asio: Drop external SDK header dependency

Build ASIO plugin using our tiny SDK header

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6404>

subprojects/gst-plugins-bad/meson_options.txt

@@ -92,7 +92,6 @@ option('amfcodec', type : 'feature', value : 'auto', description : 'AMD AMF code
 option('androidmedia', type : 'feature', value : 'auto', description : 'Video capture and codec plugins for Android')
 option('applemedia', type : 'feature', value : 'auto', description : 'Video capture and codec access plugins for macOS and iOS')
 option('asio', type : 'feature', value : 'auto', description : 'Steinberg Audio Streaming Input Output (ASIO) plugin')
-option('asio-sdk-path', type : 'string', value : '', description : 'Full path to Steinberg Audio Streaming Input Output (ASIO) SDK')
 option('assrender', type : 'feature', value : 'auto', description : 'ASS/SSA subtitle renderer plugin')
 option('bluez', type : 'feature', value : 'auto', description : 'Bluetooth audio A2DP/AVDTP sink, AVDTP source plugin')
 option('bs2b', type : 'feature', value : 'auto', description : 'Bauer stereophonic-to-binaural audio plugin')

subprojects/gst-plugins-bad/sys/asio/asio.h

@@ -0,0 +1,147 @@
+#pragma once
+
+#include <gst/gst.h>
+#include <windows.h>
+
+G_BEGIN_DECLS
+
+#pragma pack(push,4)
+
+typedef struct
+{
+  gulong hi;
+  gulong lo;
+} ASIOSamples;
+
+typedef struct
+{
+  gulong hi;
+  gulong lo;
+} ASIOTimeStamp;
+
+typedef gdouble ASIOSampleRate;
+typedef glong ASIOBool;
+typedef glong ASIOSampleType;
+
+enum {
+  ASIOSTInt16MSB = 0,
+  ASIOSTInt24MSB = 1,
+  ASIOSTInt32MSB = 2,
+  ASIOSTFloat32MSB = 3,
+  ASIOSTFloat64MSB = 4,
+
+  ASIOSTInt32MSB16 = 8,
+  ASIOSTInt32MSB18 = 9,
+  ASIOSTInt32MSB20 = 10,
+  ASIOSTInt32MSB24 = 11,
+
+  ASIOSTInt16LSB = 16,
+  ASIOSTInt24LSB = 17,
+  ASIOSTInt32LSB = 18,
+  ASIOSTFloat32LSB = 19,
+  ASIOSTFloat64LSB = 20,
+
+  ASIOSTInt32LSB16 = 24,
+  ASIOSTInt32LSB18 = 25,
+  ASIOSTInt32LSB20 = 26,
+  ASIOSTInt32LSB24 = 27,
+
+  ASIOSTDSDInt8LSB1 = 32,
+  ASIOSTDSDInt8MSB1 = 33,
+  ASIOSTDSDInt8NER8 = 40,
+
+  ASIOSTLastEntry
+};
+
+typedef glong ASIOError;
+
+typedef struct ASIOTimeCode
+{
+  gdouble speed;
+  ASIOSamples timeCodeSamples;
+  gulong  flags;
+  gchar future[64];
+} ASIOTimeCode;
+
+typedef struct AsioTimeInfo
+{
+  gdouble speed;
+  ASIOTimeStamp systemTime;
+  ASIOSamples samplePosition;
+  ASIOSampleRate sampleRate;
+  gulong flags;
+  gchar reserved[12];
+} AsioTimeInfo;
+
+typedef struct ASIOTime
+{
+  glong reserved[4];
+  AsioTimeInfo timeInfo;
+  ASIOTimeCode timeCode;
+} ASIOTime;
+
+typedef struct ASIOCallbacks
+{
+  void  (*bufferSwitch)             (glong doubleBufferIndex,
+                                     ASIOBool directProcess);
+  void  (*sampleRateDidChange)      (ASIOSampleRate sRate);
+  glong (*asioMessage)              (glong selector,
+                                     glong value,
+                                     gpointer message,
+                                     gdouble * opt);
+  ASIOTime* (*bufferSwitchTimeInfo) (ASIOTime* params,
+                                     glong doubleBufferIndex,
+                                     ASIOBool directProcess);
+} ASIOCallbacks;
+
+enum
+{
+  kAsioSelectorSupported = 1,
+  kAsioEngineVersion,
+  kAsioResetRequest,
+  kAsioBufferSizeChange,
+  kAsioResyncRequest,
+  kAsioLatenciesChanged,
+  kAsioSupportsTimeInfo,
+  kAsioSupportsTimeCode,
+  kAsioMMCCommand,
+  kAsioSupportsInputMonitor,
+  kAsioSupportsInputGain,
+  kAsioSupportsInputMeter,
+  kAsioSupportsOutputGain,
+  kAsioSupportsOutputMeter,
+  kAsioOverload,
+
+  kAsioNumMessageSelectors
+};
+
+typedef struct ASIOClockSource
+{
+  glong index;
+  glong associatedChannel;
+  glong associatedGroup;
+  ASIOBool isCurrentSource;
+  gchar name[32];
+} ASIOClockSource;
+
+typedef struct ASIOChannelInfo
+{
+  glong channel;
+  ASIOBool isInput;
+  ASIOBool isActive;
+  glong channelGroup;
+  ASIOSampleType type;
+  gchar name[32];
+} ASIOChannelInfo;
+
+typedef struct ASIOBufferInfo
+{
+  ASIOBool isInput;
+  glong channelNum;
+  gpointer buffers[2];
+} ASIOBufferInfo;
+
+#pragma pack(pop)
+
+G_END_DECLS
+

subprojects/gst-plugins-bad/sys/asio/gstasioobject.cpp

@@ -28,7 +28,6 @@
 #include <functional>
 #include <vector>
 #include <mutex>
-#include <iasiodrv.h>
 
 GST_DEBUG_CATEGORY_STATIC (gst_asio_object_debug);
 #define GST_CAT_DEFAULT gst_asio_object_debug
@@ -44,6 +43,38 @@ std::mutex global_lock;
 std::mutex slot_lock;
 /* *INDENT-ON* */
 
+/* ASIO COM interface */
+struct IASIO : public IUnknown
+{
+  virtual ASIOBool init (gpointer sysHandle) = 0;
+  virtual void getDriverName (gchar *name) = 0;
+  virtual glong getDriverVersion () = 0;
+  virtual void getErrorMessage (gchar * string) = 0;
+  virtual ASIOError start () = 0;
+  virtual ASIOError stop () = 0;
+  virtual ASIOError getChannels (glong * numInputChannels,
+      glong * numOutputChannels) = 0;
+  virtual ASIOError getLatencies (glong * inputLatency,
+      glong * outputLatency) = 0;
+  virtual ASIOError getBufferSize (glong *minSize, glong *maxSize,
+      glong * preferredSize, glong *granularity) = 0;
+  virtual ASIOError canSampleRate (ASIOSampleRate sampleRate) = 0;
+  virtual ASIOError getSampleRate (ASIOSampleRate * sampleRate) = 0;
+  virtual ASIOError setSampleRate (ASIOSampleRate sampleRate) = 0;
+  virtual ASIOError getClockSources (ASIOClockSource *clocks,
+      glong *numSources) = 0;
+  virtual ASIOError setClockSource (glong reference) = 0;
+  virtual ASIOError getSamplePosition (ASIOSamples * sPos,
+      ASIOTimeStamp *tStamp) = 0;
+  virtual ASIOError getChannelInfo (ASIOChannelInfo * info) = 0;
+  virtual ASIOError createBuffers (ASIOBufferInfo * bufferInfos,
+      glong numChannels, glong bufferSize, ASIOCallbacks * callbacks) = 0;
+  virtual ASIOError disposeBuffers () = 0;
+  virtual ASIOError controlPanel () = 0;
+  virtual ASIOError future (glong selector,gpointer opt) = 0;
+  virtual ASIOError outputReady () = 0;
+};
+
 static void gst_asio_object_buffer_switch (GstAsioObject * self,
     glong index, ASIOBool process_now);
 static void gst_asio_object_sample_rate_changed (GstAsioObject * self,

subprojects/gst-plugins-bad/sys/asio/gstasioutils.h

@@ -23,8 +23,7 @@
 #include <gst/gst.h>
 #include <gst/audio/audio.h>
 #include <windows.h>
-#include <asiosys.h>
-#include <asio.h>
+#include "asio.h"
 
 G_BEGIN_DECLS
 

subprojects/gst-plugins-bad/sys/asio/meson.build

@@ -47,35 +47,10 @@ if not winmm_lib.found()
   subdir_done ()
 endif
 
-# Checking SDK headers. User should install ASIO sdk on system, and
-# this plugin requires asio.h, asiosys.h and iasiodrv.h headers
-asio_sdk_root = get_option ('asio-sdk-path')
-if asio_sdk_root == ''
-  if asio_option.enabled()
-    error('asio sdk path is needed, pass with -Dasio-sdk-path=C:/path/to/sdk')
-  else
-    subdir_done ()
-  endif
-endif
-
-asio_inc_dir = include_directories(join_paths(asio_sdk_root, 'common'), is_system : true)
-has_asio_header = cxx.has_header('asio.h', include_directories: asio_inc_dir)
-has_asiosys_header = cxx.has_header('asiosys.h', include_directories: asio_inc_dir)
-has_iasiodrv_header = cxx.has_header('iasiodrv.h', include_directories: asio_inc_dir)
-if not has_asio_header or not has_asiosys_header or not has_iasiodrv_header
-  if asio_option.enabled()
-    error('Failed to find required SDK header(s)')
-  else
-    subdir_done ()
-  endif
-endif
-
-asio_deps = [gstaudio_dep, avrt_lib, winmm_lib]
-
 gstasio = library('gstasio',
     asio_sources,
-    include_directories : [configinc, asio_inc_dir],
-    dependencies : asio_deps,
+    include_directories : [configinc],
+    dependencies : [gstaudio_dep, avrt_lib, winmm_lib],
     c_args : gst_plugins_bad_args,
     cpp_args : gst_plugins_bad_args,
     install : true,