_AM_AUDIO_RENDERER_STAT_PARAM
4/8/2010
The _AM_AUDIO_RENDERER_STAT_PARAM enumeration specifies which performance information to retrieve from the audio renderer.
This enumeration type is used in the IAMAudioRendererStats::GetStatParam method. Each enumeration member defines the meaning of the values that are returned in the pdwParam1 and pdwParam2 parameters of GetStatParam.
Syntax
enum _AM_AUDIO_RENDERER_STAT_PARAM {
AM_AUDREND_STAT_PARAM_BREAK_COUNT,
AM_AUDREND_STAT_PARAM_SLAVE_MODE,
AM_AUDREND_STAT_PARAM_SILENCE_DUR,
AM_AUDREND_STAT_PARAM_LAST_BUFFER_DUR,
AM_AUDREND_STAT_PARAM_DISCONTINUITIES,
AM_AUDREND_STAT_PARAM_SLAVE_RATE,
AM_AUDREND_STAT_PARAM_SLAVE_DROPWRITE_DUR,
AM_AUDREND_STAT_PARAM_SLAVE_HIGHLOWERROR,
AM_AUDREND_STAT_PARAM_SLAVE_LASTHIGHLOWERROR,
AM_AUDREND_STAT_PARAM_SLAVE_ACCUMERROR,
AM_AUDREND_STAT_PARAM_BUFFERFULLNESS,
AM_AUDREND_STAT_PARAM_JITTER,
};
Constants
| Member | Param1 | Param2 |
|---|---|---|
AM_AUDREND_STAT_PARAM_BREAK_COUNT Not Implemented |
The cumulative number of breaks in the audio stream. |
Not used. |
AM_AUDREND_STAT_PARAM_SLAVE_MODE Not Implemented |
Indicates the current rate matching mode. The value is a bitwise combination of the following: 0x00: No rate matching. 0x01: Match rates to a live source. 0x02: Match rates based on the rate of the incoming audio data. 0x04: Match rates with the filter graph's reference clock, when the clock is not provided by the audio renderer. 0x10: Match rates based on the time stamps of the audio samples. |
Not used. |
AM_AUDREND_STAT_PARAM_SILENCE_DUR |
The cumulative amount of silence the audio renderer has inserted, due to gaps in the time stamps of the incoming samples. The value is given in milliseconds. |
Not used. |
AM_AUDREND_STAT_PARAM_LAST_BUFFER_DUR |
The duration of the most recent audio buffer, in milliseconds. |
Not used. |
AM_AUDREND_STAT_PARAM_DISCONTINUITIES |
The cumulative number of discontinuities in the audio stream. |
Not used. |
AM_AUDREND_STAT_PARAM_SLAVE_RATE Not Implemented |
The sample rate that the audio renderer is matching, in samples per second. |
Not used. |
AM_AUDREND_STAT_PARAM_SLAVE_DROPWRITE_DUR Applies only when the Audio Renderer (WaveOut) filter is matching rates to a master clock. |
The amount of data dropped to stay in sync, in milliseconds. |
Not used. |
AM_AUDREND_STAT_PARAM_SLAVE_HIGHLOWERROR Valid only when the audio renderer is matching rates to a master clock. |
The highest difference noted between the audio renderer's clock and the clock it is trying to match. |
The lowest difference noted between the audio renderer's clock and the clock it is trying to match. |
AM_AUDREND_STAT_PARAM_SLAVE_LASTHIGHLOWERROR Valid only when the audio renderer is matching rates to a master clock. |
The last high error, in milliseconds. A high error occurs when the audio renderer falls behind the clock. |
The last low error, in milliseconds. A low error occurs when the audio renderer runs ahead of the clock. |
AM_AUDREND_STAT_PARAM_SLAVE_ACCUMERROR Valid only when the audio renderer is matching rates to another clock or a live source. |
The accumulated difference between the audio renderer and the master clock, including adjustments made by dropping samples or inserting gaps. |
Not used. |
AM_AUDREND_STAT_PARAM_BUFFERFULLNESS |
How much audio data is in the audio buffer, as a percentage. |
Not used. |
AM_AUDREND_STAT_PARAM_JITTER Not Implemented |
Not used. |
Not used. |
Requirements
| Header | dshow.h |
See Also
Reference
IAMAudioRendererStats::GetStatParam