The Media Demuxer APIs provides functions for demuxing media data.

Required Header

#include <mediademuxer.h>

Overview

MEDIADEMUXER API allows :
1) To extract elementary audio, video or text data from a multiplexed stream
2) To choose one or multiple desired stream to extract.
3) To choose the local or remote input source.
4) To create single or multiple instances of media demuxer. One instance can demux only one
input stream
5) To demux all the popular media formats such as MP4, AAC-NB, AAC-WB, MP3 etc.
6) To extract elementary media sample information, such as timestamp, sample size, key-frame(I-frame) etc.
7) To identify encrypted format
8) To seek to a different position-forward or backward- while extracting

Typical Call Flow of mediamuxer APIs is:

mediademuxer_create()
mediademuxer_set_data_source()
mediademuxer_prepare()
mediademuxer_get_track_count()
mediademuxer_select_track()
mediademuxer_start()
mediademuxer_get_track_info()
while (!EOS) {
    if (track1 is set) {
        mediademuxer_read_sample(track1);
        if (seek is requested)
            mediademuxer_seek();
    } else if (track2 is set) {
         mediademuxer_read_sample(track2);
    }
    if (track2 is not needed anymore)
        mediademuxer_unselect_track(track2);
}
mediademuxer_stop()
mediademuxer_unprepare()
mediademuxer_destroy()

Functions
int	mediademuxer_create (mediademuxer_h *demuxer)
	Creates a media demuxer handle for demuxing.
int	mediademuxer_set_data_source (mediademuxer_h demuxer, const char *path)
	Sets the source path of input stream.
int	mediademuxer_prepare (mediademuxer_h demuxer)
	Prepares the media demuxer for demuxing.
int	mediademuxer_get_track_count (mediademuxer_h demuxer, int *count)
	Gets the total track count present in the container stream.
int	mediademuxer_select_track (mediademuxer_h demuxer, int track_index)
	Selects the track to be performed.
int	mediademuxer_start (mediademuxer_h demuxer)
	Starts the media demuxer.
int	mediademuxer_get_track_info (mediademuxer_h demuxer, int track_index, media_format_h *format)
	Retrieves the track format of the read sample.
int	mediademuxer_read_sample (mediademuxer_h demuxer, int track_index, media_packet_h *outbuf)
	Reads a frame(sample) of one single track.
int	mediademuxer_seek (mediademuxer_h demuxer, int64_t pos)
	Seeks to a particular instance of time (in milli seconds).
int	mediademuxer_unselect_track (mediademuxer_h demuxer, int track_index)
	Unselects the selected track.
int	mediademuxer_stop (mediademuxer_h demuxer)
	Stops the media demuxer.
int	mediademuxer_unprepare (mediademuxer_h demuxer)
	Resets the media demuxer.
int	mediademuxer_destroy (mediademuxer_h demuxer)
	Removes the instance of media demuxer and clear all its context memory.
int	mediademuxer_get_state (mediademuxer_h demuxer, mediademuxer_state *state)
	Gets media demuxer state.
int	mediademuxer_set_error_cb (mediademuxer_h demuxer, mediademuxer_error_cb callback, void *user_data)
	Sets an error callback function to be invoked when an error occurs.
int	mediademuxer_unset_error_cb (mediademuxer_h demuxer)
	Unsets the error callback function.
int	mediademuxer_set_eos_cb (mediademuxer_h demuxer, mediademuxer_eos_cb callback, void *user_data)
	Sets an eos callback function to be invoked when an eos occurs.
int	mediademuxer_unset_eos_cb (mediademuxer_h demuxer)
	Unsets the eos callback function.
Typedefs
typedef struct mediademuxer_s *	mediademuxer_h
	Media Demuxer handle type.
typedef void(*	mediademuxer_error_cb )(mediademuxer_error_e error, void *user_data)
	Called when error occurs in media demuxer.
typedef void(*	mediademuxer_eos_cb )(int track_num, void *user_data)
	Called when end of stream occurs in media demuxer.

Typedef Documentation

typedef void(* mediademuxer_eos_cb)(int track_num, void *user_data)

Called when end of stream occurs in media demuxer.

Since :: 3.0

Parameters:

[in]	track_num	The track_num which indicate eos for which track number occurred
[in]	user_data	The user data passed from the code where mediademuxer_set_eos_cb() was invoked This data will be accessible from mediademuxer_eos_cb()

Precondition:: Create media demuxer handle by calling mediademuxer_create() function.

See also:: mediademuxer_set_eos_cb(); mediademuxer_unset_eos_cb()

typedef void(* mediademuxer_error_cb)(mediademuxer_error_e error, void *user_data)

Called when error occurs in media demuxer.

Following error codes can be delivered. MEDIADEMUXER_ERROR_INVALID_OPERATION, MEDIADEMUXER_ERROR_NOT_SUPPORTED, MEDIADEMUXER_ERROR_INVALID_PATH, MEDIADEMUXER_ERROR_RESOURCE_LIMIT, MEDIADEMUXER_ERROR_SEEK_FAILED, MEDIADEMUXER_ERROR_DRM_NOT_PERMITTED

Since :: 3.0

Parameters:

[in]	error	The error that occurred in media demuxer
[in]	user_data	The user data passed from the code where mediademuxer_set_error_cb() was invoked This data will be accessible from mediademuxer_error_cb()

Precondition:: Create media demuxer handle by calling mediademuxer_create() function.

See also:: mediademuxer_set_error_cb(); mediademuxer_unset_error_cb()

typedef struct mediademuxer_s* mediademuxer_h

Media Demuxer handle type.

Since :: 3.0

Enumeration Type Documentation

enum mediademuxer_error_e

Enumeration for media demuxer error.

Since :: 3.0

Enumerator:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_OUT_OF_MEMORY	Out of memory
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid operation
MEDIADEMUXER_ERROR_NOT_SUPPORTED	Not supported
MEDIADEMUXER_ERROR_PERMISSION_DENIED	Permission denied
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state
MEDIADEMUXER_ERROR_INVALID_PATH	Invalid path
MEDIADEMUXER_ERROR_RESOURCE_LIMIT	Resource limit
MEDIADEMUXER_ERROR_SEEK_FAILED	Seek operation failure
MEDIADEMUXER_ERROR_DRM_NOT_PERMITTED	Not permitted format

enum mediademuxer_state

Enumeration for media demuxer state.

Since :: 3.0

Enumerator:

MEDIADEMUXER_STATE_NONE	The mediademuxer is not created
MEDIADEMUXER_STATE_IDLE	The mediademuxer is created, but not prepared
MEDIADEMUXER_STATE_READY	The mediademuxer is ready to demux media
MEDIADEMUXER_STATE_DEMUXING	The mediademuxer is demuxing media

Function Documentation

int mediademuxer_create ( mediademuxer_h * demuxer )

Creates a media demuxer handle for demuxing.

Since :: 3.0

Remarks:: You must release demuxer using mediademuxer_destroy() function.

Parameters:

[out] demuxer A new handle to media demuxer

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid Operation
MEDIADEMUXER_ERROR_OUT_OF_MEMORY	Out of memory
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter

Postcondition:: The media demuxer state will be MEDIADEMUXER_STATE_IDLE.

See also:: mediademuxer_destroy()

int mediademuxer_destroy ( mediademuxer_h demuxer )

Removes the instance of media demuxer and clear all its context memory.

Since :: 3.0

Parameters:

[in] demuxer The media demuxer handle

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid Operation

Precondition:: Create a media demuxer handle by calling mediademuxer_create() function.

Postcondition:: The media demuxer state will be MEDIADEMUXER_STATE_NONE.

See also:: mediademuxer_create()

int mediademuxer_get_state	(	mediademuxer_h	demuxer,
		mediademuxer_state *	state
	)

Gets media demuxer state.

Since :: 3.0

Parameters:

[in]	demuxer	The media demuxer handle
[out]	state	The media demuxer sate

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: Create a media demuxer handle by calling mediademuxer_create() function.

See also:: mediademuxer_state

int mediademuxer_get_track_count	(	mediademuxer_h	demuxer,
		int *	count
	)

Gets the total track count present in the container stream.

Since :: 3.0

Parameters:

[in]	demuxer	The media demuxer handle
[out]	count	The number of tracks present

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid Operation

Precondition:: The media demuxer state should be MEDIADEMUXER_STATE_READY.

See also:: mediademuxer_prepare(); mediademuxer_select_track()

int mediademuxer_get_track_info	(	mediademuxer_h	demuxer,
		int	track_index,
		media_format_h *	format
	)

Retrieves the track format of the read sample.

Since :: 3.0

Remarks:: The format should be released using media_format_unref() function.

Parameters:

[in]	demuxer	The media demuxer handle
[in]	track_index	The index of the track
[out]	format	The media format handle

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid Operation

Precondition:: The media demuxer state must be set to MEDIADEMUXER_STATE_DEMUXING by calling mediademuxer_start() or set to MEDIADEMUXER_STATE_READY by calling mediademuxer_prepare().

See also:: mediademuxer_get_track_count(); mediademuxer_select_track(); media_format_unref(); media_format_h

int mediademuxer_prepare ( mediademuxer_h demuxer )

Prepares the media demuxer for demuxing.

Since :: 3.0

Remarks:: User should call this before mediademuxer_start() function.

Parameters:

[in] demuxer The media demuxer handle

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid Operation

Precondition:: The media demuxer state should be MEDIADEMUXER_STATE_IDLE.; mediademuxer_set_error_cb() should be called before mediademuxer_prepare().

Postcondition:: The media demuxer state will be MEDIADEMUXER_STATE_READY.

See also:: mediademuxer_set_data_source(); mediademuxer_unprepare()

int mediademuxer_read_sample	(	mediademuxer_h	demuxer,
		int	track_index,
		media_packet_h *	outbuf
	)

Reads a frame(sample) of one single track.

Since :: 3.0

Remarks:: The outbuf should be released using media_packet_unref() function.; Once this function is called, user app can call the mediatool APIs to extract side information such as pts, size, duration, flags etc.

Parameters:

[in]	demuxer	The media demuxer handle
[in]	track_index	The index of track of which data is needed
[out]	outbuf	The media packet handle

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid Operation

Precondition:: The media demuxer state should be MEDIADEMUXER_STATE_DEMUXING.

See also:: mediademuxer_start(); mediademuxer_get_track_info(); mediademuxer_seek() if need to seek to a particular location; mediademuxer_unselect_track(); mediademuxer_stop(); media_packet_unref(); media_packet_h

int mediademuxer_seek	(	mediademuxer_h	demuxer,
		int64_t	pos
	)

Seeks to a particular instance of time (in milli seconds).

Since :: 3.0

Remarks:: If mediademuxer_seek() is followed by mediademuxer_read_sample(), outbuf will be the key frame right before the seek position.

Parameters:

[in]	demuxer	The media demuxer handle
[in]	pos	The value of the new start position

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid Operation

Precondition:: The media demuxer state should be MEDIADEMUXER_STATE_DEMUXING.

See also:: mediademuxer_read_sample(); mediademuxer_stop()

int mediademuxer_select_track	(	mediademuxer_h	demuxer,
		int	track_index
	)

Selects the track to be performed.

Since :: 3.0

Parameters:

[in]	demuxer	The media demuxer handle
[in]	track_index	The track index on which is selected for read

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid Operation

Precondition:: The media demuxer state should be MEDIADEMUXER_STATE_READY.

See also:: mediademuxer_get_track_count(); mediademuxer_start()

int mediademuxer_set_data_source	(	mediademuxer_h	demuxer,
		const char *	path
	)

Sets the source path of input stream.

Since :: 3.0

Remarks:: The mediastorage privilege(http://tizen.org/privilege/mediastorage) should be added if any video/audio files are used to play located in the internal storage.; The externalstorage privilege(http://tizen.org/privilege/externalstorage) should be added if any video/audio files are used to play located in the external storage.; You must release demuxer using mediademuxer_destroy() function.

Parameters:

[in]	demuxer	The media demuxer handle
[in]	path	The content location, such as the file path

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid Operation
MEDIADEMUXER_ERROR_INVALID_PATH	Invalid path

Precondition:: The media demuxer state will be MEDIADEMUXER_STATE_IDLE by calling mediademuxer_create() function.

int mediademuxer_set_eos_cb	(	mediademuxer_h	demuxer,
		mediademuxer_eos_cb	callback,
		void *	user_data
	)

Sets an eos callback function to be invoked when an eos occurs.

Since :: 3.0

Parameters:

[in]	demuxer	The media demuxer handle
[in]	callback	Callback function pointer
[in]	user_data	The user data passed from the code where mediademuxer_set_eos_cb() was invoked This data will be accessible from mediademuxer_eos_cb()

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state

Precondition:: Create a media demuxer handle by calling mediademuxer_create() function.

Postcondition:: mediademuxer_eos_cb() will be invoked.

See also:: mediademuxer_unset_eos_cb(); mediademuxer_eos_cb()

int mediademuxer_set_error_cb	(	mediademuxer_h	demuxer,
		mediademuxer_error_cb	callback,
		void *	user_data
	)

Sets an error callback function to be invoked when an error occurs.

Since :: 3.0

Parameters:

[in]	demuxer	The media demuxer handle
[in]	callback	Callback function pointer
[in]	user_data	The user data passed from the code where mediademuxer_set_error_cb() was invoked This data will be accessible from mediademuxer_error_cb()

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state

Precondition:: Create a media demuxer handle by calling mediademuxer_create() function.

Postcondition:: mediademuxer_error_cb() will be invoked.

See also:: mediademuxer_unset_error_cb(); mediademuxer_error_cb()

int mediademuxer_start ( mediademuxer_h demuxer )

Starts the media demuxer.

Since :: 3.0

Remarks:: User should call this before mediademuxer_read_sample() function.

Parameters:

[in] demuxer The media demuxer handle

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid Operation

Precondition:: The media demuxer state should be MEDIADEMUXER_STATE_READY.

Postcondition:: The media demuxer state will be MEDIADEMUXER_STATE_DEMUXING.

See also:: mediademuxer_prepare(); mediademuxer_get_track_count(); mediademuxer_select_track(); mediademuxer_get_track_info()

int mediademuxer_stop ( mediademuxer_h demuxer )

Stops the media demuxer.

Since :: 3.0

Remarks:: User can call this if need to stop demuxing if needed.

Parameters:

[in] demuxer The media demuxer handle

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid Operation

Precondition:: The media demuxer state must be set to MEDIADEMUXER_STATE_DEMUXING.

Postcondition:: The media demuxer state will be in MEDIADEMUXER_STATE_READY.

See also:: mediademuxer_start(); mediademuxer_unprepare()

int mediademuxer_unprepare ( mediademuxer_h demuxer )

Resets the media demuxer.

Since :: 3.0

Remarks:: User should call this before mediademuxer_destroy() function.

Parameters:

[in] demuxer The media demuxer handle

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid Operation

Precondition:: The media demuxer state should be MEDIADEMUXER_STATE_READY.

Postcondition:: The media demuxer state will be MEDIADEMUXER_STATE_IDLE.

See also:: mediademuxer_prepare()

int mediademuxer_unselect_track	(	mediademuxer_h	demuxer,
		int	track_index
	)

Unselects the selected track.

Since :: 3.0

Parameters:

[in]	demuxer	The media demuxer handle
[in]	track_index	The track index to be unselected

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state
MEDIADEMUXER_ERROR_INVALID_OPERATION	Invalid Operation

Precondition:: The media demuxer state must be set to MEDIADEMUXER_STATE_DEMUXING by calling mediademuxer_read_sample() or set to MEDIADEMUXER_STATE_READY by calling mediademuxer_select_track().

See also:: mediademuxer_select_track(); mediademuxer_read_sample()

int mediademuxer_unset_eos_cb ( mediademuxer_h demuxer )

Unsets the eos callback function.

Since :: 3.0

Parameters:

[in] demuxer The media demuxer handle

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state

See also:: mediademuxer_eos_cb()

int mediademuxer_unset_error_cb ( mediademuxer_h demuxer )

Unsets the error callback function.

Since :: 3.0

Parameters:

[in] demuxer The media demuxer handle

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIADEMUXER_ERROR_NONE	Successful
MEDIADEMUXER_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIADEMUXER_ERROR_INVALID_STATE	Invalid state

See also:: mediademuxer_error_cb()

Required Header

Overview

Functions

Typedefs

Typedef Documentation

Enumeration Type Documentation

Function Documentation