Move backend sources to a separate sub-directory

1 files changed, 425 insertions, 0 deletions

diff --git a/Alc/backends/opensl.c b/Alc/backends/opensl.c
new file mode 100644
index 00000000..88d05505
--- /dev/null
+++ b/Alc/backends/opensl.c
@@ -0,0 +1,425 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* This is an OpenAL backend for Android using the native audio APIs based on
+ * OpenSL ES 1.0.1. It is based on source code for the native-audio sample app
+ * bundled with NDK.
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include "alMain.h"
+#include "AL/al.h"
+#include "AL/alc.h"
+
+
+#include <SLES/OpenSLES.h>
+#if 1
+#include <SLES/OpenSLES_Android.h>
+#else
+extern SLAPIENTRY const SLInterfaceID SL_IID_ANDROIDSIMPLEBUFFERQUEUE;
+
+struct SLAndroidSimpleBufferQueueItf_;
+typedef const struct SLAndroidSimpleBufferQueueItf_ * const * SLAndroidSimpleBufferQueueItf;
+
+typedef void (*slAndroidSimpleBufferQueueCallback)(SLAndroidSimpleBufferQueueItf caller, void *pContext);
+
+typedef struct SLAndroidSimpleBufferQueueState_ {
+    SLuint32 count;
+    SLuint32 index;
+} SLAndroidSimpleBufferQueueState;
+
+
+struct SLAndroidSimpleBufferQueueItf_ {
+    SLresult (*Enqueue) (
+        SLAndroidSimpleBufferQueueItf self,
+        const void *pBuffer,
+        SLuint32 size
+    );
+    SLresult (*Clear) (
+        SLAndroidSimpleBufferQueueItf self
+    );
+    SLresult (*GetState) (
+        SLAndroidSimpleBufferQueueItf self,
+        SLAndroidSimpleBufferQueueState *pState
+    );
+    SLresult (*RegisterCallback) (
+        SLAndroidSimpleBufferQueueItf self,
+        slAndroidSimpleBufferQueueCallback callback,
+        void* pContext
+    );
+};
+
+#define SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE ((SLuint32) 0x800007BD)
+
+typedef struct SLDataLocator_AndroidSimpleBufferQueue {
+    SLuint32 locatorType;
+    SLuint32 numBuffers;
+} SLDataLocator_AndroidSimpleBufferQueue;
+
+#endif
+
+/* Helper macros */
+#define SLObjectItf_Realize(a,b)        ((*(a))->Realize((a),(b)))
+#define SLObjectItf_GetInterface(a,b,c) ((*(a))->GetInterface((a),(b),(c)))
+#define SLObjectItf_Destroy(a)          ((*(a))->Destroy((a)))
+
+#define SLEngineItf_CreateOutputMix(a,b,c,d,e)       ((*(a))->CreateOutputMix((a),(b),(c),(d),(e)))
+#define SLEngineItf_CreateAudioPlayer(a,b,c,d,e,f,g) ((*(a))->CreateAudioPlayer((a),(b),(c),(d),(e),(f),(g)))
+
+#define SLPlayItf_SetPlayState(a,b) ((*(a))->SetPlayState((a),(b)))
+
+
+typedef struct {
+    /* engine interfaces */
+    SLObjectItf engineObject;
+    SLEngineItf engine;
+
+    /* output mix interfaces */
+    SLObjectItf outputMix;
+
+    /* buffer queue player interfaces */
+    SLObjectItf bufferQueueObject;
+
+    void *buffer;
+    ALuint bufferSize;
+
+    ALuint frameSize;
+} osl_data;
+
+
+static const ALCchar opensl_device[] = "OpenSL";
+
+
+static SLuint32 GetChannelMask(enum DevFmtChannels chans)
+{
+    switch(chans)
+    {
+        case DevFmtMono: return SL_SPEAKER_FRONT_CENTER;
+        case DevFmtStereo: return SL_SPEAKER_FRONT_LEFT|SL_SPEAKER_FRONT_RIGHT;
+        case DevFmtQuad: return SL_SPEAKER_FRONT_LEFT|SL_SPEAKER_FRONT_RIGHT|
+                                SL_SPEAKER_BACK_LEFT|SL_SPEAKER_BACK_RIGHT;
+        case DevFmtX51: return SL_SPEAKER_FRONT_LEFT|SL_SPEAKER_FRONT_RIGHT|
+                               SL_SPEAKER_FRONT_CENTER|SL_SPEAKER_LOW_FREQUENCY|
+                               SL_SPEAKER_BACK_LEFT|SL_SPEAKER_BACK_RIGHT;
+        case DevFmtX61: return SL_SPEAKER_FRONT_LEFT|SL_SPEAKER_FRONT_RIGHT|
+                               SL_SPEAKER_FRONT_CENTER|SL_SPEAKER_LOW_FREQUENCY|
+                               SL_SPEAKER_BACK_CENTER|
+                               SL_SPEAKER_SIDE_LEFT|SL_SPEAKER_SIDE_RIGHT;
+        case DevFmtX71: return SL_SPEAKER_FRONT_LEFT|SL_SPEAKER_FRONT_RIGHT|
+                               SL_SPEAKER_FRONT_CENTER|SL_SPEAKER_LOW_FREQUENCY|
+                               SL_SPEAKER_BACK_LEFT|SL_SPEAKER_BACK_RIGHT|
+                               SL_SPEAKER_SIDE_LEFT|SL_SPEAKER_SIDE_RIGHT;
+        case DevFmtX51Side: return SL_SPEAKER_FRONT_LEFT|SL_SPEAKER_FRONT_RIGHT|
+                                   SL_SPEAKER_FRONT_CENTER|SL_SPEAKER_LOW_FREQUENCY|
+                                   SL_SPEAKER_SIDE_LEFT|SL_SPEAKER_SIDE_RIGHT;
+    }
+    return 0;
+}
+
+static const char *res_str(SLresult result)
+{
+    switch(result)
+    {
+        case SL_RESULT_SUCCESS: return "Success";
+        case SL_RESULT_PRECONDITIONS_VIOLATED: return "Preconditions violated";
+        case SL_RESULT_PARAMETER_INVALID: return "Parameter invalid";
+        case SL_RESULT_MEMORY_FAILURE: return "Memory failure";
+        case SL_RESULT_RESOURCE_ERROR: return "Resource error";
+        case SL_RESULT_RESOURCE_LOST: return "Resource lost";
+        case SL_RESULT_IO_ERROR: return "I/O error";
+        case SL_RESULT_BUFFER_INSUFFICIENT: return "Buffer insufficient";
+        case SL_RESULT_CONTENT_CORRUPTED: return "Content corrupted";
+        case SL_RESULT_CONTENT_UNSUPPORTED: return "Content unsupported";
+        case SL_RESULT_CONTENT_NOT_FOUND: return "Content not found";
+        case SL_RESULT_PERMISSION_DENIED: return "Permission denied";
+        case SL_RESULT_FEATURE_UNSUPPORTED: return "Feature unsupported";
+        case SL_RESULT_INTERNAL_ERROR: return "Internal error";
+        case SL_RESULT_UNKNOWN_ERROR: return "Unknown error";
+        case SL_RESULT_OPERATION_ABORTED: return "Operation aborted";
+        case SL_RESULT_CONTROL_LOST: return "Control lost";
+        case SL_RESULT_READONLY: return "ReadOnly";
+        case SL_RESULT_ENGINEOPTION_UNSUPPORTED: return "Engine option unsupported";
+        case SL_RESULT_SOURCE_SINK_INCOMPATIBLE: return "Source/Sink incompatible";
+    }
+    return "Unknown error code";
+}
+
+#define PRINTERR(x, s) do {                                                      \
+    if((x) != SL_RESULT_SUCCESS)                                                 \
+        ERR("%s: %s\n", (s), res_str((x)));                                      \
+} while(0)
+
+/* this callback handler is called every time a buffer finishes playing */
+static void opensl_callback(SLAndroidSimpleBufferQueueItf bq, void *context)
+{
+    ALCdevice *Device = context;
+    osl_data *data = Device->ExtraData;
+    SLresult result;
+
+    aluMixData(Device, data->buffer, data->bufferSize/data->frameSize);
+
+    result = (*bq)->Enqueue(bq, data->buffer, data->bufferSize);
+    PRINTERR(result, "bq->Enqueue");
+}
+
+
+static ALCboolean opensl_open_playback(ALCdevice *Device, const ALCchar *deviceName)
+{
+    osl_data *data = NULL;
+    SLresult result;
+
+    if(!deviceName)
+        deviceName = opensl_device;
+    else if(strcmp(deviceName, opensl_device) != 0)
+        return ALC_FALSE;
+
+    data = calloc(1, sizeof(*data));
+    if(!data)
+    {
+        alcSetError(Device, ALC_OUT_OF_MEMORY);
+        return ALC_FALSE;
+    }
+
+    // create engine
+    result = slCreateEngine(&data->engineObject, 0, NULL, 0, NULL, NULL);
+    PRINTERR(result, "slCreateEngine");
+    if(SL_RESULT_SUCCESS == result)
+    {
+        result = SLObjectItf_Realize(data->engineObject, SL_BOOLEAN_FALSE);
+        PRINTERR(result, "engine->Realize");
+    }
+    if(SL_RESULT_SUCCESS == result)
+    {
+        result = SLObjectItf_GetInterface(data->engineObject, SL_IID_ENGINE, &data->engine);
+        PRINTERR(result, "engine->GetInterface");
+    }
+    if(SL_RESULT_SUCCESS == result)
+    {
+        result = SLEngineItf_CreateOutputMix(data->engine, &data->outputMix, 0, NULL, NULL);
+        PRINTERR(result, "engine->CreateOutputMix");
+    }
+    if(SL_RESULT_SUCCESS == result)
+    {
+        result = SLObjectItf_Realize(data->outputMix, SL_BOOLEAN_FALSE);
+        PRINTERR(result, "outputMix->Realize");
+    }
+
+    if(SL_RESULT_SUCCESS != result)
+    {
+        if(data->outputMix != NULL)
+            SLObjectItf_Destroy(data->outputMix);
+        data->outputMix = NULL;
+
+        if(data->engineObject != NULL)
+            SLObjectItf_Destroy(data->engineObject);
+        data->engineObject = NULL;
+        data->engine = NULL;
+
+        free(data);
+        return ALC_FALSE;
+    }
+
+    Device->szDeviceName = strdup(deviceName);
+    Device->ExtraData = data;
+
+    return ALC_TRUE;
+}
+
+
+static void opensl_close_playback(ALCdevice *Device)
+{
+    osl_data *data = Device->ExtraData;
+
+    SLObjectItf_Destroy(data->outputMix);
+    data->outputMix = NULL;
+
+    SLObjectItf_Destroy(data->engineObject);
+    data->engineObject = NULL;
+    data->engine = NULL;
+
+    free(data);
+    Device->ExtraData = NULL;
+}
+
+static ALCboolean opensl_reset_playback(ALCdevice *Device)
+{
+    osl_data *data = Device->ExtraData;
+    SLDataLocator_AndroidSimpleBufferQueue loc_bufq;
+    SLAndroidSimpleBufferQueueItf bufferQueue;
+    SLDataLocator_OutputMix loc_outmix;
+    SLDataFormat_PCM format_pcm;
+    SLDataSource audioSrc;
+    SLDataSink audioSnk;
+    SLPlayItf player;
+    SLInterfaceID id;
+    SLboolean req;
+    SLresult result;
+    ALuint i;
+
+
+    Device->UpdateSize = (ALuint64)Device->UpdateSize * 44100 / Device->Frequency;
+    Device->UpdateSize = Device->UpdateSize * Device->NumUpdates / 2;
+    Device->NumUpdates = 2;
+
+    Device->Frequency = 44100;
+    Device->FmtChans = DevFmtStereo;
+    Device->FmtType = DevFmtShort;
+
+    SetDefaultWFXChannelOrder(Device);
+
+
+    id  = SL_IID_ANDROIDSIMPLEBUFFERQUEUE;
+    req = SL_BOOLEAN_TRUE;
+
+    loc_bufq.locatorType = SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE;
+    loc_bufq.numBuffers = Device->NumUpdates;
+
+    format_pcm.formatType = SL_DATAFORMAT_PCM;
+    format_pcm.numChannels = ChannelsFromDevFmt(Device->FmtChans);
+    format_pcm.samplesPerSec = Device->Frequency * 1000;
+    format_pcm.bitsPerSample = BytesFromDevFmt(Device->FmtType) * 8;
+    format_pcm.containerSize = format_pcm.bitsPerSample;
+    format_pcm.channelMask = GetChannelMask(Device->FmtChans);
+    format_pcm.endianness = SL_BYTEORDER_NATIVE;
+
+    audioSrc.pLocator = &loc_bufq;
+    audioSrc.pFormat = &format_pcm;
+
+    loc_outmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
+    loc_outmix.outputMix = data->outputMix;
+    audioSnk.pLocator = &loc_outmix;
+    audioSnk.pFormat = NULL;
+
+
+    result = SLEngineItf_CreateAudioPlayer(data->engine, &data->bufferQueueObject, &audioSrc, &audioSnk, 1, &id, &req);
+    PRINTERR(result, "engine->CreateAudioPlayer");
+    if(SL_RESULT_SUCCESS == result)
+    {
+        result = SLObjectItf_Realize(data->bufferQueueObject, SL_BOOLEAN_FALSE);
+        PRINTERR(result, "bufferQueue->Realize");
+    }
+    if(SL_RESULT_SUCCESS == result)
+    {
+        result = SLObjectItf_GetInterface(data->bufferQueueObject, SL_IID_BUFFERQUEUE, &bufferQueue);
+        PRINTERR(result, "bufferQueue->GetInterface");
+    }
+    if(SL_RESULT_SUCCESS == result)
+    {
+        result = (*bufferQueue)->RegisterCallback(bufferQueue, opensl_callback, Device);
+        PRINTERR(result, "bufferQueue->RegisterCallback");
+    }
+    if(SL_RESULT_SUCCESS == result)
+    {
+        data->frameSize = FrameSizeFromDevFmt(Device->FmtChans, Device->FmtType);
+        data->bufferSize = Device->UpdateSize * data->frameSize;
+        data->buffer = calloc(1, data->bufferSize);
+        if(!data->buffer)
+        {
+            result = SL_RESULT_MEMORY_FAILURE;
+            PRINTERR(result, "calloc");
+        }
+    }
+    /* enqueue the first buffer to kick off the callbacks */
+    for(i = 0;i < Device->NumUpdates;i++)
+    {
+        if(SL_RESULT_SUCCESS == result)
+        {
+            result = (*bufferQueue)->Enqueue(bufferQueue, data->buffer, data->bufferSize);
+            PRINTERR(result, "bufferQueue->Enqueue");
+        }
+    }
+    if(SL_RESULT_SUCCESS == result)
+    {
+        result = SLObjectItf_GetInterface(data->bufferQueueObject, SL_IID_PLAY, &player);
+        PRINTERR(result, "bufferQueue->GetInterface");
+    }
+    if(SL_RESULT_SUCCESS == result)
+    {
+        result = SLPlayItf_SetPlayState(player, SL_PLAYSTATE_PLAYING);
+        PRINTERR(result, "player->SetPlayState");
+    }
+
+    if(SL_RESULT_SUCCESS != result)
+    {
+        if(data->bufferQueueObject != NULL)
+            SLObjectItf_Destroy(data->bufferQueueObject);
+        data->bufferQueueObject = NULL;
+
+        free(data->buffer);
+        data->buffer = NULL;
+        data->bufferSize = 0;
+
+        return ALC_FALSE;
+    }
+
+    return ALC_TRUE;
+}
+
+
+static void opensl_stop_playback(ALCdevice *Device)
+{
+    osl_data *data = Device->ExtraData;
+
+    if(data->bufferQueueObject != NULL)
+        SLObjectItf_Destroy(data->bufferQueueObject);
+    data->bufferQueueObject = NULL;
+
+    free(data->buffer);
+    data->buffer = NULL;
+    data->bufferSize = 0;
+}
+
+
+static const BackendFuncs opensl_funcs = {
+    opensl_open_playback,
+    opensl_close_playback,
+    opensl_reset_playback,
+    opensl_stop_playback,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL
+};
+
+
+ALCboolean alc_opensl_init(BackendFuncs *func_list)
+{
+    *func_list = opensl_funcs;
+    return ALC_TRUE;
+}
+
+void alc_opensl_deinit(void)
+{
+}
+
+void alc_opensl_probe(enum DevProbe type)
+{
+    switch(type)
+    {
+        case DEVICE_PROBE:
+            AppendDeviceList(opensl_device);
+            break;
+        case ALL_DEVICE_PROBE:
+            AppendAllDeviceList(opensl_device);
+            break;
+        case CAPTURE_DEVICE_PROBE:
+            break;
+    }
+}