24 #define BITSTREAM_READER_LE
32 #define MAX_BACKWARD_FILTER_ORDER 36
33 #define MAX_BACKWARD_FILTER_LEN 40
34 #define MAX_BACKWARD_FILTER_NONREC 35
36 #define RA288_BLOCK_SIZE 5
37 #define RA288_BLOCKS_PER_FRAME 32
74 static void convolve(
float *tgt,
const float *src,
int len,
int n)
89 memmove(ractx->
sp_hist + 70, ractx->
sp_hist + 75, 36*
sizeof(*block));
93 for (i=0; i < 10; i++)
94 sum -= gain_block[9-i] * ractx->
gain_lpc[i];
97 sum = av_clipf(sum, 0, 60);
101 sumsum = exp(sum * 0.1151292546497) * gain * (1.0/(1<<23));
103 for (i=0; i < 5; i++)
104 buffer[i] =
codetable[cb_coef][i] * sumsum;
111 memmove(gain_block, gain_block + 1, 9 *
sizeof(*gain_block));
113 gain_block[9] = 10 * log10(sum) - 32;
131 int order,
int n,
int non_rec,
float *out,
132 float *hist,
float *out2,
const float *window)
143 convolve(buffer1, work + order , n , order);
144 convolve(buffer2, work + order + n, non_rec, order);
146 for (i=0; i <= order; i++) {
147 out2[i] = out2[i] * 0.5625 + buffer1[i];
148 out [i] = out2[i] + buffer2[i];
159 float *hist,
float *rec,
const float *window,
160 float *lpc,
const float *
tab,
161 int order,
int n,
int non_rec,
int move_size)
170 memmove(hist, hist + n, move_size*
sizeof(*hist));
174 int *got_frame_ptr,
AVPacket *avpkt)
176 const uint8_t *buf = avpkt->
data;
177 int buf_size = avpkt->
size;
183 if (buf_size < avctx->block_align) {
185 "Error! Input buffer is too small [%d<%d]\n",
202 int cb_coef =
get_bits(&gb, 6 + (i&1));
204 decode(ractx, gain, cb_coef);