mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-29 05:01:23 +00:00
d3d11memory: Remove GstPoll from GstD3D11PoolAllocator
GstBufferPool implementation was referenced for this GstD3D11PoolAllocator,
for example GstAtomicQueue, various atomic operations, and GstPoll ones.
However, such combination seems to be almost pointless
since gst_poll_{read,write}_control() takes mutex and also
GstPoll uses Win32 event handle internally.
Use simple SRWLOCK and CONDITION_VARIABLE instead, and don't make things
complicated/inefficient.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2887>
This commit is contained in:
Seungha Yang
parent
3c739b9b76
commit
76d1257cd3
1 changed files with 104 additions and 222 deletions
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@ -29,6 +29,8 @@
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#include "gstd3d11-private.h"
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#include <map>
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#include <memory>
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#include <queue>
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#include <atomic>
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/**
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* SECTION:gstd3d11memory
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@ -1862,37 +1864,41 @@ gst_d3d11_allocator_set_active (GstD3D11Allocator * allocator, gboolean active)
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}
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/* GstD3D11PoolAllocator */
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#define GST_D3D11_POOL_ALLOCATOR_GET_LOCK(alloc) \
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(&(GST_D3D11_POOL_ALLOCATOR_CAST(alloc)->priv->lock))
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#define GST_D3D11_POOL_ALLOCATOR_IS_FLUSHING(alloc) (g_atomic_int_get (&alloc->priv->flushing))
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/* *INDENT-OFF* */
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struct _GstD3D11PoolAllocatorPrivate
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{
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_GstD3D11PoolAllocatorPrivate ()
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{
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outstanding = 0;
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}
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~_GstD3D11PoolAllocatorPrivate ()
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{
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GST_D3D11_CLEAR_COM (texture);
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}
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/* parent texture when array typed memory is used */
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ID3D11Texture2D *texture;
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ID3D11Texture2D *texture = nullptr;
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D3D11_TEXTURE2D_DESC desc;
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/* All below member variables are analogous to that of GstBufferPool */
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GstAtomicQueue *queue;
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GstPoll *poll;
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std::queue<GstMemory *> queue;
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/* This lock will protect all below variables apart from atomic ones
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* (identical to GstBufferPool::priv::rec_lock) */
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CRITICAL_SECTION lock;
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gboolean started;
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gboolean active;
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SRWLOCK lock = SRWLOCK_INIT;
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CONDITION_VARIABLE cond = CONDITION_VARIABLE_INIT;
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gboolean started = FALSE;
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gboolean active = FALSE;
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/* atomic */
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gint outstanding;
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guint max_mems;
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guint cur_mems;
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gboolean flushing;
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std::atomic<guint> outstanding;
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guint cur_mems = 0;
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gboolean flushing = FALSE;
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/* Calculated memory size, based on Direct3D11 staging texture map.
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* Note that, we cannot know the actually staging texture memory size prior
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* to map the staging texture because driver will likely require padding */
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gsize mem_size;
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gsize mem_size = 0;
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guint mem_pitch = 0;
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};
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/* *INDENT-ON* */
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static void gst_d3d11_pool_allocator_finalize (GObject * object);
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@ -1905,8 +1911,8 @@ static gboolean gst_d3d11_pool_allocator_stop (GstD3D11PoolAllocator * self);
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static gboolean gst_d3d11_memory_release (GstMiniObject * mini_object);
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#define gst_d3d11_pool_allocator_parent_class pool_alloc_parent_class
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G_DEFINE_TYPE_WITH_PRIVATE (GstD3D11PoolAllocator,
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gst_d3d11_pool_allocator, GST_TYPE_D3D11_ALLOCATOR);
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G_DEFINE_TYPE (GstD3D11PoolAllocator, gst_d3d11_pool_allocator,
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GST_TYPE_D3D11_ALLOCATOR);
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static void
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gst_d3d11_pool_allocator_class_init (GstD3D11PoolAllocatorClass * klass)
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@ -1920,47 +1926,27 @@ gst_d3d11_pool_allocator_class_init (GstD3D11PoolAllocatorClass * klass)
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}
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static void
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gst_d3d11_pool_allocator_init (GstD3D11PoolAllocator * allocator)
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gst_d3d11_pool_allocator_init (GstD3D11PoolAllocator * self)
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{
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GstD3D11PoolAllocatorPrivate *priv;
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priv = allocator->priv = (GstD3D11PoolAllocatorPrivate *)
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gst_d3d11_pool_allocator_get_instance_private (allocator);
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InitializeCriticalSection (&priv->lock);
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priv->poll = gst_poll_new_timer ();
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priv->queue = gst_atomic_queue_new (16);
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priv->flushing = 1;
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priv->active = FALSE;
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priv->started = FALSE;
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/* 1 control write for flushing - the flush token */
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gst_poll_write_control (priv->poll);
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/* 1 control write for marking that we are not waiting for poll - the wait token */
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gst_poll_write_control (priv->poll);
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self->priv = new GstD3D11PoolAllocatorPrivate ();
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}
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static void
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gst_d3d11_pool_allocator_finalize (GObject * object)
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{
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GstD3D11PoolAllocator *self = GST_D3D11_POOL_ALLOCATOR (object);
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GstD3D11PoolAllocatorPrivate *priv = self->priv;
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GST_DEBUG_OBJECT (self, "Finalize");
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gst_d3d11_pool_allocator_stop (self);
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gst_atomic_queue_unref (priv->queue);
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gst_poll_free (priv->poll);
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DeleteCriticalSection (&priv->lock);
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GST_D3D11_CLEAR_COM (priv->texture);
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delete self->priv;
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gst_clear_object (&self->device);
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G_OBJECT_CLASS (pool_alloc_parent_class)->finalize (object);
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}
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/* must be called with the lock */
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static gboolean
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gst_d3d11_pool_allocator_start (GstD3D11PoolAllocator * self)
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{
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@ -2004,15 +1990,16 @@ gst_d3d11_pool_allocator_start (GstD3D11PoolAllocator * self)
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}
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priv->mem_size = mem->size;
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priv->mem_pitch = GST_D3D11_MEMORY_CAST (mem)->priv->map.RowPitch;
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} else {
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mem->size = mem->maxsize = priv->mem_size;
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GST_D3D11_MEMORY_CAST (mem)->priv->map.RowPitch = priv->mem_pitch;
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}
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GST_D3D11_MEMORY_CAST (mem)->priv->subresource_index = i;
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g_atomic_int_add (&priv->cur_mems, 1);
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gst_atomic_queue_push (priv->queue, mem);
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gst_poll_write_control (priv->poll);
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priv->cur_mems++;
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priv->queue.push (mem);
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}
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priv->started = TRUE;
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@ -2020,37 +2007,6 @@ gst_d3d11_pool_allocator_start (GstD3D11PoolAllocator * self)
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return TRUE;
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}
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static void
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gst_d3d11_pool_allocator_do_set_flushing (GstD3D11PoolAllocator * self,
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gboolean flushing)
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{
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GstD3D11PoolAllocatorPrivate *priv = self->priv;
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if (GST_D3D11_POOL_ALLOCATOR_IS_FLUSHING (self) == flushing)
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return;
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if (flushing) {
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g_atomic_int_set (&priv->flushing, 1);
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/* Write the flush token to wake up any waiters */
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gst_poll_write_control (priv->poll);
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} else {
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while (!gst_poll_read_control (priv->poll)) {
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if (errno == EWOULDBLOCK) {
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/* This should not really happen unless flushing and unflushing
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* happens on different threads. Let's wait a bit to get back flush
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* token from the thread that was setting it to flushing */
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g_thread_yield ();
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continue;
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} else {
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/* Critical error but GstPoll already complained */
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break;
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}
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}
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g_atomic_int_set (&priv->flushing, 0);
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}
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}
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static gboolean
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gst_d3d11_pool_allocator_set_active (GstD3D11Allocator * allocator,
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gboolean active)
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@ -2060,7 +2016,7 @@ gst_d3d11_pool_allocator_set_active (GstD3D11Allocator * allocator,
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GST_LOG_OBJECT (self, "active %d", active);
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GstD3D11CSLockGuard lk (GST_D3D11_POOL_ALLOCATOR_GET_LOCK (self));
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GstD3D11SRWLockGuard lk (&priv->lock);
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/* just return if we are already in the right state */
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if (priv->active == active)
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return TRUE;
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@ -2071,76 +2027,57 @@ gst_d3d11_pool_allocator_set_active (GstD3D11Allocator * allocator,
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return FALSE;
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}
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/* flush_stop may release memory objects, setting to active to avoid running
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* do_stop while activating the pool */
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priv->active = TRUE;
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gst_d3d11_pool_allocator_do_set_flushing (self, FALSE);
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priv->flushing = FALSE;
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} else {
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gint outstanding;
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/* set to flushing first */
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gst_d3d11_pool_allocator_do_set_flushing (self, TRUE);
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priv->flushing = TRUE;
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priv->active = FALSE;
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WakeAllConditionVariable (&priv->cond);
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/* when all memory objects are in the pool, free them. Else they will be
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* freed when they are released */
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outstanding = g_atomic_int_get (&priv->outstanding);
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GST_LOG_OBJECT (self, "outstanding memories %d, (in queue %d)",
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outstanding, gst_atomic_queue_length (priv->queue));
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if (outstanding == 0) {
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GST_LOG_OBJECT (self, "outstanding memories %d, (in queue %u)",
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priv->outstanding.load (), (guint) priv->queue.size ());
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if (priv->outstanding == 0) {
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if (!gst_d3d11_pool_allocator_stop (self)) {
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GST_ERROR_OBJECT (self, "stop failed");
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return FALSE;
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}
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}
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priv->active = FALSE;
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}
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return TRUE;
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}
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/* must be called with the lock */
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static void
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gst_d3d11_pool_allocator_free_memory (GstD3D11PoolAllocator * self,
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GstMemory * mem)
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{
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GstD3D11PoolAllocatorPrivate *priv = self->priv;
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g_atomic_int_add (&priv->cur_mems, -1);
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priv->cur_mems--;
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GST_LOG_OBJECT (self, "freeing memory %p (%u left)", mem, priv->cur_mems);
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GST_MINI_OBJECT_CAST (mem)->dispose = NULL;
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GST_MINI_OBJECT_CAST (mem)->dispose = nullptr;
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gst_memory_unref (mem);
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}
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/* must be called with the lock */
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static gboolean
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static void
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gst_d3d11_pool_allocator_clear_queue (GstD3D11PoolAllocator * self)
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{
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GstD3D11PoolAllocatorPrivate *priv = self->priv;
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GstMemory *memory;
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GST_LOG_OBJECT (self, "Clearing queue");
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/* clear the pool */
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while ((memory = (GstMemory *) gst_atomic_queue_pop (priv->queue))) {
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while (!gst_poll_read_control (priv->poll)) {
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if (errno == EWOULDBLOCK) {
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/* We put the memory into the queue but did not finish writing control
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* yet, let's wait a bit and retry */
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g_thread_yield ();
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continue;
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} else {
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/* Critical error but GstPoll already complained */
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break;
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}
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}
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gst_d3d11_pool_allocator_free_memory (self, memory);
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while (!priv->queue.empty ()) {
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GstMemory *mem = priv->queue.front ();
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priv->queue.pop ();
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gst_d3d11_pool_allocator_free_memory (self, mem);
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}
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GST_LOG_OBJECT (self, "Clear done");
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return priv->cur_mems == 0;
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}
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/* must be called with the lock */
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@ -2152,8 +2089,7 @@ gst_d3d11_pool_allocator_stop (GstD3D11PoolAllocator * self)
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GST_DEBUG_OBJECT (self, "Stop");
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if (priv->started) {
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if (!gst_d3d11_pool_allocator_clear_queue (self))
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return FALSE;
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gst_d3d11_pool_allocator_clear_queue (self);
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priv->started = FALSE;
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} else {
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@ -2163,46 +2099,35 @@ gst_d3d11_pool_allocator_stop (GstD3D11PoolAllocator * self)
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return TRUE;
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}
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static inline void
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dec_outstanding (GstD3D11PoolAllocator * self)
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{
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if (g_atomic_int_dec_and_test (&self->priv->outstanding)) {
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/* all memory objects are returned to the pool, see if we need to free them */
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if (GST_D3D11_POOL_ALLOCATOR_IS_FLUSHING (self)) {
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/* take the lock so that set_active is not run concurrently */
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GstD3D11CSLockGuard lk (GST_D3D11_POOL_ALLOCATOR_GET_LOCK (self));
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/* now that we have the lock, check if we have been de-activated with
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* outstanding buffers */
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if (!self->priv->active)
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gst_d3d11_pool_allocator_stop (self);
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}
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}
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}
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/* Must be called with the lock and unlocked in this method */
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static void
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gst_d3d11_pool_allocator_release_memory (GstD3D11PoolAllocator * self,
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GstMemory * mem)
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{
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GstD3D11PoolAllocatorPrivate *priv = self->priv;
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GST_LOG_OBJECT (self, "Released memory %p", mem);
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GST_MINI_OBJECT_CAST (mem)->dispose = NULL;
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GST_MINI_OBJECT_CAST (mem)->dispose = nullptr;
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mem->allocator = (GstAllocator *) gst_object_ref (_d3d11_memory_allocator);
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/* keep it around in our queue */
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gst_atomic_queue_push (self->priv->queue, mem);
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gst_poll_write_control (self->priv->poll);
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dec_outstanding (self);
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priv->queue.push (mem);
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priv->outstanding--;
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WakeAllConditionVariable (&priv->cond);
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ReleaseSRWLockExclusive (&priv->lock);
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gst_object_unref (self);
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}
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static gboolean
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gst_d3d11_memory_release (GstMiniObject * mini_object)
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gst_d3d11_memory_release (GstMiniObject * object)
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{
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GstMemory *mem = GST_MEMORY_CAST (mini_object);
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GstMemory *mem = GST_MEMORY_CAST (object);
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GstD3D11PoolAllocator *alloc;
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GstD3D11PoolAllocatorPrivate *priv;
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g_assert (mem->allocator != NULL);
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g_assert (mem->allocator);
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if (!GST_IS_D3D11_POOL_ALLOCATOR (mem->allocator)) {
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GST_LOG_OBJECT (mem->allocator, "Not our memory, free");
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@ -2210,8 +2135,12 @@ gst_d3d11_memory_release (GstMiniObject * mini_object)
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}
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alloc = GST_D3D11_POOL_ALLOCATOR (mem->allocator);
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priv = alloc->priv;
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AcquireSRWLockExclusive (&priv->lock);
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/* if flushing, free this memory */
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if (GST_D3D11_POOL_ALLOCATOR_IS_FLUSHING (alloc)) {
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if (alloc->priv->flushing) {
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ReleaseSRWLockExclusive (&priv->lock);
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GST_LOG_OBJECT (alloc, "allocator is flushing, free %p", mem);
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return TRUE;
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}
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@ -2223,6 +2152,7 @@ gst_d3d11_memory_release (GstMiniObject * mini_object)
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return FALSE;
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}
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/* must be called with the lock */
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static GstFlowReturn
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gst_d3d11_pool_allocator_alloc (GstD3D11PoolAllocator * self, GstMemory ** mem)
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{
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@ -2233,13 +2163,10 @@ gst_d3d11_pool_allocator_alloc (GstD3D11PoolAllocator * self, GstMemory ** mem)
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if (priv->desc.ArraySize > 1)
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return GST_FLOW_EOS;
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/* increment the allocation counter */
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g_atomic_int_add (&priv->cur_mems, 1);
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new_mem = gst_d3d11_allocator_alloc_internal (_d3d11_memory_allocator,
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self->device, &priv->desc, nullptr);
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if (!new_mem) {
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GST_ERROR_OBJECT (self, "Failed to allocate new memory");
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g_atomic_int_add (&priv->cur_mems, -1);
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return GST_FLOW_ERROR;
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}
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@ -2247,101 +2174,60 @@ gst_d3d11_pool_allocator_alloc (GstD3D11PoolAllocator * self, GstMemory ** mem)
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if (!gst_d3d11_memory_update_size (new_mem)) {
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GST_ERROR_OBJECT (self, "Failed to calculate size");
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gst_memory_unref (new_mem);
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g_atomic_int_add (&priv->cur_mems, -1);
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return GST_FLOW_ERROR;
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}
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priv->mem_size = new_mem->size;
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priv->mem_pitch = GST_D3D11_MEMORY_CAST (new_mem)->priv->map.RowPitch;
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} else {
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new_mem->size = new_mem->maxsize = priv->mem_size;
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GST_D3D11_MEMORY_CAST (new_mem)->priv->map.RowPitch = priv->mem_pitch;
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}
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new_mem->size = new_mem->maxsize = priv->mem_size;
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priv->cur_mems++;
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*mem = new_mem;
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return GST_FLOW_OK;
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}
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/* must be called with the lock */
|
||||
static GstFlowReturn
|
||||
gst_d3d11_pool_allocator_acquire_memory_internal (GstD3D11PoolAllocator * self,
|
||||
GstMemory ** memory)
|
||||
{
|
||||
GstFlowReturn result;
|
||||
GstD3D11PoolAllocatorPrivate *priv = self->priv;
|
||||
GstFlowReturn ret = GST_FLOW_ERROR;
|
||||
|
||||
while (TRUE) {
|
||||
if (G_UNLIKELY (GST_D3D11_POOL_ALLOCATOR_IS_FLUSHING (self)))
|
||||
goto flushing;
|
||||
do {
|
||||
if (priv->flushing) {
|
||||
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 (priv->queue);
|
||||
if (G_LIKELY (*memory)) {
|
||||
while (!gst_poll_read_control (priv->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;
|
||||
if (!priv->queue.empty ()) {
|
||||
*memory = priv->queue.front ();
|
||||
priv->queue.pop ();
|
||||
GST_LOG_OBJECT (self, "acquired memory %p", *memory);
|
||||
break;
|
||||
return GST_FLOW_OK;
|
||||
}
|
||||
|
||||
/* no memory, try to allocate some more */
|
||||
GST_LOG_OBJECT (self, "no memory, trying to allocate");
|
||||
result = gst_d3d11_pool_allocator_alloc (self, memory);
|
||||
if (G_LIKELY (result == GST_FLOW_OK))
|
||||
/* we have a memory, return it */
|
||||
break;
|
||||
ret = gst_d3d11_pool_allocator_alloc (self, memory);
|
||||
if (ret == GST_FLOW_OK)
|
||||
return ret;
|
||||
|
||||
if (G_UNLIKELY (result != GST_FLOW_EOS))
|
||||
/* something went wrong, return error */
|
||||
if (ret != GST_FLOW_EOS)
|
||||
break;
|
||||
|
||||
/* now we release the control socket, we wait for a memory release or
|
||||
* flushing */
|
||||
if (!gst_poll_read_control (priv->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 (priv->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_D3D11_POOL_ALLOCATOR_IS_FLUSHING (self)) {
|
||||
GST_LOG_OBJECT (self, "waiting for free memory or flushing");
|
||||
gst_poll_wait (priv->poll, GST_CLOCK_TIME_NONE);
|
||||
}
|
||||
gst_poll_write_control (priv->poll);
|
||||
}
|
||||
}
|
||||
SleepConditionVariableSRW (&priv->cond, &priv->lock, INFINITE, 0);
|
||||
} while (TRUE);
|
||||
|
||||
return result;
|
||||
|
||||
/* ERRORS */
|
||||
flushing:
|
||||
{
|
||||
GST_DEBUG_OBJECT (self, "we are flushing");
|
||||
return GST_FLOW_FLUSHING;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -2391,31 +2277,27 @@ GstFlowReturn
|
|||
gst_d3d11_pool_allocator_acquire_memory (GstD3D11PoolAllocator * allocator,
|
||||
GstMemory ** memory)
|
||||
{
|
||||
GstFlowReturn ret;
|
||||
GstD3D11PoolAllocatorPrivate *priv;
|
||||
GstFlowReturn result;
|
||||
|
||||
g_return_val_if_fail (GST_IS_D3D11_POOL_ALLOCATOR (allocator),
|
||||
GST_FLOW_ERROR);
|
||||
g_return_val_if_fail (memory != NULL, GST_FLOW_ERROR);
|
||||
g_return_val_if_fail (memory != nullptr, GST_FLOW_ERROR);
|
||||
|
||||
priv = allocator->priv;
|
||||
|
||||
/* assume we'll have one more outstanding buffer we need to do that so
|
||||
* that concurrent set_active doesn't clear the buffers */
|
||||
g_atomic_int_inc (&priv->outstanding);
|
||||
result = gst_d3d11_pool_allocator_acquire_memory_internal (allocator, memory);
|
||||
|
||||
if (result == GST_FLOW_OK) {
|
||||
GstD3D11SRWLockGuard lk (&priv->lock);
|
||||
ret = gst_d3d11_pool_allocator_acquire_memory_internal (allocator, 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 (allocator);
|
||||
GST_MINI_OBJECT_CAST (mem)->dispose = gst_d3d11_memory_release;
|
||||
} else {
|
||||
dec_outstanding (allocator);
|
||||
allocator->priv->outstanding++;
|
||||
}
|
||||
|
||||
return result;
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -2448,7 +2330,7 @@ gst_d3d11_pool_allocator_get_pool_size (GstD3D11PoolAllocator * allocator,
|
|||
}
|
||||
|
||||
if (outstanding_size)
|
||||
*outstanding_size = g_atomic_int_get (&priv->outstanding);
|
||||
*outstanding_size = priv->outstanding;
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue