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-rw-r--r--Alc/backends/wave.c355
1 files changed, 355 insertions, 0 deletions
diff --git a/Alc/backends/wave.c b/Alc/backends/wave.c
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--- /dev/null
+++ b/Alc/backends/wave.c
@@ -0,0 +1,355 @@
+/**
+ * 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))
+ {
+ ERR("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);
+ ERR("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))
+ {
+ ERR("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)
+ {
+ ERR("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 const BackendFuncs wave_funcs = {
+ wave_open_playback,
+ wave_close_playback,
+ wave_reset_playback,
+ wave_stop_playback,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL
+};
+
+ALCboolean alc_wave_init(BackendFuncs *func_list)
+{
+ *func_list = wave_funcs;
+ return ALC_TRUE;
+}
+
+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;
+ }
+}
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