* ATI VCR1 codec
* Copyright (c) 2003 Michael Niedermayer
*
- * 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 vcr1.c
* ati vcr1 codec.
*/
-
+
#include "avcodec.h"
#include "mpegvideo.h"
int offset[4];
} VCR1Context;
-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 *bytestream= buf;
int i, x, y;
- *data_size = 0;
-
- /* special case for last picture */
- if (buf_size == 0) {
- return 0;
- }
-
if(p->data[0])
avctx->release_buffer(avctx, p);
p->reference= 0;
if(avctx->get_buffer(avctx, p) < 0){
- fprintf(stderr, "get_buffer() failed\n");
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
p->pict_type= I_TYPE;
a->delta[i]= *(bytestream++);
bytestream++;
}
-
+
for(y=0; y<avctx->height; y++){
int offset;
uint8_t *luma= &a->picture.data[0][ y*a->picture.linesize[0] ];
for(i=0; i<4; i++)
a->offset[i]= *(bytestream++);
- offset= a->offset[0];
+ offset= a->offset[0] - a->delta[ bytestream[2]&0xF ];
for(x=0; x<avctx->width; x+=4){
luma[0]=( offset += a->delta[ bytestream[2]&0xF ]);
luma[1]=( offset += a->delta[ bytestream[2]>>4 ]);
luma[2]=( offset += a->delta[ bytestream[0]&0xF ]);
luma[3]=( offset += a->delta[ bytestream[0]>>4 ]);
luma += 4;
-
- *(cb++) = bytestream[1];
- *(cr++) = bytestream[3];
-
+
+ *(cb++) = bytestream[3];
+ *(cr++) = bytestream[1];
+
bytestream+= 4;
}
}else{
- offset= a->offset[y&3];
+ offset= a->offset[y&3] - a->delta[ bytestream[2]&0xF ];
for(x=0; x<avctx->width; x+=8){
luma[0]=( offset += a->delta[ bytestream[2]&0xF ]);
*data_size = sizeof(AVPicture);
emms_c();
-
+
return buf_size;
}
p->key_frame= 1;
emms_c();
-
+
align_put_bits(&a->pb);
while(get_bit_count(&a->pb)&31)
put_bits(&a->pb, 8, 0);
-
+
size= get_bit_count(&a->pb)/32;
-
+
return size*4;
}
#endif
}
static int decode_init(AVCodecContext *avctx){
- VCR1Context * const a = avctx->priv_data;
- AVFrame *p= (AVFrame*)&a->picture;
- int i;
-
+
common_init(avctx);
-
+
avctx->pix_fmt= PIX_FMT_YUV410P;
return 0;
}
+#if 0
static int encode_init(AVCodecContext *avctx){
- VCR1Context * const a = avctx->priv_data;
- int i;
-
- common_init(avctx);
-
- return 0;
-}
-
-static int decode_end(AVCodecContext *avctx){
- VCR1Context * const a = avctx->priv_data;
- avcodec_default_free_buffers(avctx);
+ common_init(avctx);
return 0;
}
+#endif
AVCodec vcr1_decoder = {
"vcr1",
sizeof(VCR1Context),
decode_init,
NULL,
- decode_end,
+ NULL,
decode_frame,
CODEC_CAP_DR1,
};