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 *****************************************************************************/
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;
71 - (void)outputVideoFrame:(CVImageBufferRef)videoFrame withSampleBuffer:(QTSampleBuffer *)sampleBuffer fromConnection:(QTCaptureConnection *)connection;
72 - (BOOL)copyCurrentFrameToBuffer:(void *)buffer;
75 /* Apple sample code */
76 @implementation VLCDecompressedVideoOutput : QTCaptureDecompressedVideoOutput
79 if( self = [super init] )
81 currentImageBuffer = nil;
87 @synchronized (self) {
88 CVBufferRelease(currentImageBuffer);
89 currentImageBuffer = nil;
94 - (void)outputVideoFrame:(CVImageBufferRef)videoFrame withSampleBuffer:(QTSampleBuffer *)sampleBuffer fromConnection:(QTCaptureConnection *)connection
96 // Store the latest frame
97 // This must be done in a @synchronized block because this delegate method is not called on the main thread
98 CVImageBufferRef imageBufferToRelease;
100 CVBufferRetain(videoFrame);
102 @synchronized (self) {
103 imageBufferToRelease = currentImageBuffer;
104 currentImageBuffer = videoFrame;
106 CVBufferRelease(imageBufferToRelease);
109 - (BOOL)copyCurrentFrameToBuffer:(void *)buffer
111 CVImageBufferRef imageBuffer;
113 @synchronized (self) {
114 if(!currentImageBuffer) return NO;
115 imageBuffer = CVBufferRetain(currentImageBuffer);
118 CVPixelBufferLockBaseAddress(imageBuffer, 0);
119 void * pixels = CVPixelBufferGetBaseAddress(imageBuffer);
120 memcpy( buffer, pixels, CVPixelBufferGetBytesPerRow(imageBuffer) * CVPixelBufferGetHeight(imageBuffer) );
121 CVPixelBufferUnlockBaseAddress(imageBuffer, 0);
123 CVBufferRelease(imageBuffer);
130 /*****************************************************************************
132 *****************************************************************************/
135 QTCaptureSession * session;
136 VLCDecompressedVideoOutput * output;
138 es_out_id_t * p_es_video;
142 /*****************************************************************************
144 *****************************************************************************/
145 static int qtchroma_to_fourcc( int i_qt )
151 } qtchroma_to_fourcc[] =
154 { k422YpCbCr8CodecType, VLC_FOURCC('U','Y','V','Y') },
158 for( i = 0; qtchroma_to_fourcc[i].i_qt; i++ )
160 if( qtchroma_to_fourcc[i].i_qt == i_qt )
161 return qtchroma_to_fourcc[i].i_fourcc;
166 /*****************************************************************************
168 *****************************************************************************/
169 static int Open( vlc_object_t *p_this )
171 demux_t *p_demux = (demux_t*)p_this;
172 demux_sys_t *p_sys = NULL;
181 p_demux->pf_demux = Demux;
182 p_demux->pf_control = Control;
183 p_demux->info.i_update = 0;
184 p_demux->info.i_title = 0;
185 p_demux->info.i_seekpoint = 0;
187 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
189 msg_Dbg( p_demux, "QTCapture Probed" );
191 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
192 if( !p_sys ) return VLC_ENOMEM;
194 memset( p_sys, 0, sizeof( demux_sys_t ) );
195 memset( &fmt, 0, sizeof( es_format_t ) );
197 QTCaptureDeviceInput * input = nil;
198 QTCaptureSession * session = nil;
199 VLCDecompressedVideoOutput * output = nil;
201 QTCaptureDevice * device = [QTCaptureDevice defaultInputDeviceWithMediaType: QTMediaTypeVideo];
204 msg_Err( p_demux, "Can't open any Video device" );
208 if( ![device open: nil /* FIXME */] )
210 msg_Err( p_demux, "Can't open any Video device" );
214 input = [[QTCaptureDeviceInput alloc] initWithDevice: device];
217 msg_Err( p_demux, "Can't create a capture session" );
221 output = [[VLCDecompressedVideoOutput alloc] init];
223 session = [[QTCaptureSession alloc] init];
225 bool ret = [session addInput:input error:nil /* FIXME */];
228 msg_Err( p_demux, "Can't add the video device as input" );
232 ret = [session addOutput:output error:nil /* FIXME */];
235 msg_Err( p_demux, "Can't get any output output" );
239 [session startRunning];
241 int qtchroma = [[[device formatDescriptions] objectAtIndex: 0] formatType]; /* FIXME */
242 int chroma = qtchroma_to_fourcc( qtchroma );
245 msg_Err( p_demux, "Unknown qt chroma %4.4s provided by camera", (char*)&qtchroma );
249 es_format_Init( &fmt, VIDEO_ES, chroma );
251 NSSize size = [[device attributeForKey:QTFormatDescriptionVideoEncodedPixelsSizeAttribute] sizeValue];
252 p_sys->width = fmt.video.i_width = 640;/* size.width; FIXME */
253 p_sys->height = fmt.video.i_height = 480;/* size.height; FIXME */
255 msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
256 (char*)&fmt.i_codec, fmt.video.i_width, fmt.video.i_height );
258 p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
260 p_sys->output = [output retain];
261 p_sys->session = [session retain];
268 msg_Dbg( p_demux, "QTCapture: We have a video device ready!" );
283 /*****************************************************************************
285 *****************************************************************************/
286 static void Close( vlc_object_t *p_this )
288 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
290 demux_t *p_demux = (demux_t*)p_this;
291 demux_sys_t *p_sys = p_demux->p_sys;
292 [p_sys->output release];
293 [p_sys->session release];
300 /*****************************************************************************
302 *****************************************************************************/
303 static int Demux( demux_t *p_demux )
305 demux_sys_t *p_sys = p_demux->p_sys;
308 p_block = block_New( p_demux, p_sys->width *
309 p_sys->height * 2 /* FIXME */ );
312 msg_Err( p_demux, "cannot get block" );
316 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
318 if( ![p_sys->output copyCurrentFrameToBuffer: p_block->p_buffer] )
320 /* Nothing to display yet, just forget */
321 block_Release( p_block );
326 p_block->i_pts = mdate(); /* FIXME */
328 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
329 es_out_Send( p_demux->out, p_sys->p_es_video, p_block );
335 /*****************************************************************************
337 *****************************************************************************/
338 static int Control( demux_t *p_demux, int i_query, va_list args )
345 /* Special for access_demux */
346 case DEMUX_CAN_PAUSE:
348 case DEMUX_SET_PAUSE_STATE:
349 case DEMUX_CAN_CONTROL_PACE:
350 pb = (bool*)va_arg( args, bool * );
354 case DEMUX_GET_PTS_DELAY:
355 pi64 = (int64_t*)va_arg( args, int64_t * );
356 *pi64 = (int64_t)DEFAULT_PTS_DELAY;
360 pi64 = (int64_t*)va_arg( args, int64_t * );
364 /* TODO implement others */