gstreamer/sys/vaapisink/gstvaapisink.c

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/*
* gstvaapisink.c - VA-API video sink
*
* gstreamer-vaapi (C) 2010 Splitted-Desktop Systems
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* SECTION:gstvaapisink
* @short_description: A VA-API based videosink
*
* vaapisink renders video frames to a drawable (X #Window) on a local
* display using the Video Acceleration (VA) API. The element will
* create its own internal window and render into it.
*/
#include "config.h"
#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <gst/vaapi/gstvaapivideobuffer.h>
#include <gst/vaapi/gstvaapivideosink.h>
#include <gst/vaapi/gstvaapidisplay_x11.h>
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#include <gst/vaapi/gstvaapiwindow_x11.h>
#include "gstvaapisink.h"
#define GST_PLUGIN_NAME "vaapisink"
#define GST_PLUGIN_DESC "A VA-API based videosink"
GST_DEBUG_CATEGORY_STATIC(gst_debug_vaapisink);
#define GST_CAT_DEFAULT gst_debug_vaapisink
/* ElementFactory information */
static const GstElementDetails gst_vaapisink_details =
GST_ELEMENT_DETAILS(
"Video sink",
"Sink/Video",
"A VA-API based videosink",
"Gwenole Beauchesne <gbeauchesne@splitted-desktop.com>");
/* Default template */
static GstStaticPadTemplate gst_vaapisink_sink_factory =
GST_STATIC_PAD_TEMPLATE(
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS(
"video/x-vaapi-surface, "
"width = (int) [ 1, MAX ], "
"height = (int) [ 1, MAX ]; "));
static void gst_vaapisink_iface_init(GType type);
GST_BOILERPLATE_FULL(
GstVaapiSink,
gst_vaapisink,
GstVideoSink,
GST_TYPE_VIDEO_SINK,
gst_vaapisink_iface_init);
enum {
PROP_0,
PROP_DISPLAY,
PROP_FULLSCREEN
};
static GstVaapiDisplay *
gst_vaapisink_get_display(GstVaapiSink *sink);
static GstVaapiDisplay *
gst_vaapi_video_sink_do_get_display(GstVaapiVideoSink *sink)
{
return gst_vaapisink_get_display(GST_VAAPISINK(sink));
}
static void gst_vaapi_video_sink_iface_init(GstVaapiVideoSinkInterface *iface)
{
iface->get_display = gst_vaapi_video_sink_do_get_display;
}
static void gst_vaapisink_iface_init(GType type)
{
const GType g_define_type_id = type;
G_IMPLEMENT_INTERFACE(GST_VAAPI_TYPE_VIDEO_SINK,
gst_vaapi_video_sink_iface_init);
}
static void
gst_vaapisink_destroy(GstVaapiSink *sink)
{
if (sink->display) {
g_object_unref(sink->display);
sink->display = NULL;
}
if (sink->display_name) {
g_free(sink->display_name);
sink->display_name = NULL;
}
}
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static inline gboolean
gst_vaapisink_ensure_display(GstVaapiSink *sink)
{
if (!sink->display) {
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sink->display = gst_vaapi_display_x11_new(sink->display_name);
if (!sink->display || !gst_vaapi_display_get_display(sink->display))
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return FALSE;
}
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return sink->display != NULL;
}
static gboolean
gst_vaapisink_start(GstBaseSink *base_sink)
{
GstVaapiSink * const sink = GST_VAAPISINK(base_sink);
if (!gst_vaapisink_ensure_display(sink))
return FALSE;
return TRUE;
}
static gboolean
gst_vaapisink_stop(GstBaseSink *base_sink)
{
GstVaapiSink * const sink = GST_VAAPISINK(base_sink);
if (sink->window) {
g_object_unref(sink->window);
sink->window = NULL;
}
if (sink->display) {
g_object_unref(sink->display);
sink->display = NULL;
}
return TRUE;
}
static gboolean
gst_vaapisink_set_caps(GstBaseSink *base_sink, GstCaps *caps)
{
GstVaapiSink * const sink = GST_VAAPISINK(base_sink);
GstStructure * const structure = gst_caps_get_structure(caps, 0);
GstVaapiRectangle * const win_rect = &sink->window_rect;
guint num, den;
guint win_width, win_height;
guint display_width, display_height, display_par_n, display_par_d;
gint video_width, video_height, video_par_n = 1, video_par_d = 1;
gdouble win_ratio;
if (!structure)
return FALSE;
if (!gst_structure_get_int(structure, "width", &video_width))
return FALSE;
if (!gst_structure_get_int(structure, "height", &video_height))
return FALSE;
gst_video_parse_caps_pixel_aspect_ratio(caps, &video_par_n, &video_par_d);
gst_vaapi_display_get_size(sink->display, &display_width, &display_height);
gst_vaapi_display_get_pixel_aspect_ratio(
sink->display,
&display_par_n, &display_par_d
);
if (!gst_video_calculate_display_ratio(&num, &den,
video_width, video_height,
video_par_n, video_par_d,
display_par_n, display_par_d))
return FALSE;
GST_DEBUG("video size %dx%d, calculated display ratio %d/%d",
video_width, video_height, num, den);
if ((video_height % den) == 0) {
GST_DEBUG("keeping video height");
win_width = gst_util_uint64_scale_int(video_height, num, den);
win_height = video_height;
}
else if ((video_width % num) == 0) {
GST_DEBUG("keeping video width");
win_width = video_width;
win_height = gst_util_uint64_scale_int(video_width, den, num);
}
else {
GST_DEBUG("approximating while keeping video height");
win_width = gst_util_uint64_scale_int (video_height, num, den);
win_height = video_height;
}
win_ratio = (gdouble)win_width / win_height;
GST_DEBUG("scaling to %ux%u", win_width, win_height);
if (sink->fullscreen ||
win_width > display_width || win_height > display_height) {
if (video_width > video_height) {
win_width = display_width;
win_height = display_width / win_ratio;
}
else {
win_width = display_height * win_ratio;
win_height = display_height;
}
}
GST_DEBUG("window size %ux%u", win_width, win_height);
if (sink->fullscreen) {
win_rect->x = (display_width - win_width) / 2;
win_rect->y = (display_height - win_height) / 2;
}
else {
win_rect->x = 0;
win_rect->y = 0;
}
win_rect->width = win_width;
win_rect->height = win_height;
if (sink->window)
gst_vaapi_window_set_size(sink->window, win_width, win_height);
else {
sink->window = gst_vaapi_window_x11_new(
sink->display,
win_width, win_height
);
if (!sink->window)
return FALSE;
gst_vaapi_window_set_fullscreen(sink->window, sink->fullscreen);
gst_vaapi_window_show(sink->window);
}
return TRUE;
}
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static GstFlowReturn
gst_vaapisink_show_frame(GstBaseSink *base_sink, GstBuffer *buffer)
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{
GstVaapiSink * const sink = GST_VAAPISINK(base_sink);
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GstVaapiVideoBuffer * const vbuffer = GST_VAAPI_VIDEO_BUFFER(buffer);
GstVaapiSurface *surface;
guint flags;
if (!sink->window)
return GST_FLOW_UNEXPECTED;
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surface = gst_vaapi_video_buffer_get_surface(vbuffer);
if (!surface)
return GST_FLOW_UNEXPECTED;
flags = GST_VAAPI_PICTURE_STRUCTURE_FRAME;
if (!gst_vaapi_window_put_surface(sink->window, surface, NULL,
&sink->window_rect, flags))
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return GST_FLOW_UNEXPECTED;
return GST_FLOW_OK;
}
static void
gst_vaapisink_finalize(GObject *object)
{
gst_vaapisink_destroy(GST_VAAPISINK(object));
G_OBJECT_CLASS(parent_class)->finalize(object);
}
static void
gst_vaapisink_set_property(
GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec
)
{
GstVaapiSink * const sink = GST_VAAPISINK(object);
switch (prop_id) {
case PROP_DISPLAY:
g_free(sink->display_name);
sink->display_name = g_strdup(g_value_get_string(value));
break;
case PROP_FULLSCREEN:
sink->fullscreen = g_value_get_boolean(value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
gst_vaapisink_get_property(
GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec
)
{
GstVaapiSink * const sink = GST_VAAPISINK(object);
switch (prop_id) {
case PROP_DISPLAY:
g_value_set_string(value, sink->display_name);
break;
case PROP_FULLSCREEN:
g_value_set_boolean(value, sink->fullscreen);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void gst_vaapisink_base_init(gpointer klass)
{
GstElementClass * const element_class = GST_ELEMENT_CLASS(klass);
gst_element_class_set_details(element_class, &gst_vaapisink_details);
gst_element_class_add_pad_template(
element_class,
gst_static_pad_template_get(&gst_vaapisink_sink_factory)
);
}
static void gst_vaapisink_class_init(GstVaapiSinkClass *klass)
{
GObjectClass * const object_class = G_OBJECT_CLASS(klass);
GstBaseSinkClass * const basesink_class = GST_BASE_SINK_CLASS(klass);
object_class->finalize = gst_vaapisink_finalize;
object_class->set_property = gst_vaapisink_set_property;
object_class->get_property = gst_vaapisink_get_property;
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basesink_class->start = gst_vaapisink_start;
basesink_class->stop = gst_vaapisink_stop;
basesink_class->set_caps = gst_vaapisink_set_caps;
basesink_class->preroll = gst_vaapisink_show_frame;
basesink_class->render = gst_vaapisink_show_frame;
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g_object_class_install_property
(object_class,
PROP_DISPLAY,
g_param_spec_string("display",
"X11 display name",
"X11 display name",
"",
G_PARAM_READWRITE));
g_object_class_install_property
(object_class,
PROP_FULLSCREEN,
g_param_spec_boolean("fullscreen",
"Fullscreen",
"Requests window in fullscreen state",
FALSE,
G_PARAM_READWRITE));
}
static void gst_vaapisink_init(GstVaapiSink *sink, GstVaapiSinkClass *klass)
{
sink->display_name = NULL;
sink->display = NULL;
sink->fullscreen = FALSE;
}
GstVaapiDisplay *
gst_vaapisink_get_display(GstVaapiSink *sink)
{
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if (!gst_vaapisink_ensure_display(sink))
return NULL;
return sink->display;
}
static gboolean plugin_init(GstPlugin *plugin)
{
GST_DEBUG_CATEGORY_INIT(gst_debug_vaapisink,
GST_PLUGIN_NAME, 0, GST_PLUGIN_DESC);
return gst_element_register(plugin,
GST_PLUGIN_NAME,
GST_RANK_PRIMARY,
GST_TYPE_VAAPISINK);
}
GST_PLUGIN_DEFINE(
GST_VERSION_MAJOR, GST_VERSION_MINOR,
GST_PLUGIN_NAME,
GST_PLUGIN_DESC,
plugin_init,
PACKAGE_VERSION,
"GPL",
PACKAGE,
PACKAGE_BUGREPORT);