diff options
| author | Justin Ruggles <justin.ruggles@gmail.com> | 2011-02-13 14:49:50 -0500 |
|---|---|---|
| committer | Ronald S. Bultje <rsbultje@gmail.com> | 2011-02-13 16:49:39 -0500 |
| commit | fbb6b49dabc3398440c6dfa838aa090a7a6ebc0d (patch) | |
| tree | 050f0baf5915823f816682340bde83417541854c /libavcodec/x86/ac3dsp_mmx.c | |
| parent | 1a973feb45826a1998b4286ecfe1fa7a602b8780 (diff) | |
| download | ffmpeg-fbb6b49dabc3398440c6dfa838aa090a7a6ebc0d.tar.gz | |
ac3enc: Add x86-optimized function to speed up log2_tab().
AC3DSPContext.ac3_max_msb_abs_int16() finds the maximum MSB of the absolute
value of each element in an array of int16_t.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
Diffstat (limited to 'libavcodec/x86/ac3dsp_mmx.c')
| -rw-r--r-- | libavcodec/x86/ac3dsp_mmx.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/libavcodec/x86/ac3dsp_mmx.c b/libavcodec/x86/ac3dsp_mmx.c index 7ce3aa358d..d8af59ce8d 100644 --- a/libavcodec/x86/ac3dsp_mmx.c +++ b/libavcodec/x86/ac3dsp_mmx.c @@ -27,6 +27,11 @@ extern void ff_ac3_exponent_min_mmx (uint8_t *exp, int num_reuse_blocks, int n extern void ff_ac3_exponent_min_mmxext(uint8_t *exp, int num_reuse_blocks, int nb_coefs); extern void ff_ac3_exponent_min_sse2 (uint8_t *exp, int num_reuse_blocks, int nb_coefs); +extern int ff_ac3_max_msb_abs_int16_mmx (const int16_t *src, int len); +extern int ff_ac3_max_msb_abs_int16_mmxext(const int16_t *src, int len); +extern int ff_ac3_max_msb_abs_int16_sse2 (const int16_t *src, int len); +extern int ff_ac3_max_msb_abs_int16_ssse3 (const int16_t *src, int len); + av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c) { int mm_flags = av_get_cpu_flags(); @@ -34,12 +39,18 @@ av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c) #if HAVE_YASM if (mm_flags & AV_CPU_FLAG_MMX) { c->ac3_exponent_min = ff_ac3_exponent_min_mmx; + c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmx; } if (mm_flags & AV_CPU_FLAG_MMX2 && HAVE_MMX2) { c->ac3_exponent_min = ff_ac3_exponent_min_mmxext; + c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmxext; } if (mm_flags & AV_CPU_FLAG_SSE2 && HAVE_SSE) { c->ac3_exponent_min = ff_ac3_exponent_min_sse2; + c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_sse2; + } + if (mm_flags & AV_CPU_FLAG_SSSE3 && HAVE_SSSE3) { + c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_ssse3; } #endif } |