158 lines
4.6 KiB
C
158 lines
4.6 KiB
C
#include "audio_player_mp3.h"
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#include <stdio.h>
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#include "main.h"
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#include "ff.h"
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#include "FreeRTOS.h"
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#include "queue.h"
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#include "elog.h"
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#include "heap.h"
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#include "bsp_aic3204.h"
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#define MINIMP3_IMPLEMENTATION
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#include "minimp3.h"
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const static char *TAG = "player_mp3";
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/**
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* @brief 播放MP3文件
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*
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* @param file_name 文件路径
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* @return esp_err_t 错误代码
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*
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* @note 本函数需要至少25600字节任务栈空间
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*/
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void music_mp3_play(const char *file_name)
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{
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FIL *file = malloc(sizeof(FIL));
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uint8_t *file_buffer = malloc(FILE_BUFFER_SIZE);
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FRESULT f_result = f_open(file, file_name, FA_READ);
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if (f_result == FR_OK) {
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elog_info(TAG, "open %s successful", file_name);
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} else {
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elog_error(TAG, "open %s failed, error code: %d", file_name, f_result);
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return;
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}
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/* 创建并初始化解码器 */
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mp3dec_t mp3d; //6668 bytes
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mp3dec_init(&mp3d);
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/* 初始化SAI */
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audio_hal_start(MINIMP3_MAX_SAMPLES_PER_FRAME, sizeof(mp3d_sample_t));
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int32_t file_buffer_available = 0; //剩余的缓冲区大小
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while(1) {
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/* 从文件中补充数据到缓冲区 */
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if(file_buffer_available < FILE_BUFFER_SIZE/2) { //文件缓冲区剩余不足一半
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int32_t file_buffer_consumed = (FILE_BUFFER_SIZE - file_buffer_available);
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UINT br;
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f_result = f_read(file, file_buffer+file_buffer_available, file_buffer_consumed, &br); //从文件中读取新的内容
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if (f_result != FR_OK) {
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elog_error(TAG, "file read error");
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break;
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}
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file_buffer_available += br;
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// uint32_t bytes_read = file_buffer_consumed + file_buffer_available - FILE_BUFFER_SIZE;
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// if (bytes_read > 0) {
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// elog_verbose(TAG, "reading %d bytes from file", (int)bytes_read);
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// }
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HAL_GPIO_TogglePin(LED_Y_GPIO_Port, LED_Y_Pin);
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if(file_buffer_available <= 0) { //文件已经读取完毕
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elog_info(TAG, "play done");
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break; //结束播放
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}
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}
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/* 解码新一帧MP3数据 */
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mp3dec_frame_info_t info;
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mp3d_sample_t *sample = malloc(MINIMP3_MAX_SAMPLES_PER_FRAME * sizeof(mp3d_sample_t));
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uint32_t sample_count = mp3dec_decode_frame(&mp3d, file_buffer, file_buffer_available, sample, &info);
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/* 将解码后的PCM数据写入SAI */
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if (sample_count != 0) {
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audio_hal_write(sample, sample_count * 2 * sizeof(mp3d_sample_t)); //sample_count只包含一个声道的采样数
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} else {
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free(sample);
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}
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/* 从缓冲区中删除解码完毕的帧 */
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file_buffer_available -= info.frame_bytes; //从剩余缓冲区大小中减去被消耗的缓冲区大小
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memmove(file_buffer, file_buffer+info.frame_bytes, file_buffer_available); //删除已消耗的缓冲区内容
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if (HAL_GPIO_ReadPin(KEY2_GPIO_Port, KEY2_Pin) == GPIO_PIN_RESET) {
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vTaskDelay(pdMS_TO_TICKS(100));
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while (HAL_GPIO_ReadPin(KEY2_GPIO_Port, KEY2_Pin) == GPIO_PIN_RESET) {
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vTaskDelay(pdMS_TO_TICKS(1));
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}
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break;
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}
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if (HAL_GPIO_ReadPin(KEY1_GPIO_Port, KEY1_Pin) == GPIO_PIN_RESET) {
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vTaskDelay(pdMS_TO_TICKS(100));
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static uint8_t samplerate = 0;
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switch (samplerate) {
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case 0:
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bsp_aic3204_set_fs(&hi2c1, 8000);
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break;
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case 1:
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bsp_aic3204_set_fs(&hi2c1, 11025);
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break;
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case 2:
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bsp_aic3204_set_fs(&hi2c1, 12000);
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break;
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case 3:
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bsp_aic3204_set_fs(&hi2c1, 16000);
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break;
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case 4:
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bsp_aic3204_set_fs(&hi2c1, 22050);
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break;
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case 5:
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bsp_aic3204_set_fs(&hi2c1, 24000);
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break;
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case 6:
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bsp_aic3204_set_fs(&hi2c1, 32000);
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break;
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case 7:
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bsp_aic3204_set_fs(&hi2c1, 44100);
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break;
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case 8:
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bsp_aic3204_set_fs(&hi2c1, 48000);
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break;
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case 9:
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bsp_aic3204_set_fs(&hi2c1, 88200);
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break;
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case 10:
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bsp_aic3204_set_fs(&hi2c1, 96000);
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break;
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case 11:
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bsp_aic3204_set_fs(&hi2c1, 176400);
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break;
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case 12:
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bsp_aic3204_set_fs(&hi2c1, 192000);
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break;
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}
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samplerate ++;
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if (samplerate >= 13) {
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samplerate = 0;
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}
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while (HAL_GPIO_ReadPin(KEY1_GPIO_Port, KEY1_Pin) == GPIO_PIN_RESET) {
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vTaskDelay(pdMS_TO_TICKS(1));
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}
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}
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}
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/* 关闭文件 */
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audio_hal_stop();
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f_close(file);
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free(file_buffer);
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free(file);
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tlsf_pool_statistics *dtcm_heap_statistics = get_dtcm_heap_statistics();
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tlsf_pool_statistics *ahb_heap_statistics = get_ahb_heap_statistics();
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elog_verbose(TAG, "free heap: DTCM: %d, AXI: %d", dtcm_heap_statistics->free_size, ahb_heap_statistics->free_size);
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}
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