X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ddc90a8d52e91ca4b6a2d7643824aede1395067c..8981608c698da2cb217b6cdeffad77011a99bf7c:/src/unix/mediactrl.cpp diff --git a/src/unix/mediactrl.cpp b/src/unix/mediactrl.cpp index 838775b45c..3edabd669f 100644 --- a/src/unix/mediactrl.cpp +++ b/src/unix/mediactrl.cpp @@ -1,6 +1,6 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: mac/carbon/mediactrl.cpp -// Purpose: Built-in Media Backends for Unix (stub) +// Name: src/unix/mediactrl.cpp +// Purpose: GStreamer backend for Unix // Author: Ryan Norton // Modified by: // Created: 02/04/05 @@ -9,42 +9,1594 @@ // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -//=========================================================================== -// DECLARATIONS -//=========================================================================== +// For compilers that support precompilation, includes "wx.h". +#include "wx/wxprec.h" + +#include "wx/mediactrl.h" + +#if wxUSE_MEDIACTRL -//--------------------------------------------------------------------------- -// Pre-compiled header stuff -//--------------------------------------------------------------------------- +#if wxUSE_GSTREAMER -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) -#pragma implementation "mediactrl.h" +#include // main gstreamer header + +// xoverlay/video stuff, gst-gconf for 0.8 +#if GST_VERSION_MAJOR > 0 || GST_VERSION_MINOR >= 10 +# include +#else +# include +# include // gstreamer glib configuration #endif -// For compilers that support precompilation, includes "wx.h". -#include "wx/wxprec.h" +#include "wx/log.h" // wxLogDebug/wxLogSysError/wxLogTrace +#include "wx/app.h" // wxTheApp->argc, wxTheApp->argv +#include "wx/thread.h" // wxMutex/wxMutexLocker +#include "wx/timer.h" // wxTimer -#ifdef __BORLANDC__ -#pragma hdrstop +#ifdef __WXGTK__ +# include "wx/gtk/win_gtk.h" // for /GDK_WINDOW_XWINDOW #endif -//--------------------------------------------------------------------------- -// Includes -//--------------------------------------------------------------------------- -#include "wx/mediactrl.h" +//----------------------------------------------------------------------------- +// Discussion of internals +//----------------------------------------------------------------------------- -//--------------------------------------------------------------------------- -// Compilation guard -//--------------------------------------------------------------------------- -#if wxUSE_MEDIACTRL +/* + This is the GStreamer backend for unix. Currently we require 0.8 or + 0.10. Here we use the "playbin" GstElement for ease of use. -//in source file that contains stuff you don't directly use -#include -FORCE_LINK_ME(basewxmediabackends); + Note that now we compare state change functions to GST_STATE_FAILURE + now rather than GST_STATE_SUCCESS as newer gstreamer versions return + non-success values for returns that are otherwise successful but not + immediate. -#endif //wxUSE_MEDIACTRL + Also this probably doesn't work with anything other than wxGTK at the + moment but with a tad bit of work it could theorectically work in + straight wxX11 et al. + + One last note is that resuming from pausing/seeking can result + in erratic video playback (GStreamer-based bug, happens in totem as well) + - this is better in 0.10, however. One thing that might make it worse + here is that we don't preserve the aspect ratio of the video and stretch + it to the whole window. + + Note that there are some things used here that could be undocumented - + for reference see the media player Kiss and Totem as well as some + other sources. There was a backend for a kde media player as well + that attempted thread-safety... + + Then there is the issue of m_asynclock. This serves several purposes: + 1) It prevents the C callbacks from sending wx state change events + so that we don't get duplicate ones in 0.8 + 2) It makes the sync and async handlers in 0.10 not drop any + messages so that while we are polling it we get the messages in + SyncStateChange instead of the queue. + 3) Keeps the pausing in Stop() synchronous + + RN: Note that I've tried to follow the wxGTK conventions here as close + as possible. In the implementation the C Callbacks come first, then + the internal functions, then the public ones. Set your vi to 80 + characters people :). +*/ + +//============================================================================= +// Declarations +//============================================================================= + +//----------------------------------------------------------------------------- +// GStreamer (most version compatability) macros +//----------------------------------------------------------------------------- + +// In 0.9 there was a HUGE change to GstQuery and the +// gst_element_query function changed dramatically and split off +// into two seperate ones +#if GST_VERSION_MAJOR == 0 && GST_VERSION_MINOR <= 8 +# define wxGst_element_query_duration(e, f, p) \ + gst_element_query(e, GST_QUERY_TOTAL, f, p) +# define wxGst_element_query_position(e, f, p) \ + gst_element_query(e, GST_QUERY_POSITION, f, p) +#elif GST_VERSION_MAJOR == 0 && GST_VERSION_MINOR == 9 +// However, the actual 0.9 version has a slightly different definition +// and instead of gst_element_query_duration it has two parameters to +// gst_element_query_position instead +# define wxGst_element_query_duration(e, f, p) \ + gst_element_query_position(e, f, 0, p) +# define wxGst_element_query_position(e, f, p) \ + gst_element_query_position(e, f, p, 0) +#else +# define wxGst_element_query_duration \ + gst_element_query_duration +# define wxGst_element_query_position \ + gst_element_query_position +#endif + +// Other 0.10 macros +#if GST_VERSION_MAJOR > 0 || GST_VERSION_MINOR >= 10 +# define GST_STATE_FAILURE GST_STATE_CHANGE_FAILURE +# define GST_STATE_SUCCESS GST_STATE_CHANGE_SUCCESS +# define GstElementState GstState +# define gst_gconf_get_default_video_sink() \ + gst_element_factory_make ("gconfvideosink", "video-sink"); +# define gst_gconf_get_default_audio_sink() \ + gst_element_factory_make ("gconfaudiosink", "audio-sink"); +#endif + +// Max wait time for element state waiting - GST_CLOCK_TIME_NONE for inf +#define wxGSTREAMER_TIMEOUT (100 * GST_MSECOND) // Max 100 milliseconds + +//----------------------------------------------------------------------------- +// wxGTK Debugging and idle stuff +//----------------------------------------------------------------------------- +#ifdef __WXGTK__ + +# ifdef __WXDEBUG__ +# if wxUSE_THREADS +# define DEBUG_MAIN_THREAD \ + if (wxThread::IsMain() && g_mainThreadLocked) \ + wxPrintf(wxT("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; +#endif // wxGTK + +//----------------------------------------------------------------------------- +// wxLogTrace mask string +//----------------------------------------------------------------------------- +#define wxTRACE_GStreamer wxT("GStreamer") + +//----------------------------------------------------------------------------- +// +// wxGStreamerMediaBackend +// +//----------------------------------------------------------------------------- +class WXDLLIMPEXP_MEDIA + wxGStreamerMediaBackend : public wxMediaBackendCommonBase +{ +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); + + virtual wxLongLong GetDownloadProgress(); + virtual wxLongLong GetDownloadTotal(); + + virtual bool SetVolume(double dVolume); + virtual double GetVolume(); + + //------------implementation from now on----------------------------------- + bool DoLoad(const wxString& locstring); + wxMediaCtrl* GetControl() { return m_ctrl; } // for C Callbacks + void HandleStateChange(GstElementState oldstate, GstElementState newstate); + bool QueryVideoSizeFromElement(GstElement* element); + bool QueryVideoSizeFromPad(GstPad* caps); + void SetupXOverlay(); + bool SyncStateChange(GstElement* element, GstElementState state, + gint64 llTimeout = wxGSTREAMER_TIMEOUT); + bool TryAudioSink(GstElement* audiosink); + bool TryVideoSink(GstElement* videosink); + + GstElement* m_playbin; // GStreamer media element + wxSize m_videoSize; // Cached actual video size + double m_dRate; // Current playback rate - + // see GetPlaybackRate for notes + wxLongLong m_llPausedPos; // Paused position - see Pause() + GstXOverlay* m_xoverlay; // X Overlay that contains the GST video + wxMutex m_asynclock; // See "discussion of internals" + class wxGStreamerMediaEventHandler* m_eventHandler; // see below + + friend class wxGStreamerMediaEventHandler; + friend class wxGStreamerLoadWaitTimer; + DECLARE_DYNAMIC_CLASS(wxGStreamerMediaBackend); +}; + +//----------------------------------------------------------------------------- +// wxGStreamerMediaEventHandler +// +// OK, this will take an explanation - basically gstreamer callbacks +// are issued in a seperate thread, and in this thread we may not set +// the state of the playbin, so we need to send a wx event in that +// callback so that we set the state of the media and other stuff +// like GUI calls. +//----------------------------------------------------------------------------- +class wxGStreamerMediaEventHandler : public wxEvtHandler +{ + public: + wxGStreamerMediaEventHandler(wxGStreamerMediaBackend* be) : m_be(be) + { + this->Connect(wxID_ANY, wxEVT_MEDIA_FINISHED, + wxMediaEventHandler(wxGStreamerMediaEventHandler::OnMediaFinish)); + } + + void OnMediaFinish(wxMediaEvent& event); + + wxGStreamerMediaBackend* m_be; +}; + +//============================================================================= +// Implementation +//============================================================================= + +IMPLEMENT_DYNAMIC_CLASS(wxGStreamerMediaBackend, wxMediaBackend) + +//----------------------------------------------------------------------------- +// +// C Callbacks +// +//----------------------------------------------------------------------------- + +//----------------------------------------------------------------------------- +// "expose_event" from m_ctrl->m_wxwindow +// +// Handle GTK expose event from our window - here we hopefully +// redraw the video in the case of pausing and other instances... +// (Returns TRUE to pass to other handlers, FALSE if not) +// +// TODO: Do a DEBUG_MAIN_THREAD/install_idle_handler here? +//----------------------------------------------------------------------------- +#ifdef __WXGTK__ +extern "C" { +static gboolean gtk_window_expose_callback(GtkWidget *widget, + GdkEventExpose *event, + wxGStreamerMediaBackend *be) +{ + if(event->count > 0) + return FALSE; + + GdkWindow *window = GTK_PIZZA(be->GetControl()->m_wxwindow)->bin_window; + + // I've seen this reccommended somewhere... + // TODO: Is this needed? Maybe it is just cruft... + // gst_x_overlay_set_xwindow_id( GST_X_OVERLAY(be->m_xoverlay), + // GDK_WINDOW_XWINDOW( window ) ); + + // If we have actual video..... + if(!(be->m_videoSize.x==0&&be->m_videoSize.y==0) && + GST_STATE(be->m_playbin) >= GST_STATE_PAUSED) + { + // GST Doesn't redraw automatically while paused + // Plus, the video sometimes doesn't redraw when it looses focus + // or is painted over so we just tell it to redraw... + gst_x_overlay_expose(be->m_xoverlay); + } + else + { + // draw a black background like some other backends do.... + gdk_draw_rectangle (window, widget->style->black_gc, TRUE, 0, 0, + widget->allocation.width, + widget->allocation.height); + } + + return FALSE; +} +} +#endif // wxGTK + +//----------------------------------------------------------------------------- +// "realize" from m_ctrl->m_wxwindow +// +// If the window wasn't realized when Load was called, this is the +// callback for when it is - the purpose of which is to tell +// GStreamer to play the video in our control +//----------------------------------------------------------------------------- +#ifdef __WXGTK__ +extern "C" { +static gint gtk_window_realize_callback(GtkWidget* theWidget, + wxGStreamerMediaBackend* be) +{ + DEBUG_MAIN_THREAD // TODO: Is this neccessary? + + if (g_isIdle) // FIXME: Why is needed? For wxYield? ?? + wxapp_install_idle_handler(); + + wxYield(); // FIXME: RN: X Server gets an error/crash if I don't do + // this or a messagebox beforehand?!?!?? + + GdkWindow *window = GTK_PIZZA(theWidget)->bin_window; + wxASSERT(window); + + gst_x_overlay_set_xwindow_id( GST_X_OVERLAY(be->m_xoverlay), + GDK_WINDOW_XWINDOW( window ) + ); + g_signal_connect (be->GetControl()->m_wxwindow, + "expose_event", + G_CALLBACK(gtk_window_expose_callback), be); + return 0; +} +} +#endif // wxGTK + +//----------------------------------------------------------------------------- +// "state-change" from m_playbin/GST_MESSAGE_STATE_CHANGE +// +// Called by gstreamer when the state changes - here we +// send the appropriate corresponding wx event. +// +// 0.8 only as HandleStateChange does this in both versions +//----------------------------------------------------------------------------- +#if GST_VERSION_MAJOR == 0 && GST_VERSION_MINOR < 10 +extern "C" { +static void gst_state_change_callback(GstElement *play, + GstElementState oldstate, + GstElementState newstate, + wxGStreamerMediaBackend* be) +{ + if(be->m_asynclock.TryLock() == wxMUTEX_NO_ERROR) + { + be->HandleStateChange(oldstate, newstate); + be->m_asynclock.Unlock(); + } +} +} +#endif // <0.10 + +//----------------------------------------------------------------------------- +// "eos" from m_playbin/GST_MESSAGE_EOS +// +// Called by gstreamer when the media is done playing ("end of stream") +//----------------------------------------------------------------------------- +extern "C" { +static void gst_finish_callback(GstElement *play, + wxGStreamerMediaBackend* be) +{ + wxLogTrace(wxTRACE_GStreamer, wxT("gst_finish_callback")); + wxMediaEvent event(wxEVT_MEDIA_FINISHED); + be->m_eventHandler->AddPendingEvent(event); +} +} + +//----------------------------------------------------------------------------- +// "error" from m_playbin/GST_MESSAGE_ERROR +// +// Called by gstreamer when an error is encountered playing the media - +// We call wxLogTrace in addition wxLogSysError so that we can get it +// on the command line as well for those who want extra traces. +//----------------------------------------------------------------------------- +extern "C" { +static void gst_error_callback(GstElement *play, + GstElement *src, + GError *err, + gchar *debug, + wxGStreamerMediaBackend* be) +{ + wxString sError; + sError.Printf(wxT("gst_error_callback\n") + wxT("Error Message:%s\nDebug:%s\n"), + (const wxChar*)wxConvUTF8.cMB2WX(err->message), + (const wxChar*)wxConvUTF8.cMB2WX(debug)); + wxLogTrace(wxTRACE_GStreamer, sError); + wxLogSysError(sError); +} +} + +//----------------------------------------------------------------------------- +// "notify::caps" from the videopad inside "stream-info" of m_playbin +// +// Called by gstreamer when the video caps for the media is ready - currently +// we use the caps to get the natural size of the video +// +// (Undocumented?) +//----------------------------------------------------------------------------- +extern "C" { +static void gst_notify_caps_callback(GstPad* pad, + GParamSpec* pspec, + wxGStreamerMediaBackend* be) +{ + wxLogTrace(wxTRACE_GStreamer, wxT("gst_notify_caps_callback")); + be->QueryVideoSizeFromPad(pad); +} +} + +//----------------------------------------------------------------------------- +// "notify::stream-info" from m_playbin +// +// Run through the stuff in "stream-info" of m_playbin for a valid +// video pad, and then attempt to query the video size from it - if not +// set up an event to do so when ready. +// +// Currently unused - now we just query it directly using +// QueryVideoSizeFromElement. +// +// (Undocumented?) +//----------------------------------------------------------------------------- +#if GST_VERSION_MAJOR > 0 || GST_VERSION_MINOR >= 10 +extern "C" { +static void gst_notify_stream_info_callback(GstElement* element, + GParamSpec* pspec, + wxGStreamerMediaBackend* be) +{ + wxLogTrace(wxTRACE_GStreamer, wxT("gst_notify_stream_info_callback")); + be->QueryVideoSizeFromElement(be->m_playbin); +} +} +#endif + +//----------------------------------------------------------------------------- +// "desired-size-changed" from m_xoverlay +// +// 0.8-specific this provides us with the video size when it changes - +// even though we get the caps as well this seems to come before the +// caps notification does... +// +// Note it will return 16,16 for an early-bird value or for audio +//----------------------------------------------------------------------------- +#if GST_VERSION_MAJOR == 0 && GST_VERSION_MINOR < 10 +extern "C" { +static void gst_desired_size_changed_callback(GstElement * play, + guint width, guint height, + wxGStreamerMediaBackend* be) +{ + if(!(width == 16 && height == 16)) + { + be->m_videoSize.x = width; + be->m_videoSize.y = height; + } + else + be->QueryVideoSizeFromElement(be->m_playbin); +} +} +#endif + +//----------------------------------------------------------------------------- +// gst_bus_async_callback [static] +// gst_bus_sync_callback [static] +// +// Called by m_playbin for notifications such as end-of-stream in 0.10 - +// in previous versions g_signal notifications were used. Because everything +// in centered in one switch statement though it reminds one of old WinAPI +// stuff. +// +// gst_bus_sync_callback is that sync version that is called on the main GUI +// thread before the async version that we use to set the xwindow id of the +// XOverlay (NB: This isn't currently used - see CreateControl()). +//----------------------------------------------------------------------------- +#if GST_VERSION_MAJOR > 0 || GST_VERSION_MINOR >= 10 +extern "C" { +static gboolean gst_bus_async_callback(GstBus* bus, + GstMessage* message, + wxGStreamerMediaBackend* be) +{ + if(((GstElement*)GST_MESSAGE_SRC(message)) != be->m_playbin) + return TRUE; + if(be->m_asynclock.TryLock() != wxMUTEX_NO_ERROR) + return TRUE; + + switch(GST_MESSAGE_TYPE(message)) + { + case GST_MESSAGE_STATE_CHANGED: + { + GstState oldstate, newstate, pendingstate; + gst_message_parse_state_changed(message, &oldstate, + &newstate, &pendingstate); + be->HandleStateChange(oldstate, newstate); + break; + } + case GST_MESSAGE_EOS: + { + gst_finish_callback(NULL, be); + break; + } + case GST_MESSAGE_ERROR: + { + GError* error; + gchar* debug; + gst_message_parse_error(message, &error, &debug); + gst_error_callback(NULL, NULL, error, debug, be); + break; + } + default: + break; + } + + be->m_asynclock.Unlock(); + return FALSE; // remove the message from Z queue +} + +static GstBusSyncReply gst_bus_sync_callback(GstBus* bus, + GstMessage* message, + wxGStreamerMediaBackend* be) +{ + // Pass a non-xwindowid-setting event on to the async handler where it + // belongs + if (GST_MESSAGE_TYPE (message) != GST_MESSAGE_ELEMENT || + !gst_structure_has_name (message->structure, "prepare-xwindow-id")) + { + // + // NB: Unfortunately, the async callback can be quite + // buggy at times and often doesn't get called at all, + // so here we are processing it right here in the calling + // thread instead of the GUI one... + // + if(gst_bus_async_callback(bus, message, be)) + return GST_BUS_PASS; + else + return GST_BUS_DROP; + } + + wxLogTrace(wxTRACE_GStreamer, wxT("Got prepare-xwindow-id")); + be->SetupXOverlay(); + return GST_BUS_DROP; // We handled this message - drop from the queue +} +} +#endif + +//----------------------------------------------------------------------------- +// +// Private (although not in the C++ sense) methods +// +//----------------------------------------------------------------------------- + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::HandleStateChange +// +// Handles a state change event from our C Callback for "state-change" or +// the async queue in 0.10. (Mostly this is here to avoid locking the +// the mutex twice...) +//----------------------------------------------------------------------------- +void wxGStreamerMediaBackend::HandleStateChange(GstElementState oldstate, + GstElementState newstate) +{ + switch(newstate) + { + case GST_STATE_PLAYING: + wxLogTrace(wxTRACE_GStreamer, wxT("Play event")); + QueuePlayEvent(); + break; + case GST_STATE_PAUSED: + // For some reason .10 sends a lot of oldstate == newstate + // messages - most likely for pending ones - also + // !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 (!strncasecmp(val->value_name, "video", 5) || + !strncmp(val->value_name, "GST_STREAM_TYPE_VIDEO", 21)) + { + // Newer gstreamer 0.8+ plugins are 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); + +#if GST_VERSION_MAJOR == 0 && GST_VERSION_MINOR <= 8 + // Killed in 0.9, presumely because events and such + // should be pushed on pads regardless of whether they + // are currently linked + pad = (GstPad *) GST_PAD_REALIZE (pad); + wxASSERT(pad); +#endif + + if(!QueryVideoSizeFromPad(pad)) + { + // wait for those caps to get ready + g_signal_connect( + pad, + "notify::caps", + G_CALLBACK(gst_notify_caps_callback), + this); + } + break; + }// end if video + }// end searching through info list + + // no video (or extremely delayed stream-info) + if(list == NULL) + { + m_videoSize = wxSize(0,0); + return false; + } + + return true; +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::QueryVideoSizeFromPad +// +// Gets the size of our video (in wxSize) from a GstPad +//----------------------------------------------------------------------------- +bool wxGStreamerMediaBackend::QueryVideoSizeFromPad(GstPad* pad) +{ + const GstCaps* caps = GST_PAD_CAPS(pad); + if ( caps ) + { + const GstStructure *s = gst_caps_get_structure (caps, 0); + wxASSERT(s); + + gst_structure_get_int (s, "width", &m_videoSize.x); + gst_structure_get_int (s, "height", &m_videoSize.y); + + const GValue *par; + par = gst_structure_get_value (s, "pixel-aspect-ratio"); + + if (par) + { + wxLogTrace(wxTRACE_GStreamer, + wxT("pixel-aspect-ratio found in pad")); + int num = par->data[0].v_int, + den = par->data[1].v_int; + + // TODO: maybe better fraction normalization... + if (num > den) + m_videoSize.x = (int) ((float) num * m_videoSize.x / den); + else + m_videoSize.y = (int) ((float) den * m_videoSize.y / num); + } + + wxLogTrace(wxTRACE_GStreamer, wxT("Adjusted video size: [%i,%i]"), + m_videoSize.x, m_videoSize.y); + return true; + } // end if caps + + return false; // not ready/massive failure +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::SetupXOverlay +// +// Attempts to set the XWindow id of our GstXOverlay to tell it which +// window to play video in. +//----------------------------------------------------------------------------- +void wxGStreamerMediaBackend::SetupXOverlay() +{ + // Use the xoverlay extension to tell gstreamer to play in our window +#ifdef __WXGTK__ + if(!GTK_WIDGET_REALIZED(m_ctrl->m_wxwindow)) + { + // Not realized yet - set to connect at realization time + g_signal_connect (m_ctrl->m_wxwindow, + "realize", + G_CALLBACK (gtk_window_realize_callback), + 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(m_xoverlay), +#ifdef __WXGTK__ + GDK_WINDOW_XWINDOW( window ) +#else + ctrl->GetHandle() +#endif + ); + +#ifdef __WXGTK__ + g_signal_connect (m_ctrl->m_wxwindow, + // m_ctrl->m_wxwindow/*m_ctrl->m_widget*/, + "expose_event", + G_CALLBACK(gtk_window_expose_callback), this); + } // end if GtkPizza realized +#endif +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::SyncStateChange +// +// This function is rather complex - basically the idea is that we +// poll the GstBus of m_playbin until it has reached desiredstate, an error +// is reached, or there are no more messages left in the GstBus queue. +// +// Returns true if there are no messages left in the queue or +// the current state reaches the disired state. +// +// PRECONDITION: Assumes m_asynclock is Lock()ed +//----------------------------------------------------------------------------- +#if GST_VERSION_MAJOR > 0 || GST_VERSION_MINOR >= 10 +bool wxGStreamerMediaBackend::SyncStateChange(GstElement* element, + GstElementState desiredstate, + gint64 llTimeout) +{ + GstBus* bus = gst_element_get_bus(element); + GstMessage* message; + bool bBreak = false, + bSuccess = false; + gint64 llTimeWaited = 0; + + do + { +#if 1 + // NB: The GStreamer gst_bus_poll is unfortunately broken and + // throws silly critical internal errors (for instance + // "message != NULL" when the whole point of it is to + // poll for the message in the first place!) so we implement + // our own "waiting mechinism" + if(gst_bus_have_pending(bus) == FALSE) + { + if(llTimeWaited >= llTimeout) + return true; // Reached timeout... assume success + llTimeWaited += 10*GST_MSECOND; + wxMilliSleep(10); + continue; + } + + message = gst_bus_pop(bus); +#else + message = gst_bus_poll(bus, (GstMessageType) + (GST_MESSAGE_STATE_CHANGED | + GST_MESSAGE_ERROR | + GST_MESSAGE_EOS), llTimeout); + if(!message) + return true; +#endif + if(((GstElement*)GST_MESSAGE_SRC(message)) == element) + { + switch(GST_MESSAGE_TYPE(message)) + { + case GST_MESSAGE_STATE_CHANGED: + { + GstState oldstate, newstate, pendingstate; + gst_message_parse_state_changed(message, &oldstate, + &newstate, &pendingstate); + if(newstate == desiredstate) + { + bSuccess = bBreak = true; + } + break; + } + case GST_MESSAGE_ERROR: + { + GError* error; + gchar* debug; + gst_message_parse_error(message, &error, &debug); + gst_error_callback(NULL, NULL, error, debug, this); + bBreak = true; + break; + } + case GST_MESSAGE_EOS: + wxLogSysError(wxT("Reached end of stream prematurely")); + bBreak = true; + break; + default: + break; // not handled + } + } + + gst_message_unref(message); + }while(!bBreak); + + return bSuccess; +} +#else // 0.8 implementation +bool wxGStreamerMediaBackend::SyncStateChange(GstElement* element, + GstElementState desiredstate, + gint64 llTimeout) +{ + gint64 llTimeWaited = 0; + while(GST_STATE(element) != desiredstate) + { + if(llTimeWaited >= llTimeout) + break; + llTimeWaited += 10*GST_MSECOND; + wxMilliSleep(10); + } + + return llTimeWaited != llTimeout; +} +#endif + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::TryAudioSink +// wxGStreamerMediaBackend::TryVideoSink +// +// Uses various means to determine whether a passed in video/audio sink +// if suitable for us - if it is not we return false and unref the +// inappropriate sink. +//----------------------------------------------------------------------------- +bool wxGStreamerMediaBackend::TryAudioSink(GstElement* audiosink) +{ + if( !GST_IS_ELEMENT(audiosink) ) + { + if(G_IS_OBJECT(audiosink)) + g_object_unref(audiosink); + return false; + } + + return true; +} + +bool wxGStreamerMediaBackend::TryVideoSink(GstElement* videosink) +{ + // Check if the video sink either is an xoverlay or might contain one... + if( !GST_IS_BIN(videosink) && !GST_IS_X_OVERLAY(videosink) ) + { + if(G_IS_OBJECT(videosink)) + g_object_unref(videosink); + return false; + } + + // Make our video sink and make sure it supports the x overlay interface + // the x overlay enables us to put the video in our control window + // (i.e. we NEED it!) - also connect to the natural video size change event + if( GST_IS_BIN(videosink) ) + m_xoverlay = (GstXOverlay*) + gst_bin_get_by_interface (GST_BIN (videosink), + GST_TYPE_X_OVERLAY); + else + m_xoverlay = (GstXOverlay*) videosink; + + if ( !GST_IS_X_OVERLAY(m_xoverlay) ) + { + g_object_unref(videosink); + return false; + } + + return true; +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaEventHandler::OnMediaFinish +// +// Called when the media is about to stop +//----------------------------------------------------------------------------- +void wxGStreamerMediaEventHandler::OnMediaFinish(wxMediaEvent& event) +{ + // (RN - I have no idea why I thought this was good behaviour.... + // maybe it made sense for streaming/nonseeking data but + // generally it seems like a really bad idea) - + if(m_be->SendStopEvent()) + { + // Stop the media (we need to set it back to paused + // so that people can get the duration et al. + // and send the finish event (luckily we can "Sync" it out... LOL!) + // (We don't check return values here because we can't really do + // anything...) + wxMutexLocker lock(m_be->m_asynclock); + + // Set element to ready+sync it + gst_element_set_state (m_be->m_playbin, GST_STATE_READY); + m_be->SyncStateChange(m_be->m_playbin, GST_STATE_READY); + + // Now set it to paused + update pause pos to 0 and + // Sync that as well (note that we don't call Stop() here + // due to mutex issues) + gst_element_set_state (m_be->m_playbin, GST_STATE_PAUSED); + m_be->SyncStateChange(m_be->m_playbin, GST_STATE_PAUSED); + m_be->m_llPausedPos = 0; + + // Finally, queue the finish event + m_be->QueueFinishEvent(); + } +} + +//----------------------------------------------------------------------------- +// +// Public methods +// +//----------------------------------------------------------------------------- + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend Constructor +// +// Sets m_playbin to NULL signifying we havn't loaded anything yet +//----------------------------------------------------------------------------- +wxGStreamerMediaBackend::wxGStreamerMediaBackend() + : m_playbin(NULL) +{ +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend Destructor +// +// Stops/cleans up memory +// +// NB: This could trigger a critical warning but doing a SyncStateChange +// here is just going to slow down quitting of the app, which is bad. +//----------------------------------------------------------------------------- +wxGStreamerMediaBackend::~wxGStreamerMediaBackend() +{ + // Dispose of the main player and related objects + if(m_playbin) + { + wxASSERT( GST_IS_OBJECT(m_playbin) ); + gst_element_set_state (m_playbin, GST_STATE_NULL); + gst_object_unref (GST_OBJECT (m_playbin)); + delete m_eventHandler; + } +} +//----------------------------------------------------------------------------- +// 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 + // + //Convert arguments to unicode if enabled +#if wxUSE_UNICODE + int i; + char **argvGST = new char*[wxTheApp->argc + 1]; + for ( i = 0; i < wxTheApp->argc; i++ ) + { + argvGST[i] = wxStrdupA(wxConvUTF8.cWX2MB(wxTheApp->argv[i])); + } + argvGST[wxTheApp->argc] = NULL; + int argcGST = wxTheApp->argc; +#else +#define argcGST wxTheApp->argc +#define argvGST wxTheApp->argv +#endif + + //Really init gstreamer + gboolean bInited; + GError* error = NULL; +#if GST_VERSION_MAJOR > 0 || GST_VERSION_MINOR >= 10 + bInited = gst_init_check(&argcGST, &argvGST, &error); +#else + bInited = gst_init_check(&argcGST, &argvGST); +#endif + + // Cleanup arguments for unicode case +#if wxUSE_UNICODE + for ( i = 0; i < argcGST; i++ ) + { + free(argvGST[i]); + } + + delete [] argvGST; +#endif + + if(!bInited) //gst_init_check fail? + { + if(error) + { + wxLogSysError(wxT("Could not initialize GStreamer\n") + wxT("Error Message:%s"), + (const wxChar*) wxConvUTF8.cMB2WX(error->message) + ); + g_error_free(error); + } + else + wxLogSysError(wxT("Could not initialize GStreamer")); + + return false; + } + + // + // wxControl creation + // + m_ctrl = wxStaticCast(ctrl, wxMediaCtrl); + +#ifdef __WXGTK__ + // We handle our own GTK expose events + m_ctrl->m_noExpose = TRUE; +#endif + + if( !m_ctrl->wxControl::Create(parent, id, pos, size, + style, // TODO: remove borders??? + validator, name) ) + { + wxFAIL_MSG(wxT("Could not create wxControl!!!")); + return false; + } + +#ifdef __WXGTK__ + // Turn off double-buffering so that + // so it doesn't draw over the video and cause sporadic + // disappearances of the video + gtk_widget_set_double_buffered(m_ctrl->m_wxwindow, FALSE); + + // Tell GtkPizza not to clear the background + gtk_pizza_set_clear(GTK_PIZZA(m_ctrl->m_wxwindow), FALSE); +#endif + + // don't erase the background of our control window + // so that resizing is a bit smoother + m_ctrl->SetBackgroundStyle(wxBG_STYLE_CUSTOM); + + // Create our playbin object + m_playbin = gst_element_factory_make ("playbin", "play"); + if (!GST_IS_ELEMENT(m_playbin)) + { + if(G_IS_OBJECT(m_playbin)) + g_object_unref(m_playbin); + wxLogSysError(wxT("Got an invalid playbin")); + return false; + } + +#if GST_VERSION_MAJOR == 0 && GST_VERSION_MINOR < 10 + // Connect the glib events/callbacks we want to our playbin + g_signal_connect(m_playbin, "eos", + G_CALLBACK(gst_finish_callback), this); + g_signal_connect(m_playbin, "error", + G_CALLBACK(gst_error_callback), this); + g_signal_connect(m_playbin, "state-change", + G_CALLBACK(gst_state_change_callback), this); +#else + // GStreamer 0.10+ uses GstBus for this now, connect to the sync + // handler as well so we can set the X window id of our xoverlay + gst_bus_add_watch (gst_element_get_bus(m_playbin), + (GstBusFunc) gst_bus_async_callback, this); + gst_bus_set_sync_handler(gst_element_get_bus(m_playbin), + (GstBusSyncHandler) gst_bus_sync_callback, this); + g_signal_connect(m_playbin, "notify::stream-info", + G_CALLBACK(gst_notify_stream_info_callback), this); +#endif + + // Get the audio sink + GstElement* audiosink = gst_gconf_get_default_audio_sink(); + if( !TryAudioSink(audiosink) ) + { + // fallback to autodetection, then alsa, then oss as a stopgap + audiosink = gst_element_factory_make ("autoaudiosink", "audio-sink"); + if( !TryAudioSink(audiosink) ) + { + audiosink = gst_element_factory_make ("alsasink", "alsa-output"); + if( !TryAudioSink(audiosink) ) + { + audiosink = gst_element_factory_make ("osssink", "play_audio"); + if( !TryAudioSink(audiosink) ) + { + wxLogSysError(wxT("Could not find a valid audiosink")); + return false; + } + } + } + } + + // Setup video sink - first try gconf, then auto, then xvimage and + // then finally plain ximage + GstElement* videosink = gst_gconf_get_default_video_sink(); + if( !TryVideoSink(videosink) ) + { + videosink = gst_element_factory_make ("autovideosink", "video-sink"); + if( !TryVideoSink(videosink) ) + { + videosink = gst_element_factory_make ("xvimagesink", "video-sink"); + if( !TryVideoSink(videosink) ) + { + // finally, do a final fallback to ximagesink + videosink = + gst_element_factory_make ("ximagesink", "video-sink"); + if( !TryVideoSink(videosink) ) + { + g_object_unref(audiosink); + wxLogSysError(wxT("Could not find a suitable video sink")); + return false; + } + } + } + } + +#if GST_VERSION_MAJOR == 0 && GST_VERSION_MINOR < 10 + // Not on 0.10... called when video size changes + g_signal_connect(m_xoverlay, "desired-size-changed", + G_CALLBACK(gst_desired_size_changed_callback), this); +#endif + // Tell GStreamer which window to draw to in 0.8 - 0.10 + // sometimes needs this too... + SetupXOverlay(); + // Now that we know (or, rather think) our video and audio sink + // are valid set our playbin to use them + g_object_set (G_OBJECT (m_playbin), + "video-sink", videosink, + "audio-sink", audiosink, + NULL); + + m_eventHandler = new wxGStreamerMediaEventHandler(this); + return true; +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::Load (File version) +// +// Just calls DoLoad() with a prepended file scheme +//----------------------------------------------------------------------------- +bool wxGStreamerMediaBackend::Load(const wxString& fileName) +{ + return DoLoad(wxString( wxT("file://") ) + fileName); +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::Load (URI version) +// +// In the case of a file URI passes it unencoded - +// also, as of 0.10.3 and earlier GstURI (the uri parser for gstreamer) +// is sort of broken and only accepts uris with at least two slashes +// after the scheme (i.e. file: == not ok, file:// == ok) +//----------------------------------------------------------------------------- +bool wxGStreamerMediaBackend::Load(const wxURI& location) +{ + if(location.GetScheme().CmpNoCase(wxT("file")) == 0) + { + wxString uristring = location.BuildUnescapedURI(); + + //Workaround GstURI leading "//" problem and make sure it leads + //with that + return DoLoad(wxString(wxT("file://")) + + uristring.Right(uristring.Length() - 5) + ); + } + else + return DoLoad(location.BuildURI()); +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::DoLoad +// +// Loads the media +// 1) Reset member variables and set playbin back to ready state +// 2) Check URI for validity and then tell the playbin to load it +// 3) Set the playbin to the pause state +// +// NB: Even after this function is over with we probably don't have the +// video size or duration - no amount of clever hacking is going to get +// around that, unfortunately. +//----------------------------------------------------------------------------- +bool wxGStreamerMediaBackend::DoLoad(const wxString& locstring) +{ + wxMutexLocker lock(m_asynclock); // lock state events and async callbacks + + // Reset positions & rate + m_llPausedPos = 0; + m_dRate = 1.0; + m_videoSize = wxSize(0,0); + + // Set playbin to ready to stop the current media... + if( gst_element_set_state (m_playbin, + GST_STATE_READY) == GST_STATE_FAILURE || + !SyncStateChange(m_playbin, GST_STATE_READY)) + { + wxLogSysError(wxT("wxGStreamerMediaBackend::Load - ") + wxT("Could not set initial state to ready")); + return false; + } + + // Make sure the passed URI is valid and tell playbin to load it + // non-file uris are encoded + wxASSERT(gst_uri_protocol_is_valid("file")); + wxASSERT(gst_uri_is_valid(locstring.mb_str())); + + g_object_set (G_OBJECT (m_playbin), "uri", + (const char*)locstring.mb_str(), NULL); + + // Try to pause media as gstreamer won't let us query attributes + // such as video size unless it is paused or playing + if( gst_element_set_state (m_playbin, + GST_STATE_PAUSED) == GST_STATE_FAILURE || + !SyncStateChange(m_playbin, GST_STATE_PAUSED)) + { + return false; // no real error message needed here as this is + // generic failure 99% of the time (i.e. no + // source etc.) and has an error message + } + + + NotifyMovieLoaded(); // Notify the user - all we can do for now + return true; +} + + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::Play +// +// Sets the stream to a playing state +// +// THREAD-UNSAFE in 0.8, maybe in 0.10 as well +//----------------------------------------------------------------------------- +bool wxGStreamerMediaBackend::Play() +{ + if (gst_element_set_state (m_playbin, + GST_STATE_PLAYING) == GST_STATE_FAILURE) + return false; + return true; +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::Pause +// +// Marks where we paused and pauses the stream +// +// THREAD-UNSAFE in 0.8, maybe in 0.10 as well +//----------------------------------------------------------------------------- +bool wxGStreamerMediaBackend::Pause() +{ + m_llPausedPos = wxGStreamerMediaBackend::GetPosition(); + if (gst_element_set_state (m_playbin, + GST_STATE_PAUSED) == GST_STATE_FAILURE) + return false; + return true; +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::Stop +// +// Pauses the stream and sets the position to 0. Note that this is +// synchronous (!) pausing. +// +// Due to the mutex locking this is probably thread-safe actually. +//----------------------------------------------------------------------------- +bool wxGStreamerMediaBackend::Stop() +{ + { // begin state lock + wxMutexLocker lock(m_asynclock); + if(gst_element_set_state (m_playbin, + GST_STATE_PAUSED) == GST_STATE_FAILURE || + !SyncStateChange(m_playbin, GST_STATE_PAUSED)) + { + wxLogSysError(wxT("Could not set state to paused for Stop()")); + return false; + } + } // end state lock + + bool bSeekedOK = wxGStreamerMediaBackend::SetPosition(0); + + if(!bSeekedOK) + { + wxLogSysError(wxT("Could not seek to initial position in Stop()")); + return false; + } + + QueueStopEvent(); // Success + return true; +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::GetState +// +// Gets the state of the media +//----------------------------------------------------------------------------- +wxMediaState wxGStreamerMediaBackend::GetState() +{ + switch(GST_STATE(m_playbin)) + { + case GST_STATE_PLAYING: + return wxMEDIASTATE_PLAYING; + case GST_STATE_PAUSED: + if (m_llPausedPos == 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 +// +// NB: +// NB: At least in 0.8, when you pause and seek gstreamer +// NB: doesn't update the position sometimes, so we need to keep track of +// NB: whether we have paused or not and keep track of the time after the +// NB: pause and whenever the user seeks while paused +// NB: +// +// THREAD-UNSAFE, at least if not paused. Requires media to be at least paused. +//----------------------------------------------------------------------------- +wxLongLong wxGStreamerMediaBackend::GetPosition() +{ + if(GetState() != wxMEDIASTATE_PLAYING) + return m_llPausedPos; + else + { + gint64 pos; + GstFormat fmtTime = GST_FORMAT_TIME; + + if (!wxGst_element_query_position(m_playbin, &fmtTime, &pos) || + fmtTime != GST_FORMAT_TIME || pos == -1) + 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 we are paused we update the cached pause position. +// +// This is also an exceedingly ugly function due to the three implementations +// (or, rather two plus one implementation without a seek function). +// +// This is asynchronous and thread-safe on both 0.8 and 0.10. +// +// NB: This fires both a stop and play event if the media was previously +// playing... which in some ways makes sense. And yes, this makes the video +// go all haywire at times - a gstreamer bug... +//----------------------------------------------------------------------------- +bool wxGStreamerMediaBackend::SetPosition(wxLongLong where) +{ +#if GST_VERSION_MAJOR == 0 && GST_VERSION_MINOR == 8 \ + && GST_VERSION_MICRO == 0 + // 0.8.0 has no gst_element_seek according to official docs!!! + wxLogSysError(wxT("GStreamer 0.8.0 does not have gst_element_seek") + wxT(" according to official docs")); + return false; +#else // != 0.8.0 + +# if GST_VERSION_MAJOR > 0 || GST_VERSION_MINOR >= 10 + gst_element_seek (m_playbin, m_dRate, GST_FORMAT_TIME, + (GstSeekFlags)(GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT), + GST_SEEK_TYPE_SET, where.GetValue() * GST_MSECOND, + GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE ); +# else + // NB: Some gstreamer versions return false basically all the time + // here - even totem doesn't bother to check the return value here + // so I guess we'll just assume it worked - + // TODO: maybe check the gst error callback??? + gst_element_seek (m_playbin, (GstSeekType) (GST_SEEK_METHOD_SET | + GST_FORMAT_TIME | GST_SEEK_FLAG_FLUSH), + where.GetValue() * GST_MSECOND ); + +# endif // GST_VERSION_MAJOR > 0 || GST_VERSION_MINOR >= 10 + + { + m_llPausedPos = where; + return true; + } + return true; +#endif //== 0.8.0 +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::GetDuration +// +// Obtains the total time of our stream +// THREAD-UNSAFE, requires media to be paused or playing +//----------------------------------------------------------------------------- +wxLongLong wxGStreamerMediaBackend::GetDuration() +{ + gint64 length; + GstFormat fmtTime = GST_FORMAT_TIME; + + if(!wxGst_element_query_duration(m_playbin, &fmtTime, &length) || + fmtTime != GST_FORMAT_TIME || length == -1) + 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/gst_notify_caps_callback +// gst_x_overlay_get_desired_size also does this in 0.8... +//----------------------------------------------------------------------------- +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. +// +// In 0.10 GStreamer has new gst_element_seek API that might +// support this - and I've got an attempt to do so but it is untested +// but it would appear to work... +//----------------------------------------------------------------------------- +double wxGStreamerMediaBackend::GetPlaybackRate() +{ + return m_dRate; // Could use GST_QUERY_RATE but the API doesn't seem + // final on that yet and there may not be any actual + // plugins that support it... +} + +bool wxGStreamerMediaBackend::SetPlaybackRate(double dRate) +{ +#if GST_VERSION_MAJOR > 0 || GST_VERSION_MINOR >= 10 +#if 0 // not tested enough + if( gst_element_seek (m_playbin, dRate, GST_FORMAT_TIME, + (GstSeekFlags)(GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT), + GST_SEEK_TYPE_CUR, 0, + GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE ) ) + { + m_dRate = dRate; + return true; + } +#endif +#endif + + // failure + return false; +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::GetDownloadProgress +// +// Not really outwardly possible - have been suggested that one could +// get the information from the component that "downloads" +//----------------------------------------------------------------------------- +wxLongLong wxGStreamerMediaBackend::GetDownloadProgress() +{ + return 0; +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::GetDownloadTotal +// +// TODO: Cache this? +// NB: The length changes every call for some reason due to +// GStreamer implementation issues +// THREAD-UNSAFE, requires media to be paused or playing +//----------------------------------------------------------------------------- +wxLongLong wxGStreamerMediaBackend::GetDownloadTotal() +{ + gint64 length; + GstFormat fmtBytes = GST_FORMAT_BYTES; + + if (!wxGst_element_query_duration(m_playbin, &fmtBytes, &length) || + fmtBytes != GST_FORMAT_BYTES || length == -1) + return 0; + return length; +} + +//----------------------------------------------------------------------------- +// wxGStreamerMediaBackend::SetVolume +// wxGStreamerMediaBackend::GetVolume +// +// Sets/Gets the volume through the playbin object. +// Note that this requires a relatively recent gst-plugins so we +// check at runtime to see whether it is available or not otherwise +// GST spits out an error on the command line +//----------------------------------------------------------------------------- +bool wxGStreamerMediaBackend::SetVolume(double dVolume) +{ + if(g_object_class_find_property( + G_OBJECT_GET_CLASS(G_OBJECT(m_playbin)), + "volume") != NULL) + { + g_object_set(G_OBJECT(m_playbin), "volume", dVolume, NULL); + return true; + } + else + { + wxLogTrace(wxTRACE_GStreamer, + wxT("SetVolume: volume prop not found - 0.8.5 of ") + wxT("gst-plugins probably needed")); + return false; + } +} + +double wxGStreamerMediaBackend::GetVolume() +{ + double dVolume = 1.0; + + if(g_object_class_find_property( + G_OBJECT_GET_CLASS(G_OBJECT(m_playbin)), + "volume") != NULL) + { + g_object_get(G_OBJECT(m_playbin), "volume", &dVolume, NULL); + } + else + { + wxLogTrace(wxTRACE_GStreamer, + wxT("GetVolume: volume prop not found - 0.8.5 of ") + wxT("gst-plugins probably needed")); + } + + return dVolume; +} + +#endif //wxUSE_GSTREAMER + +// Force link into main library so this backend can be loaded +#include "wx/html/forcelnk.h" +FORCE_LINK_ME(basewxmediabackends) + +#endif //wxUSE_MEDIACTRL