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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "audio_types.h"
static const struct audio_types_info support_types[AUDIO_TYPE_MAX] = {
{"wav", 44}
};
static const char
audio_format_name[AUDIO_FORMAT_MAX][MAX_AUDIO_FORMAT_LEN] = {
"U8",
"A_LAW",
"MU_LAW",
"S16_LE",
"S16_BE",
"FLOAT32_LE",
"FLOAT32_BE",
"S32_LE",
"S32_BE",
"S24_LE",
"S24_BE",
"S24_32LE",
"S24_32BE"
};
struct wav_header *init_wav_header(struct wav_header *header,
uint32_t size, uint16_t audioFormat, uint16_t numChannels,
uint32_t sampleRate, uint32_t bitsPerSample)
{
header->chunkId = 0x46464952; // = "RIFF"
header->chunkSize = size - 8;
header->format = 0x45564157; // = "WAVE"
header->subchunk1Id = 0x20746d66; // = "fmt "
header->subchunk1Size = 16;
header->audioFormat = audioFormat;
header->numChannels = numChannels;
header->sampleRate = sampleRate;
header->byteRate = sampleRate * numChannels * (bitsPerSample/8);
header->blockAlign = numChannels * (bitsPerSample/8);
header->bitsPerSample = bitsPerSample;
header->subchunk2Id = 0x61746164; // = "data"
header->subchunk2Size = size - 44;
return header;
}
int checkAudioType(char *source)
{
int i;
for(i = 0; i < AUDIO_TYPE_MAX; i++) {
if(strcmp(source, support_types[i].name) == 0) {
return i;
}
}
return AUDIO_TYPE_NONE;
}
char *getAllAudioTypes()
{
int i;
char *dest = malloc(sizeof(char) * MAX_AUDIO_TYPE_LEN *
AUDIO_TYPE_MAX + sizeof(char));
char *str = dest;
for(i = 0; i < AUDIO_TYPE_MAX; i++) {
str += sprintf(str, " %s", support_types[i].name);
}
return dest;
}
off_t getOffset(int format)
{
return support_types[format].rsv_bytes;
}
int checkAudioFormat(char *source)
{
int i;
for(i = 0; i < AUDIO_FORMAT_MAX; i++) {
if(strcmp(source, audio_format_name[i]) == 0) {
return i;
}
}
return PA_SAMPLE_INVALID;
}
char *getAllAudioFormats()
{
int i;
char *dest = malloc(sizeof(char) * MAX_AUDIO_FORMAT_LEN *
AUDIO_FORMAT_MAX + sizeof(char));
char *str = dest;
for(i = 0; i < AUDIO_FORMAT_MAX; i++) {
str += sprintf(str, " %s", audio_format_name[i]);
}
return dest;
}
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