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Merge pull request #9983 from marcelofg55/ieee32_float 

Implement 32 bit IEEE float WAVE format
This commit is contained in:
Rémi Verschelde 2017-08-08 10:03:33 +02:00 committed by GitHub
parent ee7e649e69 4e7739ebb6
commit 69f650f98f
1 changed files with 34 additions and 29 deletions
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63
scene/io/resource_format_wav.cpp
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@ -72,6 +72,7 @@ RES ResourceFormatLoaderWAV::load(const String &p_path, const String &p_original
ERR_FAIL_V(RES());
}
uint16_t compression_code = 1;
bool format_found = false;
bool data_found = false;
int format_bits = 0;
@ -102,9 +103,8 @@ RES ResourceFormatLoaderWAV::load(const String &p_path, const String &p_original
if (chunkID[0] == 'f' && chunkID[1] == 'm' && chunkID[2] == 't' && chunkID[3] == ' ' && !format_found) {
/* IS FORMAT CHUNK */
uint16_t compression_code = file->get_16();
if (compression_code != 1) {
compression_code = file->get_16();
if (compression_code != 1 && compression_code != 3) {
ERR_PRINT("Format not supported for WAVE file (not PCM). Save WAVE files as uncompressed PCM instead.");
break;
}
@ -167,38 +167,43 @@ RES ResourceFormatLoaderWAV::load(const String &p_path, const String &p_original
DVector<uint8_t>::Write dataw = data.write();
void *data_ptr = dataw.ptr();
for (int i = 0; i < frames; i++) {
if (format_bits == 8) {
int8_t *data_ptr8 = (int8_t *)data_ptr;
for (int i = 0; i < frames * format_channels; i++) {
// 8 bit samples are UNSIGNED
for (int c = 0; c < format_channels; c++) {
uint8_t s = file->get_8();
data_ptr8[i] = (int8_t)(s-128);
}
} else if (format_bits == 32 && compression_code == 3) {
int16_t *data_ptr16 = (int16_t *)data_ptr;
for (int i = 0; i < frames * format_channels; i++) {
//32 bit IEEE Float
if (format_bits == 8) {
// 8 bit samples are UNSIGNED
float s = file->get_float();
data_ptr16[i] = (int32_t)(s * 32768.f);
}
} else if (format_bits == 16) {
int16_t *data_ptr16 = (int16_t *)data_ptr;
for (int i = 0; i < frames * format_channels; i++) {
//16 bit SIGNED
uint8_t s = file->get_8();
s -= 128;
int8_t *sp = (int8_t *)&s;
data_ptr16[i] = file->get_16();
}
} else {
int16_t *data_ptr16 = (int16_t *)data_ptr;
for (int i = 0; i < frames * format_channels; i++) {
//16+ bits samples are SIGNED
// if sample is > 16 bits, just read extra bytes
int8_t *data_ptr8 = &((int8_t *)data_ptr)[i * format_channels + c];
uint32_t s = 0;
for (int b = 0; b < (format_bits >> 3); b++) {
*data_ptr8 = *sp;
} else {
//16+ bits samples are SIGNED
// if sample is > 16 bits, just read extra bytes
uint32_t data = 0;
for (int b = 0; b < (format_bits >> 3); b++) {
data |= ((uint32_t)file->get_8()) << (b * 8);
}
data <<= (32 - format_bits);
int32_t s = data;
int16_t *data_ptr16 = &((int16_t *)data_ptr)[i * format_channels + c];
*data_ptr16 = s >> 16;
s |= ((uint32_t)file->get_8()) << (b * 8);
}
s <<= (32 - format_bits);
data_ptr16[i] = s >> 16;
}
}