File ffmpeg-4.2-dlopen-fdk_aac.patch of Package ffmpeg-4

Index: ffmpeg-4.2.1/configure
===================================================================
--- ffmpeg-4.2.1.orig/configure
+++ ffmpeg-4.2.1/configure
@@ -232,6 +232,7 @@ External library support:
   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
                            and libraw1394 [no]
   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
+  --enable-libfdk-aac-dlopen enable AAC de/encoding via dlopen()'ed libfdk-aac [no]
   --enable-libflite        enable flite (voice synthesis) support via libflite [no]
   --enable-libfontconfig   enable libfontconfig, useful for drawtext filter [no]
   --enable-libfreetype     enable libfreetype, needed for drawtext filter [no]
@@ -1724,6 +1725,7 @@ EXTERNAL_LIBRARY_GPL_LIST="
 EXTERNAL_LIBRARY_NONFREE_LIST="
     decklink
     libfdk_aac
+    libfdk_aac_dlopen
     openssl
     libtls
 "
@@ -6203,6 +6205,7 @@ enabled libdrm            && require_pkg
 enabled libfdk_aac        && { check_pkg_config libfdk_aac fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen ||
                                { require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac &&
                                  warn "using libfdk without pkg-config"; } }
+enabled libfdk_aac_dlopen && enable libfdk_aac && add_cppflags "-I/usr/include/fdk-aac"
 flite_extralibs="-lflite_cmu_time_awb -lflite_cmu_us_awb -lflite_cmu_us_kal -lflite_cmu_us_kal16 -lflite_cmu_us_rms -lflite_cmu_us_slt -lflite_usenglish -lflite_cmulex -lflite"
 enabled libflite          && require libflite "flite/flite.h" flite_init $flite_extralibs
 enabled fontconfig        && enable libfontconfig
Index: ffmpeg-4.2.1/libavcodec/dlopen.h
===================================================================
--- /dev/null
+++ ffmpeg-4.2.1/libavcodec/dlopen.h
@@ -0,0 +1,12 @@
+#ifndef LOCALINC_DLOPEN_H
+#define LOCALINC_DLOPEN_H
+#include <dlfcn.h>
+#define num2str(x) str(x)
+#define str(x) #x
+
+#define dl_sym(func, args, lib) \
+	dl_##func = args dlsym(lib, #func); \
+	if ((err = dlerror())) \
+		goto error;
+
+#endif
Index: ffmpeg-4.2.1/libavcodec/libfdk-aacdec.c
===================================================================
--- ffmpeg-4.2.1.orig/libavcodec/libfdk-aacdec.c
+++ ffmpeg-4.2.1/libavcodec/libfdk-aacdec.c
@@ -37,6 +37,54 @@
 #define AAC_PCM_MAX_OUTPUT_CHANNELS AAC_PCM_OUTPUT_CHANNELS
 #endif
 
+#ifdef CONFIG_LIBFDK_AAC_DLOPEN
+#include "dlopen.h"
+AAC_DECODER_ERROR (*dl_aacDecoder_AncDataInit)(HANDLE_AACDECODER, UCHAR*, int);
+HANDLE_AACDECODER (*dl_aacDecoder_Open)(TRANSPORT_TYPE, UINT);
+AAC_DECODER_ERROR (*dl_aacDecoder_Fill)(HANDLE_AACDECODER, UCHAR**, const UINT*, UINT*);
+AAC_DECODER_ERROR (*dl_aacDecoder_ConfigRaw)(HANDLE_AACDECODER, UCHAR **, const UINT*);
+AAC_DECODER_ERROR (*dl_aacDecoder_SetParam)(const HANDLE_AACDECODER, const AACDEC_PARAM, const INT);
+AAC_DECODER_ERROR (*dl_aacDecoder_DecodeFrame)(HANDLE_AACDECODER, INT_PCM*, const INT, const UINT);
+CStreamInfo* (*dl_aacDecoder_GetStreamInfo)(HANDLE_AACDECODER);
+void (*dl_aacDecoder_Close)(HANDLE_AACDECODER);
+#define aacDecoder_AncDataInit dl_aacDecoder_AncDataInit
+#define aacDecoder_Open dl_aacDecoder_Open
+#define aacDecoder_Fill dl_aacDecoder_Fill
+#define aacDecoder_ConfigRaw dl_aacDecoder_ConfigRaw
+#define aacDecoder_SetParam dl_aacDecoder_SetParam
+#define aacDecoder_DecodeFrame dl_aacDecoder_DecodeFrame
+#define aacDecoder_GetStreamInfo dl_aacDecoder_GetStreamInfo
+#define aacDecoder_Close dl_aacDecoder_Close
+#define FDKAAC_LIB "libfdk-aac.so.2"
+static int loadLibFdkAac(AVCodecContext *avctx);
+static int loadLibFdkAac(AVCodecContext *avctx) {
+	void *libfdkaac = NULL;
+	const char *err = NULL;
+	
+	libfdkaac = dlopen(FDKAAC_LIB, RTLD_LAZY);
+	if(err = dlerror()) {
+		av_log(avctx, AV_LOG_FATAL, "%s\n%s is missing, libfdk-aac support will be disabled\n", err, FDKAAC_LIB);
+		if(libfdkaac)
+			dlclose(libfdkaac);
+		return 1;
+	}
+	dl_sym(aacDecoder_AncDataInit, (AAC_DECODER_ERROR (*)(HANDLE_AACDECODER, UCHAR*, int)), libfdkaac);
+	dl_sym(aacDecoder_Open, (HANDLE_AACDECODER (*)(TRANSPORT_TYPE, UINT)), libfdkaac);
+	dl_sym(aacDecoder_Fill, (AAC_DECODER_ERROR (*)(HANDLE_AACDECODER, UCHAR**, const UINT*, UINT*)), libfdkaac);
+	dl_sym(aacDecoder_ConfigRaw, (AAC_DECODER_ERROR (*)(HANDLE_AACDECODER, UCHAR**, const UINT*)), libfdkaac);
+	dl_sym(aacDecoder_SetParam, (AAC_DECODER_ERROR (*)(const HANDLE_AACDECODER, const AACDEC_PARAM, const INT)), libfdkaac);
+	dl_sym(aacDecoder_DecodeFrame, (AAC_DECODER_ERROR (*)(HANDLE_AACDECODER, INT_PCM*, const INT, const UINT)), libfdkaac);
+	dl_sym(aacDecoder_GetStreamInfo, (CStreamInfo* (*)(HANDLE_AACDECODER)), libfdkaac);
+	dl_sym(aacDecoder_Close, (void (*)(HANDLE_AACDECODER)), libfdkaac);
+	return 0;
+error:
+	av_log(avctx, AV_LOG_FATAL, "libfdk-aac: Missing symbols in %s: %s\n"
+		"libfdk-aac support disabled\n", FDKAAC_LIB, err);
+	dlclose(libfdkaac);
+	return 1;
+}
+#endif
+
 enum ConcealMethod {
     CONCEAL_METHOD_SPECTRAL_MUTING      =  0,
     CONCEAL_METHOD_NOISE_SUBSTITUTION   =  1,
@@ -224,6 +272,11 @@ static av_cold int fdk_aac_decode_init(A
     FDKAACDecContext *s = avctx->priv_data;
     AAC_DECODER_ERROR err;
 
+#ifdef CONFIG_LIBFDK_AAC_DLOPEN
+    if (loadLibFdkAac(avctx))
+        return -1;
+#endif
+
     s->handle = aacDecoder_Open(avctx->extradata_size ? TT_MP4_RAW : TT_MP4_ADTS, 1);
     if (!s->handle) {
         av_log(avctx, AV_LOG_ERROR, "Error opening decoder\n");
Index: ffmpeg-4.2.1/libavcodec/libfdk-aacenc.c
===================================================================
--- ffmpeg-4.2.1.orig/libavcodec/libfdk-aacenc.c
+++ ffmpeg-4.2.1/libavcodec/libfdk-aacenc.c
@@ -34,6 +34,48 @@
 #define FDKENC_VER_AT_LEAST(vl0, vl1) 0
 #endif
 
+#ifdef CONFIG_LIBFDK_AAC_DLOPEN
+#include "dlopen.h"
+#include <fdk-aac/aacdecoder_lib.h>
+AACENC_ERROR (*dl_aacEncOpen)(HANDLE_AACENCODER*, const UINT, const UINT);
+AACENC_ERROR (*dl_aacEncoder_SetParam)(const HANDLE_AACENCODER, const AACENC_PARAM, const UINT);
+AACENC_ERROR (*dl_aacEncEncode)(const HANDLE_AACENCODER, const AACENC_BufDesc*, const AACENC_BufDesc*, const AACENC_InArgs*, AACENC_OutArgs*);
+AACENC_ERROR (*dl_aacEncInfo)(const HANDLE_AACENCODER, AACENC_InfoStruct*);
+AACENC_ERROR (*dl_aacEncClose)(HANDLE_AACENCODER*);
+
+#define aacEncOpen dl_aacEncOpen
+#define aacEncoder_SetParam dl_aacEncoder_SetParam
+#define aacEncEncode dl_aacEncEncode
+#define aacEncInfo dl_aacEncInfo
+#define aacEncClose dl_aacEncClose
+#define FDKAAC_LIB "libfdk-aac.so.2"
+
+static int loadLibFdkAac(AVCodecContext *avctx);
+static int loadLibFdkAac(AVCodecContext *avctx) {
+	void *libfdkaac = NULL;
+	const char *err = NULL;
+	
+	libfdkaac = dlopen(FDKAAC_LIB, RTLD_LAZY);
+	if(err = dlerror()) {
+		av_log(avctx, AV_LOG_FATAL, "%s\n%s is missing, libfdk-aac support will be disabled\n", err, FDKAAC_LIB);
+		if(libfdkaac)
+			dlclose(libfdkaac);
+		return 1;
+	}
+	dl_sym(aacEncOpen, (AACENC_ERROR (*)(HANDLE_AACENCODER*, const UINT, const UINT)), libfdkaac);
+	dl_sym(aacEncoder_SetParam, (AACENC_ERROR (*)(const HANDLE_AACENCODER, const AACENC_PARAM, const UINT)), libfdkaac);
+	dl_sym(aacEncEncode, (AACENC_ERROR (*)(const HANDLE_AACENCODER, const AACENC_BufDesc*, const AACENC_BufDesc*, const AACENC_InArgs*, AACENC_OutArgs*)), libfdkaac);
+	dl_sym(aacEncInfo, (AACENC_ERROR (*)(const HANDLE_AACENCODER, AACENC_InfoStruct*)), libfdkaac);
+	dl_sym(aacEncClose, (AACENC_ERROR (*)(HANDLE_AACENCODER*)), libfdkaac);
+	return 0;
+error:
+	av_log(avctx, AV_LOG_FATAL, "libfdk-aac: Missing symbols in %s: %s\n"
+		"libfdk-aac support disabled\n", FDKAAC_LIB, err);
+	dlclose(libfdkaac);
+	return 1;
+}
+#endif
+
 typedef struct AACContext {
     const AVClass *class;
     HANDLE_AACENCODER handle;
@@ -126,6 +168,11 @@ static av_cold int aac_encode_init(AVCod
     int aot = FF_PROFILE_AAC_LOW + 1;
     int sce = 0, cpe = 0;
 
+#ifdef CONFIG_LIBFDK_AAC_DLOPEN
+    if (loadLibFdkAac(avctx))
+        return -1;
+#endif
+
     if ((err = aacEncOpen(&s->handle, 0, avctx->channels)) != AACENC_OK) {
         av_log(avctx, AV_LOG_ERROR, "Unable to open the encoder: %s\n",
                aac_get_error(err));
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