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

1 files changed, 190 insertions, 0 deletions

diff --git a/media/libstagefright/codecs/aacdec/get_sbr_stopfreq.cpp b/media/libstagefright/codecs/aacdec/get_sbr_stopfreq.cpp
new file mode 100644
index 0000000..e32c61d
--- /dev/null
+++ b/media/libstagefright/codecs/aacdec/get_sbr_stopfreq.cpp
@@ -0,0 +1,190 @@
+/* ------------------------------------------------------------------
+ * 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: get_sbr_stopfreq.c
+
+------------------------------------------------------------------------------
+ REVISION HISTORY
+
+
+ Who:                                   Date: MM/DD/YYYY
+ Description:
+
+------------------------------------------------------------------------------
+ INPUT AND OUTPUT DEFINITIONS
+
+
+
+------------------------------------------------------------------------------
+ FUNCTION DESCRIPTION
+
+
+------------------------------------------------------------------------------
+ REQUIREMENTS
+
+
+------------------------------------------------------------------------------
+ REFERENCES
+
+SC 29 Software Copyright Licencing Disclaimer:
+
+This software module was originally developed by
+  Coding Technologies
+
+and edited by
+  -
+
+in the course of development of the ISO/IEC 13818-7 and ISO/IEC 14496-3
+standards for reference purposes and its performance may not have been
+optimized. This software module is an implementation of one or more tools as
+specified by the ISO/IEC 13818-7 and ISO/IEC 14496-3 standards.
+ISO/IEC gives users free license to this software module or modifications
+thereof for use in products claiming conformance to audiovisual and
+image-coding related ITU Recommendations and/or ISO/IEC International
+Standards. ISO/IEC gives users the same free license to this software module or
+modifications thereof for research purposes and further ISO/IEC standardisation.
+Those intending to use this software module in products are advised that its
+use may infringe existing patents. ISO/IEC have no liability for use of this
+software module or modifications thereof. Copyright is not released for
+products that do not conform to audiovisual and image-coding related ITU
+Recommendations and/or ISO/IEC International Standards.
+The original developer retains full right to modify and use the code for its
+own purpose, assign or donate the code to a third party and to inhibit third
+parties from using the code for products that do not conform to audiovisual and
+image-coding related ITU Recommendations and/or ISO/IEC International Standards.
+This copyright notice must be included in all copies or derivative works.
+Copyright (c) ISO/IEC 2002.
+
+------------------------------------------------------------------------------
+ PSEUDO-CODE
+
+     if(fs < 32000)
+     {
+         k1_min = (Int) ( ( (float) (6000 * 2 * 64) / fs ) + 0.5 );
+     }
+     else
+     {
+         if (fs < 64000)
+         {
+             k1_min = (Int) ( ( (float) (8000 * 2 * 64) / fs ) + 0.5 );
+         }
+         else
+         {
+             k1_min = (Int) ( ((float) (10000 * 2 * 64) / fs ) + 0.5);
+         }
+     }
+
+     return((Int)( k1_min * pow( 64.0 / k1_min,(stop_freq)/13.0) + 0.5));
+
+------------------------------------------------------------------------------
+*/
+
+
+/*----------------------------------------------------------------------------
+; INCLUDES
+----------------------------------------------------------------------------*/
+
+#ifdef AAC_PLUS
+
+#include    "get_sbr_stopfreq.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
+----------------------------------------------------------------------------*/
+
+const UChar sbr_stopfreq_tbl[6][13] =
+{
+
+    { 21, 23, 25, 27, 29, 32, 35, 38, 41, 45, 49, 54, 59},  /* 48000  */
+    { 23, 25, 27, 29, 31, 34, 37, 40, 43, 47, 51, 55, 59},  /* 44100  */
+    { 32, 34, 36, 38, 40, 42, 44, 46, 49, 52, 55, 58, 61},  /* 32000  and 24000 */
+    { 35, 36, 38, 40, 42, 44, 46, 48, 50, 52, 55, 58, 61},  /* 22050  */
+    { 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 60, 62}   /* 16000  */
+
+};
+
+Int get_sbr_stopfreq(const Int32 fs,
+                     const Int32 stop_freq)
+{
+
+    Int i;
+
+    switch (fs)
+    {
+        case 48000:
+            i = 0;
+            break;
+
+        case 32000:
+        case 24000:
+            i = 2;
+            break;
+
+        case 22050:
+            i = 3;
+            break;
+
+        case 16000:
+            i = 4;
+            break;
+
+        case 44100:
+        default:
+            i = 1;
+            break;
+    }
+
+    return((Int)sbr_stopfreq_tbl[i][stop_freq]);
+
+}
+
+
+
+#endif