iomx: add android GraphicBuffers functions.

- OMXAndroid_EnableGraphicBuffers: activate GraphicBuffers.
  Next call of OMX_GetParameter(OMX_IndexParamPortDefinition) will return a
  private eColorFormat compatible with android hal_format.

- OMXAndroid_GetGraphicBufferUsage: return hw_usage that will be used to
  allocate android hw buffers.
Signed-off-by: Martin Storsjö <martin@martin.st>

modules/codec/omxil/iomx.cpp

@@ -404,5 +404,25 @@ OMX_ERRORTYPE PREFIX(OMX_GetComponentsOfRole)(OMX_STRING role, OMX_U32 *num_comp
     *num_comps = i;
     return OMX_ErrorNone;
 }
+
+#ifdef HAS_USE_BUFFER
+OMX_ERRORTYPE PREFIX(OMXAndroid_EnableGraphicBuffers)(OMX_HANDLETYPE component, OMX_U32 port_index, OMX_BOOL enable)
+{
+    OMXNode* node = (OMXNode*) ((OMX_COMPONENTTYPE*)component)->pComponentPrivate;
+    int ret = ctx->iomx->enableGraphicBuffers(node->node, port_index, enable);
+    if (ret != OK)
+        return OMX_ErrorUndefined;
+    return OMX_ErrorNone;
+}
+
+OMX_ERRORTYPE PREFIX(OMXAndroid_GetGraphicBufferUsage)(OMX_HANDLETYPE component, OMX_U32 port_index, OMX_U32* usage)
+{
+    OMXNode* node = (OMXNode*) ((OMX_COMPONENTTYPE*)component)->pComponentPrivate;
+    int ret = ctx->iomx->getGraphicBufferUsage(node->node, port_index, usage);
+    if (ret != OK)
+        return OMX_ErrorUndefined;
+    return OMX_ErrorNone;
+}
+#endif
 }
 

modules/codec/omxil/omxil_core.c

@@ -87,6 +87,9 @@ OMX_ERRORTYPE (*pf_get_handle) (OMX_HANDLETYPE *, OMX_STRING,
 OMX_ERRORTYPE (*pf_free_handle) (OMX_HANDLETYPE);
 OMX_ERRORTYPE (*pf_component_enum)(OMX_STRING, OMX_U32, OMX_U32);
 OMX_ERRORTYPE (*pf_get_roles_of_component)(OMX_STRING, OMX_U32 *, OMX_U8 **);
+OMX_ERRORTYPE (*pf_enable_graphic_buffers)(OMX_HANDLETYPE, OMX_U32, OMX_BOOL);
+OMX_ERRORTYPE (*pf_get_graphic_buffer_usage)(OMX_HANDLETYPE, OMX_U32, OMX_U32*);
+
 int (*pf_omx_hwbuffer_connect) (void *);
 int (*pf_omx_hwbuffer_disconnect) (void *);
 int (*pf_omx_hwbuffer_setup) (void *, int, int, int, int, unsigned int *,
@@ -169,6 +172,9 @@ int InitOmxCore(vlc_object_t *p_this)
         return VLC_EGENERIC;
     }
 #if defined(USE_IOMX)
+    pf_enable_graphic_buffers = dlsym( dll_handle, "OMXAndroid_EnableGraphicBuffers" );
+    pf_get_graphic_buffer_usage = dlsym( dll_handle, "OMXAndroid_GetGraphicBufferUsage" );
+
     pf_omx_hwbuffer_connect = dlsym( dll_handle, "OMXHWBuffer_Connect" );
     pf_omx_hwbuffer_disconnect = dlsym( dll_handle, "OMXHWBuffer_Disconnect" );
     pf_omx_hwbuffer_setup = dlsym( dll_handle, "OMXHWBuffer_Setup" );

modules/codec/omxil/omxil_core.h

@@ -33,6 +33,10 @@ OMX_ERRORTYPE (*pf_free_handle) (OMX_HANDLETYPE);
 OMX_ERRORTYPE (*pf_component_enum)(OMX_STRING, OMX_U32, OMX_U32);
 OMX_ERRORTYPE (*pf_get_roles_of_component)(OMX_STRING, OMX_U32 *, OMX_U8 **);
 
+/* Extra IOMX android functions. Can be NULL if we don't link with libiomx */
+OMX_ERRORTYPE (*pf_enable_graphic_buffers)(OMX_HANDLETYPE, OMX_U32, OMX_BOOL);
+OMX_ERRORTYPE (*pf_get_graphic_buffer_usage)(OMX_HANDLETYPE, OMX_U32, OMX_U32*);
+
 /* OMXHWBuffer functions */
 int (*pf_omx_hwbuffer_connect) (void *);
 int (*pf_omx_hwbuffer_disconnect) (void *);