Amebis/wxWidgets
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
a4945572cac28d920706dba1ae822aa3fc22106d
wxWidgets/src/unix/mediactrl.cpp
Ryan Norton a4945572ca Rework to include gnome preferences. Correct signal methods 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31975 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2005-02-12 23:24:40 +00:00

753 lines
24 KiB
C++
Raw Blame History

/////////////////////////////////////////////////////////////////////////////
// Name: unix/mediactrl.cpp
// Purpose: Built-in Media Backends for Unix
// Author: Ryan Norton <wxprojects@comcast.net>
// Modified by:
// Created: 02/04/05
// RCS-ID: $Id$
// Copyright: (c) 2004-2005 Ryan Norton
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
//===========================================================================
// DECLARATIONS
//===========================================================================
//---------------------------------------------------------------------------
// Pre-compiled header stuff
//---------------------------------------------------------------------------
#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "mediactrl.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
//---------------------------------------------------------------------------
// Includes
//---------------------------------------------------------------------------
#include "wx/mediactrl.h"
//---------------------------------------------------------------------------
// Compilation guard
//---------------------------------------------------------------------------
#if wxUSE_MEDIACTRL
//===========================================================================
// BACKEND DECLARATIONS
//===========================================================================
//---------------------------------------------------------------------------
//
// wxGStreamerMediaBackend
//
//TODO:
//TODO: This is really not the best way to play-stop -
//TODO: it should just have one playbin and stick with it the whole
//TODO: instance of wxGStreamerMediaBackend - but stopping appears
//TODO: to invalidate the playbin object...
//TODO:
//
//---------------------------------------------------------------------------
#if wxUSE_GSTREAMER
//---------------------------------------------------------------------------
// GStreamer Includes
//---------------------------------------------------------------------------
#include <gst/gst.h>
#include <gst/xoverlay/xoverlay.h>
#include <string.h> //strstr
#include "wx/log.h"
#ifdef __WXGTK__
//for <gdk/gdkx.h>/related for GDK_WINDOW_XWINDOW
# include "wx/gtk/win_gtk.h"
# include <gtk/gtksignal.h>
# if wxUSE_DYNLIB_CLASS
# include "wx/dynlib.h"
# endif
//# include <gst/gconf/gconf.h> //gstreamer gnome interface - needs deps
#endif
class WXDLLIMPEXP_MEDIA wxGStreamerMediaBackend : public wxMediaBackend
{
public:
wxGStreamerMediaBackend();
~wxGStreamerMediaBackend();
virtual bool CreateControl(wxControl* ctrl, wxWindow* parent,
wxWindowID id,
const wxPoint& pos,
const wxSize& size,
long style,
const wxValidator& validator,
const wxString& name);
virtual bool Play();
virtual bool Pause();
virtual bool Stop();
virtual bool Load(const wxString& fileName);
virtual bool Load(const wxURI& location);
virtual wxMediaState GetState();
virtual bool SetPosition(wxLongLong where);
virtual wxLongLong GetPosition();
virtual wxLongLong GetDuration();
virtual void Move(int x, int y, int w, int h);
wxSize GetVideoSize() const;
virtual double GetPlaybackRate();
virtual bool SetPlaybackRate(double dRate);
void Cleanup();
static void OnFinish(GstElement *play, gpointer data);
static void OnError (GstElement *play, GstElement *src,
GError *err, gchar *debug,
gpointer data);
static void OnVideoCapsReady(GstPad* pad, GParamSpec* pspec, gpointer data);
static bool TransCapsToVideoSize(wxGStreamerMediaBackend* be, GstPad* caps);
void PostRecalcSize();
#ifdef __WXGTK__
static gint OnGTKRealize(GtkWidget* theWidget, wxGStreamerMediaBackend* be);
#endif
GstElement* m_player; //GStreamer media element
wxSize m_videoSize;
wxControl* m_ctrl;
wxLongLong m_nPausedPos;
DECLARE_DYNAMIC_CLASS(wxGStreamerMediaBackend);
};
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//
// wxGStreamerMediaBackend
//
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
IMPLEMENT_DYNAMIC_CLASS(wxGStreamerMediaBackend, wxMediaBackend);
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend Constructor
//
// Sets m_player to NULL signifying we havn't loaded anything yet
//---------------------------------------------------------------------------
wxGStreamerMediaBackend::wxGStreamerMediaBackend() : m_player(NULL), m_videoSize(0,0)
{
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend Destructor
//
// Stops/cleans up memory
//---------------------------------------------------------------------------
wxGStreamerMediaBackend::~wxGStreamerMediaBackend()
{
Cleanup();
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::OnGTKRealize
//
// If the window wasn't realized when Load was called, this is the
// callback for when it is.
//
// 1) Installs GTK idle handler if it doesn't exist
// 2) Yeilds to avoid an X11 bug (?)
// 3) Tells GStreamer to play the video in our control
//---------------------------------------------------------------------------
#ifdef __WXGTK__
#ifdef __WXDEBUG__
#if wxUSE_THREADS
# define DEBUG_MAIN_THREAD if (wxThread::IsMain() && g_mainThreadLocked) printf("gui reentrance");
#else
# define DEBUG_MAIN_THREAD
#endif
#else
#define DEBUG_MAIN_THREAD
#endif // Debug
extern void wxapp_install_idle_handler();
extern bool g_isIdle;
extern bool g_mainThreadLocked;
gint wxGStreamerMediaBackend::OnGTKRealize(GtkWidget* theWidget,
wxGStreamerMediaBackend* be)
{
DEBUG_MAIN_THREAD
if (g_isIdle)
wxapp_install_idle_handler();
wxYield(); //FIXME: X Server gets an error if I don't do this or a messagebox beforehand?!?!??
GdkWindow *window = GTK_PIZZA(theWidget)->bin_window;
wxASSERT(window);
GstElement* videosink;
g_object_get (G_OBJECT (be->m_player), "video-sink", &videosink, NULL);
GstElement* overlay = gst_bin_get_by_interface (GST_BIN (videosink),
GST_TYPE_X_OVERLAY);
gst_x_overlay_set_xwindow_id( GST_X_OVERLAY(overlay),
GDK_WINDOW_XWINDOW( window )
);
return 0;
}
#endif
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::Cleanup
//
// Frees the gstreamer interfaces if there were any created
//---------------------------------------------------------------------------
void wxGStreamerMediaBackend::Cleanup()
{
if(m_player && GST_IS_OBJECT(m_player))
{
gst_element_set_state (m_player, GST_STATE_NULL);
gst_object_unref (GST_OBJECT (m_player));
}
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::CreateControl
//
// Initializes GStreamer and creates the wx side of our media control
//---------------------------------------------------------------------------
bool wxGStreamerMediaBackend::CreateControl(wxControl* ctrl, wxWindow* parent,
wxWindowID id,
const wxPoint& pos,
const wxSize& size,
long style,
const wxValidator& validator,
const wxString& name)
{
//init gstreamer
gst_init(NULL, NULL);
m_ctrl = ctrl;
return m_ctrl->wxControl::Create(parent, id, pos, size,
style, //remove borders???
validator, name);
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::TransCapsToVideoSize
//
// Gets the size of our video (in wxSize) from a GstPad
//---------------------------------------------------------------------------
bool wxGStreamerMediaBackend::TransCapsToVideoSize(wxGStreamerMediaBackend* be, GstPad* pad)
{
const GstCaps* caps = GST_PAD_CAPS (pad);
if(caps)
{
const GstStructure *s;
s = gst_caps_get_structure (caps, 0);
wxASSERT(s);
gst_structure_get_int (s, "width", &be->m_videoSize.x);
gst_structure_get_int (s, "height", &be->m_videoSize.y);
const GValue *par;
par = gst_structure_get_value (s, "pixel-aspect-ratio");
if (par)
{
int num = gst_value_get_fraction_numerator (par),
den = gst_value_get_fraction_denominator (par);
//TODO: maybe better fraction normalization...
if (num > den)
be->m_videoSize.x = (int) ((float) num * be->m_videoSize.x / den);
else
be->m_videoSize.y = (int) ((float) den * be->m_videoSize.y / num);
}
be->PostRecalcSize();
return true;
}//end if caps
return false;
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::PostRecalcSize
//
// Forces parent to recalc its layout if it has sizers to update
// to the new video size
//---------------------------------------------------------------------------
void wxGStreamerMediaBackend::PostRecalcSize()
{
m_ctrl->InvalidateBestSize();
m_ctrl->GetParent()->Layout();
m_ctrl->GetParent()->Refresh();
m_ctrl->GetParent()->Update();
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::OnFinish
//
// Called by gstreamer when the media is done playing
//
// 1) Send a wxEVT_MEDIA_STOP to the control
// 2) If veteod, break out
// 3) really stop the media
// 4) Send a wxEVT_MEDIA_FINISHED to the control
//---------------------------------------------------------------------------
void wxGStreamerMediaBackend::OnFinish(GstElement *play, gpointer data)
{
wxGStreamerMediaBackend* m_parent = (wxGStreamerMediaBackend*) data;
wxMediaEvent theEvent(wxEVT_MEDIA_STOP,
m_parent->m_ctrl->GetId());
m_parent->m_ctrl->ProcessEvent(theEvent);
if(theEvent.IsAllowed())
{
bool bOk = m_parent->Stop();
wxASSERT(bOk);
//send the event to our child
wxMediaEvent theEvent(wxEVT_MEDIA_FINISHED,
m_parent->m_ctrl->GetId());
m_parent->m_ctrl->ProcessEvent(theEvent);
}
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::OnError
//
// Called by gstreamer when an error is encountered playing the media
//
// TODO: Make this better - maybe some more intelligent wxLog stuff
//---------------------------------------------------------------------------
void wxGStreamerMediaBackend::OnError(GstElement *play,
GstElement *src,
GError *err,
gchar *debug,
gpointer data)
{
wxLogSysError(
wxString::Format(
wxT("Error in wxMediaCtrl!\nError Message:%s\nDebug:%s\n"),
(const wxChar*)wxConvUTF8.cMB2WX(err->message),
(const wxChar*)wxConvUTF8.cMB2WX(debug)
)
);
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::Load (File version)
//
// Just calls the URI version
//---------------------------------------------------------------------------
bool wxGStreamerMediaBackend::Load(const wxString& fileName)
{
return Load(
wxURI(
wxString( wxT("file://") ) + fileName
)
);
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::OnVideoCapsReady
//
// Called by gstreamer when the video caps for the media is ready
//---------------------------------------------------------------------------
void wxGStreamerMediaBackend::OnVideoCapsReady(GstPad* pad, GParamSpec* pspec, gpointer data)
{
wxGStreamerMediaBackend::TransCapsToVideoSize((wxGStreamerMediaBackend*) data, pad);
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::Load (URI version)
//
// 1) Stops/Cleanups the previous instance if there is any
// 2) Creates the gstreamer playbin
// 3) If there is no playbin bail out
// 4) Set up the error and end-of-stream callbacks for our player
// 5) Make our video sink and make sure it supports the x overlay interface
// 6) Make sure the passed URI is valid and tell playbin to load it
// 7) Use the xoverlay extension to tell gstreamer to play in our window
// 8) Get the video size - pause required to set the stream in action
//---------------------------------------------------------------------------
bool wxGStreamerMediaBackend::Load(const wxURI& location)
{
//1
Cleanup();
//2
m_player = gst_element_factory_make ("playbin", "play");
//3
if (!m_player)
return false;
//4
g_signal_connect (m_player, "eos", G_CALLBACK (OnFinish), this);
g_signal_connect (m_player, "error", G_CALLBACK (OnError), this);
//5
GstElement* overlay = NULL;
GstElement* videosink;
#if defined(__WXGTK__) && wxUSE_DYNLIB_CLASS
//use gnome-specific gstreamer extensions
//if synthisis (?) file not found, it
//spits out a warning and uses ximagesink
wxDynamicLibrary gstgconf;
if(gstgconf.Load(gstgconf.CanonicalizeName(wxT("gstgconf-0.8"))))
{
typedef GstElement* (*LPgst_gconf_get_default_video_sink) (void);
LPgst_gconf_get_default_video_sink pGst_gconf_get_default_video_sink =
(LPgst_gconf_get_default_video_sink)
gstgconf.GetSymbol(wxT("gst_gconf_get_default_video_sink"));
if (pGst_gconf_get_default_video_sink)
{
videosink = (*pGst_gconf_get_default_video_sink) ();
wxASSERT( GST_IS_BIN(videosink) );
overlay = gst_bin_get_by_interface (GST_BIN (videosink),
GST_TYPE_X_OVERLAY);
}
gstgconf.Detach();
}
if ( ! GST_IS_X_OVERLAY(overlay) )
{
#endif
videosink = gst_element_factory_make ("xvimagesink", "videosink");
if ( !GST_IS_OBJECT(videosink) )
videosink = gst_element_factory_make ("ximagesink", "videosink");
overlay = videosink;
wxASSERT( GST_IS_X_OVERLAY(overlay) );
if ( ! GST_IS_X_OVERLAY(overlay) )
return false;
#if defined(__WXGTK__) && wxUSE_DYNLIB_CLASS
}
#endif
g_object_set (G_OBJECT (m_player),
"video-sink", videosink,
// "audio-sink", m_audiosink,
NULL);
//6
wxString locstring = location.BuildUnescapedURI();
wxASSERT(gst_uri_protocol_is_valid("file"));
wxASSERT(gst_uri_is_valid(locstring.mb_str()));
g_object_set (G_OBJECT (m_player), "uri", (const char*)locstring.mb_str(), NULL);
//7
#ifdef __WXGTK__
if(!GTK_WIDGET_REALIZED(m_ctrl->m_wxwindow))
{
//Not realized yet - set to connect at realization time
gtk_signal_connect( GTK_OBJECT(m_ctrl->m_wxwindow),
"realize",
GTK_SIGNAL_FUNC(wxGStreamerMediaBackend::OnGTKRealize),
(gpointer) this );
}
else
{
wxYield(); //see realize callback...
GdkWindow *window = GTK_PIZZA(m_ctrl->m_wxwindow)->bin_window;
wxASSERT(window);
#endif
gst_x_overlay_set_xwindow_id( GST_X_OVERLAY(overlay),
#ifdef __WXGTK__
GDK_WINDOW_XWINDOW( window )
#else
ctrl->GetHandle()
#endif
);
#ifdef __WXGTK__
} //end else block
#endif
//8
wxASSERT(gst_element_set_state (m_player,
GST_STATE_PAUSED) == GST_STATE_SUCCESS);
const GList *list = NULL;
g_object_get (G_OBJECT (m_player), "stream-info", &list, NULL);
for ( ; list != NULL; list = list->next)
{
GObject *info = (GObject *) list->data;
gint type;
GParamSpec *pspec;
GEnumValue *val;
GstPad *pad = NULL;
g_object_get (info, "type", &type, NULL);
pspec = g_object_class_find_property (
G_OBJECT_GET_CLASS (info), "type");
val = g_enum_get_value (G_PARAM_SPEC_ENUM (pspec)->enum_class, type);
if (strstr (val->value_name, "VIDEO"))
{
//Newer gstreamer 0.8+ is SUPPOSED to have "object"...
//but a lot of old plugins still use "pad" :)
pspec = g_object_class_find_property (
G_OBJECT_GET_CLASS (info), "object");
if (!pspec)
g_object_get (info, "pad", &pad, NULL);
else
g_object_get (info, "object", &pad, NULL);
pad = (GstPad *) GST_PAD_REALIZE (pad);
wxASSERT(pad);
if(!wxGStreamerMediaBackend::TransCapsToVideoSize(this, pad));
{
//wait for those caps to get ready
g_signal_connect(
pad,
"notify::caps",
G_CALLBACK(wxGStreamerMediaBackend::OnVideoCapsReady),
this);
}
}//end if video
else
{
m_videoSize = wxSize(0,0);
PostRecalcSize();
}
}//end searching through info list
m_nPausedPos = 0;
return true;
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::Play
//
// Sets the stream to a playing state
//---------------------------------------------------------------------------
bool wxGStreamerMediaBackend::Play()
{
if (gst_element_set_state (m_player, GST_STATE_PLAYING)
!= GST_STATE_SUCCESS)
return false;
return true;
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::Pause
//
// Marks where we paused and pauses the stream
//---------------------------------------------------------------------------
bool wxGStreamerMediaBackend::Pause()
{
m_nPausedPos = GetPosition();
if (gst_element_set_state (m_player, GST_STATE_PAUSED)
!= GST_STATE_SUCCESS)
return false;
return true;
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::Stop
//
// Pauses the stream and sets the position to 0
//---------------------------------------------------------------------------
bool wxGStreamerMediaBackend::Stop()
{
if (gst_element_set_state (m_player,
GST_STATE_PAUSED) != GST_STATE_SUCCESS)
return false;
return wxGStreamerMediaBackend::SetPosition(0);
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::GetState
//
// Gets the state of the stream
//---------------------------------------------------------------------------
wxMediaState wxGStreamerMediaBackend::GetState()
{
switch(GST_STATE(m_player))
{
case GST_STATE_PLAYING:
return wxMEDIASTATE_PLAYING;
case GST_STATE_PAUSED:
if (m_nPausedPos == 0)
return wxMEDIASTATE_STOPPED;
else
return wxMEDIASTATE_PAUSED;
default://case GST_STATE_READY:
return wxMEDIASTATE_STOPPED;
}
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::GetPosition
//
// If paused, returns our marked position - otherwise it queries the
// GStreamer playbin for the position and returns that
//
//TODO:
//TODO: In lue of the last big TODO, when you pause and seek gstreamer
//TODO: doesn't update the position sometimes, so we need to keep track of whether
//TODO: we have paused or not and keep track of the time after the pause
//TODO: and whenever the user seeks while paused
//TODO:
//---------------------------------------------------------------------------
wxLongLong wxGStreamerMediaBackend::GetPosition()
{
if(GetState() != wxMEDIASTATE_PLAYING)
return m_nPausedPos;
else
{
gint64 pos;
GstFormat fmtTime = GST_FORMAT_TIME;
if (!gst_element_query (m_player, GST_QUERY_POSITION, &fmtTime, &pos))
return 0;
return pos / GST_MSECOND ;
}
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::SetPosition
//
// Sets the position of the stream
// Note that GST_MSECOND is 1000000 (GStreamer uses nanoseconds - so
// there is 1000000 nanoseconds in a millisecond)
//
// If paused marks where we seeked to
//---------------------------------------------------------------------------
bool wxGStreamerMediaBackend::SetPosition(wxLongLong where)
{
if( gst_element_seek (m_player, (GstSeekType) (GST_SEEK_METHOD_SET |
GST_FORMAT_TIME | GST_SEEK_FLAG_FLUSH),
where.GetValue() * GST_MSECOND ) )
{
if (GetState() != wxMEDIASTATE_PLAYING)
m_nPausedPos = where;
return true;
}
return false;
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::GetDuration
//
// Obtains the total time of our stream
//---------------------------------------------------------------------------
wxLongLong wxGStreamerMediaBackend::GetDuration()
{
gint64 length;
GstFormat fmtTime = GST_FORMAT_TIME;
if(!gst_element_query(m_player, GST_QUERY_TOTAL, &fmtTime, &length))
return 0;
return length / GST_MSECOND ;
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::Move
//
// Called when the window is moved - GStreamer takes care of this
// for us so nothing is needed
//---------------------------------------------------------------------------
void wxGStreamerMediaBackend::Move(int x, int y, int w, int h)
{
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::GetVideoSize
//
// Returns our cached video size from Load/OnVideoCapsReady
//---------------------------------------------------------------------------
wxSize wxGStreamerMediaBackend::GetVideoSize() const
{
return m_videoSize;
}
//---------------------------------------------------------------------------
// wxGStreamerMediaBackend::GetPlaybackRate
// wxGStreamerMediaBackend::SetPlaybackRate
//
// Obtains/Sets the playback rate of the stream
//
//TODO: PlaybackRate not currently supported via playbin directly -
//TODO: Ronald S. Bultje noted on gstreamer-devel:
//TODO:
//TODO: Like "play at twice normal speed"? Or "play at 25 fps and 44,1 kHz"? As
//TODO: for the first, yes, we have elements for that, btu they"re not part of
//TODO: playbin. You can create a bin (with a ghost pad) containing the actual
//TODO: video/audiosink and the speed-changing element for this, and set that
//TODO: element as video-sink or audio-sink property in playbin. The
//TODO: audio-element is called "speed", the video-element is called "videodrop"
//TODO: (although that appears to be deprecated in favour of "videorate", which
//TODO: again cannot do this, so this may not work at all in the end). For
//TODO: forcing frame/samplerates, see audioscale and videorate. Audioscale is
//TODO: part of playbin.
//---------------------------------------------------------------------------
double wxGStreamerMediaBackend::GetPlaybackRate()
{
//not currently supported via playbin
return 1.0;
}
bool wxGStreamerMediaBackend::SetPlaybackRate(double dRate)
{
//not currently supported via playbin
return false;
}
#endif //wxUSE_GSTREAMER
//in source file that contains stuff you don't directly use
#include <wx/html/forcelnk.h>
FORCE_LINK_ME(basewxmediabackends);
#endif //wxUSE_MEDIACTRL
Reference in New Issue View Git Blame Copy Permalink