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AltiVec version of h264_idct(8)_dc_add 

Patch by David Conrad %lessen42 A gmail P com%

Originally committed as revision 16442 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad 2009-01-05 22:13:42 +00:00 committed by Guillaume Poirier
parent 52e57500bb
commit c663cb0d4f
1 changed files with 54 additions and 10 deletions
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64
libavcodec/ppc/h264_altivec.c
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@ -596,19 +596,61 @@ void ff_h264_idct8_add_altivec( uint8_t *dst, DCTELEM *dct, int stride ) {
ALTIVEC_STORE_SUM_CLIP(&dst[7*stride], idct7, perm_ldv, perm_stv, sel);
}
// TODO: implement this in AltiVec
static void ff_h264_idct8_dc_add_altivec(uint8_t *dst, DCTELEM *block, int stride) {
int i, j;
uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
int dc = (block[0] + 32) >> 6;
for( j = 0; j < 8; j++ )
{
for( i = 0; i < 8; i++ )
dst[i] = cm[ dst[i] + dc ];
dst += stride;
static av_always_inline void h264_idct_dc_add_internal(uint8_t *dst, DCTELEM *block, int stride, int size)
{
vec_s16 dc16;
vec_u8 dcplus, dcminus, v0, v1, v2, v3, aligner;
LOAD_ZERO;
DECLARE_ALIGNED_16(int, dc);
int i;
dc = (block[0] + 32) >> 6;
dc16 = vec_splat((vec_s16) vec_lde(0, &dc), 1);
if (size == 4)
dc16 = vec_sld(dc16, zero_s16v, 8);
dcplus = vec_packsu(dc16, zero_s16v);
dcminus = vec_packsu(vec_sub(zero_s16v, dc16), zero_s16v);
aligner = vec_lvsr(0, dst);
dcplus = vec_perm(dcplus, dcplus, aligner);
dcminus = vec_perm(dcminus, dcminus, aligner);
for (i = 0; i < size; i += 4) {
v0 = vec_ld(0, dst+0*stride);
v1 = vec_ld(0, dst+1*stride);
v2 = vec_ld(0, dst+2*stride);
v3 = vec_ld(0, dst+3*stride);
v0 = vec_adds(v0, dcplus);
v1 = vec_adds(v1, dcplus);
v2 = vec_adds(v2, dcplus);
v3 = vec_adds(v3, dcplus);
v0 = vec_subs(v0, dcminus);
v1 = vec_subs(v1, dcminus);
v2 = vec_subs(v2, dcminus);
v3 = vec_subs(v3, dcminus);
vec_st(v0, 0, dst+0*stride);
vec_st(v1, 0, dst+1*stride);
vec_st(v2, 0, dst+2*stride);
vec_st(v3, 0, dst+3*stride);
dst += 4*stride;
}
}
static void h264_idct_dc_add_altivec(uint8_t *dst, DCTELEM *block, int stride)
{
h264_idct_dc_add_internal(dst, block, stride, 4);
}
static void ff_h264_idct8_dc_add_altivec(uint8_t *dst, DCTELEM *block, int stride)
{
h264_idct_dc_add_internal(dst, block, stride, 8);
}
static void ff_h264_idct8_add4_altivec(uint8_t *dst, const int *block_offset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]){
int i;
for(i=0; i<16; i+=4){
@ -903,6 +945,8 @@ void dsputil_h264_init_ppc(DSPContext* c, AVCodecContext *avctx) {
h264_idct_add16, h264_idct_add16intra, h264_idct_add8 are implemented
c->h264_idct_add = ff_h264_idct_add_altivec;
*/
c->h264_idct_dc_add= h264_idct_dc_add_altivec;
c->h264_idct8_dc_add = ff_h264_idct8_dc_add_altivec;
c->h264_idct8_add = ff_h264_idct8_add_altivec;
c->h264_idct8_add4 = ff_h264_idct8_add4_altivec;
c->h264_v_loop_filter_luma= h264_v_loop_filter_luma_altivec;