363 lines
9.1 KiB
C
363 lines
9.1 KiB
C
/**
|
|
* OpenAL cross platform audio library
|
|
* Copyright (C) 1999-2007 by authors.
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
* Or go to http://www.gnu.org/copyleft/lgpl.html
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <memory.h>
|
|
#include "alMain.h"
|
|
#include "AL/al.h"
|
|
#include "AL/alc.h"
|
|
|
|
|
|
typedef struct {
|
|
FILE *f;
|
|
long DataStart;
|
|
|
|
ALvoid *buffer;
|
|
ALuint size;
|
|
|
|
volatile int killNow;
|
|
ALvoid *thread;
|
|
} wave_data;
|
|
|
|
|
|
static const ALCchar waveDevice[] = "Wave File Writer";
|
|
|
|
static const ALubyte SUBTYPE_PCM[] = {
|
|
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xaa,
|
|
0x00, 0x38, 0x9b, 0x71
|
|
};
|
|
static const ALubyte SUBTYPE_FLOAT[] = {
|
|
0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xaa,
|
|
0x00, 0x38, 0x9b, 0x71
|
|
};
|
|
|
|
static const ALuint channel_masks[] = {
|
|
0, /* invalid */
|
|
0x4, /* Mono */
|
|
0x1 | 0x2, /* Stereo */
|
|
0, /* 3 channel */
|
|
0x1 | 0x2 | 0x10 | 0x20, /* Quad */
|
|
0, /* 5 channel */
|
|
0x1 | 0x2 | 0x4 | 0x8 | 0x10 | 0x20, /* 5.1 */
|
|
0x1 | 0x2 | 0x4 | 0x8 | 0x100 | 0x200 | 0x400, /* 6.1 */
|
|
0x1 | 0x2 | 0x4 | 0x8 | 0x10 | 0x20 | 0x200 | 0x400, /* 7.1 */
|
|
};
|
|
|
|
|
|
static void fwrite16le(ALushort val, FILE *f)
|
|
{
|
|
fputc(val&0xff, f);
|
|
fputc((val>>8)&0xff, f);
|
|
}
|
|
|
|
static void fwrite32le(ALuint val, FILE *f)
|
|
{
|
|
fputc(val&0xff, f);
|
|
fputc((val>>8)&0xff, f);
|
|
fputc((val>>16)&0xff, f);
|
|
fputc((val>>24)&0xff, f);
|
|
}
|
|
|
|
|
|
static ALuint WaveProc(ALvoid *ptr)
|
|
{
|
|
ALCdevice *pDevice = (ALCdevice*)ptr;
|
|
wave_data *data = (wave_data*)pDevice->ExtraData;
|
|
ALuint frameSize;
|
|
ALuint now, start;
|
|
ALuint64 avail, done;
|
|
size_t fs;
|
|
union {
|
|
short s;
|
|
char b[sizeof(short)];
|
|
} uSB;
|
|
const ALuint restTime = (ALuint64)pDevice->UpdateSize * 1000 /
|
|
pDevice->Frequency / 2;
|
|
|
|
uSB.s = 1;
|
|
frameSize = FrameSizeFromDevFmt(pDevice->FmtChans, pDevice->FmtType);
|
|
|
|
done = 0;
|
|
start = timeGetTime();
|
|
while(!data->killNow && pDevice->Connected)
|
|
{
|
|
now = timeGetTime();
|
|
|
|
avail = (ALuint64)(now-start) * pDevice->Frequency / 1000;
|
|
if(avail < done)
|
|
{
|
|
/* Timer wrapped. Add the remainder of the cycle to the available
|
|
* count and reset the number of samples done */
|
|
avail += (ALuint64)0xFFFFFFFFu*pDevice->Frequency/1000 - done;
|
|
done = 0;
|
|
}
|
|
if(avail-done < pDevice->UpdateSize)
|
|
{
|
|
Sleep(restTime);
|
|
continue;
|
|
}
|
|
|
|
while(avail-done >= pDevice->UpdateSize)
|
|
{
|
|
aluMixData(pDevice, data->buffer, pDevice->UpdateSize);
|
|
done += pDevice->UpdateSize;
|
|
|
|
if(uSB.b[0] != 1)
|
|
{
|
|
ALuint bytesize = BytesFromDevFmt(pDevice->FmtType);
|
|
ALubyte *bytes = data->buffer;
|
|
ALuint i;
|
|
|
|
if(bytesize == 1)
|
|
{
|
|
for(i = 0;i < data->size;i++)
|
|
fputc(bytes[i], data->f);
|
|
}
|
|
else if(bytesize == 2)
|
|
{
|
|
for(i = 0;i < data->size;i++)
|
|
fputc(bytes[i^1], data->f);
|
|
}
|
|
else if(bytesize == 4)
|
|
{
|
|
for(i = 0;i < data->size;i++)
|
|
fputc(bytes[i^3], data->f);
|
|
}
|
|
}
|
|
else
|
|
fs = fwrite(data->buffer, frameSize, pDevice->UpdateSize,
|
|
data->f);
|
|
if(ferror(data->f))
|
|
{
|
|
ERROR("Error writing to file\n");
|
|
aluHandleDisconnect(pDevice);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ALCboolean wave_open_playback(ALCdevice *device, const ALCchar *deviceName)
|
|
{
|
|
wave_data *data;
|
|
const char *fname;
|
|
|
|
fname = GetConfigValue("wave", "file", "");
|
|
if(!fname[0])
|
|
return ALC_FALSE;
|
|
|
|
if(!deviceName)
|
|
deviceName = waveDevice;
|
|
else if(strcmp(deviceName, waveDevice) != 0)
|
|
return ALC_FALSE;
|
|
|
|
data = (wave_data*)calloc(1, sizeof(wave_data));
|
|
|
|
data->f = fopen(fname, "wb");
|
|
if(!data->f)
|
|
{
|
|
free(data);
|
|
ERROR("Could not open file '%s': %s\n", fname, strerror(errno));
|
|
return ALC_FALSE;
|
|
}
|
|
|
|
device->szDeviceName = strdup(deviceName);
|
|
device->ExtraData = data;
|
|
return ALC_TRUE;
|
|
}
|
|
|
|
static void wave_close_playback(ALCdevice *device)
|
|
{
|
|
wave_data *data = (wave_data*)device->ExtraData;
|
|
|
|
fclose(data->f);
|
|
free(data);
|
|
device->ExtraData = NULL;
|
|
}
|
|
|
|
static ALCboolean wave_reset_playback(ALCdevice *device)
|
|
{
|
|
wave_data *data = (wave_data*)device->ExtraData;
|
|
ALuint channels=0, bits=0;
|
|
size_t val;
|
|
|
|
fseek(data->f, 0, SEEK_SET);
|
|
clearerr(data->f);
|
|
|
|
switch(device->FmtType)
|
|
{
|
|
case DevFmtByte:
|
|
device->FmtType = DevFmtUByte;
|
|
break;
|
|
case DevFmtUShort:
|
|
device->FmtType = DevFmtShort;
|
|
break;
|
|
case DevFmtUByte:
|
|
case DevFmtShort:
|
|
case DevFmtFloat:
|
|
break;
|
|
}
|
|
bits = BytesFromDevFmt(device->FmtType) * 8;
|
|
channels = ChannelsFromDevFmt(device->FmtChans);
|
|
|
|
fprintf(data->f, "RIFF");
|
|
fwrite32le(0xFFFFFFFF, data->f); // 'RIFF' header len; filled in at close
|
|
|
|
fprintf(data->f, "WAVE");
|
|
|
|
fprintf(data->f, "fmt ");
|
|
fwrite32le(40, data->f); // 'fmt ' header len; 40 bytes for EXTENSIBLE
|
|
|
|
// 16-bit val, format type id (extensible: 0xFFFE)
|
|
fwrite16le(0xFFFE, data->f);
|
|
// 16-bit val, channel count
|
|
fwrite16le(channels, data->f);
|
|
// 32-bit val, frequency
|
|
fwrite32le(device->Frequency, data->f);
|
|
// 32-bit val, bytes per second
|
|
fwrite32le(device->Frequency * channels * bits / 8, data->f);
|
|
// 16-bit val, frame size
|
|
fwrite16le(channels * bits / 8, data->f);
|
|
// 16-bit val, bits per sample
|
|
fwrite16le(bits, data->f);
|
|
// 16-bit val, extra byte count
|
|
fwrite16le(22, data->f);
|
|
// 16-bit val, valid bits per sample
|
|
fwrite16le(bits, data->f);
|
|
// 32-bit val, channel mask
|
|
fwrite32le(channel_masks[channels], data->f);
|
|
// 16 byte GUID, sub-type format
|
|
val = fwrite(((bits==32) ? SUBTYPE_FLOAT : SUBTYPE_PCM), 1, 16, data->f);
|
|
|
|
fprintf(data->f, "data");
|
|
fwrite32le(0xFFFFFFFF, data->f); // 'data' header len; filled in at close
|
|
|
|
if(ferror(data->f))
|
|
{
|
|
ERROR("Error writing header: %s\n", strerror(errno));
|
|
return ALC_FALSE;
|
|
}
|
|
|
|
data->DataStart = ftell(data->f);
|
|
|
|
data->size = device->UpdateSize * channels * bits / 8;
|
|
data->buffer = malloc(data->size);
|
|
if(!data->buffer)
|
|
{
|
|
ERROR("Buffer malloc failed\n");
|
|
return ALC_FALSE;
|
|
}
|
|
|
|
SetDefaultWFXChannelOrder(device);
|
|
|
|
data->thread = StartThread(WaveProc, device);
|
|
if(data->thread == NULL)
|
|
{
|
|
free(data->buffer);
|
|
data->buffer = NULL;
|
|
return ALC_FALSE;
|
|
}
|
|
|
|
return ALC_TRUE;
|
|
}
|
|
|
|
static void wave_stop_playback(ALCdevice *device)
|
|
{
|
|
wave_data *data = (wave_data*)device->ExtraData;
|
|
ALuint dataLen;
|
|
long size;
|
|
|
|
if(!data->thread)
|
|
return;
|
|
|
|
data->killNow = 1;
|
|
StopThread(data->thread);
|
|
data->thread = NULL;
|
|
|
|
data->killNow = 0;
|
|
|
|
free(data->buffer);
|
|
data->buffer = NULL;
|
|
|
|
size = ftell(data->f);
|
|
if(size > 0)
|
|
{
|
|
dataLen = size - data->DataStart;
|
|
if(fseek(data->f, data->DataStart-4, SEEK_SET) == 0)
|
|
fwrite32le(dataLen, data->f); // 'data' header len
|
|
if(fseek(data->f, 4, SEEK_SET) == 0)
|
|
fwrite32le(size-8, data->f); // 'WAVE' header len
|
|
}
|
|
}
|
|
|
|
|
|
static ALCboolean wave_open_capture(ALCdevice *pDevice, const ALCchar *deviceName)
|
|
{
|
|
(void)pDevice;
|
|
(void)deviceName;
|
|
return ALC_FALSE;
|
|
}
|
|
|
|
|
|
static const BackendFuncs wave_funcs = {
|
|
wave_open_playback,
|
|
wave_close_playback,
|
|
wave_reset_playback,
|
|
wave_stop_playback,
|
|
wave_open_capture,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
void alc_wave_init(BackendFuncs *func_list)
|
|
{
|
|
*func_list = wave_funcs;
|
|
}
|
|
|
|
void alc_wave_deinit(void)
|
|
{
|
|
}
|
|
|
|
void alc_wave_probe(enum DevProbe type)
|
|
{
|
|
if(!ConfigValueExists("wave", "file"))
|
|
return;
|
|
|
|
switch(type)
|
|
{
|
|
case DEVICE_PROBE:
|
|
AppendDeviceList(waveDevice);
|
|
break;
|
|
case ALL_DEVICE_PROBE:
|
|
AppendAllDeviceList(waveDevice);
|
|
break;
|
|
case CAPTURE_DEVICE_PROBE:
|
|
break;
|
|
}
|
|
}
|