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Commit 599ff6a1 authored by Myles Watson's avatar Myles Watson Committed by Automerger Merge Worker
Browse files

Merge "Fix A2dp encoder counter deviation." am: 7430f622 am: 1386d538 

Original change: https://android-review.googlesource.com/c/platform/system/bt/+/1506815

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Iddfd233a07b9dc1f7cfafdc5a1aefbcee5bf52b9
parents e21037d2 1386d538

system/stack/a2dp/a2dp_aac_encoder.cc

+14 −27
Original line number Diff line number Diff line
@@ -56,9 +56,9 @@ typedef struct { 
} tA2DP_AAC_ENCODER_PARAMS;



typedef struct {

  uint32_t counter;

  uint32_t bytes_per_tick;              // pcm bytes read each media task tick

  uint64_t last_frame_timestamp_100ns;  // values in 1/10 microseconds

  float counter;

  uint32_t bytes_per_tick; /* pcm bytes read each media task tick */

  uint64_t last_frame_us;

} tA2DP_AAC_FEEDING_STATE;



typedef struct {
@@ -517,7 +517,7 @@ void a2dp_aac_feeding_reset(void) { 
}



void a2dp_aac_feeding_flush(void) {

  a2dp_aac_encoder_cb.aac_feeding_state.counter = 0;

  a2dp_aac_encoder_cb.aac_feeding_state.counter = 0.0f;

}



uint64_t a2dp_aac_get_encoder_interval_ms(void) {
@@ -555,29 +555,16 @@ static void a2dp_aac_get_num_frame_iteration(uint8_t* num_of_iterations, 
      a2dp_aac_encoder_cb.feeding_params.bits_per_sample / 8;

  LOG_VERBOSE("%s: pcm_bytes_per_frame %u", __func__, pcm_bytes_per_frame);



  uint32_t hecto_ns_this_tick = a2dp_aac_encoder_interval_ms * 10000;

  uint64_t* last_100ns =

      &a2dp_aac_encoder_cb.aac_feeding_state.last_frame_timestamp_100ns;

  uint64_t now_100ns = timestamp_us * 10;

  if (*last_100ns != 0) {

    hecto_ns_this_tick = (now_100ns - *last_100ns);

  }

  *last_100ns = now_100ns;



  uint32_t bytes_this_tick =

      a2dp_aac_encoder_cb.aac_feeding_state.bytes_per_tick *

      hecto_ns_this_tick / (a2dp_aac_encoder_interval_ms * 10000);

  a2dp_aac_encoder_cb.aac_feeding_state.counter += bytes_this_tick;

  // Without this erratum, there was a three microseocnd shift per tick which

  // would cause one frame mismatched after every 180 seconds

  uint32_t erratum_100ns =

      ceil(1.0f * bytes_this_tick * a2dp_aac_encoder_interval_ms * 10000 /

           a2dp_aac_encoder_cb.aac_feeding_state.bytes_per_tick);

  if (erratum_100ns < hecto_ns_this_tick) {

    LOG_VERBOSE("%s: hecto_ns_this_tick=%d, bytes=%d, erratum_100ns=%d",

                __func__, hecto_ns_this_tick, bytes_this_tick, erratum_100ns);

    *last_100ns -= hecto_ns_this_tick - erratum_100ns;

  }

  uint32_t us_this_tick = A2DP_AAC_ENCODER_INTERVAL_MS * 1000;

  uint64_t now_us = timestamp_us;

  if (a2dp_aac_encoder_cb.aac_feeding_state.last_frame_us != 0)

    us_this_tick =

        (now_us - a2dp_aac_encoder_cb.aac_feeding_state.last_frame_us);

  a2dp_aac_encoder_cb.aac_feeding_state.last_frame_us = now_us;



  a2dp_aac_encoder_cb.aac_feeding_state.counter +=

      (float)a2dp_aac_encoder_cb.aac_feeding_state.bytes_per_tick * us_this_tick /

      (A2DP_AAC_ENCODER_INTERVAL_MS * 1000);



  result = a2dp_aac_encoder_cb.aac_feeding_state.counter / pcm_bytes_per_frame;

  a2dp_aac_encoder_cb.aac_feeding_state.counter -= result * pcm_bytes_per_frame;

system/stack/a2dp/a2dp_sbc_encoder.cc

+13 −27
Original line number Diff line number Diff line
@@ -71,9 +71,9 @@ typedef struct { 
  uint32_t aa_frame_counter;

  int32_t aa_feed_counter;

  int32_t aa_feed_residue;

  uint32_t counter;

  uint32_t bytes_per_tick;              // pcm bytes read each media task tick

  uint64_t last_frame_timestamp_100ns;  // values in 1/10 microseconds

  float counter;

  uint32_t bytes_per_tick; /* pcm bytes read each media task tick */

  uint64_t last_frame_us;

} tA2DP_SBC_FEEDING_STATE;



typedef struct {
@@ -389,7 +389,7 @@ void a2dp_sbc_feeding_reset(void) { 
}



void a2dp_sbc_feeding_flush(void) {

  a2dp_sbc_encoder_cb.feeding_state.counter = 0;

  a2dp_sbc_encoder_cb.feeding_state.counter = 0.0f;

  a2dp_sbc_encoder_cb.feeding_state.aa_feed_residue = 0;

}
@@ -429,29 +429,15 @@ static void a2dp_sbc_get_num_frame_iteration(uint8_t* num_of_iterations, 
      a2dp_sbc_encoder_cb.feeding_params.bits_per_sample / 8;

  LOG_VERBOSE("%s: pcm_bytes_per_frame %u", __func__, pcm_bytes_per_frame);



  uint32_t hecto_ns_this_tick = A2DP_SBC_ENCODER_INTERVAL_MS * 10000;

  uint64_t* last_100ns =

      &a2dp_sbc_encoder_cb.feeding_state.last_frame_timestamp_100ns;

  uint64_t now_100ns = timestamp_us * 10;

  if (*last_100ns != 0) {

    hecto_ns_this_tick = (now_100ns - *last_100ns);

  }

  *last_100ns = now_100ns;



  uint32_t bytes_this_tick = a2dp_sbc_encoder_cb.feeding_state.bytes_per_tick *

                             hecto_ns_this_tick /

                             (A2DP_SBC_ENCODER_INTERVAL_MS * 10000);

  a2dp_sbc_encoder_cb.feeding_state.counter += bytes_this_tick;

  // Without this erratum, there was a three microseocnd shift per tick which

  // would cause one SBC frame mismatched after every 20 seconds

  uint32_t erratum_100ns =

      ceil(1.0f * A2DP_SBC_ENCODER_INTERVAL_MS * 10000 * bytes_this_tick /

           a2dp_sbc_encoder_cb.feeding_state.bytes_per_tick);

  if (erratum_100ns < hecto_ns_this_tick) {

    LOG_VERBOSE("%s: hecto_ns_this_tick=%d, bytes=%d, erratum_100ns=%d",

                __func__, hecto_ns_this_tick, bytes_this_tick, erratum_100ns);

    *last_100ns -= hecto_ns_this_tick - erratum_100ns;

  }

  uint32_t us_this_tick = A2DP_SBC_ENCODER_INTERVAL_MS * 1000;

  uint64_t now_us = timestamp_us;

  if (a2dp_sbc_encoder_cb.feeding_state.last_frame_us != 0)

    us_this_tick = (now_us - a2dp_sbc_encoder_cb.feeding_state.last_frame_us);

  a2dp_sbc_encoder_cb.feeding_state.last_frame_us = now_us;



  a2dp_sbc_encoder_cb.feeding_state.counter +=

      (float)a2dp_sbc_encoder_cb.feeding_state.bytes_per_tick * us_this_tick /

      (A2DP_SBC_ENCODER_INTERVAL_MS * 1000);



  /* Calculate the number of frames pending for this media tick */

  projected_nof =

system/stack/a2dp/a2dp_vendor_ldac_encoder.cc

+4 −4
Original line number Diff line number Diff line
@@ -124,7 +124,7 @@ typedef struct { 
} tA2DP_LDAC_ENCODER_PARAMS;



typedef struct {

  uint32_t counter;

  float counter;

  uint32_t bytes_per_tick; /* pcm bytes read each media task tick */

  uint64_t last_frame_us;

} tA2DP_LDAC_FEEDING_STATE;
@@ -528,7 +528,7 @@ void a2dp_vendor_ldac_feeding_reset(void) { 
}



void a2dp_vendor_ldac_feeding_flush(void) {

  a2dp_ldac_encoder_cb.ldac_feeding_state.counter = 0;

  a2dp_ldac_encoder_cb.ldac_feeding_state.counter = 0.0f;

}



uint64_t a2dp_vendor_ldac_get_encoder_interval_ms(void) {
@@ -587,8 +587,8 @@ static void a2dp_ldac_get_num_frame_iteration(uint8_t* num_of_iterations, 
  a2dp_ldac_encoder_cb.ldac_feeding_state.last_frame_us = now_us;



  a2dp_ldac_encoder_cb.ldac_feeding_state.counter +=

      a2dp_ldac_encoder_cb.ldac_feeding_state.bytes_per_tick * (us_this_tick /

      (float) (A2DP_LDAC_ENCODER_INTERVAL_MS * 1000));

      (float)a2dp_ldac_encoder_cb.ldac_feeding_state.bytes_per_tick * us_this_tick /

      (A2DP_LDAC_ENCODER_INTERVAL_MS * 1000);



  result =

      a2dp_ldac_encoder_cb.ldac_feeding_state.counter / pcm_bytes_per_frame;