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/*
* x86-optimized AC-3 DSP utils
* Copyright (c) 2011 Justin Ruggles
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/mem.h"
#include "libavutil/x86/asm.h"
#include "libavutil/x86/cpu.h"
#include "dsputil_mmx.h"
#include "libavcodec/ac3.h"
#include "libavcodec/ac3dsp.h"
extern void ff_ac3_exponent_min_mmx (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
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);
extern void ff_ac3_lshift_int16_mmx (int16_t *src, unsigned int len, unsigned int shift);
extern void ff_ac3_lshift_int16_sse2(int16_t *src, unsigned int len, unsigned int shift);
extern void ff_ac3_rshift_int32_mmx (int32_t *src, unsigned int len, unsigned int shift);
extern void ff_ac3_rshift_int32_sse2(int32_t *src, unsigned int len, unsigned int shift);
extern void ff_float_to_fixed24_3dnow(int32_t *dst, const float *src, unsigned int len);
extern void ff_float_to_fixed24_sse (int32_t *dst, const float *src, unsigned int len);
extern void ff_float_to_fixed24_sse2 (int32_t *dst, const float *src, unsigned int len);
extern int ff_ac3_compute_mantissa_size_sse2(uint16_t mant_cnt[6][16]);
extern void ff_ac3_extract_exponents_3dnow(uint8_t *exp, int32_t *coef, int nb_coefs);
extern void ff_ac3_extract_exponents_sse2 (uint8_t *exp, int32_t *coef, int nb_coefs);
extern void ff_ac3_extract_exponents_ssse3(uint8_t *exp, int32_t *coef, int nb_coefs);
#if HAVE_SSE_INLINE
#define IF1(x) x
#define IF0(x)
#define MIX5(mono, stereo) \
__asm__ volatile ( \
"movss 0(%2), %%xmm5 \n" \
"movss 8(%2), %%xmm6 \n" \
"movss 24(%2), %%xmm7 \n" \
"shufps $0, %%xmm5, %%xmm5 \n" \
"shufps $0, %%xmm6, %%xmm6 \n" \
"shufps $0, %%xmm7, %%xmm7 \n" \
"1: \n" \
"movaps (%0, %1), %%xmm0 \n" \
"movaps 0x400(%0, %1), %%xmm1 \n" \
"movaps 0x800(%0, %1), %%xmm2 \n" \
"movaps 0xc00(%0, %1), %%xmm3 \n" \
"movaps 0x1000(%0, %1), %%xmm4 \n" \
"mulps %%xmm5, %%xmm0 \n" \
"mulps %%xmm6, %%xmm1 \n" \
"mulps %%xmm5, %%xmm2 \n" \
"mulps %%xmm7, %%xmm3 \n" \
"mulps %%xmm7, %%xmm4 \n" \
stereo("addps %%xmm1, %%xmm0 \n") \
"addps %%xmm1, %%xmm2 \n" \
"addps %%xmm3, %%xmm0 \n" \
"addps %%xmm4, %%xmm2 \n" \
mono("addps %%xmm2, %%xmm0 \n") \
"movaps %%xmm0, (%0, %1) \n" \
stereo("movaps %%xmm2, 0x400(%0, %1) \n") \
"add $16, %0 \n" \
"jl 1b \n" \
: "+&r"(i) \
: "r"(samples[0] + len), "r"(matrix) \
: XMM_CLOBBERS("%xmm0", "%xmm1", "%xmm2", "%xmm3", \
"%xmm4", "%xmm5", "%xmm6", "%xmm7",) \
"memory" \
);
#define MIX_MISC(stereo) \
__asm__ volatile ( \
"1: \n" \
"movaps (%3, %0), %%xmm0 \n" \
stereo("movaps %%xmm0, %%xmm1 \n") \
"mulps %%xmm4, %%xmm0 \n" \
stereo("mulps %%xmm5, %%xmm1 \n") \
"lea 1024(%3, %0), %1 \n" \
"mov %5, %2 \n" \
"2: \n" \
"movaps (%1), %%xmm2 \n" \
stereo("movaps %%xmm2, %%xmm3 \n") \
"mulps (%4, %2), %%xmm2 \n" \
stereo("mulps 16(%4, %2), %%xmm3 \n") \
"addps %%xmm2, %%xmm0 \n" \
stereo("addps %%xmm3, %%xmm1 \n") \
"add $1024, %1 \n" \
"add $32, %2 \n" \
"jl 2b \n" \
"movaps %%xmm0, (%3, %0) \n" \
stereo("movaps %%xmm1, 1024(%3, %0) \n") \
"add $16, %0 \n" \
"jl 1b \n" \
: "+&r"(i), "=&r"(j), "=&r"(k) \
: "r"(samples[0] + len), "r"(matrix_simd + in_ch), \
"g"((intptr_t) - 32 * (in_ch - 1)) \
: "memory" \
);
static void ac3_downmix_sse(float (*samples)[256], float (*matrix)[2],
int out_ch, int in_ch, int len)
{
int (*matrix_cmp)[2] = (int(*)[2])matrix;
intptr_t i, j, k;
i = -len * sizeof(float);
if (in_ch == 5 && out_ch == 2 &&
!(matrix_cmp[0][1] | matrix_cmp[2][0] |
matrix_cmp[3][1] | matrix_cmp[4][0] |
(matrix_cmp[1][0] ^ matrix_cmp[1][1]) |
(matrix_cmp[0][0] ^ matrix_cmp[2][1]))) {
MIX5(IF0, IF1);
} else if (in_ch == 5 && out_ch == 1 &&
matrix_cmp[0][0] == matrix_cmp[2][0] &&
matrix_cmp[3][0] == matrix_cmp[4][0]) {
MIX5(IF1, IF0);
} else {
DECLARE_ALIGNED(16, float, matrix_simd)[AC3_MAX_CHANNELS][2][4];
j = 2 * in_ch * sizeof(float);
__asm__ volatile (
"1: \n"
"sub $8, %0 \n"
"movss (%2, %0), %%xmm4 \n"
"movss 4(%2, %0), %%xmm5 \n"
"shufps $0, %%xmm4, %%xmm4 \n"
"shufps $0, %%xmm5, %%xmm5 \n"
"movaps %%xmm4, (%1, %0, 4) \n"
"movaps %%xmm5, 16(%1, %0, 4) \n"
"jg 1b \n"
: "+&r"(j)
: "r"(matrix_simd), "r"(matrix)
: "memory"
);
if (out_ch == 2) {
MIX_MISC(IF1);
} else {
MIX_MISC(IF0);
}
}
}
#endif /* HAVE_SSE_INLINE */
av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)
{
int mm_flags = av_get_cpu_flags();
if (EXTERNAL_MMX(mm_flags)) {
c->ac3_exponent_min = ff_ac3_exponent_min_mmx;
c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmx;
c->ac3_lshift_int16 = ff_ac3_lshift_int16_mmx;
c->ac3_rshift_int32 = ff_ac3_rshift_int32_mmx;
}
if (EXTERNAL_AMD3DNOW(mm_flags)) {
c->extract_exponents = ff_ac3_extract_exponents_3dnow;
if (!bit_exact) {
c->float_to_fixed24 = ff_float_to_fixed24_3dnow;
}
}
if (EXTERNAL_MMXEXT(mm_flags)) {
c->ac3_exponent_min = ff_ac3_exponent_min_mmxext;
c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmxext;
}
if (EXTERNAL_SSE(mm_flags)) {
c->float_to_fixed24 = ff_float_to_fixed24_sse;
}
if (EXTERNAL_SSE2(mm_flags)) {
c->ac3_exponent_min = ff_ac3_exponent_min_sse2;
c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_sse2;
c->float_to_fixed24 = ff_float_to_fixed24_sse2;
c->compute_mantissa_size = ff_ac3_compute_mantissa_size_sse2;
c->extract_exponents = ff_ac3_extract_exponents_sse2;
if (!(mm_flags & AV_CPU_FLAG_SSE2SLOW)) {
c->ac3_lshift_int16 = ff_ac3_lshift_int16_sse2;
c->ac3_rshift_int32 = ff_ac3_rshift_int32_sse2;
}
}
if (EXTERNAL_SSSE3(mm_flags)) {
c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_ssse3;
if (!(mm_flags & AV_CPU_FLAG_ATOM)) {
c->extract_exponents = ff_ac3_extract_exponents_ssse3;
}
}
#if HAVE_SSE_INLINE
if (INLINE_SSE(mm_flags)) {
c->downmix = ac3_downmix_sse;
}
#endif
}
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