Flipper/Applications/Official/source-OLDER/kyhwana/wav_player/wav_parser.c

85 lines
2.2 KiB
C

#include "wav_parser.h"
#define TAG "WavParser"
const char* format_text(FormatTag tag) {
switch(tag) {
case FormatTagPCM:
return "PCM";
case FormatTagIEEE_FLOAT:
return "IEEE FLOAT";
default:
return "Unknown";
}
};
struct WavParser {
WavHeaderChunk header;
WavFormatChunk format;
WavDataChunk data;
size_t wav_data_start;
size_t wav_data_end;
};
WavParser* wav_parser_alloc() {
return malloc(sizeof(WavParser));
}
void wav_parser_free(WavParser* parser) {
free(parser);
}
bool wav_parser_parse(WavParser* parser, Stream* stream) {
stream_read(stream, (uint8_t*)&parser->header, sizeof(WavHeaderChunk));
stream_read(stream, (uint8_t*)&parser->format, sizeof(WavFormatChunk));
stream_read(stream, (uint8_t*)&parser->data, sizeof(WavDataChunk));
if(memcmp(parser->header.riff, "RIFF", 4) != 0 ||
memcmp(parser->header.wave, "WAVE", 4) != 0) {
FURI_LOG_E(TAG, "WAV: wrong header");
return false;
}
if(memcmp(parser->format.fmt, "fmt ", 4) != 0) {
FURI_LOG_E(TAG, "WAV: wrong format");
return false;
}
if(parser->format.tag != FormatTagPCM || memcmp(parser->data.data, "data", 4) != 0) {
FURI_LOG_E(
TAG,
"WAV: non-PCM format %u, next '%lu'",
parser->format.tag,
(uint32_t)parser->data.data);
return false;
}
FURI_LOG_I(
TAG,
"Format tag: %s, ch: %u, smplrate: %lu, bps: %lu, bits: %u",
format_text(parser->format.tag),
parser->format.channels,
parser->format.sample_rate,
parser->format.byte_per_sec,
parser->format.bits_per_sample);
parser->wav_data_start = stream_tell(stream);
parser->wav_data_end = parser->wav_data_start + parser->data.size;
FURI_LOG_I(TAG, "data: %u - %u", parser->wav_data_start, parser->wav_data_end);
return true;
}
size_t wav_parser_get_data_start(WavParser* parser) {
return parser->wav_data_start;
}
size_t wav_parser_get_data_end(WavParser* parser) {
return parser->wav_data_end;
}
size_t wav_parser_get_data_len(WavParser* parser) {
return parser->wav_data_end - parser->wav_data_start;
}