* Electronic Arts TGV 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
*/
*/
#include "avcodec.h"
-#define ALT_BITSTREAM_READER_LE
+#define BITSTREAM_READER_LE
#include "get_bits.h"
-#include "libavutil/lzo.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/mem.h"
#define EA_PREAMBLE_SIZE 8
#define kVGT_TAG MKTAG('k', 'V', 'G', 'T')
TgvContext *s = avctx->priv_data;
s->avctx = avctx;
avctx->time_base = (AVRational){1, 15};
- avctx->pix_fmt = PIX_FMT_PAL8;
+ avctx->pix_fmt = AV_PIX_FMT_PAL8;
return 0;
}
*/
static int unpack(const uint8_t *src, const uint8_t *src_end, unsigned char *dst, int width, int height) {
unsigned char *dst_end = dst + width*height;
- int size, size1, size2, av_uninit(offset), run;
+ int size, size1, size2, offset, run;
unsigned char *dst_start = dst;
if (src[0] & 0x01)
* @return 0 on success, -1 on critical buffer underflow
*/
static int tgv_decode_inter(TgvContext * s, const uint8_t *buf, const uint8_t *buf_end){
- unsigned char *frame0_end = s->last_frame.data[0] + s->avctx->width*s->last_frame.linesize[0];
int num_mvs;
int num_blocks_raw;
int num_blocks_packed;
vector_bits = AV_RL16(&buf[6]);
buf += 12;
- /* allocate codebook buffers as neccessary */
+ if (vector_bits > MIN_CACHE_BITS || !vector_bits) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Invalid value for motion vector bits: %d\n", vector_bits);
+ return AVERROR_INVALIDDATA;
+ }
+
+ /* allocate codebook buffers as necessary */
if (num_mvs > s->num_mvs) {
s->mv_codebook = av_realloc(s->mv_codebook, num_mvs*2*sizeof(int));
s->num_mvs = num_mvs;
int src_stride;
if (vector < num_mvs) {
- src = s->last_frame.data[0] +
- (y*4 + s->mv_codebook[vector][1])*s->last_frame.linesize[0] +
- x*4 + s->mv_codebook[vector][0];
- src_stride = s->last_frame.linesize[0];
- if (src+3*src_stride+3>=frame0_end)
+ int mx = x * 4 + s->mv_codebook[vector][0];
+ int my = y * 4 + s->mv_codebook[vector][1];
+
+ if ( mx < 0 || mx + 4 > s->avctx->width
+ || my < 0 || my + 4 > s->avctx->height)
continue;
+
+ src = s->last_frame.data[0] + mx + my * s->last_frame.linesize[0];
+ src_stride = s->last_frame.linesize[0];
}else{
int offset = vector - num_mvs;
if (offset<num_blocks_raw)
}
static int tgv_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
+ void *data, int *got_frame,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
}
}
- if (avcodec_check_dimensions(avctx, s->width, s->height))
+ if (av_image_check_size(s->width, s->height, 0, avctx))
return -1;
/* shuffle */
s->frame.buffer_hints = FF_BUFFER_HINTS_VALID;
s->frame.linesize[0] = s->width;
- /* allocate additional 12 bytes to accomodate av_memcpy_backptr() OUTBUF_PADDED optimisation */
- s->frame.data[0] = av_malloc(s->width*s->height + 12);
+ s->frame.data[0] = av_malloc(s->width * s->height);
if (!s->frame.data[0])
return AVERROR(ENOMEM);
s->frame.data[1] = av_malloc(AVPALETTE_SIZE);
if(chunk_type==kVGT_TAG) {
s->frame.key_frame = 1;
- s->frame.pict_type = FF_I_TYPE;
+ s->frame.pict_type = AV_PICTURE_TYPE_I;
if (unpack(buf, buf_end, s->frame.data[0], s->avctx->width, s->avctx->height)<0) {
av_log(avctx, AV_LOG_WARNING, "truncated intra frame\n");
return -1;
return buf_size;
}
s->frame.key_frame = 0;
- s->frame.pict_type = FF_P_TYPE;
+ s->frame.pict_type = AV_PICTURE_TYPE_P;
if (tgv_decode_inter(s, buf, buf_end)<0) {
av_log(avctx, AV_LOG_WARNING, "truncated inter frame\n");
return -1;
}
}
- *data_size = sizeof(AVFrame);
+ *got_frame = 1;
*(AVFrame*)data = s->frame;
return buf_size;
return 0;
}
-AVCodec eatgv_decoder = {
- "eatgv",
- AVMEDIA_TYPE_VIDEO,
- CODEC_ID_TGV,
- sizeof(TgvContext),
- tgv_decode_init,
- NULL,
- tgv_decode_end,
- tgv_decode_frame,
- .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TGV video"),
+AVCodec ff_eatgv_decoder = {
+ .name = "eatgv",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_TGV,
+ .priv_data_size = sizeof(TgvContext),
+ .init = tgv_decode_init,
+ .close = tgv_decode_end,
+ .decode = tgv_decode_frame,
+ .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TGV video"),
};
projects / ffmpeg / blobdiff