Function netcam_image_read_complete

src/netcam_http.c:878–923

* Publish new image * * Moves the image in 'receiving' into 'latest' and updates last frame time */

 * Moves the image in 'receiving' into 'latest' and updates last frame time
 */
void netcam_image_read_complete(netcam_context_ptr netcam)
{
    struct timeval curtime;
    netcam_buff *xchg;

    if (gettimeofday(&curtime, NULL) < 0) {
        MOTION_LOG(WRN, TYPE_NETCAM, SHOW_ERRNO, "gettimeofday");
    }

    netcam->receiving->image_time = curtime;
    /*
     * Calculate our "running average" time for this netcam's
     * frame transmissions (except for the first time).
     * Note that the average frame time is held in microseconds.
     */
    if (netcam->last_image.tv_sec) {
        netcam->av_frame_time = ((9.0 * netcam->av_frame_time) + 1000000.0 *
                                 (curtime.tv_sec - netcam->last_image.tv_sec) +
                                 (curtime.tv_usec- netcam->last_image.tv_usec)) / 10.0;

        /* The following floods the log.  Comment out until it is needed. */
        //MOTION_LOG(DBG, TYPE_NETCAM, NO_ERRNO, "Calculated frame time %f", netcam->av_frame_time);
    }

    netcam->last_image = curtime;

    /*
     * read is complete - set the current 'receiving' buffer atomically
     * as 'latest', and make the buffer previously in 'latest' become
     * the new 'receiving'.
     */
    pthread_mutex_lock(&netcam->mutex);

    xchg = netcam->latest;
    netcam->latest = netcam->receiving;
    netcam->receiving = xchg;
    netcam->imgcnt++;

    /*
     * We have a new frame ready.  We send a signal so that
     * any thread (e.g. the motion main loop) waiting for the
     * next frame to become available may proceed.
     */
    pthread_cond_signal(&netcam->pic_ready);
    pthread_mutex_unlock(&netcam->mutex);
}

/**
 * netcam_read_html_jpeg