/*
 *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include <stdio.h>
#include <string.h>
#include <time.h>
#include <cassert>
#if defined(_WIN32)
 #include <conio.h>
#endif

#include "voe_unit_test.h"

#include "../../source/voice_engine_defines.h"
#include "thread_wrapper.h"

using namespace webrtc;

namespace voetest {

#ifdef MAC_IPHONE
extern char micFile[256];
#else
extern const char* micFile;
#endif

#define CHECK(expr)                                             \
    if (expr)                                                   \
    {                                                           \
        printf("Error at line: %i, %s \n", __LINE__, #expr);    \
        printf("Error code: %i \n", base->LastError());  \
		PAUSE												    \
        return -1;                                              \
    }

extern char* GetFilename(char* filename);
extern const char* GetFilename(const char* filename);
extern int GetResource(char* resource, char* dest, int destLen);
extern char* GetResource(char* resource);
extern const char* GetResource(const char* resource);

const char* VoEUnitTest::_key = "====YUtFWRAAAAADBtIHgAAAAAEAAAAcAAAAAQBHU0dsb2"
    "JhbCBJUCBTb3VuZAAC\nAAAAIwAAAExpY2Vuc2VkIHRvIE5vcnRlbCBOZXR3cm9rcwAAAAAxA"
    "AAAZxZ7/u0M\niFYyTwSwko5Uutf7mh8S0O4rYZYTFidbzQeuGonuL17F/2oD/2pfDp3jL4Rf"
    "3z/A\nnlJsEJgEtASkDNFuwLILjGY0pzjjAYQp3pCl6z6k2MtE06AirdjGLYCjENpq/opX\nO"
    "rs3sIuwdYK5va/aFcsjBDmlsGCUM48RDYG9s23bIHYafXUC4ofOaubbZPWiPTmL\nEVJ8WH4F"
    "9pgNjALc14oJXfON7r/3\n=EsLx";

// ----------------------------------------------------------------------------
//                       >>>  R E A D M E  F I R S T <<<
// ----------------------------------------------------------------------------

// 1) The user must ensure that the following codecs are included in VoE:
//
// - L16
// - G.729
// - G.722.1C

// 2) It is also possible to modify the simulation time for each indivifual test
//
const int dTBetweenEachTest = 4000;

// ----------------------------------------------------------------------------
//                                  Encrypt
// ----------------------------------------------------------------------------

void VoEUnitTest::encrypt(int channel_no,
                          unsigned char * in_data,
                          unsigned char * out_data,
                          int bytes_in,
                          int * bytes_out)
{
    int i;

    if (!_extOnOff)
    {
        // no stereo emulation <=> pure bypass
        for (i = 0; i < bytes_in; i++)
            out_data[i] = in_data[i];
        *bytes_out = bytes_in;
    }
    else if (_extOnOff && (_extBitsPerSample == 16))
    {
        // stereo emulation (sample based, 2 bytes per sample)

        const int nBytesPayload = bytes_in-12;

        // RTP header (first 12 bytes)
        memcpy(out_data, in_data, 12);

        // skip RTP header
        short* ptrIn = (short*) &in_data[12];
        short* ptrOut = (short*) &out_data[12];

        // network byte order
        for (i = 0; i < nBytesPayload/2; i++)
        {
            // produce two output samples for each input sample
            *ptrOut++ = *ptrIn; // left sample
            *ptrOut++ = *ptrIn; // right sample
            ptrIn++;
        }

        *bytes_out = 12 + 2*nBytesPayload;
    }
    else if (_extOnOff && (_extBitsPerSample == 8))
    {
        // stereo emulation (sample based, 1 bytes per sample)

        const int nBytesPayload = bytes_in-12;

        // RTP header (first 12 bytes)
        memcpy(out_data, in_data, 12);

        // skip RTP header
        unsigned char* ptrIn = (unsigned char*) &in_data[12];
        unsigned char* ptrOut = (unsigned char*) &out_data[12];

        // network byte order
        for (i = 0; i < nBytesPayload; i++)
        {
            // produce two output samples for each input sample
            *ptrOut++ = *ptrIn; // left sample
            *ptrOut++ = *ptrIn; // right sample
            ptrIn++;
        }

        *bytes_out = 12 + 2*nBytesPayload;
    }
    else if (_extOnOff && (_extBitsPerSample == -1))
    {
        // stereo emulation (frame based)

        const int nBytesPayload = bytes_in-12;

        // RTP header (first 12 bytes)
        memcpy(out_data, in_data, 12);

        // skip RTP header
        unsigned char* ptrIn = (unsigned char*) &in_data[12];
        unsigned char* ptrOut = (unsigned char*) &out_data[12];

        // left channel
        for (i = 0; i < nBytesPayload; i++)
        {
            *ptrOut++ = *ptrIn++;
        }

        ptrIn = (unsigned char*) &in_data[12];

        // right channel
        for (i = 0; i < nBytesPayload; i++)
        {
            *ptrOut++ = *ptrIn++;
        }

        *bytes_out = 12 + 2*nBytesPayload;
    }
}

void VoEUnitTest::decrypt(int channel_no,
                          unsigned char * in_data,
                          unsigned char * out_data,
                          int bytes_in,
                          int * bytes_out)
{
    int i;
    for (i = 0; i < bytes_in; i++)
        out_data[i] = in_data[i];
    *bytes_out = bytes_in;
}
    
void VoEUnitTest::encrypt_rtcp(int channel_no,
                               unsigned char * in_data,
                               unsigned char * out_data,
                               int bytes_in,
                               int * bytes_out)
{
    int i;
    for (i = 0; i < bytes_in; i++)
        out_data[i] = in_data[i];
    *bytes_out = bytes_in;
}

void VoEUnitTest::decrypt_rtcp(int channel_no,
                               unsigned char * in_data,
                               unsigned char * out_data,
                               int bytes_in,
                               int * bytes_out)
{
    int i;
    for (i = 0; i < bytes_in; i++)
        out_data[i] = in_data[i];
    *bytes_out = bytes_in;
}

void VoEUnitTest::SetStereoExternalEncryption(int channel,
                                              bool onOff,
                                              int bitsPerSample)
{
    _extOnOff = onOff;
    _extChannel = channel;
    _extBitsPerSample = bitsPerSample;
}

// VoEVEMediaProcess
MyMedia mpobj;

// ----------------------------------------------------------------------------
//                               VoEUnitTest
// ----------------------------------------------------------------------------

VoEUnitTest::VoEUnitTest(VoETestManager& mgr) :
    _mgr(mgr),
    _extOnOff(false),
    _extBitsPerSample(-1)
{
    for (int i = 0; i < 32; i++)
    {
        _listening[i] = false;
        _playing[i] = false;
        _sending[i] = false;
    }
}

// ----------------------------------------------------------------------------
//  DoTest
// ----------------------------------------------------------------------------

int VoEUnitTest::DoTest()
{
    int test(-1);
    int ret(0);
    while ((test != 0) && (ret != -1))
    {
        test = MenuSelection();
        switch (test)
        {
            case 0:
                // Quit stress test
                break;
            case 1:
                ret = MixerTest();
                break;
            case 2:
                ret = MixerTest();
                break;
            default:
                // Should not be possible
                printf("Invalid selection! (Test code error)\n");
                assert(false);
        } // switch
    } // while

    return ret;
}

// ----------------------------------------------------------------------------
//  MenuSelection
// ----------------------------------------------------------------------------

int VoEUnitTest::MenuSelection()
{
    printf("------------------------------------------------\n");
    printf("Select unit test\n\n");
    printf(" (0)  Quit\n");
    printf(" (1)  All\n");
    printf("- - - - - - - - - - - - - - - - - - - - - - - - \n");
    printf(" (2)  Mixer\n");

    const int maxMenuSelection = 2;
    int selection(-1);
    int dummy(0);

    while ((selection < 0) || (selection > maxMenuSelection))
    {
        printf("\n: ");
        dummy = scanf("%d", &selection);
        if ((selection < 0) || (selection > maxMenuSelection))
        {
            printf("Invalid selection!\n");
        }
    }

    return selection;
}

// ----------------------------------------------------------------------------
//  StartMedia
// ----------------------------------------------------------------------------

int VoEUnitTest::StartMedia(int channel, 
                            int rtpPort,
                            bool listen,
                            bool playout,
                            bool send,
                            bool fileAsMic,
                            bool localFile)
{
    VoEBase* base = _mgr.BasePtr();
    VoEFile* file = _mgr.FilePtr();
    VoECodec* codec = _mgr.CodecPtr();

    _listening[channel] = false;
    _playing[channel] = false;
    _sending[channel] = false;

    CHECK(base->SetLocalReceiver(channel, rtpPort));
    CHECK(base->SetSendDestination(channel, rtpPort, "127.0.0.1"));
    if (listen)
    {
        _listening[channel] = true;
        CHECK(base->StartReceive(channel));
    }
    if (playout)
    {
        _playing[channel] = true;
        CHECK(base->StartPlayout(channel));
    }
    if (send)
    {
        _sending[channel] = true;
        CHECK(base->StartSend(channel));
    }
    if (fileAsMic)
    {
        // play mic as file, mix with microphone to ensure that SWB can be
        //tested as well
        const bool mixWithMic(true);
        CHECK(file->StartPlayingFileAsMicrophone(channel, micFile,
                                                 true, mixWithMic));
    }
    if (localFile)
    {
        CHECK(file->StartPlayingFileLocally(channel,
                                            GetResource("audio_short16.pcm"),
                                            false,
                                            kFileFormatPcm16kHzFile));
    }

    return 0;
}

// ----------------------------------------------------------------------------
//  StopMedia
// ----------------------------------------------------------------------------

int VoEUnitTest::StopMedia(int channel)
{
    VoEBase* base = _mgr.BasePtr();
    VoEFile* file = _mgr.FilePtr();

    if (file->IsPlayingFileAsMicrophone(channel))
    {
        CHECK(file->StopPlayingFileAsMicrophone(channel));
    }
    if (file->IsPlayingFileLocally(channel))
    {
        CHECK(file->StopPlayingFileLocally(channel));
    }
    if (_listening[channel])
    {
        _listening[channel] = false;
        CHECK(base->StopReceive(channel));
    }
    if (_playing[channel])
    {
        _playing[channel] = false;
        CHECK(base->StopPlayout(channel));
    }
    if (_sending[channel])
    {
        _sending[channel] = false;
        CHECK(base->StopSend(channel));
    }

    return 0;
}

void VoEUnitTest::Sleep(unsigned int timeMillisec, bool addMarker)
{
    if (addMarker)
    {
        float dtSec = (float) ((float) timeMillisec / 1000.0);
        printf("[dT=%.1f]", dtSec);
        fflush(NULL);
    }
    ::Sleep(timeMillisec);
}

void VoEUnitTest::Wait()
{
#if defined(_WIN32)
    printf("\npress any key..."); fflush(NULL);
    _getch();
#endif
}

void VoEUnitTest::Test(const char* msg)
{
    printf(msg); fflush(NULL);
    printf("\n"); fflush(NULL);
}

int VoEUnitTest::MixerTest()
{
    // Set up test parameters first
    //
    const int testTime(dTBetweenEachTest);

    printf("\n\n================================================\n");
    printf(" Mixer Unit Test\n");
    printf("================================================\n\n");

    // Get sub-API pointers
    //
    VoEBase* base = _mgr.BasePtr();
    VoECodec* codec = _mgr.CodecPtr();
    VoEFile* file = _mgr.FilePtr();
    VoEVolumeControl* volume = _mgr.VolumeControlPtr();
    VoEEncryption* encrypt = _mgr.EncryptionPtr();
    VoEDtmf* dtmf = _mgr.DtmfPtr();
    VoEExternalMedia* xmedia = _mgr.ExternalMediaPtr();

    // Set trace
    //
    VoiceEngine::SetTraceFile(GetFilename("UnitTest_Mixer_trace.txt"));
    VoiceEngine::SetTraceFilter(kTraceStateInfo |
                                kTraceWarning |
                                kTraceError |
                                kTraceCritical |
                                kTraceApiCall |
                                kTraceMemory |
                                kTraceInfo);

    // Init
    //
    CHECK(base->Init());

    // 8 kHz
    CodecInst l16_8 = { 123, "L16", 8000, 160, 1, 128000 };
    CodecInst pcmu_8 = { 0, "pcmu", 8000, 160, 1, 64000 };
    CodecInst g729_8 = { 18, "g729", 8000, 160, 1, 8000 };

    // 16 kHz
    CodecInst ipcmwb_16 = { 97, "ipcmwb", 16000, 320, 1, 80000 };
    CodecInst l16_16 = { 124, "L16", 16000, 320, 1, 256000 };

    // 32 kHz
    CodecInst l16_32 = { 125, "L16", 32000, 320, 1, 512000 };
    CodecInst g722_1c_32 = { 126, "G7221", 32000, 640, 1, 32000 };// 20ms@32kHz

    // ------------------------
    // Verify mixing frequency
    // ------------------------

    base->CreateChannel();

    Test(">> Verify correct mixing frequency:\n");

    Test("(ch 0) Sending file at 8kHz <=> mixing at 8kHz...");
    CHECK(StartMedia(0, 12345, true, true, true, true, false));
    Sleep(testTime);

    Test("(ch 0) Sending file at 16kHz <=> mixing at 16kHz...");
    CHECK(codec->SetSendCodec(0, ipcmwb_16));
    Sleep(testTime);

    Test("(ch 0) Sending speech at 32kHz <=> mixing at 32Hz...");
    CHECK(codec->SetSendCodec(0, l16_32));
    Sleep(testTime);

    Test("(ch 0) Sending file at 8kHz <=> mixing at 8kHz...");
    CHECK(codec->SetSendCodec(0, pcmu_8));
    Sleep(testTime);

    Test("(ch 0) Playing 16kHz file locally <=> mixing at 16kHz...");
    CHECK(file->StartPlayingFileLocally(0, GetResource("audio_long16.pcm"),
                                        false, kFileFormatPcm16kHzFile));
    Sleep(testTime);
    CHECK(file->StopPlayingFileLocally(0));

    base->CreateChannel();

    Test("(ch 0) Sending file at 8kHz <=> mixing at 8kHz...");
    CHECK(codec->SetSendCodec(0, pcmu_8));
    Sleep(testTime);

    Test("(ch 0) Sending speech at 32kHz <=> mixing at 32Hz...");
    CHECK(codec->SetSendCodec(0, l16_32));
    Sleep(testTime);

    Test("(ch 1) Playing 16kHz file locally <=> mixing at 32kHz...");
    CHECK(StartMedia(1, 54321, false, true, false, false, true));
    Sleep(testTime);

    CHECK(StopMedia(1));
    CHECK(StopMedia(0));

    base->DeleteChannel(1);
    base->DeleteChannel(0);
    ANL();

    // -------------------------
    // Verify stereo mode mixing
    // -------------------------

    base->CreateChannel();
    base->CreateChannel();

    // SetOutputVolumePan
    //
    // Ensure that all cases sound OK and that the mixer changes state between
    // mono and stereo as it should. A debugger is required to trace the state
    // transitions.

    Test(">> Verify correct mixing in stereo using SetOutputVolumePan():\n");

    Test("(ch 0) Playing 16kHz file locally <=> mixing in mono @ 16kHz...");
    CHECK(StartMedia(0, 12345, false, true, false, false, true));
    Sleep(testTime);
    Test("Panning volume to the left <=> mixing in stereo @ 16kHz...");
    CHECK(volume->SetOutputVolumePan(-1, 1.0, 0.0));
    Sleep(testTime);
    Test("Panning volume to the right <=> mixing in stereo @ 16kHz...");
    CHECK(volume->SetOutputVolumePan(-1, 0.0, 1.0));
    Sleep(testTime);
    Test("Back to center volume again <=> mixing in mono @ 16kHz...");
    CHECK(volume->SetOutputVolumePan(-1, 1.0, 1.0));
    Sleep(testTime);
    Test("(ch 1) Playing 16kHz file locally <=> mixing in mono @ 16kHz...");
    CHECK(StartMedia(1, 54321, false, true, false, false, true));
    Sleep(testTime);
    Test("Panning volume to the left <=> mixing in stereo @ 16kHz...");
    CHECK(volume->SetOutputVolumePan(-1, 1.0, 0.0));
    Sleep(testTime);
    Test("Back to center volume again <=> mixing in mono @ 16kHz...");
    CHECK(volume->SetOutputVolumePan(-1, 1.0, 1.0));
    Sleep(testTime);
    Test("(ch 1) Stopped playing file <=> mixing in mono @ 16kHz...");
    CHECK(StopMedia(1));
    Sleep(testTime);
    CHECK(StopMedia(0));
    Test("(ch 0) Sending file at 8kHz <=> mixing at 8kHz...");
    CHECK(StartMedia(0, 12345, true, true, true, true, false));
    Sleep(testTime);
    Test("(ch 0) Sending speech at 32kHz <=> mixing at 32kHz...");
    CHECK(codec->SetSendCodec(0, l16_32));
    Sleep(testTime);
    Test("Panning volume to the right <=> mixing in stereo @ 32kHz...");
    CHECK(volume->SetOutputVolumePan(-1, 0.0, 1.0));
    Sleep(testTime);
    Test("Back to center volume again <=> mixing in mono @ 32kHz...");
    CHECK(volume->SetOutputVolumePan(-1, 1.0, 1.0));
    Sleep(testTime);
    CHECK(StopMedia(0));
    ANL();

    base->DeleteChannel(0);
    base->DeleteChannel(1);

    // SetChannelOutputVolumePan
    //
    // Ensure that all cases sound OK and that the mixer changes state between
    // mono and stereo as it should. A debugger is required to trace the state
    // transitions.

    base->CreateChannel();
    base->CreateChannel();

    Test(">> Verify correct mixing in stereo using"
        " SetChannelOutputVolumePan():\n");

    Test("(ch 0) Playing 16kHz file locally <=> mixing in mono @ 16kHz...");
    CHECK(StartMedia(0, 12345, false, true, false, false, true));
    Sleep(testTime);
    Test("(ch 0) Panning channel volume to the left <=> mixing in stereo @ "
        "16kHz...");
    CHECK(volume->SetOutputVolumePan(0, 1.0, 0.0));
    Sleep(testTime);
    Test("(ch 0) Panning channel volume to the right <=> mixing in stereo"
        " @ 16kHz...");
    CHECK(volume->SetOutputVolumePan(0, 0.0, 1.0));
    Sleep(testTime);
    Test("(ch 0) Back to center volume again <=> mixing in mono @"
        " 16kHz...");
    CHECK(volume->SetOutputVolumePan(0, 1.0, 1.0));
    Sleep(testTime);
    Test("(ch 1) Playing 16kHz file locally <=> mixing in mono @ 16kHz...");
    CHECK(StartMedia(1, 54321, false, true, false, false, true));
    Sleep(testTime);
    Test("(ch 1) Panning channel volume to the left <=> mixing in stereo "
        "@ 16kHz...");
    CHECK(volume->SetOutputVolumePan(1, 1.0, 0.0));
    Sleep(testTime);
    Test("(ch 1) Back to center volume again <=> mixing in mono @ 16kHz...");
    CHECK(volume->SetOutputVolumePan(1, 1.0, 1.0));
    Sleep(testTime);
    Test("(ch 1) Stopped playing file <=> mixing in mono @ 16kHz...");
    CHECK(StopMedia(1));
    Sleep(testTime);
    CHECK(StopMedia(0));
    ANL();

    base->DeleteChannel(0);
    base->DeleteChannel(1);

    // Emulate stereo-encoding using Encryption
    //
    // Modify the transmitted RTP stream by using external encryption.
    // Supports frame based and sample based "stereo-encoding schemes".

    base->CreateChannel();

    Test(">> Verify correct mixing in stereo using emulated stereo input:\n");

    // enable external encryption
    CHECK(encrypt->RegisterExternalEncryption(0, *this));
    Test("(ch 0) External Encryption is now enabled:");

    Test("(ch 0) Sending file at 8kHz <=> mixing in mono @ 8kHz...");
    CHECK(StartMedia(0, 12345, true, true, true, true, false));
    Sleep(testTime);

    // switch to 16kHz (L16) sending codec
    CHECK(codec->SetSendCodec(0, l16_16));
    Test("(ch 0) Sending file at 16kHz (L16) <=> mixing in mono @ 16kHz...");
    Sleep(testTime);

    // register L16 as 2-channel codec on receiving side =>
    // should sound bad since RTP module splits all received packets in half
    // (sample based)
    CHECK(base->StopPlayout(0));
    CHECK(base->StopReceive(0));
    l16_16.channels = 2;
    CHECK(codec->SetRecPayloadType(0, l16_16));
    CHECK(base->StartReceive(0));
    CHECK(base->StartPlayout(0));
    Test("(ch 0) 16kHz L16 is now registered as 2-channel codec on RX side => "
        "should sound bad...");
    Sleep(testTime);

    // emulate sample-based stereo encoding
    Test("(ch 0) Emulate sample-based stereo encoding on sending side => "
        "should sound OK...");
    SetStereoExternalEncryption(0, true, 16);
    Sleep(testTime);
    Test("(ch 0) Stop emulating sample-based stereo encoding on sending side =>"
        " should sound bad...");
    SetStereoExternalEncryption(0, false, 16);
    Sleep(testTime);
    Test("(ch 0) Emulate sample-based stereo encoding on sending side => "
        "should sound OK...");
    SetStereoExternalEncryption(0, true, 16);
    Sleep(testTime);

    // switch to 32kHz (L16) sending codec and disable stereo encoding
    CHECK(codec->SetSendCodec(0, l16_32));
    SetStereoExternalEncryption(0, false, 16);
    Test("(ch 0) Sending file and spech at 32kHz (L16) <=> mixing in mono @ "
        "32kHz...");
    Sleep(testTime);

    // register L16 32kHz as 2-channel codec on receiving side 
    CHECK(base->StopPlayout(0));
    CHECK(base->StopReceive(0));
    l16_32.channels = 2;
    CHECK(codec->SetRecPayloadType(0, l16_32));
    CHECK(base->StartReceive(0));
    CHECK(base->StartPlayout(0));
    Test("(ch 0) 32kHz L16 is now registered as 2-channel codec on RX side =>"
        " should sound bad...");
    Sleep(testTime);

    // emulate sample-based stereo encoding
    Test("(ch 0) Emulate sample-based stereo encoding on sending side =>"
        " should sound OK...");
    SetStereoExternalEncryption(0, true, 16);
    Sleep(testTime);

    StopMedia(0);
    l16_32.channels = 1;

    // disable external encryption
    CHECK(encrypt->DeRegisterExternalEncryption(0));
    ANL();

    base->DeleteChannel(0);

    // ------------------
    // Verify put-on-hold
    // ------------------

    base->CreateChannel();
    base->CreateChannel();

    Test(">> Verify put-on-hold functionality:\n");

    Test("(ch 0) Sending at 8kHz...");
    CHECK(StartMedia(0, 12345, true, true, true, true, false));
    Sleep(testTime);

    CHECK(base->SetOnHoldStatus(0, true, kHoldPlayOnly));
    Test("(ch 0) Playout is now on hold...");
    Sleep(testTime);
    CHECK(base->SetOnHoldStatus(0, false, kHoldPlayOnly));
    Test("(ch 0) Playout is now enabled again...");
    Sleep(testTime);

    Test("(ch 0) Sending at 16kHz...");
    l16_16.channels = 1;
    CHECK(codec->SetSendCodec(0, l16_16));
    Sleep(testTime);

    CHECK(base->SetOnHoldStatus(0, true, kHoldPlayOnly));
    Test("(ch 0) Playout is now on hold...");
    Sleep(testTime);
    CHECK(base->SetOnHoldStatus(0, false, kHoldPlayOnly));
    Test("(ch 0) Playout is now enabled again...");
    Sleep(testTime);

    Test("(ch 0) Perform minor panning to the left to force mixing in"
        " stereo...");
    CHECK(volume->SetOutputVolumePan(0, (float)1.0, (float)0.7));
    Sleep(testTime);

    CHECK(base->SetOnHoldStatus(0, true, kHoldPlayOnly));
    Test("(ch 0) Playout is now on hold...");
    Sleep(testTime);
    CHECK(base->SetOnHoldStatus(0, false, kHoldPlayOnly));
    Test("(ch 0) Playout is now enabled again...");
    Sleep(testTime);

    Test("(ch 0) Back to center volume again...");
    CHECK(volume->SetOutputVolumePan(0, 1.0, 1.0));
    Sleep(testTime);

    Test("(ch 1) Add 16kHz local file to the mixer...");
    CHECK(StartMedia(1, 54321, false, true, false, false, true));
    Sleep(testTime);

    CHECK(base->SetOnHoldStatus(0, true, kHoldPlayOnly));
    Test("(ch 0) Playout is now on hold...");
    Sleep(testTime);
    CHECK(base->SetOnHoldStatus(1, true, kHoldPlayOnly));
    Test("(ch 1) Playout is now on hold => should be silent...");
    Sleep(testTime);
    CHECK(base->SetOnHoldStatus(0, false, kHoldPlayOnly));
    Test("(ch 0) Playout is now enabled again...");
    CHECK(base->SetOnHoldStatus(1, false, kHoldPlayOnly));
    Test("(ch 1) Playout is now enabled again...");
    Sleep(testTime);
    StopMedia(1);
    Test("(ch 1) Stopped playing file...");
    Sleep(testTime);
    StopMedia(0);
    ANL();

    base->DeleteChannel(0);
    base->DeleteChannel(1);

    // -----------------------------------
    // Verify recording of playout to file
    // -----------------------------------

    // StartRecordingPlayout
    //
    // Verify that the correct set of signals is recorded in the mixer.
    // Record each channel and all channels (-1) to ensure that post and pre
    // mixing recording works.

    base->CreateChannel();
    base->CreateChannel();

    Test(">> Verify file-recording functionality:\n");

    Test("(ch 0) Sending at 8kHz...");
    CHECK(StartMedia(0, 12345, true, true, true, true, false));
    Sleep(testTime);

    Test("(ch 0) Recording of playout to 16kHz PCM file...");
    CHECK(file->StartRecordingPlayout(
        0, GetFilename("RecordedPlayout16kHz.pcm"), NULL));
    Sleep(testTime);
    CHECK(file->StopRecordingPlayout(0));

    Test("(ch 0) Playing out the recorded file...");
    CHECK(volume->SetInputMute(0, true));
    CHECK(file->StartPlayingFileLocally(
        0, GetFilename("RecordedPlayout16kHz.pcm")));
    Sleep(testTime);
    CHECK(file->StopPlayingFileLocally(0));
    CHECK(volume->SetInputMute(0, false));

    CHECK(codec->SetSendCodec(0, l16_16));
    Test("(ch 0) Sending at 16kHz (L16)...");
    Sleep(testTime);

    Test("(ch 0) Recording of playout to 16kHz PCM file...");
    CHECK(file->StartRecordingPlayout(
        0, GetFilename("RecordedPlayout16kHz.pcm"), NULL));
    Sleep(testTime);
    CHECK(file->StopRecordingPlayout(0));

    Test("(ch 0) Playing out the recorded file...");
    CHECK(volume->SetInputMute(0, true));
    CHECK(file->StartPlayingFileLocally(
        0, GetFilename("RecordedPlayout16kHz.pcm")));
    Sleep(testTime);
    CHECK(file->StopPlayingFileLocally(0));
    CHECK(volume->SetInputMute(0, false));

    CHECK(codec->SetSendCodec(0, l16_32));
    Test("(ch 0) Sending at 32kHz (L16)...");
    Sleep(testTime);

    Test("(ch 0) Recording of playout to 16kHz PCM file...");
    CHECK(file->StartRecordingPlayout(
        0, GetFilename("RecordedPlayout16kHz.pcm"), NULL));
    Sleep(testTime);
    CHECK(file->StopRecordingPlayout(0));

    Test("(ch 0) Playing out the recorded file...");
    CHECK(volume->SetInputMute(0, true));
    CHECK(file->StartPlayingFileLocally(
        0, GetFilename("RecordedPlayout16kHz.pcm")));
    Sleep(testTime);
    CHECK(file->StopPlayingFileLocally(0));
    CHECK(volume->SetInputMute(0, false));

    Test("(ch 0) Sending at 16kHz without file as mic but file added on the"
        " playout side instead...");
    CHECK(StopMedia(0));
    CHECK(StartMedia(0, 12345, false, true, false, false, true));
    CHECK(codec->SetSendCodec(0, l16_16));
    Sleep(testTime);

    Test("(ch 0) Recording of playout to 16kHz PCM file...");
    CHECK(file->StartRecordingPlayout(
        0, GetFilename("RecordedPlayout16kHz.pcm"), NULL));
    Sleep(testTime);
    CHECK(file->StopRecordingPlayout(0));
    CHECK(file->StopPlayingFileLocally(0));

    Test("(ch 0) Playing out the recorded file...");
    CHECK(file->StartPlayingFileLocally(
        0, GetFilename("RecordedPlayout16kHz.pcm")));
    Sleep(testTime);
    CHECK(file->StopPlayingFileLocally(0));

    CHECK(StopMedia(0));
    CHECK(StopMedia(1));

    Test("(ch 0) Sending at 16kHz...");
    CHECK(StartMedia(0, 12345, true, true, true, false, false));
    CHECK(codec->SetSendCodec(0, l16_16));
    Test("(ch 1) Adding playout file...");
    CHECK(StartMedia(1, 33333, false, true, false, false, true));
    Sleep(testTime);

    Test("(ch -1) Speak while recording all channels to add mixer input on "
        "channel 0...");
    CHECK(file->StartRecordingPlayout(
        -1, GetFilename("RecordedPlayout16kHz.pcm"), NULL));
    Sleep(testTime);
    CHECK(file->StopRecordingPlayout(-1));
    CHECK(file->StopPlayingFileLocally(1));

    Test("(ch 0) Playing out the recorded file...");
    CHECK(volume->SetInputMute(0, true));
    CHECK(file->StartPlayingFileLocally(
        0, GetFilename("RecordedPlayout16kHz.pcm")));
    Sleep(testTime);
    CHECK(file->StopPlayingFileLocally(0));
    CHECK(volume->SetInputMute(0, false));

    CHECK(StopMedia(0));
    CHECK(StopMedia(1));
    ANL();

    // StartRecordingPlayoutStereo

    Test(">> Verify recording of playout in stereo:\n");

    Test("(ch 0) Sending at 32kHz...");
    CHECK(codec->SetSendCodec(0, l16_16));
    CHECK(StartMedia(0, 12345, true, true, true, true, false));
    Sleep(testTime);

    Test("Modified master balance (L=10%%, R=100%%) to force stereo mixing...");
    CHECK(volume->SetOutputVolumePan(-1, (float)0.1, (float)1.0));
    Sleep(testTime);

    /*
     Test("Recording of left and right channel playout to two 16kHz PCM "
         "files...");
     file->StartRecordingPlayoutStereo(
         GetFilename("RecordedPlayout_Left_16kHz.pcm"),
         GetFilename("RecordedPlayout_Right_16kHz.pcm"), StereoBoth);
     Sleep(testTime);
     Test("Back to center volume again...");
     CHECK(volume->SetOutputVolumePan(-1, (float)1.0, (float)1.0));
     */

    Test("(ch 0) Playing out the recorded file for the left channel (10%%)...");
    CHECK(volume->SetInputMute(0, true));
    CHECK(file->StartPlayingFileLocally(
        0, GetFilename("RecordedPlayout_Left_16kHz.pcm")));
    Sleep(testTime);
    CHECK(file->StopPlayingFileLocally(0));

    Test("(ch 0) Playing out the recorded file for the right channel (100%%) =>"
        " should sound louder than the left channel...");
    CHECK(file->StartPlayingFileLocally(
        0, GetFilename("RecordedPlayout_Right_16kHz.pcm")));
    Sleep(testTime);
    CHECK(file->StopPlayingFileLocally(0));
    CHECK(volume->SetInputMute(0, false));

    base->DeleteChannel(0);
    base->DeleteChannel(1);
    ANL();

    // ---------------------------
    // Verify inserted Dtmf tones
    // ---------------------------

    Test(">> Verify Dtmf feedback functionality:\n");

    base->CreateChannel();

    for (int i = 0; i < 2; i++)
    {
        if (i == 0)
            Test("Dtmf direct feedback is now enabled...");
        else
            Test("Dtmf direct feedback is now disabled...");

        CHECK(dtmf->SetDtmfFeedbackStatus(true, (i==0)));

        Test("(ch 0) Sending at 32kHz using G.722.1C...");
        CHECK(codec->SetRecPayloadType(0, g722_1c_32));
        CHECK(codec->SetSendCodec(0, g722_1c_32));
        CHECK(StartMedia(0, 12345, true, true, true, false, false));
        Sleep(500);

        Test("(ch 0) Sending outband Dtmf events => ensure that they are added"
            " to the mixer...");
        // ensure that receiver will not play out outband Dtmf
        CHECK(dtmf->SetSendTelephoneEventPayloadType(0, 118));
        CHECK(dtmf->SendTelephoneEvent(0, 9, true, 390));
        Sleep(500);
        CHECK(dtmf->SendTelephoneEvent(0, 1, true, 390));
        Sleep(500);
        CHECK(dtmf->SendTelephoneEvent(0, 5, true, 390));
        Sleep(500);
        Sleep(testTime - 1500);

        Test("(ch 0) Changing codec to 8kHz PCMU...");
        CHECK(codec->SetSendCodec(0, pcmu_8));
        Sleep(500);

        Test("(ch 0) Sending outband Dtmf events => ensure that they are added"
            " to the mixer...");
        CHECK(dtmf->SendTelephoneEvent(0, 9, true, 390));
        Sleep(500);
        CHECK(dtmf->SendTelephoneEvent(0, 1, true, 390));
        Sleep(500);
        CHECK(dtmf->SendTelephoneEvent(0, 5, true, 390));
        Sleep(500);
        Sleep(testTime - 1500);

        Test("(ch 0) Changing codec to 16kHz L16...");
        CHECK(codec->SetSendCodec(0, l16_16));
        Sleep(500);

        Test("(ch 0) Sending outband Dtmf events => ensure that they are added"
             " to the mixer...");
        CHECK(dtmf->SendTelephoneEvent(0, 9, true, 390));
        Sleep(500);
        CHECK(dtmf->SendTelephoneEvent(0, 1, true, 390));
        Sleep(500);
        CHECK(dtmf->SendTelephoneEvent(0, 5, true, 390));
        Sleep(500);
        Sleep(testTime - 1500);

        StopMedia(0);
        ANL();
    }

    base->DeleteChannel(0);

    // ---------------------------
    // Verify external processing
    // --------------------------

    base->CreateChannel();

    Test(">> Verify external media processing:\n");

    Test("(ch 0) Playing 16kHz file locally <=> mixing in mono @ 16kHz...");
    CHECK(StartMedia(0, 12345, false, true, false, false, true));
    Sleep(testTime);
    Test("Enabling playout external media processing => played audio should "
        "now be affected");
    CHECK(xmedia->RegisterExternalMediaProcessing(
        0, kPlaybackAllChannelsMixed, mpobj));
    Sleep(testTime);
    Test("(ch 0) Sending speech at 32kHz <=> mixing at 32kHz...");
    CHECK(codec->SetSendCodec(0, l16_32));
    Sleep(testTime);
    printf("Back to normal again\n");
    CHECK(xmedia->DeRegisterExternalMediaProcessing(0,
                                                    kPlaybackAllChannelsMixed));
    Sleep(testTime);
    printf("Enabling playout external media processing on ch 0 => "
        "played audio should now be affected\n");
    CHECK(xmedia->RegisterExternalMediaProcessing(0, kPlaybackPerChannel,
                                                  mpobj));
    Sleep(testTime);
    Test("Panning volume to the right <=> mixing in stereo @ 32kHz...");
    CHECK(volume->SetOutputVolumePan(-1, 0.0, 1.0));
    Sleep(testTime);
    Test("Back to center volume again <=> mixing in mono @ 32kHz...");
    CHECK(volume->SetOutputVolumePan(-1, 1.0, 1.0));
    Sleep(testTime);
    printf("Back to normal again\n");
    CHECK(xmedia->DeRegisterExternalMediaProcessing(0, kPlaybackPerChannel));
    Sleep(testTime);
    CHECK(StopMedia(0));
    ANL();

    base->DeleteChannel(0);

    // --------------------------------------------------
    // Extended tests of emulated stereo encoding schemes
    // --------------------------------------------------

    CodecInst PCMU;
    CodecInst G729;
    CodecInst L16_8;
    CodecInst L16_16;
    CodecInst L16_32;

    base->CreateChannel();

    Test(">> Verify emulated stereo encoding for differenct codecs:\n");

    // enable external encryption
    CHECK(encrypt->RegisterExternalEncryption(0, *this));
    Test("(ch 0) External Encryption is now enabled:");

    // register all codecs on the receiving side
    strcpy(PCMU.plname, "PCMU");
    PCMU.channels = 2;
    PCMU.pacsize = 160;
    PCMU.plfreq = 8000;
    PCMU.pltype = 125;
    PCMU.rate = 64000;
    CHECK(codec->SetRecPayloadType(0, PCMU));

    strcpy(G729.plname, "G729");
    G729.channels = 2;
    G729.pacsize = 160;
    G729.plfreq = 8000;
    G729.pltype = 18;
    G729.rate = 8000;
    CHECK(codec->SetRecPayloadType(0, G729));

    strcpy(L16_8.plname, "L16");
    L16_8.channels = 2;
    L16_8.pacsize = 160;
    L16_8.plfreq = 8000;
    L16_8.pltype = 120;
    L16_8.rate = 128000;
    CHECK(codec->SetRecPayloadType(0, L16_8));

    strcpy(L16_16.plname, "L16");
    L16_16.channels = 2;
    L16_16.pacsize = 320;
    L16_16.plfreq = 16000;
    L16_16.pltype = 121;
    L16_16.rate = 256000;
    CHECK(codec->SetRecPayloadType(0, L16_16));

    // NOTE - we cannot send larger than 1500 bytes per RTP packet
    strcpy(L16_32.plname, "L16");
    L16_32.channels = 2;
    L16_32.pacsize = 320;
    L16_32.plfreq = 32000;
    L16_32.pltype = 122;
    L16_32.rate = 512000;
    CHECK(codec->SetRecPayloadType(0, L16_32));

    // sample-based, 8-bits per sample

    Test("(ch 0) Sending using G.711 (sample based, 8 bits/sample)...");
    PCMU.channels = 1;
    CHECK(codec->SetSendCodec(0, PCMU));
    SetStereoExternalEncryption(0, true, 8);
    CHECK(StartMedia(0, 12345, true, true, true, true, false));
    Sleep(testTime);

    // sample-based, 16-bits per sample

    Test("(ch 0) Sending using L16 8kHz (sample based, 16 bits/sample)...");
    L16_8.channels = 1;
    CHECK(codec->SetSendCodec(0, L16_8));
    SetStereoExternalEncryption(0, true, 16);
    Sleep(testTime);

    Test("(ch 0) Sending using L16 16kHz (sample based, 16 bits/sample)...");
    L16_16.channels = 1;
    CHECK(codec->SetSendCodec(0, L16_16));
    Sleep(testTime);

    Test("(ch 0) Sending using L16 32kHz (sample based, 16 bits/sample)...");
    L16_32.channels = 1;
    CHECK(codec->SetSendCodec(0, L16_32));
    Sleep(testTime);

    Test("(ch 0) Sending using G.729 (frame based)...");
    G729.channels = 1;
    CHECK(codec->SetSendCodec(0, G729));
    Sleep(testTime);

    StopMedia(0);

    // disable external encryption
    CHECK(encrypt->DeRegisterExternalEncryption(0));

    base->DeleteChannel(0);

    // ------------------------------------------------------------------------

    CHECK(base->Terminate());

    printf("\n\n------------------------------------------------\n");
    printf(" Test passed!\n");
    printf("------------------------------------------------\n\n");

    return 0;
}

}  // namespace voetest