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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-27 04:01:08 +00:00
applemedia: vtdec: improve negotiation
Rework negotiation implementing GstVideoDecoder::negotiate. Make it possible to switch texture sharing on and off at runtime. Useful to (eventually) turn texture sharing on in pipelines where glimagesink is linked only after decoding has already started (for example OWR).
This commit is contained in:
Alessandro Decina
parent
8f14882b44
commit
119e09eac3
2 changed files with 111 additions and 102 deletions
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@ -59,8 +59,7 @@ static void gst_vtdec_finalize (GObject * object);
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static gboolean gst_vtdec_start (GstVideoDecoder * decoder);
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static gboolean gst_vtdec_stop (GstVideoDecoder * decoder);
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static gboolean gst_vtdec_decide_allocation (GstVideoDecoder * decoder,
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GstQuery * query);
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static gboolean gst_vtdec_negotiate (GstVideoDecoder * decoder);
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static gboolean gst_vtdec_set_format (GstVideoDecoder * decoder,
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GstVideoCodecState * state);
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static gboolean gst_vtdec_flush (GstVideoDecoder * decoder);
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@ -156,8 +155,7 @@ gst_vtdec_class_init (GstVtdecClass * klass)
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gobject_class->finalize = gst_vtdec_finalize;
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video_decoder_class->start = GST_DEBUG_FUNCPTR (gst_vtdec_start);
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video_decoder_class->stop = GST_DEBUG_FUNCPTR (gst_vtdec_stop);
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video_decoder_class->decide_allocation =
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GST_DEBUG_FUNCPTR (gst_vtdec_decide_allocation);
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video_decoder_class->negotiate = GST_DEBUG_FUNCPTR (gst_vtdec_negotiate);
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video_decoder_class->set_format = GST_DEBUG_FUNCPTR (gst_vtdec_set_format);
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video_decoder_class->flush = GST_DEBUG_FUNCPTR (gst_vtdec_flush);
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video_decoder_class->finish = GST_DEBUG_FUNCPTR (gst_vtdec_finish);
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@ -199,6 +197,10 @@ gst_vtdec_stop (GstVideoDecoder * decoder)
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{
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GstVtdec *vtdec = GST_VTDEC (decoder);
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if (vtdec->input_state)
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gst_video_codec_state_unref (vtdec->input_state);
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vtdec->input_state = NULL;
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if (vtdec->session)
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gst_vtdec_invalidate_session (vtdec);
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@ -211,46 +213,34 @@ gst_vtdec_stop (GstVideoDecoder * decoder)
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return TRUE;
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}
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static gboolean
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gst_vtdec_decide_allocation (GstVideoDecoder * decoder, GstQuery * query)
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static GstGLContext *
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query_gl_context (GstVtdec * vtdec)
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{
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gboolean ret;
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GstCaps *caps;
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GstCapsFeatures *features;
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GstVtdec *vtdec = GST_VTDEC (decoder);
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ret =
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GST_VIDEO_DECODER_CLASS (gst_vtdec_parent_class)->decide_allocation
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(decoder, query);
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if (!ret)
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goto out;
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gst_query_parse_allocation (query, &caps, NULL);
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if (caps) {
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GstGLContext *gl_context = NULL;
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features = gst_caps_get_features (caps, 0);
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if (gst_caps_features_contains (features,
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GST_CAPS_FEATURE_MEMORY_GL_MEMORY)) {
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GstContext *context = NULL;
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GstQuery *query = gst_query_new_context ("gst.gl.local_context");
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if (gst_pad_peer_query (GST_VIDEO_DECODER_SRC_PAD (decoder), query)) {
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GstQuery *query;
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query = gst_query_new_context ("gst.gl.local_context");
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if (gst_pad_peer_query (GST_VIDEO_DECODER_SRC_PAD (vtdec), query)) {
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gst_query_parse_context (query, &context);
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if (context) {
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const GstStructure *s = gst_context_get_structure (context);
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gst_structure_get (s, "context", GST_GL_TYPE_CONTEXT, &gl_context,
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NULL);
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gst_structure_get (s, "context", GST_GL_TYPE_CONTEXT, &gl_context, NULL);
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}
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}
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gst_query_unref (query);
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if (context) {
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return gl_context;
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}
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static void
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setup_texture_cache (GstVtdec * vtdec, GstGLContext * context)
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{
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GstVideoFormat internal_format;
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GstVideoCodecState *output_state =
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gst_video_decoder_get_output_state (decoder);
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gst_video_decoder_get_output_state (GST_VIDEO_DECODER (vtdec));
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GST_INFO_OBJECT (decoder, "pushing textures. GL context %p", context);
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GST_INFO_OBJECT (vtdec, "pushing textures. GL context %p", context);
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if (vtdec->texture_cache)
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gst_core_video_texture_cache_free (vtdec->texture_cache);
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@ -259,64 +249,76 @@ gst_vtdec_decide_allocation (GstVideoDecoder * decoder, GstQuery * query)
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#else
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internal_format = GST_VIDEO_FORMAT_UYVY;
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#endif
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vtdec->texture_cache = gst_core_video_texture_cache_new (gl_context);
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vtdec->texture_cache = gst_core_video_texture_cache_new (context);
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gst_core_video_texture_cache_set_format (vtdec->texture_cache,
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internal_format, output_state->caps);
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gst_video_codec_state_unref (output_state);
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gst_object_unref (gl_context);
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} else {
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GST_WARNING_OBJECT (decoder,
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"got memory:GLMemory caps but not GL context from downstream element");
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}
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}
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}
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out:
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return ret;
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}
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static gboolean
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gst_vtdec_negotiate_output_format (GstVtdec * vtdec,
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GstVideoCodecState * input_state)
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caps_filter_out_gl_memory (GstCapsFeatures * features, GstStructure * structure,
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gpointer user_data)
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{
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return !gst_caps_features_contains (features,
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GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
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}
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static gboolean
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gst_vtdec_negotiate (GstVideoDecoder * decoder)
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{
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GstCaps *caps = NULL, *peercaps = NULL, *templcaps;
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GstVideoFormat output_format;
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GstVideoCodecState *output_state = NULL;
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GstCapsFeatures *features;
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GstCaps *caps = NULL, *prevcaps = NULL;
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GstVideoFormat format;
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GstStructure *structure;
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const gchar *s;
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GstGLContext *context;
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GstVtdec *vtdec;
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gboolean ret = TRUE;
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peercaps = gst_pad_peer_query_caps (GST_VIDEO_DECODER_SRC_PAD (vtdec), NULL);
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/* Check if output supports GL caps by preference */
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templcaps = gst_pad_get_pad_template_caps (GST_VIDEO_DECODER_SRC_PAD (vtdec));
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vtdec = GST_VTDEC (decoder);
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caps =
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gst_caps_intersect_full (templcaps, peercaps, GST_CAPS_INTERSECT_FIRST);
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gst_caps_unref (peercaps);
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gst_caps_unref (templcaps);
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gst_caps_make_writable (gst_pad_query_caps (GST_VIDEO_DECODER_SRC_PAD
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(vtdec), NULL));
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context = query_gl_context (vtdec);
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if (!context)
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gst_caps_filter_and_map_in_place (caps, caps_filter_out_gl_memory, NULL);
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caps = gst_caps_truncate (caps);
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structure = gst_caps_get_structure (caps, 0);
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s = gst_structure_get_string (structure, "format");
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output_format = gst_video_format_from_string (s);
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features = gst_caps_features_copy (gst_caps_get_features (caps, 0));
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format = gst_video_format_from_string (s);
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gst_caps_unref (caps);
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if (!gst_vtdec_create_session (vtdec, output_format)) {
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gst_caps_features_free (features);
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return FALSE;
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}
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output_state = gst_video_decoder_set_output_state (GST_VIDEO_DECODER (vtdec),
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output_format, vtdec->video_info.width, vtdec->video_info.height,
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input_state);
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format, vtdec->video_info.width, vtdec->video_info.height,
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vtdec->input_state);
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output_state->caps = gst_video_info_to_caps (&output_state->info);
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gst_caps_set_features (output_state->caps, 0, features);
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if (output_state->info.finfo->format == GST_VIDEO_FORMAT_RGBA) {
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setup_texture_cache (vtdec, context);
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gst_caps_set_features (output_state->caps, 0,
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gst_caps_features_new (GST_CAPS_FEATURE_MEMORY_GL_MEMORY, NULL));
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}
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if (context)
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gst_object_unref (context);
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return TRUE;
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GST_INFO_OBJECT (vtdec, "negotiated output format %" GST_PTR_FORMAT,
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output_state->caps);
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prevcaps = gst_pad_get_current_caps (decoder->srcpad);
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if (!prevcaps || !gst_caps_is_equal (prevcaps, output_state->caps)) {
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if (vtdec->session) {
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gst_vtdec_push_frames_if_needed (vtdec, TRUE, FALSE);
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gst_vtdec_invalidate_session (vtdec);
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}
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ret = gst_vtdec_create_session (vtdec, format);
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}
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if (prevcaps)
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gst_caps_unref (prevcaps);
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if (!ret)
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return ret;
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return GST_VIDEO_DECODER_CLASS (gst_vtdec_parent_class)->negotiate (decoder);
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}
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static gboolean
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@ -345,8 +347,10 @@ gst_vtdec_set_format (GstVideoDecoder * decoder, GstVideoCodecState * state)
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return TRUE;
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}
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if (vtdec->session)
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if (vtdec->session) {
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gst_vtdec_push_frames_if_needed (vtdec, TRUE, FALSE);
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gst_vtdec_invalidate_session (vtdec);
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}
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gst_video_info_from_caps (&vtdec->video_info, state->caps);
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@ -366,8 +370,9 @@ gst_vtdec_set_format (GstVideoDecoder * decoder, GstVideoCodecState * state)
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CFRelease (vtdec->format_description);
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vtdec->format_description = format_description;
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if (!gst_vtdec_negotiate_output_format (vtdec, state))
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return FALSE;
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if (vtdec->input_state)
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gst_video_codec_state_unref (vtdec->input_state);
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vtdec->input_state = gst_video_codec_state_ref (state);
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return TRUE;
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}
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@ -444,6 +449,16 @@ error:
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goto out;
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}
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static void
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gst_vtdec_invalidate_session (GstVtdec * vtdec)
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{
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g_return_if_fail (vtdec->session);
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VTDecompressionSessionInvalidate (vtdec->session);
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CFRelease (vtdec->session);
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vtdec->session = NULL;
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}
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static gboolean
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gst_vtdec_create_session (GstVtdec * vtdec, GstVideoFormat format)
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{
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@ -453,6 +468,8 @@ gst_vtdec_create_session (GstVtdec * vtdec, GstVideoFormat format)
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OSStatus status;
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guint32 cv_format = 0;
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g_return_val_if_fail (vtdec->session == NULL, FALSE);
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switch (format) {
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case GST_VIDEO_FORMAT_NV12:
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cv_format = kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
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@ -514,16 +531,6 @@ gst_vtdec_create_session (GstVtdec * vtdec, GstVideoFormat format)
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return TRUE;
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}
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static void
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gst_vtdec_invalidate_session (GstVtdec * vtdec)
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{
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g_return_if_fail (vtdec->session);
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VTDecompressionSessionInvalidate (vtdec->session);
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CFRelease (vtdec->session);
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vtdec->session = NULL;
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}
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static CMFormatDescriptionRef
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create_format_description (GstVtdec * vtdec, CMVideoCodecType cm_format)
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{
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@ -793,8 +800,9 @@ gst_vtdec_push_frames_if_needed (GstVtdec * vtdec, gboolean drain,
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*/
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/* negotiate now so that we know whether we need to use the GL upload meta or
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* not */
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if (gst_pad_check_reconfigure (decoder->srcpad))
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if (gst_pad_check_reconfigure (decoder->srcpad)) {
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gst_video_decoder_negotiate (decoder);
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}
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if (drain)
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VTDecompressionSessionWaitForAsynchronousFrames (vtdec->session);
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@ -41,6 +41,7 @@ typedef struct _GstVtdecClass GstVtdecClass;
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struct _GstVtdec
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{
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GstVideoDecoder base_vtdec;
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GstVideoCodecState *input_state;
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GstVideoInfo video_info;
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CMFormatDescriptionRef format_description;
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VTDecompressionSessionRef session;
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