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gstreamer/sys/kms/gstkmssink.c

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/* GStreamer
*
* Copyright (C) 2016 Igalia
*
* Authors:
* Víctor Manuel Jáquez Leal <vjaquez@igalia.com>
* Javier Martin <javiermartin@by.com.es>
*
* 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-kmssink
* @title: kmssink
* @short_description: A KMS/DRM based video sink
*
* kmssink is a simple video sink that renders video frames directly
* in a plane of a DRM device.
*
* ## Example launch line
* |[
* gst-launch-1.0 videotestsrc ! kmssink
* ]|
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/video/video.h>
#include <gst/allocators/gstdmabuf.h>
#include <drm.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <drm_fourcc.h>
#include <string.h>
#include "gstkmssink.h"
#include "gstkmsutils.h"
#include "gstkmsbufferpool.h"
#include "gstkmsallocator.h"
#define GST_PLUGIN_NAME "kmssink"
#define GST_PLUGIN_DESC "Video sink using the Linux kernel mode setting API"
GST_DEBUG_CATEGORY_STATIC (gst_kms_sink_debug);
GST_DEBUG_CATEGORY_STATIC (CAT_PERFORMANCE);
#define GST_CAT_DEFAULT gst_kms_sink_debug
#define parent_class gst_kms_sink_parent_class
G_DEFINE_TYPE_WITH_CODE (GstKMSSink, gst_kms_sink, GST_TYPE_VIDEO_SINK,
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, GST_PLUGIN_NAME, 0,
GST_PLUGIN_DESC);
GST_DEBUG_CATEGORY_GET (CAT_PERFORMANCE, "GST_PERFORMANCE"));
static void gst_kms_sink_drain (GstKMSSink * self);
enum
{
PROP_DRIVER_NAME = 1,
PROP_BUS_ID,
PROP_CONNECTOR_ID,
PROP_PLANE_ID,
PROP_FORCE_MODESETTING,
PROP_N
};
static GParamSpec *g_properties[PROP_N] = { NULL, };
static int
kms_open (gchar ** driver)
{
static const char *drivers[] = { "i915", "radeon", "nouveau", "vmwgfx",
"exynos", "amdgpu", "imx-drm", "rockchip", "atmel-hlcdc", "msm",
"xilinx_drm",
};
int i, fd = -1;
for (i = 0; i < G_N_ELEMENTS (drivers); i++) {
fd = drmOpen (drivers[i], NULL);
if (fd >= 0) {
if (driver)
*driver = g_strdup (drivers[i]);
break;
}
}
return fd;
}
static drmModePlane *
find_plane_for_crtc (int fd, drmModeRes * res, drmModePlaneRes * pres,
int crtc_id)
{
drmModePlane *plane;
int i, pipe;
plane = NULL;
pipe = -1;
for (i = 0; i < res->count_crtcs; i++) {
if (crtc_id == res->crtcs[i]) {
pipe = i;
break;
}
}
if (pipe == -1)
return NULL;
for (i = 0; i < pres->count_planes; i++) {
plane = drmModeGetPlane (fd, pres->planes[i]);
if (plane->possible_crtcs & (1 << pipe))
return plane;
drmModeFreePlane (plane);
}
return NULL;
}
static drmModeCrtc *
find_crtc_for_connector (int fd, drmModeRes * res, drmModeConnector * conn,
guint * pipe)
{
int i;
int crtc_id;
drmModeEncoder *enc;
drmModeCrtc *crtc;
guint32 crtcs_for_connector = 0;
crtc_id = -1;
for (i = 0; i < res->count_encoders; i++) {
enc = drmModeGetEncoder (fd, res->encoders[i]);
if (enc) {
if (enc->encoder_id == conn->encoder_id) {
crtc_id = enc->crtc_id;
drmModeFreeEncoder (enc);
break;
}
drmModeFreeEncoder (enc);
}
}
/* If no active crtc was found, pick the first possible crtc */
if (crtc_id == -1) {
for (i = 0; i < conn->count_encoders; i++) {
enc = drmModeGetEncoder (fd, conn->encoders[i]);
crtcs_for_connector |= enc->possible_crtcs;
drmModeFreeEncoder (enc);
}
if (crtcs_for_connector != 0)
crtc_id = res->crtcs[ffs (crtcs_for_connector) - 1];
}
if (crtc_id == -1)
return NULL;
for (i = 0; i < res->count_crtcs; i++) {
crtc = drmModeGetCrtc (fd, res->crtcs[i]);
if (crtc) {
if (crtc_id == crtc->crtc_id) {
if (pipe)
*pipe = i;
return crtc;
}
drmModeFreeCrtc (crtc);
}
}
return NULL;
}
static gboolean
connector_is_used (int fd, drmModeRes * res, drmModeConnector * conn)
{
gboolean result;
drmModeCrtc *crtc;
result = FALSE;
crtc = find_crtc_for_connector (fd, res, conn, NULL);
if (crtc) {
result = crtc->buffer_id != 0;
drmModeFreeCrtc (crtc);
}
return result;
}
static drmModeConnector *
find_used_connector_by_type (int fd, drmModeRes * res, int type)
{
int i;
drmModeConnector *conn;
conn = NULL;
for (i = 0; i < res->count_connectors; i++) {
conn = drmModeGetConnector (fd, res->connectors[i]);
if (conn) {
if ((conn->connector_type == type) && connector_is_used (fd, res, conn))
return conn;
drmModeFreeConnector (conn);
}
}
return NULL;
}
static drmModeConnector *
find_first_used_connector (int fd, drmModeRes * res)
{
int i;
drmModeConnector *conn;
conn = NULL;
for (i = 0; i < res->count_connectors; i++) {
conn = drmModeGetConnector (fd, res->connectors[i]);
if (conn) {
if (connector_is_used (fd, res, conn))
return conn;
drmModeFreeConnector (conn);
}
}
return NULL;
}
static drmModeConnector *
find_main_monitor (int fd, drmModeRes * res)
{
/* Find the LVDS and eDP connectors: those are the main screens. */
static const int priority[] = { DRM_MODE_CONNECTOR_LVDS,
DRM_MODE_CONNECTOR_eDP
};
int i;
drmModeConnector *conn;
conn = NULL;
for (i = 0; !conn && i < G_N_ELEMENTS (priority); i++)
conn = find_used_connector_by_type (fd, res, priority[i]);
/* if we didn't find a connector, grab the first one in use */
if (!conn)
conn = find_first_used_connector (fd, res);
/* if no connector is used, grab the first one */
if (!conn)
conn = drmModeGetConnector (fd, res->connectors[0]);
return conn;
}
static void
log_drm_version (GstKMSSink * self)
{
#ifndef GST_DISABLE_GST_DEBUG
drmVersion *v;
v = drmGetVersion (self->fd);
if (v) {
GST_INFO_OBJECT (self, "DRM v%d.%d.%d [%s — %s — %s]", v->version_major,
v->version_minor, v->version_patchlevel, GST_STR_NULL (v->name),
GST_STR_NULL (v->desc), GST_STR_NULL (v->date));
drmFreeVersion (v);
} else {
GST_WARNING_OBJECT (self, "could not get driver information: %s",
GST_STR_NULL (self->devname));
}
#endif
return;
}
static gboolean
get_drm_caps (GstKMSSink * self)
{
gint ret;
guint64 has_dumb_buffer;
guint64 has_prime;
guint64 has_async_page_flip;
has_dumb_buffer = 0;
ret = drmGetCap (self->fd, DRM_CAP_DUMB_BUFFER, &has_dumb_buffer);
if (ret)
GST_WARNING_OBJECT (self, "could not get dumb buffer capability");
if (has_dumb_buffer == 0) {
GST_ERROR_OBJECT (self, "driver cannot handle dumb buffers");
return FALSE;
}
has_prime = 0;
ret = drmGetCap (self->fd, DRM_CAP_PRIME, &has_prime);
if (ret)
GST_WARNING_OBJECT (self, "could not get prime capability");
else
self->has_prime_import = (gboolean) (has_prime & DRM_PRIME_CAP_IMPORT);
has_async_page_flip = 0;
ret = drmGetCap (self->fd, DRM_CAP_ASYNC_PAGE_FLIP, &has_async_page_flip);
if (ret)
GST_WARNING_OBJECT (self, "could not get async page flip capability");
else
self->has_async_page_flip = (gboolean) has_async_page_flip;
GST_INFO_OBJECT (self, "prime import (%s) / async page flip (%s)",
self->has_prime_import ? "✓" : "✗",
self->has_async_page_flip ? "✓" : "✗");
return TRUE;
}
static gboolean
configure_mode_setting (GstKMSSink * self, GstVideoInfo * vinfo)
{
gboolean ret;
drmModeConnector *conn;
int err;
drmModeFB *fb;
gint i;
drmModeModeInfo *mode;
guint32 fb_id;
GstKMSMemory *kmsmem;
ret = FALSE;
conn = NULL;
fb = NULL;
mode = NULL;
kmsmem = NULL;
if (self->conn_id < 0)
goto bail;
GST_INFO_OBJECT (self, "configuring mode setting");
kmsmem = (GstKMSMemory *) gst_kms_allocator_bo_alloc (self->allocator, vinfo);
if (!kmsmem)
goto bo_failed;
fb_id = kmsmem->fb_id;
conn = drmModeGetConnector (self->fd, self->conn_id);
if (!conn)
goto connector_failed;
fb = drmModeGetFB (self->fd, fb_id);
if (!fb)
goto framebuffer_failed;
for (i = 0; i < conn->count_modes; i++) {
if (conn->modes[i].vdisplay == fb->height &&
conn->modes[i].hdisplay == fb->width) {
mode = &conn->modes[i];
break;
}
}
if (!mode)
goto mode_failed;
err = drmModeSetCrtc (self->fd, self->crtc_id, fb_id, 0, 0,
(uint32_t *) & self->conn_id, 1, mode);
if (err)
goto modesetting_failed;
self->tmp_kmsmem = (GstMemory *) kmsmem;
ret = TRUE;
bail:
if (fb)
drmModeFreeFB (fb);
if (conn)
drmModeFreeConnector (conn);
return ret;
/* ERRORS */
bo_failed:
{
GST_ERROR_OBJECT (self,
"failed to allocate buffer object for mode setting");
goto bail;
}
connector_failed:
{
GST_ERROR_OBJECT (self, "Could not find a valid monitor connector");
goto bail;
}
framebuffer_failed:
{
GST_ERROR_OBJECT (self, "drmModeGetFB failed: %s (%d)",
strerror (errno), errno);
goto bail;
}
mode_failed:
{
GST_ERROR_OBJECT (self, "cannot find appropriate mode");
goto bail;
}
modesetting_failed:
{
GST_ERROR_OBJECT (self, "Failed to set mode: %s", strerror (errno));
goto bail;
}
}
static gboolean
ensure_allowed_caps (GstKMSSink * self, drmModeConnector * conn,
drmModePlane * plane, drmModeRes * res)
{
GstCaps *out_caps, *tmp_caps, *caps;
int i, j;
GstVideoFormat fmt;
const gchar *format;
drmModeModeInfo *mode;
gint count_modes;
if (self->allowed_caps)
return TRUE;
out_caps = gst_caps_new_empty ();
if (!out_caps)
return FALSE;
if (conn && self->modesetting_enabled)
count_modes = conn->count_modes;
else
count_modes = 1;
for (i = 0; i < count_modes; i++) {
tmp_caps = gst_caps_new_empty ();
if (!tmp_caps)
return FALSE;
mode = NULL;
if (conn && self->modesetting_enabled)
mode = &conn->modes[i];
for (j = 0; j < plane->count_formats; j++) {
fmt = gst_video_format_from_drm (plane->formats[j]);
if (fmt == GST_VIDEO_FORMAT_UNKNOWN) {
GST_INFO_OBJECT (self, "ignoring format %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (plane->formats[j]));
continue;
}
format = gst_video_format_to_string (fmt);
if (mode) {
caps = gst_caps_new_simple ("video/x-raw",
"format", G_TYPE_STRING, format,
"width", G_TYPE_INT, mode->hdisplay,
"height", G_TYPE_INT, mode->vdisplay,
"framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
} else {
caps = gst_caps_new_simple ("video/x-raw",
"format", G_TYPE_STRING, format,
"width", GST_TYPE_INT_RANGE, res->min_width, res->max_width,
"height", GST_TYPE_INT_RANGE, res->min_height, res->max_height,
"framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
}
if (!caps)
continue;
tmp_caps = gst_caps_merge (tmp_caps, caps);
}
out_caps = gst_caps_merge (out_caps, gst_caps_simplify (tmp_caps));
}
self->allowed_caps = gst_caps_simplify (out_caps);
GST_DEBUG_OBJECT (self, "allowed caps = %" GST_PTR_FORMAT,
self->allowed_caps);
return (self->allowed_caps && !gst_caps_is_empty (self->allowed_caps));
}
static GstMemory *
get_cached_kmsmem (GstMemory * mem)
{
return gst_mini_object_get_qdata (GST_MINI_OBJECT (mem),
g_quark_from_static_string ("kmsmem"));
}
static void
cached_kmsmem_disposed_cb (GstKMSSink * self, GstMiniObject * obj)
{
GST_OBJECT_LOCK (self);
self->mem_cache = g_list_remove (self->mem_cache, obj);
GST_OBJECT_UNLOCK (self);
}
static void
clear_cached_kmsmem (GstKMSSink * self)
{
GList *iter;
GST_OBJECT_LOCK (self);
iter = self->mem_cache;
while (iter) {
GstMiniObject *obj = iter->data;
gst_mini_object_weak_unref (obj,
(GstMiniObjectNotify) cached_kmsmem_disposed_cb, self);
gst_mini_object_set_qdata (obj,
g_quark_from_static_string ("kmsmem"), NULL, NULL);
iter = iter->next;
}
g_list_free (self->mem_cache);
self->mem_cache = NULL;
GST_OBJECT_UNLOCK (self);
}
static void
set_cached_kmsmem (GstKMSSink * self, GstMemory * mem, GstMemory * kmsmem)
{
GST_OBJECT_LOCK (self);
gst_mini_object_weak_ref (GST_MINI_OBJECT (mem),
(GstMiniObjectNotify) cached_kmsmem_disposed_cb, self);
self->mem_cache = g_list_prepend (self->mem_cache, mem);
GST_OBJECT_UNLOCK (self);
return gst_mini_object_set_qdata (GST_MINI_OBJECT (mem),
g_quark_from_static_string ("kmsmem"), kmsmem,
(GDestroyNotify) gst_memory_unref);
}
static gboolean
gst_kms_sink_start (GstBaseSink * bsink)
{
GstKMSSink *self;
drmModeRes *res;
drmModeConnector *conn;
drmModeCrtc *crtc;
drmModePlaneRes *pres;
drmModePlane *plane;
gboolean universal_planes;
gboolean ret;
self = GST_KMS_SINK (bsink);
universal_planes = FALSE;
ret = FALSE;
res = NULL;
conn = NULL;
crtc = NULL;
pres = NULL;
plane = NULL;
if (self->devname || self->bus_id)
self->fd = drmOpen (self->devname, self->bus_id);
else
self->fd = kms_open (&self->devname);
if (self->fd < 0)
goto open_failed;
log_drm_version (self);
if (!get_drm_caps (self))
goto bail;
self->can_scale = TRUE;
res = drmModeGetResources (self->fd);
if (!res)
goto resources_failed;
if (self->conn_id == -1)
conn = find_main_monitor (self->fd, res);
else
conn = drmModeGetConnector (self->fd, self->conn_id);
if (!conn)
goto connector_failed;
crtc = find_crtc_for_connector (self->fd, res, conn, &self->pipe);
if (!crtc)
goto crtc_failed;
if (!crtc->mode_valid || self->modesetting_enabled) {
GST_DEBUG_OBJECT (self, "enabling modesetting");
self->modesetting_enabled = TRUE;
universal_planes = TRUE;
}
retry_find_plane:
if (universal_planes &&
drmSetClientCap (self->fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1))
goto set_cap_failed;
pres = drmModeGetPlaneResources (self->fd);
if (!pres)
goto plane_resources_failed;
if (self->plane_id == -1)
plane = find_plane_for_crtc (self->fd, res, pres, crtc->crtc_id);
else
plane = drmModeGetPlane (self->fd, self->plane_id);
if (!plane)
goto plane_failed;
if (!ensure_allowed_caps (self, conn, plane, res))
goto allowed_caps_failed;
self->conn_id = conn->connector_id;
self->crtc_id = crtc->crtc_id;
self->plane_id = plane->plane_id;
GST_INFO_OBJECT (self, "connector id = %d / crtc id = %d / plane id = %d",
self->conn_id, self->crtc_id, self->plane_id);
self->hdisplay = crtc->mode.hdisplay;
self->vdisplay = crtc->mode.vdisplay;
self->buffer_id = crtc->buffer_id;
self->mm_width = conn->mmWidth;
self->mm_height = conn->mmHeight;
GST_INFO_OBJECT (self, "display size: pixels = %dx%d / millimeters = %dx%d",
self->hdisplay, self->vdisplay, self->mm_width, self->mm_height);
self->pollfd.fd = self->fd;
gst_poll_add_fd (self->poll, &self->pollfd);
gst_poll_fd_ctl_read (self->poll, &self->pollfd, TRUE);
ret = TRUE;
bail:
if (plane)
drmModeFreePlane (plane);
if (pres)
drmModeFreePlaneResources (pres);
if (crtc)
drmModeFreeCrtc (crtc);
if (conn)
drmModeFreeConnector (conn);
if (res)
drmModeFreeResources (res);
if (!ret && self->fd >= 0) {
drmClose (self->fd);
self->fd = -1;
}
return ret;
/* ERRORS */
open_failed:
{
GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
("Could not open DRM module %s", GST_STR_NULL (self->devname)),
("reason: %s (%d)", strerror (errno), errno));
return FALSE;
}
resources_failed:
{
GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
("drmModeGetResources failed"),
("reason: %s (%d)", strerror (errno), errno));
goto bail;
}
connector_failed:
{
GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
("Could not find a valid monitor connector"), (NULL));
goto bail;
}
crtc_failed:
{
GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
("Could not find a crtc for connector"), (NULL));
goto bail;
}
set_cap_failed:
{
GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
("Could not set universal planes capability bit"), (NULL));
goto bail;
}
plane_resources_failed:
{
GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
("drmModeGetPlaneResources failed"),
("reason: %s (%d)", strerror (errno), errno));
goto bail;
}
plane_failed:
{
if (universal_planes) {
GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
("Could not find a plane for crtc"), (NULL));
goto bail;
} else {
universal_planes = TRUE;
goto retry_find_plane;
}
}
allowed_caps_failed:
{
GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
("Could not get allowed GstCaps of device"),
("driver does not provide mode settings configuration"));
goto bail;
}
}
static gboolean
gst_kms_sink_stop (GstBaseSink * bsink)
{
GstKMSSink *self;
self = GST_KMS_SINK (bsink);
clear_cached_kmsmem (self);
gst_buffer_replace (&self->last_buffer, NULL);
gst_caps_replace (&self->allowed_caps, NULL);
gst_object_replace ((GstObject **) & self->pool, NULL);
gst_object_replace ((GstObject **) & self->allocator, NULL);
gst_poll_remove_fd (self->poll, &self->pollfd);
gst_poll_restart (self->poll);
gst_poll_fd_init (&self->pollfd);
if (self->fd >= 0) {
drmClose (self->fd);
self->fd = -1;
}
return TRUE;
}
static GstCaps *
gst_kms_sink_get_allowed_caps (GstKMSSink * self)
{
if (!self->allowed_caps)
return NULL; /* base class will return the template caps */
return gst_caps_ref (self->allowed_caps);
}
static GstCaps *
gst_kms_sink_get_caps (GstBaseSink * bsink, GstCaps * filter)
{
GstKMSSink *self;
GstCaps *caps, *out_caps;
self = GST_KMS_SINK (bsink);
caps = gst_kms_sink_get_allowed_caps (self);
if (caps && filter) {
out_caps = gst_caps_intersect_full (caps, filter, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (caps);
} else {
out_caps = caps;
}
return out_caps;
}
static void
ensure_kms_allocator (GstKMSSink * self)
{
if (self->allocator)
return;
self->allocator = gst_kms_allocator_new (self->fd);
}
static GstBufferPool *
gst_kms_sink_create_pool (GstKMSSink * self, GstCaps * caps, gsize size,
gint min)
{
GstBufferPool *pool;
GstStructure *config;
pool = gst_kms_buffer_pool_new ();
if (!pool)
goto pool_failed;
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, min, 0);
gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
ensure_kms_allocator (self);
gst_buffer_pool_config_set_allocator (config, self->allocator, NULL);
if (!gst_buffer_pool_set_config (pool, config))
goto config_failed;
return pool;
/* ERRORS */
pool_failed:
{
GST_ERROR_OBJECT (self, "failed to create buffer pool");
return NULL;
}
config_failed:
{
GST_ERROR_OBJECT (self, "failed to set config");
gst_object_unref (pool);
return NULL;
}
}
static gboolean
gst_kms_sink_calculate_display_ratio (GstKMSSink * self, GstVideoInfo * vinfo)
{
guint dar_n, dar_d;
guint video_width, video_height;
guint video_par_n, video_par_d;
guint dpy_par_n, dpy_par_d;
video_width = GST_VIDEO_INFO_WIDTH (vinfo);
video_height = GST_VIDEO_INFO_HEIGHT (vinfo);
video_par_n = GST_VIDEO_INFO_PAR_N (vinfo);
video_par_d = GST_VIDEO_INFO_PAR_D (vinfo);
gst_video_calculate_device_ratio (self->hdisplay, self->vdisplay,
self->mm_width, self->mm_height, &dpy_par_n, &dpy_par_d);
if (!gst_video_calculate_display_ratio (&dar_n, &dar_d, video_width,
video_height, video_par_n, video_par_d, dpy_par_n, dpy_par_d))
return FALSE;
GST_DEBUG_OBJECT (self, "video calculated display ratio: %d/%d", dar_n,
dar_d);
/* now find a width x height that respects this display ratio.
* prefer those that have one of w/h the same as the incoming video
* using wd / hd = dar_n / dar_d */
/* start with same height, because of interlaced video */
/* check hd / dar_d is an integer scale factor, and scale wd with the PAR */
if (video_height % dar_d == 0) {
GST_DEBUG_OBJECT (self, "keeping video height");
GST_VIDEO_SINK_WIDTH (self) = (guint)
gst_util_uint64_scale_int (video_height, dar_n, dar_d);
GST_VIDEO_SINK_HEIGHT (self) = video_height;
} else if (video_width % dar_n == 0) {
GST_DEBUG_OBJECT (self, "keeping video width");
GST_VIDEO_SINK_WIDTH (self) = video_width;
GST_VIDEO_SINK_HEIGHT (self) = (guint)
gst_util_uint64_scale_int (video_width, dar_d, dar_n);
} else {
GST_DEBUG_OBJECT (self, "approximating while keeping video height");
GST_VIDEO_SINK_WIDTH (self) = (guint)
gst_util_uint64_scale_int (video_height, dar_n, dar_d);
GST_VIDEO_SINK_HEIGHT (self) = video_height;
}
GST_DEBUG_OBJECT (self, "scaling to %dx%d", GST_VIDEO_SINK_WIDTH (self),
GST_VIDEO_SINK_HEIGHT (self));
return TRUE;
}
static gboolean
gst_kms_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstKMSSink *self;
GstVideoInfo vinfo;
GstBufferPool *newpool, *oldpool;
self = GST_KMS_SINK (bsink);
/* We are going to change the internal buffer pool, which means it will no
* longer be compatbile with the last_buffer size. Drain now, as we won't be
* able to do that later on. */
gst_kms_sink_drain (self);
if (!gst_video_info_from_caps (&vinfo, caps))
goto invalid_format;
if (!gst_kms_sink_calculate_display_ratio (self, &vinfo))
goto no_disp_ratio;
if (GST_VIDEO_SINK_WIDTH (self) <= 0 || GST_VIDEO_SINK_HEIGHT (self) <= 0)
goto invalid_size;
/* create a new pool for the new configuration */
newpool = gst_kms_sink_create_pool (self, caps, GST_VIDEO_INFO_SIZE (&vinfo),
2);
if (!newpool)
goto no_pool;
/* we don't activate the internal pool yet as it may not be needed */
oldpool = self->pool;
self->pool = newpool;
if (oldpool) {
gst_buffer_pool_set_active (oldpool, FALSE);
gst_object_unref (oldpool);
}
if (self->modesetting_enabled && !configure_mode_setting (self, &vinfo))
goto modesetting_failed;
self->vinfo = vinfo;
GST_DEBUG_OBJECT (self, "negotiated caps = %" GST_PTR_FORMAT, caps);
return TRUE;
/* ERRORS */
invalid_format:
{
GST_ERROR_OBJECT (self, "caps invalid");
return FALSE;
}
invalid_size:
{
GST_ELEMENT_ERROR (self, CORE, NEGOTIATION, (NULL),
("Invalid image size."));
return FALSE;
}
no_disp_ratio:
{
GST_ELEMENT_ERROR (self, CORE, NEGOTIATION, (NULL),
("Error calculating the output display ratio of the video."));
return FALSE;
}
no_pool:
{
/* Already warned in create_pool */
return FALSE;
}
modesetting_failed:
{
GST_ELEMENT_ERROR (self, CORE, NEGOTIATION, (NULL),
("failed to configure video mode"));
return FALSE;
}
}
static gboolean
gst_kms_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
{
GstKMSSink *self;
GstCaps *caps;
gboolean need_pool;
GstVideoInfo vinfo;
GstBufferPool *pool;
gsize size;
self = GST_KMS_SINK (bsink);
gst_query_parse_allocation (query, &caps, &need_pool);
if (!caps)
goto no_caps;
if (!gst_video_info_from_caps (&vinfo, caps))
goto invalid_caps;
size = GST_VIDEO_INFO_SIZE (&vinfo);
pool = NULL;
if (need_pool) {
pool = gst_kms_sink_create_pool (self, caps, size, 0);
if (!pool)
goto no_pool;
}
if (pool) {
/* we need at least 2 buffer because we hold on to the last one */
gst_query_add_allocation_pool (query, pool, size, 2, 0);
gst_object_unref (pool);
}
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
gst_query_add_allocation_meta (query, GST_VIDEO_CROP_META_API_TYPE, NULL);
return TRUE;
/* ERRORS */
no_caps:
{
GST_DEBUG_OBJECT (bsink, "no caps specified");
return FALSE;
}
invalid_caps:
{
GST_DEBUG_OBJECT (bsink, "invalid caps specified");
return FALSE;
}
no_pool:
{
/* Already warned in create_pool */
return FALSE;
}
}
static void
sync_handler (gint fd, guint frame, guint sec, guint usec, gpointer data)
{
gboolean *waiting;
waiting = data;
*waiting = FALSE;
}
static gboolean
gst_kms_sink_sync (GstKMSSink * self)
{
gint ret;
gboolean waiting;
drmEventContext evctxt = {
.version = DRM_EVENT_CONTEXT_VERSION,
.page_flip_handler = sync_handler,
.vblank_handler = sync_handler,
};
drmVBlank vbl = {
.request = {
.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT,
.sequence = 1,
.signal = (gulong) & waiting,
},
};
if (self->pipe == 1)
vbl.request.type |= DRM_VBLANK_SECONDARY;
else if (self->pipe > 1)
vbl.request.type |= self->pipe << DRM_VBLANK_HIGH_CRTC_SHIFT;
waiting = TRUE;
if (!self->has_async_page_flip && !self->modesetting_enabled) {
ret = drmWaitVBlank (self->fd, &vbl);
if (ret)
goto vblank_failed;
} else {
ret = drmModePageFlip (self->fd, self->crtc_id, self->buffer_id,
DRM_MODE_PAGE_FLIP_EVENT, &waiting);
if (ret)
goto pageflip_failed;
}
while (waiting) {
do {
ret = gst_poll_wait (self->poll, 3 * GST_SECOND);
} while (ret == -1 && (errno == EAGAIN || errno == EINTR));
ret = drmHandleEvent (self->fd, &evctxt);
if (ret)
goto event_failed;
}
return TRUE;
/* ERRORS */
vblank_failed:
{
GST_WARNING_OBJECT (self, "drmWaitVBlank failed: %s (%d)", strerror (-ret),
ret);
return FALSE;
}
pageflip_failed:
{
GST_WARNING_OBJECT (self, "drmModePageFlip failed: %s (%d)",
strerror (-ret), ret);
return FALSE;
}
event_failed:
{
GST_ERROR_OBJECT (self, "drmHandleEvent failed: %s (%d)", strerror (-ret),
ret);
return FALSE;
}
}
static gboolean
gst_kms_sink_import_dmabuf (GstKMSSink * self, GstBuffer * inbuf,
GstBuffer ** outbuf)
{
gint prime_fds[GST_VIDEO_MAX_PLANES] = { 0, };
GstVideoMeta *meta;
guint i, n_mem, n_planes;
GstKMSMemory *kmsmem;
guint mems_idx[GST_VIDEO_MAX_PLANES];
gsize mems_skip[GST_VIDEO_MAX_PLANES];
GstMemory *mems[GST_VIDEO_MAX_PLANES];
if (!self->has_prime_import)
return FALSE;
/* This will eliminate most non-dmabuf out there */
if (!gst_is_dmabuf_memory (gst_buffer_peek_memory (inbuf, 0)))
return FALSE;
n_planes = GST_VIDEO_INFO_N_PLANES (&self->vinfo);
n_mem = gst_buffer_n_memory (inbuf);
meta = gst_buffer_get_video_meta (inbuf);
GST_TRACE_OBJECT (self, "Found a dmabuf with %u planes and %u memories",
n_planes, n_mem);
/* We cannot have multiple dmabuf per plane */
if (n_mem > n_planes)
return FALSE;
g_assert (n_planes != 0);
/* Update video info based on video meta */
if (meta) {
GST_VIDEO_INFO_WIDTH (&self->vinfo) = meta->width;
GST_VIDEO_INFO_HEIGHT (&self->vinfo) = meta->height;
for (i = 0; i < meta->n_planes; i++) {
GST_VIDEO_INFO_PLANE_OFFSET (&self->vinfo, i) = meta->offset[i];
GST_VIDEO_INFO_PLANE_STRIDE (&self->vinfo, i) = meta->stride[i];
}
}
/* Find and validate all memories */
for (i = 0; i < n_planes; i++) {
guint length;
if (!gst_buffer_find_memory (inbuf,
GST_VIDEO_INFO_PLANE_OFFSET (&self->vinfo, i), 1,
&mems_idx[i], &length, &mems_skip[i]))
return FALSE;
mems[i] = gst_buffer_peek_memory (inbuf, mems_idx[i]);
/* adjust for memory offset, in case data does not
* start from byte 0 in the dmabuf fd */
mems_skip[i] += mems[i]->offset;
/* And all memory found must be dmabuf */
if (!gst_is_dmabuf_memory (mems[i]))
return FALSE;
}
kmsmem = (GstKMSMemory *) get_cached_kmsmem (mems[0]);
if (kmsmem) {
GST_LOG_OBJECT (self, "found KMS mem %p in DMABuf mem %p with fb id = %d",
kmsmem, mems[0], kmsmem->fb_id);
goto wrap_mem;
}
for (i = 0; i < n_planes; i++)
prime_fds[i] = gst_dmabuf_memory_get_fd (mems[i]);
GST_LOG_OBJECT (self, "found these prime ids: %d, %d, %d, %d", prime_fds[0],
prime_fds[1], prime_fds[2], prime_fds[3]);
kmsmem = gst_kms_allocator_dmabuf_import (self->allocator, prime_fds,
n_planes, mems_skip, &self->vinfo);
if (!kmsmem)
return FALSE;
GST_LOG_OBJECT (self, "setting KMS mem %p to DMABuf mem %p with fb id = %d",
kmsmem, mems[0], kmsmem->fb_id);
set_cached_kmsmem (self, mems[0], GST_MEMORY_CAST (kmsmem));
wrap_mem:
*outbuf = gst_buffer_new ();
if (!*outbuf)
return FALSE;
gst_buffer_append_memory (*outbuf, gst_memory_ref (GST_MEMORY_CAST (kmsmem)));
gst_buffer_add_parent_buffer_meta (*outbuf, inbuf);
return TRUE;
}
static GstBuffer *
gst_kms_sink_copy_to_dumb_buffer (GstKMSSink * self, GstBuffer * inbuf)
{
GstFlowReturn ret;
GstVideoFrame inframe, outframe;
gboolean success;
GstBuffer *buf;
buf = NULL;
if (!gst_buffer_pool_set_active (self->pool, TRUE))
goto activate_pool_failed;
ret = gst_buffer_pool_acquire_buffer (self->pool, &buf, NULL);
if (ret != GST_FLOW_OK)
goto create_buffer_failed;
if (!gst_video_frame_map (&inframe, &self->vinfo, inbuf, GST_MAP_READ))
goto error_map_src_buffer;
if (!gst_video_frame_map (&outframe, &self->vinfo, buf, GST_MAP_WRITE))
goto error_map_dst_buffer;
success = gst_video_frame_copy (&outframe, &inframe);
gst_video_frame_unmap (&outframe);
gst_video_frame_unmap (&inframe);
if (!success)
goto error_copy_buffer;
return buf;
bail:
{
if (buf)
gst_buffer_unref (buf);
return NULL;
}
/* ERRORS */
activate_pool_failed:
{
GST_ELEMENT_ERROR (self, STREAM, FAILED, ("failed to activate buffer pool"),
("failed to activate buffer pool"));
goto bail;
}
create_buffer_failed:
{
GST_ELEMENT_ERROR (self, STREAM, FAILED, ("allocation failed"),
("failed to create buffer"));
goto bail;
}
error_copy_buffer:
{
GST_WARNING_OBJECT (self, "failed to upload buffer");
goto bail;
}
error_map_dst_buffer:
{
gst_video_frame_unmap (&inframe);
/* fall-through */
}
error_map_src_buffer:
{
GST_WARNING_OBJECT (self, "failed to map buffer");
goto bail;
}
}
static GstBuffer *
gst_kms_sink_get_input_buffer (GstKMSSink * self, GstBuffer * inbuf)
{
GstMemory *mem;
GstBuffer *buf = NULL;
mem = gst_buffer_peek_memory (inbuf, 0);
if (!mem)
return NULL;
if (gst_is_kms_memory (mem))
return gst_buffer_ref (inbuf);
if (gst_kms_sink_import_dmabuf (self, inbuf, &buf))
return buf;
GST_CAT_INFO_OBJECT (CAT_PERFORMANCE, self, "frame copy");
return gst_kms_sink_copy_to_dumb_buffer (self, inbuf);
}
static GstFlowReturn
gst_kms_sink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
{
gint ret;
GstBuffer *buffer;
guint32 fb_id;
GstKMSSink *self;
GstVideoCropMeta *crop;
GstVideoRectangle src = { 0, };
GstVideoRectangle dst = { 0, };
GstVideoRectangle result;
GstFlowReturn res;
self = GST_KMS_SINK (vsink);
res = GST_FLOW_ERROR;
buffer = gst_kms_sink_get_input_buffer (self, buf);
if (!buffer)
return GST_FLOW_ERROR;
fb_id = gst_kms_memory_get_fb_id (gst_buffer_peek_memory (buffer, 0));
if (fb_id == 0)
goto buffer_invalid;
GST_TRACE_OBJECT (self, "displaying fb %d", fb_id);
if (self->modesetting_enabled) {
self->buffer_id = fb_id;
goto sync_frame;
}
if ((crop = gst_buffer_get_video_crop_meta (buffer))) {
GstVideoInfo vinfo = self->vinfo;
vinfo.width = crop->width;
vinfo.height = crop->height;
if (!gst_kms_sink_calculate_display_ratio (self, &vinfo))
goto no_disp_ratio;
src.x = crop->x;
src.y = crop->y;
}
src.w = GST_VIDEO_SINK_WIDTH (self);
src.h = GST_VIDEO_SINK_HEIGHT (self);
dst.w = self->hdisplay;
dst.h = self->vdisplay;
retry_set_plane:
gst_video_sink_center_rect (src, dst, &result, self->can_scale);
if (crop) {
src.w = crop->width;
src.h = crop->height;
} else {
src.w = GST_VIDEO_INFO_WIDTH (&self->vinfo);
src.h = GST_VIDEO_INFO_HEIGHT (&self->vinfo);
}
GST_TRACE_OBJECT (self,
"drmModeSetPlane at (%i,%i) %ix%i sourcing at (%i,%i) %ix%i",
result.x, result.y, result.w, result.h, src.x, src.y, src.w, src.h);
ret = drmModeSetPlane (self->fd, self->plane_id, self->crtc_id, fb_id, 0,
result.x, result.y, result.w, result.h,
/* source/cropping coordinates are given in Q16 */
src.x << 16, src.y << 16, src.w << 16, src.h << 16);
if (ret) {
if (self->can_scale) {
self->can_scale = FALSE;
goto retry_set_plane;
}
goto set_plane_failed;
}
sync_frame:
/* Wait for the previous frame to complete redraw */
if (!gst_kms_sink_sync (self))
goto bail;
gst_buffer_replace (&self->last_buffer, buffer);
g_clear_pointer (&self->tmp_kmsmem, gst_memory_unref);
res = GST_FLOW_OK;
bail:
gst_buffer_unref (buffer);
return res;
/* ERRORS */
buffer_invalid:
{
GST_ERROR_OBJECT (self, "invalid buffer: it doesn't have a fb id");
goto bail;
}
set_plane_failed:
{
GST_DEBUG_OBJECT (self, "result = { %d, %d, %d, %d} / "
"src = { %d, %d, %d %d } / dst = { %d, %d, %d %d }", result.x, result.y,
result.w, result.h, src.x, src.y, src.w, src.h, dst.x, dst.y, dst.w,
dst.h);
GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
(NULL), ("drmModeSetPlane failed: %s (%d)", strerror (-ret), ret));
goto bail;
}
no_disp_ratio:
{
GST_ELEMENT_ERROR (self, CORE, NEGOTIATION, (NULL),
("Error calculating the output display ratio of the video."));
goto bail;
}
}
static void
gst_kms_sink_drain (GstKMSSink * self)
{
GstParentBufferMeta *parent_meta;
GST_DEBUG_OBJECT (self, "draining");
if (!self->last_buffer)
return;
/* We only need to return the last_buffer if it depends on upstream buffer.
* In this case, the last_buffer will have a GstParentBufferMeta set. */
parent_meta = gst_buffer_get_parent_buffer_meta (self->last_buffer);
if (parent_meta) {
GstBuffer *dumb_buf;
dumb_buf = gst_kms_sink_copy_to_dumb_buffer (self, parent_meta->buffer);
clear_cached_kmsmem (self);
gst_kms_sink_show_frame (GST_VIDEO_SINK (self), dumb_buf);
}
}
static gboolean
gst_kms_sink_query (GstBaseSink * bsink, GstQuery * query)
{
GstKMSSink *self = GST_KMS_SINK (bsink);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_ALLOCATION:
case GST_QUERY_DRAIN:
{
gst_kms_sink_drain (self);
break;
}
default:
break;
}
return GST_BASE_SINK_CLASS (parent_class)->query (bsink, query);
}
static void
gst_kms_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstKMSSink *sink;
sink = GST_KMS_SINK (object);
switch (prop_id) {
case PROP_DRIVER_NAME:
g_free (sink->devname);
sink->devname = g_value_dup_string (value);
break;
case PROP_BUS_ID:
g_free (sink->bus_id);
sink->bus_id = g_value_dup_string (value);
break;
case PROP_CONNECTOR_ID:
sink->conn_id = g_value_get_int (value);
break;
case PROP_PLANE_ID:
sink->plane_id = g_value_get_int (value);
break;
case PROP_FORCE_MODESETTING:
sink->modesetting_enabled = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_kms_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstKMSSink *sink;
sink = GST_KMS_SINK (object);
switch (prop_id) {
case PROP_DRIVER_NAME:
g_value_take_string (value, sink->devname);
break;
case PROP_BUS_ID:
g_value_take_string (value, sink->bus_id);
break;
case PROP_CONNECTOR_ID:
g_value_set_int (value, sink->conn_id);
break;
case PROP_PLANE_ID:
g_value_set_int (value, sink->plane_id);
break;
case PROP_FORCE_MODESETTING:
g_value_set_boolean (value, sink->modesetting_enabled);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_kms_sink_finalize (GObject * object)
{
GstKMSSink *sink;
sink = GST_KMS_SINK (object);
g_clear_pointer (&sink->devname, g_free);
g_clear_pointer (&sink->bus_id, g_free);
gst_poll_free (sink->poll);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_kms_sink_init (GstKMSSink * sink)
{
sink->fd = -1;
sink->conn_id = -1;
sink->plane_id = -1;
gst_poll_fd_init (&sink->pollfd);
sink->poll = gst_poll_new (TRUE);
gst_video_info_init (&sink->vinfo);
}
static void
gst_kms_sink_class_init (GstKMSSinkClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
GstBaseSinkClass *basesink_class;
GstVideoSinkClass *videosink_class;
GstCaps *caps;
gobject_class = G_OBJECT_CLASS (klass);
element_class = GST_ELEMENT_CLASS (klass);
basesink_class = GST_BASE_SINK_CLASS (klass);
videosink_class = GST_VIDEO_SINK_CLASS (klass);
gst_element_class_set_static_metadata (element_class, "KMS video sink",
"Sink/Video", GST_PLUGIN_DESC, "Víctor Jáquez <vjaquez@igalia.com>");
caps = gst_kms_sink_caps_template_fill ();
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, caps));
gst_caps_unref (caps);
basesink_class->start = GST_DEBUG_FUNCPTR (gst_kms_sink_start);
basesink_class->stop = GST_DEBUG_FUNCPTR (gst_kms_sink_stop);
basesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_kms_sink_set_caps);
basesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_kms_sink_get_caps);
basesink_class->propose_allocation = gst_kms_sink_propose_allocation;
basesink_class->query = gst_kms_sink_query;
videosink_class->show_frame = gst_kms_sink_show_frame;
gobject_class->finalize = gst_kms_sink_finalize;
gobject_class->set_property = gst_kms_sink_set_property;
gobject_class->get_property = gst_kms_sink_get_property;
/**
* kmssink:driver-name:
*
* If you have a system with multiple GPUs, you can choose which GPU
* to use setting the DRM device driver name. Otherwise, the first
* one from an internal list is used.
*/
g_properties[PROP_DRIVER_NAME] = g_param_spec_string ("driver-name",
"device name", "DRM device driver name", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT);
/**
* kmssink:bus-id:
*
* If you have a system with multiple displays for the same driver-name,
* you can choose which display to use by setting the DRM bus ID. Otherwise,
* the driver decides which one.
*/
g_properties[PROP_BUS_ID] = g_param_spec_string ("bus-id",
"Bus ID", "DRM bus ID", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT);
/**
* kmssink:connector-id:
*
* A GPU has several output connectors, for example: LVDS, VGA,
* HDMI, etc. By default the first LVDS is tried, then the first
* eDP, and at the end, the first connected one.
*/
g_properties[PROP_CONNECTOR_ID] = g_param_spec_int ("connector-id",
"Connector ID", "DRM connector id", -1, G_MAXINT32, -1,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT);
/**
* kmssink:plane-id:
*
* There could be several planes associated with a CRTC.
* By default the first plane that's possible to use with a given
* CRTC is tried.
*/
g_properties[PROP_PLANE_ID] = g_param_spec_int ("plane-id",
"Plane ID", "DRM plane id", -1, G_MAXINT32, -1,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT);
/**
* kmssink:force-modesetting:
*
* If the output connector is already active, the sink automatically uses an
* overlay plane. Enforce mode setting in the kms sink and output to the
* base plane to override the automatic behavior.
*/
g_properties[PROP_FORCE_MODESETTING] =
g_param_spec_boolean ("force-modesetting", "Force modesetting",
"When enabled, the sink try to configure the display mode", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT);
g_object_class_install_properties (gobject_class, PROP_N, g_properties);
}
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, GST_PLUGIN_NAME, GST_RANK_SECONDARY,
GST_TYPE_KMS_SINK))
return FALSE;
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, kms,
GST_PLUGIN_DESC, plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME,
GST_PACKAGE_ORIGIN)
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