| /* |
| * Copyright (c) 2012 |
| * MIPS Technologies, Inc., California. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * Authors: Darko Laus (darko@mips.com) |
| * Djordje Pesut (djordje@mips.com) |
| * Mirjana Vulin (mvulin@mips.com) |
| * |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * Reference: libavcodec/aacdec.c |
| */ |
| |
| #include "libavcodec/aac.h" |
| #include "aacdec_mips.h" |
| #include "libavcodec/aactab.h" |
| #include "libavcodec/sinewin.h" |
| #include "libavutil/mips/asmdefs.h" |
| |
| #if HAVE_INLINE_ASM |
| static av_always_inline void float_copy(float *dst, const float *src, int count) |
| { |
| // Copy 'count' floats from src to dst |
| const float *loop_end = src + count; |
| int temp[8]; |
| |
| // count must be a multiple of 8 |
| av_assert2(count % 8 == 0); |
| |
| // loop unrolled 8 times |
| __asm__ volatile ( |
| ".set push \n\t" |
| ".set noreorder \n\t" |
| "1: \n\t" |
| "lw %[temp0], 0(%[src]) \n\t" |
| "lw %[temp1], 4(%[src]) \n\t" |
| "lw %[temp2], 8(%[src]) \n\t" |
| "lw %[temp3], 12(%[src]) \n\t" |
| "lw %[temp4], 16(%[src]) \n\t" |
| "lw %[temp5], 20(%[src]) \n\t" |
| "lw %[temp6], 24(%[src]) \n\t" |
| "lw %[temp7], 28(%[src]) \n\t" |
| PTR_ADDIU "%[src], %[src], 32 \n\t" |
| "sw %[temp0], 0(%[dst]) \n\t" |
| "sw %[temp1], 4(%[dst]) \n\t" |
| "sw %[temp2], 8(%[dst]) \n\t" |
| "sw %[temp3], 12(%[dst]) \n\t" |
| "sw %[temp4], 16(%[dst]) \n\t" |
| "sw %[temp5], 20(%[dst]) \n\t" |
| "sw %[temp6], 24(%[dst]) \n\t" |
| "sw %[temp7], 28(%[dst]) \n\t" |
| "bne %[src], %[loop_end], 1b \n\t" |
| PTR_ADDIU "%[dst], %[dst], 32 \n\t" |
| ".set pop \n\t" |
| |
| : [temp0]"=&r"(temp[0]), [temp1]"=&r"(temp[1]), |
| [temp2]"=&r"(temp[2]), [temp3]"=&r"(temp[3]), |
| [temp4]"=&r"(temp[4]), [temp5]"=&r"(temp[5]), |
| [temp6]"=&r"(temp[6]), [temp7]"=&r"(temp[7]), |
| [src]"+r"(src), [dst]"+r"(dst) |
| : [loop_end]"r"(loop_end) |
| : "memory" |
| ); |
| } |
| |
| static av_always_inline int lcg_random(unsigned previous_val) |
| { |
| union { unsigned u; int s; } v = { previous_val * 1664525u + 1013904223 }; |
| return v.s; |
| } |
| |
| static void imdct_and_windowing_mips(AACContext *ac, SingleChannelElement *sce) |
| { |
| IndividualChannelStream *ics = &sce->ics; |
| float *in = sce->coeffs; |
| float *out = sce->ret; |
| float *saved = sce->saved; |
| const float *swindow = ics->use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128; |
| const float *lwindow_prev = ics->use_kb_window[1] ? ff_aac_kbd_long_1024 : ff_sine_1024; |
| const float *swindow_prev = ics->use_kb_window[1] ? ff_aac_kbd_short_128 : ff_sine_128; |
| float *buf = ac->buf_mdct; |
| int i; |
| |
| if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) { |
| for (i = 0; i < 1024; i += 128) |
| ac->mdct_small.imdct_half(&ac->mdct_small, buf + i, in + i); |
| } else |
| ac->mdct.imdct_half(&ac->mdct, buf, in); |
| |
| /* window overlapping |
| * NOTE: To simplify the overlapping code, all 'meaningless' short to long |
| * and long to short transitions are considered to be short to short |
| * transitions. This leaves just two cases (long to long and short to short) |
| * with a little special sauce for EIGHT_SHORT_SEQUENCE. |
| */ |
| if ((ics->window_sequence[1] == ONLY_LONG_SEQUENCE || ics->window_sequence[1] == LONG_STOP_SEQUENCE) && |
| (ics->window_sequence[0] == ONLY_LONG_SEQUENCE || ics->window_sequence[0] == LONG_START_SEQUENCE)) { |
| ac->fdsp->vector_fmul_window( out, saved, buf, lwindow_prev, 512); |
| } else { |
| float_copy(out, saved, 448); |
| |
| if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) { |
| { |
| float wi; |
| float wj; |
| int i; |
| float temp0, temp1, temp2, temp3; |
| float *dst0 = out + 448 + 0*128; |
| float *dst1 = dst0 + 64 + 63; |
| float *dst2 = saved + 63; |
| float *win0 = (float*)swindow; |
| float *win1 = win0 + 64 + 63; |
| float *win0_prev = (float*)swindow_prev; |
| float *win1_prev = win0_prev + 64 + 63; |
| float *src0_prev = saved + 448; |
| float *src1_prev = buf + 0*128 + 63; |
| float *src0 = buf + 0*128 + 64; |
| float *src1 = buf + 1*128 + 63; |
| |
| for(i = 0; i < 64; i++) |
| { |
| temp0 = src0_prev[0]; |
| temp1 = src1_prev[0]; |
| wi = *win0_prev; |
| wj = *win1_prev; |
| temp2 = src0[0]; |
| temp3 = src1[0]; |
| dst0[0] = temp0 * wj - temp1 * wi; |
| dst1[0] = temp0 * wi + temp1 * wj; |
| |
| wi = *win0; |
| wj = *win1; |
| |
| temp0 = src0[128]; |
| temp1 = src1[128]; |
| dst0[128] = temp2 * wj - temp3 * wi; |
| dst1[128] = temp2 * wi + temp3 * wj; |
| |
| temp2 = src0[256]; |
| temp3 = src1[256]; |
| dst0[256] = temp0 * wj - temp1 * wi; |
| dst1[256] = temp0 * wi + temp1 * wj; |
| dst0[384] = temp2 * wj - temp3 * wi; |
| dst1[384] = temp2 * wi + temp3 * wj; |
| |
| temp0 = src0[384]; |
| temp1 = src1[384]; |
| dst0[512] = temp0 * wj - temp1 * wi; |
| dst2[0] = temp0 * wi + temp1 * wj; |
| |
| src0++; |
| src1--; |
| src0_prev++; |
| src1_prev--; |
| win0++; |
| win1--; |
| win0_prev++; |
| win1_prev--; |
| dst0++; |
| dst1--; |
| dst2--; |
| } |
| } |
| } else { |
| ac->fdsp->vector_fmul_window(out + 448, saved + 448, buf, swindow_prev, 64); |
| float_copy(out + 576, buf + 64, 448); |
| } |
| } |
| |
| // buffer update |
| if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) { |
| ac->fdsp->vector_fmul_window(saved + 64, buf + 4*128 + 64, buf + 5*128, swindow, 64); |
| ac->fdsp->vector_fmul_window(saved + 192, buf + 5*128 + 64, buf + 6*128, swindow, 64); |
| ac->fdsp->vector_fmul_window(saved + 320, buf + 6*128 + 64, buf + 7*128, swindow, 64); |
| float_copy(saved + 448, buf + 7*128 + 64, 64); |
| } else if (ics->window_sequence[0] == LONG_START_SEQUENCE) { |
| float_copy(saved, buf + 512, 448); |
| float_copy(saved + 448, buf + 7*128 + 64, 64); |
| } else { // LONG_STOP or ONLY_LONG |
| float_copy(saved, buf + 512, 512); |
| } |
| } |
| |
| static void apply_ltp_mips(AACContext *ac, SingleChannelElement *sce) |
| { |
| const LongTermPrediction *ltp = &sce->ics.ltp; |
| const uint16_t *offsets = sce->ics.swb_offset; |
| int i, sfb; |
| int j, k; |
| |
| if (sce->ics.window_sequence[0] != EIGHT_SHORT_SEQUENCE) { |
| float *predTime = sce->ret; |
| float *predFreq = ac->buf_mdct; |
| float *p_predTime; |
| int16_t num_samples = 2048; |
| |
| if (ltp->lag < 1024) |
| num_samples = ltp->lag + 1024; |
| j = (2048 - num_samples) >> 2; |
| k = (2048 - num_samples) & 3; |
| p_predTime = &predTime[num_samples]; |
| |
| for (i = 0; i < num_samples; i++) |
| predTime[i] = sce->ltp_state[i + 2048 - ltp->lag] * ltp->coef; |
| for (i = 0; i < j; i++) { |
| |
| /* loop unrolled 4 times */ |
| __asm__ volatile ( |
| "sw $0, 0(%[p_predTime]) \n\t" |
| "sw $0, 4(%[p_predTime]) \n\t" |
| "sw $0, 8(%[p_predTime]) \n\t" |
| "sw $0, 12(%[p_predTime]) \n\t" |
| PTR_ADDIU "%[p_predTime], %[p_predTime], 16 \n\t" |
| |
| : [p_predTime]"+r"(p_predTime) |
| : |
| : "memory" |
| ); |
| } |
| for (i = 0; i < k; i++) { |
| |
| __asm__ volatile ( |
| "sw $0, 0(%[p_predTime]) \n\t" |
| PTR_ADDIU "%[p_predTime], %[p_predTime], 4 \n\t" |
| |
| : [p_predTime]"+r"(p_predTime) |
| : |
| : "memory" |
| ); |
| } |
| |
| ac->windowing_and_mdct_ltp(ac, predFreq, predTime, &sce->ics); |
| |
| if (sce->tns.present) |
| ac->apply_tns(predFreq, &sce->tns, &sce->ics, 0); |
| |
| for (sfb = 0; sfb < FFMIN(sce->ics.max_sfb, MAX_LTP_LONG_SFB); sfb++) |
| if (ltp->used[sfb]) |
| for (i = offsets[sfb]; i < offsets[sfb + 1]; i++) |
| sce->coeffs[i] += predFreq[i]; |
| } |
| } |
| |
| #if HAVE_MIPSFPU |
| static av_always_inline void fmul_and_reverse(float *dst, const float *src0, const float *src1, int count) |
| { |
| /* Multiply 'count' floats in src0 by src1 and store the results in dst in reverse */ |
| /* This should be equivalent to a normal fmul, followed by reversing dst */ |
| |
| // count must be a multiple of 4 |
| av_assert2(count % 4 == 0); |
| |
| // move src0 and src1 to the last element of their arrays |
| src0 += count - 1; |
| src1 += count - 1; |
| |
| for (; count > 0; count -= 4){ |
| float temp[12]; |
| |
| /* loop unrolled 4 times */ |
| __asm__ volatile ( |
| "lwc1 %[temp0], 0(%[ptr2]) \n\t" |
| "lwc1 %[temp1], -4(%[ptr2]) \n\t" |
| "lwc1 %[temp2], -8(%[ptr2]) \n\t" |
| "lwc1 %[temp3], -12(%[ptr2]) \n\t" |
| "lwc1 %[temp4], 0(%[ptr3]) \n\t" |
| "lwc1 %[temp5], -4(%[ptr3]) \n\t" |
| "lwc1 %[temp6], -8(%[ptr3]) \n\t" |
| "lwc1 %[temp7], -12(%[ptr3]) \n\t" |
| "mul.s %[temp8], %[temp0], %[temp4] \n\t" |
| "mul.s %[temp9], %[temp1], %[temp5] \n\t" |
| "mul.s %[temp10], %[temp2], %[temp6] \n\t" |
| "mul.s %[temp11], %[temp3], %[temp7] \n\t" |
| "swc1 %[temp8], 0(%[ptr1]) \n\t" |
| "swc1 %[temp9], 4(%[ptr1]) \n\t" |
| "swc1 %[temp10], 8(%[ptr1]) \n\t" |
| "swc1 %[temp11], 12(%[ptr1]) \n\t" |
| PTR_ADDIU "%[ptr1], %[ptr1], 16 \n\t" |
| PTR_ADDIU "%[ptr2], %[ptr2], -16 \n\t" |
| PTR_ADDIU "%[ptr3], %[ptr3], -16 \n\t" |
| |
| : [temp0]"=&f"(temp[0]), [temp1]"=&f"(temp[1]), |
| [temp2]"=&f"(temp[2]), [temp3]"=&f"(temp[3]), |
| [temp4]"=&f"(temp[4]), [temp5]"=&f"(temp[5]), |
| [temp6]"=&f"(temp[6]), [temp7]"=&f"(temp[7]), |
| [temp8]"=&f"(temp[8]), [temp9]"=&f"(temp[9]), |
| [temp10]"=&f"(temp[10]), [temp11]"=&f"(temp[11]), |
| [ptr1]"+r"(dst), [ptr2]"+r"(src0), [ptr3]"+r"(src1) |
| : |
| : "memory" |
| ); |
| } |
| } |
| |
| static void update_ltp_mips(AACContext *ac, SingleChannelElement *sce) |
| { |
| IndividualChannelStream *ics = &sce->ics; |
| float *saved = sce->saved; |
| float *saved_ltp = sce->coeffs; |
| const float *lwindow = ics->use_kb_window[0] ? ff_aac_kbd_long_1024 : ff_sine_1024; |
| const float *swindow = ics->use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128; |
| float temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; |
| |
| if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) { |
| float *p_saved_ltp = saved_ltp + 576; |
| float *loop_end1 = p_saved_ltp + 448; |
| |
| float_copy(saved_ltp, saved, 512); |
| |
| /* loop unrolled 8 times */ |
| __asm__ volatile ( |
| "1: \n\t" |
| "sw $0, 0(%[p_saved_ltp]) \n\t" |
| "sw $0, 4(%[p_saved_ltp]) \n\t" |
| "sw $0, 8(%[p_saved_ltp]) \n\t" |
| "sw $0, 12(%[p_saved_ltp]) \n\t" |
| "sw $0, 16(%[p_saved_ltp]) \n\t" |
| "sw $0, 20(%[p_saved_ltp]) \n\t" |
| "sw $0, 24(%[p_saved_ltp]) \n\t" |
| "sw $0, 28(%[p_saved_ltp]) \n\t" |
| PTR_ADDIU "%[p_saved_ltp],%[p_saved_ltp], 32 \n\t" |
| "bne %[p_saved_ltp], %[loop_end1], 1b \n\t" |
| |
| : [p_saved_ltp]"+r"(p_saved_ltp) |
| : [loop_end1]"r"(loop_end1) |
| : "memory" |
| ); |
| |
| ac->fdsp->vector_fmul_reverse(saved_ltp + 448, ac->buf_mdct + 960, &swindow[64], 64); |
| fmul_and_reverse(saved_ltp + 512, ac->buf_mdct + 960, swindow, 64); |
| } else if (ics->window_sequence[0] == LONG_START_SEQUENCE) { |
| float *buff0 = saved; |
| float *buff1 = saved_ltp; |
| float *loop_end = saved + 448; |
| |
| /* loop unrolled 8 times */ |
| __asm__ volatile ( |
| ".set push \n\t" |
| ".set noreorder \n\t" |
| "1: \n\t" |
| "lw %[temp0], 0(%[src]) \n\t" |
| "lw %[temp1], 4(%[src]) \n\t" |
| "lw %[temp2], 8(%[src]) \n\t" |
| "lw %[temp3], 12(%[src]) \n\t" |
| "lw %[temp4], 16(%[src]) \n\t" |
| "lw %[temp5], 20(%[src]) \n\t" |
| "lw %[temp6], 24(%[src]) \n\t" |
| "lw %[temp7], 28(%[src]) \n\t" |
| PTR_ADDIU "%[src], %[src], 32 \n\t" |
| "sw %[temp0], 0(%[dst]) \n\t" |
| "sw %[temp1], 4(%[dst]) \n\t" |
| "sw %[temp2], 8(%[dst]) \n\t" |
| "sw %[temp3], 12(%[dst]) \n\t" |
| "sw %[temp4], 16(%[dst]) \n\t" |
| "sw %[temp5], 20(%[dst]) \n\t" |
| "sw %[temp6], 24(%[dst]) \n\t" |
| "sw %[temp7], 28(%[dst]) \n\t" |
| "sw $0, 2304(%[dst]) \n\t" |
| "sw $0, 2308(%[dst]) \n\t" |
| "sw $0, 2312(%[dst]) \n\t" |
| "sw $0, 2316(%[dst]) \n\t" |
| "sw $0, 2320(%[dst]) \n\t" |
| "sw $0, 2324(%[dst]) \n\t" |
| "sw $0, 2328(%[dst]) \n\t" |
| "sw $0, 2332(%[dst]) \n\t" |
| "bne %[src], %[loop_end], 1b \n\t" |
| PTR_ADDIU "%[dst], %[dst], 32 \n\t" |
| ".set pop \n\t" |
| |
| : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), |
| [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), |
| [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), |
| [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), |
| [src]"+r"(buff0), [dst]"+r"(buff1) |
| : [loop_end]"r"(loop_end) |
| : "memory" |
| ); |
| ac->fdsp->vector_fmul_reverse(saved_ltp + 448, ac->buf_mdct + 960, &swindow[64], 64); |
| fmul_and_reverse(saved_ltp + 512, ac->buf_mdct + 960, swindow, 64); |
| } else { // LONG_STOP or ONLY_LONG |
| ac->fdsp->vector_fmul_reverse(saved_ltp, ac->buf_mdct + 512, &lwindow[512], 512); |
| fmul_and_reverse(saved_ltp + 512, ac->buf_mdct + 512, lwindow, 512); |
| } |
| |
| float_copy(sce->ltp_state, sce->ltp_state + 1024, 1024); |
| float_copy(sce->ltp_state + 1024, sce->ret, 1024); |
| float_copy(sce->ltp_state + 2048, saved_ltp, 1024); |
| } |
| #endif /* HAVE_MIPSFPU */ |
| #endif /* HAVE_INLINE_ASM */ |
| |
| void ff_aacdec_init_mips(AACContext *c) |
| { |
| #if HAVE_INLINE_ASM |
| c->imdct_and_windowing = imdct_and_windowing_mips; |
| c->apply_ltp = apply_ltp_mips; |
| #if HAVE_MIPSFPU |
| c->update_ltp = update_ltp_mips; |
| #endif /* HAVE_MIPSFPU */ |
| #endif /* HAVE_INLINE_ASM */ |
| } |
