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This allow the wayland buffer pool to use a GstDRMDumbAllocator if it has been configured to do so. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3801>
247 lines
7.2 KiB
C
247 lines
7.2 KiB
C
/* GStreamer Wayland Library
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*
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* Copyright (C) 2017 Collabora Ltd.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "gstwlvideobufferpool.h"
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#include <gst/allocators/allocators.h>
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#include <drm_fourcc.h>
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GST_DEBUG_CATEGORY (gst_wl_videobufferpool_debug);
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#define GST_CAT_DEFAULT gst_wl_videobufferpool_debug
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struct _GstWlVideoBufferPool
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{
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GstVideoBufferPool parent;
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GstAllocator *allocator;
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GstVideoInfo vinfo;
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};
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#define gst_wl_video_buffer_pool_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstWlVideoBufferPool, gst_wl_video_buffer_pool,
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GST_TYPE_VIDEO_BUFFER_POOL,
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GST_DEBUG_CATEGORY_INIT (gst_wl_videobufferpool_debug,
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"wl_videobufferpool", 0, "wl_dmabuf library"));
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static void
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gst_wl_update_video_info_from_pitch (GstVideoInfo * vinfo, gint n_planes,
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guint32 pitch)
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{
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gint i;
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gsize offs = 0;
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guint32 height = GST_VIDEO_INFO_HEIGHT (vinfo);
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if (!pitch)
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return;
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for (i = 0; i < n_planes; i++) {
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guint32 plane_pitch;
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/* Overwrite the video info's stride and offset using the pitch calculcated
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* by the kms driver. */
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plane_pitch = gst_video_format_info_extrapolate_stride (vinfo->finfo, i,
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pitch);
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GST_VIDEO_INFO_PLANE_STRIDE (vinfo, i) = plane_pitch;
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GST_VIDEO_INFO_PLANE_OFFSET (vinfo, i) = offs;
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/* Note that we cannot negotiate special padding betweem each planes,
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* hence using the display height here. */
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offs += plane_pitch
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* GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (vinfo->finfo, i, height);
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GST_DEBUG ("Updated plane %i with stride %i and "
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"offset %" G_GSIZE_FORMAT "(from pitch %u)", i,
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GST_VIDEO_INFO_PLANE_STRIDE (vinfo, i),
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GST_VIDEO_INFO_PLANE_OFFSET (vinfo, i), pitch);
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}
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/* Update with the size use for display, excluding any padding at the end */
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GST_VIDEO_INFO_SIZE (vinfo) = offs;
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}
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static gboolean
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gst_wl_video_buffer_pool_start (GstBufferPool * pool)
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{
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GstWlVideoBufferPool *self = GST_WL_VIDEO_BUFFER_POOL (pool);
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GstStructure *config = gst_buffer_pool_get_config (pool);
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GstCaps *caps;
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GstAllocator *allocator;
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gboolean ret = FALSE;
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GstVideoFormat format;
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if (!gst_buffer_pool_config_get_params (config, &caps, NULL, NULL, NULL))
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goto wrong_config;
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if (!gst_buffer_pool_config_get_allocator (config, &allocator, NULL))
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goto wrong_config;
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/* now parse the caps from the config */
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if (!gst_video_info_from_caps (&self->vinfo, caps))
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goto wrong_caps;
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format = GST_VIDEO_INFO_FORMAT (&self->vinfo);
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if (!gst_video_format_to_wl_dmabuf_format (format))
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goto unsupported_pixel_format;
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if (GST_IS_DRM_DUMB_ALLOCATOR (allocator)) {
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if (!gst_drm_dumb_allocator_has_prime_export (allocator))
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goto no_prime_export;
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self->allocator = gst_object_ref (allocator);
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}
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/* all good */
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ret = GST_BUFFER_POOL_CLASS (parent_class)->start (pool);
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done:
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gst_structure_free (config);
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return ret;
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wrong_config:
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{
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GST_WARNING_OBJECT (pool, "invalid config");
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goto done;
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}
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wrong_caps:
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{
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GST_WARNING_OBJECT (pool,
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"failed getting geometry from caps %" GST_PTR_FORMAT, caps);
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goto done;
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}
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unsupported_pixel_format:
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{
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GST_WARNING_OBJECT (pool, "no support for %s pixel format",
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gst_video_format_to_string (format));
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goto done;
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}
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no_prime_export:
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{
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GST_WARNING_OBJECT (self,
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"not using DRM Dumb allocator as it can't export DMABuf.");
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goto done;
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}
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}
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static gboolean
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gst_wl_video_buffer_pool_stop (GstBufferPool * pool)
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{
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GstWlVideoBufferPool *self = GST_WL_VIDEO_BUFFER_POOL (pool);
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gst_clear_object (&self->allocator);
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gst_video_info_init (&self->vinfo);
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return GST_BUFFER_POOL_CLASS (parent_class)->stop (pool);
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}
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static GstFlowReturn
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gst_wl_video_buffer_pool_alloc_buffer (GstBufferPool * pool,
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GstBuffer ** buffer, GstBufferPoolAcquireParams * params)
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{
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GstWlVideoBufferPool *self = GST_WL_VIDEO_BUFFER_POOL (pool);
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guint32 pitch;
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GstBuffer *buf;
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GstMemory *drm_mem, *dma_mem;
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gsize dumbbuf_size;
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GstVideoFormat format = GST_VIDEO_INFO_FORMAT (&self->vinfo);
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guint32 drm_fourcc = gst_video_format_to_wl_dmabuf_format (format);
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if (!self->allocator)
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return GST_BUFFER_POOL_CLASS (parent_class)->alloc_buffer (pool, buffer,
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params);
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drm_mem = gst_drm_dumb_allocator_alloc (self->allocator,
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drm_fourcc, GST_VIDEO_INFO_WIDTH (&self->vinfo),
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GST_VIDEO_INFO_HEIGHT (&self->vinfo), &pitch);
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if (!drm_mem)
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goto alloc_failed;
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dma_mem = gst_drm_dumb_memory_export_dmabuf (drm_mem);
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gst_memory_unref (drm_mem);
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drm_mem = NULL;
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gst_wl_update_video_info_from_pitch (&self->vinfo,
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GST_VIDEO_INFO_N_PLANES (&self->vinfo), pitch);
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gst_memory_get_sizes (dma_mem, NULL, &dumbbuf_size);
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if (dumbbuf_size < GST_VIDEO_INFO_SIZE (&self->vinfo)) {
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GST_ERROR_OBJECT (self,
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"DUMB buffer has a size of %" G_GSIZE_FORMAT
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" but we require at least %" G_GSIZE_FORMAT " to hold a frame",
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dumbbuf_size, GST_VIDEO_INFO_SIZE (&self->vinfo));
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goto buffer_too_small;
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}
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gst_memory_resize (dma_mem, 0, GST_VIDEO_INFO_SIZE (&self->vinfo));
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buf = gst_buffer_new ();
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gst_buffer_append_memory (buf, dma_mem);
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gst_buffer_add_video_meta_full (buf, GST_VIDEO_FRAME_FLAG_NONE,
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GST_VIDEO_INFO_FORMAT (&self->vinfo), GST_VIDEO_INFO_WIDTH (&self->vinfo),
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GST_VIDEO_INFO_HEIGHT (&self->vinfo),
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GST_VIDEO_INFO_N_PLANES (&self->vinfo),
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self->vinfo.offset, self->vinfo.stride);
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*buffer = buf;
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return GST_FLOW_OK;
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/* ERRORS */
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alloc_failed:
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{
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GST_ERROR_OBJECT (self, "failed to allocate DRM Dumb buffer.");
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return GST_FLOW_ERROR;
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}
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buffer_too_small:
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{
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GST_ERROR_OBJECT (self, "dumb buffer too small to store an image.");
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return GST_FLOW_ERROR;
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}
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}
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static const gchar **
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gst_wl_video_buffer_pool_get_options (GstBufferPool * pool)
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{
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static const gchar *options[] = { GST_BUFFER_POOL_OPTION_VIDEO_META, NULL };
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return options;
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}
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static void
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gst_wl_video_buffer_pool_class_init (GstWlVideoBufferPoolClass * klass)
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{
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GstBufferPoolClass *pool_class = GST_BUFFER_POOL_CLASS (klass);
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pool_class->get_options = gst_wl_video_buffer_pool_get_options;
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pool_class->start = gst_wl_video_buffer_pool_start;
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pool_class->stop = gst_wl_video_buffer_pool_stop;
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pool_class->alloc_buffer = gst_wl_video_buffer_pool_alloc_buffer;
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}
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static void
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gst_wl_video_buffer_pool_init (GstWlVideoBufferPool * self)
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{
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gst_video_info_init (&self->vinfo);
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}
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GstBufferPool *
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gst_wl_video_buffer_pool_new (void)
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{
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return (GstBufferPool *) g_object_new (GST_TYPE_WL_VIDEO_BUFFER_POOL, NULL);
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}
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