Update scorealign to SVN r227.

2025-10-09 16:13:41 +02:00 · 2013-11-01 15:59:33 +00:00
parent ce00d5b507
commit e3bea17f16
49 changed files with 1768 additions and 10312 deletions
--- a/lib-src/libscorealign/audiofilereader.cpp
+++ b/lib-src/libscorealign/audiofilereader.cpp
@@ -0,0 +1,102 @@
+/* audiofilereader.cpp -- implements a class to read samples
+ *
+ * 14-Jun-08  RBD
+ * 16-Jun-08  RBD revised to use libsndfile
+ */
+#include "assert.h"
+#include "stdlib.h"
+#include "stdio.h"
+#include "string.h"
+#include "sndfile.h"
+#include "audioreader.h"
+#include "audiofilereader.h"
+
+#ifdef WIN32
+#include <malloc.h>
+#include <windows.h>
+#define bzero(addr, siz) memset(addr, 0, siz)
+#define alloca _alloca
+#endif
+
+double Audio_file_reader::get_sample_rate()
+{
+    return sf_info.samplerate;
+}
+
+
+long Audio_file_reader::get_frames()
+{
+    return total_frames;
+}
+
+
+long Audio_file_reader::read(float *data, long n)
+{
+    // note that "samples_per_frame" is really "frames_per_window" in this
+    // context, so we're computing bytes per window
+    float *input_data = (float *) alloca(bytes_per_frame * samples_per_frame);
+    assert(input_data != NULL) ;
+	
+    long frames_read = (long) sf_readf_float(sf, input_data, n);
+    long chans = sf_info.channels;
+    // now convert to mono and move to data
+    for (int frame = 0; frame < frames_read; frame++) {
+        float sum = 0;
+        for (int chan = 0; chan < sf_info.channels; chan++) {
+            // sum over channels within a frame
+            sum += input_data[frame * chans + chan];
+        }
+        // write the frame sum to result array
+        data[frame] = sum;
+    }
+    return frames_read;
+}
+
+
+bool Audio_file_reader::open(const char *filename, Scorealign &sa, bool verbose)
+{
+    bytes_per_frame = 0; // initialize now in case an error occurs
+    name[0] = 0;
+    bzero(&sf_info, sizeof(sf_info));
+    sf = sf_open(filename, SFM_READ, &sf_info);
+    if (!sf) {
+#ifdef WIN32
+		/* windows-specific code to report error opening file */
+		char *msg;
+		DWORD code = GetLastError();
+		DWORD code2 = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | 
+								    FORMAT_MESSAGE_FROM_SYSTEM,
+									0, code, 0, (LPSTR) &msg, 0, 0);
+	    printf("Error string: %s\n", msg);
+		LocalFree(msg);
+#endif
+		return false;
+	}
+    strncpy(name, filename, MAX_NAME_LEN);
+    name[MAX_NAME_LEN] = 0; // just in case
+    total_frames = (long) sf_seek(sf, 0, SEEK_END);
+    sf_seek(sf, 0, SEEK_SET);
+    // we're going to read floats, but they might be multi-channel...
+    bytes_per_frame = sf_info.channels * sizeof(float);
+    calculate_parameters(sa, verbose);
+    return true;
+}
+
+
+void Audio_file_reader::close()
+{
+    sf_close(sf);
+}
+
+
+void Audio_file_reader::print_info()
+{
+    printf("   file name = %s\n", name);
+    double sample_rate = sf_info.samplerate;
+    printf("   sample rate = %g\n", sample_rate);
+    printf("   channels = %d\n", sf_info.channels);
+    /*=============================================================*/
+    printf("   total frames number is = %ld\n", total_frames);
+    printf("   audio duration = %g seconds\n", total_frames / sample_rate);
+    /*=============================================================*/
+}