mirror of
https://github.com/xenia-project/FFmpeg.git
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257 lines
12 KiB
C
257 lines
12 KiB
C
/*
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* x86-optimized AC-3 DSP functions
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* Copyright (c) 2011 Justin Ruggles
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/attributes.h"
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#include "libavutil/mem.h"
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#include "libavutil/x86/asm.h"
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#include "libavutil/x86/cpu.h"
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#include "libavcodec/ac3.h"
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#include "libavcodec/ac3dsp.h"
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void ff_ac3_exponent_min_mmx (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
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void ff_ac3_exponent_min_mmxext(uint8_t *exp, int num_reuse_blocks, int nb_coefs);
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void ff_ac3_exponent_min_sse2 (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
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int ff_ac3_max_msb_abs_int16_mmx (const int16_t *src, int len);
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int ff_ac3_max_msb_abs_int16_mmxext(const int16_t *src, int len);
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int ff_ac3_max_msb_abs_int16_sse2 (const int16_t *src, int len);
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int ff_ac3_max_msb_abs_int16_ssse3(const int16_t *src, int len);
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void ff_ac3_lshift_int16_mmx (int16_t *src, unsigned int len, unsigned int shift);
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void ff_ac3_lshift_int16_sse2(int16_t *src, unsigned int len, unsigned int shift);
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void ff_ac3_rshift_int32_mmx (int32_t *src, unsigned int len, unsigned int shift);
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void ff_ac3_rshift_int32_sse2(int32_t *src, unsigned int len, unsigned int shift);
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void ff_float_to_fixed24_3dnow(int32_t *dst, const float *src, unsigned int len);
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void ff_float_to_fixed24_sse (int32_t *dst, const float *src, unsigned int len);
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void ff_float_to_fixed24_sse2 (int32_t *dst, const float *src, unsigned int len);
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int ff_ac3_compute_mantissa_size_sse2(uint16_t mant_cnt[6][16]);
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void ff_ac3_extract_exponents_sse2 (uint8_t *exp, int32_t *coef, int nb_coefs);
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void ff_ac3_extract_exponents_ssse3(uint8_t *exp, int32_t *coef, int nb_coefs);
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void ff_apply_window_int16_round_mmxext(int16_t *output, const int16_t *input,
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const int16_t *window, unsigned int len);
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void ff_apply_window_int16_round_sse2(int16_t *output, const int16_t *input,
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const int16_t *window, unsigned int len);
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void ff_apply_window_int16_mmxext(int16_t *output, const int16_t *input,
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const int16_t *window, unsigned int len);
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void ff_apply_window_int16_sse2(int16_t *output, const int16_t *input,
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const int16_t *window, unsigned int len);
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void ff_apply_window_int16_ssse3(int16_t *output, const int16_t *input,
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const int16_t *window, unsigned int len);
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void ff_apply_window_int16_ssse3_atom(int16_t *output, const int16_t *input,
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const int16_t *window, unsigned int len);
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#if ARCH_X86_32 && defined(__INTEL_COMPILER)
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# undef HAVE_7REGS
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# define HAVE_7REGS 0
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#endif
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#if HAVE_SSE_INLINE && HAVE_7REGS
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#define IF1(x) x
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#define IF0(x)
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#define MIX5(mono, stereo) \
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__asm__ volatile ( \
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"movss 0(%1), %%xmm5 \n" \
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"movss 8(%1), %%xmm6 \n" \
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"movss 24(%1), %%xmm7 \n" \
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"shufps $0, %%xmm5, %%xmm5 \n" \
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"shufps $0, %%xmm6, %%xmm6 \n" \
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"shufps $0, %%xmm7, %%xmm7 \n" \
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"1: \n" \
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"movaps (%0, %2), %%xmm0 \n" \
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"movaps (%0, %3), %%xmm1 \n" \
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"movaps (%0, %4), %%xmm2 \n" \
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"movaps (%0, %5), %%xmm3 \n" \
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"movaps (%0, %6), %%xmm4 \n" \
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"mulps %%xmm5, %%xmm0 \n" \
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"mulps %%xmm6, %%xmm1 \n" \
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"mulps %%xmm5, %%xmm2 \n" \
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"mulps %%xmm7, %%xmm3 \n" \
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"mulps %%xmm7, %%xmm4 \n" \
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stereo("addps %%xmm1, %%xmm0 \n") \
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"addps %%xmm1, %%xmm2 \n" \
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"addps %%xmm3, %%xmm0 \n" \
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"addps %%xmm4, %%xmm2 \n" \
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mono("addps %%xmm2, %%xmm0 \n") \
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"movaps %%xmm0, (%0, %2) \n" \
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stereo("movaps %%xmm2, (%0, %3) \n") \
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"add $16, %0 \n" \
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"jl 1b \n" \
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: "+&r"(i) \
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: "r"(matrix), \
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"r"(samples[0] + len), \
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"r"(samples[1] + len), \
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"r"(samples[2] + len), \
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"r"(samples[3] + len), \
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"r"(samples[4] + len) \
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: XMM_CLOBBERS("%xmm0", "%xmm1", "%xmm2", "%xmm3", \
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"%xmm4", "%xmm5", "%xmm6", "%xmm7",) \
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"memory" \
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);
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#define MIX_MISC(stereo) \
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__asm__ volatile ( \
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"mov %5, %2 \n" \
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"1: \n" \
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"mov -%c7(%6, %2, %c8), %3 \n" \
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"movaps (%3, %0), %%xmm0 \n" \
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stereo("movaps %%xmm0, %%xmm1 \n") \
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"mulps %%xmm4, %%xmm0 \n" \
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stereo("mulps %%xmm5, %%xmm1 \n") \
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"2: \n" \
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"mov (%6, %2, %c8), %1 \n" \
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"movaps (%1, %0), %%xmm2 \n" \
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stereo("movaps %%xmm2, %%xmm3 \n") \
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"mulps (%4, %2, 8), %%xmm2 \n" \
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stereo("mulps 16(%4, %2, 8), %%xmm3 \n") \
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"addps %%xmm2, %%xmm0 \n" \
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stereo("addps %%xmm3, %%xmm1 \n") \
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"add $4, %2 \n" \
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"jl 2b \n" \
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"mov %5, %2 \n" \
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stereo("mov (%6, %2, %c8), %1 \n") \
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"movaps %%xmm0, (%3, %0) \n" \
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stereo("movaps %%xmm1, (%1, %0) \n") \
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"add $16, %0 \n" \
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"jl 1b \n" \
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: "+&r"(i), "=&r"(j), "=&r"(k), "=&r"(m) \
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: "r"(matrix_simd + in_ch), \
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"g"((intptr_t) - 4 * (in_ch - 1)), \
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"r"(samp + in_ch), \
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"i"(sizeof(float *)), "i"(sizeof(float *)/4) \
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: "memory" \
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);
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static void ac3_downmix_sse(float **samples, float (*matrix)[2],
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int out_ch, int in_ch, int len)
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{
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int (*matrix_cmp)[2] = (int(*)[2])matrix;
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intptr_t i, j, k, m;
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i = -len * sizeof(float);
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if (in_ch == 5 && out_ch == 2 &&
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!(matrix_cmp[0][1] | matrix_cmp[2][0] |
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matrix_cmp[3][1] | matrix_cmp[4][0] |
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(matrix_cmp[1][0] ^ matrix_cmp[1][1]) |
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(matrix_cmp[0][0] ^ matrix_cmp[2][1]))) {
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MIX5(IF0, IF1);
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} else if (in_ch == 5 && out_ch == 1 &&
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matrix_cmp[0][0] == matrix_cmp[2][0] &&
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matrix_cmp[3][0] == matrix_cmp[4][0]) {
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MIX5(IF1, IF0);
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} else {
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LOCAL_ALIGNED(16, float, matrix_simd, [AC3_MAX_CHANNELS], [2][4]);
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float *samp[AC3_MAX_CHANNELS];
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for (j = 0; j < in_ch; j++)
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samp[j] = samples[j] + len;
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j = 2 * in_ch * sizeof(float);
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__asm__ volatile (
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"1: \n"
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"sub $8, %0 \n"
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"movss (%2, %0), %%xmm4 \n"
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"movss 4(%2, %0), %%xmm5 \n"
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"shufps $0, %%xmm4, %%xmm4 \n"
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"shufps $0, %%xmm5, %%xmm5 \n"
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"movaps %%xmm4, (%1, %0, 4) \n"
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"movaps %%xmm5, 16(%1, %0, 4) \n"
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"jg 1b \n"
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: "+&r"(j)
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: "r"(matrix_simd), "r"(matrix)
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: "memory"
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);
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if (out_ch == 2) {
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MIX_MISC(IF1);
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} else {
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MIX_MISC(IF0);
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}
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}
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}
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#endif /* HAVE_SSE_INLINE && HAVE_7REGS */
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av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)
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{
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int cpu_flags = av_get_cpu_flags();
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if (EXTERNAL_MMX(cpu_flags)) {
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c->ac3_exponent_min = ff_ac3_exponent_min_mmx;
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c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmx;
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c->ac3_lshift_int16 = ff_ac3_lshift_int16_mmx;
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c->ac3_rshift_int32 = ff_ac3_rshift_int32_mmx;
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}
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if (EXTERNAL_AMD3DNOW(cpu_flags)) {
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if (!bit_exact) {
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c->float_to_fixed24 = ff_float_to_fixed24_3dnow;
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}
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}
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if (EXTERNAL_MMXEXT(cpu_flags)) {
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c->ac3_exponent_min = ff_ac3_exponent_min_mmxext;
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c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmxext;
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if (bit_exact) {
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c->apply_window_int16 = ff_apply_window_int16_mmxext;
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} else {
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c->apply_window_int16 = ff_apply_window_int16_round_mmxext;
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}
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}
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if (EXTERNAL_SSE(cpu_flags)) {
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c->float_to_fixed24 = ff_float_to_fixed24_sse;
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}
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if (EXTERNAL_SSE2(cpu_flags)) {
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c->ac3_exponent_min = ff_ac3_exponent_min_sse2;
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c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_sse2;
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c->float_to_fixed24 = ff_float_to_fixed24_sse2;
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c->compute_mantissa_size = ff_ac3_compute_mantissa_size_sse2;
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c->extract_exponents = ff_ac3_extract_exponents_sse2;
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if (!(cpu_flags & AV_CPU_FLAG_SSE2SLOW)) {
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c->ac3_lshift_int16 = ff_ac3_lshift_int16_sse2;
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c->ac3_rshift_int32 = ff_ac3_rshift_int32_sse2;
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}
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if (bit_exact) {
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c->apply_window_int16 = ff_apply_window_int16_sse2;
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} else if (!(cpu_flags & AV_CPU_FLAG_SSE2SLOW)) {
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c->apply_window_int16 = ff_apply_window_int16_round_sse2;
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}
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}
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if (EXTERNAL_SSSE3(cpu_flags)) {
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c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_ssse3;
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if (cpu_flags & AV_CPU_FLAG_ATOM) {
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c->apply_window_int16 = ff_apply_window_int16_ssse3_atom;
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} else {
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c->extract_exponents = ff_ac3_extract_exponents_ssse3;
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c->apply_window_int16 = ff_apply_window_int16_ssse3;
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}
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}
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#if HAVE_SSE_INLINE && HAVE_7REGS
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if (INLINE_SSE(cpu_flags)) {
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c->downmix = ac3_downmix_sse;
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}
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#endif
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}
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