Encoder downsampled SBR

* AAC-Encoder

   - Introduce optional AACENC_SBR_RATIO encoder API parameter to configure
     dualrate or downsampled SBR explicitely. ELD makes use of downsampled SBR
     in default configuration.
     Modified file(s):
        documentation\aacEncoder.pdf
        libAACenc\include\aacenc_lib.h
        libAACenc\src\aacenc.h
        libAACenc\src\aacenc_lib.cpp

* SBR-Encoder

   - Implement downsampled SBR feature.
   - Revise sbr tuning parameter selection.
     Modified file(s):
        libSBRenc\include\sbr_encoder.h
        libSBRenc\src\bit_sbr.h
        libSBRenc\src\env_est.cpp
        libSBRenc\src\mh_det.cpp
        libSBRenc\src\nf_est.cpp
        libSBRenc\src\ps_main.cpp
        libSBRenc\src\sbr.h
        libSBRenc\src\sbr_def.h
        libSBRenc\src\sbr_encoder.cpp
        libSBRenc\src\sbr_rom.cpp
        libSBRenc\src\sbr_rom.h
        libSBRenc\src\sbrenc_freq_sca.cpp
        libSBRenc\src\sbrenc_freq_sca.h
        libSBRenc\src\ton_corr.cpp

Bug 9428126

Change-Id: I731720a10829272acaaf70b84525df00a09ff3d2

1 files changed, 8 insertions, 6 deletions

diff --git a/libSBRenc/src/sbr.h b/libSBRenc/src/sbr.h
index eed847f..cfc595e 100644
--- a/libSBRenc/src/sbr.h
+++ b/libSBRenc/src/sbr.h
@@ -105,7 +105,8 @@ amm-info@iis.fraunhofer.de
 /* SBR bitstream delay */
   #define DELAY_FRAMES 2
 
-typedef struct {
+
+typedef struct SBR_CHANNEL {
     struct ENV_CHANNEL        hEnvChannel;
     //INT_PCM                  *pDSOutBuffer;            /**< Pointer to downsampled audio output of SBR encoder */
     DOWNSAMPLER               downSampler;
@@ -113,7 +114,7 @@ typedef struct {
 } SBR_CHANNEL;
 typedef SBR_CHANNEL* HANDLE_SBR_CHANNEL;
 
-typedef struct {
+typedef struct SBR_ELEMENT {
     HANDLE_SBR_CHANNEL        sbrChannel[2];
     QMF_FILTER_BANK          *hQmfAnalysis[2];
     SBR_CONFIG_DATA           sbrConfigData;
@@ -126,10 +127,9 @@ typedef struct {
     UCHAR                     payloadDelayLine[1+DELAY_FRAMES][MAX_PAYLOAD_SIZE];
     UINT                      payloadDelayLineSize[1+DELAY_FRAMES];                 /* Sizes in bits */
 
-} SBR_ELEMENT;
-typedef SBR_ELEMENT* HANDLE_SBR_ELEMENT;
+} SBR_ELEMENT, *HANDLE_SBR_ELEMENT;
 
-struct SBR_ENCODER
+typedef struct SBR_ENCODER
 {
   HANDLE_SBR_ELEMENT   sbrElement[(6)];
   HANDLE_SBR_CHANNEL   pSbrChannel[(6)];
@@ -142,6 +142,7 @@ struct SBR_ENCODER
   int                  bufferOffset;             /* Offset for SBR parameter extraction in time domain input buffer. */
   int                  downsampledOffset;        /* Offset of downsampled/mixed output for core encoder. */
   int                  downmixSize;              /* Size in samples of downsampled/mixed output for core encoder. */
+  INT                  downSampleFactor;         /* Sampling rate relation between the SBR and the core encoder. */
   int                  fTimeDomainDownsampling;  /* Flag signalling time domain downsampling instead of QMF downsampling. */
   int                  nBitstrDelay;             /* Amount of SBR frames to be delayed in bitstream domain. */
   INT                  estimateBitrate;          /* estimate bitrate of SBR encoder */
@@ -158,7 +159,8 @@ struct SBR_ENCODER
   INT                  maxChannels;
   INT                  supportPS;
 
-} ;
+
+} SBR_ENCODER;
 
 
 #endif /* __SBR_H */