FfmpegAudioCursor

Inheritance:

Methods of FfmpegAudioCursor:

Methods of MovieAudioCursor:

Methods of TypedWritableReferenceCount:

Methods of TypedWritable:

Methods of TypedObject:

Methods of ReferenceCount:

getClassType
static TypeHandle FfmpegAudioCursor::get_class_type(void);

Undocumented function.

aborted
bool MovieAudioCursor::aborted(void) const;

Description: Returns true if the audio has aborted prematurely. For example, this could occur if the Movie was actually an internet TV station, and the connection was lost. Reaching the normal end of the audio does not constitute an 'abort' condition.

audioChannels
int MovieAudioCursor::audio_channels(void) const;

Description: Returns the number of audio channels (ie, two for stereo, one for mono).

audioRate
int MovieAudioCursor::audio_rate(void) const;

Description: Returns the audio sample rate.

canSeek
bool MovieAudioCursor::can_seek(void) const;

Description: Returns true if the movie can seek. If this is true, seeking is still not guaranteed to be fast: for some movies, seeking is implemented by rewinding to the beginning and then fast-forwarding to the desired location. Even if the movie cannot seek, the seek method can still advance to an arbitrary location by reading samples and discarding them. However, to move backward, can_seek must return true.

canSeekFast
bool MovieAudioCursor::can_seek_fast(void) const;

Description: Returns true if seek operations are constant time.

getClassType
static TypeHandle MovieAudioCursor::get_class_type(void);

Undocumented function.

getSource
PointerTo< MovieAudio > MovieAudioCursor::get_source(void) const;

Filename: movieAudioCursor.I Created by: jyelon (02Jul07)
PANDA 3D SOFTWARE Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
All use of this software is subject to the terms of the Panda 3d Software license. You should have received a copy of this license along with this source code; you will also find a current copy of the license at http://etc.cmu.edu/panda3d/docs/license/ .
To contact the maintainers of this program write to panda3d-general@lists.sourceforge.net .
Description: Returns the MovieAudio which this cursor references.

length
double MovieAudioCursor::length(void) const;

Description: Returns the length of the movie.
Some kinds of Movie, such as internet TV station, might not have a predictable length. In that case, the length will be set to a very large number: 1.0E10. If the internet TV station goes offline, the video or audio stream will set its abort flag. Reaching the end of the movie (ie, the specified length) normally does not cause the abort flag to be set.
The video and audio streams produced by get_video and get_audio are always of unlimited duration - you can always read another video frame or another audio sample. This is true even if the specified length is reached, or an abort is flagged. If either stream runs out of data, it will synthesize blank video frames and silent audio samples as necessary to satisfy read requests.
Some AVI files have incorrect length values encoded into them - usually, they're a second or two long or short. When playing such an AVI using the Movie class, you may see a slightly truncated video, or a slightly elongated video (padded with black frames). There are utilities out there to fix the length values in AVI files.

seek
virtual void MovieAudioCursor::seek(double offset);

Description: Skips to the specified offset within the file.
If the movie reports that it cannot seek, then this method can still advance by reading samples and discarding them. However, to move backward, can_seek must be true.
If the movie reports that it can_seek, it doesn't mean that it can do so quickly. It may have to rewind the movie and then fast forward to the desired location. Only if can_seek_fast returns true can seek operations be done in constant time.
Seeking may not be precise, because AVI files often have inaccurate indices. After seeking, tell will indicate that the cursor is at the target location. However, in truth, the data you read may come from a slightly offset location.

skipSamples
void MovieAudioCursor::skip_samples(int n);

Description: Skip audio samples from the stream. This is mostly for debugging purposes.

tell
double MovieAudioCursor::tell(void) const;

Description: Returns the current offset within the file.

getClassType
static TypeHandle TypedWritableReferenceCount::get_class_type(void);

Undocumented function.

getClassType
static TypeHandle TypedWritable::get_class_type(void);

Undocumented function.

getClassType
static TypeHandle TypedObject::get_class_type(void);

Undocumented function.

getType
virtual TypeHandle TypedObject::get_type(void) const = 0;

Derived classes should override this function to return get_class_type().

getTypeIndex
int TypedObject::get_type_index(void) const;

Description: Returns the internal index number associated with this object's TypeHandle, a unique number for each different type. This is equivalent to get_type().get_index().

isExactType
bool TypedObject::is_exact_type(TypeHandle handle) const;

Description: Returns true if the current object is the indicated type exactly.

isOfType
bool TypedObject::is_of_type(TypeHandle handle) const;

Description: Returns true if the current object is or derives from the indicated type.

getClassType
static TypeHandle ReferenceCount::get_class_type(void);

Undocumented function.

getRefCount
int ReferenceCount::get_ref_count(void) const;

Description: Returns the current reference count.

ref
void ReferenceCount::ref(void) const;

Description: Explicitly increments the reference count. User code should avoid using ref() and unref() directly, which can result in missed reference counts. Instead, let a PointerTo object manage the reference counting automatically.
This function is const, even though it changes the object, because generally fiddling with an object's reference count isn't considered part of fiddling with the object. An object might be const in other ways, but we still need to accurately count the number of references to it.

testRefCountIntegrity
bool ReferenceCount::test_ref_count_integrity(void) const;

Description: Does some easy checks to make sure that the reference count isn't completely bogus. Returns true if ok, false otherwise.

testRefCountNonzero
bool ReferenceCount::test_ref_count_nonzero(void) const;

Description: Does some easy checks to make sure that the reference count isn't zero, or completely bogus. Returns true if ok, false otherwise.

unref
bool ReferenceCount::unref(void) const;

Description: Explicitly decrements the reference count. Note that the object will not be implicitly deleted by unref() simply because the reference count drops to zero. (Having a member function delete itself is problematic; plus, we don't have a virtual destructor anyway.) However, see the helper function unref_delete().
User code should avoid using ref() and unref() directly, which can result in missed reference counts. Instead, let a PointerTo object manage the reference counting automatically.
This function is const, even though it changes the object, because generally fiddling with an object's reference count isn't considered part of fiddling with the object. An object might be const in other ways, but we still need to accurately count the number of references to it.
The return value is true if the new reference count is nonzero, false if it is zero.