Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 89 insertions, 0 deletions

diff --git a/media/ffvpx/libavcodec/mpegaudio_tablegen.h b/media/ffvpx/libavcodec/mpegaudio_tablegen.h
new file mode 100644
index 0000000000..bae6962ac0
--- /dev/null
+++ b/media/ffvpx/libavcodec/mpegaudio_tablegen.h
@@ -0,0 +1,89 @@
+/*
+ * Header file for hardcoded mpegaudiodec tables
+ *
+ * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
+ *
+ * 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
+ */
+
+#ifndef AVCODEC_MPEGAUDIO_TABLEGEN_H
+#define AVCODEC_MPEGAUDIO_TABLEGEN_H
+
+#include <stdint.h>
+#include <math.h>
+#include "libavutil/attributes.h"
+
+#if CONFIG_HARDCODED_TABLES
+#define mpegaudio_tableinit()
+#include "libavcodec/mpegaudio_tables.h"
+#else
+#if defined(BUILD_TABLES) || !USE_FLOATS
+#define FIXED_TABLE
+static uint32_t exp_table_fixed[512];
+static uint32_t expval_table_fixed[512][16];
+#endif
+
+#if defined(BUILD_TABLES) || USE_FLOATS
+#define FLOAT_TABLE
+static float exp_table_float[512];
+static float expval_table_float[512][16];
+#endif
+
+#define IMDCT_SCALAR 1.759
+
+static av_cold void mpegaudio_tableinit(void)
+{
+    int i, value, exponent;
+    static const double exp2_lut[4] = {
+        1.00000000000000000000, /* 2 ^ (0 * 0.25) */
+        1.18920711500272106672, /* 2 ^ (1 * 0.25) */
+        M_SQRT2               , /* 2 ^ (2 * 0.25) */
+        1.68179283050742908606, /* 2 ^ (3 * 0.25) */
+    };
+    double pow43_lut[16];
+    double exp2_base = 2.11758236813575084767080625169910490512847900390625e-22; // 2^(-72)
+    double exp2_val;
+
+    for (i = 0; i < 16; ++i)
+        pow43_lut[i] = i * cbrt(i);
+
+    for (exponent = 0; exponent < 512; exponent++) {
+        if (exponent && (exponent & 3) == 0)
+            exp2_base *= 2;
+        exp2_val = exp2_base * exp2_lut[exponent & 3] / IMDCT_SCALAR;
+        for (value = 0; value < 16; value++) {
+            double f = pow43_lut[value] * exp2_val;
+#ifdef FIXED_TABLE
+            expval_table_fixed[exponent][value] = (f < 0xFFFFFFFF ? llrint(f) : 0xFFFFFFFF);
+#endif
+#ifdef FLOAT_TABLE
+            expval_table_float[exponent][value] = f;
+#endif
+        }
+#ifdef FIXED_TABLE
+        exp_table_fixed[exponent] = expval_table_fixed[exponent][1];
+#endif
+#ifdef FLOAT_TABLE
+        exp_table_float[exponent] = expval_table_float[exponent][1];
+#endif
+    }
+}
+#undef FLOAT_TABLE
+#undef FIXED_TABLE
+#endif /* CONFIG_HARDCODED_TABLES */
+
+#endif /* AVCODEC_MPEGAUDIO_TABLEGEN_H */