C++ bytes_to_frames函数代码示例

OStack程序员社区-中国程序员成长平台 › 门户 › 编程› C++›C++教程

原作者: [db:作者] 来自: [db:来源] 收藏邀请

本文整理汇总了C++中bytes_to_frames函数的典型用法代码示例。如果您正苦于以下问题：C++ bytes_to_frames函数的具体用法？C++ bytes_to_frames怎么用？C++ bytes_to_frames使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了bytes_to_frames函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: snd_em8300_pcm_indirect_playback_pointer

static inline snd_pcm_uframes_t
snd_em8300_pcm_indirect_playback_pointer(struct snd_pcm_substream *substream,
					 snd_em8300_pcm_indirect_t *rec, unsigned int ptr)
{
	int bytes = ptr - rec->hw_io;
	if (bytes < 0)
		bytes += rec->hw_buffer_size;
	rec->hw_io = ptr;
	rec->hw_ready -= bytes;
	rec->sw_io += bytes;
	if (rec->sw_io >= rec->sw_buffer_size)
		rec->sw_io -= rec->sw_buffer_size;
	if (substream->ops->ack)
		substream->ops->ack(substream);
	return bytes_to_frames(substream->runtime, rec->sw_io);
}

开发者ID:austriancoder，项目名称:v4l2-em8300-old，代码行数:16，代码来源:em8300_alsa.c

示例2: at91_pcm_pointer

static snd_pcm_uframes_t at91_pcm_pointer(
	struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct at91_runtime_data *prtd = runtime->private_data;
	struct at91_pcm_dma_params *params = prtd->params;
	dma_addr_t ptr;
	snd_pcm_uframes_t x;

	ptr = (dma_addr_t) at91_ssc_read(params->ssc_base + params->pdc->xpr);
	x = bytes_to_frames(runtime, ptr - prtd->dma_buffer);

	if (x == runtime->buffer_size)
		x = 0;
	return x;
}

开发者ID:maraz，项目名称:linux-2.6，代码行数:16，代码来源:at91-pcm.c

示例3: snd_bcm2835_pcm_pointer

/* pointer callback */
static snd_pcm_uframes_t
snd_bcm2835_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	bcm2835_alsa_stream_t *alsa_stream = runtime->private_data;

	audio_info(" .. IN\n");

	audio_debug("pcm_pointer... (%d) hwptr=%d appl=%d pos=%d\n", 0,
		      frames_to_bytes(runtime, runtime->status->hw_ptr),
		      frames_to_bytes(runtime, runtime->control->appl_ptr),
		      alsa_stream->pos);

	audio_info(" .. OUT\n");
	return bytes_to_frames(runtime, alsa_stream->pos);
}

开发者ID:eyecatchup，项目名称:razdroid-kernel，代码行数:17，代码来源:bcm2835-pcm.c

示例4: pxa3xx_pcm_pointer

static snd_pcm_uframes_t
pxa3xx_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct pxa3xx_runtime_data *prtd = runtime->private_data;
	dma_addr_t ptr;
	snd_pcm_uframes_t x;

	ptr = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
			 DSADR(prtd->dma_ch) : DTADR(prtd->dma_ch);
	x = bytes_to_frames(runtime, ptr - runtime->dma_addr);

	if (x == runtime->buffer_size)
		x = 0;
	return x;
}

开发者ID:abgoyal，项目名称:OpenX2-kernel-original，代码行数:16，代码来源:pxa3xx-pcm.c

示例5: snd_ad1889_playback_pointer

/* Called in atomic context with IRQ disabled */
static snd_pcm_uframes_t
snd_ad1889_playback_pointer(struct snd_pcm_substream *ss)
{
	size_t ptr = 0;
	struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);

	if (unlikely(!(chip->wave.reg & AD_DS_WSMC_WAEN)))
		return 0;

	ptr = ad1889_readl(chip, AD_DMA_WAVCA);
	ptr -= chip->wave.addr;
	
	snd_assert((ptr >= 0) && (ptr < chip->wave.size), return 0);
	
	return bytes_to_frames(ss->runtime, ptr);
}

开发者ID:3sOx，项目名称:asuswrt-merlin，代码行数:17，代码来源:ad1889.c

示例6: snd_ad1889_capture_pointer

/* Called in atomic context with IRQ disabled */
static snd_pcm_uframes_t
snd_ad1889_capture_pointer(struct snd_pcm_substream *ss)
{
	size_t ptr = 0;
	struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);

	if (unlikely(!(chip->ramc.reg & AD_DS_RAMC_ADEN)))
		return 0;

	ptr = ad1889_readl(chip, AD_DMA_ADCCA);
	ptr -= chip->ramc.addr;

	snd_assert((ptr >= 0) && (ptr < chip->ramc.size), return 0);
	
	return bytes_to_frames(ss->runtime, ptr);
}

开发者ID:3sOx，项目名称:asuswrt-merlin，代码行数:17，代码来源:ad1889.c

示例7: ath79_pcm_pointer

static snd_pcm_uframes_t ath79_pcm_pointer(struct snd_pcm_substream *ss)
{
	struct snd_pcm_runtime *runtime = ss->runtime;
	struct ath79_pcm_rt_priv *rtpriv;
	snd_pcm_uframes_t ret = 0;

	rtpriv = runtime->private_data;

	if(rtpriv->last_played == NULL)
		ret = 0;
	else
		ret = rtpriv->last_played->BufPtr - runtime->dma_addr;

	ret = bytes_to_frames(runtime, ret);
	return ret;
}

开发者ID:ConorOG，项目名称:openwrt-misc，代码行数:16，代码来源:ath79-pcm.c

示例8: s3c_dma_pointer

static snd_pcm_uframes_t
s3c_dma_pointer(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct s3c24xx_runtime_data *prtd = runtime->private_data;
	unsigned long res;
	dma_addr_t src, dst;

	pr_debug("Entered %s\n", __func__);

	spin_lock(&prtd->lock);
	s3c2410_dma_getposition(prtd->params->channel, &src, &dst);

	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
		res = dst - prtd->dma_start;
	else
		res = src - prtd->dma_start;

	spin_unlock(&prtd->lock);

	pr_debug("Pointer %x %x\n", src, dst);

	/* we seem to be getting the odd error from the pcm library due
	 * to out-of-bounds pointers. this is maybe due to the dma engine
	 * not having loaded the new values for the channel before being
	 * callled... (todo - fix )
	 */

/* To fix the pcm buffer underrun in case of high busy state ( ex. Starting broswer ) 2010.06.22*/
	if(substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 
	{
		if (res >= snd_pcm_lib_buffer_bytes(substream) * ANDROID_BUF_NUM) {
			if (res == snd_pcm_lib_buffer_bytes(substream) * ANDROID_BUF_NUM)
				res = 0;
		}
	} 
	else 
	{
		if (res >= snd_pcm_lib_buffer_bytes(substream)) {
			if (res == snd_pcm_lib_buffer_bytes(substream))
				res = 0;
		}
	}

	return bytes_to_frames(substream->runtime, res);
}

开发者ID:AustinBleax，项目名称:Bali_SK4G，代码行数:46，代码来源:s3c-dma.c

示例9: hsw_pcm_pointer

static snd_pcm_uframes_t hsw_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct hsw_priv_data *pdata =
		snd_soc_platform_get_drvdata(rtd->platform);
	struct hsw_pcm_data *pcm_data = snd_soc_pcm_get_drvdata(rtd);
	struct sst_hsw *hsw = pdata->hsw;
	snd_pcm_uframes_t offset;

	offset = bytes_to_frames(runtime,
		sst_hsw_get_dsp_position(hsw, pcm_data->stream));

	dev_dbg(rtd->dev, "PCM: DMA pointer %zu bytes\n",
		frames_to_bytes(runtime, (u32)offset));
	return offset;
}

开发者ID:908626950，项目名称:linux，代码行数:17，代码来源:sst-haswell-pcm.c

示例10: idma_pointer

static snd_pcm_uframes_t
idma_pointer(struct snd_pcm_substream *substream)
{
    struct snd_pcm_runtime *runtime = substream->runtime;
    struct idma_ctrl *prtd = runtime->private_data;
    dma_addr_t src;
    unsigned long res;

    spin_lock(&prtd->lock);

    idma_getpos(&src);
    res = src - prtd->start;

    spin_unlock(&prtd->lock);

    return bytes_to_frames(substream->runtime, res);
}

开发者ID:alianmohammad，项目名称:gem5-linux-kernel，代码行数:17，代码来源:idma.c

示例11: snd_dmaengine_pcm_pointer

/**
 * snd_dmaengine_pcm_pointer - dmaengine based PCM pointer implementation
 * @substream: PCM substream
 *
 * This function can be used as the PCM pointer callback for dmaengine based PCM
 * driver implementations.
 */
snd_pcm_uframes_t snd_dmaengine_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
	struct dma_tx_state state;
	enum dma_status status;
	unsigned int buf_size;
	unsigned int pos = 0;

	status = dmaengine_tx_status(prtd->dma_chan, prtd->cookie, &state);
	if (status == DMA_IN_PROGRESS || status == DMA_PAUSED) {
		buf_size = snd_pcm_lib_buffer_bytes(substream);
		if (state.residue > 0 && state.residue <= buf_size)
			pos = buf_size - state.residue;
	}

	return bytes_to_frames(substream->runtime, pos);
}

开发者ID:GalaxyTab4，项目名称:maxicm_kernel_samsung_degaswifi，代码行数:24，代码来源:soc-dmaengine-pcm.c

示例12: snd_vortex_pcm_pointer

/* pointer callback */
static snd_pcm_uframes_t snd_vortex_pcm_pointer(snd_pcm_substream_t * substream)
{
	vortex_t *chip = snd_pcm_substream_chip(substream);
	stream_t *stream = (stream_t *) substream->runtime->private_data;
	int dma = stream->dma;
	snd_pcm_uframes_t current_ptr = 0;

	spin_lock(&chip->lock);
	if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
		current_ptr = vortex_adbdma_getlinearpos(chip, dma);
#ifndef CHIP_AU8810
	else
		current_ptr = vortex_wtdma_getlinearpos(chip, dma);
#endif
	//printk(KERN_INFO "vortex: pointer = 0x%x\n", current_ptr);
	spin_unlock(&chip->lock);
	return (bytes_to_frames(substream->runtime, current_ptr));
}

开发者ID:FelipeFernandes1988，项目名称:Alice-1121-Modem，代码行数:19，代码来源:au88x0_pcm.c

示例13: snd_ps3_pcm_pointer

/*
 * report current pointer
 */
static snd_pcm_uframes_t snd_ps3_pcm_pointer(
	struct snd_pcm_substream *substream)
{
	struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
	size_t bytes;
	snd_pcm_uframes_t ret;

	spin_lock(&card->dma_lock);
	{
		bytes = (size_t)(card->dma_last_transfer_vaddr[SND_PS3_CH_L] -
				 card->dma_start_vaddr[SND_PS3_CH_L]);
	}
	spin_unlock(&card->dma_lock);

	ret = bytes_to_frames(substream->runtime, bytes * 2);

	return ret;
};

开发者ID:CSCLOG，项目名称:beaglebone，代码行数:21，代码来源:snd_ps3.c

示例14: cns3xxx_pcm_pointer

static snd_pcm_uframes_t
cns3xxx_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct cns3xxx_runtime_data *prtd = runtime->private_data;

	dma_addr_t ptr = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
			            DMAC_READ_CHREGS (prtd->dma_ch, PL330_SA) : 
                        DMAC_READ_CHREGS (prtd->dma_ch, PL330_DA) ;
	snd_pcm_uframes_t x = bytes_to_frames(runtime, ptr - runtime->dma_addr);

#ifdef __DEBUG_PATH
//	printk("%s=>%d\n", __FUNCTION__, __LINE__);
#endif
//	static int dumponce = 1;
//
//    if(dumponce)
//		{
//    	int counter = 0;
//    	unsigned char *pBuf = (unsigned char *)__bus_to_virt(runtime->dma_addr);
//    	
//    	if(*pBuf) {
//    	printk("\n>>>>>>>>>> Dump Sound Buffer 11 <<<<<<<<<<<<\n");
//    	for(counter=0; counter<128; counter++) {
//    		if((counter%16 == 0) && counter)
//    			printk("\n");
//    		printk("%02X  ", *(pBuf+counter));
//    	}
// 			printk("\n");
//    	dumponce = 0;
//    	}
//    }

    //printk ("%s:Transmitted %d frame [sa:%x;da:%x]\n",__FUNCTION__,(int)x,DMAC_READ_CHREGS(prtd->dma_ch,PL330_SA),DMAC_READ_CHREGS(prtd->dma_ch,PL330_DA));

	if (x >= runtime->buffer_size)
    {
//#ifdef CNS3XXX_AUDIO_DEBUG
        //printk ("Transmitted all the frames [%d in total]\n",(int)x);
//#endif
		x = 0;
    }
	return x;
}

开发者ID:mausvt，项目名称:seagate_central_cns3420_2-6-35，代码行数:44，代码来源:cns3xxx-pcm.c

示例15: hi3630_srcup_normal_pointer

static snd_pcm_uframes_t hi3630_srcup_normal_pointer(struct snd_pcm_substream *substream)
{
	snd_pcm_uframes_t offset = 0;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct hi3630_srcup_runtime_data *prtd = substream->runtime->private_data;
	unsigned int period_cur = 0;
	unsigned int period_size = 0;

	spin_lock(&prtd->lock);
	period_cur = prtd->period_cur;
	period_size = prtd->period_size;
	spin_unlock(&prtd->lock);

	offset = bytes_to_frames(runtime, period_cur * period_size);
	if (offset >= runtime->buffer_size)
		offset = 0;

	return offset;
}

开发者ID:HuaweiHonor4C，项目名称:kernel_hi6210sft_mm，代码行数:19，代码来源:hi3630_srcup_normal.c

示例16: sst_byt_pcm_pointer

static snd_pcm_uframes_t sst_byt_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct sst_byt_priv_data *pdata =
		snd_soc_platform_get_drvdata(rtd->platform);
	struct sst_byt_pcm_data *pcm_data = snd_soc_pcm_get_drvdata(rtd);
	struct sst_byt *byt = pdata->byt;
	snd_pcm_uframes_t offset;
	int pos;

	pos = sst_byt_get_dsp_position(byt, pcm_data->stream,
				       snd_pcm_lib_buffer_bytes(substream));
	offset = bytes_to_frames(runtime, pos);

	dev_dbg(rtd->dev, "PCM: DMA pointer %zu bytes\n",
		frames_to_bytes(runtime, (u32)offset));
	return offset;
}

开发者ID:908626950，项目名称:linux，代码行数:19，代码来源:sst-baytrail-pcm.c

示例17: mxs_pcm_pointer

static snd_pcm_uframes_t
mxs_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct mxs_runtime_data *prtd = runtime->private_data;
	struct mxs_dma_info dma_info;
	unsigned int offset;
	dma_addr_t pos;

	mxs_dma_get_info(prtd->params->dma_ch, &dma_info);
	pos = dma_info.buf_addr;

	offset = bytes_to_frames(runtime, pos - runtime->dma_addr);

	if (offset >= runtime->buffer_size)
		offset = 0;

	return offset;
}

开发者ID:fread-ink，项目名称:fread-kernel-k4，代码行数:19，代码来源:mxs-pcm.c

示例18: bf5xx_pcm_pointer

static snd_pcm_uframes_t bf5xx_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct sport_device *sport = runtime->private_data;
	unsigned int diff;
	snd_pcm_uframes_t frames;
	pr_debug("%s enter\n", __func__);
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		diff = sport_curr_offset_tx(sport);
	} else {
		diff = sport_curr_offset_rx(sport);
	}

	if (diff == snd_pcm_lib_buffer_bytes(substream))
		diff = 0;

	frames = bytes_to_frames(substream->runtime, diff);

	return frames;
}

开发者ID:MiniBlu，项目名称:cm11_kernel_htc_msm8974a3ul，代码行数:20，代码来源:bf5xx-i2s-pcm.c

示例19: s5p_pcm_pointer

static snd_pcm_uframes_t 
	s5p_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct s5p_runtime_data *prtd = runtime->private_data;
	unsigned long res;
	dma_addr_t src, dst;

	spin_lock(&prtd->lock);

	if(s3c_pcm_pdat.lp_mode)
	   s3ci2s_func->dma_getpos(&src, &dst);
	
	/* By Jung */
	res = prtd->dma_pos - prtd->dma_start;

	spin_unlock(&prtd->lock);

	s3cdbg("Pointer %x %x\n", src, dst);

	/* we seem to be getting the odd error from the pcm library due
	 * to out-of-bounds pointers. this is maybe due to the dma engine
	 * not having loaded the new values for the channel before being
	 * callled... (todo - fix )
	 */
	
	/* By Jung */
	if(substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		if (res >= snd_pcm_lib_buffer_bytes(substream) * ANDROID_BUF_NUM) {
			if (res == snd_pcm_lib_buffer_bytes(substream) * ANDROID_BUF_NUM)
				res = 0;
		}
	} else {
		if (res >= snd_pcm_lib_buffer_bytes(substream)) {
			if (res == snd_pcm_lib_buffer_bytes(substream))
				res = 0;
		}
	}

	return bytes_to_frames(substream->runtime, res);
}

开发者ID:rubensollie，项目名称:Eclair-Kernel，代码行数:41，代码来源:s3c-pcm-lp.c

示例20: snd_atiixp_pcm_pointer

/*
 * pointer callback simplly reads XXX_DMA_DT_CUR register as the current
 * position.  when SG-buffer is implemented, the offset must be calculated
 * correctly...
 */
static snd_pcm_uframes_t snd_atiixp_pcm_pointer(snd_pcm_substream_t *substream)
{
    atiixp_t *chip = snd_pcm_substream_chip(substream);
    snd_pcm_runtime_t *runtime = substream->runtime;
    atiixp_dma_t *dma = (atiixp_dma_t *)runtime->private_data;
    unsigned int curptr;
    int timeout = 1000;

    while (timeout--) {
        curptr = readl(chip->remap_addr + dma->ops->dt_cur);
        if (curptr < dma->buf_addr)
            continue;
        curptr -= dma->buf_addr;
        if (curptr >= dma->buf_bytes)
            continue;
        return bytes_to_frames(runtime, curptr);
    }
    snd_printd("atiixp: invalid DMA pointer read 0x%x (buf=%x)\n",
               readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);
    return 0;
}

开发者ID:idtek，项目名称:linux-2.6.11，代码行数:26，代码来源:atiixp.c

注：本文中的bytes_to_frames函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。