/*
 * Copyright (C) 2019 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.
 */
#include <aaudio/AAudio.h>
#include <aaudio/AAudioTesting.h>
#include <android/media/audio/common/AudioDevice.h>
#include <android/media/audio/common/AudioMMapPolicyInfo.h>
#include <android/media/audio/common/AudioMMapPolicyType.h>
#include <media/AidlConversionCppNdk.h>
#include <media/AudioSystem.h>
#include <system/audio-hal-enums.h>
#include <utility/AAudioUtilities.h>

#include "AudioGlobal.h"

/******************************************
 * Static globals.
 */
namespace aaudio {

using android::media::audio::common::AudioDevice;
using android::media::audio::common::AudioMMapPolicyInfo;
using android::media::audio::common::AudioMMapPolicyType;

static aaudio_policy_t g_MMapPolicy = AAUDIO_UNSPECIFIED;

aaudio_policy_t AudioGlobal_getMMapPolicy() {
    return g_MMapPolicy;
}

aaudio_result_t AudioGlobal_setMMapPolicy(aaudio_policy_t policy) {
    aaudio_result_t result = AAUDIO_OK;
    switch (policy) {
        case AAUDIO_UNSPECIFIED:
        case AAUDIO_POLICY_NEVER:
        case AAUDIO_POLICY_AUTO:
        case AAUDIO_POLICY_ALWAYS:
            g_MMapPolicy = policy;
            break;
        default:
            result = AAUDIO_ERROR_ILLEGAL_ARGUMENT;
            break;
    }
    return result;
}

#define AAUDIO_CASE_ENUM(name) case name: return #name

const char* AudioGlobal_convertResultToText(aaudio_result_t returnCode) {
    switch (returnCode) {
        AAUDIO_CASE_ENUM(AAUDIO_OK);
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_DISCONNECTED);
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_ILLEGAL_ARGUMENT);
            // reserved
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_INTERNAL);
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_INVALID_STATE);
            // reserved
            // reserved
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_INVALID_HANDLE);
            // reserved
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_UNIMPLEMENTED);
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_UNAVAILABLE);
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_NO_FREE_HANDLES);
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_NO_MEMORY);
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_NULL);
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_TIMEOUT);
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_WOULD_BLOCK);
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_INVALID_FORMAT);
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_OUT_OF_RANGE);
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_NO_SERVICE);
        AAUDIO_CASE_ENUM(AAUDIO_ERROR_INVALID_RATE);
    }
    return "Unrecognized";
}

const char* AudioGlobal_convertFormatToText(aaudio_format_t format) {
    switch (format) {
        AAUDIO_CASE_ENUM(AAUDIO_FORMAT_UNSPECIFIED);
        AAUDIO_CASE_ENUM(AAUDIO_FORMAT_INVALID);
        AAUDIO_CASE_ENUM(AAUDIO_FORMAT_PCM_I16);
        AAUDIO_CASE_ENUM(AAUDIO_FORMAT_PCM_FLOAT);
        AAUDIO_CASE_ENUM(AAUDIO_FORMAT_PCM_I24_PACKED);
        AAUDIO_CASE_ENUM(AAUDIO_FORMAT_PCM_I32);
        AAUDIO_CASE_ENUM(AAUDIO_FORMAT_IEC61937);
    }
    return "Unrecognized";
}

const char* AudioGlobal_convertDirectionToText(aaudio_direction_t direction) {
    switch (direction) {
        AAUDIO_CASE_ENUM(AAUDIO_DIRECTION_INPUT);
        AAUDIO_CASE_ENUM(AAUDIO_DIRECTION_OUTPUT);
    }
    return "Unrecognized";
}

const char* AudioGlobal_convertPerformanceModeToText(aaudio_performance_mode_t mode) {
    switch (mode) {
        AAUDIO_CASE_ENUM(AAUDIO_PERFORMANCE_MODE_POWER_SAVING);
        AAUDIO_CASE_ENUM(AAUDIO_PERFORMANCE_MODE_NONE);
        AAUDIO_CASE_ENUM(AAUDIO_PERFORMANCE_MODE_LOW_LATENCY);
    }
    return "Unrecognized";
}

const char* AudioGlobal_convertPerformanceModeToShortText(aaudio_performance_mode_t mode) {
    switch (mode) {
        case AAUDIO_PERFORMANCE_MODE_NONE:
            return "NO";
            break;
        case AAUDIO_PERFORMANCE_MODE_POWER_SAVING:
            return "PS";
            break;
        case AAUDIO_PERFORMANCE_MODE_LOW_LATENCY:
            return "LL";
            break;
        case AAUDIO_PERFORMANCE_MODE_POWER_SAVING_OFFLOADED:
            return "OF";
            break;
        default:
            return "??";
            break;
    }
}

const char* AudioGlobal_convertSharingModeToText(aaudio_sharing_mode_t mode) {
    switch (mode) {
        AAUDIO_CASE_ENUM(AAUDIO_SHARING_MODE_SHARED);
        AAUDIO_CASE_ENUM(AAUDIO_SHARING_MODE_EXCLUSIVE);
    }
    return "Unrecognized";
}

const char* AudioGlobal_convertStreamStateToText(aaudio_stream_state_t state) {
    switch (state) {
        AAUDIO_CASE_ENUM(AAUDIO_STREAM_STATE_UNINITIALIZED);
        AAUDIO_CASE_ENUM(AAUDIO_STREAM_STATE_UNKNOWN);
        AAUDIO_CASE_ENUM(AAUDIO_STREAM_STATE_OPEN);
        AAUDIO_CASE_ENUM(AAUDIO_STREAM_STATE_STARTING);
        AAUDIO_CASE_ENUM(AAUDIO_STREAM_STATE_STARTED);
        AAUDIO_CASE_ENUM(AAUDIO_STREAM_STATE_PAUSING);
        AAUDIO_CASE_ENUM(AAUDIO_STREAM_STATE_PAUSED);
        AAUDIO_CASE_ENUM(AAUDIO_STREAM_STATE_FLUSHING);
        AAUDIO_CASE_ENUM(AAUDIO_STREAM_STATE_FLUSHED);
        AAUDIO_CASE_ENUM(AAUDIO_STREAM_STATE_STOPPING);
        AAUDIO_CASE_ENUM(AAUDIO_STREAM_STATE_STOPPED);
        AAUDIO_CASE_ENUM(AAUDIO_STREAM_STATE_CLOSING);
        AAUDIO_CASE_ENUM(AAUDIO_STREAM_STATE_CLOSED);
        AAUDIO_CASE_ENUM(AAUDIO_STREAM_STATE_DISCONNECTED);
    }
    return "Unrecognized";
}

namespace {

aaudio_policy_t getPlatformMMapPolicy(AudioMMapPolicyType policyType, AAudio_DeviceType device,
                                      aaudio_direction_t direction) {
    if (direction != AAUDIO_DIRECTION_INPUT && direction != AAUDIO_DIRECTION_OUTPUT) {
        return AAUDIO_ERROR_ILLEGAL_ARGUMENT;
    }
    const audio_devices_t deviceType = AAudioConvert_aaudioToAndroidDeviceType(device, direction);
    if (deviceType == AUDIO_DEVICE_NONE) {
        return AAUDIO_ERROR_ILLEGAL_ARGUMENT;
    }

    AudioMMapPolicyInfo policyInfo;
    if (android::status_t status = android::AudioSystem::getMmapPolicyForDevice(
            policyType, deviceType, &policyInfo);
        status != android::NO_ERROR) {
        return AAudioConvert_androidToAAudioResult(status);
    }
    return AAudioConvert_androidToAAudioMMapPolicy(policyInfo.mmapPolicy);
}

} // namespace

aaudio_policy_t AudioGlobal_getPlatformMMapPolicy(
        AAudio_DeviceType device, aaudio_direction_t direction) {
    return getPlatformMMapPolicy(AudioMMapPolicyType::DEFAULT, device, direction);
}

aaudio_policy_t AudioGlobal_getPlatformMMapExclusivePolicy(
        AAudio_DeviceType device, aaudio_direction_t direction) {
    return getPlatformMMapPolicy(AudioMMapPolicyType::EXCLUSIVE, device, direction);
}

#undef AAUDIO_CASE_ENUM

}  // namespace aaudio