From aa8599e808008a14ac0f7d40f91dc2e05bd3bd0a Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sat, 12 Apr 2014 19:59:17 +0200
Subject: Make engine ask output module for buffer size. Use this new feature
 to adapt internal buffers to buffer size reported by jack.

---
 drumgizmo/audiooutputenginedl.cc        | 12 ++++++++++++
 drumgizmo/audiooutputenginedl.h         |  4 ++++
 drumgizmo/input/jackmidi/jackmidi.cc    |  2 +-
 drumgizmo/output/jackaudio/jackaudio.cc | 31 +++++++++++++++++++------------
 4 files changed, 36 insertions(+), 13 deletions(-)

(limited to 'drumgizmo')

diff --git a/drumgizmo/audiooutputenginedl.cc b/drumgizmo/audiooutputenginedl.cc
index ad8d815..513d21b 100644
--- a/drumgizmo/audiooutputenginedl.cc
+++ b/drumgizmo/audiooutputenginedl.cc
@@ -105,6 +105,12 @@ AudioOutputEngineDL::AudioOutputEngineDL(std::string name)
     return;
   }
 
+  o_bufsize = (output_bufsize_func_t) dlsym(lib, "bufsize");
+  dlsym_error = dlerror();
+  if(dlsym_error) {
+    o_bufsize = NULL;
+  }
+
   ptr = o_create();
 
   if(is_jack_plugin) {
@@ -169,6 +175,12 @@ void AudioOutputEngineDL::post(size_t size)
   return o_post(ptr, size);
 }
 
+size_t AudioOutputEngineDL::getBufferSize()
+{
+  if(o_bufsize) return o_bufsize(ptr);
+  return 1024;
+}
+
 #ifdef TEST_AUDIOOUTPUTENGINEDL
 //Additional dependency files
 //deps:
diff --git a/drumgizmo/audiooutputenginedl.h b/drumgizmo/audiooutputenginedl.h
index 4b22131..471247e 100644
--- a/drumgizmo/audiooutputenginedl.h
+++ b/drumgizmo/audiooutputenginedl.h
@@ -45,6 +45,7 @@ typedef void (*output_setparm_func_t)(void*,const char*,const char*);
 typedef void (*output_pre_func_t)(void*, size_t);
 typedef void (*output_run_func_t)(void*,int,sample_t*,size_t);
 typedef void (*output_post_func_t)(void*, size_t);
+typedef size_t (*output_bufsize_func_t)(void*);
 
 class AudioOutputEngineDL : public AudioOutputEngine {
 public:
@@ -62,6 +63,8 @@ public:
   void run(int ch, sample_t *samples, size_t nsamples);
   void post(size_t nsamples);
 
+  size_t getBufferSize();
+
 private:
   void *ptr;
   output_create_func_t o_create;
@@ -73,6 +76,7 @@ private:
   output_pre_func_t o_pre;
   output_run_func_t o_run;
   output_post_func_t o_post;
+  output_bufsize_func_t o_bufsize;
 
   bool is_jack_plugin;
   JackClient *jackclient;
diff --git a/drumgizmo/input/jackmidi/jackmidi.cc b/drumgizmo/input/jackmidi/jackmidi.cc
index 89db418..5496195 100644
--- a/drumgizmo/input/jackmidi/jackmidi.cc
+++ b/drumgizmo/input/jackmidi/jackmidi.cc
@@ -137,7 +137,7 @@ event_t *JackMidi::run(size_t pos, size_t len, size_t *nevents)
 
 void JackMidi::jack_process(jack_nframes_t nframes)
 {
-  printf("i"); fflush(stdout);
+  // printf("i"); fflush(stdout);
 
   void *midibuffer = jack_port_get_buffer(midi_port, nframes);
 
diff --git a/drumgizmo/output/jackaudio/jackaudio.cc b/drumgizmo/output/jackaudio/jackaudio.cc
index 0fd985e..150c114 100644
--- a/drumgizmo/output/jackaudio/jackaudio.cc
+++ b/drumgizmo/output/jackaudio/jackaudio.cc
@@ -53,6 +53,8 @@ public:
 
   void jack_process(jack_nframes_t nframes);
 
+  size_t bufsize();
+
 private:
   JackClient *jackclient;
   jack_port_t *output_port[64];
@@ -61,7 +63,7 @@ private:
   Semaphore sem;
 };
 
-JackAudio::JackAudio()
+JackAudio::JackAudio() : sem("jackaudio")
 {
 }
 
@@ -85,7 +87,7 @@ bool JackAudio::init(int nchannels, char *cnames[])
                                         name.c_str(),
                                         JACK_DEFAULT_AUDIO_TYPE,
                                         JackPortIsOutput, 0);
-    channels[i] = (sample_t*)malloc(16 * sizeof(sample_t));
+    channels[i] = (sample_t*)malloc(bufsize() * sizeof(sample_t));
   }
   return true;
 }
@@ -113,7 +115,7 @@ void JackAudio::pre(size_t size)
 }
 
 void JackAudio::run(int channel, sample_t* data, size_t size)
-{ 
+{
   // Copy engine data to ringbuffer.
   for(size_t i = 0; i < size; i++) {
     channels[channel][i] = data[i];
@@ -122,18 +124,12 @@ void JackAudio::run(int channel, sample_t* data, size_t size)
 
 void JackAudio::post(size_t size)
 {
-  sem.wait();
+  //sem.wait();
 }
 
 void JackAudio::jack_process(jack_nframes_t nframes)
 {
-  if(nframes != 128) {
-    fprintf(stderr, "jackaudio output module currently only works with a"
-            " buffersize of 64 samples!\n");
-    exit(1);
-  }
-
-  printf("o"); fflush(stdout);
+  //printf("o"); fflush(stdout);
   for(size_t c = 0; c < nchannels; c++) {
     jack_default_audio_sample_t *out =
       (jack_default_audio_sample_t *) jack_port_get_buffer(output_port[c],
@@ -142,7 +138,12 @@ void JackAudio::jack_process(jack_nframes_t nframes)
       out[i] = channels[c][i];
     }
   }
-  sem.post();
+  //  sem.post();
+}
+
+size_t JackAudio::bufsize()
+{
+  return jack_get_buffer_size(jackclient->jack_client);
 }
 
 extern "C" {
@@ -198,6 +199,12 @@ extern "C" {
     JackAudio *jack = (JackAudio*)h;
     jack->post(s);
   }
+
+  size_t bufsize(void *h)
+  {
+    JackAudio *jack = (JackAudio*)h;
+    return jack->bufsize();
+  }
 }
 
 #ifdef TEST_AUDIOINPUTENGINEJACKAUDIO
-- 
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