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Pass GstVideoInfoDmaDrm or GstVideoInfo whenever possible, avoiding passing strange combination of GstVieoFormat + modifier. Even though we don't have any at the moment, this also allow supporting GstVideoFormat that are not supported in our DRM integration. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5120>
200 lines
5.9 KiB
C
200 lines
5.9 KiB
C
/* GStreamer Wayland Library
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*
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* Copyright (C) 2016 STMicroelectronics SA
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* Copyright (C) 2016 Fabien Dessenne <fabien.dessenne@st.com>
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* Copyright (C) 2022 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 Free
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* Software Foundation, Inc., 51 Franklin Street, 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 "gstwllinuxdmabuf.h"
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#include "linux-dmabuf-unstable-v1-client-protocol.h"
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GST_DEBUG_CATEGORY (gst_wl_dmabuf_debug);
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#define GST_CAT_DEFAULT gst_wl_dmabuf_debug
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void
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gst_wl_linux_dmabuf_init_once (void)
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{
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static gsize _init = 0;
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if (g_once_init_enter (&_init)) {
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GST_DEBUG_CATEGORY_INIT (gst_wl_dmabuf_debug, "wl_dmabuf", 0,
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"wl_dmabuf library");
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g_once_init_leave (&_init, 1);
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}
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}
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typedef struct
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{
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GMutex lock;
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GCond cond;
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struct wl_buffer *wbuf;
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} ConstructBufferData;
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static void
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create_succeeded (void *data, struct zwp_linux_buffer_params_v1 *params,
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struct wl_buffer *new_buffer)
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{
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ConstructBufferData *d = data;
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g_mutex_lock (&d->lock);
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d->wbuf = new_buffer;
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zwp_linux_buffer_params_v1_destroy (params);
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g_cond_signal (&d->cond);
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g_mutex_unlock (&d->lock);
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}
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static void
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create_failed (void *data, struct zwp_linux_buffer_params_v1 *params)
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{
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ConstructBufferData *d = data;
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g_mutex_lock (&d->lock);
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d->wbuf = NULL;
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zwp_linux_buffer_params_v1_destroy (params);
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g_cond_signal (&d->cond);
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g_mutex_unlock (&d->lock);
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}
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static const struct zwp_linux_buffer_params_v1_listener params_listener = {
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create_succeeded,
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create_failed
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};
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struct wl_buffer *
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gst_wl_linux_dmabuf_construct_wl_buffer (GstBuffer * buf,
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GstWlDisplay * display, const GstVideoInfoDmaDrm * drm_info)
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{
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GstMemory *mem;
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guint fourcc;
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guint64 modifier;
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guint i, width = 0, height = 0;
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GstVideoInfo info;
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const gsize *offsets = NULL;
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const gint *strides = NULL;
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GstVideoMeta *vmeta;
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guint nplanes = 0, flags = 0;
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struct zwp_linux_buffer_params_v1 *params;
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gint64 timeout;
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ConstructBufferData data;
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g_return_val_if_fail (gst_wl_display_check_format_for_dmabuf (display,
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drm_info), NULL);
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mem = gst_buffer_peek_memory (buf, 0);
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fourcc = drm_info->drm_fourcc;
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modifier = drm_info->drm_modifier;
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g_cond_init (&data.cond);
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g_mutex_init (&data.lock);
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g_mutex_lock (&data.lock);
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vmeta = gst_buffer_get_video_meta (buf);
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if (vmeta) {
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width = vmeta->width;
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height = vmeta->height;
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nplanes = vmeta->n_planes;
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offsets = vmeta->offset;
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strides = vmeta->stride;
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} else if (gst_video_info_dma_drm_to_video_info (drm_info, &info)) {
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nplanes = GST_VIDEO_INFO_N_PLANES (&info);
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width = info.width;
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height = info.height;
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offsets = info.offset;
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strides = info.stride;
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} else {
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GST_ERROR_OBJECT (display, "GstVideoMeta is needed to carry DMABuf using "
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"'memory:DMABuf' caps feature.");
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goto out;
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}
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GST_DEBUG_OBJECT (display,
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"Creating wl_buffer from DMABuf of size %" G_GSSIZE_FORMAT
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" (%d x %d), DRM fourcc %" GST_FOURCC_FORMAT, gst_buffer_get_size (buf),
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width, height, GST_FOURCC_ARGS (fourcc));
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/* Creation and configuration of planes */
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params = zwp_linux_dmabuf_v1_create_params (gst_wl_display_get_dmabuf_v1
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(display));
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for (i = 0; i < nplanes; i++) {
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guint offset, stride, mem_idx, length;
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gsize skip;
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offset = offsets[i];
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stride = strides[i];
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if (gst_buffer_find_memory (buf, offset, 1, &mem_idx, &length, &skip)) {
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GstMemory *m = gst_buffer_peek_memory (buf, mem_idx);
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gint fd = gst_dmabuf_memory_get_fd (m);
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zwp_linux_buffer_params_v1_add (params, fd, i, m->offset + skip,
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stride, modifier >> 32, modifier & G_GUINT64_CONSTANT (0x0ffffffff));
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} else {
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GST_ERROR_OBJECT (mem->allocator, "memory does not seem to contain "
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"enough data for the specified format");
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zwp_linux_buffer_params_v1_destroy (params);
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data.wbuf = NULL;
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goto out;
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}
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}
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if (GST_BUFFER_FLAG_IS_SET (buf, GST_VIDEO_BUFFER_FLAG_INTERLACED)) {
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GST_DEBUG_OBJECT (mem->allocator, "interlaced buffer");
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flags = ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_INTERLACED;
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if (!GST_BUFFER_FLAG_IS_SET (buf, GST_VIDEO_BUFFER_FLAG_TFF)) {
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GST_DEBUG_OBJECT (mem->allocator, "with bottom field first");
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flags |= ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_BOTTOM_FIRST;
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}
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}
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/* Request buffer creation */
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zwp_linux_buffer_params_v1_add_listener (params, ¶ms_listener, &data);
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zwp_linux_buffer_params_v1_create (params, width, height, fourcc, flags);
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/* Wait for the request answer */
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wl_display_flush (gst_wl_display_get_display (display));
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data.wbuf = (gpointer) 0x1;
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timeout = g_get_monotonic_time () + G_TIME_SPAN_SECOND;
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while (data.wbuf == (gpointer) 0x1) {
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if (!g_cond_wait_until (&data.cond, &data.lock, timeout)) {
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GST_ERROR_OBJECT (mem->allocator, "zwp_linux_buffer_params_v1 time out");
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zwp_linux_buffer_params_v1_destroy (params);
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data.wbuf = NULL;
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}
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}
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out:
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if (!data.wbuf) {
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GST_ERROR_OBJECT (mem->allocator, "can't create linux-dmabuf buffer");
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} else {
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GST_DEBUG_OBJECT (mem->allocator, "created linux_dmabuf wl_buffer (%p):"
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"%dx%d, fmt=%" GST_FOURCC_FORMAT ", %d planes",
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data.wbuf, width, height, GST_FOURCC_ARGS (fourcc), nplanes);
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}
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g_mutex_unlock (&data.lock);
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g_mutex_clear (&data.lock);
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g_cond_clear (&data.cond);
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return data.wbuf;
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}
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