avcodec: Template creation for AAC decoder (SBR-module)

Move the existing code to a new template file.

Signed-off-by: Nedeljko Babic <nedeljko.babic@imgtec.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/aacsbr.h

@@ -33,6 +33,51 @@
 #include "aac.h"
 #include "sbr.h"
 
+#define ENVELOPE_ADJUSTMENT_OFFSET 2
+#define NOISE_FLOOR_OFFSET FIXR(6.0f)
+
+/**
+ * SBR VLC tables
+ */
+enum {
+    T_HUFFMAN_ENV_1_5DB,
+    F_HUFFMAN_ENV_1_5DB,
+    T_HUFFMAN_ENV_BAL_1_5DB,
+    F_HUFFMAN_ENV_BAL_1_5DB,
+    T_HUFFMAN_ENV_3_0DB,
+    F_HUFFMAN_ENV_3_0DB,
+    T_HUFFMAN_ENV_BAL_3_0DB,
+    F_HUFFMAN_ENV_BAL_3_0DB,
+    T_HUFFMAN_NOISE_3_0DB,
+    T_HUFFMAN_NOISE_BAL_3_0DB,
+};
+
+/**
+ * bs_frame_class - frame class of current SBR frame (14496-3 sp04 p98)
+ */
+enum {
+    FIXFIX,
+    FIXVAR,
+    VARFIX,
+    VARVAR,
+};
+
+enum {
+    EXTENSION_ID_PS = 2,
+};
+
+static const int8_t vlc_sbr_lav[10] =
+    { 60, 60, 24, 24, 31, 31, 12, 12, 31, 12 };
+
+#define SBR_INIT_VLC_STATIC(num, size) \
+    INIT_VLC_STATIC(&vlc_sbr[num], 9, sbr_tmp[num].table_size / sbr_tmp[num].elem_size,     \
+                    sbr_tmp[num].sbr_bits ,                      1,                      1, \
+                    sbr_tmp[num].sbr_codes, sbr_tmp[num].elem_size, sbr_tmp[num].elem_size, \
+                    size)
+
+#define SBR_VLC_ROW(name) \
+    { name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) }
+
 /** Initialize SBR. */
 void ff_aac_sbr_init(void);
 /** Initialize one SBR context. */

libavcodec/sbrdsp.c

@@ -25,15 +25,6 @@
 #include "libavutil/intfloat.h"
 #include "sbrdsp.h"
 
-static void sbr_sum64x5_c(float *z)
-{
-    int k;
-    for (k = 0; k < 64; k++) {
-        float f = z[k] + z[k + 64] + z[k + 128] + z[k + 192] + z[k + 256];
-        z[k] = f;
-    }
-}
-
 static float sbr_sum_square_c(float (*x)[2], int n)
 {
     float sum0 = 0.0f, sum1 = 0.0f;
@@ -101,16 +92,6 @@ static void sbr_qmf_deint_neg_c(float *v, const float *src)
     }
 }
 
-static void sbr_qmf_deint_bfly_c(float *v, const float *src0, const float *src1)
-{
-    int i;
-    for (i = 0; i < 64; i++) {
-        v[      i] = src0[i] - src1[63 - i];
-        v[127 - i] = src0[i] + src1[63 - i];
-    }
-}
-
-
 #if 0
     /* This code is slower because it multiplies memory accesses.
      * It is left for educational purposes and because it may offer
@@ -238,58 +219,4 @@ static av_always_inline void sbr_hf_apply_noise(float (*Y)[2],
     }
 }
 
-static void sbr_hf_apply_noise_0(float (*Y)[2], const float *s_m,
+#include "sbrdsp_template.c"
-                                 const float *q_filt, int noise,
-                                 int kx, int m_max)
-{
-    sbr_hf_apply_noise(Y, s_m, q_filt, noise, 1.0, 0.0, m_max);
-}
-
-static void sbr_hf_apply_noise_1(float (*Y)[2], const float *s_m,
-                                 const float *q_filt, int noise,
-                                 int kx, int m_max)
-{
-    float phi_sign = 1 - 2 * (kx & 1);
-    sbr_hf_apply_noise(Y, s_m, q_filt, noise, 0.0, phi_sign, m_max);
-}
-
-static void sbr_hf_apply_noise_2(float (*Y)[2], const float *s_m,
-                                 const float *q_filt, int noise,
-                                 int kx, int m_max)
-{
-    sbr_hf_apply_noise(Y, s_m, q_filt, noise, -1.0, 0.0, m_max);
-}
-
-static void sbr_hf_apply_noise_3(float (*Y)[2], const float *s_m,
-                                 const float *q_filt, int noise,
-                                 int kx, int m_max)
-{
-    float phi_sign = 1 - 2 * (kx & 1);
-    sbr_hf_apply_noise(Y, s_m, q_filt, noise, 0.0, -phi_sign, m_max);
-}
-
-av_cold void ff_sbrdsp_init(SBRDSPContext *s)
-{
-    s->sum64x5 = sbr_sum64x5_c;
-    s->sum_square = sbr_sum_square_c;
-    s->neg_odd_64 = sbr_neg_odd_64_c;
-    s->qmf_pre_shuffle = sbr_qmf_pre_shuffle_c;
-    s->qmf_post_shuffle = sbr_qmf_post_shuffle_c;
-    s->qmf_deint_neg = sbr_qmf_deint_neg_c;
-    s->qmf_deint_bfly = sbr_qmf_deint_bfly_c;
-    s->autocorrelate = sbr_autocorrelate_c;
-    s->hf_gen = sbr_hf_gen_c;
-    s->hf_g_filt = sbr_hf_g_filt_c;
-
-    s->hf_apply_noise[0] = sbr_hf_apply_noise_0;
-    s->hf_apply_noise[1] = sbr_hf_apply_noise_1;
-    s->hf_apply_noise[2] = sbr_hf_apply_noise_2;
-    s->hf_apply_noise[3] = sbr_hf_apply_noise_3;
-
-    if (ARCH_ARM)
-        ff_sbrdsp_init_arm(s);
-    if (ARCH_X86)
-        ff_sbrdsp_init_x86(s);
-    if (ARCH_MIPS)
-        ff_sbrdsp_init_mips(s);
-}

libavcodec/sbrdsp_template.c

@@ -0,0 +1,95 @@
+/*
+ * AAC Spectral Band Replication decoding functions
+ * Copyright (c) 2008-2009 Robert Swain ( rob opendot cl )
+ * Copyright (c) 2009-2010 Alex Converse <alex.converse@gmail.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
+ */
+
+static void sbr_sum64x5_c(float *z)
+{
+    int k;
+    for (k = 0; k < 64; k++) {
+        float f = z[k] + z[k + 64] + z[k + 128] + z[k + 192] + z[k + 256];
+        z[k] = f;
+    }
+}
+
+static void sbr_qmf_deint_bfly_c(float *v, const float *src0, const float *src1)
+{
+    int i;
+    for (i = 0; i < 64; i++) {
+        v[      i] = src0[i] - src1[63 - i];
+        v[127 - i] = src0[i] + src1[63 - i];
+    }
+}
+
+static void sbr_hf_apply_noise_0(float (*Y)[2], const float *s_m,
+                                 const float *q_filt, int noise,
+                                 int kx, int m_max)
+{
+    sbr_hf_apply_noise(Y, s_m, q_filt, noise, 1.0, 0.0, m_max);
+}
+
+static void sbr_hf_apply_noise_1(float (*Y)[2], const float *s_m,
+                                 const float *q_filt, int noise,
+                                 int kx, int m_max)
+{
+    float phi_sign = 1 - 2 * (kx & 1);
+    sbr_hf_apply_noise(Y, s_m, q_filt, noise, 0.0, phi_sign, m_max);
+}
+
+static void sbr_hf_apply_noise_2(float (*Y)[2], const float *s_m,
+                                 const float *q_filt, int noise,
+                                 int kx, int m_max)
+{
+    sbr_hf_apply_noise(Y, s_m, q_filt, noise, -1.0, 0.0, m_max);
+}
+
+static void sbr_hf_apply_noise_3(float (*Y)[2], const float *s_m,
+                                 const float *q_filt, int noise,
+                                 int kx, int m_max)
+{
+    float phi_sign = 1 - 2 * (kx & 1);
+    sbr_hf_apply_noise(Y, s_m, q_filt, noise, 0.0, -phi_sign, m_max);
+}
+
+av_cold void ff_sbrdsp_init(SBRDSPContext *s)
+{
+    s->sum64x5 = sbr_sum64x5_c;
+    s->sum_square = sbr_sum_square_c;
+    s->neg_odd_64 = sbr_neg_odd_64_c;
+    s->qmf_pre_shuffle = sbr_qmf_pre_shuffle_c;
+    s->qmf_post_shuffle = sbr_qmf_post_shuffle_c;
+    s->qmf_deint_neg = sbr_qmf_deint_neg_c;
+    s->qmf_deint_bfly = sbr_qmf_deint_bfly_c;
+    s->autocorrelate = sbr_autocorrelate_c;
+    s->hf_gen = sbr_hf_gen_c;
+    s->hf_g_filt = sbr_hf_g_filt_c;
+
+    s->hf_apply_noise[0] = sbr_hf_apply_noise_0;
+    s->hf_apply_noise[1] = sbr_hf_apply_noise_1;
+    s->hf_apply_noise[2] = sbr_hf_apply_noise_2;
+    s->hf_apply_noise[3] = sbr_hf_apply_noise_3;
+
+    if (ARCH_ARM)
+        ff_sbrdsp_init_arm(s);
+    if (ARCH_X86)
+        ff_sbrdsp_init_x86(s);
+    if (ARCH_MIPS)
+        ff_sbrdsp_init_mips(s);
+}