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Code Issues Releases Wiki Activity

Optimize API flash usage by storing message size at compile time (#9447)

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This commit is contained in:
J. Nick Koston
2025-07-11 14:38:23 -10:00
committed by GitHub
parent 983db6215f
commit 143bf694c7
9 changed files with 358 additions and 471 deletions
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16
esphome/components/api/api_frame_helper.h
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@@ -30,13 +30,11 @@ struct ReadPacketBuffer {
// Packed packet info structure to minimize memory usage
struct PacketInfo {
uint16_t message_type; // 2 bytes
uint16_t offset; // 2 bytes (sufficient for packet size ~1460 bytes)
uint16_t payload_size; // 2 bytes (up to 65535 bytes)
uint16_t padding; // 2 byte (for alignment)
uint16_t offset; // Offset in buffer where message starts
uint16_t payload_size; // Size of the message payload
uint8_t message_type; // Message type (0-255)
PacketInfo(uint16_t type, uint16_t off, uint16_t size)
: message_type(type), offset(off), payload_size(size), padding(0) {}
PacketInfo(uint8_t type, uint16_t off, uint16_t size) : offset(off), payload_size(size), message_type(type) {}
};
enum class APIError : uint16_t {
@@ -98,7 +96,7 @@ class APIFrameHelper {
}
// Give this helper a name for logging
void set_log_info(std::string info) { info_ = std::move(info); }
virtual APIError write_protobuf_packet(uint16_t type, ProtoWriteBuffer buffer) = 0;
virtual APIError write_protobuf_packet(uint8_t type, ProtoWriteBuffer buffer) = 0;
// Write multiple protobuf packets in a single operation
// packets contains (message_type, offset, length) for each message in the buffer
// The buffer contains all messages with appropriate padding before each
@@ -197,7 +195,7 @@ class APINoiseFrameHelper : public APIFrameHelper {
APIError init() override;
APIError loop() override;
APIError read_packet(ReadPacketBuffer *buffer) override;
APIError write_protobuf_packet(uint16_t type, ProtoWriteBuffer buffer) override;
APIError write_protobuf_packet(uint8_t type, ProtoWriteBuffer buffer) override;
APIError write_protobuf_packets(ProtoWriteBuffer buffer, std::span<const PacketInfo> packets) override;
// Get the frame header padding required by this protocol
uint8_t frame_header_padding() override { return frame_header_padding_; }
@@ -251,7 +249,7 @@ class APIPlaintextFrameHelper : public APIFrameHelper {
APIError init() override;
APIError loop() override;
APIError read_packet(ReadPacketBuffer *buffer) override;
APIError write_protobuf_packet(uint16_t type, ProtoWriteBuffer buffer) override;
APIError write_protobuf_packet(uint8_t type, ProtoWriteBuffer buffer) override;
APIError write_protobuf_packets(ProtoWriteBuffer buffer, std::span<const PacketInfo> packets) override;
uint8_t frame_header_padding() override { return frame_header_padding_; }
// Get the frame footer size required by this protocol