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@@ -0,0 +1,354 @@
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From 4739b0c97b3378bdaf737171777fe9a71a53eff1 Mon Sep 17 00:00:00 2001
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From: Neal Gompa <ngompa@fedoraproject.org>
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Date: Wed, 12 Oct 2022 09:41:27 -0400
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Subject: [PATCH] avcodec/openh264: Add the ability to dlopen() OpenH264
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We can't directly depend on OpenH264, but we can weakly link to it
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and gracefully expose the capability.
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Co-authored-by: Andreas Schneider <asn@cryptomilk.org>
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Co-authored-by: Neal Gompa <ngompa@fedoraproject.org>
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Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
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Signed-off-by: Neal Gompa <ngompa@fedoraproject.org>
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---
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configure | 3
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libavcodec/Makefile | 1
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libavcodec/libopenh264.c | 5 +
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libavcodec/libopenh264_dlopen.c | 147 ++++++++++++++++++++++++++++++++++++++++
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libavcodec/libopenh264_dlopen.h | 58 +++++++++++++++
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libavcodec/libopenh264dec.c | 8 ++
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libavcodec/libopenh264enc.c | 8 ++
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7 files changed, 230 insertions(+)
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create mode 100644 libavcodec/libopenh264_dlopen.c
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create mode 100644 libavcodec/libopenh264_dlopen.h
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Index: ffmpeg-7.1/configure
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===================================================================
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--- ffmpeg-7.1.orig/configure
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+++ ffmpeg-7.1/configure
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@@ -255,6 +255,7 @@ External library support:
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--enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
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--enable-libopencv enable video filtering via libopencv [no]
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--enable-libopenh264 enable H.264 encoding via OpenH264 [no]
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+ --enable-libopenh264-dlopen enable H.264 encoding via dlopen()'ed OpenH264 [no]
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--enable-libopenjpeg enable JPEG 2000 encoding via OpenJPEG [no]
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--enable-libopenmpt enable decoding tracked files via libopenmpt [no]
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--enable-libopenvino enable OpenVINO as a DNN module backend
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@@ -1939,6 +1940,7 @@ EXTERNAL_LIBRARY_LIST="
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libmysofa
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libopencv
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libopenh264
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+ libopenh264_dlopen
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libopenjpeg
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libopenmpt
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libopenvino
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@@ -6966,6 +6968,7 @@ enabled libopencv && { check_hea
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require libopencv opencv2/core/core_c.h cvCreateImageHeader -lopencv_core -lopencv_imgproc; } ||
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require_pkg_config libopencv opencv opencv/cxcore.h cvCreateImageHeader; }
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enabled libopenh264 && require_pkg_config libopenh264 "openh264 >= 1.3.0" wels/codec_api.h WelsGetCodecVersion
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+enabled libopenh264_dlopen && enable libopenh264 && add_cppflags "-I$(dirname $(readlink -f "$0"))/ffdlopenhdrs/include -DCONFIG_LIBOPENH264_DLOPEN=1"
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enabled libopenjpeg && { check_pkg_config libopenjpeg "libopenjp2 >= 2.1.0" openjpeg.h opj_version ||
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{ require_pkg_config libopenjpeg "libopenjp2 >= 2.1.0" openjpeg.h opj_version -DOPJ_STATIC && add_cppflags -DOPJ_STATIC; } }
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enabled libopenmpt && require_pkg_config libopenmpt "libopenmpt >= 0.2.6557" libopenmpt/libopenmpt.h openmpt_module_create -lstdc++ && append libopenmpt_extralibs "-lstdc++"
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Index: ffmpeg-7.1/libavcodec/Makefile
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===================================================================
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--- ffmpeg-7.1.orig/libavcodec/Makefile
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+++ ffmpeg-7.1/libavcodec/Makefile
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@@ -1138,6 +1138,7 @@ OBJS-$(CONFIG_LIBMP3LAME_ENCODER)
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OBJS-$(CONFIG_LIBOPENCORE_AMRNB_DECODER) += libopencore-amr.o
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OBJS-$(CONFIG_LIBOPENCORE_AMRNB_ENCODER) += libopencore-amr.o
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OBJS-$(CONFIG_LIBOPENCORE_AMRWB_DECODER) += libopencore-amr.o
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+OBJS-$(CONFIG_LIBOPENH264_DLOPEN) += libopenh264_dlopen.o
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OBJS-$(CONFIG_LIBOPENH264_DECODER) += libopenh264dec.o libopenh264.o
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OBJS-$(CONFIG_LIBOPENH264_ENCODER) += libopenh264enc.o libopenh264.o
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OBJS-$(CONFIG_LIBOPENJPEG_ENCODER) += libopenjpegenc.o
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Index: ffmpeg-7.1/libavcodec/libopenh264.c
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===================================================================
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--- ffmpeg-7.1.orig/libavcodec/libopenh264.c
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+++ ffmpeg-7.1/libavcodec/libopenh264.c
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@@ -20,8 +20,13 @@
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*/
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#include <string.h>
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+
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+#ifdef CONFIG_LIBOPENH264_DLOPEN
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+#include "libopenh264_dlopen.h"
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+#else
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#include <wels/codec_api.h>
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#include <wels/codec_ver.h>
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+#endif
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#include "libavutil/error.h"
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#include "libavutil/log.h"
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Index: ffmpeg-7.1/libavcodec/libopenh264_dlopen.c
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===================================================================
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--- /dev/null
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+++ ffmpeg-7.1/libavcodec/libopenh264_dlopen.c
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@@ -0,0 +1,147 @@
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+/*
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+ * OpenH264 dlopen code
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+ *
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+ * Copyright (C) 2022 Andreas Schneider <asn@cryptomilk.org>
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+ *
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+ * This file is part of FFmpeg.
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+ *
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+ * FFmpeg is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU Lesser General Public
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+ * License as published by the Free Software Foundation; either
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+ * version 2.1 of the License, or (at your option) any later version.
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+ *
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+ * FFmpeg is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * Lesser General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Lesser General Public
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+ * License along with FFmpeg; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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+ */
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+
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+#include <dlfcn.h>
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+
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+#include "libopenh264_dlopen.h"
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+
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+/*
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+ * The symbol binding makes sure we do not run into strict aliasing issues which
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+ * can lead into segfaults.
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+ */
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+typedef int (*__oh264_WelsCreateSVCEncoder)(ISVCEncoder **);
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+typedef void (*__oh264_WelsDestroySVCEncoder)(ISVCEncoder *);
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+typedef int (*__oh264_WelsGetDecoderCapability)(SDecoderCapability *);
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+typedef long (*__oh264_WelsCreateDecoder)(ISVCDecoder **);
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+typedef void (*__oh264_WelsDestroyDecoder)(ISVCDecoder *);
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+typedef OpenH264Version (*__oh264_WelsGetCodecVersion)(void);
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+typedef void (*__oh264_WelsGetCodecVersionEx)(OpenH264Version *);
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+
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+#define OH264_SYMBOL_ENTRY(i) \
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+ union { \
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+ __oh264_##i f; \
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+ void *obj; \
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+ } _oh264_##i
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+
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+struct oh264_symbols {
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+ OH264_SYMBOL_ENTRY(WelsCreateSVCEncoder);
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+ OH264_SYMBOL_ENTRY(WelsDestroySVCEncoder);
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+ OH264_SYMBOL_ENTRY(WelsGetDecoderCapability);
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+ OH264_SYMBOL_ENTRY(WelsCreateDecoder);
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+ OH264_SYMBOL_ENTRY(WelsDestroyDecoder);
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+ OH264_SYMBOL_ENTRY(WelsGetCodecVersion);
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+ OH264_SYMBOL_ENTRY(WelsGetCodecVersionEx);
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+};
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+
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+/* Symbols are bound by loadLibOpenH264() */
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+static struct oh264_symbols openh264_symbols;
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+
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+int oh264_WelsCreateSVCEncoder(ISVCEncoder **ppEncoder) {
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+ return openh264_symbols._oh264_WelsCreateSVCEncoder.f(ppEncoder);
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+}
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+
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+void oh264_WelsDestroySVCEncoder(ISVCEncoder *pEncoder) {
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+ return openh264_symbols._oh264_WelsDestroySVCEncoder.f(pEncoder);
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+}
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+
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+int oh264_WelsGetDecoderCapability(SDecoderCapability *pDecCapability) {
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+ return openh264_symbols._oh264_WelsGetDecoderCapability.f(pDecCapability);
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+}
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+
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+long oh264_WelsCreateDecoder(ISVCDecoder **ppDecoder) {
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+ return openh264_symbols._oh264_WelsCreateDecoder.f(ppDecoder);
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+}
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+
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+void oh264_WelsDestroyDecoder(ISVCDecoder *pDecoder) {
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+ return openh264_symbols._oh264_WelsDestroyDecoder.f(pDecoder);
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+}
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+
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+OpenH264Version oh264_WelsGetCodecVersion(void) {
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+ return openh264_symbols._oh264_WelsGetCodecVersion.f();
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+}
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+
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+void oh264_WelsGetCodecVersionEx(OpenH264Version *pVersion) {
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+ openh264_symbols._oh264_WelsGetCodecVersionEx.f(pVersion);
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+}
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+
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+static void *_oh264_bind_symbol(AVCodecContext *avctx,
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+ void *handle,
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+ const char *sym_name) {
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+ void *sym = NULL;
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+
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+ sym = dlsym(handle, sym_name);
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+ if (sym == NULL) {
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+ const char *err = dlerror();
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+ av_log(avctx,
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+ AV_LOG_WARNING,
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+ "%s: Failed to bind %s\n",
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+ err,
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+ sym_name);
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+ return NULL;
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+ }
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+
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+ return sym;
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+}
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+
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+#define oh264_bind_symbol(avctx, handle, sym_name) \
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+ if (openh264_symbols._oh264_##sym_name.obj == NULL) { \
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+ openh264_symbols._oh264_##sym_name.obj = _oh264_bind_symbol(avctx, handle, #sym_name); \
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+ if (openh264_symbols._oh264_##sym_name.obj == NULL) { \
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+ return 1; \
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+ } \
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+ }
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+
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+int loadLibOpenH264(AVCodecContext *avctx) {
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+ static bool initialized = false;
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+ void *libopenh264 = NULL;
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+ const char *err = NULL;
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+
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+ if (initialized) {
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+ return 0;
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+ }
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+
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+#define OPENH264_LIB "libopenh264.so.7"
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+ libopenh264 = dlopen(OPENH264_LIB, RTLD_LAZY);
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+ err = dlerror();
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+ if (err != NULL) {
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+ av_log(avctx, AV_LOG_WARNING,
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+ "%s: %s is missing, openh264 support will be disabled\n", err,
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+ OPENH264_LIB);
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+
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+ if (libopenh264 != NULL) {
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+ dlclose(libopenh264);
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+ }
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+ return 1;
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+ }
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+
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+ oh264_bind_symbol(avctx, libopenh264, WelsCreateSVCEncoder);
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+ oh264_bind_symbol(avctx, libopenh264, WelsDestroySVCEncoder);
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+ oh264_bind_symbol(avctx, libopenh264, WelsGetDecoderCapability);
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+ oh264_bind_symbol(avctx, libopenh264, WelsCreateDecoder);
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+ oh264_bind_symbol(avctx, libopenh264, WelsDestroyDecoder);
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+ oh264_bind_symbol(avctx, libopenh264, WelsGetCodecVersion);
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+ oh264_bind_symbol(avctx, libopenh264, WelsGetCodecVersionEx);
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+
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+ initialized = true;
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+
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+ return 0;
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+}
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Index: ffmpeg-7.1/libavcodec/libopenh264_dlopen.h
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===================================================================
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--- /dev/null
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+++ ffmpeg-7.1/libavcodec/libopenh264_dlopen.h
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@@ -0,0 +1,58 @@
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+/*
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+ * OpenH264 dlopen code
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+ *
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+ * Copyright (C) 2022 Andreas Schneider <asn@cryptomilk.org>
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+ *
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+ * This file is part of FFmpeg.
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+ *
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+ * FFmpeg is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU Lesser General Public
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+ * License as published by the Free Software Foundation; either
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+ * version 2.1 of the License, or (at your option) any later version.
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+ *
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+ * FFmpeg is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * Lesser General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Lesser General Public
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+ * License along with FFmpeg; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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+ */
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+
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+#ifndef HAVE_LIBOPENH264_DLOPEN_H
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+#define HAVE_LIBOPENH264_DLOPEN_H
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+
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+#ifdef CONFIG_LIBOPENH264_DLOPEN
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+
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+#include <wels/codec_api.h>
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+#include <wels/codec_ver.h>
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+
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+#include "avcodec.h"
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+
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+int oh264_WelsCreateSVCEncoder(ISVCEncoder **ppEncoder);
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+#define WelsCreateSVCEncoder oh264_WelsCreateSVCEncoder
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+
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+void oh264_WelsDestroySVCEncoder(ISVCEncoder *pEncoder);
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+#define WelsDestroySVCEncoder oh264_WelsDestroySVCEncoder
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+
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+int oh264_WelsGetDecoderCapability(SDecoderCapability *pDecCapability);
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+#define WelsGetDecoderCapability oh264_WelsGetDecoderCapability
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+
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+long oh264_WelsCreateDecoder(ISVCDecoder **ppDecoder);
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+#define WelsCreateDecoder oh264_WelsCreateDecoder
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+
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|
|
|
|
+void oh264_WelsDestroyDecoder(ISVCDecoder *pDecoder);
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|
|
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|
+#define WelsDestroyDecoder oh264_WelsDestroyDecoder
|
|
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+
|
|
|
|
|
+OpenH264Version oh264_WelsGetCodecVersion(void);
|
|
|
|
|
+#define WelsGetCodecVersion oh264_WelsGetCodecVersion
|
|
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|
|
+
|
|
|
|
|
+void oh264_WelsGetCodecVersionEx(OpenH264Version *pVersion);
|
|
|
|
|
+#define WelsGetCodecVersionEx oh264_WelsGetCodecVersionEx
|
|
|
|
|
+
|
|
|
|
|
+int loadLibOpenH264(AVCodecContext *avctx);
|
|
|
|
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+
|
|
|
|
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+#endif /* CONFIG_LIBOPENH264_DLOPEN */
|
|
|
|
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+
|
|
|
|
|
+#endif /* HAVE_LIBOPENH264_DLOPEN_H */
|
|
|
|
|
Index: ffmpeg-7.1/libavcodec/libopenh264dec.c
|
|
|
|
|
===================================================================
|
|
|
|
|
--- ffmpeg-7.1.orig/libavcodec/libopenh264dec.c
|
|
|
|
|
+++ ffmpeg-7.1/libavcodec/libopenh264dec.c
|
|
|
|
|
@@ -19,8 +19,12 @@
|
|
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
+#ifdef CONFIG_LIBOPENH264_DLOPEN
|
|
|
|
|
+#include "libopenh264_dlopen.h"
|
|
|
|
|
+#else
|
|
|
|
|
#include <wels/codec_api.h>
|
|
|
|
|
#include <wels/codec_ver.h>
|
|
|
|
|
+#endif
|
|
|
|
|
|
|
|
|
|
#include "libavutil/common.h"
|
|
|
|
|
#include "libavutil/fifo.h"
|
|
|
|
|
@@ -55,6 +59,10 @@ static av_cold int svc_decode_init(AVCod
|
|
|
|
|
int log_level;
|
|
|
|
|
WelsTraceCallback callback_function;
|
|
|
|
|
|
|
|
|
|
+#ifdef CONFIG_LIBOPENH264_DLOPEN
|
|
|
|
|
+ if (loadLibOpenH264(avctx))
|
|
|
|
|
+ return AVERROR_DECODER_NOT_FOUND;
|
|
|
|
|
+#endif
|
|
|
|
|
if (WelsCreateDecoder(&s->decoder)) {
|
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Unable to create decoder\n");
|
|
|
|
|
return AVERROR_UNKNOWN;
|
|
|
|
|
Index: ffmpeg-7.1/libavcodec/libopenh264enc.c
|
|
|
|
|
===================================================================
|
|
|
|
|
--- ffmpeg-7.1.orig/libavcodec/libopenh264enc.c
|
|
|
|
|
+++ ffmpeg-7.1/libavcodec/libopenh264enc.c
|
|
|
|
|
@@ -19,8 +19,12 @@
|
|
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
+#ifdef CONFIG_LIBOPENH264_DLOPEN
|
|
|
|
|
+#include "libopenh264_dlopen.h"
|
|
|
|
|
+#else
|
|
|
|
|
#include <wels/codec_api.h>
|
|
|
|
|
#include <wels/codec_ver.h>
|
|
|
|
|
+#endif
|
|
|
|
|
|
|
|
|
|
#include "libavutil/attributes.h"
|
|
|
|
|
#include "libavutil/common.h"
|
|
|
|
|
@@ -114,6 +118,10 @@ static av_cold int svc_encode_init(AVCod
|
|
|
|
|
WelsTraceCallback callback_function;
|
|
|
|
|
AVCPBProperties *props;
|
|
|
|
|
|
|
|
|
|
+#ifdef CONFIG_LIBOPENH264_DLOPEN
|
|
|
|
|
+ if (loadLibOpenH264(avctx))
|
|
|
|
|
+ return AVERROR_ENCODER_NOT_FOUND;
|
|
|
|
|
+#endif
|
|
|
|
|
if (WelsCreateSVCEncoder(&s->encoder)) {
|
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Unable to create encoder\n");
|
|
|
|
|
return AVERROR_UNKNOWN;
|
