Current length of track using mm_renderer

Hello

IM writing my own MediaPlayer using the API of Client for the multimedia rendering engine. How can I implement a getDuration() method (which must returns the duration of the current track in seconds) using this API? Is it still possible? AFAIK the default MediaPlayer - bb/multimedia/MediaPlayer encapsulates the ROR, so there must be a way to achieve

Thanks in advance

Hello iksarp,

You can make use of the mm-converter of event management new mechanism to achieve this. It is located in the header file: 'mm/renderer/events.h. ' You would have to wait for the events of mm-rendering engine and look in the Dictionary object that it returns for different events. Specifically, for the field "Duration", it is returned in milliseconds and I am pasting a few snippets below:


    // At first, set up everything for the mm-renderer context to run
    // The set up steps should be similar to the existing sample application (https://github.com/blackberry/NDK-Samples/blob/next/VideoPlayback/main.c) but WITHOUT THE BPS EVENT HANDLING for mm-renderer
    // That is, you DO NOT need to do handle BPS event handling if you do the following event handling with "mm/renderer/evenths.h"

    // Now, do the event handling
    int errorWait;
    const mmr_event_t* event;

    for (;;)  {
        errorWait = mmr_event_wait( mmr_context );

        if (errorWait != 0 ) {
            //TODO: Error handling
        }
        // now, get the actual event
        event = mmr_event_get( mmr_context);

        switch (event->type) {
        // TODO: Handle all other switch cases, for the event types
        case 6:
            //metadata
            printf("###### event->type = 6 = MMR_EVENT_METADATA\n");

            const char *duration = strm_dict_find_value( event->data, "md_title_duration");
            fprintf(stdout, "duration= %s\n", duration);

            break;
        } // switch

        fflush(stdout);
    } // for

Essentially, for each event from mm-rendering engine, a set of attributes are exposed as elements of dictionary (in the 'data' field), to reflect the current state of the mm-engine rendering context (for example, read status, title, duration, etc.).

What's new with Beta 3 and the documentation is still not published correctly. We apologize for this; I have raised this issue with the documentation teams and I'll try to get them to publish

Hope this helps and please let us know if you need anything that anyone else.

See you soon,.

Rashid

Tags: BlackBerry Developers

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Current length of track using mm_renderer

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