Initial check in of AMR (NB and WB) decoders based on PV source code.

1 files changed, 193 insertions, 0 deletions

diff --git a/media/libstagefright/codecs/amrnb/common/src/l_abs.cpp b/media/libstagefright/codecs/amrnb/common/src/l_abs.cpp
new file mode 100644
index 0000000..fd1c90d
--- /dev/null
+++ b/media/libstagefright/codecs/amrnb/common/src/l_abs.cpp
@@ -0,0 +1,193 @@
+/* ------------------------------------------------------------------
+ * 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.
+ * -------------------------------------------------------------------
+ */
+/****************************************************************************************
+Portions of this file are derived from the following 3GPP standard:
+
+    3GPP TS 26.073
+    ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec
+    Available from http://www.3gpp.org
+
+(C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
+Permission to distribute, modify and use this file under the standard license
+terms listed above has been obtained from the copyright holder.
+****************************************************************************************/
+/*
+ Pathname: ./gsm-amr/c/src/l_abs.c
+
+------------------------------------------------------------------------------
+ REVISION HISTORY
+
+ Description: Created separate file for the L_abs function. Sync'ed up
+          with the current template and fixed tabs.
+
+ Description: Removed conditional code that updates WMOPS counter
+
+ Who:                       Date:
+ Description:
+
+------------------------------------------------------------------------------
+ INPUT AND OUTPUT DEFINITIONS
+
+ Inputs:
+    L_var1 = 32 bit long signed integer (Word32 ) whose value falls
+             in the range : 0x8000 0000 <= L_var1 <= 0x7fff ffff.
+
+ Local Stores/Buffers/Pointers Needed:
+    None
+
+ Global Stores/Buffers/Pointers Needed:
+    None
+
+ Outputs:
+    L_var1 = absolute value of input (Word32)
+
+ Pointers and Buffers Modified:
+    None
+
+ Local Stores Modified:
+    None
+
+ Global Stores Modified:
+    None
+
+------------------------------------------------------------------------------
+ FUNCTION DESCRIPTION
+
+ This function calculates the absolute value of L_var1; saturate in case
+ where the input is -214783648.
+
+------------------------------------------------------------------------------
+ REQUIREMENTS
+
+ None
+
+------------------------------------------------------------------------------
+ REFERENCES
+
+ [1] basicop2.c, ETS Version 2.0.0, February 8, 1999
+
+------------------------------------------------------------------------------
+ PSEUDO-CODE
+
+Word32 L_abs (Word32 L_var1)
+{
+    Word32 L_var_out;
+
+    if (L_var1 == MIN_32)
+    {
+        L_var_out = MAX_32;
+    }
+    else
+    {
+        if (L_var1 < 0)
+        {
+            L_var_out = -L_var1;
+        }
+        else
+        {
+            L_var_out = L_var1;
+        }
+    }
+
+#if (WMOPS)
+    multiCounter[currCounter].L_abs++;
+#endif
+    return (L_var_out);
+}
+
+
+------------------------------------------------------------------------------
+ RESOURCES USED
+   When the code is written for a specific target processor the
+     the resources used should be documented below.
+
+ STACK USAGE: [stack count for this module] + [variable to represent
+          stack usage for each subroutine called]
+
+     where: [stack usage variable] = stack usage for [subroutine
+         name] (see [filename].ext)
+
+ DATA MEMORY USED: x words
+
+ PROGRAM MEMORY USED: x words
+
+ CLOCK CYCLES: [cycle count equation for this module] + [variable
+           used to represent cycle count for each subroutine
+           called]
+
+     where: [cycle count variable] = cycle count for [subroutine
+        name] (see [filename].ext)
+
+------------------------------------------------------------------------------
+*/
+
+
+/*----------------------------------------------------------------------------
+; INCLUDES
+----------------------------------------------------------------------------*/
+#include    "basic_op.h"
+
+/*----------------------------------------------------------------------------
+; MACROS
+; Define module specific macros here
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; DEFINES
+; Include all pre-processor statements here. Include conditional
+; compile variables also.
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; 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
+----------------------------------------------------------------------------*/
+Word32 L_abs(register Word32 L_var1)
+{
+    /*----------------------------------------------------------------------------
+    ; Define all local variables
+    ----------------------------------------------------------------------------*/
+
+    /*----------------------------------------------------------------------------
+    ; Function body here
+    ----------------------------------------------------------------------------*/
+
+    Word32 y = L_var1 - (L_var1 < 0);
+    y = y ^(y >> 31);
+    return (y);
+
+}