Add Win32 GAUDIN driver.

3 files changed, 247 insertions, 0 deletions

diff --git a/drivers/gaudin/Win32/gaudin_lld.c b/drivers/gaudin/Win32/gaudin_lld.c
new file mode 100644
index 00000000..665c89f7
--- /dev/null
+++ b/drivers/gaudin/Win32/gaudin_lld.c
@@ -0,0 +1,178 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+/**
+ * @file    drivers/gaudin/Win32/gaudin_lld.c
+ * @brief   GAUDIN - Driver file for Win32.
+ */
+
+#include "gfx.h"
+
+#if GFX_USE_GAUDIN
+
+/* Include the driver defines */
+#include "gaudin/lld/gaudin_lld.h"
+
+#undef Red
+#undef Green
+#undef Blue
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <stdio.h>
+#include <mmsystem.h>
+
+static HWAVEIN		ah;
+static volatile int	nUsedBuffers;
+static WAVEHDR		*pWaveHdrs;
+static HANDLE		waveInThread;
+static DWORD		threadID;
+
+/*
+static void PrintWaveErrorMsg(DWORD err, TCHAR * str)
+{
+	#define BUFFERSIZE 128
+	char	buffer[BUFFERSIZE];
+
+	fprintf(stderr, "GAUDIN: ERROR 0x%08X: %s\r\n", err, str);
+	if (mciGetErrorString(err, &buffer[0], sizeof(buffer)))
+		fprintf(stderr, "%s\r\n", &buffer[0]);
+	else
+		fprintf(stderr, "0x%08X returned!\r\n", err);
+}
+*/
+
+/**************************** waveInProc() *******************************
+ * We don't use CALLBACK_FUNCTION because it is restricted to calling only
+ * a few particular Windows functions, namely some of the time functions,
+ * and a few of the Low Level MIDI API. If you violate this rule, your app can
+ * hang inside of the callback). One of the Windows API that a callback can't
+ * call is waveInAddBuffer() which is what we need to use whenever we receive a
+ * MM_WIM_DATA. My callback would need to defer that job to another thread
+ * anyway, so instead just use CALLBACK_THREAD here instead.
+ *************************************************************************/
+
+DWORD WINAPI waveInProc(LPVOID arg) {
+	MSG		msg;
+	bool_t	isRecording;
+	(void)	arg;
+
+	isRecording = FALSE;
+	while (GetMessage(&msg, 0, 0, 0)) {
+		switch (msg.message) {
+			case MM_WIM_DATA:
+				GAUDIN_ISR_CompleteI((audin_sample_t *)((WAVEHDR *)msg.lParam)->lpData, ((WAVEHDR *)msg.lParam)->dwBytesRecorded/sizeof(audin_sample_t));
+
+				/* Are we still recording? */
+				if (isRecording) {
+					/* Yes. Now we need to requeue this buffer so the driver can use it for another block of audio
+					 * data. NOTE: We shouldn't need to waveInPrepareHeader() a WAVEHDR that has already been prepared once.
+					 * Note: We are assuming here that both the application can still access the buffer while
+					 * it is on the queue.
+					 */
+					waveInAddBuffer(ah, (WAVEHDR *)msg.lParam, sizeof(WAVEHDR));
+
+				} else {
+					/* We aren't recording, so another WAVEHDR has been returned to us after recording has stopped.
+					 * When we get all of them back, DoneAll will be equal to how many WAVEHDRs we queued
+					 */
+					nUsedBuffers--;
+					waveInUnprepareHeader(ah, (WAVEHDR *)msg.lParam, sizeof(WAVEHDR));
+				}
+
+                break;
+
+			case MM_WIM_OPEN:
+				isRecording = TRUE;
+                break;
+
+			case MM_WIM_CLOSE:
+				isRecording = FALSE;
+				break;
+		}
+	}
+	return 0;
+}
+
+/*===========================================================================*/
+/* External declarations.                                                    */
+/*===========================================================================*/
+
+void gaudin_lld_init(const gaudin_params *paud) {
+//	uint16_t		channel;
+//	uint32_t		frequency;
+//	audin_sample_t	*buffer;
+//	size_t			bufcount;
+//	size_t			samplesPerEvent;
+	WAVEFORMATEX	wfx;
+	size_t			spaceleft;
+	audin_sample_t	*p;
+	WAVEHDR			*phdr;
+	size_t			nBuffers;
+	size_t			sz;
+
+	if (!waveInThread) {
+		if (!(waveInThread = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)waveInProc, 0, 0, &threadID))) {
+			fprintf(stderr, "GAUDIN: Can't create WAVE recording thread\n");
+			return;
+		}
+		CloseHandle(waveInThread);
+	}
+
+	nUsedBuffers = 0;
+
+	wfx.wFormatTag = WAVE_FORMAT_PCM;
+	wfx.nChannels = paud->channel == GAUDIN_STEREO ? 2 : 1;
+	wfx.nSamplesPerSec = paud->frequency;
+	wfx.nBlockAlign = wfx.nChannels * sizeof(audin_sample_t);
+	wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nBlockAlign;
+	wfx.wBitsPerSample = sizeof(audin_sample_t) * 8;
+	wfx.cbSize = 0;
+
+	if (waveInOpen(&ah, WAVE_MAPPER, &wfx, (DWORD_PTR)threadID, (DWORD_PTR)paud, CALLBACK_THREAD)) {
+		fprintf(stderr, "GAUDIN: Can't open WAVE recording device\n");
+		return;
+	}
+
+	/* We need to allocate a wave header for each buffer */
+	nBuffers = (paud->bufcount + paud->samplesPerEvent - 1) / paud->samplesPerEvent;
+	if (!(pWaveHdrs = (WAVEHDR *)gfxAlloc(nBuffers * sizeof(WAVEHDR)))) {
+		fprintf(stderr, "GAUDIN: Buffer header allocation failed\n");
+		return;
+	}
+
+	/* Prepare each buffer and send to the wavein device */
+	spaceleft = paud->bufcount;
+	for(p = paud->buffer, phdr = pWaveHdrs, spaceleft = paud->bufcount; spaceleft; p += sz, phdr++, spaceleft -= sz) {
+		sz = spaceleft > paud->samplesPerEvent ? paud->samplesPerEvent : spaceleft;
+		phdr->dwBufferLength = sz * sizeof(audin_sample_t);
+		phdr->lpData = (LPSTR)p;
+		phdr->dwFlags = 0;
+		if (!waveInPrepareHeader(ah, phdr, sizeof(WAVEHDR))
+				&& !waveInAddBuffer(ah, phdr, sizeof(WAVEHDR)))
+			nUsedBuffers++;
+		else
+			fprintf(stderr, "GAUDIN: Buffer prepare failed\n");
+	}
+	if (!nUsedBuffers)
+		fprintf(stderr, "GAUDIN: Failed to prepare any buffers\n");
+}
+
+void gadc_lld_start(void) {
+	if (nUsedBuffers)
+		waveInStart(ah);
+}
+
+void gadc_lld_stop(void) {
+	waveInReset(ah);
+	while(nUsedBuffers) Sleep(1);
+	if (pWaveHdrs) {
+		gfxFree(pWaveHdrs);
+		pWaveHdrs = 0;
+	}
+}
+
+#endif /* GFX_USE_GAUDIN */
diff --git a/drivers/gaudin/Win32/gaudin_lld.mk b/drivers/gaudin/Win32/gaudin_lld.mk
new file mode 100644
index 00000000..3a822971
--- /dev/null
+++ b/drivers/gaudin/Win32/gaudin_lld.mk
@@ -0,0 +1,5 @@
+# List the required driver.
+GFXSRC += $(GFXLIB)/drivers/gaudin/Win32/gaudin_lld.c
+
+# Required include directories
+GFXINC += $(GFXLIB)/drivers/gaudin/Win32
diff --git a/drivers/gaudin/Win32/gaudin_lld_config.h b/drivers/gaudin/Win32/gaudin_lld_config.h
new file mode 100644
index 00000000..804d2fc4
--- /dev/null
+++ b/drivers/gaudin/Win32/gaudin_lld_config.h
@@ -0,0 +1,64 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+/**
+ * @file    drivers/multiple/Win32/gaudin_lld_config.h
+ * @brief   GAUDIN Driver config file.
+ *
+ * @addtogroup GAUDIN
+ * @{
+ */
+
+#ifndef GAUDIN_LLD_CONFIG_H
+#define GAUDIN_LLD_CONFIG_H
+
+#if GFX_USE_GAUDIN
+
+/*===========================================================================*/
+/* Driver hardware support.                                                  */
+/*===========================================================================*/
+
+/**
+ * @brief	The audio input sample type
+ */
+//typedef uint8_t		audin_sample_t;
+typedef int16_t		audin_sample_t;
+
+/**
+ * @brief	The maximum sample frequency supported by this audio device
+ */
+#define GAUDIN_MAX_SAMPLE_FREQUENCY			44100
+
+/**
+ * @brief	The number of bits in a sample
+ */
+//#define GAUDIN_BITS_PER_SAMPLE				8
+#define GAUDIN_BITS_PER_SAMPLE				16
+
+/**
+ * @brief	The format of an audio sample
+ */
+//#define GAUDIN_SAMPLE_FORMAT				ARRAY_DATA_8BITUNSIGNED
+#define GAUDIN_SAMPLE_FORMAT				ARRAY_DATA_16BITSIGNED
+
+/**
+ * @brief	The number of audio channels supported by this driver
+ */
+#define GAUDIN_NUM_CHANNELS					2
+
+/**
+ * @brief	The list of audio channels and their uses
+ * @{
+ */
+#define	GAUDIN_MONO							0
+#define	GAUDIN_STEREO						1
+/** @} */
+
+#endif	/* GFX_USE_GAUDIN */
+
+#endif	/* GAUDIN_LLD_CONFIG_H */
+/** @} */