Add an implementation of get_next_write_timestamp.

Add a default implementation of get_next_write_timestamp to the C <--> C++
legacy audio HAL implementation allowing HALs using the legacy C++
AudioStreamOut to overload and implement get_next_write_timestamp.  Default
implementation returns INVALID_OPERATION to indicate that the functionality is
not supported.

Change-Id: I087347649e9ba186a74cb34aaadf989bf90720fe

1 files changed, 9 insertions, 0 deletions

diff --git a/audio/audio_hw_hal.cpp b/audio/audio_hw_hal.cpp
index f249f88..dd56c80 100644
--- a/audio/audio_hw_hal.cpp
+++ b/audio/audio_hw_hal.cpp
@@ -162,6 +162,14 @@ static int out_get_render_position(const struct audio_stream_out *stream,
     return out->legacy_out->getRenderPosition(dsp_frames);
 }
 
+static int out_get_next_write_timestamp(const struct audio_stream_out *stream,
+                                        int64_t *timestamp)
+{
+    const struct legacy_stream_out *out =
+        reinterpret_cast<const struct legacy_stream_out *>(stream);
+    return out->legacy_out->getNextWriteTimestamp(timestamp);
+}
+
 static int out_add_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
 {
     return 0;
@@ -433,6 +441,7 @@ static int adev_open_output_stream(struct audio_hw_device *dev,
     out->stream.set_volume = out_set_volume;
     out->stream.write = out_write;
     out->stream.get_render_position = out_get_render_position;
+    out->stream.get_next_write_timestamp = out_get_next_write_timestamp;
 
     *stream_out = &out->stream;
     return 0;