static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale) { int v; int i = 0; uint8_t state[CONTEXT_SIZE]; memset(state, 128, sizeof(state)); for (v = 0; i < 128; v++) { unsigned len = get_symbol(c, state, 0) + 1; if (len > 128 - i) return AVERROR_INVALIDDATA; while (len--) { quant_table[i] = scale * v; i++; } } for (i = 1; i < 128; i++) quant_table[256 - i] = -quant_table[i]; quant_table[128] = -quant_table[127]; return 2 * v - 1; }