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- /*
- * x86-optimized AC-3 DSP utils
- * Copyright (c) 2011 Justin Ruggles
- *
- * This file is part of Libav.
- *
- * Libav 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.
- *
- * Libav 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 Libav; 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 && 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 {
- DECLARE_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 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 && HAVE_7REGS
- if (INLINE_SSE(mm_flags)) {
- c->downmix = ac3_downmix_sse;
- }
- #endif
- }
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