
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 + p->linesize[0]))
+ break;
+ memset(out, pix, 257 - code);
+ out += 257 - code;
tsize += 257 - code;
- left -= 2;
+ 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;
+ if ((out + code) > (outdata + p->linesize[0]))
+ break;
+ if (buf_end - buf < code + 1)
+ return AVERROR_INVALIDDATA;
+ memcpy(out, buf, code + 1);
+ out += code + 1;
+ buf += code + 1;
+ left -= 2 + code;
tsize += code + 1;
}
}
buf = next;
- outdata += a->pic.linesize[0];
+ outdata += p->linesize[0];
}
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = a->pic;
-
+ *got_frame = 1;
+
return buf_size;
}
-static int decode_init(AVCodecContext *avctx){
-// QdrawContext * const a = avctx->priv_data;
-
- avctx->pix_fmt= PIX_FMT_RGB24;
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+ avctx->pix_fmt= AV_PIX_FMT_PAL8;
return 0;
}
-AVCodec qdraw_decoder = {
- "qdraw",
- CODEC_TYPE_VIDEO,
- CODEC_ID_QDRAW,
- sizeof(QdrawContext),
- decode_init,
- NULL,
- NULL,
- decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_qdraw_decoder = {
+ .name = "qdraw",
+ .long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_QDRAW,
+ .init = decode_init,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1,
};
projects / ffmpeg / blobdiff