--- /dev/null
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2013 Peter Meerwald <p.meerwald@bct-electronic.com>
+
+ PulseAudio 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.
+
+ PulseAudio 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
+ General Public License for more details.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <pulse/sample.h>
+#include <pulse/xmalloc.h>
+#include <pulsecore/log.h>
+#include <pulsecore/macro.h>
+
+#include "cpu-arm.h"
+#include "remap.h"
+
+#include <arm_neon.h>
+
+static void remap_mono_to_stereo_float32ne_neon_a8(pa_remap_t *m, float *dst, const float *src, unsigned n) {
+ for (; n >= 4; n -= 4) {
+ __asm__ __volatile__ (
+ "vld1.32 {q0}, [%[src]]! \n\t"
+ "vmov q1, q0 \n\t"
+ "vst2.32 {q0,q1}, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : /* input operands */
+ : "memory", "q0", "q1" /* clobber list */
+ );
+ }
+
+ for (; n > 0; n--) {
+ dst[0] = dst[1] = src[0];
+ src++;
+ dst += 2;
+ }
+}
+
+static void remap_mono_to_stereo_float32ne_generic_arm(pa_remap_t *m, float *dst, const float *src, unsigned n) {
+ for (; n >= 2; n -= 2) {
+ __asm__ __volatile__ (
+ "ldm %[src]!, {r4,r6} \n\t"
+ "mov r5, r4 \n\t"
+ "mov r7, r6 \n\t"
+ "stm %[dst]!, {r4-r7} \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : /* input operands */
+ : "memory", "r4", "r5", "r6", "r7" /* clobber list */
+ );
+ }
+
+ if (n > 0)
+ dst[0] = dst[1] = src[0];
+}
+
+static void remap_mono_to_stereo_s16ne_neon(pa_remap_t *m, int16_t *dst, const int16_t *src, unsigned n) {
+ for (; n >= 8; n -= 8) {
+ __asm__ __volatile__ (
+ "vld1.16 {q0}, [%[src]]! \n\t"
+ "vmov q1, q0 \n\t"
+ "vst2.16 {q0,q1}, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : /* input operands */
+ : "memory", "q0", "q1" /* clobber list */
+ );
+ }
+
+ for (; n > 0; n--) {
+ dst[0] = dst[1] = src[0];
+ src++;
+ dst += 2;
+ }
+}
+
+static void remap_mono_to_ch4_float32ne_neon(pa_remap_t *m, float *dst, const float *src, unsigned n) {
+ for (; n >= 2; n -= 2) {
+ __asm__ __volatile__ (
+ "vld1.32 {d0}, [%[src]]! \n\t"
+ "vdup.f32 q1, d0[0] \n\t"
+ "vdup.f32 q2, d0[1] \n\t"
+ "vst1.32 {q1,q2}, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : /* input operands */
+ : "memory", "q0", "q1", "q2" /* clobber list */
+ );
+ }
+
+ if (n--)
+ dst[0] = dst[1] = dst[2] = dst[3] = src[0];
+}
+
+static void remap_mono_to_ch4_s16ne_neon(pa_remap_t *m, int16_t *dst, const int16_t *src, unsigned n) {
+ for (; n >= 4; n -= 4) {
+ __asm__ __volatile__ (
+ "vld1.16 {d0}, [%[src]]! \n\t"
+ "vdup.s16 d1, d0[1] \n\t"
+ "vdup.s16 d2, d0[2] \n\t"
+ "vdup.s16 d3, d0[3] \n\t"
+ "vdup.s16 d0, d0[0] \n\t"
+ "vst1.16 {d0,d1,d2,d3}, [%[dst]]!\n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : /* input operands */
+ : "memory", "d0", "d1", "d2", "d3" /* clobber list */
+ );
+ }
+
+ for (; n > 0; n--) {
+ dst[0] = dst[1] = dst[2] = dst[3] = src[0];
+ src++;
+ dst += 4;
+ }
+}
+
+static void remap_stereo_to_mono_float32ne_neon(pa_remap_t *m, float *dst, const float *src, unsigned n) {
+ const float32x4_t halve = vdupq_n_f32(0.5f);
+ for (; n >= 4; n -= 4) {
+ __asm__ __volatile__ (
+ "vld2.32 {q0,q1}, [%[src]]! \n\t"
+ "vadd.f32 q0, q0, q1 \n\t"
+ "vmul.f32 q0, q0, %q[halve] \n\t"
+ "vst1.32 {q0}, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : [halve] "w" (halve) /* input operands */
+ : "memory", "q0", "q1" /* clobber list */
+ );
+ }
+
+ for (; n > 0; n--) {
+ dst[0] = (src[0] + src[1])*0.5f;
+ src += 2;
+ dst++;
+ }
+}
+
+static void remap_stereo_to_mono_s16ne_neon(pa_remap_t *m, int16_t *dst, const int16_t *src, unsigned n) {
+ for (; n >= 8; n -= 8) {
+ __asm__ __volatile__ (
+ "vld2.16 {q0,q1}, [%[src]]! \n\t"
+ "vrhadd.s16 q0, q0, q1 \n\t"
+ "vst1.16 {q0}, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : /* input operands */
+ : "memory", "q0", "q1" /* clobber list */
+ );
+ }
+
+ for (; n > 0; n--) {
+ dst[0] = (src[0] + src[1])/2;
+ src += 2;
+ dst++;
+ }
+}
+
+static void remap_ch4_to_mono_float32ne_neon(pa_remap_t *m, float *dst, const float *src, unsigned n) {
+ const float32x2_t quart = vdup_n_f32(0.25f);
+ for (; n >= 2; n -= 2) {
+ __asm__ __volatile__ (
+ "vld4.32 {d0,d1,d2,d3}, [%[src]]!\n\t"
+ "vadd.f32 d0, d0, d1 \n\t"
+ "vadd.f32 d2, d2, d3 \n\t"
+ "vadd.f32 d0, d0, d2 \n\t"
+ "vmul.f32 d0, d0, %[quart] \n\t"
+ "vst1.32 {d0}, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : [quart] "w" (quart) /* input operands */
+ : "memory", "d0", "d1", "d2", "d3" /* clobber list */
+ );
+ }
+
+ if (n > 0)
+ dst[0] = (src[0] + src[1] + src[2] + src[3])*0.25f;
+}
+
+static void remap_ch4_to_mono_s16ne_neon(pa_remap_t *m, int16_t *dst, const int16_t *src, unsigned n) {
+ for (; n >= 4; n -= 4) {
+ __asm__ __volatile__ (
+ "vld4.16 {d0,d1,d2,d3}, [%[src]]!\n\t"
+ "vrhadd.s16 d0, d0, d1 \n\t"
+ "vrhadd.s16 d2, d2, d3 \n\t"
+ "vrhadd.s16 d0, d0, d2 \n\t"
+ "vst1.16 {d0}, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : /* input operands */
+ : "memory", "d0", "d1", "d2", "d3" /* clobber list */
+ );
+ }
+
+ for (; n > 0; n--) {
+ dst[0] = (src[0] + src[1] + src[2] + src[3])/4;
+ src += 4;
+ dst++;
+ }
+}
+
+static void remap_ch4_s16ne_neon(pa_remap_t *m, int16_t *dst, const int16_t *src, unsigned n) {
+ int32x4_t *f = m->state;
+ const int32x4_t f0 = f[0], f1 = f[1], f2 = f[2], f3 = f[3];
+
+ for (; n > 0; n--) {
+ __asm__ __volatile__ (
+ "vld1.16 {d0}, [%[src]]! \n\t"
+ "vmovl.s16 q0, d0 \n\t"
+ "vdup.s32 q1, d0[0] \n\t"
+ "vmul.s32 q1, q1, %q[f0] \n\t"
+ "vdup.s32 q2, d0[1] \n\t"
+ "vmla.s32 q1, q2, %q[f1] \n\t"
+ "vdup.s32 q2, d1[0] \n\t"
+ "vmla.s32 q1, q2, %q[f2] \n\t"
+ "vdup.s32 q2, d1[1] \n\t"
+ "vmla.s32 q1, q2, %q[f3] \n\t"
+ "vqshrn.s32 d2, q1, #16 \n\t"
+ "vst1.32 {d2}, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src)
+ : [f0] "w" (f0), [f1] "w" (f1), [f2] "w" (f2), [f3] "w" (f3)
+ : "memory", "q0", "q1", "q2"
+ );
+ }
+}
+
+static void remap_ch4_float32ne_neon(pa_remap_t *m, float *dst, const float *src, unsigned n) {
+ float32x4_t *f = m->state;
+ const float32x4_t f0 = f[0], f1 = f[1], f2 = f[2], f3 = f[3];
+
+ for (; n > 0; n--) {
+ __asm__ __volatile__ (
+ "vld1.32 {d0,d1}, [%[src]]! \n\t"
+ "vdup.f32 q1, d0[0] \n\t"
+ "vmul.f32 q1, q1, %q[f0] \n\t"
+ "vdup.f32 q2, d0[1] \n\t"
+ "vmla.f32 q1, q2, %q[f1] \n\t"
+ "vdup.f32 q2, d1[0] \n\t"
+ "vmla.f32 q1, q2, %q[f2] \n\t"
+ "vdup.f32 q2, d1[1] \n\t"
+ "vmla.f32 q1, q2, %q[f3] \n\t"
+ "vst1.32 {d2,d3}, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src)
+ : [f0] "w" (f0), [f1] "w" (f1), [f2] "w" (f2), [f3] "w" (f3)
+ : "memory", "q0", "q1", "q2"
+ );
+ }
+}
+
+static void remap_arrange_stereo_s16ne_neon(pa_remap_t *m, int16_t *dst, const int16_t *src, unsigned n) {
+ const uint8x8_t t = ((uint8x8_t *) m->state)[0];
+
+ for (; n >= 2; n -= 2) {
+ __asm__ __volatile__ (
+ "vld1.s16 d0, [%[src]]! \n\t"
+ "vtbl.8 d0, {d0}, %[t] \n\t"
+ "vst1.s16 d0, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : [t] "w" (t) /* input operands */
+ : "memory", "d0" /* clobber list */
+ );
+ }
+
+ if (n > 0) {
+ __asm__ __volatile__ (
+ "vld1.32 d0[0], [%[src]]! \n\t"
+ "vtbl.8 d0, {d0}, %[t] \n\t"
+ "vst1.32 d0[0], [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : [t] "w" (t) /* input operands */
+ : "memory", "d0" /* clobber list */
+ );
+ }
+}
+
+static void remap_arrange_ch2_ch4_s16ne_neon(pa_remap_t *m, int16_t *dst, const int16_t *src, unsigned n) {
+ const uint8x8_t t = ((uint8x8_t *) m->state)[0];
+
+ for (; n > 0; n--) {
+ __asm__ __volatile__ (
+ "vld1.32 d0[0], [%[src]]! \n\t"
+ "vtbl.8 d0, {d0}, %[t] \n\t"
+ "vst1.s16 d0, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : [t] "w" (t) /* input operands */
+ : "memory", "d0" /* clobber list */
+ );
+ }
+}
+
+static void remap_arrange_ch4_s16ne_neon(pa_remap_t *m, int16_t *dst, const int16_t *src, unsigned n) {
+ const uint8x8_t t = ((uint8x8_t *) m->state)[0];
+
+ for (; n > 0; n--) {
+ __asm__ __volatile__ (
+ "vld1.s16 d0, [%[src]]! \n\t"
+ "vtbl.8 d0, {d0}, %[t] \n\t"
+ "vst1.s16 d0, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : [t] "w" (t) /* input operands */
+ : "memory", "d0" /* clobber list */
+ );
+ }
+}
+
+static void remap_arrange_stereo_float32ne_neon(pa_remap_t *m, float *dst, const float *src, unsigned n) {
+ const uint8x8_t t = ((uint8x8_t *)m->state)[0];
+
+ for (; n > 0; n--) {
+ __asm__ __volatile__ (
+ "vld1.f32 d0, [%[src]]! \n\t"
+ "vtbl.8 d0, {d0}, %[t] \n\t"
+ "vst1.s16 {d0}, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : [t] "w" (t) /* input operands */
+ : "memory", "d0" /* clobber list */
+ );
+ }
+}
+
+static void remap_arrange_ch2_ch4_float32ne_neon(pa_remap_t *m, float *dst, const float *src, unsigned n) {
+ const uint8x8_t t0 = ((uint8x8_t *)m->state)[0];
+ const uint8x8_t t1 = ((uint8x8_t *)m->state)[1];
+
+ for (; n > 0; n--) {
+ __asm__ __volatile__ (
+ "vld1.f32 d0, [%[src]]! \n\t"
+ "vtbl.8 d1, {d0}, %[t0] \n\t"
+ "vtbl.8 d2, {d0}, %[t1] \n\t"
+ "vst1.s16 {d1,d2}, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : [t0] "w" (t0), [t1] "w" (t1) /* input operands */
+ : "memory", "d0", "d1", "d2" /* clobber list */
+ );
+ }
+}
+
+static void remap_arrange_ch4_float32ne_neon(pa_remap_t *m, float *dst, const float *src, unsigned n) {
+ const uint8x8_t t0 = ((uint8x8_t *)m->state)[0];
+ const uint8x8_t t1 = ((uint8x8_t *)m->state)[1];
+
+ for (; n > 0; n--) {
+ __asm__ __volatile__ (
+ "vld1.f32 {d0,d1}, [%[src]]! \n\t"
+ "vtbl.8 d2, {d0,d1}, %[t0] \n\t"
+ "vtbl.8 d3, {d0,d1}, %[t1] \n\t"
+ "vst1.s16 {d2,d3}, [%[dst]]! \n\t"
+ : [dst] "+r" (dst), [src] "+r" (src) /* output operands */
+ : [t0] "w" (t0), [t1] "w" (t1) /* input operands */
+ : "memory", "d0", "d1", "d2", "d3" /* clobber list */
+ );
+ }
+}
+
+static pa_cpu_arm_flag_t arm_flags;
+
+static void init_remap_neon(pa_remap_t *m) {
+ unsigned n_oc, n_ic;
+ int8_t arrange[PA_CHANNELS_MAX];
+
+ n_oc = m->o_ss.channels;
+ n_ic = m->i_ss.channels;
+
+ if (n_ic == 1 && n_oc == 2 &&
+ m->map_table_i[0][0] == 0x10000 && m->map_table_i[1][0] == 0x10000) {
+ if (arm_flags & PA_CPU_ARM_CORTEX_A8) {
+
+ pa_log_info("Using ARM NEON/A8 mono to stereo remapping");
+ pa_set_remap_func(m, (pa_do_remap_func_t) remap_mono_to_stereo_s16ne_neon,
+ (pa_do_remap_func_t) remap_mono_to_stereo_float32ne_neon_a8);
+ }
+ else {
+ pa_log_info("Using ARM NEON mono to stereo remapping");
+ pa_set_remap_func(m, (pa_do_remap_func_t) remap_mono_to_stereo_s16ne_neon,
+ (pa_do_remap_func_t) remap_mono_to_stereo_float32ne_generic_arm);
+ }
+ } else if (n_ic == 1 && n_oc == 4 &&
+ m->map_table_i[0][0] == 0x10000 && m->map_table_i[1][0] == 0x10000 &&
+ m->map_table_i[2][0] == 0x10000 && m->map_table_i[3][0] == 0x10000) {
+
+ pa_log_info("Using ARM NEON mono to 4-channel remapping");
+ pa_set_remap_func(m, (pa_do_remap_func_t) remap_mono_to_ch4_s16ne_neon,
+ (pa_do_remap_func_t) remap_mono_to_ch4_float32ne_neon);
+ } else if (n_ic == 2 && n_oc == 1 &&
+ m->map_table_i[0][0] == 0x8000 && m->map_table_i[0][1] == 0x8000) {
+
+ pa_log_info("Using ARM NEON stereo to mono remapping");
+ pa_set_remap_func(m, (pa_do_remap_func_t) remap_stereo_to_mono_s16ne_neon,
+ (pa_do_remap_func_t) remap_stereo_to_mono_float32ne_neon);
+ } else if (n_ic == 4 && n_oc == 1 &&
+ m->map_table_i[0][0] == 0x4000 && m->map_table_i[0][1] == 0x4000 &&
+ m->map_table_i[0][2] == 0x4000 && m->map_table_i[0][3] == 0x4000) {
+
+ pa_log_info("Using ARM NEON 4-channel to mono remapping");
+ pa_set_remap_func(m, (pa_do_remap_func_t) remap_ch4_to_mono_s16ne_neon,
+ (pa_do_remap_func_t) remap_ch4_to_mono_float32ne_neon);
+ } else if (pa_setup_remap_arrange(m, arrange) &&
+ ((n_ic == 2 && n_oc == 2) ||
+ (n_ic == 2 && n_oc == 4) ||
+ (n_ic == 4 && n_oc == 4))) {
+ unsigned o;
+
+ if (n_ic == 2 && n_oc == 2) {
+ pa_log_info("Using NEON stereo arrange remapping");
+ pa_set_remap_func(m, (pa_do_remap_func_t) remap_arrange_stereo_s16ne_neon,
+ (pa_do_remap_func_t) remap_arrange_stereo_float32ne_neon);
+ } else if (n_ic == 2 && n_oc == 4) {
+ pa_log_info("Using NEON 2-channel to 4-channel arrange remapping");
+ pa_set_remap_func(m, (pa_do_remap_func_t) remap_arrange_ch2_ch4_s16ne_neon,
+ (pa_do_remap_func_t) remap_arrange_ch2_ch4_float32ne_neon);
+ } else if (n_ic == 4 && n_oc == 4) {
+ pa_log_info("Using NEON 4-channel arrange remapping");
+ pa_set_remap_func(m, (pa_do_remap_func_t) remap_arrange_ch4_s16ne_neon,
+ (pa_do_remap_func_t) remap_arrange_ch4_float32ne_neon);
+ }
+
+ /* setup state */
+ switch (m->format) {
+ case PA_SAMPLE_S16NE: {
+ uint8x8_t *t = m->state = pa_xnew0(uint8x8_t, 1);
+ for (o = 0; o < 4; o++) {
+ if (arrange[o % n_oc] >= 0) {
+ /* convert channel index to vtbl indices */
+ unsigned frame = o / n_oc;
+ ((uint8_t *) t)[o * 2 + 0] = (frame * n_oc + arrange[o % n_oc]) * 2 + 0;
+ ((uint8_t *) t)[o * 2 + 1] = (frame * n_oc + arrange[o % n_oc]) * 2 + 1;
+ } else {
+ /* use invalid table indices to map to 0 */
+ ((uint8_t *) t)[o * 2 + 0] = 0xff;
+ ((uint8_t *) t)[o * 2 + 1] = 0xff;
+ }
+ }
+ break;
+ }
+ case PA_SAMPLE_FLOAT32NE: {
+ uint8x8_t *t = m->state = pa_xnew0(uint8x8_t, 2);
+ for (o = 0; o < n_oc; o++) {
+ if (arrange[o] >= 0) {
+ /* convert channel index to vtbl indices */
+ ((uint8_t *) t)[o * 4 + 0] = arrange[o] * 4 + 0;
+ ((uint8_t *) t)[o * 4 + 1] = arrange[o] * 4 + 1;
+ ((uint8_t *) t)[o * 4 + 2] = arrange[o] * 4 + 2;
+ ((uint8_t *) t)[o * 4 + 3] = arrange[o] * 4 + 3;
+ } else {
+ /* use invalid table indices to map to 0 */
+ ((uint8_t *) t)[o * 4 + 0] = 0xff;
+ ((uint8_t *) t)[o * 4 + 1] = 0xff;
+ ((uint8_t *) t)[o * 4 + 2] = 0xff;
+ ((uint8_t *) t)[o * 4 + 3] = 0xff;
+ }
+ }
+ break;
+ }
+ default:
+ pa_assert_not_reached();
+ }
+ } else if (n_ic == 4 && n_oc == 4) {
+ unsigned i, o;
+
+ pa_log_info("Using ARM NEON 4-channel remapping");
+ pa_set_remap_func(m, (pa_do_remap_func_t) remap_ch4_s16ne_neon,
+ (pa_do_remap_func_t) remap_ch4_float32ne_neon);
+
+ /* setup state */
+ switch (m->format) {
+ case PA_SAMPLE_S16NE: {
+ int32x4_t *f = m->state = pa_xnew0(int32x4_t, 4);
+ for (o = 0; o < 4; o++) {
+ for (i = 0; i < 4; i++) {
+ ((int *) &f[i])[o] = PA_CLAMP_UNLIKELY(m->map_table_i[o][i], 0, 0x10000);
+ }
+ }
+ break;
+ }
+ case PA_SAMPLE_FLOAT32NE: {
+ float32x4_t *f = m->state = pa_xnew0(float32x4_t, 4);
+ for (o = 0; o < 4; o++) {
+ for (i = 0; i < 4; i++) {
+ ((float *) &f[i])[o] = PA_CLAMP_UNLIKELY(m->map_table_f[o][i], 0.0f, 1.0f);
+ }
+ }
+ break;
+ }
+ default:
+ pa_assert_not_reached();
+ }
+ }
+}
+
+void pa_remap_func_init_neon(pa_cpu_arm_flag_t flags) {
+ pa_log_info("Initialising ARM NEON optimized remappers.");
+ arm_flags = flags;
+ pa_set_init_remap_func((pa_init_remap_func_t) init_remap_neon);
+}