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[api] Add (inline_encode) proto option for sub-message inlining

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Add a new message-level option (inline_encode) that causes the code
generator to inline sub-message encoding directly into the parent's
encode/calculate_size methods instead of going through the
encode_sub_message function pointer indirection.

When set on a sub-message type, the generator:
- Inlines field encoding directly (no function pointer, no backpatch overhead)
- Inlines size calculation (no separate method call)
- Skips generating standalone encode/calculate_size methods
- Validates at generation time that max encoded size < 128 bytes

Applied to BluetoothLERawAdvertisement which is encoded 12 times per
BLE advertisement batch in a hot loop.
This commit is contained in:
J. Nick Koston
2026-04-08 23:06:41 -10:00
parent eafc5df3f2
commit 4d4b77f9fc
5 changed files with 299 additions and 45 deletions
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esphome/components/api/api_pb2.cpp
+27 -25
View File
@@ -2328,40 +2328,42 @@ bool SubscribeBluetoothLEAdvertisementsRequest::decode_varint(uint32_t field_id,
}
return true;
}
uint8_t *BluetoothLERawAdvertisement::encode(ProtoWriteBuffer &buffer PROTO_ENCODE_DEBUG_PARAM) const {
uint8_t *__restrict__ pos = buffer.get_pos();
ProtoEncode::write_raw_byte(pos PROTO_ENCODE_DEBUG_ARG, 8);
ProtoEncode::encode_varint_raw_64(pos PROTO_ENCODE_DEBUG_ARG, this->address);
ProtoEncode::write_raw_byte(pos PROTO_ENCODE_DEBUG_ARG, 16);
ProtoEncode::encode_varint_raw_short(pos PROTO_ENCODE_DEBUG_ARG, encode_zigzag32(this->rssi));
if (this->address_type) {
ProtoEncode::write_raw_byte(pos PROTO_ENCODE_DEBUG_ARG, 24);
ProtoEncode::encode_varint_raw(pos PROTO_ENCODE_DEBUG_ARG, this->address_type);
}
ProtoEncode::write_raw_byte(pos PROTO_ENCODE_DEBUG_ARG, 34);
ProtoEncode::write_raw_byte(pos PROTO_ENCODE_DEBUG_ARG, static_cast<uint8_t>(this->data_len));
ProtoEncode::encode_raw(pos PROTO_ENCODE_DEBUG_ARG, this->data, this->data_len);
return pos;
}
uint32_t BluetoothLERawAdvertisement::calculate_size() const {
uint32_t size = 0;
size += ProtoSize::calc_uint64_force(1, this->address);
size += ProtoSize::calc_sint32_force(1, this->rssi);
size += this->address_type ? 2 : 0;
size += 2 + this->data_len;
return size;
}
uint8_t *BluetoothLERawAdvertisementsResponse::encode(ProtoWriteBuffer &buffer PROTO_ENCODE_DEBUG_PARAM) const {
uint8_t *__restrict__ pos = buffer.get_pos();
for (uint16_t i = 0; i < this->advertisements_len; i++) {
ProtoEncode::encode_sub_message(pos PROTO_ENCODE_DEBUG_ARG, buffer, 1, this->advertisements[i]);
{
auto &sub_msg = this->advertisements[i];
ProtoEncode::write_raw_byte(pos PROTO_ENCODE_DEBUG_ARG, 10);
uint8_t *len_pos = pos++;
uint8_t *body_start = pos;
ProtoEncode::write_raw_byte(pos PROTO_ENCODE_DEBUG_ARG, 8);
ProtoEncode::encode_varint_raw_64(pos PROTO_ENCODE_DEBUG_ARG, sub_msg.address);
ProtoEncode::write_raw_byte(pos PROTO_ENCODE_DEBUG_ARG, 16);
ProtoEncode::encode_varint_raw_short(pos PROTO_ENCODE_DEBUG_ARG, encode_zigzag32(sub_msg.rssi));
if (sub_msg.address_type) {
ProtoEncode::write_raw_byte(pos PROTO_ENCODE_DEBUG_ARG, 24);
ProtoEncode::encode_varint_raw(pos PROTO_ENCODE_DEBUG_ARG, sub_msg.address_type);
}
ProtoEncode::write_raw_byte(pos PROTO_ENCODE_DEBUG_ARG, 34);
ProtoEncode::write_raw_byte(pos PROTO_ENCODE_DEBUG_ARG, static_cast<uint8_t>(sub_msg.data_len));
ProtoEncode::encode_raw(pos PROTO_ENCODE_DEBUG_ARG, sub_msg.data, sub_msg.data_len);
*len_pos = static_cast<uint8_t>(pos - body_start);
}
}
return pos;
}
uint32_t BluetoothLERawAdvertisementsResponse::calculate_size() const {
uint32_t size = 0;
for (uint16_t i = 0; i < this->advertisements_len; i++) {
size += ProtoSize::calc_message_force(1, this->advertisements[i].calculate_size());
{
auto &sub_msg = this->advertisements[i];
uint32_t sub_size = 0;
sub_size += ProtoSize::calc_uint64_force(1, sub_msg.address);
sub_size += ProtoSize::calc_sint32_force(1, sub_msg.rssi);
sub_size += sub_msg.address_type ? 2 : 0;
sub_size += 2 + sub_msg.data_len;
size += 2 + sub_size;
}
}
return size;
}