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

1 files changed, 231 insertions, 0 deletions

diff --git a/media/libstagefright/codecs/aacdec/window_block_fxp.h b/media/libstagefright/codecs/aacdec/window_block_fxp.h
new file mode 100644
index 0000000..f936199
--- /dev/null
+++ b/media/libstagefright/codecs/aacdec/window_block_fxp.h
@@ -0,0 +1,231 @@
+/* ------------------------------------------------------------------
+ * 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.
+ * -------------------------------------------------------------------
+ */
+/*
+
+ Pathname: window_block_fxp.h
+
+
+------------------------------------------------------------------------------
+ REVISION HISTORY
+
+ Description:
+    modified function definition: Time_data from Int to Int32
+    change wnd_shape from structure to passing parameters
+    delete definition of wnd_shape1, not needed.
+
+ Description: Modified based on unit test comments
+
+ Description: Change copyright, add () around constants.
+
+ Description:
+    changed Long_Window_fxp and Short _Window_fxp tables definition, from
+    "const UInt16 *"  to "const UInt16 * const" to avoid global variable
+    definition.
+
+ Description: Updated function trans4m_freq_2_time_fxp definition
+
+ Description:  Modified function interface to add output_buffer
+
+
+ Description:
+
+------------------------------------------------------------------------------
+ INCLUDE DESCRIPTION
+
+ Header file for window and block switch
+
+
+------------------------------------------------------------------------------
+ REFERENCES
+
+ (1) ISO/IEC 13818-7 Part 7: Advanced Audo Coding (AAC)
+
+
+ (2) MPEG-2 NBC Audio Decoder
+   "This software module was originally developed by AT&T, Dolby
+   Laboratories, Fraunhofer Gesellschaft IIS in the course of development
+   of the MPEG-2 NBC/MPEG-4 Audio standard ISO/IEC 13818-7, 14496-1,2 and
+   3. This software module is an implementation of a part of one or more
+   MPEG-2 NBC/MPEG-4 Audio tools as specified by the MPEG-2 NBC/MPEG-4
+   Audio standard. ISO/IEC gives users of the MPEG-2 NBC/MPEG-4 Audio
+   standards free license to this software module or modifications thereof
+   for use in hardware or software products claiming conformance to the
+   MPEG-2 NBC/MPEG-4 Audio  standards. Those intending to use this software
+   module in hardware or software products are advised that this use may
+   infringe existing patents. The original developer of this software
+   module and his/her company, the subsequent editors and their companies,
+   and ISO/IEC have no liability for use of this software module or
+   modifications thereof in an implementation. Copyright is not released
+   for non MPEG-2 NBC/MPEG-4 Audio conforming products.The original
+   developer retains full right to use the code for his/her own purpose,
+   assign or donate the code to a third party and to inhibit third party
+   from using the code for non MPEG-2 NBC/MPEG-4 Audio conforming products.
+   This copyright notice must be included in all copies or derivative
+   works."
+   Copyright(c)1996.
+
+------------------------------------------------------------------------------
+*/
+
+/*----------------------------------------------------------------------------
+; CONTINUE ONLY IF NOT ALREADY DEFINED
+----------------------------------------------------------------------------*/
+#ifndef WINDOW_BLOCK_FXP_H
+#define WINDOW_BLOCK_FXP_H
+
+
+/*----------------------------------------------------------------------------
+; INCLUDES
+----------------------------------------------------------------------------*/
+#include "pv_audio_type_defs.h"
+#include "e_window_shape.h"
+#include "e_window_sequence.h"
+
+/*----------------------------------------------------------------------------
+; MACROS
+; Define module specific macros here
+----------------------------------------------------------------------------*/
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    /*----------------------------------------------------------------------------
+    ; DEFINES
+    ; Include all pre-processor statements here.
+    ----------------------------------------------------------------------------*/
+#define LONG_WINDOW         (1024)
+#define SHORT_WINDOW        (128)
+
+#define HALF_LONG_WINDOW    (LONG_WINDOW>>1)
+#define HALF_SHORT_WINDOW   (SHORT_WINDOW>>1)
+
+#define NUM_SHORT_WINDOWS   (8)
+#define LONG_WINDOW_m_1     (LONG_WINDOW-1)
+#define SHORT_WINDOW_m_1    (SHORT_WINDOW-1)
+
+    /*
+     *  Limits for window sequences, they are used to build
+     *  each long window, they are defined in the standards
+     */
+#define W_L_START_1         ((3*LONG_WINDOW - SHORT_WINDOW)>>1)
+#define W_L_START_2         ((3*LONG_WINDOW + SHORT_WINDOW)>>1)
+#define W_L_STOP_1          ((LONG_WINDOW - SHORT_WINDOW)>>1)
+#define W_L_STOP_2          ((LONG_WINDOW + SHORT_WINDOW)>>1)
+
+
+#define LONG_BLOCK1          (2*LONG_WINDOW)
+#define SHORT_BLOCK1         (2*SHORT_WINDOW)
+
+
+#define  SCALING    10
+#define  ROUNDING     (1<<(SCALING-1))
+
+
+    /*----------------------------------------------------------------------------
+    ; EXTERNAL VARIABLES REFERENCES
+    ; Declare variables used in this module but defined elsewhere
+    ----------------------------------------------------------------------------*/
+    extern const Int16 Short_Window_KBD_fxp[ SHORT_WINDOW];
+    extern const Int16 Long_Window_KBD_fxp[ LONG_WINDOW];
+    extern const Int16 Short_Window_sine_fxp[ SHORT_WINDOW];
+    extern const Int16 Long_Window_sine_fxp[ LONG_WINDOW];
+
+    extern const Int16 * const Long_Window_fxp[];
+    extern const Int16 * const Short_Window_fxp[];
+
+    /*----------------------------------------------------------------------------
+    ; SIMPLE TYPEDEF'S
+    ----------------------------------------------------------------------------*/
+
+    /*----------------------------------------------------------------------------
+    ; ENUMERATED TYPEDEF'S
+    ----------------------------------------------------------------------------*/
+
+
+
+    /*----------------------------------------------------------------------------
+    ; STRUCTURES TYPEDEF'S
+    ----------------------------------------------------------------------------*/
+
+    /*----------------------------------------------------------------------------
+    ; GLOBAL FUNCTION DEFINITIONS
+    ; Function Prototype declaration
+    ----------------------------------------------------------------------------*/
+
+    void trans4m_freq_2_time_fxp(
+        Int32   Frequency_data[],
+        Int32   Time_data[],
+#ifdef AAC_PLUS
+        Int32   Output_buffer[],
+#else
+        Int16   Output_buffer[],
+#endif
+        WINDOW_SEQUENCE wnd_seq,
+        Int     wnd_shape_prev_bk,
+        Int     wnd_shape_this_bk,
+        Int     Q_format,
+        Int32   abs_max_per_window[],
+        Int32   freq_2_time_buffer[] ,
+        Int16   *Interleave_output
+    );
+
+
+
+    void trans4m_freq_2_time_fxp_1(
+        Int32   Frequency_data[],
+        Int32   Time_data[],
+        Int16   Output_buffer[],
+        WINDOW_SEQUENCE wnd_seq,
+        Int     wnd_shape_prev_bk,
+        Int     wnd_shape_this_bk,
+        Int     Q_format,
+        Int32   abs_max_per_window[],
+        Int32   freq_2_time_buffer[]
+    );
+
+
+    void trans4m_freq_2_time_fxp_2(
+        Int32   Frequency_data[],
+        Int32   Time_data[],
+        WINDOW_SEQUENCE wnd_seq,
+        Int     wnd_shape_prev_bk,
+        Int     wnd_shape_this_bk,
+        Int     Q_format,
+        Int32   abs_max_per_window[],
+        Int32   freq_2_time_buffer[] ,
+        Int16   *Interleave_output
+    );
+
+    void trans4m_time_2_freq_fxp(
+        Int32   Time2Freq_data[],
+        WINDOW_SEQUENCE wnd_seq,
+        Int     wnd_shape_prev_bk,
+        Int     wnd_shape_this_bk,
+        Int     *pQ_format,
+        Int32   mem_4_in_place_FFT[]);
+
+    /*----------------------------------------------------------------------------
+    ; END
+    ----------------------------------------------------------------------------*/
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /*  WINDOW_BLOCK_FXP_H */
+