Add build system for linux

.gitignore

@@ -1,2 +1,4 @@
 libs/
 .DS_Store
+.build/
+libaudio-test

Makefile

@@ -0,0 +1,34 @@
+SRCS :=  AudioLib/main.c
+INCLUDES := -Iaudio/include
+
+BUILDDIR = .build
+TARGET := libaudio-test
+OBJS := $(addprefix $(BUILDDIR)/, $(patsubst %.c,%.o, $(SRCS)))
+
+CC = gcc
+AR = ar
+PKGCONFIG = pkg-config
+CFLAGS = --std=gnu99 -Wall
+
+all: $(TARGET)
+
+$(TARGET): $(OBJS) | audiolib
+	$(CC) `$(PKGCONFIG) --libs ao` -Laudio/.build/ -Laudio/.build/libmad -Laudio/.build/speexdsp -o $(TARGET) $(OBJS) -laudio -lmad -lspeexresampler -lm
+
+audiolib:
+	(cd audio; make)
+
+$(BUILDDIR)/%.o: %.c
+	$(CC) $(INCLUDES) $(CFLAGS) -c $< -o $@
+
+$(OBJS): | $(BUILDDIR)
+
+$(BUILDDIR):
+	mkdir -p $(BUILDDIR)/AudioLib
+
+.PHONY: clean
+
+clean:
+	-rm $(OBJS)
+	-rm $(TARGET)
+	(cd audio; make clean)

audio/Makefile

@@ -0,0 +1,48 @@
+SRCS := \
+	audio.c \
+	audio_internal.c \
+	audio_source_file.c \
+	audio_source_testtone.c \
+	audio_demuxer_mp3.c \
+	audio_decoder_mp3.c \
+	audio_filter_param_eq.c \
+	audio_filter_resample.c \
+	audio_sink_file.c \
+	audio_sink_libao.c
+
+INCLUDES := -Iinclude
+
+BUILDDIR = .build
+TARGET := $(BUILDDIR)/libaudio.a
+OBJS := $(addprefix $(BUILDDIR)/, $(patsubst %.c,%.o, $(SRCS)))
+
+CC = gcc
+AR = ar
+CFLAGS = --std=gnu99 -Wall
+
+all: $(TARGET) $(BUILDDIR)/libmad/libmad.a $(BUILDDIR)/speexdsp/libspeexresampler.a
+
+$(TARGET): $(OBJS)
+	$(AR) -cr $(TARGET) $(OBJS)
+
+$(BUILDDIR)/libmad/libmad.a:
+	(cd deps/mp3; make BUILDDIR=$(abspath $(BUILDDIR)/libmad))
+
+$(BUILDDIR)/speexdsp/libspeexresampler.a:
+	(cd deps/resampler; make BUILDDIR=$(abspath $(BUILDDIR)/speexdsp))
+
+$(BUILDDIR)/%.o: %.c include/%.h
+	$(CC) $(INCLUDES) $(CFLAGS) -c $< -o $@
+
+$(OBJS): | $(BUILDDIR)
+
+$(BUILDDIR):
+	mkdir -p $(BUILDDIR)
+
+.PHONY: clean
+
+clean:
+	-rm $(OBJS)
+	-rm $(TARGET)
+	(cd deps/mp3; make BUILDDIR=$(abspath $(BUILDDIR)/libmad) clean)
+	(cd deps/resampler; make BUILDDIR=$(abspath $(BUILDDIR)/speexdsp) clean)

audio/audio_filter_param_eq.c

@@ -195,10 +195,10 @@ static BiQuad biquad_initialize(EQBand band, uint32_t sampleRate) {
 #else
 static BiQuad biquad_initialize(EQBand band, uint32_t sampleRate) {
     BiQuad b;
-    double b0, b1, b2, a1, a2;
+    double b0 = 0, b1 = 0, b2 = 0, a1 = 0, a2 = 0;
     double Fc = band.frequency / sampleRate;
     
-    double norm;
+    double norm = 0;
     double V = pow(10, fabs(band.gain) / 20.0);
     double K = tan(M_PI * Fc);
     

audio/audio_sink_file.c

@@ -24,7 +24,9 @@ AudioPipelineStatus sink_file_link(AudioPipelineElement *self, AudioPipelineElem
 
     if (context->fp != NULL) {
         fseek(context->fp, 0, SEEK_SET);
-        ftruncate(fileno(context->fp), 0);
+        if (ftruncate(fileno(context->fp), 0) != 0) {
+            fprintf(stderr, "WARN: ftruncate failed with %d\n", errno);
+        }
     }
        
     source->next = self;

audio/deps/mp3/Makefile

@@ -0,0 +1,39 @@
+SRCS := \
+	bit.c \
+	fixed.c \
+	frame.c \
+	huffman.c \
+	layer3.c \
+	layer12.c \
+	stream.c \
+	synth.c \
+	timer.c \
+	version.c
+
+
+BUILDDIR = .build
+TARGET := $(BUILDDIR)/libmad.a
+OBJS := $(addprefix $(BUILDDIR)/, $(patsubst %.c,%.o, $(SRCS)))
+
+CC = gcc
+AR = ar
+CFLAGS = --std=gnu99 -Wall
+
+all: $(TARGET)
+
+$(TARGET): $(OBJS)
+	$(AR) -cr $(TARGET) $(OBJS)
+
+$(BUILDDIR)/%.o: %.c %.h config.h 
+	$(CC) $(CFLAGS) -c $< -o $@
+
+$(OBJS): | $(BUILDDIR)
+
+$(BUILDDIR):
+	mkdir -p $(BUILDDIR)
+
+.PHONY: clean
+
+clean:
+	-rm $(OBJS)
+	-rm $(TARGET)

audio/deps/mp3/frame.c

@@ -314,7 +314,6 @@ int mad_header_decode(struct mad_header *header, struct mad_stream *stream) {
         stream->sync = 1;
     }
 
-sync:
     /* synchronize */
     if (stream->sync) {
         if (end - ptr < MAD_BUFFER_GUARD) {
@@ -381,27 +380,6 @@ sync:
     header->frame_size_bytes = N - 4;
     stream->next_frame = stream->this_frame + N;
     
-#if 0
-    /* verify there is enough data left in buffer to decode this frame */
-    if (N + MAD_BUFFER_GUARD > end - stream->this_frame) {
-        stream->next_frame = stream->this_frame;
-
-        stream->error = MAD_ERROR_BUFLEN;
-        goto fail;
-    }
-
-    if (!stream->sync) {
-        /* check that a valid frame header follows this frame */
-
-        ptr = stream->next_frame;
-        if (!(ptr[0] == 0xff && (ptr[1] & 0xe0) == 0xe0)) {
-            ptr = stream->next_frame = stream->this_frame + 1;
-            goto sync;
-        }
-
-        stream->sync = 1;
-    }
-#endif
     header->flags |= MAD_FLAG_INCOMPLETE;
 
     return 0;

audio/deps/mp3/layer3.c

@@ -1566,7 +1566,7 @@ static void III_aliasreduce(mad_fixed_t xr[576], int lines)
 void III_imdct_l(mad_fixed_t const[18], mad_fixed_t[36], unsigned int);
 #else
 #if 1
-static void fastsdct(mad_fixed_t const x[9], mad_fixed_t y[18]) {
+static void fastsdct(mad_fixed_t const x[9], mad_fixed_t y[17]) {
     mad_fixed_t a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12;
     mad_fixed_t a13, a14, a15, a16, a17, a18, a19, a20, a21, a22, a23, a24, a25;
     mad_fixed_t m0, m1, m2, m3, m4, m5, m6, m7;

audio/deps/resampler/Makefile

@@ -0,0 +1,28 @@
+SRCS := resample.c
+
+BUILDDIR = .build
+TARGET := $(BUILDDIR)/libspeexresampler.a
+OBJS := $(addprefix $(BUILDDIR)/, $(patsubst %.c,%.o, $(SRCS)))
+
+CC = gcc
+AR = ar
+CFLAGS = --std=gnu99 -Wall
+
+all: $(TARGET)
+
+$(TARGET): $(OBJS)
+	$(AR) -cr $(TARGET) $(OBJS)
+
+$(BUILDDIR)/%.o: %.c config.h 
+	$(CC) $(CFLAGS) -c $< -o $@
+
+$(OBJS): | $(BUILDDIR)
+
+$(BUILDDIR):
+	mkdir -p $(BUILDDIR)
+
+.PHONY: clean
+
+clean:
+	-rm $(OBJS)
+	-rm $(TARGET)

audio/deps/resampler/config.h

@@ -1,11 +1,25 @@
-/* Make use of ARM4 assembly optimizations */
+#if defined(__x86_64__)
 # undef ARM4_ASM
-
-/* Make use of ARM5E assembly optimizations */
 # undef ARM5E_ASM
-
+# undef USE_NEON
+#elif defined(__arm__)
+# if defined(__ARM_NEON) || defined(__ARM_NEON__) || defined(__ARM_FEATURE_SIMD32)
    /* Enable NEON support */
+#  undef ARM4_ASM
+#  undef ARM5E_ASM
 #  define USE_NEON /**/
+# elif defined(__ARM_ARCH_4__)
+   /* Make use of ARM4 assembly optimizations */
+#  define ARM4_ASM /**/
+#  undef ARM5E_ASM
+#  undef USE_NEON
+# elif defined(__ARM_ARCH_5E__)
+   /* Make use of ARM5E assembly optimizations */
+#  undef ARM4_ASM
+#  define ARM5E_ASM /**/
+#  undef USE_NEON
+# endif
+#endif 
 
 /* Symbol visibility prefix */
 #define EXPORT __attribute__((visibility("default")))

shell.nix

@@ -0,0 +1,11 @@
+{ pkgs ? import <nixpkgs> {} }:
+pkgs.mkShell {
+    nativeBuildInputs = with pkgs.buildPackages; [
+      libao
+      pkg-config
+      gcc
+      file
+    ];
+    shellHook = ''
+    '';
+}