X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fresampler.cc;h=322c00c136779f009ad1163119bce5496a191dad;hb=715d87a4cf9e4697a2f67881776c19c4ce8af581;hp=faf07e2a712d974c6d73da3247ab433c4edf6a8e;hpb=5ccb7323be3b7d7011d42de6f9843b3a813c7964;p=dcpomatic.git

diff --git a/src/lib/resampler.cc b/src/lib/resampler.cc
index faf07e2a7..322c00c13 100644
--- a/src/lib/resampler.cc
+++ b/src/lib/resampler.cc
@@ -1,19 +1,20 @@
 /*
     Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
 
-    This program is free software; you can redistribute it and/or modify
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
-    This program is distributed in the hope that it will be useful,
+    DCP-o-matic is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
 
 */
 
@@ -24,6 +25,7 @@
 #include "dcpomatic_assert.h"
 #include <samplerate.h>
 #include <iostream>
+#include <cmath>
 
 #include "i18n.h"
 
@@ -36,23 +38,37 @@ using boost::shared_ptr;
 /** @param in Input sampling rate (Hz)
  *  @param out Output sampling rate (Hz)
  *  @param channels Number of channels.
- *  @param fast true to be fast rather than good.
  */
-Resampler::Resampler (int in, int out, int channels, bool fast)
+Resampler::Resampler (int in, int out, int channels)
 	: _in_rate (in)
 	, _out_rate (out)
 	, _channels (channels)
 {
 	int error;
-	_src = src_new (fast ? SRC_LINEAR : SRC_SINC_BEST_QUALITY, _channels, &error);
+	_src = src_new (SRC_SINC_BEST_QUALITY, _channels, &error);
 	if (!_src) {
 		throw runtime_error (String::compose (N_("could not create sample-rate converter (%1)"), error));
 	}
 }
 
 Resampler::~Resampler ()
+{
+	if (_src) {
+		src_delete (_src);
+	}
+}
+
+void
+Resampler::set_fast ()
 {
 	src_delete (_src);
+	_src = 0;
+
+	int error;
+	_src = src_new (SRC_LINEAR, _channels, &error);
+	if (!_src) {
+		throw runtime_error (String::compose (N_("could not create sample-rate converter (%1)"), error));
+	}
 }
 
 shared_ptr<const AudioBuffers>
@@ -69,11 +85,11 @@ Resampler::run (shared_ptr<const AudioBuffers> in)
 		int const max_resampled_frames = ceil ((double) in_frames * _out_rate / _in_rate) + 32;
 
 		SRC_DATA data;
-		data.data_in = new float[in_frames * _channels];
+		float* in_buffer = new float[in_frames * _channels];
 
 		{
 			float** p = in->data ();
-			float* q = data.data_in;
+			float* q = in_buffer;
 			for (int i = 0; i < in_frames; ++i) {
 				for (int j = 0; j < _channels; ++j) {
 					*q++ = p[j][in_offset + i];
@@ -81,6 +97,7 @@ Resampler::run (shared_ptr<const AudioBuffers> in)
 			}
 		}
 
+		data.data_in = in_buffer;
 		data.input_frames = in_frames;
 
 		data.data_out = new float[max_resampled_frames * _channels];
@@ -105,6 +122,8 @@ Resampler::run (shared_ptr<const AudioBuffers> in)
 		}
 
 		if (data.output_frames_gen == 0) {
+			delete[] data.data_in;
+			delete[] data.data_out;
 			break;
 		}
 
@@ -139,12 +158,8 @@ Resampler::flush ()
 	int out_offset = 0;
 	int64_t const output_size = 65536;
 
-	/* I think this should only need to be 1 long, but I have seen
-	   src_process error with "input and output data arrays overlap"
-	   with dummy[1] (on OS X).  I've added a few more for luck.
-	*/
-	float dummy[16];
-	float buffer[output_size];
+	float dummy[1];
+	float* buffer = new float[output_size];
 
 	SRC_DATA data;
 	data.data_in = dummy;
@@ -156,6 +171,7 @@ Resampler::flush ()
 
 	int const r = src_process (_src, &data);
 	if (r) {
+		delete[] buffer;
 		throw EncodeError (String::compose (N_("could not run sample-rate converter (%1)"), src_strerror (r)));
 	}
 
@@ -172,5 +188,12 @@ Resampler::flush ()
 	out_offset += data.output_frames_gen;
 	out->set_frames (out_offset);
 
+	delete[] buffer;
 	return out;
 }
+
+void
+Resampler::reset ()
+{
+	src_reset (_src);
+}