// This method is required for all derived classes of EffectBase, and returns a
// modified openshot::Frame object
tr1::shared_ptr<Frame> Deinterlace::GetFrame(tr1::shared_ptr<Frame> frame, int frame_number)
{
// Get original size of frame's image
int original_width = frame->GetImage()->width();
int original_height = frame->GetImage()->height();
// Get the frame's image
tr1::shared_ptr<QImage> image = frame->GetImage();
const unsigned char* pixels = image->bits();
// Create a smaller, new image
QImage deinterlaced_image(image->width(), image->height() / 2, QImage::Format_RGBA8888);
const unsigned char* deinterlaced_pixels = deinterlaced_image.bits();
// Loop through the scanlines of the image (even or odd)
int start = 0;
if (isOdd)
start = 1;
for (int row = start; row < image->height(); row += 2) {
memcpy((unsigned char*)deinterlaced_pixels, pixels + (row * image->bytesPerLine()), image->bytesPerLine());
deinterlaced_pixels += image->bytesPerLine();
}
// Resize deinterlaced image back to original size, and update frame's image
image = tr1::shared_ptr<QImage>(new QImage(deinterlaced_image.scaled(original_width, original_height, Qt::IgnoreAspectRatio, Qt::FastTransformation)));
// Update image on frame
frame->AddImage(image);
// return the modified frame
return frame;
}
// This method is required for all derived classes of EffectBase, and returns a
// modified openshot::Frame object
tr1::shared_ptr<Frame> ChromaKey::GetFrame(tr1::shared_ptr<Frame> frame, int frame_number)
{
// Determine the current HSL (Hue, Saturation, Lightness) for the Chrome
int threshold = fuzz.GetInt(frame_number);
long mask_R = color.red.GetInt(frame_number);
long mask_G = color.green.GetInt(frame_number);
long mask_B = color.blue.GetInt(frame_number);
// Get source image's pixels
tr1::shared_ptr<QImage> image = frame->GetImage();
unsigned char *pixels = (unsigned char *) image->bits();
// Loop through pixels
for (int pixel = 0, byte_index=0; pixel < image->width() * image->height(); pixel++, byte_index+=4)
{
// Get the RGB values from the pixel
unsigned char R = pixels[byte_index];
unsigned char G = pixels[byte_index + 1];
unsigned char B = pixels[byte_index + 2];
unsigned char A = pixels[byte_index + 3];
// Get distance between mask color and pixel color
long distance = Color::GetDistance((long)R, (long)G, (long)B, mask_R, mask_G, mask_B);
// Alpha out the pixel (if color similar)
if (distance <= threshold)
// MATCHED - Make pixel transparent
pixels[byte_index + 3] = 0;
}
// return the modified frame
return frame;
}
// Process a new layer of video or audio
void Timeline::add_layer(tr1::shared_ptr<Frame> new_frame, Clip* source_clip, long int clip_frame_number, long int timeline_frame_number, bool is_top_clip)
{
// Get the clip's frame & image
tr1::shared_ptr<Frame> source_frame = GetOrCreateFrame(source_clip, clip_frame_number);
// No frame found... so bail
if (!source_frame)
return;
// Debug output
AppendDebugMethod("Timeline::add_layer", "new_frame->number", new_frame->number, "clip_frame_number", clip_frame_number, "timeline_frame_number", timeline_frame_number, "", -1, "", -1, "", -1);
/* REPLACE IMAGE WITH WAVEFORM IMAGE (IF NEEDED) */
if (source_clip->Waveform())
{
// Debug output
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, "", -1, "", -1, "", -1);
// 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)
tr1::shared_ptr<QImage> source_image = source_frame->GetWaveform(info.width, info.height, red, green, blue, alpha);
source_frame->AddImage(tr1::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 = apply_effects(source_frame, timeline_frame_number, source_clip->Layer());
// Declare an image to hold the source frame's image
tr1::shared_ptr<QImage> source_image;
/* COPY AUDIO - with correct volume */
if (source_clip->Reader()->info.has_audio) {
// Debug output
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, "", -1);
if (source_frame->GetAudioChannelsCount() == info.channels)
for (int channel = 0; channel < source_frame->GetAudioChannelsCount(); channel++)
{
float initial_volume = 1.0f;
float previous_volume = source_clip->volume.GetValue(clip_frame_number - 1); // previous frame's percentage of volume (0 to 1)
float volume = source_clip->volume.GetValue(clip_frame_number); // percentage of volume (0 to 1)
// If no ramp needed, set initial volume = clip's volume
if (isEqual(previous_volume, volume))
initial_volume = volume;
// Apply ramp to source frame (if needed)
if (!isEqual(previous_volume, volume))
source_frame->ApplyGainRamp(channel, 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
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).
new_frame->AddAudio(false, channel, 0, source_frame->GetAudioSamples(channel), source_frame->GetAudioSamplesCount(), initial_volume);
}
else
// Debug output
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, "", -1);
}
// 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
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, "", -1, "", -1, "", -1);
// Get actual frame image data
source_image = source_frame->GetImage();
// Get some basic image properties
int source_width = source_image->width();
int source_height = source_image->height();
/* 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
AppendDebugMethod("Timeline::add_layer (Set Alpha & Opacity)", "alpha", alpha, "source_frame->number", source_frame->number, "clip_frame_number", clip_frame_number, "", -1, "", -1, "", -1);
}
/* RESIZE SOURCE IMAGE - based on scale type */
switch (source_clip->scale)
{
case (SCALE_FIT):
// keep aspect ratio
source_image = tr1::shared_ptr<QImage>(new QImage(source_image->scaled(info.width, info.height, Qt::KeepAspectRatio, Qt::SmoothTransformation)));
source_width = source_image->width();
source_height = source_image->height();
// Debug output
AppendDebugMethod("Timeline::add_layer (Scale: SCALE_FIT)", "source_frame->number", source_frame->number, "source_width", source_width, "source_height", source_height, "", -1, "", -1, "", -1);
break;
case (SCALE_STRETCH):
// ignore aspect ratio
source_image = tr1::shared_ptr<QImage>(new QImage(source_image->scaled(info.width, info.height, Qt::IgnoreAspectRatio, Qt::SmoothTransformation)));
source_width = source_image->width();
source_height = source_image->height();
// Debug output
AppendDebugMethod("Timeline::add_layer (Scale: SCALE_STRETCH)", "source_frame->number", source_frame->number, "source_width", source_width, "source_height", source_height, "", -1, "", -1, "", -1);
break;
case (SCALE_CROP):
QSize width_size(info.width, round(info.width / (float(source_width) / float(source_height))));
QSize height_size(round(info.height / (float(source_height) / float(source_width))), info.height);
// respect aspect ratio
if (width_size.width() >= info.width && width_size.height() >= info.height)
source_image = tr1::shared_ptr<QImage>(new QImage(source_image->scaled(width_size.width(), width_size.height(), Qt::KeepAspectRatio, Qt::SmoothTransformation)));
else
source_image = tr1::shared_ptr<QImage>(new QImage(source_image->scaled(height_size.width(), height_size.height(), Qt::KeepAspectRatio, Qt::SmoothTransformation))); // height is larger, so resize to it
source_width = source_image->width();
source_height = source_image->height();
// Debug output
AppendDebugMethod("Timeline::add_layer (Scale: SCALE_CROP)", "source_frame->number", source_frame->number, "source_width", source_width, "source_height", source_height, "", -1, "", -1, "", -1);
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_width * sx;
float scaled_source_height = source_height * sy;
switch (source_clip->gravity)
{
case (GRAVITY_TOP):
x = (info.width - scaled_source_width) / 2.0; // center
break;
case (GRAVITY_TOP_RIGHT):
x = info.width - scaled_source_width; // right
break;
case (GRAVITY_LEFT):
y = (info.height - scaled_source_height) / 2.0; // center
break;
case (GRAVITY_CENTER):
x = (info.width - scaled_source_width) / 2.0; // center
y = (info.height - scaled_source_height) / 2.0; // center
break;
case (GRAVITY_RIGHT):
x = info.width - scaled_source_width; // right
y = (info.height - scaled_source_height) / 2.0; // center
break;
case (GRAVITY_BOTTOM_LEFT):
y = (info.height - scaled_source_height); // bottom
break;
case (GRAVITY_BOTTOM):
x = (info.width - scaled_source_width) / 2.0; // center
y = (info.height - scaled_source_height); // bottom
break;
case (GRAVITY_BOTTOM_RIGHT):
x = info.width - scaled_source_width; // right
y = (info.height - scaled_source_height); // bottom
break;
}
// Debug output
AppendDebugMethod("Timeline::add_layer (Gravity)", "source_frame->number", source_frame->number, "source_clip->gravity", source_clip->gravity, "info.width", info.width, "source_width", source_width, "info.height", info.height, "source_height", source_height);
/* LOCATION, ROTATION, AND SCALE */
float r = source_clip->rotation.GetValue(clip_frame_number); // rotate in degrees
x += (info.width * source_clip->location_x.GetValue(clip_frame_number)); // move in percentage of final width
y += (info.height * source_clip->location_y.GetValue(clip_frame_number)); // move in percentage of final height
bool is_x_animated = source_clip->location_x.Points.size() > 1;
bool is_y_animated = source_clip->location_y.Points.size() > 1;
int offset_x = -1;
int offset_y = -1;
bool transformed = false;
QTransform transform;
if ((!isEqual(x, 0) || !isEqual(y, 0)) && (isEqual(r, 0) && isEqual(sx, 1) && isEqual(sy, 1) && !is_x_animated && !is_y_animated))
{
// SIMPLE OFFSET
AppendDebugMethod("Timeline::add_layer (Transform: SIMPLE)", "source_frame->number", source_frame->number, "x", x, "y", y, "r", r, "sx", sx, "sy", sy);
// If only X and Y are different, and no animation is being used (just set the offset for speed)
transformed = true;
// Set QTransform
transform.translate(x, y);
} else if (!isEqual(r, 0) || !isEqual(x, 0) || !isEqual(y, 0) || !isEqual(sx, 1) || !isEqual(sy, 1))
{
// COMPLEX DISTORTION
AppendDebugMethod("Timeline::add_layer (Transform: COMPLEX)", "source_frame->number", source_frame->number, "x", x, "y", y, "r", r, "sx", sx, "sy", sy);
// Use the QTransform object, which can be very CPU intensive
transformed = true;
// Set QTransform
if (!isEqual(r, 0)) {
// ROTATE CLIP
float origin_x = x + (source_width / 2.0);
float origin_y = y + (source_height / 2.0);
transform.translate(origin_x, origin_y);
transform.rotate(r);
transform.translate(-origin_x,-origin_y);
}
// Set QTransform
if (!isEqual(x, 0) || !isEqual(y, 0)) {
// TRANSLATE/MOVE CLIP
transform.translate(x, y);
}
if (!isEqual(sx, 0) || !isEqual(sy, 0)) {
// TRANSLATE/MOVE CLIP
transform.scale(sx, sy);
}
// Debug output
AppendDebugMethod("Timeline::add_layer (Transform: COMPLEX: Completed ScaleRotateTranslateDistortion)", "source_frame->number", source_frame->number, "x", x, "y", y, "r", r, "sx", sx, "sy", sy);
}
// Debug output
AppendDebugMethod("Timeline::add_layer (Transform: Composite Image Layer: Prepare)", "source_frame->number", source_frame->number, "offset_x", offset_x, "offset_y", offset_y, "new_frame->GetImage()->width()", new_frame->GetImage()->width(), "transformed", transformed, "", -1);
/* COMPOSITE SOURCE IMAGE (LAYER) ONTO FINAL IMAGE */
tr1::shared_ptr<QImage> 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);
painter.end();
// Debug output
AppendDebugMethod("Timeline::add_layer (Transform: Composite Image Layer: Completed)", "source_frame->number", source_frame->number, "offset_x", offset_x, "offset_y", offset_y, "new_frame->GetImage()->width()", new_frame->GetImage()->width(), "transformed", transformed, "", -1);
}