Introduced preamp, speed and pitch manipulator

Makefile

@@ -69,7 +69,7 @@ CXXFLAGS	:= $(CFLAGS) -fno-exceptions -std=gnu++14
 ASFLAGS	:= $(ARCH)
 LDFLAGS	=	-specs=3dsx.specs $(ARCH) -Wl,-Map,$(notdir $*.map)
 
-LIBS	:= -lswresample -lavformat -lswscale -lavcodec -lavutil -lcurl -lmbedtls -lmbedx509 -lmbedcrypto -lz  -lcitro2d -lcitro3d -lctru -lm
+LIBS	:= -lavfilter -lswresample -lavformat -lswscale -lavcodec -lavutil -lcurl -lmbedtls -lmbedx509 -lmbedcrypto -lz  -lcitro2d -lcitro3d -lctru -lm
 
 #---------------------------------------------------------------------------------
 # list of directories containing libraries, this must be the top level containing

include/headers.hpp

@@ -6,6 +6,7 @@
 #include <malloc.h>
 #include <string>
 #include <unistd.h>
+#include <cmath>
 #include <limits>
 #include "citro2d.h"
 

include/network/network_decoder.hpp

@@ -8,7 +8,12 @@
 extern "C" {
 #include "libavcodec/avcodec.h"
 #include "libavformat/avformat.h"
+#include "libavfilter/avfilter.h"
+#include "libavfilter/buffersrc.h"
+#include "libavfilter/buffersink.h"
 #include "libswresample/swresample.h"
+#include "libavutil/opt.h"
+#include "libavutil/log.h"
 }
 
 namespace network_decoder_ {
@@ -99,6 +104,17 @@ public :
 	Result_with_string reinit();
 	double get_duration();
 };
+class NetworkDecoderFilterData {
+public :
+	AVFilterGraph *audio_filter_graph = NULL;
+	AVFilterContext *audio_filter_src = NULL;
+	AVFilterContext *audio_filter_sink = NULL;
+	AVFrame *output_frame;
+
+	void deinit();
+	Result_with_string init(AVCodecContext *audio_context, double volume, double tempo, double pitch);
+	Result_with_string process_audio_frame(AVFrame *input); // filtered frame goes to output_frame. It should NOT be freed
+};
 
 class NetworkDecoder {
 private :
@@ -137,6 +153,9 @@ public :
 	volatile bool need_reinit = false;
 	volatile bool ready = false;
 	double timestamp_offset = 0;
+	NetworkDecoderFilterData filter;
+
+	AVCodecContext *get_audio_context() { return decoder_context[AUDIO]; }
 	const char *get_network_waiting_status() {
 		if (network_stream[VIDEO] && network_stream[VIDEO]->network_waiting_status) return network_stream[VIDEO]->network_waiting_status;
 		if (network_stream[AUDIO] && network_stream[AUDIO]->network_waiting_status) return network_stream[AUDIO]->network_waiting_status;

include/network/network_decoder_multiple.hpp

@@ -48,12 +48,20 @@ private :
 	volatile int seq_head = 0; // the latest sequence id available
 	volatile double duration_first_fragment = 0; // for some reason, the first fragment of a livestream differs in length from other fragments
 
+	double cur_preamp = 1.0;
+	double cur_tempo = 1.0;
+	double cur_pitch = 1.0;
+
+	void check_filter_update();
 	void recalc_buffered_head();
 public :
 	volatile bool &hw_decoder_enabled = decoder.hw_decoder_enabled;
 	volatile bool &interrupt = decoder.interrupt;
 	volatile bool &need_reinit = decoder.need_reinit;
 	volatile const bool &ready = decoder.ready;
+	volatile double preamp_change_request = -1;
+	volatile double tempo_change_request = -1;
+	volatile double pitch_change_request = -1;
 	const char *get_network_waiting_status() { return decoder.get_network_waiting_status(); }
 
 	NetworkMultipleDecoder ();
@@ -102,6 +110,7 @@ public :
 
 	// decode the previously read audio packet
 	Result_with_string decode_audio(int *size, u8 **data, double *cur_pos) {
+		check_filter_update();
 		auto res = decoder.decode_audio(size, data, cur_pos);
 		return res;
 	}

include/ui/views/bar.hpp

@@ -6,7 +6,7 @@ struct BarView : public FixedSizeView {
 private :
 	UI::FlexibleString<BarView> title;
 public :
-	using CallBackFuncType = std::function<void (const BarView &value)>;
+	using CallBackFuncType = std::function<void (BarView &value)>;
 	BarView (double x0, double y0, double width, double height) : View(x0, y0), FixedSizeView(x0, y0, width, height) {}
 	virtual ~BarView () {}
 

library/FFmpeg/ffmpeg_build.txt

@@ -1,9 +1,9 @@
 The ffmpeg binaries provided in this repository have been compiled by the following configuration :
 
 configure command :
-	./configure --enable-cross-compile --cross-prefix=[path_to_compiler] --prefix=[build_directory] --cpu=armv6k --arch=arm --target-os=linux --extra-cflags="-mfloat-abi=hard -mtune=mpcore -mtp=cp15" --extra-ldflags="-mfloat-abi=hard" --disable-filters --disable-devices --disable-bsfs --disable-parsers --disable-hwaccels --disable-debug --disable-programs --disable-avdevice --disable-postproc --disable-avfilter --disable-decoders --disable-demuxers --disable-encoders --disable-muxers --disable-asm --disable-protocols --enable-inline-asm --enable-vfp --enable-armv5te --enable-armv6 --enable-decoder="aac,h264,opus" --enable-demuxer="mov" --enable-protocol="file"
+	./configure --enable-cross-compile --cross-prefix=[path_to_compiler] --prefix=[build_directory] --cpu=armv6k --arch=arm --target-os=linux --extra-cflags="-mfloat-abi=hard -mtune=mpcore -mtp=cp15" --extra-ldflags="-mfloat-abi=hard" --disable-filters --disable-devices --disable-bsfs --disable-parsers --disable-hwaccels --disable-debug --disable-programs --disable-avdevice --disable-postproc --disable-decoders --disable-demuxers --disable-encoders --disable-muxers --disable-asm --disable-protocols --enable-inline-asm --enable-vfp --enable-armv5te --enable-armv6 --enable-filter="chorus,superequalizer,volume,asetrate,aformat,aresample,atempo,aecho,anull" --enable-decoder="aac,h264,opus" --enable-demuxer="mov" --enable-protocol="file"
 	An example for [path_to_compiler] and [build_directory] is "C:/devkitpro/devkitARM/bin/arm-none-eabi-" and "C:/ThirdTube/library/FFmpeg", respectively.
 
 compiler : devkitARM release 56
-hash of the commit used : 0bc7ddc460511c82392677c83bc320db26a4a06e
+hash of the commit used : 4dbd7ff283d67d57e38b7c7b09668362dde05a7b (modified by QCFium)
 The source code of FFmpeg used can be found in .\FFmpeg. If you find the directory empty, try running `git submodule init` and `git submodule update`.