#include "dshow_capture.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"
#include "libavformat/internal.h"
#include "libavformat/riff.h"
#include "avdevice.h"
#include "libavcodec/raw.h"

Macros
#define	OFFSET(x) offsetof(struct dshow_ctx, x)

#define	DEC AV_OPT_FLAG_DECODING_PARAM

Functions
static enum AVPixelFormat	dshow_pixfmt (DWORD biCompression, WORD biBitCount)

static int	dshow_read_close (AVFormatContext *s)

static char *	dup_wchar_to_utf8 (wchar_t *w)

static int	shall_we_drop (AVFormatContext *s, int index, enum dshowDeviceType devtype)

static void	callback (void priv_data, int index, uint8_t buf, int buf_size, int64_t time, enum dshowDeviceType devtype)

static int	dshow_cycle_devices (AVFormatContext avctx, ICreateDevEnum devenum, enum dshowDeviceType devtype, enum dshowSourceFilterType sourcetype, IBaseFilter **pfilter)
	Cycle through available devices using the device enumerator devenum, retrieve the device with type specified by devtype and return the pointer to the object found in *pfilter.

static void	dshow_cycle_formats (AVFormatContext avctx, enum dshowDeviceType devtype, IPin pin, int *pformat_set)
	Cycle through available formats using the specified pin, try to set parameters specified through AVOptions and if successful return 1 in *pformat_set.

static int	dshow_set_audio_buffer_size (AVFormatContext avctx, IPin pin)
	Set audio device buffer size in milliseconds (which can directly impact latency, depending on the device).

void	dshow_show_filter_properties (IBaseFilter device_filter, AVFormatContext avctx)
	Pops up a user dialog allowing them to adjust properties for the given filter, if possible.

static int	dshow_cycle_pins (AVFormatContext avctx, enum dshowDeviceType devtype, enum dshowSourceFilterType sourcetype, IBaseFilter device_filter, IPin **ppin)
	Cycle through available pins using the device_filter device, of type devtype, retrieve the first output pin and return the pointer to the object found in *ppin.

static int	dshow_list_device_options (AVFormatContext avctx, ICreateDevEnum devenum, enum dshowDeviceType devtype, enum dshowSourceFilterType sourcetype)
	List options for device with type devtype, source filter type sourcetype.

static int	dshow_open_device (AVFormatContext avctx, ICreateDevEnum devenum, enum dshowDeviceType devtype, enum dshowSourceFilterType sourcetype)

static enum AVCodecID	waveform_codec_id (enum AVSampleFormat sample_fmt)

static enum AVSampleFormat	sample_fmt_bits_per_sample (int bits)

static int	dshow_add_device (AVFormatContext *avctx, enum dshowDeviceType devtype)

static int	parse_device_name (AVFormatContext *avctx)

static int	dshow_read_header (AVFormatContext *avctx)

static int	dshow_check_event_queue (IMediaEvent *media_event)
	Checks media events from DirectShow and returns -1 on error or EOF.

static int	dshow_read_packet (AVFormatContext s, AVPacket pkt)

Variables
static const AVOption	options []

static const AVClass	dshow_class

AVInputFormat	ff_dshow_demuxer

Macro Definition Documentation

#define OFFSET ( x ) offsetof(struct dshow_ctx, x)

Definition at line 1174 of file dshow.c.

#define DEC AV_OPT_FLAG_DECODING_PARAM

Definition at line 1175 of file dshow.c.

Function Documentation

static enum AVPixelFormat dshow_pixfmt	(	DWORD	biCompression,
		WORD	biBitCount
	)

static

Definition at line 32 of file dshow.c.

Referenced by dshow_add_device(), and dshow_cycle_formats().

static int dshow_read_close ( AVFormatContext * s )

static

Definition at line 56 of file dshow.c.

Referenced by dshow_read_header().

static char* dup_wchar_to_utf8 ( wchar_t * w )

static

Definition at line 130 of file dshow.c.

Referenced by dshow_cycle_pins().

static int shall_we_drop	(	AVFormatContext *	s,
		int	index,
		enum dshowDeviceType	devtype
	)

static

Definition at line 140 of file dshow.c.

Referenced by callback().

static void callback	(	void *	priv_data,
		int	index,
		uint8_t *	buf,
		int	buf_size,
		int64_t	time,
		enum dshowDeviceType	devtype
	)

static

Definition at line 159 of file dshow.c.

Referenced by av_log_set_callback(), av_opt_query_ranges(), dshow_open_device(), libAVFilter_Setup(), and libspeex_decode_init().

static int dshow_cycle_devices	(	AVFormatContext *	avctx,
		ICreateDevEnum *	devenum,
		enum dshowDeviceType	devtype,
		enum dshowSourceFilterType	sourcetype,
		IBaseFilter **	pfilter
	)

static

Cycle through available devices using the device enumerator devenum, retrieve the device with type specified by devtype and return the pointer to the object found in *pfilter.

If pfilter is NULL, list all device names.

Definition at line 205 of file dshow.c.

Referenced by dshow_list_device_options(), dshow_open_device(), and dshow_read_header().

static void dshow_cycle_formats	(	AVFormatContext *	avctx,
		enum dshowDeviceType	devtype,
		IPin *	pin,
		int *	pformat_set
	)

static

Cycle through available formats using the specified pin, try to set parameters specified through AVOptions and if successful return 1 in *pformat_set.

If pformat_set is NULL, list all pin capabilities.

Definition at line 316 of file dshow.c.

Referenced by dshow_cycle_pins().

static int dshow_set_audio_buffer_size	(	AVFormatContext *	avctx,
		IPin *	pin
	)

static

Set audio device buffer size in milliseconds (which can directly impact latency, depending on the device).

Definition at line 463 of file dshow.c.

Referenced by dshow_cycle_pins().

void dshow_show_filter_properties	(	IBaseFilter *	device_filter,
		AVFormatContext *	avctx
	)

Pops up a user dialog allowing them to adjust properties for the given filter, if possible.

Definition at line 507 of file dshow.c.

Referenced by dshow_cycle_pins(), and dshow_try_setup_crossbar_options().

static int dshow_cycle_pins	(	AVFormatContext *	avctx,
		enum dshowDeviceType	devtype,
		enum dshowSourceFilterType	sourcetype,
		IBaseFilter *	device_filter,
		IPin **	ppin
	)

static

Cycle through available pins using the device_filter device, of type devtype, retrieve the first output pin and return the pointer to the object found in *ppin.

If ppin is NULL, cycle through all pins listing audio/video capabilities.

Definition at line 557 of file dshow.c.

Referenced by dshow_list_device_options(), and dshow_open_device().

static int dshow_list_device_options	(	AVFormatContext *	avctx,
		ICreateDevEnum *	devenum,
		enum dshowDeviceType	devtype,
		enum dshowSourceFilterType	sourcetype
	)

static

List options for device with type devtype, source filter type sourcetype.

Parameters

devenum device enumerator used for accessing the device

Definition at line 702 of file dshow.c.

Referenced by dshow_read_header().

static int dshow_open_device	(	AVFormatContext *	avctx,
		ICreateDevEnum *	devenum,
		enum dshowDeviceType	devtype,
		enum dshowSourceFilterType	sourcetype
	)

static

Definition at line 719 of file dshow.c.

Referenced by dshow_read_header().

static enum AVCodecID waveform_codec_id ( enum AVSampleFormat sample_fmt )

static

Definition at line 808 of file dshow.c.

Referenced by dshow_add_device().

static enum AVSampleFormat sample_fmt_bits_per_sample ( int bits )

static

Definition at line 818 of file dshow.c.

Referenced by dshow_add_device().

static int dshow_add_device	(	AVFormatContext *	avctx,
		enum dshowDeviceType	devtype
	)

static

Definition at line 829 of file dshow.c.

Referenced by dshow_read_header().

static int parse_device_name ( AVFormatContext * avctx )

static

Definition at line 924 of file dshow.c.

Referenced by dshow_read_header().

static int dshow_read_header ( AVFormatContext * avctx )

static

Definition at line 961 of file dshow.c.

static int dshow_check_event_queue ( IMediaEvent * media_event )

static

Checks media events from DirectShow and returns -1 on error or EOF.

Also purges all events that might be in the event queue to stop the trigger of event notification.

Definition at line 1129 of file dshow.c.

Referenced by dshow_read_packet().

static int dshow_read_packet	(	AVFormatContext *	s,
		AVPacket *	pkt
	)

static

Definition at line 1144 of file dshow.c.

Variable Documentation

const AVOption options[]

static

Definition at line 1176 of file dshow.c.

const AVClass dshow_class

static

Initial value:

= {
    .class_name = "dshow indev",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
    .category   = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
}

Definition at line 1217 of file dshow.c.

AVInputFormat ff_dshow_demuxer

Initial value:

= {
    .name           = "dshow",
    .long_name      = NULL_IF_CONFIG_SMALL("DirectShow capture"),
    .priv_data_size = sizeof(struct dshow_ctx),
    .read_header    = dshow_read_header,
    .read_packet    = dshow_read_packet,
    .read_close     = dshow_read_close,
    .flags          = AVFMT_NOFILE,
    .priv_class     = &dshow_class,
}

Definition at line 1225 of file dshow.c.

Macros

Functions

Variables

Macro Definition Documentation

Function Documentation

Variable Documentation