Audio Effect API: process reverse stream function

Added function to audio effect interface for processing of
a reverse stream.
This is necessary for audio pre processes like echo cancellation.

Change-Id: I6e12d79dbbed6376acdfc79304b8c0ab3f705eae

6 files changed, 51 insertions, 7 deletions

diff --git a/media/libeffects/factory/EffectsFactory.c b/media/libeffects/factory/EffectsFactory.c
index a3e76d9..a9689bc 100644
--- a/media/libeffects/factory/EffectsFactory.c
+++ b/media/libeffects/factory/EffectsFactory.c
@@ -130,10 +130,43 @@ int Effect_GetDescriptor(effect_handle_t self,
     return ret;
 }
 
+int Effect_ProcessReverse(effect_handle_t self, audio_buffer_t *inBuffer, audio_buffer_t *outBuffer)
+{
+    int ret = init();
+    if (ret < 0) {
+        return ret;
+    }
+    effect_entry_t *fx = (effect_entry_t *)self;
+    pthread_mutex_lock(&gLibLock);
+    if (fx->lib == NULL) {
+        pthread_mutex_unlock(&gLibLock);
+        return -EPIPE;
+    }
+    pthread_mutex_lock(&fx->lib->lock);
+    pthread_mutex_unlock(&gLibLock);
+
+    if ((*fx->subItfe)->process_reverse != NULL) {
+        ret = (*fx->subItfe)->process_reverse(fx->subItfe, inBuffer, outBuffer);
+    } else {
+        ret = -ENOSYS;
+    }
+    pthread_mutex_unlock(&fx->lib->lock);
+    return ret;
+}
+
+
 const struct effect_interface_s gInterface = {
         Effect_Process,
         Effect_Command,
-        Effect_GetDescriptor
+        Effect_GetDescriptor,
+        NULL
+};
+
+const struct effect_interface_s gInterfaceWithReverse = {
+        Effect_Process,
+        Effect_Command,
+        Effect_GetDescriptor,
+        Effect_ProcessReverse
 };
 
 /////////////////////////////////////////////////
@@ -266,7 +299,13 @@ int EffectCreate(effect_uuid_t *uuid, int32_t sessionId, int32_t ioId, effect_ha
     // add entry to effect list
     fx = (effect_entry_t *)malloc(sizeof(effect_entry_t));
     fx->subItfe = itfe;
-    fx->itfe = (struct effect_interface_s *)&gInterface;
+    if ((*itfe)->process_reverse != NULL) {
+        fx->itfe = (struct effect_interface_s *)&gInterfaceWithReverse;
+        LOGV("EffectCreate() gInterfaceWithReverse");
+    }   else {
+        fx->itfe = (struct effect_interface_s *)&gInterface;
+        LOGV("EffectCreate() gInterface");
+    }
     fx->lib = l;
 
     e = (list_elem_t *)malloc(sizeof(list_elem_t));
diff --git a/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp b/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp
index 21c451f..efa1c45 100644
--- a/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp
+++ b/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp
@@ -3231,7 +3231,8 @@ int Effect_getDescriptor(effect_handle_t   self,
 const struct effect_interface_s gLvmEffectInterface = {
     Effect_process,
     Effect_command,
-    Effect_getDescriptor
+    Effect_getDescriptor,
+    NULL,
 };    /* end gLvmEffectInterface */
 
 audio_effect_library_t AUDIO_EFFECT_LIBRARY_INFO_SYM = {
diff --git a/media/libeffects/lvm/wrapper/Reverb/EffectReverb.cpp b/media/libeffects/lvm/wrapper/Reverb/EffectReverb.cpp
index 2727375..663f8ff 100755
--- a/media/libeffects/lvm/wrapper/Reverb/EffectReverb.cpp
+++ b/media/libeffects/lvm/wrapper/Reverb/EffectReverb.cpp
@@ -2134,7 +2134,8 @@ int Reverb_getDescriptor(effect_handle_t   self,
 const struct effect_interface_s gReverbInterface = {
     Reverb_process,
     Reverb_command,
-    Reverb_getDescriptor
+    Reverb_getDescriptor,
+    NULL,
 };    /* end gReverbInterface */
 
 audio_effect_library_t AUDIO_EFFECT_LIBRARY_INFO_SYM = {
diff --git a/media/libeffects/testlibs/EffectEqualizer.cpp b/media/libeffects/testlibs/EffectEqualizer.cpp
index c2ffce5..b22ebec 100644
--- a/media/libeffects/testlibs/EffectEqualizer.cpp
+++ b/media/libeffects/testlibs/EffectEqualizer.cpp
@@ -736,7 +736,8 @@ extern "C" int Equalizer_getDescriptor(effect_handle_t   self,
 const struct effect_interface_s gEqualizerInterface = {
         Equalizer_process,
         Equalizer_command,
-        Equalizer_getDescriptor
+        Equalizer_getDescriptor,
+        NULL
 };
 
 
diff --git a/media/libeffects/testlibs/EffectReverb.c b/media/libeffects/testlibs/EffectReverb.c
index 02762c9..405f908 100644
--- a/media/libeffects/testlibs/EffectReverb.c
+++ b/media/libeffects/testlibs/EffectReverb.c
@@ -27,7 +27,8 @@
 const struct effect_interface_s gReverbInterface = {
         Reverb_Process,
         Reverb_Command,
-        Reverb_GetDescriptor
+        Reverb_GetDescriptor,
+        NULL
 };
 
 // Google auxiliary environmental reverb UUID: 1f0ae2e0-4ef7-11df-bc09-0002a5d5c51b
diff --git a/media/libeffects/visualizer/EffectVisualizer.cpp b/media/libeffects/visualizer/EffectVisualizer.cpp
index aeebd4d..3c3af8f 100644
--- a/media/libeffects/visualizer/EffectVisualizer.cpp
+++ b/media/libeffects/visualizer/EffectVisualizer.cpp
@@ -450,7 +450,8 @@ int Visualizer_getDescriptor(effect_handle_t   self,
 const struct effect_interface_s gVisualizerInterface = {
         Visualizer_process,
         Visualizer_command,
-        Visualizer_getDescriptor
+        Visualizer_getDescriptor,
+        NULL,
 };