Audio: fix Android 8.1 CTS AAudio failure. [1/1]

PD# 158018

Let A = sourceFramesNeededWithTimestrech()
Let B = mFrameCount = mBufferSize / mFrameSize

frameCount = minBufCount * A
           = (PERIOD_SIZE * PERIOD_COUNT) * A / ((1000 * multiplier * B) / afSampleRate)

The value of frameCount is too large so CTS fails, to decrease frameCount,
we can decrease (PERIOD_SIZE * PERIOD_COUNT), or increase mBufferSize.
Through this way we can pass AAudio CTS test.

Change-Id: Iefc2bd682c22e417f3c453d664f9b2a5e3d5aff4

1 files changed, 3 insertions, 8 deletions

diff --git a/audio_hw.c b/audio_hw.c
index c1a0a5f..a1485ef 100644
--- a/audio_hw.c
+++ b/audio_hw.c
@@ -69,15 +69,9 @@
 #define PORT_I2S 0
 #define PORT_SPDIF 1
 #define PORT_PCM 2
-/* number of frames per period */
-#define DEFAULT_PERIOD_SIZE  1024
+
 #define DEFAULT_CAPTURE_PERIOD_SIZE  1024
-//static unsigned  PERIOD_SIZE  = DEFAULT_PERIOD_SIZE;
 static unsigned  CAPTURE_PERIOD_SIZE = DEFAULT_CAPTURE_PERIOD_SIZE;
-/* number of periods for low power playback */
-#define PLAYBACK_PERIOD_COUNT 4
-/* number of periods for capture */
-#define CAPTURE_PERIOD_COUNT 4
 
 /* minimum sleep time in out_write() when write threshold is not reached */
 #define MIN_WRITE_SLEEP_US 5000
@@ -735,7 +729,8 @@ static size_t out_get_buffer_size(const struct audio_stream *stream)
         if (out->config.rate == 96000)
             size = PERIOD_SIZE * 2;
         else
-            size = PERIOD_SIZE;
+            // bug_id - 158018, modify size value from PERIOD_SIZE to (PERIOD_SIZE * PLAYBACK_PERIOD_COUNT)
+            size = PERIOD_SIZE * PLAYBACK_PERIOD_COUNT;
     }
     size = ((size + 15) / 16) * 16;
     return size * audio_stream_out_frame_size((struct audio_stream_out *)stream);