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gstreamer/gst-libs/gst/vaapi/gstvaapicontext.c
Sreerenj Balachandran 51151e7aa1 Add initial support for GStreamer 1.0. 
This integrates support for GStreamer API >= 1.0 only in the libgstvaapi
core decoding library. The changes are kept rather minimal here so that
the library retains as little dependency as possible on core GStreamer
functionality.

Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
2013-04-10 14:58:16 +02:00

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/*
* gstvaapicontext.c - VA context abstraction
*
* Copyright (C) 2010-2011 Splitted-Desktop Systems
* Copyright (C) 2011-2013 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
/**
* SECTION:gstvaapicontext
* @short_description: VA context abstraction
*/
#include "sysdeps.h"
#include <assert.h>
#include "gstvaapicompat.h"
#include "gstvaapicontext.h"
#include "gstvaapisurface.h"
#include "gstvaapisurface_priv.h"
#include "gstvaapisurfacepool.h"
#include "gstvaapisurfaceproxy.h"
#include "gstvaapiimage.h"
#include "gstvaapisubpicture.h"
#include "gstvaapiminiobject.h"
#include "gstvaapiutils.h"
#include "gstvaapi_priv.h"
#define DEBUG 1
#include "gstvaapidebug.h"
G_DEFINE_TYPE(GstVaapiContext, gst_vaapi_context, GST_VAAPI_TYPE_OBJECT)
#define GST_VAAPI_CONTEXT_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE((obj), \
GST_VAAPI_TYPE_CONTEXT, \
GstVaapiContextPrivate))
typedef struct _GstVaapiOverlayRectangle GstVaapiOverlayRectangle;
struct _GstVaapiOverlayRectangle {
GstVaapiContext *context;
GstVaapiSubpicture *subpicture;
GstVaapiRectangle render_rect;
guint seq_num;
guint layer_id;
GstBuffer *rect_buffer;
GstVideoOverlayRectangle *rect;
guint is_associated : 1;
};
/* XXX: optimize for the effective number of reference frames */
struct _GstVaapiContextPrivate {
VAConfigID config_id;
GPtrArray *surfaces;
GstVaapiVideoPool *surfaces_pool;
GPtrArray *overlays[2];
guint overlay_id;
GstVaapiProfile profile;
GstVaapiEntrypoint entrypoint;
guint width;
guint height;
guint ref_frames;
guint is_constructed : 1;
};
enum {
PROP_0,
PROP_PROFILE,
PROP_ENTRYPOINT,
PROP_WIDTH,
PROP_HEIGHT,
PROP_REF_FRAMES
};
static guint
get_max_ref_frames(GstVaapiProfile profile)
{
guint ref_frames;
switch (gst_vaapi_profile_get_codec(profile)) {
case GST_VAAPI_CODEC_H264: ref_frames = 16; break;
case GST_VAAPI_CODEC_JPEG: ref_frames = 0; break;
default: ref_frames = 2; break;
}
return ref_frames;
}
static inline void
gst_video_overlay_rectangle_replace(GstVideoOverlayRectangle **old_rect_ptr,
GstVideoOverlayRectangle *new_rect)
{
gst_mini_object_replace((GstMiniObject **)old_rect_ptr,
GST_MINI_OBJECT_CAST(new_rect));
}
#define overlay_rectangle_ref(overlay) \
gst_vaapi_mini_object_ref(GST_VAAPI_MINI_OBJECT(overlay))
#define overlay_rectangle_unref(overlay) \
gst_vaapi_mini_object_unref(GST_VAAPI_MINI_OBJECT(overlay))
#define overlay_rectangle_replace(old_overlay_ptr, new_overlay) \
gst_vaapi_mini_object_replace((GstVaapiMiniObject **)(old_overlay_ptr), \
(GstVaapiMiniObject *)(new_overlay))
static void
overlay_rectangle_finalize(GstVaapiOverlayRectangle *overlay);
static gboolean
overlay_rectangle_associate(GstVaapiOverlayRectangle *overlay);
static gboolean
overlay_rectangle_deassociate(GstVaapiOverlayRectangle *overlay);
static inline const GstVaapiMiniObjectClass *
overlay_rectangle_class(void)
{
static const GstVaapiMiniObjectClass GstVaapiOverlayRectangleClass = {
sizeof(GstVaapiOverlayRectangle),
(GDestroyNotify)overlay_rectangle_finalize
};
return &GstVaapiOverlayRectangleClass;
}
static GstVaapiOverlayRectangle *
overlay_rectangle_new(GstVideoOverlayRectangle *rect, GstVaapiContext *context,
guint layer_id)
{
GstVaapiOverlayRectangle *overlay;
GstVaapiRectangle *render_rect;
guint width, height, flags;
gint x, y;
overlay = (GstVaapiOverlayRectangle *)
gst_vaapi_mini_object_new0(overlay_rectangle_class());
if (!overlay)
return NULL;
overlay->context = context;
overlay->seq_num = gst_video_overlay_rectangle_get_seqnum(rect);
overlay->layer_id = layer_id;
overlay->rect = gst_video_overlay_rectangle_ref(rect);
flags = gst_video_overlay_rectangle_get_flags(rect);
gst_buffer_replace(&overlay->rect_buffer,
gst_video_overlay_rectangle_get_pixels_unscaled_raw(rect, flags));
if (!overlay->rect_buffer)
goto error;
overlay->subpicture = gst_vaapi_subpicture_new_from_overlay_rectangle(
GST_VAAPI_OBJECT_DISPLAY(context), rect);
if (!overlay->subpicture)
goto error;
gst_video_overlay_rectangle_get_render_rectangle(rect,
&x, &y, &width, &height);
render_rect = &overlay->render_rect;
render_rect->x = x;
render_rect->y = y;
render_rect->width = width;
render_rect->height = height;
return overlay;
error:
overlay_rectangle_unref(overlay);
return NULL;
}
static void
overlay_rectangle_finalize(GstVaapiOverlayRectangle *overlay)
{
gst_buffer_replace(&overlay->rect_buffer, NULL);
gst_video_overlay_rectangle_unref(overlay->rect);
if (overlay->subpicture) {
overlay_rectangle_deassociate(overlay);
g_object_unref(overlay->subpicture);
overlay->subpicture = NULL;
}
}
static gboolean
overlay_rectangle_associate(GstVaapiOverlayRectangle *overlay)
{
GstVaapiSubpicture * const subpicture = overlay->subpicture;
GPtrArray * const surfaces = overlay->context->priv->surfaces;
guint i, n_associated;
if (overlay->is_associated)
return TRUE;
n_associated = 0;
for (i = 0; i < surfaces->len; i++) {
GstVaapiSurface * const surface = g_ptr_array_index(surfaces, i);
if (gst_vaapi_surface_associate_subpicture(surface, subpicture,
NULL, &overlay->render_rect))
n_associated++;
}
overlay->is_associated = TRUE;
return n_associated == surfaces->len;
}
static gboolean
overlay_rectangle_deassociate(GstVaapiOverlayRectangle *overlay)
{
GstVaapiSubpicture * const subpicture = overlay->subpicture;
GPtrArray * const surfaces = overlay->context->priv->surfaces;
guint i, n_associated;
if (!overlay->is_associated)
return TRUE;
n_associated = surfaces->len;
for (i = 0; i < surfaces->len; i++) {
GstVaapiSurface * const surface = g_ptr_array_index(surfaces, i);
if (gst_vaapi_surface_deassociate_subpicture(surface, subpicture))
n_associated--;
}
overlay->is_associated = FALSE;
return n_associated == 0;
}
static gboolean
overlay_rectangle_changed_pixels(GstVaapiOverlayRectangle *overlay,
GstVideoOverlayRectangle *rect)
{
guint flags;
GstBuffer *buffer;
if (overlay->seq_num == gst_video_overlay_rectangle_get_seqnum(rect))
return FALSE;
flags = to_GstVideoOverlayFormatFlags(
gst_vaapi_subpicture_get_flags(overlay->subpicture));
buffer = gst_video_overlay_rectangle_get_pixels_unscaled_raw(rect, flags);
if (!buffer)
return FALSE;
#if GST_CHECK_VERSION(1,0,0)
{
const guint n_blocks = gst_buffer_n_memory(buffer);
gsize ofs;
guint i;
if (buffer == overlay->rect_buffer)
return TRUE;
if (n_blocks != gst_buffer_n_memory(overlay->rect_buffer))
return FALSE;
for (i = 0; i < n_blocks; i++) {
GstMemory * const mem1 = gst_buffer_peek_memory(buffer, i);
GstMemory * const mem2 =
gst_buffer_peek_memory(overlay->rect_buffer, i);
if (!gst_memory_is_span(mem1, mem2, &ofs))
return FALSE;
}
}
#else
if (GST_BUFFER_DATA(overlay->rect_buffer) != GST_BUFFER_DATA(buffer))
return FALSE;
#endif
return TRUE;
}
static gboolean
overlay_rectangle_changed_render_rect(GstVaapiOverlayRectangle *overlay,
GstVideoOverlayRectangle *rect)
{
GstVaapiRectangle * const render_rect = &overlay->render_rect;
guint width, height;
gint x, y;
gst_video_overlay_rectangle_get_render_rectangle(rect,
&x, &y, &width, &height);
if (x == render_rect->x &&
y == render_rect->y &&
width == render_rect->width &&
height == render_rect->height)
return FALSE;
render_rect->x = x;
render_rect->y = y;
render_rect->width = width;
render_rect->height = height;
return TRUE;
}
static inline gboolean
overlay_rectangle_update_global_alpha(GstVaapiOverlayRectangle *overlay,
GstVideoOverlayRectangle *rect)
{
#ifdef HAVE_GST_VIDEO_OVERLAY_HWCAPS
const guint flags = gst_video_overlay_rectangle_get_flags(rect);
if (!(flags & GST_VIDEO_OVERLAY_FORMAT_FLAG_GLOBAL_ALPHA))
return TRUE;
#endif
return gst_vaapi_subpicture_set_global_alpha(overlay->subpicture,
gst_video_overlay_rectangle_get_global_alpha(rect));
}
static gboolean
overlay_rectangle_update(GstVaapiOverlayRectangle *overlay,
GstVideoOverlayRectangle *rect, gboolean *reassociate_ptr)
{
if (overlay_rectangle_changed_pixels(overlay, rect))
return FALSE;
if (overlay_rectangle_changed_render_rect(overlay, rect))
*reassociate_ptr = TRUE;
if (!overlay_rectangle_update_global_alpha(overlay, rect))
return FALSE;
gst_video_overlay_rectangle_replace(&overlay->rect, rect);
return TRUE;
}
static inline GPtrArray *
overlay_new(void)
{
return g_ptr_array_new_with_free_func(
(GDestroyNotify)gst_vaapi_mini_object_unref);
}
static void
overlay_destroy(GPtrArray **overlay_ptr)
{
GPtrArray * const overlay = *overlay_ptr;
if (!overlay)
return;
g_ptr_array_unref(overlay);
*overlay_ptr = NULL;
}
static void
overlay_clear(GPtrArray *overlay)
{
if (overlay && overlay->len > 0)
g_ptr_array_remove_range(overlay, 0, overlay->len);
}
static GstVaapiOverlayRectangle *
overlay_lookup(GPtrArray *overlays, GstVideoOverlayRectangle *rect)
{
guint i;
for (i = 0; i < overlays->len; i++) {
GstVaapiOverlayRectangle * const overlay =
g_ptr_array_index(overlays, i);
if (overlay->rect == rect)
return overlay;
}
return NULL;
}
static gboolean
overlay_reassociate(GPtrArray *overlays)
{
guint i;
for (i = 0; i < overlays->len; i++)
overlay_rectangle_deassociate(g_ptr_array_index(overlays, i));
for (i = 0; i < overlays->len; i++) {
if (!overlay_rectangle_associate(g_ptr_array_index(overlays, i)))
return FALSE;
}
return TRUE;
}
static void
gst_vaapi_context_clear_overlay(GstVaapiContext *context)
{
GstVaapiContextPrivate * const priv = context->priv;
overlay_clear(priv->overlays[0]);
overlay_clear(priv->overlays[1]);
priv->overlay_id = 0;
}
static inline void
gst_vaapi_context_destroy_overlay(GstVaapiContext *context)
{
gst_vaapi_context_clear_overlay(context);
}
static void
unref_surface_cb(gpointer data, gpointer user_data)
{
GstVaapiSurface * const surface = GST_VAAPI_SURFACE(data);
gst_vaapi_surface_set_parent_context(surface, NULL);
g_object_unref(surface);
}
static void
gst_vaapi_context_destroy_surfaces(GstVaapiContext *context)
{
GstVaapiContextPrivate * const priv = context->priv;
gst_vaapi_context_destroy_overlay(context);
if (priv->surfaces) {
g_ptr_array_foreach(priv->surfaces, unref_surface_cb, NULL);
g_ptr_array_free(priv->surfaces, TRUE);
priv->surfaces = NULL;
}
g_clear_object(&priv->surfaces_pool);
}
static void
gst_vaapi_context_destroy(GstVaapiContext *context)
{
GstVaapiDisplay * const display = GST_VAAPI_OBJECT_DISPLAY(context);
GstVaapiContextPrivate * const priv = context->priv;
VAContextID context_id;
VAStatus status;
context_id = GST_VAAPI_OBJECT_ID(context);
GST_DEBUG("context %" GST_VAAPI_ID_FORMAT, GST_VAAPI_ID_ARGS(context_id));
if (context_id != VA_INVALID_ID) {
GST_VAAPI_DISPLAY_LOCK(display);
status = vaDestroyContext(
GST_VAAPI_DISPLAY_VADISPLAY(display),
context_id
);
GST_VAAPI_DISPLAY_UNLOCK(display);
if (!vaapi_check_status(status, "vaDestroyContext()"))
g_warning("failed to destroy context %" GST_VAAPI_ID_FORMAT,
GST_VAAPI_ID_ARGS(context_id));
GST_VAAPI_OBJECT_ID(context) = VA_INVALID_ID;
}
if (priv->config_id != VA_INVALID_ID) {
GST_VAAPI_DISPLAY_LOCK(display);
status = vaDestroyConfig(
GST_VAAPI_DISPLAY_VADISPLAY(display),
priv->config_id
);
GST_VAAPI_DISPLAY_UNLOCK(display);
if (!vaapi_check_status(status, "vaDestroyConfig()"))
g_warning("failed to destroy config %" GST_VAAPI_ID_FORMAT,
GST_VAAPI_ID_ARGS(priv->config_id));
priv->config_id = VA_INVALID_ID;
}
}
static gboolean
gst_vaapi_context_create_overlay(GstVaapiContext *context)
{
GstVaapiContextPrivate * const priv = context->priv;
if (!priv->overlays[0] || !priv->overlays[1])
return FALSE;
gst_vaapi_context_clear_overlay(context);
return TRUE;
}
static gboolean
gst_vaapi_context_create_surfaces(GstVaapiContext *context)
{
GstVaapiContextPrivate * const priv = context->priv;
GstCaps *caps;
GstVaapiSurface *surface;
guint i, num_surfaces;
/* Number of scratch surfaces beyond those used as reference */
const guint SCRATCH_SURFACES_COUNT = 4;
if (!gst_vaapi_context_create_overlay(context))
return FALSE;
if (!priv->surfaces) {
priv->surfaces = g_ptr_array_new();
if (!priv->surfaces)
return FALSE;
}
if (!priv->surfaces_pool) {
caps = gst_caps_new_simple(
GST_VAAPI_SURFACE_CAPS_NAME,
"type", G_TYPE_STRING, "vaapi",
"width", G_TYPE_INT, priv->width,
"height", G_TYPE_INT, priv->height,
NULL
);
if (!caps)
return FALSE;
priv->surfaces_pool = gst_vaapi_surface_pool_new(
GST_VAAPI_OBJECT_DISPLAY(context),
caps
);
gst_caps_unref(caps);
if (!priv->surfaces_pool)
return FALSE;
}
num_surfaces = priv->ref_frames + SCRATCH_SURFACES_COUNT;
gst_vaapi_video_pool_set_capacity(priv->surfaces_pool, num_surfaces);
for (i = priv->surfaces->len; i < num_surfaces; i++) {
surface = gst_vaapi_surface_new(
GST_VAAPI_OBJECT_DISPLAY(context),
GST_VAAPI_CHROMA_TYPE_YUV420,
priv->width, priv->height
);
if (!surface)
return FALSE;
gst_vaapi_surface_set_parent_context(surface, context);
g_ptr_array_add(priv->surfaces, surface);
if (!gst_vaapi_video_pool_add_object(priv->surfaces_pool, surface))
return FALSE;
}
return TRUE;
}
static gboolean
gst_vaapi_context_create(GstVaapiContext *context)
{
GstVaapiDisplay * const display = GST_VAAPI_OBJECT_DISPLAY(context);
GstVaapiContextPrivate * const priv = context->priv;
VAProfile va_profile;
VAEntrypoint va_entrypoint;
VAConfigAttrib attrib;
VAContextID context_id;
VASurfaceID surface_id;
VAStatus status;
GArray *surfaces = NULL;
gboolean success = FALSE;
guint i;
if (!priv->surfaces && !gst_vaapi_context_create_surfaces(context))
goto end;
surfaces = g_array_sized_new(
FALSE,
FALSE,
sizeof(VASurfaceID),
priv->surfaces->len
);
if (!surfaces)
goto end;
for (i = 0; i < priv->surfaces->len; i++) {
GstVaapiSurface * const surface = g_ptr_array_index(priv->surfaces, i);
if (!surface)
goto end;
surface_id = GST_VAAPI_OBJECT_ID(surface);
g_array_append_val(surfaces, surface_id);
}
assert(surfaces->len == priv->surfaces->len);
if (!priv->profile || !priv->entrypoint)
goto end;
va_profile = gst_vaapi_profile_get_va_profile(priv->profile);
va_entrypoint = gst_vaapi_entrypoint_get_va_entrypoint(priv->entrypoint);
GST_VAAPI_DISPLAY_LOCK(display);
attrib.type = VAConfigAttribRTFormat;
status = vaGetConfigAttributes(
GST_VAAPI_DISPLAY_VADISPLAY(display),
va_profile,
va_entrypoint,
&attrib, 1
);
GST_VAAPI_DISPLAY_UNLOCK(display);
if (!vaapi_check_status(status, "vaGetConfigAttributes()"))
goto end;
if (!(attrib.value & VA_RT_FORMAT_YUV420))
goto end;
GST_VAAPI_DISPLAY_LOCK(display);
status = vaCreateConfig(
GST_VAAPI_DISPLAY_VADISPLAY(display),
va_profile,
va_entrypoint,
&attrib, 1,
&priv->config_id
);
GST_VAAPI_DISPLAY_UNLOCK(display);
if (!vaapi_check_status(status, "vaCreateConfig()"))
goto end;
GST_VAAPI_DISPLAY_LOCK(display);
status = vaCreateContext(
GST_VAAPI_DISPLAY_VADISPLAY(display),
priv->config_id,
priv->width, priv->height,
VA_PROGRESSIVE,
(VASurfaceID *)surfaces->data, surfaces->len,
&context_id
);
GST_VAAPI_DISPLAY_UNLOCK(display);
if (!vaapi_check_status(status, "vaCreateContext()"))
goto end;
GST_DEBUG("context %" GST_VAAPI_ID_FORMAT, GST_VAAPI_ID_ARGS(context_id));
GST_VAAPI_OBJECT_ID(context) = context_id;
success = TRUE;
end:
if (surfaces)
g_array_free(surfaces, TRUE);
return success;
}
static void
gst_vaapi_context_finalize(GObject *object)
{
GstVaapiContext * const context = GST_VAAPI_CONTEXT(object);
GstVaapiContextPrivate * const priv = context->priv;
overlay_destroy(&priv->overlays[0]);
overlay_destroy(&priv->overlays[1]);
gst_vaapi_context_destroy(context);
gst_vaapi_context_destroy_surfaces(context);
G_OBJECT_CLASS(gst_vaapi_context_parent_class)->finalize(object);
}
static void
gst_vaapi_context_set_property(
GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec
)
{
GstVaapiContext * const context = GST_VAAPI_CONTEXT(object);
GstVaapiContextPrivate * const priv = context->priv;
switch (prop_id) {
case PROP_PROFILE:
gst_vaapi_context_set_profile(context, g_value_get_uint(value));
break;
case PROP_ENTRYPOINT:
priv->entrypoint = g_value_get_uint(value);
break;
case PROP_WIDTH:
priv->width = g_value_get_uint(value);
break;
case PROP_HEIGHT:
priv->height = g_value_get_uint(value);
break;
case PROP_REF_FRAMES:
priv->ref_frames = g_value_get_uint(value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
gst_vaapi_context_get_property(
GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec
)
{
GstVaapiContext * const context = GST_VAAPI_CONTEXT(object);
GstVaapiContextPrivate * const priv = context->priv;
switch (prop_id) {
case PROP_PROFILE:
g_value_set_uint(value, gst_vaapi_context_get_profile(context));
break;
case PROP_ENTRYPOINT:
g_value_set_uint(value, gst_vaapi_context_get_entrypoint(context));
break;
case PROP_WIDTH:
g_value_set_uint(value, priv->width);
break;
case PROP_HEIGHT:
g_value_set_uint(value, priv->height);
break;
case PROP_REF_FRAMES:
g_value_set_uint(value, priv->ref_frames);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
gst_vaapi_context_class_init(GstVaapiContextClass *klass)
{
GObjectClass * const object_class = G_OBJECT_CLASS(klass);
g_type_class_add_private(klass, sizeof(GstVaapiContextPrivate));
object_class->finalize = gst_vaapi_context_finalize;
object_class->set_property = gst_vaapi_context_set_property;
object_class->get_property = gst_vaapi_context_get_property;
g_object_class_install_property
(object_class,
PROP_PROFILE,
g_param_spec_uint("profile",
"Profile",
"The profile used for decoding",
0, G_MAXUINT32, 0,
G_PARAM_READWRITE));
g_object_class_install_property
(object_class,
PROP_ENTRYPOINT,
g_param_spec_uint("entrypoint",
"Entrypoint",
"The decoder entrypoint",
0, G_MAXUINT32, 0,
G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property
(object_class,
PROP_WIDTH,
g_param_spec_uint("width",
"Width",
"The width of decoded surfaces",
0, G_MAXINT32, 0,
G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property
(object_class,
PROP_HEIGHT,
g_param_spec_uint("height",
"Height",
"The height of the decoded surfaces",
0, G_MAXINT32, 0,
G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property
(object_class,
PROP_REF_FRAMES,
g_param_spec_uint("ref-frames",
"Reference Frames",
"The number of reference frames",
0, G_MAXINT32, 0,
G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
}
static void
gst_vaapi_context_init(GstVaapiContext *context)
{
GstVaapiContextPrivate *priv = GST_VAAPI_CONTEXT_GET_PRIVATE(context);
context->priv = priv;
priv->config_id = VA_INVALID_ID;
priv->surfaces = NULL;
priv->surfaces_pool = NULL;
priv->overlays[0] = overlay_new();
priv->overlays[1] = overlay_new();
priv->profile = 0;
priv->entrypoint = 0;
priv->width = 0;
priv->height = 0;
priv->ref_frames = 0;
}
/**
* gst_vaapi_context_new:
* @display: a #GstVaapiDisplay
* @profile: a #GstVaapiProfile
* @entrypoint: a #GstVaapiEntrypoint
* @width: coded width from the bitstream
* @height: coded height from the bitstream
*
* Creates a new #GstVaapiContext with the specified codec @profile
* and @entrypoint.
*
* Return value: the newly allocated #GstVaapiContext object
*/
GstVaapiContext *
gst_vaapi_context_new(
GstVaapiDisplay *display,
GstVaapiProfile profile,
GstVaapiEntrypoint entrypoint,
guint width,
guint height
)
{
GstVaapiContextInfo info;
info.profile = profile;
info.entrypoint = entrypoint;
info.width = width;
info.height = height;
info.ref_frames = get_max_ref_frames(profile);
return gst_vaapi_context_new_full(display, &info);
}
/**
* gst_vaapi_context_new_full:
* @display: a #GstVaapiDisplay
* @cip: a pointer to the #GstVaapiContextInfo
*
* Creates a new #GstVaapiContext with the configuration specified by
* @cip, thus including profile, entry-point, encoded size and maximum
* number of reference frames reported by the bitstream.
*
* Return value: the newly allocated #GstVaapiContext object
*/
GstVaapiContext *
gst_vaapi_context_new_full(GstVaapiDisplay *display, GstVaapiContextInfo *cip)
{
GstVaapiContext *context;
g_return_val_if_fail(GST_VAAPI_IS_DISPLAY(display), NULL);
g_return_val_if_fail(cip->profile, NULL);
g_return_val_if_fail(cip->entrypoint, NULL);
g_return_val_if_fail(cip->width > 0, NULL);
g_return_val_if_fail(cip->height > 0, NULL);
context = g_object_new(
GST_VAAPI_TYPE_CONTEXT,
"display", display,
"id", GST_VAAPI_ID(VA_INVALID_ID),
"profile", cip->profile,
"entrypoint", cip->entrypoint,
"width", cip->width,
"height", cip->height,
"ref-frames", cip->ref_frames,
NULL
);
if (!context->priv->is_constructed) {
g_object_unref(context);
return NULL;
}
return context;
}
/**
* gst_vaapi_context_reset:
* @context: a #GstVaapiContext
* @profile: a #GstVaapiProfile
* @entrypoint: a #GstVaapiEntrypoint
* @width: coded width from the bitstream
* @height: coded height from the bitstream
*
* Resets @context to the specified codec @profile and @entrypoint.
* The surfaces will be reallocated if the coded size changed.
*
* Return value: %TRUE on success
*/
gboolean
gst_vaapi_context_reset(
GstVaapiContext *context,
GstVaapiProfile profile,
GstVaapiEntrypoint entrypoint,
unsigned int width,
unsigned int height
)
{
GstVaapiContextPrivate * const priv = context->priv;
GstVaapiContextInfo info;
info.profile = profile;
info.entrypoint = entrypoint;
info.width = width;
info.height = height;
info.ref_frames = priv->ref_frames;
return gst_vaapi_context_reset_full(context, &info);
}
/**
* gst_vaapi_context_reset_full:
* @context: a #GstVaapiContext
* @cip: a pointer to the new #GstVaapiContextInfo details
*
* Resets @context to the configuration specified by @cip, thus
* including profile, entry-point, encoded size and maximum number of
* reference frames reported by the bitstream.
*
* Return value: %TRUE on success
*/
gboolean
gst_vaapi_context_reset_full(GstVaapiContext *context, GstVaapiContextInfo *cip)
{
GstVaapiContextPrivate * const priv = context->priv;
gboolean size_changed, codec_changed;
size_changed = priv->width != cip->width || priv->height != cip->height;
if (size_changed) {
gst_vaapi_context_destroy_surfaces(context);
priv->width = cip->width;
priv->height = cip->height;
}
codec_changed = priv->profile != cip->profile || priv->entrypoint != cip->entrypoint;
if (codec_changed) {
gst_vaapi_context_destroy(context);
priv->profile = cip->profile;
priv->entrypoint = cip->entrypoint;
}
if (size_changed && !gst_vaapi_context_create_surfaces(context))
return FALSE;
if (codec_changed && !gst_vaapi_context_create(context))
return FALSE;
priv->is_constructed = TRUE;
return TRUE;
}
/**
* gst_vaapi_context_get_id:
* @context: a #GstVaapiContext
*
* Returns the underlying VAContextID of the @context.
*
* Return value: the underlying VA context id
*/
GstVaapiID
gst_vaapi_context_get_id(GstVaapiContext *context)
{
g_return_val_if_fail(GST_VAAPI_IS_CONTEXT(context), VA_INVALID_ID);
return GST_VAAPI_OBJECT_ID(context);
}
/**
* gst_vaapi_context_get_profile:
* @context: a #GstVaapiContext
*
* Returns the VA profile used by the @context.
*
* Return value: the VA profile used by the @context
*/
GstVaapiProfile
gst_vaapi_context_get_profile(GstVaapiContext *context)
{
g_return_val_if_fail(GST_VAAPI_IS_CONTEXT(context), 0);
return context->priv->profile;
}
/**
* gst_vaapi_context_set_profile:
* @context: a #GstVaapiContext
* @profile: the new #GstVaapiProfile to use
*
* Sets the new @profile to use with the @context. If @profile matches
* the previous profile, this call has no effect. Otherwise, the
* underlying VA context is recreated, while keeping the previously
* allocated surfaces.
*
* Return value: %TRUE on success
*/
gboolean
gst_vaapi_context_set_profile(GstVaapiContext *context, GstVaapiProfile profile)
{
g_return_val_if_fail(GST_VAAPI_IS_CONTEXT(context), FALSE);
g_return_val_if_fail(profile, FALSE);
return gst_vaapi_context_reset(context,
profile,
context->priv->entrypoint,
context->priv->width,
context->priv->height);
}
/**
* gst_vaapi_context_get_entrypoint:
* @context: a #GstVaapiContext
*
* Returns the VA entrypoint used by the @context
*
* Return value: the VA entrypoint used by the @context
*/
GstVaapiEntrypoint
gst_vaapi_context_get_entrypoint(GstVaapiContext *context)
{
g_return_val_if_fail(GST_VAAPI_IS_CONTEXT(context), 0);
return context->priv->entrypoint;
}
/**
* gst_vaapi_context_get_size:
* @context: a #GstVaapiContext
* @pwidth: return location for the width, or %NULL
* @pheight: return location for the height, or %NULL
*
* Retrieves the size of the surfaces attached to @context.
*/
void
gst_vaapi_context_get_size(
GstVaapiContext *context,
guint *pwidth,
guint *pheight
)
{
g_return_if_fail(GST_VAAPI_IS_CONTEXT(context));
if (pwidth)
*pwidth = context->priv->width;
if (pheight)
*pheight = context->priv->height;
}
/**
* gst_vaapi_context_get_surface_proxy:
* @context: a #GstVaapiContext
*
* Acquires a free surface, wrapped into a #GstVaapiSurfaceProxy. The
* returned surface will be automatically released when the proxy is
* destroyed. So, it is enough to call gst_vaapi_surface_proxy_unref()
* after usage.
*
* This function returns %NULL if there is no free surface available
* in the pool. The surfaces are pre-allocated during context creation
* though.
*
* Return value: a free surface, or %NULL if none is available
*/
GstVaapiSurfaceProxy *
gst_vaapi_context_get_surface_proxy(GstVaapiContext *context)
{
g_return_val_if_fail(GST_VAAPI_IS_CONTEXT(context), NULL);
return gst_vaapi_surface_proxy_new_from_pool(
GST_VAAPI_SURFACE_POOL(context->priv->surfaces_pool));
}
/**
* gst_vaapi_context_get_surface_count:
* @context: a #GstVaapiContext
*
* Retrieves the number of free surfaces left in the pool.
*
* Return value: the number of free surfaces available in the pool
*/
guint
gst_vaapi_context_get_surface_count(GstVaapiContext *context)
{
g_return_val_if_fail(GST_VAAPI_IS_CONTEXT(context), 0);
return gst_vaapi_video_pool_get_size(context->priv->surfaces_pool);
}
/**
* gst_vaapi_context_apply_composition:
* @context: a #GstVaapiContext
* @composition: a #GstVideoOverlayComposition
*
* Applies video composition planes to all surfaces bound to @context.
* This helper function resets any additional subpictures the user may
* have associated himself. A %NULL @composition will also clear all
* the existing subpictures.
*
* Return value: %TRUE if all composition planes could be applied,
* %FALSE otherwise
*/
gboolean
gst_vaapi_context_apply_composition(
GstVaapiContext *context,
GstVideoOverlayComposition *composition
)
{
GstVaapiContextPrivate *priv;
GPtrArray *curr_overlay, *next_overlay;
guint i, n_rectangles;
gboolean reassociate = FALSE;
g_return_val_if_fail(GST_VAAPI_IS_CONTEXT(context), FALSE);
priv = context->priv;
if (!priv->surfaces)
return FALSE;
if (!composition) {
gst_vaapi_context_clear_overlay(context);
return TRUE;
}
curr_overlay = priv->overlays[priv->overlay_id];
next_overlay = priv->overlays[priv->overlay_id ^ 1];
overlay_clear(next_overlay);
n_rectangles = gst_video_overlay_composition_n_rectangles(composition);
for (i = 0; i < n_rectangles; i++) {
GstVideoOverlayRectangle * const rect =
gst_video_overlay_composition_get_rectangle(composition, i);
GstVaapiOverlayRectangle *overlay;
overlay = overlay_lookup(curr_overlay, rect);
if (overlay && overlay_rectangle_update(overlay, rect, &reassociate)) {
overlay_rectangle_ref(overlay);
if (overlay->layer_id != i)
reassociate = TRUE;
}
else {
overlay = overlay_rectangle_new(rect, context, i);
if (!overlay) {
GST_WARNING("could not create VA overlay rectangle");
goto error;
}
reassociate = TRUE;
}
g_ptr_array_add(next_overlay, overlay);
}
overlay_clear(curr_overlay);
priv->overlay_id ^= 1;
if (reassociate && !overlay_reassociate(next_overlay))
return FALSE;
return TRUE;
error:
gst_vaapi_context_clear_overlay(context);
return FALSE;
}
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