note
	description: "An AUDIO_SOUND used to stream audio buffers"
	author: "Louis Marchand"
	date: "Fri, 16 Jun 2017 16:13:44 +0000"
	revision: "0.1"

class interface
	AUDIO_SOUND_STREAMING

create 
	make

feature --Access

	playing_queue: QUEUE [MANAGED_POINTER]
			-- Every buffer to play.

	finish
			-- Terminate the streaming (after emptying playing_queue)

	queue_buffer (a_buffer: MANAGED_POINTER)
			-- Add a_buffer os size a_size in the playing queue

	Is_openable: BOOLEAN = True
			-- Can Current be open

	open
			-- Do nothing

	close
			-- Do nothing

	channel_count: INTEGER_32
			-- Get the channel number of Current (1=mono, 2=stereo, etc.).

	frequency: INTEGER_32
			-- Get the frequency (sample rate) of Current.

	bits_per_sample: INTEGER_32
			-- Get the bit resolution of one frame of Current.

	is_signed: BOOLEAN
			-- True if the frames in the buffer are signed.

	Is_seekable: BOOLEAN = False
			-- Return true if Current support the seek functionnality.

	sample_position: INTEGER_64
			-- The number of frames since the beginning of Current

	restart
			-- Can be use to unfinished Current

	sample_seek (a_frame_number: INTEGER_64)
			-- Seek at the frame a_frame_number from the beginning of Current

	Sample_count: INTEGER_64 = 0
			-- Impossible to calculate
	
feature -- Implementation

	already_used_buffer: INTEGER_32
			-- The number of byte already used in the top item of playing_queue

	must_finish: BOOLEAN
			-- The finish has been called
	
invariant
	already_used_buffer_valid: already_used_buffer > 0 implies playing_queue.count > 0

end -- class AUDIO_SOUND_STREAMING

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