CM-MBED_RS_EDP_SDCARD_WAV_Header_Reader - This software will read a .wav file from an SD ca…

Users » DavidGilesHitex » Code » CM-MBED_RS_EDP_SDCARD_WAV_Header_Reader

David Giles / Mbed 2 deprecated CM-MBED_RS_EDP_SDCARD_WAV_Header_Reader

This software will read a .wav file from an SD card and display the header information contained within it. It is designed to work with the SD card on the mbed carrier which is part of the RS-EDP system.

Dependencies: mbed SDFileSystem

SourceFiles/Wav_Support_File.cpp@0:35c1800c59e6, 2010-11-19 (annotated)

Committer:: DavidGilesHitex
Date:: Fri Nov 19 09:54:23 2010 +0000
Revision:: 0:35c1800c59e6

Who changed what in which revision?

User	Revision	Line number	New contents of line
DavidGilesHitex	0:35c1800c59e6	1	/* Wav File Support */
DavidGilesHitex	0:35c1800c59e6	2	/* **************** */
DavidGilesHitex	0:35c1800c59e6	3
DavidGilesHitex	0:35c1800c59e6	4	#include "mbed.h"
DavidGilesHitex	0:35c1800c59e6	5	#include "defines.h"
DavidGilesHitex	0:35c1800c59e6	6	#include "misra_types.h"
DavidGilesHitex	0:35c1800c59e6	7	#include "mbed_Port_Structure.h"
DavidGilesHitex	0:35c1800c59e6	8
DavidGilesHitex	0:35c1800c59e6	9
DavidGilesHitex	0:35c1800c59e6	10
DavidGilesHitex	0:35c1800c59e6	11	/* Function Prototypes */
DavidGilesHitex	0:35c1800c59e6	12	uint8_t wave_file_check(uint8_t wave_array, FILE open_file);
DavidGilesHitex	0:35c1800c59e6	13
DavidGilesHitex	0:35c1800c59e6	14
DavidGilesHitex	0:35c1800c59e6	15	/* Global Variables */
DavidGilesHitex	0:35c1800c59e6	16	struct wave_header_construction
DavidGilesHitex	0:35c1800c59e6	17	{ sint8_t identification_block[5];
DavidGilesHitex	0:35c1800c59e6	18	uint32_t length_of_file;
DavidGilesHitex	0:35c1800c59e6	19	sint8_t identifier1[5];
DavidGilesHitex	0:35c1800c59e6	20	sint8_t identifier2[5];
DavidGilesHitex	0:35c1800c59e6	21	uint32_t position_of_data;
DavidGilesHitex	0:35c1800c59e6	22	uint16_t format_tag;
DavidGilesHitex	0:35c1800c59e6	23	uint16_t number_of_channels;
DavidGilesHitex	0:35c1800c59e6	24	uint32_t samples_per_second;
DavidGilesHitex	0:35c1800c59e6	25	uint32_t bytes_per_second;
DavidGilesHitex	0:35c1800c59e6	26	uint16_t bytes_per_sample;
DavidGilesHitex	0:35c1800c59e6	27	uint16_t bits_per_sample;
DavidGilesHitex	0:35c1800c59e6	28	sint8_t marker[5];
DavidGilesHitex	0:35c1800c59e6	29	uint32_t number_of_bits_in_sample;
DavidGilesHitex	0:35c1800c59e6	30	} wave_file_info;
DavidGilesHitex	0:35c1800c59e6	31
DavidGilesHitex	0:35c1800c59e6	32
DavidGilesHitex	0:35c1800c59e6	33
DavidGilesHitex	0:35c1800c59e6	34
DavidGilesHitex	0:35c1800c59e6	35
DavidGilesHitex	0:35c1800c59e6	36	/* Wave File Checker */
DavidGilesHitex	0:35c1800c59e6	37	uint8_t wave_file_check(uint8_t wave_array, FILE open_file)
DavidGilesHitex	0:35c1800c59e6	38	{
DavidGilesHitex	0:35c1800c59e6	39	uint8_t brk_flag = 0u;
DavidGilesHitex	0:35c1800c59e6	40	uint8_t x = 0u;
DavidGilesHitex	0:35c1800c59e6	41	uint8_t valid_sample = 0u;
DavidGilesHitex	0:35c1800c59e6	42	sint16_t ch = 0;
DavidGilesHitex	0:35c1800c59e6	43
DavidGilesHitex	0:35c1800c59e6	44	pc.printf("\n\rPrinting out.WAV file header...\n\r");
DavidGilesHitex	0:35c1800c59e6	45
DavidGilesHitex	0:35c1800c59e6	46	for (x = 0; x < 0x2bu; x++) /* Read the first 0x2b bytes of the file as this is the haeder informtation relating to sample rate etc. */
DavidGilesHitex	0:35c1800c59e6	47	{
DavidGilesHitex	0:35c1800c59e6	48	ch = fgetc(open_file); /* Get the first byte from the file */
DavidGilesHitex	0:35c1800c59e6	49	if (ch == EOF) /* Check for eof */
DavidGilesHitex	0:35c1800c59e6	50	{
DavidGilesHitex	0:35c1800c59e6	51	pc.printf(" File too short to be a wave file\n\r"); /* If we have less than 0x2b then file is not a wave file. */
DavidGilesHitex	0:35c1800c59e6	52	valid_sample = 0u;
DavidGilesHitex	0:35c1800c59e6	53	brk_flag = 1u;
DavidGilesHitex	0:35c1800c59e6	54	}
DavidGilesHitex	0:35c1800c59e6	55	else{
DavidGilesHitex	0:35c1800c59e6	56	wave_array[x] = ch; /* Load data in to header file array */
DavidGilesHitex	0:35c1800c59e6	57	}
DavidGilesHitex	0:35c1800c59e6	58
DavidGilesHitex	0:35c1800c59e6	59	if (brk_flag == 1u)
DavidGilesHitex	0:35c1800c59e6	60	{
DavidGilesHitex	0:35c1800c59e6	61	break;
DavidGilesHitex	0:35c1800c59e6	62	}
DavidGilesHitex	0:35c1800c59e6	63	}
DavidGilesHitex	0:35c1800c59e6	64
DavidGilesHitex	0:35c1800c59e6	65	if (brk_flag == 0u) /* OK we have downloaded the header into an Array. Lets check to see if its a valid file */
DavidGilesHitex	0:35c1800c59e6	66	{
DavidGilesHitex	0:35c1800c59e6	67	pc.printf(" Identification block (4 ASCII bytes)= "); /* First 4 bytes are header block */
DavidGilesHitex	0:35c1800c59e6	68	for (x = 0u; x < 4; x++)
DavidGilesHitex	0:35c1800c59e6	69	{
DavidGilesHitex	0:35c1800c59e6	70	pc.putc(wave_array[x]); /* and write them on the screen */
DavidGilesHitex	0:35c1800c59e6	71	wave_file_info.identification_block[x] = wave_array[x];
DavidGilesHitex	0:35c1800c59e6	72	}
DavidGilesHitex	0:35c1800c59e6	73	wave_file_info.identification_block[4] = 0; /* add the string terminator on the end */
DavidGilesHitex	0:35c1800c59e6	74	pc.printf(" '%s'\n\r", wave_file_info.identification_block);
DavidGilesHitex	0:35c1800c59e6	75
DavidGilesHitex	0:35c1800c59e6	76
DavidGilesHitex	0:35c1800c59e6	77	pc.printf(" Length of file (4 bytes) = "); /* Length of file. */
DavidGilesHitex	0:35c1800c59e6	78	for (x = 4u; x < 8u; x++)
DavidGilesHitex	0:35c1800c59e6	79	{
DavidGilesHitex	0:35c1800c59e6	80	pc.printf("%d ",wave_array[x]);
DavidGilesHitex	0:35c1800c59e6	81	}
DavidGilesHitex	0:35c1800c59e6	82	wave_file_info.length_of_file = ( ((uint32_t) wave_array[7] << 24)
DavidGilesHitex	0:35c1800c59e6	83	+ ((uint32_t) wave_array[6] << 16)
DavidGilesHitex	0:35c1800c59e6	84	+ ((uint32_t) wave_array[5] << 8)
DavidGilesHitex	0:35c1800c59e6	85	+ ((uint32_t) wave_array[4]) );
DavidGilesHitex	0:35c1800c59e6	86	pc.printf(" = %d bytes\n\r", wave_file_info.length_of_file);
DavidGilesHitex	0:35c1800c59e6	87
DavidGilesHitex	0:35c1800c59e6	88
DavidGilesHitex	0:35c1800c59e6	89	pc.printf(" Identifier (4 ASCII bytes) = "); /* indentifier string1 */
DavidGilesHitex	0:35c1800c59e6	90	for (x = 8u; x < 12u; x++)
DavidGilesHitex	0:35c1800c59e6	91	{
DavidGilesHitex	0:35c1800c59e6	92	pc.putc(wave_array[x]); /* and write them on the screen */
DavidGilesHitex	0:35c1800c59e6	93	wave_file_info.identifier1[x-8] = wave_array[x];
DavidGilesHitex	0:35c1800c59e6	94	}
DavidGilesHitex	0:35c1800c59e6	95	wave_file_info.identification_block[4] = 0; /* add the string terminator on the end */
DavidGilesHitex	0:35c1800c59e6	96	pc.printf(" '%s'\n\r", wave_file_info.identifier1);
DavidGilesHitex	0:35c1800c59e6	97
DavidGilesHitex	0:35c1800c59e6	98
DavidGilesHitex	0:35c1800c59e6	99	pc.printf(" Identifier (4 ASCII bytes) = "); /* Identifier String 2 */
DavidGilesHitex	0:35c1800c59e6	100	for (x = 12; x < 16u; x++)
DavidGilesHitex	0:35c1800c59e6	101	{
DavidGilesHitex	0:35c1800c59e6	102	pc.putc(wave_array[x]); /* and write them on the screen */
DavidGilesHitex	0:35c1800c59e6	103	wave_file_info.identifier2[x-12] = wave_array[x];
DavidGilesHitex	0:35c1800c59e6	104	}
DavidGilesHitex	0:35c1800c59e6	105	wave_file_info.identifier2[4] = 0; /* add the string terminator on the end */
DavidGilesHitex	0:35c1800c59e6	106	pc.printf(" '%s'\n\r", wave_file_info.identifier2);
DavidGilesHitex	0:35c1800c59e6	107
DavidGilesHitex	0:35c1800c59e6	108
DavidGilesHitex	0:35c1800c59e6	109	pc.printf(" Position of data (4 bytes) = "); /* Position of data */
DavidGilesHitex	0:35c1800c59e6	110	for (x = 16u; x < 20u; x++)
DavidGilesHitex	0:35c1800c59e6	111	{
DavidGilesHitex	0:35c1800c59e6	112	pc.printf("%d ",wave_array[x]);
DavidGilesHitex	0:35c1800c59e6	113	}
DavidGilesHitex	0:35c1800c59e6	114	wave_file_info.position_of_data = ( ((uint32_t) wave_array[19] << 24)
DavidGilesHitex	0:35c1800c59e6	115	+ ((uint32_t) wave_array[18] << 16)
DavidGilesHitex	0:35c1800c59e6	116	+ ((uint32_t) wave_array[17] << 8)
DavidGilesHitex	0:35c1800c59e6	117	+ ((uint32_t) wave_array[16]) );
DavidGilesHitex	0:35c1800c59e6	118	pc.printf(" = %d\n\r", wave_file_info.position_of_data);
DavidGilesHitex	0:35c1800c59e6	119
DavidGilesHitex	0:35c1800c59e6	120
DavidGilesHitex	0:35c1800c59e6	121	pc.printf(" Format Tag - Always 1 for Wave PCM (2 bytes) = "); /* format tag */
DavidGilesHitex	0:35c1800c59e6	122	for (x = 20u; x < 22u; x++)
DavidGilesHitex	0:35c1800c59e6	123	{
DavidGilesHitex	0:35c1800c59e6	124	pc.printf("%d ",wave_array[x]);
DavidGilesHitex	0:35c1800c59e6	125	}
DavidGilesHitex	0:35c1800c59e6	126	wave_file_info.format_tag = ( ((uint32_t) wave_array[21] << 8)
DavidGilesHitex	0:35c1800c59e6	127	+ ((uint32_t) wave_array[20]) );
DavidGilesHitex	0:35c1800c59e6	128	pc.printf(" = %d\n\r", wave_file_info.format_tag);
DavidGilesHitex	0:35c1800c59e6	129
DavidGilesHitex	0:35c1800c59e6	130
DavidGilesHitex	0:35c1800c59e6	131	pc.printf(" Number of channels (2 bytes) = "); /* Number of channels, mono or steroeo */
DavidGilesHitex	0:35c1800c59e6	132	for (x = 22u; x < 24u; x++)
DavidGilesHitex	0:35c1800c59e6	133	{
DavidGilesHitex	0:35c1800c59e6	134	pc.printf("%d ",wave_array[x]);
DavidGilesHitex	0:35c1800c59e6	135	}
DavidGilesHitex	0:35c1800c59e6	136	wave_file_info.number_of_channels = ( ((uint32_t) wave_array[23] << 8)
DavidGilesHitex	0:35c1800c59e6	137	+ ((uint32_t) wave_array[22]) );
DavidGilesHitex	0:35c1800c59e6	138	pc.printf(" = %d channel(s)\n\r", wave_file_info.number_of_channels);
DavidGilesHitex	0:35c1800c59e6	139
DavidGilesHitex	0:35c1800c59e6	140
DavidGilesHitex	0:35c1800c59e6	141	pc.printf(" Samples per second (4 bytes) = "); /* Samples per second */
DavidGilesHitex	0:35c1800c59e6	142	for (x = 24u; x < 28u; x++)
DavidGilesHitex	0:35c1800c59e6	143	{
DavidGilesHitex	0:35c1800c59e6	144	pc.printf("%d ",wave_array[x]);
DavidGilesHitex	0:35c1800c59e6	145	}
DavidGilesHitex	0:35c1800c59e6	146	wave_file_info.samples_per_second =( ((uint32_t) wave_array[27] << 24)
DavidGilesHitex	0:35c1800c59e6	147	+ ((uint32_t) wave_array[26] << 16)
DavidGilesHitex	0:35c1800c59e6	148	+ ((uint32_t) wave_array[25] << 8)
DavidGilesHitex	0:35c1800c59e6	149	+ ((uint32_t) wave_array[24]) );
DavidGilesHitex	0:35c1800c59e6	150	pc.printf(" = %d samples per sec\n\r", wave_file_info.samples_per_second);
DavidGilesHitex	0:35c1800c59e6	151
DavidGilesHitex	0:35c1800c59e6	152
DavidGilesHitex	0:35c1800c59e6	153	pc.printf(" Bytes Per Second (4 bytes) = "); /* Bytes per second */
DavidGilesHitex	0:35c1800c59e6	154	for (x = 28u; x < 32u; x++)
DavidGilesHitex	0:35c1800c59e6	155	{
DavidGilesHitex	0:35c1800c59e6	156	pc.printf("%d ",wave_array[x]);
DavidGilesHitex	0:35c1800c59e6	157	}
DavidGilesHitex	0:35c1800c59e6	158	wave_file_info.bytes_per_second = ( ((uint32_t) wave_array[31] << 24)
DavidGilesHitex	0:35c1800c59e6	159	+ ((uint32_t) wave_array[30] << 16)
DavidGilesHitex	0:35c1800c59e6	160	+ ((uint32_t) wave_array[29] << 8)
DavidGilesHitex	0:35c1800c59e6	161	+ ((uint32_t) wave_array[28]) );
DavidGilesHitex	0:35c1800c59e6	162	pc.printf(" = %d bytes per sec\n\r", wave_file_info.bytes_per_second);
DavidGilesHitex	0:35c1800c59e6	163
DavidGilesHitex	0:35c1800c59e6	164
DavidGilesHitex	0:35c1800c59e6	165	pc.printf(" Bytes Per Sample (2 bytes) = "); /* Bytes per sample */
DavidGilesHitex	0:35c1800c59e6	166	for (x = 32u; x < 34u; x++)
DavidGilesHitex	0:35c1800c59e6	167	{
DavidGilesHitex	0:35c1800c59e6	168	pc.printf("%d ",wave_array[x]);
DavidGilesHitex	0:35c1800c59e6	169	}
DavidGilesHitex	0:35c1800c59e6	170	wave_file_info.bytes_per_sample = ( ((uint32_t) wave_array[33] << 8)
DavidGilesHitex	0:35c1800c59e6	171	+ ((uint32_t) wave_array[32]) );
DavidGilesHitex	0:35c1800c59e6	172	pc.printf(" = %d bytes\n\r", wave_file_info.bytes_per_sample);
DavidGilesHitex	0:35c1800c59e6	173
DavidGilesHitex	0:35c1800c59e6	174
DavidGilesHitex	0:35c1800c59e6	175	pc.printf(" Bits Per Sample (2 bytes) = "); /* Bits per sample */
DavidGilesHitex	0:35c1800c59e6	176	for (x = 34u; x < 36u; x++)
DavidGilesHitex	0:35c1800c59e6	177	{
DavidGilesHitex	0:35c1800c59e6	178	pc.printf("%d ",wave_array[x]);
DavidGilesHitex	0:35c1800c59e6	179	}
DavidGilesHitex	0:35c1800c59e6	180	wave_file_info.bits_per_sample = ( ((uint32_t) wave_array[35] << 8)
DavidGilesHitex	0:35c1800c59e6	181	+ ((uint32_t) wave_array[34]) );
DavidGilesHitex	0:35c1800c59e6	182	pc.printf(" = %d bits\n\r", wave_file_info.bits_per_sample);
DavidGilesHitex	0:35c1800c59e6	183
DavidGilesHitex	0:35c1800c59e6	184
DavidGilesHitex	0:35c1800c59e6	185	pc.printf(" Marker (4 ASCII bytes) = "); /* Marker */
DavidGilesHitex	0:35c1800c59e6	186	for (x = 36u; x < 40u; x++)
DavidGilesHitex	0:35c1800c59e6	187	{
DavidGilesHitex	0:35c1800c59e6	188	pc.putc(wave_array[x]);
DavidGilesHitex	0:35c1800c59e6	189	wave_file_info.marker[x-36] = wave_array[x];
DavidGilesHitex	0:35c1800c59e6	190	}
DavidGilesHitex	0:35c1800c59e6	191	wave_file_info.marker[4] = 0;
DavidGilesHitex	0:35c1800c59e6	192	pc.printf(" '%s'\n\r", wave_file_info.marker);
DavidGilesHitex	0:35c1800c59e6	193
DavidGilesHitex	0:35c1800c59e6	194
DavidGilesHitex	0:35c1800c59e6	195	pc.printf(" The number of bits in the sample (4 bytes) = "); /* Number of bits per sample. */
DavidGilesHitex	0:35c1800c59e6	196	for (x = 40u; x < 44u; x++)
DavidGilesHitex	0:35c1800c59e6	197	{
DavidGilesHitex	0:35c1800c59e6	198	pc.printf("%d ",wave_array[x]);
DavidGilesHitex	0:35c1800c59e6	199	}
DavidGilesHitex	0:35c1800c59e6	200	wave_file_info.number_of_bits_in_sample = ( ((uint32_t) wave_array[43] << 24)
DavidGilesHitex	0:35c1800c59e6	201	+ ((uint32_t) wave_array[42] << 16)
DavidGilesHitex	0:35c1800c59e6	202	+ ((uint32_t) wave_array[41] << 8)
DavidGilesHitex	0:35c1800c59e6	203	+ ((uint32_t) wave_array[40]) );
DavidGilesHitex	0:35c1800c59e6	204	pc.printf(" = %d bits\n\r", wave_file_info.number_of_bits_in_sample);
DavidGilesHitex	0:35c1800c59e6	205
DavidGilesHitex	0:35c1800c59e6	206
DavidGilesHitex	0:35c1800c59e6	207	/* Check for valid Wave file */
DavidGilesHitex	0:35c1800c59e6	208	if (((wave_array[0] == 'R') && (wave_array[1] == 'I') && (wave_array[2] == 'F') && (wave_array[3] == 'F'))
DavidGilesHitex	0:35c1800c59e6	209	&& ((wave_array[8] == 'W') && (wave_array[9] == 'A') && (wave_array[0x0a] == 'V') && (wave_array[0x0b] == 'E'))
DavidGilesHitex	0:35c1800c59e6	210	&& ((wave_array[0x0c] == 'f') && (wave_array[0x0d] == 'm') && (wave_array[0x0e] == 't') && (wave_array[0x0f] == ' '))
DavidGilesHitex	0:35c1800c59e6	211	&& (wave_array[0x14] == 0x01)) valid_sample = 1u;
DavidGilesHitex	0:35c1800c59e6	212	}
DavidGilesHitex	0:35c1800c59e6	213
DavidGilesHitex	0:35c1800c59e6	214	pc.printf("Finished examining the .WAV file header\n\r");
DavidGilesHitex	0:35c1800c59e6	215	if (valid_sample == 1)
DavidGilesHitex	0:35c1800c59e6	216	{
DavidGilesHitex	0:35c1800c59e6	217	pc.printf("Sample is a valid .WAV sample file\n\n\r");
DavidGilesHitex	0:35c1800c59e6	218	}
DavidGilesHitex	0:35c1800c59e6	219	else{
DavidGilesHitex	0:35c1800c59e6	220	pc.printf("Sample is a NOT a valid .WAV sample file\n\n\r");
DavidGilesHitex	0:35c1800c59e6	221	}
DavidGilesHitex	0:35c1800c59e6	222
DavidGilesHitex	0:35c1800c59e6	223	return valid_sample;
DavidGilesHitex	0:35c1800c59e6	224	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	19 Nov 2010
Imports:	78
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	2
Followers:	2

SourceFiles/Wav_Support_File.cpp@0:35c1800c59e6, 2010-11-19 (annotated)

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