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Sweden-Number/dlls/wineoss.drv/midi.c

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/*
* MIDI driver for OSS (PE-side)
*
* Copyright 1994 Martin Ayotte
* Copyright 1998 Luiz Otavio L. Zorzella (init procedures)
* Copyright 1998, 1999 Eric POUECH
* Copyright 2022 Huw Davies
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
/* TODO:
* + use better instrument definition for OPL/2 (midiPatch.c) or
* use existing instrument definition (from playmidi or kmid)
* with a .winerc option
* + have a look at OPL/3 ?
* + implement asynchronous playback of MidiHdr
* + implement STREAM'ed MidiHdr (question: how shall we share the
* code between the midiStream functions in MMSYSTEM/WINMM and
* the code for the low level driver)
* + use a more accurate read mechanism than the one of snooping on
* timers (like select on fd)
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <poll.h>
#include <sys/soundcard.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winternl.h"
#include "mmddk.h"
#include "audioclient.h"
#include "wine/debug.h"
#include "wine/unixlib.h"
#include "unixlib.h"
WINE_DEFAULT_DEBUG_CHANNEL(midi);
static WINE_MIDIIN *MidiInDev;
/* this is the total number of MIDI out devices found */
static int MIDM_NumDevs = 0;
static int numStartedMidiIn = 0;
static int end_thread;
static HANDLE hThread;
/*======================================================================*
* Low level MIDI implementation *
*======================================================================*/
static int midiOpenSeq(void);
static int midiCloseSeq(int);
static int MIDI_loadcount;
/**************************************************************************
* OSS_MidiInit [internal]
*
* Initializes the MIDI devices information variables
*/
static LRESULT OSS_MidiInit(void)
{
struct midi_init_params params;
UINT err;
TRACE("(%i)\n", MIDI_loadcount);
if (MIDI_loadcount++)
return 1;
TRACE("Initializing the MIDI variables.\n");
params.err = &err;
OSS_CALL(midi_init, &params);
if (!err)
{
MidiInDev = params.srcs;
MIDM_NumDevs = params.num_srcs;
}
return err;
}
/**************************************************************************
* OSS_MidiExit [internal]
*
* Release the MIDI devices information variables
*/
static LRESULT OSS_MidiExit(void)
{
TRACE("(%i)\n", MIDI_loadcount);
if (--MIDI_loadcount)
return 1;
MidiInDev = NULL;
MIDM_NumDevs = 0;
return 0;
}
static void in_buffer_lock(void)
{
OSS_CALL(midi_in_lock, ULongToPtr(1));
}
static void in_buffer_unlock(void)
{
OSS_CALL(midi_in_lock, ULongToPtr(0));
}
static void notify_client(struct notify_context *notify)
{
TRACE("dev_id = %d msg = %d param1 = %04lX param2 = %04lX\n",
notify->dev_id, notify->msg, notify->param_1, notify->param_2);
DriverCallback(notify->callback, notify->flags, notify->device, notify->msg,
notify->instance, notify->param_1, notify->param_2);
}
/**************************************************************************
* MIDI_NotifyClient [internal]
*/
static void MIDI_NotifyClient(UINT wDevID, WORD wMsg,
DWORD_PTR dwParam1, DWORD_PTR dwParam2)
{
DWORD_PTR dwCallBack;
UINT uFlags;
HANDLE hDev;
DWORD_PTR dwInstance;
TRACE("wDevID = %04X wMsg = %d dwParm1 = %04lX dwParam2 = %04lX\n",
wDevID, wMsg, dwParam1, dwParam2);
switch (wMsg) {
case MIM_OPEN:
case MIM_CLOSE:
case MIM_DATA:
case MIM_LONGDATA:
case MIM_ERROR:
case MIM_LONGERROR:
case MIM_MOREDATA:
if (wDevID > MIDM_NumDevs) return;
dwCallBack = MidiInDev[wDevID].midiDesc.dwCallback;
uFlags = MidiInDev[wDevID].wFlags;
hDev = MidiInDev[wDevID].midiDesc.hMidi;
dwInstance = MidiInDev[wDevID].midiDesc.dwInstance;
break;
default:
ERR("Unsupported MSW-MIDI message %u\n", wMsg);
return;
}
DriverCallback(dwCallBack, uFlags, hDev, wMsg, dwInstance, dwParam1, dwParam2);
}
/**************************************************************************
* midiOpenSeq [internal]
*/
static int midiOpenSeq(void)
{
struct midi_seq_open_params params;
params.close = 0;
params.fd = -1;
OSS_CALL(midi_seq_open, &params);
return params.fd;
}
/**************************************************************************
* midiCloseSeq [internal]
*/
static int midiCloseSeq(int fd)
{
struct midi_seq_open_params params;
params.close = 1;
params.fd = fd;
OSS_CALL(midi_seq_open, &params);
return 0;
}
static void handle_sysex_data(struct midi_src *src, unsigned char value, UINT time)
{
MIDIHDR *hdr;
BOOL done = FALSE;
src->state |= 2;
src->incLen = 0;
in_buffer_lock();
hdr = src->lpQueueHdr;
if (hdr)
{
BYTE *data = (BYTE *)hdr->lpData;
data[hdr->dwBytesRecorded++] = value;
if (hdr->dwBytesRecorded == hdr->dwBufferLength)
done = TRUE;
}
if (value == 0xf7) /* end */
{
src->state &= ~2;
done = TRUE;
}
if (done && hdr)
{
src->lpQueueHdr = hdr->lpNext;
hdr->dwFlags &= ~MHDR_INQUEUE;
hdr->dwFlags |= MHDR_DONE;
MIDI_NotifyClient(src - MidiInDev, MIM_LONGDATA, (UINT_PTR)hdr, time);
}
in_buffer_unlock();
}
static void handle_regular_data(struct midi_src *src, unsigned char value, UINT time)
{
UINT to_send = 0;
#define IS_CMD(_x) (((_x) & 0x80) == 0x80)
#define IS_SYS_CMD(_x) (((_x) & 0xF0) == 0xF0)
if (!IS_CMD(value) && src->incLen == 0) /* try to reuse old cmd */
{
if (IS_CMD(src->incPrev) && !IS_SYS_CMD(src->incPrev))
{
src->incoming[0] = src->incPrev;
src->incLen = 1;
}
else
{
/* FIXME: should generate MIM_ERROR notification */
return;
}
}
src->incoming[(int)src->incLen++] = value;
if (src->incLen == 1 && !IS_SYS_CMD(src->incoming[0]))
/* store new cmd, just in case */
src->incPrev = src->incoming[0];
#undef IS_CMD
#undef IS_SYS_CMD
switch (src->incoming[0] & 0xF0)
{
case MIDI_NOTEOFF:
case MIDI_NOTEON:
case MIDI_KEY_PRESSURE:
case MIDI_CTL_CHANGE:
case MIDI_PITCH_BEND:
if (src->incLen == 3)
to_send = (src->incoming[2] << 16) | (src->incoming[1] << 8) |
src->incoming[0];
break;
case MIDI_PGM_CHANGE:
case MIDI_CHN_PRESSURE:
if (src->incLen == 2)
to_send = (src->incoming[1] << 8) | src->incoming[0];
break;
case MIDI_SYSTEM_PREFIX:
if (src->incLen == 1)
to_send = src->incoming[0];
break;
}
if (to_send)
{
src->incLen = 0;
MIDI_NotifyClient(src - MidiInDev, MIM_DATA, to_send, time);
}
}
static void handle_midi_data(unsigned char *buffer, unsigned int len)
{
unsigned int time = GetTickCount(), i;
struct midi_src *src;
unsigned char value;
WORD dev_id;
for (i = 0; i < len; i += (buffer[i] & 0x80) ? 8 : 4)
{
if (buffer[i] != SEQ_MIDIPUTC) continue;
dev_id = buffer[i + 2];
value = buffer[i + 1];
if (dev_id >= MIDM_NumDevs) continue;
src = MidiInDev + dev_id;
if (src->state <= 0) continue;
if (value == 0xf0 || src->state & 2) /* system exclusive */
handle_sysex_data(src, value, time - src->startTime);
else
handle_regular_data(src, value, time - src->startTime);
}
}
static DWORD WINAPI midRecThread(void *arg)
{
int fd = (int)(INT_PTR)arg;
unsigned char buffer[256];
int len;
struct pollfd pfd;
TRACE("Thread startup\n");
pfd.fd = fd;
pfd.events = POLLIN;
while(!end_thread) {
TRACE("Thread loop\n");
/* Check if an event is present */
if (poll(&pfd, 1, 250) <= 0)
continue;
len = read(fd, buffer, sizeof(buffer));
TRACE("Received %d bytes\n", len);
if (len < 0) continue;
if ((len % 4) != 0) {
WARN("Bad length %d, errno %d (%s)\n", len, errno, strerror(errno));
continue;
}
handle_midi_data(buffer, len);
}
return 0;
}
/**************************************************************************
* midOpen [internal]
*/
static DWORD midOpen(WORD wDevID, LPMIDIOPENDESC lpDesc, DWORD dwFlags)
{
int fd;
TRACE("(%04X, %p, %08X);\n", wDevID, lpDesc, dwFlags);
if (lpDesc == NULL) {
WARN("Invalid Parameter !\n");
return MMSYSERR_INVALPARAM;
}
/* FIXME :
* how to check that content of lpDesc is correct ?
*/
if (wDevID >= MIDM_NumDevs) {
WARN("wDevID too large (%u) !\n", wDevID);
return MMSYSERR_BADDEVICEID;
}
if (MidiInDev[wDevID].state == -1) {
WARN("device disabled\n");
return MIDIERR_NODEVICE;
}
if (MidiInDev[wDevID].midiDesc.hMidi != 0) {
WARN("device already open !\n");
return MMSYSERR_ALLOCATED;
}
if ((dwFlags & MIDI_IO_STATUS) != 0) {
WARN("No support for MIDI_IO_STATUS in dwFlags yet, ignoring it\n");
dwFlags &= ~MIDI_IO_STATUS;
}
if ((dwFlags & ~CALLBACK_TYPEMASK) != 0) {
FIXME("Bad dwFlags\n");
return MMSYSERR_INVALFLAG;
}
fd = midiOpenSeq();
if (fd < 0) {
return MMSYSERR_ERROR;
}
if (numStartedMidiIn++ == 0) {
end_thread = 0;
hThread = CreateThread(NULL, 0, midRecThread, (void *)(INT_PTR)fd, 0, NULL);
if (!hThread) {
numStartedMidiIn = 0;
WARN("Couldn't create thread for midi-in\n");
midiCloseSeq(fd);
return MMSYSERR_ERROR;
}
SetThreadPriority(hThread, THREAD_PRIORITY_TIME_CRITICAL);
TRACE("Created thread for midi-in\n");
}
MidiInDev[wDevID].wFlags = HIWORD(dwFlags & CALLBACK_TYPEMASK);
MidiInDev[wDevID].lpQueueHdr = NULL;
MidiInDev[wDevID].midiDesc = *lpDesc;
MidiInDev[wDevID].state = 0;
MidiInDev[wDevID].incLen = 0;
MidiInDev[wDevID].startTime = 0;
MidiInDev[wDevID].fd = fd;
MIDI_NotifyClient(wDevID, MIM_OPEN, 0L, 0L);
return MMSYSERR_NOERROR;
}
/**************************************************************************
* midClose [internal]
*/
static DWORD midClose(WORD wDevID)
{
int ret = MMSYSERR_NOERROR;
TRACE("(%04X);\n", wDevID);
if (wDevID >= MIDM_NumDevs) {
WARN("wDevID too big (%u) !\n", wDevID);
return MMSYSERR_BADDEVICEID;
}
if (MidiInDev[wDevID].midiDesc.hMidi == 0) {
WARN("device not opened !\n");
return MMSYSERR_ERROR;
}
if (MidiInDev[wDevID].lpQueueHdr != 0) {
return MIDIERR_STILLPLAYING;
}
if (MidiInDev[wDevID].fd == -1) {
WARN("ooops !\n");
return MMSYSERR_ERROR;
}
if (--numStartedMidiIn == 0) {
TRACE("Stopping thread for midi-in\n");
end_thread = 1;
if (WaitForSingleObject(hThread, 5000) != WAIT_OBJECT_0) {
WARN("Thread end not signaled, force termination\n");
TerminateThread(hThread, 0);
}
TRACE("Stopped thread for midi-in\n");
}
midiCloseSeq(MidiInDev[wDevID].fd);
MidiInDev[wDevID].fd = -1;
MIDI_NotifyClient(wDevID, MIM_CLOSE, 0L, 0L);
MidiInDev[wDevID].midiDesc.hMidi = 0;
return ret;
}
/*======================================================================*
* MIDI entry points *
*======================================================================*/
/**************************************************************************
* midMessage (WINEOSS.@)
*/
DWORD WINAPI OSS_midMessage(UINT wDevID, UINT wMsg, DWORD_PTR dwUser,
DWORD_PTR dwParam1, DWORD_PTR dwParam2)
{
struct midi_in_message_params params;
struct notify_context notify;
UINT err;
TRACE("(%04X, %04X, %08lX, %08lX, %08lX);\n",
wDevID, wMsg, dwUser, dwParam1, dwParam2);
switch (wMsg) {
case DRVM_INIT:
return OSS_MidiInit();
case DRVM_EXIT:
return OSS_MidiExit();
case MIDM_OPEN:
return midOpen(wDevID, (LPMIDIOPENDESC)dwParam1, dwParam2);
case MIDM_CLOSE:
return midClose(wDevID);
}
params.dev_id = wDevID;
params.msg = wMsg;
params.user = dwUser;
params.param_1 = dwParam1;
params.param_2 = dwParam2;
params.err = &err;
params.notify = &notify;
do
{
OSS_CALL(midi_in_message, &params);
if ((!err || err == ERROR_RETRY) && notify.send_notify) notify_client(&notify);
} while (err == ERROR_RETRY);
return err;
}
/**************************************************************************
* modMessage (WINEOSS.@)
*/
DWORD WINAPI OSS_modMessage(UINT wDevID, UINT wMsg, DWORD_PTR dwUser,
DWORD_PTR dwParam1, DWORD_PTR dwParam2)
{
struct midi_out_message_params params;
struct notify_context notify;
UINT err;
TRACE("(%04X, %04X, %08lX, %08lX, %08lX);\n",
wDevID, wMsg, dwUser, dwParam1, dwParam2);
switch (wMsg) {
case DRVM_INIT:
return OSS_MidiInit();
case DRVM_EXIT:
return OSS_MidiExit();
}
params.dev_id = wDevID;
params.msg = wMsg;
params.user = dwUser;
params.param_1 = dwParam1;
params.param_2 = dwParam2;
params.err = &err;
params.notify = &notify;
OSS_CALL(midi_out_message, &params);
if (!err && notify.send_notify) notify_client(&notify);
return err;
}
/**************************************************************************
* DriverProc (WINEOSS.1)
*/
LRESULT CALLBACK OSS_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
LPARAM dwParam1, LPARAM dwParam2)
{
TRACE("(%08lX, %p, %08X, %08lX, %08lX)\n",
dwDevID, hDriv, wMsg, dwParam1, dwParam2);
switch(wMsg) {
case DRV_LOAD:
case DRV_FREE:
case DRV_OPEN:
case DRV_CLOSE:
case DRV_ENABLE:
case DRV_DISABLE:
case DRV_QUERYCONFIGURE:
case DRV_CONFIGURE:
return 1;
case DRV_INSTALL:
case DRV_REMOVE:
return DRV_SUCCESS;
default:
return 0;
}
}
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