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Frame.cpp@1:5d20e168f467, 2009-12-14 (annotated)

Committer:: voidnoise
Date:: Mon Dec 14 08:25:07 2009 +0000
Revision:: 1:5d20e168f467
Parent:: 0:da6a22da11a2

Who changed what in which revision?

User	Revision	Line number	New contents of line
voidnoise	0:da6a22da11a2	1	#include "stdafx.h"
voidnoise	0:da6a22da11a2	2
voidnoise	0:da6a22da11a2	3	#include "mbed.h"
voidnoise	0:da6a22da11a2	4	#include "ucam.h"
voidnoise	0:da6a22da11a2	5	#include "Frame.h"
voidnoise	0:da6a22da11a2	6
voidnoise	0:da6a22da11a2	7	extern Logger pcSerial;
voidnoise	0:da6a22da11a2	8
voidnoise	0:da6a22da11a2	9	Frame* Frame::m_frames[MAX_FRAMES]; // array of reusable frames
voidnoise	0:da6a22da11a2	10
voidnoise	0:da6a22da11a2	11	Frame::Frame() // don't construct Frame yourself - call allocFrame instead
voidnoise	0:da6a22da11a2	12	{
voidnoise	0:da6a22da11a2	13	m_pixels = NULL;
voidnoise	0:da6a22da11a2	14	m_width = 0;
voidnoise	0:da6a22da11a2	15	m_height = 0;
voidnoise	0:da6a22da11a2	16	m_pixelFormat = 0;
voidnoise	0:da6a22da11a2	17	m_deleted = true;
voidnoise	0:da6a22da11a2	18	m_numPixels = 0;
voidnoise	0:da6a22da11a2	19	m_bad = false;
voidnoise	0:da6a22da11a2	20	}
voidnoise	0:da6a22da11a2	21
voidnoise	0:da6a22da11a2	22
voidnoise	0:da6a22da11a2	23	Frame::~Frame()
voidnoise	0:da6a22da11a2	24	{
voidnoise	0:da6a22da11a2	25	if( m_pixels != NULL )
voidnoise	0:da6a22da11a2	26	free( m_pixels );
voidnoise	0:da6a22da11a2	27
voidnoise	0:da6a22da11a2	28	}
voidnoise	0:da6a22da11a2	29
voidnoise	0:da6a22da11a2	30	// static - initialise the array of frames - call once at app start time
voidnoise	0:da6a22da11a2	31	void Frame::initFrames()
voidnoise	0:da6a22da11a2	32	{
voidnoise	0:da6a22da11a2	33	for( int f = 0; f < MAX_FRAMES; f ++ )
voidnoise	0:da6a22da11a2	34	m_frames[f] = NULL;
voidnoise	0:da6a22da11a2	35	}
voidnoise	0:da6a22da11a2	36
voidnoise	0:da6a22da11a2	37	//static - reuse an existing frame, or make a new one
voidnoise	0:da6a22da11a2	38	void Frame::allocFrame( Frame **frame, uint8_t pixelFormat, uint16_t width, uint16_t height, uint16_t frameSize )
voidnoise	0:da6a22da11a2	39	{
voidnoise	0:da6a22da11a2	40	for( int f = 0; f < MAX_FRAMES; f ++ )
voidnoise	0:da6a22da11a2	41	if( m_frames[f] == NULL )
voidnoise	0:da6a22da11a2	42	{
voidnoise	0:da6a22da11a2	43	m_frames[f] = new Frame();
voidnoise	0:da6a22da11a2	44	m_frames[f]->init( pixelFormat, width, height, frameSize );
voidnoise	0:da6a22da11a2	45	*frame = m_frames[f];
voidnoise	0:da6a22da11a2	46
voidnoise	0:da6a22da11a2	47	return;
voidnoise	0:da6a22da11a2	48	}
voidnoise	0:da6a22da11a2	49	else
voidnoise	0:da6a22da11a2	50	{
voidnoise	0:da6a22da11a2	51	if( m_frames[f]->m_deleted )
voidnoise	0:da6a22da11a2	52	{
voidnoise	0:da6a22da11a2	53	m_frames[f]->init( pixelFormat, width, height, frameSize );
voidnoise	0:da6a22da11a2	54	*frame = m_frames[f];
voidnoise	0:da6a22da11a2	55	return;
voidnoise	0:da6a22da11a2	56	}
voidnoise	0:da6a22da11a2	57
voidnoise	0:da6a22da11a2	58	}
voidnoise	0:da6a22da11a2	59
voidnoise	0:da6a22da11a2	60	pcSerial.printf("No free frames!\r\n");
voidnoise	0:da6a22da11a2	61	*frame = NULL;
voidnoise	0:da6a22da11a2	62
voidnoise	0:da6a22da11a2	63	}
voidnoise	0:da6a22da11a2	64
voidnoise	0:da6a22da11a2	65	//static - make an existing frame available for reuse
voidnoise	0:da6a22da11a2	66	void Frame::releaseFrame( Frame **frame )
voidnoise	0:da6a22da11a2	67	{
voidnoise	0:da6a22da11a2	68	for( int f = 0; f < MAX_FRAMES; f ++ )
voidnoise	0:da6a22da11a2	69	if( m_frames[f] == *frame )
voidnoise	0:da6a22da11a2	70	{
voidnoise	0:da6a22da11a2	71	m_frames[f]->m_deleted = true;
voidnoise	0:da6a22da11a2	72	*frame = NULL;
voidnoise	0:da6a22da11a2	73	return;
voidnoise	0:da6a22da11a2	74	}
voidnoise	0:da6a22da11a2	75	}
voidnoise	0:da6a22da11a2	76
voidnoise	0:da6a22da11a2	77	//static - make a new frame with the same parameters as an existing one, alloc a pixel buffer, but do not initialise the pixels
voidnoise	0:da6a22da11a2	78	void Frame::cloneFrame( Frame *clone, Frame original )
voidnoise	0:da6a22da11a2	79	{
voidnoise	0:da6a22da11a2	80	allocFrame( clone, original->m_pixelFormat, original->m_width, original->m_height, original->m_frameSize );
voidnoise	0:da6a22da11a2	81
voidnoise	0:da6a22da11a2	82	}
voidnoise	0:da6a22da11a2	83
voidnoise	0:da6a22da11a2	84
voidnoise	0:da6a22da11a2	85	void Frame::init( uint8_t pixelFormat, uint16_t width, uint16_t height, uint32_t frameSize )
voidnoise	0:da6a22da11a2	86	{
voidnoise	0:da6a22da11a2	87
voidnoise	0:da6a22da11a2	88	if( m_frameSize != frameSize ) // keep the same pixel buffer if we can, to avoid fragmentation
voidnoise	0:da6a22da11a2	89	{
voidnoise	0:da6a22da11a2	90	free( m_pixels );
voidnoise	0:da6a22da11a2	91	m_pixels = (uint8_t *) malloc( frameSize );
voidnoise	0:da6a22da11a2	92	}
voidnoise	0:da6a22da11a2	93
voidnoise	0:da6a22da11a2	94	m_pixelFormat = pixelFormat;
voidnoise	0:da6a22da11a2	95	m_width = width;
voidnoise	0:da6a22da11a2	96	m_height = height;
voidnoise	0:da6a22da11a2	97	m_frameSize = frameSize;
voidnoise	0:da6a22da11a2	98	m_deleted = false;
voidnoise	0:da6a22da11a2	99	m_bad = false;
voidnoise	0:da6a22da11a2	100
voidnoise	0:da6a22da11a2	101	switch( m_pixelFormat )
voidnoise	0:da6a22da11a2	102	{
voidnoise	0:da6a22da11a2	103	case UCAM_COLOUR_2_BIT_GREY:
voidnoise	0:da6a22da11a2	104	m_bitsPerPixel = 2;
voidnoise	0:da6a22da11a2	105	break;
voidnoise	0:da6a22da11a2	106	case UCAM_COLOUR_4_BIT_GREY:
voidnoise	0:da6a22da11a2	107	m_bitsPerPixel = 4;
voidnoise	0:da6a22da11a2	108	break;
voidnoise	0:da6a22da11a2	109	case UCAM_COLOUR_8_BIT_GREY:
voidnoise	0:da6a22da11a2	110	m_bitsPerPixel = 8;
voidnoise	0:da6a22da11a2	111	break;
voidnoise	0:da6a22da11a2	112	case UCAM_COLOUR_8_BIT_COLOUR:
voidnoise	0:da6a22da11a2	113	m_bitsPerPixel = 8;
voidnoise	0:da6a22da11a2	114	break;
voidnoise	0:da6a22da11a2	115	case UCAM_COLOUR_12_BIT_COLOR:
voidnoise	0:da6a22da11a2	116	m_bitsPerPixel = 16;
voidnoise	0:da6a22da11a2	117	break;
voidnoise	0:da6a22da11a2	118	case UCAM_COLOUR_16_BIT_COLOR:
voidnoise	0:da6a22da11a2	119	m_bitsPerPixel = 16;
voidnoise	0:da6a22da11a2	120	break;
voidnoise	0:da6a22da11a2	121	case UCAM_COLOUR_JPEG:
voidnoise	0:da6a22da11a2	122	default:
voidnoise	0:da6a22da11a2	123	m_bitsPerPixel = 16; // ?? not at all sure, but we are not using frames to handle jpegs right now
voidnoise	0:da6a22da11a2	124	break;
voidnoise	0:da6a22da11a2	125	}
voidnoise	0:da6a22da11a2	126
voidnoise	0:da6a22da11a2	127	m_numPixels = (8 * m_frameSize) / m_bitsPerPixel;
voidnoise	0:da6a22da11a2	128	}
voidnoise	0:da6a22da11a2	129
voidnoise	0:da6a22da11a2	130	uint16_t Frame::getPixel( uint32_t p )
voidnoise	0:da6a22da11a2	131	{
voidnoise	0:da6a22da11a2	132	switch( m_bitsPerPixel )
voidnoise	0:da6a22da11a2	133	{
voidnoise	0:da6a22da11a2	134	case 4:
voidnoise	0:da6a22da11a2	135	if( p & 1 )
voidnoise	0:da6a22da11a2	136	return m_pixels[ p >> 1 ] & 0x0f;
voidnoise	0:da6a22da11a2	137	else
voidnoise	0:da6a22da11a2	138	return m_pixels[ p >> 1 ] >> 4;
voidnoise	0:da6a22da11a2	139
voidnoise	0:da6a22da11a2	140
voidnoise	0:da6a22da11a2	141	case 8:
voidnoise	0:da6a22da11a2	142	return m_pixels[ p ];
voidnoise	0:da6a22da11a2	143
voidnoise	0:da6a22da11a2	144	case 16:
voidnoise	0:da6a22da11a2	145	default:
voidnoise	0:da6a22da11a2	146	return ((m_pixels[p<<1]) << 8) + m_pixels[1 + (p<<1) ]; // todo - check bytes order
voidnoise	0:da6a22da11a2	147	}
voidnoise	0:da6a22da11a2	148	}
voidnoise	0:da6a22da11a2	149
voidnoise	0:da6a22da11a2	150	void Frame::setPixel( uint32_t p, uint16_t val )
voidnoise	0:da6a22da11a2	151	{
voidnoise	0:da6a22da11a2	152	switch( m_bitsPerPixel )
voidnoise	0:da6a22da11a2	153	{
voidnoise	0:da6a22da11a2	154	case 4:
voidnoise	0:da6a22da11a2	155	if( p & 1 )
voidnoise	0:da6a22da11a2	156	m_pixels[ p >> 1 ] = ( m_pixels[ p >> 1 ] & 0xf0) \| (val & 0x0f);
voidnoise	0:da6a22da11a2	157	else
voidnoise	0:da6a22da11a2	158	m_pixels[ p >> 1 ] = ( m_pixels[ p >> 1 ] & 0x0f) \| ((val & 0x0f) << 4 );
voidnoise	0:da6a22da11a2	159	break;
voidnoise	0:da6a22da11a2	160
voidnoise	0:da6a22da11a2	161	case 8:
voidnoise	0:da6a22da11a2	162	m_pixels[ p ] = (uint8_t) val;
voidnoise	0:da6a22da11a2	163	break;
voidnoise	0:da6a22da11a2	164	case 16:
voidnoise	0:da6a22da11a2	165	default:
voidnoise	0:da6a22da11a2	166	m_pixels[p<<1] = val>>8;
voidnoise	0:da6a22da11a2	167	m_pixels[1 + (p<<1) ] = val & 0xff;
voidnoise	0:da6a22da11a2	168	break;
voidnoise	0:da6a22da11a2	169	}
voidnoise	0:da6a22da11a2	170
voidnoise	0:da6a22da11a2	171
voidnoise	0:da6a22da11a2	172	}
voidnoise	0:da6a22da11a2	173
voidnoise	0:da6a22da11a2	174	void Frame::writeToFile( char *filename )
voidnoise	0:da6a22da11a2	175	{
voidnoise	0:da6a22da11a2	176	pcSerial.printf("writeToFile - %s\r\n", filename);
voidnoise	0:da6a22da11a2	177
voidnoise	0:da6a22da11a2	178	FILE *rawFile = fopen(filename, FILE_WRITE_STRING); // "w" or "wb" for Windows
voidnoise	0:da6a22da11a2	179
voidnoise	0:da6a22da11a2	180	fwrite( &m_pixelFormat, 1, 1, rawFile );
voidnoise	0:da6a22da11a2	181	fwrite( &m_width, 1, 2, rawFile );
voidnoise	0:da6a22da11a2	182	fwrite( &m_height, 1, 2, rawFile );
voidnoise	0:da6a22da11a2	183	fwrite( &m_frameSize, 1, 4, rawFile );
voidnoise	0:da6a22da11a2	184
voidnoise	0:da6a22da11a2	185	fwrite( m_pixels, 1, m_frameSize, rawFile );
voidnoise	0:da6a22da11a2	186
voidnoise	0:da6a22da11a2	187	fclose( rawFile );
voidnoise	0:da6a22da11a2	188
voidnoise	0:da6a22da11a2	189	}
voidnoise	0:da6a22da11a2	190
voidnoise	0:da6a22da11a2	191	// static
voidnoise	0:da6a22da11a2	192	void Frame::readFromFile( char filename, Frame *frame )
voidnoise	0:da6a22da11a2	193	{
voidnoise	0:da6a22da11a2	194	*frame = NULL;
voidnoise	0:da6a22da11a2	195
voidnoise	0:da6a22da11a2	196	pcSerial.printf("readFromFile - %s\r\n", filename);
voidnoise	0:da6a22da11a2	197
voidnoise	0:da6a22da11a2	198	FILE *rawFile = fopen(filename, FILE_READ_STRING);
voidnoise	0:da6a22da11a2	199	if( rawFile == NULL )
voidnoise	0:da6a22da11a2	200	{
voidnoise	0:da6a22da11a2	201	pcSerial.printf("readFromFile - failed to open %s\r\n", filename);
voidnoise	0:da6a22da11a2	202	return;
voidnoise	0:da6a22da11a2	203	}
voidnoise	0:da6a22da11a2	204
voidnoise	0:da6a22da11a2	205	uint8_t pixelFormat;
voidnoise	0:da6a22da11a2	206	uint16_t width;
voidnoise	0:da6a22da11a2	207	uint16_t height;
voidnoise	0:da6a22da11a2	208	uint32_t frameSize;
voidnoise	0:da6a22da11a2	209
voidnoise	0:da6a22da11a2	210	if( 1 == fread( &pixelFormat, 1, 1, rawFile ))
voidnoise	0:da6a22da11a2	211	if( 2 == fread( &width, 1, 2, rawFile ))
voidnoise	0:da6a22da11a2	212	if( 2 == fread( &height, 1, 2, rawFile ))
voidnoise	0:da6a22da11a2	213	if( 4 == fread( &frameSize, 1, 4, rawFile ))
voidnoise	0:da6a22da11a2	214	{
voidnoise	0:da6a22da11a2	215
voidnoise	0:da6a22da11a2	216	allocFrame( frame, pixelFormat, width, height, frameSize );
voidnoise	0:da6a22da11a2	217
voidnoise	0:da6a22da11a2	218	if( frameSize != fread( (*frame)->m_pixels, 1, frameSize, rawFile ))
voidnoise	0:da6a22da11a2	219	{
voidnoise	0:da6a22da11a2	220	releaseFrame( frame );
voidnoise	0:da6a22da11a2	221	pcSerial.printf("readFromFile - bad size");
voidnoise	0:da6a22da11a2	222	}
voidnoise	0:da6a22da11a2	223	}
voidnoise	0:da6a22da11a2	224
voidnoise	0:da6a22da11a2	225	fclose( rawFile );
voidnoise	0:da6a22da11a2	226
voidnoise	0:da6a22da11a2	227	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	11 Dec 2009
Imports:	12
Forks:	0
Commits:	2
Dependents:	0
Dependencies:	1
Followers:	1

Frame.cpp@1:5d20e168f467, 2009-12-14 (annotated)

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