C++ (Cpp) gst_decklink_video_src_convert_to_external_clock示例

示例#1

文件： gstdecklinkaudiosrc.cpp 项目： luisbg/gst-plugins-bad

static void
gst_decklink_audio_src_got_packet (GstElement * element,
    IDeckLinkAudioInputPacket * packet, GstClockTime capture_time,
    gboolean discont)
{
  GstDecklinkAudioSrc *self = GST_DECKLINK_AUDIO_SRC_CAST (element);
  GstDecklinkVideoSrc *videosrc = NULL;

  GST_LOG_OBJECT (self, "Got audio packet at %" GST_TIME_FORMAT,
      GST_TIME_ARGS (capture_time));

  g_mutex_lock (&self->input->lock);
  if (self->input->videosrc)
    videosrc =
        GST_DECKLINK_VIDEO_SRC_CAST (gst_object_ref (self->input->videosrc));
  g_mutex_unlock (&self->input->lock);

  if (videosrc) {
    gst_decklink_video_src_convert_to_external_clock (videosrc, &capture_time,
        NULL);
    gst_object_unref (videosrc);
    GST_LOG_OBJECT (self, "Actual timestamp %" GST_TIME_FORMAT,
        GST_TIME_ARGS (capture_time));
  }

  g_mutex_lock (&self->lock);
  if (!self->flushing) {
    CapturePacket *p;

    while (g_queue_get_length (&self->current_packets) >= self->buffer_size) {
      p = (CapturePacket *) g_queue_pop_head (&self->current_packets);
      GST_WARNING_OBJECT (self, "Dropping old packet at %" GST_TIME_FORMAT,
          GST_TIME_ARGS (p->capture_time));
      capture_packet_free (p);
    }

    p = (CapturePacket *) g_malloc0 (sizeof (CapturePacket));
    p->packet = packet;
    p->capture_time = capture_time;
    p->discont = discont;
    packet->AddRef ();
    g_queue_push_tail (&self->current_packets, p);
    g_cond_signal (&self->cond);
  }
  g_mutex_unlock (&self->lock);
}

示例#2

文件： gstdecklinkvideosrc.cpp 项目： Distrotech/gst-plugins-bad

static void
gst_decklink_video_src_got_frame (GstElement * element,
    IDeckLinkVideoInputFrame * frame, GstDecklinkModeEnum mode,
    GstClockTime capture_time, GstClockTime capture_duration)
{
  GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (element);

  GST_LOG_OBJECT (self, "Got video frame at %" GST_TIME_FORMAT,
      GST_TIME_ARGS (capture_time));

  gst_decklink_video_src_convert_to_external_clock (self, &capture_time,
      &capture_duration);

  GST_LOG_OBJECT (self, "Actual timestamp %" GST_TIME_FORMAT,
      GST_TIME_ARGS (capture_time));

  g_mutex_lock (&self->lock);
  if (!self->flushing) {
    CaptureFrame *f;

    while (g_queue_get_length (&self->current_frames) >= self->buffer_size) {
      f = (CaptureFrame *) g_queue_pop_head (&self->current_frames);
      GST_WARNING_OBJECT (self, "Dropping old frame at %" GST_TIME_FORMAT,
          GST_TIME_ARGS (f->capture_time));
      capture_frame_free (f);
    }

    f = (CaptureFrame *) g_malloc0 (sizeof (CaptureFrame));
    f->frame = frame;
    f->capture_time = capture_time;
    f->capture_duration = capture_duration;
    f->mode = mode;
    frame->AddRef ();
    g_queue_push_tail (&self->current_frames, f);
    g_cond_signal (&self->cond);
  }
  g_mutex_unlock (&self->lock);
}

示例#3

文件： gstdecklinkvideosrc.cpp 项目： luisbg/gst-plugins-bad

static void
gst_decklink_video_src_got_frame (GstElement * element,
    IDeckLinkVideoInputFrame * frame, GstDecklinkModeEnum mode,
    GstClockTime capture_time, GstClockTime capture_duration, guint hours,
    guint minutes, guint seconds, guint frames, BMDTimecodeFlags bflags)
{
  GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (element);

  GST_LOG_OBJECT (self, "Got video frame at %" GST_TIME_FORMAT,
      GST_TIME_ARGS (capture_time));

  gst_decklink_video_src_convert_to_external_clock (self, &capture_time,
      &capture_duration);

  GST_LOG_OBJECT (self, "Actual timestamp %" GST_TIME_FORMAT,
      GST_TIME_ARGS (capture_time));

  g_mutex_lock (&self->lock);
  if (!self->flushing) {
    CaptureFrame *f;
    const GstDecklinkMode *bmode;
    GstVideoTimeCodeFlags flags = GST_VIDEO_TIME_CODE_FLAGS_NONE;
    guint field_count = 0;

    while (g_queue_get_length (&self->current_frames) >= self->buffer_size) {
      f = (CaptureFrame *) g_queue_pop_head (&self->current_frames);
      GST_WARNING_OBJECT (self, "Dropping old frame at %" GST_TIME_FORMAT,
          GST_TIME_ARGS (f->capture_time));
      capture_frame_free (f);
    }

    f = (CaptureFrame *) g_malloc0 (sizeof (CaptureFrame));
    f->frame = frame;
    f->capture_time = capture_time;
    f->capture_duration = capture_duration;
    f->mode = mode;
    f->format = frame->GetPixelFormat ();
    bmode = gst_decklink_get_mode (mode);
    if (bmode->interlaced) {
      flags =
          (GstVideoTimeCodeFlags) (flags |
          GST_VIDEO_TIME_CODE_FLAGS_INTERLACED);
      if (bflags & bmdTimecodeFieldMark)
        field_count = 2;
      else
        field_count = 1;
    }
    if (bflags & bmdTimecodeIsDropFrame)
      flags =
          (GstVideoTimeCodeFlags) (flags |
          GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME);
    f->tc =
        gst_video_time_code_new (bmode->fps_n, bmode->fps_d, NULL, flags, hours,
        minutes, seconds, frames, field_count);

    frame->AddRef ();
    g_queue_push_tail (&self->current_frames, f);
    g_cond_signal (&self->cond);
  }
  g_mutex_unlock (&self->lock);
}