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author | David Conrad <lessen42@gmail.com> | 2009-01-05 22:13:42 +0000 |
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committer | Guillaume Poirier <gpoirier@mplayerhq.hu> | 2009-01-05 22:13:42 +0000 |
commit | c663cb0d4fa30be5e942c196714d1d659cfab7aa (patch) | |
tree | c89a18c9eb0c5ebc992fd6452490f6d16e84638e /libavcodec/ppc | |
parent | 52e57500bb4295404a5cf63d4050b8e1ab530479 (diff) | |
download | ffmpeg-streaming-c663cb0d4fa30be5e942c196714d1d659cfab7aa.zip ffmpeg-streaming-c663cb0d4fa30be5e942c196714d1d659cfab7aa.tar.gz |
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
Diffstat (limited to 'libavcodec/ppc')
-rw-r--r-- | libavcodec/ppc/h264_altivec.c | 64 |
1 files changed, 54 insertions, 10 deletions
diff --git a/libavcodec/ppc/h264_altivec.c b/libavcodec/ppc/h264_altivec.c index 50a35ca..67b20f0 100644 --- a/libavcodec/ppc/h264_altivec.c +++ b/libavcodec/ppc/h264_altivec.c @@ -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; |