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Frame.cpp@2:01115080f6da, 2009-12-14 (annotated)

Committer:: jarkman
Date:: Mon Dec 14 08:28:21 2009 +0000
Revision:: 2:01115080f6da
Parent:: 0:57f4fdadc97f

Who changed what in which revision?

User	Revision	Line number	New contents of line
jarkman	0:57f4fdadc97f	1	#include "stdafx.h"
jarkman	0:57f4fdadc97f	2
jarkman	0:57f4fdadc97f	3	#include "mbed.h"
jarkman	0:57f4fdadc97f	4	#include "ucam.h"
jarkman	0:57f4fdadc97f	5	#include "Frame.h"
jarkman	0:57f4fdadc97f	6
jarkman	0:57f4fdadc97f	7	extern Logger pcSerial;
jarkman	0:57f4fdadc97f	8
jarkman	0:57f4fdadc97f	9	Frame* Frame::m_frames[MAX_FRAMES]; // array of reusable frames
jarkman	0:57f4fdadc97f	10
jarkman	0:57f4fdadc97f	11	Frame::Frame() // don't construct Frame yourself - call allocFrame instead
jarkman	0:57f4fdadc97f	12	{
jarkman	0:57f4fdadc97f	13	m_pixels = NULL;
jarkman	0:57f4fdadc97f	14	m_width = 0;
jarkman	0:57f4fdadc97f	15	m_height = 0;
jarkman	0:57f4fdadc97f	16	m_pixelFormat = 0;
jarkman	0:57f4fdadc97f	17	m_deleted = true;
jarkman	0:57f4fdadc97f	18	m_numPixels = 0;
jarkman	0:57f4fdadc97f	19	m_bad = false;
jarkman	0:57f4fdadc97f	20	}
jarkman	0:57f4fdadc97f	21
jarkman	0:57f4fdadc97f	22
jarkman	0:57f4fdadc97f	23	Frame::~Frame()
jarkman	0:57f4fdadc97f	24	{
jarkman	0:57f4fdadc97f	25	if( m_pixels != NULL )
jarkman	0:57f4fdadc97f	26	free( m_pixels );
jarkman	0:57f4fdadc97f	27
jarkman	0:57f4fdadc97f	28	}
jarkman	0:57f4fdadc97f	29
jarkman	0:57f4fdadc97f	30	// static - initialise the array of frames - call once at app start time
jarkman	0:57f4fdadc97f	31	void Frame::initFrames()
jarkman	0:57f4fdadc97f	32	{
jarkman	0:57f4fdadc97f	33	for( int f = 0; f < MAX_FRAMES; f ++ )
jarkman	0:57f4fdadc97f	34	m_frames[f] = NULL;
jarkman	0:57f4fdadc97f	35	}
jarkman	0:57f4fdadc97f	36
jarkman	0:57f4fdadc97f	37	//static - reuse an existing frame, or make a new one
jarkman	0:57f4fdadc97f	38	void Frame::allocFrame( Frame **frame, uint8_t pixelFormat, uint16_t width, uint16_t height, uint16_t frameSize )
jarkman	0:57f4fdadc97f	39	{
jarkman	0:57f4fdadc97f	40	for( int f = 0; f < MAX_FRAMES; f ++ )
jarkman	0:57f4fdadc97f	41	if( m_frames[f] == NULL )
jarkman	0:57f4fdadc97f	42	{
jarkman	0:57f4fdadc97f	43	m_frames[f] = new Frame();
jarkman	0:57f4fdadc97f	44	m_frames[f]->init( pixelFormat, width, height, frameSize );
jarkman	0:57f4fdadc97f	45	*frame = m_frames[f];
jarkman	0:57f4fdadc97f	46
jarkman	0:57f4fdadc97f	47	return;
jarkman	0:57f4fdadc97f	48	}
jarkman	0:57f4fdadc97f	49	else
jarkman	0:57f4fdadc97f	50	{
jarkman	0:57f4fdadc97f	51	if( m_frames[f]->m_deleted )
jarkman	0:57f4fdadc97f	52	{
jarkman	0:57f4fdadc97f	53	m_frames[f]->init( pixelFormat, width, height, frameSize );
jarkman	0:57f4fdadc97f	54	*frame = m_frames[f];
jarkman	0:57f4fdadc97f	55	return;
jarkman	0:57f4fdadc97f	56	}
jarkman	0:57f4fdadc97f	57
jarkman	0:57f4fdadc97f	58	}
jarkman	0:57f4fdadc97f	59
jarkman	0:57f4fdadc97f	60	pcSerial.printf("No free frames!\r\n");
jarkman	0:57f4fdadc97f	61	*frame = NULL;
jarkman	0:57f4fdadc97f	62
jarkman	0:57f4fdadc97f	63	}
jarkman	0:57f4fdadc97f	64
jarkman	0:57f4fdadc97f	65	//static - make an existing frame available for reuse
jarkman	0:57f4fdadc97f	66	void Frame::releaseFrame( Frame **frame )
jarkman	0:57f4fdadc97f	67	{
jarkman	0:57f4fdadc97f	68	for( int f = 0; f < MAX_FRAMES; f ++ )
jarkman	0:57f4fdadc97f	69	if( m_frames[f] == *frame )
jarkman	0:57f4fdadc97f	70	{
jarkman	0:57f4fdadc97f	71	m_frames[f]->m_deleted = true;
jarkman	0:57f4fdadc97f	72	*frame = NULL;
jarkman	0:57f4fdadc97f	73	return;
jarkman	0:57f4fdadc97f	74	}
jarkman	0:57f4fdadc97f	75	}
jarkman	0:57f4fdadc97f	76
jarkman	0:57f4fdadc97f	77	//static - make a new frame with the same parameters as an existing one, alloc a pixel buffer, but do not initialise the pixels
jarkman	0:57f4fdadc97f	78	void Frame::cloneFrame( Frame *clone, Frame original )
jarkman	0:57f4fdadc97f	79	{
jarkman	0:57f4fdadc97f	80	allocFrame( clone, original->m_pixelFormat, original->m_width, original->m_height, original->m_frameSize );
jarkman	0:57f4fdadc97f	81
jarkman	0:57f4fdadc97f	82	}
jarkman	0:57f4fdadc97f	83
jarkman	0:57f4fdadc97f	84
jarkman	0:57f4fdadc97f	85	void Frame::init( uint8_t pixelFormat, uint16_t width, uint16_t height, uint32_t frameSize )
jarkman	0:57f4fdadc97f	86	{
jarkman	0:57f4fdadc97f	87
jarkman	0:57f4fdadc97f	88	if( m_frameSize != frameSize ) // keep the same pixel buffer if we can, to avoid fragmentation
jarkman	0:57f4fdadc97f	89	{
jarkman	0:57f4fdadc97f	90	free( m_pixels );
jarkman	0:57f4fdadc97f	91	m_pixels = (uint8_t *) malloc( frameSize );
jarkman	0:57f4fdadc97f	92	}
jarkman	0:57f4fdadc97f	93
jarkman	0:57f4fdadc97f	94	m_pixelFormat = pixelFormat;
jarkman	0:57f4fdadc97f	95	m_width = width;
jarkman	0:57f4fdadc97f	96	m_height = height;
jarkman	0:57f4fdadc97f	97	m_frameSize = frameSize;
jarkman	0:57f4fdadc97f	98	m_deleted = false;
jarkman	0:57f4fdadc97f	99	m_bad = false;
jarkman	0:57f4fdadc97f	100
jarkman	0:57f4fdadc97f	101	switch( m_pixelFormat )
jarkman	0:57f4fdadc97f	102	{
jarkman	0:57f4fdadc97f	103	case UCAM_COLOUR_2_BIT_GREY:
jarkman	0:57f4fdadc97f	104	m_bitsPerPixel = 2;
jarkman	0:57f4fdadc97f	105	break;
jarkman	0:57f4fdadc97f	106	case UCAM_COLOUR_4_BIT_GREY:
jarkman	0:57f4fdadc97f	107	m_bitsPerPixel = 4;
jarkman	0:57f4fdadc97f	108	break;
jarkman	0:57f4fdadc97f	109	case UCAM_COLOUR_8_BIT_GREY:
jarkman	0:57f4fdadc97f	110	m_bitsPerPixel = 8;
jarkman	0:57f4fdadc97f	111	break;
jarkman	0:57f4fdadc97f	112	case UCAM_COLOUR_8_BIT_COLOUR:
jarkman	0:57f4fdadc97f	113	m_bitsPerPixel = 8;
jarkman	0:57f4fdadc97f	114	break;
jarkman	0:57f4fdadc97f	115	case UCAM_COLOUR_12_BIT_COLOR:
jarkman	0:57f4fdadc97f	116	m_bitsPerPixel = 16;
jarkman	0:57f4fdadc97f	117	break;
jarkman	0:57f4fdadc97f	118	case UCAM_COLOUR_16_BIT_COLOR:
jarkman	0:57f4fdadc97f	119	m_bitsPerPixel = 16;
jarkman	0:57f4fdadc97f	120	break;
jarkman	0:57f4fdadc97f	121	case UCAM_COLOUR_JPEG:
jarkman	0:57f4fdadc97f	122	default:
jarkman	0:57f4fdadc97f	123	m_bitsPerPixel = 16; // ?? not at all sure, but we are not using frames to handle jpegs right now
jarkman	0:57f4fdadc97f	124	break;
jarkman	0:57f4fdadc97f	125	}
jarkman	0:57f4fdadc97f	126
jarkman	0:57f4fdadc97f	127	m_numPixels = (8 * m_frameSize) / m_bitsPerPixel;
jarkman	0:57f4fdadc97f	128	}
jarkman	0:57f4fdadc97f	129
jarkman	0:57f4fdadc97f	130	uint16_t Frame::getPixel( uint32_t p )
jarkman	0:57f4fdadc97f	131	{
jarkman	0:57f4fdadc97f	132	switch( m_bitsPerPixel )
jarkman	0:57f4fdadc97f	133	{
jarkman	0:57f4fdadc97f	134	case 4:
jarkman	0:57f4fdadc97f	135	if( p & 1 )
jarkman	0:57f4fdadc97f	136	return m_pixels[ p >> 1 ] & 0x0f;
jarkman	0:57f4fdadc97f	137	else
jarkman	0:57f4fdadc97f	138	return m_pixels[ p >> 1 ] >> 4;
jarkman	0:57f4fdadc97f	139
jarkman	0:57f4fdadc97f	140
jarkman	0:57f4fdadc97f	141	case 8:
jarkman	0:57f4fdadc97f	142	return m_pixels[ p ];
jarkman	0:57f4fdadc97f	143
jarkman	0:57f4fdadc97f	144	case 16:
jarkman	0:57f4fdadc97f	145	default:
jarkman	0:57f4fdadc97f	146	return ((m_pixels[p<<1]) << 8) + m_pixels[1 + (p<<1) ]; // todo - check bytes order
jarkman	0:57f4fdadc97f	147	}
jarkman	0:57f4fdadc97f	148	}
jarkman	0:57f4fdadc97f	149
jarkman	0:57f4fdadc97f	150	void Frame::setPixel( uint32_t p, uint16_t val )
jarkman	0:57f4fdadc97f	151	{
jarkman	0:57f4fdadc97f	152	switch( m_bitsPerPixel )
jarkman	0:57f4fdadc97f	153	{
jarkman	0:57f4fdadc97f	154	case 4:
jarkman	0:57f4fdadc97f	155	if( p & 1 )
jarkman	0:57f4fdadc97f	156	m_pixels[ p >> 1 ] = ( m_pixels[ p >> 1 ] & 0xf0) \| (val & 0x0f);
jarkman	0:57f4fdadc97f	157	else
jarkman	0:57f4fdadc97f	158	m_pixels[ p >> 1 ] = ( m_pixels[ p >> 1 ] & 0x0f) \| ((val & 0x0f) << 4 );
jarkman	0:57f4fdadc97f	159	break;
jarkman	0:57f4fdadc97f	160
jarkman	0:57f4fdadc97f	161	case 8:
jarkman	0:57f4fdadc97f	162	m_pixels[ p ] = (uint8_t) val;
jarkman	0:57f4fdadc97f	163	break;
jarkman	0:57f4fdadc97f	164	case 16:
jarkman	0:57f4fdadc97f	165	default:
jarkman	0:57f4fdadc97f	166	m_pixels[p<<1] = val>>8;
jarkman	0:57f4fdadc97f	167	m_pixels[1 + (p<<1) ] = val & 0xff;
jarkman	0:57f4fdadc97f	168	break;
jarkman	0:57f4fdadc97f	169	}
jarkman	0:57f4fdadc97f	170
jarkman	0:57f4fdadc97f	171
jarkman	0:57f4fdadc97f	172	}
jarkman	0:57f4fdadc97f	173
jarkman	0:57f4fdadc97f	174	void Frame::writeToFile( char *filename )
jarkman	0:57f4fdadc97f	175	{
jarkman	0:57f4fdadc97f	176	pcSerial.printf("writeToFile - %s\r\n", filename);
jarkman	0:57f4fdadc97f	177
jarkman	0:57f4fdadc97f	178	FILE *rawFile = fopen(filename, FILE_WRITE_STRING); // "w" or "wb" for Windows
jarkman	0:57f4fdadc97f	179
jarkman	0:57f4fdadc97f	180	fwrite( &m_pixelFormat, 1, 1, rawFile );
jarkman	0:57f4fdadc97f	181	fwrite( &m_width, 1, 2, rawFile );
jarkman	0:57f4fdadc97f	182	fwrite( &m_height, 1, 2, rawFile );
jarkman	0:57f4fdadc97f	183	fwrite( &m_frameSize, 1, 4, rawFile );
jarkman	0:57f4fdadc97f	184
jarkman	0:57f4fdadc97f	185	fwrite( m_pixels, 1, m_frameSize, rawFile );
jarkman	0:57f4fdadc97f	186
jarkman	0:57f4fdadc97f	187	fclose( rawFile );
jarkman	0:57f4fdadc97f	188
jarkman	0:57f4fdadc97f	189	}
jarkman	0:57f4fdadc97f	190
jarkman	0:57f4fdadc97f	191	// static
jarkman	0:57f4fdadc97f	192	void Frame::readFromFile( char filename, Frame *frame )
jarkman	0:57f4fdadc97f	193	{
jarkman	0:57f4fdadc97f	194	*frame = NULL;
jarkman	0:57f4fdadc97f	195
jarkman	0:57f4fdadc97f	196	pcSerial.printf("readFromFile - %s\r\n", filename);
jarkman	0:57f4fdadc97f	197
jarkman	0:57f4fdadc97f	198	FILE *rawFile = fopen(filename, FILE_READ_STRING);
jarkman	0:57f4fdadc97f	199	if( rawFile == NULL )
jarkman	0:57f4fdadc97f	200	{
jarkman	0:57f4fdadc97f	201	pcSerial.printf("readFromFile - failed to open %s\r\n", filename);
jarkman	0:57f4fdadc97f	202	return;
jarkman	0:57f4fdadc97f	203	}
jarkman	0:57f4fdadc97f	204
jarkman	0:57f4fdadc97f	205	uint8_t pixelFormat;
jarkman	0:57f4fdadc97f	206	uint16_t width;
jarkman	0:57f4fdadc97f	207	uint16_t height;
jarkman	0:57f4fdadc97f	208	uint32_t frameSize;
jarkman	0:57f4fdadc97f	209
jarkman	0:57f4fdadc97f	210	if( 1 == fread( &pixelFormat, 1, 1, rawFile ))
jarkman	0:57f4fdadc97f	211	if( 2 == fread( &width, 1, 2, rawFile ))
jarkman	0:57f4fdadc97f	212	if( 2 == fread( &height, 1, 2, rawFile ))
jarkman	0:57f4fdadc97f	213	if( 4 == fread( &frameSize, 1, 4, rawFile ))
jarkman	0:57f4fdadc97f	214	{
jarkman	0:57f4fdadc97f	215
jarkman	0:57f4fdadc97f	216	allocFrame( frame, pixelFormat, width, height, frameSize );
jarkman	0:57f4fdadc97f	217
jarkman	0:57f4fdadc97f	218	if( frameSize != fread( (*frame)->m_pixels, 1, frameSize, rawFile ))
jarkman	0:57f4fdadc97f	219	{
jarkman	0:57f4fdadc97f	220	releaseFrame( frame );
jarkman	0:57f4fdadc97f	221	pcSerial.printf("readFromFile - bad size");
jarkman	0:57f4fdadc97f	222	}
jarkman	0:57f4fdadc97f	223	}
jarkman	0:57f4fdadc97f	224
jarkman	0:57f4fdadc97f	225	fclose( rawFile );
jarkman	0:57f4fdadc97f	226
jarkman	0:57f4fdadc97f	227	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	20 Nov 2009
Imports:	79
Forks:	0
Commits:	3
Dependents:	0
Dependencies:	1
Followers:	3

Frame.cpp@2:01115080f6da, 2009-12-14 (annotated)

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