Add AVFoundation input device.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Changelog

@@ -16,6 +16,7 @@ version <next>:
 - support decoding 16-bit RLE SGI images
 - GDI screen grabbing for Windows
 - alternative rendition support for HTTP Live Streaming
+- AVFoundation input device
 
 
 version 2.2:

MAINTAINERS

@@ -303,6 +303,7 @@ libavdevice
     libavdevice/avdevice.h
 
 
+  avfoundation.m                        Thilo Borgmann
   dshow.c                               Roger Pack (CC rogerdpack@gmail.com)
   fbdev_enc.c                           Lukasz Marek
   gdigrab.c                             Roger Pack (CC rogerdpack@gmail.com)

configure

@@ -2366,6 +2366,8 @@ xwma_demuxer_select="riffdec"
 # indevs / outdevs
 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
 alsa_outdev_deps="alsa_asoundlib_h"
+avfoundation_indev_extralibs="-framework AVFoundation -framework CoreMedia"
+avfoundation_indev_select="avfoundation"
 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
 caca_outdev_deps="libcaca"
 decklink_outdev_deps="decklink pthreads"
@@ -4579,6 +4581,7 @@ for func in $MATH_FUNCS; do
 done
 
 # these are off by default, so fail if requested and not available
+enabled avfoundation_indev && { check_header_oc AVFoundation/AVFoundation.h || disable avfoundation_indev; }
 enabled avisynth          && { { check_lib2 "windows.h" LoadLibrary; } ||
                                { check_lib2 "dlfcn.h" dlopen -ldl; } ||
                                die "ERROR: LoadLibrary/dlopen not found for avisynth"; }

doc/indevs.texi

@@ -51,6 +51,36 @@ ffmpeg -f alsa -i hw:0 alsaout.wav
 For more information see:
 @url{http://www.alsa-project.org/alsa-doc/alsa-lib/pcm.html}
 
+@section avfoundation
+
+AVFoundation input device.
+
+AVFoundation is the currently recommended framework by Apple for streamgrabbing on OSX >= 10.7 as well as on iOS.
+The older QTKit framework has been marked deprecated since OSX version 10.7.
+
+The filename passed as input is parsed to contain either a device name or index.
+The device index can also be given by using -video_device_index.
+A given device index will override any given device name.
+If the desired device consists of numbers only, use -video_device_index to identify it.
+The default device will be chosen if an empty string  or the device name "default" is given.
+The available devices can be enumerated by using -list_devices.
+
+@example
+ffmpeg -f avfoundation -i "0" out.mpg
+@end example
+
+@example
+ffmpeg -f avfoundation -video_device_index 0 -i "" out.mpg
+@end example
+
+@example
+ffmpeg -f avfoundation -i "default" out.mpg
+@end example
+
+@example
+ffmpeg -f avfoundation -list_devices true -i ""
+@end example
+
 @section bktr
 
 BSD video input device.

libavdevice/Makefile

@@ -15,6 +15,7 @@ OBJS-$(CONFIG_ALSA_INDEV)                += alsa-audio-common.o \
                                             alsa-audio-dec.o timefilter.o
 OBJS-$(CONFIG_ALSA_OUTDEV)               += alsa-audio-common.o \
                                             alsa-audio-enc.o
+OBJS-$(CONFIG_AVFOUNDATION_INDEV)        += avfoundation.o
 OBJS-$(CONFIG_BKTR_INDEV)                += bktr.o
 OBJS-$(CONFIG_CACA_OUTDEV)               += caca.o
 OBJS-$(CONFIG_DECKLINK_OUTDEV)           += decklink_enc.o decklink_enc_c.o

libavdevice/alldevices.c

@@ -47,6 +47,7 @@ void avdevice_register_all(void)
 
     /* devices */
     REGISTER_INOUTDEV(ALSA,             alsa);
+    REGISTER_INDEV   (AVFOUNDATION,     avfoundation);
     REGISTER_INDEV   (BKTR,             bktr);
     REGISTER_OUTDEV  (CACA,             caca);
     REGISTER_OUTDEV  (DECKLINK,         decklink);