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skip any chunks between fmt and data

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This commit is contained in:
Marshall Miller 2025-01-26 17:04:09 -05:00
parent c3989b28e1
commit b0b3a2d412
1 changed files with 27 additions and 16 deletions
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43
shared-module/audiocore/WaveFile.c
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@ -75,25 +75,36 @@ void common_hal_audioio_wavefile_construct(audioio_wavefile_obj_t *self,
self->channel_count = format.num_channels;
self->bits_per_sample = format.bits_per_sample;
// TODO(tannewt): Skip any extra chunks that occur before the data section.
uint8_t chunk_tag[4];
uint32_t chunk_length;
bool found_data_chunk = false;
uint8_t data_tag[4];
if (f_read(&self->file->fp, &data_tag, 4, &bytes_read) != FR_OK) {
mp_raise_OSError(MP_EIO);
}
if (bytes_read != 4 ||
memcmp((uint8_t *)data_tag, "data", 4) != 0) {
mp_raise_ValueError(MP_ERROR_TEXT("Data chunk must follow fmt chunk"));
while (!found_data_chunk) {
if (f_read(&self->file->fp, &chunk_tag, 4, &bytes_read) != FR_OK) {
mp_raise_OSError(MP_EIO);
}
if (bytes_read != 4) {
mp_raise_OSError(MP_EIO);
}
if (memcmp((uint8_t *)chunk_tag, "data", 4) == 0) {
found_data_chunk = true;
}
if (f_read(&self->file->fp, &chunk_length, 4, &bytes_read) != FR_OK) {
mp_raise_OSError(MP_EIO);
}
if (bytes_read != 4) {
mp_raise_OSError(MP_EIO);
}
if (!found_data_chunk) {
if (f_lseek(&self->file->fp, f_tell(&self->file->fp) + chunk_length) != FR_OK) {
mp_raise_OSError(MP_EIO);
}
}
}
uint32_t data_length;
if (f_read(&self->file->fp, &data_length, 4, &bytes_read) != FR_OK) {
mp_raise_OSError(MP_EIO);
}
if (bytes_read != 4) {
mp_arg_error_invalid(MP_QSTR_file);
}
self->file_length = data_length;
self->file_length = chunk_length;
self->data_start = self->file->fp.fptr;
// Try to allocate two buffers, one will be loaded from file and the other