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CommandCam.cpp
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CommandCam.cpp
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// CommandCam - A command line image grabber
// Copyright (C) 2012-2013 Ted Burke
// Copyright (C) 2016 Matjaz Rihtar
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program (see the file "COPYING").
// If not, see <http://www.gnu.org/licenses/>.
//
// Website: https://batchloaf.wordpress.com/commandcam/
// https://github.com/mrihtar/CommandCam
//
// To compile using the MSVC++ compiler:
// cl CommandCam.cpp ole32.lib strmiids.lib oleaut32.lib
// To compile using the MinGW compiler:
// g++ CommandCam.cpp -lole32 -lstrmiids -loleaut32 -static -o CommandCam.exe
//
// Version 2.6, last modified 16-Nov-2016
//
#ifdef __MINGW32__
#define STRSAFE_NO_DEPRECATE // MinGW: ignore strcpy/sprintf warnings
#pragma GCC diagnostic ignored "-Wnarrowing"
#define strcasecmp strcmpi
#else
#pragma warning (disable:4995) // W3: name was marked as #pragma deprecated
#pragma warning (disable:4996) // W3: deprecated declaration (_CRT_SECURE_NO_WARNINGS)
#pragma warning (disable:4711) // W1: function selected for inline expansion
#pragma warning (disable:4710) // W4: function not inlined
#pragma warning (disable:4127) // W4: conditional expression is constant
#pragma warning (disable:4820) // W4: bytes padding added
#pragma warning (disable:4668) // W4: symbol not defined as a macro
#pragma warning (disable:4365) // W4: conversion -> signed/unsigned mismatch
#pragma warning (disable:4242) // W4: conversion -> possible loss of data
#pragma warning (disable:4244) // W3,W4: conversion -> possible loss of data
#pragma warning (disable:4917) // W1: GUID can only be associated with a class
#pragma warning (disable:4309) // W2: truncation of constant value
#define strcasecmp _stricmp
#endif
#include <math.h>
// DirectShow header file
#include <dshow.h>
// Missing from amvideo.h
#ifndef SIZE_PREHEADER
#define SIZE_PREHEADER (FIELD_OFFSET(VIDEOINFOHEADER,bmiHeader))
#endif
#ifndef HEADER
#define HEADER(pVideoInfo) (&(((VIDEOINFOHEADER *)(pVideoInfo))->bmiHeader))
#endif
// Some common Webcam compression formats
#define sRGB 0x00000000 // RGB888, 24 bits (no compression)
#define AYUV 0x56555941 // 4:4:4, 32 bits (no downsampling of chroma channels)
#define YUY2 0x32595559 // 4:2:2, 16 bits (2:1 hor. downsamp.)
#define YUYV 0x56595559 // 4:2:2, 16 bits (2:1 hor. downsamp., same as YUY2)
#define YVYU 0x55595659 // 4:2:2, 16 bits (2:1 hor. downsamp.)
#define UYVY 0x59565955 // 4:2:2, 16 bits (2:1 hor. downsamp., reversed YUY2)
#define IMC1 0x31434D49 // 4:2:0, 16 bits (2:1 hor. downsamp., 2:1 vert. downsamp., planar)
#define IMC3 0x33434D49 // 4:2:0, 16 bits (2:1 hor. downsamp., 2:1 vert. downsamp., planar, reversed IMC1)
#define IMC2 0x32434D49 // 4:2:0, 12 bits (2:1 hor. downsamp., 2:1 vert. downsamp., planar)
#define IMC4 0x34434D49 // 4:2:0, 12 bits (2:1 hor. downsamp., 2:1 vert. downsamp., planar)
#define YV12 0x32315659 // 4:2:0, 12 bits (2:1 hor. downsamp., 2:1 vert. downsamp., planar)
#define NV12 0x3231564E // 4:2:0, 12 bits (2:1 hor. downsamp., 2:1 vert. downsamp., planar)
#define I420 0x30323449 // 4:2:0, 12 bits (2:1 hor. downsamp., 2:1 vert. downsamp., planar, reversed YV12)
#define IYUV 0x56555949 // 4:2:0, 12 bits (2:1 hor. downsamp., 2:1 vert. downsamp., planar, same as I420)
#define MJPG 0x47504A4D // 24 bits
#ifdef __MINGW32__
#include <qedit.h>
#else
// This is a workaround for the missing header
// file qedit.h which seems to be absent from the
// Windows SDK versions 7.0 and 7.1.
// To use the items defined in this dll, the
// DexterLib namespace must be specified.
// The items in question are:
//
// DexterLib::_AMMediaType
// DexterLib::ISampleGrabber
// DexterLib::IID_ISampleGrabber
//
#import "qedit.dll" raw_interfaces_only named_guids
#endif
// For some reason, these are not included in the
// DirectShow headers. However, they are exported
// by strmiids.lib, so I'm just declaring them
// here as extern.
EXTERN_C const CLSID CLSID_NullRenderer;
EXTERN_C const CLSID CLSID_SampleGrabber;
// DirectShow objects
HRESULT hr;
ICreateDevEnum *pDevEnum = NULL;
IEnumMoniker *pEnum = NULL;
IMoniker *pMoniker = NULL;
IPropertyBag *pPropBag = NULL;
IGraphBuilder *pGraph = NULL;
ICaptureGraphBuilder2 *pBuilder = NULL;
IBaseFilter *pCap = NULL;
IEnumPins *pEnumPins = NULL;
IAMStreamConfig *pConfig = NULL;
IBaseFilter *pSampleGrabberFilter = NULL;
#ifdef __MINGW32__
ISampleGrabber *pSampleGrabber = NULL;
#else
DexterLib::ISampleGrabber *pSampleGrabber = NULL;
#endif
IBaseFilter *pNullRenderer = NULL;
IMediaControl *pMediaControl = NULL;
char *imgBuffer = NULL;
char *rgbBuffer = NULL;
// YUV color conversions
// - Recommendation ITU-R BT.601 (CCIR 601, older, SDTV)
// - Recommendation ITU-R BT.709 (newer, HDTV)
int colors = 601; // Default: BT.601 color conversion
// Print error message and exit program with specified error code
void exit_message(const char* error_message, int error)
{
// Print an error message
fprintf(stderr, error_message);
// Clean up DirectShow / COM stuff
if (rgbBuffer != NULL) delete[] rgbBuffer;
if (imgBuffer != NULL) delete[] imgBuffer;
if (pMediaControl != NULL) pMediaControl->Release();
if (pNullRenderer != NULL) pNullRenderer->Release();
if (pSampleGrabber != NULL) pSampleGrabber->Release();
if (pSampleGrabberFilter != NULL)
pSampleGrabberFilter->Release();
if (pConfig != NULL) pConfig->Release();
if (pEnumPins != NULL) pEnumPins->Release();
if (pCap != NULL) pCap->Release();
if (pBuilder != NULL) pBuilder->Release();
if (pGraph != NULL) pGraph->Release();
if (pPropBag != NULL) pPropBag->Release();
if (pMoniker != NULL) pMoniker->Release();
if (pEnum != NULL) pEnum->Release();
if (pDevEnum != NULL) pDevEnum->Release();
CoUninitialize();
// Exit the program
exit(error);
} // exit_message
// Round half up if positive, round half down if negative (= round to nearest)
// (round is missing from Microsoft C)
int xround(double d)
{
int i;
if (d > 0) i = (int)floor(d + 0.50000000000001);
else i = (int)ceil(d - 0.50000000000001);
return i;
} // xround
// Clip color value to [0, 255]
char clip(int value)
{
if (value < 0) return 0;
else if (value > 255) return 255;
else return value;
} // clip
// Decode YUY2 frame buffer to RGB
// YUY2 = 4:2:2, 16 bits (2:1 hor. downsamp.)
void yuy2_rgb(long width, long height, long *rgbBufferSize)
{
int y1, u, y2, v;
int c, d, e;
*rgbBufferSize = width * height * 3;
// Allocate buffer for RGB image
rgbBuffer = new char[*rgbBufferSize];
if (!rgbBuffer)
exit_message("Could not allocate data buffer for RGB image\n", 44);
char *imgP = imgBuffer;
// Windows bitmap rows are upside down!
char *rgbP = rgbBuffer + *rgbBufferSize;
for (int ii = 0; ii < height; ii++) { // y
rgbP -= width * 3;
for (int jj = 0; jj < width/2; jj++) { // x
y1 = imgP[0] & 0xFF;
u = imgP[1] & 0xFF;
y2 = imgP[2] & 0xFF;
v = imgP[3] & 0xFF;
imgP += 4;
c = y1 - 16; // luma
d = u - 128; // Cb
e = v - 128; // Cr
if (colors == 601) { // BT.601
rgbP[2] = clip(xround(1.16438356 * c + 1.59602679 * e)); // red
rgbP[1] = clip(xround(1.16438356 * c - 0.39176229 * d - 0.81296765 * e)); // green
rgbP[0] = clip(xround(1.16438356 * c + 2.01723214 * d )); // blue
}
else { // BT.709
rgbP[2] = clip(xround(1.16438356 * c + 1.79274107 * e)); // red
rgbP[1] = clip(xround(1.16438356 * c - 0.21324861 * d - 0.53290933 * e)); // green
rgbP[0] = clip(xround(1.16438356 * c + 2.11240179 * d )); // blue
}
c = y2 - 16;
if (colors == 601) { // BT.601
rgbP[5] = clip(xround(1.16438356 * c + 1.59602679 * e)); // red
rgbP[4] = clip(xround(1.16438356 * c - 0.39176229 * d - 0.81296765 * e)); // green
rgbP[3] = clip(xround(1.16438356 * c + 2.01723214 * d )); // blue
}
else { // BT.709
rgbP[5] = clip(xround(1.16438356 * c + 1.79274107 * e)); // red
rgbP[4] = clip(xround(1.16438356 * c - 0.21324861 * d - 0.53290933 * e)); // green
rgbP[3] = clip(xround(1.16438356 * c + 2.11240179 * d )); // blue
}
rgbP += 6;
} // for jj
rgbP -= width * 3;
} // for ii
} // yuy2_rgb
// Decode I420 frame buffer to RGB
// I420 = 4:2:0, 12 bits (2:1 hor. downsamp., 2:1 vert. downsamp., planar, reversed YV12)
void i420_rgb(long width, long height, long *rgbBufferSize)
{
int y, u, v, yp, up, vp;
int c, d, e;
*rgbBufferSize = width * height * 3;
// Allocate buffer for RGB image
rgbBuffer = new char[*rgbBufferSize];
if (!rgbBuffer)
exit_message("Could not allocate data buffer for RGB image\n", 45);
char *imgP = imgBuffer;
// Windows bitmap rows are upside down!
char *rgbP = rgbBuffer + *rgbBufferSize;
int tot_len = width * height;
for (int ii = 0; ii < height; ii++) { // y
rgbP -= width * 3;
for (int jj = 0; jj < width; jj++) { // x
yp = ii*width + jj;
up = (ii/2)*(width/2) + (jj/2) + tot_len;
vp = (ii/2)*(width/2) + (jj/2) + tot_len + (tot_len/4);
y = imgP[yp] & 0xFF;
u = imgP[up] & 0xFF;
v = imgP[vp] & 0xFF;
c = y - 16; // luma
d = u - 128; // Cb
e = v - 128; // Cr
if (colors == 601) { // BT.601
rgbP[2] = clip(xround(1.16438356 * c + 1.59602679 * e)); // red
rgbP[1] = clip(xround(1.16438356 * c - 0.39176229 * d - 0.81296765 * e)); // green
rgbP[0] = clip(xround(1.16438356 * c + 2.01723214 * d )); // blue
}
else { // BT.709
rgbP[2] = clip(xround(1.16438356 * c + 1.79274107 * e)); // red
rgbP[1] = clip(xround(1.16438356 * c - 0.21324861 * d - 0.53290933 * e)); // green
rgbP[0] = clip(xround(1.16438356 * c + 2.11240179 * d )); // blue
}
rgbP += 3;
} // for jj
rgbP -= width * 3;
} // for ii
} // i420_rgb
// Fix BITMAPINFOHEADER for 24 bit RGB .bmp
void fix_bmiHeader(VIDEOINFOHEADER *pVih, long bufferSize)
{
pVih->bmiHeader.biPlanes = 1;
pVih->bmiHeader.biBitCount = 24;
pVih->bmiHeader.biCompression = BI_RGB;
pVih->bmiHeader.biSizeImage = bufferSize; // can be 0 for RGB
pVih->bmiHeader.biXPelsPerMeter = 0;
pVih->bmiHeader.biYPelsPerMeter = 0;
pVih->bmiHeader.biClrUsed = 0;
pVih->bmiHeader.biClrImportant = 0;
} // fix_bmiHeader
const char jpeg_header[] = {
0xff, 0xd8, // SOI
0xff, 0xe0, // APP0
0x00, 0x10, // APP0 header size (including this field, but excluding preceding)
0x4a, 0x46, 0x49, 0x46, 0x00, // ID string 'JFIF\0'
0x01, 0x01, // version
0x00, // bits per type
0x00, 0x00, // X density
0x00, 0x00, // Y density
0x00, // X thumbnail size
0x00 // Y thumbnail size
};
const int dht_segment_size = 420;
const char dht_segment_head[] = { 0xFF, 0xC4, 0x01, 0xA2, 0x00 };
const char dht_segment_frag[] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
0x0a, 0x0b, 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
};
const char mjpeg_bits_dc_luminance[17] =
{ /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
const char mjpeg_val_dc[12] =
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
const char mjpeg_bits_ac_luminance[17] =
{ /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
const char mjpeg_val_ac_luminance[] = {
0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
0xf9, 0xfa
};
const char mjpeg_bits_ac_chrominance[17] =
{ /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
const char mjpeg_val_ac_chrominance[] = {
0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
0xf9, 0xfa
};
char *append(char *buf, const char *src, int size)
{
memcpy(buf, src, size);
return buf + size;
}
char *append_dht_segment(char *buf)
{
buf = append(buf, dht_segment_head, sizeof(dht_segment_head));
buf = append(buf, mjpeg_bits_dc_luminance + 1, 16);
buf = append(buf, dht_segment_frag, sizeof(dht_segment_frag));
buf = append(buf, mjpeg_val_dc, 12);
*(buf++) = 0x10;
buf = append(buf, mjpeg_bits_ac_luminance + 1, 16);
buf = append(buf, mjpeg_val_ac_luminance, 162);
*(buf++) = 0x11;
buf = append(buf, mjpeg_bits_ac_chrominance + 1, 16);
buf = append(buf, mjpeg_val_ac_chrominance, 162);
return buf;
}
// Add missing default huffman table to MJPG image header
void mjpeg_fix(long *imgBufferSize)
{
int skip = (imgBuffer[4] << 8) + imgBuffer[5] + 4;
if (*imgBufferSize < skip) return; // input is truncated
long tmpBufferSize = sizeof(jpeg_header) + dht_segment_size +
*imgBufferSize - skip;
char *tmpBuffer = new char[tmpBufferSize];
if (!tmpBuffer)
exit_message("Could not allocate data buffer for temp image\n", 46);
char *tmpP = tmpBuffer;
tmpP = append(tmpP, jpeg_header, sizeof(jpeg_header));
tmpP = append_dht_segment(tmpP);
tmpP = append(tmpP, imgBuffer + skip, *imgBufferSize - skip);
delete[] imgBuffer;
imgBuffer = tmpBuffer;
*imgBufferSize = tmpBufferSize;
} // mjpeg_fix
// Convert string to fourcc code
DWORD str2fourcc(char *sCode)
{
DWORD nCode = BI_RGB;
int len;
if (strcasecmp(sCode, "RGB") == 0) return BI_RGB;
else if (strcasecmp(sCode, "RGB888") == 0) return BI_RGB;
else if (strcasecmp(sCode, "sRGB") == 0) return BI_RGB;
else {
len = strlen(sCode);
if (len > 3) nCode |= (sCode[3] & 0xFF) << 24;
if (len > 2) nCode |= (sCode[2] & 0xFF) << 16;
if (len > 1) nCode |= (sCode[1] & 0xFF) << 8;
if (len > 0) nCode |= (sCode[0] & 0xFF) << 0;
}
return nCode;
} // str2fourcc
// Convert fourcc code to string
const char *fourcc2str(DWORD nCode)
{
static char sCode[5];
if (nCode == BI_RGB) return "RGB"; // RGB888, sRGB
else if (nCode == BI_BITFIELDS) return "RGB555";
else {
sCode[0] = (nCode >> 0) & 0xFF;
sCode[1] = (nCode >> 8) & 0xFF,
sCode[2] = (nCode >> 16) & 0xFF,
sCode[3] = (nCode >> 24) & 0xFF,
sCode[4] = 0;
}
return sCode;
} // fourcc2str
// Release the format block for a media type
void _FreeMediaType(AM_MEDIA_TYPE& mt)
{
if (mt.cbFormat != 0) {
CoTaskMemFree((PVOID)mt.pbFormat);
mt.cbFormat = 0;
mt.pbFormat = NULL;
}
if (mt.pUnk != NULL) {
// pUnk should not be used.
mt.pUnk->Release();
mt.pUnk = NULL;
}
} // _FreeMediaType
// Delete a media type structure that was allocated on the heap
void _DeleteMediaType(AM_MEDIA_TYPE *pmt)
{
if (pmt != NULL) {
_FreeMediaType(*pmt);
CoTaskMemFree(pmt);
}
} // _DeleteMediaType
// Convert string to uppercase
char *strupcase(char *s)
{
int len = strlen(s);
for (int ii = 0; ii < len; ii++)
s[ii] = toupper(s[ii]);
return s;
} // strupcase
int main(int argc, char **argv)
{
// Capture settings
int quiet = 0;
int snapshot_delay = 2000;
int show_preview_window = 0;
int list_devices = 0;
int details = 0;
int device_number = 1;
char device_name[256];
char filename[256];
bool fn_forced = false;
bool want_size = false;
int width = 0;
int height = 0;
bool want_fourcc = false;
DWORD fourcc = BI_RGB;
// Other variables
char char_buffer[256];
// Default device name and output filename
strcpy(device_name, "");
strcpy(filename, "capture.bmp");
// First check if output messages should be suppressed
for (int n = 1; n < argc; n++) {
// Check next command line argument
if (strcasecmp(argv[n], "/quiet") == 0) {
// Don't output any messages
quiet = 1;
}
}
// Set stdout as unbuffered
setvbuf(stdout, NULL, _IONBF, 0);
// Information message
if (!quiet) {
fprintf(stdout, "CommandCam 2.8 Copyright (c) 2016 Ted Burke, Matjaz Rihtar (Nov 17, 2016)\n");
fprintf(stdout, "https://batchloaf.wordpress.com, https://github.com/mrihtar/CommandCam\n");
fprintf(stdout, "\n");
}
// Parse command line arguments. Available options:
//
// /delay <DELAY_IN_MILLISECONDS>
// /filename <OUTPUT_FILENAME>
// /devnum <DEVICE_NUMBER>
// /devname <DEVICE_NAME>
// /size <WIDTH>x<HEIGHT>
// /fourcc <FOURCC>
// /colors <BT.601 | BT.709>
// /preview
// /devlist
// /details
// /quiet
//
int n = 1;
while (n < argc) {
// Process next command line argument
if (strcasecmp(argv[n], "/quiet") == 0) {
// This command line argument has already been
// processed above, so just ignore it now.
}
else if (strcasecmp(argv[n], "/preview") == 0) {
// Enable preview window
show_preview_window = 1;
}
else if (strcasecmp(argv[n], "/devlist") == 0) {
// Set flag to list devices rather than capture image
list_devices = 1;
}
else if (strcasecmp(argv[n], "/details") == 0) {
// Set flag to list devices with details rather than capture image
list_devices = 1;
details = 1;
}
else if (strcasecmp(argv[n], "/filename") == 0) {
// Set output filename to specified string
if (++n < argc) {
// Copy provided string into filename
strncpy(filename, argv[n], 255); filename[255] = '\0';
fn_forced = true;
}
else
exit_message("Error: no filename specified\n", 2);
}
else if (strcasecmp(argv[n], "/delay") == 0) {
// Set snapshot delay to specified value
if (++n < argc) snapshot_delay = atoi(argv[n]);
else exit_message("Error: no delay specified\n", 3);
if (snapshot_delay < 0)
exit_message("Error: invalid delay specified\n", 3);
}
else if (strcasecmp(argv[n], "/devnum") == 0) {
// Set device number to specified value
if (++n < argc) device_number = atoi(argv[n]);
else exit_message("Error: no device number specified\n", 4);
if (device_number <= 0)
exit_message("Error: invalid device number\n", 4);
}
else if (strcasecmp(argv[n], "/devname") == 0) {
// Set device name to specified value
if (++n < argc) {
// Copy provided string into device_name
strncpy(device_name, argv[n], 255); device_name[255] = '\0';
// Remember to choose by name rather than number
device_number = 0;
}
else
exit_message("Error: no device name specified\n", 5);
}
else if (strcasecmp(argv[n], "/size") == 0) {
// Set capture size to specified value
if (++n < argc) {
// Copy size specification into char buffer
strncpy(char_buffer, argv[n], 255); char_buffer[255] = '\0';
int rn = sscanf(char_buffer, "%dx%d", &width, &height);
if (rn != 2)
exit_message("Error: invalid size specified\n", 6);
want_size = true;
}
else exit_message("Error: no size specified\n", 6);
}
else if (strcasecmp(argv[n], "/fourcc") == 0) {
// Set desired fourcc to specified string
if (++n < argc) {
// Copy provided string into char buffer
strncpy(char_buffer, argv[n], 255); char_buffer[255] = '\0';
fourcc = str2fourcc(strupcase(char_buffer));
// Remember to check for desired fourcc
want_fourcc = true;
}
else
exit_message("Error: no fourcc specified\n", 7);
}
else if (strcasecmp(argv[n], "/colors") == 0) {
// Set desired color conversion standard
if (++n < argc) {
if (strcasecmp(argv[n], "bt.601") == 0)
colors = 601;
else if (strcasecmp(argv[n], "bt.709") == 0)
colors = 709;
else
exit_message("Error: invalid color standard specified\n", 8);
}
else
exit_message("Error: no color standard specified\n", 8);
}
else {
// Unknown command line argument
fprintf(stderr, "Unrecognized option: %s\n", argv[n]);
fprintf(stderr, "\n");
fprintf(stderr, "Available options:\n");
fprintf(stderr, " /delay <DELAY_IN_MILLISECONDS> (default: 2000 ms)\n");
fprintf(stderr, " /filename <OUTPUT_FILENAME> (default: capture.bmp)\n");
fprintf(stderr, " /devnum <DEVICE_NUMBER> (default: 1st in list)\n");
fprintf(stderr, " /devname <DEVICE_NAME>\n");
fprintf(stderr, " /size <WIDTH>x<HEIGHT> (default: 1st in list)\n");
fprintf(stderr, " /fourcc <FOURCC> (default: RGB)\n");
fprintf(stderr, " /colors <BT.601 | BT.709> (default: BT.601)\n");
fprintf(stderr, " /preview\n");
fprintf(stderr, " /devlist\n");
fprintf(stderr, " /details\n");
fprintf(stderr, " /quiet\n");
exit_message("", 1);
}
// Increment command line argument counter
n++;
}
// Intialise COM
hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);
if (hr != S_OK)
exit_message("Could not initialise COM\n", 9);
// Create filter graph
hr = CoCreateInstance(CLSID_FilterGraph, NULL,
CLSCTX_INPROC_SERVER, IID_IGraphBuilder,
(void**)&pGraph);
if (hr != S_OK)
exit_message("Could not create filter graph\n", 10);
// Create capture graph builder
hr = CoCreateInstance(CLSID_CaptureGraphBuilder2, NULL,
CLSCTX_INPROC_SERVER, IID_ICaptureGraphBuilder2,
(void **)&pBuilder);
if (hr != S_OK)
exit_message("Could not create capture graph builder\n", 11);
// Attach capture graph builder to graph
hr = pBuilder->SetFiltergraph(pGraph);
if (hr != S_OK)
exit_message("Could not attach capture graph builder to graph\n", 12);
// Create system device enumerator
hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL,
CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pDevEnum));
if (hr != S_OK)
exit_message("Could not create system device enumerator\n", 13);
// Video input device enumerator
hr = pDevEnum->CreateClassEnumerator(
CLSID_VideoInputDeviceCategory, &pEnum, 0);
if (hr != S_OK)
exit_message("No video devices found\n", 14);
// If the user has included the "/devlist" command line
// argument, just list available devices, then exit.
if (list_devices != 0) {
if (!quiet) fprintf(stdout, "Available capture devices:\n");
n = 0;
while (1) {
// Find next device
hr = pEnum->Next(1, &pMoniker, NULL);
if (hr == S_OK) {
// Increment device counter
n++;
// Get device name
hr = pMoniker->BindToStorage(0, 0, IID_PPV_ARGS(&pPropBag));
VARIANT var;
VariantInit(&var);
hr = pPropBag->Read(L"FriendlyName", &var, 0);
if (!quiet) fprintf(stdout, " %2d. %ls\n", n, var.bstrVal);
VariantClear(&var);
// If the user has included "/details" in addition to "/devlist"
// list pins and capabilites of this device
if (details) {
// Create base filter
hr = pMoniker->BindToObject(0, 0, IID_IBaseFilter, (void**)&pCap);
if (hr != S_OK)
continue;
hr = pCap->EnumPins(&pEnumPins);
if (hr != S_OK)
continue;
IPin *pPin = NULL;
while (pEnumPins->Next(1, &pPin, NULL) == S_OK) {
if (pPin) {
PIN_INFO PinInformation;
hr = pPin->QueryPinInfo(&PinInformation);
if (hr != S_OK)
exit_message("Could not get pin information\n", 15);
if (!quiet) fwprintf(stdout, L" Pin: %s", PinInformation.achName);
pConfig = NULL;
hr = pPin->QueryInterface(IID_IAMStreamConfig, (void**)&pConfig);
if (hr == S_OK) {
int count = 0; int size = 0;
hr = pConfig->GetNumberOfCapabilities(&count, &size);
if (hr != S_OK)
exit_message("\nCould not get number of capabilities\n", 16);
if (!quiet) fprintf(stdout, ", %d caps\n", count);
BYTE *pSCC = new BYTE[size];
for (int ii = 0; ii < count; ii++) {
AM_MEDIA_TYPE *pmt = NULL;
hr = pConfig->GetStreamCaps(ii, &pmt, pSCC);
if (hr != S_OK)
exit_message("Could not get stream capability\n", 17);
if (pmt->formattype == FORMAT_VideoInfo) {
VIDEOINFOHEADER *pVih = (VIDEOINFOHEADER *)pmt->pbFormat;
double fps = 1.0/pVih->AvgTimePerFrame*10000000.0;
if (!quiet)
fprintf(stdout, " Cap %2d: FORMAT_VideoInfo, %s, %d bits, %ldx%ld @ %d fps\n",
ii, fourcc2str(pVih->bmiHeader.biCompression),
pVih->bmiHeader.biBitCount,
pVih->bmiHeader.biWidth, pVih->bmiHeader.biHeight,
(int)fps);
} // if FORMAT_VideoInfo
else if (pmt->formattype == FORMAT_VideoInfo2) {
if (!quiet) fprintf(stdout, " Cap %2d: FORMAT_VideoInfo2\n", ii);
}
else {
wchar_t guid[256];
StringFromGUID2(pmt->formattype, (wchar_t *)&guid, 256);
if (!quiet) fwprintf(stdout, L" Cap %2d: FORMAT_%s\n", ii, guid);
}
_DeleteMediaType(pmt);
} // for
delete pSCC;
} // else got IAMStreamConfig
else {
if (!quiet) fprintf(stdout, "\n");
}
pPin->Release();
} // if pPin
} // while pEnumPins
} // if details
} // if pEnum
else {
// Finished listing device, so exit program
if (n == 0) exit_message("No devices found\n", 18);
else exit_message("", 0);
}
}
}
// Get moniker for specified video input device,
// or for the first device if no device number
// was specified.
VARIANT var;
n = 0;
while (1) {
// Access next device
hr = pEnum->Next(1, &pMoniker, NULL);
if (hr == S_OK)
n++; // increment device count
else {
if (device_number == 0)
fprintf(stderr, "Device \"%s\" not found\n", device_name);
else
fprintf(stderr, "Device number %d not found\n", device_number);
exit_message("", 19);
}
// If device was specified by name rather than number...
if (device_number == 0) {
// Get video input device name
hr = pMoniker->BindToStorage(0, 0, IID_PPV_ARGS(&pPropBag));
if (hr == S_OK) {
// Get current device name
VariantInit(&var);
hr = pPropBag->Read(L"FriendlyName", &var, 0);
// Convert to a normal C string, i.e. char*
sprintf(char_buffer, "%ls", var.bstrVal);
VariantClear(&var);
pPropBag->Release();
pPropBag = NULL;
// Exit loop if current device name matched devname
if (strcasecmp(device_name, char_buffer) == 0) break;
}
else
exit_message("Error getting device name\n", 20);
}
else if (n >= device_number) break;
}
// Get video input device name
hr = pMoniker->BindToStorage(0, 0, IID_PPV_ARGS(&pPropBag));
VariantInit(&var);
hr = pPropBag->Read(L"FriendlyName", &var, 0);
if (!quiet) fprintf(stdout, "Capture device: %ls\n", var.bstrVal);
VariantClear(&var);
// Create capture filter and add to graph
hr = pMoniker->BindToObject(0, 0,
IID_IBaseFilter, (void**)&pCap);
if (hr != S_OK)
exit_message("Could not create capture filter\n", 21);
// Add capture filter to graph
hr = pGraph->AddFilter(pCap, L"Capture Filter");
if (hr != S_OK)
exit_message("Could not add capture filter to graph\n", 22);
// Create sample grabber filter
hr = CoCreateInstance(CLSID_SampleGrabber, NULL,
CLSCTX_INPROC_SERVER, IID_IBaseFilter,
(void**)&pSampleGrabberFilter);
if (hr != S_OK)
exit_message("Could not create Sample Grabber filter\n", 23);
// Query the ISampleGrabber interface of the sample grabber filter
#ifdef __MINGW32__
hr = pSampleGrabberFilter->QueryInterface(IID_ISampleGrabber,
(void**)&pSampleGrabber);
#else
hr = pSampleGrabberFilter->QueryInterface(DexterLib::IID_ISampleGrabber,
(void**)&pSampleGrabber);
#endif
if (hr != S_OK)
exit_message("Could not get ISampleGrabber interface to sample grabber filter\n", 24);
// Enable sample buffering in the sample grabber filter
hr = pSampleGrabber->SetBufferSamples(true);
if (hr != S_OK)
exit_message("Could not enable sample buffering in the sample grabber\n", 25);
// Set media type in sample grabber filter
hr = pCap->EnumPins(&pEnumPins);
if (hr != S_OK)
exit_message("Could not enumerate pins in base filter\n", 26);
IPin *pPin = NULL;
bool formatSet = false;
while (pEnumPins->Next(1, &pPin, NULL) == S_OK && !formatSet) {
if (pPin) {
PIN_INFO PinInformation;
hr = pPin->QueryPinInfo(&PinInformation);
if (hr != S_OK)
exit_message("Could not get pin information\n", 27);
pConfig = NULL;
hr = pPin->QueryInterface(IID_IAMStreamConfig, (void**)&pConfig);
if (hr == S_OK) {
int count = 0; int size = 0;
hr = pConfig->GetNumberOfCapabilities(&count, &size);
if (hr != S_OK)
exit_message("Could not get number of capabilities\n", 28);
BYTE *pSCC = new BYTE[size];
for (int ii = 0; ii < count && !formatSet; ii++) {
AM_MEDIA_TYPE *pmt = NULL;
hr = pConfig->GetStreamCaps(ii, &pmt, pSCC);
if (hr != S_OK)
exit_message("Could not get stream capability\n", 29);
if (pmt->formattype == FORMAT_VideoInfo) {
VIDEOINFOHEADER *pVih = (VIDEOINFOHEADER *)pmt->pbFormat;
if (want_size) {
if (pVih->bmiHeader.biWidth == width &&
pVih->bmiHeader.biHeight == height) {
if (want_fourcc) {
if (pVih->bmiHeader.biCompression == fourcc) {
hr = pConfig->SetFormat(pmt);
if (hr != S_OK)
exit_message("Could not set media type in sample grabber\n", 30);
formatSet = true;
} // if fourcc
}
else { // any fourcc
hr = pConfig->SetFormat(pmt);
if (hr != S_OK)
exit_message("Could not set media type in sample grabber\n", 31);
formatSet = true;
}
} // if size
} // if want_size
else if (want_fourcc) {
if (pVih->bmiHeader.biCompression == fourcc) {
hr = pConfig->SetFormat(pmt);
if (hr != S_OK)
exit_message("Could not set media type in sample grabber\n", 32);
formatSet = true;
} // if fourcc
} // if want_fourcc
} // if FORMAT_VideoInfo
_DeleteMediaType(pmt);
} // for
delete pSCC;
} // else got IAMStreamConfig
pPin->Release();
} // if pPin
} // while pEnumPins
if ((want_size || want_fourcc) && !formatSet)
fprintf(stderr, "Could not set desired format\n");
// Add sample grabber filter to filter graph
hr = pGraph->AddFilter(pSampleGrabberFilter, L"SampleGrab");
if (hr != S_OK)
exit_message("Could not add Sample Grabber to filter graph\n", 33);
// Create Null Renderer filter
hr = CoCreateInstance(CLSID_NullRenderer, NULL,
CLSCTX_INPROC_SERVER, IID_IBaseFilter,
(void**)&pNullRenderer);
if (hr != S_OK)
exit_message("Could not create Null Renderer filter\n", 34);
// Add Null Renderer filter to filter graph
hr = pGraph->AddFilter(pNullRenderer, L"NullRender");
if (hr != S_OK)
exit_message("Could not add Null Renderer to filter graph\n", 35);
// Connect up the filter graph's capture stream
hr = pBuilder->RenderStream(&PIN_CATEGORY_CAPTURE, &MEDIATYPE_Video,
pCap, pSampleGrabberFilter, pNullRenderer);