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Rename two context vars: s/sb/sp_block/, s/lhist/gain_block/ 

Originally committed as revision 14452 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak 2008-07-28 04:53:05 +00:00
parent 36826ee0df
commit f285e6dd31
1 changed files with 13 additions and 11 deletions
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24
libavcodec/ra288.c
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@ -39,8 +39,8 @@ typedef struct {
/** Recursive part of the gain autocorrelation (spec: REXPLG) */
float gain_rec[11];
float sb[41];
float lhist[10];
float sp_block[41]; ///< Speech data of four blocks (spec: STTMP)
float gain_block[10]; ///< Gain data of four blocks (spec: GSTATE)
} RA288Context;
static inline float scalar_product_float(const float * v1, const float * v2,
@ -66,14 +66,14 @@ static void decode(RA288Context *ractx, float gain, int cb_coef)
double sumsum;
float sum, buffer[5];
memmove(ractx->sb + 5, ractx->sb, 36 * sizeof(*ractx->sb));
memmove(ractx->sp_block + 5, ractx->sp_block, 36*sizeof(*ractx->sp_block));
for (x=4; x >= 0; x--)
ractx->sb[x] = -scalar_product_float(ractx->sb + x + 1,
ractx->sp_block[x] = -scalar_product_float(ractx->sp_block + x + 1,
ractx->sp_lpc, 36);
/* block 46 of G.728 spec */
sum = 32. - scalar_product_float(ractx->gain_lpc, ractx->lhist, 10);
sum = 32. - scalar_product_float(ractx->gain_lpc, ractx->gain_block, 10);
/* block 47 of G.728 spec */
sum = av_clipf(sum, 0, 60);
@ -89,9 +89,10 @@ static void decode(RA288Context *ractx, float gain, int cb_coef)
sum = FFMAX(sum, 1);
/* shift and store */
memmove(ractx->lhist, ractx->lhist - 1, 10 * sizeof(*ractx->lhist));
memmove(ractx->gain_block, ractx->gain_block - 1,
10 * sizeof(*ractx->gain_block));
*ractx->lhist = 10 * log10(sum) - 32;
*ractx->gain_block = 10 * log10(sum) - 32;
for (x=1; x < 5; x++)
for (y=x-1; y >= 0; y--)
@ -99,7 +100,8 @@ static void decode(RA288Context *ractx, float gain, int cb_coef)
/* output */
for (x=0; x < 5; x++)
ractx->sb[4-x] = av_clipf(ractx->sb[4-x] + buffer[x], -4095, 4095);
ractx->sp_block[4-x] =
av_clipf(ractx->sp_block[4-x] + buffer[x], -4095, 4095);
}
/**
@ -203,13 +205,13 @@ static void backward_filter(RA288Context *ractx)
float temp1[37]; // RTMP in the spec
float temp2[11]; // GPTPMP in the spec
do_hybrid_window(36, 40, 35, ractx->sb, temp1, ractx->sp_hist,
do_hybrid_window(36, 40, 35, ractx->sp_block, 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->lhist, temp2, ractx->gain_hist,
do_hybrid_window(10, 8, 20, ractx->gain_block, temp2, ractx->gain_hist,
ractx->gain_rec, gain_window);
if (!eval_lpc_coeffs(temp2, ractx->gain_lpc, 10))
@ -241,7 +243,7 @@ static int ra288_decode_frame(AVCodecContext * avctx, void *data,
decode(ractx, gain, cb_coef);
for (y=0; y < 5; y++)
*(out++) = 8 * ractx->sb[4 - y];
*(out++) = 8 * ractx->sp_block[4 - y];
if (ractx->phase == 7)
backward_filter(ractx);