diff options
Diffstat (limited to 'libavcodec/mips/aacdec_mips.c')
-rw-r--r-- | libavcodec/mips/aacdec_mips.c | 442 |
1 files changed, 442 insertions, 0 deletions
diff --git a/libavcodec/mips/aacdec_mips.c b/libavcodec/mips/aacdec_mips.c new file mode 100644 index 0000000..253cdeb --- /dev/null +++ b/libavcodec/mips/aacdec_mips.c @@ -0,0 +1,442 @@ +/* + * 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 */ +} |