specific_output_source_selector.h

/*
 * Copyright (c) 2014-2023 Synthstrom Audible Limited
 *
 * This file is part of The Synthstrom Audible Deluge Firmware.
 *
 * The Synthstrom Audible Deluge Firmware is free software: you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program.
 * If not, see <https://www.gnu.org/licenses/>.
 */
#pragma once
#include "gui/context_menu/audio_input_selector.h"
#include "gui/menu_item/menu_item.h"
#include "hid/display/display.h"
#include "hid/display/oled.h"
#include "model/song/song.h"
#include "processing/audio_output.h"
 
namespace deluge::gui::menu_item::audio_clip {
class SpecificSourceOutputSelector final : public MenuItem {
public:
    using MenuItem::MenuItem;
 
    void beginSession(MenuItem* navigatedBackwardFrom) override {
        audioOutputBeingEdited = (AudioOutput*)getCurrentOutput();
        numOutputs = currentSong->getNumOutputs();
 
        Output* selectedOutput = audioOutputBeingEdited->getOutputRecordingFrom();
        outputIndex = getRecordableOutputIndex(selectedOutput);
        if (outputIndex < 0) {
            // If the stored source was removed or became invalid, land on the first valid target instead.
            outputIndex = getNextRecordableOutputIndex(-1, 1);
            selectedOutput = getOutputFromSelectedIndex();
            audioOutputBeingEdited->setOutputRecordingFrom(selectedOutput);
        }
 
        if (outputIndex < 0) {
            outputIndex = 0;
        }
        if (display->haveOLED()) {
            renderUIsForOled();
        }
        else {
            drawFor7seg(); // Probably not necessary either...
        }
    }
 
    void selectEncoderAction(int32_t offset) override {
        int32_t newOutputIndex = getNextRecordableOutputIndex(outputIndex, offset);
        if (newOutputIndex < 0) {
            return;
        }
        outputIndex = newOutputIndex;
        auto newRecordingFrom = getOutputFromSelectedIndex();
        audioOutputBeingEdited->setOutputRecordingFrom(newRecordingFrom);
        if (display->haveOLED()) {
            renderUIsForOled();
        }
        else {
            drawFor7seg(); // Probably not necessary either...
        }
    }
    void drawPixelsForOled() override {
        deluge::hid::display::oled_canvas::Canvas& canvas = hid::display::OLED::main;
 
        // track
        Output* output = getOutputFromSelectedIndex();
        if (!output) {
            canvas.drawStringCentred("No track", OLED_MAIN_TOPMOST_PIXEL + 21, kTextSpacingX, kTextSpacingY);
            return;
        }
 
        // track type
        OutputType outputType = output->type;
 
        // for midi instruments, get the channel
        int32_t channel = 0;
        if (outputType == OutputType::MIDI_OUT) {
            Instrument* instrument = (Instrument*)output;
            channel = ((NonAudioInstrument*)instrument)->getChannel();
        }
 
        char const* outputTypeText = getOutputTypeName(outputType, channel);
 
        // draw the track type
        canvas.drawStringCentred(outputTypeText, OLED_MAIN_TOPMOST_PIXEL + 14, kTextSpacingX, kTextSpacingY);
 
        int32_t yPos = OLED_MAIN_TOPMOST_PIXEL + 28;
 
        // draw the track name
        char const* name = output->name.get();
 
        int32_t stringLengthPixels = canvas.getStringWidthInPixels(name, kTextTitleSizeY);
 
        if (stringLengthPixels <= OLED_MAIN_WIDTH_PIXELS) {
            canvas.drawStringCentred(name, yPos, kTextTitleSpacingX, kTextTitleSizeY);
        }
        else {
            canvas.drawString(name, 0, yPos, kTextTitleSpacingX, kTextTitleSizeY);
            deluge::hid::display::OLED::setupSideScroller(0, name, 0, OLED_MAIN_WIDTH_PIXELS, yPos,
                                                          yPos + kTextTitleSizeY, kTextTitleSpacingX, kTextTitleSizeY,
                                                          false);
        }
    }
 
    void drawFor7seg() {
        Output* output = getOutputFromSelectedIndex();
        char const* text = output ? output->name.get() : "No track";
        display->setScrollingText(text, 0);
    }
 
    bool isRelevant(ModControllableAudio* modControllable, int32_t whichThing) const override {
        auto* output = getCurrentOutput();
        return output and output->type == OutputType::AUDIO
               and ((AudioOutput*)output)->inputChannel == AudioInputChannel::SPECIFIC_OUTPUT;
    }
 
    bool shouldEnterSubmenu() override { return true; }
 
    AudioOutput* audioOutputBeingEdited{nullptr};
    // this is the index that the output is recording from
    int32_t outputIndex{0};
    int32_t numOutputs{0};
 
private:
    bool canRecordFromOutput(Output* output) const { return audioOutputBeingEdited->canRecordFrom(output); }
 
    int32_t getRecordableOutputIndex(Output* output) const {
        if (!canRecordFromOutput(output)) {
            return -1;
        }
 
        // Only outputs still in the main song list are selectable; hibernated instruments should not display here.
        int32_t index = 0;
        for (Output* candidate = currentSong->firstOutput; candidate; candidate = candidate->next) {
            if (candidate == output) {
                return index;
            }
            index++;
        }
 
        return -1;
    }
 
    Output* getOutputFromSelectedIndex() const {
        Output* output = currentSong->getOutputFromIndex(outputIndex);
        return canRecordFromOutput(output) ? output : nullptr;
    }
 
    int32_t getNextRecordableOutputIndex(int32_t startIndex, int32_t offset) const {
        if (offset == 0) {
            return getOutputFromSelectedIndex()
                       ? outputIndex
                       : getRecordableOutputIndex(audioOutputBeingEdited->getOutputRecordingFrom());
        }
 
        int32_t direction = offset > 0 ? 1 : -1;
        int32_t steps = offset > 0 ? offset : -offset;
        int32_t selectedIndex = startIndex;
 
        for (int32_t step = 0; step < steps; step++) {
            int32_t candidateIndex = selectedIndex;
            // Walk the raw song indices, but stop only on rows the audio track can actually record from.
            while (true) {
                candidateIndex += direction;
                if (candidateIndex < 0 || candidateIndex >= numOutputs) {
                    return selectedIndex;
                }
 
                Output* candidate = currentSong->getOutputFromIndex(candidateIndex);
                if (canRecordFromOutput(candidate)) {
                    selectedIndex = candidateIndex;
                    break;
                }
            }
        }
 
        return selectedIndex;
    }
};
} // namespace deluge::gui::menu_item::audio_clip