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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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dc787434bc
Adds a new plugin for ASIO devices. Although there is a standard low-level audio API, WASAPI, on Windows, ASIO is still being broadly used for audio devices which are aiming to professional use case. In case of such devices, ASIO API might be able to show better quality and latency performance depending on manufacturer's driver implementation. In order to build this plugin, user should provide path to ASIO SDK as a build option, "asio-sdk-path". Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2309>
104 lines
4.4 KiB
C
104 lines
4.4 KiB
C
/* GStreamer
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* Copyright (C) 2021 Seungha Yang <seungha@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License aglong with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_ASIO_OBJECT_H__
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#define __GST_ASIO_OBJECT_H__
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#include <gst/gst.h>
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#include <windows.h>
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#include "gstasioutils.h"
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G_BEGIN_DECLS
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#define GST_TYPE_ASIO_OBJECT (gst_asio_object_get_type())
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G_DECLARE_FINAL_TYPE (GstAsioObject, gst_asio_object,
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GST, ASIO_OBJECT, GstObject);
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typedef struct {
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gboolean (*buffer_switch) (GstAsioObject * obj,
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glong index,
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ASIOBufferInfo * infos,
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guint num_infos,
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ASIOChannelInfo * input_channel_infos,
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ASIOChannelInfo * output_channel_infos,
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ASIOSampleRate sample_rate,
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glong buffer_size,
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ASIOTime * time_info,
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gpointer user_data);
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gpointer user_data;
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} GstAsioObjectCallbacks;
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typedef enum
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{
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GST_ASIO_DEVICE_CLASS_CAPTURE,
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GST_ASIO_DEVICE_CLASS_RENDER,
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GST_ASIO_DEVICE_CLASS_LOOPBACK_CAPTURE,
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} GstAsioDeviceClassType;
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GstAsioObject * gst_asio_object_new (const GstAsioDeviceInfo * info,
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gboolean occupy_all_channels);
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GstCaps * gst_asio_object_get_caps (GstAsioObject * obj,
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GstAsioDeviceClassType type,
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guint num_min_channels,
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guint num_max_channels);
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gboolean gst_asio_object_create_buffers (GstAsioObject * obj,
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GstAsioDeviceClassType type,
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guint * channel_indices,
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guint num_channels,
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guint * buffer_size);
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gboolean gst_asio_object_start (GstAsioObject * obj);
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gboolean gst_asio_object_install_callback (GstAsioObject * obj,
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GstAsioDeviceClassType type,
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GstAsioObjectCallbacks * callbacks,
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guint64 * callback_id);
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void gst_asio_object_uninstall_callback (GstAsioObject * obj,
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guint64 callback_id);
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gboolean gst_asio_object_get_max_num_channels (GstAsioObject * obj,
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glong * num_input_ch,
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glong * num_output_ch);
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gboolean gst_asio_object_get_buffer_size (GstAsioObject * obj,
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glong * min_size,
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glong * max_size,
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glong * preferred_size,
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glong * granularity);
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gboolean gst_asio_object_get_latencies (GstAsioObject * obj,
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glong * input_latency,
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glong * output_latency);
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gboolean gst_asio_object_can_sample_rate (GstAsioObject * obj,
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ASIOSampleRate sample_rate);
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gboolean gst_asio_object_get_sample_rate (GstAsioObject * obj,
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ASIOSampleRate * sample_rate);
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gboolean gst_asio_object_set_sample_rate (GstAsioObject * obj,
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ASIOSampleRate sample_rate);
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G_END_DECLS
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#endif /* __GST_ASIO_OBJECT_H__ */ |