libopenshot/src/QtPlayer.cpp

/**
 * @file
 * @brief Source file for QtPlayer class
 * @author Duzy Chan <code@duzy.info>
 * @author Jonathan Thomas <jonathan@openshot.org>
 *
 * @section LICENSE
 *
 * Copyright (c) 2008-2014 OpenShot Studios, LLC
 * <http://www.openshotstudios.com/>. This file is part of
 * OpenShot Library (libopenshot), an open-source project dedicated to
 * delivering high quality video editing and animation solutions to the
 * world. For more information visit <http://www.openshot.org/>.
 *
 * OpenShot Library (libopenshot) is free software: you can redistribute it
 * and/or modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * OpenShot Library (libopenshot) 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
 */

#include "../include/Clip.h"
#include "../include/FFmpegReader.h"
#include "../include/Timeline.h"
#include "../include/QtPlayer.h"
#include "../include/Qt/PlayerPrivate.h"
#include "../include/Qt/VideoRenderer.h"

using namespace openshot;

QtPlayer::QtPlayer() : PlayerBase(), p(new PlayerPrivate(new VideoRenderer())), threads_started(false)
{
	reader = NULL;
}

QtPlayer::QtPlayer(RendererBase *rb) : PlayerBase(), p(new PlayerPrivate(rb)), threads_started(false)
{
	reader = NULL;
}

QtPlayer::~QtPlayer()
{
    if (mode != PLAYBACK_STOPPED)
    	Stop();

    delete p;
}

void QtPlayer::CloseAudioDevice()
{
	// Close audio device (only do this once, when all audio playback is finished)
	AudioDeviceManagerSingleton::Instance()->CloseAudioDevice();
}

// Return any error string during initialization
string QtPlayer::GetError() {
	if (reader && threads_started) {
		// Get error from audio thread (if any)
		return p->audioPlayback->getError();
	} else {
		return "";
	}
}

/// Get Audio Devices from JUCE
vector<AudioDeviceInfo> QtPlayer::GetAudioDeviceNames() {
	if (reader && threads_started) {
		return p->audioPlayback->getAudioDeviceNames();
	} else {
		return vector<AudioDeviceInfo>();
	}
}

void QtPlayer::SetSource(const std::string &source)
{
	FFmpegReader *ffreader = new FFmpegReader(source);
	ffreader->DisplayInfo();

	reader = new Timeline(ffreader->info.width, ffreader->info.height, ffreader->info.fps, ffreader->info.sample_rate, ffreader->info.channels, ffreader->info.channel_layout);
	Clip *c = new Clip(source);

	Timeline* tm = (Timeline*)reader;
	tm->AddClip(c);
	tm->Open();

    // Set the reader
	Reader(reader);
}

void QtPlayer::Play()
{
	// Set mode to playing, and speed to normal
	mode = PLAYBACK_PLAY;
	Speed(1);

	if (reader && !threads_started) {
		// Start thread only once
		p->startPlayback();
		threads_started = true;
	}
}

void QtPlayer::Loading()
{
    mode = PLAYBACK_LOADING;
}

/// Get the current mode
PlaybackMode QtPlayer::Mode()
{
	return mode;
}

void QtPlayer::Pause()
{
    mode = PLAYBACK_PAUSED;
    Speed(0);
}

int QtPlayer::Position()
{
    return p->video_position;
}

void QtPlayer::Seek(int64_t new_frame)
{
	// Check for seek
	if (reader && threads_started && new_frame > 0) {
		// Notify cache thread that seek has occurred
		p->videoCache->Seek(new_frame);

		// Update current position
		p->video_position = new_frame;

		// Clear last position (to force refresh)
		p->last_video_position = 0;

		// Notify audio thread that seek has occurred
		p->audioPlayback->Seek(new_frame);
	}
}

void QtPlayer::Stop()
{
	// Change mode to stopped
	mode = PLAYBACK_STOPPED;

	// Notify threads of stopping
	if (reader && threads_started) {
		p->videoCache->Stop();
		p->audioPlayback->Stop();

		// Kill all threads
		p->stopPlayback();
	}

	p->video_position = 0;
	threads_started = false;
}

// Set the reader object
void QtPlayer::Reader(ReaderBase *new_reader)
{
	// Set new reader. Note: Be sure to close and dispose of the old reader after calling this
	reader = new_reader;
	p->reader = new_reader;
	p->videoCache->Reader(new_reader);
	p->audioPlayback->Reader(new_reader);
}

// Get the current reader, such as a FFmpegReader
ReaderBase* QtPlayer::Reader() {
	return reader;
}

// Set the QWidget pointer to display the video on (as a LONG pointer id)
void QtPlayer::SetQWidget(int64_t qwidget_address) {
	// Update override QWidget address on the video renderer
	p->renderer->OverrideWidget(qwidget_address);
}

// Get the Renderer pointer address (for Python to cast back into a QObject)
int64_t QtPlayer::GetRendererQObject() {
	return (int64_t)(VideoRenderer*)p->renderer;
}

// Get the Playback speed
float QtPlayer::Speed() {
	return speed;
}

// Set the Playback speed multiplier (1.0 = normal speed, <1.0 = slower, >1.0 faster)
void QtPlayer::Speed(float new_speed) {
	speed = new_speed;
	p->speed = new_speed;
	p->videoCache->setSpeed(new_speed);
	if (p->reader->info.has_audio)
		p->audioPlayback->setSpeed(new_speed);
}

// Get the Volume
float QtPlayer::Volume() {
	return volume;
}

// Set the Volume multiplier (1.0 = normal volume, <1.0 = quieter, >1.0 louder)
void QtPlayer::Volume(float new_volume) {
	volume = new_volume;
}