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context: allow dynamic growth of VA surfaces pool.

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Add support for dynamic growth of the VA surfaces pool. For decoding,
this implies the recreation of the underlying VA context, as per the
requirement from VA-API. Besides, only increases are supported, not
shrinks.
This commit is contained in:
Gwenole Beauchesne 2014-05-03 15:56:51 +02:00
parent 906a561c26
commit 446aa9acf8
1 changed files with 36 additions and 19 deletions
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55
gst-libs/gst/vaapi/gstvaapicontext.c
View file

@ -47,6 +47,9 @@
/* 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)
static void
unref_surface_cb (GstVaapiSurface * surface)
{
@ -105,16 +108,34 @@ context_destroy (GstVaapiContext * context)
}
}
static gboolean
context_ensure_surfaces (GstVaapiContext * context)
{
const GstVaapiContextInfo *const cip = &context->info;
const guint num_surfaces = cip->ref_frames + SCRATCH_SURFACES_COUNT;
GstVaapiSurface *surface;
guint i;
for (i = context->surfaces->len; i < num_surfaces; i++) {
surface = gst_vaapi_surface_new (GST_VAAPI_OBJECT_DISPLAY (context),
cip->chroma_type, cip->width, cip->height);
if (!surface)
return FALSE;
gst_vaapi_surface_set_parent_context (surface, context);
g_ptr_array_add (context->surfaces, surface);
if (!gst_vaapi_video_pool_add_object (context->surfaces_pool, surface))
return FALSE;
}
gst_vaapi_video_pool_set_capacity (context->surfaces_pool, num_surfaces);
return TRUE;
}
static gboolean
context_create_surfaces (GstVaapiContext * context)
{
const GstVaapiContextInfo *const cip = &context->info;
GstVideoInfo vi;
GstVaapiSurface *surface;
guint i, num_surfaces;
/* Number of scratch surfaces beyond those used as reference */
const guint SCRATCH_SURFACES_COUNT = 4;
guint num_surfaces;
if (!gst_vaapi_context_overlay_reset (context))
return FALSE;
@ -135,19 +156,7 @@ context_create_surfaces (GstVaapiContext * context)
if (!context->surfaces_pool)
return FALSE;
}
gst_vaapi_video_pool_set_capacity (context->surfaces_pool, num_surfaces);
for (i = context->surfaces->len; i < num_surfaces; i++) {
surface = gst_vaapi_surface_new (GST_VAAPI_OBJECT_DISPLAY (context),
cip->chroma_type, cip->width, cip->height);
if (!surface)
return FALSE;
gst_vaapi_surface_set_parent_context (surface, context);
g_ptr_array_add (context->surfaces, surface);
if (!gst_vaapi_video_pool_add_object (context->surfaces_pool, surface))
return FALSE;
}
return TRUE;
return context_ensure_surfaces (context);
}
static gboolean
@ -370,6 +379,7 @@ gst_vaapi_context_reset (GstVaapiContext * context,
{
GstVaapiContextInfo *const cip = &context->info;
gboolean reset_surfaces = FALSE, reset_config = FALSE;
gboolean grow_surfaces = FALSE;
GstVaapiChromaType chroma_type;
chroma_type = new_cip->chroma_type ? new_cip->chroma_type :
@ -392,6 +402,11 @@ gst_vaapi_context_reset (GstVaapiContext * context,
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;
@ -400,7 +415,7 @@ gst_vaapi_context_reset (GstVaapiContext * context,
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)
if (reset_surfaces || grow_surfaces)
reset_config = TRUE;
}
@ -411,6 +426,8 @@ gst_vaapi_context_reset (GstVaapiContext * context,
if (reset_surfaces && !context_create_surfaces (context))
return FALSE;
else if (grow_surfaces && !context_ensure_surfaces (context))
return FALSE;
if (reset_config && !context_create (context))
return FALSE;
return TRUE;