Draft implementation:HEADmain

- f must be divisors of 44100 and be positive
- 44100 hardcoded

2 files changed, 31 insertions, 9 deletions

diff --git a/app/unisono/CMakeLists.txt b/app/unisono/CMakeLists.txt
index 8a44354..67bf8e0 100644
--- a/app/unisono/CMakeLists.txt
+++ b/app/unisono/CMakeLists.txt
@@ -22,7 +22,18 @@ find_library(LIBSNDFILE_LIBRARY
 message(STATUS "sndfile include dirs path: ${LIBSNDFILE_INCLUDE_DIR}")
 message(STATUS "sndfile libs path: ${LIBSNDFILE_LIBRARY}")
 
+if(LIBFSHIFT_BUILD_PUB_HEADER)
+	message(STATUS "use libfshift include path: ${LIBFSHIFT_BUILD_PUB_HEADER}")
+	include_directories(${LIBFSHIFT_BUILD_PUB_HEADER})
+endif()
+
 add_executable(unisono "main.c")
+
+if(LIBFSHIFT_BUILD_LIB_PATH)
+	message(STATUS "use libfshift lib path: ${LIBFSHIFT_BUILD_LIB_PATH}")
+	target_link_libraries(unisono PRIVATE ${LIBFSHIFT_BUILD_LIB_PATH})
+endif()
+
 include_directories(${LIBSNDFILE_INCLUDE_DIRS})
-target_link_libraries(unisono PRIVATE ${LIBSNDFILE_LIBRARY})
+target_link_libraries(unisono PRIVATE ${LIBSNDFILE_LIBRARY} m)
 
diff --git a/app/unisono/main.c b/app/unisono/main.c
index 4940962..8af3d68 100644
--- a/app/unisono/main.c
+++ b/app/unisono/main.c
@@ -4,12 +4,15 @@
 
 #include <sndfile.h>
 
+#include <libfshift.h>
+
 static void print_usage(const char* name)
 {
 	fprintf(stdout, "usage: %s\n", name);
 }
 
-#define BUFFER_LEN 16384
+#define BUFFER_LEN_POW 14
+#define BUFFER_LEN (1 << BUFFER_LEN_POW)
 
 static float in_data[BUFFER_LEN];
 static float out_data[BUFFER_LEN];
@@ -25,13 +28,14 @@ void downmix(float* in, int len)
 	}
 }
 
-void process(float *in, float *out, const SF_INFO *info, int len)
+void process(float *in, float *out, const SF_INFO *info, int len, fshift_ctx_t ctx)
 {
-	int i;
+	fshift_run(ctx, in, out + len/2, in + len/2);
+	int i, j;
 	// Call processing here
 	for (int i = 0; i < len / 2; i++) {
-		out[i * 2] = in[i];
-		out[i * 2 + 1] = -in[i];
+		out[i * 2] = in[len / 2 + i];
+		out[i * 2 + 1] = out[len / 2 + i];
 	}
 }
 
@@ -48,6 +52,7 @@ int main(int argc, char** argv)
 	int read_channels;
 	int read_block_sz = BUFFER_LEN;
 	int read_count;
+	fshift_ctx_t ctx;
 
 	while ((ch = getopt(argc, argv, "f:i:")) != -1) {
 		switch (ch) {
@@ -70,6 +75,11 @@ int main(int argc, char** argv)
 	out_file_nm = argv[optind];
 	fprintf(stderr, "input: %s -> %s, shift: %f hz\n", in_file_nm, out_file_nm, shift);
 
+	ctx = fshift_create_ctx(shift, BUFFER_LEN_POW - 1);
+	if (NULL == ctx) {
+		fprintf(stderr, "unable to create libfshift ctx\n");
+	}
+
 	memset(&sf_info, 0, sizeof(sf_info));
 
 	if (!(in_file = sf_open(in_file_nm, SFM_READ, &sf_info))) {
@@ -101,12 +111,13 @@ int main(int argc, char** argv)
 	while ((read_count = (int)sf_readf_float(in_file, in_data, BUFFER_LEN / 2))) {
 		if (read_channels == 2)
 			downmix(in_data, BUFFER_LEN);
-		process(in_data, out_data, &sf_info, BUFFER_LEN);
+		process(in_data, out_data, &sf_info, BUFFER_LEN, ctx);
 		sf_writef_float(out_file, out_data, read_count);
 	}
 
-	sf_close(in_file) ;
-	sf_close(out_file) ;
+	sf_close(in_file);
+	sf_close(out_file);
+	fshift_free_ctx(ctx);
 
 	return 0;
 }