X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/443e4c7ce400d3f2fe0c04984bafae8ea0dae964..16b0fea8ae1a581d568dbee2efa2932aa4e6fcce:/lib/resample.c

diff --git a/lib/resample.c b/lib/resample.c
index 11cb696..0363d99 100644
--- a/lib/resample.c
+++ b/lib/resample.c
@@ -41,10 +41,12 @@
  * @param input_channels Number of input channels
  * @param input_signed Whether input samples are signed or unsigned
  * @param input_rate Frames/second in input
+ * @param input_endian Input endianness (@c ENDIAN_BIG or @c ENDIAN_LITTLE)
  * @param output_bits Bits/sample in output
  * @param output_channels Number of output channels
  * @param output_rate Frames/second in output
  * @param output_signed Whether output samples are signed or unsigned
+ * @param output_endian Output endianness (@c ENDIAN_BIG or @c ENDIAN_LITTLE)
  *
  * For formats with more than two channels it's assume that the first
  * two channels are left and right.  No particular meaning is attached
@@ -97,7 +99,7 @@ void resample_close(struct resampler *rs) {
   if(rs->state)
     src_delete(rs->state);
 #else
-  rs = 0;                               /* quieten compiler */
+  if(rs){}                              /* quieten compiler */
 #endif
 }
 
@@ -199,7 +201,7 @@ static size_t resample_put_sample(const struct resampler *rs,
 /** @brief Convert input samples to floats
  * @param rs Resampler state
  * @param bytes Input bytes
- * @param nbytes Number of input bytes
+ * @param nframes Number of input frames
  * @param floats Where to store converted data
  *
  * @p floats must be big enough.  As well as converting to floats this
@@ -214,10 +216,8 @@ static size_t resample_put_sample(const struct resampler *rs,
  */
 static void resample_prepare_input(const struct resampler *rs,
                                    const uint8_t *bytes,
-                                   size_t nbytes,
+                                   size_t nframes,
                                    float *floats) {
-  size_t nframes = nbytes / (rs->input_bytes_per_frame);
-
   while(nframes > 0) {
     int n;
 
@@ -261,11 +261,12 @@ size_t resample_convert(const struct resampler *rs,
   float *input = xcalloc(nframesin * rs->output_channels, sizeof (float));
   float *output = 0;
 
-  resample_prepare_input(rs, bytes, nbytes, input);
+  resample_prepare_input(rs, bytes, nframesin, input);
 #if HAVE_SAMPLERATE_H
   if(rs->state) {
     /* A sample-rate conversion must be performed */
     SRC_DATA data;
+    memset(&data, 0, sizeof data);
     /* Compute how many frames are expected to come out. */
     size_t maxframesout = nframesin * rs->output_rate / rs->input_rate + 1;
     output = xcalloc(maxframesout * rs->output_channels, sizeof(float));
@@ -274,12 +275,17 @@ size_t resample_convert(const struct resampler *rs,
     data.input_frames = nframesin;
     data.output_frames = maxframesout;
     data.end_of_input = eof;
-    data.src_ratio = rs->output_rate / rs->input_rate;
+    data.src_ratio = (double)rs->output_rate / rs->input_rate;
+    D(("nframesin=%zu maxframesout=%zu eof=%d ratio=%d.%06d",
+       nframesin, maxframesout, eof,
+       (int)data.src_ratio,
+       ((int)(data.src_ratio * 1000000) % 1000000)));
     int error_ = src_process(rs->state, &data);
     if(error_)
       disorder_fatal(0, "calling src_process: %s", src_strerror(error_));
     nframesin = data.input_frames_used;
     nsamplesout = data.output_frames_gen * rs->output_channels;
+    D(("new nframesin=%zu nsamplesout=%zu", nframesin, nsamplesout));
   }
 #endif
   if(!output) {
@@ -301,8 +307,9 @@ size_t resample_convert(const struct resampler *rs,
   if(output != input)
     xfree(output);
   xfree(input);
-  eof = 0;             /* quieten compiler */
+  if(eof){}                             /* quieten compiler */
   /* Report how many input bytes were actually consumed */
+  //fprintf(stderr, "converted %zu frames\n", nframesin);
   return nframesin * rs->input_bytes_per_frame;
 }