* Electronic Arts CMV Video Decoder
* Copyright (c) 2007-2008 Peter Ross
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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 2.1 of the License, or (at your option) any later version.
*
- * Libav 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
* http://wiki.multimedia.cx/index.php?title=Electronic_Arts_CMV
*/
+#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/imgutils.h"
#include "avcodec.h"
static av_cold int cmv_decode_init(AVCodecContext *avctx){
CmvContext *s = avctx->priv_data;
+ avcodec_get_frame_defaults(&s->frame);
+ avcodec_get_frame_defaults(&s->last_frame);
+ avcodec_get_frame_defaults(&s->last2_frame);
+
s->avctx = avctx;
avctx->pix_fmt = PIX_FMT_PAL8;
return 0;
}else{ /* inter using last frame as reference */
int xoffset = (buf[i] & 0xF) - 7;
int yoffset = ((buf[i] >> 4)) - 7;
- cmv_motcomp(s->frame.data[0], s->frame.linesize[0],
- s->last_frame.data[0], s->last_frame.linesize[0],
- x*4, y*4, xoffset, yoffset, s->avctx->width, s->avctx->height);
+ if (s->last_frame.data[0])
+ cmv_motcomp(s->frame.data[0], s->frame.linesize[0],
+ s->last_frame.data[0], s->last_frame.linesize[0],
+ x*4, y*4, xoffset, yoffset, s->avctx->width, s->avctx->height);
}
i++;
}
buf += 16;
for (i=pal_start; i<pal_start+pal_count && i<AVPALETTE_COUNT && buf_end - buf >= 3; i++) {
- s->palette[i] = AV_RB24(buf);
+ s->palette[i] = 0xFF << 24 | AV_RB24(buf);
buf += 3;
}
}
return AVERROR_INVALIDDATA;
if (AV_RL32(buf)==MVIh_TAG||AV_RB32(buf)==MVIh_TAG) {
+ unsigned size = AV_RL32(buf + 4);
cmv_process_header(s, buf+EA_PREAMBLE_SIZE, buf_end);
- return buf_size;
+ if (size > buf_end - buf - EA_PREAMBLE_SIZE)
+ return -1;
+ buf += size;
}
if (av_image_check_size(s->width, s->height, 0, s->avctx))
FFSWAP(AVFrame, s->last_frame, s->last2_frame);
FFSWAP(AVFrame, s->frame, s->last_frame);
- s->frame.reference = 1;
- s->frame.buffer_hints = FF_BUFFER_HINTS_VALID;
+ s->frame.reference = 3;
+ s->frame.buffer_hints = FF_BUFFER_HINTS_VALID |
+ FF_BUFFER_HINTS_READABLE |
+ FF_BUFFER_HINTS_PRESERVE;
if (avctx->get_buffer(avctx, &s->frame)<0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;