From bb042178b3296cacc11a53c4ce9b7f3cc6732270 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sat, 27 Sep 2014 19:21:29 +0200
Subject: Switch to libaudioio. Fix playback stuttering.

---
 src/audiobackend-alsa.cc | 73 +++++++++++++++++-------------------------------
 1 file changed, 25 insertions(+), 48 deletions(-)

(limited to 'src/audiobackend-alsa.cc')

diff --git a/src/audiobackend-alsa.cc b/src/audiobackend-alsa.cc
index b4401ca..5f3db40 100644
--- a/src/audiobackend-alsa.cc
+++ b/src/audiobackend-alsa.cc
@@ -27,85 +27,62 @@
 #include "audiobackend-alsa.h"
 
 #include <memory.h>
+#include <stdio.h>
 
 #include "mediaconfig.h"
 
 AudioBackendAlsa::AudioBackendAlsa(const char *device)
 {
-  //
-  // LibAO:
-  //
-  ao_initialize();
-
-  ao_sample_format sf;
-  memset(&sf, 0, sizeof(sf));
-  sf.bits = 16;
-  sf.rate = SAMPLERATE;
-  sf.channels = 1;
-  sf.byte_format = AO_FMT_NATIVE;
-
-  dev = ao_open_live(ao_default_driver_id(), &sf, 0);
-
-  //
-  // LibAudioIn:
-  //
   int err;
-  ai = ai_init(&err, device, "", SAMPLERATE, 1);
-  if(ai == NULL || err) {
+  aio = aio_init(&err, "default", NULL, device, NULL, SAMPLERATE, 1);
+  if(aio == NULL || err) {
     printf("ai_init: %d (device: %s)\n", err, device);
     exit(1);
     return;
   }
   
-  int srate = ai_get_samplerate(&err, ai);
+  int srate = aio_get_samplerate(aio);
   if(err) printf("ai_get_samplerate: %d\n", err);
   if(srate != SAMPLERATE) {
     printf("Samplerate: %d\n", srate);
   }
+
+  printf("buffer size: %d\n", aio_get_buffer_size(aio));
 }
 
 AudioBackendAlsa::~AudioBackendAlsa()
 {
-  //
-  // LibAO:
-  //
-  ao_close(dev);
-  ao_shutdown();
-
-  //
-  // LibAudioIn:
-  //
-  if(ai == NULL) {
-    printf("ai_err: no handle\n");
-    return;
-  }
-
-  int err;
-  ai_close(&err, ai);
+  int err = aio_close(aio);
   if(err) printf("ai_err: %d\n", err);
 }
 
 int AudioBackendAlsa::read(char *pcm, size_t maxsize)
 {
-  //
-  // LibAudioIn:
-  //
-  if(ai == NULL) {
+  if(aio == NULL) {
     printf("ai_err: no handle\n");
     return 0;
   }
 
-  int err;
-  int ret = ai_read(&err, ai, pcm, maxsize);
-  if(err) printf("ai_read: %d\n", err);
+  int ret = aio_read(aio, pcm, maxsize);
+  if(ret < 0) printf("ai_read: %d\n", ret);
   return ret;
 }
 
 int AudioBackendAlsa::write(const char *pcm, size_t size)
 {
-  //
-  // LibAO:
-  //
-  ao_play(dev, (char *)pcm, size);
-  return 0;
+  if(aio == NULL) {
+    printf("aio_err: no handle\n");
+    return 0;
+  }
+
+  int ret = aio_write(aio, pcm, size);
+  if(ret < 0) printf("ai_write: %d\n", ret);
+  return ret;
+}
+
+int AudioBackendAlsa::getBufferSize()
+{
+  int ret = aio_get_buffer_size(aio);
+  if(ret > 0) return ret;
+  return AudioBackend::getBufferSize();
 }
-- 
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