C++ lisp::t方法代码示例

// (unbind-playback)
base::cell_t unbind_playback(base::lisp &gl, base::cell_t, base::cells_t &) {
	if (pl) {
		pl->enabled = false;
		return gl.t();
	}
	return gl.nil();
}

// (ctags-remove (string|id)) -> nil/t
base::cell_t ctags_remove(base::lisp &gl, base::cell_t c, base::cells_t &ret) {
	if (base::lisp::validate(c, base::cell::list(1), base::cell::typeString)) {
		const auto &key = c + 1;
		removeTag(key->s);
		return gl.t();
	}
	gl.signalError("ctags-set: invalid arguments, expected (string int any)");
	return gl.nil();
}

// (ctags-load (string|file-name)) -> nil/t
base::cell_t ctags_load(base::lisp &gl, base::cell_t c, base::cells_t &ret) {
	if (base::lisp::validate(c, base::cell::list(1), base::cell::typeString)) {
		const auto &fileName = c + 1;
		if (loadTags(fileName->s))
			return gl.t();
		return gl.nil();
	}
	gl.signalError("ctags-load: invalid arguments, expected (string)");
	return gl.nil();
}

// (ctags-set (string|id) (int|item-index) any) -> nil/t
base::cell_t ctags_set(base::lisp &gl, base::cell_t c, base::cells_t &ret) {
	if (base::lisp::validate(c, base::cell::list(3), base::cell::typeString, base::cell::typeInt /* any */)) {
		const auto &key = c + 1;
		const auto &num = c + 2;
		const auto &value = c + 3;
		setCustomTag(key->s, num->i, *value);
		return gl.t();
	}
	gl.signalError("ctags-set: invalid arguments, expected (string int any)");
	return gl.nil();
}

//- LISP API -
// playback-set-file (string)fileName -> t/nil
base::cell_t set_file(base::lisp &gl, base::cell_t c, base::cells_t &) {
	if (base::lisp::validate(c, base::cell::list(1), base::cell::typeString)) {
		const auto &fname = c + 1;

		// stop current playback
		ts.stop();
		ts.setSource(nullptr);
		frs = nullptr;
		AudioFormatReader *r;

		// ectract CUE information (if any)
		std::regex cue("^(.*):(\\d+):(\\d+)$");
		std::smatch result;
		std::regex_search(fname->s, result, cue);
		if (result.size() == 4) {
			// is cue
			int32 start = base::fromStr<int32>(result[2].str());
			int32 end = base::fromStr<int32>(result[3].str());
			int32 duration = end - start;

			AudioFormatReader *tr = fm.createReaderFor(File(result[1].str()));

			// start, end are in frames (1 frame = 1/75 second) - convert to sample
			float samplesInOneSecond = tr->sampleRate; // AudioSubsectionReader will handle channels count
			float startSecond = (float)start / 75.0f;
			float durationSecond = (float)duration / 75.0f;
			float startSample = startSecond * samplesInOneSecond;
			float durationSamples = durationSecond * samplesInOneSecond;

			// some CUE may have 0 length (play to end)
			if (end <= start)
				durationSamples = tr->lengthInSamples;

			r = new AudioSubsectionReader(tr, (int)startSample, (int)durationSamples, true);
		}
		else {
			// regular file
			r = fm.createReaderFor(File(fname->s));
		}

		if (r) {
			frs = new AudioFormatReaderSource(r, true);
			ts.setSource(frs, 32768, &thread, r->sampleRate);
			return gl.t();
		}
		gl.signalError(base::strs("file not found or file format not supported: ", fname->s));
		return gl.nil();
	}
	gl.signalError("playback-set-file: invalid arguments, expected (string)");
	return gl.nil();
}

// (bind-playback (id)callback)
base::cell_t bind_playback(base::lisp &gl, base::cell_t c, base::cells_t &) {
	if (pl) {
		if (base::lisp::validate(c, base::cell::list(1), base::cell::typeIdentifier)) {
			const auto &fx = c + 1;
			pl->functionId = fx->s;
			pl->enabled = true;
			return gl.t();
		}
		pl->enabled = false;
		return gl.nil();
	}
	gl.signalError("bind-playback: invalid arguments, expected (id)");
	return gl.nil();
}

// (playback-gain (float|optional)gain) -> t/nil | gain
base::cell_t gain(base::lisp &gl, base::cell_t c, base::cells_t &ret) {
	if (pl) {
		if (base::lisp::validate(c, base::cell::listRange(1), base::cell::typeFloat)) {
			// setter
			ts.setGain((c + 1)->f);
			return gl.t();
		}
		else if (base::lisp::validate(c, base::cell::list(0))) {
			// getter
			ret.push_back(base::cell(ts.getGain()));
			return ret.end();
		}
		gl.signalError("playback-gain: invalid arguments, expected ((optional) float)");
	}
	return gl.nil();
}

//- LISP API -
// playback-set-file (string)fileName -> t/nil
base::cell_t set_file(base::lisp &gl, base::cell_t c, base::cells_t &) {
    if (base::lisp::validate(c, base::cell::list(1), base::cell::typeString)) {
        const auto &fname = c + 1;

        // stop current playback
        ts.stop();
        ts.setSource(nullptr);
        frs = nullptr;

        AudioFormatReader *r;

        // ectract CUE information (if any)
        std::regex cue("^(.*):(\\d+):(\\d+)$");
        std::smatch result;
        std::regex_search(fname->s, result, cue);
        if (result.size() == 4) {
            // is cue
            int32 start = base::fromStr<int32>(result[2].str());
            int32 end = base::fromStr<int32>(result[3].str());
            AudioFormatReader *tr = fm.createReaderFor(File(result[1].str()));
            r = new AudioSubsectionReader(tr, start, end - start, true);
        }
        else {
            // regular file
            r = fm.createReaderFor(File(fname->s));
        }

        if (r) {
            frs = new AudioFormatReaderSource(r, true);
            ts.setSource(frs, 32768, &thread, r->sampleRate);
            return gl.t();
        }
        gl.signalError(base::strs("file not found or file format not supported: ", fname->s));
        return gl.nil();
    }
    gl.signalError("playback-set-file: invalid arguments, expected (string)");
    return gl.nil();
}

// playback-finished -> t/nil
base::cell_t finished_playing(base::lisp &gl, base::cell_t, base::cells_t &) {
	if (ts.hasStreamFinished())
		return gl.t();
	return gl.nil();
}

// playback-is-playing -> t/nil
base::cell_t is_playing(base::lisp &gl, base::cell_t, base::cells_t &) {
	if (ts.isPlaying())
		return gl.t();
	return gl.nil();
}