float gain_block[10]; ///< Gain data of four blocks (spec: GSTATE)
} RA288Context;
+static av_cold int ra288_decode_init(AVCodecContext *avctx)
+{
+ avctx->sample_fmt = SAMPLE_FMT_S16;
+ return 0;
+}
+
static inline float scalar_product_float(const float * v1, const float * v2,
int size)
{
int i, j;
double sumsum;
float sum, buffer[5];
+ float *block = ractx->sp_block + 36; // Current block
- memmove(ractx->sp_block + 5, ractx->sp_block, 36*sizeof(*ractx->sp_block));
+ memmove(ractx->sp_block, ractx->sp_block + 5, 36*sizeof(*ractx->sp_block));
- for (i=4; i >= 0; i--)
- ractx->sp_block[i] = -scalar_product_float(ractx->sp_block + i + 1,
- ractx->sp_lpc, 36);
+ for (i=0; i < 5; i++) {
+ block[i] = 0.;
+ for (j=0; j < 36; j++)
+ block[i] -= block[i-1-j]*ractx->sp_lpc[j];
+ }
/* block 46 of G.728 spec */
- sum = 32. - scalar_product_float(ractx->gain_lpc, ractx->gain_block, 10);
+ sum = 32.;
+ for (i=0; i < 10; i++)
+ sum -= ractx->gain_block[9-i] * ractx->gain_lpc[i];
/* block 47 of G.728 spec */
sum = av_clipf(sum, 0, 60);
sum = FFMAX(sum, 1);
/* shift and store */
- memmove(ractx->gain_block, ractx->gain_block - 1,
- 10 * sizeof(*ractx->gain_block));
+ memmove(ractx->gain_block, ractx->gain_block + 1,
+ 9 * sizeof(*ractx->gain_block));
- *ractx->gain_block = 10 * log10(sum) - 32;
+ ractx->gain_block[9] = 10 * log10(sum) - 32;
for (i=1; i < 5; i++)
for (j=i-1; j >= 0; j--)
/* output */
for (i=0; i < 5; i++)
- ractx->sp_block[4-i] =
- av_clipf(ractx->sp_block[4-i] + buffer[i], -4095, 4095);
+ block[i] = av_clipf(block[i] + buffer[i], -4095, 4095);
}
/**
return 0;
}
-static void prodsum(float *tgt, const float *src, int len, int n)
+static void convolve(float *tgt, const float *src, int len, int n)
{
for (; n >= 0; n--)
tgt[n] = scalar_product_float(src, src - n, len);
/**
* Hybrid window filtering. See blocks 36 and 49 of the G.728 specification.
*
- * @note This function is slightly different from that described in the spec.
- * It expects in[0] to be the newest sample and in[n-1] to be the oldest
- * one stored. The spec has in the more ordinary way (in[0] the oldest
- * and in[n-1] the newest).
- *
* @param order the order of the filter
* @param n the length of the input
* @param non_rec the number of non-recursive samples
float *out, float *hist, float *out2,
const float *window)
{
- unsigned int i;
+ int i;
float buffer1[order + 1];
float buffer2[order + 1];
float work[order + n + non_rec];
/* update history */
- memmove(hist, hist + n, (order + non_rec)*sizeof(*hist));
-
- for (i=0; i < n; i++)
- hist[order + non_rec + i] = in[n-i-1];
+ memmove(hist , hist + n, (order + non_rec)*sizeof(*hist));
+ memcpy (hist + order + non_rec, in , n *sizeof(*hist));
colmult(work, window, hist, order + n + non_rec);
- prodsum(buffer1, work + order , n , order);
- prodsum(buffer2, work + order + n, non_rec, order);
+ convolve(buffer1, work + order , n , order);
+ convolve(buffer2, work + order + n, non_rec, order);
for (i=0; i <= order; i++) {
out2[i] = out2[i] * 0.5625 + buffer1[i];
float temp1[37]; // RTMP in the spec
float temp2[11]; // GPTPMP in the spec
- do_hybrid_window(36, 40, 35, ractx->sp_block, temp1, ractx->sp_hist,
+ do_hybrid_window(36, 40, 35, ractx->sp_block+1, temp1, ractx->sp_hist,
ractx->sp_rec, syn_window);
if (!eval_lpc_coeffs(temp1, ractx->sp_lpc, 36))
colmult(ractx->sp_lpc, ractx->sp_lpc, syn_bw_tab, 36);
- do_hybrid_window(10, 8, 20, ractx->gain_block, temp2, ractx->gain_hist,
+ do_hybrid_window(10, 8, 20, ractx->gain_block+2, temp2, ractx->gain_hist,
ractx->gain_rec, gain_window);
if (!eval_lpc_coeffs(temp2, ractx->gain_lpc, 10))
return 0;
}
+ if (*data_size < 32*5*2)
+ return -1;
+
init_get_bits(&gb, buf, avctx->block_align * 8);
for (i=0; i < 32; i++) {
decode(ractx, gain, cb_coef);
for (j=0; j < 5; j++)
- *(out++) = 8 * ractx->sp_block[4 - j];
+ *(out++) = 8 * ractx->sp_block[36 + j];
if ((i & 7) == 3)
backward_filter(ractx);
CODEC_TYPE_AUDIO,
CODEC_ID_RA_288,
sizeof(RA288Context),
- NULL,
+ ra288_decode_init,
NULL,
NULL,
ra288_decode_frame,