From 38f1a4ee3da82dc279d732a4ada2ad2875e011fc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Manuel=20J=C3=A1quez=20Leal?=
 <vjaquez@igalia.com>
Date: Tue, 20 Sep 2022 19:11:35 +0200
Subject: [PATCH] vaencoder: Add gst_va_encoder_get_reconstruct_pool_config()

This method will return the caps configured in the reconstruct buffer
pool, and its maxium number of buffers to allocate.

The caps are needed later to know if the internal encoder has to be
reopened if the stream properties change.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2466>
---
 .../gst-plugins-bad/sys/va/gstvaencoder.c     | 22 +++++++++++++++++++
 .../gst-plugins-bad/sys/va/gstvaencoder.h     |  3 +++
 2 files changed, 25 insertions(+)

diff --git a/subprojects/gst-plugins-bad/sys/va/gstvaencoder.c b/subprojects/gst-plugins-bad/sys/va/gstvaencoder.c
index db836e27aa..3e0c2b3a71 100644
--- a/subprojects/gst-plugins-bad/sys/va/gstvaencoder.c
+++ b/subprojects/gst-plugins-bad/sys/va/gstvaencoder.c
@@ -534,6 +534,28 @@ gst_va_encoder_new (GstVaDisplay * display, guint32 codec,
   return self;
 }
 
+gboolean
+gst_va_encoder_get_reconstruct_pool_config (GstVaEncoder * self,
+    GstCaps ** caps, guint * max_surfaces)
+{
+  GstStructure *config;
+  gboolean ret;
+
+  g_return_val_if_fail (GST_IS_VA_ENCODER (self), FALSE);
+
+  if (!gst_va_encoder_is_open (self))
+    return FALSE;
+
+  if (!self->recon_pool)
+    return FALSE;
+
+  config = gst_buffer_pool_get_config (self->recon_pool);
+  ret = gst_buffer_pool_config_get_params (config, caps, NULL, NULL,
+      max_surfaces);
+  gst_structure_free (config);
+  return ret;
+}
+
 gboolean
 gst_va_encoder_has_profile (GstVaEncoder * self, VAProfile profile)
 {
diff --git a/subprojects/gst-plugins-bad/sys/va/gstvaencoder.h b/subprojects/gst-plugins-bad/sys/va/gstvaencoder.h
index 2152f0b78d..9def53279d 100644
--- a/subprojects/gst-plugins-bad/sys/va/gstvaencoder.h
+++ b/subprojects/gst-plugins-bad/sys/va/gstvaencoder.h
@@ -56,6 +56,9 @@ gboolean              gst_va_encoder_open                 (GstVaEncoder * self,
                                                            guint rc_ctrl,
                                                            guint32 packed_headers);
 gboolean              gst_va_encoder_close                (GstVaEncoder * self);
+gboolean              gst_va_encoder_get_reconstruct_pool_config (GstVaEncoder * self,
+                                                                  GstCaps ** caps,
+                                                                  guint * max_surfaces);
 gboolean              gst_va_encoder_has_profile          (GstVaEncoder * self,
                                                            VAProfile profile);
 gint                  gst_va_encoder_get_max_slice_num    (GstVaEncoder * self,