Move backend sources to a separate sub-directory

1 files changed, 355 insertions, 0 deletions

diff --git a/Alc/backends/wave.c b/Alc/backends/wave.c
new file mode 100644
index 00000000..465087ce
--- /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;
+    }
+}