Media processing method and media processing program

A non-transitory computer-readable recording medium that stores a program that, when executed by a processor, causes the processor to perform media processing, comprising:

• a first program module in a first layer which controls input/output of media data, determines a call time of each frame cycle, and calls a second program module in a second layer at the determined call time, the first layer being higher than the second layer, the frame cycle being determined by a group of data items, and the group of data items having an amount predetermined according to the media data;
• a second program module in a second layer which calls at least one third program module in a third layer, the third layer being lower than the second layer;
• and
• at least one third program module in a third layer which causes the processor to perform data conversion on the media data, the data conversion being part of the media processing.

An audio playback device comprising:

• a media processor operable to perform media processing;
• a storage operable to store encoded audio data;
• a readout operable to read out the encoded audio data from said storage;
• a receiver operable to receive an instruction from a user;
• a controller operable to instruct said media processor to commence audio playback based on the instruction received by said receiver;
• and
• an output operable to output decoded audio data generated by said media processor to an exterior,
• wherein said media processor
• (a) controls input of the encoded audio data read out by said readout and output of the decoded audio data to said output, determines a call time of each frame cycle, and calls a second program module in a second layer at each determined call time, the second layer being lower than a first layer, by executing a first program module in the first layer, the frame cycle being determined by a group of data items, and the group of data items having an amount predetermined according to the audio data,
• (b) calls at least one third program module in a third layer, the third layer being lower than the second layer, by executing the called second program module, and
• (c) performs media processing which converts the inputted encoded audio data to decoded audio data, by executing the called third program module.

An audio recording device comprising:

• a media processor operable to perform media processing;
• a storage operable to store encoded audio data;
• an acquirer operable to acquire audio data from the exterior;
• a receiver operable to receive an instruction from a user;
• a controller operable to instruct said media processor to commence audio recording based on the instruction received by said receiver;
• and
• a writer operable to write the encoded audio data generated by said media processor into said storage,
• wherein said media processor
• (a) controls input of the audio data acquired by said acquirer and output of the encoded audio data to said writer, determines a call time of each frame cycle, and calls a second program module in a second layer at each determined call time, the second layer being lower than a first layer, by executing a first program module in the first layer, the frame cycle being determined by a group of data items, and the group of data items having an amount predetermined according to the audio data,
• (b) calls at least one third program module in a third layer, the third layer being lower than the second layer, by executing the called second program module, and
• (c) performs media processing which converts the inputted audio data to encoded audio data, by executing the called third program module.

A video playback device comprising:

• a media processor operable to perform media processing;
• a storage operable to accumulate encoded video data;
• a readout operable to read out the encoded video data from said storage;
• a receiver operable to receive an instruction from a user;
• a controller operable to instruct said media processor to commence video playback based on the instruction received by said receiver;
• and
• an output operable to output decoded video data generated by said media processor to the exterior,
• wherein said media processor
• (a) controls input of the encoded video data read out by said readout and output of the decoded video data to said output, determines a call time of each frame cycle, and calls a second program module in a second layer at each determined call time, the second layer being lower than a first layer, by executing a first program module in the first layer, the frame cycle being determined by a group of data items, and the group of data items having an amount predetermined according to the video data,
• (b) calls at least one third program module in a third layer, the third layer being lower than the second layer, by executing the called second program module, and
• (c) performs media processing which converts the inputted encoded video data to decoded video data, by executing the called third program module.

A video recording device comprising:

• a media processor operable to perform media processing;
• a storage operable to store encoded video data;
• an acquirer operable to acquire video data from the exterior of the video recording device;
• a receiver operable to receive an instruction from a user;
• a controller operable to instruct said media processor to commence video recording based on the instruction received by said receiver;
• and
• a writer operable to write the encoded video data generated by said media processor into said storage,
• wherein said media processor
• (a) controls input of the video data acquired by said acquirer and output of the encoded video data to said writer, determines a call time of each frame cycle, and calls a second program module in a second layer at each determined call time, the second layer being lower than a first layer, by executing a first program module in the first layer, the frame cycle being determined by a group of data items, and the group of data items having an amount predetermined according to the video data,
• (b) calls at least one third program module in a third layer, the third layer being lower than the second layer, by executing the called second program module, and
• (c) performs media processing which converts the inputted video data to encoded video data, by executing the called third program module.

A video playback device comprising:

• a media processor operable to perform media processing;
• a storage operable to accumulate first and second encoded video data;
• a readout operable to read out the first and second encoded video data from said storage;
• a receiver operable to receive an instruction from a user;
• a controller operable to instruct said media processor to commence playback of the first and second encoded video data based on the instruction received by said receiver;
• and
• an output operable to output first and second decoded video data generated by said media processor to the exterior,
• wherein said media processor
• (a) controls input of the first encoded video data read out by said readout and output of the first decoded video data to said output, determines a call time of each frame cycle, and calls a second program module in a second layer at each determined call time, the second layer being lower than a first layer, by executing a first program module in the first layer, the frame cycle being determined by a group of data items, and the group of data items having an amount predetermined according to the media data,
• (b) calls at least one third program module in a third layer, the third layer being lower than the second layer, by executing the called second program module,
• (c) performs media processing which converts the inputted first encoded video data to first decoded video data, by executing the called third program module,
• (d) controls input of the second encoded video data read out by said readout and output of the second decoded video data to said output, determines a call time of each frame cycle, and calls a fifth program module in a second layer at each determined call time, the second layer being lower than a first layer, by executing a fourth program module in the first layer, the frame cycle being determined by a group of data items, and the group of data items having an amount predetermined according to the media data,
• (e) calls at least one sixth program module in a third layer, the third layer being lower than the second layer, by executing the called fifth program module, and
• (f) performs media processing which converts the inputted second encoded video data to second decoded video data, by executing the called sixth program module.

A real-time processing method for performing real-time processing by causing a processor to execute plural program modules, the method comprising:

• performing time management of each frame cycle, and calling at least one second program module in a second layer, by executing a first program module in a first layer, the second layer being lower than the first layer, the frame cycle being determined by a group of data items, and the group of data items having an amount predetermined according to media data;
• calling a third program module in a third layer and processing data per unit time, the third layer being lower than the second layer, by executing the second program module in the second layer;
• and
• causing the processor to perform a process, the process being part of the real-time processing, by executing the third program module in the third layer.