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sse and 3dnow implementations of float->int conversion and mdct windowing. 

15% faster vorbis.

Originally committed as revision 5975 to svn://svn.ffmpeg.org/ffmpeg/trunk
tags/v0.5
Loren Merritt 19 years ago
parent
60ae06e77e
commit
eb4825b5d4
5 changed files with 317 additions and 48 deletions
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  1. +37
    -0
      libavcodec/dsputil.c
  2. +14
    -0
      libavcodec/dsputil.h
  3. +210
    -3
      libavcodec/i386/dsputil_mmx.c
  4. +54
    -45
      libavcodec/vorbis.c
  5. +2
    -0
      libavcodec/vorbis.h

+ 37
- 0
libavcodec/dsputil.c View File

@@ -3753,6 +3753,39 @@ WARPER8_16_SQ(quant_psnr8x8_c, quant_psnr16_c)
WARPER8_16_SQ(rd8x8_c, rd16_c)
WARPER8_16_SQ(bit8x8_c, bit16_c)

static void vector_fmul_c(float *dst, const float *src, int len){
int i;
for(i=0; i<len; i++)
dst[i] *= src[i];
}

static void vector_fmul_reverse_c(float *dst, const float *src0, const float *src1, int len){
int i;
src1 += len-1;
for(i=0; i<len; i++)
dst[i] = src0[i] * src1[-i];
}

void ff_vector_fmul_add_add_c(float *dst, const float *src0, const float *src1, const float *src2, int src3, int len, int step){
int i;
for(i=0; i<len; i++)
dst[i*step] = src0[i] * src1[i] + src2[i] + src3;
}

void ff_float_to_int16_c(int16_t *dst, const float *src, int len){
int i;
for(i=0; i<len; i++) {
int_fast32_t tmp = ((int32_t*)src)[i];
if(tmp & 0xf0000){
tmp = (0x43c0ffff - tmp)>>31;
// is this faster on some gcc/cpu combinations?
// if(tmp > 0x43c0ffff) tmp = 0xFFFF;
// else tmp = 0;
}
dst[i] = tmp - 0x8000;
}
}

/* XXX: those functions should be suppressed ASAP when all IDCTs are
converted */
static void ff_jref_idct_put(uint8_t *dest, int line_size, DCTELEM *block)
@@ -4096,6 +4129,10 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
#ifdef CONFIG_VORBIS_DECODER
c->vorbis_inverse_coupling = vorbis_inverse_coupling;
#endif
c->vector_fmul = vector_fmul_c;
c->vector_fmul_reverse = vector_fmul_reverse_c;
c->vector_fmul_add_add = ff_vector_fmul_add_add_c;
c->float_to_int16 = ff_float_to_int16_c;

c->shrink[0]= ff_img_copy_plane;
c->shrink[1]= ff_shrink22;


+ 14
- 0
libavcodec/dsputil.h View File

@@ -58,6 +58,10 @@ void ff_h264_idct_dc_add_c(uint8_t *dst, DCTELEM *block, int stride);
void ff_h264_lowres_idct_add_c(uint8_t *dst, int stride, DCTELEM *block);
void ff_h264_lowres_idct_put_c(uint8_t *dst, int stride, DCTELEM *block);

void ff_vector_fmul_add_add_c(float *dst, const float *src0, const float *src1,
const float *src2, int src3, int blocksize, int step);
void ff_float_to_int16_c(int16_t *dst, const float *src, int len);

/* encoding scans */
extern const uint8_t ff_alternate_horizontal_scan[64];
extern const uint8_t ff_alternate_vertical_scan[64];
@@ -307,7 +311,17 @@ typedef struct DSPContext {

void (*h261_loop_filter)(uint8_t *src, int stride);

/* assume len is a multiple of 4, and arrays are 16-byte aligned */
void (*vorbis_inverse_coupling)(float *mag, float *ang, int blocksize);
void (*vector_fmul)(float *dst, const float *src, int len);
/* assume len is a multiple of 8, and arrays are 16-byte aligned */
void (*vector_fmul_reverse)(float *dst, const float *src0, const float *src1, int len);
/* assume len is a multiple of 8, and src arrays are 16-byte aligned */
void (*vector_fmul_add_add)(float *dst, const float *src0, const float *src1, const float *src2, int src3, int len, int step);

/* C version: convert floats from the range [384.0,386.0] to ints in [-32768,32767]
* asm versions: convert floats from [-32768.0,32767.0] without rescaling */
void (*float_to_int16)(int16_t *dst, const float *src, int len);

/* (I)DCT */
void (*fdct)(DCTELEM *block/* align 16*/);


+ 210
- 3
libavcodec/i386/dsputil_mmx.c View File

@@ -2772,6 +2772,198 @@ static void vorbis_inverse_coupling_sse(float *mag, float *ang, int blocksize)
}
}

static void vector_fmul_3dnow(float *dst, const float *src, int len){
long i;
len >>= 1;
for(i=0; i<len; i++) {
asm volatile(
"movq %0, %%mm0 \n\t"
"pfmul %1, %%mm0 \n\t"
"movq %%mm0, %0 \n\t"
:"+m"(dst[i*2])
:"m"(src[i*2])
:"memory"
);
}
asm volatile("femms");
}
static void vector_fmul_sse(float *dst, const float *src, int len){
long i;
len >>= 2;
for(i=0; i<len; i++) {
asm volatile(
"movaps %0, %%xmm0 \n\t"
"mulps %1, %%xmm0 \n\t"
"movaps %%xmm0, %0 \n\t"
:"+m"(dst[i*4])
:"m"(src[i*4])
:"memory"
);
}
}

static void vector_fmul_reverse_3dnow2(float *dst, const float *src0, const float *src1, int len){
long i = len*4-16;
asm volatile(
"1: \n\t"
"pswapd 8(%1), %%mm0 \n\t"
"pswapd (%1), %%mm1 \n\t"
"pfmul (%3,%0), %%mm0 \n\t"
"pfmul 8(%3,%0), %%mm1 \n\t"
"movq %%mm0, (%2,%0) \n\t"
"movq %%mm1, 8(%2,%0) \n\t"
"add $16, %1 \n\t"
"sub $16, %0 \n\t"
"jge 1b \n\t"
:"+r"(i), "+r"(src1)
:"r"(dst), "r"(src0)
);
asm volatile("femms");
}
static void vector_fmul_reverse_sse2(float *dst, const float *src0, const float *src1, int len){
long i = len*4-32;
asm volatile(
"1: \n\t"
"pshufd $0x1b, 16(%1), %%xmm0 \n\t"
"pshufd $0x1b, (%1), %%xmm1 \n\t"
"mulps (%3,%0), %%xmm0 \n\t"
"mulps 16(%3,%0), %%xmm1 \n\t"
"movaps %%xmm0, (%2,%0) \n\t"
"movaps %%xmm1, 16(%2,%0) \n\t"
"add $32, %1 \n\t"
"sub $32, %0 \n\t"
"jge 1b \n\t"
:"+r"(i), "+r"(src1)
:"r"(dst), "r"(src0)
);
}

static void vector_fmul_add_add_3dnow(float *dst, const float *src0, const float *src1,
const float *src2, int src3, int len, int step){
long i;
if(step == 2 && src3 == 0){
i = (len-4)*4;
dst += (len-4)*2;
asm volatile(
"1: \n\t"
"movq (%2,%0), %%mm0 \n\t"
"movq 8(%2,%0), %%mm1 \n\t"
"pfmul (%3,%0), %%mm0 \n\t"
"pfmul 8(%3,%0), %%mm1 \n\t"
"pfadd (%4,%0), %%mm0 \n\t"
"pfadd 8(%4,%0), %%mm1 \n\t"
"movd %%mm0, (%1) \n\t"
"movd %%mm1, 16(%1) \n\t"
"psrlq $32, %%mm0 \n\t"
"psrlq $32, %%mm1 \n\t"
"movd %%mm0, 8(%1) \n\t"
"movd %%mm1, 24(%1) \n\t"
"sub $32, %1 \n\t"
"sub $16, %0 \n\t"
"jge 1b \n\t"
:"+r"(i), "+r"(dst)
:"r"(src0), "r"(src1), "r"(src2)
:"memory"
);
}
else if(step == 1 && src3 == 0){
for(i=0; i<len; i+=2){
asm volatile(
"movq %1, %%mm0 \n\t"
"pfmul %2, %%mm0 \n\t"
"pfadd %3, %%mm0 \n\t"
"movq %%mm0, %0 \n\t"
:"=m"(dst[i])
:"m"(src0[i]), "m"(src1[i]), "m"(src2[i])
);
}
}
else
ff_vector_fmul_add_add_c(dst, src0, src1, src2, src3, len, step);
asm volatile("femms");
}
static void vector_fmul_add_add_sse2(float *dst, const float *src0, const float *src1,
const float *src2, float src3, int len, int step){
long i;
if(step == 2 && src3 == 0){
i = (len-8)*4;
dst += (len-8)*2;
asm volatile(
"1: \n\t"
"movaps (%2,%0), %%xmm0 \n\t"
"movaps 16(%2,%0), %%xmm1 \n\t"
"mulps (%3,%0), %%xmm0 \n\t"
"mulps 16(%3,%0), %%xmm1 \n\t"
"addps (%4,%0), %%xmm0 \n\t"
"addps 16(%4,%0), %%xmm1 \n\t"
"movd %%xmm0, (%1) \n\t"
"movd %%xmm1, 32(%1) \n\t"
"psrldq $4, %%xmm0 \n\t"
"psrldq $4, %%xmm1 \n\t"
"movd %%xmm0, 8(%1) \n\t"
"movd %%xmm1, 40(%1) \n\t"
"psrldq $4, %%xmm0 \n\t"
"psrldq $4, %%xmm1 \n\t"
"movd %%xmm0, 16(%1) \n\t"
"movd %%xmm1, 48(%1) \n\t"
"psrldq $4, %%xmm0 \n\t"
"psrldq $4, %%xmm1 \n\t"
"movd %%xmm0, 24(%1) \n\t"
"movd %%xmm1, 56(%1) \n\t"
"sub $64, %1 \n\t"
"sub $32, %0 \n\t"
"jge 1b \n\t"
:"+r"(i), "+r"(dst)
:"r"(src0), "r"(src1), "r"(src2)
:"memory"
);
}
else if(step == 1 && src3 == 0){
for(i=0; i<len; i+=4){
asm volatile(
"movaps %1, %%xmm0 \n\t"
"mulps %2, %%xmm0 \n\t"
"addps %3, %%xmm0 \n\t"
"movaps %%xmm0, %0 \n\t"
:"=m"(dst[i])
:"m"(src0[i]), "m"(src1[i]), "m"(src2[i])
);
}
}
else
ff_vector_fmul_add_add_c(dst, src0, src1, src2, src3, len, step);
}

void float_to_int16_3dnow(int16_t *dst, const float *src, int len){
// not bit-exact: pf2id uses different rounding than C and SSE
int i;
for(i=0; i<len; i+=4) {
asm volatile(
"pf2id %1, %%mm0 \n\t"
"pf2id %2, %%mm1 \n\t"
"packssdw %%mm1, %%mm0 \n\t"
"movq %%mm0, %0 \n\t"
:"=m"(dst[i])
:"m"(src[i]), "m"(src[i+2])
);
}
asm volatile("femms");
}
void float_to_int16_sse(int16_t *dst, const float *src, int len){
int i;
for(i=0; i<len; i+=4) {
asm volatile(
"cvtps2pi %1, %%mm0 \n\t"
"cvtps2pi %2, %%mm1 \n\t"
"packssdw %%mm1, %%mm0 \n\t"
"movq %%mm0, %0 \n\t"
:"=m"(dst[i])
:"m"(src[i]), "m"(src[i+2])
);
}
asm volatile("emms");
}

#ifdef CONFIG_SNOW_ENCODER
extern void ff_snow_horizontal_compose97i_sse2(DWTELEM *b, int width);
extern void ff_snow_horizontal_compose97i_mmx(DWTELEM *b, int width);
@@ -3199,10 +3391,25 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
}
#endif

if(mm_flags & MM_SSE)
c->vorbis_inverse_coupling = vorbis_inverse_coupling_sse;
else if(mm_flags & MM_3DNOW)
if(mm_flags & MM_3DNOW){
c->vorbis_inverse_coupling = vorbis_inverse_coupling_3dnow;
c->vector_fmul = vector_fmul_3dnow;
if(!(avctx->flags & CODEC_FLAG_BITEXACT))
c->float_to_int16 = float_to_int16_3dnow;
}
if(mm_flags & MM_3DNOWEXT)
c->vector_fmul_reverse = vector_fmul_reverse_3dnow2;
if(mm_flags & MM_SSE){
c->vorbis_inverse_coupling = vorbis_inverse_coupling_sse;
c->vector_fmul = vector_fmul_sse;
c->float_to_int16 = float_to_int16_sse;
}
if(mm_flags & MM_SSE2){
c->vector_fmul_reverse = vector_fmul_reverse_sse2;
c->vector_fmul_add_add = vector_fmul_add_add_sse2;
}
if(mm_flags & MM_3DNOW)
c->vector_fmul_add_add = vector_fmul_add_add_3dnow; // faster than sse2
}

#ifdef CONFIG_ENCODERS


+ 54
- 45
libavcodec/vorbis.c View File

@@ -192,6 +192,11 @@ static void vorbis_free(vorbis_context *vc) {
av_free(vc->mappings[i].mux);
}
av_freep(&vc->mappings);

if(vc->exp_bias){
av_freep(&vc->swin);
av_freep(&vc->lwin);
}
}

// Parse setup header -------------------------------------------------
@@ -888,6 +893,19 @@ static int vorbis_parse_id_hdr(vorbis_context *vc){
vc->swin=vwin[bl0-6];
vc->lwin=vwin[bl1-6];

if(vc->exp_bias){
int i;
float *win;
win = av_malloc(vc->blocksize_0/2 * sizeof(float));
for(i=0; i<vc->blocksize_0/2; i++)
win[i] = vc->swin[i] * (1<<15);
vc->swin = win;
win = av_malloc(vc->blocksize_1/2 * sizeof(float));
for(i=0; i<vc->blocksize_1/2; i++)
win[i] = vc->lwin[i] * (1<<15);
vc->lwin = win;
}

if ((get_bits1(gb)) == 0) {
av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
return 2;
@@ -931,6 +949,14 @@ static int vorbis_decode_init(AVCodecContext *avccontext) {
vc->avccontext = avccontext;
dsputil_init(&vc->dsp, avccontext);

if(vc->dsp.float_to_int16 == ff_float_to_int16_c) {
vc->add_bias = 385;
vc->exp_bias = 0;
} else {
vc->add_bias = 0;
vc->exp_bias = 15<<23;
}

if (!headers_len) {
av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
return -1;
@@ -1472,7 +1498,6 @@ void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
}

// Decode the audio packet using the functions above
#define BIAS 385

static int vorbis_parse_audio_packet(vorbis_context *vc) {
GetBitContext *gb=&vc->gb;
@@ -1490,6 +1515,7 @@ static int vorbis_parse_audio_packet(vorbis_context *vc) {
uint_fast8_t res_num=0;
int_fast16_t retlen=0;
uint_fast16_t saved_start=0;
float fadd_bias = vc->add_bias;

if (get_bits1(gb)) {
av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
@@ -1576,10 +1602,7 @@ static int vorbis_parse_audio_packet(vorbis_context *vc) {

for(j=0, ch_floor_ptr=vc->channel_floors;j<vc->audio_channels;++j,ch_floor_ptr+=blocksize/2) {
ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;

for(i=0;i<blocksize/2;++i) {
ch_floor_ptr[i]*=ch_res_ptr[i]; //FPMATH
}
vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2);
}

// MDCT, overlap/add, save data for next overlapping FPMATH
@@ -1600,59 +1623,54 @@ static int vorbis_parse_audio_packet(vorbis_context *vc) {

vc->mdct0.fft.imdct_calc(vc->modes[mode_number].blockflag ? &vc->mdct1 : &vc->mdct0, buf, ch_floor_ptr, buf_tmp);

//FIXME process channels together, to allow faster simd vector_fmul_add_add?
if (vc->modes[mode_number].blockflag) {
// -- overlap/add
if (previous_window) {
for(k=j, i=0;i<vc->blocksize_1/2;++i, k+=step) {
ret[k]=saved[i]+buf[i]*lwin[i]+BIAS;
}
vc->dsp.vector_fmul_add_add(ret+j, buf, lwin, saved, vc->add_bias, vc->blocksize_1/2, step);
retlen=vc->blocksize_1/2;
} else {
buf += (vc->blocksize_1-vc->blocksize_0)/4;
for(k=j, i=0;i<vc->blocksize_0/2;++i, k+=step) {
ret[k]=saved[i]+buf[i]*swin[i]+BIAS;
}
int len = (vc->blocksize_1-vc->blocksize_0)/4;
buf += len;
vc->dsp.vector_fmul_add_add(ret+j, buf, swin, saved, vc->add_bias, vc->blocksize_0/2, step);
k = vc->blocksize_0/2*step + j;
buf += vc->blocksize_0/2;
for(i=0;i<(vc->blocksize_1-vc->blocksize_0)/4;++i, k+=step) {
ret[k]=buf[i]+BIAS;
if(vc->exp_bias){
for(i=0; i<len; i++, k+=step)
((uint32_t*)ret)[k] = ((uint32_t*)buf)[i] + vc->exp_bias; // ret[k]=buf[i]*(1<<bias)
} else {
for(i=0; i<len; i++, k+=step)
ret[k] = buf[i] + fadd_bias;
}
buf=vc->buf;
retlen=vc->blocksize_0/2+(vc->blocksize_1-vc->blocksize_0)/4;
retlen=vc->blocksize_0/2+len;
}
// -- save
if (next_window) {
buf += vc->blocksize_1/2;
lwin += vc->blocksize_1/2-1;
for(i=0;i<vc->blocksize_1/2;++i) {
saved[i]=buf[i]*lwin[-i];
}
vc->dsp.vector_fmul_reverse(saved, buf, lwin, vc->blocksize_1/2);
saved_start=0;
} else {
saved_start=(vc->blocksize_1-vc->blocksize_0)/4;
buf += vc->blocksize_1/2;
for(i=0;i<saved_start;++i) {
saved[i]=buf[i];
}
swin += vc->blocksize_0/2-1;
for(i=0;i<vc->blocksize_0/2;++i) {
saved[saved_start+i]=buf[saved_start+i]*swin[-i];
}
for(i=0; i<saved_start; i++)
((uint32_t*)saved)[i] = ((uint32_t*)buf)[i] + vc->exp_bias;
vc->dsp.vector_fmul_reverse(saved+saved_start, buf+saved_start, swin, vc->blocksize_0/2);
}
} else {
// --overlap/add
for(k=j, i=0;i<saved_start;++i, k+=step) {
ret[k]=saved[i]+BIAS;
}
for(i=0;i<vc->blocksize_0/2;++i, k+=step) {
ret[k]=saved[saved_start+i]+buf[i]*swin[i]+BIAS;
if(vc->add_bias) {
for(k=j, i=0;i<saved_start;++i, k+=step)
ret[k] = saved[i] + fadd_bias;
} else {
for(k=j, i=0;i<saved_start;++i, k+=step)
ret[k] = saved[i];
}
vc->dsp.vector_fmul_add_add(ret+k, buf, swin, saved+saved_start, vc->add_bias, vc->blocksize_0/2, step);
retlen=saved_start+vc->blocksize_0/2;
// -- save
buf += vc->blocksize_0/2;
swin += vc->blocksize_0/2-1;
for(i=0;i<vc->blocksize_0/2;++i) {
saved[i]=buf[i]*swin[-i];
}
vc->dsp.vector_fmul_reverse(saved, buf, swin, vc->blocksize_0/2);
saved_start=0;
}
}
@@ -1695,16 +1713,7 @@ static int vorbis_decode_frame(AVCodecContext *avccontext,

AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);

for(i=0;i<len;++i) {
int_fast32_t tmp= ((int32_t*)vc->ret)[i];
if(tmp & 0xf0000){
// tmp= (0x43c0ffff - tmp)>>31; //ask gcc devs why this is slower
if(tmp > 0x43c0ffff) tmp= 0xFFFF;
else tmp= 0;
}
((int16_t*)data)[i]=tmp - 0x8000;
}

vc->dsp.float_to_int16(data, vc->ret, len);
*data_size=len*2;

return buf_size ;


+ 2
- 0
libavcodec/vorbis.h View File

@@ -120,6 +120,8 @@ typedef struct vorbis_context_s {
float *ret;
float *buf;
float *buf_tmp;
uint_fast32_t add_bias; // for float->int conversion
uint_fast32_t exp_bias;
} vorbis_context;




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