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Timeline.cpp
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Timeline.cpp
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/**
* @file
* @brief Source file for Timeline class
* @author Jonathan Thomas <jonathan@openshot.org>
*
* @ref License
*/
/* LICENSE
*
* Copyright (c) 2008-2019 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/Timeline.h"
using namespace openshot;
// Default Constructor for the timeline (which sets the canvas width and height)
Timeline::Timeline(int width, int height, Fraction fps, int sample_rate, int channels, ChannelLayout channel_layout) :
is_open(false), auto_map_clips(true), managed_cache(true)
{
// Create CrashHandler and Attach (incase of errors)
CrashHandler::Instance();
// Init viewport size (curve based, because it can be animated)
viewport_scale = Keyframe(100.0);
viewport_x = Keyframe(0.0);
viewport_y = Keyframe(0.0);
// Init background color
color.red = Keyframe(0.0);
color.green = Keyframe(0.0);
color.blue = Keyframe(0.0);
// Init FileInfo struct (clear all values)
info.width = width;
info.height = height;
info.fps = fps;
info.sample_rate = sample_rate;
info.channels = channels;
info.channel_layout = channel_layout;
info.video_timebase = fps.Reciprocal();
info.duration = 60 * 30; // 30 minute default duration
info.has_audio = true;
info.has_video = true;
info.video_length = info.fps.ToFloat() * info.duration;
info.display_ratio = openshot::Fraction(width, height);
info.display_ratio.Reduce();
info.pixel_ratio = openshot::Fraction(1, 1);
// Init max image size
SetMaxSize(info.width, info.height);
// Init cache
final_cache = new CacheMemory();
final_cache->SetMaxBytesFromInfo(OPEN_MP_NUM_PROCESSORS * 2, info.width, info.height, info.sample_rate, info.channels);
}
Timeline::~Timeline() {
if (is_open)
// Auto Close if not already
Close();
// Free all allocated frame mappers
set<FrameMapper *>::iterator frame_mapper_itr;
for (frame_mapper_itr = allocated_frame_mappers.begin(); frame_mapper_itr != allocated_frame_mappers.end(); ++frame_mapper_itr) {
// Get frame mapper object from the iterator
FrameMapper *frame_mapper = (*frame_mapper_itr);
frame_mapper->Reader(NULL);
frame_mapper->Close();
delete frame_mapper;
}
allocated_frame_mappers.clear();
// Destroy previous cache (if managed by timeline)
if (managed_cache && final_cache) {
delete final_cache;
final_cache = NULL;
}
}
// Add an openshot::Clip to the timeline
void Timeline::AddClip(Clip* clip)
{
// All clips should be converted to the frame rate of this timeline
if (auto_map_clips)
// Apply framemapper (or update existing framemapper)
apply_mapper_to_clip(clip);
// Add clip to list
clips.push_back(clip);
// Sort clips
sort_clips();
}
// Add an effect to the timeline
void Timeline::AddEffect(EffectBase* effect)
{
// Add effect to list
effects.push_back(effect);
// Sort effects
sort_effects();
}
// Remove an effect from the timeline
void Timeline::RemoveEffect(EffectBase* effect)
{
effects.remove(effect);
}
// Remove an openshot::Clip to the timeline
void Timeline::RemoveClip(Clip* clip)
{
clips.remove(clip);
}
// Apply a FrameMapper to a clip which matches the settings of this timeline
void Timeline::apply_mapper_to_clip(Clip* clip)
{
// Get lock (prevent getting frames while this happens)
const GenericScopedLock<CriticalSection> lock(getFrameCriticalSection);
// Determine type of reader
ReaderBase* clip_reader = NULL;
if (clip->Reader()->Name() == "FrameMapper")
{
// Get the existing reader
clip_reader = (ReaderBase*) clip->Reader();
} else {
// Create a new FrameMapper to wrap the current reader
FrameMapper* mapper = new FrameMapper(clip->Reader(), info.fps, PULLDOWN_NONE, info.sample_rate, info.channels, info.channel_layout);
allocated_frame_mappers.insert(mapper);
clip_reader = (ReaderBase*) mapper;
}
// Update the mapping
FrameMapper* clip_mapped_reader = (FrameMapper*) clip_reader;
clip_mapped_reader->ChangeMapping(info.fps, PULLDOWN_NONE, info.sample_rate, info.channels, info.channel_layout);
// Update clip reader
clip->Reader(clip_reader);
}
// Apply the timeline's framerate and samplerate to all clips
void Timeline::ApplyMapperToClips()
{
// Clear all cached frames
ClearAllCache();
// Loop through all clips
list<Clip*>::iterator clip_itr;
for (clip_itr=clips.begin(); clip_itr != clips.end(); ++clip_itr)
{
// Get clip object from the iterator
Clip *clip = (*clip_itr);
// Apply framemapper (or update existing framemapper)
apply_mapper_to_clip(clip);
}
}
// Calculate time of a frame number, based on a framerate
double Timeline::calculate_time(int64_t number, Fraction rate)
{
// Get float version of fps fraction
double raw_fps = rate.ToFloat();
// Return the time (in seconds) of this frame
return double(number - 1) / raw_fps;
}
// Apply effects to the source frame (if any)
std::shared_ptr<Frame> Timeline::apply_effects(std::shared_ptr<Frame> frame, int64_t timeline_frame_number, int layer)
{
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::apply_effects", "frame->number", frame->number, "timeline_frame_number", timeline_frame_number, "layer", layer);
// Find Effects at this position and layer
list<EffectBase*>::iterator effect_itr;
for (effect_itr=effects.begin(); effect_itr != effects.end(); ++effect_itr)
{
// Get effect object from the iterator
EffectBase *effect = (*effect_itr);
// Does clip intersect the current requested time
long effect_start_position = round(effect->Position() * info.fps.ToDouble()) + 1;
long effect_end_position = round((effect->Position() + (effect->Duration())) * info.fps.ToDouble()) + 1;
bool does_effect_intersect = (effect_start_position <= timeline_frame_number && effect_end_position >= timeline_frame_number && effect->Layer() == layer);
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::apply_effects (Does effect intersect)", "effect->Position()", effect->Position(), "does_effect_intersect", does_effect_intersect, "timeline_frame_number", timeline_frame_number, "layer", layer);
// Clip is visible
if (does_effect_intersect)
{
// Determine the frame needed for this clip (based on the position on the timeline)
long effect_start_frame = (effect->Start() * info.fps.ToDouble()) + 1;
long effect_frame_number = timeline_frame_number - effect_start_position + effect_start_frame;
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::apply_effects (Process Effect)", "effect_frame_number", effect_frame_number, "does_effect_intersect", does_effect_intersect);
// Apply the effect to this frame
frame = effect->GetFrame(frame, effect_frame_number);
}
} // end effect loop
// Return modified frame
return frame;
}
// Get or generate a blank frame
std::shared_ptr<Frame> Timeline::GetOrCreateFrame(Clip* clip, int64_t number)
{
std::shared_ptr<Frame> new_frame;
// Init some basic properties about this frame
int samples_in_frame = Frame::GetSamplesPerFrame(number, info.fps, info.sample_rate, info.channels);
try {
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::GetOrCreateFrame (from reader)", "number", number, "samples_in_frame", samples_in_frame);
// Attempt to get a frame (but this could fail if a reader has just been closed)
#pragma omp critical (T_GetOtCreateFrame)
new_frame = std::shared_ptr<Frame>(clip->GetFrame(number));
// Return real frame
return new_frame;
} catch (const ReaderClosed & e) {
// ...
} catch (const TooManySeeks & e) {
// ...
} catch (const OutOfBoundsFrame & e) {
// ...
}
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::GetOrCreateFrame (create blank)", "number", number, "samples_in_frame", samples_in_frame);
// Create blank frame
new_frame = std::make_shared<Frame>(number, Settings::Instance()->MAX_WIDTH, Settings::Instance()->MAX_HEIGHT, "#000000", samples_in_frame, info.channels);
#pragma omp critical (T_GetOtCreateFrame)
{
new_frame->SampleRate(info.sample_rate);
new_frame->ChannelsLayout(info.channel_layout);
}
return new_frame;
}
// Process a new layer of video or audio
void Timeline::add_layer(std::shared_ptr<Frame> new_frame, Clip* source_clip, int64_t clip_frame_number, int64_t timeline_frame_number, bool is_top_clip, float max_volume)
{
// Get the clip's frame & image
std::shared_ptr<Frame> source_frame;
#pragma omp critical (T_addLayer)
source_frame = GetOrCreateFrame(source_clip, clip_frame_number);
// No frame found... so bail
if (!source_frame)
return;
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::add_layer", "new_frame->number", new_frame->number, "clip_frame_number", clip_frame_number, "timeline_frame_number", timeline_frame_number);
/* REPLACE IMAGE WITH WAVEFORM IMAGE (IF NEEDED) */
if (source_clip->Waveform())
{
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::add_layer (Generate Waveform Image)", "source_frame->number", source_frame->number, "source_clip->Waveform()", source_clip->Waveform(), "clip_frame_number", clip_frame_number);
// Get the color of the waveform
int red = source_clip->wave_color.red.GetInt(clip_frame_number);
int green = source_clip->wave_color.green.GetInt(clip_frame_number);
int blue = source_clip->wave_color.blue.GetInt(clip_frame_number);
int alpha = source_clip->wave_color.alpha.GetInt(clip_frame_number);
// Generate Waveform Dynamically (the size of the timeline)
std::shared_ptr<QImage> source_image;
#pragma omp critical (T_addLayer)
source_image = source_frame->GetWaveform(Settings::Instance()->MAX_WIDTH, Settings::Instance()->MAX_HEIGHT, red, green, blue, alpha);
source_frame->AddImage(std::shared_ptr<QImage>(source_image));
}
/* Apply effects to the source frame (if any). If multiple clips are overlapping, only process the
* effects on the top clip. */
if (is_top_clip && source_frame) {
#pragma omp critical (T_addLayer)
source_frame = apply_effects(source_frame, timeline_frame_number, source_clip->Layer());
}
// Declare an image to hold the source frame's image
std::shared_ptr<QImage> source_image;
/* COPY AUDIO - with correct volume */
if (source_clip->Reader()->info.has_audio) {
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::add_layer (Copy Audio)", "source_clip->Reader()->info.has_audio", source_clip->Reader()->info.has_audio, "source_frame->GetAudioChannelsCount()", source_frame->GetAudioChannelsCount(), "info.channels", info.channels, "clip_frame_number", clip_frame_number, "timeline_frame_number", timeline_frame_number);
if (source_frame->GetAudioChannelsCount() == info.channels && source_clip->has_audio.GetInt(clip_frame_number) != 0)
for (int channel = 0; channel < source_frame->GetAudioChannelsCount(); channel++)
{
// Get volume from previous frame and this frame
float previous_volume = source_clip->volume.GetValue(clip_frame_number - 1);
float volume = source_clip->volume.GetValue(clip_frame_number);
int channel_filter = source_clip->channel_filter.GetInt(clip_frame_number); // optional channel to filter (if not -1)
int channel_mapping = source_clip->channel_mapping.GetInt(clip_frame_number); // optional channel to map this channel to (if not -1)
// Apply volume mixing strategy
if (source_clip->mixing == VOLUME_MIX_AVERAGE && max_volume > 1.0) {
// Don't allow this clip to exceed 100% (divide volume equally between all overlapping clips with volume
previous_volume = previous_volume / max_volume;
volume = volume / max_volume;
}
else if (source_clip->mixing == VOLUME_MIX_REDUCE && max_volume > 1.0) {
// Reduce clip volume by a bit, hoping it will prevent exceeding 100% (but it is very possible it will)
previous_volume = previous_volume * 0.77;
volume = volume * 0.77;
}
// If channel filter enabled, check for correct channel (and skip non-matching channels)
if (channel_filter != -1 && channel_filter != channel)
continue; // skip to next channel
// If no volume on this frame or previous frame, do nothing
if (previous_volume == 0.0 && volume == 0.0)
continue; // skip to next channel
// If channel mapping disabled, just use the current channel
if (channel_mapping == -1)
channel_mapping = channel;
// Apply ramp to source frame (if needed)
if (!isEqual(previous_volume, 1.0) || !isEqual(volume, 1.0))
source_frame->ApplyGainRamp(channel_mapping, 0, source_frame->GetAudioSamplesCount(), previous_volume, volume);
// TODO: Improve FrameMapper (or Timeline) to always get the correct number of samples per frame.
// Currently, the ResampleContext sometimes leaves behind a few samples for the next call, and the
// number of samples returned is variable... and does not match the number expected.
// This is a crude solution at best. =)
if (new_frame->GetAudioSamplesCount() != source_frame->GetAudioSamplesCount())
// Force timeline frame to match the source frame
#pragma omp critical (T_addLayer)
new_frame->ResizeAudio(info.channels, source_frame->GetAudioSamplesCount(), info.sample_rate, info.channel_layout);
// Copy audio samples (and set initial volume). Mix samples with existing audio samples. The gains are added together, to
// be sure to set the gain's correctly, so the sum does not exceed 1.0 (of audio distortion will happen).
#pragma omp critical (T_addLayer)
new_frame->AddAudio(false, channel_mapping, 0, source_frame->GetAudioSamples(channel), source_frame->GetAudioSamplesCount(), 1.0);
}
else
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::add_layer (No Audio Copied - Wrong # of Channels)", "source_clip->Reader()->info.has_audio", source_clip->Reader()->info.has_audio, "source_frame->GetAudioChannelsCount()", source_frame->GetAudioChannelsCount(), "info.channels", info.channels, "clip_frame_number", clip_frame_number, "timeline_frame_number", timeline_frame_number);
}
// Skip out if only an audio frame
if (!source_clip->Waveform() && !source_clip->Reader()->info.has_video)
// Skip the rest of the image processing for performance reasons
return;
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::add_layer (Get Source Image)", "source_frame->number", source_frame->number, "source_clip->Waveform()", source_clip->Waveform(), "clip_frame_number", clip_frame_number);
// Get actual frame image data
source_image = source_frame->GetImage();
/* ALPHA & OPACITY */
if (source_clip->alpha.GetValue(clip_frame_number) != 1.0)
{
float alpha = source_clip->alpha.GetValue(clip_frame_number);
// Get source image's pixels
unsigned char *pixels = (unsigned char *) source_image->bits();
// Loop through pixels
for (int pixel = 0, byte_index=0; pixel < source_image->width() * source_image->height(); pixel++, byte_index+=4)
{
// Get the alpha values from the pixel
int A = pixels[byte_index + 3];
// Apply alpha to pixel
pixels[byte_index + 3] *= alpha;
}
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::add_layer (Set Alpha & Opacity)", "alpha", alpha, "source_frame->number", source_frame->number, "clip_frame_number", clip_frame_number);
}
/* RESIZE SOURCE IMAGE - based on scale type */
QSize source_size = source_image->size();
switch (source_clip->scale)
{
case (SCALE_FIT): {
// keep aspect ratio
source_size.scale(Settings::Instance()->MAX_WIDTH, Settings::Instance()->MAX_HEIGHT, Qt::KeepAspectRatio);
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::add_layer (Scale: SCALE_FIT)", "source_frame->number", source_frame->number, "source_width", source_size.width(), "source_height", source_size.height());
break;
}
case (SCALE_STRETCH): {
// ignore aspect ratio
source_size.scale(Settings::Instance()->MAX_WIDTH, Settings::Instance()->MAX_HEIGHT, Qt::IgnoreAspectRatio);
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::add_layer (Scale: SCALE_STRETCH)", "source_frame->number", source_frame->number, "source_width", source_size.width(), "source_height", source_size.height());
break;
}
case (SCALE_CROP): {
QSize width_size(Settings::Instance()->MAX_WIDTH, round(Settings::Instance()->MAX_WIDTH / (float(source_size.width()) / float(source_size.height()))));
QSize height_size(round(Settings::Instance()->MAX_HEIGHT / (float(source_size.height()) / float(source_size.width()))), Settings::Instance()->MAX_HEIGHT);
// respect aspect ratio
if (width_size.width() >= Settings::Instance()->MAX_WIDTH && width_size.height() >= Settings::Instance()->MAX_HEIGHT)
source_size.scale(width_size.width(), width_size.height(), Qt::KeepAspectRatio);
else
source_size.scale(height_size.width(), height_size.height(), Qt::KeepAspectRatio);
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::add_layer (Scale: SCALE_CROP)", "source_frame->number", source_frame->number, "source_width", source_size.width(), "source_height", source_size.height());
break;
}
case (SCALE_NONE): {
// Calculate ratio of source size to project size
// Even with no scaling, previews need to be adjusted correctly
// (otherwise NONE scaling draws the frame image outside of the preview)
float source_width_ratio = source_size.width() / float(info.width);
float source_height_ratio = source_size.height() / float(info.height);
source_size.scale(Settings::Instance()->MAX_WIDTH * source_width_ratio, Settings::Instance()->MAX_HEIGHT * source_height_ratio, Qt::KeepAspectRatio);
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::add_layer (Scale: SCALE_NONE)", "source_frame->number", source_frame->number, "source_width", source_size.width(), "source_height", source_size.height());
break;
}
}
float crop_x = source_clip->crop_x.GetValue(clip_frame_number);
float crop_y = source_clip->crop_y.GetValue(clip_frame_number);
float crop_w = source_clip->crop_width.GetValue(clip_frame_number);
float crop_h = source_clip->crop_height.GetValue(clip_frame_number);
switch(source_clip->crop_gravity)
{
case (GRAVITY_TOP):
crop_x += 0.5;
break;
case (GRAVITY_TOP_RIGHT):
crop_x += 1.0;
break;
case (GRAVITY_LEFT):
crop_y += 0.5;
break;
case (GRAVITY_CENTER):
crop_x += 0.5;
crop_y += 0.5;
break;
case (GRAVITY_RIGHT):
crop_x += 1.0;
crop_y += 0.5;
break;
case (GRAVITY_BOTTOM_LEFT):
crop_y += 1.0;
break;
case (GRAVITY_BOTTOM):
crop_x += 0.5;
crop_y += 1.0;
break;
case (GRAVITY_BOTTOM_RIGHT):
crop_x += 1.0;
crop_y += 1.0;
break;
}
/* GRAVITY LOCATION - Initialize X & Y to the correct values (before applying location curves) */
float x = 0.0; // left
float y = 0.0; // top
// Adjust size for scale x and scale y
float sx = source_clip->scale_x.GetValue(clip_frame_number); // percentage X scale
float sy = source_clip->scale_y.GetValue(clip_frame_number); // percentage Y scale
float scaled_source_width = source_size.width() * sx;
float scaled_source_height = source_size.height() * sy;
switch (source_clip->gravity)
{
case (GRAVITY_TOP):
x = (Settings::Instance()->MAX_WIDTH - scaled_source_width) / 2.0; // center
break;
case (GRAVITY_TOP_RIGHT):
x = Settings::Instance()->MAX_WIDTH - scaled_source_width; // right
break;
case (GRAVITY_LEFT):
y = (Settings::Instance()->MAX_HEIGHT - scaled_source_height) / 2.0; // center
break;
case (GRAVITY_CENTER):
x = (Settings::Instance()->MAX_WIDTH - scaled_source_width) / 2.0; // center
y = (Settings::Instance()->MAX_HEIGHT - scaled_source_height) / 2.0; // center
break;
case (GRAVITY_RIGHT):
x = Settings::Instance()->MAX_WIDTH - scaled_source_width; // right
y = (Settings::Instance()->MAX_HEIGHT - scaled_source_height) / 2.0; // center
break;
case (GRAVITY_BOTTOM_LEFT):
y = (Settings::Instance()->MAX_HEIGHT - scaled_source_height); // bottom
break;
case (GRAVITY_BOTTOM):
x = (Settings::Instance()->MAX_WIDTH - scaled_source_width) / 2.0; // center
y = (Settings::Instance()->MAX_HEIGHT - scaled_source_height); // bottom
break;
case (GRAVITY_BOTTOM_RIGHT):
x = Settings::Instance()->MAX_WIDTH - scaled_source_width; // right
y = (Settings::Instance()->MAX_HEIGHT - scaled_source_height); // bottom
break;
}
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::add_layer (Gravity)", "source_frame->number", source_frame->number, "source_clip->gravity", source_clip->gravity, "info.width", info.width, "scaled_source_width", scaled_source_width, "info.height", info.height, "scaled_source_height", scaled_source_height);
/* LOCATION, ROTATION, AND SCALE */
float r = source_clip->rotation.GetValue(clip_frame_number); // rotate in degrees
x += (Settings::Instance()->MAX_WIDTH * source_clip->location_x.GetValue(clip_frame_number)); // move in percentage of final width
y += (Settings::Instance()->MAX_HEIGHT * source_clip->location_y.GetValue(clip_frame_number)); // move in percentage of final height
float shear_x = source_clip->shear_x.GetValue(clip_frame_number);
float shear_y = source_clip->shear_y.GetValue(clip_frame_number);
bool transformed = false;
QTransform transform;
// Transform source image (if needed)
ZmqLogger::Instance()->AppendDebugMethod("Timeline::add_layer (Build QTransform - if needed)", "source_frame->number", source_frame->number, "x", x, "y", y, "r", r, "sx", sx, "sy", sy);
if (!isEqual(r, 0)) {
// ROTATE CLIP
float origin_x = x + (scaled_source_width / 2.0);
float origin_y = y + (scaled_source_height / 2.0);
transform.translate(origin_x, origin_y);
transform.rotate(r);
transform.translate(-origin_x,-origin_y);
transformed = true;
}
if (!isEqual(x, 0) || !isEqual(y, 0)) {
// TRANSLATE/MOVE CLIP
transform.translate(x, y);
transformed = true;
}
// SCALE CLIP (if needed)
float source_width_scale = (float(source_size.width()) / float(source_image->width())) * sx;
float source_height_scale = (float(source_size.height()) / float(source_image->height())) * sy;
if (!isEqual(source_width_scale, 1.0) || !isEqual(source_height_scale, 1.0)) {
transform.scale(source_width_scale, source_height_scale);
transformed = true;
}
if (!isEqual(shear_x, 0) || !isEqual(shear_y, 0)) {
// SHEAR HEIGHT/WIDTH
transform.shear(shear_x, shear_y);
transformed = true;
}
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::add_layer (Transform: Composite Image Layer: Prepare)", "source_frame->number", source_frame->number, "new_frame->GetImage()->width()", new_frame->GetImage()->width(), "transformed", transformed);
/* COMPOSITE SOURCE IMAGE (LAYER) ONTO FINAL IMAGE */
std::shared_ptr<QImage> new_image;
#pragma omp critical (T_addLayer)
new_image = new_frame->GetImage();
// Load timeline's new frame image into a QPainter
QPainter painter(new_image.get());
painter.setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform | QPainter::TextAntialiasing, true);
// Apply transform (translate, rotate, scale)... if any
if (transformed)
painter.setTransform(transform);
// Composite a new layer onto the image
painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
painter.drawImage(0, 0, *source_image, crop_x * source_image->width(), crop_y * source_image->height(), crop_w * source_image->width(), crop_h * source_image->height());
// Draw frame #'s on top of image (if needed)
if (source_clip->display != FRAME_DISPLAY_NONE) {
stringstream frame_number_str;
switch (source_clip->display)
{
case (FRAME_DISPLAY_CLIP):
frame_number_str << clip_frame_number;
break;
case (FRAME_DISPLAY_TIMELINE):
frame_number_str << timeline_frame_number;
break;
case (FRAME_DISPLAY_BOTH):
frame_number_str << timeline_frame_number << " (" << clip_frame_number << ")";
break;
}
// Draw frame number on top of image
painter.setPen(QColor("#ffffff"));
painter.drawText(20, 20, QString(frame_number_str.str().c_str()));
}
painter.end();
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::add_layer (Transform: Composite Image Layer: Completed)", "source_frame->number", source_frame->number, "new_frame->GetImage()->width()", new_frame->GetImage()->width(), "transformed", transformed);
}
// Update the list of 'opened' clips
void Timeline::update_open_clips(Clip *clip, bool does_clip_intersect)
{
ZmqLogger::Instance()->AppendDebugMethod("Timeline::update_open_clips (before)", "does_clip_intersect", does_clip_intersect, "closing_clips.size()", closing_clips.size(), "open_clips.size()", open_clips.size());
// is clip already in list?
bool clip_found = open_clips.count(clip);
if (clip_found && !does_clip_intersect)
{
// Remove clip from 'opened' list, because it's closed now
open_clips.erase(clip);
// Close clip
clip->Close();
}
else if (!clip_found && does_clip_intersect)
{
// Add clip to 'opened' list, because it's missing
open_clips[clip] = clip;
try {
// Open the clip
clip->Open();
} catch (const InvalidFile & e) {
// ...
}
}
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::update_open_clips (after)", "does_clip_intersect", does_clip_intersect, "clip_found", clip_found, "closing_clips.size()", closing_clips.size(), "open_clips.size()", open_clips.size());
}
// Sort clips by position on the timeline
void Timeline::sort_clips()
{
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::SortClips", "clips.size()", clips.size());
// sort clips
clips.sort(CompareClips());
}
// Sort effects by position on the timeline
void Timeline::sort_effects()
{
// sort clips
effects.sort(CompareEffects());
}
// Close the reader (and any resources it was consuming)
void Timeline::Close()
{
ZmqLogger::Instance()->AppendDebugMethod("Timeline::Close");
// Close all open clips
list<Clip*>::iterator clip_itr;
for (clip_itr=clips.begin(); clip_itr != clips.end(); ++clip_itr)
{
// Get clip object from the iterator
Clip *clip = (*clip_itr);
// Open or Close this clip, based on if it's intersecting or not
update_open_clips(clip, false);
}
// Mark timeline as closed
is_open = false;
// Clear cache
final_cache->Clear();
}
// Open the reader (and start consuming resources)
void Timeline::Open()
{
is_open = true;
}
// Compare 2 floating point numbers for equality
bool Timeline::isEqual(double a, double b)
{
return fabs(a - b) < 0.000001;
}
// Get an openshot::Frame object for a specific frame number of this reader.
std::shared_ptr<Frame> Timeline::GetFrame(int64_t requested_frame)
{
// Adjust out of bounds frame number
if (requested_frame < 1)
requested_frame = 1;
// Check cache
std::shared_ptr<Frame> frame;
#pragma omp critical (T_GetFrame)
frame = final_cache->GetFrame(requested_frame);
if (frame) {
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::GetFrame (Cached frame found)", "requested_frame", requested_frame);
// Return cached frame
return frame;
}
else
{
// Create a scoped lock, allowing only a single thread to run the following code at one time
const GenericScopedLock<CriticalSection> lock(getFrameCriticalSection);
// Check for open reader (or throw exception)
if (!is_open)
throw ReaderClosed("The Timeline is closed. Call Open() before calling this method.", "");
// Check cache again (due to locking)
#pragma omp critical (T_GetFrame)
frame = final_cache->GetFrame(requested_frame);
if (frame) {
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::GetFrame (Cached frame found on 2nd look)", "requested_frame", requested_frame);
// Return cached frame
return frame;
}
// Minimum number of frames to process (for performance reasons)
int minimum_frames = OPEN_MP_NUM_PROCESSORS;
// Get a list of clips that intersect with the requested section of timeline
// This also opens the readers for intersecting clips, and marks non-intersecting clips as 'needs closing'
vector<Clip*> nearby_clips;
#pragma omp critical (T_GetFrame)
nearby_clips = find_intersecting_clips(requested_frame, minimum_frames, true);
omp_set_num_threads(OPEN_MP_NUM_PROCESSORS);
// Allow nested OpenMP sections
omp_set_nested(true);
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::GetFrame", "requested_frame", requested_frame, "minimum_frames", minimum_frames, "OPEN_MP_NUM_PROCESSORS", OPEN_MP_NUM_PROCESSORS);
// GENERATE CACHE FOR CLIPS (IN FRAME # SEQUENCE)
// Determine all clip frames, and request them in order (to keep resampled audio in sequence)
for (int64_t frame_number = requested_frame; frame_number < requested_frame + minimum_frames; frame_number++)
{
// Loop through clips
for (int clip_index = 0; clip_index < nearby_clips.size(); clip_index++)
{
// Get clip object from the iterator
Clip *clip = nearby_clips[clip_index];
long clip_start_position = round(clip->Position() * info.fps.ToDouble()) + 1;
long clip_end_position = round((clip->Position() + clip->Duration()) * info.fps.ToDouble()) + 1;
bool does_clip_intersect = (clip_start_position <= frame_number && clip_end_position >= frame_number);
if (does_clip_intersect)
{
// Get clip frame #
long clip_start_frame = (clip->Start() * info.fps.ToDouble()) + 1;
long clip_frame_number = frame_number - clip_start_position + clip_start_frame;
// Cache clip object
clip->GetFrame(clip_frame_number);
}
}
}
#pragma omp parallel
{
// Loop through all requested frames
#pragma omp for ordered firstprivate(nearby_clips, requested_frame, minimum_frames) schedule(static,1)
for (int64_t frame_number = requested_frame; frame_number < requested_frame + minimum_frames; frame_number++)
{
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::GetFrame (processing frame)", "frame_number", frame_number, "omp_get_thread_num()", omp_get_thread_num());
// Init some basic properties about this frame
int samples_in_frame = Frame::GetSamplesPerFrame(frame_number, info.fps, info.sample_rate, info.channels);
// Create blank frame (which will become the requested frame)
std::shared_ptr<Frame> new_frame(std::make_shared<Frame>(frame_number, Settings::Instance()->MAX_WIDTH, Settings::Instance()->MAX_HEIGHT, "#000000", samples_in_frame, info.channels));
#pragma omp critical (T_GetFrame)
{
new_frame->AddAudioSilence(samples_in_frame);
new_frame->SampleRate(info.sample_rate);
new_frame->ChannelsLayout(info.channel_layout);
}
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::GetFrame (Adding solid color)", "frame_number", frame_number, "info.width", info.width, "info.height", info.height);
// Add Background Color to 1st layer (if animated or not black)
if ((color.red.Points.size() > 1 || color.green.Points.size() > 1 || color.blue.Points.size() > 1) ||
(color.red.GetValue(frame_number) != 0.0 || color.green.GetValue(frame_number) != 0.0 || color.blue.GetValue(frame_number) != 0.0))
new_frame->AddColor(Settings::Instance()->MAX_WIDTH, Settings::Instance()->MAX_HEIGHT, color.GetColorHex(frame_number));
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::GetFrame (Loop through clips)", "frame_number", frame_number, "clips.size()", clips.size(), "nearby_clips.size()", nearby_clips.size());
// Find Clips near this time
for (int clip_index = 0; clip_index < nearby_clips.size(); clip_index++)
{
// Get clip object from the iterator
Clip *clip = nearby_clips[clip_index];
long clip_start_position = round(clip->Position() * info.fps.ToDouble()) + 1;
long clip_end_position = round((clip->Position() + clip->Duration()) * info.fps.ToDouble()) + 1;
bool does_clip_intersect = (clip_start_position <= frame_number && clip_end_position >= frame_number);
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::GetFrame (Does clip intersect)", "frame_number", frame_number, "clip->Position()", clip->Position(), "clip->Duration()", clip->Duration(), "does_clip_intersect", does_clip_intersect);
// Clip is visible
if (does_clip_intersect)
{
// Determine if clip is "top" clip on this layer (only happens when multiple clips are overlapping)
bool is_top_clip = true;
float max_volume = 0.0;
for (int top_clip_index = 0; top_clip_index < nearby_clips.size(); top_clip_index++)
{
Clip *nearby_clip = nearby_clips[top_clip_index];
long nearby_clip_start_position = round(nearby_clip->Position() * info.fps.ToDouble()) + 1;
long nearby_clip_end_position = round((nearby_clip->Position() + nearby_clip->Duration()) * info.fps.ToDouble()) + 1;
long nearby_clip_start_frame = (nearby_clip->Start() * info.fps.ToDouble()) + 1;
long nearby_clip_frame_number = frame_number - nearby_clip_start_position + nearby_clip_start_frame;
// Determine if top clip
if (clip->Id() != nearby_clip->Id() && clip->Layer() == nearby_clip->Layer() &&
nearby_clip_start_position <= frame_number && nearby_clip_end_position >= frame_number &&
nearby_clip_start_position > clip_start_position && is_top_clip == true) {
is_top_clip = false;
}
// Determine max volume of overlapping clips
if (nearby_clip->Reader() && nearby_clip->Reader()->info.has_audio &&
nearby_clip->has_audio.GetInt(nearby_clip_frame_number) != 0 &&
nearby_clip_start_position <= frame_number && nearby_clip_end_position >= frame_number) {
max_volume += nearby_clip->volume.GetValue(nearby_clip_frame_number);
}
}
// Determine the frame needed for this clip (based on the position on the timeline)
long clip_start_frame = (clip->Start() * info.fps.ToDouble()) + 1;
long clip_frame_number = frame_number - clip_start_position + clip_start_frame;
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::GetFrame (Calculate clip's frame #)", "clip->Position()", clip->Position(), "clip->Start()", clip->Start(), "info.fps.ToFloat()", info.fps.ToFloat(), "clip_frame_number", clip_frame_number);
// Add clip's frame as layer
add_layer(new_frame, clip, clip_frame_number, frame_number, is_top_clip, max_volume);
} else
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::GetFrame (clip does not intersect)", "frame_number", frame_number, "does_clip_intersect", does_clip_intersect);
} // end clip loop
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::GetFrame (Add frame to cache)", "frame_number", frame_number, "info.width", info.width, "info.height", info.height);
// Set frame # on mapped frame
#pragma omp ordered
{
new_frame->SetFrameNumber(frame_number);
// Add final frame to cache
final_cache->Add(new_frame);
}
} // end frame loop
} // end parallel
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::GetFrame (end parallel region)", "requested_frame", requested_frame, "omp_get_thread_num()", omp_get_thread_num());
// Return frame (or blank frame)
return final_cache->GetFrame(requested_frame);
}
}
// Find intersecting clips (or non intersecting clips)
vector<Clip*> Timeline::find_intersecting_clips(int64_t requested_frame, int number_of_frames, bool include)
{
// Find matching clips
vector<Clip*> matching_clips;
// Calculate time of frame
float min_requested_frame = requested_frame;
float max_requested_frame = requested_frame + (number_of_frames - 1);
// Re-Sort Clips (since they likely changed)
sort_clips();
// Find Clips at this time
list<Clip*>::iterator clip_itr;
for (clip_itr=clips.begin(); clip_itr != clips.end(); ++clip_itr)
{
// Get clip object from the iterator
Clip *clip = (*clip_itr);
// Does clip intersect the current requested time
long clip_start_position = round(clip->Position() * info.fps.ToDouble()) + 1;
long clip_end_position = round((clip->Position() + clip->Duration()) * info.fps.ToDouble()) + 1;
bool does_clip_intersect =
(clip_start_position <= min_requested_frame || clip_start_position <= max_requested_frame) &&
(clip_end_position >= min_requested_frame || clip_end_position >= max_requested_frame);
// Debug output
ZmqLogger::Instance()->AppendDebugMethod("Timeline::find_intersecting_clips (Is clip near or intersecting)", "requested_frame", requested_frame, "min_requested_frame", min_requested_frame, "max_requested_frame", max_requested_frame, "clip->Position()", clip->Position(), "does_clip_intersect", does_clip_intersect);
// Open (or schedule for closing) this clip, based on if it's intersecting or not
#pragma omp critical (reader_lock)
update_open_clips(clip, does_clip_intersect);
// Clip is visible
if (does_clip_intersect && include)
// Add the intersecting clip
matching_clips.push_back(clip);
else if (!does_clip_intersect && !include)
// Add the non-intersecting clip
matching_clips.push_back(clip);
} // end clip loop
// return list
return matching_clips;
}
// Set the cache object used by this reader
void Timeline::SetCache(CacheBase* new_cache) {
// Destroy previous cache (if managed by timeline)
if (managed_cache && final_cache) {
delete final_cache;
final_cache = NULL;
managed_cache = false;
}
// Set new cache
final_cache = new_cache;
}
// Generate JSON string of this object
string Timeline::Json() {
// Return formatted string
return JsonValue().toStyledString();
}
// Generate Json::JsonValue for this object
Json::Value Timeline::JsonValue() {
// Create root json object
Json::Value root = ReaderBase::JsonValue(); // get parent properties
root["type"] = "Timeline";
root["viewport_scale"] = viewport_scale.JsonValue();
root["viewport_x"] = viewport_x.JsonValue();
root["viewport_y"] = viewport_y.JsonValue();
root["color"] = color.JsonValue();
// Add array of clips
root["clips"] = Json::Value(Json::arrayValue);
// Find Clips at this time