mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-25 17:50:36 +00:00
gldownload: Add dmabuf exporting
This patch adds code to gldownload to export the image as a dmabuf if requested. The element now exposes memory:DMABuf as a cap feature, and if it is selected, the element exports the texture to an EGL image and then a dmabuf. It also implements a fallback to system memory download in case the exportation failed. https://bugzilla.gnome.org/show_bug.cgi?id=776927
This commit is contained in:
Matt Fischer
Tim-Philipp Müller
parent
b5dee0fe5b
commit
c98f92ee03
4 changed files with 333 additions and 5 deletions
|
|
@ -23,6 +23,11 @@
|
|||
#endif
|
||||
|
||||
#include <gst/gl/gl.h>
|
||||
#if GST_GL_HAVE_PLATFORM_EGL && GST_GL_HAVE_DMABUF
|
||||
#include <gst/gl/egl/gsteglimage.h>
|
||||
#include <gst/allocators/gstdmabuf.h>
|
||||
#endif
|
||||
|
||||
#include "gstgldownloadelement.h"
|
||||
|
||||
GST_DEBUG_CATEGORY_STATIC (gst_gl_download_element_debug);
|
||||
|
|
@ -45,12 +50,19 @@ gst_gl_download_element_prepare_output_buffer (GstBaseTransform * bt,
|
|||
GstBuffer * buffer, GstBuffer ** outbuf);
|
||||
static GstFlowReturn gst_gl_download_element_transform (GstBaseTransform * bt,
|
||||
GstBuffer * buffer, GstBuffer * outbuf);
|
||||
static gboolean gst_gl_download_element_decide_allocation (GstBaseTransform *
|
||||
trans, GstQuery * query);
|
||||
static void gst_gl_download_element_finalize (GObject * object);
|
||||
|
||||
static GstStaticPadTemplate gst_gl_download_element_src_pad_template =
|
||||
GST_STATIC_PAD_TEMPLATE ("src",
|
||||
GST_PAD_SRC,
|
||||
GST_PAD_ALWAYS,
|
||||
GST_STATIC_CAPS ("video/x-raw; video/x-raw(memory:GLMemory)"));
|
||||
GST_STATIC_CAPS (
|
||||
#if GST_GL_HAVE_PLATFORM_EGL && GST_GL_HAVE_DMABUF
|
||||
"video/x-raw(" GST_CAPS_FEATURE_MEMORY_DMABUF "); "
|
||||
#endif
|
||||
"video/x-raw; video/x-raw(memory:GLMemory)"));
|
||||
|
||||
static GstStaticPadTemplate gst_gl_download_element_sink_pad_template =
|
||||
GST_STATIC_PAD_TEMPLATE ("sink",
|
||||
|
|
@ -63,6 +75,7 @@ gst_gl_download_element_class_init (GstGLDownloadElementClass * klass)
|
|||
{
|
||||
GstBaseTransformClass *bt_class = GST_BASE_TRANSFORM_CLASS (klass);
|
||||
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
||||
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
||||
|
||||
bt_class->transform_caps = gst_gl_download_element_transform_caps;
|
||||
bt_class->set_caps = gst_gl_download_element_set_caps;
|
||||
|
|
@ -70,6 +83,7 @@ gst_gl_download_element_class_init (GstGLDownloadElementClass * klass)
|
|||
bt_class->prepare_output_buffer =
|
||||
gst_gl_download_element_prepare_output_buffer;
|
||||
bt_class->transform = gst_gl_download_element_transform;
|
||||
bt_class->decide_allocation = gst_gl_download_element_decide_allocation;
|
||||
|
||||
bt_class->passthrough_on_same_caps = TRUE;
|
||||
|
||||
|
|
@ -81,6 +95,8 @@ gst_gl_download_element_class_init (GstGLDownloadElementClass * klass)
|
|||
gst_element_class_set_metadata (element_class,
|
||||
"OpenGL downloader", "Filter/Video",
|
||||
"Downloads data from OpenGL", "Matthew Waters <matthew@centricular.com>");
|
||||
|
||||
object_class->finalize = gst_gl_download_element_finalize;
|
||||
}
|
||||
|
||||
static void
|
||||
|
|
@ -103,8 +119,26 @@ gst_gl_download_element_set_caps (GstBaseTransform * bt, GstCaps * in_caps,
|
|||
|
||||
features = gst_caps_get_features (out_caps, 0);
|
||||
|
||||
dl->do_pbo_transfers = (!features || gst_caps_features_contains (features,
|
||||
GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY));
|
||||
dl->do_pbo_transfers = FALSE;
|
||||
if (dl->dmabuf_allocator) {
|
||||
gst_object_unref (GST_OBJECT (dl->dmabuf_allocator));
|
||||
dl->dmabuf_allocator = NULL;
|
||||
}
|
||||
|
||||
if (!features) {
|
||||
dl->do_pbo_transfers = TRUE;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
if (gst_caps_features_contains (features, GST_CAPS_FEATURE_MEMORY_GL_MEMORY)) {
|
||||
/* do nothing with the buffer */
|
||||
} else if (gst_caps_features_contains (features,
|
||||
GST_CAPS_FEATURE_MEMORY_DMABUF)) {
|
||||
dl->dmabuf_allocator = gst_dmabuf_allocator_new ();
|
||||
} else if (gst_caps_features_contains (features,
|
||||
GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY)) {
|
||||
dl->do_pbo_transfers = TRUE;
|
||||
}
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
|
@ -133,8 +167,16 @@ gst_gl_download_element_transform_caps (GstBaseTransform * bt,
|
|||
tmp = _set_caps_features (caps, GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
|
||||
tmp = gst_caps_merge (gst_caps_ref (caps), tmp);
|
||||
} else {
|
||||
tmp = _set_caps_features (caps, GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY);
|
||||
tmp = gst_caps_merge (gst_caps_ref (caps), tmp);
|
||||
GstCaps *newcaps;
|
||||
tmp = gst_caps_ref (caps);
|
||||
|
||||
#if GST_GL_HAVE_PLATFORM_EGL && GST_GL_HAVE_DMABUF
|
||||
newcaps = _set_caps_features (caps, GST_CAPS_FEATURE_MEMORY_DMABUF);
|
||||
tmp = gst_caps_merge (tmp, newcaps);
|
||||
#endif
|
||||
|
||||
newcaps = _set_caps_features (caps, GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY);
|
||||
tmp = gst_caps_merge (tmp, newcaps);
|
||||
}
|
||||
|
||||
if (filter) {
|
||||
|
|
@ -163,6 +205,168 @@ gst_gl_download_element_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
|
|||
return TRUE;
|
||||
}
|
||||
|
||||
#if GST_GL_HAVE_PLATFORM_EGL && GST_GL_HAVE_DMABUF
|
||||
|
||||
struct DmabufInfo
|
||||
{
|
||||
GstMemory *dmabuf;
|
||||
gint stride;
|
||||
gsize offset;
|
||||
};
|
||||
|
||||
static void
|
||||
_free_dmabuf_info (struct DmabufInfo *info)
|
||||
{
|
||||
gst_memory_unref (info->dmabuf);
|
||||
g_free (info);
|
||||
}
|
||||
|
||||
static GQuark
|
||||
_dmabuf_info_quark (void)
|
||||
{
|
||||
static GQuark quark = 0;
|
||||
|
||||
if (!quark)
|
||||
quark = g_quark_from_static_string ("GstGLDownloadDmabufInfo");
|
||||
return quark;
|
||||
}
|
||||
|
||||
static struct DmabufInfo *
|
||||
_get_cached_dmabuf_info (GstGLMemory * mem)
|
||||
{
|
||||
return gst_mini_object_get_qdata (GST_MINI_OBJECT (mem),
|
||||
_dmabuf_info_quark ());
|
||||
}
|
||||
|
||||
static void
|
||||
_set_cached_dmabuf_info (GstGLMemory * mem, struct DmabufInfo *info)
|
||||
{
|
||||
return gst_mini_object_set_qdata (GST_MINI_OBJECT (mem),
|
||||
_dmabuf_info_quark (), info, (GDestroyNotify) _free_dmabuf_info);
|
||||
}
|
||||
|
||||
struct DmabufTransfer
|
||||
{
|
||||
GstGLDownloadElement *download;
|
||||
GstGLMemory *glmem;
|
||||
struct DmabufInfo *info;
|
||||
};
|
||||
|
||||
static void
|
||||
_create_cached_dmabuf_info (GstGLContext * context, gpointer data)
|
||||
{
|
||||
struct DmabufTransfer *transfer = (struct DmabufTransfer *) data;
|
||||
GstEGLImage *image;
|
||||
|
||||
image = gst_egl_image_from_texture (context, transfer->glmem, NULL);
|
||||
if (image) {
|
||||
int fd;
|
||||
gint stride;
|
||||
gsize offset;
|
||||
|
||||
if (gst_egl_image_export_dmabuf (image, &fd, &stride, &offset)) {
|
||||
GstGLDownloadElement *download = transfer->download;
|
||||
struct DmabufInfo *info;
|
||||
gsize maxsize;
|
||||
|
||||
gst_memory_get_sizes (GST_MEMORY_CAST (transfer->glmem), NULL, &maxsize);
|
||||
|
||||
info = g_new0 (struct DmabufInfo, 1);
|
||||
info->dmabuf =
|
||||
gst_dmabuf_allocator_alloc (download->dmabuf_allocator, fd, maxsize);
|
||||
info->stride = stride;
|
||||
info->offset = offset;
|
||||
|
||||
transfer->info = info;
|
||||
}
|
||||
|
||||
gst_egl_image_unref (image);
|
||||
}
|
||||
}
|
||||
|
||||
static GstBuffer *
|
||||
_try_export_dmabuf (GstGLDownloadElement * download, GstBuffer * inbuf)
|
||||
{
|
||||
GstGLMemory *glmem;
|
||||
GstBuffer *buffer = NULL;
|
||||
int i;
|
||||
gsize offset[GST_VIDEO_MAX_PLANES];
|
||||
gint stride[GST_VIDEO_MAX_PLANES];
|
||||
GstCaps *src_caps;
|
||||
GstVideoInfo out_info;
|
||||
gsize total_offset;
|
||||
|
||||
glmem = GST_GL_MEMORY_CAST (gst_buffer_peek_memory (inbuf, 0));
|
||||
if (glmem) {
|
||||
GstGLContext *context = GST_GL_BASE_MEMORY_CAST (glmem)->context;
|
||||
if (gst_gl_context_get_gl_platform (context) != GST_GL_PLATFORM_EGL)
|
||||
return NULL;
|
||||
}
|
||||
|
||||
buffer = gst_buffer_new ();
|
||||
total_offset = 0;
|
||||
|
||||
for (i = 0; i < gst_buffer_n_memory (inbuf); i++) {
|
||||
struct DmabufInfo *info;
|
||||
|
||||
glmem = GST_GL_MEMORY_CAST (gst_buffer_peek_memory (inbuf, i));
|
||||
info = _get_cached_dmabuf_info (glmem);
|
||||
if (!info) {
|
||||
GstGLContext *context = GST_GL_BASE_MEMORY_CAST (glmem)->context;
|
||||
struct DmabufTransfer transfer;
|
||||
|
||||
transfer.download = download;
|
||||
transfer.glmem = glmem;
|
||||
transfer.info = NULL;
|
||||
gst_gl_context_thread_add (context, _create_cached_dmabuf_info,
|
||||
&transfer);
|
||||
info = transfer.info;
|
||||
|
||||
if (info)
|
||||
_set_cached_dmabuf_info (glmem, info);
|
||||
}
|
||||
|
||||
if (info) {
|
||||
offset[i] = total_offset + info->offset;
|
||||
stride[i] = info->stride;
|
||||
total_offset += gst_memory_get_sizes (info->dmabuf, NULL, NULL);
|
||||
gst_buffer_insert_memory (buffer, -1, gst_memory_ref (info->dmabuf));
|
||||
} else {
|
||||
gst_buffer_unref (buffer);
|
||||
buffer = NULL;
|
||||
goto export_complete;
|
||||
}
|
||||
}
|
||||
|
||||
src_caps = gst_pad_get_current_caps (GST_BASE_TRANSFORM (download)->srcpad);
|
||||
gst_video_info_from_caps (&out_info, src_caps);
|
||||
|
||||
if (download->add_videometa) {
|
||||
gst_buffer_add_video_meta_full (buffer, out_info.flags,
|
||||
out_info.finfo->format, out_info.width, out_info.height,
|
||||
out_info.finfo->n_planes, offset, stride);
|
||||
} else {
|
||||
int i;
|
||||
gboolean match = TRUE;
|
||||
for (i = 0; i < gst_buffer_n_memory (inbuf); i++) {
|
||||
if (offset[i] != out_info.offset[i] || stride[i] != out_info.stride[i]) {
|
||||
match = FALSE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (!match) {
|
||||
gst_buffer_unref (buffer);
|
||||
buffer = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
export_complete:
|
||||
|
||||
return buffer;
|
||||
}
|
||||
#endif /* GST_GL_HAVE_PLATFORM_EGL && GST_GL_HAVE_DMABUF */
|
||||
|
||||
static GstFlowReturn
|
||||
gst_gl_download_element_prepare_output_buffer (GstBaseTransform * bt,
|
||||
GstBuffer * inbuf, GstBuffer ** outbuf)
|
||||
|
|
@ -181,6 +385,38 @@ gst_gl_download_element_prepare_output_buffer (GstBaseTransform * bt,
|
|||
gst_gl_memory_pbo_download_transfer ((GstGLMemoryPBO *) mem);
|
||||
}
|
||||
}
|
||||
#if GST_GL_HAVE_PLATFORM_EGL && GST_GL_HAVE_DMABUF
|
||||
else if (dl->dmabuf_allocator) {
|
||||
GstBuffer *buffer = _try_export_dmabuf (dl, inbuf);
|
||||
if (buffer) {
|
||||
if (GST_BASE_TRANSFORM_GET_CLASS (bt)->copy_metadata)
|
||||
if (!GST_BASE_TRANSFORM_GET_CLASS (bt)->copy_metadata (bt, inbuf,
|
||||
buffer)) {
|
||||
GST_ELEMENT_WARNING (GST_ELEMENT (bt), STREAM, NOT_IMPLEMENTED,
|
||||
("could not copy metadata"), (NULL));
|
||||
}
|
||||
|
||||
*outbuf = buffer;
|
||||
} else {
|
||||
GstCaps *src_caps;
|
||||
GstCapsFeatures *features;
|
||||
|
||||
gst_object_unref (dl->dmabuf_allocator);
|
||||
dl->dmabuf_allocator = NULL;
|
||||
|
||||
src_caps = gst_pad_get_current_caps (bt->srcpad);
|
||||
src_caps = gst_caps_make_writable (src_caps);
|
||||
features = gst_caps_get_features (src_caps, 0);
|
||||
gst_caps_features_remove (features, GST_CAPS_FEATURE_MEMORY_DMABUF);
|
||||
|
||||
if (!gst_base_transform_update_src_caps (bt, src_caps)) {
|
||||
GST_ERROR_OBJECT (bt, "DMABuf exportation didn't work and system "
|
||||
"memory is not supported.");
|
||||
return GST_FLOW_NOT_NEGOTIATED;
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
return GST_FLOW_OK;
|
||||
}
|
||||
|
|
@ -191,3 +427,32 @@ gst_gl_download_element_transform (GstBaseTransform * bt,
|
|||
{
|
||||
return GST_FLOW_OK;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
gst_gl_download_element_decide_allocation (GstBaseTransform * trans,
|
||||
GstQuery * query)
|
||||
{
|
||||
GstGLDownloadElement *download = GST_GL_DOWNLOAD_ELEMENT_CAST (trans);
|
||||
|
||||
if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) {
|
||||
download->add_videometa = TRUE;
|
||||
} else {
|
||||
download->add_videometa = FALSE;
|
||||
}
|
||||
|
||||
return GST_BASE_TRANSFORM_CLASS (parent_class)->decide_allocation (trans,
|
||||
query);
|
||||
}
|
||||
|
||||
static void
|
||||
gst_gl_download_element_finalize (GObject * object)
|
||||
{
|
||||
GstGLDownloadElement *download = GST_GL_DOWNLOAD_ELEMENT_CAST (object);
|
||||
|
||||
if (download->dmabuf_allocator) {
|
||||
gst_object_unref (GST_OBJECT (download->dmabuf_allocator));
|
||||
download->dmabuf_allocator = NULL;
|
||||
}
|
||||
|
||||
G_OBJECT_CLASS (parent_class)->finalize (object);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -45,6 +45,8 @@ struct _GstGLDownloadElement
|
|||
GstGLBaseFilter parent;
|
||||
|
||||
gboolean do_pbo_transfers;
|
||||
GstAllocator * dmabuf_allocator;
|
||||
gboolean add_videometa;
|
||||
};
|
||||
|
||||
struct _GstGLDownloadElementClass
|
||||
|
|
|
|||
|
|
@ -469,4 +469,63 @@ gst_egl_image_from_dmabuf (GstGLContext * context,
|
|||
return gst_egl_image_new_wrapped (context, img, format, NULL,
|
||||
(GstEGLImageDestroyNotify) _destroy_egl_image);
|
||||
}
|
||||
|
||||
gboolean
|
||||
gst_egl_image_export_dmabuf (GstEGLImage * image, int *fd, gint * stride,
|
||||
gsize * offset)
|
||||
{
|
||||
EGLBoolean (*gst_eglExportDMABUFImageQueryMESA) (EGLDisplay dpy,
|
||||
EGLImageKHR image, int *fourcc, int *num_planes,
|
||||
EGLuint64KHR * modifiers);
|
||||
EGLBoolean (*gst_eglExportDMABUFImageMESA) (EGLDisplay dpy, EGLImageKHR image,
|
||||
int *fds, EGLint * strides, EGLint * offsets);
|
||||
GstGLDisplayEGL *display_egl;
|
||||
EGLDisplay egl_display = EGL_DEFAULT_DISPLAY;
|
||||
int num_planes = 0;
|
||||
int egl_fd = 0;
|
||||
EGLint egl_stride = 0;
|
||||
EGLint egl_offset = 0;
|
||||
|
||||
gst_eglExportDMABUFImageQueryMESA =
|
||||
gst_gl_context_get_proc_address (image->context,
|
||||
"eglExportDMABUFImageQueryMESA");
|
||||
gst_eglExportDMABUFImageMESA =
|
||||
gst_gl_context_get_proc_address (image->context,
|
||||
"eglExportDMABUFImageMESA");
|
||||
|
||||
if (!gst_eglExportDMABUFImageQueryMESA || !gst_eglExportDMABUFImageMESA)
|
||||
return FALSE;
|
||||
|
||||
display_egl =
|
||||
(GstGLDisplayEGL *) gst_gl_display_egl_from_gl_display (image->
|
||||
context->display);
|
||||
if (!display_egl) {
|
||||
GST_WARNING_OBJECT (image->context,
|
||||
"Failed to retrieve GstGLDisplayEGL from %" GST_PTR_FORMAT,
|
||||
image->context->display);
|
||||
return FALSE;
|
||||
}
|
||||
egl_display =
|
||||
(EGLDisplay) gst_gl_display_get_handle (GST_GL_DISPLAY (display_egl));
|
||||
gst_object_unref (display_egl);
|
||||
|
||||
if (!gst_eglExportDMABUFImageQueryMESA (egl_display, image->image,
|
||||
NULL, &num_planes, NULL))
|
||||
return FALSE;
|
||||
|
||||
/* Don't allow multi-plane dmabufs */
|
||||
if (num_planes > 1)
|
||||
return FALSE;
|
||||
|
||||
if (!gst_eglExportDMABUFImageMESA (egl_display, image->image, &egl_fd,
|
||||
&egl_stride, &egl_offset))
|
||||
return FALSE;
|
||||
|
||||
*fd = egl_fd;
|
||||
*stride = egl_stride;
|
||||
*offset = egl_offset;
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
#endif /* GST_GL_HAVE_DMABUF */
|
||||
|
|
|
|||
|
|
@ -88,6 +88,8 @@ GstEGLImage * gst_egl_image_from_dmabuf (GstGLContext *
|
|||
GstVideoInfo * in_info,
|
||||
gint plane,
|
||||
gsize offset);
|
||||
GST_EXPORT
|
||||
gboolean gst_egl_image_export_dmabuf (GstEGLImage *image, int *fd, gint *stride, gsize *offset);
|
||||
#endif
|
||||
|
||||
/**
|
||||
|
|
|
|||
Loading…
Reference in a new issue