Aegisub/src/audio_marker.h

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// Copyright (c) 2012, Thomas Goyne <plorkyeran@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// Aegisub Project http://www.aegisub.org/
/// @file audio_marker.h
/// @see audio_marker.cpp
/// @ingroup audio_ui
///
#pragma once
#include <libaegisub/signal.h>
#include <memory>
#include <vector>
#include <wx/string.h>
class AudioMarkerKeyframe;
class Pen;
class VideoContext;
class TimeRange;
class VideoPositionMarker;
class wxPen;
namespace agi {
class OptionValue;
struct Context;
}
#include "time_range.h"
/// @class AudioMarker
/// @brief A marker on the audio display
class AudioMarker {
public:
/// Describe which directions a marker has feet in
enum FeetStyle {
Feet_None = 0,
Feet_Left,
Feet_Right,
Feet_Both // Conveniently Feet_Left|Feet_Right
};
/// @brief Get the marker's position
/// @return The marker's position in milliseconds
virtual int GetPosition() const = 0;
/// @brief Get the marker's drawing style
/// @return A pen object describing the marker's drawing style
virtual wxPen GetStyle() const = 0;
/// @brief Get the marker's feet style
/// @return The marker's feet style
virtual FeetStyle GetFeet() const = 0;
/// @brief Retrieve whether this marker participates in snapping
/// @return True if this marker may snap to other snappable markers
///
/// If a marker being dragged returns true from this method, and another
/// marker which also returns true from this method is within range, the
/// marker being dragged will be positioned at the position of the other
/// marker if it is released while it is inside snapping range.
virtual bool CanSnap() const = 0;
};
typedef std::vector<const AudioMarker*> AudioMarkerVector;
/// Abstract interface for audio marker providers
class AudioMarkerProvider {
protected:
/// One or more of the markers provided by this object have changed
agi::signal::Signal<> AnnounceMarkerMoved;
public:
/// Virtual destructor, does nothing
virtual ~AudioMarkerProvider() { }
/// @brief Return markers in a time range
virtual void GetMarkers(const TimeRange &range, AudioMarkerVector &out) const = 0;
DEFINE_SIGNAL_ADDERS(AnnounceMarkerMoved, AddMarkerMovedListener)
};
/// @class AudioLabelProvider
/// @brief Abstract interface for audio label providers
class AudioLabelProvider {
protected:
/// One or more of the labels provided by this object have changed
agi::signal::Signal<> AnnounceLabelChanged;
public:
/// A label for a range of time on the audio display
struct AudioLabel {
/// Text of the label
wxString text;
/// Range which this label applies to
TimeRange range;
AudioLabel(wxString const& text, TimeRange const& range) : text(text), range(range) { }
};
/// Virtual destructor, does nothing
virtual ~AudioLabelProvider() { }
/// @brief Get labels in a time range
/// @param range Range of times to get labels for
/// @param[out] out Vector which should be filled with the labels
virtual void GetLabels(TimeRange const& range, std::vector<AudioLabel> &out) const = 0;
DEFINE_SIGNAL_ADDERS(AnnounceLabelChanged, AddLabelChangedListener)
};
/// Marker provider for video keyframes
class AudioMarkerProviderKeyframes final : public AudioMarkerProvider {
/// Video controller to get keyframes from
VideoContext *vc;
agi::signal::Connection keyframe_slot;
agi::signal::Connection timecode_slot;
agi::signal::Connection enabled_slot;
const agi::OptionValue *enabled_opt;
/// Current set of markers for the keyframes
std::vector<AudioMarkerKeyframe> markers;
/// Pen used for all keyframe markers, stored here for performance reasons
std::unique_ptr<Pen> style;
/// Regenerate the list of markers
void Update();
public:
/// Constructor
/// @param c Project context; must have audio and video controllers initialized
/// @param opt_name Name of the option to use to decide whether or not this provider is enabled
AudioMarkerProviderKeyframes(agi::Context *c, const char *opt_name);
/// Explicit destructor needed due to members with incomplete types
~AudioMarkerProviderKeyframes();
/// Get all keyframe markers within a range
/// @param range Time range to get markers for
/// @param[out] out Vector to fill with markers in the range
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void GetMarkers(TimeRange const& range, AudioMarkerVector &out) const override;
};
/// Marker provider for the current video playback position
class VideoPositionMarkerProvider final : public AudioMarkerProvider {
VideoContext *vc;
std::unique_ptr<VideoPositionMarker> marker;
agi::signal::Connection video_seek_slot;
agi::signal::Connection enable_opt_changed_slot;
void Update(int frame_number);
void OptChanged(agi::OptionValue const& opt);
public:
VideoPositionMarkerProvider(agi::Context *c);
~VideoPositionMarkerProvider();
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void GetMarkers(const TimeRange &range, AudioMarkerVector &out) const override;
};
/// Marker provider for lines every second
class SecondsMarkerProvider final : public AudioMarkerProvider {
struct Marker final : public AudioMarker {
Pen *style;
int position;
Marker(Pen *style) : style(style), position(0) { }
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int GetPosition() const override { return position; }
FeetStyle GetFeet() const override { return Feet_None; }
bool CanSnap() const override { return false; }
wxPen GetStyle() const override;
operator int() const { return position; }
};
/// Pen used by all seconds markers, here for performance
std::unique_ptr<Pen> pen;
/// Markers returned from last call to GetMarkers
mutable std::vector<Marker> markers;
/// Cached reference to the option to enable/disable seconds markers
const agi::OptionValue *enabled;
/// Enabled option change connection
agi::signal::Connection enabled_opt_changed;
void EnabledOptChanged();
public:
SecondsMarkerProvider();
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void GetMarkers(TimeRange const& range, AudioMarkerVector &out) const override;
};