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preliminary version: includes only extractor constants so far

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@985 a95241bf-73f2-0310-859d-f6bbb57e9c96
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shatty 2002-09-05 09:21:41 +00:00
parent 5975e64850
commit 0dd4de176e
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78
headers/private/media/experimental/ParameterWeb.txt Normal file
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This file contains extensions to the standard set of parameter web constants.
/* constants for extractors */
extern _IMPEXP_MEDIA const char * const B_DURATION;
// Output only: Selects the duration of the stream.
//
// This is the playing time of the stream, which may be
// different from some or all of the durations for the
// individual streams. Return a negative number if the
// duration is not a useful number. (like streaming audio)
// This duration may be an estimate because determining
// the exact duration may require parsing an entire file.
// This duration may also be updated over time. For
// example, a file being read may also be being written to
// by someone else.
extern _IMPEXP_MEDIA const char * const B_MEDIA_COPYRIGHT;
// Output only: Selects the copyright notice of the stream.
//
// This is a string with a copyright notice. The
// string belongs to the extractor, so don't delete
// or change it.
extern _IMPEXP_MEDIA const char * const B_MEDIA_TRACK_COUNT;
// Output only: Selects the count of the
// number of tracks in the stream.
//
// This is the current number of tracks in the stream.
extern _IMPEXP_MEDIA const char * const B_MEDIA_FRAME_COUNT;
// Output only: Selects the count of the
// number of frames in the stream.
//
// This is the current number of frames in the stream.
// See BMediaTrack::CountFrames()
extern _IMPEXP_MEDIA const char * const B_MEDIA_CURRENT_FRAME_INDEX;
// Output only: Selects the index of the
// current frame in the stream.
//
// This is the current frame in the stream.
// See BMediaTrack::CurrentFrame()
extern _IMPEXP_MEDIA const char * const B_MEDIA_CURRENT_TIME;
// Output only: Selects the current time of the stream.
//
// This is the time at the current position of the stream.
// See BMediaTrack::CurrentTime()
extern _IMPEXP_MEDIA const char * const B_MEDIA_ENCODED_FORMAT;
// Output only: Selects the native encoded format of the streams data.
//
// See BMediaTrack::EncodedFormat()
extern _IMPEXP_MEDIA const char * const B_MEDIA_TRACK_CODEC_INFO;
// Output only: Selects the codec information for this stream
//
// See BMediaTrack::GetCodecInfo()
extern _IMPEXP_MEDIA const char * const B_MEDIA_QUALITY;
// Input/output: Selects the quality rating for this stream
//
// See BMediaTrack::GetQuality and BMediaTrack::SetQuality
// Used for extractor-based seek:
extern _IMPEXP_MEDIA const char * const B_MEDIA_SEEK_STREAM_NUMBER;
// Input/Output: Selects the stream to be selected for seeking.
//
// When the extractor is asked to seek, it will seek on
// this stream, and then seek the other streams depending
// on where it ends up on the first stream. A typical
// value for this corresponds to a video stream. In this
// case the video stream will be seeked to the closest key
// frame for example, and then any other streams will be
// seeked to that time. Only 'open' streams will be
// seeked.