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

1 files changed, 294 insertions, 0 deletions

diff --git a/media/libstagefright/codecs/aacdec/mdst.cpp b/media/libstagefright/codecs/aacdec/mdst.cpp
new file mode 100644
index 0000000..19f82e3
--- /dev/null
+++ b/media/libstagefright/codecs/aacdec/mdst.cpp
@@ -0,0 +1,294 @@
+/* ------------------------------------------------------------------
+ * 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: mdst.c
+
+------------------------------------------------------------------------------
+ REVISION HISTORY
+
+
+ Who:                                   Date: MM/DD/YYYY
+ Description:
+
+------------------------------------------------------------------------------
+ INPUT AND OUTPUT DEFINITIONS
+
+    Int32 x             32-bit integer input length 64
+
+
+------------------------------------------------------------------------------
+ FUNCTION DESCRIPTION
+
+    mdst
+
+------------------------------------------------------------------------------
+ REQUIREMENTS
+
+
+------------------------------------------------------------------------------
+ REFERENCES
+
+------------------------------------------------------------------------------
+ PSEUDO-CODE
+
+------------------------------------------------------------------------------
+*/
+
+
+/*----------------------------------------------------------------------------
+; INCLUDES
+----------------------------------------------------------------------------*/
+
+#ifdef AAC_PLUS
+
+#include "pv_audio_type_defs.h"
+#include "synthesis_sub_band.h"
+#include "dct16.h"
+#include "dct64.h"
+#include "mdst.h"
+
+#ifdef HQ_SBR
+
+
+/*----------------------------------------------------------------------------
+; MACROS
+; Define module specific macros here
+----------------------------------------------------------------------------*/
+
+
+/*----------------------------------------------------------------------------
+; DEFINES
+; Include all pre-processor statements here. Include conditional
+; compile variables also.
+----------------------------------------------------------------------------*/
+
+#include "fxp_mul32.h"
+#include "dst32.h"
+
+
+#define Qfmt1(a)   (Int32)(a*0x7FFFFFFF + (a>=0?0.5F:-0.5F))
+#define Qfmt(a)   (Int32)(a*((Int32)1<<27) + (a>=0?0.5F:-0.5F))
+
+const Int32 CosTable_32[32] =
+{
+    Qfmt1(0.50015063602065F),  Qfmt1(0.50135845244641F),
+    Qfmt1(0.50378872568104F),  Qfmt1(0.50747117207256F),
+    Qfmt1(0.51245147940822F),  Qfmt1(0.51879271310533F),
+    Qfmt1(0.52657731515427F),  Qfmt1(0.53590981690799F),
+    Qfmt1(0.54692043798551F),  Qfmt1(0.55976981294708F),
+    Qfmt1(0.57465518403266F),  Qfmt1(0.59181853585742F),
+    Qfmt1(0.61155734788251F),  Qfmt1(0.63423893668840F),
+    Qfmt1(0.66031980781371F),  Qfmt1(0.69037212820021F),
+    Qfmt1(0.72512052237720F),  Qfmt1(0.76549416497309F),
+    Qfmt1(0.81270209081449F),  Qfmt1(0.86834471522335F),
+    Qfmt(0.93458359703641F),  Qfmt(1.01440826499705F),
+    Qfmt(1.11207162057972F),  Qfmt(1.23383273797657F),
+    Qfmt(1.38929395863283F),  Qfmt(1.59397228338563F),
+    Qfmt(1.87467598000841F),  Qfmt(2.28205006800516F),
+    Qfmt(2.92462842815822F),  Qfmt(4.08461107812925F),
+    Qfmt(6.79675071167363F),  Qfmt(10.18693908361573F)
+};
+
+
+
+/*----------------------------------------------------------------------------
+; 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
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; mdst_32
+----------------------------------------------------------------------------*/
+
+void mdst_32(Int32 vec[], Int32 scratch_mem[])
+{
+
+    Int i;
+    const Int32 *pt_cos = CosTable_32;
+    Int32 *pt_vec = vec;
+    Int32 tmp1;
+    Int32 tmp2;
+
+
+
+    Int32 tmp3;
+
+    tmp3 = *(pt_vec++);
+    tmp2 = *(pt_vec);
+
+    for (i = 5; i != 0; i--)
+    {
+        *(pt_vec++)  += tmp3;
+        tmp1 = *(pt_vec);
+        *(pt_vec++)  += tmp2;
+        tmp3 = *(pt_vec);
+        *(pt_vec++)  += tmp1;
+        tmp2 = *(pt_vec);
+        *(pt_vec++)  += tmp3;
+        tmp1 = *(pt_vec);
+        *(pt_vec++)  += tmp2;
+        tmp3 = *(pt_vec);
+        *(pt_vec++)  += tmp1;
+        tmp2 = *(pt_vec);
+    }
+
+    *(pt_vec)  += tmp3;
+
+    dst_32(vec, scratch_mem);
+
+    pt_vec = vec;
+
+    for (i = 5; i != 0; i--)
+    {
+        *(pt_vec)   = fxp_mul32_Q31((*(pt_vec) << 1) + tmp2, *(pt_cos++));
+        pt_vec++;
+        *(pt_vec)   = fxp_mul32_Q31((*(pt_vec) << 1) - tmp2, *(pt_cos++));
+        pt_vec++;
+        *(pt_vec)   = fxp_mul32_Q31((*(pt_vec) << 1) + tmp2, *(pt_cos++));
+        pt_vec++;
+        *(pt_vec)   = fxp_mul32_Q31((*(pt_vec) << 1) - tmp2, *(pt_cos++));
+        pt_vec++;
+    }
+
+    tmp2 >>= 1;
+    for (i = 3; i != 0; i--)
+    {
+        *(pt_vec)   = fxp_mul32_Q27((*(pt_vec) + tmp2), *(pt_cos++));
+        pt_vec++;
+        *(pt_vec)   = fxp_mul32_Q27((*(pt_vec) - tmp2), *(pt_cos++));
+        pt_vec++;
+        *(pt_vec)   = fxp_mul32_Q27((*(pt_vec) + tmp2), *(pt_cos++));
+        pt_vec++;
+        *(pt_vec)   = fxp_mul32_Q27((*(pt_vec) - tmp2), *(pt_cos++));
+        pt_vec++;
+    }
+
+    *(pt_vec - 1)   <<= 1;
+
+}
+
+
+
+/*----------------------------------------------------------------------------
+; mdct_32
+----------------------------------------------------------------------------*/
+
+void mdct_32(Int32 vec[])
+{
+    Int i;
+    Int32 *pt_vec  = vec;
+    Int32 tmp1, tmp2;
+
+
+    const Int32 *pt_CosTable = CosTable_32;
+
+
+    for (i = 5; i != 0; i--)
+    {
+        *(pt_vec) = fxp_mul32_Q31(*(pt_vec) << 1, *(pt_CosTable++));
+        pt_vec++;
+        *(pt_vec) = fxp_mul32_Q31(*(pt_vec) << 1, *(pt_CosTable++));
+        pt_vec++;
+        *(pt_vec) = fxp_mul32_Q31(*(pt_vec) << 1, *(pt_CosTable++));
+        pt_vec++;
+        *(pt_vec) = fxp_mul32_Q31(*(pt_vec) << 1, *(pt_CosTable++));
+        pt_vec++;
+    }
+    for (i = 3; i != 0; i--)
+    {
+        *(pt_vec) = fxp_mul32_Q27(*(pt_vec), *(pt_CosTable++));
+        pt_vec++;
+        *(pt_vec) = fxp_mul32_Q27(*(pt_vec), *(pt_CosTable++));
+        pt_vec++;
+        *(pt_vec) = fxp_mul32_Q27(*(pt_vec), *(pt_CosTable++));
+        pt_vec++;
+        *(pt_vec) = fxp_mul32_Q27(*(pt_vec), *(pt_CosTable++));
+        pt_vec++;
+    }
+    *(pt_vec - 1)   <<= 1;
+
+
+    dct_32(vec);
+
+
+    pt_vec  = &vec[31];
+
+    tmp1 = *(pt_vec--);
+
+    for (i = 5; i != 0; i--)
+    {
+        tmp2 = *(pt_vec);
+        *(pt_vec--)  += tmp1;
+        tmp1 = *(pt_vec);
+        *(pt_vec--)  += tmp2;
+        tmp2 = *(pt_vec);
+        *(pt_vec--)  += tmp1;
+        tmp1 = *(pt_vec);
+        *(pt_vec--)  += tmp2;
+        tmp2 = *(pt_vec);
+        *(pt_vec--)  += tmp1;
+        tmp1 = *(pt_vec);
+        *(pt_vec--)  += tmp2;
+    }
+
+    *(pt_vec)  += tmp1;
+
+}
+
+#endif /*  HQ_SBR  */
+
+
+/*----------------------------------------------------------------------------
+; dct_32
+----------------------------------------------------------------------------*/
+
+
+void dct_32(Int32 vec[])
+{
+
+    pv_split(&vec[16]);
+
+    dct_16(&vec[16], 0);
+    dct_16(vec, 1);     // Even terms
+
+    pv_merge_in_place_N32(vec);
+}
+
+#endif  /* AAC_PLUS */
+
+