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>
39 #import <QTKit/QTKit.h>
41 /*****************************************************************************
43 *****************************************************************************/
44 static int Open( vlc_object_t *p_this );
45 static void Close( vlc_object_t *p_this );
46 static int Demux( demux_t *p_demux );
47 static int Control( demux_t *, int, va_list );
49 /*****************************************************************************
51 *****************************************************************************/
53 set_shortname( N_("Quicktime Capture") );
54 set_description( N_("Quicktime Capture") );
55 set_category( CAT_INPUT );
56 set_subcategory( SUBCAT_INPUT_ACCESS );
57 add_shortcut( "qtcapture" );
58 set_capability( "access_demux", 10 );
59 set_callbacks( Open, Close );
63 /*****************************************************************************
65 *****************************************************************************/
66 @interface VLCDecompressedVideoOutput : QTCaptureDecompressedVideoOutput
68 CVImageBufferRef currentImageBuffer;
72 - (void)outputVideoFrame:(CVImageBufferRef)videoFrame withSampleBuffer:(QTSampleBuffer *)sampleBuffer fromConnection:(QTCaptureConnection *)connection;
73 - (mtime_t)copyCurrentFrameToBuffer:(void *)buffer;
76 /* Apple sample code */
77 @implementation VLCDecompressedVideoOutput : QTCaptureDecompressedVideoOutput
80 if( self = [super init] )
82 currentImageBuffer = nil;
91 CVBufferRelease(currentImageBuffer);
92 currentImageBuffer = nil;
97 - (void)outputVideoFrame:(CVImageBufferRef)videoFrame withSampleBuffer:(QTSampleBuffer *)sampleBuffer fromConnection:(QTCaptureConnection *)connection
99 // Store the latest frame
100 // This must be done in a @synchronized block because this delegate method is not called on the main thread
101 CVImageBufferRef imageBufferToRelease;
103 CVBufferRetain(videoFrame);
107 imageBufferToRelease = currentImageBuffer;
108 currentImageBuffer = videoFrame;
109 currentPts = [sampleBuffer presentationTime].timeValue;
111 CVBufferRelease(imageBufferToRelease);
114 - (mtime_t)copyCurrentFrameToBuffer:(void *)buffer
116 CVImageBufferRef imageBuffer;
119 if(!currentImageBuffer)
124 imageBuffer = CVBufferRetain(currentImageBuffer);
127 CVPixelBufferLockBaseAddress(imageBuffer, 0);
128 void * pixels = CVPixelBufferGetBaseAddress(imageBuffer);
129 memcpy( buffer, pixels, CVPixelBufferGetBytesPerRow(imageBuffer) * CVPixelBufferGetHeight(imageBuffer) );
130 CVPixelBufferUnlockBaseAddress(imageBuffer, 0);
133 CVBufferRelease(imageBuffer);
140 /*****************************************************************************
142 *****************************************************************************/
145 QTCaptureSession * session;
146 QTCaptureDevice * device;
147 VLCDecompressedVideoOutput * output;
149 es_out_id_t * p_es_video;
153 /*****************************************************************************
155 *****************************************************************************/
156 static int qtchroma_to_fourcc( int i_qt )
162 } qtchroma_to_fourcc[] =
165 { k422YpCbCr8CodecType, VLC_FOURCC('U','Y','V','Y') },
169 for( i = 0; qtchroma_to_fourcc[i].i_qt; i++ )
171 if( qtchroma_to_fourcc[i].i_qt == i_qt )
172 return qtchroma_to_fourcc[i].i_fourcc;
177 /*****************************************************************************
179 *****************************************************************************/
180 static int Open( vlc_object_t *p_this )
182 demux_t *p_demux = (demux_t*)p_this;
183 demux_sys_t *p_sys = NULL;
191 /* Only when selected */
192 if( *p_demux->psz_access == '\0' )
195 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
198 p_demux->pf_demux = Demux;
199 p_demux->pf_control = Control;
200 p_demux->info.i_update = 0;
201 p_demux->info.i_title = 0;
202 p_demux->info.i_seekpoint = 0;
204 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
205 if( !p_sys ) return VLC_ENOMEM;
207 memset( p_sys, 0, sizeof( demux_sys_t ) );
208 memset( &fmt, 0, sizeof( es_format_t ) );
210 msg_Dbg( p_demux, "QTCapture Probed" );
212 QTCaptureDeviceInput * input = nil;
214 p_sys->device = [QTCaptureDevice defaultInputDeviceWithMediaType: QTMediaTypeVideo];
217 msg_Err( p_demux, "Can't find any Video device" );
221 if( ![p_sys->device open: nil /* FIXME */] )
223 msg_Err( p_demux, "Can't open any Video device" );
227 input = [[QTCaptureDeviceInput alloc] initWithDevice: p_sys->device];
230 msg_Err( p_demux, "Can't create a capture session" );
234 p_sys->output = [[VLCDecompressedVideoOutput alloc] init];
236 /* Hack - This will lower CPU consumption for some reason */
237 [p_sys->output setPixelBufferAttributes: [NSDictionary dictionaryWithObjectsAndKeys:
238 [NSNumber numberWithInt:480], kCVPixelBufferHeightKey,
239 [NSNumber numberWithInt:640], kCVPixelBufferWidthKey, nil]];
241 p_sys->session = [[QTCaptureSession alloc] init];
243 bool ret = [p_sys->session addInput:input error:nil /* FIXME */];
246 msg_Err( p_demux, "Can't add the video device as input" );
250 ret = [p_sys->session addOutput:p_sys->output error:nil /* FIXME */];
253 msg_Err( p_demux, "Can't get any output output" );
257 [p_sys->session startRunning];
260 int qtchroma = [[[p_sys->device formatDescriptions] objectAtIndex: 0] formatType]; /* FIXME */
261 int chroma = qtchroma_to_fourcc( qtchroma );
264 msg_Err( p_demux, "Unknown qt chroma %4.4s provided by camera", (char*)&qtchroma );
268 /* Now we can init */
270 es_format_Init( &fmt, VIDEO_ES, chroma );
272 NSSize size = [[p_sys->device attributeForKey:QTFormatDescriptionVideoEncodedPixelsSizeAttribute] sizeValue];
273 p_sys->width = fmt.video.i_width = 640;/* size.width; FIXME */
274 p_sys->height = fmt.video.i_height = 480;/* size.height; FIXME */
276 msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
277 (char*)&fmt.i_codec, fmt.video.i_width, fmt.video.i_height );
279 p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
284 msg_Dbg( p_demux, "QTCapture: We have a video device ready!" );
296 /*****************************************************************************
298 *****************************************************************************/
299 static void Close( vlc_object_t *p_this )
301 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
303 demux_t *p_demux = (demux_t*)p_this;
304 demux_sys_t *p_sys = p_demux->p_sys;
306 [p_sys->session stopRunning];
307 [p_sys->output release];
308 [p_sys->session release];
309 [p_sys->device release];
316 /*****************************************************************************
318 *****************************************************************************/
319 static int Demux( demux_t *p_demux )
321 demux_sys_t *p_sys = p_demux->p_sys;
324 p_block = block_New( p_demux, p_sys->width *
325 p_sys->height * 2 /* FIXME */ );
328 msg_Err( p_demux, "cannot get block" );
332 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
334 @synchronized (p_sys->output)
336 p_block->i_pts = [p_sys->output copyCurrentFrameToBuffer: p_block->p_buffer];
339 if( !p_block->i_pts )
341 /* Nothing to display yet, just forget */
342 block_Release( p_block );
348 p_block->i_pts = mdate();
350 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
351 es_out_Send( p_demux->out, p_sys->p_es_video, p_block );
357 /*****************************************************************************
359 *****************************************************************************/
360 static int Control( demux_t *p_demux, int i_query, va_list args )
367 /* Special for access_demux */
368 case DEMUX_CAN_PAUSE:
370 case DEMUX_SET_PAUSE_STATE:
371 case DEMUX_CAN_CONTROL_PACE:
372 pb = (bool*)va_arg( args, bool * );
376 case DEMUX_GET_PTS_DELAY:
377 pi64 = (int64_t*)va_arg( args, int64_t * );
378 *pi64 = (int64_t)DEFAULT_PTS_DELAY;
382 pi64 = (int64_t*)va_arg( args, int64_t * );
386 /* TODO implement others */