System and methods for generating and managing filter strings in a filter graph

• US 7,712,106 B2
• Filed: 12/27/2005
• Issued: 05/04/2010
• 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): Truong; Lechi
• Application Number:
  US11/275,343
• Publication Number:
  US 20060168554A1
• Time in Patent Office: 1,589 Days
• Field of Search: 719/318, 719/310, 709/234, 709/236, 711/118, 711/3, 711/113
• US Class Current: 719/310
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence

Abstract

A method comprising generating a source chain for use in a development project, generating an identifier which is uniquely assigned to the source chain, and caching the source chain when it is not currently required in the development project. As execution of the development project continues, or during a subsequent project, if the source processing chain is required, it is retrieved from cache.

Claims

1. A method implemented at a computing device having a processor and cache memory communicatively coupled to the processor, the method comprising:

generating, at the computing device, a source chain for use in a development project, the source chain comprising a series of filters to process and render media content, wherein generating the source chain comprises;

associating the source chain with a source required to support execution of the development project;

searching one or more caches to determine whether the source chain associated with the source is available within the one or more caches;

in an event the source chain is available, retrieving the source chain for integration within the development project, wherein the source chain is retrieved from a memory location denoted by an associated one or more pointers in the one or more caches; and

in an event the source chain is not available, assembling the source chain by identifying processing objects required to pre-process the media content provided by the source in accordance with development project definitions; and

caching the source chain when it is not currently required in the development project, wherein caching the source chain comprises;

generating an identifier which is uniquely assigned to the source chain; and

storing the identifier along with a pointer to memory occupied by the source chain in a cache of pointers,

wherein the source chain is cached only in an event it is subsequently required in the development project, or a future development project.

2. A method according to claim 1, wherein the identifier is one or more of a source file handle, a file name, an icon, a randomly generated number uniquely assigned to the source chain, an alphanumeric identifier, and the like.

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

identifying a need for the cached source chain; and

retrieving the source chain from a cache of such source chains.

4. A method according to claim 3, further comprising:

integrating the retrieved source chain into the development project or the future development project.

5. A method according to claim 3, further comprising:

modifying one or more attributes of the retrieved source chain before integration into the development project or the future development project.

6. A method according to claim 5, wherein modifying the retrieved source chain comprises one or more of:

adding processing objects to the source chain;

removing processing objects from the-source chain;

or

altering one or more processing characteristics of one or more processing objects of the source chain.

7. A computing system comprising:

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

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

8. A system comprising:

a processor

a plurality of sources; and

an interface, selectively coupled to the plurality of sources and the processor, configured to;

generate a development project of processing chains, wherein the interface loads a processing chain for one of the plurality of sources at a point during execution of the development project when the processing chain is required, wherein;

the processing chains comprise a series of filters to process and render media content; and

loading the processing chain comprises;

associating the processing chain with the one source required to support execution of the development project;

searching one or more caches to determine whether the processing chain associated with the one source is available within the one or more caches;

in an event the processing chain is available, retrieving the processing chain for integration within the development project, wherein the processing chain is retrieved from a memory location denoted by an associated one or more pointers in the one or more caches; and

in an event the processing chain is not available, assembling the processing chain by identifying processing objects required to pre-process the media content provided by the one source in accordance with development project definitions;

cache the processing chain when it is not currently required in the development project, wherein caching the processing chain comprises;

generating an identifier which is uniquely assigned to the processing chain; and

storing the identifier along with a pointer to memory occupied by the processing chain in a cache of pointers; and

load at least one processing chain when it is not required in subsequent execution of the development project or a future development project.

9. A system according to claim 8,

wherein the interface only loads processing chains required during a next M seconds of project execution, if a current chain-count does not exceed a threshold, T.

10. A system according to claim 9, wherein M is less than a time required to load a processing chain.

11. A system according to claim 9,

wherein if the currently loaded chain-count has reached the threshold, T, the interface identifies one or more currently loaded processing chains that can be unloaded.

12. A system according to claim 11,

wherein the interface identifies for unloading, one or more currently loaded processing chains that will not be used during a next N seconds.

13. A system according to claim 11,

wherein the interface determines whether the identified one or more currently loaded processing chains will be required during subsequent execution of the development project, or in the future development project and, if so, caches the one or more identified currently loaded processing chains.

14. A system according to claim 13,

wherein the interface assigns a unique identifier to each of the one or more identified currently loaded processing chains to be cached, and stores the unique identifier along with a pointer to memory.

15. A system according to claim 8, wherein the processing chain is available when the interface identifies a suitable match.

16. A system according to claim 15, wherein, if the interface identifies a suitable match, the interface modifies one or more attributes of the retrieved processing chain before integration within the processing project.

17. A system according to claim 16,

wherein modifying the retrieved processing chain, comprises one or more of:

adding one or more processing objects to the processing chain;

removing one or more processing objects from the processing chain;

or

modifying one or more processing characteristics of one or more processing objects within the processing chain.