Destructor Deletes all objects and releases all resource owned by this instance.

This function completes the composing operation. It frees the memory allocated by the library instance and closes the output file.

It is necessary to call this function before the output file is guaranteed to be a valid output file even though the file may exist prior to the call.

The composer can be reused again after this call, following another call to C3GPCompose::Open to re-initialise the composer.

If C3GPCompose::Complete is called before the composer is initialised, it will be ignored and KErrNone is returned.

Although during destruction of C3GPCompose, this function will be automatically called, and no error code will be returned. Therefore, when destroying the Composer object that you have used to compose a file, you should ensure that data is committed to the file by invoking C3GPCompose::Complete before destroying the Composer object.

Create an instance of 3GP composer using default buffer count and size.

The default values for buffer count and size are as follow: Write Buffer Size is 2048 Write Buffer Max Count is 15

Create an instance of 3GP composer, and let the user set a count limit and size of internal buffer for composition.

The default values for buffer count and size are as follow: Write Buffer Size is 2048 Write Buffer Max Count is 15

An increase of the buffer count and size will lead to a decrease of file I/O activities, thereby, improves the performance of the 3GP Composer at the expense of higher memory usage.

This function initialises the 3GP composer for writing 3GP/3G2/MP4 data into a file. Any combination of one video and one audio type is acceptable.

Note: Ownership of aVideo and aAudio remains with the caller. Both aVideo and aAudio are ready for deletion after C3GPCompose::Open returns.

This function initialises the 3GP composer for writing 3GP/3G2/MP4 data into a file. Any combination of one video and one audio type is acceptable.

Note: E3GPMetaDataLast will be defaulted in aFlags if file handle is used for the initialisation of the 3GP composer.

Note: Ownership of aVideo and aAudio remains with the caller. Both aVideo and aAudio are ready for deletion after C3GPCompose::Open returns.

This function initialises the 3GP composer for writing 3GP/3G2/MP4 data into a file. Any combination of one video and one audio type is acceptable.

Note: E3GPMetaDataLast will be defaulted in aFlags if file handle is used for the initialisation of the 3GP composer.

Note: Ownership of aVideo and aAudio remains with the caller. Both aVideo and aAudio are ready for deletion after C3GPCompose::Open returns.

Writes a buffer containing whole atom to inside of user data atom (UDTA) defined in aLocation.

The buffer should contain an atom of structure that conforms to the definition of a "full box" as specified in ISO/IEC 14496-12:2003: "Information technology Coding of audio-visual objects Part 12: ISO base media file format."

For more information on user data atoms, see Section 8 Asset Information of "3GPP TS 26.244 version 6.1.0 3GP file format (Rel 6)."

This function writes audio frames into the output file or buffer. The data is available in the 3GP output file only after calling C3GPCompose::Complete. C3GPCompose::Complete should be called exactly once when all audio and video data has been inserted into the library.

For MPEG-4 audio: This function writes one MPEG audio frame to the 3GP file.

For other audio types: This function writes a number of audio frames to the 3GP file specified during composer setup in the input parameter aAudio when calling C3GPCompose::Open. All audio frames inserted with one function call will be placed inside one sample in the resulting file.

Note: Only the last call can have a different number of frames if the number is less than the number of frames per sample specified during composer setup.

T3GPAudioPropertiesAmr T3GPAudioPropertiesQcelp

This function writes one video frame to the output file or buffer.

The frames must be inserted according to their causal sequence. Because the library doesn't analyze the video bit stream, frames are inserted into the 3GP file in the same order as they are entered with this function. Therefore, the frames will not be retrieved from the resulting 3GP file or buffer correctly if they are not in proper order.

A frame inserted with this function call will result in one 3GP sample and one 3GP chunk.

The current frame's dependency information which is using default values (E3GPDependencyUnknown & E3GPRedundancyUnknown) is inserted.

The data is available in the output file only after calling C3GPCompose::Complete. C3GPCompose::Complete should be called exactly once when all audio and video data has been inserted into the library.

This function sets the current frame's dependency information to SDTP box and writes one video frame to the output file.

The frames must be inserted according to their causal sequence. Because the library doesn't analyze the video bit stream, frames are inserted into the 3GP file in the same order as they are entered with this function. Therefore, the frames will not be retrieved from the resulting 3GP file or buffer correctly if they are not in proper order.

A frame inserted with this function call will result in one 3GP sample and one 3GP chunk.

The data is available in the output file only after calling C3GPCompose::Complete. C3GPCompose::Complete should be called exactly once when all audio and video data has been inserted into the library.