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dxgiscreencapsrc: renegotiate caps on resolution change

Browse source 
When desktop gets resized, recreate the textures and renegotiate the
source caps with the updated video dimensions.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2249>
This commit is contained in:
Jakub Adam 2021-05-14 20:22:26 +02:00
parent 3bca4045e5
commit fa05f19f14
3 changed files with 75 additions and 32 deletions
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49
sys/winscreencap/dxgicapture.c
View file

@ -206,11 +206,12 @@ gst_dxgicap_shader_init (void)
return ! !GstD3DCompileFunc;
}
static gboolean
static GstFlowReturn
initialize_output_duplication (DxgiCapture * self)
{
HDESK hdesk;
HRESULT hr;
DXGI_OUTDUPL_DESC old_dupl_desc;
GstDXGIScreenCapSrc *src = self->src;
PTR_RELEASE (self->dxgi_dupl);
@ -235,10 +236,29 @@ initialize_output_duplication (DxgiCapture * self)
GST_WARNING_OBJECT (src, "IDXGIOutput1::DuplicateOutput() failed (%x): %s",
(guint) hr, msg);
g_free (msg);
return FALSE;
if (hr == E_ACCESSDENIED) {
/* Happens temporarily during resolution changes. */
return GST_FLOW_OK;
}
return GST_FLOW_ERROR;
}
return TRUE;
old_dupl_desc = self->dupl_desc;
IDXGIOutputDuplication_GetDesc (self->dxgi_dupl, &self->dupl_desc);
if (self->readable_texture &&
(self->dupl_desc.ModeDesc.Width != old_dupl_desc.ModeDesc.Width ||
self->dupl_desc.ModeDesc.Height != old_dupl_desc.ModeDesc.Height ||
self->dupl_desc.Rotation != old_dupl_desc.Rotation)) {
PTR_RELEASE (self->readable_texture);
PTR_RELEASE (self->work_texture);
_setup_texture (self);
return GST_DXGICAP_FLOW_RESOLUTION_CHANGE;
}
return GST_FLOW_OK;
}
DxgiCapture *
@ -314,11 +334,10 @@ dxgicap_new (HMONITOR monitor, GstDXGIScreenCapSrc * src)
PTR_RELEASE (dxgi_factory1);
if (!initialize_output_duplication (self)) {
if (initialize_output_duplication (self) == GST_FLOW_ERROR) {
goto new_error;
}
IDXGIOutputDuplication_GetDesc (self->dxgi_dupl, &self->dupl_desc);
self->pointer_buffer_capacity = INITIAL_POINTER_BUFFER_CAPACITY;
self->pointer_buffer = g_malloc (self->pointer_buffer_capacity);
if (NULL == self->pointer_buffer) {
@ -451,11 +470,11 @@ dxgicap_stop (DxgiCapture * self)
PTR_RELEASE (self->work_texture);
}
gboolean
GstFlowReturn
dxgicap_acquire_next_frame (DxgiCapture * self, gboolean show_cursor,
guint timeout)
{
gboolean ret = FALSE;
GstFlowReturn ret = GST_FLOW_ERROR;
HRESULT hr;
GstDXGIScreenCapSrc *src = self->src;
@ -465,10 +484,8 @@ dxgicap_acquire_next_frame (DxgiCapture * self, gboolean show_cursor,
if (!self->dxgi_dupl) {
/* Desktop duplication interface became invalid due to desktop switch,
* UAC prompt popping up, or similar event. Try to reinitialize. */
if (!initialize_output_duplication (self)) {
ret = TRUE;
goto end;
}
ret = initialize_output_duplication (self);
goto end;
}
/* Get the latest desktop frames. */
@ -478,13 +495,13 @@ dxgicap_acquire_next_frame (DxgiCapture * self, gboolean show_cursor,
/* In case of DXGI_ERROR_WAIT_TIMEOUT,
* it has not changed from the last time. */
GST_LOG_OBJECT (src, "DXGI_ERROR_WAIT_TIMEOUT");
ret = TRUE;
ret = GST_FLOW_OK;
goto end;
} else if (hr == DXGI_ERROR_ACCESS_LOST) {
GST_LOG_OBJECT (src, "DXGI_ERROR_ACCESS_LOST; reinitializing output "
"duplication...");
PTR_RELEASE (self->dxgi_dupl);
ret = TRUE;
ret = GST_FLOW_OK;
goto end;
}
HR_FAILED_GOTO (hr, IDXGIOutputDuplication::AcquireNextFrame, end);
@ -524,12 +541,12 @@ dxgicap_acquire_next_frame (DxgiCapture * self, gboolean show_cursor,
}
HR_FAILED_GOTO (hr, IDXGIOutputDuplication::GetFramePointerShape, end);
self->pointer_shape_info = pointer_shape_info;
ret = TRUE;
ret = GST_FLOW_OK;
} else {
ret = TRUE;
ret = GST_FLOW_OK;
}
} else {
ret = TRUE;
ret = GST_FLOW_OK;
}
end:
if (self->dxgi_dupl) {

3
sys/winscreencap/dxgicapture.h
View file

@ -56,6 +56,7 @@
} \
} G_STMT_END
#define GST_DXGICAP_FLOW_RESOLUTION_CHANGE GST_FLOW_CUSTOM_SUCCESS_1
typedef struct _GstDXGIScreenCapSrc GstDXGIScreenCapSrc;
@ -69,7 +70,7 @@ void dxgicap_destory (DxgiCapture * _this);
gboolean dxgicap_start (DxgiCapture * _this);
void dxgicap_stop (DxgiCapture * _this);
gint dxgicap_acquire_next_frame (DxgiCapture * _this, gboolean show_cursor,
GstFlowReturn dxgicap_acquire_next_frame (DxgiCapture * _this, gboolean show_cursor,
guint timeout);
gboolean dxgicap_copy_buffer (DxgiCapture * _this, gboolean show_cursor,
LPRECT src_rect, GstVideoInfo * video_info, GstBuffer * buf);

55
sys/winscreencap/gstdxgiscreencapsrc.c
View file

@ -126,9 +126,8 @@ static gboolean gst_dxgi_screen_cap_src_stop (GstBaseSrc * bsrc);
static gboolean gst_dxgi_screen_cap_src_unlock (GstBaseSrc * bsrc);
static GstFlowReturn gst_dxgi_screen_cap_src_fill (GstPushSrc * pushsrc,
GstBuffer * buffer);
static GstFlowReturn gst_dxgi_screen_cap_src_create (GstBaseSrc * pushsrc,
guint64 offset, guint length, GstBuffer ** buffer);
static HMONITOR _get_hmonitor (GstDXGIScreenCapSrc * src);
@ -139,12 +138,10 @@ gst_dxgi_screen_cap_src_class_init (GstDXGIScreenCapSrcClass * klass)
GObjectClass *go_class;
GstElementClass *e_class;
GstBaseSrcClass *bs_class;
GstPushSrcClass *ps_class;
go_class = G_OBJECT_CLASS (klass);
e_class = GST_ELEMENT_CLASS (klass);
bs_class = GST_BASE_SRC_CLASS (klass);
ps_class = GST_PUSH_SRC_CLASS (klass);
go_class->set_property = gst_dxgi_screen_cap_src_set_property;
go_class->get_property = gst_dxgi_screen_cap_src_get_property;
@ -156,7 +153,7 @@ gst_dxgi_screen_cap_src_class_init (GstDXGIScreenCapSrcClass * klass)
bs_class->stop = GST_DEBUG_FUNCPTR (gst_dxgi_screen_cap_src_stop);
bs_class->unlock = GST_DEBUG_FUNCPTR (gst_dxgi_screen_cap_src_unlock);
bs_class->fixate = GST_DEBUG_FUNCPTR (gst_dxgi_screen_cap_src_fixate);
ps_class->fill = GST_DEBUG_FUNCPTR (gst_dxgi_screen_cap_src_fill);
bs_class->create = GST_DEBUG_FUNCPTR (gst_dxgi_screen_cap_src_create);
g_object_class_install_property (go_class, PROP_MONITOR,
g_param_spec_int ("monitor", "Monitor",
@ -442,12 +439,15 @@ gst_dxgi_screen_cap_src_unlock (GstBaseSrc * bsrc)
}
static GstFlowReturn
gst_dxgi_screen_cap_src_fill (GstPushSrc * push_src, GstBuffer * buf)
gst_dxgi_screen_cap_src_create (GstBaseSrc * base_src, guint64 offset,
guint length, GstBuffer ** buf)
{
GstDXGIScreenCapSrc *src = GST_DXGI_SCREEN_CAP_SRC (push_src);
GstDXGIScreenCapSrc *src = GST_DXGI_SCREEN_CAP_SRC (base_src);
GstClock *clock;
GstClockTime buf_time, buf_dur;
guint64 frame_number;
GstFlowReturn ret;
GstBuffer *buffer = NULL;
if (G_UNLIKELY (!src->dxgi_capture)) {
GST_DEBUG_OBJECT (src, "format wasn't negotiated before create function");
@ -534,15 +534,40 @@ gst_dxgi_screen_cap_src_fill (GstPushSrc * push_src, GstBuffer * buf)
}
/* Get the latest desktop frame. */
if (dxgicap_acquire_next_frame (src->dxgi_capture, src->show_cursor, 0)) {
/* Copy the latest desktop frame to the video frame. */
if (dxgicap_copy_buffer (src->dxgi_capture, src->show_cursor,
&src->src_rect, &src->video_info, buf)) {
GST_BUFFER_TIMESTAMP (buf) = buf_time;
GST_BUFFER_DURATION (buf) = buf_dur;
return GST_FLOW_OK;
do {
ret = dxgicap_acquire_next_frame (src->dxgi_capture, src->show_cursor, 0);
if (ret == GST_DXGICAP_FLOW_RESOLUTION_CHANGE) {
GST_DEBUG_OBJECT (src, "Resolution change detected.");
if (!gst_base_src_negotiate (GST_BASE_SRC (src))) {
return GST_FLOW_NOT_NEGOTIATED;
}
}
} while (ret == GST_DXGICAP_FLOW_RESOLUTION_CHANGE);
if (ret != GST_FLOW_OK) {
return ret;
}
ret =
GST_BASE_SRC_CLASS (g_type_class_peek_parent (parent_class))->alloc
(base_src, offset, length, &buffer);
if (ret != GST_FLOW_OK) {
return ret;
}
/* Copy the latest desktop frame to the video frame. */
if (dxgicap_copy_buffer (src->dxgi_capture, src->show_cursor,
&src->src_rect, &src->video_info, buffer)) {
GST_BUFFER_TIMESTAMP (buffer) = buf_time;
GST_BUFFER_DURATION (buffer) = buf_dur;
*buf = buffer;
return GST_FLOW_OK;
}
gst_clear_buffer (&buffer);
return GST_FLOW_ERROR;
}