From ba5dc03aecc1d96f81b76838f845ebde7348cf62 Mon Sep 17 00:00:00 2001
From: David Rosca <nowrep@gmail.com>
Date: Fri, 20 Dec 2024 20:24:36 +0100
Subject: [PATCH] avcodec: vaapi: Support VAAPI with latest FFmpeg

---
 configure.ac                            | 20 +------------
 modules/codec/Makefile.am               |  2 +-
 modules/codec/avcodec/avcommon_compat.h |  3 ++
 modules/codec/avcodec/vaapi.c           | 38 +++++++++++++++++++++++--
 4 files changed, 41 insertions(+), 22 deletions(-)

diff --git a/configure.ac b/configure.ac
index 00afb063c455..089339e10e0b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2550,25 +2550,7 @@ AM_CONDITIONAL([HAVE_VAAPI], [test "${have_vaapi}" = "yes"])
 AM_CONDITIONAL([HAVE_VAAPI_DRM], [test "${have_vaapi_drm}" = "yes"])
 AM_CONDITIONAL([HAVE_VAAPI_X11], [test "${have_vaapi_x11}" = "yes"])
 AM_CONDITIONAL([HAVE_VAAPI_WL], [test "${have_vaapi_wl}" = "yes"])
-
-have_avcodec_vaapi="no"
-AS_IF([test "${have_vaapi}" = "yes" -a "${have_avcodec}" = "yes"], [
-  VLC_SAVE_FLAGS
-  CPPFLAGS="${CPPFLAGS} ${AVCODEC_CFLAGS}"
-  CFLAGS="${CFLAGS} ${AVCODEC_CFLAGS}"
-  AC_CHECK_HEADERS([libavcodec/vaapi.h], [
-    AC_MSG_NOTICE([VA API acceleration activated])
-    have_avcodec_vaapi="yes"
-  ],[
-    AS_IF([test -n "${enable_libva}"], [
-      AC_MSG_ERROR([libva is present but libavcodec/vaapi.h is missing])
-    ], [
-      AC_MSG_WARN([libva is present but libavcodec/vaapi.h is missing ])
-    ])
-  ])
-  VLC_RESTORE_FLAGS
-])
-AM_CONDITIONAL([HAVE_AVCODEC_VAAPI], [test "${have_avcodec_vaapi}" = "yes"])
+AM_CONDITIONAL([HAVE_AVCODEC_VAAPI], [test "${have_vaapi}" = "yes" -a "${have_avcodec}" = "yes"])
 
 dnl
 dnl dxva2 needs avcodec
diff --git a/modules/codec/Makefile.am b/modules/codec/Makefile.am
index 6d9465fdaef9..dd04391c1bf7 100644
--- a/modules/codec/Makefile.am
+++ b/modules/codec/Makefile.am
@@ -416,7 +416,7 @@ libvaapi_plugin_la_SOURCES = \
 	codec/avcodec/vaapi.c hw/vaapi/vlc_vaapi.c hw/vaapi/vlc_vaapi.h
 libvaapi_plugin_la_CPPFLAGS = $(AM_CPPFLAGS)
 libvaapi_plugin_la_CFLAGS = $(AM_CFLAGS) $(AVCODEC_CFLAGS)
-libvaapi_plugin_la_LIBADD = $(LIBVA_LIBS)
+libvaapi_plugin_la_LIBADD = $(LIBVA_LIBS) $(AVCODEC_LIBS)
 if HAVE_AVCODEC_VAAPI
 if HAVE_VAAPI_DRM
 codec_LTLIBRARIES += libvaapi_drm_plugin.la
diff --git a/modules/codec/avcodec/avcommon_compat.h b/modules/codec/avcodec/avcommon_compat.h
index ac02c06d2339..8ab6910f3250 100644
--- a/modules/codec/avcodec/avcommon_compat.h
+++ b/modules/codec/avcodec/avcommon_compat.h
@@ -84,6 +84,9 @@
 #ifndef FF_API_AVIO_WRITE_NONCONST // removed in ffmpeg 7
 # define FF_API_AVIO_WRITE_NONCONST (LIBAVFORMAT_VERSION_MAJOR < 61)
 #endif
+#ifndef FF_API_STRUCT_VAAPI_CONTEXT
+# define FF_API_STRUCT_VAAPI_CONTEXT (LIBAVCODEC_VERSION_MAJOR < 59)
+#endif
 
 #endif /* HAVE_LIBAVCODEC_AVCODEC_H */
 
diff --git a/modules/codec/avcodec/vaapi.c b/modules/codec/avcodec/vaapi.c
index c83269e43f30..e203baaf9ee2 100644
--- a/modules/codec/avcodec/vaapi.c
+++ b/modules/codec/avcodec/vaapi.c
@@ -42,12 +42,25 @@
 # include <va/va_drm.h>
 #endif
 #include <libavcodec/avcodec.h>
+#if FF_API_STRUCT_VAAPI_CONTEXT
 #include <libavcodec/vaapi.h>
+#else
+#include <libavutil/hwcontext_vaapi.h>
+#endif
 
 #include "avcodec.h"
 #include "va.h"
 #include "../../hw/vaapi/vlc_vaapi.h"
 
+#if !FF_API_STRUCT_VAAPI_CONTEXT
+struct vaapi_context
+{
+    VADisplay display;
+    VAConfigID config_id;
+    VAContextID context_id;
+};
+#endif
+
 struct vlc_va_sys_t
 {
     struct vlc_vaapi_instance *va_inst;
@@ -145,8 +158,10 @@ static void Delete(vlc_va_t *va, void **hwctx)
 
     (void) hwctx;
 
-    vlc_vaapi_DestroyContext(o, sys->hw_ctx.display, sys->hw_ctx.context_id);
-    vlc_vaapi_DestroyConfig(o, sys->hw_ctx.display, sys->hw_ctx.config_id);
+    if (sys->hw_ctx.context_id != VA_INVALID_ID)
+        vlc_vaapi_DestroyContext(o, sys->hw_ctx.display, sys->hw_ctx.context_id);
+    if (sys->hw_ctx.config_id != VA_INVALID_ID)
+        vlc_vaapi_DestroyConfig(o, sys->hw_ctx.display, sys->hw_ctx.config_id);
     vlc_vaapi_ReleaseInstance(sys->va_inst);
     free(sys);
 }
@@ -196,6 +211,7 @@ static int Create(vlc_va_t *va, AVCodecContext *ctx, const AVPixFmtDescriptor *d
     sys->hw_ctx.config_id = VA_INVALID_ID;
     sys->hw_ctx.context_id = VA_INVALID_ID;
 
+#if FF_API_STRUCT_VAAPI_CONTEXT
     sys->hw_ctx.config_id =
         vlc_vaapi_CreateConfigChecked(o, sys->hw_ctx.display, i_profile,
                                       VAEntrypointVLD, i_vlc_chroma);
@@ -211,6 +227,24 @@ static int Create(vlc_va_t *va, AVCodecContext *ctx, const AVPixFmtDescriptor *d
         goto error;
 
     ctx->hwaccel_context = &sys->hw_ctx;
+#else
+    AVBufferRef *hwdev_ref = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_VAAPI);
+    if (hwdev_ref == NULL)
+        goto error;
+
+    AVHWDeviceContext *hwdev_ctx = (void *) hwdev_ref->data;
+    AVVAAPIDeviceContext *vadev_ctx = hwdev_ctx->hwctx;
+    vadev_ctx->display = va_dpy;
+
+    if (av_hwdevice_ctx_init(hwdev_ref) < 0)
+    {
+        av_buffer_unref(&hwdev_ref);
+        goto error;
+    }
+
+    ctx->hw_device_ctx = hwdev_ref;
+#endif
+
     va->sys = sys;
     va->description = vaQueryVendorString(sys->hw_ctx.display);
     va->get = Get;
-- 
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