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-rw-r--r--media/ffvpx/libavcodec/mpegaudiodsp_template.c372
1 files changed, 372 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/mpegaudiodsp_template.c b/media/ffvpx/libavcodec/mpegaudiodsp_template.c
new file mode 100644
index 0000000000..fbbd94e486
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+++ b/media/ffvpx/libavcodec/mpegaudiodsp_template.c
@@ -0,0 +1,372 @@
+/*
+ * Copyright (c) 2001, 2002 Fabrice Bellard
+ *
+ * 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
+ */
+
+#include <stdint.h>
+
+#include "libavutil/attributes.h"
+#include "libavutil/mem_internal.h"
+#include "libavutil/thread.h"
+
+#include "dct32.h"
+#include "mathops.h"
+#include "mpegaudiodsp.h"
+#include "mpegaudio.h"
+
+#if USE_FLOATS
+#define RENAME(n) n##_float
+
+static inline float round_sample(float *sum)
+{
+ float sum1=*sum;
+ *sum = 0;
+ return sum1;
+}
+
+#define MACS(rt, ra, rb) rt+=(ra)*(rb)
+#define MULS(ra, rb) ((ra)*(rb))
+#define MULH3(x, y, s) ((s)*(y)*(x))
+#define MLSS(rt, ra, rb) rt-=(ra)*(rb)
+#define MULLx(x, y, s) ((y)*(x))
+#define FIXHR(x) ((float)(x))
+#define FIXR(x) ((float)(x))
+#define SHR(a,b) ((a)*(1.0f/(1<<(b))))
+
+#else
+
+#define RENAME(n) n##_fixed
+#define OUT_SHIFT (WFRAC_BITS + FRAC_BITS - 15)
+
+static inline int round_sample(int64_t *sum)
+{
+ int sum1;
+ sum1 = (int)((*sum) >> OUT_SHIFT);
+ *sum &= (1<<OUT_SHIFT)-1;
+ return av_clip_int16(sum1);
+}
+
+# define MULS(ra, rb) MUL64(ra, rb)
+# define MACS(rt, ra, rb) MAC64(rt, ra, rb)
+# define MLSS(rt, ra, rb) MLS64(rt, ra, rb)
+# define MULH3(x, y, s) MULH((s)*(x), y)
+# define MULLx(x, y, s) MULL((int)(x),(y),s)
+# define SHR(a,b) (((int)(a))>>(b))
+# define FIXR(a) ((int)((a) * FRAC_ONE + 0.5))
+# define FIXHR(a) ((int)((a) * (1LL<<32) + 0.5))
+#endif
+
+/** Window for MDCT. Actually only the elements in [0,17] and
+ [MDCT_BUF_SIZE/2, MDCT_BUF_SIZE/2 + 17] are actually used. The rest
+ is just to preserve alignment for SIMD implementations.
+*/
+DECLARE_ALIGNED(16, INTFLOAT, RENAME(ff_mdct_win))[8][MDCT_BUF_SIZE];
+
+DECLARE_ALIGNED(16, MPA_INT, RENAME(ff_mpa_synth_window))[512+256];
+
+#define SUM8(op, sum, w, p) \
+{ \
+ op(sum, (w)[0 * 64], (p)[0 * 64]); \
+ op(sum, (w)[1 * 64], (p)[1 * 64]); \
+ op(sum, (w)[2 * 64], (p)[2 * 64]); \
+ op(sum, (w)[3 * 64], (p)[3 * 64]); \
+ op(sum, (w)[4 * 64], (p)[4 * 64]); \
+ op(sum, (w)[5 * 64], (p)[5 * 64]); \
+ op(sum, (w)[6 * 64], (p)[6 * 64]); \
+ op(sum, (w)[7 * 64], (p)[7 * 64]); \
+}
+
+#define SUM8P2(sum1, op1, sum2, op2, w1, w2, p) \
+{ \
+ INTFLOAT tmp;\
+ tmp = p[0 * 64];\
+ op1(sum1, (w1)[0 * 64], tmp);\
+ op2(sum2, (w2)[0 * 64], tmp);\
+ tmp = p[1 * 64];\
+ op1(sum1, (w1)[1 * 64], tmp);\
+ op2(sum2, (w2)[1 * 64], tmp);\
+ tmp = p[2 * 64];\
+ op1(sum1, (w1)[2 * 64], tmp);\
+ op2(sum2, (w2)[2 * 64], tmp);\
+ tmp = p[3 * 64];\
+ op1(sum1, (w1)[3 * 64], tmp);\
+ op2(sum2, (w2)[3 * 64], tmp);\
+ tmp = p[4 * 64];\
+ op1(sum1, (w1)[4 * 64], tmp);\
+ op2(sum2, (w2)[4 * 64], tmp);\
+ tmp = p[5 * 64];\
+ op1(sum1, (w1)[5 * 64], tmp);\
+ op2(sum2, (w2)[5 * 64], tmp);\
+ tmp = p[6 * 64];\
+ op1(sum1, (w1)[6 * 64], tmp);\
+ op2(sum2, (w2)[6 * 64], tmp);\
+ tmp = p[7 * 64];\
+ op1(sum1, (w1)[7 * 64], tmp);\
+ op2(sum2, (w2)[7 * 64], tmp);\
+}
+
+void RENAME(ff_mpadsp_apply_window)(MPA_INT *synth_buf, MPA_INT *window,
+ int *dither_state, OUT_INT *samples,
+ ptrdiff_t incr)
+{
+ register const MPA_INT *w, *w2, *p;
+ int j;
+ OUT_INT *samples2;
+#if USE_FLOATS
+ float sum, sum2;
+#else
+ int64_t sum, sum2;
+#endif
+
+ /* copy to avoid wrap */
+ memcpy(synth_buf + 512, synth_buf, 32 * sizeof(*synth_buf));
+
+ samples2 = samples + 31 * incr;
+ w = window;
+ w2 = window + 31;
+
+ sum = *dither_state;
+ p = synth_buf + 16;
+ SUM8(MACS, sum, w, p);
+ p = synth_buf + 48;
+ SUM8(MLSS, sum, w + 32, p);
+ *samples = round_sample(&sum);
+ samples += incr;
+ w++;
+
+ /* we calculate two samples at the same time to avoid one memory
+ access per two sample */
+ for(j=1;j<16;j++) {
+ sum2 = 0;
+ p = synth_buf + 16 + j;
+ SUM8P2(sum, MACS, sum2, MLSS, w, w2, p);
+ p = synth_buf + 48 - j;
+ SUM8P2(sum, MLSS, sum2, MLSS, w + 32, w2 + 32, p);
+
+ *samples = round_sample(&sum);
+ samples += incr;
+ sum += sum2;
+ *samples2 = round_sample(&sum);
+ samples2 -= incr;
+ w++;
+ w2--;
+ }
+
+ p = synth_buf + 32;
+ SUM8(MLSS, sum, w + 32, p);
+ *samples = round_sample(&sum);
+ *dither_state= sum;
+}
+
+/* 32 sub band synthesis filter. Input: 32 sub band samples, Output:
+ 32 samples. */
+void RENAME(ff_mpa_synth_filter)(MPADSPContext *s, MPA_INT *synth_buf_ptr,
+ int *synth_buf_offset,
+ MPA_INT *window, int *dither_state,
+ OUT_INT *samples, ptrdiff_t incr,
+ MPA_INT *sb_samples)
+{
+ MPA_INT *synth_buf;
+ int offset;
+
+ offset = *synth_buf_offset;
+ synth_buf = synth_buf_ptr + offset;
+
+ s->RENAME(dct32)(synth_buf, sb_samples);
+ s->RENAME(apply_window)(synth_buf, window, dither_state, samples, incr);
+
+ offset = (offset - 32) & 511;
+ *synth_buf_offset = offset;
+}
+
+static av_cold void mpa_synth_init(MPA_INT *window)
+{
+ int i, j;
+
+ /* max = 18760, max sum over all 16 coefs : 44736 */
+ for(i=0;i<257;i++) {
+ INTFLOAT v;
+ v = ff_mpa_enwindow[i];
+#if USE_FLOATS
+ v *= 1.0 / (1LL<<(16 + FRAC_BITS));
+#endif
+ window[i] = v;
+ if ((i & 63) != 0)
+ v = -v;
+ if (i != 0)
+ window[512 - i] = v;
+ }
+
+
+ // Needed for avoiding shuffles in ASM implementations
+ for(i=0; i < 8; i++)
+ for(j=0; j < 16; j++)
+ window[512+16*i+j] = window[64*i+32-j];
+
+ for(i=0; i < 8; i++)
+ for(j=0; j < 16; j++)
+ window[512+128+16*i+j] = window[64*i+48-j];
+}
+
+static av_cold void mpa_synth_window_init(void)
+{
+ mpa_synth_init(RENAME(ff_mpa_synth_window));
+}
+
+av_cold void RENAME(ff_mpa_synth_init)(void)
+{
+ static AVOnce init_static_once = AV_ONCE_INIT;
+ ff_thread_once(&init_static_once, mpa_synth_window_init);
+}
+
+/* cos(pi*i/18) */
+#define C1 FIXHR(0.98480775301220805936/2)
+#define C2 FIXHR(0.93969262078590838405/2)
+#define C3 FIXHR(0.86602540378443864676/2)
+#define C4 FIXHR(0.76604444311897803520/2)
+#define C5 FIXHR(0.64278760968653932632/2)
+#define C6 FIXHR(0.5/2)
+#define C7 FIXHR(0.34202014332566873304/2)
+#define C8 FIXHR(0.17364817766693034885/2)
+
+/* 0.5 / cos(pi*(2*i+1)/36) */
+static const INTFLOAT icos36[9] = {
+ FIXR(0.50190991877167369479),
+ FIXR(0.51763809020504152469), //0
+ FIXR(0.55168895948124587824),
+ FIXR(0.61038729438072803416),
+ FIXR(0.70710678118654752439), //1
+ FIXR(0.87172339781054900991),
+ FIXR(1.18310079157624925896),
+ FIXR(1.93185165257813657349), //2
+ FIXR(5.73685662283492756461),
+};
+
+/* 0.5 / cos(pi*(2*i+1)/36) */
+static const INTFLOAT icos36h[9] = {
+ FIXHR(0.50190991877167369479/2),
+ FIXHR(0.51763809020504152469/2), //0
+ FIXHR(0.55168895948124587824/2),
+ FIXHR(0.61038729438072803416/2),
+ FIXHR(0.70710678118654752439/2), //1
+ FIXHR(0.87172339781054900991/2),
+ FIXHR(1.18310079157624925896/4),
+ FIXHR(1.93185165257813657349/4), //2
+// FIXHR(5.73685662283492756461),
+};
+
+/* using Lee like decomposition followed by hand coded 9 points DCT */
+static void imdct36(INTFLOAT *out, INTFLOAT *buf, SUINTFLOAT *in, INTFLOAT *win)
+{
+ int i, j;
+ SUINTFLOAT t0, t1, t2, t3, s0, s1, s2, s3;
+ SUINTFLOAT tmp[18], *tmp1, *in1;
+
+ for (i = 17; i >= 1; i--)
+ in[i] += in[i-1];
+ for (i = 17; i >= 3; i -= 2)
+ in[i] += in[i-2];
+
+ for (j = 0; j < 2; j++) {
+ tmp1 = tmp + j;
+ in1 = in + j;
+
+ t2 = in1[2*4] + in1[2*8] - in1[2*2];
+
+ t3 = in1[2*0] + SHR(in1[2*6],1);
+ t1 = in1[2*0] - in1[2*6];
+ tmp1[ 6] = t1 - SHR(t2,1);
+ tmp1[16] = t1 + t2;
+
+ t0 = MULH3(in1[2*2] + in1[2*4] , C2, 2);
+ t1 = MULH3(in1[2*4] - in1[2*8] , -2*C8, 1);
+ t2 = MULH3(in1[2*2] + in1[2*8] , -C4, 2);
+
+ tmp1[10] = t3 - t0 - t2;
+ tmp1[ 2] = t3 + t0 + t1;
+ tmp1[14] = t3 + t2 - t1;
+
+ tmp1[ 4] = MULH3(in1[2*5] + in1[2*7] - in1[2*1], -C3, 2);
+ t2 = MULH3(in1[2*1] + in1[2*5], C1, 2);
+ t3 = MULH3(in1[2*5] - in1[2*7], -2*C7, 1);
+ t0 = MULH3(in1[2*3], C3, 2);
+
+ t1 = MULH3(in1[2*1] + in1[2*7], -C5, 2);
+
+ tmp1[ 0] = t2 + t3 + t0;
+ tmp1[12] = t2 + t1 - t0;
+ tmp1[ 8] = t3 - t1 - t0;
+ }
+
+ i = 0;
+ for (j = 0; j < 4; j++) {
+ t0 = tmp[i];
+ t1 = tmp[i + 2];
+ s0 = t1 + t0;
+ s2 = t1 - t0;
+
+ t2 = tmp[i + 1];
+ t3 = tmp[i + 3];
+ s1 = MULH3(t3 + t2, icos36h[ j], 2);
+ s3 = MULLx(t3 - t2, icos36 [8 - j], FRAC_BITS);
+
+ t0 = s0 + s1;
+ t1 = s0 - s1;
+ out[(9 + j) * SBLIMIT] = MULH3(t1, win[ 9 + j], 1) + buf[4*(9 + j)];
+ out[(8 - j) * SBLIMIT] = MULH3(t1, win[ 8 - j], 1) + buf[4*(8 - j)];
+ buf[4 * ( 9 + j )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 9 + j], 1);
+ buf[4 * ( 8 - j )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 8 - j], 1);
+
+ t0 = s2 + s3;
+ t1 = s2 - s3;
+ out[(9 + 8 - j) * SBLIMIT] = MULH3(t1, win[ 9 + 8 - j], 1) + buf[4*(9 + 8 - j)];
+ out[ j * SBLIMIT] = MULH3(t1, win[ j], 1) + buf[4*( j)];
+ buf[4 * ( 9 + 8 - j )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 9 + 8 - j], 1);
+ buf[4 * ( j )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + j], 1);
+ i += 4;
+ }
+
+ s0 = tmp[16];
+ s1 = MULH3(tmp[17], icos36h[4], 2);
+ t0 = s0 + s1;
+ t1 = s0 - s1;
+ out[(9 + 4) * SBLIMIT] = MULH3(t1, win[ 9 + 4], 1) + buf[4*(9 + 4)];
+ out[(8 - 4) * SBLIMIT] = MULH3(t1, win[ 8 - 4], 1) + buf[4*(8 - 4)];
+ buf[4 * ( 9 + 4 )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 9 + 4], 1);
+ buf[4 * ( 8 - 4 )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 8 - 4], 1);
+}
+
+void RENAME(ff_imdct36_blocks)(INTFLOAT *out, INTFLOAT *buf, INTFLOAT *in,
+ int count, int switch_point, int block_type)
+{
+ int j;
+ for (j=0 ; j < count; j++) {
+ /* apply window & overlap with previous buffer */
+
+ /* select window */
+ int win_idx = (switch_point && j < 2) ? 0 : block_type;
+ INTFLOAT *win = RENAME(ff_mdct_win)[win_idx + (4 & -(j & 1))];
+
+ imdct36(out, buf, in, win);
+
+ in += 18;
+ buf += ((j&3) != 3 ? 1 : (72-3));
+ out++;
+ }
+}
+