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

788 lines
23 KiB
C

/*
* gstvaapicontext.c - VA context abstraction
*
* Copyright (C) 2010-2011 Splitted-Desktop Systems
* Author: Gwenole Beauchesne <gwenole.beauchesne@splitted-desktop.com>
* Copyright (C) 2011-2014 Intel Corporation
* Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
*
* 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 "gstvaapicompat.h"
#include "gstvaapicontext.h"
#include "gstvaapidisplay_priv.h"
#include "gstvaapisurface_priv.h"
#include "gstvaapisurfacepool.h"
#include "gstvaapisurfaceproxy.h"
#include "gstvaapivideopool_priv.h"
#include "gstvaapiutils.h"
/* Define default VA surface chroma format to YUV 4:2:0 */
#define DEFAULT_CHROMA_TYPE (GST_VAAPI_CHROMA_TYPE_YUV420)
/* Number of scratch surfaces beyond those used as reference */
#define SCRATCH_SURFACES_COUNT (4)
/* Debug category for GstVaapiContext */
GST_DEBUG_CATEGORY (gst_debug_vaapi_context);
#define GST_CAT_DEFAULT gst_debug_vaapi_context
static void
_init_vaapi_context_debug (void)
{
#ifndef GST_DISABLE_GST_DEBUG
static gsize _init = 0;
if (g_once_init_enter (&_init)) {
GST_DEBUG_CATEGORY_INIT (gst_debug_vaapi_context, "vaapicontext", 0,
"VA-API context");
g_once_init_leave (&_init, 1);
}
#endif
}
static inline gboolean
_context_is_broken_jpeg_decoder (GstVaapiContext * context)
{
GstVaapiDisplay *const display = GST_VAAPI_CONTEXT_DISPLAY (context);
return (context->info.profile == GST_VAAPI_PROFILE_JPEG_BASELINE
&& context->info.entrypoint == GST_VAAPI_ENTRYPOINT_VLD
&& gst_vaapi_display_has_driver_quirks (display,
GST_VAAPI_DRIVER_QUIRK_JPEG_DEC_BROKEN_FORMATS));
}
static gboolean
ensure_attributes (GstVaapiContext * context)
{
if (G_LIKELY (context->attribs))
return TRUE;
context->attribs =
gst_vaapi_config_surface_attributes_get (GST_VAAPI_CONTEXT_DISPLAY
(context), context->va_config);
if (!context->attribs)
return FALSE;
if (_context_is_broken_jpeg_decoder (context)) {
GstVideoFormat fmt = GST_VIDEO_FORMAT_NV12;
g_array_prepend_val (context->attribs->formats, fmt);
context->attribs->mem_types &= ~VA_SURFACE_ATTRIB_MEM_TYPE_DRM_PRIME;
}
return TRUE;
}
/* XXX(victor): verify the preferred video format concords with the
* chroma type; otherwise it is changed for the (very arbritrary)
* preferred format from the requested context chroma type, in the
* context attributes */
static void
ensure_preferred_format (GstVaapiContext * context)
{
const GstVaapiContextInfo *const cip = &context->info;
GArray *formats;
guint i;
if (context->preferred_format != GST_VIDEO_FORMAT_UNKNOWN)
return;
if (_context_is_broken_jpeg_decoder (context))
return;
if (!ensure_attributes (context) || !context->attribs->formats)
return;
formats = context->attribs->formats;
for (i = 0; i < formats->len; i++) {
GstVideoFormat format = g_array_index (formats, GstVideoFormat, i);
if (format == gst_vaapi_video_format_from_chroma (cip->chroma_type)) {
context->preferred_format = format;
break;
}
}
return;
}
static inline gboolean
context_get_attribute (GstVaapiContext * context, VAConfigAttribType type,
guint * out_value_ptr)
{
return gst_vaapi_get_config_attribute (GST_VAAPI_CONTEXT_DISPLAY (context),
context->va_profile, context->va_entrypoint, type, out_value_ptr);
}
static void
context_destroy_surfaces (GstVaapiContext * context)
{
if (context->surfaces) {
g_ptr_array_unref (context->surfaces);
context->surfaces = NULL;
}
context->preferred_format = GST_VIDEO_FORMAT_UNKNOWN;
gst_vaapi_video_pool_replace (&context->surfaces_pool, NULL);
}
static void
context_destroy (GstVaapiContext * context)
{
GstVaapiDisplay *const display = GST_VAAPI_CONTEXT_DISPLAY (context);
VAContextID context_id;
VAStatus status;
context_id = GST_VAAPI_CONTEXT_ID (context);
GST_DEBUG ("context 0x%08x / config 0x%08x", context_id, context->va_config);
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()"))
GST_WARNING ("failed to destroy context 0x%08x", context_id);
GST_VAAPI_CONTEXT_ID (context) = VA_INVALID_ID;
}
if (context->va_config != VA_INVALID_ID) {
GST_VAAPI_DISPLAY_LOCK (display);
status = vaDestroyConfig (GST_VAAPI_DISPLAY_VADISPLAY (display),
context->va_config);
GST_VAAPI_DISPLAY_UNLOCK (display);
if (!vaapi_check_status (status, "vaDestroyConfig()"))
GST_WARNING ("failed to destroy config 0x%08x", context->va_config);
context->va_config = VA_INVALID_ID;
}
if (context->attribs) {
gst_vaapi_config_surface_attributes_free (context->attribs);
context->attribs = NULL;
}
}
static gboolean
context_ensure_surfaces (GstVaapiContext * context)
{
GstVaapiDisplay *display = GST_VAAPI_CONTEXT_DISPLAY (context);
const GstVaapiContextInfo *const cip = &context->info;
const guint num_surfaces = cip->ref_frames + SCRATCH_SURFACES_COUNT;
GstVaapiSurface *surface;
GstVideoFormat format;
guint i, capacity;
ensure_preferred_format (context);
format = context->preferred_format;
for (i = context->surfaces->len; i < num_surfaces; i++) {
if (format != GST_VIDEO_FORMAT_UNKNOWN) {
surface = gst_vaapi_surface_new_with_format (display, format, cip->width,
cip->height, 0);
} else {
surface = gst_vaapi_surface_new (display, cip->chroma_type, cip->width,
cip->height);
}
if (!surface)
return FALSE;
g_ptr_array_add (context->surfaces, surface);
if (!gst_vaapi_video_pool_add_object (context->surfaces_pool, surface))
return FALSE;
}
capacity = cip->usage == GST_VAAPI_CONTEXT_USAGE_DECODE ? 0 : num_surfaces;
gst_vaapi_video_pool_set_capacity (context->surfaces_pool, capacity);
return TRUE;
}
static gboolean
context_create_surfaces (GstVaapiContext * context)
{
const GstVaapiContextInfo *const cip = &context->info;
GstVaapiDisplay *const display = GST_VAAPI_CONTEXT_DISPLAY (context);
guint num_surfaces;
num_surfaces = cip->ref_frames + SCRATCH_SURFACES_COUNT;
if (!context->surfaces) {
context->surfaces = g_ptr_array_new_full (num_surfaces,
(GDestroyNotify) gst_mini_object_unref);
if (!context->surfaces)
return FALSE;
}
if (!context->surfaces_pool) {
context->surfaces_pool =
gst_vaapi_surface_pool_new_with_chroma_type (display, cip->chroma_type,
cip->width, cip->height, 0);
if (!context->surfaces_pool)
return FALSE;
}
return context_ensure_surfaces (context);
}
static gboolean
context_create (GstVaapiContext * context)
{
const GstVaapiContextInfo *const cip = &context->info;
GstVaapiDisplay *const display = GST_VAAPI_CONTEXT_DISPLAY (context);
VAContextID context_id;
VASurfaceID surface_id;
VASurfaceID *surfaces_data = NULL;
VAStatus status;
GArray *surfaces = NULL;
gboolean success = FALSE;
guint i;
gint num_surfaces = 0;
if (!context->surfaces && !context_create_surfaces (context))
goto cleanup;
/* Create VA surfaces list for vaCreateContext() */
surfaces = g_array_sized_new (FALSE,
FALSE, sizeof (VASurfaceID), context->surfaces->len);
if (!surfaces)
goto cleanup;
for (i = 0; i < context->surfaces->len; i++) {
GstVaapiSurface *const surface = g_ptr_array_index (context->surfaces, i);
if (!surface)
goto cleanup;
surface_id = GST_VAAPI_SURFACE_ID (surface);
g_array_append_val (surfaces, surface_id);
}
g_assert (surfaces->len == context->surfaces->len);
/* vaCreateContext() doesn't really need an array of VASurfaceIDs (see
* https://lists.01.org/pipermail/intel-vaapi-media/2017-July/000052.html and
* https://github.com/intel/libva/issues/251); pass a dummy list of valid
* (non-null) IDs until the signature gets updated. */
if (cip->usage != GST_VAAPI_CONTEXT_USAGE_DECODE) {
surfaces_data = (VASurfaceID *) surfaces->data;
num_surfaces = surfaces->len;
}
GST_VAAPI_DISPLAY_LOCK (display);
status = vaCreateContext (GST_VAAPI_DISPLAY_VADISPLAY (display),
context->va_config, cip->width, cip->height, VA_PROGRESSIVE,
surfaces_data, num_surfaces, &context_id);
GST_VAAPI_DISPLAY_UNLOCK (display);
if (!vaapi_check_status (status, "vaCreateContext()"))
goto cleanup;
GST_VAAPI_CONTEXT_ID (context) = context_id;
success = TRUE;
cleanup:
if (surfaces)
g_array_unref (surfaces);
return success;
}
static gboolean
config_create (GstVaapiContext * context)
{
const GstVaapiContextInfo *const cip = &context->info;
GstVaapiDisplay *const display = GST_VAAPI_CONTEXT_DISPLAY (context);
VAConfigAttrib attribs[7], *attrib;
VAStatus status;
guint value, va_chroma_format, attrib_index;
/* Reset profile and entrypoint */
if (cip->profile == GST_VAAPI_PROFILE_UNKNOWN
|| cip->entrypoint == GST_VAAPI_ENTRYPOINT_INVALID)
goto cleanup;
context->va_profile = gst_vaapi_profile_get_va_profile (cip->profile);
context->va_entrypoint =
gst_vaapi_entrypoint_get_va_entrypoint (cip->entrypoint);
attrib_index = 0;
attrib = &attribs[attrib_index];
g_assert (attrib_index < G_N_ELEMENTS (attribs));
/* Validate VA surface format */
va_chroma_format = from_GstVaapiChromaType (cip->chroma_type);
if (!va_chroma_format)
goto cleanup;
attrib->type = VAConfigAttribRTFormat;
if (!context_get_attribute (context, attrib->type, &value))
goto cleanup;
if (!(value & va_chroma_format)) {
GST_ERROR ("unsupported chroma format (%s)",
string_of_va_chroma_format (va_chroma_format));
goto cleanup;
}
attrib->value = va_chroma_format;
attrib = &attribs[++attrib_index];
g_assert (attrib_index < G_N_ELEMENTS (attribs));
switch (cip->usage) {
#if USE_ENCODERS
case GST_VAAPI_CONTEXT_USAGE_ENCODE:
{
const GstVaapiConfigInfoEncoder *const config = &cip->config.encoder;
guint va_rate_control;
/* Rate control */
va_rate_control = from_GstVaapiRateControl (config->rc_mode);
if (va_rate_control != VA_RC_NONE) {
attrib->type = VAConfigAttribRateControl;
if (!context_get_attribute (context, attrib->type, &value))
goto cleanup;
if ((value & va_rate_control) != va_rate_control) {
GST_ERROR ("unsupported %s rate control",
string_of_VARateControl (va_rate_control));
goto cleanup;
}
attrib->value = va_rate_control;
attrib = &attribs[++attrib_index];
g_assert (attrib_index < G_N_ELEMENTS (attribs));
}
/* Packed headers */
if (config->packed_headers) {
attrib->type = VAConfigAttribEncPackedHeaders;
if (!context_get_attribute (context, attrib->type, &value))
goto cleanup;
if ((value & config->packed_headers) != config->packed_headers) {
GST_ERROR ("unsupported packed headers 0x%08x",
config->packed_headers & ~(value & config->packed_headers));
goto cleanup;
}
attrib->value = config->packed_headers;
attrib = &attribs[++attrib_index];
g_assert (attrib_index < G_N_ELEMENTS (attribs));
}
if (cip->profile == GST_VAAPI_PROFILE_JPEG_BASELINE) {
attrib->type = VAConfigAttribEncJPEG;
if (!context_get_attribute (context, attrib->type, &value))
goto cleanup;
attrib->value = value;
attrib = &attribs[++attrib_index];
g_assert (attrib_index < G_N_ELEMENTS (attribs));
}
#if VA_CHECK_VERSION(0,39,1)
if (config->roi_capability) {
VAConfigAttribValEncROI *roi_config;
attrib->type = VAConfigAttribEncROI;
if (!context_get_attribute (context, attrib->type, &value))
goto cleanup;
roi_config = (VAConfigAttribValEncROI *) & value;
if (roi_config->bits.num_roi_regions != config->roi_num_supported) {
GST_ERROR ("Mismatched ROI support: number of regions supported: %d",
roi_config->bits.num_roi_regions);
goto cleanup;
}
if (config->rc_mode != GST_VAAPI_RATECONTROL_CQP
&& VA_ROI_RC_QP_DELTA_SUPPORT (roi_config) == 0) {
GST_ERROR ("Mismatched ROI support: ROI delta QP: %d",
VA_ROI_RC_QP_DELTA_SUPPORT (roi_config));
goto cleanup;
}
attrib->value = value;
attrib = &attribs[++attrib_index];
g_assert (attrib_index < G_N_ELEMENTS (attribs));
}
#endif
break;
}
#endif
default:
break;
}
GST_VAAPI_DISPLAY_LOCK (display);
status = vaCreateConfig (GST_VAAPI_DISPLAY_VADISPLAY (display),
context->va_profile, context->va_entrypoint, attribs, attrib_index,
&context->va_config);
GST_VAAPI_DISPLAY_UNLOCK (display);
if (!vaapi_check_status (status, "vaCreateConfig()"))
goto cleanup;
return TRUE;
cleanup:
GST_WARNING ("Failed to create vaConfig");
return FALSE;
}
/** Updates config for encoding. Returns %TRUE if config changed */
static gboolean
context_update_config_encoder (GstVaapiContext * context,
const GstVaapiConfigInfoEncoder * new_config)
{
GstVaapiConfigInfoEncoder *const config = &context->info.config.encoder;
gboolean config_changed = FALSE;
g_assert (context->info.usage == GST_VAAPI_CONTEXT_USAGE_ENCODE);
if (config->rc_mode != new_config->rc_mode) {
config->rc_mode = new_config->rc_mode;
config_changed = TRUE;
}
if (config->packed_headers != new_config->packed_headers) {
config->packed_headers = new_config->packed_headers;
config_changed = TRUE;
}
if (config->roi_capability != new_config->roi_capability ||
config->roi_num_supported != new_config->roi_num_supported) {
config->roi_capability = new_config->roi_capability;
config->roi_num_supported = new_config->roi_num_supported;
config_changed = TRUE;
}
return config_changed;
}
static inline void
gst_vaapi_context_init (GstVaapiContext * context,
const GstVaapiContextInfo * new_cip)
{
GstVaapiContextInfo *const cip = &context->info;
*cip = *new_cip;
if (!cip->chroma_type)
cip->chroma_type = DEFAULT_CHROMA_TYPE;
context->va_config = VA_INVALID_ID;
context->reset_on_resize = TRUE;
context->attribs = NULL;
context->preferred_format = GST_VIDEO_FORMAT_UNKNOWN;
}
/**
* gst_vaapi_context_new:
* @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 (GstVaapiDisplay * display,
const GstVaapiContextInfo * cip)
{
GstVaapiContext *context;
g_return_val_if_fail (display, NULL);
_init_vaapi_context_debug ();
if (cip->profile == GST_VAAPI_PROFILE_UNKNOWN
|| cip->entrypoint == GST_VAAPI_ENTRYPOINT_INVALID)
return NULL;
context = g_slice_new (GstVaapiContext);
if (!context)
return NULL;
GST_VAAPI_CONTEXT_DISPLAY (context) = gst_object_ref (display);
GST_VAAPI_CONTEXT_ID (context) = VA_INVALID_ID;
g_atomic_int_set (&context->ref_count, 1);
context->surfaces = NULL;
context->surfaces_pool = NULL;
gst_vaapi_context_init (context, cip);
if (!config_create (context))
goto error;
/* this means we don't want to create a VAcontext */
if (cip->width == 0 && cip->height == 0)
goto done;
/* this is not valid */
if (cip->width == 0 || cip->height == 0)
goto error;
if (!context_create (context))
goto error;
done:
GST_DEBUG ("context 0x%08" G_GSIZE_MODIFIER "x / config 0x%08x",
GST_VAAPI_CONTEXT_ID (context), context->va_config);
return context;
/* ERRORS */
error:
{
gst_vaapi_context_unref (context);
return NULL;
}
}
/**
* gst_vaapi_context_reset:
* @context: a #GstVaapiContext
* @new_cip: a pointer to the new #GstVaapiContextInfo details
*
* Resets @context to the configuration specified by @new_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 (GstVaapiContext * context,
const GstVaapiContextInfo * new_cip)
{
GstVaapiContextInfo *const cip = &context->info;
gboolean reset_surfaces = FALSE, reset_config = FALSE;
gboolean grow_surfaces = FALSE;
GstVaapiChromaType chroma_type;
if (new_cip->profile == GST_VAAPI_PROFILE_UNKNOWN
|| new_cip->entrypoint == GST_VAAPI_ENTRYPOINT_INVALID)
return FALSE;
chroma_type = new_cip->chroma_type ? new_cip->chroma_type :
DEFAULT_CHROMA_TYPE;
if (cip->chroma_type != chroma_type) {
cip->chroma_type = chroma_type;
reset_surfaces = TRUE;
}
if (cip->width != new_cip->width || cip->height != new_cip->height) {
cip->width = new_cip->width;
cip->height = new_cip->height;
reset_surfaces = TRUE;
}
if (cip->profile != new_cip->profile ||
cip->entrypoint != new_cip->entrypoint) {
cip->profile = new_cip->profile;
cip->entrypoint = new_cip->entrypoint;
reset_config = TRUE;
}
if (cip->ref_frames < new_cip->ref_frames) {
cip->ref_frames = new_cip->ref_frames;
grow_surfaces = TRUE;
}
if (cip->usage != new_cip->usage) {
cip->usage = new_cip->usage;
reset_config = TRUE;
memcpy (&cip->config, &new_cip->config, sizeof (cip->config));
} else if (new_cip->usage == GST_VAAPI_CONTEXT_USAGE_ENCODE) {
if (context_update_config_encoder (context, &new_cip->config.encoder))
reset_config = TRUE;
} else if (new_cip->usage == GST_VAAPI_CONTEXT_USAGE_DECODE) {
if ((reset_surfaces && context->reset_on_resize) || grow_surfaces)
reset_config = TRUE;
}
if (reset_surfaces)
context_destroy_surfaces (context);
if (reset_config)
context_destroy (context);
if (reset_config && !(config_create (context) && context_create (context)))
return FALSE;
if (reset_surfaces && !context_create_surfaces (context))
return FALSE;
else if (grow_surfaces && !context_ensure_surfaces (context))
return FALSE;
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 (context != NULL, VA_INVALID_ID);
return GST_VAAPI_CONTEXT_ID (context);
}
/**
* 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 (context != NULL, NULL);
return
gst_vaapi_surface_proxy_new_from_pool (GST_VAAPI_SURFACE_POOL
(context->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 (context != NULL, 0);
if (gst_vaapi_video_pool_get_capacity (context->surfaces_pool) == 0)
return G_MAXUINT;
return gst_vaapi_video_pool_get_size (context->surfaces_pool);
}
/**
* gst_vaapi_context_reset_on_resize:
* @context: a #GstVaapiContext
* @reset_on_resize: Should the context be reset on size change
*
* Sets whether the underlying context should be reset when a size change
* happens. The proper setting for this is codec dependent.
*/
void
gst_vaapi_context_reset_on_resize (GstVaapiContext * context,
gboolean reset_on_resize)
{
g_return_if_fail (context != NULL);
context->reset_on_resize = reset_on_resize;
}
/**
* gst_vaapi_context_get_surface_formats:
* @context: a #GstVaapiContext
*
* Determines the set of supported formats by the surfaces associated
* to @context. The caller owns an extra reference of the resulting
* array of #GstVideoFormat elements, so it shall be released with
* g_array_unref after usage.
*
* Return value: (transfer full): the set of target formats supported
* by the surfaces in @context.
*/
GArray *
gst_vaapi_context_get_surface_formats (GstVaapiContext * context)
{
g_return_val_if_fail (context, NULL);
if (!ensure_attributes (context))
return NULL;
if (context->attribs->formats)
return g_array_ref (context->attribs->formats);
return NULL;
}
/**
* gst_vaapi_context_get_surface_attributes:
* @context: a #GstVaapiContext
* @out_attribs: an allocated #GstVaapiConfigSurfaceAttributes
*
* Copy context's surface restrictions to @out_attribs, EXCEPT the
* color formats. Use gst_vaapi_context_get_surface_formats() to get
* them.
*
* Returns: %TRUE if the attributes were extracted and copied; %FALSE,
* otherwise
**/
gboolean
gst_vaapi_context_get_surface_attributes (GstVaapiContext * context,
GstVaapiConfigSurfaceAttributes * out_attribs)
{
g_return_val_if_fail (context, FALSE);
if (!ensure_attributes (context))
return FALSE;
if (out_attribs) {
out_attribs->min_width = context->attribs->min_width;
out_attribs->min_height = context->attribs->min_height;
out_attribs->max_width = context->attribs->max_width;
out_attribs->max_height = context->attribs->max_height;
out_attribs->mem_types = context->attribs->mem_types;
out_attribs->formats = NULL;
}
return TRUE;
}
/**
* gst_vaapi_context_ref:
* @context: a #GstVaapiContext
*
* Atomically increases the reference count of the given @context by one.
*
* Returns: The same @context argument
*/
GstVaapiContext *
gst_vaapi_context_ref (GstVaapiContext * context)
{
g_return_val_if_fail (context != NULL, NULL);
g_atomic_int_inc (&context->ref_count);
return context;
}
/**
* gst_vaapi_context_unref:
* @context: a #GstVaapiContext
*
* Atomically decreases the reference count of the @context by one. If
* the reference count reaches zero, the object will be free'd.
*/
void
gst_vaapi_context_unref (GstVaapiContext * context)
{
g_return_if_fail (context != NULL);
g_return_if_fail (context->ref_count > 0);
if (g_atomic_int_dec_and_test (&context->ref_count)) {
context_destroy (context);
context_destroy_surfaces (context);
gst_vaapi_display_replace (&context->display, NULL);
g_slice_free (GstVaapiContext, context);
}
}