* Miro VideoXL codec
* Copyright (c) 2004 Konstantin Shishkov
*
- * 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 xl.c
* Miro VideoXL codec.
*/
-
+
#include "avcodec.h"
#include "mpegvideo.h"
AVFrame pic;
} VideoXLContext;
-const int xl_table[32] = {
+static const int xl_table[32] = {
0, 1, 2, 3, 4, 5, 6, 7,
8, 9, 12, 15, 20, 25, 34, 46,
64, 82, 94, 103, 108, 113, 116, 119,
120, 121, 122, 123, 124, 125, 126, 127};
-static int decode_frame(AVCodecContext *avctx,
+static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
int stride;
uint32_t val;
int y0, y1, y2, y3, c0, c1;
-
-
- /* special case for last picture */
- if (buf_size == 0) {
- return 0;
- }
if(p->data[0])
avctx->release_buffer(avctx, p);
Y = a->pic.data[0];
U = a->pic.data[1];
V = a->pic.data[2];
-
+
stride = avctx->width - 4;
for (i = 0; i < avctx->height; i++) {
/* lines are stored in reversed order */
buf += stride;
-
+
for (j = 0; j < avctx->width; j += 4) {
/* value is stored in LE dword with word swapped */
val = LE_32(buf);
buf -= 4;
val = ((val >> 16) & 0xFFFF) | ((val & 0xFFFF) << 16);
-
+
if(!j)
y0 = (val & 0x1F) << 2;
else
c1 = (val & 0x1F) << 2;
else
c1 += xl_table[val & 0x1F];
-
+
Y[j + 0] = y0 << 1;
Y[j + 1] = y1 << 1;
Y[j + 2] = y2 << 1;
Y[j + 3] = y3 << 1;
-
+
U[j >> 2] = c0 << 1;
V[j >> 2] = c1 << 1;
}
-
+
buf += avctx->width + 4;
Y += a->pic.linesize[0];
U += a->pic.linesize[1];
*data_size = sizeof(AVFrame);
*(AVFrame*)data = a->pic;
-
+
return buf_size;
}