forked from len0rd/rockbox
Approx 10% speedup in cook on files tested: Remove some inner loops in favour of memcpy/memset/vect_add calls; remove multiplication from index arithmetic in loops in favour of pointer arithmetic; make use of the MULT31, MULT31_SHIFT15 and CLIP_TO_15 implementations from codelib instead of having their own implementations in cook
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22055 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Hooper
parent
cece75eb42
commit
a8d1cfdec8
2 changed files with 84 additions and 99 deletions
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@ -328,13 +328,8 @@ static void categorize(COOKContext *q, int* quant_index_table,
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--exp_index2[index];
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}
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}
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for(i=0 ; i<q->total_subbands ; i++)
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category[i] = exp_index2[i];
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for(i=0 ; i<q->numvector_size-1 ; i++)
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category_index[i] = tmp_categorize_array[tmp_categorize_array2_idx++];
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memcpy(category, exp_index2, sizeof(int) * q->total_subbands );
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memcpy(category_index, tmp_categorize_array+tmp_categorize_array2_idx, sizeof(int) * (q->numvector_size-1) );
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}
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@ -370,27 +365,38 @@ static int unpack_SQVH(COOKContext *q, int category, int* subband_coef_index,
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vd = vd_tab[category];
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result = 0;
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for(i=0 ; i<vpr_tab[category] ; i++){
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for(i=0 ; i<vpr_tab[category] ; i++)
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{
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vlc = get_vlc2(&q->gb, q->sqvh[category].table, q->sqvh[category].bits, 3);
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if (q->bits_per_subpacket < get_bits_count(&q->gb)){
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if (q->bits_per_subpacket < get_bits_count(&q->gb))
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{
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vlc = 0;
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result = 1;
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memset(subband_coef_index, 0, sizeof(int)*vd);
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memset(subband_coef_sign, 0, sizeof(int)*vd);
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subband_coef_index+=vd;
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subband_coef_sign+=vd;
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}
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else
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{
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for(j=vd-1 ; j>=0 ; j--){
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tmp = (vlc * invradix_tab[category])/0x100000;
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subband_coef_index[vd*i+j] = vlc - tmp * (kmax_tab[category]+1);
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subband_coef_index[j] = vlc - tmp * (kmax_tab[category]+1);
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vlc = tmp;
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}
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for(j=0 ; j<vd ; j++){
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if (subband_coef_index[i*vd + j]) {
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for(j=0 ; j<vd ; j++)
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{
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if (*subband_coef_index++) {
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if(get_bits_count(&q->gb) < q->bits_per_subpacket) {
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subband_coef_sign[i*vd+j] = get_bits1(&q->gb);
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*subband_coef_sign++ = get_bits1(&q->gb);
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} else {
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result=1;
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subband_coef_sign[i*vd+j]=0;
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*subband_coef_sign++=0;
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}
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} else {
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subband_coef_sign[i*vd+j]=0;
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*subband_coef_sign++=0;
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}
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}
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}
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}
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@ -505,7 +511,7 @@ static void decouple_info(COOKContext *q, int* decouple_tab){
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static void joint_decode(COOKContext *q, REAL_T* mlt_buffer1,
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REAL_T* mlt_buffer2) {
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int i,j;
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int i;
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int decouple_tab[SUBBAND_SIZE];
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REAL_T *decode_buffer = q->decode_buffer_0;
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int idx;
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@ -520,11 +526,14 @@ static void joint_decode(COOKContext *q, REAL_T* mlt_buffer1,
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mono_decode(q, decode_buffer);
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/* The two channels are stored interleaved in decode_buffer. */
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for (i=0 ; i<q->js_subband_start ; i++) {
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for (j=0 ; j<SUBBAND_SIZE ; j++) {
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mlt_buffer1[i*20+j] = decode_buffer[i*40+j];
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mlt_buffer2[i*20+j] = decode_buffer[i*40+20+j];
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}
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REAL_T * mlt_buffer1_end = mlt_buffer1 + (q->js_subband_start*SUBBAND_SIZE);
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while(mlt_buffer1 < mlt_buffer1_end)
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{
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memcpy(mlt_buffer1,decode_buffer,sizeof(REAL_T)*SUBBAND_SIZE);
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memcpy(mlt_buffer2,decode_buffer+20,sizeof(REAL_T)*SUBBAND_SIZE);
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mlt_buffer1 += 20;
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mlt_buffer2 += 20;
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decode_buffer += 40;
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}
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/* When we reach js_subband_start (the higher frequencies)
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@ -533,11 +542,15 @@ static void joint_decode(COOKContext *q, REAL_T* mlt_buffer1,
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for (i=q->js_subband_start ; i<q->subbands ; i++) {
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int i1 = decouple_tab[cplband[i]];
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int i2 = idx - i1 - 1;
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for (j=0 ; j<SUBBAND_SIZE ; j++) {
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REAL_T x = decode_buffer[((q->js_subband_start + i)*20)+j];
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mlt_buffer1[20*i+j] = cplscale_math(x, q->js_vlc_bits, i1);
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mlt_buffer2[20*i+j] = cplscale_math(x, q->js_vlc_bits, i2);
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mlt_buffer1_end = mlt_buffer1 + SUBBAND_SIZE;
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while(mlt_buffer1 < mlt_buffer1_end)
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{
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*mlt_buffer1++ = cplscale_math(*decode_buffer, q->js_vlc_bits, i1);
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*mlt_buffer2++ = cplscale_math(*decode_buffer++, q->js_vlc_bits, i2);
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}
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mlt_buffer1 += (20-SUBBAND_SIZE);
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mlt_buffer2 += (20-SUBBAND_SIZE);
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decode_buffer += (20-SUBBAND_SIZE);
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}
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}
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@ -581,7 +594,7 @@ decode_bytes_and_gain(COOKContext *q, const uint8_t *inbuffer,
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* @param chan 0: left or single channel, 1: right channel
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*/
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static inline void
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static void
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mlt_compensate_output(COOKContext *q, REAL_T *decode_buffer,
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cook_gains *gains, REAL_T *previous_buffer,
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int16_t *out, int chan)
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@ -35,6 +35,11 @@
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* in C using two 32 bit integer multiplications.
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*/
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/* get definitions of MULT31, MULT31_SHIFT15, CLIP_TO_15, vect_add, from codelib */
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#include "asm_arm.h"
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#include "asm_mcf5249.h"
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#include "codeclib_misc.h"
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/* The following table is taken from libavutil/mathematics.c */
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const uint8_t ff_log2_tab[256] ={
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0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
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@ -67,6 +72,11 @@ static inline FIXP fixp_pow2(FIXP x, int i)
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return x << i; /* no check for overflow */
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}
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static inline FIXP fixp_pow2_neg(FIXP x, int i)
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{
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return (x >> i) + ((x >> (i-1)) & 1);
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}
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/**
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* Fixed point multiply by fraction.
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*
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@ -74,53 +84,10 @@ static inline FIXP fixp_pow2(FIXP x, int i)
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* @param b fix point fraction, 0 <= b < 1
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*/
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static inline FIXP fixp_mult_su(FIXP a, FIXPU b)
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{
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int32_t hb = (a >> 16) * b;
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uint32_t lb = (a & 0xffff) * b;
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return hb + (lb >> 16) + ((lb & 0x8000) >> 15);
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}
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#define fixp_mult_su(x,y) (MULT31_SHIFT15(x,y))
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/* Faster version of the above using 32x32=64 bit multiply */
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#ifdef CPU_ARM
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#define fixmul31(x, y) \
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({ int32_t __hi; \
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uint32_t __lo; \
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int32_t __result; \
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asm ("smull %0, %1, %3, %4\n\t" \
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"movs %2, %1, lsl #1" \
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: "=&r" (__lo), "=&r" (__hi), "=r" (__result) \
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: "%r" (x), "r" (y) \
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: "cc"); \
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__result; \
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})
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#elif defined(CPU_COLDFIRE)
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static inline int32_t fixmul31(int32_t x, int32_t y)
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{
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asm (
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"mac.l %[x], %[y], %%acc0 \n" /* multiply */
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"movclr.l %%acc0, %[x] \n" /* get higher half */
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: [x] "+d" (x)
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: [y] "d" (y)
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);
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return x;
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}
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#else
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static inline int32_t fixmul31(int32_t x, int32_t y)
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{
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int64_t temp;
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temp = x;
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temp *= y;
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temp >>= 31; //16+31-16 = 31 bits
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return (int32_t)temp;
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}
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#endif
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#define fixmul31(x,y) (MULT31(x,y))
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/* math functions taken from libavutil/common.h */
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@ -169,13 +136,13 @@ static void scalar_dequant_math(COOKContext *q, int index,
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int* subband_coef_sign, REAL_T *mlt_p)
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{
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/* Num. half bits to right shift */
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const int s = 33 - quant_index + av_log2(q->samples_per_channel);
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const int s = (33 - quant_index + av_log2(q->samples_per_channel)) >> 1;
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const FIXP *table = quant_tables[s & 1][index];
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FIXP f;
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int i;
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if(s >= 64)
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if(s >= 32)
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memset(mlt_p, 0, sizeof(REAL_T)*SUBBAND_SIZE);
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else
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{
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@ -186,7 +153,7 @@ static void scalar_dequant_math(COOKContext *q, int index,
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((subband_coef_index[i] != 0) && subband_coef_sign[i]))
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f = -f;
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mlt_p[i] =fixp_pow2(f, -(s/2));
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*mlt_p++ = fixp_pow2_neg(f, s);
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}
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}
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}
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@ -274,10 +241,9 @@ static inline void imlt_math(COOKContext *q, FIXP *in)
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static inline void overlap_math(COOKContext *q, int gain, FIXP buffer[])
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{
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int i;
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if(LIKELY(gain == 0)){
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for(i=0 ; i<q->samples_per_channel ; i++) {
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q->mono_mdct_output[i] += buffer[i];
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}
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if(LIKELY(gain == 0))
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{
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vect_add(q->mono_mdct_output, buffer, q->samples_per_channel);
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} else if (gain > 0){
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for(i=0 ; i<q->samples_per_channel ; i++) {
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@ -301,7 +267,7 @@ static inline void overlap_math(COOKContext *q, int gain, FIXP buffer[])
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* @param gain_index_next index for the next block multiplier
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*/
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static inline void
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interpolate_math(COOKContext *q, FIXP* buffer,
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interpolate_math(COOKContext *q, register FIXP* buffer,
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int gain_index, int gain_index_next)
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{
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int i;
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@ -315,14 +281,17 @@ interpolate_math(COOKContext *q, FIXP* buffer,
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int step = (gain_index_next - gain_index)
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<< (7 - av_log2(gain_size_factor));
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int x = 0;
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for(i = 0; i < gain_size_factor; i++) {
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buffer[i] = fixp_mult_su(buffer[i], pow128_tab[x]);
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buffer[i] = fixp_pow2(buffer[i], gain_index+1);
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register FIXP* bufferend = buffer+gain_size_factor;
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while(buffer < bufferend )
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{
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*buffer = fixp_pow2(
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fixp_mult_su(*buffer, pow128_tab[x]),
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gain_index+1);
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buffer++;
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x += step;
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gain_index += (x + 128) / 128 - 1;
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x = (x + 128) % 128;
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gain_index += ( (x + 128) >> 7 ) - 1;
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x = ( (x + 128) & 127 );
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}
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}
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}
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@ -349,12 +318,15 @@ static inline FIXP cplscale_math(FIXP x, int table, int i)
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* @param out pointer to the output buffer
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* @param chan 0: left or single channel, 1: right channel
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*/
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static inline void output_math(COOKContext *q, int16_t *out, int chan)
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static inline void output_math(COOKContext *q, register int16_t *out, int chan)
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{
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int j;
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for (j = 0; j < q->samples_per_channel; j++) {
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out[chan + q->nb_channels * j] =
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av_clip(fixp_pow2(q->mono_mdct_output[j], -11), -32768, 32767);
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register REAL_T * mono_output_ptr = q->mono_mdct_output;
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register REAL_T * mono_output_end = mono_output_ptr + q->samples_per_channel;
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out += chan;
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const int STEP = q->nb_channels;
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while( mono_output_ptr < mono_output_end )
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{
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*out = CLIP_TO_15(fixp_pow2_neg(*mono_output_ptr++, 11));
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out += STEP;
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}
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}
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