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glupload: Add dmabuf upload method.
This upload method detect and optimize uploads of DMABuf memory. This is
done by creating and caching EGLImages wrapper around DMABuf. The
EGLImages are then binded to a texture which get converter using
standard shader.
Example pipeline:
GST_GL_PLATFORM=egl \
gst-launch-1.0 v4l2src device=/dev/video1 io-mode=4 ! \
video/x-raw,format=NV12 ! glimagesink
https://bugzilla.gnome.org/show_bug.cgi?id=743345
This commit is contained in:
Nicolas Dufresne
Tim-Philipp Müller
parent
f91b4eb4ff
commit
8492c045a4
1 changed files with 266 additions and 1 deletions
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@ -31,6 +31,10 @@
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#include "egl/gsteglimagememory.h"
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#endif
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#if GST_GL_HAVE_DMABUF
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#include <gst/allocators/gstdmabuf.h>
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#endif
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/**
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* SECTION:gstglupload
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* @short_description: an object that uploads to GL textures
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@ -544,7 +548,265 @@ static const UploadMethod _egl_image_upload = {
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&_egl_image_upload_perform,
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&_egl_image_upload_free
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};
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#endif
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#endif /* GST_GL_HAVE_PLATFORM_EGL */
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#if GST_GL_HAVE_DMABUF
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struct DmabufUpload
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{
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GstGLUpload *upload;
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GstMemory *eglimage[GST_VIDEO_MAX_PLANES];
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GstBuffer *outbuf;
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GstGLVideoAllocationParams *params;
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};
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static GstStaticCaps _dma_buf_upload_caps =
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (GST_GL_MEMORY_VIDEO_FORMATS_STR));
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static gpointer
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_dma_buf_upload_new (GstGLUpload * upload)
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{
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struct DmabufUpload *dmabuf = g_new0 (struct DmabufUpload, 1);
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dmabuf->upload = upload;
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return dmabuf;
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}
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static GstCaps *
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_dma_buf_upload_transform_caps (GstGLContext * context,
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GstPadDirection direction, GstCaps * caps)
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{
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GstCaps *ret;
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if (direction == GST_PAD_SINK) {
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ret = _set_caps_features (caps, GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
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} else {
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gint i, n;
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ret = _set_caps_features (caps, GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY);
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n = gst_caps_get_size (ret);
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for (i = 0; i < n; i++) {
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GstStructure *s = gst_caps_get_structure (ret, i);
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gst_structure_remove_fields (s, "texture-target", NULL);
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}
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}
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return ret;
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}
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static GQuark
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_eglimage_quark (gint plane)
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{
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static GQuark quark[4] = { 0 };
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static const gchar *quark_str[] = {
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"GstGLDMABufEGLImage0",
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"GstGLDMABufEGLImage1",
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"GstGLDMABufEGLImage2",
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"GstGLDMABufEGLImage3",
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};
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if (!quark[plane])
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quark[plane] = g_quark_from_static_string (quark_str[plane]);
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return quark[plane];
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}
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static GstMemory *
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_get_cached_eglimage (GstMemory * mem, gint plane)
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{
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return gst_mini_object_get_qdata (GST_MINI_OBJECT (mem),
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_eglimage_quark (plane));
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}
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static void
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_set_cached_eglimage (GstMemory * mem, GstMemory * eglimage, gint plane)
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{
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return gst_mini_object_set_qdata (GST_MINI_OBJECT (mem),
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_eglimage_quark (plane), eglimage, (GDestroyNotify) gst_memory_unref);
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}
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static gboolean
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_dma_buf_upload_accept (gpointer impl, GstBuffer * buffer, GstCaps * in_caps,
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GstCaps * out_caps)
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{
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struct DmabufUpload *dmabuf = impl;
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GstVideoInfo *in_info = &dmabuf->upload->priv->in_info;
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guint n_planes = GST_VIDEO_INFO_N_PLANES (in_info);
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GstVideoMeta *meta;
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guint n_mem;
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guint mems_idx[GST_VIDEO_MAX_PLANES];
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gsize mems_skip[GST_VIDEO_MAX_PLANES];
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GstMemory *mems[GST_VIDEO_MAX_PLANES];
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guint i;
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n_mem = gst_buffer_n_memory (buffer);
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meta = gst_buffer_get_video_meta (buffer);
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/* dmabuf upload is only supported with EGL contexts. */
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if (!GST_IS_GL_CONTEXT_EGL (dmabuf->upload->context))
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return FALSE;
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if (!gst_gl_context_check_feature (dmabuf->upload->context,
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"EGL_KHR_image_base"))
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return FALSE;
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/* This will eliminate most non-dmabuf out there */
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if (!gst_is_dmabuf_memory (gst_buffer_peek_memory (buffer, 0)))
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return FALSE;
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/* We cannot have multiple dmabuf per plane */
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if (n_mem > n_planes)
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return FALSE;
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/* Update video info based on video meta */
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if (meta) {
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in_info->width = meta->width;
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in_info->height = meta->height;
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for (i = 0; i < meta->n_planes; i++) {
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in_info->offset[i] = meta->offset[i];
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in_info->stride[i] = meta->stride[i];
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}
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}
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if (dmabuf->params)
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gst_gl_allocation_params_free ((GstGLAllocationParams *) dmabuf->params);
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if (!(dmabuf->params =
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gst_gl_video_allocation_params_new (dmabuf->upload->context, NULL,
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&dmabuf->upload->priv->in_info, -1, NULL,
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GST_GL_TEXTURE_TARGET_2D)))
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return FALSE;
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/* Find and validate all memories */
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for (i = 0; i < n_planes; i++) {
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guint plane_size;
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guint length;
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plane_size = gst_gl_get_plane_data_size (in_info, NULL, i);
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if (!gst_buffer_find_memory (buffer, in_info->offset[i], plane_size,
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&mems_idx[i], &length, &mems_skip[i]))
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return FALSE;
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/* We can't have more then one dmabuf per plane */
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if (length != 1)
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return FALSE;
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mems[i] = gst_buffer_peek_memory (buffer, mems_idx[i]);
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/* And all memory found must be dmabuf */
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if (!gst_is_dmabuf_memory (mems[i]))
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return FALSE;
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}
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/* Now create an EGLImage for each dmabufs */
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for (i = 0; i < n_planes; i++) {
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/* check if one is cached */
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dmabuf->eglimage[i] = _get_cached_eglimage (mems[i], i);
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if (dmabuf->eglimage[i])
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continue;
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/* otherwise create one and cache it */
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dmabuf->eglimage[i] =
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gst_egl_image_memory_from_dmabuf (dmabuf->upload->context,
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gst_dmabuf_memory_get_fd (mems[i]), in_info, i, mems_skip[i]);
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if (!dmabuf->eglimage[i])
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return FALSE;
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_set_cached_eglimage (mems[i], dmabuf->eglimage[i], i);
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}
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return TRUE;
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}
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static void
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_dma_buf_upload_propose_allocation (gpointer impl, GstQuery * decide_query,
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GstQuery * query)
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{
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/* nothing to do for now. */
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}
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static void
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_dma_buf_upload_perform_gl_thread (GstGLContext * context,
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struct DmabufUpload *dmabuf)
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{
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GstGLMemoryAllocator *allocator;
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guint i, n;
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allocator =
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GST_GL_MEMORY_ALLOCATOR (gst_allocator_find
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(GST_GL_MEMORY_PBO_ALLOCATOR_NAME));
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/* FIXME: buffer pool */
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dmabuf->outbuf = gst_buffer_new ();
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gst_gl_memory_setup_buffer (allocator, dmabuf->outbuf, dmabuf->params);
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gst_object_unref (allocator);
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n = gst_buffer_n_memory (dmabuf->outbuf);
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for (i = 0; i < n; i++) {
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const GstGLFuncs *gl = NULL;
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GstGLMemory *gl_mem =
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(GstGLMemory *) gst_buffer_peek_memory (dmabuf->outbuf, i);
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if (!dmabuf->eglimage[i]) {
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g_clear_pointer (&dmabuf->outbuf, gst_buffer_unref);
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return;
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}
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gl = GST_GL_CONTEXT (((GstEGLImageMemory *) gl_mem)->context)->gl_vtable;
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gl->ActiveTexture (GL_TEXTURE0 + i);
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gl->BindTexture (GL_TEXTURE_2D, gl_mem->tex_id);
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gl->EGLImageTargetTexture2D (GL_TEXTURE_2D,
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gst_egl_image_memory_get_image (dmabuf->eglimage[i]));
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}
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}
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static GstGLUploadReturn
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_dma_buf_upload_perform (gpointer impl, GstBuffer * buffer, GstBuffer ** outbuf)
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{
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struct DmabufUpload *dmabuf = impl;
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gst_gl_context_thread_add (dmabuf->upload->context,
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(GstGLContextThreadFunc) _dma_buf_upload_perform_gl_thread, dmabuf);
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if (!dmabuf->outbuf)
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return GST_GL_UPLOAD_ERROR;
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gst_buffer_add_parent_buffer_meta (dmabuf->outbuf, buffer);
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*outbuf = dmabuf->outbuf;
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dmabuf->outbuf = NULL;
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return GST_GL_UPLOAD_DONE;
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}
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static void
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_dma_buf_upload_free (gpointer impl)
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{
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struct DmabufUpload *dmabuf = impl;
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if (dmabuf->params)
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gst_gl_allocation_params_free ((GstGLAllocationParams *) dmabuf->params);
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g_free (impl);
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}
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static const UploadMethod _dma_buf_upload = {
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"Dmabuf",
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0,
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&_dma_buf_upload_caps,
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&_dma_buf_upload_new,
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&_dma_buf_upload_transform_caps,
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&_dma_buf_upload_accept,
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&_dma_buf_upload_propose_allocation,
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&_dma_buf_upload_perform,
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&_dma_buf_upload_free
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};
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#endif /* GST_GL_HAVE_DMABUF */
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struct GLUploadMeta
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{
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@ -977,6 +1239,9 @@ static const UploadMethod _raw_data_upload = {
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static const UploadMethod *upload_methods[] = { &_gl_memory_upload,
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#if GST_GL_HAVE_PLATFORM_EGL
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&_egl_image_upload,
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#endif
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#if GST_GL_HAVE_DMABUF
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&_dma_buf_upload,
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#endif
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&_upload_meta_upload, &_raw_data_upload
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};
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