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ac3dsp: x86: Replace inline asm for in-decoder downmixing with standalone asm
Adds a wrapper function for downmixing which detects channel count changes and updates the selected downmix function accordingly. Simplification and porting to current x86inc infrastructure by Diego Biurrun. Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
Justin Ruggles
Diego Biurrun
parent
a9ba59591e
commit
b57e38f52c
@ -1328,19 +1328,19 @@ static int decode_audio_block(AC3DecodeContext *s, int blk)
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do_imdct(s, s->channels);
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if (downmix_output) {
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s->ac3dsp.downmix(s->outptr, s->downmix_coeffs,
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ff_ac3dsp_downmix(&s->ac3dsp, s->outptr, s->downmix_coeffs,
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s->out_channels, s->fbw_channels, 256);
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}
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} else {
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if (downmix_output) {
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s->ac3dsp.downmix(s->xcfptr + 1, s->downmix_coeffs,
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ff_ac3dsp_downmix(&s->ac3dsp, s->xcfptr + 1, s->downmix_coeffs,
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s->out_channels, s->fbw_channels, 256);
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}
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if (downmix_output && !s->downmixed) {
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s->downmixed = 1;
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s->ac3dsp.downmix(s->dlyptr, s->downmix_coeffs, s->out_channels,
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s->fbw_channels, 128);
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ff_ac3dsp_downmix(&s->ac3dsp, s->dlyptr, s->downmix_coeffs,
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s->out_channels, s->fbw_channels, 128);
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}
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do_imdct(s, s->out_channels);
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@ -171,18 +171,11 @@ static void ac3_extract_exponents_c(uint8_t *exp, int32_t *coef, int nb_coefs)
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}
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}
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static void ac3_downmix_c(float **samples, float **matrix,
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int out_ch, int in_ch, int len)
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static void ac3_downmix_5_to_2_symmetric_c(float **samples, float **matrix,
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int len)
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{
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int **matrix_cmp = (int **)matrix;
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int i, j;
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int i;
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float v0, v1;
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if (in_ch == 5 && out_ch == 2 &&
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!(matrix_cmp[1][0] | matrix_cmp[0][2] |
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matrix_cmp[1][3] | matrix_cmp[0][4] |
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(matrix_cmp[0][1] ^ matrix_cmp[1][1]) |
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(matrix_cmp[0][0] ^ matrix_cmp[1][2]))) {
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float front_mix = matrix[0][0];
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float center_mix = matrix[0][1];
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float surround_mix = matrix[0][3];
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@ -199,9 +192,12 @@ static void ac3_downmix_c(float **samples, float **matrix,
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samples[0][i] = v0;
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samples[1][i] = v1;
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}
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} else if (in_ch == 5 && out_ch == 1 &&
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matrix_cmp[0][0] == matrix_cmp[0][2] &&
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matrix_cmp[0][3] == matrix_cmp[0][4]) {
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}
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static void ac3_downmix_5_to_1_symmetric_c(float **samples, float **matrix,
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int len)
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{
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int i;
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float front_mix = matrix[0][0];
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float center_mix = matrix[0][1];
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float surround_mix = matrix[0][3];
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@ -213,7 +209,15 @@ static void ac3_downmix_c(float **samples, float **matrix,
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samples[3][i] * surround_mix +
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samples[4][i] * surround_mix;
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}
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} else if (out_ch == 2) {
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}
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static void ac3_downmix_c(float **samples, float **matrix,
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int out_ch, int in_ch, int len)
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{
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int i, j;
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float v0, v1;
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if (out_ch == 2) {
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for (i = 0; i < len; i++) {
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v0 = v1 = 0.0f;
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for (j = 0; j < in_ch; j++) {
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@ -246,6 +250,38 @@ static void apply_window_int16_c(int16_t *output, const int16_t *input,
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}
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}
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void ff_ac3dsp_downmix(AC3DSPContext *c, float **samples, float **matrix,
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int out_ch, int in_ch, int len)
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{
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if (c->in_channels != in_ch || c->out_channels != out_ch) {
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int **matrix_cmp = (int **)matrix;
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c->in_channels = in_ch;
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c->out_channels = out_ch;
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c->downmix = NULL;
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if (in_ch == 5 && out_ch == 2 &&
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!(matrix_cmp[1][0] | matrix_cmp[0][2] |
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matrix_cmp[1][3] | matrix_cmp[0][4] |
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(matrix_cmp[0][1] ^ matrix_cmp[1][1]) |
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(matrix_cmp[0][0] ^ matrix_cmp[1][2]))) {
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c->downmix = ac3_downmix_5_to_2_symmetric_c;
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} else if (in_ch == 5 && out_ch == 1 &&
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matrix_cmp[0][0] == matrix_cmp[0][2] &&
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matrix_cmp[0][3] == matrix_cmp[0][4]) {
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c->downmix = ac3_downmix_5_to_1_symmetric_c;
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}
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if (ARCH_X86)
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ff_ac3dsp_set_downmix_x86(c);
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}
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if (c->downmix)
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c->downmix(samples, matrix, len);
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else
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ac3_downmix_c(samples, matrix, out_ch, in_ch, len);
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}
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av_cold void ff_ac3dsp_init(AC3DSPContext *c, int bit_exact)
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{
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c->ac3_exponent_min = ac3_exponent_min_c;
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@ -257,7 +293,9 @@ av_cold void ff_ac3dsp_init(AC3DSPContext *c, int bit_exact)
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c->update_bap_counts = ac3_update_bap_counts_c;
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c->compute_mantissa_size = ac3_compute_mantissa_size_c;
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c->extract_exponents = ac3_extract_exponents_c;
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c->downmix = ac3_downmix_c;
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c->in_channels = 0;
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c->out_channels = 0;
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c->downmix = NULL;
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c->apply_window_int16 = apply_window_int16_c;
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if (ARCH_ARM)
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@ -126,8 +126,9 @@ typedef struct AC3DSPContext {
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void (*extract_exponents)(uint8_t *exp, int32_t *coef, int nb_coefs);
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void (*downmix)(float **samples, float **matrix, int out_ch,
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int in_ch, int len);
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int out_channels;
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int in_channels;
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void (*downmix)(float **samples, float **matrix, int len);
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/**
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* Apply symmetric window in 16-bit fixed-point.
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@ -148,4 +149,8 @@ void ff_ac3dsp_init (AC3DSPContext *c, int bit_exact);
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void ff_ac3dsp_init_arm(AC3DSPContext *c, int bit_exact);
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void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact);
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void ff_ac3dsp_downmix(AC3DSPContext *c, float **samples, float **matrix,
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int out_ch, int in_ch, int len);
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void ff_ac3dsp_set_downmix_x86(AC3DSPContext *c);
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#endif /* AVCODEC_AC3DSP_H */
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@ -71,7 +71,8 @@ MMX-OBJS-$(CONFIG_MPEG4_DECODER) += x86/xvididct_mmx.o \
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x86/xvididct_sse2.o
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# subsystems
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YASM-OBJS-$(CONFIG_AC3DSP) += x86/ac3dsp.o
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YASM-OBJS-$(CONFIG_AC3DSP) += x86/ac3dsp.o \
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x86/ac3dsp_downmix.o
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YASM-OBJS-$(CONFIG_AUDIODSP) += x86/audiodsp.o
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YASM-OBJS-$(CONFIG_BSWAPDSP) += x86/bswapdsp.o
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YASM-OBJS-$(CONFIG_DCT) += x86/dct32.o
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187
libavcodec/x86/ac3dsp_downmix.asm
Normal file
187
libavcodec/x86/ac3dsp_downmix.asm
Normal file
@ -0,0 +1,187 @@
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;*****************************************************************************
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;* x86-optimized AC-3 downmixing
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;* Copyright (c) 2012 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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;******************************************************************************
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;* This is based on the channel mixing asm in libavresample, but it is
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;* simplified for only float coefficients and only 3 to 6 channels.
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;******************************************************************************
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%include "libavutil/x86/x86util.asm"
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SECTION .text
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;-----------------------------------------------------------------------------
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; functions to downmix from 3 to 6 channels to mono or stereo
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; void ff_ac3_downmix_*(float **samples, float **matrix, int len);
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;-----------------------------------------------------------------------------
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%macro AC3_DOWNMIX 2 ; %1 = in channels, %2 = out channels
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; define some names to make the code clearer
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%assign in_channels %1
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%assign out_channels %2
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%assign stereo out_channels - 1
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; determine how many matrix elements must go on the stack vs. mmregs
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%assign matrix_elements in_channels * out_channels
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%if stereo
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%assign needed_mmregs 4
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%else
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%assign needed_mmregs 3
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%endif
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%assign matrix_elements_mm num_mmregs - needed_mmregs
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%if matrix_elements < matrix_elements_mm
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%assign matrix_elements_mm matrix_elements
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%endif
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%assign total_mmregs needed_mmregs+matrix_elements_mm
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%if matrix_elements_mm < matrix_elements
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%assign matrix_elements_stack matrix_elements - matrix_elements_mm
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%else
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%assign matrix_elements_stack 0
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%endif
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cglobal ac3_downmix_%1_to_%2, 3,in_channels+1,total_mmregs,0-matrix_elements_stack*mmsize, src0, src1, len, src2, src3, src4, src5
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; load matrix pointers
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%define matrix0q r1q
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%define matrix1q r3q
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%if stereo
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mov matrix1q, [matrix0q+gprsize]
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%endif
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mov matrix0q, [matrix0q]
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; define matrix coeff names
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%assign %%i 0
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%assign %%j needed_mmregs
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%rep in_channels
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%if %%i >= matrix_elements_mm
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CAT_XDEFINE mx_stack_0_, %%i, 1
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CAT_XDEFINE mx_0_, %%i, [rsp+(%%i-matrix_elements_mm)*mmsize]
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%else
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CAT_XDEFINE mx_stack_0_, %%i, 0
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CAT_XDEFINE mx_0_, %%i, m %+ %%j
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%assign %%j %%j+1
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%endif
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%assign %%i %%i+1
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%endrep
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%if stereo
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%assign %%i 0
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%rep in_channels
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%if in_channels + %%i >= matrix_elements_mm
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CAT_XDEFINE mx_stack_1_, %%i, 1
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CAT_XDEFINE mx_1_, %%i, [rsp+(in_channels+%%i-matrix_elements_mm)*mmsize]
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%else
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CAT_XDEFINE mx_stack_1_, %%i, 0
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CAT_XDEFINE mx_1_, %%i, m %+ %%j
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%assign %%j %%j+1
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%endif
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%assign %%i %%i+1
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%endrep
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%endif
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; load/splat matrix coeffs
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%assign %%i 0
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%rep in_channels
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%if mx_stack_0_ %+ %%i
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VBROADCASTSS m0, [matrix0q+4*%%i]
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mova mx_0_ %+ %%i, m0
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%else
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VBROADCASTSS mx_0_ %+ %%i, [matrix0q+4*%%i]
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%endif
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%if stereo
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%if mx_stack_1_ %+ %%i
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VBROADCASTSS m0, [matrix1q+4*%%i]
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mova mx_1_ %+ %%i, m0
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%else
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VBROADCASTSS mx_1_ %+ %%i, [matrix1q+4*%%i]
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%endif
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%endif
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%assign %%i %%i+1
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%endrep
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lea lenq, [4*r2d]
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; load channel pointers to registers
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%assign %%i 1
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%rep (in_channels - 1)
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mov src %+ %%i %+ q, [src0q+%%i*gprsize]
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add src %+ %%i %+ q, lenq
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%assign %%i %%i+1
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%endrep
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mov src0q, [src0q]
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add src0q, lenq
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neg lenq
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.loop:
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%if stereo || mx_stack_0_0
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mova m0, [src0q+lenq]
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%endif
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%if stereo
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mulps m1, m0, mx_1_0
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%endif
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%if stereo || mx_stack_0_0
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mulps m0, m0, mx_0_0
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%else
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mulps m0, mx_0_0, [src0q+lenq]
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%endif
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%assign %%i 1
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%rep (in_channels - 1)
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%define src_ptr src %+ %%i %+ q
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; avoid extra load for mono if matrix is in a mm register
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%if stereo || mx_stack_0_ %+ %%i
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mova m2, [src_ptr+lenq]
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%endif
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%if stereo
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FMULADD_PS m1, m2, mx_1_ %+ %%i, m1, m3
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%endif
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%if stereo || mx_stack_0_ %+ %%i
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FMULADD_PS m0, m2, mx_0_ %+ %%i, m0, m2
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%else
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FMULADD_PS m0, mx_0_ %+ %%i, [src_ptr+lenq], m0, m1
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%endif
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%assign %%i %%i+1
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%endrep
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mova [src0q+lenq], m0
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%if stereo
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mova [src1q+lenq], m1
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%endif
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add lenq, mmsize
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jl .loop
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RET
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%endmacro
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%macro AC3_DOWNMIX_FUNCS 0
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%assign %%i 3
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%rep 4
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INIT_XMM sse
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AC3_DOWNMIX %%i, 1
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AC3_DOWNMIX %%i, 2
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INIT_YMM avx
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AC3_DOWNMIX %%i, 1
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AC3_DOWNMIX %%i, 2
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%if HAVE_FMA3_EXTERNAL
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INIT_YMM fma3
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AC3_DOWNMIX %%i, 1
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AC3_DOWNMIX %%i, 2
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%endif
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%assign %%i %%i+1
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%endrep
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%endmacro
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AC3_DOWNMIX_FUNCS
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@ -63,135 +63,6 @@ void ff_apply_window_int16_ssse3(int16_t *output, const int16_t *input,
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void ff_apply_window_int16_ssse3_atom(int16_t *output, const int16_t *input,
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const int16_t *window, unsigned int len);
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#if HAVE_SSE_INLINE && HAVE_7REGS
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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(%1), %%xmm5 \n" \
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"movss 4(%1), %%xmm6 \n" \
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"movss 12(%1), %%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, %2), %%xmm0 \n" \
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"movaps (%0, %3), %%xmm1 \n" \
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"movaps (%0, %4), %%xmm2 \n" \
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"movaps (%0, %5), %%xmm3 \n" \
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"movaps (%0, %6), %%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, %2) \n" \
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stereo("movaps %%xmm2, (%0, %3) \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"(matrix[0]), \
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"r"(samples[0] + len), \
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"r"(samples[1] + len), \
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"r"(samples[2] + len), \
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"r"(samples[3] + len), \
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"r"(samples[4] + len) \
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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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"mov %5, %2 \n" \
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"1: \n" \
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"mov -%c7(%6, %2, %c8), %3 \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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"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,
|
||||
int out_ch, int in_ch, int len)
|
||||
{
|
||||
int **matrix_cmp = (int **)matrix;
|
||||
intptr_t i, j, k, m;
|
||||
|
||||
i = -len * sizeof(float);
|
||||
if (in_ch == 5 && out_ch == 2 &&
|
||||
!(matrix_cmp[1][0] | matrix_cmp[0][2] |
|
||||
matrix_cmp[1][3] | matrix_cmp[0][4] |
|
||||
(matrix_cmp[0][1] ^ matrix_cmp[1][1]) |
|
||||
(matrix_cmp[0][0] ^ matrix_cmp[1][2]))) {
|
||||
MIX5(IF0, IF1);
|
||||
} else if (in_ch == 5 && out_ch == 1 &&
|
||||
matrix_cmp[0][0] == matrix_cmp[0][2] &&
|
||||
matrix_cmp[0][3] == matrix_cmp[0][4]) {
|
||||
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);
|
||||
k = in_ch * sizeof(float);
|
||||
__asm__ volatile (
|
||||
"1: \n"
|
||||
"sub $4, %1 \n"
|
||||
"sub $8, %0 \n"
|
||||
"movss (%3, %1), %%xmm4 \n"
|
||||
"movss (%4, %1), %%xmm5 \n"
|
||||
"shufps $0, %%xmm4, %%xmm4 \n"
|
||||
"shufps $0, %%xmm5, %%xmm5 \n"
|
||||
"movaps %%xmm4, (%2, %0, 4) \n"
|
||||
"movaps %%xmm5, 16(%2, %0, 4) \n"
|
||||
"jg 1b \n"
|
||||
: "+&r"(j), "+&r"(k)
|
||||
: "r"(matrix_simd), "r"(matrix[0]), "r"(matrix[1])
|
||||
: "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();
|
||||
@ -247,10 +118,47 @@ av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)
|
||||
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
|
||||
}
|
||||
|
||||
#define DOWNMIX_FUNC_OPT(ch, opt) \
|
||||
void ff_ac3_downmix_ ## ch ## _to_1_ ## opt(float **samples, \
|
||||
float **matrix, int len); \
|
||||
void ff_ac3_downmix_ ## ch ## _to_2_ ## opt(float **samples, \
|
||||
float **matrix, int len);
|
||||
|
||||
#define DOWNMIX_FUNCS(opt) \
|
||||
DOWNMIX_FUNC_OPT(3, opt) \
|
||||
DOWNMIX_FUNC_OPT(4, opt) \
|
||||
DOWNMIX_FUNC_OPT(5, opt) \
|
||||
DOWNMIX_FUNC_OPT(6, opt)
|
||||
|
||||
DOWNMIX_FUNCS(sse)
|
||||
DOWNMIX_FUNCS(avx)
|
||||
DOWNMIX_FUNCS(fma3)
|
||||
|
||||
void ff_ac3dsp_set_downmix_x86(AC3DSPContext *c)
|
||||
{
|
||||
int cpu_flags = av_get_cpu_flags();
|
||||
|
||||
#define SET_DOWNMIX(ch, suf, SUF) \
|
||||
if (ch == c->in_channels) { \
|
||||
if (EXTERNAL_ ## SUF (cpu_flags)) { \
|
||||
if (c->out_channels == 1) \
|
||||
c->downmix = ff_ac3_downmix_ ## ch ## _to_1_ ## suf; \
|
||||
else \
|
||||
c->downmix = ff_ac3_downmix_ ## ch ## _to_2_ ## suf; \
|
||||
} \
|
||||
}
|
||||
|
||||
#define SET_DOWNMIX_ALL(suf, SUF) \
|
||||
SET_DOWNMIX(3, suf, SUF) \
|
||||
SET_DOWNMIX(4, suf, SUF) \
|
||||
SET_DOWNMIX(5, suf, SUF) \
|
||||
SET_DOWNMIX(6, suf, SUF)
|
||||
|
||||
SET_DOWNMIX_ALL(sse, SSE)
|
||||
if (!(cpu_flags & AV_CPU_FLAG_AVXSLOW)) {
|
||||
SET_DOWNMIX_ALL(avx, AVX)
|
||||
SET_DOWNMIX_ALL(fma3, FMA3)
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user