media/libaaudio/src/utility/AAudioUtilities.cpp

/*
 * Copyright 2016 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.
 */

#define LOG_TAG "AAudio"
//#define LOG_NDEBUG 0
#include <utils/Log.h>

#include <cutils/properties.h>
#include <stdint.h>
#include <sys/types.h>
#include <utils/Errors.h>

#include "aaudio/AAudio.h"
#include <aaudio/AAudioTesting.h>
#include <math.h>
#include <system/audio-base.h>
#include <assert.h>

#include "utility/AAudioUtilities.h"

using namespace android;

status_t AAudioConvert_aaudioToAndroidStatus(aaudio_result_t result) {
    // This covers the case for AAUDIO_OK and for positive results.
    if (result >= 0) {
        return result;
    }
    status_t status;
    switch (result) {
    case AAUDIO_ERROR_DISCONNECTED:
    case AAUDIO_ERROR_NO_SERVICE:
        status = DEAD_OBJECT;
        break;
    case AAUDIO_ERROR_INVALID_HANDLE:
        status = BAD_TYPE;
        break;
    case AAUDIO_ERROR_INVALID_STATE:
        status = INVALID_OPERATION;
        break;
    case AAUDIO_ERROR_INVALID_RATE:
    case AAUDIO_ERROR_INVALID_FORMAT:
    case AAUDIO_ERROR_ILLEGAL_ARGUMENT:
    case AAUDIO_ERROR_OUT_OF_RANGE:
        status = BAD_VALUE;
        break;
    case AAUDIO_ERROR_WOULD_BLOCK:
        status = WOULD_BLOCK;
        break;
    case AAUDIO_ERROR_NULL:
        status = UNEXPECTED_NULL;
        break;
    case AAUDIO_ERROR_UNAVAILABLE:
        status = NOT_ENOUGH_DATA;
        break;

    // TODO translate these result codes
    case AAUDIO_ERROR_INTERNAL:
    case AAUDIO_ERROR_UNIMPLEMENTED:
    case AAUDIO_ERROR_NO_FREE_HANDLES:
    case AAUDIO_ERROR_NO_MEMORY:
    case AAUDIO_ERROR_TIMEOUT:
    default:
        status = UNKNOWN_ERROR;
        break;
    }
    return status;
}

aaudio_result_t AAudioConvert_androidToAAudioResult(status_t status) {
    // This covers the case for OK and for positive result.
    if (status >= 0) {
        return status;
    }
    aaudio_result_t result;
    switch (status) {
    case BAD_TYPE:
        result = AAUDIO_ERROR_INVALID_HANDLE;
        break;
    case DEAD_OBJECT:
        result = AAUDIO_ERROR_NO_SERVICE;
        break;
    case INVALID_OPERATION:
        result = AAUDIO_ERROR_INVALID_STATE;
        break;
    case UNEXPECTED_NULL:
        result = AAUDIO_ERROR_NULL;
        break;
    case BAD_VALUE:
        result = AAUDIO_ERROR_ILLEGAL_ARGUMENT;
        break;
    case WOULD_BLOCK:
        result = AAUDIO_ERROR_WOULD_BLOCK;
        break;
    case NOT_ENOUGH_DATA:
        result = AAUDIO_ERROR_UNAVAILABLE;
        break;
    default:
        result = AAUDIO_ERROR_INTERNAL;
        break;
    }
    return result;
}

audio_session_t AAudioConvert_aaudioToAndroidSessionId(aaudio_session_id_t sessionId) {
    // If not a regular sessionId then convert to a safe value of AUDIO_SESSION_ALLOCATE.
    return (sessionId == AAUDIO_SESSION_ID_ALLOCATE || sessionId == AAUDIO_SESSION_ID_NONE)
           ? AUDIO_SESSION_ALLOCATE
           : (audio_session_t) sessionId;
}

audio_format_t AAudioConvert_aaudioToAndroidDataFormat(aaudio_format_t aaudioFormat) {
    audio_format_t androidFormat;
    switch (aaudioFormat) {
    case AAUDIO_FORMAT_UNSPECIFIED:
        androidFormat = AUDIO_FORMAT_DEFAULT;
        break;
    case AAUDIO_FORMAT_PCM_I16:
        androidFormat = AUDIO_FORMAT_PCM_16_BIT;
        break;
    case AAUDIO_FORMAT_PCM_FLOAT:
        androidFormat = AUDIO_FORMAT_PCM_FLOAT;
        break;
    default:
        androidFormat = AUDIO_FORMAT_INVALID;
        ALOGE("%s() 0x%08X unrecognized", __func__, aaudioFormat);
        break;
    }
    return androidFormat;
}

aaudio_format_t AAudioConvert_androidToAAudioDataFormat(audio_format_t androidFormat) {
    aaudio_format_t aaudioFormat;
    switch (androidFormat) {
    case AUDIO_FORMAT_DEFAULT:
        aaudioFormat = AAUDIO_FORMAT_UNSPECIFIED;
        break;
    case AUDIO_FORMAT_PCM_16_BIT:
        aaudioFormat = AAUDIO_FORMAT_PCM_I16;
        break;
    case AUDIO_FORMAT_PCM_FLOAT:
        aaudioFormat = AAUDIO_FORMAT_PCM_FLOAT;
        break;
    default:
        aaudioFormat = AAUDIO_FORMAT_INVALID;
        ALOGE("%s() 0x%08X unrecognized", __func__, androidFormat);
        break;
    }
    return aaudioFormat;
}

// Make a message string from the condition.
#define STATIC_ASSERT(condition) static_assert(condition, #condition)

audio_usage_t AAudioConvert_usageToInternal(aaudio_usage_t usage) {
    // The public aaudio_content_type_t constants are supposed to have the same
    // values as the internal audio_content_type_t values.
    STATIC_ASSERT(AAUDIO_USAGE_MEDIA == AUDIO_USAGE_MEDIA);
    STATIC_ASSERT(AAUDIO_USAGE_VOICE_COMMUNICATION == AUDIO_USAGE_VOICE_COMMUNICATION);
    STATIC_ASSERT(AAUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING
                  == AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING);
    STATIC_ASSERT(AAUDIO_USAGE_ALARM == AUDIO_USAGE_ALARM);
    STATIC_ASSERT(AAUDIO_USAGE_NOTIFICATION == AUDIO_USAGE_NOTIFICATION);
    STATIC_ASSERT(AAUDIO_USAGE_NOTIFICATION_RINGTONE
                  == AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE);
    STATIC_ASSERT(AAUDIO_USAGE_NOTIFICATION_EVENT == AUDIO_USAGE_NOTIFICATION_EVENT);
    STATIC_ASSERT(AAUDIO_USAGE_ASSISTANCE_ACCESSIBILITY == AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY);
    STATIC_ASSERT(AAUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE
                  == AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE);
    STATIC_ASSERT(AAUDIO_USAGE_ASSISTANCE_SONIFICATION == AUDIO_USAGE_ASSISTANCE_SONIFICATION);
    STATIC_ASSERT(AAUDIO_USAGE_GAME == AUDIO_USAGE_GAME);
    STATIC_ASSERT(AAUDIO_USAGE_ASSISTANT == AUDIO_USAGE_ASSISTANT);
    if (usage == AAUDIO_UNSPECIFIED) {
        usage = AAUDIO_USAGE_MEDIA;
    }
    return (audio_usage_t) usage; // same value
}

audio_content_type_t AAudioConvert_contentTypeToInternal(aaudio_content_type_t contentType) {
    // The public aaudio_content_type_t constants are supposed to have the same
    // values as the internal audio_content_type_t values.
    STATIC_ASSERT(AAUDIO_CONTENT_TYPE_MUSIC == AUDIO_CONTENT_TYPE_MUSIC);
    STATIC_ASSERT(AAUDIO_CONTENT_TYPE_SPEECH == AUDIO_CONTENT_TYPE_SPEECH);
    STATIC_ASSERT(AAUDIO_CONTENT_TYPE_SONIFICATION == AUDIO_CONTENT_TYPE_SONIFICATION);
    STATIC_ASSERT(AAUDIO_CONTENT_TYPE_MOVIE == AUDIO_CONTENT_TYPE_MOVIE);
    if (contentType == AAUDIO_UNSPECIFIED) {
        contentType = AAUDIO_CONTENT_TYPE_MUSIC;
    }
    return (audio_content_type_t) contentType; // same value
}

audio_source_t AAudioConvert_inputPresetToAudioSource(aaudio_input_preset_t preset) {
    // The public aaudio_input_preset_t constants are supposed to have the same
    // values as the internal audio_source_t values.
    STATIC_ASSERT(AAUDIO_UNSPECIFIED == AUDIO_SOURCE_DEFAULT);
    STATIC_ASSERT(AAUDIO_INPUT_PRESET_GENERIC == AUDIO_SOURCE_MIC);
    STATIC_ASSERT(AAUDIO_INPUT_PRESET_CAMCORDER == AUDIO_SOURCE_CAMCORDER);
    STATIC_ASSERT(AAUDIO_INPUT_PRESET_VOICE_RECOGNITION == AUDIO_SOURCE_VOICE_RECOGNITION);
    STATIC_ASSERT(AAUDIO_INPUT_PRESET_VOICE_COMMUNICATION == AUDIO_SOURCE_VOICE_COMMUNICATION);
    STATIC_ASSERT(AAUDIO_INPUT_PRESET_UNPROCESSED == AUDIO_SOURCE_UNPROCESSED);
    STATIC_ASSERT(AAUDIO_INPUT_PRESET_VOICE_PERFORMANCE == AUDIO_SOURCE_VOICE_PERFORMANCE);
    if (preset == AAUDIO_UNSPECIFIED) {
        preset = AAUDIO_INPUT_PRESET_VOICE_RECOGNITION;
    }
    return (audio_source_t) preset; // same value
}

int32_t AAudioConvert_framesToBytes(int32_t numFrames,
                                    int32_t bytesPerFrame,
                                    int32_t *sizeInBytes) {
    *sizeInBytes = 0;

    if (numFrames < 0 || bytesPerFrame < 0) {
        ALOGE("negative size, numFrames = %d, frameSize = %d", numFrames, bytesPerFrame);
        return AAUDIO_ERROR_OUT_OF_RANGE;
    }

    // Prevent numeric overflow.
    if (numFrames > (INT32_MAX / bytesPerFrame)) {
        ALOGE("size overflow, numFrames = %d, frameSize = %d", numFrames, bytesPerFrame);
        return AAUDIO_ERROR_OUT_OF_RANGE;
    }

    *sizeInBytes = numFrames * bytesPerFrame;
    return AAUDIO_OK;
}

static int32_t AAudioProperty_getMMapProperty(const char *propName,
                                              int32_t defaultValue,
                                              const char * caller) {
    int32_t prop = property_get_int32(propName, defaultValue);
    switch (prop) {
        case AAUDIO_UNSPECIFIED:
        case AAUDIO_POLICY_NEVER:
        case AAUDIO_POLICY_ALWAYS:
        case AAUDIO_POLICY_AUTO:
            break;
        default:
            ALOGE("%s: invalid = %d", caller, prop);
            prop = defaultValue;
            break;
    }
    return prop;
}

int32_t AAudioProperty_getMMapPolicy() {
    return AAudioProperty_getMMapProperty(AAUDIO_PROP_MMAP_POLICY,
                                          AAUDIO_UNSPECIFIED, __func__);
}

int32_t AAudioProperty_getMMapExclusivePolicy() {
    return AAudioProperty_getMMapProperty(AAUDIO_PROP_MMAP_EXCLUSIVE_POLICY,
                                          AAUDIO_UNSPECIFIED, __func__);
}

int32_t AAudioProperty_getMixerBursts() {
    const int32_t defaultBursts = 2; // arbitrary, use 2 for double buffered
    const int32_t maxBursts = 1024; // arbitrary
    int32_t prop = property_get_int32(AAUDIO_PROP_MIXER_BURSTS, defaultBursts);
    if (prop < 1 || prop > maxBursts) {
        ALOGE("AAudioProperty_getMixerBursts: invalid = %d", prop);
        prop = defaultBursts;
    }
    return prop;
}

int32_t AAudioProperty_getWakeupDelayMicros() {
    const int32_t minMicros = 0; // arbitrary
    const int32_t defaultMicros = 200; // arbitrary, based on some observed jitter
    const int32_t maxMicros = 5000; // arbitrary, probably don't want more than 500
    int32_t prop = property_get_int32(AAUDIO_PROP_WAKEUP_DELAY_USEC, defaultMicros);
    if (prop < minMicros) {
        ALOGW("AAudioProperty_getWakeupDelayMicros: clipped %d to %d", prop, minMicros);
        prop = minMicros;
    } else if (prop > maxMicros) {
        ALOGW("AAudioProperty_getWakeupDelayMicros: clipped %d to %d", prop, maxMicros);
        prop = maxMicros;
    }
    return prop;
}

int32_t AAudioProperty_getMinimumSleepMicros() {
    const int32_t minMicros = 20; // arbitrary
    const int32_t defaultMicros = 200; // arbitrary
    const int32_t maxMicros = 2000; // arbitrary
    int32_t prop = property_get_int32(AAUDIO_PROP_MINIMUM_SLEEP_USEC, defaultMicros);
    if (prop < minMicros) {
        ALOGW("AAudioProperty_getMinimumSleepMicros: clipped %d to %d", prop, minMicros);
        prop = minMicros;
    } else if (prop > maxMicros) {
        ALOGW("AAudioProperty_getMinimumSleepMicros: clipped %d to %d", prop, maxMicros);
        prop = maxMicros;
    }
    return prop;
}

int32_t AAudioProperty_getHardwareBurstMinMicros() {
    const int32_t defaultMicros = 1000; // arbitrary
    const int32_t maxMicros = 1000 * 1000; // arbitrary
    int32_t prop = property_get_int32(AAUDIO_PROP_HW_BURST_MIN_USEC, defaultMicros);
    if (prop < 1 || prop > maxMicros) {
        ALOGE("AAudioProperty_getHardwareBurstMinMicros: invalid = %d, use %d",
              prop, defaultMicros);
        prop = defaultMicros;
    }
    return prop;
}

aaudio_result_t AAudio_isFlushAllowed(aaudio_stream_state_t state) {
    aaudio_result_t result = AAUDIO_OK;
    switch (state) {
// Proceed with flushing.
        case AAUDIO_STREAM_STATE_OPEN:
        case AAUDIO_STREAM_STATE_PAUSED:
        case AAUDIO_STREAM_STATE_STOPPED:
        case AAUDIO_STREAM_STATE_FLUSHED:
            break;

// Transition from one inactive state to another.
        case AAUDIO_STREAM_STATE_STARTING:
        case AAUDIO_STREAM_STATE_STARTED:
        case AAUDIO_STREAM_STATE_STOPPING:
        case AAUDIO_STREAM_STATE_PAUSING:
        case AAUDIO_STREAM_STATE_FLUSHING:
        case AAUDIO_STREAM_STATE_CLOSING:
        case AAUDIO_STREAM_STATE_CLOSED:
        case AAUDIO_STREAM_STATE_DISCONNECTED:
        default:
            ALOGE("can only flush stream when PAUSED, OPEN or STOPPED, state = %s",
                  AAudio_convertStreamStateToText(state));
            result =  AAUDIO_ERROR_INVALID_STATE;
            break;
    }
    return result;
}