145 lines
3.3 KiB
C
145 lines
3.3 KiB
C
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#include <rtthread.h>
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#include <rtdevice.h>
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#include <finsh.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "audio_device.h"
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#define BUFSZ 2048
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struct RIFF_HEADER_DEF
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{
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char riff_id[4]; // 'R','I','F','F'
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uint32_t riff_size;
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char riff_format[4]; // 'W','A','V','E'
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};
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struct WAVE_FORMAT_DEF
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{
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uint16_t FormatTag;
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uint16_t Channels;
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uint32_t SamplesPerSec;
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uint32_t AvgBytesPerSec;
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uint16_t BlockAlign;
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uint16_t BitsPerSample;
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};
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struct FMT_BLOCK_DEF
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{
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char fmt_id[4]; // 'f','m','t',' '
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uint32_t fmt_size;
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struct WAVE_FORMAT_DEF wav_format;
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};
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struct DATA_BLOCK_DEF
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{
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char data_id[4]; // 'R','I','F','F'
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uint32_t data_size;
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};
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struct wav_info
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{
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struct RIFF_HEADER_DEF header;
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struct FMT_BLOCK_DEF fmt_block;
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struct DATA_BLOCK_DEF data_block;
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};
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static char file_name[32];
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void wavplay_thread_entry(void *parameter)
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{
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FILE *fp = NULL;
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uint16_t *buffer = NULL;
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struct wav_info *info = NULL;
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fp = fopen(file_name, "rb");
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if (!fp)
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{
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printf("open file failed!\n");
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goto __exit;
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}
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info = (struct wav_info *) malloc(sizeof(*info));
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if (!info) goto __exit;
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if (fread(&(info->header), sizeof(struct RIFF_HEADER_DEF), 1, fp) != 1) goto __exit;
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if (fread(&(info->fmt_block), sizeof(struct FMT_BLOCK_DEF), 1, fp) != 1) goto __exit;
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if (fread(&(info->data_block), sizeof(struct DATA_BLOCK_DEF), 1, fp) != 1) goto __exit;
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printf("wav information:\n");
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printf("samplerate %u\n", info->fmt_block.wav_format.SamplesPerSec);
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printf("channel %u\n", info->fmt_block.wav_format.Channels);
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audio_device_init();
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audio_device_open();
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audio_device_set_rate(info->fmt_block.wav_format.SamplesPerSec);
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while (!feof(fp))
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{
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int length;
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buffer = (uint16_t *)audio_device_get_buffer(RT_NULL);
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length = fread(buffer, 1, BUFSZ, fp);
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if (length)
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{
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if (info->fmt_block.wav_format.Channels == 1)
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{
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/* extend to stereo channels */
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int index;
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uint16_t *ptr;
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ptr = (uint16_t *)((uint8_t *)buffer + BUFSZ * 2);
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for (index = 1; index < BUFSZ / 2; index ++)
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{
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*ptr = *(ptr - 1) = buffer[BUFSZ / 2 - index];
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ptr -= 2;
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}
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length = length * 2;
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}
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audio_device_write((uint8_t *)buffer, length);
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}
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else
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{
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audio_device_put_buffer((uint8_t *)buffer);
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break;
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}
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}
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audio_device_close();
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__exit:
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if (fp) fclose(fp);
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if (info) free(info);
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}
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int wavplay(int argc, char **argv)
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{
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rt_thread_t tid = RT_NULL;
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if (argc != 2)
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{
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printf("Usage:\n");
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printf("wavplay song.wav\n");
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return 0;
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}
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memset(file_name, 0, sizeof(file_name));
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memcpy(file_name, argv[1], strlen(argv[1]));
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tid = rt_thread_create("wayplay",
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wavplay_thread_entry,
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RT_NULL,
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1024 * 8,
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22,
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10);
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if (tid != RT_NULL)
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rt_thread_startup(tid);
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}
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MSH_CMD_EXPORT(wavplay, wavplay song.wav);
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