File 0002-tg_owt-h264-dlopen.patch of Package telegram-desktop
diff -Pdpru tg_owt-git20241202.orig/cmake/external.cmake tg_owt-git20241202/cmake/external.cmake
--- tg_owt-git20241202.orig/cmake/external.cmake 2025-03-13 07:44:44.829704715 +0300
+++ tg_owt-git20241202/cmake/external.cmake 2025-03-13 12:13:12.614840773 +0300
@@ -129,7 +129,7 @@ endfunction()
# libopenh264
set(TG_OWT_OPENH264_INCLUDE_PATH "" CACHE STRING "Include path for openh264.")
-function(link_libopenh264 target_name)
+function(link_libopenh264 target_name with_dlopen)
if (TG_OWT_PACKAGED_BUILD)
find_package(PkgConfig REQUIRED)
pkg_check_modules(LIBOPENH264 openh264)
@@ -148,6 +148,10 @@ function(link_libopenh264 target_name)
${TG_OWT_OPENH264_INCLUDE_PATH}
)
endif()
+ if (with_dlopen)
+ target_compile_definitions(${target_name} PRIVATE -DWEBRTC_USE_H264_DLOPEN)
+ target_sources(${target_name} PRIVATE ${CMAKE_CURRENT_LIST_DIR}/src/modules/video_coding/codecs/h264/h264_dlopen.cc)
+ endif()
endfunction()
# libSRTP
diff -Pdpru tg_owt-git20241202.orig/CMakeLists.txt tg_owt-git20241202/CMakeLists.txt
--- tg_owt-git20241202.orig/CMakeLists.txt 2025-03-13 07:44:44.828704725 +0300
+++ tg_owt-git20241202/CMakeLists.txt 2025-03-13 12:10:06.920730666 +0300
@@ -24,6 +24,7 @@ cmake_dependent_option(TG_OWT_USE_X11 "U
cmake_dependent_option(TG_OWT_USE_PIPEWIRE "Use pipewire for desktop capture." ON "UNIX; NOT APPLE" OFF)
cmake_dependent_option(TG_OWT_DLOPEN_PIPEWIRE "dlopen pipewire for desktop capture." ${not_packaged_build} TG_OWT_USE_PIPEWIRE OFF)
option(TG_OWT_BUILD_AUDIO_BACKENDS "Build webrtc audio backends." OFF)
+option(TG_OWT_DLOPEN_H264 "dlopen H264 for video coding." OFF)
if (BUILD_SHARED_LIBS)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
@@ -150,7 +151,7 @@ link_openssl(tg_owt)
link_ffmpeg(tg_owt)
link_opus(tg_owt)
link_libabsl(tg_owt)
-link_libopenh264(tg_owt)
+link_libopenh264(tg_owt ${TG_OWT_DLOPEN_H264})
link_libsrtp(tg_owt)
link_libvpx(tg_owt)
link_crc32c(tg_owt)
diff -Pdpru tg_owt-git20241202.orig/src/modules/video_coding/codecs/h264/h264_dlopen.cc tg_owt-git20241202/src/modules/video_coding/codecs/h264/h264_dlopen.cc
--- tg_owt-git20241202.orig/src/modules/video_coding/codecs/h264/h264_dlopen.cc 1970-01-01 03:00:00.000000000 +0300
+++ tg_owt-git20241202/src/modules/video_coding/codecs/h264/h264_dlopen.cc 2025-03-13 12:19:33.944074704 +0300
@@ -0,0 +1,128 @@
+/*
+ * OpenH264 dlopen code
+ *
+ * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <dlfcn.h>
+#include <cstddef>
+
+#include "h264_dlopen.h"
+
+/*
+ * The symbol binding makes sure we do not run into strict aliasing issues which
+ * can lead into segfaults.
+ */
+typedef int (*__oh264_WelsCreateSVCEncoder)(ISVCEncoder **);
+typedef void (*__oh264_WelsDestroySVCEncoder)(ISVCEncoder *);
+typedef int (*__oh264_WelsGetDecoderCapability)(SDecoderCapability *);
+typedef long (*__oh264_WelsCreateDecoder)(ISVCDecoder **);
+typedef void (*__oh264_WelsDestroyDecoder)(ISVCDecoder *);
+typedef OpenH264Version (*__oh264_WelsGetCodecVersion)(void);
+typedef void (*__oh264_WelsGetCodecVersionEx)(OpenH264Version *);
+
+#define OH264_SYMBOL_ENTRY(i) \
+ union { \
+ __oh264_##i f; \
+ void *obj; \
+ } _oh264_##i
+
+struct oh264_symbols {
+ OH264_SYMBOL_ENTRY(WelsCreateSVCEncoder);
+ OH264_SYMBOL_ENTRY(WelsDestroySVCEncoder);
+ OH264_SYMBOL_ENTRY(WelsGetDecoderCapability);
+ OH264_SYMBOL_ENTRY(WelsCreateDecoder);
+ OH264_SYMBOL_ENTRY(WelsDestroyDecoder);
+ OH264_SYMBOL_ENTRY(WelsGetCodecVersion);
+ OH264_SYMBOL_ENTRY(WelsGetCodecVersionEx);
+};
+
+/* Symbols are bound by loadLibOpenH264() */
+static struct oh264_symbols openh264_symbols;
+
+int oh264_WelsCreateSVCEncoder(ISVCEncoder **ppEncoder) {
+ return openh264_symbols._oh264_WelsCreateSVCEncoder.f(ppEncoder);
+}
+
+void oh264_WelsDestroySVCEncoder(ISVCEncoder *pEncoder) {
+ return openh264_symbols._oh264_WelsDestroySVCEncoder.f(pEncoder);
+}
+
+int oh264_WelsGetDecoderCapability(SDecoderCapability *pDecCapability) {
+ return openh264_symbols._oh264_WelsGetDecoderCapability.f(pDecCapability);
+}
+
+long oh264_WelsCreateDecoder(ISVCDecoder **ppDecoder) {
+ return openh264_symbols._oh264_WelsCreateDecoder.f(ppDecoder);
+}
+
+void oh264_WelsDestroyDecoder(ISVCDecoder *pDecoder) {
+ return openh264_symbols._oh264_WelsDestroyDecoder.f(pDecoder);
+}
+
+OpenH264Version oh264_WelsGetCodecVersion(void) {
+ return openh264_symbols._oh264_WelsGetCodecVersion.f();
+}
+
+void oh264_WelsGetCodecVersionEx(OpenH264Version *pVersion) {
+ openh264_symbols._oh264_WelsGetCodecVersionEx.f(pVersion);
+}
+
+static void *_oh264_bind_symbol(void *handle,
+ const char *sym_name) {
+ void *sym = NULL;
+
+ sym = dlsym(handle, sym_name);
+ if (sym == NULL) {
+ const char *err = dlerror();
+ return NULL;
+ }
+
+ return sym;
+}
+
+#define oh264_bind_symbol(handle, sym_name) \
+ if (openh264_symbols._oh264_##sym_name.obj == NULL) { \
+ openh264_symbols._oh264_##sym_name.obj = _oh264_bind_symbol(handle, #sym_name); \
+ if (openh264_symbols._oh264_##sym_name.obj == NULL) { \
+ return 1; \
+ } \
+ }
+
+int loadLibOpenH264(void) {
+ static bool initialized = false;
+ void *libopenh264 = NULL;
+ const char *err = NULL;
+
+ if (initialized) {
+ return 0;
+ }
+
+#define OPENH264_LIB "libopenh264.so.7"
+ libopenh264 = dlopen(OPENH264_LIB, RTLD_LAZY);
+ err = dlerror();
+ if (err != NULL) {
+ if (libopenh264 != NULL) {
+ dlclose(libopenh264);
+ }
+ return 1;
+ }
+
+ oh264_bind_symbol(libopenh264, WelsCreateSVCEncoder);
+ oh264_bind_symbol(libopenh264, WelsDestroySVCEncoder);
+ oh264_bind_symbol(libopenh264, WelsGetDecoderCapability);
+ oh264_bind_symbol(libopenh264, WelsCreateDecoder);
+ oh264_bind_symbol(libopenh264, WelsDestroyDecoder);
+ oh264_bind_symbol(libopenh264, WelsGetCodecVersion);
+ oh264_bind_symbol(libopenh264, WelsGetCodecVersionEx);
+
+ initialized = true;
+
+ return 0;
+}
diff -Pdpru tg_owt-git20241202.orig/src/modules/video_coding/codecs/h264/h264_dlopen.h tg_owt-git20241202/src/modules/video_coding/codecs/h264/h264_dlopen.h
--- tg_owt-git20241202.orig/src/modules/video_coding/codecs/h264/h264_dlopen.h 1970-01-01 03:00:00.000000000 +0300
+++ tg_owt-git20241202/src/modules/video_coding/codecs/h264/h264_dlopen.h 2025-03-13 12:19:19.307509891 +0300
@@ -0,0 +1,46 @@
+/*
+ * OpenH264 dlopen code
+ *
+ * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef HAVE_LIBOPENH264_DLOPEN_H
+#define HAVE_LIBOPENH264_DLOPEN_H
+
+#ifdef WEBRTC_USE_H264_DLOPEN
+
+#include <wels/codec_api.h>
+#include <wels/codec_ver.h>
+
+int oh264_WelsCreateSVCEncoder(ISVCEncoder **ppEncoder);
+#define WelsCreateSVCEncoder oh264_WelsCreateSVCEncoder
+
+void oh264_WelsDestroySVCEncoder(ISVCEncoder *pEncoder);
+#define WelsDestroySVCEncoder oh264_WelsDestroySVCEncoder
+
+int oh264_WelsGetDecoderCapability(SDecoderCapability *pDecCapability);
+#define WelsGetDecoderCapability oh264_WelsGetDecoderCapability
+
+long oh264_WelsCreateDecoder(ISVCDecoder **ppDecoder);
+#define WelsCreateDecoder oh264_WelsCreateDecoder
+
+void oh264_WelsDestroyDecoder(ISVCDecoder *pDecoder);
+#define WelsDestroyDecoder oh264_WelsDestroyDecoder
+
+OpenH264Version oh264_WelsGetCodecVersion(void);
+#define WelsGetCodecVersion oh264_WelsGetCodecVersion
+
+void oh264_WelsGetCodecVersionEx(OpenH264Version *pVersion);
+#define WelsGetCodecVersionEx oh264_WelsGetCodecVersionEx
+
+int loadLibOpenH264(void);
+
+#endif /* WEBRTC_USE_H264_DLOPEN */
+
+#endif /* HAVE_LIBOPENH264_DLOPEN_H */
diff -Pdpru tg_owt-git20241202.orig/src/modules/video_coding/codecs/h264/h264_encoder_impl.cc tg_owt-git20241202/src/modules/video_coding/codecs/h264/h264_encoder_impl.cc
--- tg_owt-git20241202.orig/src/modules/video_coding/codecs/h264/h264_encoder_impl.cc 2025-03-13 07:44:46.223689952 +0300
+++ tg_owt-git20241202/src/modules/video_coding/codecs/h264/h264_encoder_impl.cc 2025-03-13 12:22:25.418358239 +0300
@@ -218,6 +218,12 @@ int32_t H264EncoderImpl::InitEncode(cons
return release_ret;
}
+ #ifdef WEBRTC_USE_H264_DLOPEN
+ if (loadLibOpenH264()) {
+ return WEBRTC_VIDEO_CODEC_ERROR;
+ }
+ #endif
+
int number_of_streams = SimulcastUtility::NumberOfSimulcastStreams(*inst);
bool doing_simulcast = (number_of_streams > 1);
diff -Pdpru tg_owt-git20241202.orig/src/modules/video_coding/codecs/h264/h264_encoder_impl.h tg_owt-git20241202/src/modules/video_coding/codecs/h264/h264_encoder_impl.h
--- tg_owt-git20241202.orig/src/modules/video_coding/codecs/h264/h264_encoder_impl.h 2025-03-13 07:44:46.223689952 +0300
+++ tg_owt-git20241202/src/modules/video_coding/codecs/h264/h264_encoder_impl.h 2025-03-13 12:24:51.034735385 +0300
@@ -30,7 +30,12 @@
#include "modules/video_coding/codecs/h264/include/h264.h"
#include "modules/video_coding/svc/scalable_video_controller.h"
#include "modules/video_coding/utility/quality_scaler.h"
+
+#ifdef WEBRTC_USE_H264_DLOPEN
+#include "h264_dlopen.h"
+#else
#include <wels/codec_app_def.h>
+#endif
class ISVCEncoder;
