Small bug fix.

.gitignore

@@ -12,23 +12,8 @@
 *.gch
 *.pch
 
-# Compiled Dynamic libraries
-*.so
-*.dylib
-*.dll
-
 # Fortran module files
 *.mod
 *.smod
 
-# Compiled Static libraries
-*.lai
-*.la
-*.a
-*.lib
-
-# Executables
-*.exe
-*.out
-*.app
 

Makefile

@@ -1,16 +1,26 @@
 
+
 all:
 	mkdir -p build
 	cmake -S ao-play-async -B build
 	(cd build; make)
 
-install:
+install: all
-	mkdir -p ../../lib
 	SUBDIR=`racket -e "(display (format \"~a-~a\" (system-type 'os*) (system-type 'arch)))"`; \
-	FILES=`ls build/*.so` 2>/dev/null; if [ "$$FILES" != "" ]; then cp $$FILES ../../lib/$$SUBDIR; fi
+	mkdir -p lib/$$SUBDIR
 	SUBDIR=`racket -e "(display (format \"~a-~a\" (system-type 'os*) (system-type 'arch)))"`; \
-	FILES=`ls build/*.dll` 2>/dev/null; if [ "$$FILES" != "" ]; then cp $$FILES ../../lib/$$SUBDIR; fi
+	FILES=`ls build/*.so` 2>/dev/null; if [ "$$FILES" != "" ]; then cp $$FILES lib/$$SUBDIR; fi
+	SUBDIR=`racket -e "(display (format \"~a-~a\" (system-type 'os*) (system-type 'arch)))"`; \
+	FILES=`ls build/*.dll` 2>/dev/null; if [ "$$FILES" != "" ]; then cp $$FILES lib/$$SUBDIR; fi
 
+test: install
+	cp lib/linux-x86_64/*.so ~/.local/share/racket/racket-sound-lib/linux-x86_64
+
+zip: install
+	SUBDIR=`racket -e "(display (format \"~a-~a\" (system-type 'os*) (system-type 'arch)))"`; \
+	(cd lib; zip -y -r -9 $$SUBDIR.zip $$SUBDIR)
+	SUBDIR=`racket -e "(display (format \"~a-~a\" (system-type 'os*) (system-type 'arch)))"`; \
+	(cd lib; rm -rf $$SUBDIR)
 
 clean:
 	rm -rf build

ao-play-async/.gitignore

@@ -72,3 +72,4 @@ CMakeLists.txt.user*
 *.dll
 *.exe
 
+build

ao-play-async/CMakeLists.txt

@@ -10,4 +10,17 @@ add_library(ao-play-async SHARED
     ao_playasync.h
 )
 
+if(WIN32)
+    #include_directories(../../libao/include ../../libao/build-windows)
+    include_directories(windows)
+    target_link_directories(ao-play-async PRIVATE ../lib/windows-x86_64)
+endif()
+
+if(WIN32)
+    target_link_libraries(ao-play-async PRIVATE libao-1.2.2 winmm.lib ksuser.lib)
+else()
+    target_link_libraries(ao-play-async PRIVATE ao)
+endif()
+
 target_compile_definitions(ao-play-async PRIVATE AOPLAYASYNC_LIBRARY)
+

ao-play-async/ao_playasync.c

@@ -12,31 +12,82 @@
 #ifdef USE_WINDOWS_THREADS
   #define MUTEX_LOCK(m) WaitForSingleObject(m, INFINITE)
   #define MUTEX_UNLOCK(m) ReleaseMutex(m)
+  #define SEM_WAIT(sem, ms) (WaitForSingleObject(sem, ms) == WAIT_OBJECT_0)
+  #define SEM_TRYWAIT(sem) (WaitForSingleObject(sem, 0) == WAIT_OBJECT_0)
+  #define SEM_POST(sem) ReleaseSemaphore(sem, 1, NULL)
+  #define YIELD() sleep_ms(5)
 #endif
 
 #ifdef USE_PTHREADS
   #include <pthread.h>
+  #include <semaphore.h>
+  #include <sched.h>
+
+  #define TIME_NS_IN_MSEC  1000000ULL
+  static void makeSemTimeoutTime(struct timespec *ts, int ms) {
+      clock_gettime(CLOCK_REALTIME, ts);
+      ts->tv_sec += ms / 1000;
+      ts->tv_nsec += (ms % 1000) * TIME_NS_IN_MSEC;
+      if (ts->tv_nsec >= 1000000000L) {
+          ts->tv_sec++;
+          ts->tv_nsec = ts->tv_nsec - 1000000000L;
+      }
+  }
+
+  static int _SEM_WAIT(sem_t *sem, int ms)
+  {
+    struct timespec ts;
+    makeSemTimeoutTime(&ts, ms);
+    int r = sem_timedwait(sem, &ts);
+    return (r == 0);
+  }
+
+  static int msleep(long msec)
+  {
+      struct timespec ts;
+      int res;
+
+      if (msec < 0) {
+          return -1;
+      }
+
+      ts.tv_sec = msec / 1000;
+      ts.tv_nsec = (msec % 1000) * 1000000;
+
+      res = nanosleep(&ts, &ts);
+      return res;
+  }
+
+  static void yield()
+  {
+    msleep(5);
+  }
+
   #define MUTEX_LOCK(m) pthread_mutex_lock(&m)
   #define MUTEX_UNLOCK(m) pthread_mutex_unlock(&m)
+  #define SEM_WAIT(sem, ms) _SEM_WAIT(&sem, ms)
+  #define SEM_TRYWAIT(sem) (sem_trywait(&sem) == 0)
+  #define SEM_POST(sem) sem_post(&sem)
+  #define YIELD() yield()
 #endif
 
 #ifndef WIN32
 #include <unistd.h>
 #endif
 
-#include <assert.h>
 #include <malloc.h>
 #include <string.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdint.h>
+#include <ao/ao.h>
 
 typedef enum {
     PLAY = 1,
     STOP = 2
 } Command_t;
 
-typedef void * ao_device;
 
 typedef struct _queue_ {
     Command_t command;
@@ -44,6 +95,7 @@ typedef struct _queue_ {
     int buflen;
     double at_second;
     double music_duration;
+    int music_id;
     struct _queue_ *next;
     struct _queue_ *prev;
 } Queue_t;
@@ -53,36 +105,45 @@ typedef int(*ao_play_func_t)(void *, char *, uint32_t);
 typedef struct {
     Queue_t        *play_queue;
     Queue_t        *last_frame;
+
+    int             paused;
+
     ao_device      *ao_device;
 #ifdef USE_WINDOWS_THREADS
     HANDLE          mutex;
+    HANDLE          pause_mutex;
+    HANDLE          clear_mutex;
     HANDLE          thread;
     DWORD           thread_id;
+    HANDLE          queue_sem;
 #endif
 #ifdef USE_PTHREADS
     pthread_mutex_t mutex;
+    pthread_mutex_t pause_mutex;
+    pthread_mutex_t clear_mutex;
     pthread_t       thread;
+    sem_t           queue_sem;
 #endif
     double          at_second;
     double          music_duration;
-    ao_play_func_t  ao_play_f;
+    int             at_music_id;
     int             buf_size;
-    int             paused;
 } AO_Handle;
 
-//static int(*ao_play)(void *device, char *samples, uint32_t n) = NULL;
 
-
+static Queue_t *get(AO_Handle *h, int ms_wait)
-static Queue_t *front(AO_Handle *h)
 {
-    assert(h->play_queue != NULL);
+    Queue_t *q = NULL;
-    return h->play_queue;
+    int r;
+    if (ms_wait <= 0) {
+      r = SEM_TRYWAIT(h->queue_sem);
+    } else {
+      r = SEM_WAIT(h->queue_sem, ms_wait);
     }
-
+    if (r) {
-static Queue_t *get(AO_Handle *h)
+      MUTEX_LOCK(h->mutex);
-{
+      if (h->play_queue != NULL) {             // Clear could have cleared the play_queue.
-    assert(h->play_queue != NULL);
+        q = h->play_queue;
-    Queue_t *q = h->play_queue;
         h->play_queue = h->play_queue->next;
         if (h->play_queue == NULL) {
             h->last_frame = NULL;
@@ -90,11 +151,15 @@ static Queue_t *get(AO_Handle *h)
             h->play_queue->prev = NULL;
         }
         h->buf_size -= q->buflen;
+      }
+      MUTEX_UNLOCK(h->mutex);
+    }
     return q;
 }
 
 static void add(AO_Handle *h, Queue_t *elem)
 {
+    MUTEX_LOCK(h->mutex);
     if (h->last_frame == NULL) {
         h->play_queue = elem;
         elem->next = NULL;
@@ -107,9 +172,11 @@ static void add(AO_Handle *h, Queue_t *elem)
         h->last_frame = elem;
     }
     h->buf_size += elem->buflen;
+    SEM_POST(h->queue_sem);
+    MUTEX_UNLOCK(h->mutex);
 }
 
-static Queue_t *new_elem(int command, double at_second, double music_duration, int buf_len, void *buf)
+static Queue_t *new_elem(int command, int music_id, double at_second, double music_duration, int buf_len, void *buf)
 {
     Queue_t *q = (Queue_t *) malloc(sizeof(Queue_t));
     void *new_buf;
@@ -120,11 +187,12 @@ static Queue_t *new_elem(int command, double at_second, double music_duration, i
     } else {
         new_buf = NULL;
     }
+    q->music_id = music_id;
     q->at_second = at_second;
     q->music_duration = music_duration;
     q->buf = new_buf;
     q->buflen = buf_len;
-    q->command = command;
+    q->command = (Command_t) command;
     q->next = NULL;
     q->prev = NULL;
     return q;
@@ -140,10 +208,18 @@ static void del_elem(Queue_t *q)
 
 static void clear(AO_Handle *h)
 {
-    while (h->play_queue != NULL) {
+    //fprintf(stderr, "Wait for clear mutex\n");
-        Queue_t *q = get(h);
+    MUTEX_LOCK(h->clear_mutex);
+    //fprintf(stderr, "Starting clear\n");
+    int count = 0;
+    Queue_t *q = get(h, 0);
+    while (q != NULL) {
       del_elem(q);
+      count += 1;
+      q = get(h, 0);
     }
+    fprintf(stderr, "%d elements cleared\n", count);
+    MUTEX_UNLOCK(h->clear_mutex);
 }
 
 #ifdef USE_PTHREADS
@@ -154,30 +230,28 @@ static DWORD run(LPVOID arg)
 #endif
 {
     AO_Handle *handle = (AO_Handle *) arg;
-
     int go_on = (1 == 1);
 
     while(go_on) {
-        MUTEX_LOCK(handle->mutex);
+        MUTEX_LOCK(handle->pause_mutex);
-        int has_frames = (!handle->paused) && (handle->play_queue != NULL);
+        MUTEX_UNLOCK(handle->pause_mutex);
-
+        MUTEX_LOCK(handle->clear_mutex);
-        if (has_frames) {
+        Queue_t *q = get(handle, 250);
-            Queue_t *q = get(handle);
+        MUTEX_UNLOCK(handle->clear_mutex);
+        if (q != NULL) {
           handle->at_second = q->at_second;
           handle->music_duration = q->music_duration;
-            MUTEX_UNLOCK(handle->mutex);
+          handle->at_music_id = q->music_id;
 
           if (q->command == STOP) {
               go_on = (1 == 0);
           } else {
-                //fprintf(stderr, "playing buf at %lf\n", handle->at_second);
+              ao_play(handle->ao_device, (char *) q->buf, q->buflen);
-                handle->ao_play_f(handle->ao_device, q->buf, q->buflen);
           }
 
           del_elem(q);
         } else {
-            MUTEX_UNLOCK(handle->mutex);
+          YIELD();
-            sleep_ms(5);   // sleep for 5ms
         }
     }
 
@@ -189,24 +263,71 @@ static DWORD run(LPVOID arg)
 #endif
 }
 
-void *ao_create_async(void *ao_device_yeah, void *ao_play_f)
+int ao_async_version()
 {
-    //if (ao_play == NULL) { get_ao_play(); }
+  return VERSION;
+}
+
+#ifdef _WIN32
+#else
+#include <dlfcn.h>
+#endif
+
+#ifdef _WIN32
+static void at_exit_shutdown_ao(void)
+#else
+static void at_exit_shutdown_ao()
+#endif
+{
+  ao_shutdown();
+}
+
+static void init_ao()
+{
+  static int init = 0;
+  if (!init) {
+    ao_initialize();
+    atexit(at_exit_shutdown_ao);
+  }
+}
+
+void *ao_create_async(int bits, int rate, int channels, int byte_format)
+{
+    init_ao();
 
     AO_Handle *handle = (AO_Handle *) malloc(sizeof(AO_Handle));
 
-    handle->ao_device = (ao_device *) ao_device_yeah;
+    ao_sample_format fmt;
+    fmt.bits = bits;
+    fmt.rate = rate;
+    fmt.byte_format = byte_format;
+    fmt.channels = channels;
+    fmt.matrix = NULL;
+
+    ao_device *dev = ao_open_live(ao_default_driver_id(), &fmt, NULL);
+    if (dev == NULL) {
+      fprintf(stderr, "Cannot open ao-device, error code = %d\n", errno);
+      return NULL;
+    }
+
+    handle->ao_device = dev;
     handle->play_queue = NULL;
     handle->last_frame = NULL;
     handle->at_second = -1;
+    handle->at_music_id = -1;
 
-    handle->ao_play_f = ao_play_f;
     handle->buf_size = 0;
+
     handle->paused = (1 == 0);
 
 #ifdef USE_PTHREADS
+    pthread_mutex_t p = PTHREAD_MUTEX_INITIALIZER;
+    handle->pause_mutex = p;
+    pthread_mutex_t c = PTHREAD_MUTEX_INITIALIZER;
+    handle->clear_mutex = c;
     pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
     handle->mutex = m;
+    sem_init(&handle->queue_sem, 0, 0);
     pthread_create(&handle->thread, NULL, run, handle);
 #endif
 
@@ -214,21 +335,38 @@ void *ao_create_async(void *ao_device_yeah, void *ao_play_f)
     handle->mutex = CreateMutex(NULL,              // default security attributes
                                 FALSE,             // initially not owned
                                 NULL);
+    handle->pause_mutex = CreateMutex(NULL,              // default security attributes
+                                FALSE,             // initially not owned
+                                NULL);
+    handle->clear_mutex = CreateMutex(NULL,
+                                      FALSE,
+                                      NULL);
+    handle->queue_sem = CreateSemaphore(NULL, 0, 1000000, NULL);
     handle->thread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) run, handle, 0, &handle->thread_id);
 #endif
 
+    MUTEX_UNLOCK(handle->pause_mutex);
+    MUTEX_UNLOCK(handle->clear_mutex);
+
     return (void *) handle;
 }
 
 void ao_stop_async(void *ao_handle)
 {
     AO_Handle *h = (AO_Handle *) ao_handle;
+    fprintf(stderr, "stopping ao_async, calling clear\n");
 
-    MUTEX_LOCK(h->mutex);
     clear(h);
-    Queue_t *q = new_elem(STOP, 0.0, 0.0, 0, NULL);
+
+    fprintf(stderr, "queue cleared\n");
+
+    if (h->paused) {
+      MUTEX_UNLOCK(h->pause_mutex);
+    }
+    Queue_t *q = new_elem(STOP, 0, 0.0, 0.0, 0, NULL);
     add(h, q);
-    MUTEX_UNLOCK(h->mutex);
+
+    fprintf(stderr, "stop command queued\n");
 
 #ifdef USE_PTHREADS
     void *retval;
@@ -239,24 +377,148 @@ void ao_stop_async(void *ao_handle)
     CloseHandle(h->thread);
     CloseHandle(h->mutex);
 #endif
+    ao_close(h->ao_device);
+
+    fprintf(stderr, "device closed\n");
+
     free(h);
+
+    fprintf(stderr, "async handle freed\n");
 }
 
-void ao_play_async(void *ao_handle, double at_second, double music_duration, int buf_size, void *mem)
+/*
+(define (abs x) (if (>= x 0) x (* x -1)))
+
+(define (make-sample-bytes sample bytes-per-sample endianess)
+  (letrec ((mk (lambda (i d)
+                 (if (< i bytes-per-sample)
+                     (cons (bitwise-and d 255)
+                           (mk (+ i 1) (arithmetic-shift d -8)))
+                     '()))))
+    (let ((bytes (mk 0 sample)))
+      (if (eq? endianess 'big-endian)
+          (reverse bytes)
+          bytes))))
+
+         ;(get-sample (lambda (k channel)
+         ;              (let ((chan-buf (list-ref buffer channel)))
+         ;                (vector-ref chan-buf k))))
+         )
+    ;(letrec ((i 0)
+    ;         (fill (lambda (k channel)
+    ;                 (if (< k buf-len)
+    ;                     (if (< channel channels)
+    ;                         (let* ((sample (get-sample k channel))
+    ;                                (bytes (make-sample-bytes sample bytes-per-sample endianess))
+    ;                                )
+    ;                           (for-each (lambda (byte)
+    ;                                       (ptr-set! audio _byte i byte)
+    ;                                       (set! i (+ i 1)))
+    ;                                     bytes)
+    ;                           ;; process sample
+    ;                           (fill k (+ channel 1)))
+    ;                         (fill (+ k 1) 0))
+    ;                     'filled))
+    ;               ))
+    ;  (fill 0 0)
+
+*/
+
+#define AO_FMT_LITTLE 1
+#define AO_FMT_BIG    2
+#define AO_FMT_NATIVE 4
+
+static inline void make_sample_bytes(int32_t sample, int bytes_per_sample, int endianess, unsigned char b[4])
+{
+  int i;
+  for (i = 0; i < bytes_per_sample; i++) {
+     b[i] = sample&0xff;
+     sample = sample >> 8;
+  }
+  if (endianess == AO_FMT_BIG) {
+     unsigned char b1[4] = { 0, 0, 0, 0 };
+     for(i = 0; i < bytes_per_sample; i++) {
+        b1[bytes_per_sample - i - 1] = b[i];
+     }
+     for(i = 0; i < bytes_per_sample; i++) {
+        b[i] = b1[i];
+     }
+  }
+}
+
+void *convertFlac(void *mem, int buf_len, BufferInfo_t *info, int *audio_size)
+{
+  // buf_size equals number of samples of 32bit for all channels. So buf_size for flac = 4 * buf_len * channels
+
+  int bytes = info->sample_bits / 8;
+  int endianness = info->endiannes;
+  int store_size = info->channels * bytes * buf_len;
+  unsigned char *new_mem = (unsigned char *) malloc(store_size);
+  *audio_size = store_size;
+  int32_t **buffer = (int32_t **) mem;
+  int i, k, channel;
+
+  i = 0;
+  for(k = 0; k < buf_len; k++) {
+    for(channel = 0; channel < info->channels; channel++) {
+      int32_t *chan = buffer[channel];
+      int32_t sample = chan[k];
+      unsigned char b[4];
+      make_sample_bytes(sample, bytes, endianness, b);
+      for(int j = 0; j < bytes; j++) {
+        new_mem[i++] = b[j];
+      }
+    }
+  }
+
+  return (void *) new_mem;
+}
+
+void ao_play_async(void *ao_handle, int music_id, double at_second, double music_duration, int buf_size, void *mem, BufferInfo_t info)
 {
     AO_Handle *h = (AO_Handle *) ao_handle;
-    Queue_t *q = new_elem(PLAY, at_second, music_duration, buf_size, mem);
+
-    MUTEX_LOCK(h->mutex);
+    Queue_t *q = NULL;
+
+    switch(info.type) {
+      case flac: {
+        int store_size = 0;
+        void *store_mem = convertFlac(mem, buf_size, &info, &store_size);
+        q = new_elem(PLAY, music_id, at_second, music_duration, store_size, store_mem);
+        free(store_mem);
+      }
+      break;
+      case ao: {
+        q = new_elem(PLAY, music_id, at_second, music_duration, buf_size, mem);
+      }
+      break;
+      case mpg123: {
+        static int warned = 0;
+        if (!warned) {
+          warned = 1;
+          fprintf(stderr, "format mpg123 not supported yet\n");
+        }
+        return;
+      }
+      break;
+      case ao_ogg: {
+        static int warned = 0;
+        if (!warned) {
+          warned = 1;
+          fprintf(stderr, "format ao_ogg not supported yet\n");
+        }
+        return;
+      }
+      break;
+    }
+
     add(h, q);
-    MUTEX_UNLOCK(h->mutex);
 }
 
 void ao_clear_async(void *ao_handle)
 {
     AO_Handle *h = (AO_Handle *) ao_handle;
-    MUTEX_LOCK(h->mutex);
     clear(h);
-    MUTEX_UNLOCK(h->mutex);
 }
 
 double ao_is_at_second_async(void *ao_handle)
@@ -268,6 +530,15 @@ double ao_is_at_second_async(void *ao_handle)
     return s;
 }
 
+int ao_is_at_music_id_async(void *ao_handle)
+{
+    AO_Handle *h = (AO_Handle *) ao_handle;
+    MUTEX_LOCK(h->mutex);
+    int s = h->at_music_id;
+    MUTEX_UNLOCK(h->mutex);
+    return s;
+}
+
 double ao_music_duration_async(void *ao_handle)
 {
     AO_Handle *h = (AO_Handle *) ao_handle;
@@ -290,7 +561,19 @@ void ao_pause_async(void *ao_handle, int paused)
 {
     AO_Handle *h = (AO_Handle *) ao_handle;
     MUTEX_LOCK(h->mutex);
+
+    if (h->paused) {
+      if (!paused) {
         h->paused = paused;
+        MUTEX_UNLOCK(h->pause_mutex);
+      }
+    } else {
+      if (paused) {
+        h->paused = paused;
+        MUTEX_LOCK(h->pause_mutex);
+      }
+    }
+
     MUTEX_UNLOCK(h->mutex);
 }
 

ao-play-async/ao_playasync.h

@@ -11,12 +11,31 @@
 #define AOPLAYASYNC_EXPORT extern
 #endif
 
-AOPLAYASYNC_EXPORT void *ao_create_async(void *ao_handle, void *ao_play_f);
+#define VERSION 2
+
+typedef enum {
+    ao = 1,
+    flac = 2,
+    mpg123 = 3,
+    ao_ogg = 4
+} BufferType_t;
+
+typedef struct {
+    BufferType_t type;
+    int          sample_bits;
+    int          sample_rate;
+    int          channels;
+    int          endiannes;
+} BufferInfo_t;
+
+AOPLAYASYNC_EXPORT int ao_async_version(void);
+AOPLAYASYNC_EXPORT void *ao_create_async(int bits, int rate, int channels, int byte_format);
 AOPLAYASYNC_EXPORT void ao_stop_async(void *handle);
-AOPLAYASYNC_EXPORT void ao_play_async(void *handle, double at_second, double music_duration, int buf_size, void *mem);
+AOPLAYASYNC_EXPORT void ao_play_async(void *handle, int music_id, double at_second, double music_duration, int buf_size, void *mem, BufferInfo_t info);
 AOPLAYASYNC_EXPORT void ao_clear_async(void *handle);
 
 AOPLAYASYNC_EXPORT double ao_is_at_second_async(void *handle);
+AOPLAYASYNC_EXPORT int ao_is_at_music_id_async(void *handle);
 AOPLAYASYNC_EXPORT double ao_music_duration_async(void *handle);
 
 AOPLAYASYNC_EXPORT void ao_pause_async(void *ao_handle, int paused);

ao-play-async/windows/ao/ao.h

@@ -0,0 +1,151 @@
+/*
+ *
+ *  ao.h 
+ *
+ *	Original Copyright (C) Aaron Holtzman - May 1999
+ *      Modifications Copyright (C) Stan Seibert - July 2000, July 2001
+ *      More Modifications Copyright (C) Jack Moffitt - October 2000
+ *
+ *  This file is part of libao, a cross-platform audio outputlibrary.  See
+ *  README for a history of this source code.
+ *
+ *  libao 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, or (at your option)
+ *  any later version.
+ *
+ *  libao 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 GNU Make; see the file COPYING.  If not, write to
+ *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+#ifndef __AO_H__
+#define __AO_H__
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include "os_types.h"
+
+/* --- Exporting functions ---*/
+
+#ifdef _WIN32
+   #ifdef AO_BUILDING_LIBAO
+      #define AO_EXPORT __declspec(dllexport)
+   #else
+      #define AO_EXPORT __declspec(dllimport)
+   #endif
+#else
+  #define AO_EXPORT
+#endif
+
+/* --- Constants ---*/
+
+#define AO_TYPE_LIVE 1
+#define AO_TYPE_FILE 2
+
+
+#define AO_ENODRIVER   1
+#define AO_ENOTFILE    2
+#define AO_ENOTLIVE    3
+#define AO_EBADOPTION  4
+#define AO_EOPENDEVICE 5
+#define AO_EOPENFILE   6
+#define AO_EFILEEXISTS 7
+#define AO_EBADFORMAT  8
+
+#define AO_EFAIL       100
+
+
+#define AO_FMT_LITTLE 1
+#define AO_FMT_BIG    2
+#define AO_FMT_NATIVE 4
+
+/* --- Structures --- */
+
+typedef struct ao_info {
+	int  type; /* live output or file output? */
+	char *name; /* full name of driver */
+	char *short_name; /* short name of driver */
+        char *author; /* driver author */
+	char *comment; /* driver comment */
+	int  preferred_byte_format;
+	int  priority;
+	char **options;
+	int  option_count;
+} ao_info;
+
+typedef struct ao_functions ao_functions;
+typedef struct ao_device ao_device;
+
+typedef struct ao_sample_format {
+	int  bits; /* bits per sample */
+	int  rate; /* samples per second (in a single channel) */
+	int  channels; /* number of audio channels */
+	int  byte_format; /* Byte ordering in sample, see constants below */
+        char *matrix; /* input channel location/ordering */
+} ao_sample_format;
+
+typedef struct ao_option {
+	char *key;
+	char *value;
+	struct ao_option *next;
+} ao_option;
+
+#if defined(AO_BUILDING_LIBAO)
+#include "ao_private.h"
+#endif
+
+/* --- Functions --- */
+
+/* library setup/teardown */
+AO_EXPORT void ao_initialize(void);
+AO_EXPORT void ao_shutdown(void);
+
+/* device setup/playback/teardown */
+AO_EXPORT int   ao_append_global_option(const char *key,
+                                        const char *value);
+AO_EXPORT int          ao_append_option(ao_option **options,
+                                        const char *key,
+                                        const char *value);
+AO_EXPORT void          ao_free_options(ao_option *options);
+AO_EXPORT ao_device*       ao_open_live(int driver_id,
+                                        ao_sample_format *format,
+                                        ao_option *option);
+AO_EXPORT ao_device*       ao_open_file(int driver_id,
+                                        const char *filename,
+                                        int overwrite,
+                                        ao_sample_format *format,
+                                        ao_option *option);
+
+AO_EXPORT int                   ao_play(ao_device *device,
+                                        char *output_samples,
+                                        uint_32 num_bytes);
+AO_EXPORT int                  ao_close(ao_device *device);
+
+/* driver information */
+AO_EXPORT int              ao_driver_id(const char *short_name);
+AO_EXPORT int      ao_default_driver_id(void);
+AO_EXPORT ao_info       *ao_driver_info(int driver_id);
+AO_EXPORT ao_info **ao_driver_info_list(int *driver_count);
+AO_EXPORT const char *ao_file_extension(int driver_id);
+
+/* miscellaneous */
+AO_EXPORT int          ao_is_big_endian(void);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif  /* __AO_H__ */

ao-play-async/windows/ao/os_types.h

@@ -0,0 +1,10 @@
+#pragma once
+#include <stdint.h>
+
+typedef uint8_t  uint_8;
+typedef uint16_t uint_16;
+typedef uint32_t uint_32;
+typedef int8_t   sint_8;
+typedef int16_t  sint_16;
+typedef int32_t  sint_32;
+

src/Building Win32.txt

@@ -0,0 +1,17 @@
+Building for Win32.
+
+Extract the taglib sources.
+
+Add this in CMakeLists.txt:
+
+set(ZLIB_LIBRARY "c:/devel/libraries/nwin64/lib/zlib.lib")
+set(ZLIB_INCLUDE_DIR "c:/devel/libraries/nwin64/include")
+set(BUILD_TESTING OFF)
+set(BUILD_SHARED_LIBS ON)
+
+Or any place you have zlib.lib stored.
+
+Copy the shared libraries to ../lib/windows_<arch>/
+
+
+

src/Makefile

@@ -0,0 +1,15 @@
+
+TAGLIB=taglib-2.2.1
+
+all:
+	tar xf ${TAGLIB}.tar.gz
+	SUBDIR=`racket -e "(display (format \"~a-~a\" (system-type 'os*) (system-type 'arch)))"`; \
+	(cd ${TAGLIB};  cmake -DBUILD_SHARED_LIBS=ON -DCMAKE_INSTALL_PREFIX=../lib/$$SUBDIR -DCMAKE_BUILD_TYPE=Release .)
+	(cd ${TAGLIB}; make)
+	(cd ${TAGLIB}; make install)
+	SUBDIR=`racket -e "(display (format \"~a-~a\" (system-type 'os*) (system-type 'arch)))"`; \
+	(cd lib/$$SUBDIR/lib; tar cf - *so *.so.*) | (cd ../lib/$$SUBDIR; tar xvf - )
+
+clean:
+	rm -rf ${TAGLIB}
+	rm -rf lib