Initial check in of stagefright software AAC decoder based on PV source code.

1 files changed, 200 insertions, 0 deletions

diff --git a/media/libstagefright/codecs/aacdec/dst32.cpp b/media/libstagefright/codecs/aacdec/dst32.cpp
new file mode 100644
index 0000000..5edecf1
--- /dev/null
+++ b/media/libstagefright/codecs/aacdec/dst32.cpp
@@ -0,0 +1,200 @@
+/* ------------------------------------------------------------------
+ * Copyright (C) 1998-2009 PacketVideo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ * -------------------------------------------------------------------
+ */
+/*
+
+ Filename: dst32.c
+
+------------------------------------------------------------------------------
+ REVISION HISTORY
+
+
+ Who:                                   Date: MM/DD/YYYY
+ Description:
+
+------------------------------------------------------------------------------
+ INPUT AND OUTPUT DEFINITIONS
+
+    Int32 x             32-bit integer input length 32
+
+
+------------------------------------------------------------------------------
+ FUNCTION DESCRIPTION
+
+    Implement discrete sine transform of lenght 32
+
+------------------------------------------------------------------------------
+ REQUIREMENTS
+
+
+------------------------------------------------------------------------------
+ REFERENCES
+
+------------------------------------------------------------------------------
+ PSEUDO-CODE
+
+------------------------------------------------------------------------------
+*/
+
+
+/*----------------------------------------------------------------------------
+; INCLUDES
+----------------------------------------------------------------------------*/
+
+#ifdef AAC_PLUS
+
+
+#include "dst32.h"
+#include "dst16.h"
+
+#include "fxp_mul32.h"
+
+/*----------------------------------------------------------------------------
+; MACROS
+; Define module specific macros here
+----------------------------------------------------------------------------*/
+
+
+/*----------------------------------------------------------------------------
+; DEFINES
+; Include all pre-processor statements here. Include conditional
+; compile variables also.
+----------------------------------------------------------------------------*/
+
+
+#define R_SHIFT1     29
+#define Qfmt29(x)   (Int32)(x*((Int32)1<<R_SHIFT1) + (x>=0?0.5F:-0.5F))
+#define Qfmt31(a)   (Int32)(a*0x7FFFFFFF + (a>=0?0.5F:-0.5F))
+
+const Int32 CosTable_16[14] =
+{
+    Qfmt31(0.50060299823520F),   Qfmt31(0.50547095989754F),
+    Qfmt31(0.51544730992262F),   Qfmt31(0.53104259108978F),
+    Qfmt31(0.55310389603444F),   Qfmt31(0.58293496820613F),
+    Qfmt31(0.62250412303566F),   Qfmt31(0.67480834145501F),
+    Qfmt31(0.74453627100230F),   Qfmt31(0.83934964541553F),
+    Qfmt29(0.97256823786196F),   Qfmt29(1.16943993343288F),
+    Qfmt29(1.48416461631417F),   Qfmt29(2.05778100995341F)
+};
+
+/*----------------------------------------------------------------------------
+; LOCAL FUNCTION DEFINITIONS
+; Function Prototype declaration
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; LOCAL STORE/BUFFER/POINTER DEFINITIONS
+; Variable declaration - defined here and used outside this module
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; EXTERNAL FUNCTION REFERENCES
+; Declare functions defined elsewhere and referenced in this module
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES
+; Declare variables used in this module but defined elsewhere
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; FUNCTION CODE
+----------------------------------------------------------------------------*/
+
+
+void dst_32(Int32 vec[], Int32 scratch_mem[])   /* scratch_mem size 32 */
+{
+    Int32 *temp_even = scratch_mem;
+
+    Int32 i;
+    const Int32 *pt_cos = &CosTable_16[13];
+    Int32 tmp0 = vec[31] >> 1;
+    Int32 tmp1, tmp2;
+    Int32 *pt_even = temp_even;
+    Int32 *pt_odd  = vec;
+    Int32 *pt_vec  = vec;
+    Int32 *pt_vecN_1  = vec;
+    Int32 tmp3;
+
+
+    tmp1 = 0;
+
+    for (i = 5; i != 0; i--)
+    {
+        *(pt_even++) = *(pt_vec++);
+        tmp2         = *(pt_vec++);
+        *(pt_even++) = *(pt_vec++);
+        tmp3         = *(pt_vec++);
+        *(pt_even++) = *(pt_vec++);
+        *(pt_odd++) = tmp2 + tmp1;
+        *(pt_odd++) = tmp3 + tmp2;
+        tmp1         = *(pt_vec++);
+        *(pt_odd++) = tmp1 + tmp3;
+    }
+
+    *(pt_even) = *(pt_vec++);
+    *(pt_odd)  = *(pt_vec) + tmp1;
+
+
+    dst_16(temp_even, &scratch_mem[16]);
+    dst_16(vec, &scratch_mem[24]);
+
+
+    pt_vecN_1  = &vec[16];
+
+    tmp1 = temp_even[15];
+
+    tmp3  = fxp_mul32_Q31((vec[15] - tmp0) << 3, Qfmt31(0.63687550772175F)) << 2;
+    tmp2  = temp_even[14];
+    *(pt_vecN_1++)  = tmp3 - tmp1;
+    vec[15]         = tmp3 + tmp1;
+    tmp1  = temp_even[13];
+    tmp3  = fxp_mul32_Q31((vec[14] + tmp0) << 3, Qfmt31(0.85190210461718F));
+    *(pt_vecN_1++)  = tmp3 - tmp2;
+    vec[14]         = tmp3 + tmp2;
+
+    pt_even = &temp_even[12];
+    pt_vec  = &vec[13];
+
+    for (i = 2; i != 0; i--)
+    {
+        tmp3  = fxp_mul32_Q29((*(pt_vec) - tmp0), *(pt_cos--));
+        tmp2 = *(pt_even--);
+        *(pt_vec--)     = tmp3 + tmp1;
+        *(pt_vecN_1++)  = tmp3 - tmp1;
+        tmp3  = fxp_mul32_Q29((*(pt_vec) + tmp0), *(pt_cos--));
+        tmp1 = *(pt_even--);
+        *(pt_vec--)     = tmp3 + tmp2;
+        *(pt_vecN_1++)  = tmp3 - tmp2;
+    }
+
+    for (i = 5; i != 0; i--)
+    {
+        tmp3  = fxp_mul32_Q31((*(pt_vec) - tmp0) << 1, *(pt_cos--));
+        tmp2 = *(pt_even--);
+        *(pt_vec--)     = tmp3 + tmp1;
+        *(pt_vecN_1++)  = tmp3 - tmp1;
+        tmp3  = fxp_mul32_Q31((*(pt_vec) + tmp0) << 1, *(pt_cos--));
+        tmp1 = *(pt_even--);
+        *(pt_vec--)     = tmp3 + tmp2;
+        *(pt_vecN_1++)  = tmp3 - tmp2;
+    }
+
+
+}
+
+#endif