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

1 files changed, 223 insertions, 0 deletions

diff --git a/media/libstagefright/codecs/aacdec/sbr_extract_extended_data.cpp b/media/libstagefright/codecs/aacdec/sbr_extract_extended_data.cpp
new file mode 100644
index 0000000..92b22f7
--- /dev/null
+++ b/media/libstagefright/codecs/aacdec/sbr_extract_extended_data.cpp
@@ -0,0 +1,223 @@
+/* ------------------------------------------------------------------
+ * 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: sbr_extract_extended_data.c
+
+------------------------------------------------------------------------------
+ REVISION HISTORY
+
+
+ Who:                                   Date: MM/DD/YYYY
+ Description:
+
+------------------------------------------------------------------------------
+ INPUT AND OUTPUT DEFINITIONS
+
+    SBR_FRAME_DATA *hFrameData,     Destination for extracted data of left channel
+    SBR_FRAME_DATA *hFrameDataRight Destination for extracted data of right channel
+    BIT_BUFFER hBitBuf              pointer to bit buffer
+
+
+------------------------------------------------------------------------------
+ FUNCTION DESCRIPTION
+
+  Reads extension data from the bitstream
+
+  The bitstream format allows up to 4 kinds of extended data element.
+  Extended data may contain several elements, each identified by a 2-bit-ID.
+
+------------------------------------------------------------------------------
+ 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    "sbr_extract_extended_data.h"
+#include    "buf_getbits.h"
+
+#ifdef PARAMETRICSTEREO
+#include    "ps_read_data.h"
+#endif
+
+/*----------------------------------------------------------------------------
+; 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 sbr_extract_extended_data(BIT_BUFFER * hBitBuf
+#ifdef PARAMETRICSTEREO         /* Parametric Stereo Decoder */
+                               , HANDLE_PS_DEC hParametricStereoDec
+#endif
+                              )
+{
+    Int32 extended_data;
+    Int32 i;
+    Int32 nBitsLeft;
+    Int32 extension_id;
+
+    extended_data = buf_get_1bit(hBitBuf);    /*  SI_SBR_EXTENDED_DATA_BITS  */
+
+    if (extended_data)
+    {
+        Int32 cnt;
+
+        cnt = buf_getbits(hBitBuf, SI_SBR_EXTENSION_SIZE_BITS);
+        if (cnt == (1 << SI_SBR_EXTENSION_SIZE_BITS) - 1)
+        {
+            cnt += buf_getbits(hBitBuf, SI_SBR_EXTENSION_ESC_COUNT_BITS);
+        }
+
+        nBitsLeft = (cnt << 3);
+        while (nBitsLeft > 7)
+        {
+            extension_id = buf_getbits(hBitBuf, SI_SBR_EXTENSION_ID_BITS);
+            nBitsLeft -= SI_SBR_EXTENSION_ID_BITS;
+
+            switch (extension_id)
+            {
+#ifdef HQ_SBR
+#ifdef PARAMETRICSTEREO
+
+                    /*
+                     *  Parametric Coding supports the Transient, Sinusoidal, Noise, and
+                     *  Parametric Stereo tools (MPEG4).
+                     *  3GPP use aac+ hq along with ps for enhanced aac+
+                     *  The PS tool uses complex-value QMF data, therefore can not be used
+                     *  with low power version of aac+
+                     */
+                case EXTENSION_ID_PS_CODING:
+
+                    if (hParametricStereoDec != NULL)
+                    {
+                        if (!hParametricStereoDec->psDetected)
+                        {
+                            /* parametric stereo detected */
+                            hParametricStereoDec->psDetected = 1;
+                        }
+
+                        nBitsLeft -= ps_read_data(hParametricStereoDec,
+                                                  hBitBuf,
+                                                  nBitsLeft);
+
+                    }
+
+                    break;
+#endif
+#endif
+                case 0:
+
+                default:
+                    /*   An unknown extension id causes the remaining extension data
+                     *   to be skipped
+                     */
+                    cnt = nBitsLeft >> 3; /* number of remaining bytes */
+
+                    for (i = 0; i < cnt; i++)
+                    {
+                        buf_getbits(hBitBuf, 8);
+                    }
+
+                    nBitsLeft -= (cnt << 3);
+            }
+        }
+        /* read fill bits for byte alignment */
+        buf_getbits(hBitBuf, nBitsLeft);
+    }
+}
+
+
+#endif
+
+
+