mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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c6a6c56cdf
* Extend protocol so that client can notify of releasing shared memory * Server will hold shared memory object until it's released by client * Add allocator/buffer pool to reuse shared memory objects and buffers Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3765>
241 lines
6.8 KiB
C++
241 lines
6.8 KiB
C++
/* GStreamer
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* Copyright (C) 2023 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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstwin32ipcbufferpool.h"
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#include "gstwin32ipcmemory.h"
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#include <gst/video/video.h>
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GST_DEBUG_CATEGORY_STATIC (gst_win32_ipc_buffer_pool_debug);
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#define GST_CAT_DEFAULT gst_win32_ipc_buffer_pool_debug
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struct _GstWin32IpcBufferPool
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{
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GstBufferPool parent;
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GstWin32IpcAllocator *alloc;
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GstVideoInfo info;
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gboolean add_videometa;
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};
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#define gst_win32_ipc_buffer_pool_parent_class parent_class
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G_DEFINE_TYPE (GstWin32IpcBufferPool,
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gst_win32_ipc_buffer_pool, GST_TYPE_BUFFER_POOL);
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static void gst_win32_ipc_buffer_pool_dispose (GObject * object);
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static const gchar **gst_win32_ipc_buffer_pool_get_options (GstBufferPool *
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pool);
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static gboolean gst_win32_ipc_buffer_pool_set_config (GstBufferPool * pool,
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GstStructure * config);
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static GstFlowReturn gst_win32_ipc_buffer_pool_alloc_buffer (GstBufferPool *
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pool, GstBuffer ** buffer, GstBufferPoolAcquireParams * params);
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static gboolean gst_win32_ipc_buffer_pool_start (GstBufferPool * pool);
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static gboolean gst_win32_ipc_buffer_pool_stop (GstBufferPool * pool);
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static void
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gst_win32_ipc_buffer_pool_class_init (GstWin32IpcBufferPoolClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstBufferPoolClass *bufferpool_class = GST_BUFFER_POOL_CLASS (klass);
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gobject_class->dispose = gst_win32_ipc_buffer_pool_dispose;
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bufferpool_class->get_options = gst_win32_ipc_buffer_pool_get_options;
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bufferpool_class->set_config = gst_win32_ipc_buffer_pool_set_config;
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bufferpool_class->alloc_buffer = gst_win32_ipc_buffer_pool_alloc_buffer;
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bufferpool_class->start = gst_win32_ipc_buffer_pool_start;
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bufferpool_class->stop = gst_win32_ipc_buffer_pool_stop;
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GST_DEBUG_CATEGORY_INIT (gst_win32_ipc_buffer_pool_debug,
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"win32_ipcbufferpool", 0, "win32_ipcbufferpool object");
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}
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static void
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gst_win32_ipc_buffer_pool_init (GstWin32IpcBufferPool * self)
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{
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}
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static void
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gst_win32_ipc_buffer_pool_dispose (GObject * object)
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{
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GstWin32IpcBufferPool *self = GST_WIN32_IPC_BUFFER_POOL (object);
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if (self->alloc) {
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gst_win32_ipc_allocator_set_active (self->alloc, FALSE);
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gst_clear_object (&self->alloc);
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}
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static const gchar **
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gst_win32_ipc_buffer_pool_get_options (GstBufferPool * pool)
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{
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static const gchar *options[] = { GST_BUFFER_POOL_OPTION_VIDEO_META,
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nullptr
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};
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return options;
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}
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static gboolean
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gst_win32_ipc_buffer_pool_set_config (GstBufferPool * pool,
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GstStructure * config)
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{
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GstWin32IpcBufferPool *self = GST_WIN32_IPC_BUFFER_POOL (pool);
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GstVideoInfo info;
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GstCaps *caps = nullptr;
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gboolean ret = TRUE;
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guint size, min_buffers, max_buffers;
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if (!gst_buffer_pool_config_get_params (config, &caps, &size, &min_buffers,
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&max_buffers)) {
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GST_WARNING_OBJECT (pool, "Invalid config");
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return FALSE;
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}
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if (!caps) {
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GST_WARNING_OBJECT (pool, "No caps");
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return FALSE;
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}
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/* now parse the caps from the config */
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if (!gst_video_info_from_caps (&info, caps)) {
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GST_WARNING_OBJECT (self, "Couldn't get video info from caps");
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return FALSE;
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}
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if (size < info.size) {
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GST_WARNING_OBJECT (self, "Size is smaller for the caps");
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return FALSE;
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}
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info.size = MAX (size, info.size);
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self->info = info;
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GST_LOG_OBJECT (pool, "%dx%d, caps %" GST_PTR_FORMAT, info.width, info.height,
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caps);
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if (self->alloc) {
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gst_win32_ipc_allocator_set_active (self->alloc, FALSE);
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gst_clear_object (&self->alloc);
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}
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self->alloc = gst_win32_ipc_allocator_new (size);
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if (!self->alloc) {
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GST_ERROR_OBJECT (self, "Couldn't create allocator");
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return FALSE;
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}
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self->add_videometa = gst_buffer_pool_config_has_option (config,
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GST_BUFFER_POOL_OPTION_VIDEO_META);
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gst_buffer_pool_config_set_params (config,
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caps, info.size, min_buffers, max_buffers);
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return GST_BUFFER_POOL_CLASS (parent_class)->set_config (pool, config) && ret;
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}
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static GstFlowReturn
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gst_win32_ipc_buffer_pool_alloc_buffer (GstBufferPool * pool,
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GstBuffer ** buffer, GstBufferPoolAcquireParams * params)
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{
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GstWin32IpcBufferPool *self = GST_WIN32_IPC_BUFFER_POOL (pool);
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GstFlowReturn ret = GST_FLOW_OK;
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GstBuffer *buf;
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GstMemory *mem = nullptr;
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GstVideoInfo *info = &self->info;
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ret = gst_win32_ipc_allocator_acquire_memory (self->alloc, &mem);
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if (ret != GST_FLOW_OK) {
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GST_WARNING_OBJECT (self, "Couldn't acquire memory");
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return ret;
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}
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buf = gst_buffer_new ();
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gst_buffer_append_memory (buf, mem);
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if (self->add_videometa) {
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gst_buffer_add_video_meta_full (buf, GST_VIDEO_FRAME_FLAG_NONE,
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GST_VIDEO_INFO_FORMAT (info), GST_VIDEO_INFO_WIDTH (info),
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GST_VIDEO_INFO_HEIGHT (info), GST_VIDEO_INFO_N_PLANES (info),
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info->offset, info->stride);
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}
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*buffer = buf;
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return GST_FLOW_OK;
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}
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static gboolean
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gst_win32_ipc_buffer_pool_start (GstBufferPool * pool)
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{
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GstWin32IpcBufferPool *self = GST_WIN32_IPC_BUFFER_POOL (pool);
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gboolean ret;
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GST_DEBUG_OBJECT (self, "Start");
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if (!self->alloc) {
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GST_ERROR_OBJECT (self, "No allocator");
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return FALSE;
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}
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if (!gst_win32_ipc_allocator_set_active (self->alloc, TRUE)) {
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GST_ERROR_OBJECT (self, "Failed to activate allocator");
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return FALSE;
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}
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ret = GST_BUFFER_POOL_CLASS (parent_class)->start (pool);
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if (!ret) {
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GST_ERROR_OBJECT (self, "Failed to start");
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gst_win32_ipc_allocator_set_active (self->alloc, FALSE);
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return FALSE;
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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_buffer_pool_stop (GstBufferPool * pool)
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{
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GstWin32IpcBufferPool *self = GST_WIN32_IPC_BUFFER_POOL (pool);
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GST_DEBUG_OBJECT (self, "Stop");
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if (self->alloc)
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gst_win32_ipc_allocator_set_active (self->alloc, FALSE);
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return GST_BUFFER_POOL_CLASS (parent_class)->stop (pool);
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}
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GstBufferPool *
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gst_win32_ipc_buffer_pool_new (void)
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{
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GstWin32IpcBufferPool *self;
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self = (GstWin32IpcBufferPool *)
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g_object_new (GST_TYPE_WIN32_IPC_BUFFER_POOL, nullptr);
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gst_object_ref_sink (self);
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return GST_BUFFER_POOL_CAST (self);
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}
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