* Electronic Arts CMV Video Decoder
* Copyright (c) 2007-2008 Peter Ross
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file eacmv.c
+ * @file
* Electronic Arts CMV Video Decoder
- * by Peter Ross (suxen_drol at hotmail dot com)
+ * by Peter Ross (pross@xvid.org)
*
* Technical details here:
* 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"
typedef struct CmvContext {
unsigned char *dst = s->frame.data[0];
int i;
- for (i=0; i < s->avctx->height && buf+s->avctx->width<=buf_end; i++) {
+ for (i=0; i < s->avctx->height && buf_end - buf >= s->avctx->width; i++) {
memcpy(dst, buf, s->avctx->width);
dst += s->frame.linesize[0];
buf += s->avctx->width;
i = 0;
for(y=0; y<s->avctx->height/4; y++)
- for(x=0; x<s->avctx->width/4 && buf+i<buf_end; x++) {
+ for(x=0; x<s->avctx->width/4 && buf_end - buf > i; x++) {
if (buf[i]==0xFF) {
unsigned char *dst = s->frame.data[0] + (y*4)*s->frame.linesize[0] + x*4;
if (raw+16<buf_end && *raw==0xFF) { /* intra */
}else if(raw<buf_end) { /* inter using second-last frame as reference */
int xoffset = (*raw & 0xF) - 7;
int yoffset = ((*raw >> 4)) - 7;
- cmv_motcomp(s->frame.data[0], s->frame.linesize[0],
- s->last2_frame.data[0], s->last2_frame.linesize[0],
- x*4, y*4, xoffset, yoffset, s->avctx->width, s->avctx->height);
+ if (s->last2_frame.data[0])
+ cmv_motcomp(s->frame.data[0], s->frame.linesize[0],
+ s->last2_frame.data[0], s->last2_frame.linesize[0],
+ x*4, y*4, xoffset, yoffset, s->avctx->width, s->avctx->height);
raw++;
}
}else{ /* inter using last frame as reference */
{
int pal_start, pal_count, i;
- if(buf+16>=buf_end) {
+ if(buf_end - buf < 16) {
av_log(s->avctx, AV_LOG_WARNING, "truncated header\n");
return;
}
pal_count = AV_RL16(&buf[14]);
buf += 16;
- for (i=pal_start; i<pal_start+pal_count && i<AVPALETTE_COUNT && buf+2<buf_end; i++) {
+ for (i=pal_start; i<pal_start+pal_count && i<AVPALETTE_COUNT && buf_end - buf >= 3; i++) {
s->palette[i] = AV_RB24(buf);
buf += 3;
}
static int cmv_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- const uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
CmvContext *s = avctx->priv_data;
const uint8_t *buf_end = buf + buf_size;
+ if (buf_end - buf < EA_PREAMBLE_SIZE)
+ return AVERROR_INVALIDDATA;
+
if (AV_RL32(buf)==MVIh_TAG||AV_RB32(buf)==MVIh_TAG) {
cmv_process_header(s, buf+EA_PREAMBLE_SIZE, buf_end);
return buf_size;
}
- if (avcodec_check_dimensions(s->avctx, s->width, s->height))
+ if (av_image_check_size(s->width, s->height, 0, s->avctx))
return -1;
/* shuffle */
if ((buf[0]&1)) { // subtype
cmv_decode_inter(s, buf+2, buf_end);
s->frame.key_frame = 0;
- s->frame.pict_type = FF_P_TYPE;
+ s->frame.pict_type = AV_PICTURE_TYPE_P;
}else{
s->frame.key_frame = 1;
- s->frame.pict_type = FF_I_TYPE;
+ s->frame.pict_type = AV_PICTURE_TYPE_I;
cmv_decode_intra(s, buf+2, buf_end);
}
return 0;
}
-AVCodec eacmv_decoder = {
- "eacmv",
- CODEC_TYPE_VIDEO,
- CODEC_ID_CMV,
- sizeof(CmvContext),
- cmv_decode_init,
- NULL,
- cmv_decode_end,
- cmv_decode_frame,
- CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts CMV Video"),
+AVCodec ff_eacmv_decoder = {
+ .name = "eacmv",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_CMV,
+ .priv_data_size = sizeof(CmvContext),
+ .init = cmv_decode_init,
+ .close = cmv_decode_end,
+ .decode = cmv_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts CMV video"),
};