* RealAudio 2.0 (28.8K)
* Copyright (c) 2003 the ffmpeg project
*
- * 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
*/
#include "avcodec.h"
#include "ra288.h"
-
+
typedef struct {
- float history[8];
- float output[40];
- float pr1[36];
- float pr2[10];
- int phase, phasep;
-
- float st1a[111],st1b[37],st1[37];
- float st2a[38],st2b[11],st2[11];
- float sb[41];
- float lhist[10];
+ float history[8];
+ float output[40];
+ float pr1[36];
+ float pr2[10];
+ int phase, phasep;
+
+ float st1a[111],st1b[37],st1[37];
+ float st2a[38],st2b[11],st2[11];
+ float sb[41];
+ float lhist[10];
} Real288_internal;
static int ra288_decode_init(AVCodecContext * avctx)
{
- Real288_internal *glob=avctx->priv_data;
- memset(glob,0,sizeof(Real288_internal));
- return 0;
+ Real288_internal *glob=avctx->priv_data;
+ memset(glob,0,sizeof(Real288_internal));
+ return 0;
}
static void prodsum(float *tgt, float *src, int len, int n);
/* initial decode */
-static void unpack(unsigned short *tgt, unsigned char *src, int len)
+static void unpack(unsigned short *tgt, unsigned char *src, unsigned int len)
{
int x,y,z;
int n,temp;
for (sum=32,x=10;x--;sum-=glob->pr2[x]*glob->lhist[x]);
if (sum<0) sum=0; else if (sum>60) sum=60;
- sumsum=exp(sum*0.1151292546497)*f; /* pow(10.0,sum/20)*f */
+ sumsum=exp(sum*0.1151292546497)*f; /* pow(10.0,sum/20)*f */
for (sum=0,x=5;x--;) { buffer[x]=table[x]*sumsum; sum+=buffer[x]*buffer[x]; }
if ((sum/=5)<1) sum=1;
if (x==c) fp=in;
work[x]=*(table++)*(*(st1++)=*(fp++));
}
-
+
prodsum(buffer1,work+n,i,n);
prodsum(buffer2,work+a,j,n);
void *data, int *data_size,
uint8_t * buf, int buf_size)
{
- if(avctx->extradata_size>=6)
- {
-//((short*)(avctx->extradata))[0]; /* subpacket size */
-//((short*)(avctx->extradata))[1]; /* subpacket height */
-//((short*)(avctx->extradata))[2]; /* subpacket flavour */
-//((short*)(avctx->extradata))[3]; /* coded frame size */
-//((short*)(avctx->extradata))[4]; /* codec's data length */
-//((short*)(avctx->extradata))[5...] /* codec's data */
- int bret;
void *datao;
- int w=avctx->block_align; /* 228 */
- int h=((short*)(avctx->extradata))[1]; /* 12 */
- int cfs=((short*)(avctx->extradata))[3]; /* coded frame size 38 */
- int i,j;
- if(buf_size<w*h)
+
+ if (buf_size < avctx->block_align)
{
- av_log(avctx, AV_LOG_ERROR, "ffra288: Error! Input buffer is too small [%d<%d]\n",buf_size,w*h);
- return 0;
+ av_log(avctx, AV_LOG_ERROR, "ffra288: Error! Input buffer is too small [%d<%d]\n",buf_size,avctx->block_align);
+ return 0;
}
+
datao = data;
- bret = 0;
- for (j = 0; j < h/2; j++)
- for (i = 0; i < h; i++)
- {
- data=decode_block(avctx,&buf[j*cfs+cfs*i*h/2],(signed short *)data,cfs);
- bret += cfs;
- }
+ data = decode_block(avctx, buf, (signed short *)data, avctx->block_align);
+
*data_size = (char *)data - (char *)datao;
- return bret;
- }
- else
- {
- av_log(avctx, AV_LOG_ERROR, "ffra288: Error: need extra data!!!\n");
- return 0;
- }
+ return avctx->block_align;
}
AVCodec ra_288_decoder =