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#include <string.h>
#include "audio_types.h"
static const struct audio_types_info support_types[] = {
{"wav", 44}, // AUDIO_TYPE_WAVE
{NULL, 0}
};
static const struct audio_formats_info support_formats[] = {
{"U8", PA_SAMPLE_U8},
{"A_LAW", PA_SAMPLE_ALAW},
{"MU_LAW", PA_SAMPLE_ULAW},
{"S16_LE", PA_SAMPLE_S16LE},
{"S16_BE", PA_SAMPLE_S16BE},
{"FLOAT32_LE", PA_SAMPLE_FLOAT32LE},
{"FLOAT32_BE", PA_SAMPLE_FLOAT32BE},
{"S32_LE", PA_SAMPLE_S32LE},
{"S32_BE", PA_SAMPLE_S32BE},
{"S24_LE", PA_SAMPLE_S24LE},
{"S24_BE", PA_SAMPLE_S24BE},
{"S24_32LE", PA_SAMPLE_S24_32LE},
{"S24_32BE", PA_SAMPLE_S24_32BE},
{NULL, 0}
};
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; support_types[i].name != NULL; i++) {
if(strcmp(source, support_types[i].name) == 0) {
return i;
}
}
return AUDIO_TYPE_NONE;
}
off_t getOffset(int format)
{
return support_types[format].rsv_bytes;
}
pa_sample_format_t checkAudioFormat(char *source)
{
int i;
for(i = 0; support_formats[i].name != NULL; i++) {
if(strcmp(source, support_formats[i].name) == 0) {
return support_formats[i].pa_format;
}
}
return PA_SAMPLE_INVALID;
}
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