looper/loopClipState.cpp at master · AnEntrypoint/looper · GitHub

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#include "Looper.h"

#define log_name "lclip"

CString *getClipStateName(ClipState s)
{
    CString *msg = new CString();
    switch (s)
    {
        case CS_IDLE:           msg->Append("IDLE"); break;
        case CS_RECORDING:      msg->Append("RECORDING"); break;
        case CS_RECORDING_MAIN: msg->Append("RECORDING_MAIN"); break;
        case CS_RECORDING_TAIL: msg->Append("RECORDING_TAIL"); break;
        case CS_FINISHING:      msg->Append("FINISHING"); break;
        case CS_RECORDED:       msg->Append("RECORDED"); break;
        case CS_PLAYING:        msg->Append("PLAYING"); break;
        case CS_LOOPING:        msg->Append("LOOPING"); break;
        case CS_STOPPING:       msg->Append("STOPPING"); break;
        default:                msg->Append("UNKNOWN"); break;
    }
    return msg;
}

u32 loopClip::_calcQuantizeTarget()
{
    u32 M = pTheLoopMachine->m_masterLoopBlocks;
    if (M == 0) return m_record_block;

    u32 candidates[] = { M/8, M/4, M/2, M, M*2, M*4, M*8 };
    u32 best = M;
    u32 bestDist = (m_record_block > M) ? m_record_block - M : M - m_record_block;
    for (u32 i = 0; i < 7; i++)
    {
        u32 c = candidates[i];
        if (c < (u32)(CROSSFADE_BLOCKS * 2)) continue;
        u32 dist = (m_record_block > c) ? m_record_block - c : c - m_record_block;
        if (dist < bestDist) { best = c; bestDist = dist; }
    }
    return best;
}

void loopClip::updateState(u16 cur_command)
{
    LOOPER_LOG("clip(%d,%d) updateState(%s) state=%d", m_track_num, m_clip_num, getLoopCommandName(cur_command), (int)m_state);

    if (cur_command == LOOP_COMMAND_LOOP_IMMEDIATE)
    {
        switch (m_state)
        {
            case CS_RECORDING:
            case CS_RECORDING_MAIN:
            case CS_RECORDING_TAIL:
            case CS_FINISHING:
                stopImmediate();
                break;
            case CS_PLAYING:
                if (m_play_block) _startCrossFade();
                break;
            default:
                break;
        }
    }
    else if (cur_command == LOOP_COMMAND_SET_LOOP_START)
    {
        m_mark_point_active = 1;
        if (m_state == CS_PLAYING && m_play_block) _startCrossFade();
    }
    else if (cur_command == LOOP_COMMAND_STOP)
    {
        if (m_state == CS_RECORDING_MAIN)
        {
            u32 target = _calcQuantizeTarget();
            if (target <= m_record_block)
                _startEndingRecording(target, false);
            else
            {
                m_quantizeTarget = target;
                m_quantizeWillPlay = false;
            }
        }
        else if (m_state == CS_PLAYING)
        {
            if (m_play_block)
                _startFadeOut();
            else
            {
                m_state = CS_RECORDED;
                m_play_block = 0;
                m_pLoopTrack->incDecRunning(-1);
            }
        }
    }
    else if (cur_command == LOOP_COMMAND_PLAY)
    {
        if (m_state == CS_RECORDING || m_state == CS_RECORDING_MAIN)
        {
            if (m_state == CS_RECORDING && m_record_block == 0)
            {
                stopImmediate();
                return;
            }
            u32 target = _calcQuantizeTarget();
            if (target <= m_record_block)
                _startEndingRecording(target, true);
            else
            {
                m_quantizeTarget = target;
                m_quantizeWillPlay = true;
            }
        }
        if (m_state == CS_RECORDED)
            _startPlaying();
    }
    else if (cur_command == LOOP_COMMAND_RECORD)
    {
        _startRecording();
    }
}