Lukas Höppner
74 lines
2.8 KiB
C
74 lines
2.8 KiB
C
#ifndef NOVA64_IO_INTERFACE_H
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#define NOVA64_IO_INTERFACE_H
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#include <stdbool.h>
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#include <stdint.h>
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/* ========================================================================== */
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/* I/O Callback Typedefs */
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/* ========================================================================== */
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/**
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* @brief Callback to output audio samples.
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* @param samples Pointer to PCM audio sample buffer.
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* @param count Number of samples in the buffer.
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*/
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typedef void (*nova64_audio_output_cb_t)(const int16_t *samples,
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uint32_t count);
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/**
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* @brief Callback to read data from the SD card.
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* @param slot_idx Zero-based cartridge slot index.
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* @param file_path Null-terminated path to the file to read.
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* @param destination_buffer Pointer to memory where file data should be copied.
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* @param destination_length Maximum number of bytes available in the
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* destination buffer.
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* @return Number of bytes read on success, negative value on read error.
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*/
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typedef int32_t (*nova64_sd_read_file_cb_t)(uint32_t slot_idx,
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const char *file_path,
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uint8_t *destination_buffer,
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uint32_t destination_length);
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/**
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* @brief Callback to retrieve the size of a file on the SD card.
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* @param slot_idx Zero-based cartridge slot index.
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* @param file_path Null-terminated path to the file.
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* @return File size in bytes on success, negative value on error.
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*/
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typedef int32_t (*nova64_sd_get_file_size_cb_t)(uint32_t slot_idx,
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const char *file_path);
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/**
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* @brief Callback triggered when a cartridge state change occurs (e.g.
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* inserted/removed).
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* @param slot_idx Zero-based cartridge slot index.
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* @param is_inserted True if a cartridge is detected, false if ejected.
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*/
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typedef void (*nova64_cartridge_status_cb_t)(uint32_t slot_idx,
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bool is_inserted);
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/**
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* @brief Callback for core log output.
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* @param message Null-terminated UTF-8 log string.
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*/
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typedef void (*nova64_log_cb_t)(const char *message);
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/* ========================================================================== */
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/* I/O Interface Configuration Struct */
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/* ========================================================================== */
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/**
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* @brief Struct containing all I/O hardware abstraction callbacks.
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* Pass NULL for any unneeded callback.
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*/
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typedef struct {
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nova64_audio_output_cb_t audio_output;
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nova64_sd_read_file_cb_t sd_read_file;
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nova64_sd_get_file_size_cb_t sd_get_file_size;
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nova64_cartridge_status_cb_t cartridge_status;
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nova64_log_cb_t log_message;
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} nova64_io_interface_t;
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#endif // NOVA64_IO_INTERFACE_H
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