Systems for generating and managing filter strings in a filter graph

• US 7,472,395 B2
• Filed: 10/05/2004
• Issued: 12/30/2008
• 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): An; Meng-Ai
• Assistant Examiner(s): Truong; Lechi
• Application Number:
  US10/958,441
• Publication Number:
  US 20050060712A1
• Time in Patent Office: 1,547 Days
• Field of Search: 719/310, 718/100
• US Class Current: 719/310
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence

Abstract

In accordance with at least one embodiment, a systems generates a source chain for use in a development project, and caches the source chain when it is not currently required in the development project.

Claims

1. A computing system comprising:

one or more computer-readable media;

one or more processors;

computer-readable instructions on the one or more computer-readable media which, when executed by the one or more processors, cause the one or more processors to perform a method comprising;

loading one or more source processing chains to support execution of a development project, the one or more source processing chains comprising a series of filters to process and render media content;

determining whether the one or more processing chains will be subsequently required within next M seconds during execution of the development project, the determining comprising;

identifying which one or more sources having media content will be processed and rendered within the next M seconds in a next section of the development project, wherein;

the next section of the development project is dynamically generated in the execution of the development project; and

M is at least as long as necessary to construct the one or more processing chains; and

identifying which of the one or more source processing chains will be necessary to process the one or more identified sources; and

assembling and caching, in an event that the one or more identified sources have not been previously used, the determined one or more processing chains that will be subsequently required, the caching comprising;

assigning each of the one or more processing chains a unique identifier; and

storing the unique identifier along with a pointer to a memory location occupied by each of the one or more processing chains in a cache.

2. The computing system of claim 1, wherein the method further comprises, in an event that the one or more identified sources have been previously used:

searching one or more caches of the computing system to determine whether the one or more source processing chains associated with the one or more sources are available within the one or more caches; and

retrieving the one or more processing chains from one or more memory locations denoted by associated one or more pointers in the one or more caches for integration with the development project.

3. The computing system of claim 2, wherein the method further comprises:

determining whether the one or more processing chains retrieved from the one or more caches satisfy processing requirements of the development project; and

modifying one or more objects of the one or more processing chains retrieved from the one or more caches that do not satisfy the processing requirements of the development project.

4. The computing system of claim 3, wherein the modifying the one or more objects is selected from a group consisting of

adding one or more processing objects to the one or more processing chains,

removing one or more processing objects from the one or more processing chains, and

changing one or more operating attributes of one or more processing objects within the one or more processing chains.

5. The computing system of claim 1, wherein the determining further comprises:

determining whether one or more future calls to a source coupled to the one or more processing chains exist within this development project; and

determining whether one or more future calls to a source coupled to the one or more processing chains will be received during execution of future development projects.

6. The computing system of claim 5, wherein it is assumed that each of the one or more processing chains will be required to support future execution of the development project or a future development project.

7. The computing system of claim 1, wherein the unique identifier is one or more of a source file handle, a source file name, a random numeric identifier uniquely assigned to each of the one or more processing chains, a graphical icon, and an alphanumeric character.

8. A computing system comprising:

one or more computer-readable media;

one or more processors;

computer-readable instructions on the one or more computer-readable media which, when executed by the one or more processors, cause the one or more processors to perform a method comprising;

generating a source processing chain for use in a development project, the source processing chain comprising a series of filters to process and render media content; and

determining the source processing chain to be subsequently required in the development project or a future development project, the determination comprising;

identifying which one or more sources having media content will be processed and rendered within next M seconds in a next section of the development project or the future development project, wherein;

the next section is dynamically generated; and

M is at least as long as necessary to construct the source processing chain; and

identifying whether the source processing chain will be necessary to process the one or more identified sources; and

caching, upon the determining, the source processing chain, the caching comprising;

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

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

9. The computing system of claim 8, 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 processing chain, and an alphanumeric identifier.

10. The computing system of claim 8, wherein the method further comprises:

identifying a need for a source processing chain; and

retrieving a suitable processing chain from a cache of such processing chains.

11. The computing system of claim 10, wherein the method further comprises:

integrating the retrieved processing chain into the development project.

12. The computing system of claim 10, wherein the method further comprises:

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

13. The computing system of claim 12, wherein the modifying one or more attributes of the source processing chain is performed by an action selected from a group consisting of:

adding processing objects to the source processing chain,

removing processing objects from the source processing chain, and

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

14. A system comprising:

one or more computers, each of which comprising;

one or more processors;

memory coupled to the one or more processors, the memory having computer-readable instructions stored thereon that, when executed by the one or more processors, direct the one or more processors to implement an interface, the interface selectively connected to a plurality of sources to generate a development project using one or more source processing chains comprising a series of filters to process and render media and supporting execution of the development project, the interface configured to;

dynamically cache, in a cache of the memory, the one or more source processing chains for each of the plurality of sources at a point during the execution of the development project when the one or more source processing chains are required within next M seconds to process and render the plurality of sources and a currently loaded chain-count of the one or more loaded source processing chains does not exceed a threshold T;

unload from the cache of the memory, at least a subset of the one or more source processing chains not required in subsequent execution of the development project or a future development project;

assign a unique identifier to each of the one or more source processing chains to be cached, and

store the unique identifier along with a pointer to a source processing chain cache memory in which each of the one or more source processing chains reside,

wherein M is less than a time required to load the one or more source processing chains.

15. A system according to claim 14, wherein the interface is further configured to identify and unload, in an event that the currently loaded chain-count has reached the threshold T, one or more currently loaded source processing chains not required in the subsequent execution of the development project or the future development project.

16. A system according to claim 15, wherein the interface is further configured to:

identify whether the one or more source processing chains will be required during subsequent execution of the development project or the future development project; and

caching the one or more identified source processing chains.

17. A system according to claim 14, wherein the interface is further configured to identify and unload, in an event that the currently loaded chain-count has reached the threshold T, one or more currently loaded source processing chains not required during next N seconds of the execution of the development project, wherein N is a pre-determined value.

18. A system according to claim 14, wherein the interface is further configured to:

remove the one or more identified source processing chains from the current development project and;

caching the removed one or more source processing chains.

19. A system according to claim 14, wherein the interface loads the one or more source processing chains by first searching the one or more source processing chains in a cache for a suitable match.

20. A system according to claim 19, wherein if the interface identifies a suitable match, the one or more matched processing chains are retrieved from memory for integration within the processing project.

21. A system according to claim 20, wherein the interface modifies one or more attributes of the one or more retrieved source processing chains before integration within the development project.

22. A system according to claim 21, wherein modifying the one or more source processing chains is performed by an action selected from a group consisting of:

adding one or more processing objects to the one or more source processing chains,

removing one or more processing objects from the one or more source processing chains, and

modifying one or more processing characteristics of one or more processing objects within the one or more source processing chains.