mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-10-04 17:52:29 +00:00
Instead of duplicating the same code Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4794>
561 lines
16 KiB
C++
561 lines
16 KiB
C++
/* GStreamer
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* Copyright (C) 2022 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 along 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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/**
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* SECTION:element-win32ipcvideosrc
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* @title: win32ipcvideosrc
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* @short_description: Windows shared memory video source
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*
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* win32ipcvideosrc receives raw video frames from win32ipcvideosink
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* and outputs the received video frames
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*
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* ## Example launch line
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* ```
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* gst-launch-1.0 win32ipcvideosrc ! queue ! videoconvert ! d3d11videosink
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* ```
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*
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* Since: 1.22
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstwin32ipcvideosrc.h"
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#include "gstwin32ipcutils.h"
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#include "protocol/win32ipcpipeclient.h"
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#include <string>
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GST_DEBUG_CATEGORY_STATIC (gst_win32_ipc_video_src_debug);
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#define GST_CAT_DEFAULT gst_win32_ipc_video_src_debug
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS_ALL)));
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enum
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{
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PROP_0,
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PROP_PIPE_NAME,
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PROP_PROCESSING_DEADLINE,
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};
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#define DEFAULT_PIPE_NAME "\\\\.\\pipe\\gst.win32.ipc.video"
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#define DEFAULT_PROCESSING_DEADLINE (20 * GST_MSECOND)
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struct _GstWin32IpcVideoSrc
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{
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GstBaseSrc parent;
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GstVideoInfo info;
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Win32IpcPipeClient *pipe;
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GstCaps *caps;
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gboolean flushing;
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SRWLOCK lock;
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gboolean have_video_meta;
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gsize offset[GST_VIDEO_MAX_PLANES];
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gint stride[GST_VIDEO_MAX_PLANES];
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GstBufferPool *pool;
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/* properties */
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gchar *pipe_name;
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GstClockTime processing_deadline;
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};
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static void gst_win32_ipc_video_src_finalize (GObject * object);
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static void gst_win32_ipc_video_src_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_win32_video_src_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstClock *gst_win32_video_src_provide_clock (GstElement * elem);
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static gboolean gst_win32_ipc_video_src_start (GstBaseSrc * src);
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static gboolean gst_win32_ipc_video_src_stop (GstBaseSrc * src);
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static gboolean gst_win32_ipc_video_src_unlock (GstBaseSrc * src);
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static gboolean gst_win32_ipc_video_src_unlock_stop (GstBaseSrc * src);
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static gboolean gst_win32_ipc_video_src_query (GstBaseSrc * src,
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GstQuery * query);
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static gboolean gst_win32_ipc_video_src_decide_allocation (GstBaseSrc * src,
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GstQuery * query);
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static GstFlowReturn gst_win32_ipc_video_src_create (GstBaseSrc * src,
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guint64 offset, guint size, GstBuffer ** buf);
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#define gst_win32_ipc_video_src_parent_class parent_class
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G_DEFINE_TYPE (GstWin32IpcVideoSrc, gst_win32_ipc_video_src, GST_TYPE_BASE_SRC);
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static void
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gst_win32_ipc_video_src_class_init (GstWin32IpcVideoSrcClass * klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GstBaseSrcClass *src_class = GST_BASE_SRC_CLASS (klass);
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object_class->finalize = gst_win32_ipc_video_src_finalize;
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object_class->set_property = gst_win32_ipc_video_src_set_property;
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object_class->get_property = gst_win32_video_src_get_property;
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g_object_class_install_property (object_class, PROP_PIPE_NAME,
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g_param_spec_string ("pipe-name", "Pipe Name",
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"The name of Win32 named pipe to communicate with server. "
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"Validation of the pipe name is caller's responsibility",
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DEFAULT_PIPE_NAME, (GParamFlags) (G_PARAM_READWRITE |
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G_PARAM_STATIC_STRINGS | GST_PARAM_MUTABLE_READY)));
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g_object_class_install_property (object_class, PROP_PROCESSING_DEADLINE,
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g_param_spec_uint64 ("processing-deadline", "Processing deadline",
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"Maximum processing time for a buffer in nanoseconds", 0, G_MAXUINT64,
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DEFAULT_PROCESSING_DEADLINE, (GParamFlags) (G_PARAM_READWRITE |
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G_PARAM_STATIC_STRINGS | GST_PARAM_MUTABLE_PLAYING)));
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gst_element_class_set_static_metadata (element_class,
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"Win32 IPC Video Source", "Source/Video",
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"Receive video frames from the win32ipcvideosink",
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"Seungha Yang <seungha@centricular.com>");
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gst_element_class_add_static_pad_template (element_class, &src_template);
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element_class->provide_clock =
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GST_DEBUG_FUNCPTR (gst_win32_video_src_provide_clock);
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src_class->start = GST_DEBUG_FUNCPTR (gst_win32_ipc_video_src_start);
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src_class->stop = GST_DEBUG_FUNCPTR (gst_win32_ipc_video_src_stop);
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src_class->unlock = GST_DEBUG_FUNCPTR (gst_win32_ipc_video_src_unlock);
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src_class->unlock_stop =
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GST_DEBUG_FUNCPTR (gst_win32_ipc_video_src_unlock_stop);
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src_class->query = GST_DEBUG_FUNCPTR (gst_win32_ipc_video_src_query);
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src_class->decide_allocation =
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GST_DEBUG_FUNCPTR (gst_win32_ipc_video_src_decide_allocation);
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src_class->create = GST_DEBUG_FUNCPTR (gst_win32_ipc_video_src_create);
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GST_DEBUG_CATEGORY_INIT (gst_win32_ipc_video_src_debug, "win32ipcvideosrc",
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0, "win32ipcvideosrc");
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}
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static void
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gst_win32_ipc_video_src_init (GstWin32IpcVideoSrc * self)
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{
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gst_base_src_set_format (GST_BASE_SRC (self), GST_FORMAT_TIME);
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gst_base_src_set_live (GST_BASE_SRC (self), TRUE);
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self->pipe_name = g_strdup (DEFAULT_PIPE_NAME);
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self->processing_deadline = DEFAULT_PROCESSING_DEADLINE;
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GST_OBJECT_FLAG_SET (self, GST_ELEMENT_FLAG_PROVIDE_CLOCK);
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GST_OBJECT_FLAG_SET (self, GST_ELEMENT_FLAG_REQUIRE_CLOCK);
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}
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static void
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gst_win32_ipc_video_src_finalize (GObject * object)
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{
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GstWin32IpcVideoSrc *self = GST_WIN32_IPC_VIDEO_SRC (object);
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g_free (self->pipe_name);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_win32_ipc_video_src_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstWin32IpcVideoSrc *self = GST_WIN32_IPC_VIDEO_SRC (object);
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switch (prop_id) {
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case PROP_PIPE_NAME:
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GST_OBJECT_LOCK (self);
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g_free (self->pipe_name);
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self->pipe_name = g_value_dup_string (value);
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if (!self->pipe_name)
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self->pipe_name = g_strdup (DEFAULT_PIPE_NAME);
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GST_OBJECT_UNLOCK (self);
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break;
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case PROP_PROCESSING_DEADLINE:
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{
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GstClockTime prev_val, new_val;
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GST_OBJECT_LOCK (self);
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prev_val = self->processing_deadline;
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new_val = g_value_get_uint64 (value);
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self->processing_deadline = new_val;
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GST_OBJECT_UNLOCK (self);
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if (prev_val != new_val) {
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GST_DEBUG_OBJECT (self, "Posting latency message");
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gst_element_post_message (GST_ELEMENT_CAST (self),
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gst_message_new_latency (GST_OBJECT_CAST (self)));
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}
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break;
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}
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_win32_video_src_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstWin32IpcVideoSrc *self = GST_WIN32_IPC_VIDEO_SRC (object);
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switch (prop_id) {
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case PROP_PIPE_NAME:
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GST_OBJECT_LOCK (self);
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g_value_set_string (value, self->pipe_name);
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GST_OBJECT_UNLOCK (self);
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break;
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case PROP_PROCESSING_DEADLINE:
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GST_OBJECT_LOCK (self);
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g_value_set_uint64 (value, self->processing_deadline);
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GST_OBJECT_UNLOCK (self);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static GstClock *
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gst_win32_video_src_provide_clock (GstElement * elem)
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{
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return gst_system_clock_obtain ();
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}
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static gboolean
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gst_win32_ipc_video_src_start (GstBaseSrc * src)
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{
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GstWin32IpcVideoSrc *self = GST_WIN32_IPC_VIDEO_SRC (src);
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GST_DEBUG_OBJECT (self, "Start");
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gst_video_info_init (&self->info);
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return TRUE;
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}
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static gboolean
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gst_win32_ipc_video_src_stop (GstBaseSrc * src)
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{
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GstWin32IpcVideoSrc *self = GST_WIN32_IPC_VIDEO_SRC (src);
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GST_DEBUG_OBJECT (self, "Stop");
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if (self->pipe) {
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win32_ipc_pipe_client_stop (self->pipe);
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g_clear_pointer (&self->pipe, win32_ipc_pipe_client_unref);
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}
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gst_clear_caps (&self->caps);
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if (self->pool) {
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gst_buffer_pool_set_active (self->pool, FALSE);
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gst_clear_object (&self->pool);
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}
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return TRUE;
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}
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static gboolean
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gst_win32_ipc_video_src_unlock (GstBaseSrc * src)
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{
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GstWin32IpcVideoSrc *self = GST_WIN32_IPC_VIDEO_SRC (src);
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GST_DEBUG_OBJECT (self, "Unlock");
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AcquireSRWLockExclusive (&self->lock);
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self->flushing = TRUE;
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if (self->pipe)
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win32_ipc_pipe_client_set_flushing (self->pipe, TRUE);
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ReleaseSRWLockExclusive (&self->lock);
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return TRUE;
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}
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static gboolean
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gst_win32_ipc_video_src_unlock_stop (GstBaseSrc * src)
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{
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GstWin32IpcVideoSrc *self = GST_WIN32_IPC_VIDEO_SRC (src);
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GST_DEBUG_OBJECT (self, "Unlock stop");
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AcquireSRWLockExclusive (&self->lock);
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self->flushing = FALSE;
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if (self->pipe)
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win32_ipc_pipe_client_set_flushing (self->pipe, FALSE);
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ReleaseSRWLockExclusive (&self->lock);
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return TRUE;
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}
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static gboolean
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gst_win32_ipc_video_src_query (GstBaseSrc * src, GstQuery * query)
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{
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GstWin32IpcVideoSrc *self = GST_WIN32_IPC_VIDEO_SRC (src);
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_LATENCY:
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{
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GST_OBJECT_LOCK (self);
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if (GST_CLOCK_TIME_IS_VALID (self->processing_deadline)) {
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gst_query_set_latency (query, TRUE, self->processing_deadline,
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/* pipe server can hold up to 5 memory objects */
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5 * self->processing_deadline);
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} else {
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gst_query_set_latency (query, TRUE, 0, 0);
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}
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GST_OBJECT_UNLOCK (self);
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return TRUE;
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}
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default:
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break;
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}
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return GST_BASE_SRC_CLASS (parent_class)->query (src, query);
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}
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static gboolean
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gst_win32_ipc_video_src_decide_allocation (GstBaseSrc * src, GstQuery * query)
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{
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GstWin32IpcVideoSrc *self = GST_WIN32_IPC_VIDEO_SRC (src);
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gboolean ret;
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ret = GST_BASE_SRC_CLASS (parent_class)->decide_allocation (src, query);
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if (!ret)
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return ret;
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self->have_video_meta = gst_query_find_allocation_meta (query,
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GST_VIDEO_META_API_TYPE, nullptr);
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GST_DEBUG_OBJECT (self, "Downstream supports video meta: %d",
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self->have_video_meta);
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return TRUE;
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}
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static GstCaps *
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gst_win32_ipc_video_src_update_info_and_get_caps (GstWin32IpcVideoSrc * self,
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const Win32IpcVideoInfo * info)
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{
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GstVideoInfo vinfo;
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gst_video_info_set_format (&vinfo, (GstVideoFormat) info->format,
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info->width, info->height);
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vinfo.fps_n = info->fps_n;
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vinfo.fps_d = info->fps_d;
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vinfo.par_n = info->par_n;
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vinfo.par_d = info->par_d;
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if (!self->caps || !gst_video_info_is_equal (&self->info, &vinfo)) {
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self->info = vinfo;
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return gst_video_info_to_caps (&vinfo);
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}
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return nullptr;
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}
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static gboolean
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gst_win32_ipc_ensure_fallback_pool (GstWin32IpcVideoSrc * self)
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{
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GstStructure *config;
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if (self->pool)
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return TRUE;
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self->pool = gst_video_buffer_pool_new ();
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config = gst_buffer_pool_get_config (self->pool);
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gst_buffer_pool_config_set_params (config, self->caps,
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GST_VIDEO_INFO_SIZE (&self->info), 0, 0);
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if (!gst_buffer_pool_set_config (self->pool, config)) {
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GST_ERROR_OBJECT (self, "Couldn't set config");
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goto error;
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}
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if (!gst_buffer_pool_set_active (self->pool, TRUE)) {
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GST_ERROR_OBJECT (self, "Couldn't set active");
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goto error;
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}
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return TRUE;
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error:
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gst_clear_object (&self->pool);
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return FALSE;
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}
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struct MmfReleaseData
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{
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Win32IpcPipeClient *pipe;
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Win32IpcMmf *mmf;
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};
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static void
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gst_win32_ipc_video_src_release_mmf (MmfReleaseData * data)
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{
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win32_ipc_pipe_client_release_mmf (data->pipe, data->mmf);
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win32_ipc_pipe_client_unref (data->pipe);
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delete data;
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}
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static GstFlowReturn
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gst_win32_ipc_video_src_create (GstBaseSrc * src, guint64 offset, guint size,
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GstBuffer ** buf)
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{
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GstWin32IpcVideoSrc *self = GST_WIN32_IPC_VIDEO_SRC (src);
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GstCaps *caps;
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Win32IpcMmf *mmf;
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Win32IpcVideoInfo info;
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GstFlowReturn ret = GST_FLOW_OK;
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GstBuffer *buffer;
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GstClock *clock;
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GstClockTime pts;
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GstClockTime base_time;
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GstClockTime now_qpc;
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GstClockTime now_gst;
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gboolean is_qpc = TRUE;
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gboolean need_video_meta = FALSE;
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AcquireSRWLockExclusive (&self->lock);
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if (self->flushing) {
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ReleaseSRWLockExclusive (&self->lock);
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return GST_FLOW_FLUSHING;
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}
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if (!self->pipe) {
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self->pipe = win32_ipc_pipe_client_new (self->pipe_name);
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if (!self->pipe) {
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ReleaseSRWLockExclusive (&self->lock);
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GST_ERROR_OBJECT (self, "Couldn't create pipe");
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return GST_FLOW_ERROR;
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}
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}
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ReleaseSRWLockExclusive (&self->lock);
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if (!win32_ipc_pipe_client_get_mmf (self->pipe, &mmf, &info)) {
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AcquireSRWLockExclusive (&self->lock);
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if (self->flushing) {
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ret = GST_FLOW_FLUSHING;
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GST_DEBUG_OBJECT (self, "Flushing");
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} else {
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ret = GST_FLOW_EOS;
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GST_WARNING_OBJECT (self, "Couldn't get buffer from server");
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}
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ReleaseSRWLockExclusive (&self->lock);
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return ret;
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}
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caps = gst_win32_ipc_video_src_update_info_and_get_caps (self, &info);
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for (guint i = 0; i < GST_VIDEO_INFO_N_PLANES (&self->info); i++) {
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self->offset[i] = (gsize) info.offset[i];
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self->stride[i] = (gint) info.stride[i];
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if (self->offset[i] != self->info.offset[i] ||
|
|
self->stride[i] != self->info.stride[i]) {
|
|
need_video_meta = TRUE;
|
|
}
|
|
}
|
|
|
|
if (caps) {
|
|
if (self->pool) {
|
|
gst_buffer_pool_set_active (self->pool, FALSE);
|
|
gst_clear_object (&self->pool);
|
|
}
|
|
|
|
gst_caps_replace (&self->caps, caps);
|
|
GST_DEBUG_OBJECT (self, "Setting caps %" GST_PTR_FORMAT, caps);
|
|
gst_pad_set_caps (GST_BASE_SRC_PAD (src), caps);
|
|
gst_caps_unref (caps);
|
|
}
|
|
|
|
if (self->have_video_meta || !need_video_meta) {
|
|
MmfReleaseData *data = new MmfReleaseData ();
|
|
data->pipe = win32_ipc_pipe_client_ref (self->pipe);
|
|
data->mmf = mmf;
|
|
|
|
buffer = gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY,
|
|
win32_ipc_mmf_get_raw (mmf), win32_ipc_mmf_get_size (mmf),
|
|
0, win32_ipc_mmf_get_size (mmf), data,
|
|
(GDestroyNotify) gst_win32_ipc_video_src_release_mmf);
|
|
|
|
if (self->have_video_meta) {
|
|
gst_buffer_add_video_meta_full (buffer,
|
|
GST_VIDEO_FRAME_FLAG_NONE, GST_VIDEO_INFO_FORMAT (&self->info),
|
|
GST_VIDEO_INFO_WIDTH (&self->info),
|
|
GST_VIDEO_INFO_HEIGHT (&self->info),
|
|
GST_VIDEO_INFO_N_PLANES (&self->info), self->offset, self->stride);
|
|
}
|
|
} else {
|
|
GstVideoFrame mmf_frame, frame;
|
|
|
|
if (!gst_win32_ipc_ensure_fallback_pool (self)) {
|
|
win32_ipc_mmf_unref (mmf);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
ret = gst_buffer_pool_acquire_buffer (self->pool, &buffer, nullptr);
|
|
if (ret != GST_FLOW_OK) {
|
|
GST_ERROR_OBJECT (self, "Couldn't acquire buffer");
|
|
win32_ipc_mmf_unref (mmf);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
gst_video_frame_map (&frame, &self->info, buffer, GST_MAP_WRITE);
|
|
mmf_frame.info = self->info;
|
|
|
|
for (guint i = 0; i < GST_VIDEO_FRAME_N_PLANES (&frame); i++) {
|
|
mmf_frame.info.offset[i] = self->offset[i];
|
|
mmf_frame.info.stride[i] = self->stride[i];
|
|
mmf_frame.data[i] = (guint8 *) win32_ipc_mmf_get_raw (mmf) +
|
|
self->offset[i];
|
|
}
|
|
|
|
gst_video_frame_copy (&frame, &mmf_frame);
|
|
gst_video_frame_unmap (&frame);
|
|
win32_ipc_mmf_unref (mmf);
|
|
}
|
|
|
|
now_qpc = gst_util_get_timestamp ();
|
|
clock = gst_element_get_clock (GST_ELEMENT_CAST (self));
|
|
now_gst = gst_clock_get_time (clock);
|
|
base_time = GST_ELEMENT_CAST (self)->base_time;
|
|
|
|
is_qpc = gst_win32_ipc_clock_is_qpc (clock);
|
|
gst_object_unref (clock);
|
|
|
|
if (!is_qpc) {
|
|
GstClockTimeDiff now_pts = now_gst - base_time + info.qpc - now_qpc;
|
|
|
|
if (now_pts >= 0)
|
|
pts = now_pts;
|
|
else
|
|
pts = 0;
|
|
} else {
|
|
if (info.qpc >= base_time) {
|
|
/* Our base_time is also QPC */
|
|
pts = info.qpc - base_time;
|
|
} else {
|
|
GST_WARNING_OBJECT (self, "Server QPC is smaller than our QPC base time");
|
|
pts = 0;
|
|
}
|
|
}
|
|
|
|
GST_BUFFER_PTS (buffer) = pts;
|
|
GST_BUFFER_DTS (buffer) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_DURATION (buffer) = GST_CLOCK_TIME_NONE;
|
|
|
|
*buf = buffer;
|
|
|
|
return GST_FLOW_OK;
|
|
}
|