gstreamer/sys/d3d11/gstd3d11download.cpp
Seungha Yang 5b3e316039 d3d11: Port to C++
Direct3D11 objects are COM, and most COM C APIs are verbose
(C++ is a little better). So, by using C++ APIs, we can make code
shorter and more readable.
Moreover, "ComPtr" helper class (which is C++ only) can be
utilized, that is very helpful for avoiding error-prone COM refcounting
issue/leak.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2077>
2021-03-14 13:05:22 +09:00

461 lines
14 KiB
C++

/* GStreamer
* Copyright (C) <2019> Seungha Yang <seungha.yang@navercorp.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.
*/
/**
* SECTION:element-d3d11download
* @title: d3d11download
* @short_description: Downloads Direct3D11 texture memory into system memory
*
* Downloads Direct3D11 texture memory into system memory
*
* ## Example launch line
* ```
* gst-launch-1.0 filesrc location=test_h264.mp4 ! parsebin ! d3d11h264dec ! \
* d3d11convert ! d3d11download ! video/x-raw,width=640,height=480 ! mfh264enc ! \
* h264parse ! mp4mux ! filesink location=output.mp4
* ```
* This pipeline will resize decoded (by #d3d11h264dec) frames to 640x480
* resolution by using #d3d11convert. Then it will be copied into system memory
* by d3d11download. Finally downloaded frames will be encoded as a new
* H.264 stream via #mfh264enc and muxed via mp4mux
*
* Since: 1.18
*
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "gstd3d11download.h"
GST_DEBUG_CATEGORY_STATIC (gst_d3d11_download_debug);
#define GST_CAT_DEFAULT gst_d3d11_download_debug
static GstStaticCaps sink_template_caps =
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_D3D11_MEMORY, GST_D3D11_ALL_FORMATS) "; "
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_D3D11_MEMORY ","
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION,
GST_D3D11_ALL_FORMATS) "; "
GST_VIDEO_CAPS_MAKE (GST_D3D11_ALL_FORMATS) "; "
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY ","
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION,
GST_D3D11_ALL_FORMATS));
static GstStaticCaps src_template_caps =
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_D3D11_MEMORY, GST_D3D11_ALL_FORMATS) "; "
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_D3D11_MEMORY ","
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION,
GST_D3D11_ALL_FORMATS) "; "
GST_VIDEO_CAPS_MAKE (GST_D3D11_ALL_FORMATS) "; "
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY ","
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION,
GST_D3D11_ALL_FORMATS));
struct _GstD3D11Download
{
GstD3D11BaseFilter parent;
GstBuffer *staging_buffer;
};
#define gst_d3d11_download_parent_class parent_class
G_DEFINE_TYPE (GstD3D11Download, gst_d3d11_download,
GST_TYPE_D3D11_BASE_FILTER);
static void gst_d3d11_download_dispose (GObject * object);
static gboolean gst_d3d11_download_stop (GstBaseTransform * trans);
static gboolean gst_d3d11_download_sink_event (GstBaseTransform * trans,
GstEvent * event);
static GstCaps *gst_d3d11_download_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * filter);
static gboolean gst_d3d11_download_propose_allocation (GstBaseTransform * trans,
GstQuery * decide_query, GstQuery * query);
static gboolean gst_d3d11_download_decide_allocation (GstBaseTransform * trans,
GstQuery * query);
static GstFlowReturn gst_d3d11_download_transform (GstBaseTransform * trans,
GstBuffer * inbuf, GstBuffer * outbuf);
static gboolean gst_d3d11_download_set_info (GstD3D11BaseFilter * filter,
GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps,
GstVideoInfo * out_info);
static void
gst_d3d11_download_class_init (GstD3D11DownloadClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstBaseTransformClass *trans_class = GST_BASE_TRANSFORM_CLASS (klass);
GstD3D11BaseFilterClass *bfilter_class = GST_D3D11_BASE_FILTER_CLASS (klass);
GstCaps *caps;
gobject_class->dispose = gst_d3d11_download_dispose;
caps = gst_d3d11_get_updated_template_caps (&sink_template_caps);
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, caps));
gst_caps_unref (caps);
caps = gst_d3d11_get_updated_template_caps (&src_template_caps);
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, caps));
gst_caps_unref (caps);
gst_element_class_set_static_metadata (element_class,
"Direct3D11 downloader", "Filter/Video",
"Downloads Direct3D11 texture memory into system memory",
"Seungha Yang <seungha.yang@navercorp.com>");
trans_class->passthrough_on_same_caps = TRUE;
trans_class->stop = GST_DEBUG_FUNCPTR (gst_d3d11_download_stop);
trans_class->sink_event = GST_DEBUG_FUNCPTR (gst_d3d11_download_sink_event);
trans_class->transform_caps =
GST_DEBUG_FUNCPTR (gst_d3d11_download_transform_caps);
trans_class->propose_allocation =
GST_DEBUG_FUNCPTR (gst_d3d11_download_propose_allocation);
trans_class->decide_allocation =
GST_DEBUG_FUNCPTR (gst_d3d11_download_decide_allocation);
trans_class->transform = GST_DEBUG_FUNCPTR (gst_d3d11_download_transform);
bfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_d3d11_download_set_info);
GST_DEBUG_CATEGORY_INIT (gst_d3d11_download_debug,
"d3d11download", 0, "d3d11download Element");
}
static void
gst_d3d11_download_init (GstD3D11Download * download)
{
}
static void
gst_d3d11_download_dispose (GObject * object)
{
GstD3D11Download *self = GST_D3D11_DOWNLOAD (object);
gst_clear_buffer (&self->staging_buffer);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static gboolean
gst_d3d11_download_stop (GstBaseTransform * trans)
{
GstD3D11Download *self = GST_D3D11_DOWNLOAD (trans);
gst_clear_buffer (&self->staging_buffer);
return GST_BASE_TRANSFORM_CLASS (parent_class)->stop (trans);
}
static gboolean
gst_d3d11_download_sink_event (GstBaseTransform * trans, GstEvent * event)
{
GstD3D11Download *self = GST_D3D11_DOWNLOAD (trans);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
/* We don't need to hold this staging buffer after eos */
gst_clear_buffer (&self->staging_buffer);
break;
default:
break;
}
return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
}
static GstCaps *
_set_caps_features (const GstCaps * caps, const gchar * feature_name)
{
GstCaps *tmp = gst_caps_copy (caps);
guint n = gst_caps_get_size (tmp);
guint i = 0;
for (i = 0; i < n; i++)
gst_caps_set_features (tmp, i,
gst_caps_features_from_string (feature_name));
return tmp;
}
static GstCaps *
gst_d3d11_download_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * filter)
{
GstCaps *result, *tmp;
GST_DEBUG_OBJECT (trans,
"Transforming caps %" GST_PTR_FORMAT " in direction %s", caps,
(direction == GST_PAD_SINK) ? "sink" : "src");
if (direction == GST_PAD_SINK) {
tmp = _set_caps_features (caps, GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY);
tmp = gst_caps_merge (gst_caps_ref (caps), tmp);
} else {
GstCaps *newcaps;
tmp = gst_caps_ref (caps);
newcaps = _set_caps_features (caps, GST_CAPS_FEATURE_MEMORY_D3D11_MEMORY);
tmp = gst_caps_merge (tmp, newcaps);
}
if (filter) {
result = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (tmp);
} else {
result = tmp;
}
GST_DEBUG_OBJECT (trans, "returning caps: %" GST_PTR_FORMAT, result);
return result;
}
static gboolean
gst_d3d11_download_propose_allocation (GstBaseTransform * trans,
GstQuery * decide_query, GstQuery * query)
{
GstD3D11BaseFilter *filter = GST_D3D11_BASE_FILTER (trans);
GstVideoInfo info;
GstBufferPool *pool;
GstCaps *caps;
guint size;
if (!GST_BASE_TRANSFORM_CLASS (parent_class)->propose_allocation (trans,
decide_query, query))
return FALSE;
/* passthrough, we're done */
if (decide_query == NULL)
return TRUE;
gst_query_parse_allocation (query, &caps, NULL);
if (caps == NULL)
return FALSE;
if (!gst_video_info_from_caps (&info, caps))
return FALSE;
if (gst_query_get_n_allocation_pools (query) == 0) {
GstCapsFeatures *features;
GstStructure *config;
gboolean is_d3d11 = FALSE;
features = gst_caps_get_features (caps, 0);
if (features && gst_caps_features_contains (features,
GST_CAPS_FEATURE_MEMORY_D3D11_MEMORY)) {
GST_DEBUG_OBJECT (filter, "upstream support d3d11 memory");
pool = gst_d3d11_buffer_pool_new (filter->device);
is_d3d11 = TRUE;
} else {
pool = gst_video_buffer_pool_new ();
}
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
/* d3d11 pool does not support video alignment */
if (!is_d3d11) {
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT);
}
size = GST_VIDEO_INFO_SIZE (&info);
gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
if (!gst_buffer_pool_set_config (pool, config))
goto config_failed;
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
/* d3d11 buffer pool might update buffer size by self */
if (is_d3d11) {
size = GST_D3D11_BUFFER_POOL (pool)->buffer_size;
}
gst_query_add_allocation_pool (query, pool, size, 0, 0);
gst_object_unref (pool);
}
return TRUE;
/* ERRORS */
config_failed:
{
GST_ERROR_OBJECT (filter, "failed to set config");
gst_object_unref (pool);
return FALSE;
}
}
static gboolean
gst_d3d11_download_decide_allocation (GstBaseTransform * trans,
GstQuery * query)
{
GstBufferPool *pool = NULL;
GstStructure *config;
guint min, max, size;
gboolean update_pool;
GstCaps *outcaps = NULL;
if (gst_query_get_n_allocation_pools (query) > 0) {
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
if (!pool)
gst_query_parse_allocation (query, &outcaps, NULL);
update_pool = TRUE;
} else {
GstVideoInfo vinfo;
gst_query_parse_allocation (query, &outcaps, NULL);
gst_video_info_from_caps (&vinfo, outcaps);
size = vinfo.size;
min = max = 0;
update_pool = FALSE;
}
if (!pool)
pool = gst_video_buffer_pool_new ();
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
if (outcaps)
gst_buffer_pool_config_set_params (config, outcaps, size, 0, 0);
gst_buffer_pool_set_config (pool, config);
if (update_pool)
gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
else
gst_query_add_allocation_pool (query, pool, size, min, max);
gst_object_unref (pool);
return GST_BASE_TRANSFORM_CLASS (parent_class)->decide_allocation (trans,
query);
}
static gboolean
gst_d3d11_download_can_use_staging_buffer (GstD3D11Download * self,
GstBuffer * inbuf)
{
GstD3D11BaseFilter *filter = GST_D3D11_BASE_FILTER (self);
ID3D11Device *device_handle =
gst_d3d11_device_get_device_handle (filter->device);
if (!gst_d3d11_buffer_can_access_device (inbuf, device_handle))
return FALSE;
if (self->staging_buffer)
return TRUE;
self->staging_buffer = gst_d3d11_allocate_staging_buffer_for (inbuf,
&filter->in_info, TRUE);
if (!self->staging_buffer) {
GST_WARNING_OBJECT (self, "Couldn't allocate staging buffer");
return FALSE;
}
return TRUE;
}
static GstFlowReturn
gst_d3d11_download_transform (GstBaseTransform * trans, GstBuffer * inbuf,
GstBuffer * outbuf)
{
GstD3D11BaseFilter *filter = GST_D3D11_BASE_FILTER (trans);
GstD3D11Download *self = GST_D3D11_DOWNLOAD (trans);
GstVideoFrame in_frame, out_frame;
GstFlowReturn ret = GST_FLOW_OK;
gboolean use_staging_buf;
GstBuffer *target_inbuf = inbuf;
guint i;
use_staging_buf = gst_d3d11_download_can_use_staging_buffer (self, inbuf);
if (use_staging_buf) {
GST_TRACE_OBJECT (self, "Copy input buffer to staging buffer");
/* Copy d3d11 texture to staging texture */
if (!gst_d3d11_buffer_copy_into (self->staging_buffer,
inbuf, &filter->in_info)) {
GST_ERROR_OBJECT (self,
"Failed to copy input buffer into staging texture");
return GST_FLOW_ERROR;
}
target_inbuf = self->staging_buffer;
}
if (!gst_video_frame_map (&in_frame, &filter->in_info, target_inbuf,
(GstMapFlags) (GST_MAP_READ | GST_VIDEO_FRAME_MAP_FLAG_NO_REF)))
goto invalid_buffer;
if (!gst_video_frame_map (&out_frame, &filter->out_info, outbuf,
(GstMapFlags) (GST_MAP_WRITE | GST_VIDEO_FRAME_MAP_FLAG_NO_REF))) {
gst_video_frame_unmap (&in_frame);
goto invalid_buffer;
}
for (i = 0; i < GST_VIDEO_FRAME_N_PLANES (&in_frame); i++) {
if (!gst_video_frame_copy_plane (&out_frame, &in_frame, i)) {
GST_ERROR_OBJECT (filter, "Couldn't copy %dth plane", i);
ret = GST_FLOW_ERROR;
break;
}
}
gst_video_frame_unmap (&out_frame);
gst_video_frame_unmap (&in_frame);
return ret;
/* ERRORS */
invalid_buffer:
{
GST_ELEMENT_WARNING (filter, CORE, NOT_IMPLEMENTED, (NULL),
("invalid video buffer received"));
return GST_FLOW_ERROR;
}
}
static gboolean
gst_d3d11_download_set_info (GstD3D11BaseFilter * filter,
GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps,
GstVideoInfo * out_info)
{
GstD3D11Download *self = GST_D3D11_DOWNLOAD (filter);
gst_clear_buffer (&self->staging_buffer);
return TRUE;
}