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sizeof(s->block) isnt 64*6*2 anymore bugfix 

mpeg12 decoding optimization

Originally committed as revision 364 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-03-28 13:41:04 +00:00
parent cf8039b2cf
commit 649c00c96d
5 changed files with 32 additions and 24 deletions
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7
libavcodec/dsputil.c
View File

@ -30,6 +30,7 @@ void (*get_pixels)(DCTELEM *block, const UINT8 *pixels, int line_size);
void (*put_pixels_clamped)(const DCTELEM *block, UINT8 *pixels, int line_size);
void (*add_pixels_clamped)(const DCTELEM *block, UINT8 *pixels, int line_size);
void (*gmc1)(UINT8 *dst, UINT8 *src, int srcStride, int h, int x16, int y16, int rounder);
void (*clear_blocks)(DCTELEM *blocks);
op_pixels_abs_func pix_abs16x16;
op_pixels_abs_func pix_abs16x16_x2;
@ -866,6 +867,11 @@ void block_permute(INT16 *block)
}
#endif
void clear_blocks_c(DCTELEM *blocks)
{
memset(blocks, 0, sizeof(DCTELEM)*6*64);
}
void dsputil_init(void)
{
int i, j;
@ -890,6 +896,7 @@ void dsputil_init(void)
put_pixels_clamped = put_pixels_clamped_c;
add_pixels_clamped = add_pixels_clamped_c;
gmc1= gmc1_c;
clear_blocks= clear_blocks_c;
pix_abs16x16 = pix_abs16x16_c;
pix_abs16x16_x2 = pix_abs16x16_x2_c;

2
libavcodec/dsputil.h
View File

@ -40,11 +40,13 @@ extern void (*get_pixels)(DCTELEM *block, const UINT8 *pixels, int line_size);
extern void (*put_pixels_clamped)(const DCTELEM *block, UINT8 *pixels, int line_size);
extern void (*add_pixels_clamped)(const DCTELEM *block, UINT8 *pixels, int line_size);
extern void (*gmc1)(UINT8 *dst, UINT8 *src, int srcStride, int h, int x16, int y16, int rounder);
extern void (*clear_blocks)(DCTELEM *blocks);
void get_pixels_c(DCTELEM *block, const UINT8 *pixels, int line_size);
void put_pixels_clamped_c(const DCTELEM *block, UINT8 *pixels, int line_size);
void add_pixels_clamped_c(const DCTELEM *block, UINT8 *pixels, int line_size);
void clear_blocks_c(DCTELEM *blocks);
/* add and put pixel (decoding) */
typedef void (*op_pixels_func)(UINT8 *block, const UINT8 *pixels, int line_size, int h);

25
libavcodec/h263dec.c
View File

@ -156,6 +156,7 @@ static int h263_decode_frame(AVCodecContext *avctx,
if (s->mb_y && !s->h263_pred) {
s->first_gob_line = h263_decode_gob_header(s);
}
s->block_index[0]= s->block_wrap[0]*(s->mb_y*2 + 1) - 1;
s->block_index[1]= s->block_wrap[0]*(s->mb_y*2 + 1);
s->block_index[2]= s->block_wrap[0]*(s->mb_y*2 + 2) - 1;
@ -183,28 +184,8 @@ static int h263_decode_frame(AVCodecContext *avctx,
s->y_dc_scale = 8;
s->c_dc_scale = 8;
}
#ifdef HAVE_MMX
if (mm_flags & MM_MMX) {
asm volatile(
"pxor %%mm7, %%mm7 \n\t"
"movl $-128*6, %%eax \n\t"
"1: \n\t"
"movq %%mm7, (%0, %%eax) \n\t"
"movq %%mm7, 8(%0, %%eax) \n\t"
"movq %%mm7, 16(%0, %%eax) \n\t"
"movq %%mm7, 24(%0, %%eax) \n\t"
"addl $32, %%eax \n\t"
" js 1b \n\t"
: : "r" (((int)s->block)+128*6)
: "%eax"
);
}else{
memset(s->block, 0, sizeof(s->block));
}
#else
memset(s->block, 0, sizeof(s->block));
#endif
clear_blocks(s->block[0]);
s->mv_dir = MV_DIR_FORWARD;
s->mv_type = MV_TYPE_16X16;
if (s->h263_msmpeg4) {

20
libavcodec/i386/dsputil_mmx.c
View File

@ -1025,6 +1025,23 @@ static void sub_pixels_xy2_mmx( DCTELEM *block, const UINT8 *pixels, int line
} while(--h);
}
static void clear_blocks_mmx(DCTELEM *blocks)
{
asm volatile(
"pxor %%mm7, %%mm7 \n\t"
"movl $-128*6, %%eax \n\t"
"1: \n\t"
"movq %%mm7, (%0, %%eax) \n\t"
"movq %%mm7, 8(%0, %%eax) \n\t"
"movq %%mm7, 16(%0, %%eax) \n\t"
"movq %%mm7, 24(%0, %%eax) \n\t"
"addl $32, %%eax \n\t"
" js 1b \n\t"
: : "r" (((int)blocks)+128*6)
: "%eax"
);
}
static void just_return() { return; }
void dsputil_init_mmx(void)
@ -1049,7 +1066,8 @@ void dsputil_init_mmx(void)
get_pixels = get_pixels_mmx;
put_pixels_clamped = put_pixels_clamped_mmx;
add_pixels_clamped = add_pixels_clamped_mmx;
clear_blocks= clear_blocks_mmx;
pix_abs16x16 = pix_abs16x16_mmx;
pix_abs16x16_x2 = pix_abs16x16_x2_mmx;
pix_abs16x16_y2 = pix_abs16x16_y2_mmx;

2
libavcodec/mpeg12.c
View File

@ -1402,7 +1402,7 @@ static int mpeg_decode_slice(AVCodecContext *avctx,
}
for(;;) {
memset(s->block, 0, sizeof(s->block));
clear_blocks(s->block[0]);
ret = mpeg_decode_mb(s, s->block);
dprintf("ret=%d\n", ret);
if (ret < 0)