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

1 files changed, 221 insertions, 0 deletions

diff --git a/media/libstagefright/codecs/aacdec/sbr_get_header_data.cpp b/media/libstagefright/codecs/aacdec/sbr_get_header_data.cpp
new file mode 100644
index 0000000..42789ae
--- /dev/null
+++ b/media/libstagefright/codecs/aacdec/sbr_get_header_data.cpp
@@ -0,0 +1,221 @@
+/* ------------------------------------------------------------------
+ * 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_get_header_data.c
+
+------------------------------------------------------------------------------
+ REVISION HISTORY
+
+
+ Who:                                   Date: MM/DD/YYYY
+ Description:
+
+------------------------------------------------------------------------------
+ INPUT AND OUTPUT DEFINITIONS
+
+ Arguments:     h_sbr_header - handle to struct SBR_HEADER_DATA
+                hBitBuf      - handle to struct BIT_BUFFER
+                id_sbr       - SBR_ELEMENT_ID
+
+ Return:        error status - 0 if ok
+
+
+------------------------------------------------------------------------------
+ FUNCTION DESCRIPTION
+
+    Reads header data from bitstream
+
+------------------------------------------------------------------------------
+ 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_get_header_data.h"
+#include    "sbr_constants.h"
+#include    "buf_getbits.h"
+#include    "aac_mem_funcs.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
+----------------------------------------------------------------------------*/
+
+SBR_HEADER_STATUS sbr_get_header_data(SBR_HEADER_DATA   * h_sbr_header,
+                                      BIT_BUFFER          * hBitBuf,
+                                      SBR_SYNC_STATE     syncState)
+{
+    SBR_HEADER_DATA lastHeader;
+    Int32 headerExtra1, headerExtra2;
+
+
+    /* Copy header to temporary header */
+    if (syncState == SBR_ACTIVE)
+    {
+        pv_memcpy(&lastHeader, h_sbr_header, sizeof(SBR_HEADER_DATA));
+    }
+    else
+    {
+        pv_memset((void *)&lastHeader, 0, sizeof(SBR_HEADER_DATA));
+    }
+
+
+    /* Read new header from bitstream */
+    h_sbr_header->ampResolution   = buf_getbits(hBitBuf, SI_SBR_AMP_RES_BITS);
+    h_sbr_header->startFreq       = buf_getbits(hBitBuf, SI_SBR_START_FREQ_BITS);
+    h_sbr_header->stopFreq        = buf_getbits(hBitBuf, SI_SBR_STOP_FREQ_BITS);
+    h_sbr_header->xover_band      = buf_getbits(hBitBuf, SI_SBR_XOVER_BAND_BITS);
+
+    buf_getbits(hBitBuf, SI_SBR_RESERVED_BITS_HDR);
+
+    headerExtra1    = buf_getbits(hBitBuf, SI_SBR_HEADER_EXTRA_1_BITS);
+    headerExtra2    = buf_getbits(hBitBuf, SI_SBR_HEADER_EXTRA_2_BITS);
+
+    /* handle extra header information */
+    if (headerExtra1)
+    {
+        h_sbr_header->freqScale   = buf_getbits(hBitBuf, SI_SBR_FREQ_SCALE_BITS);
+        h_sbr_header->alterScale  = buf_getbits(hBitBuf, SI_SBR_ALTER_SCALE_BITS);
+        h_sbr_header->noise_bands = buf_getbits(hBitBuf, SI_SBR_NOISE_BANDS_BITS);
+    }
+    else
+    { /* Set default values.*/
+        h_sbr_header->freqScale   = SBR_FREQ_SCALE_DEFAULT;
+        h_sbr_header->alterScale  = SBR_ALTER_SCALE_DEFAULT;
+        h_sbr_header->noise_bands = SBR_NOISE_BANDS_DEFAULT;
+    }
+
+
+    if (headerExtra2)
+    {
+        h_sbr_header->limiterBands    = buf_getbits(hBitBuf, SI_SBR_LIMITER_BANDS_BITS);
+        h_sbr_header->limiterGains    = buf_getbits(hBitBuf, SI_SBR_LIMITER_GAINS_BITS);
+        h_sbr_header->interpolFreq    = buf_getbits(hBitBuf, SI_SBR_INTERPOL_FREQ_BITS);
+        h_sbr_header->smoothingLength = buf_getbits(hBitBuf, SI_SBR_SMOOTHING_LENGTH_BITS);
+    }
+    else
+    { /* Set default values.*/
+        h_sbr_header->limiterBands    = SBR_LIMITER_BANDS_DEFAULT;
+        h_sbr_header->limiterGains    = SBR_LIMITER_GAINS_DEFAULT;
+        h_sbr_header->interpolFreq    = SBR_INTERPOL_FREQ_DEFAULT;
+        h_sbr_header->smoothingLength = SBR_SMOOTHING_LENGTH_DEFAULT;
+    }
+
+    if (syncState == SBR_ACTIVE)
+    {
+        h_sbr_header->status = HEADER_OK;
+
+        /* look for new settings */
+        if (lastHeader.startFreq   != h_sbr_header->startFreq   ||
+                lastHeader.stopFreq    != h_sbr_header->stopFreq    ||
+                lastHeader.xover_band  != h_sbr_header->xover_band  ||
+                lastHeader.freqScale   != h_sbr_header->freqScale   ||
+                lastHeader.alterScale  != h_sbr_header->alterScale  ||
+                lastHeader.noise_bands != h_sbr_header->noise_bands)
+        {
+            h_sbr_header->status = HEADER_RESET;
+        }
+    }
+    else
+    {
+        h_sbr_header->status = HEADER_RESET;
+    }
+
+    return h_sbr_header->status;
+}
+
+#endif
+
+
+