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Commit 187dcd4e authored by Phil Burk's avatar Phil Burk
Browse files

aaudio example: print timestamps during callbacks. 

Bug: 63918065
Test: this is a test
Change-Id: Id25dd36764761583986d3ce29f7d82032ec4539f
parent cda5c070

media/libaaudio/examples/utils/AAudioSimplePlayer.h

+20 −0
Original line number Diff line number Diff line
@@ -36,6 +36,13 @@ 
// How long to sleep in a callback to cause an intentional glitch. For testing.

#define FORCED_UNDERRUN_SLEEP_MICROS     (10 * 1000)



#define MAX_TIMESTAMPS   16



typedef struct Timestamp {

    int64_t position;

    int64_t nanoseconds;

} Timestamp;



/**

 * Simple wrapper for AAudio that opens an output stream either in callback or blocking write mode.

 */
@@ -227,10 +234,12 @@ typedef struct SineThreadedData_s { 


    SineGenerator  sineOsc1;

    SineGenerator  sineOsc2;

    Timestamp      timestamps[MAX_TIMESTAMPS];

    int64_t        framesTotal = 0;

    int64_t        nextFrameToGlitch = FORCED_UNDERRUN_PERIOD_FRAMES;

    int32_t        minNumFrames = INT32_MAX;

    int32_t        maxNumFrames = 0;

    int32_t        timestampCount = 0; // in timestamps



    int            scheduler = 0;

    bool           schedulerChecked = false;
@@ -273,6 +282,17 @@ aaudio_data_callback_result_t SimplePlayerDataCallbackProc( 
        sineData->schedulerChecked = true;

    }



    if (sineData->timestampCount < MAX_TIMESTAMPS) {

        Timestamp *timestamp = &sineData->timestamps[sineData->timestampCount];

        aaudio_result_t result = AAudioStream_getTimestamp(stream,

            CLOCK_MONOTONIC, &timestamp->position, &timestamp->nanoseconds);

        if (result == AAUDIO_OK && // valid?

                (sineData->timestampCount == 0 || // first one?

                (timestamp->position != (timestamp - 1)->position))) { // advanced position?

            sineData->timestampCount++; // keep this one

        }

    }



    if (numFrames > sineData->maxNumFrames) {

        sineData->maxNumFrames = numFrames;

    }

media/libaaudio/examples/write_sine/src/write_sine_callback.cpp

+12 −0
Original line number Diff line number Diff line
@@ -120,6 +120,18 @@ static aaudio_result_t testOpenPlayClose(AAudioArgsParser &argParser) 
        goto error;

    }



    for (int i = 0; i < myData.timestampCount; i++) {

        Timestamp *timestamp = &myData.timestamps[i];

        bool retro = (i > 0 &&

                      ((timestamp->position < (timestamp - 1)->position)

                       || ((timestamp->nanoseconds < (timestamp - 1)->nanoseconds))));

        const char *message = retro ? "  <= RETROGRADE!" : "";

        printf("Timestamp %3d : %8lld, %8lld %s\n", i,

               (long long) timestamp->position,

               (long long) timestamp->nanoseconds,

               message);

    }



    if (myData.schedulerChecked) {

        printf("scheduler = 0x%08x, SCHED_FIFO = 0x%08X\n",

               myData.scheduler,