static int init_decoder(int32_t fmtp[12]) {
alac_file *alac;
frame_size = fmtp[1]; // stereo samples
sampling_rate = fmtp[11];
int sample_size = fmtp[3];
if (sample_size != 16)
die("only 16-bit samples supported!");
alac = alac_create(sample_size, 2);
if (!alac)
return 1;
decoder_info = alac;
alac->setinfo_max_samples_per_frame = frame_size;
alac->setinfo_7a = fmtp[2];
alac->setinfo_sample_size = sample_size;
alac->setinfo_rice_historymult = fmtp[4];
alac->setinfo_rice_initialhistory = fmtp[5];
alac->setinfo_rice_kmodifier = fmtp[6];
alac->setinfo_7f = fmtp[7];
alac->setinfo_80 = fmtp[8];
alac->setinfo_82 = fmtp[9];
alac->setinfo_86 = fmtp[10];
alac->setinfo_8a_rate = fmtp[11];
alac_allocate_buffers(alac);
return 0;
}
JNIEXPORT void JNICALL Java_com_realtek_cast_util_Alac_setupAlac(JNIEnv* env, jclass clazz,
jint frameSize, jint i7a, jint sampleSize, jint riceHistoryMult, jint riceInitHistory, jint riceKModifier, jint i7f, jint i80, jint i82, jint i86, jint i8a) {
s_alac->setinfo_max_samples_per_frame = (uint32_t)frameSize;
s_alac->setinfo_7a = (uint8_t)i7a;
s_alac->setinfo_sample_size = (uint8_t)sampleSize;
s_alac->setinfo_rice_historymult = (uint8_t)riceHistoryMult;
s_alac->setinfo_rice_initialhistory = (uint8_t)riceInitHistory;
s_alac->setinfo_rice_kmodifier = (uint8_t)riceKModifier;
s_alac->setinfo_7f = (uint8_t)i7f;
s_alac->setinfo_80 = (uint16_t)i80;
s_alac->setinfo_82 = (uint32_t)i82;
s_alac->setinfo_86 = (uint32_t)i86;
s_alac->setinfo_8a_rate = (uint32_t)i8a;
alac_allocate_buffers(s_alac);
}
void alac_set_info(alac_file *alac, char *inputbuffer)
{
char *ptr = inputbuffer;
ptr += 4; /* size */
ptr += 4; /* frma */
ptr += 4; /* alac */
ptr += 4; /* size */
ptr += 4; /* alac */
ptr += 4; /* 0 ? */
alac->setinfo_max_samples_per_frame = *(uint32_t*)ptr; /* buffer size / 2 ? */
if (!host_bigendian)
_Swap32(alac->setinfo_max_samples_per_frame);
ptr += 4;
alac->setinfo_7a = *(uint8_t*)ptr;
ptr += 1;
alac->setinfo_sample_size = *(uint8_t*)ptr;
ptr += 1;
alac->setinfo_rice_historymult = *(uint8_t*)ptr;
ptr += 1;
alac->setinfo_rice_initialhistory = *(uint8_t*)ptr;
ptr += 1;
alac->setinfo_rice_kmodifier = *(uint8_t*)ptr;
ptr += 1;
alac->setinfo_7f = *(uint8_t*)ptr;
ptr += 1;
alac->setinfo_80 = *(uint16_t*)ptr;
if (!host_bigendian)
_Swap16(alac->setinfo_80);
ptr += 2;
alac->setinfo_82 = *(uint32_t*)ptr;
if (!host_bigendian)
_Swap32(alac->setinfo_82);
ptr += 4;
alac->setinfo_86 = *(uint32_t*)ptr;
if (!host_bigendian)
_Swap32(alac->setinfo_86);
ptr += 4;
alac->setinfo_8a_rate = *(uint32_t*)ptr;
if (!host_bigendian)
_Swap32(alac->setinfo_8a_rate);
alac_allocate_buffers(alac);
}