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Commit a7b41619 authored by Andre Eisenbach's avatar Andre Eisenbach Committed by android-build-merger
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A2DP: Lowering maximum PCM frame limit to avoid audio breaks 

automerge: e8b59af9

* commit 'e8b59af9':
  A2DP: Lowering maximum PCM frame limit to avoid audio breaks
parents ead64900 e8b59af9

system/btif/src/btif_media_task.c

+7 −6
Original line number Diff line number Diff line
@@ -209,7 +209,7 @@ static UINT32 a2dp_media_task_stack[(A2DP_MEDIA_TASK_STACK_SIZE + 3) / 4]; 
/* 18 frames is equivalent to 6.89*18*2.9 ~= 360 ms @ 44.1 khz, 20 ms mediatick */

#define MAX_OUTPUT_A2DP_FRAME_QUEUE_SZ 18

#define A2DP_PACKET_COUNT_LOW_WATERMARK 5

#define MAX_PCM_FRAME_NUM_PER_TICK     20

#define MAX_PCM_FRAME_NUM_PER_TICK     10

#define RESET_RATE_COUNTER_THRESHOLD_MS    2000



//#define BTIF_MEDIA_VERBOSE_ENABLED
@@ -2476,16 +2476,17 @@ static UINT8 btif_get_num_aa_frame(void) 
                }

                /* calculate nbr of frames pending for this media tick */

                result = btif_media_cb.media_feeding_state.pcm.counter/pcm_bytes_per_frame;

                if (result > MAX_PCM_FRAME_NUM_PER_TICK) result = MAX_PCM_FRAME_NUM_PER_TICK;

                if (result > MAX_PCM_FRAME_NUM_PER_TICK)

                {

                    APPL_TRACE_ERROR("%s() - Limiting frames to be sent from %d to %d"

                        , __FUNCTION__, result, MAX_PCM_FRAME_NUM_PER_TICK);

                    result = MAX_PCM_FRAME_NUM_PER_TICK;

                }

                btif_media_cb.media_feeding_state.pcm.counter -= result*pcm_bytes_per_frame;

            } else {

                result = 0;

            }



            /* smooth out the compensation over time to minimize burstiness towards UIPC */

            if (result > MAX_PCM_FRAME_NUM_PER_TICK)

                result = MAX_PCM_FRAME_NUM_PER_TICK;



            VERBOSE("WRITE %d FRAMES", result);

        }

        break;