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vaapidecode: generate source pad caps

Browse source 
Just as vaapipostproc, VA decoder's context can be queried to get the possible
raw formats, so, the src caps can negotiate the exact caps that the context
supports.
This commit is contained in:
Víctor Manuel Jáquez Leal 2016-07-19 16:40:10 +02:00
parent b09f592a4c
commit 6d11a0098e
2 changed files with 53 additions and 4 deletions
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56
gst/vaapi/gstvaapidecode.c
View file

@ -200,12 +200,59 @@ gst_vaapidecode_update_sink_caps (GstVaapiDecode * decode, GstCaps * caps)
return TRUE;
}
static gboolean
gst_vaapidecode_ensure_allowed_srcpad_caps (GstVaapiDecode * decode)
{
GstCaps *out_caps, *raw_caps;
if (decode->allowed_srcpad_caps)
return TRUE;
if (!GST_VAAPI_PLUGIN_BASE_DISPLAY (decode))
return FALSE;
/* Create VA caps */
out_caps = gst_caps_from_string (GST_VAAPI_MAKE_SURFACE_CAPS ";"
GST_VAAPI_MAKE_GLTEXUPLOAD_CAPS);
if (!out_caps) {
GST_WARNING_OBJECT (decode, "failed to create VA/GL source caps");
return FALSE;
}
raw_caps = gst_vaapi_plugin_base_get_allowed_raw_caps
(GST_VAAPI_PLUGIN_BASE (decode));
if (!raw_caps) {
gst_caps_unref (out_caps);
GST_WARNING_OBJECT (decode, "failed to create raw sink caps");
return FALSE;
}
out_caps = gst_caps_make_writable (out_caps);
gst_caps_append (out_caps, gst_caps_copy (raw_caps));
decode->allowed_srcpad_caps = out_caps;
GST_INFO_OBJECT (decode, "allowed srcpad caps: %" GST_PTR_FORMAT,
decode->allowed_srcpad_caps);
return TRUE;
}
static GstCaps *
gst_vaapidecode_get_allowed_srcpad_caps (GstVaapiDecode * decode)
{
GstPad *const srcpad = GST_VIDEO_DECODER_SRC_PAD (decode);
if (gst_vaapidecode_ensure_allowed_srcpad_caps (decode))
return gst_caps_ref (decode->allowed_srcpad_caps);
return gst_pad_get_pad_template_caps (srcpad);
}
static gboolean
gst_vaapidecode_update_src_caps (GstVaapiDecode * decode)
{
GstVideoDecoder *const vdec = GST_VIDEO_DECODER (decode);
GstPad *const srcpad = GST_VIDEO_DECODER_SRC_PAD (vdec);
GstCaps *templ;
GstCaps *allowed;
GstVideoCodecState *state, *ref_state;
GstVaapiCapsFeature feature;
GstCapsFeatures *features;
@ -223,9 +270,9 @@ gst_vaapidecode_update_src_caps (GstVaapiDecode * decode)
ref_state = decode->input_state;
format = GST_VIDEO_INFO_FORMAT (&decode->decoded_info);
templ = gst_pad_get_pad_template_caps (srcpad);
feature = gst_vaapi_find_preferred_caps_feature (srcpad, templ, &format);
gst_caps_unref (templ);
allowed = gst_vaapidecode_get_allowed_srcpad_caps (decode);
feature = gst_vaapi_find_preferred_caps_feature (srcpad, allowed, &format);
gst_caps_unref (allowed);
if (feature == GST_VAAPI_CAPS_FEATURE_NOT_NEGOTIATED)
return FALSE;
@ -934,6 +981,7 @@ gst_vaapidecode_close (GstVideoDecoder * vdec)
GstVaapiDecode *const decode = GST_VAAPIDECODE (vdec);
gst_vaapidecode_destroy (decode);
gst_caps_replace (&decode->allowed_srcpad_caps, NULL);
gst_vaapi_plugin_base_close (GST_VAAPI_PLUGIN_BASE (decode));
return TRUE;
}

1
gst/vaapi/gstvaapidecode.h
View file

@ -47,6 +47,7 @@ struct _GstVaapiDecode {
GCond surface_ready;
GstCaps *decoder_caps;
GstCaps *allowed_sinkpad_caps;
GstCaps *allowed_srcpad_caps;
guint current_frame_size;
guint has_texture_upload_meta : 1;