425 lines
13 KiB
C
425 lines
13 KiB
C
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* This is an OpenAL backend for Android using the native audio APIs based on
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* OpenSL ES 1.0.1. It is based on source code for the native-audio sample app
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* bundled with NDK.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include "alMain.h"
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#include "alu.h"
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#include <SLES/OpenSLES.h>
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#include <SLES/OpenSLES_Android.h>
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/* Helper macros */
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#define VCALL(obj, func) ((*(obj))->func((obj), EXTRACT_VCALL_ARGS
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#define VCALL0(obj, func) ((*(obj))->func((obj) EXTRACT_VCALL_ARGS
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typedef struct {
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/* engine interfaces */
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SLObjectItf engineObject;
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SLEngineItf engine;
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/* output mix interfaces */
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SLObjectItf outputMix;
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/* buffer queue player interfaces */
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SLObjectItf bufferQueueObject;
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void *buffer;
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ALuint bufferSize;
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ALuint curBuffer;
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ALuint frameSize;
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} osl_data;
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static const ALCchar opensl_device[] = "OpenSL";
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static SLuint32 GetChannelMask(enum DevFmtChannels chans)
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{
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switch(chans)
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{
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case DevFmtMono: return SL_SPEAKER_FRONT_CENTER;
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case DevFmtStereo: return SL_SPEAKER_FRONT_LEFT|SL_SPEAKER_FRONT_RIGHT;
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case DevFmtQuad: return SL_SPEAKER_FRONT_LEFT|SL_SPEAKER_FRONT_RIGHT|
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SL_SPEAKER_BACK_LEFT|SL_SPEAKER_BACK_RIGHT;
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case DevFmtX51: return SL_SPEAKER_FRONT_LEFT|SL_SPEAKER_FRONT_RIGHT|
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SL_SPEAKER_FRONT_CENTER|SL_SPEAKER_LOW_FREQUENCY|
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SL_SPEAKER_BACK_LEFT|SL_SPEAKER_BACK_RIGHT;
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case DevFmtX61: return SL_SPEAKER_FRONT_LEFT|SL_SPEAKER_FRONT_RIGHT|
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SL_SPEAKER_FRONT_CENTER|SL_SPEAKER_LOW_FREQUENCY|
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SL_SPEAKER_BACK_CENTER|
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SL_SPEAKER_SIDE_LEFT|SL_SPEAKER_SIDE_RIGHT;
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case DevFmtX71: return SL_SPEAKER_FRONT_LEFT|SL_SPEAKER_FRONT_RIGHT|
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SL_SPEAKER_FRONT_CENTER|SL_SPEAKER_LOW_FREQUENCY|
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SL_SPEAKER_BACK_LEFT|SL_SPEAKER_BACK_RIGHT|
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SL_SPEAKER_SIDE_LEFT|SL_SPEAKER_SIDE_RIGHT;
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case DevFmtX51Side: return SL_SPEAKER_FRONT_LEFT|SL_SPEAKER_FRONT_RIGHT|
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SL_SPEAKER_FRONT_CENTER|SL_SPEAKER_LOW_FREQUENCY|
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SL_SPEAKER_SIDE_LEFT|SL_SPEAKER_SIDE_RIGHT;
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}
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return 0;
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}
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static const char *res_str(SLresult result)
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{
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switch(result)
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{
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case SL_RESULT_SUCCESS: return "Success";
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case SL_RESULT_PRECONDITIONS_VIOLATED: return "Preconditions violated";
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case SL_RESULT_PARAMETER_INVALID: return "Parameter invalid";
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case SL_RESULT_MEMORY_FAILURE: return "Memory failure";
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case SL_RESULT_RESOURCE_ERROR: return "Resource error";
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case SL_RESULT_RESOURCE_LOST: return "Resource lost";
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case SL_RESULT_IO_ERROR: return "I/O error";
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case SL_RESULT_BUFFER_INSUFFICIENT: return "Buffer insufficient";
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case SL_RESULT_CONTENT_CORRUPTED: return "Content corrupted";
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case SL_RESULT_CONTENT_UNSUPPORTED: return "Content unsupported";
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case SL_RESULT_CONTENT_NOT_FOUND: return "Content not found";
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case SL_RESULT_PERMISSION_DENIED: return "Permission denied";
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case SL_RESULT_FEATURE_UNSUPPORTED: return "Feature unsupported";
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case SL_RESULT_INTERNAL_ERROR: return "Internal error";
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case SL_RESULT_UNKNOWN_ERROR: return "Unknown error";
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case SL_RESULT_OPERATION_ABORTED: return "Operation aborted";
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case SL_RESULT_CONTROL_LOST: return "Control lost";
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#ifdef SL_RESULT_READONLY
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case SL_RESULT_READONLY: return "ReadOnly";
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#endif
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#ifdef SL_RESULT_ENGINEOPTION_UNSUPPORTED
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case SL_RESULT_ENGINEOPTION_UNSUPPORTED: return "Engine option unsupported";
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#endif
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#ifdef SL_RESULT_SOURCE_SINK_INCOMPATIBLE
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case SL_RESULT_SOURCE_SINK_INCOMPATIBLE: return "Source/Sink incompatible";
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#endif
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}
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return "Unknown error code";
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}
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#define PRINTERR(x, s) do { \
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if((x) != SL_RESULT_SUCCESS) \
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ERR("%s: %s\n", (s), res_str((x))); \
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} while(0)
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/* this callback handler is called every time a buffer finishes playing */
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static void opensl_callback(SLAndroidSimpleBufferQueueItf bq, void *context)
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{
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ALCdevice *Device = context;
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osl_data *data = Device->ExtraData;
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ALvoid *buf;
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SLresult result;
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buf = (ALbyte*)data->buffer + data->curBuffer*data->bufferSize;
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aluMixData(Device, buf, data->bufferSize/data->frameSize);
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result = VCALL(bq,Enqueue)(buf, data->bufferSize);
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PRINTERR(result, "bq->Enqueue");
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data->curBuffer = (data->curBuffer+1) % Device->NumUpdates;
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}
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static ALCenum opensl_open_playback(ALCdevice *Device, const ALCchar *deviceName)
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{
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osl_data *data = NULL;
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SLresult result;
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if(!deviceName)
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deviceName = opensl_device;
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else if(strcmp(deviceName, opensl_device) != 0)
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return ALC_INVALID_VALUE;
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data = calloc(1, sizeof(*data));
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if(!data)
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return ALC_OUT_OF_MEMORY;
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// create engine
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result = slCreateEngine(&data->engineObject, 0, NULL, 0, NULL, NULL);
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PRINTERR(result, "slCreateEngine");
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if(SL_RESULT_SUCCESS == result)
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{
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result = VCALL(data->engineObject,Realize)(SL_BOOLEAN_FALSE);
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PRINTERR(result, "engine->Realize");
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}
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if(SL_RESULT_SUCCESS == result)
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{
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result = VCALL(data->engineObject,GetInterface)(SL_IID_ENGINE, &data->engine);
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PRINTERR(result, "engine->GetInterface");
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}
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if(SL_RESULT_SUCCESS == result)
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{
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result = VCALL(data->engine,CreateOutputMix)(&data->outputMix, 0, NULL, NULL);
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PRINTERR(result, "engine->CreateOutputMix");
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}
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if(SL_RESULT_SUCCESS == result)
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{
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result = VCALL(data->outputMix,Realize)(SL_BOOLEAN_FALSE);
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PRINTERR(result, "outputMix->Realize");
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}
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if(SL_RESULT_SUCCESS != result)
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{
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if(data->outputMix != NULL)
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VCALL0(data->outputMix,Destroy)();
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data->outputMix = NULL;
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if(data->engineObject != NULL)
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VCALL0(data->engineObject,Destroy)();
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data->engineObject = NULL;
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data->engine = NULL;
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free(data);
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return ALC_INVALID_VALUE;
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}
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Device->DeviceName = strdup(deviceName);
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Device->ExtraData = data;
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return ALC_NO_ERROR;
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}
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static void opensl_close_playback(ALCdevice *Device)
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{
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osl_data *data = Device->ExtraData;
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if(data->bufferQueueObject != NULL)
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VCALL0(data->bufferQueueObject,Destroy)();
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data->bufferQueueObject = NULL;
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VCALL0(data->outputMix,Destroy)();
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data->outputMix = NULL;
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VCALL0(data->engineObject,Destroy)();
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data->engineObject = NULL;
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data->engine = NULL;
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free(data);
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Device->ExtraData = NULL;
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}
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static ALCboolean opensl_reset_playback(ALCdevice *Device)
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{
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osl_data *data = Device->ExtraData;
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SLDataLocator_AndroidSimpleBufferQueue loc_bufq;
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SLDataLocator_OutputMix loc_outmix;
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SLDataFormat_PCM format_pcm;
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SLDataSource audioSrc;
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SLDataSink audioSnk;
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SLInterfaceID id;
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SLboolean req;
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SLresult result;
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Device->UpdateSize = (ALuint64)Device->UpdateSize * 44100 / Device->Frequency;
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Device->UpdateSize = Device->UpdateSize * Device->NumUpdates / 2;
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Device->NumUpdates = 2;
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Device->Frequency = 44100;
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Device->FmtChans = DevFmtStereo;
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Device->FmtType = DevFmtShort;
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SetDefaultWFXChannelOrder(Device);
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id = SL_IID_ANDROIDSIMPLEBUFFERQUEUE;
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req = SL_BOOLEAN_TRUE;
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loc_bufq.locatorType = SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE;
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loc_bufq.numBuffers = Device->NumUpdates;
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format_pcm.formatType = SL_DATAFORMAT_PCM;
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format_pcm.numChannels = ChannelsFromDevFmt(Device->FmtChans);
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format_pcm.samplesPerSec = Device->Frequency * 1000;
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format_pcm.bitsPerSample = BytesFromDevFmt(Device->FmtType) * 8;
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format_pcm.containerSize = format_pcm.bitsPerSample;
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format_pcm.channelMask = GetChannelMask(Device->FmtChans);
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format_pcm.endianness = IS_LITTLE_ENDIAN ? SL_BYTEORDER_LITTLEENDIAN :
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SL_BYTEORDER_BIGENDIAN;
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audioSrc.pLocator = &loc_bufq;
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audioSrc.pFormat = &format_pcm;
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loc_outmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
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loc_outmix.outputMix = data->outputMix;
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audioSnk.pLocator = &loc_outmix;
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audioSnk.pFormat = NULL;
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if(data->bufferQueueObject != NULL)
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VCALL0(data->bufferQueueObject,Destroy)();
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data->bufferQueueObject = NULL;
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result = VCALL(data->engine,CreateAudioPlayer)(&data->bufferQueueObject, &audioSrc, &audioSnk, 1, &id, &req);
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PRINTERR(result, "engine->CreateAudioPlayer");
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if(SL_RESULT_SUCCESS == result)
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{
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result = VCALL(data->bufferQueueObject,Realize)(SL_BOOLEAN_FALSE);
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PRINTERR(result, "bufferQueue->Realize");
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}
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if(SL_RESULT_SUCCESS != result)
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{
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if(data->bufferQueueObject != NULL)
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VCALL0(data->bufferQueueObject,Destroy)();
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data->bufferQueueObject = NULL;
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return ALC_FALSE;
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}
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return ALC_TRUE;
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}
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static ALCboolean opensl_start_playback(ALCdevice *Device)
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{
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osl_data *data = Device->ExtraData;
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SLAndroidSimpleBufferQueueItf bufferQueue;
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SLPlayItf player;
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SLresult result;
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ALuint i;
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result = VCALL(data->bufferQueueObject,GetInterface)(SL_IID_BUFFERQUEUE, &bufferQueue);
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PRINTERR(result, "bufferQueue->GetInterface");
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if(SL_RESULT_SUCCESS == result)
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{
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result = VCALL(bufferQueue,RegisterCallback)(opensl_callback, Device);
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PRINTERR(result, "bufferQueue->RegisterCallback");
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}
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if(SL_RESULT_SUCCESS == result)
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{
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data->frameSize = FrameSizeFromDevFmt(Device->FmtChans, Device->FmtType);
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data->bufferSize = Device->UpdateSize * data->frameSize;
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data->buffer = calloc(Device->NumUpdates, data->bufferSize);
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if(!data->buffer)
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{
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result = SL_RESULT_MEMORY_FAILURE;
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PRINTERR(result, "calloc");
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}
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}
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/* enqueue the first buffer to kick off the callbacks */
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for(i = 0;i < Device->NumUpdates;i++)
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{
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if(SL_RESULT_SUCCESS == result)
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{
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ALvoid *buf = (ALbyte*)data->buffer + i*data->bufferSize;
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result = VCALL(bufferQueue,Enqueue)(buf, data->bufferSize);
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PRINTERR(result, "bufferQueue->Enqueue");
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}
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}
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data->curBuffer = 0;
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if(SL_RESULT_SUCCESS == result)
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{
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result = VCALL(data->bufferQueueObject,GetInterface)(SL_IID_PLAY, &player);
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PRINTERR(result, "bufferQueue->GetInterface");
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}
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if(SL_RESULT_SUCCESS == result)
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{
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result = VCALL(player,SetPlayState)(SL_PLAYSTATE_PLAYING);
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PRINTERR(result, "player->SetPlayState");
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}
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if(SL_RESULT_SUCCESS != result)
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{
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if(data->bufferQueueObject != NULL)
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VCALL0(data->bufferQueueObject,Destroy)();
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data->bufferQueueObject = NULL;
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free(data->buffer);
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data->buffer = NULL;
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data->bufferSize = 0;
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return ALC_FALSE;
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}
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return ALC_TRUE;
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}
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static void opensl_stop_playback(ALCdevice *Device)
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{
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osl_data *data = Device->ExtraData;
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SLPlayItf player;
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SLAndroidSimpleBufferQueueItf bufferQueue;
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SLresult result;
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result = VCALL(data->bufferQueueObject,GetInterface)(SL_IID_PLAY, &player);
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PRINTERR(result, "bufferQueue->GetInterface");
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if(SL_RESULT_SUCCESS == result)
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{
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result = VCALL(player,SetPlayState)(SL_PLAYSTATE_STOPPED);
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PRINTERR(result, "player->SetPlayState");
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}
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result = VCALL(data->bufferQueueObject,GetInterface)(SL_IID_BUFFERQUEUE, &bufferQueue);
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PRINTERR(result, "bufferQueue->GetInterface");
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if(SL_RESULT_SUCCESS == result)
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{
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result = VCALL0(bufferQueue,Clear)();
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PRINTERR(result, "bufferQueue->Clear");
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}
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free(data->buffer);
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data->buffer = NULL;
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data->bufferSize = 0;
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}
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static const BackendFuncs opensl_funcs = {
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opensl_open_playback,
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opensl_close_playback,
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opensl_reset_playback,
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opensl_start_playback,
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opensl_stop_playback,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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ALCdevice_GetLatencyDefault
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};
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ALCboolean alc_opensl_init(BackendFuncs *func_list)
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{
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*func_list = opensl_funcs;
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return ALC_TRUE;
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}
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void alc_opensl_deinit(void)
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{
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}
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void alc_opensl_probe(enum DevProbe type)
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{
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switch(type)
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{
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case ALL_DEVICE_PROBE:
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AppendAllDevicesList(opensl_device);
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break;
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case CAPTURE_DEVICE_PROBE:
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break;
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}
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}
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