23 #define BITSTREAM_READER_LE
31 #define MAX_BACKWARD_FILTER_ORDER 36
32 #define MAX_BACKWARD_FILTER_LEN 40
33 #define MAX_BACKWARD_FILTER_NONREC 35
35 #define RA288_BLOCK_SIZE 5
36 #define RA288_BLOCKS_PER_FRAME 32
73 static void convolve(
float *tgt,
const float *src,
int len,
int n)
88 memmove(ractx->
sp_hist + 70, ractx->
sp_hist + 75, 36*
sizeof(*block));
92 for (i=0; i < 10; i++)
93 sum -= gain_block[9-i] * ractx->
gain_lpc[i];
96 sum = av_clipf(sum, 0, 60);
100 sumsum = exp(sum * 0.1151292546497) * gain * (1.0/(1<<23));
102 for (i=0; i < 5; i++)
103 buffer[i] =
codetable[cb_coef][i] * sumsum;
110 memmove(gain_block, gain_block + 1, 9 *
sizeof(*gain_block));
112 gain_block[9] = 10 * log10(sum) - 32;
130 int order,
int n,
int non_rec,
float *out,
131 float *hist,
float *out2,
const float *window)
142 convolve(buffer1, work + order , n , order);
143 convolve(buffer2, work + order + n, non_rec, order);
145 for (i=0; i <= order; i++) {
146 out2[i] = out2[i] * 0.5625 + buffer1[i];
147 out [i] = out2[i] + buffer2[i];
158 float *hist,
float *rec,
const float *window,
159 float *lpc,
const float *
tab,
160 int order,
int n,
int non_rec,
int move_size)
169 memmove(hist, hist + n, move_size*
sizeof(*hist));
173 int *got_frame_ptr,
AVPacket *avpkt)
175 const uint8_t *buf = avpkt->
data;
176 int buf_size = avpkt->
size;
182 if (buf_size < avctx->block_align) {
184 "Error! Input buffer is too small [%d<%d]\n",
201 int cb_coef =
get_bits(&gb, 6 + (i&1));
203 decode(ractx, gain, cb_coef);