RaspiVidYUV.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <memory.h>
#include <sysexits.h>
#include "bcm_host.h"
#include "interface/vcos/vcos.h"
#include "interface/mmal/mmal.h"
#include "interface/mmal/mmal_logging.h"
#include "interface/mmal/mmal_buffer.h"
#include "interface/mmal/util/mmal_util.h"
#include "interface/mmal/util/mmal_util_params.h"
#include "interface/mmal/util/mmal_default_components.h"
#include "interface/mmal/util/mmal_connection.h"
#include "RaspiCamControl.h"
#include "RaspiPreview.h"
#include "RaspiCLI.h"
#include <semaphore.h>

Classes
struct	PORT_USERDATA
struct	RASPIVIDYUV_STATE_S

Macros
#define	_GNU_SOURCE
#define	VERSION_STRING   "v1.3.12"
#define	MMAL_CAMERA_PREVIEW_PORT   0
#define	MMAL_CAMERA_VIDEO_PORT   1
#define	MMAL_CAMERA_CAPTURE_PORT   2
#define	VIDEO_FRAME_RATE_NUM   30
#define	VIDEO_FRAME_RATE_DEN   1
#define	VIDEO_OUTPUT_BUFFERS_NUM   3
	Video render needs at least 2 buffers.
#define	WAIT_METHOD_NONE   0
#define	WAIT_METHOD_TIMED   1
	Cycle between capture and pause for times specified.
#define	WAIT_METHOD_KEYPRESS   2
	Switch between capture and pause on keypress.
#define	WAIT_METHOD_SIGNAL   3
	Switch between capture and pause on signal.
#define	WAIT_METHOD_FOREVER   4
	Run/record forever.
#define	CommandHelp   0
	Command ID's and Structure defining our command line options.
#define	CommandWidth   1
#define	CommandHeight   2
#define	CommandOutput   3
#define	CommandVerbose   4
#define	CommandTimeout   5
#define	CommandDemoMode   6
#define	CommandFramerate   7
#define	CommandTimed   8
#define	CommandSignal   9
#define	CommandKeypress   10
#define	CommandInitialState   11
#define	CommandCamSelect   12
#define	CommandSettings   13
#define	CommandSensorMode   14

Typedefs
typedef struct RASPIVIDYUV_STATE_S	RASPIVIDYUV_STATE

Functions
int	mmal_status_to_int (MMAL_STATUS_T status)
int	main (int argc, const char **argv)

Variables
const int	ABORT_INTERVAL = 100
	Interval at which we check for an failure abort during capture.
FILE *	stderr
FILE *	stdout

Detailed Description

Command line program to capture a camera video stream and save file as uncompressed YUV420 data Also optionally display a preview/viewfinder of current camera input.

Date

7th Jan 2014 : James Hughes

Description

2 components are created; camera and preview. Camera component has three ports, preview, video and stills. Preview is connected using standard mmal connections, the video output is written straight to the file in YUV 420 format via the requisite buffer callback. Still port is not used

We use the RaspiCamControl code to handle the specific camera settings. We use the RaspiPreview code to handle the generic preview

Macro Definition Documentation

#define WAIT_METHOD_NONE   0

Capture/Pause switch method Simply capture for time specified

Function Documentation

int main	(	int	argc,
		const char **	argv
	)

main

int mmal_status_to_int

(

MMAL_STATUS_T

status

)

Convert a MMAL status return value to a simple boolean of success ALso displays a fault if code is not success

Parameters

status

The error code to convert

Returns

0 if status is sucess, 1 otherwise