System and related methods for reducing source filter invocation in a development project

• US 7,543,308 B2
• Filed: 02/02/2004
• Issued: 06/02/2009
• Est. Priority Date: 12/06/2000
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Rudolph, Eric H., Miller, Daniel J.
• Primary Examiner(s): Patel; Haresh N
• Application Number:
  US10/770,093
• Publication Number:
  US 20040225683A1
• Time in Patent Office: 1,947 Days
• Field of Search: 719/328, 719/315, 719/316, 719/310, 709/201, 709/231, 725/115, 381/119, 707/104, 707/1, 707/103, 713/400, 345/716
• US Class Current: 719/328
• CPC Class Codes: G06F 9/5016 the resource being the memory

Abstract

A method of representing a development project is presented comprising identifying a plurality of sources comprising the development project, determining whether any of the sources are required simultaneously and, if not, dynamically generating a filter graph representation of the development project utilizing a segment filter to couple a source to multiple processing threads.

Claims

1. A method of generating a filter graph for a user-defined processing project, the method comprising:

analyzing the project for multiple accesses to a single source of media content;

determining that the multiple accesses cannot be combined and/or share a common processing chain; and

coupling a single instance of the media source to the one or more processing chains through a software object to satisfy the multiple accesses without invoking a commensurate number of multiple instances of the media source, wherein the software object is a segment filter and further wherein the one or more processing chains comprise;

a scalable, dynamically reconfigurable matrix switch having a plurality of inputs and a plurality of outputs;

at least one matrix switch input being communicatively linked with a first processing chain portion;

at least one other matrix switch input being communicatively linked with a second processing chain portion;

the matrix switch being configured to dynamically couple one or more of the matrix switch inputs to one or more of the matrix switch outputs.

2. A method according to claim 1, further comprising:

receiving a request for content at the software object; and

issuing a seek command from the software object to the media source to retrieve the media for presentation to a requesting processing chain.

3. A method according to claim 1, wherein the method is implemented by a render engine, exposed from an operating system to a media processing system executing on a computing system.

4. A method according to claim 1, further comprising:

identifying multiple simultaneous access to the media source; and

invoking a commensurate number of software objects, coupling a commensurate number of instances of the media source to processing chains to satisfy the multiple simultaneous requests.

5. A storage medium comprising a plurality of executable instructions including at least a subset of which that, when executed, implement a method according to claim 1.

6. A computing system comprising:

a storage medium having stored thereon a plurality of executable instructions; and

an execution unit, coupled to the storage medium, to execute at least a subset of the plurality of executable instructions to implement a method according to claim 1.

7. A method of generating a filter graph for a user-defined processing project, the method comprising:

analyzing the project for multiple accesses to a single source of media content;

determining that the multiple accesses cannot be combined and/or share a common processing chain;

coupling a single instance of the media source to the multiple processing chains through a software object to satisfy the multiple accesses without invoking a commensurate number of multiple instances of the media source, wherein the software object is a segment filter; and

ascertaining whether the multiple processing chains share common pre-processing attributes and, if so, interposing one or more associated filters between the single source of media content and the software object.

8. A method according to claim 7, further comprising:

receiving a request for content at the software object; and

issuing a seek command from the software object to the media source to retrieve the media for presentation to a requesting processing chain.

9. A method according to claim 7, wherein the method is implemented by a render engine, exposed from an operating system to a media processing system executing on a computing system.

10. A method according to claim 7, further comprising:

identifying multiple simultaneous access to the media source; and

invoking a commensurate number of software objects, coupling a commensurate number of instances of the media source to processing chains to satisfy the multiple simultaneous requests.

11. A storage medium comprising a plurality of executable instructions including at least a subset of which that, when executed, implement a method according to claim 7.