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plugins: add helpers to create video caps with features.
Add gst_vaapi_video_format_new_template_caps_with_features() helper function to add the supplied caps feature string on GStreamer >= 1.2. Add gst_vaapi_find_preferred_caps_feature() helper function to discover the "best" caps feature to use for the supplied pad. In practice, we will always favor memory:VASurface first, then meta:GLTextureUploadMeta, and finally the system memory caps. https://bugzilla.gnome.org/show_bug.cgi?id=719372
This commit is contained in:
Gwenole Beauchesne
parent
b065ae7d7f
commit
ef9819ecf4
2 changed files with 111 additions and 0 deletions
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@ -475,6 +475,98 @@ gst_vaapi_video_format_new_template_caps_from_list (GArray * formats)
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return caps;
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}
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GstCaps *
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gst_vaapi_video_format_new_template_caps_with_features (GstVideoFormat format,
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const gchar * features_string)
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{
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GstCaps *caps;
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caps = gst_vaapi_video_format_new_template_caps (format);
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if (!caps)
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return NULL;
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#if GST_CHECK_VERSION(1,1,0)
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GstCapsFeatures *const features =
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gst_caps_features_new (features_string, NULL);
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if (!features) {
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gst_caps_unref (caps);
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return NULL;
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}
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gst_caps_set_features (caps, 0, features);
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#endif
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return caps;
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}
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GstVaapiCapsFeature
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gst_vaapi_find_preferred_caps_feature (GstPad * pad, GstVideoFormat format)
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{
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GstVaapiCapsFeature feature = GST_VAAPI_CAPS_FEATURE_SYSTEM_MEMORY;
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#if GST_CHECK_VERSION(1,1,0)
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guint i, num_structures;
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GstCaps *caps = NULL;
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GstCaps *gl_texture_upload_caps = NULL;
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GstCaps *sysmem_caps = NULL;
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GstCaps *vaapi_caps = NULL;
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GstCaps *out_caps;
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out_caps = gst_pad_peer_query_caps (pad, NULL);
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if (!out_caps)
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goto cleanup;
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gl_texture_upload_caps =
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gst_vaapi_video_format_new_template_caps_with_features
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(GST_VIDEO_FORMAT_RGBA,
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GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META);
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if (!gl_texture_upload_caps)
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goto cleanup;
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if (format == GST_VIDEO_FORMAT_ENCODED)
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format = GST_VIDEO_FORMAT_NV12;
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vaapi_caps =
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gst_vaapi_video_format_new_template_caps_with_features (format,
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GST_CAPS_FEATURE_MEMORY_VAAPI_SURFACE);
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if (!vaapi_caps)
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goto cleanup;
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sysmem_caps =
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gst_vaapi_video_format_new_template_caps_with_features (format,
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GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY);
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if (!sysmem_caps)
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goto cleanup;
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num_structures = gst_caps_get_size (out_caps);
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for (i = 0; i < num_structures; i++) {
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GstCapsFeatures *const features = gst_caps_get_features (out_caps, i);
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GstStructure *const structure = gst_caps_get_structure (out_caps, i);
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caps = gst_caps_new_full (gst_structure_copy (structure), NULL);
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if (!caps)
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continue;
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gst_caps_set_features (caps, 0, gst_caps_features_copy (features));
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if (gst_caps_can_intersect (caps, vaapi_caps) &&
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feature < GST_VAAPI_CAPS_FEATURE_VAAPI_SURFACE)
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feature = GST_VAAPI_CAPS_FEATURE_VAAPI_SURFACE;
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else if (gst_caps_can_intersect (caps, gl_texture_upload_caps) &&
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feature < GST_VAAPI_CAPS_FEATURE_GL_TEXTURE_UPLOAD_META)
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feature = GST_VAAPI_CAPS_FEATURE_GL_TEXTURE_UPLOAD_META;
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else if (gst_caps_can_intersect (caps, sysmem_caps) &&
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feature < GST_VAAPI_CAPS_FEATURE_SYSTEM_MEMORY)
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feature = GST_VAAPI_CAPS_FEATURE_SYSTEM_MEMORY;
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gst_caps_replace (&caps, NULL);
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}
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cleanup:
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gst_caps_replace (&gl_texture_upload_caps, NULL);
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gst_caps_replace (&sysmem_caps, NULL);
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gst_caps_replace (&vaapi_caps, NULL);
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gst_caps_replace (&caps, NULL);
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gst_caps_replace (&out_caps, NULL);
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#endif
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return feature;
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}
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gboolean
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gst_caps_set_interlaced (GstCaps * caps, GstVideoInfo * vip)
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{
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@ -27,6 +27,9 @@
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#include <gst/vaapi/gstvaapidisplay.h>
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#include <gst/vaapi/gstvaapisurface.h>
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#if GST_CHECK_VERSION(1,0,0)
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#include "gstvaapivideomemory.h"
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#endif
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G_GNUC_INTERNAL
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gboolean
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@ -65,6 +68,13 @@ gboolean
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gst_vaapi_value_set_format_list (GValue * value, GArray * formats);
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/* Helpers to build video caps */
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typedef enum
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{
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GST_VAAPI_CAPS_FEATURE_SYSTEM_MEMORY = 1,
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GST_VAAPI_CAPS_FEATURE_GL_TEXTURE_UPLOAD_META,
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GST_VAAPI_CAPS_FEATURE_VAAPI_SURFACE,
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} GstVaapiCapsFeature;
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G_GNUC_INTERNAL
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GstCaps *
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gst_vaapi_video_format_new_template_caps (GstVideoFormat format);
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@ -73,6 +83,15 @@ G_GNUC_INTERNAL
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GstCaps *
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gst_vaapi_video_format_new_template_caps_from_list (GArray * formats);
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G_GNUC_INTERNAL
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GstCaps *
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gst_vaapi_video_format_new_template_caps_with_features (GstVideoFormat format,
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const gchar * features_string);
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G_GNUC_INTERNAL
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GstVaapiCapsFeature
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gst_vaapi_find_preferred_caps_feature (GstPad * pad, GstVideoFormat format);
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/* Helpers to handle interlaced contents */
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#if GST_CHECK_VERSION(1,0,0)
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# define GST_CAPS_INTERLACED_MODES \
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