| /* |
| * x86-optimized AC-3 DSP functions |
| * 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/attributes.h" |
| #include "libavutil/mem.h" |
| #include "libavutil/x86/asm.h" |
| #include "libavutil/x86/cpu.h" |
| #include "libavcodec/ac3.h" |
| #include "libavcodec/ac3dsp.h" |
| |
| void ff_ac3_exponent_min_mmx (uint8_t *exp, int num_reuse_blocks, int nb_coefs); |
| void ff_ac3_exponent_min_mmxext(uint8_t *exp, int num_reuse_blocks, int nb_coefs); |
| void ff_ac3_exponent_min_sse2 (uint8_t *exp, int num_reuse_blocks, int nb_coefs); |
| |
| int ff_ac3_max_msb_abs_int16_mmx (const int16_t *src, int len); |
| int ff_ac3_max_msb_abs_int16_mmxext(const int16_t *src, int len); |
| int ff_ac3_max_msb_abs_int16_sse2 (const int16_t *src, int len); |
| int ff_ac3_max_msb_abs_int16_ssse3(const int16_t *src, int len); |
| |
| void ff_ac3_lshift_int16_mmx (int16_t *src, unsigned int len, unsigned int shift); |
| void ff_ac3_lshift_int16_sse2(int16_t *src, unsigned int len, unsigned int shift); |
| |
| void ff_ac3_rshift_int32_mmx (int32_t *src, unsigned int len, unsigned int shift); |
| void ff_ac3_rshift_int32_sse2(int32_t *src, unsigned int len, unsigned int shift); |
| |
| void ff_float_to_fixed24_3dnow(int32_t *dst, const float *src, unsigned int len); |
| void ff_float_to_fixed24_sse (int32_t *dst, const float *src, unsigned int len); |
| void ff_float_to_fixed24_sse2 (int32_t *dst, const float *src, unsigned int len); |
| |
| int ff_ac3_compute_mantissa_size_sse2(uint16_t mant_cnt[6][16]); |
| |
| void ff_ac3_extract_exponents_sse2 (uint8_t *exp, int32_t *coef, int nb_coefs); |
| void ff_ac3_extract_exponents_ssse3(uint8_t *exp, int32_t *coef, int nb_coefs); |
| |
| void ff_apply_window_int16_round_mmxext(int16_t *output, const int16_t *input, |
| const int16_t *window, unsigned int len); |
| void ff_apply_window_int16_round_sse2(int16_t *output, const int16_t *input, |
| const int16_t *window, unsigned int len); |
| void ff_apply_window_int16_mmxext(int16_t *output, const int16_t *input, |
| const int16_t *window, unsigned int len); |
| void ff_apply_window_int16_sse2(int16_t *output, const int16_t *input, |
| const int16_t *window, unsigned int len); |
| void ff_apply_window_int16_ssse3(int16_t *output, const int16_t *input, |
| const int16_t *window, unsigned int len); |
| void ff_apply_window_int16_ssse3_atom(int16_t *output, const int16_t *input, |
| const int16_t *window, unsigned int len); |
| |
| #if ARCH_X86_32 && defined(__INTEL_COMPILER) |
| # undef HAVE_7REGS |
| # define HAVE_7REGS 0 |
| #endif |
| |
| #if HAVE_SSE_INLINE && HAVE_7REGS |
| |
| #define IF1(x) x |
| #define IF0(x) |
| |
| #define MIX5(mono, stereo) \ |
| __asm__ volatile ( \ |
| "movss 0(%1), %%xmm5 \n" \ |
| "movss 8(%1), %%xmm6 \n" \ |
| "movss 24(%1), %%xmm7 \n" \ |
| "shufps $0, %%xmm5, %%xmm5 \n" \ |
| "shufps $0, %%xmm6, %%xmm6 \n" \ |
| "shufps $0, %%xmm7, %%xmm7 \n" \ |
| "1: \n" \ |
| "movaps (%0, %2), %%xmm0 \n" \ |
| "movaps (%0, %3), %%xmm1 \n" \ |
| "movaps (%0, %4), %%xmm2 \n" \ |
| "movaps (%0, %5), %%xmm3 \n" \ |
| "movaps (%0, %6), %%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, %2) \n" \ |
| stereo("movaps %%xmm2, (%0, %3) \n") \ |
| "add $16, %0 \n" \ |
| "jl 1b \n" \ |
| : "+&r"(i) \ |
| : "r"(matrix), \ |
| "r"(samples[0] + len), \ |
| "r"(samples[1] + len), \ |
| "r"(samples[2] + len), \ |
| "r"(samples[3] + len), \ |
| "r"(samples[4] + len) \ |
| : XMM_CLOBBERS("%xmm0", "%xmm1", "%xmm2", "%xmm3", \ |
| "%xmm4", "%xmm5", "%xmm6", "%xmm7",) \ |
| "memory" \ |
| ); |
| |
| #define MIX_MISC(stereo) \ |
| __asm__ volatile ( \ |
| "mov %5, %2 \n" \ |
| "1: \n" \ |
| "mov -%c7(%6, %2, %c8), %3 \n" \ |
| "movaps (%3, %0), %%xmm0 \n" \ |
| stereo("movaps %%xmm0, %%xmm1 \n") \ |
| "mulps %%xmm4, %%xmm0 \n" \ |
| stereo("mulps %%xmm5, %%xmm1 \n") \ |
| "2: \n" \ |
| "mov (%6, %2, %c8), %1 \n" \ |
| "movaps (%1, %0), %%xmm2 \n" \ |
| stereo("movaps %%xmm2, %%xmm3 \n") \ |
| "mulps (%4, %2, 8), %%xmm2 \n" \ |
| stereo("mulps 16(%4, %2, 8), %%xmm3 \n") \ |
| "addps %%xmm2, %%xmm0 \n" \ |
| stereo("addps %%xmm3, %%xmm1 \n") \ |
| "add $4, %2 \n" \ |
| "jl 2b \n" \ |
| "mov %5, %2 \n" \ |
| stereo("mov (%6, %2, %c8), %1 \n") \ |
| "movaps %%xmm0, (%3, %0) \n" \ |
| stereo("movaps %%xmm1, (%1, %0) \n") \ |
| "add $16, %0 \n" \ |
| "jl 1b \n" \ |
| : "+&r"(i), "=&r"(j), "=&r"(k), "=&r"(m) \ |
| : "r"(matrix_simd + in_ch), \ |
| "g"((intptr_t) - 4 * (in_ch - 1)), \ |
| "r"(samp + in_ch), \ |
| "i"(sizeof(float *)), "i"(sizeof(float *)/4) \ |
| : "memory" \ |
| ); |
| |
| static void ac3_downmix_sse(float **samples, float (*matrix)[2], |
| int out_ch, int in_ch, int len) |
| { |
| int (*matrix_cmp)[2] = (int(*)[2])matrix; |
| intptr_t i, j, k, m; |
| |
| 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 { |
| LOCAL_ALIGNED(16, float, matrix_simd, [AC3_MAX_CHANNELS], [2][4]); |
| float *samp[AC3_MAX_CHANNELS]; |
| |
| for (j = 0; j < in_ch; j++) |
| samp[j] = samples[j] + len; |
| |
| 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 && HAVE_7REGS */ |
| |
| av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact) |
| { |
| int cpu_flags = av_get_cpu_flags(); |
| |
| if (EXTERNAL_MMX(cpu_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(cpu_flags)) { |
| if (!bit_exact) { |
| c->float_to_fixed24 = ff_float_to_fixed24_3dnow; |
| } |
| } |
| if (EXTERNAL_MMXEXT(cpu_flags)) { |
| c->ac3_exponent_min = ff_ac3_exponent_min_mmxext; |
| c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmxext; |
| if (bit_exact) { |
| c->apply_window_int16 = ff_apply_window_int16_mmxext; |
| } else { |
| c->apply_window_int16 = ff_apply_window_int16_round_mmxext; |
| } |
| } |
| if (EXTERNAL_SSE(cpu_flags)) { |
| c->float_to_fixed24 = ff_float_to_fixed24_sse; |
| } |
| if (EXTERNAL_SSE2(cpu_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 (!(cpu_flags & AV_CPU_FLAG_SSE2SLOW)) { |
| c->ac3_lshift_int16 = ff_ac3_lshift_int16_sse2; |
| c->ac3_rshift_int32 = ff_ac3_rshift_int32_sse2; |
| } |
| if (bit_exact) { |
| c->apply_window_int16 = ff_apply_window_int16_sse2; |
| } else if (!(cpu_flags & AV_CPU_FLAG_SSE2SLOW)) { |
| c->apply_window_int16 = ff_apply_window_int16_round_sse2; |
| } |
| } |
| if (EXTERNAL_SSSE3(cpu_flags)) { |
| c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_ssse3; |
| if (cpu_flags & AV_CPU_FLAG_ATOM) { |
| c->apply_window_int16 = ff_apply_window_int16_ssse3_atom; |
| } else { |
| c->extract_exponents = ff_ac3_extract_exponents_ssse3; |
| c->apply_window_int16 = ff_apply_window_int16_ssse3; |
| } |
| } |
| |
| #if HAVE_SSE_INLINE && HAVE_7REGS |
| if (INLINE_SSE(cpu_flags)) { |
| c->downmix = ac3_downmix_sse; |
| } |
| #endif |
| } |
