144 lines
2.9 KiB
C
144 lines
2.9 KiB
C
#include "typesdef.h"
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#include "list.h"
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#include "dev.h"
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#include "devid.h"
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#include "hal/pdm.h"
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#include <stdio.h>
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#include "string.h"
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#include "pdm_audio.h"
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struct audio_priv
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{
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struct hgpdm_v0* pdm_hdl;
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void *current_node;
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void *reg_node;
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//buf暂定open后,就不改变
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int buf_size;
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set_buf set_buf;
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get_buf get_buf;
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//私有结构元素
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void *priv_el;
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};
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static void audio_irq(uint32 irq, uint32 irq_data)
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{
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//半中断,切换下一个buf,如果不存在,使用当前的
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struct audio_priv *priv = (struct audio_priv *)irq_data;
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void *buf;
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if(irq == PDM_IRQ_FLAG_DMA_HF)
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{
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buf = priv->set_buf(priv->priv_el,&priv->reg_node);
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//如果reg_node为NULL,则音频录音buf还是原来的buf
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if(priv->reg_node)
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{
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pdm_read((struct pdm_device *)priv->pdm_hdl, buf, priv->buf_size);
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}
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}
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else if(irq == PDM_IRQ_FLAG_DMA_OV)
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{
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//半中断有配置新的buf,则将完成的录音帧通知应用层,如果为NULL,则代表没有配置新的buf,只能使用旧的buf
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if(priv->reg_node)
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{
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priv->get_buf(priv->priv_el,priv->current_node);
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priv->current_node = priv->reg_node;
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priv->reg_node = NULL;
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}
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}
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}
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void *pdm_audio_open(enum pdm_sample_freq freq,enum pdm_channel channel)
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{
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int ret = 0;
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int res = RET_OK;
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struct audio_priv *priv = NULL;
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priv = (struct audio_priv*)malloc(sizeof(struct audio_priv));
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if(!priv)
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{
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ret = -1;
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goto audio_open_err;
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}
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memset(priv,0,sizeof(struct audio_priv));
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priv->pdm_hdl = (struct hgpdm_v0*)dev_get(HG_PDM0_DEVID);
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if(!priv->pdm_hdl)
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{
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ret = -2;
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goto audio_open_err;
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}
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//启动pdm
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res = pdm_open((struct pdm_device*)priv->pdm_hdl, freq, channel);
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if(res != RET_OK)
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{
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ret = -3;
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goto audio_open_err;
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}
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pdm_request_irq((struct pdm_device*)priv->pdm_hdl, PDM_IRQ_FLAG_DMA_OV, (pdm_irq_hdl)audio_irq, (uint32_t)priv);
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pdm_request_irq((struct pdm_device*)priv->pdm_hdl, PDM_IRQ_FLAG_DMA_HF, (pdm_irq_hdl)audio_irq, (uint32_t)priv);
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return priv;
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audio_open_err:
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if(priv)
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{
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free(priv);
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}
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return NULL;
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}
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void pdm_audio_register(void *audio_hdl,void *priv_el,int play_size,set_buf audio_set_buf,get_buf audio_get_buf)
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{
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struct audio_priv *priv = (struct audio_priv*)audio_hdl;
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priv->buf_size = play_size;
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priv->set_buf = audio_set_buf;
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priv->get_buf = audio_get_buf;
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priv->priv_el = priv_el;
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}
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int pdm_audio_start(void *audio_hdl)
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{
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int ret = 0;
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int res = 0;
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void *buf;
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struct audio_priv *priv = (struct audio_priv*)audio_hdl;
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buf = priv->set_buf(priv->priv_el,&priv->current_node);
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if(!buf)
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{
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ret = -1;
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goto audio_run_err;
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}
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res = pdm_read((struct pdm_device *)priv->pdm_hdl, buf, priv->buf_size);
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//pdm参数输入错误
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if(res < 0)
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{
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ret = -2;
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goto audio_run_err;
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}
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audio_run_err:
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return res;
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}
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void pdm_audio_close(void *audio_hdl)
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{
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struct audio_priv *priv;
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if(audio_hdl)
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{
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priv = (struct audio_priv*)audio_hdl;
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pdm_close((struct pdm_device*)priv->pdm_hdl);
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free(priv);
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}
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}
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