28 #include "../include/QtImageReader.h" 55 image = tr1::shared_ptr<QImage>(
new QImage());
56 bool success = image->load(QString::fromStdString(path));
59 image = tr1::shared_ptr<QImage>(
new QImage(image->convertToFormat(QImage::Format_RGBA8888)));
63 throw InvalidFile(
"File could not be opened.", path);
119 throw ReaderClosed(
"The Image is closed. Call Open() before calling this method.", path);
127 if (cached_image && !(cached_image->width() ==
max_width || cached_image->height() ==
max_height))
129 cached_image.reset();
138 cached_image = tr1::shared_ptr<QImage>(
new QImage(image->scaled(
max_width,
max_height, Qt::KeepAspectRatio, Qt::SmoothTransformation)));
139 cached_image = tr1::shared_ptr<QImage>(
new QImage(cached_image->convertToFormat(QImage::Format_RGBA8888)));
146 image_frame->AddImage(cached_image);
157 image_frame->AddImage(image);
176 root[
"type"] =
"QtImageReader";
189 bool success = reader.parse( value, root );
192 throw InvalidJSON(
"JSON could not be parsed (or is invalid)",
"");
202 throw InvalidJSON(
"JSON is invalid (missing keys or invalid data types)",
"");
213 if (!root[
"path"].isNull())
214 path = root[
"path"].asString();
long long file_size
Size of file (in bytes)
int max_height
The maximium image height needed by this clip (used for optimizations)
Json::Value JsonValue()
Generate Json::JsonValue for this object.
int num
Numerator for the fraction.
CriticalSection getFrameCriticalSection
Section lock for multiple threads.
void Open()
Open File - which is called by the constructor automatically.
QtImageReader(string path)
int width
The width of the video (in pixesl)
This class represents a single frame of video (i.e. image & audio data)
float duration
Length of time (in seconds)
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
string acodec
The name of the audio codec used to encode / decode the video stream.
void SetJson(string value)
Load JSON string into this object.
Exception when a reader is closed, and a frame is requested.
tr1::shared_ptr< Frame > GetFrame(long int requested_frame)
bool has_video
Determines if this file has a video stream.
Fraction display_ratio
The ratio of width to height of the video stream (i.e. 640x480 has a ratio of 4/3) ...
bool has_audio
Determines if this file has an audio stream.
int height
The height of the video (in pixels)
Exception for files that can not be found or opened.
This class represents a fraction.
string Json()
Get and Set JSON methods.
bool has_single_image
Determines if this file only contains a single image.
virtual Json::Value JsonValue()=0
Generate Json::JsonValue for this object.
virtual void SetJsonValue(Json::Value root)=0
Load Json::JsonValue into this object.
ReaderInfo info
Information about the current media file.
Fraction fps
Frames per second, as a fraction (i.e. 24/1 = 24 fps)
Fraction video_timebase
The video timebase determines how long each frame stays on the screen.
Fraction pixel_ratio
The pixel ratio of the video stream as a fraction (i.e. some pixels are not square) ...
This namespace is the default namespace for all code in the openshot library.
Exception for invalid JSON.
string vcodec
The name of the video codec used to encode / decode the video stream.
int den
Denominator for the fraction.
int channels
The number of audio channels used in the audio stream.
long int video_length
The number of frames in the video stream.
int max_width
The maximum image width needed by this clip (used for optimizations)
int GetSamplesPerFrame(Fraction fps, int sample_rate, int channels)
Calculate the # of samples per video frame (for the current frame number)
double ToDouble()
Return this fraction as a double (i.e. 1/2 = 0.5)
int sample_rate
The number of audio samples per second (44100 is a common sample rate)