*
* 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
-
+
/**
* @file loco.c
* LOCO codec.
*/
-
+
#include "avcodec.h"
#include "common.h"
#include "bitstream.h"
#include "golomb.h"
-enum LOCO_MODE {LOCO_UNKN=0, LOCO_CYUY2=-1, LOCO_CRGB=-2, LOCO_CYV12=-3,
+enum LOCO_MODE {LOCO_UNKN=0, LOCO_CYUY2=-1, LOCO_CRGB=-2, LOCO_CRGBA=-3, LOCO_CYV12=-4,
LOCO_YUY2=1, LOCO_UYVY=2, LOCO_RGB=3, LOCO_RGBA=4, LOCO_YV12=5};
typedef struct LOCOContext{
{
int cnt = 0;
int val = r->count;
-
+
while(r->sum > val && cnt < 9) {
val <<= 1;
cnt++;
}
-
+
return cnt;
}
{
r->sum += val;
r->count++;
-
+
if(r->count == 16) {
r->sum >>= 1;
r->count >>= 1;
r->run2 = 0;
}
}
-
+
return v;
}
static inline int loco_predict(uint8_t* data, int stride, int step)
{
int a, b, c;
-
+
a = data[-stride];
b = data[-step];
c = data[-stride - step];
-
+
return mid_pred(a, a + b - c, b);
}
RICEContext rc;
int val;
int i, j;
-
+
init_get_bits(&rc.gb, buf, buf_size*8);
rc.save = 0;
rc.run = 0;
rc.run2 = 0;
- rc.lossy = l->lossy;
-
+ rc.lossy = l->lossy;
+
rc.sum = 8;
rc.count = 1;
-
+
/* restore top left pixel */
val = loco_get_rice(&rc);
data[0] = 128 + val;
}
data += stride;
}
-
+
return ((get_bits_count(&rc.gb) + 7) >> 3);
}
-static int decode_frame(AVCodecContext *avctx,
+static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
decoded = loco_decode_plane(l, p->data[0], avctx->width, avctx->height,
p->linesize[0], buf, buf_size, 1);
buf += decoded; buf_size -= decoded;
- decoded = loco_decode_plane(l, p->data[1], avctx->width / 2, avctx->height / 2,
- p->linesize[1], buf, buf_size, 1);
- buf += decoded; buf_size -= decoded;
decoded = loco_decode_plane(l, p->data[2], avctx->width / 2, avctx->height / 2,
p->linesize[2], buf, buf_size, 1);
+ buf += decoded; buf_size -= decoded;
+ decoded = loco_decode_plane(l, p->data[1], avctx->width / 2, avctx->height / 2,
+ p->linesize[1], buf, buf_size, 1);
break;
case LOCO_CRGB: case LOCO_RGB:
- decoded = loco_decode_plane(l, p->data[0], avctx->width, avctx->height,
- p->linesize[0], buf, buf_size, 3);
+ decoded = loco_decode_plane(l, p->data[0] + p->linesize[0]*(avctx->height-1), avctx->width, avctx->height,
+ -p->linesize[0], buf, buf_size, 3);
buf += decoded; buf_size -= decoded;
- decoded = loco_decode_plane(l, p->data[0] + 1, avctx->width, avctx->height,
- p->linesize[0], buf, buf_size, 3);
+ decoded = loco_decode_plane(l, p->data[0] + p->linesize[0]*(avctx->height-1) + 1, avctx->width, avctx->height,
+ -p->linesize[0], buf, buf_size, 3);
buf += decoded; buf_size -= decoded;
- decoded = loco_decode_plane(l, p->data[0] + 2, avctx->width, avctx->height,
- p->linesize[0], buf, buf_size, 3);
+ decoded = loco_decode_plane(l, p->data[0] + p->linesize[0]*(avctx->height-1) + 2, avctx->width, avctx->height,
+ -p->linesize[0], buf, buf_size, 3);
break;
case LOCO_RGBA:
decoded = loco_decode_plane(l, p->data[0], avctx->width, avctx->height,
*data_size = sizeof(AVFrame);
*(AVFrame*)data = l->pic;
-
+
return buf_size;
}
l->lossy = LE_32(avctx->extradata + 8);
av_log(avctx, AV_LOG_INFO, "This is LOCO codec version %i, please upload file for study\n", version);
}
-
+
l->mode = LE_32(avctx->extradata + 4);
switch(l->mode) {
case LOCO_CYUY2: case LOCO_YUY2: case LOCO_UYVY:
case LOCO_CYV12: case LOCO_YV12:
avctx->pix_fmt = PIX_FMT_YUV420P;
break;
- case LOCO_RGBA:
+ case LOCO_CRGBA: case LOCO_RGBA:
avctx->pix_fmt = PIX_FMT_RGBA32;
break;
default: