v4l2src and mpeg4 plugins on Android

[Francesco Argese]

2013/10/2 Sebastian Dröge <slomo at circular-chaos.org>

>
> For your two problems, don't use the need-data/enough-data model of
> appsrc. Instead just start a thread (g_thread_new()) that pushes data
> all the time as fast as possible (or throttled if you want to limit the
> fps) to appsrc. appsrc will then block if too many frames are queued
> downstream, and you will only produce a new frame if the queues
> downstream are not all filled.
>

I call push function in a native function called directly by Java code when
a new preview frame is generated; the main loop is in another thread
created as in the third tutorial using Posix Threads. -> pthread_create
(&gst_app_thread, NULL, &app_function, data); [1]

Today I've investigated more and I have understood that it is not a problem
with the push function but a problem with lacking deallocation of the
buffer created (I have tried to comment the push function and the error
remains there).

Below my native function where I do the push operation in the buffer; if I
comment only the last instruction the error remains while if I comment also
the gst_app_buffer_new I have no errors. It seems that the buffer is never
freed; I have tried to free the last buffer received using g_free but it
doesn't resolve the problem.

What could be the problem?

Thanks in advance,
Francesco Argese

P.S.: You have convinced me to pass to 1.2 version and today I'm working
with it. :-)

--------------------------------------------------------------------------------------------------------------------------------------------------------------------
JNIEXPORT void JNICALL
Java_com_cetma_singlepipeline_MainActivity_nativeSetBuffer
  (JNIEnv *env, jobject thiz, jbyteArray frameData){

    CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);

    if(data->initialized == FALSE || data->isPlaying == FALSE)
        return;

        jbyte* frameDataPtr = (*env)->GetByteArrayElements(env, frameData,
NULL);
        jsize size = (*env)->GetArrayLength(env, frameData);

        if(data->bufferVideo == NULL)
            g_free(data->bufferVideo);

        data->bufferVideo = gst_app_buffer_new((guint8 *)frameDataPtr,
size, g_free, NULL);
        gst_app_src_push_buffer(data->appsrc, data->bufferVideo);

}
----------------------------------------------------------------------------------------------------------------------------------------------------------------------

[1] http://docs.gstreamer.com/display/GstSDK/Android+tutorial+3%3A+Video
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