音が出るまで、のこと 最後 その２

最後のつもりだったのですが、条件によってはやっぱり音がぶつ切れになります(￣▽￣)

再生バッファへの書き込みは20msごとに行っていますが、ログを表示させると…

Boot :  QDateTime("2014-04-26 09:38:58.542 JST Qt::LocalTime") 
Assertion SUCCESS : brynhildr.cpp : LINE : 253
[control] Connected for control.
[graphics] Connected for graphics.
[sound] Connected for sound.
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 13312 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 5632 : len = 7680
[sound Buffer] get(int len) : size = 5888 : len = 7680
[sound Buffer] get(int len) : size = 3840 : len = 7680
[sound Buffer] get(int len) : size = 5632 : len = 7680
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 9728 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 2048 : len = 7680
[sound Buffer] get(int len) : size = 5632 : len = 7680
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 3840 : len = 7680
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 11520 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 3840 : len = 7680
[sound Buffer] get(int len) : size = 3840 : len = 7680
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 5888 : len = 7680
[sound] stop : ActiveState
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 5632 : len = 7680
[sound] stop : ActiveState
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 9728 : len = 7680

再生バッファへの書き込み時のバッファに置かれたデータサイズがsize、要求されているサイズがlenで出力されています。ことごとく要求されているデータサイズを下回っており、データ量が不足して再生処理が停止している（IdleStateに状態が遷移している）ようです。ActiveになったりIdleになったりを繰り返して、結果、音がぶつ切れになっているようです。

書き込みタイミングを40msに広げてみます。

Boot :  QDateTime("2014-04-26 09:47:30.709 JST Qt::LocalTime") 
Assertion SUCCESS : brynhildr.cpp : LINE : 253
[control] Connected for control.
[graphics] Connected for graphics.
[sound] Connected for sound.
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 23040 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 15360 : len = 7680
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound Buffer] get(int len) : size = 11520 : len = 7680
[sound Buffer] get(int len) : size = 3840 : len = 7680
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound Buffer] get(int len) : size = 13312 : len = 7680
[sound Buffer] get(int len) : size = 5632 : len = 7680
[sound Buffer] get(int len) : size = 2048 : len = 7680
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 5632 : len = 7680
[sound] stop : ActiveState
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 9728 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 2048 : len = 7680
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 9472 : len = 7680
[sound Buffer] get(int len) : size = 1792 : len = 7680
[sound Buffer] get(int len) : size = 5888 : len = 7680
[sound Buffer] get(int len) : size = 9472 : len = 7680
[sound Buffer] get(int len) : size = 1792 : len = 7680
[sound Buffer] get(int len) : size = 5888 : len = 7680
[sound Buffer] get(int len) : size = 9472 : len = 7680
[sound Buffer] get(int len) : size = 1792 : len = 7680
[sound Buffer] get(int len) : size = 9728 : len = 7680
[sound Buffer] get(int len) : size = 2048 : len = 7680
[sound Buffer] get(int len) : size = 5632 : len = 7680
[sound Buffer] get(int len) : size = 2048 : len = 7680
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 20992 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 13312 : len = 7680

ややリングバッファが満たされるようになり、IdleStateに落ちることも少なくはなっているようです。が、やはり再生バッファがemptyとなり、しばしばIdleStateに落ちているようです。これでは音がブツブツと切れます。理想的にはIdleStateに落ちることなく、バッファを書き込んでいきたいのです。

さらに60msに広げてみます。

Boot :  QDateTime("2014-04-26 10:05:16.384 JST Qt::LocalTime") 
Assertion SUCCESS : brynhildr.cpp : LINE : 253
[control] Connected for control.
[graphics] Connected for graphics.
[sound] Connected for sound.
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 20992 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 13312 : len = 7680
[sound Buffer] get(int len) : size = 5632 : len = 7680
[sound Buffer] get(int len) : size = 11520 : len = 7680
[sound Buffer] get(int len) : size = 3840 : len = 7680
[sound Buffer] get(int len) : size = 9728 : len = 7680
[sound Buffer] get(int len) : size = 2048 : len = 7680
[sound Buffer] get(int len) : size = 15360 : len = 7680
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound Buffer] get(int len) : size = 11520 : len = 7680
[sound Buffer] get(int len) : size = 3840 : len = 7680
[sound Buffer] get(int len) : size = 15360 : len = 7680
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound Buffer] get(int len) : size = 15360 : len = 7680
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound Buffer] get(int len) : size = 15360 : len = 7680
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound Buffer] get(int len) : size = 9472 : len = 7680
[sound Buffer] get(int len) : size = 1792 : len = 7680
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 13568 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 5888 : len = 7680
[sound Buffer] get(int len) : size = 3840 : len = 7680
[sound Buffer] get(int len) : size = 11520 : len = 7680
[sound Buffer] get(int len) : size = 3840 : len = 7680
[sound Buffer] get(int len) : size = 11520 : len = 7680
[sound Buffer] get(int len) : size = 3840 : len = 7680
[sound Buffer] get(int len) : size = 5632 : len = 7680
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 19200 : len = 7680

少し聴きやすくなりました。IdleStateになる状況も少なくなりました。

さらに80msに広げてみます。

Boot :  QDateTime("2014-04-26 10:08:15.637 JST Qt::LocalTime") 
Assertion SUCCESS : brynhildr.cpp : LINE : 253
[control] Connected for control.
[graphics] Connected for graphics.
[sound] Connected for sound.
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 26880 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 19200 : len = 7680
[sound Buffer] get(int len) : size = 11520 : len = 7680
[sound Buffer] get(int len) : size = 3840 : len = 7680
[sound Buffer] get(int len) : size = 15360 : len = 7680
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 20992 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 13312 : len = 7680
[sound Buffer] get(int len) : size = 5632 : len = 7680
[sound Buffer] get(int len) : size = 17408 : len = 7680
[sound Buffer] get(int len) : size = 9728 : len = 7680
[sound Buffer] get(int len) : size = 2048 : len = 7680
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 13312 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 5632 : len = 7680
[sound Buffer] get(int len) : size = 9728 : len = 7680
[sound Buffer] get(int len) : size = 2048 : len = 7680
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 15360 : len = 7680
[sound] stop : ActiveState
[sound Buffer] get(int len) : size = 7680 : len = 7680
[sound] stop : IdleState
[sound Buffer] get(int len) : size = 17152 : len = 7680
[sound] stop : ActiveState

う、IdleStateが増えました。単純に間隔を開ければデータは沢山バッファリングできますが、今度は再生バッファが空になりやすくなりました。これって通信速度にも影響されるのではないでしょうか…