gst_editor.cpp

//
// Created by kantipud on 20-08-2019.
//

#include <gio/gio.h>
#include <ges/ges.h>
#include <gst/pbutils/gstdiscoverer.h>
#include <gst/pbutils/encoding-profile.h>

static void
bus_message_cb (GstBus * bus, GstMessage * message, GMainLoop * mainloop);

static GstEncodingProfile *make_profile_from_info (GstDiscovererInfo * info);

GESPipeline *pipeline = NULL;
gchar *output_uri = NULL;
guint assetsCount = 0;
guint assetsLoaded = 0;

static void
asset_loaded_cb (GObject * source_object, GAsyncResult * res,
                 GMainLoop * mainloop)
{
    GError *error = NULL;

    GESUriClipAsset *mfs =
            GES_URI_CLIP_ASSET (ges_asset_request_finish (res, &error));

    if (error) {
        GST_WARNING ("error creating asseti %s", error->message);

        return;
    }

    assetsLoaded++;
    /*
     * Check if we have loaded last asset and trigger concatenating
     */
    if (assetsLoaded == assetsCount) {
        GstDiscovererInfo *info = ges_uri_clip_asset_get_info (mfs);
        GstEncodingProfile *profile = make_profile_from_info (info);
        ges_pipeline_set_render_settings (pipeline, output_uri, profile);
        /* We want the pipeline to render (without any preview) */
        if (!ges_pipeline_set_mode (pipeline, GES_PIPELINE_MODE_SMART_RENDER)) {
            g_main_loop_quit (mainloop);
            return;
        }
        g_print ("Set pipeline PLAYING \n");
        gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
    }

    gst_object_unref (mfs);
}

int
main (int argc, char **argv)
{
    GMainLoop *mainloop = NULL;
    GESTimeline *timeline;
    GESLayer *layer = NULL;
    GstBus *bus = NULL;
    guint i;


    if (argc < 3) {
        g_print ("Usage: %s <output uri> <list of files>\n", argv[0]);
        return -1;
    }

    gst_init (&argc, &argv);
    ges_init ();

    timeline = ges_timeline_new_audio_video ();

    layer = (GESLayer *) ges_layer_new ();
    if (!ges_timeline_add_layer (timeline, layer))
        return -1;

    output_uri = argv[1];
    assetsCount = argc - 2;

    for (i = 2; i < argc; i++) {
        g_print ("Loading asset %s \n", argv[i]);
        ges_asset_request_async (GES_TYPE_URI_CLIP, argv[i],
                                 NULL, (GAsyncReadyCallback) asset_loaded_cb, mainloop);
    }

    /* In order to view our timeline, let's grab a convenience pipeline to put
     * our timeline in. */
    pipeline = ges_pipeline_new ();

    /* Add the timeline to that pipeline */
    if (!ges_pipeline_set_timeline (pipeline, timeline))
        return -1;

    mainloop = g_main_loop_new (NULL, FALSE);

    bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
    gst_bus_add_signal_watch (bus);
    g_signal_connect (bus, "message", G_CALLBACK (bus_message_cb), mainloop);

    g_main_loop_run (mainloop);

    return 0;

}

static void
bus_message_cb (GstBus * bus, GstMessage * message, GMainLoop * mainloop)
{
    switch (GST_MESSAGE_TYPE (message)) {
        case GST_MESSAGE_ERROR:
            g_print ("ERROR\n");
            g_main_loop_quit (mainloop);
            break;
        case GST_MESSAGE_EOS:
            g_print ("Done\n");
            g_main_loop_quit (mainloop);
            break;
        default:
            break;
    }
}

static GstEncodingProfile *
make_profile_from_info (GstDiscovererInfo * info)
{
    GstEncodingContainerProfile *profile = NULL;
    GstDiscovererStreamInfo *sinfo = gst_discoverer_info_get_stream_info (info);

    /* Get the container format */
    if (GST_IS_DISCOVERER_CONTAINER_INFO (sinfo)) {
        GList *tmp, *substreams;

        profile = gst_encoding_container_profile_new ((gchar *) "concatenate", NULL,
                                                      gst_discoverer_stream_info_get_caps (sinfo), NULL);

        substreams =
                gst_discoverer_container_info_get_streams ((GstDiscovererContainerInfo
                *) sinfo);

        /* For each on the formats add stream profiles */
        for (tmp = substreams; tmp; tmp = tmp->next) {
            GstDiscovererStreamInfo *stream = GST_DISCOVERER_STREAM_INFO (tmp->data);
            GstEncodingProfile *sprof = NULL;

            if (GST_IS_DISCOVERER_VIDEO_INFO (stream)) {
                sprof = (GstEncodingProfile *)
                        gst_encoding_video_profile_new (gst_discoverer_stream_info_get_caps
                                                                (stream), NULL, NULL, 1);
            } else if (GST_IS_DISCOVERER_AUDIO_INFO (stream)) {
                sprof = (GstEncodingProfile *)
                        gst_encoding_audio_profile_new (gst_discoverer_stream_info_get_caps
                                                                (stream), NULL, NULL, 1);
            } else {
                GST_WARNING ("Unsupported streams");
            }

            if (sprof)
                gst_encoding_container_profile_add_profile (profile, sprof);
        }
        if (substreams)
            gst_discoverer_stream_info_list_free (substreams);
    } else {
        GST_ERROR ("No container format !!!");
    }

    if (sinfo)
        gst_discoverer_stream_info_unref (sinfo);

    return GST_ENCODING_PROFILE (profile);
}