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moved the de-emphasis code to a separate function (shared between encoder and

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decoder), declared a few things static
This commit is contained in:
Jean-Marc Valin 2009-10-03 13:57:31 -04:00
parent de67858765
commit e12017ee2c
1 changed files with 25 additions and 26 deletions
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51
libcelt/celt.c
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@ -103,7 +103,7 @@ struct CELTEncoder {
#endif
};
int check_encoder(const CELTEncoder *st)
static int check_encoder(const CELTEncoder *st)
{
if (st==NULL)
{
@ -406,7 +406,7 @@ static void compute_inv_mdcts(const CELTMode *mode, int shortBlocks, celt_sig_t
#define FLAG_FOLD (1U<<10)
#define FLAG_MASK (FLAG_INTRA|FLAG_PITCH|FLAG_SHORT|FLAG_FOLD)
int flaglist[8] = {
static const int flaglist[8] = {
0 /*00 */ | FLAG_FOLD,
1 /*01 */ | FLAG_PITCH|FLAG_FOLD,
8 /*1000*/ | FLAG_NONE,
@ -417,7 +417,7 @@ int flaglist[8] = {
7 /*111 */ | FLAG_INTRA|FLAG_SHORT|FLAG_FOLD
};
void encode_flags(ec_enc *enc, int intra_ener, int has_pitch, int shortBlocks, int has_fold)
static void encode_flags(ec_enc *enc, int intra_ener, int has_pitch, int shortBlocks, int has_fold)
{
int i;
int flags=FLAG_NONE;
@ -440,7 +440,7 @@ void encode_flags(ec_enc *enc, int intra_ener, int has_pitch, int shortBlocks, i
ec_enc_uint(enc, flag_bits, 8);
}
void decode_flags(ec_dec *dec, int *intra_ener, int *has_pitch, int *shortBlocks, int *has_fold)
static void decode_flags(ec_dec *dec, int *intra_ener, int *has_pitch, int *shortBlocks, int *has_fold)
{
int i;
int flag_bits;
@ -461,6 +461,23 @@ void decode_flags(ec_dec *dec, int *intra_ener, int *has_pitch, int *shortBlocks
/*printf ("dec %d: %d %d %d %d\n", flag_bits, *intra_ener, *has_pitch, *shortBlocks, *has_fold);*/
}
static void deemphasis(celt_sig_t *in, celt_word16_t *pcm, int N, int C, celt_word16_t coef, celt_sig_t *mem)
{
int c;
for (c=0;c<C;c++)
{
int j;
for (j=0;j<N;j++)
{
celt_sig_t tmp = MAC16_32_Q15(in[C*(MAX_PERIOD-N)+C*j+c],
coef,mem[c]);
mem[c] = tmp;
pcm[C*j+c] = SCALEOUT(SIG2WORD16(tmp));
}
}
}
#ifdef FIXED_POINT
int celt_encode(CELTEncoder * restrict st, const celt_int16_t * pcm, celt_int16_t * optional_synthesis, unsigned char *compressed, int nbCompressedBytes)
{
@ -774,20 +791,12 @@ int celt_encode_float(CELTEncoder * restrict st, const celt_sig_t * pcm, celt_si
apply_pitch(st->mode, freq, pitch_freq, gain_id, 0);
compute_inv_mdcts(st->mode, shortBlocks, freq, transient_time, transient_shift, st->out_mem);
/* De-emphasis and put everything back at the right place
in the synthesis history */
if (optional_synthesis != NULL) {
for (c=0;c<C;c++)
{
int j;
for (j=0;j<N;j++)
{
celt_sig_t tmp = MAC16_32_Q15(st->out_mem[C*(MAX_PERIOD-N)+C*j+c],
preemph,st->preemph_memD[c]);
st->preemph_memD[c] = tmp;
optional_synthesis[C*j+c] = SCALEOUT(SIG2WORD16(tmp));
}
}
deemphasis(st->out_mem, optional_synthesis, N, C, preemph, st->preemph_memD);
}
}
@ -1307,17 +1316,7 @@ int celt_decode_float(CELTDecoder * restrict st, const unsigned char *data, int
/* Compute inverse MDCTs */
compute_inv_mdcts(st->mode, shortBlocks, freq, transient_time, transient_shift, st->out_mem);
for (c=0;c<C;c++)
{
int j;
for (j=0;j<N;j++)
{
celt_sig_t tmp = MAC16_32_Q15(st->out_mem[C*(MAX_PERIOD-N)+C*j+c],
preemph,st->preemph_memD[c]);
st->preemph_memD[c] = tmp;
pcm[C*j+c] = SCALEOUT(SIG2WORD16(tmp));
}
}
deemphasis(st->out_mem, pcm, N, C, preemph, st->preemph_memD);
RESTORE_STACK;
return 0;