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213 lines
9.6 KiB
213 lines
9.6 KiB
/* |
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* x86-optimized AC-3 DSP utils |
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* Copyright (c) 2011 Justin Ruggles |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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/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 "dsputil_mmx.h" |
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#include "libavcodec/ac3.h" |
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#include "libavcodec/ac3dsp.h" |
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extern void ff_ac3_exponent_min_mmx (uint8_t *exp, int num_reuse_blocks, int nb_coefs); |
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extern void ff_ac3_exponent_min_mmxext(uint8_t *exp, int num_reuse_blocks, int nb_coefs); |
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extern void ff_ac3_exponent_min_sse2 (uint8_t *exp, int num_reuse_blocks, int nb_coefs); |
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extern int ff_ac3_max_msb_abs_int16_mmx (const int16_t *src, int len); |
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extern int ff_ac3_max_msb_abs_int16_mmx2 (const int16_t *src, int len); |
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extern int ff_ac3_max_msb_abs_int16_sse2 (const int16_t *src, int len); |
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extern int ff_ac3_max_msb_abs_int16_ssse3(const int16_t *src, int len); |
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extern void ff_ac3_lshift_int16_mmx (int16_t *src, unsigned int len, unsigned int shift); |
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extern void ff_ac3_lshift_int16_sse2(int16_t *src, unsigned int len, unsigned int shift); |
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extern void ff_ac3_rshift_int32_mmx (int32_t *src, unsigned int len, unsigned int shift); |
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extern void ff_ac3_rshift_int32_sse2(int32_t *src, unsigned int len, unsigned int shift); |
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extern void ff_float_to_fixed24_3dnow(int32_t *dst, const float *src, unsigned int len); |
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extern void ff_float_to_fixed24_sse (int32_t *dst, const float *src, unsigned int len); |
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extern void ff_float_to_fixed24_sse2 (int32_t *dst, const float *src, unsigned int len); |
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extern int ff_ac3_compute_mantissa_size_sse2(uint16_t mant_cnt[6][16]); |
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extern void ff_ac3_extract_exponents_3dnow(uint8_t *exp, int32_t *coef, int nb_coefs); |
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extern void ff_ac3_extract_exponents_sse2 (uint8_t *exp, int32_t *coef, int nb_coefs); |
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extern void ff_ac3_extract_exponents_ssse3(uint8_t *exp, int32_t *coef, int nb_coefs); |
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#if HAVE_SSE_INLINE |
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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(%2), %%xmm5 \n" \ |
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"movss 8(%2), %%xmm6 \n" \ |
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"movss 24(%2), %%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, %1), %%xmm0 \n" \ |
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"movaps 0x400(%0, %1), %%xmm1 \n" \ |
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"movaps 0x800(%0, %1), %%xmm2 \n" \ |
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"movaps 0xc00(%0, %1), %%xmm3 \n" \ |
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"movaps 0x1000(%0, %1), %%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, %1) \n" \ |
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stereo("movaps %%xmm2, 0x400(%0, %1) \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"(samples[0] + len), "r"(matrix) \ |
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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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"1: \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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"lea 1024(%3, %0), %1 \n" \ |
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"mov %5, %2 \n" \ |
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"2: \n" \ |
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"movaps (%1), %%xmm2 \n" \ |
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stereo("movaps %%xmm2, %%xmm3 \n") \ |
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"mulps (%4, %2), %%xmm2 \n" \ |
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stereo("mulps 16(%4, %2), %%xmm3 \n") \ |
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"addps %%xmm2, %%xmm0 \n" \ |
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stereo("addps %%xmm3, %%xmm1 \n") \ |
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"add $1024, %1 \n" \ |
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"add $32, %2 \n" \ |
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"jl 2b \n" \ |
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"movaps %%xmm0, (%3, %0) \n" \ |
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stereo("movaps %%xmm1, 1024(%3, %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) \ |
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: "r"(samples[0] + len), "r"(matrix_simd + in_ch), \ |
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"g"((intptr_t) - 32 * (in_ch - 1)) \ |
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: "memory" \ |
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); |
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static void ac3_downmix_sse(float (*samples)[256], 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; |
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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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DECLARE_ALIGNED(16, float, matrix_simd)[AC3_MAX_CHANNELS][2][4]; |
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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 */ |
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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 mm_flags = av_get_cpu_flags(); |
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if (EXTERNAL_MMX(mm_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(mm_flags)) { |
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c->extract_exponents = ff_ac3_extract_exponents_3dnow; |
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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(mm_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_mmx2; |
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} |
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if (EXTERNAL_SSE(mm_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(mm_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 (!(mm_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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} |
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if (EXTERNAL_SSSE3(mm_flags)) { |
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c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_ssse3; |
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if (!(mm_flags & AV_CPU_FLAG_ATOM)) { |
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c->extract_exponents = ff_ac3_extract_exponents_ssse3; |
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} |
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} |
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#if HAVE_SSE_INLINE |
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if (INLINE_SSE(mm_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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