Add an option to allow seamless connection after last processed frame

1 files changed, 8 insertions, 3 deletions

diff --git a/timestretch.c b/timestretch.c
index 14ed732..b15bfe7 100644
--- a/timestretch.c
+++ b/timestretch.c
@@ -34,6 +34,7 @@ static size_t calc_convert_values( int sample_rate, float tempo ) {
     free( g_overlap_buffer );
     g_overlap_buffer = malloc( sizeof(short) * g_overlap );
     g_firstframe = 1;
+    g_offset = 0;
 
     g_output_length = (sample_rate * OUTPUT_LEN ) / 1000;
     if ( g_output_length < g_overlap)
@@ -87,7 +88,7 @@ static unsigned int find_corr_max(const short *input, const short *mixbuf) {
 }
 
 // Returns the amount of samples that can be discarded from begin of the input buffer
-size_t process_frame( short *input, short *output, short *overlap ) {
+size_t process_frame( short *input, short *output, short *overlap, int lastframe ) {
     int i, i_ = (int)g_overlap;
     unsigned int offset = 0;
 
@@ -107,6 +108,10 @@ size_t process_frame( short *input, short *output, short *overlap ) {
         sampcpy( output + g_overlap, input + offset + g_overlap, g_output_length - g_overlap );
     }
 
+    // On the last frame help connect the next frame from input seamlessly
+    if( lastframe )
+        return offset + g_output_length;
+
     // Remember end of this frame for next frame
     sampcpy( overlap, input + offset + g_output_length, g_overlap );
 
@@ -122,7 +127,7 @@ int main( int args, char **argv ) {
   short     outbuf[ g_output_length ];
   short     inbuf [ g_input_length  ];
 
-  printf( "DEBUG: OL: %zd SWL: %zd SL: %zd SK: %zd ICM: %zd\n", g_overlap, g_output_length, g_corr_length, g_skip / 65536, g_input_length );
+//  printf( "DEBUG: OL: %zd SWL: %zd SL: %zd SK: %zd ICM: %zd\n", g_overlap, g_output_length, g_corr_length, g_skip / 65536, g_input_length );
 
   int fd_in  = open( "in.raw", O_RDONLY );
   int fd_out = open( "out.raw", O_CREAT | O_WRONLY | O_TRUNC );
@@ -143,7 +148,7 @@ int main( int args, char **argv ) {
     }
 
     // Do one cycle of processing and outputting
-    processed = process_frame( inbuf, outbuf, g_overlap_buffer );
+    processed = process_frame( inbuf, outbuf, g_overlap_buffer, 0 );
     write( fd_out, outbuf, g_output_length * sizeof(short) );
 
     memmove( inbuf, inbuf + processed, ( in_fill - processed ) * sizeof(short) );