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optimisations: faster handling of the zero for compute_band_energies() and

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normalise_bands(). Also, another bunch of restrict qualifiers -- mainly
to tell the compiler there's no aliasing between the array bounds and the
data.
This commit is contained in:
Jean-Marc Valin 2008-03-26 14:36:07 +11:00
parent 25aeed74f1
commit a56c34f381
2 changed files with 23 additions and 22 deletions
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12
libcelt/bands.h
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@ -56,16 +56,16 @@ void compute_band_energies(const CELTMode *m, const celt_sig_t *X, celt_ener_t *
* @param X Spectrum (returned normalised)
* @param bands Square root of the energy for each band
*/
void normalise_bands(const CELTMode *m, const celt_sig_t *freq, celt_norm_t *X, const celt_ener_t *bands);
void normalise_bands(const CELTMode *m, const celt_sig_t * restrict freq, celt_norm_t * restrict X, const celt_ener_t *bands);
void renormalise_bands(const CELTMode *m, celt_norm_t *X);
void renormalise_bands(const CELTMode *m, celt_norm_t * restrict X);
/** Denormalise each band of X to restore full amplitude
* @param m Mode data
* @param X Spectrum (returned de-normalised)
* @param bands Square root of the energy for each band
*/
void denormalise_bands(const CELTMode *m, const celt_norm_t *X, celt_sig_t *freq, const celt_ener_t *bands);
void denormalise_bands(const CELTMode *m, const celt_norm_t * restrict X, celt_sig_t * restrict freq, const celt_ener_t *bands);
/** Compute the pitch predictor gain for each pitch band
* @param m Mode data
@ -76,7 +76,7 @@ void denormalise_bands(const CELTMode *m, const celt_norm_t *X, celt_sig_t *freq
*/
void compute_pitch_gain(const CELTMode *m, const celt_norm_t *X, const celt_norm_t *P, celt_pgain_t *gains);
void pitch_quant_bands(const CELTMode *m, celt_norm_t *P, const celt_pgain_t *gains);
void pitch_quant_bands(const CELTMode *m, celt_norm_t * restrict P, const celt_pgain_t * restrict gains);
/** Quantisation/encoding of the residual spectrum
* @param m Mode data
@ -86,7 +86,7 @@ void pitch_quant_bands(const CELTMode *m, celt_norm_t *P, const celt_pgain_t *ga
* @param total_bits Total number of bits that can be used for the frame (including the ones already spent)
* @param enc Entropy encoder
*/
void quant_bands(const CELTMode *m, celt_norm_t *X, celt_norm_t *P, celt_mask_t *W, int total_bits, ec_enc *enc);
void quant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, celt_mask_t *W, int total_bits, ec_enc *enc);
/** Decoding of the residual spectrum
* @param m Mode data
@ -95,7 +95,7 @@ void quant_bands(const CELTMode *m, celt_norm_t *X, celt_norm_t *P, celt_mask_t
* @param total_bits Total number of bits that can be used for the frame (including the ones already spent)
* @param dec Entropy decoder
*/
void unquant_bands(const CELTMode *m, celt_norm_t *X, celt_norm_t *P, int total_bits, ec_dec *dec);
void unquant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, int total_bits, ec_dec *dec);
void stereo_mix(const CELTMode *m, celt_norm_t *X, const celt_ener_t *bank, int dir);