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gstreamer/gst-libs/gst/vaapi/gstvaapicontext.c

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/*
* gstvaapicontext.c - VA context abstraction
*
* gstreamer-vaapi (C) 2010 Splitted-Desktop Systems
*
* 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 "config.h"
#include <assert.h>
#include "gstvaapicompat.h"
#include "gstvaapicontext.h"
#include "gstvaapisurfacepool.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))
/* XXX: optimize for the effective number of reference frames */
struct _GstVaapiContextPrivate {
VAConfigID config_id;
GPtrArray *surfaces;
GstVaapiVideoPool *surfaces_pool;
GstVaapiProfile profile;
GstVaapiEntrypoint entrypoint;
guint width;
guint height;
guint is_constructed : 1;
};
enum {
PROP_0,
PROP_PROFILE,
PROP_ENTRYPOINT,
PROP_WIDTH,
PROP_HEIGHT
};
static void
unref_surface_cb(gpointer data, gpointer user_data)
{
g_object_unref(GST_VAAPI_SURFACE(data));
}
static void
gst_vaapi_context_destroy_surfaces(GstVaapiContext *context)
{
GstVaapiContextPrivate * const priv = context->priv;
if (priv->surfaces) {
g_ptr_array_foreach(priv->surfaces, unref_surface_cb, NULL);
g_ptr_array_free(priv->surfaces, TRUE);
priv->surfaces = NULL;
}
if (priv->surfaces_pool) {
g_object_unref(priv->surfaces_pool);
priv->surfaces_pool = NULL;
}
}
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_surfaces(GstVaapiContext *context)
{
GstVaapiContextPrivate * const priv = context->priv;
GstCaps *caps;
GstVaapiSurface *surface;
guint i, num_ref_frames, num_surfaces;
/* Number of scratch surfaces beyond those used as reference */
const guint SCRATCH_SURFACES_COUNT = 4;
if (!priv->surfaces) {
priv->surfaces = g_ptr_array_new();
if (!priv->surfaces)
return FALSE;
}
if (!priv->surfaces_pool) {
caps = gst_caps_new_simple(
"video/x-vaapi-surface",
"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_ref_frames = 2;
if (gst_vaapi_profile_get_codec(priv->profile) == GST_VAAPI_CODEC_H264)
num_ref_frames = 16;
num_surfaces = num_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;
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);
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;
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;
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));
}
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->profile = 0;
priv->entrypoint = 0;
priv->width = 0;
priv->height = 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,
unsigned int width,
unsigned int height
)
{
GstVaapiContext *context;
g_return_val_if_fail(GST_VAAPI_IS_DISPLAY(display), NULL);
g_return_val_if_fail(profile, NULL);
g_return_val_if_fail(entrypoint, NULL);
g_return_val_if_fail(width > 0, NULL);
g_return_val_if_fail(height > 0, NULL);
context = g_object_new(
GST_VAAPI_TYPE_CONTEXT,
"display", display,
"id", GST_VAAPI_ID(VA_INVALID_ID),
"profile", profile,
"entrypoint", entrypoint,
"width", width,
"height", height,
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;
gboolean size_changed, codec_changed;
size_changed = priv->width != width || priv->height != height;
if (size_changed) {
gst_vaapi_context_destroy_surfaces(context);
priv->width = width;
priv->height = height;
}
codec_changed = priv->profile != profile || priv->entrypoint != entrypoint;
if (codec_changed) {
gst_vaapi_context_destroy(context);
priv->profile = profile;
priv->entrypoint = 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:
* @context: a #GstVaapiContext
*
* Acquires a free surface. The returned surface but be released with
* gst_vaapi_context_put_surface(). 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
*/
GstVaapiSurface *
gst_vaapi_context_get_surface(GstVaapiContext *context)
{
g_return_val_if_fail(GST_VAAPI_IS_CONTEXT(context), NULL);
return gst_vaapi_video_pool_get_object(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_put_surface:
* @context: a #GstVaapiContext
* @surface: the #GstVaapiSurface to release
*
* Releases a surface acquired by gst_vaapi_context_get_surface().
*/
void
gst_vaapi_context_put_surface(GstVaapiContext *context, GstVaapiSurface *surface)
{
g_return_if_fail(GST_VAAPI_IS_CONTEXT(context));
g_return_if_fail(GST_VAAPI_IS_SURFACE(surface));
gst_vaapi_video_pool_put_object(context->priv->surfaces_pool, surface);
}
/**
* gst_vaapi_context_find_surface_by_id:
* @context: a #GstVaapiContext
* @id: the VA surface id to find
*
* Finds VA surface by @id in the list of surfaces attached to the @context.
*
* Return value: the matching #GstVaapiSurface object, or %NULL if
* none was found
*/
GstVaapiSurface *
gst_vaapi_context_find_surface_by_id(GstVaapiContext *context, GstVaapiID id)
{
GstVaapiContextPrivate *priv;
GstVaapiSurface *surface;
guint i;
g_return_val_if_fail(GST_VAAPI_IS_CONTEXT(context), NULL);
priv = context->priv;
g_return_val_if_fail(priv->surfaces, NULL);
for (i = 0; i < priv->surfaces->len; i++) {
surface = g_ptr_array_index(priv->surfaces, i);
if (GST_VAAPI_OBJECT_ID(surface) == id)
return surface;
}
return NULL;
}
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