aacsbr: move some simdable loops to function pointers

This prepares for assembly optimisations by moving the most
time-consuming loops to functions called through pointers
in a new context.

Signed-off-by: Mans Rullgard <mans@mansr.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/libavcodec/sbrdsp.h b/libavcodec/sbrdsp.h
new file mode 100644
index 0000000000..2f6cf1e4c5
--- /dev/null
+++ b/libavcodec/sbrdsp.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2012 Mans Rullgard
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef LIBAVCODEC_SBRDSP_H
+#define LIBAVCODEC_SBRDSP_H
+
+typedef struct SBRDSPContext {
+    void (*sum64x5)(float *z);
+    float (*sum_square)(float (*x)[2], int n);
+    void (*neg_odd_64)(float *x);
+    void (*qmf_pre_shuffle)(float *z);
+    void (*qmf_post_shuffle)(float W[32][2], const float *z);
+    void (*qmf_deint_neg)(float *v, const float *src);
+    void (*qmf_deint_bfly)(float *v, const float *src0, const float *src1);
+    void (*autocorrelate)(const float x[40][2], float phi[3][2][2]);
+    void (*hf_gen)(float (*X_high)[2], const float (*X_low)[2],
+                   const float alpha0[2], const float alpha1[2],
+                   float bw, int start, int end);
+    void (*hf_g_filt)(float (*Y)[2], const float (*X_high)[40][2],
+                      const float *g_filt, int m_max, int ixh);
+    void (*hf_apply_noise[4])(float (*Y)[2], const float *s_m,
+                              const float *q_filt, int noise,
+                              int kx, int m_max);
+} SBRDSPContext;
+
+extern const float ff_sbr_noise_table[][2];
+
+void ff_sbrdsp_init(SBRDSPContext *s);
+
+#endif