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win32ipc: Add support for zero-copy rendering

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* 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>
This commit is contained in:
Seungha Yang 2023-01-19 22:22:52 +09:00 committed by GStreamer Marge Bot
parent c32b898cbb
commit c6a6c56cdf
13 changed files with 1324 additions and 140 deletions
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241
subprojects/gst-plugins-bad/sys/win32ipc/gstwin32ipcbufferpool.cpp Normal file
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/* GStreamer
* Copyright (C) 2023 Seungha Yang <seungha@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 "gstwin32ipcbufferpool.h"
#include "gstwin32ipcmemory.h"
#include <gst/video/video.h>
GST_DEBUG_CATEGORY_STATIC (gst_win32_ipc_buffer_pool_debug);
#define GST_CAT_DEFAULT gst_win32_ipc_buffer_pool_debug
struct _GstWin32IpcBufferPool
{
GstBufferPool parent;
GstWin32IpcAllocator *alloc;
GstVideoInfo info;
gboolean add_videometa;
};
#define gst_win32_ipc_buffer_pool_parent_class parent_class
G_DEFINE_TYPE (GstWin32IpcBufferPool,
gst_win32_ipc_buffer_pool, GST_TYPE_BUFFER_POOL);
static void gst_win32_ipc_buffer_pool_dispose (GObject * object);
static const gchar **gst_win32_ipc_buffer_pool_get_options (GstBufferPool *
pool);
static gboolean gst_win32_ipc_buffer_pool_set_config (GstBufferPool * pool,
GstStructure * config);
static GstFlowReturn gst_win32_ipc_buffer_pool_alloc_buffer (GstBufferPool *
pool, GstBuffer ** buffer, GstBufferPoolAcquireParams * params);
static gboolean gst_win32_ipc_buffer_pool_start (GstBufferPool * pool);
static gboolean gst_win32_ipc_buffer_pool_stop (GstBufferPool * pool);
static void
gst_win32_ipc_buffer_pool_class_init (GstWin32IpcBufferPoolClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstBufferPoolClass *bufferpool_class = GST_BUFFER_POOL_CLASS (klass);
gobject_class->dispose = gst_win32_ipc_buffer_pool_dispose;
bufferpool_class->get_options = gst_win32_ipc_buffer_pool_get_options;
bufferpool_class->set_config = gst_win32_ipc_buffer_pool_set_config;
bufferpool_class->alloc_buffer = gst_win32_ipc_buffer_pool_alloc_buffer;
bufferpool_class->start = gst_win32_ipc_buffer_pool_start;
bufferpool_class->stop = gst_win32_ipc_buffer_pool_stop;
GST_DEBUG_CATEGORY_INIT (gst_win32_ipc_buffer_pool_debug,
"win32_ipcbufferpool", 0, "win32_ipcbufferpool object");
}
static void
gst_win32_ipc_buffer_pool_init (GstWin32IpcBufferPool * self)
{
}
static void
gst_win32_ipc_buffer_pool_dispose (GObject * object)
{
GstWin32IpcBufferPool *self = GST_WIN32_IPC_BUFFER_POOL (object);
if (self->alloc) {
gst_win32_ipc_allocator_set_active (self->alloc, FALSE);
gst_clear_object (&self->alloc);
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static const gchar **
gst_win32_ipc_buffer_pool_get_options (GstBufferPool * pool)
{
static const gchar *options[] = { GST_BUFFER_POOL_OPTION_VIDEO_META,
nullptr
};
return options;
}
static gboolean
gst_win32_ipc_buffer_pool_set_config (GstBufferPool * pool,
GstStructure * config)
{
GstWin32IpcBufferPool *self = GST_WIN32_IPC_BUFFER_POOL (pool);
GstVideoInfo info;
GstCaps *caps = nullptr;
gboolean ret = TRUE;
guint size, min_buffers, max_buffers;
if (!gst_buffer_pool_config_get_params (config, &caps, &size, &min_buffers,
&max_buffers)) {
GST_WARNING_OBJECT (pool, "Invalid config");
return FALSE;
}
if (!caps) {
GST_WARNING_OBJECT (pool, "No caps");
return FALSE;
}
/* now parse the caps from the config */
if (!gst_video_info_from_caps (&info, caps)) {
GST_WARNING_OBJECT (self, "Couldn't get video info from caps");
return FALSE;
}
if (size < info.size) {
GST_WARNING_OBJECT (self, "Size is smaller for the caps");
return FALSE;
}
info.size = MAX (size, info.size);
self->info = info;
GST_LOG_OBJECT (pool, "%dx%d, caps %" GST_PTR_FORMAT, info.width, info.height,
caps);
if (self->alloc) {
gst_win32_ipc_allocator_set_active (self->alloc, FALSE);
gst_clear_object (&self->alloc);
}
self->alloc = gst_win32_ipc_allocator_new (size);
if (!self->alloc) {
GST_ERROR_OBJECT (self, "Couldn't create allocator");
return FALSE;
}
self->add_videometa = gst_buffer_pool_config_has_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
gst_buffer_pool_config_set_params (config,
caps, info.size, min_buffers, max_buffers);
return GST_BUFFER_POOL_CLASS (parent_class)->set_config (pool, config) && ret;
}
static GstFlowReturn
gst_win32_ipc_buffer_pool_alloc_buffer (GstBufferPool * pool,
GstBuffer ** buffer, GstBufferPoolAcquireParams * params)
{
GstWin32IpcBufferPool *self = GST_WIN32_IPC_BUFFER_POOL (pool);
GstFlowReturn ret = GST_FLOW_OK;
GstBuffer *buf;
GstMemory *mem = nullptr;
GstVideoInfo *info = &self->info;
ret = gst_win32_ipc_allocator_acquire_memory (self->alloc, &mem);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (self, "Couldn't acquire memory");
return ret;
}
buf = gst_buffer_new ();
gst_buffer_append_memory (buf, mem);
if (self->add_videometa) {
gst_buffer_add_video_meta_full (buf, GST_VIDEO_FRAME_FLAG_NONE,
GST_VIDEO_INFO_FORMAT (info), GST_VIDEO_INFO_WIDTH (info),
GST_VIDEO_INFO_HEIGHT (info), GST_VIDEO_INFO_N_PLANES (info),
info->offset, info->stride);
}
*buffer = buf;
return GST_FLOW_OK;
}
static gboolean
gst_win32_ipc_buffer_pool_start (GstBufferPool * pool)
{
GstWin32IpcBufferPool *self = GST_WIN32_IPC_BUFFER_POOL (pool);
gboolean ret;
GST_DEBUG_OBJECT (self, "Start");
if (!self->alloc) {
GST_ERROR_OBJECT (self, "No allocator");
return FALSE;
}
if (!gst_win32_ipc_allocator_set_active (self->alloc, TRUE)) {
GST_ERROR_OBJECT (self, "Failed to activate allocator");
return FALSE;
}
ret = GST_BUFFER_POOL_CLASS (parent_class)->start (pool);
if (!ret) {
GST_ERROR_OBJECT (self, "Failed to start");
gst_win32_ipc_allocator_set_active (self->alloc, FALSE);
return FALSE;
}
return TRUE;
}
static gboolean
gst_win32_ipc_buffer_pool_stop (GstBufferPool * pool)
{
GstWin32IpcBufferPool *self = GST_WIN32_IPC_BUFFER_POOL (pool);
GST_DEBUG_OBJECT (self, "Stop");
if (self->alloc)
gst_win32_ipc_allocator_set_active (self->alloc, FALSE);
return GST_BUFFER_POOL_CLASS (parent_class)->stop (pool);
}
GstBufferPool *
gst_win32_ipc_buffer_pool_new (void)
{
GstWin32IpcBufferPool *self;
self = (GstWin32IpcBufferPool *)
g_object_new (GST_TYPE_WIN32_IPC_BUFFER_POOL, nullptr);
gst_object_ref_sink (self);
return GST_BUFFER_POOL_CAST (self);
}

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subprojects/gst-plugins-bad/sys/win32ipc/gstwin32ipcbufferpool.h Normal file
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/* GStreamer
* Copyright (C) 2023 Seungha Yang <seungha@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.
*/
#pragma once
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_WIN32_IPC_BUFFER_POOL (gst_win32_ipc_buffer_pool_get_type())
G_DECLARE_FINAL_TYPE (GstWin32IpcBufferPool, gst_win32_ipc_buffer_pool,
GST, WIN32_IPC_BUFFER_POOL, GstBufferPool);
GstBufferPool * gst_win32_ipc_buffer_pool_new (void);
G_END_DECLS

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subprojects/gst-plugins-bad/sys/win32ipc/gstwin32ipcmemory.cpp Normal file
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/* GStreamer
* Copyright (C) 2023 Seungha Yang <seungha@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 "gstwin32ipcmemory.h"
#include "gstwin32ipcutils.h"
#include <string>
#include <mutex>
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (gst_win32_ipc_allocator_debug);
#define GST_CAT_DEFAULT gst_win32_ipc_allocator_debug
#define GST_WIN32_IPC_MEMORY_NAME "Win32IpcMemory"
#define GST_WIN32_IPC_ALLOCATOR_IS_FLUSHING(alloc) \
(g_atomic_int_get (&alloc->flushing))
static GstWin32IpcAllocator *gc_allocator = nullptr;
struct _GstWin32IpcAllocator
{
GstAllocator parent;
guint size;
gboolean is_gc;
GstAtomicQueue *queue;
GstPoll *poll;
gchar *prefix;
LONG64 seq_num;
CRITICAL_SECTION lock;
gboolean started;
gboolean active;
/* atomic */
gint outstanding;
guint max_mems;
guint cur_mems;
gboolean flushing;
};
static void gst_win32_ipc_allocator_finalize (GObject * object);
static GstMemory *gst_win32_ipc_allocator_dummy_alloc (GstAllocator * alloc,
gsize size, GstAllocationParams * params);
static void gst_win32_ipc_allocator_free (GstAllocator * alloc,
GstMemory * mem);
static gpointer gst_win32_ipc_allocator_map (GstMemory * mem, gsize maxsize,
GstMapFlags flags);
static void gst_win32_ipc_allocator_unmap (GstMemory * mem);
static GstMemory *gst_win32_ipc_allocator_share (GstMemory * mem,
gssize offset, gssize size);
static gboolean gst_win32_ipc_allocator_start (GstWin32IpcAllocator * self);
static gboolean gst_win32_ipc_allocator_stop (GstWin32IpcAllocator * self);
static gboolean gst_win32_ipc_memory_release (GstMiniObject * mini_object);
#define gst_win32_ipc_allocator_parent_class parent_class
G_DEFINE_TYPE (GstWin32IpcAllocator, gst_win32_ipc_allocator,
GST_TYPE_ALLOCATOR);
static void
gst_win32_ipc_allocator_class_init (GstWin32IpcAllocatorClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstAllocatorClass *alloc_class = GST_ALLOCATOR_CLASS (klass);
object_class->finalize = gst_win32_ipc_allocator_finalize;
alloc_class->alloc = gst_win32_ipc_allocator_dummy_alloc;
alloc_class->free = gst_win32_ipc_allocator_free;
GST_DEBUG_CATEGORY_INIT (gst_win32_ipc_allocator_debug,
"win32ipcallocator", 0, "win32ipcallocator");
}
static void
gst_win32_ipc_allocator_init (GstWin32IpcAllocator * self)
{
GstAllocator *alloc = GST_ALLOCATOR (self);
alloc->mem_type = GST_WIN32_IPC_MEMORY_NAME;
alloc->mem_map = gst_win32_ipc_allocator_map;
alloc->mem_unmap = gst_win32_ipc_allocator_unmap;
alloc->mem_share = gst_win32_ipc_allocator_share;
GST_OBJECT_FLAG_SET (alloc, GST_ALLOCATOR_FLAG_CUSTOM_ALLOC);
InitializeCriticalSection (&self->lock);
self->poll = gst_poll_new_timer ();
self->queue = gst_atomic_queue_new (16);
self->flushing = 1;
self->active = FALSE;
self->started = FALSE;
/* 1 control write for flushing - the flush token */
gst_poll_write_control (self->poll);
/* 1 control write for marking that we are not waiting for poll - the wait token */
gst_poll_write_control (self->poll);
}
static void
gst_win32_ipc_allocator_finalize (GObject * object)
{
GstWin32IpcAllocator *self = GST_WIN32_IPC_ALLOCATOR (object);
GST_DEBUG_OBJECT (self, "Finalize");
gst_win32_ipc_allocator_stop (self);
gst_atomic_queue_unref (self->queue);
gst_poll_free (self->poll);
DeleteCriticalSection (&self->lock);
g_free (self->prefix);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstMemory *
gst_win32_ipc_allocator_dummy_alloc (GstAllocator * alloc, gsize size,
GstAllocationParams * params)
{
g_return_val_if_reached (nullptr);
}
static void
gst_win32_ipc_allocator_free (GstAllocator * alloc, GstMemory * mem)
{
GstWin32IpcMemory *imem = (GstWin32IpcMemory *) mem;
win32_ipc_mmf_unref (imem->mmf);
g_free (imem);
}
static gpointer
gst_win32_ipc_allocator_map (GstMemory * mem, gsize maxsize, GstMapFlags flags)
{
GstWin32IpcMemory *imem = (GstWin32IpcMemory *) mem;
return win32_ipc_mmf_get_raw (imem->mmf);
}
static void
gst_win32_ipc_allocator_unmap (GstMemory * mem)
{
/* do nothing */
}
static GstMemory *
gst_win32_ipc_allocator_share (GstMemory * mem, gssize offset, gssize size)
{
/* not supported */
return nullptr;
}
static gboolean
gst_win32_ipc_allocator_start (GstWin32IpcAllocator * self)
{
if (self->started)
return TRUE;
self->started = TRUE;
return TRUE;
}
static void
gst_win32_ipc_allocator_do_set_flushing (GstWin32IpcAllocator * self,
gboolean flushing)
{
if (GST_WIN32_IPC_ALLOCATOR_IS_FLUSHING (self) == flushing)
return;
if (flushing) {
g_atomic_int_set (&self->flushing, 1);
/* Write the flush token to wake up any waiters */
gst_poll_write_control (self->poll);
} else {
while (!gst_poll_read_control (self->poll)) {
if (errno == EWOULDBLOCK) {
/* This should not really happen unless flushing and unflushing
* happens on different threads. Let's wait a bit to get back flush
* token from the thread that was setting it to flushing */
g_thread_yield ();
continue;
} else {
/* Critical error but GstPoll already complained */
break;
}
}
g_atomic_int_set (&self->flushing, 0);
}
}
gboolean
gst_win32_ipc_allocator_set_active (GstWin32IpcAllocator * self,
gboolean active)
{
gboolean ret = TRUE;
g_return_val_if_fail (GST_IS_WIN32_IPC_ALLOCATOR (self), FALSE);
EnterCriticalSection (&self->lock);
if (self->active == active)
goto out;
if (active) {
gst_win32_ipc_allocator_start (self);
/* flush_stop may release memory objects, setting to active to avoid running
* do_stop while activating the pool */
self->active = TRUE;
gst_win32_ipc_allocator_do_set_flushing (self, FALSE);
} else {
gint outstanding;
/* set to flushing first */
gst_win32_ipc_allocator_do_set_flushing (self, TRUE);
/* when all memory objects are in the pool, free them. Else they will be
* freed when they are released */
outstanding = g_atomic_int_get (&self->outstanding);
GST_LOG_OBJECT (self, "outstanding memories %d, (in queue %d)",
outstanding, gst_atomic_queue_length (self->queue));
if (outstanding == 0) {
if (!gst_win32_ipc_allocator_stop (self)) {
GST_ERROR_OBJECT (self, "stop failed");
ret = FALSE;
goto out;
}
}
self->active = FALSE;
}
out:
LeaveCriticalSection (&self->lock);
return ret;
}
static void
gst_win32_ipc_allocator_free_memory (GstWin32IpcAllocator * self,
GstMemory * mem)
{
g_atomic_int_add (&self->cur_mems, -1);
GST_LOG_OBJECT (self, "freeing memory %p (%u left)", mem, self->cur_mems);
GST_MINI_OBJECT_CAST (mem)->dispose = nullptr;
gst_memory_unref (mem);
}
/* must be called with the lock */
static gboolean
gst_win32_ipc_allocator_clear_queue (GstWin32IpcAllocator * self)
{
GstMemory *memory;
GST_LOG_OBJECT (self, "Clearing queue");
/* clear the pool */
while ((memory = (GstMemory *) gst_atomic_queue_pop (self->queue))) {
while (!gst_poll_read_control (self->poll)) {
if (errno == EWOULDBLOCK) {
/* We put the memory into the queue but did not finish writing control
* yet, let's wait a bit and retry */
g_thread_yield ();
continue;
} else {
/* Critical error but GstPoll already complained */
break;
}
}
gst_win32_ipc_allocator_free_memory (self, memory);
}
GST_LOG_OBJECT (self, "Clear done");
return self->cur_mems == 0;
}
static gboolean
gst_win32_ipc_allocator_stop (GstWin32IpcAllocator * self)
{
GST_DEBUG_OBJECT (self, "Stop");
if (self->started) {
if (!gst_win32_ipc_allocator_clear_queue (self))
return FALSE;
self->started = FALSE;
}
return TRUE;
}
static void
dec_outstanding (GstWin32IpcAllocator * self)
{
if (g_atomic_int_dec_and_test (&self->outstanding)) {
/* all memory objects are returned to the pool, see if we need to free them */
if (GST_WIN32_IPC_ALLOCATOR_IS_FLUSHING (self)) {
/* take the lock so that set_active is not run concurrently */
EnterCriticalSection (&self->lock);
/* now that we have the lock, check if we have been de-activated with
* outstanding buffers */
if (!self->active)
gst_win32_ipc_allocator_stop (self);
LeaveCriticalSection (&self->lock);
}
}
}
static void
gst_win32_ipc_allocator_release_memory (GstWin32IpcAllocator * self,
GstMemory * mem)
{
GST_MINI_OBJECT_CAST (mem)->dispose = nullptr;
mem->allocator = (GstAllocator *) gst_object_ref (gc_allocator);
/* keep it around in our queue */
gst_atomic_queue_push (self->queue, mem);
gst_poll_write_control (self->poll);
dec_outstanding (self);
gst_object_unref (self);
}
static gboolean
gst_win32_ipc_memory_release (GstMiniObject * mini_object)
{
GstMemory *mem = GST_MEMORY_CAST (mini_object);
GstWin32IpcAllocator *self;
g_assert (mem->allocator != nullptr);
self = GST_WIN32_IPC_ALLOCATOR (mem->allocator);
/* Memory belongs to garbage collector, free this */
if (self->is_gc)
return TRUE;
if (GST_WIN32_IPC_ALLOCATOR_IS_FLUSHING (self))
return TRUE;
/* return the memory to the allocator */
gst_memory_ref (mem);
gst_win32_ipc_allocator_release_memory (self, mem);
return FALSE;
}
static GstFlowReturn
gst_win32_ipc_allocator_alloc (GstWin32IpcAllocator * self, GstMemory ** mem)
{
GstWin32IpcMemory *new_mem;
Win32IpcMmf *mmf;
std::string mmf_name;
mmf_name = std::string (self->prefix) +
std::to_string (InterlockedIncrement64 (&self->seq_num));
mmf = win32_ipc_mmf_alloc (self->size, mmf_name.c_str ());
if (!mmf) {
GST_ERROR_OBJECT (self, "Couldn't allocate memory");
return GST_FLOW_ERROR;
}
memset (win32_ipc_mmf_get_raw (mmf), 0, win32_ipc_mmf_get_size (mmf));
g_atomic_int_add (&self->cur_mems, 1);
new_mem = g_new0 (GstWin32IpcMemory, 1);
gst_memory_init (GST_MEMORY_CAST (new_mem), (GstMemoryFlags) 0,
GST_ALLOCATOR_CAST (gc_allocator), nullptr, self->size, 0, 0, self->size);
new_mem->mmf = mmf;
*mem = GST_MEMORY_CAST (new_mem);
return GST_FLOW_OK;
}
static GstFlowReturn
gst_win32_ipc_allocator_acquire_memory_internal (GstWin32IpcAllocator * self,
GstMemory ** memory)
{
GstFlowReturn result;
while (TRUE) {
if (GST_WIN32_IPC_ALLOCATOR_IS_FLUSHING (self)) {
GST_DEBUG_OBJECT (self, "We are flushing");
return GST_FLOW_FLUSHING;
}
/* try to get a memory from the queue */
*memory = (GstMemory *) gst_atomic_queue_pop (self->queue);
if (*memory) {
while (!gst_poll_read_control (self->poll)) {
if (errno == EWOULDBLOCK) {
/* We put the memory into the queue but did not finish writing control
* yet, let's wait a bit and retry */
g_thread_yield ();
continue;
} else {
/* Critical error but GstPoll already complained */
break;
}
}
result = GST_FLOW_OK;
GST_LOG_OBJECT (self, "acquired memory %p", *memory);
break;
}
/* no memory, try to allocate some more */
GST_LOG_OBJECT (self, "no memory, trying to allocate");
result = gst_win32_ipc_allocator_alloc (self, memory);
if (result == GST_FLOW_OK)
/* we have a memory, return it */
break;
if (G_UNLIKELY (result != GST_FLOW_EOS))
/* something went wrong, return error */
break;
/* now we release the control socket, we wait for a memory release or
* flushing */
if (!gst_poll_read_control (self->poll)) {
if (errno == EWOULDBLOCK) {
/* This means that we have two threads trying to allocate memory
* already, and the other one already got the wait token. This
* means that we only have to wait for the poll now and not write the
* token afterwards: we will be woken up once the other thread is
* woken up and that one will write the wait token it removed */
GST_LOG_OBJECT (self, "waiting for free memory or flushing");
gst_poll_wait (self->poll, GST_CLOCK_TIME_NONE);
} else {
/* This is a critical error, GstPoll already gave a warning */
result = GST_FLOW_ERROR;
break;
}
} else {
/* We're the first thread waiting, we got the wait token and have to
* write it again later
* OR
* We're a second thread and just consumed the flush token and block all
* other threads, in which case we must not wait and give it back
* immediately */
if (!GST_WIN32_IPC_ALLOCATOR_IS_FLUSHING (self)) {
GST_LOG_OBJECT (self, "waiting for free memory or flushing");
gst_poll_wait (self->poll, GST_CLOCK_TIME_NONE);
}
gst_poll_write_control (self->poll);
}
}
return result;
}
gboolean
gst_is_win32_ipc_memory (GstMemory * mem)
{
return mem != nullptr && mem->allocator != nullptr &&
GST_IS_WIN32_IPC_ALLOCATOR (mem->allocator);
}
static void
gst_win32_ipc_allocator_init_once (void)
{
static std::once_flag once_flag;
std::call_once (once_flag,[]() {
gc_allocator = (GstWin32IpcAllocator *)
g_object_new (GST_TYPE_WIN32_IPC_ALLOCATOR, nullptr);
gst_object_ref_sink (gc_allocator);
GST_OBJECT_FLAG_SET (gc_allocator, GST_OBJECT_FLAG_MAY_BE_LEAKED);
gc_allocator->is_gc = TRUE;
});
}
GstWin32IpcAllocator *
gst_win32_ipc_allocator_new (guint size)
{
GstWin32IpcAllocator *self;
g_return_val_if_fail (size != 0, nullptr);
gst_win32_ipc_allocator_init_once ();
self = (GstWin32IpcAllocator *)
g_object_new (GST_TYPE_WIN32_IPC_ALLOCATOR, nullptr);
self->size = size;
self->prefix = gst_win32_ipc_get_mmf_prefix ();
gst_object_ref_sink (self);
return self;
}
GstFlowReturn
gst_win32_ipc_allocator_acquire_memory (GstWin32IpcAllocator * alloc,
GstMemory ** memory)
{
GstFlowReturn ret;
g_return_val_if_fail (GST_IS_WIN32_IPC_ALLOCATOR (alloc), GST_FLOW_ERROR);
g_return_val_if_fail (memory != nullptr, GST_FLOW_ERROR);
*memory = nullptr;
g_atomic_int_inc (&alloc->outstanding);
ret = gst_win32_ipc_allocator_acquire_memory_internal (alloc, memory);
if (ret == GST_FLOW_OK) {
GstMemory *mem = *memory;
/* Replace default allocator with ours */
gst_object_unref (mem->allocator);
mem->allocator = (GstAllocator *) gst_object_ref (alloc);
GST_MINI_OBJECT_CAST (mem)->dispose = gst_win32_ipc_memory_release;
} else {
dec_outstanding (alloc);
}
return ret;
}

50
subprojects/gst-plugins-bad/sys/win32ipc/gstwin32ipcmemory.h Normal file
View file

@ -0,0 +1,50 @@
/* GStreamer
* Copyright (C) 2023 Seungha Yang <seungha@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.
*/
#pragma once
#include <gst/gst.h>
#include "protocol/win32ipcmmf.h"
G_BEGIN_DECLS
#define GST_TYPE_WIN32_IPC_ALLOCATOR (gst_win32_ipc_allocator_get_type())
G_DECLARE_FINAL_TYPE (GstWin32IpcAllocator, gst_win32_ipc_allocator,
GST, WIN32_IPC_ALLOCATOR, GstAllocator);
typedef struct _GstWin32IpcMemory GstWin32IpcMemory;
struct _GstWin32IpcMemory
{
GstMemory mem;
Win32IpcMmf *mmf;
};
gboolean gst_is_win32_ipc_memory (GstMemory * mem);
GstWin32IpcAllocator * gst_win32_ipc_allocator_new (guint size);
gboolean gst_win32_ipc_allocator_set_active (GstWin32IpcAllocator * alloc,
gboolean active);
GstFlowReturn gst_win32_ipc_allocator_acquire_memory (GstWin32IpcAllocator * alloc,
GstMemory ** memory);
G_END_DECLS

131
subprojects/gst-plugins-bad/sys/win32ipc/gstwin32ipcvideosink.cpp
View file

@ -39,6 +39,8 @@
#include "gstwin32ipcvideosink.h"
#include "gstwin32ipcutils.h"
#include "gstwin32ipcbufferpool.h"
#include "gstwin32ipcmemory.h"
#include "protocol/win32ipcpipeserver.h"
#include <string>
#include <string.h>
@ -65,13 +67,13 @@ struct _GstWin32IpcVideoSink
GstVideoInfo info;
Win32IpcPipeServer *pipe;
gchar *mmf_prefix;
guint64 seq_num;
LARGE_INTEGER frequency;
Win32IpcMmf *mmf;
Win32IpcVideoInfo minfo;
GstBufferPool *fallback_pool;
GstBuffer *prepared_buffer;
/* properties */
gchar *pipe_name;
};
@ -222,9 +224,6 @@ gst_win32_ipc_video_sink_start (GstBaseSink * sink)
return FALSE;
}
self->mmf_prefix = gst_win32_ipc_get_mmf_prefix ();
self->seq_num = 0;
return TRUE;
}
@ -236,8 +235,12 @@ gst_win32_ipc_video_sink_stop (GstBaseSink * sink)
GST_DEBUG_OBJECT (self, "Stop");
g_clear_pointer (&self->pipe, win32_ipc_pipe_server_unref);
g_clear_pointer (&self->mmf_prefix, g_free);
g_clear_pointer (&self->mmf, win32_ipc_mmf_unref);
gst_clear_buffer (&self->prepared_buffer);
if (self->fallback_pool) {
gst_buffer_pool_set_active (self->fallback_pool, FALSE);
gst_clear_object (&self->fallback_pool);
}
return TRUE;
}
@ -247,7 +250,7 @@ gst_win32_ipc_video_sink_unlock_stop (GstBaseSink * sink)
{
GstWin32IpcVideoSink *self = GST_WIN32_IPC_VIDEO_SINK (sink);
g_clear_pointer (&self->mmf, win32_ipc_mmf_unref);
gst_clear_buffer (&self->prepared_buffer);
return TRUE;
}
@ -281,6 +284,7 @@ static gboolean
gst_win32_ipc_video_sink_set_caps (GstBaseSink * sink, GstCaps * caps)
{
GstWin32IpcVideoSink *self = GST_WIN32_IPC_VIDEO_SINK (sink);
GstStructure *config;
if (!gst_video_info_from_caps (&self->info, caps)) {
GST_WARNING_OBJECT (self, "Invalid caps");
@ -297,6 +301,19 @@ gst_win32_ipc_video_sink_set_caps (GstBaseSink * sink, GstCaps * caps)
self->minfo.par_n = self->info.par_n;
self->minfo.par_d = self->info.par_d;
if (self->fallback_pool) {
gst_buffer_pool_set_active (self->fallback_pool, FALSE);
gst_object_unref (self->fallback_pool);
}
self->fallback_pool = gst_win32_ipc_buffer_pool_new ();
config = gst_buffer_pool_get_config (self->fallback_pool);
gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
gst_buffer_pool_config_set_params (config, caps, (guint) self->info.size,
0, 0);
gst_buffer_pool_set_config (self->fallback_pool, config);
gst_buffer_pool_set_active (self->fallback_pool, TRUE);
return TRUE;
}
@ -326,7 +343,7 @@ gst_win32_ipc_video_sink_propose_allocation (GstBaseSink * sink,
if (need_pool) {
GstStructure *config;
pool = gst_video_buffer_pool_new ();
pool = gst_win32_ipc_buffer_pool_new ();
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
@ -355,43 +372,83 @@ static GstFlowReturn
gst_win32_ipc_video_sink_prepare (GstBaseSink * sink, GstBuffer * buf)
{
GstWin32IpcVideoSink *self = GST_WIN32_IPC_VIDEO_SINK (sink);
std::string mmf_name;
GstVideoFrame frame;
GstMapInfo info;
GstVideoFrame frame, mmf_frame;
GstMemory *mem;
GstFlowReturn ret;
g_clear_pointer (&self->mmf, win32_ipc_mmf_unref);
gst_clear_buffer (&self->prepared_buffer);
if (!gst_video_frame_map (&frame, &self->info, buf, GST_MAP_READ)) {
GST_ERROR_OBJECT (self, "Couldn't map frame");
return GST_FLOW_ERROR;
}
mmf_name = std::string (self->mmf_prefix) + std::to_string (self->seq_num);
self->seq_num++;
mem = gst_buffer_peek_memory (buf, 0);
if (gst_is_win32_ipc_memory (mem) && gst_buffer_n_memory (buf) == 1) {
GST_LOG_OBJECT (self, "Upstream memory is mmf");
self->mmf = win32_ipc_mmf_alloc (GST_VIDEO_FRAME_SIZE (&frame),
mmf_name.c_str ());
if (!self->mmf) {
GST_ERROR_OBJECT (self, "Couldn't create memory with name %s",
mmf_name.c_str ());
self->prepared_buffer = gst_buffer_ref (buf);
self->minfo.size = GST_VIDEO_FRAME_SIZE (&frame);
for (guint i = 0; i < GST_VIDEO_FRAME_N_PLANES (&frame); i++) {
self->minfo.offset[i] = GST_VIDEO_FRAME_PLANE_OFFSET (&frame, i);
self->minfo.stride[i] = GST_VIDEO_FRAME_PLANE_STRIDE (&frame, i);
}
gst_video_frame_unmap (&frame);
return GST_FLOW_OK;
}
GST_LOG_OBJECT (self, "Copying into mmf buffer");
ret = gst_buffer_pool_acquire_buffer (self->fallback_pool,
&self->prepared_buffer, nullptr);
if (ret != GST_FLOW_OK) {
GST_ERROR_OBJECT (self, "Couldn't acquire buffer");
gst_video_frame_unmap (&frame);
return GST_FLOW_ERROR;
}
self->minfo.size = GST_VIDEO_FRAME_SIZE (&frame);
for (guint i = 0; i < GST_VIDEO_FRAME_N_PLANES (&frame); i++) {
self->minfo.offset[i] = GST_VIDEO_FRAME_PLANE_OFFSET (&frame, i);
self->minfo.stride[i] = GST_VIDEO_FRAME_PLANE_STRIDE (&frame, i);
if (!gst_video_frame_map (&mmf_frame, &self->info, self->prepared_buffer,
GST_MAP_WRITE)) {
GST_ERROR_OBJECT (self, "Couldn't map mmf frame");
gst_video_frame_unmap (&frame);
gst_clear_buffer (&self->prepared_buffer);
return GST_FLOW_ERROR;
}
if (!gst_video_frame_copy (&mmf_frame, &frame)) {
GST_ERROR_OBJECT (self, "Couldn't copy buffer");
gst_video_frame_unmap (&frame);
gst_video_frame_unmap (&mmf_frame);
gst_clear_buffer (&self->prepared_buffer);
return GST_FLOW_ERROR;
}
gst_video_frame_unmap (&frame);
gst_buffer_map (buf, &info, GST_MAP_READ);
memcpy (win32_ipc_mmf_get_raw (self->mmf), info.data, self->minfo.size);
gst_buffer_unmap (buf, &info);
self->minfo.size = GST_VIDEO_FRAME_SIZE (&mmf_frame);
for (guint i = 0; i < GST_VIDEO_FRAME_N_PLANES (&mmf_frame); i++) {
self->minfo.offset[i] = GST_VIDEO_FRAME_PLANE_OFFSET (&mmf_frame, i);
self->minfo.stride[i] = GST_VIDEO_FRAME_PLANE_STRIDE (&mmf_frame, i);
}
gst_video_frame_unmap (&mmf_frame);
return GST_FLOW_OK;
}
static void
gst_win32_ipc_video_sink_mmf_free (void *user_data)
{
GstBuffer *buffer = GST_BUFFER_CAST (user_data);
GST_LOG ("Relese %" GST_PTR_FORMAT, buffer);
gst_buffer_unref (buffer);
}
static GstFlowReturn
gst_win32_ipc_video_sink_render (GstBaseSink * sink, GstBuffer * buf)
{
@ -401,6 +458,20 @@ gst_win32_ipc_video_sink_render (GstBaseSink * sink, GstBuffer * buf)
GstClockTime now_qpc;
GstClockTime buf_pts;
GstClockTime buffer_clock = GST_CLOCK_TIME_NONE;
Win32IpcMmf *mmf;
GstWin32IpcMemory *mem;
if (!self->prepared_buffer) {
GST_ERROR_OBJECT (self, "No prepared buffer");
return GST_FLOW_ERROR;
}
mem = (GstWin32IpcMemory *) gst_buffer_peek_memory (self->prepared_buffer, 0);
g_assert (mem != nullptr);
g_assert (gst_is_win32_ipc_memory (GST_MEMORY_CAST (mem)));
mmf = mem->mmf;
QueryPerformanceCounter (&cur_time);
pts = now_qpc = gst_util_uint64_scale (cur_time.QuadPart, GST_SECOND,
@ -454,7 +525,9 @@ gst_win32_ipc_video_sink_render (GstBaseSink * sink, GstBuffer * buf)
/* win32_ipc_pipe_server_send_mmf() takes ownership of mmf */
if (!win32_ipc_pipe_server_send_mmf (self->pipe,
(Win32IpcMmf *) g_steal_pointer (&self->mmf), &self->minfo)) {
win32_ipc_mmf_ref (mmf), &self->minfo,
g_steal_pointer (&self->prepared_buffer),
gst_win32_ipc_video_sink_mmf_free)) {
GST_ERROR_OBJECT (self, "Couldn't send buffer");
return GST_FLOW_ERROR;
}

34
subprojects/gst-plugins-bad/sys/win32ipc/gstwin32ipcvideosrc.cpp
View file

@ -257,7 +257,11 @@ gst_win32_ipc_video_src_stop (GstBaseSrc * src)
GST_DEBUG_OBJECT (self, "Stop");
g_clear_pointer (&self->pipe, win32_ipc_pipe_client_unref);
if (self->pipe) {
win32_ipc_pipe_client_stop (self->pipe);
g_clear_pointer (&self->pipe, win32_ipc_pipe_client_unref);
}
gst_clear_caps (&self->caps);
if (self->pool) {
gst_buffer_pool_set_active (self->pool, FALSE);
@ -277,7 +281,7 @@ gst_win32_ipc_video_src_unlock (GstBaseSrc * src)
AcquireSRWLockExclusive (&self->lock);
self->flushing = TRUE;
if (self->pipe)
win32_ipc_pipe_client_shutdown (self->pipe);
win32_ipc_pipe_client_set_flushing (self->pipe, TRUE);
ReleaseSRWLockExclusive (&self->lock);
return TRUE;
@ -291,9 +295,9 @@ gst_win32_ipc_video_src_unlock_stop (GstBaseSrc * src)
GST_DEBUG_OBJECT (self, "Unlock stop");
AcquireSRWLockExclusive (&self->lock);
g_clear_pointer (&self->pipe, win32_ipc_pipe_client_unref);
gst_clear_caps (&self->caps);
self->flushing = FALSE;
if (self->pipe)
win32_ipc_pipe_client_set_flushing (self->pipe, FALSE);
ReleaseSRWLockExclusive (&self->lock);
return TRUE;
@ -393,6 +397,20 @@ error:
return FALSE;
}
struct MmfReleaseData
{
Win32IpcPipeClient *pipe;
Win32IpcMmf *mmf;
};
static void
gst_win32_ipc_video_src_release_mmf (MmfReleaseData * data)
{
win32_ipc_pipe_client_release_mmf (data->pipe, data->mmf);
win32_ipc_pipe_client_unref (data->pipe);
delete data;
}
static GstFlowReturn
gst_win32_ipc_video_src_create (GstBaseSrc * src, guint64 offset, guint size,
GstBuffer ** buf)
@ -465,10 +483,14 @@ gst_win32_ipc_video_src_create (GstBaseSrc * src, guint64 offset, guint size,
}
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), mmf,
(GDestroyNotify) win32_ipc_mmf_unref);
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,

2
subprojects/gst-plugins-bad/sys/win32ipc/meson.build
View file

@ -4,6 +4,8 @@ win32ipc_sources = [
'protocol/win32ipcpipeserver.cpp',
'protocol/win32ipcprotocol.cpp',
'protocol/win32ipcutils.cpp',
'gstwin32ipcbufferpool.cpp',
'gstwin32ipcmemory.cpp',
'gstwin32ipcutils.cpp',
'gstwin32ipcvideosink.cpp',
'gstwin32ipcvideosrc.cpp',

191
subprojects/gst-plugins-bad/sys/win32ipc/protocol/win32ipcpipeclient.cpp
View file

@ -66,8 +66,10 @@ struct ClientConnection : public OVERLAPPED
struct Win32IpcPipeClient
{
explicit Win32IpcPipeClient (const std::string & n)
: name (n), ref_count(1), last_err (ERROR_SUCCESS)
: name (n), ref_count(1), last_err (ERROR_SUCCESS), flushing (FALSE)
, stopped (FALSE), io_pending (FALSE)
{
release_event = CreateEventA (nullptr, FALSE, FALSE, nullptr);
cancellable = CreateEventA (nullptr, TRUE, FALSE, nullptr);
conn.pipe = INVALID_HANDLE_VALUE;
conn.self = this;
@ -76,7 +78,21 @@ struct Win32IpcPipeClient
~Win32IpcPipeClient ()
{
GST_DEBUG ("Free client %p", this);
win32_ipc_pipe_client_shutdown (this);
SetEvent (cancellable);
if (thread) {
thread->join ();
thread = nullptr;
}
last_err = ERROR_OPERATION_ABORTED;
while (!queue.empty ()) {
MmfInfo info = queue.front ();
queue.pop ();
win32_ipc_mmf_unref (info.mmf);
}
CloseHandle (release_event);
CloseHandle (cancellable);
}
@ -84,33 +100,63 @@ struct Win32IpcPipeClient
std::condition_variable cond;
std::unique_ptr<std::thread> thread;
std::queue<MmfInfo> queue;
std::queue<std::string> unused_mmf;
std::string name;
ULONG ref_count;
HANDLE release_event;
HANDLE cancellable;
UINT last_err;
BOOL flushing;
BOOL stopped;
BOOL io_pending;
ClientConnection conn;
};
static DWORD
win32_ipc_pipe_client_send_need_data_async (Win32IpcPipeClient * self);
static DWORD
win32_ipc_pipe_client_send_release_data_async (Win32IpcPipeClient * self,
const char * mmf_name);
static VOID WINAPI
win32_ipc_pipe_client_send_read_done_finish (DWORD error_code, DWORD n_bytes,
win32_ipc_pipe_client_send_finish (DWORD error_code, DWORD n_bytes,
LPOVERLAPPED overlapped)
{
ClientConnection *conn = (ClientConnection *) overlapped;
Win32IpcPipeClient *self = conn->self;
std::string unused_mmf;
if (error_code != ERROR_SUCCESS) {
std::string msg = win32_ipc_error_message (error_code);
self->last_err = error_code;
GST_WARNING ("READ-DONE failed with 0x%x (%s)",
self->last_err, msg.c_str ());
GST_WARNING ("Failed with 0x%x (%s)", self->last_err, msg.c_str ());
goto error;
}
GST_TRACE ("READ-DONE sent");
self->lock.lock ();
if (!self->unused_mmf.empty ()) {
unused_mmf = self->unused_mmf.front ();
self->unused_mmf.pop ();
}
self->lock.unlock ();
if (unused_mmf.size () > 0) {
self->last_err = win32_ipc_pipe_client_send_release_data_async (self,
unused_mmf.c_str ());
if (self->last_err != ERROR_SUCCESS)
goto error;
return;
}
/* Don't request data anymore if we are stopped, but keep connection
* to send release data message later */
if (self->stopped) {
GST_DEBUG ("We are stopped");
self->io_pending = FALSE;
return;
}
self->last_err = win32_ipc_pipe_client_send_need_data_async (self);
if (self->last_err != ERROR_SUCCESS)
@ -123,6 +169,32 @@ error:
SetEvent (self->cancellable);
}
static DWORD
win32_ipc_pipe_client_send_release_data_async (Win32IpcPipeClient * self,
const char * mmf_name)
{
ClientConnection *conn = &self->conn;
conn->to_write = win32_ipc_pkt_build_release_data (conn->client_msg,
CONN_BUFFER_SIZE, conn->seq_num, mmf_name);
if (conn->to_write == 0) {
GST_ERROR ("Couldn't build RELEASE-DATA pkt");
return ERROR_BAD_FORMAT;
}
GST_TRACE ("Sending RELEASE-DATA");
if (!WriteFileEx (conn->pipe, conn->client_msg, conn->to_write,
(OVERLAPPED *) conn, win32_ipc_pipe_client_send_finish)) {
UINT last_err = GetLastError ();
std::string msg = win32_ipc_error_message (last_err);
GST_WARNING ("WriteFileEx failed with 0x%x (%s)", last_err, msg.c_str ());
return last_err;
}
return ERROR_SUCCESS;
}
static DWORD
win32_ipc_pipe_client_send_read_done_async (Win32IpcPipeClient * self)
{
@ -138,7 +210,7 @@ win32_ipc_pipe_client_send_read_done_async (Win32IpcPipeClient * self)
GST_TRACE ("Sending READ-DONE");
if (!WriteFileEx (conn->pipe, conn->client_msg, conn->to_write,
(OVERLAPPED *) conn, win32_ipc_pipe_client_send_read_done_finish)) {
(OVERLAPPED *) conn, win32_ipc_pipe_client_send_finish)) {
UINT last_err = GetLastError ();
std::string msg = win32_ipc_error_message (last_err);
@ -171,7 +243,7 @@ win32_ipc_pipe_client_receive_have_data_finish (DWORD error_code, DWORD n_bytes,
if (!win32_ipc_pkt_parse_have_data (conn->server_msg, n_bytes,
&conn->seq_num, mmf_name, &info)) {
self->last_err = ERROR_BAD_FORMAT;
GST_WARNING ("Couldn't parse HAVE-DATA pkg");
GST_WARNING ("Couldn't parse HAVE-DATA pkt");
goto error;
}
@ -285,6 +357,8 @@ win32_ipc_pipe_client_loop (Win32IpcPipeClient * self)
DWORD mode = PIPE_READMODE_MESSAGE;
std::unique_lock<std::mutex> lk (self->lock);
ClientConnection *conn = &self->conn;
HANDLE waitables[2];
DWORD wait_ret;
conn->pipe = CreateFileA (self->name.c_str (),
GENERIC_READ | GENERIC_WRITE, 0, nullptr, OPEN_EXISTING,
@ -319,28 +393,60 @@ win32_ipc_pipe_client_loop (Win32IpcPipeClient * self)
if (self->last_err != ERROR_SUCCESS)
goto out;
self->io_pending = TRUE;
waitables[0] = self->cancellable;
waitables[1] = self->release_event;
do {
/* Enters alertable thread state and wait for I/O completion event
* or cancellable event */
DWORD ret = WaitForSingleObjectEx (self->cancellable, INFINITE, TRUE);
if (ret == WAIT_OBJECT_0) {
wait_ret = WaitForMultipleObjectsEx (2, waitables, FALSE, INFINITE, TRUE);
if (wait_ret == WAIT_OBJECT_0) {
GST_DEBUG ("Operation cancelled");
CancelIoEx (conn->pipe, (OVERLAPPED *) &conn);
break;
} else if (ret != WAIT_IO_COMPLETION) {
GST_WARNING ("Unexpected wait return 0x%x", (UINT) ret);
CancelIoEx (conn->pipe, (OVERLAPPED *) &conn);
break;
goto out;
}
switch (wait_ret) {
case WAIT_OBJECT_0 + 1:
case WAIT_IO_COMPLETION:
{
std::string unused_mmf;
/* If I/O chain is stopped, send release data message here */
if (!self->io_pending) {
lk.lock ();
if (!self->unused_mmf.empty ()) {
unused_mmf = self->unused_mmf.front ();
self->unused_mmf.pop ();
}
lk.unlock ();
}
if (unused_mmf.size () > 0) {
GST_DEBUG ("Sending release data for %s", unused_mmf.c_str ());
self->io_pending = TRUE;
self->last_err = win32_ipc_pipe_client_send_release_data_async (self,
unused_mmf.c_str ());
if (self->last_err != ERROR_SUCCESS)
goto out;
}
break;
}
default:
GST_WARNING ("Unexpected wait return 0x%x", (UINT) wait_ret);
goto out;
}
} while (true);
out:
if (conn->pipe != INVALID_HANDLE_VALUE)
if (conn->pipe != INVALID_HANDLE_VALUE) {
CancelIoEx (conn->pipe, (OVERLAPPED *) &conn);
CloseHandle (conn->pipe);
}
lk.lock ();
self->last_err = ERROR_OPERATION_ABORTED;
conn->pipe = INVALID_HANDLE_VALUE;
self->io_pending = FALSE;
self->cond.notify_all ();
}
@ -401,24 +507,10 @@ win32_ipc_pipe_client_unref (Win32IpcPipeClient * client)
}
void
win32_ipc_pipe_client_shutdown (Win32IpcPipeClient * client)
win32_ipc_pipe_client_set_flushing (Win32IpcPipeClient * client, BOOL flushing)
{
GST_DEBUG ("Shutting down %p", client);
SetEvent (client->cancellable);
if (client->thread) {
client->thread->join ();
client->thread = nullptr;
}
std::lock_guard<std::mutex> lk (client->lock);
client->last_err = ERROR_OPERATION_ABORTED;
while (!client->queue.empty ()) {
MmfInfo info = client->queue.front ();
client->queue.pop ();
win32_ipc_mmf_unref (info.mmf);
}
client->flushing = flushing;
client->cond.notify_all ();
}
@ -432,10 +524,12 @@ win32_ipc_pipe_client_get_mmf (Win32IpcPipeClient * client, Win32IpcMmf ** mmf,
return FALSE;
}
while (client->queue.empty () && client->last_err == ERROR_SUCCESS)
while (client->queue.empty () && client->last_err == ERROR_SUCCESS &&
!client->flushing && !client->stopped) {
client->cond.wait (lk);
}
if (client->last_err != ERROR_SUCCESS || client->queue.empty ())
if (client->queue.empty ())
return FALSE;
MmfInfo mmf_info = client->queue.front ();
@ -446,3 +540,30 @@ win32_ipc_pipe_client_get_mmf (Win32IpcPipeClient * client, Win32IpcMmf ** mmf,
return TRUE;
}
void
win32_ipc_pipe_client_release_mmf (Win32IpcPipeClient * client,
Win32IpcMmf * mmf)
{
std::string name = win32_ipc_mmf_get_name (mmf);
win32_ipc_mmf_unref (mmf);
std::lock_guard<std::mutex> lk (client->lock);
if (client->last_err != ERROR_SUCCESS)
return;
GST_LOG ("Enqueue release data %s", name.c_str ());
client->unused_mmf.push (name);
SetEvent (client->release_event);
}
void
win32_ipc_pipe_client_stop (Win32IpcPipeClient * client)
{
GST_DEBUG ("Stopping %p", client);
std::lock_guard<std::mutex> lk (client->lock);
client->stopped = TRUE;
client->cond.notify_all ();
}

8
subprojects/gst-plugins-bad/sys/win32ipc/protocol/win32ipcpipeclient.h
View file

@ -40,10 +40,16 @@ Win32IpcPipeClient * win32_ipc_pipe_client_ref (Win32IpcPipeClient * client);
void win32_ipc_pipe_client_unref (Win32IpcPipeClient * client);
void win32_ipc_pipe_client_shutdown (Win32IpcPipeClient * client);
void win32_ipc_pipe_client_set_flushing (Win32IpcPipeClient * client,
BOOL flushing);
BOOL win32_ipc_pipe_client_get_mmf (Win32IpcPipeClient * client,
Win32IpcMmf ** mmf,
Win32IpcVideoInfo * info);
void win32_ipc_pipe_client_release_mmf (Win32IpcPipeClient * client,
Win32IpcMmf * mmf);
void win32_ipc_pipe_client_stop (Win32IpcPipeClient * client);
G_END_DECLS

152
subprojects/gst-plugins-bad/sys/win32ipc/protocol/win32ipcpipeserver.cpp
View file

@ -41,22 +41,30 @@ GST_DEBUG_CATEGORY_EXTERN (gst_win32_ipc_debug);
struct MmfInfo
{
explicit MmfInfo (Win32IpcMmf * m, const Win32IpcVideoInfo * i, UINT64 s)
explicit MmfInfo (Win32IpcMmf * m, const Win32IpcVideoInfo * i, UINT64 s,
void * u, Win32IpcMmfDestroy n)
{
mmf = m;
info = *i;
seq_num = s;
user_data = u;
notify = n;
}
~MmfInfo()
{
if (mmf)
win32_ipc_mmf_unref (mmf);
if (notify)
notify (user_data);
}
Win32IpcMmf *mmf = nullptr;
Win32IpcVideoInfo info;
UINT64 seq_num;
void *user_data;
Win32IpcMmfDestroy notify;
};
struct ServerConnection : public OVERLAPPED
@ -73,6 +81,7 @@ struct ServerConnection : public OVERLAPPED
Win32IpcPipeServer *self;
std::shared_ptr<MmfInfo> minfo;
std::vector<std::shared_ptr<MmfInfo>> used_minfo;
HANDLE pipe = INVALID_HANDLE_VALUE;
UINT8 client_msg[CONN_BUFFER_SIZE];
UINT32 to_read = 0;
@ -113,7 +122,7 @@ struct Win32IpcPipeServer
};
static void
win32_ipc_pipe_server_receive_need_data_async (ServerConnection * conn);
win32_ipc_pipe_server_wait_client_msg_async (ServerConnection * conn);
static void
win32_ipc_pipe_server_close_connection (ServerConnection * conn,
@ -139,44 +148,6 @@ win32_ipc_pipe_server_close_connection (ServerConnection * conn,
delete conn;
}
static void WINAPI
win32_ipc_pipe_server_receive_read_done_finish (DWORD error_code, DWORD n_bytes,
LPOVERLAPPED overlapped)
{
ServerConnection *conn = (ServerConnection *) overlapped;
if (error_code != ERROR_SUCCESS) {
std::string msg = win32_ipc_error_message (error_code);
GST_WARNING ("READ-DONE failed with 0x%x (%s)",
(UINT) error_code, msg.c_str ());
win32_ipc_pipe_server_close_connection (conn, TRUE);
return;
}
GST_TRACE ("Got READ-DONE %p", conn);
conn->minfo = nullptr;
/* All done, wait for need-data again */
win32_ipc_pipe_server_receive_need_data_async (conn);
}
static void
win32_ipc_pipe_server_receive_read_done_async (ServerConnection * conn)
{
GST_TRACE ("Waiting READ-DONE %p", conn);
if (!ReadFileEx (conn->pipe, conn->client_msg, CONN_BUFFER_SIZE,
(OVERLAPPED *) conn, win32_ipc_pipe_server_receive_read_done_finish)) {
UINT last_err = GetLastError ();
std::string msg = win32_ipc_error_message (last_err);
GST_WARNING ("ReadFileEx failed with 0x%x (%s)", last_err, msg.c_str ());
win32_ipc_pipe_server_close_connection (conn, TRUE);
}
}
static void WINAPI
win32_ipc_pipe_server_send_have_data_finish (DWORD error_code, DWORD n_bytes,
LPOVERLAPPED overlapped)
@ -194,7 +165,7 @@ win32_ipc_pipe_server_send_have_data_finish (DWORD error_code, DWORD n_bytes,
GST_TRACE ("HAVE-DATA done with %s",
win32_ipc_mmf_get_name (conn->minfo->mmf));
win32_ipc_pipe_server_receive_read_done_async (conn);
win32_ipc_pipe_server_wait_client_msg_async (conn);
}
static void
@ -228,11 +199,13 @@ win32_ipc_pipe_server_send_have_data_async (ServerConnection * conn)
}
static void WINAPI
win32_ipc_pipe_server_receive_need_data_finish (DWORD error_code, DWORD n_bytes,
win32_ipc_pipe_server_wait_client_msg_finish (DWORD error_code, DWORD n_bytes,
LPOVERLAPPED overlapped)
{
ServerConnection *conn = (ServerConnection *) overlapped;
UINT64 seq_num;
Win32IpcPktType type;
char mmf_name[1024];
if (error_code != ERROR_SUCCESS) {
std::string msg = win32_ipc_error_message (error_code);
@ -242,32 +215,74 @@ win32_ipc_pipe_server_receive_need_data_finish (DWORD error_code, DWORD n_bytes,
return;
}
if (!win32_ipc_pkt_parse_need_data (conn->client_msg, CONN_BUFFER_SIZE,
&seq_num)) {
GST_ERROR ("Couldn't parse NEED-DATA message");
win32_ipc_pipe_server_close_connection (conn, TRUE);
return;
type = win32_ipc_pkt_type_from_raw (conn->client_msg[0]);
switch (type) {
case WIN32_IPC_PKT_NEED_DATA:
GST_TRACE ("Got NEED-DATA %p", conn);
if (!win32_ipc_pkt_parse_need_data (conn->client_msg, CONN_BUFFER_SIZE,
&seq_num)) {
GST_ERROR ("Couldn't parse NEED-DATA message");
win32_ipc_pipe_server_close_connection (conn, TRUE);
return;
}
/* Will response later once data is available */
if (!conn->minfo) {
GST_LOG ("No data available, waiting");
conn->pending_have_data = TRUE;
return;
}
win32_ipc_pipe_server_send_have_data_async (conn);
break;
case WIN32_IPC_PKT_READ_DONE:
GST_TRACE ("Got READ-DONE %p", conn);
conn->used_minfo.push_back (conn->minfo);
conn->minfo = nullptr;
/* All done, wait for need-data again */
win32_ipc_pipe_server_wait_client_msg_async (conn);
break;
case WIN32_IPC_PKT_RELEASE_DATA:
{
GST_TRACE ("Got RELEASE-DATA %p", conn);
if (!win32_ipc_pkt_parse_release_data (conn->client_msg, CONN_BUFFER_SIZE,
&seq_num, mmf_name)) {
GST_WARNING ("Couldn't parse RELEASE-DATA mssage");
return;
}
auto it = std::find_if (conn->used_minfo.begin (),
conn->used_minfo.end (), [&](const std::shared_ptr<MmfInfo> info) -> bool {
return strcmp (mmf_name, win32_ipc_mmf_get_name (info->mmf)) == 0;
});
if (it != conn->used_minfo.end ()) {
conn->used_minfo.erase (it);
} else {
GST_WARNING ("Unknown memory name %s", mmf_name);
}
win32_ipc_pipe_server_wait_client_msg_async (conn);
break;
}
default:
GST_WARNING ("Unexpected packet type");
win32_ipc_pipe_server_close_connection (conn, TRUE);
break;
}
GST_TRACE ("Got NEED-DATA");
/* Will response later once data is available */
if (!conn->minfo) {
GST_LOG ("No data available, waiting");
conn->pending_have_data = TRUE;
return;
}
win32_ipc_pipe_server_send_have_data_async (conn);
}
static void
win32_ipc_pipe_server_receive_need_data_async (ServerConnection * conn)
win32_ipc_pipe_server_wait_client_msg_async (ServerConnection * conn)
{
GST_TRACE ("Waiting NEED-DATA");
GST_TRACE ("Waiting client message");
if (!ReadFileEx (conn->pipe, conn->client_msg, CONN_BUFFER_SIZE,
(OVERLAPPED *) conn, win32_ipc_pipe_server_receive_need_data_finish)) {
(OVERLAPPED *) conn, win32_ipc_pipe_server_wait_client_msg_finish)) {
UINT last_err = GetLastError ();
std::string msg = win32_ipc_error_message (last_err);
@ -350,13 +365,13 @@ win32_ipc_pipe_server_loop (Win32IpcPipeServer * self)
self->cond.notify_all ();
lk.unlock ();
waitables[0] = overlap.hEvent;
waitables[1] = self->enqueue_event;
waitables[2] = self->cancellable;
do {
ServerConnection *conn;
waitables[0] = overlap.hEvent;
waitables[1] = self->enqueue_event;
waitables[2] = self->cancellable;
/* Enters alertable state and wait for
* 1) Client's connection request
* (similar to socket listen/accept in async manner)
@ -393,7 +408,7 @@ win32_ipc_pipe_server_loop (Win32IpcPipeServer * self)
pipe = INVALID_HANDLE_VALUE;
self->conn.push_back (conn);
win32_ipc_pipe_server_receive_need_data_async (conn);
win32_ipc_pipe_server_wait_client_msg_async (conn);
pipe = win32_ipc_pipe_server_create_pipe (self, &overlap, &io_pending);
if (pipe == INVALID_HANDLE_VALUE)
goto out;
@ -534,10 +549,11 @@ win32_ipc_pipe_server_shutdown (Win32IpcPipeServer * server)
BOOL
win32_ipc_pipe_server_send_mmf (Win32IpcPipeServer * server, Win32IpcMmf * mmf,
const Win32IpcVideoInfo * info)
const Win32IpcVideoInfo * info, void * user_data, Win32IpcMmfDestroy notify)
{
std::lock_guard<std::mutex> lk (server->lock);
server->minfo = std::make_shared<MmfInfo> (mmf, info, server->seq_num);
server->minfo = std::make_shared<MmfInfo> (mmf, info, server->seq_num,
user_data, notify);
GST_LOG ("Enqueue mmf %s", win32_ipc_mmf_get_name (mmf));

6
subprojects/gst-plugins-bad/sys/win32ipc/protocol/win32ipcpipeserver.h
View file

@ -34,6 +34,8 @@ G_BEGIN_DECLS
struct Win32IpcPipeServer;
typedef void (*Win32IpcMmfDestroy) (void * user_data);
Win32IpcPipeServer * win32_ipc_pipe_server_new (const char * pipe_name);
Win32IpcPipeServer * win32_ipc_pipe_server_ref (Win32IpcPipeServer * server);
@ -44,7 +46,9 @@ void win32_ipc_pipe_server_shutdown (Win32IpcPipeServer * server
BOOL win32_ipc_pipe_server_send_mmf (Win32IpcPipeServer * server,
Win32IpcMmf * mmf,
const Win32IpcVideoInfo * info);
const Win32IpcVideoInfo * info,
void * user_data,
Win32IpcMmfDestroy notify);
G_END_DECLS

55
subprojects/gst-plugins-bad/sys/win32ipc/protocol/win32ipcprotocol.cpp
View file

@ -35,6 +35,8 @@ win32_ipc_pkt_type_to_string (Win32IpcPktType type)
return "HAVE-DATA";
case WIN32_IPC_PKT_READ_DONE:
return "READ-DONE";
case WIN32_IPC_PKT_RELEASE_DATA:
return "RELEASE-DATA";
default:
break;
}
@ -235,3 +237,56 @@ win32_ipc_pkt_parse_read_done (UINT8 * pkt, UINT32 pkt_len, UINT64 * seq_num)
return TRUE;
}
UINT32
win32_ipc_pkt_build_release_data (UINT8 * pkt, UINT32 pkt_size, UINT64 seq_num,
const char * mmf_name)
{
UINT8 *data = pkt;
size_t len;
if (!pkt || !mmf_name)
return 0;
len = strlen (mmf_name);
if (len == 0)
return 0;
len++;
data[0] = win32_ipc_pkt_type_to_raw (WIN32_IPC_PKT_RELEASE_DATA);
data++;
WRITE_UINT64 (data, seq_num);
strcpy ((char *) data, mmf_name);
data += len;
return data - pkt;
}
BOOL
win32_ipc_pkt_parse_release_data (UINT8 * pkt, UINT32 pkt_size,
UINT64 * seq_num, char * mmf_name)
{
UINT8 *data = pkt;
size_t len;
if (win32_ipc_pkt_type_from_raw (pkt[0]) != WIN32_IPC_PKT_RELEASE_DATA)
return FALSE;
data++;
READ_UINT64 (data, seq_num);
len = strnlen ((const char *) data, pkt_size - (data - pkt));
if (len == 0)
return FALSE;
len++;
strcpy (mmf_name, (const char *) data);
data += len;
return TRUE;
}

17
subprojects/gst-plugins-bad/sys/win32ipc/protocol/win32ipcprotocol.h
View file

@ -47,6 +47,12 @@ G_BEGIN_DECLS
* shared-memory | |
* +------->+ |
* |--------- READ-DONE ---------->|
* | |
* +--------+ |
* release | |
* shared-memory | |
* +--------| |
* |------- RELEASE-Data---------->|
*/
typedef enum
@ -55,6 +61,7 @@ typedef enum
WIN32_IPC_PKT_NEED_DATA,
WIN32_IPC_PKT_HAVE_DATA,
WIN32_IPC_PKT_READ_DONE,
WIN32_IPC_PKT_RELEASE_DATA,
} Win32IpcPktType;
/* Same as GstVideoFormat */
@ -239,5 +246,15 @@ BOOL win32_ipc_pkt_parse_read_done (UINT8 * pkt,
UINT32 pkt_size,
UINT64 * seq_num);
UINT32 win32_ipc_pkt_build_release_data (UINT8 * pkt,
UINT32 pkt_size,
UINT64 seq_num,
const char * mmf_name);
BOOL win32_ipc_pkt_parse_release_data (UINT8 * pkt,
UINT32 pkt_size,
UINT64 * seq_num,
char * mmf_name);
G_END_DECLS