SBR header period

AAC encoder: Connect SBR and PS header repetition rate with AACENC_HEADER_PERIOD
     parameter of the encoder API.

Bug 9428126

Change-Id: Ia1ab965de9eaa2ac229d0c395a337cbd4d20cba1

3 files changed, 19 insertions, 3 deletions

diff --git a/libSBRenc/include/sbr_encoder.h b/libSBRenc/include/sbr_encoder.h
index 5bbc197..f8f2a5c 100644
--- a/libSBRenc/include/sbr_encoder.h
+++ b/libSBRenc/include/sbr_encoder.h
@@ -298,6 +298,9 @@ UINT sbrEncoder_LimitBitRate(UINT bitRate, UINT numChannels, UINT coreSampleRate
  * \param aot              Input: Desired AOT. output AOT to be used after parameter checking.
  * \param delay            Input: core encoder delay. Output: total delay because of SBR.
  * \param transformFactor  The core encoder transform factor (blockswitching).
+ * \param headerPeriod     Repetition rate of the SBR header:
+ *                           - (-1) means intern configuration.
+ *                           - (1-10) corresponds to header repetition rate in frames.
  * \return                 0 on success, and non-zero if failed.
  */
 INT sbrEncoder_Init( HANDLE_SBR_ENCODER hSbrEncoder,
@@ -312,6 +315,7 @@ INT sbrEncoder_Init( HANDLE_SBR_ENCODER hSbrEncoder,
                      AUDIO_OBJECT_TYPE *aot,
                      int *delay,
                      int  transformFactor,
+                     const int headerPeriod,
                      ULONG statesInitFlag
                     );
 
diff --git a/libSBRenc/src/ps_main.cpp b/libSBRenc/src/ps_main.cpp
index 7e77a90..76b759a 100644
--- a/libSBRenc/src/ps_main.cpp
+++ b/libSBRenc/src/ps_main.cpp
@@ -227,6 +227,8 @@ FDK_PSENC_ERROR PSEnc_Init(
     /* clear bs buffer */
     FDKmemclear(hParametricStereo->psOut, sizeof(hParametricStereo->psOut));
 
+    hParametricStereo->psOut[0].enablePSHeader = 1; /* write ps header in first frame */
+
     /* clear scaling buffer */
     FDKmemclear(hParametricStereo->dynBandScale, sizeof(UCHAR)*PS_MAX_BANDS);
     FDKmemclear(hParametricStereo->maxBandValue, sizeof(FIXP_QMF)*PS_MAX_BANDS);
diff --git a/libSBRenc/src/sbr_encoder.cpp b/libSBRenc/src/sbr_encoder.cpp
index ac0c869..d7ecae5 100644
--- a/libSBRenc/src/sbr_encoder.cpp
+++ b/libSBRenc/src/sbr_encoder.cpp
@@ -103,7 +103,7 @@ amm-info@iis.fraunhofer.de
 
 #define SBRENCODER_LIB_VL0 3
 #define SBRENCODER_LIB_VL1 3
-#define SBRENCODER_LIB_VL2 1
+#define SBRENCODER_LIB_VL2 2
 
 
 
@@ -1462,6 +1462,7 @@ INT FDKsbrEnc_EnvInit (
                        AUDIO_OBJECT_TYPE aot,
                        int       nBitstrDelay,
                        int       nElement,
+                       const int headerPeriod,
                        ULONG     statesInitFlag
                       ,UCHAR    *dynamic_RAM
                       )
@@ -1521,9 +1522,16 @@ INT FDKsbrEnc_EnvInit (
   hSbrElement->sbrBitstreamData.CountSendHeaderData = 0;
   if (params->SendHeaderDataTime > 0 ) {
 
-    hSbrElement->sbrBitstreamData.NrSendHeaderData = (INT)(params->SendHeaderDataTime * hSbrElement->sbrConfigData.sampleFreq
+    if (headerPeriod==-1) {
+
+      hSbrElement->sbrBitstreamData.NrSendHeaderData = (INT)(params->SendHeaderDataTime * hSbrElement->sbrConfigData.sampleFreq
                                                / (1000 * hSbrElement->sbrConfigData.frameSize));
-    hSbrElement->sbrBitstreamData.NrSendHeaderData = fixMax(hSbrElement->sbrBitstreamData.NrSendHeaderData,1);
+      hSbrElement->sbrBitstreamData.NrSendHeaderData = fixMax(hSbrElement->sbrBitstreamData.NrSendHeaderData,1);
+    }
+    else {
+      /* assure header period at least once per second */
+      hSbrElement->sbrBitstreamData.NrSendHeaderData = fixMin(fixMax(headerPeriod,1),(hSbrElement->sbrConfigData.sampleFreq/hSbrElement->sbrConfigData.frameSize));
+    }
   }
   else {
    hSbrElement->sbrBitstreamData.NrSendHeaderData = 0;
@@ -1723,6 +1731,7 @@ INT sbrEncoder_Init(
                      AUDIO_OBJECT_TYPE *aot,
                      int *delay,
                      int  transformFactor,
+                     const int headerPeriod,
                      ULONG  statesInitFlag
                     )
 {
@@ -1962,6 +1971,7 @@ INT sbrEncoder_Init(
                                   *aot,
                                    nBitstrDelay,
                                    el,
+                                   headerPeriod,
                                    statesInitFlag
                                   ,hSbrEncoder->dynamicRam
                                   );