gstreamer/subprojects/gst-plugins-bad/sys/aja/gstajadeviceprovider.cpp

/*
 * Copyright (C) 2019 Mathieu Duponchelle <mathieu@centricular.com>
 * Copyright (C) 2019,2021 Sebastian Dröge <sebastian@centricular.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "gstajacommon.h"
#include "gstajadeviceprovider.h"

static GstDevice *gst_aja_device_new(CNTV2Device &device, guint index,
                                     gboolean video);

G_DEFINE_TYPE(GstAjaDeviceProvider, gst_aja_device_provider,
              GST_TYPE_DEVICE_PROVIDER);

static void gst_aja_device_provider_init(GstAjaDeviceProvider *self) {}

static GList *gst_aja_device_provider_probe(GstDeviceProvider *provider) {
  GList *ret = NULL;

  CNTV2Card device;
  guint device_idx = 0;

  while (CNTV2DeviceScanner::GetDeviceAtIndex(device_idx, device)) {
    auto features = device.features();
    // Skip non-input / non-output devices
    if (features.GetNumVideoInputs() == 0 && features.GetNumVideoOutputs() == 0)
      continue;

    if (features.GetNumVideoInputs() > 0)
      ret = g_list_prepend(ret, gst_aja_device_new(device, device_idx, TRUE));
    if (features.GetNumVideoOutputs() > 0)
      ret = g_list_prepend(ret, gst_aja_device_new(device, device_idx, FALSE));
  }

  ret = g_list_reverse(ret);

  return ret;
}

static void gst_aja_device_provider_class_init(
    GstAjaDeviceProviderClass *klass) {
  GstDeviceProviderClass *dm_class = GST_DEVICE_PROVIDER_CLASS(klass);

  dm_class->probe = GST_DEBUG_FUNCPTR(gst_aja_device_provider_probe);

  gst_device_provider_class_set_static_metadata(
      dm_class, "AJA Device Provider", "Source/Audio/Video",
      "List and provides AJA capture devices",
      "Sebastian Dröge <sebastian@centricular.com>");
}

G_DEFINE_TYPE(GstAjaDevice, gst_aja_device, GST_TYPE_DEVICE);

static void gst_aja_device_init(GstAjaDevice *self) {}

static GstElement *gst_aja_device_create_element(GstDevice *device,
                                                 const gchar *name) {
  GstAjaDevice *self = GST_AJA_DEVICE(device);
  GstElement *ret = NULL;

  if (self->is_capture) {
    ret = gst_element_factory_make("ajasrc", name);
  } else {
    ret = gst_element_factory_make("ajasink", name);
  }

  if (ret) {
    gchar *device_identifier = g_strdup_printf("%u", self->device_index);

    g_object_set(ret, "device-identifier", device_identifier, NULL);
    g_free(device_identifier);
  }

  return ret;
}

static void gst_aja_device_class_init(GstAjaDeviceClass *klass) {
  GstDeviceClass *gst_device_class = GST_DEVICE_CLASS(klass);

  gst_device_class->create_element =
      GST_DEBUG_FUNCPTR(gst_aja_device_create_element);
}

static GstDevice *gst_aja_device_new(CNTV2Card &device, guint index,
                                     gboolean is_capture) {
  GstDevice *ret;
  gchar *display_name;
  const gchar *device_class;
  GstCaps *caps = NULL;
  GstStructure *properties;

  device_class = is_capture ? "Audio/Video/Source" : "Audio/Video/Sink";
  display_name = g_strdup_printf("AJA %s (%s)", device.GetDisplayName().c_str(),
                                 is_capture ? "Source" : "Sink");

  caps = gst_ntv2_supported_caps(device.GetDeviceID());

  properties = gst_structure_new_empty("properties");

  auto features = device.features();
  auto widget_ids = device.GetSupportedItems(kNTV2EnumsID_WidgetID);
  gst_structure_set(
      properties, "device-id", G_TYPE_UINT, device.GetDeviceID(),
      "device-index", G_TYPE_UINT, index, "serial-number", G_TYPE_UINT64,
      device.GetSerialNumber(), "device-identifier", G_TYPE_STRING,
      device.GetDisplayName().c_str(), "num-audio-streams", G_TYPE_UINT,
      features.GetNumAudioSystems(), "dual-link-support", G_TYPE_BOOLEAN,
      features.CanDoDualLink(), "sdi-3g-support", G_TYPE_BOOLEAN,
      widget_ids.find(NTV2_Wgt3GSDIOut1) != widget_ids.end(), "sdi-12g-support",
      G_TYPE_BOOLEAN, device.IsSupported(kDeviceCanDo12GSDI), "ip-support",
      G_TYPE_BOOLEAN, device.IsSupported(kDeviceCanDoIP), "bi-directional-sdi",
      G_TYPE_BOOLEAN, device.IsSupported(kDeviceHasBiDirectionalSDI),
      "ltc-in-support", G_TYPE_BOOLEAN,
      device.GetNumSupported(kDeviceGetNumLTCInputs) > 0, "ltc-in-on-ref-port",
      G_TYPE_BOOLEAN, device.IsSupported(kDeviceCanDoLTCInOnRefPort),
      "2k-support", G_TYPE_BOOLEAN, device.IsSupported(kDeviceCanDo2KVideo),
      "4k-support", G_TYPE_BOOLEAN, device.IsSupported(kDeviceCanDo4KVideo),
      "8k-support", G_TYPE_BOOLEAN, device.IsSupported(kDeviceCanDo8KVideo),
      "multiformat-support", G_TYPE_BOOLEAN,
      device.IsSupported(kDeviceCanDoMultiFormat), NULL);

  if (is_capture) {
    gst_structure_set(
        properties, "num-vid-inputs", G_TYPE_UINT, features.GetNumVideoInputs(),
        "num-anlg-vid-inputs", G_TYPE_UINT, features.GetNumAnalogVideoInputs(),
        "num-hdmi-vid-inputs", G_TYPE_UINT, features.GetNumHDMIVideoInputs(),
        "num-analog-audio-input-channels", G_TYPE_UINT,
        features.GetNumAnalogAudioInputChannels(),
        "num-aes-audio-input-channels", G_TYPE_UINT,
        features.GetNumAESAudioInputChannels(),
        "num-embedded-audio-input-channels", G_TYPE_UINT,
        features.GetNumEmbeddedAudioInputChannels(),
        "num-hdmi-audio-input-channels", G_TYPE_UINT,
        features.GetNumHDMIAudioInputChannels(), NULL);
  } else {
    gst_structure_set(properties, "num-vid-outputs", G_TYPE_UINT,
                      features.GetNumVideoOutputs(), "num-anlg-vid-outputs",
                      G_TYPE_UINT, features.GetNumAnalogVideoOutputs(),
                      "num-hdmi-vid-outputs", G_TYPE_UINT,
                      features.GetNumHDMIVideoOutputs(),
                      "num-analog-audio-output-channels", G_TYPE_UINT,
                      features.GetNumAnalogAudioOutputChannels(),
                      "num-aes-audio-output-channels", G_TYPE_UINT,
                      features.GetNumAESAudioOutputChannels(),
                      "num-embedded-audio-output-channels", G_TYPE_UINT,
                      features.GetNumEmbeddedAudioOutputChannels(),
                      "num-hdmi-audio-output-channels", G_TYPE_UINT,
                      features.GetNumHDMIAudioOutputChannels(), NULL);
  }

  ret = GST_DEVICE(g_object_new(GST_TYPE_AJA_DEVICE, "display-name",
                                display_name, "device-class", device_class,
                                "caps", caps, "properties", properties, NULL));

  g_free(display_name);
  gst_caps_unref(caps);
  gst_structure_free(properties);

  GST_AJA_DEVICE(ret)->is_capture = is_capture;
  GST_AJA_DEVICE(ret)->device_index = index;

  return ret;
}