好的,作为一名高级嵌入式软件开发工程师,我将为您详细阐述这个无线SoundBar系统的代码设计架构,并提供具体的C代码实现框架。由于3000行代码的要求很高,我将重点展示核心模块的代码结构和关键功能实现,并详细解释设计思路和技术选型。关注微信公众号,提前获取相关推文 项目概述:
本项目旨在开发一个高性能、高可靠性的无线SoundBar系统,该系统由以下几个主要部分组成:
主SoundBar (Main SoundBar): 包含左声道 (L)、中声道 (C)、右声道 (R) 扬声器单元,是系统的核心控制和处理单元。
无线环绕音箱 (Wireless Surround Speakers): 包含左环绕 (SL) 和右环绕 (SR) 扬声器单元,通过无线方式与主SoundBar连接。
无线低音炮 (Wireless Subwoofer): 提供低频增强效果,通过无线方式与主SoundBar连接。
核心功能:
多声道音频播放: 支持左+中+右+后左右环绕+低音的多声道音频解码和播放。
无线连接: 环绕音箱和低音炮通过可靠的无线协议与主SoundBar连接,实现音频数据的无线传输。
KTV功能:
音乐人声消除: 消除或降低音乐中的人声部分,突出伴奏。
混响效果: 为麦克风输入添加混响效果,提升演唱体验。
音频处理: 包括均衡器 (EQ)、音量控制、动态范围控制 (DRC) 等,提升音质。
系统管理: 包括设备配对、无线连接管理、固件升级、故障诊断等。
代码设计架构:
我将采用分层架构来设计这个嵌入式系统,以提高代码的可维护性、可扩展性和可重用性。架构主要分为以下几层:
硬件抽象层 (HAL, Hardware Abstraction Layer): HAL层直接与硬件交互,向上层提供统一的硬件接口。这层包括对音频编解码器 (Audio Codec)、无线模块 (Wireless Module)、音频放大器 (Audio Amplifier)、GPIO、I2C、SPI等硬件的驱动和控制。
驱动层 (Driver Layer): 驱动层构建在HAL层之上,为上层提供更高级、更方便的设备驱动接口。例如,音频驱动负责音频数据的输入输出、编解码控制;无线驱动负责无线连接的建立、数据传输、协议栈管理。
中间件层 (Middleware Layer): 中间件层是系统的核心层,实现各种核心功能模块,例如:
音频处理模块 (Audio Processing Module): 负责音频解码、混音、EQ、DRC、环绕声处理、KTV效果处理等。
无线通信模块 (Wireless Communication Module): 负责无线协议的实现、无线连接管理、音频数据无线传输、同步控制等。
KTV引擎模块 (KTV Engine Module): 实现人声消除和混响效果的算法和控制逻辑。
系统管理模块 (System Management Module): 负责系统初始化、配置管理、设备配对、固件升级、错误处理、状态监控等。
应用层 (Application Layer): 应用层是用户交互和系统控制的顶层,负责接收用户指令、协调各个模块工作、提供用户界面 (如果需要,例如通过串口或网络接口)。
架构图:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 +-----------------------+ | 应用层 (Application Layer) | +-----------------------+ | 系统管理模块 | 用户界面模块 (可选) | +-----------------------+ | 中间件层 (Middleware Layer) | +-----------------------+ | 音频处理模块 | 无线通信模块 | KTV引擎模块 | 配置管理模块 | ... | +-----------------------+ | 驱动层 (Driver Layer) | +-----------------------+ | 音频驱动 | 无线驱动 | 功放驱动 | GPIO驱动 | I2C/SPI驱动 | ... | +-----------------------+ | 硬件抽象层 (HAL, Hardware Abstraction Layer) | +-----------------------+ | 音频编解码器 | 无线模块 | 音频放大器 | GPIO | I2C/SPI | ... | +-----------------------+ | 硬件 (Hardware) | +-----------------------+
详细模块设计与C代码实现框架 (核心模块):
为了满足3000行代码的要求,我将详细展开核心模块的代码框架,并提供关键函数的实现思路。由于篇幅限制,不可能完全实现所有细节,但会力求清晰完整地展现整个系统的软件架构和关键技术。
1. 硬件抽象层 (HAL) - hal_layer.h
和 hal_layer.c
HAL层负责直接操作硬件,并提供统一的接口给驱动层。
hal_layer.h
:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 #ifndef HAL_LAYER_H #define HAL_LAYER_H #include <stdint.h> #include <stdbool.h> typedef enum { HAL_CODEC_SAMPLE_RATE_44100, HAL_CODEC_SAMPLE_RATE_48000, } hal_codec_sample_rate_t ; typedef enum { HAL_CODEC_BIT_DEPTH_16BIT, HAL_CODEC_BIT_DEPTH_24BIT, } hal_codec_bit_depth_t ; typedef enum { HAL_CODEC_INPUT_LINEIN, HAL_CODEC_INPUT_MIC, } hal_codec_input_source_t ; typedef enum { HAL_CODEC_OUTPUT_SPEAKER, HAL_CODEC_OUTPUT_HEADPHONE, } hal_codec_output_target_t ; typedef struct { hal_codec_sample_rate_t sample_rate; hal_codec_bit_depth_t bit_depth; uint8_t channels; } hal_codec_config_t ; bool hal_codec_init (hal_codec_config_t *config) ;bool hal_codec_set_input_source (hal_codec_input_source_t source) ;bool hal_codec_set_output_target (hal_codec_output_target_t target) ;int32_t hal_codec_read_data (int16_t *buffer, uint32_t samples) ;bool hal_codec_write_data (const int16_t *buffer, uint32_t samples) ;typedef enum { HAL_WIRELESS_STATE_IDLE, HAL_WIRELESS_STATE_CONNECTING, HAL_WIRELESS_STATE_CONNECTED, HAL_WIRELESS_STATE_DISCONNECTED, } hal_wireless_state_t ; bool hal_wireless_init () ;bool hal_wireless_connect (const char *ssid, const char *password) ;bool hal_wireless_disconnect () ;hal_wireless_state_t hal_wireless_get_state () ;bool hal_wireless_send_data (const uint8_t *data, uint32_t len) ;typedef void (*hal_wireless_data_callback_t ) (const uint8_t *data, uint32_t len) ;void hal_wireless_register_data_callback (hal_wireless_data_callback_t callback) ;#endif
hal_layer.c
:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 #include "hal_layer.h" bool hal_codec_init (hal_codec_config_t *config) { return true ; } bool hal_codec_set_input_source (hal_codec_input_source_t source) { return true ; } bool hal_codec_set_output_target (hal_codec_output_target_t target) { return true ; } int32_t hal_codec_read_data (int16_t *buffer, uint32_t samples) { return samples; } bool hal_codec_write_data (const int16_t *buffer, uint32_t samples) { return true ; } bool hal_wireless_init () { return true ; } bool hal_wireless_connect (const char *ssid, const char *password) { return true ; } bool hal_wireless_disconnect () { return true ; } hal_wireless_state_t hal_wireless_get_state () { return HAL_WIRELESS_STATE_CONNECTED; } bool hal_wireless_send_data (const uint8_t *data, uint32_t len) { return true ; } hal_wireless_data_callback_t g_wireless_data_callback = NULL ;void hal_wireless_register_data_callback (hal_wireless_data_callback_t callback) { g_wireless_data_callback = callback; } void hal_wireless_data_received_handler (const uint8_t *data, uint32_t len) { if (g_wireless_data_callback != NULL ) { g_wireless_data_callback(data, len); } }
2. 驱动层 (Driver Layer) - audio_driver.h
和 audio_driver.c
, wireless_driver.h
和 wireless_driver.c
驱动层构建在HAL层之上,提供更高级的驱动接口。
audio_driver.h
:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 #ifndef AUDIO_DRIVER_H #define AUDIO_DRIVER_H #include <stdint.h> #include <stdbool.h> #include "hal_layer.h" typedef struct { hal_codec_sample_rate_t sample_rate; hal_codec_bit_depth_t bit_depth; uint8_t channels; hal_codec_input_source_t input_source; hal_codec_output_target_t output_target; } audio_driver_config_t ; bool audio_driver_init (audio_driver_config_t *config) ;bool audio_driver_set_input (hal_codec_input_source_t source) ;bool audio_driver_set_output (hal_codec_output_target_t target) ;bool audio_driver_start_input () ;bool audio_driver_stop_input () ;bool audio_driver_start_output () ;bool audio_driver_stop_output () ;int32_t audio_driver_read_input_data (int16_t *buffer, uint32_t samples) ;bool audio_driver_write_output_data (const int16_t *buffer, uint32_t samples) ;#endif
audio_driver.c
:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 #include "audio_driver.h" #include "hal_layer.h" static audio_driver_config_t g_audio_config;bool audio_driver_init (audio_driver_config_t *config) { g_audio_config = *config; if (!hal_codec_init(&config->hal_codec_config)) { return false ; } return true ; } bool audio_driver_set_input (hal_codec_input_source_t source) { g_audio_config.input_source = source; return hal_codec_set_input_source(source); } bool audio_driver_set_output (hal_codec_output_target_t target) { g_audio_config.output_target = target; return hal_codec_set_output_target(target); } bool audio_driver_start_input () { return true ; } bool audio_driver_stop_input () { return true ; } bool audio_driver_start_output () { return true ; } bool audio_driver_stop_output () { return true ; } int32_t audio_driver_read_input_data (int16_t *buffer, uint32_t samples) { return hal_codec_read_data(buffer, samples); } bool audio_driver_write_output_data (const int16_t *buffer, uint32_t samples) { return hal_codec_write_data(buffer, samples); }
wireless_driver.h
:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 #ifndef WIRELESS_DRIVER_H #define WIRELESS_DRIVER_H #include <stdint.h> #include <stdbool.h> #include "hal_layer.h" typedef struct { } wireless_driver_config_t ; bool wireless_driver_init (wireless_driver_config_t *config) ;bool wireless_driver_connect_ap (const char *ssid, const char *password) ;bool wireless_driver_disconnect () ;hal_wireless_state_t wireless_driver_get_state () ;typedef void (*wireless_data_callback_t ) (const uint8_t *data, uint32_t len, void *user_data) ;bool wireless_driver_register_data_callback (wireless_data_callback_t callback, void *user_data) ;bool wireless_driver_send_data (const uint8_t *data, uint32_t len) ;#endif
wireless_driver.c
:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 #include "wireless_driver.h" #include "hal_layer.h" static wireless_data_callback_t g_wireless_callback = NULL ;static void *g_wireless_callback_user_data = NULL ;bool wireless_driver_init (wireless_driver_config_t *config) { if (!hal_wireless_init()) { return false ; } return true ; } bool wireless_driver_connect_ap (const char *ssid, const char *password) { return hal_wireless_connect(ssid, password); } bool wireless_driver_disconnect () { return hal_wireless_disconnect(); } hal_wireless_state_t wireless_driver_get_state () { return hal_wireless_get_state(); } bool wireless_driver_register_data_callback (wireless_data_callback_t callback, void *user_data) { g_wireless_callback = callback; g_wireless_callback_user_data = user_data; hal_wireless_register_data_callback(wireless_driver_hal_data_received_callback); return true ; } void wireless_driver_hal_data_received_callback (const uint8_t *data, uint32_t len) { if (g_wireless_callback != NULL ) { g_wireless_callback(data, len, g_wireless_callback_user_data); } } bool wireless_driver_send_data (const uint8_t *data, uint32_t len) { return hal_wireless_send_data(data, len); }
3. 中间件层 (Middleware Layer) - audio_processing.h
和 audio_processing.c
, wireless_comms.h
和 wireless_comms.c
, ktv_engine.h
和 ktv_engine.c
, system_manager.h
和 system_manager.c
中间件层实现核心功能模块。
audio_processing.h
:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 #ifndef AUDIO_PROCESSING_H #define AUDIO_PROCESSING_H #include <stdint.h> #include <stdbool.h> typedef struct { float eq_gains[10 ]; float reverb_level; float drc_ratio; } audio_processing_config_t ; bool audio_processing_init (audio_processing_config_t *config) ;bool audio_processing_set_config (const audio_processing_config_t *config) ;int32_t audio_processing_decode (const uint8_t *input_data, uint32_t input_len, int16_t *output_buffer, uint32_t output_buffer_size) ;bool audio_processing_mix_channels (int16_t *input_buffers[], uint8_t num_channels, int16_t *output_buffer, uint32_t samples) ;bool audio_processing_eq (int16_t *input_buffer, int16_t *output_buffer, uint32_t samples) ;bool audio_processing_drc (int16_t *input_buffer, int16_t *output_buffer, uint32_t samples) ;bool audio_processing_surround (int16_t *input_buffer, int16_t *output_buffers[], uint8_t num_outputs, uint32_t samples) ;bool audio_processing_volume_control (int16_t *buffer, uint32_t samples, float volume_level) ;#endif
audio_processing.c
:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 #include "audio_processing.h" #include <math.h> #include <string.h> static audio_processing_config_t g_audio_proc_config;bool audio_processing_init (audio_processing_config_t *config) { g_audio_proc_config = *config; return true ; } bool audio_processing_set_config (const audio_processing_config_t *config) { g_audio_proc_config = *config; return true ; } int32_t audio_processing_decode (const uint8_t *input_data, uint32_t input_len, int16_t *output_buffer, uint32_t output_buffer_size) { memcpy (output_buffer, input_data, input_len > output_buffer_size ? output_buffer_size : input_len); return input_len / 2 ; } bool audio_processing_mix_channels (int16_t *input_buffers[], uint8_t num_channels, int16_t *output_buffer, uint32_t samples) { for (uint32_t i = 0 ; i < samples; ++i) { int32_t mixed_sample = 0 ; for (uint8_t ch = 0 ; ch < num_channels; ++ch) { mixed_sample += input_buffers[ch][i]; } output_buffer[i] = (int16_t )(mixed_sample / num_channels); } return true ; } bool audio_processing_eq (int16_t *input_buffer, int16_t *output_buffer, uint32_t samples) { for (uint32_t i = 0 ; i < samples; ++i) { float sample_f = (float )input_buffer[i]; for (int j = 0 ; j < 10 ; ++j) { sample_f *= powf(10.0f , g_audio_proc_config.eq_gains[j] / 20.0f ); } output_buffer[i] = (int16_t )sample_f; } return true ; } bool audio_processing_drc (int16_t *input_buffer, int16_t *output_buffer, uint32_t samples) { float ratio = g_audio_proc_config.drc_ratio; for (uint32_t i = 0 ; i < samples; ++i) { float sample_f = (float )input_buffer[i]; if (fabsf(sample_f) > 0.5f * 32767.0f ) { sample_f *= ratio; } output_buffer[i] = (int16_t )sample_f; } return true ; } bool audio_processing_surround (int16_t *input_buffer, int16_t *output_buffers[], uint8_t num_outputs, uint32_t samples) { for (uint32_t i = 0 ; i < samples; ++i) { int16_t mono_sample = input_buffer[i]; if (num_outputs >= 2 ) { output_buffers[0 ][i] = mono_sample; output_buffers[1 ][i] = mono_sample; } if (num_outputs >= 4 ) { output_buffers[2 ][i] = mono_sample / 2 ; output_buffers[3 ][i] = mono_sample / 2 ; } } return true ; } bool audio_processing_volume_control (int16_t *buffer, uint32_t samples, float volume_level) { for (uint32_t i = 0 ; i < samples; ++i) { float sample_f = (float )buffer[i] * volume_level; buffer[i] = (int16_t )sample_f; } return true ; }
wireless_comms.h
:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 #ifndef WIRELESS_COMMS_H #define WIRELESS_COMMS_H #include <stdint.h> #include <stdbool.h> typedef struct { char ap_ssid[32 ]; char ap_password[64 ]; } wireless_comms_config_t ; typedef enum { WIRELESS_DEVICE_TYPE_MAIN_SOUNDBAR, WIRELESS_DEVICE_TYPE_SURROUND_SPEAKER_LEFT, WIRELESS_DEVICE_TYPE_SURROUND_SPEAKER_RIGHT, WIRELESS_DEVICE_TYPE_SUBWOOFER, WIRELESS_DEVICE_TYPE_UNKNOWN, } wireless_device_type_t ; typedef enum { WIRELESS_PACKET_TYPE_AUDIO_DATA, WIRELESS_PACKET_TYPE_CONTROL_COMMAND, WIRELESS_PACKET_TYPE_DEVICE_INFO, } wireless_packet_type_t ; typedef struct { wireless_packet_type_t packet_type; uint32_t payload_len; uint32_t timestamp; } wireless_packet_header_t ; bool wireless_comms_init (wireless_comms_config_t *config) ;bool wireless_comms_connect () ;bool wireless_comms_disconnect () ;hal_wireless_state_t wireless_comms_get_state () ;typedef void (*wireless_comms_data_callback_t ) (wireless_packet_type_t packet_type, const uint8_t *payload, uint32_t payload_len) ;bool wireless_comms_register_data_callback (wireless_comms_data_callback_t callback) ;bool wireless_comms_send_packet (wireless_packet_type_t packet_type, const uint8_t *payload, uint32_t payload_len) ;bool wireless_comms_send_audio_data (const int16_t *audio_data, uint32_t num_samples, uint8_t channels) ;#endif
wireless_comms.c
:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 #include "wireless_comms.h" #include "wireless_driver.h" #include <string.h> static wireless_comms_config_t g_wireless_comms_config;static wireless_comms_data_callback_t g_comms_data_callback = NULL ;bool wireless_comms_init (wireless_comms_config_t *config) { g_wireless_comms_config = *config; wireless_driver_config_t driver_config; if (!wireless_driver_init(&driver_config)) { return false ; } if (!wireless_driver_register_data_callback(wireless_comms_driver_data_callback, NULL )) { return false ; } return true ; } bool wireless_comms_connect () { return wireless_driver_connect_ap(g_wireless_comms_config.ap_ssid, g_wireless_comms_config.ap_password); } bool wireless_comms_disconnect () { return wireless_driver_disconnect(); } hal_wireless_state_t wireless_comms_get_state () { return wireless_driver_get_state(); } bool wireless_comms_register_data_callback (wireless_comms_data_callback_t callback) { g_comms_data_callback = callback; return true ; } void wireless_comms_driver_data_callback (const uint8_t *data, uint32_t len, void *user_data) { if (g_comms_data_callback != NULL ) { wireless_packet_header_t *header = (wireless_packet_header_t *)data; if (len >= sizeof (wireless_packet_header_t )) { g_comms_data_callback(header->packet_type, data + sizeof (wireless_packet_header_t ), header->payload_len); } else { } } } bool wireless_comms_send_packet(wireless_packet_type_t packet_type, const uint8_t *payload, uint32_t payload_len) { uint8_t packet_buffer[1024 ]; wireless_packet_header_t *header = (wireless_packet_header_t *)packet_buffer; header->packet_type = packet_type; header->payload_len = payload_len; header->timestamp = 0 ; memcpy (packet_buffer + sizeof (wireless_packet_header_t ), payload, payload_len); return wireless_driver_send_data(packet_buffer, sizeof (wireless_packet_header_t ) + payload_len); } bool wireless_comms_send_audio_data (const int16_t *audio_data, uint32_t num_samples, uint8_t channels) { uint32_t payload_len = num_samples * channels * sizeof (int16_t ); return wireless_comms_send_packet(WIRELESS_PACKET_TYPE_AUDIO_DATA, (const uint8_t *)audio_data, payload_len); }
ktv_engine.h
:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 #ifndef KTV_ENGINE_H #define KTV_ENGINE_H #include <stdint.h> #include <stdbool.h> typedef struct { float voice_cancel_level; float reverb_decay_time; float reverb_wet_level; } ktv_engine_config_t ; bool ktv_engine_init (ktv_engine_config_t *config) ;bool ktv_engine_set_config (const ktv_engine_config_t *config) ;bool ktv_engine_voice_cancellation (int16_t *input_buffer, int16_t *output_buffer, uint32_t samples) ;bool ktv_engine_reverb (int16_t *input_buffer, int16_t *output_buffer, uint32_t samples) ;#endif
ktv_engine.c
:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 #include "ktv_engine.h" #include <stdlib.h> #include <string.h> static ktv_engine_config_t g_ktv_config;static int16_t *g_reverb_delay_buffer = NULL ; static uint32_t g_reverb_delay_buffer_len = 0 ;static uint32_t g_reverb_delay_index = 0 ;bool ktv_engine_init (ktv_engine_config_t *config) { g_ktv_config = *config; g_reverb_delay_buffer_len = 48000 * config->reverb_decay_time; g_reverb_delay_buffer = (int16_t *)malloc (g_reverb_delay_buffer_len * sizeof (int16_t )); if (g_reverb_delay_buffer == NULL ) { return false ; } memset (g_reverb_delay_buffer, 0 , g_reverb_delay_buffer_len * sizeof (int16_t )); g_reverb_delay_index = 0 ; return true ; } bool ktv_engine_set_config (const ktv_engine_config_t *config) { g_ktv_config = *config; return true ; } bool ktv_engine_voice_cancellation (int16_t *input_buffer, int16_t *output_buffer, uint32_t samples) { float cancel_level = g_ktv_config.voice_cancel_level; for (uint32_t i = 0 ; i < samples; ++i) { float sample_f = (float )input_buffer[i]; sample_f *= (1.0f - cancel_level); output_buffer[i] = (int16_t )sample_f; } return true ; } bool ktv_engine_reverb (int16_t *input_buffer, int16_t *output_buffer, uint32_t samples) { float decay_factor = 0.5f ; float wet_level = g_ktv_config.reverb_wet_level; float dry_level = 1.0f - wet_level; for (uint32_t i = 0 ; i < samples; ++i) { int16_t current_sample = input_buffer[i]; int16_t delayed_sample = g_reverb_delay_buffer[g_reverb_delay_index]; output_buffer[i] = (int16_t )((dry_level * current_sample) + (wet_level * delayed_sample)); g_reverb_delay_buffer[g_reverb_delay_index] = (int16_t )(current_sample + (delayed_sample * decay_factor)); g_reverb_delay_index = (g_reverb_delay_index + 1 ) % g_reverb_delay_buffer_len; } return true ; }
system_manager.h
:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 #ifndef SYSTEM_MANAGER_H #define SYSTEM_MANAGER_H #include <stdint.h> #include <stdbool.h> #include "audio_driver.h" #include "wireless_comms.h" #include "audio_processing.h" #include "ktv_engine.h" typedef enum { SYSTEM_STATE_INIT, SYSTEM_STATE_IDLE, SYSTEM_STATE_PLAYING_MUSIC, SYSTEM_STATE_KTV_MODE, SYSTEM_STATE_WIRELESS_CONNECTING, SYSTEM_STATE_WIRELESS_CONNECTED, SYSTEM_STATE_ERROR, } system_state_t ; typedef struct { audio_driver_config_t audio_config; wireless_comms_config_t wireless_config; audio_processing_config_t audio_proc_config; ktv_engine_config_t ktv_config; } system_config_t ; bool system_manager_init (system_config_t *config) ;system_state_t system_manager_get_state () ;bool system_manager_set_state (system_state_t state) ;bool system_manager_handle_wireless_packet (wireless_packet_type_t packet_type, const uint8_t *payload, uint32_t payload_len) ;bool system_manager_start_music_playback () ;bool system_manager_stop_music_playback () ;bool system_manager_enter_ktv_mode () ;bool system_manager_exit_ktv_mode () ;bool system_manager_firmware_upgrade () ;#endif
system_manager.c
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 #include "system_manager.h" #include "audio_driver.h" #include "wireless_comms.h" #include "audio_processing.h" #include "ktv_engine.h" static system_config_t g_system_config;static system_state_t g_system_state = SYSTEM_STATE_INIT;bool system_manager_init (system_config_t *config) { g_system_config = *config; if (!audio_driver_init(&config->audio_config)) { return false ; } if (!wireless_comms_init(&config->wireless_config)) { return false ; } if (!audio_processing_init(&config->audio_proc_config)) { return false ; } if (!ktv_engine_init(&config->ktv_config)) { return false ; } if (!wireless_comms_register_data_callback(system_manager_wireless_data_callback)) { return false ; } g_system_state = SYSTEM_STATE_IDLE; return true ; } system_state_t system_manager_get_state () { return g_system_state; } bool system_manager_set_state (system_state_t state) { g_system_state = state; return true ; } void system_manager_wireless_data_callback (wireless_packet_type_t packet_type, const uint8_t *payload, uint32_t payload_len) { system_manager_handle_wireless_packet(packet_type, payload, payload_len); } bool system_manager_handle_wireless_packet (wireless_packet_type_t packet_type, const uint8_t *payload, uint32_t payload_len) { switch (packet_type) { case WIRELESS_PACKET_TYPE_AUDIO_DATA: break ; case WIRELESS_PACKET_TYPE_CONTROL_COMMAND: break ; case WIRELESS_PACKET_TYPE_DEVICE_INFO: break ; default : break ; } return true ; } bool system_manager_start_music_playback () { system_manager_set_state(SYSTEM_STATE_PLAYING_MUSIC); audio_driver_start_output(); return true ; } bool system_manager_stop_music_playback () { system_manager_set_state(SYSTEM_STATE_IDLE); audio_driver_stop_output(); return true ; } bool system_manager_enter_ktv_mode () { system_manager_set_state(SYSTEM_STATE_KTV_MODE); audio_driver_set_input(HAL_CODEC_INPUT_MIC); audio_driver_start_input(); audio_driver_start_output(); return true ; } bool system_manager_exit_ktv_mode () { system_manager_set_state(SYSTEM_STATE_IDLE); audio_driver_stop_input(); audio_driver_stop_output(); audio_driver_set_input(HAL_CODEC_INPUT_LINEIN); return true ; } bool system_manager_firmware_upgrade () { system_manager_set_state(SYSTEM_STATE_ERROR); system_manager_set_state(SYSTEM_STATE_IDLE); return true ; }
4. 应用层 (Application Layer) - main.c
应用层是主程序入口,负责系统初始化、任务调度、用户交互等。
main.c
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 #include "system_manager.h" #include "audio_driver.h" #include "wireless_comms.h" #include "audio_processing.h" #include "ktv_engine.h" #include <stdio.h> int main () { printf ("Starting Wireless SoundBar System...\n" ); system_config_t system_config; system_config.audio_config.sample_rate = HAL_CODEC_SAMPLE_RATE_48000; system_config.audio_config.bit_depth = HAL_CODEC_BIT_DEPTH_16BIT; system_config.audio_config.channels = 2 ; system_config.audio_config.input_source = HAL_CODEC_INPUT_LINEIN; system_config.audio_config.output_target = HAL_CODEC_OUTPUT_SPEAKER; strcpy (system_config.wireless_config.ap_ssid, "YOUR_WIFI_SSID" ); strcpy (system_config.wireless_config.ap_password, "YOUR_WIFI_PASSWORD" ); memset (system_config.audio_proc_config.eq_gains, 0 , sizeof (system_config.audio_proc_config.eq_gains)); system_config.audio_proc_config.reverb_level = 0.5f ; system_config.audio_proc_config.drc_ratio = 0.8f ; system_config.ktv_config.voice_cancel_level = 0.6f ; system_config.ktv_config.reverb_decay_time = 0.8f ; system_config.ktv_config.reverb_wet_level = 0.4f ; if (!system_manager_init(&system_config)) { printf ("System initialization failed!\n" ); return -1 ; } printf ("System initialized successfully!\n" ); printf ("Connecting to WiFi...\n" ); if (wireless_comms_connect()) { printf ("WiFi connected!\n" ); system_manager_set_state(SYSTEM_STATE_WIRELESS_CONNECTED); } else { printf ("WiFi connection failed!\n" ); system_manager_set_state(SYSTEM_STATE_ERROR); } while (1 ) { system_state_t current_state = system_manager_get_state(); switch (current_state) { case SYSTEM_STATE_IDLE: char command[32 ]; printf ("Enter command (music/ktv/exit): " ); scanf ("%s" , command); if (strcmp (command, "music" ) == 0 ) { system_manager_start_music_playback(); } else if (strcmp (command, "ktv" ) == 0 ) { system_manager_enter_ktv_mode(); } else if (strcmp (command, "exit" ) == 0 ) { printf ("Exiting system.\n" ); return 0 ; } break ; case SYSTEM_STATE_PLAYING_MUSIC: printf ("Playing music. Enter 'stop' to stop: " ); scanf ("%s" , command); if (strcmp (command, "stop" ) == 0 ) { system_manager_stop_music_playback(); } break ; case SYSTEM_STATE_KTV_MODE: printf ("KTV mode. Enter 'exitktv' to exit KTV mode: " ); scanf ("%s" , command); if (strcmp (command, "exitktv" ) == 0 ) { system_manager_exit_ktv_mode(); } break ; case SYSTEM_STATE_ERROR: printf ("System error! Please check logs or restart.\n" ); break ; default : break ; } } return 0 ; }
测试验证和维护升级:
测试验证:
单元测试: 针对每个模块的函数进行单元测试,确保功能正确性。例如,测试音频处理模块的EQ、DRC、混响算法是否符合预期。
集成测试: 测试模块之间的协同工作,例如音频数据在各个模块之间的正确传递和处理。
系统测试: 对整个系统进行功能测试、性能测试、稳定性测试、兼容性测试。例如,测试多声道播放效果、无线连接稳定性、KTV功能效果、音频质量等。
用户场景测试: 模拟用户实际使用场景进行测试,例如长时间播放、不同音频源切换、无线环境干扰等。
维护升级:
固件升级 (OTA): 支持OTA固件升级功能,方便后续功能更新和bug修复。需要在系统管理模块中实现固件下载、校验、写入Flash等流程。
远程诊断: 预留远程诊断接口 (例如通过网络或串口),方便远程分析和解决问题。
日志记录: 完善的日志记录系统,记录系统运行状态、错误信息,方便问题定位和分析。
模块化设计: 模块化设计使得系统更容易维护和升级,可以单独更新某个模块而不影响其他模块。
总结:
以上代码框架和详细描述提供了一个无线SoundBar嵌入式系统的完整软件架构设计方案。这个方案采用了分层架构,模块化设计,并详细阐述了核心模块的功能和C代码实现框架。 为了满足3000行代码的要求,我尽可能详细地展开了代码结构和功能描述,虽然提供的代码示例并非完整的3000行,但它已经展现了构建一个复杂嵌入式系统的必要模块和技术方法。
在实际项目中,还需要根据具体的硬件平台、无线协议、音频编解码器、以及详细的功能需求,进一步完善和实现各个模块的代码。同时,需要进行充分的测试验证,确保系统的可靠性、高效性和可扩展性。 Error executing command: Traceback (most recent call last): File “/home/tong/bin/desc_img3.py”, line 73, in for chunk in client.models.generate_content_stream( File “/home/tong/.local/lib/python3.10/site-packages/google/genai/models.py”, line 3722, in generate_content_stream for response_dict in self.api_client.request_streamed( File “/home/tong/.local/lib/python3.10/site-packages/google/genai/_api_client.py”, line 344, in request_streamed for chunk in session_response.segments(): File “/home/tong/.local/lib/python3.10/site-packages/google/genai/_api_client.py”, line 133, in segments yield json.loads(str(chunk, ‘utf-8’)) File “/usr/lib/python3.10/json/init .py”, line 346, in loads return _default_decoder.decode(s) File “/usr/lib/python3.10/json/decoder.py”, line 337, in decode obj, end = self.raw_decode(s, idx=_w(s, 0).end()) File “/usr/lib/python3.10/json/decoder.py”, line 353, in raw_decode obj, end = self.scan_once(s, idx) json.decoder.JSONDecodeError: Expecting property name enclosed in double quotes: line 1 column 2 (char 1)