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first add sdk
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246
component/common/example/audio_mp3/example_audio_mp3.c
Executable file
246
component/common/example/audio_mp3/example_audio_mp3.c
Executable file
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#include "mp3/mp3_codec.h"
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#include "example_audio_mp3.h"
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#include "FreeRTOS.h"
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#include "task.h"
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#include "diag.h"
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#include "i2s_api.h"
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#include "analogin_api.h"
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#include <stdlib.h>
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#include "platform_opts.h"
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#include "ff.h"
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#include <fatfs_ext/inc/ff_driver.h>
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#include <disk_if/inc/sdcard.h>
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#include "section_config.h"
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#if CONFIG_EXAMPLE_MP3_STREAM_SGTL5000
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#include "sgtl5000.h"
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#else
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#include "alc5651.h"
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#endif
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//-----------------Frequency Mapping Table--------------------//
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/*+-------------+-------------------------+--------------------+
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| Frequency(hz) | Number of Channels | Decoded Bytes |
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|(CH_MONO:1 CH_STEREO:2) |(I2S_DMA_PAGE_SIZE) |
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+---------------+-------------------------+--------------------+
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| 8000 | 1 | 1152 |
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| 8000 | 2 | 2304 |
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| 16000 | 1 | 1152 |
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| 16000 | 2 | 2304 |
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| 22050 | 1 | 1152 |
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| 22050 | 2 | 2304 |
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| 24000 | 1 | 1152 |
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| 24000 | 2 | 2304 |
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| 32000 | 1 | 2304 |
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| 32000 | 2 | 4608 |
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| 44100 | 1 | 2304 |
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| 44100 | 2 | 4608 |
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| 48000 | 1 | 2304 |
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| 48000 | 2 | 4608 |
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+---------------+-------------------------+------------------+*/
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//------------------------------------- ---CONFIG Parameters-----------------------------------------------//
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#define I2S_DMA_PAGE_SIZE 4608 //Use frequency mapping table and set this value to number of decoded bytes
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//Options:- 1152, 2304, 4608
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#define NUM_CHANNELS CH_STEREO //Use mp3 file properties to determine number of channels
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//Options:- CH_MONO, CH_STEREO
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#define SAMPLING_FREQ SR_32KHZ //Use mp3 file properties to identify frequency and use appropriate macro
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//Options:- SR_8KHZ =>8000hz - PASS
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// SR_16KHZ =>16000hz - PASS
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// SR_24KHZ =>24000hz - PASS
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// SR_32KHZ =>32000hz - PASS
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// SR_48KHZ =>48000hz - PASS
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// SR_96KHZ =>96000hz ~ NOT SUPPORTED
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// SR_7p35KHZ =>7350hz ~ NOT SUPPORTED
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// SR_14p7KHZ =>14700hz ~ NOT SUPPORTED
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// SR_22p05KHZ =>22050hz - PASS
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// SR_29p4KHZ =>29400hz ~ NOT SUPPORTED
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// SR_44p1KHZ =>44100hz - PASS
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// SR_88p2KHZ =>88200hz ~ NOT SUPPORTED
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#define FILE_NAME "AudioSDTest.mp3" //Specify the file name you wish to play that is present in the SDCARD
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//------------------------------------- ---CONFIG Parameters-----------------------------------------------//
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#define INPUT_FRAME_SIZE 1500
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unsigned char MP3_Buf[INPUT_FRAME_SIZE];
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signed short WAV_Buf[I2S_DMA_PAGE_SIZE];
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#define I2S_DMA_PAGE_NUM 2 // Vaild number is 2~4
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static u8 i2s_tx_buf[I2S_DMA_PAGE_SIZE*I2S_DMA_PAGE_NUM];
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static u8 i2s_rx_buf[I2S_DMA_PAGE_SIZE*I2S_DMA_PAGE_NUM];
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#define I2S_SCLK_PIN PC_1
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#define I2S_WS_PIN PC_0
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#define I2S_SD_PIN PC_2
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static i2s_t i2s_obj;
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static void i2s_tx_complete(void *data, char *pbuf)
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{
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//
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}
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static void i2s_rx_complete(void *data, char* pbuf)
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{
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//
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}
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void audio_play_sd_mp3(u8* filename){
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mp3_decoder_t mp3;
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mp3_info_t info;
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int drv_num = 0;
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int frame_size = 0;
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u32 read_length = 0;
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FRESULT res;
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FATFS m_fs;
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FIL m_file[2];
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char logical_drv[4]; //root diretor
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char abs_path[32]; //Path to input file
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DWORD bytes_left;
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DWORD file_size;
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int i = 0;
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int bw = 0;
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volatile u32 tim1 = 0;
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volatile u32 tim2 = 0;
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//WavHeader pwavHeader;
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u32 wav_length = 0;
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u32 wav_offset = 0;
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int *ptx_buf;
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drv_num = FATFS_RegisterDiskDriver(&SD_disk_Driver);
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if(drv_num < 0){
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printf("Rigester disk driver to FATFS fail.\n");
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return;
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}else{
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logical_drv[0] = drv_num + '0';
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logical_drv[1] = ':';
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logical_drv[2] = '/';
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logical_drv[3] = 0;
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}
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if(f_mount(&m_fs, logical_drv, 1)!= FR_OK){
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printf("FATFS mount logical drive fail, please format DISK to FAT16/32.\n");
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goto unreg;
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}
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memset(abs_path, 0x00, sizeof(abs_path));
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strcpy(abs_path, logical_drv);
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sprintf(&abs_path[strlen(abs_path)],"%s", filename);
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//Open source file
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res = f_open(&m_file[0], abs_path, FA_OPEN_EXISTING | FA_READ); // open read only file
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if(res != FR_OK){
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printf("Open source file %s fail.\n", filename);
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goto umount;
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}
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file_size = (&m_file[0])->fsize;
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bytes_left = file_size;
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printf("File size is %d\n",file_size);
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mp3 = mp3_create();
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if(!mp3)
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{
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printf("mp3 context create fail\n");
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goto exit;
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}
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tim1 = rtw_get_current_time();
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do{
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/* Read a block */
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if(bytes_left >= INPUT_FRAME_SIZE)
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res = f_read(&m_file[0], MP3_Buf, INPUT_FRAME_SIZE,(UINT*)&read_length);
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else if(bytes_left > 0)
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res = f_read(&m_file[0], MP3_Buf, bytes_left,(UINT*)&read_length);
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if((res != FR_OK))
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{
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printf("Wav play done !\n");
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break;
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}
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frame_size = mp3_decode(mp3, MP3_Buf, INPUT_FRAME_SIZE, WAV_Buf, &info);
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bytes_left = bytes_left - frame_size;
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f_lseek(&m_file[0], (file_size-bytes_left));
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//printf("frame size [%d], Decoded bytes [%d]\n",frame_size,info.audio_bytes);
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retry:
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ptx_buf = i2s_get_tx_page(&i2s_obj);
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if(ptx_buf){
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if(info.audio_bytes < I2S_DMA_PAGE_SIZE){
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/* if valid audio data short than a page, make sure the rest of the page set to 0*/
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memset((void*)ptx_buf, 0x00, I2S_DMA_PAGE_SIZE);
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memcpy((void*)ptx_buf, (void*)WAV_Buf, info.audio_bytes);
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}else
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memcpy((void*)ptx_buf, (void*)WAV_Buf, info.audio_bytes);
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i2s_send_page(&i2s_obj, (uint32_t*)ptx_buf);
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}else{
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vTaskDelay(1);
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goto retry;
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}
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}while(read_length > 0);
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tim2 = rtw_get_current_time();
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printf("Decode time = %dms\n",(tim2-tim1));
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printf("PCM done\n");
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exit:
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// close source file
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res = f_close(&m_file[0]);
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if(res){
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printf("close file (%s) fail.\n", filename);
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}
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umount:
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if(f_mount(NULL, logical_drv, 1) != FR_OK){
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printf("FATFS unmount logical drive fail.\n");
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}
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unreg:
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if(FATFS_UnRegisterDiskDriver(drv_num))
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printf("Unregister disk driver from FATFS fail.\n");
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}
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void example_audio_mp3_thread(void* param){
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printf("Audio codec demo begin......\n");
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i2s_obj.channel_num = NUM_CHANNELS;
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i2s_obj.sampling_rate = SAMPLING_FREQ;
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i2s_obj.word_length = WL_16b;
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i2s_obj.direction = I2S_DIR_TXRX;
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i2s_init(&i2s_obj, I2S_SCLK_PIN, I2S_WS_PIN, I2S_SD_PIN);
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i2s_set_dma_buffer(&i2s_obj, (char*)i2s_tx_buf, (char*)i2s_rx_buf, \
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I2S_DMA_PAGE_NUM, I2S_DMA_PAGE_SIZE);
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i2s_tx_irq_handler(&i2s_obj, (i2s_irq_handler)i2s_tx_complete, (uint32_t)&i2s_obj);
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i2s_rx_irq_handler(&i2s_obj, (i2s_irq_handler)i2s_rx_complete, (uint32_t)&i2s_obj);
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#if CONFIG_EXAMPLE_MP3_STREAM_SGTL5000
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sgtl5000_enable();
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sgtl5000_setVolume(0.5);
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#else
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alc5651_init();
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alc5651_init_interface2();
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#endif
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char wav[16] = FILE_NAME;
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audio_play_sd_mp3(wav);
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exit:
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vTaskDelete(NULL);
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}
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void example_audio_mp3(void)
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{
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if(xTaskCreate(example_audio_mp3_thread, ((const char*)"example_audio_mp3_thread"), 2000, NULL, tskIDLE_PRIORITY + 1, NULL) != pdPASS)
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printf("\n\r%s xTaskCreate(example_audio_mp3_thread) failed", __FUNCTION__);
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}
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