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

1 files changed, 183 insertions, 0 deletions

diff --git a/media/libstagefright/codecs/aacdec/get_sbr_bitstream.cpp b/media/libstagefright/codecs/aacdec/get_sbr_bitstream.cpp
new file mode 100644
index 0000000..b6ec365
--- /dev/null
+++ b/media/libstagefright/codecs/aacdec/get_sbr_bitstream.cpp
@@ -0,0 +1,183 @@
+/* ------------------------------------------------------------------
+ * 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_bitstream.c
+
+------------------------------------------------------------------------------
+ REVISION HISTORY
+
+
+ Who:                                   Date: MM/DD/YYYY
+ Description:
+
+------------------------------------------------------------------------------
+ INPUT AND OUTPUT DEFINITIONS
+
+    INPUT
+
+    SBRDECODER self,
+    SBRBITSTREAM * stream,
+    float *timeData,
+    int numChannels
+
+    OUTPUT
+
+    errorCode, noError if successful
+
+------------------------------------------------------------------------------
+ FUNCTION DESCRIPTION
+
+        sbr decoder processing, set up SBR decoder phase 2 in case of
+        different cotrol data
+
+------------------------------------------------------------------------------
+ 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
+
+------------------------------------------------------------------------------
+*/
+
+
+/*----------------------------------------------------------------------------
+; INCLUDES
+----------------------------------------------------------------------------*/
+#ifdef AAC_PLUS
+
+#include "get_sbr_bitstream.h"
+#include "pv_audio_type_defs.h"
+#include    "sbr_crc_check.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
+----------------------------------------------------------------------------*/
+
+void get_sbr_bitstream(SBRBITSTREAM *sbrBitStream, BITS *pInputStream)
+{
+    /*----------------------------------------------------------------------------
+    ; Define all local variables
+    ----------------------------------------------------------------------------*/
+
+    Int32 count;
+    Int32 esc_count;
+    Int32 Extention_Type;
+    Int32 i;
+
+    count = get9_n_lessbits(LEN_F_CNT, pInputStream);
+    if (count == 15)
+    {
+        esc_count = get9_n_lessbits(LEN_F_ESC, pInputStream);
+        count = esc_count + 14;
+    }
+
+
+
+    Extention_Type = get9_n_lessbits(LEN_F_CNT, pInputStream);
+
+
+    if (((Extention_Type == SBR_EXTENSION) || (Extention_Type == SBR_EXTENSION_CRC))
+            && (count < MAXSBRBYTES) && (count) && (sbrBitStream->NrElements < MAXNRELEMENTS))
+    {
+
+        sbrBitStream->sbrElement[sbrBitStream->NrElements].ExtensionType = Extention_Type;
+        sbrBitStream->sbrElement[sbrBitStream->NrElements].Payload       = count;
+        sbrBitStream->sbrElement[sbrBitStream->NrElements].Data[0]       = (UChar) get9_n_lessbits(LEN_F_CNT, pInputStream);
+        for (i = 1 ; i < count ; i++)
+        {
+            sbrBitStream->sbrElement[sbrBitStream->NrElements].Data[i] = (UChar) get9_n_lessbits(8, pInputStream);
+        }
+
+        sbrBitStream->NrElements += 1;
+
+    }
+    else
+    {
+        pInputStream->usedBits += (count - 1) * LEN_BYTE;
+        pInputStream->usedBits += 4;        /* compenste for LEN_F_CNT (=4) bits read for Extention_Type */
+
+    }
+}
+
+#endif