| /* Copyright (c) 2013 The Chromium OS Authors. All rights reserved. |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "dsp_util.h" |
| |
| #ifndef max |
| #define max(a, b) ({ __typeof__(a) _a = (a); \ |
| __typeof__(b) _b = (b); \ |
| _a > _b ? _a : _b; }) |
| #endif |
| |
| #ifndef min |
| #define min(a, b) ({ __typeof__(a) _a = (a); \ |
| __typeof__(b) _b = (b); \ |
| _a < _b ? _a : _b; }) |
| #endif |
| |
| #undef deinterleave_stereo |
| #undef interleave_stereo |
| |
| #ifdef __ARM_NEON__ |
| #include <arm_neon.h> |
| |
| static void deinterleave_stereo(int16_t *input, float *output1, |
| float *output2, int frames) |
| { |
| /* Process 8 frames (16 samples) each loop. */ |
| /* L0 R0 L1 R1 L2 R2 L3 R3... -> L0 L1 L2 L3... R0 R1 R2 R3... */ |
| int chunk = frames >> 3; |
| frames &= 7; |
| if (chunk) { |
| __asm__ __volatile__ ( |
| "1: \n" |
| "vld2.16 {d0-d3}, [%[input]]! \n" |
| "subs %[chunk], #1 \n" |
| "vmovl.s16 q3, d3 \n" |
| "vmovl.s16 q2, d2 \n" |
| "vmovl.s16 q1, d1 \n" |
| "vmovl.s16 q0, d0 \n" |
| "vcvt.f32.s32 q3, q3, #15 \n" |
| "vcvt.f32.s32 q2, q2, #15 \n" |
| "vcvt.f32.s32 q1, q1, #15 \n" |
| "vcvt.f32.s32 q0, q0, #15 \n" |
| "vst1.32 {d4-d7}, [%[output2]]! \n" |
| "vst1.32 {d0-d3}, [%[output1]]! \n" |
| "bne 1b \n" |
| : /* output */ |
| [chunk]"+r"(chunk), |
| [input]"+r"(input), |
| [output1]"+r"(output1), |
| [output2]"+r"(output2) |
| : /* input */ |
| : /* clobber */ |
| "q0", "q1", "q2", "q3", "memory", "cc" |
| ); |
| } |
| |
| /* The remaining samples. */ |
| while (frames--) { |
| *output1++ = *input++ / 32768.0f; |
| *output2++ = *input++ / 32768.0f; |
| } |
| } |
| #define deinterleave_stereo deinterleave_stereo |
| |
| static void interleave_stereo(float *input1, float *input2, |
| int16_t *output, int frames) |
| { |
| /* Process 4 frames (8 samples) each loop. */ |
| /* L0 L1 L2 L3, R0 R1 R2 R3 -> L0 R0 L1 R1, L2 R2 L3 R3 */ |
| float32x4_t pos = vdupq_n_f32(0.5f / 32768.0f); |
| float32x4_t neg = vdupq_n_f32(-0.5f / 32768.0f); |
| int chunk = frames >> 2; |
| frames &= 3; |
| |
| if (chunk) { |
| __asm__ __volatile__ ( |
| "veor q0, q0, q0 \n" |
| "1: \n" |
| "vld1.32 {d2-d3}, [%[input1]]! \n" |
| "vld1.32 {d4-d5}, [%[input2]]! \n" |
| "subs %[chunk], #1 \n" |
| /* We try to round to the nearest number by adding 0.5 |
| * to positive input, and adding -0.5 to the negative |
| * input, then truncate. |
| */ |
| "vcgt.f32 q3, q1, q0 \n" |
| "vcgt.f32 q4, q2, q0 \n" |
| "vbsl q3, %q[pos], %q[neg] \n" |
| "vbsl q4, %q[pos], %q[neg] \n" |
| "vadd.f32 q1, q1, q3 \n" |
| "vadd.f32 q2, q2, q4 \n" |
| "vcvt.s32.f32 q1, q1, #15 \n" |
| "vcvt.s32.f32 q2, q2, #15 \n" |
| "vqmovn.s32 d2, q1 \n" |
| "vqmovn.s32 d3, q2 \n" |
| "vst2.16 {d2-d3}, [%[output]]! \n" |
| "bne 1b \n" |
| : /* output */ |
| "=r"(chunk), |
| "=r"(input1), |
| "=r"(input2), |
| "=r"(output) |
| : /* input */ |
| [chunk]"0"(chunk), |
| [input1]"1"(input1), |
| [input2]"2"(input2), |
| [output]"3"(output), |
| [pos]"w"(pos), |
| [neg]"w"(neg) |
| : /* clobber */ |
| "q0", "q1", "q2", "q3", "q4", "memory", "cc" |
| ); |
| } |
| |
| /* The remaining samples */ |
| while (frames--) { |
| float f; |
| f = *input1++; |
| f += (f > 0) ? (0.5f / 32768.0f) : (-0.5f / 32768.0f); |
| *output++ = max(-32768, min(32767, (int)(f * 32768.0f))); |
| f = *input2++; |
| f += (f > 0) ? (0.5f / 32768.0f) : (-0.5f / 32768.0f); |
| *output++ = max(-32768, min(32767, (int)(f * 32768.0f))); |
| } |
| } |
| #define interleave_stereo interleave_stereo |
| |
| #endif |
| |
| #ifdef __SSE3__ |
| #include <emmintrin.h> |
| |
| static void deinterleave_stereo(int16_t *input, float *output1, |
| float *output2, int frames) |
| { |
| /* Process 8 frames (16 samples) each loop. */ |
| /* L0 R0 L1 R1 L2 R2 L3 R3... -> L0 L1 L2 L3... R0 R1 R2 R3... */ |
| int chunk = frames >> 3; |
| frames &= 7; |
| if (chunk) { |
| __asm__ __volatile__ ( |
| "1: \n" |
| "lddqu (%[input]), %%xmm0 \n" |
| "lddqu 16(%[input]), %%xmm1 \n" |
| "add $32, %[input] \n" |
| "movdqa %%xmm0, %%xmm2 \n" |
| "movdqa %%xmm1, %%xmm3 \n" |
| "pslld $16, %%xmm0 \n" |
| "pslld $16, %%xmm1 \n" |
| "psrad $16, %%xmm2 \n" |
| "psrad $16, %%xmm3 \n" |
| "cvtdq2ps %%xmm0, %%xmm0 \n" |
| "cvtdq2ps %%xmm1, %%xmm1 \n" |
| "cvtdq2ps %%xmm2, %%xmm2 \n" |
| "cvtdq2ps %%xmm3, %%xmm3 \n" |
| "mulps %[scale_2_n31], %%xmm0 \n" |
| "mulps %[scale_2_n31], %%xmm1 \n" |
| "mulps %[scale_2_n15], %%xmm2 \n" |
| "mulps %[scale_2_n15], %%xmm3 \n" |
| "movdqu %%xmm0, (%[output1]) \n" |
| "movdqu %%xmm1, 16(%[output1]) \n" |
| "movdqu %%xmm2, (%[output2]) \n" |
| "movdqu %%xmm3, 16(%[output2]) \n" |
| "add $32, %[output1] \n" |
| "add $32, %[output2] \n" |
| "sub $1, %[chunk] \n" |
| "jnz 1b \n" |
| : /* output */ |
| [chunk]"+r"(chunk), |
| [input]"+r"(input), |
| [output1]"+r"(output1), |
| [output2]"+r"(output2) |
| : /* input */ |
| [scale_2_n31]"x"(_mm_set1_ps(1.0f/(1<<15)/(1<<16))), |
| [scale_2_n15]"x"(_mm_set1_ps(1.0f/(1<<15))) |
| : /* clobber */ |
| "xmm0", "xmm1", "xmm2", "xmm3", "memory", "cc" |
| ); |
| } |
| |
| /* The remaining samples. */ |
| while (frames--) { |
| *output1++ = *input++ / 32768.0f; |
| *output2++ = *input++ / 32768.0f; |
| } |
| } |
| #define deinterleave_stereo deinterleave_stereo |
| |
| static void interleave_stereo(float *input1, float *input2, |
| int16_t *output, int frames) |
| { |
| /* Process 4 frames (8 samples) each loop. */ |
| /* L0 L1 L2 L3, R0 R1 R2 R3 -> L0 R0 L1 R1, L2 R2 L3 R3 */ |
| int chunk = frames >> 2; |
| frames &= 3; |
| |
| if (chunk) { |
| __asm__ __volatile__ ( |
| "1: \n" |
| "lddqu (%[input1]), %%xmm0 \n" |
| "lddqu (%[input2]), %%xmm2 \n" |
| "movaps %%xmm0, %%xmm1 \n" |
| "unpcklps %%xmm2, %%xmm0 \n" |
| "unpckhps %%xmm2, %%xmm1 \n" |
| "add $16, %[input1] \n" |
| "add $16, %[input2] \n" |
| "mulps %[scale_2_15], %%xmm0 \n" |
| "mulps %[scale_2_15], %%xmm1 \n" |
| "cvtps2dq %%xmm0, %%xmm0 \n" |
| "cvtps2dq %%xmm1, %%xmm1 \n" |
| "packssdw %%xmm1, %%xmm0 \n" |
| "movdqu %%xmm0, (%[output]) \n" |
| "add $16, %[output] \n" |
| "sub $1, %[chunk] \n" |
| "jnz 1b \n" |
| : /* output */ |
| "=r"(chunk), |
| "=r"(input1), |
| "=r"(input2), |
| "=r"(output) |
| : /* input */ |
| [chunk]"0"(chunk), |
| [input1]"1"(input1), |
| [input2]"2"(input2), |
| [output]"3"(output), |
| [scale_2_15]"x"(_mm_set1_ps(1.0f*(1<<15))) |
| : /* clobber */ |
| "xmm0", "xmm1", "xmm2", "memory", "cc" |
| ); |
| } |
| |
| /* The remaining samples */ |
| while (frames--) { |
| float f; |
| f = *input1++; |
| f += (f > 0) ? (0.5f / 32768.0f) : (-0.5f / 32768.0f); |
| *output++ = max(-32768, min(32767, (int)(f * 32768.0f))); |
| f = *input2++; |
| f += (f > 0) ? (0.5f / 32768.0f) : (-0.5f / 32768.0f); |
| *output++ = max(-32768, min(32767, (int)(f * 32768.0f))); |
| } |
| } |
| #define interleave_stereo interleave_stereo |
| |
| #endif |
| |
| void dsp_util_deinterleave(int16_t *input, float *const *output, int channels, |
| int frames) |
| { |
| float *output_ptr[channels]; |
| int i, j; |
| |
| #ifdef deinterleave_stereo |
| if (channels == 2) { |
| deinterleave_stereo(input, output[0], output[1], frames); |
| return; |
| } |
| #endif |
| |
| for (i = 0; i < channels; i++) |
| output_ptr[i] = output[i]; |
| |
| for (i = 0; i < frames; i++) |
| for (j = 0; j < channels; j++) |
| *(output_ptr[j]++) = *input++ / 32768.0f; |
| } |
| |
| void dsp_util_interleave(float *const *input, int16_t *output, int channels, |
| int frames) |
| { |
| float *input_ptr[channels]; |
| int i, j; |
| |
| #ifdef interleave_stereo |
| if (channels == 2) { |
| interleave_stereo(input[0], input[1], output, frames); |
| return; |
| } |
| #endif |
| |
| for (i = 0; i < channels; i++) |
| input_ptr[i] = input[i]; |
| |
| for (i = 0; i < frames; i++) |
| for (j = 0; j < channels; j++) { |
| int16_t i16; |
| float f = *(input_ptr[j]++) * 32768.0f; |
| if (f > 32767) |
| i16 = 32767; |
| else if (f < -32768) |
| i16 = -32768; |
| else |
| i16 = (int16_t) (f > 0 ? f + 0.5f : f - 0.5f); |
| *output++ = i16; |
| } |
| } |
| |
| void dsp_enable_flush_denormal_to_zero() |
| { |
| #if defined(__i386__) || defined(__x86_64__) |
| unsigned int mxcsr; |
| mxcsr = __builtin_ia32_stmxcsr(); |
| __builtin_ia32_ldmxcsr(mxcsr | 0x8040); |
| #elif defined(__arm__) |
| int cw; |
| __asm__ __volatile__ ("mrc p10, 7, %0, cr1, cr0, 0" : "=r" (cw)); |
| __asm__ __volatile__ ("mcr p10, 7, %0, cr1, cr0, 0" : : "r" (cw | (1 << 24))); |
| #else |
| #warning "Don't know how to disable denorms. Performace may suffer." |
| #endif |
| } |
