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TAV/TAD doc update

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minjaesong
2025-11-10 17:01:44 +09:00
parent edb951fb1a
commit c1d6a959f5
18 changed files with 512 additions and 423 deletions
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12
video_encoder/range_coder.c
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@@ -21,7 +21,7 @@ static inline uint8_t range_decoder_get_byte(RangeDecoder *dec) {
return 0;
}
static void range_encoder_renormalize(RangeEncoder *enc) {
static void range_encoder_renormalise(RangeEncoder *enc) {
while (enc->range <= BOTTOM_VALUE) {
range_encoder_put_byte(enc, (enc->low >> 24) & 0xFF);
enc->low <<= 8;
@@ -29,7 +29,7 @@ static void range_encoder_renormalize(RangeEncoder *enc) {
}
}
static void range_decoder_renormalize(RangeDecoder *dec) {
static void range_decoder_renormalise(RangeDecoder *dec) {
while (dec->range <= BOTTOM_VALUE) {
dec->code = (dec->code << 8) | range_decoder_get_byte(dec);
dec->low <<= 8;
@@ -66,7 +66,7 @@ void range_encode_int16_laplacian(RangeEncoder *enc, int16_t value, int16_t max_
double cdf_low = (value == -max_abs_value) ? 0.0 : laplacian_cdf(value - 1, lambda);
double cdf_high = laplacian_cdf(value, lambda);
// Normalize to get cumulative counts in range [0, SCALE]
// Normalise to get cumulative counts in range [0, SCALE]
const uint32_t SCALE = 0x10000; // 65536 for precision
uint32_t cum_low = (uint32_t)(cdf_low * SCALE);
uint32_t cum_high = (uint32_t)(cdf_high * SCALE);
@@ -80,7 +80,7 @@ void range_encode_int16_laplacian(RangeEncoder *enc, int16_t value, int16_t max_
enc->low += (uint32_t)((range_64 * cum_low) / SCALE);
enc->range = (uint32_t)((range_64 * (cum_high - cum_low)) / SCALE);
range_encoder_renormalize(enc);
range_encoder_renormalise(enc);
}
size_t range_encoder_finish(RangeEncoder *enc) {
@@ -137,7 +137,7 @@ int16_t range_decode_int16_laplacian(RangeDecoder *dec, int16_t max_abs_value, f
dec->low += (uint32_t)((range_64 * cum_low) / SCALE);
dec->range = (uint32_t)((range_64 * (cum_high - cum_low)) / SCALE);
range_decoder_renormalize(dec);
range_decoder_renormalise(dec);
return value;
} else if (cum_freq < cum_low) {
high = mid - 1;
@@ -147,6 +147,6 @@ int16_t range_decode_int16_laplacian(RangeDecoder *dec, int16_t max_abs_value, f
}
// Fallback: shouldn't happen with correct encoding
range_decoder_renormalize(dec);
range_decoder_renormalise(dec);
return value;
}