mirror of https://code.videolan.org/videolan/vlc
qtcapture: New access_demux module (QTKit based) to capture video from your iSight Camera on Mac OS X.
Usage: 'vlc qtcapture://'. This is a 2 hours hacked module. We don't grab sound yet, and there are a lot of FIXME. Note: For some reason QTKit needs a the main thread to be a cocoa thread. Don't expect it to run with -I dummy for instance.
This commit is contained in:
Pierre d'Herbemont
parent
3dfed6db96
commit
9dcd81a1dc
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@ -5528,18 +5528,20 @@ AC_ARG_ENABLE(macosx,
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if test "x${enable_macosx}" = "xyes"
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then
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# VLC_ADD_LDFLAGS([access_eyetv], [-Wl,-framework,Foundation])
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VLC_ADD_LDFLAGS([macosx minimal_macosx opengllayer],[-Wl,-framework,Cocoa])
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VLC_ADD_LDFLAGS([macosx minimal_macosx opengllayer qtcapture],[-Wl,-framework,Cocoa])
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VLC_ADD_LDFLAGS([macosx minimal_macosx opengllayer],[-Wl,-framework,OpenGL])
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VLC_ADD_LDFLAGS([macosx minimal_macosx], [-Wl,-framework,Carbon])
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VLC_ADD_LDFLAGS([macosx minimal_macosx], [-Wl,-framework,AGL])
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VLC_ADD_LDFLAGS([macosx], [-Wl,-framework,IOKit])
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VLC_ADD_LDFLAGS([macosx], [-Wl,-framework,QuickTime])
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VLC_ADD_LDFLAGS([macosx], [-Wl,-framework,QTKit])
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VLC_ADD_LDFLAGS([macosx qtcapture], [-Wl,-framework,QTKit])
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VLC_ADD_LDFLAGS([macosx], [-Wl,-framework,WebKit])
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VLC_ADD_LDFLAGS([opengllayer], [-Wl,-framework,QuartzCore])
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VLC_ADD_LDFLAGS([opengllayer qtcapture], [-Wl,-framework,QuartzCore])
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VLC_ADD_LDFLAGS([qtcapture], [-Wl,-framework,CoreVideo])
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VLC_ADD_OBJCFLAGS([macosx minimal_macosx opengllayer growl], [-fobjc-exceptions] )
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# VLC_ADD_PLUGIN([access_eyetv])
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VLC_ADD_PLUGIN([qtcapture])
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VLC_ADD_PLUGIN([macosx])
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VLC_ADD_PLUGIN([minimal_macosx])
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@ -29,6 +29,7 @@ SOURCES_dc1394 = dc1394.c
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SOURCES_access_fake = fake.c
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SOURCES_pvr = pvr.c videodev2.h
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SOURCES_v4l = v4l.c videodev_mjpeg.h
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SOURCES_qtcapture = qtcapture.m
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SOURCES_cdda = \
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cdda.c \
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vcd/cdrom.c \
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@ -0,0 +1,362 @@
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/*****************************************************************************
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* qtcapture.m: qtkit (Mac OS X) based capture module
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*****************************************************************************
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* Copyright (C) 2008 the VideoLAN team
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*
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* Authors: Pierre d'Herbemont <pdherbemont@videolan.org>
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*
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*****************************************************************************
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2 of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <vlc/vlc.h>
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#include <vlc_plugin.h>
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#include <vlc_input.h>
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#include <vlc_vout.h>
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#include <vlc_demux.h>
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#import <QTKit/QTKit.h>
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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static int Open( vlc_object_t *p_this );
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static void Close( vlc_object_t *p_this );
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static int Demux( demux_t *p_demux );
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static int Control( demux_t *, int, va_list );
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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vlc_module_begin();
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set_shortname( N_("Quicktime Capture") );
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set_description( N_("Quicktime Capture") );
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set_category( CAT_INPUT );
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set_subcategory( SUBCAT_INPUT_ACCESS );
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add_shortcut( "qtcapture" );
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set_capability( "access_demux", 10 );
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set_callbacks( Open, Close );
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vlc_module_end();
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/*****************************************************************************
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* QTKit Bridge
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*****************************************************************************/
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@interface VLCDecompressedVideoOutput : QTCaptureDecompressedVideoOutput
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{
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CVImageBufferRef currentImageBuffer;
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}
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- (id)init;
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- (void)outputVideoFrame:(CVImageBufferRef)videoFrame withSampleBuffer:(QTSampleBuffer *)sampleBuffer fromConnection:(QTCaptureConnection *)connection;
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- (BOOL)copyCurrentFrameToBuffer:(void *)buffer;
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@end
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/* Apple sample code */
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@implementation VLCDecompressedVideoOutput : QTCaptureDecompressedVideoOutput
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- (id)init
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{
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if( self = [super init] )
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{
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currentImageBuffer = nil;
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}
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return self;
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}
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- (void)dealloc
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{
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@synchronized (self) {
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CVBufferRelease(currentImageBuffer);
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currentImageBuffer = nil;
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}
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[super dealloc];
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}
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- (void)outputVideoFrame:(CVImageBufferRef)videoFrame withSampleBuffer:(QTSampleBuffer *)sampleBuffer fromConnection:(QTCaptureConnection *)connection
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{
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// Store the latest frame
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// This must be done in a @synchronized block because this delegate method is not called on the main thread
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CVImageBufferRef imageBufferToRelease;
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CVBufferRetain(videoFrame);
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@synchronized (self) {
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imageBufferToRelease = currentImageBuffer;
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currentImageBuffer = videoFrame;
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}
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CVBufferRelease(imageBufferToRelease);
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}
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- (BOOL)copyCurrentFrameToBuffer:(void *)buffer
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{
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CVImageBufferRef imageBuffer;
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@synchronized (self) {
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if(!currentImageBuffer) return NO;
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imageBuffer = CVBufferRetain(currentImageBuffer);
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}
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CVPixelBufferLockBaseAddress(imageBuffer, 0);
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void * pixels = CVPixelBufferGetBaseAddress(imageBuffer);
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memcpy( buffer, pixels, CVPixelBufferGetBytesPerRow(imageBuffer) * CVPixelBufferGetHeight(imageBuffer) );
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CVPixelBufferUnlockBaseAddress(imageBuffer, 0);
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CVBufferRelease(imageBuffer);
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return YES;
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}
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@end
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struct demux_sys_t {
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QTCaptureSession * session;
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VLCDecompressedVideoOutput * output;
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int height, width;
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es_out_id_t * p_es_video;
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};
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int qtchroma_to_fourcc( int i_qt )
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{
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static struct
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{
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unsigned int i_qt;
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int i_fourcc;
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} qtchroma_to_fourcc[] =
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{
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/* Raw data types */
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{ k422YpCbCr8CodecType, VLC_FOURCC('U','Y','V','Y') },
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{ 0, 0 }
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};
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int i;
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for( i = 0; qtchroma_to_fourcc[i].i_qt; i++ )
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{
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if( qtchroma_to_fourcc[i].i_qt == i_qt )
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return qtchroma_to_fourcc[i].i_fourcc;
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}
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return 0;
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}
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/*****************************************************************************
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* Open:
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*****************************************************************************/
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static int Open( vlc_object_t *p_this )
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{
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demux_t *p_demux = (demux_t*)p_this;
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demux_sys_t *p_sys = NULL;
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es_format_t fmt;
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int i;
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int i_width;
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int i_height;
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int i_aspect;
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int result = 0;
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/* Set up p_demux */
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p_demux->pf_demux = Demux;
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p_demux->pf_control = Control;
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p_demux->info.i_update = 0;
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p_demux->info.i_title = 0;
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p_demux->info.i_seekpoint = 0;
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NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
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msg_Dbg( p_demux, "QTCapture Probed" );
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p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
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if( !p_sys ) return VLC_ENOMEM;
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memset( p_sys, 0, sizeof( demux_sys_t ) );
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memset( &fmt, 0, sizeof( es_format_t ) );
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QTCaptureDeviceInput * input = nil;
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QTCaptureSession * session = nil;
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VLCDecompressedVideoOutput * output = nil;
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QTCaptureDevice * device = [QTCaptureDevice defaultInputDeviceWithMediaType: QTMediaTypeVideo];
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if( !device )
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{
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msg_Err( p_demux, "Can't open any Video device" );
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goto error;
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}
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if( ![device open: nil /* FIXME */] )
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{
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msg_Err( p_demux, "Can't open any Video device" );
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goto error;
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}
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input = [[QTCaptureDeviceInput alloc] initWithDevice: device];
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if( !device )
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{
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msg_Err( p_demux, "Can't create a capture session" );
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goto error;
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}
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output = [[VLCDecompressedVideoOutput alloc] init];
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session = [[QTCaptureSession alloc] init];
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bool ret = [session addInput:input error:nil /* FIXME */];
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if( !ret )
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{
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msg_Err( p_demux, "Can't add the video device as input" );
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goto error;
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}
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ret = [session addOutput:output error:nil /* FIXME */];
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if( !ret )
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{
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msg_Err( p_demux, "Can't get any output output" );
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goto error;
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}
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[session startRunning];
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int qtchroma = [[[device formatDescriptions] objectAtIndex: 0] formatType]; /* FIXME */
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int chroma = qtchroma_to_fourcc( qtchroma );
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if( !chroma )
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{
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msg_Err( p_demux, "Unknown qt chroma %4.4s provided by camera", (char*)&qtchroma );
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goto error;
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}
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es_format_Init( &fmt, VIDEO_ES, chroma );
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NSSize size = [[device attributeForKey:QTFormatDescriptionVideoEncodedPixelsSizeAttribute] sizeValue];
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p_sys->width = fmt.video.i_width = 640;/* size.width; FIXME */
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p_sys->height = fmt.video.i_height = 480;/* size.height; FIXME */
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msg_Err( p_demux, "added new video es %4.4s %dx%d",
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(char*)&fmt.i_codec, fmt.video.i_width, fmt.video.i_height );
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p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
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p_sys->output = [output retain];
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p_sys->session = [session retain];
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[input release];
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[output release];
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[session release];
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[pool release];
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msg_Dbg( p_demux, "QTCapture: We have a video device ready!" );
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return VLC_SUCCESS;
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error:
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[input release];
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[session release];
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[input release];
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[output release];
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[pool release];
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free( p_sys );
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return VLC_EGENERIC;
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}
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/*****************************************************************************
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* Close:
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*****************************************************************************/
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static void Close( vlc_object_t *p_this )
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{
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NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
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demux_t *p_demux = (demux_t*)p_this;
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demux_sys_t *p_sys = p_demux->p_sys;
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[p_sys->output release];
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[p_sys->session release];
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free( p_sys );
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[pool release];
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}
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/*****************************************************************************
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* Demux:
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*****************************************************************************/
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static int Demux( demux_t *p_demux )
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{
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demux_sys_t *p_sys = p_demux->p_sys;
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block_t *p_block;
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p_block = block_New( p_demux, p_sys->width *
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p_sys->height * 2 /* FIXME */ );
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if( !p_block )
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{
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msg_Err( p_demux, "cannot get block" );
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return 0;
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}
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NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
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if( ![p_sys->output copyCurrentFrameToBuffer: p_block->p_buffer] )
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{
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/* Nothing to display yet, just forget */
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block_Release( p_block );
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[pool release];
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return 1;
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}
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p_block->i_pts = mdate(); /* FIXME */
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es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
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es_out_Send( p_demux->out, p_sys->p_es_video, p_block );
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[pool release];
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return 1;
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}
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/*****************************************************************************
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* Control:
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*****************************************************************************/
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static int Control( demux_t *p_demux, int i_query, va_list args )
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{
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bool *pb;
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int64_t *pi64;
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switch( i_query )
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{
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/* Special for access_demux */
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case DEMUX_CAN_PAUSE:
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case DEMUX_CAN_SEEK:
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case DEMUX_SET_PAUSE_STATE:
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case DEMUX_CAN_CONTROL_PACE:
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pb = (bool*)va_arg( args, bool * );
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*pb = false;
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return VLC_SUCCESS;
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case DEMUX_GET_PTS_DELAY:
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pi64 = (int64_t*)va_arg( args, int64_t * );
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*pi64 = (int64_t)DEFAULT_PTS_DELAY;
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return VLC_SUCCESS;
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case DEMUX_GET_TIME:
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pi64 = (int64_t*)va_arg( args, int64_t * );
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*pi64 = mdate();
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return VLC_SUCCESS;
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/* TODO implement others */
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default:
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return VLC_EGENERIC;
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}
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return VLC_EGENERIC;
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}
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