Media streams from containers processed by hosted code

In a computing environment, a system comprising:

• at least one processor;
• a memory, communicatively coupled to the at least one processor, and including instructions for facilitating the system including;
• an application environment including a platform component;
• and
• an application programming interface set configured to couple untrusted application-level code to the platform component, the application-level code configured to process a content container, including unpacking content from the container to provide at least some of the content to the platform component via communication with the application environment through application programming interface calls, the application environment requesting a license for playing protected media data from the application-level code, and
• the application-level code providing the license for playing the protected media data, including any needed decryption data, to the application environment.

A computer-readable storage device having computer-executable instructions stored thereon, which in response to execution by a computer, cause the computer to perform steps comprising:

• hosting hosted code that downloads a container comprising untrusted media content in a format understood by the hosted code, and unpacks the container;
• communicating through a set of application programming interfaces with the hosted code to request samples of the untrusted media content;
• receiving the samples in response to the requests;
• providing the samples to a media pipeline for playback;
• determining that a license for playing protected media data is required;
• and
• receiving, from the hosted code, the license for playing the protected media data, including any needed decryption data.