以下參考 https://patches.videolan.org/patch/606/
vi include/vlc/libvlc_events.h
enum libvlc_event_e {
libvlc_MediaPlayerMediaChanged=0x100,
libvlc_MediaPlayerRecordableChanged,
libvlc_MediaPlayerRecordingFinished,
libvlc_MediaListItemAdded=0x200,
};
typedef struct libvlc_event_t
{
union
{
struct
{
int new_recordable;
} media_player_recordable_changed;
struct
{
char *psz_filename;
} media_player_recording_finished;
} u;
} libvlc_event_t;
vi include/vlc/libvlc_media_player.h
/** @} audio */
/**
* Can the media player record the current media?
*
* Media must be buffering or playing before it can be recorded.
*
* The media player event manager will emit a libvlc_MediaPlayerRecordableChanged event
* when the recordable state changes after starting media playback. The event data will
* describe the new recordable state, so invocation of this API method is not strictly
* necessary to determine when recording can be started.
*
* A libvlc_MediaPlayerRecordableChanged event will not be emitted if the media is
* stopped (notified by a libvlc_MediaPlayerStoppedEvent) or finishes normally (notified
* by a libvlc_MediaPlayerFinished event).
*
* A calling application should therefore register an event callback for those events
* so that it may query the new recordable state and manage recording at the appropriate
* time.
*
* \param p_mi media player
* \return true if the media player can record, false if it can not
* \version LibVLC 2.1.0 or later
*/
LIBVLC_API bool libvlc_media_player_is_recordable( libvlc_media_player_t *p_mi );
/**
* Is the current media being recorded?
*
* \param p_mi media player
* \return true if recording, false if not
* \version LibVLC 2.1.0 or later
*/
LIBVLC_API bool libvlc_media_player_is_recording( libvlc_media_player_t *p_mi );
/**
* Start recording the current media.
*
* Media must be buffering or playing before it can be recorded. A calling application
* can begin recording immediately on receipt of a libvlc_MediaPlayerRecordableChanged
* event sent via the media player event manager (if recording is possible for the
* currently playing media), and any time thereafter until the media stops.
*
* Media will be saved to the file path denoted by the psz_filename parameter if it is
* supplied. Any such supplied filename should not include a file extension as the
* correct file extension will automatically be appended when the file is created. This
* filename may denote a full path name, but each directory in the path must already
* exist or recording will silently fail. If the calling application chooses to specify
* the filename then it is the responsibility of that application to take account of
* this and itself make sure any needed directories are created.
*
* Alternatively, a calling application need not supply a filename and so instead let
* vlc automatically generate a unique filename. This will cause vlc to create a new
* file in the appropriate media directory for the user - for example "~/Videos". The
* actual filename used will be sent in an event when the recording is complete.
*
* When recording has finished and the new file has been completely saved, a
* libvlc_MediaPlayerRecordingFinished event will be sent via the media player event
* manager. The event data will contain the filename of the newly recorded file - this
* will either be the filename as specified by the calling application or a filename
* generated by vlc if the application did not supply a filename. In either case, this
* filename will include the automatically appended file extension.
*
* The saved media file will not be immediately available or visible until recording
* has completely finished and the libvlc_MediaPlayerRecordingFinished event has been
* received, or the media has stopped or finished normally.
*
* Recording can be stopped and started on-the-fly once the recordable state is set;
* each time recording is stopped and restarted a new file will be created so a calling
* application should take care to provide unique filenames, or defer to vlc to create
* unique filenames.
*
* Recording will be stopped when the media stops playing, and must be explicitly
* started again to restart recording, i.e. the recording state is not automatically
* preserved when playing media subsequently.
*
* Media player functionailty such as next/previous chapter, set time or position and
* so on are ineffective when recording is enabled. However, pausing the media is
* possible and will pause the recording; unpausing the media will resume playback and
* recording.
*
* Recording of the primary media or sub-items is possible.
*
* \param p_mi media player
* \param psz_filename name of the file to save the media to, not including any file extension,
* or NULL if vlc should generate the filename automatically
* \return 0 if recording was started, -1 on error
* \version LibVLC 2.1.0 or later
*/
LIBVLC_API int libvlc_media_player_record_start( libvlc_media_player_t *p_mi, const char *psz_filename );
/**
* Stop recording the current media.
*
* This method requests that the recording stop, and will return immediately. Recording
* will not stop immediately.
*
* When the recording actually stops some short time later and the new file has
* finished being written, a libvlc_MediaPlayerRecordingFinished event will be sent via
* the media player event manager. The newly recorded file will not be visible or
* available until after this event has been sent.
*
* The event data will contain the full name of the file that was created. The filename
* will either be that as was specified by the calling application on invoking
* libvlc_media_player_record_start(), or the filename that vlc automatically generated
* if the calling application did not supply its own filename. In either case the
* filename will contain the automatically appended file extension.
*
* There is no need to invoke this method to stop the recording if the media is stopped
* or finishes playing normally.
*
* \param p_mi media player
* \return 0 if recording was stopped, -1 on error
* \version LibVLC 2.1.0 or later
*/
LIBVLC_API int libvlc_media_player_record_stop( libvlc_media_player_t *p_mi );
/**
/** @} media_player */
vi lib/event.c
static const event_name_t event_list[] = {
DEF(MediaPlayerAudioDevice)
DEF(MediaPlayerRecordableChanged)
DEF(MediaPlayerRecordingFinished)
vi lib/libvlc.sym
libvlc_media_player_has_vout
libvlc_media_player_is_recordable
libvlc_media_player_is_recording
libvlc_media_player_is_seekable
libvlc_media_player_previous_chapter
libvlc_media_player_record_start
libvlc_media_player_record_stop
libvlc_media_player_release
vi lib/media_player.c
static int
input_recordable_changed( vlc_object_t *p_this, char const *psz_cmd,
vlc_value_t oldval, vlc_value_t newval,
void *p_userdata );
static int
file_recording_finished( vlc_object_t *p_this, char const *psz_cmd,
vlc_value_t oldval, vlc_value_t newval, void *p_data );
static void release_input_thread( libvlc_media_player_t *p_mi )
{
var_DelCallback( p_input_thread, "can-record",
input_recordable_changed, p_mi );
}
static int
input_recordable_changed( vlc_object_t *p_this, char const *psz_cmd,
vlc_value_t oldval, vlc_value_t newval,
void *p_userdata )
{
VLC_UNUSED(p_this);
VLC_UNUSED(psz_cmd);
VLC_UNUSED(oldval);
libvlc_media_player_t *p_mi = p_userdata;
libvlc_event_t event;
event.type = libvlc_MediaPlayerRecordableChanged;
event.u.media_player_recordable_changed.new_recordable = newval.b_bool;
libvlc_event_send( p_mi->p_event_manager, &event );
return VLC_SUCCESS;
}
static int file_recording_finished(vlc_object_t *p_this, char const *psz_cmd,
vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
VLC_UNUSED(p_this);
VLC_UNUSED(psz_cmd);
VLC_UNUSED(oldval);
libvlc_media_player_t *p_mi = p_data;
libvlc_event_t event;
event.type = libvlc_MediaPlayerRecordingFinished;
event.u.media_player_recording_finished.psz_filename = newval.psz_string;
libvlc_event_send(p_mi->p_event_manager, &event);
return VLC_SUCCESS;
}
libvlc_media_player_new( libvlc_instance_t *instance )
{
var_Create (mp, "recording-finished", VLC_VAR_STRING);
var_AddCallback (mp, "recording-finished", file_recording_finished, mp);
}
static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi )
{
var_DelCallback( p_mi, "recording-finished", file_recording_finished, p_mi );
}
int libvlc_media_player_play( libvlc_media_player_t *p_mi )
{
var_AddCallback( p_input_thread, "can-record", input_recordable_changed, p_mi );
if( input_Start( p_input_thread ) )
{
var_DelCallback( p_input_thread, "can-record", input_recordable_changed, p_mi );
}
}
bool libvlc_media_player_is_recordable( libvlc_media_player_t *p_mi )
{
input_thread_t *p_input_thread;
bool b_can_record;
p_input_thread = libvlc_get_input_thread( p_mi );
if( !p_input_thread )
return false;
b_can_record = var_GetBool( p_input_thread, "can-record" );
vlc_object_release( p_input_thread );
return b_can_record;
}
bool libvlc_media_player_is_recording( libvlc_media_player_t *p_mi )
{
input_thread_t *p_input_thread;
bool b_record;
p_input_thread = libvlc_get_input_thread( p_mi );
if( !p_input_thread )
return false;
b_record = var_GetBool( p_input_thread, "record" );
vlc_object_release( p_input_thread );
return b_record;
}
int libvlc_media_player_record_start( libvlc_media_player_t *p_mi, const char* psz_filename )
{
input_thread_t *p_input_thread;
p_input_thread = libvlc_get_input_thread( p_mi );
if( !p_input_thread )
return -1;
var_SetString( p_input_thread, "input-record-path", psz_filename );
var_SetBool( p_input_thread, "record", true );
vlc_object_release( p_input_thread );
return 0;
}
int libvlc_media_player_record_stop( libvlc_media_player_t *p_mi )
{
input_thread_t *p_input_thread;
p_input_thread = libvlc_get_input_thread( p_mi );
if( !p_input_thread )
return -1;
var_SetBool( p_input_thread, "record", false );
vlc_object_release( p_input_thread );
return 0;
}
vi modules/stream_out/record.c
struct sout_stream_sys_t
{
char *psz_record_file;
};
static int Open( vlc_object_t *p_this )
{
p_sys->psz_record_file = NULL;
return VLC_SUCCESS;
}
static void Close( vlc_object_t * p_this )
{
if( p_sys->psz_record_file ) {
for( vlc_object_t *p_mp = p_stream->p_parent; p_mp; p_mp = p_mp->p_parent )
{
if( var_Type( p_mp, "recording-finished" ) )
{
var_SetString( p_mp, "recording-finished", p_sys->psz_record_file );
break;
}
}
free( p_sys->psz_record_file );
}
TAB_CLEAN( p_sys->i_id, p_sys->id );
free( p_sys->psz_prefix );
free( p_sys );
}
static int OutputNew( sout_stream_t *p_stream,
const char *psz_muxer, const char *psz_prefix, const char *psz_extension )
{
if( psz_file && psz_extension )
{
p_sys->psz_record_file = strdup( psz_file );
var_SetString( p_stream->p_libvlc, "record-file", psz_file );
}
}
void input_ControlVarInit ( input_thread_t *p_input )
{
/* ES Out */
var_Create( p_input, "input-record-path", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
}
