1 /*****************************************************************************
2 * qtcapture.m: qtkit (Mac OS X) based capture module
3 *****************************************************************************
4 * Copyright (C) 2008 the VideoLAN team
6 * Authors: Pierre d'Herbemont <pdherbemont@videolan.org>
8 *****************************************************************************
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation;
12 * version 2 of the License.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
35 #include <vlc_input.h>
37 #include <vlc_demux.h>
38 #include <vlc_interface.h>
40 #import <QTKit/QTKit.h>
41 #import <CoreAudio/CoreAudio.h>
43 /*****************************************************************************
45 *****************************************************************************/
46 static int Open( vlc_object_t *p_this );
47 static void Close( vlc_object_t *p_this );
48 static int Demux( demux_t *p_demux );
49 static int Control( demux_t *, int, va_list );
51 /*****************************************************************************
53 *****************************************************************************/
55 set_shortname( N_("Quicktime Capture") );
56 set_description( N_("Quicktime Capture") );
57 set_category( CAT_INPUT );
58 set_subcategory( SUBCAT_INPUT_ACCESS );
59 add_shortcut( "qtcapture" );
60 set_capability( "access_demux", 10 );
61 set_callbacks( Open, Close );
65 /*****************************************************************************
67 *****************************************************************************/
68 @interface VLCDecompressedVideoOutput : QTCaptureDecompressedVideoOutput
70 CVImageBufferRef currentImageBuffer;
75 - (void)outputVideoFrame:(CVImageBufferRef)videoFrame withSampleBuffer:(QTSampleBuffer *)sampleBuffer fromConnection:(QTCaptureConnection *)connection;
76 - (mtime_t)copyCurrentFrameToBuffer:(void *)buffer;
79 /* Apple sample code */
80 @implementation VLCDecompressedVideoOutput : QTCaptureDecompressedVideoOutput
83 if( self = [super init] )
85 currentImageBuffer = nil;
95 CVBufferRelease(currentImageBuffer);
96 currentImageBuffer = nil;
101 - (void)outputVideoFrame:(CVImageBufferRef)videoFrame withSampleBuffer:(QTSampleBuffer *)sampleBuffer fromConnection:(QTCaptureConnection *)connection
103 // Store the latest frame
104 // This must be done in a @synchronized block because this delegate method is not called on the main thread
105 CVImageBufferRef imageBufferToRelease;
107 CVBufferRetain(videoFrame);
111 imageBufferToRelease = currentImageBuffer;
112 currentImageBuffer = videoFrame;
113 currentPts = (mtime_t)(1000000L / [sampleBuffer presentationTime].timeScale * [sampleBuffer presentationTime].timeValue);
115 /* Try to use hosttime of the sample if available, because iSight Pts seems broken */
116 NSNumber *hosttime = (NSNumber *)[sampleBuffer attributeForKey:QTSampleBufferHostTimeAttribute];
117 if( hosttime ) currentPts = (mtime_t)AudioConvertHostTimeToNanos([hosttime unsignedLongLongValue])/1000;
119 CVBufferRelease(imageBufferToRelease);
122 - (mtime_t)copyCurrentFrameToBuffer:(void *)buffer
124 CVImageBufferRef imageBuffer;
127 if(!currentImageBuffer || currentPts == previousPts )
132 imageBuffer = CVBufferRetain(currentImageBuffer);
133 pts = previousPts = currentPts;
135 CVPixelBufferLockBaseAddress(imageBuffer, 0);
136 void * pixels = CVPixelBufferGetBaseAddress(imageBuffer);
137 memcpy( buffer, pixels, CVPixelBufferGetBytesPerRow(imageBuffer) * CVPixelBufferGetHeight(imageBuffer) );
138 CVPixelBufferUnlockBaseAddress(imageBuffer, 0);
141 CVBufferRelease(imageBuffer);
148 /*****************************************************************************
150 *****************************************************************************/
153 QTCaptureSession * session;
154 QTCaptureDevice * device;
155 VLCDecompressedVideoOutput * output;
157 es_out_id_t * p_es_video;
161 /*****************************************************************************
163 *****************************************************************************/
164 static int qtchroma_to_fourcc( int i_qt )
170 } qtchroma_to_fourcc[] =
173 { k422YpCbCr8CodecType, VLC_FOURCC('U','Y','V','Y') },
177 for( i = 0; qtchroma_to_fourcc[i].i_qt; i++ )
179 if( qtchroma_to_fourcc[i].i_qt == i_qt )
180 return qtchroma_to_fourcc[i].i_fourcc;
185 /*****************************************************************************
187 *****************************************************************************/
188 static int Open( vlc_object_t *p_this )
190 demux_t *p_demux = (demux_t*)p_this;
191 demux_sys_t *p_sys = NULL;
199 /* Only when selected */
200 if( *p_demux->psz_access == '\0' )
203 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
206 p_demux->pf_demux = Demux;
207 p_demux->pf_control = Control;
208 p_demux->info.i_update = 0;
209 p_demux->info.i_title = 0;
210 p_demux->info.i_seekpoint = 0;
212 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
213 if( !p_sys ) return VLC_ENOMEM;
215 memset( p_sys, 0, sizeof( demux_sys_t ) );
216 memset( &fmt, 0, sizeof( es_format_t ) );
218 msg_Dbg( p_demux, "QTCapture Probed" );
220 QTCaptureDeviceInput * input = nil;
221 NSError *o_returnedError;
223 p_sys->device = [QTCaptureDevice defaultInputDeviceWithMediaType: QTMediaTypeVideo];
226 intf_UserFatal( p_demux, true, _("No Input device found"),
227 _("Your Mac does not seem to be equipped with a suitable input device. "
228 "Please check your connectors and drivers.") );
229 msg_Err( p_demux, "Can't find any Video device" );
234 if( ![p_sys->device open: &o_returnedError] )
236 msg_Err( p_demux, "Unable to open the capture device (%i)", [o_returnedError code] );
240 if( [p_sys->device isInUseByAnotherApplication] == YES )
242 msg_Err( p_demux, "default capture device is exclusively in use by another application" );
246 input = [[QTCaptureDeviceInput alloc] initWithDevice: p_sys->device];
249 msg_Err( p_demux, "can't create a valid capture input facility" );
253 p_sys->output = [[VLCDecompressedVideoOutput alloc] init];
255 /* Hack - This will lower CPU consumption for some reason */
256 [p_sys->output setPixelBufferAttributes: [NSDictionary dictionaryWithObjectsAndKeys:
257 [NSNumber numberWithInt:480], kCVPixelBufferHeightKey,
258 [NSNumber numberWithInt:640], kCVPixelBufferWidthKey, nil]];
260 p_sys->session = [[QTCaptureSession alloc] init];
262 bool ret = [p_sys->session addInput:input error: &o_returnedError];
265 msg_Err( p_demux, "default video capture device could not be added to capture session (%i)", [o_returnedError code] );
269 ret = [p_sys->session addOutput:p_sys->output error: &o_returnedError];
272 msg_Err( p_demux, "output could not be added to capture session (%i)", [o_returnedError code] );
276 [p_sys->session startRunning];
279 int qtchroma = [[[p_sys->device formatDescriptions] objectAtIndex: 0] formatType]; /* FIXME */
280 int chroma = qtchroma_to_fourcc( qtchroma );
283 msg_Err( p_demux, "Unknown qt chroma %4.4s provided by camera", (char*)&qtchroma );
287 /* Now we can init */
289 es_format_Init( &fmt, VIDEO_ES, chroma );
291 NSSize size = [[p_sys->device attributeForKey:QTFormatDescriptionVideoEncodedPixelsSizeAttribute] sizeValue];
292 p_sys->width = fmt.video.i_width = 640;/* size.width; FIXME */
293 p_sys->height = fmt.video.i_height = 480;/* size.height; FIXME */
295 msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
296 (char*)&fmt.i_codec, fmt.video.i_width, fmt.video.i_height );
298 p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
303 msg_Dbg( p_demux, "QTCapture: We have a video device ready!" );
315 /*****************************************************************************
317 *****************************************************************************/
318 static void Close( vlc_object_t *p_this )
320 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
322 demux_t *p_demux = (demux_t*)p_this;
323 demux_sys_t *p_sys = p_demux->p_sys;
325 /* Hack: if libvlc was killed, main interface thread was,
326 * and poor QTKit needs it, so don't tell him.
327 * Else we dead lock. */
328 if( vlc_object_alive(p_this->p_libvlc))
330 [p_sys->session stopRunning];
331 [p_sys->output release];
332 [p_sys->session release];
340 /*****************************************************************************
342 *****************************************************************************/
343 static int Demux( demux_t *p_demux )
345 demux_sys_t *p_sys = p_demux->p_sys;
348 p_block = block_New( p_demux, p_sys->width *
349 p_sys->height * 2 /* FIXME */ );
352 msg_Err( p_demux, "cannot get block" );
356 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
358 @synchronized (p_sys->output)
360 p_block->i_pts = [p_sys->output copyCurrentFrameToBuffer: p_block->p_buffer];
363 if( !p_block->i_pts )
365 /* Nothing to display yet, just forget */
366 block_Release( p_block );
372 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
373 es_out_Send( p_demux->out, p_sys->p_es_video, p_block );
379 /*****************************************************************************
381 *****************************************************************************/
382 static int Control( demux_t *p_demux, int i_query, va_list args )
389 /* Special for access_demux */
390 case DEMUX_CAN_PAUSE:
392 case DEMUX_SET_PAUSE_STATE:
393 case DEMUX_CAN_CONTROL_PACE:
394 pb = (bool*)va_arg( args, bool * );
398 case DEMUX_GET_PTS_DELAY:
399 pi64 = (int64_t*)va_arg( args, int64_t * );
400 *pi64 = (int64_t)DEFAULT_PTS_DELAY;