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C++ snd_pcm_hw_constraint_list函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了C++中snd_pcm_hw_constraint_list函数的典型用法代码示例。如果您正苦于以下问题：C++ snd_pcm_hw_constraint_list函数的具体用法？C++ snd_pcm_hw_constraint_list怎么用？C++ snd_pcm_hw_constraint_list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snd_pcm_hw_constraint_list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: ctp_vb_cs42l73_startup

static int ctp_vb_cs42l73_startup(struct snd_pcm_substream *substream)
{
	unsigned int device = substream->pcm->device;
	pr_debug("%s - applying rate constraint\n", __func__);
	switch (device) {
	case CTP_VB_AUD_ASP_DEV:
	case CTP_VB_AUD_PROBE_DEV:
	case CTP_VB_COMMS_FM_DEV:
	case CTP_VB_AUD_VIRTUAL_ASP_DEV:
		snd_pcm_hw_constraint_list(substream->runtime, 0,
			SNDRV_PCM_HW_PARAM_RATE, &constraints_48000);
		break;
	case CTP_VB_AUD_VSP_DEV:
		snd_pcm_hw_constraint_list(substream->runtime, 0,
				SNDRV_PCM_HW_PARAM_RATE,
				&constraints_16000);
		ctp_config_voicecall_flag(substream, true);
		break;
	case CTP_VB_COMMS_BT_SCO_DEV:
		snd_pcm_hw_constraint_list(substream->runtime, 0,
				SNDRV_PCM_HW_PARAM_RATE,
				&constraints_8000_16000);
		break;
	default:
		pr_err("%s: Invalid device %d\n", __func__, device);
		return -EINVAL;
	}
	return 0;
}
开发者ID:AirShark，项目名称:android_kernel_lenovo_redhookbay，代码行数:29，代码来源:ctp_vb_cs42l73.c


示例2: mt_pcm_mrgrx_open

static int mt_pcm_mrgrx_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	int ret = 0;

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

	snd_soc_set_runtime_hwparams(substream, &mt_pcm_mrgrx_hardware);

	ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
					 &mrgrx_constraints_sample_rates);
	if (unlikely(ret < 0))
		pr_err("snd_pcm_hw_constraint_list failed: 0x%x\n", ret);

	ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
	if (unlikely(ret < 0))
		pr_err("snd_pcm_hw_constraint_integer failed: 0x%x\n", ret);

	mt_afe_main_clk_on();
	mt_afe_dac_clk_on();

	if (ret < 0) {
		pr_err("%s mt_pcm_mrgrx_close\n", __func__);
		mt_pcm_mrgrx_close(substream);
		return ret;
	}

	pr_debug("%s return\n", __func__);
	return 0;
}
开发者ID:P-D-A，项目名称:android_kernel_lge_mt6753，代码行数:30，代码来源:mt_afe_pcm_mrgrx.c


示例3: arizona_startup

static int arizona_startup(struct snd_pcm_substream *substream,
			   struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
	struct arizona_dai_priv *dai_priv = &priv->dai[dai->id - 1];
	const struct snd_pcm_hw_constraint_list *constraint;
	unsigned int base_rate;

	switch (dai_priv->clk) {
	case ARIZONA_CLK_SYSCLK:
		base_rate = priv->sysclk;
		break;
	case ARIZONA_CLK_ASYNCCLK:
		base_rate = priv->asyncclk;
		break;
	default:
		return 0;
	}

	if (base_rate == 0)
		return 0;

	if (base_rate % 8000)
		constraint = &arizona_44k1_constraint;
	else
		constraint = &arizona_48k_constraint;

	return snd_pcm_hw_constraint_list(substream->runtime, 0,
					  SNDRV_PCM_HW_PARAM_RATE,
					  constraint);
}
开发者ID:4pao，项目名称:android_kernel_hardkernel_odroidxu3，代码行数:32，代码来源:arizona.c


示例4: msm_lsm_open

static int msm_lsm_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct lsm_priv *prtd;
	int ret = 0;

	pr_debug("%s\n", __func__);
	prtd = kzalloc(sizeof(struct lsm_priv), GFP_KERNEL);
	if (!prtd) {
		pr_err("%s: Failed to allocate memory for lsm_priv\n",
		       __func__);
		return -ENOMEM;
	}
	spin_lock_init(&prtd->event_lock);
	init_waitqueue_head(&prtd->event_wait);
	prtd->substream = substream;
	runtime->private_data = prtd;
	runtime->hw = msm_pcm_hardware_capture;

	ret = snd_pcm_hw_constraint_list(runtime, 0,
				SNDRV_PCM_HW_PARAM_RATE,
				&constraints_sample_rates);
	if (ret < 0)
		pr_info("%s: snd_pcm_hw_constraint_list failed ret %d\n",
			 __func__, ret);
	/* Ensure that buffer size is a multiple of period size */
	ret = snd_pcm_hw_constraint_integer(runtime,
			    SNDRV_PCM_HW_PARAM_PERIODS);
	if (ret < 0)
		pr_info("%s: snd_pcm_hw_constraint_integer failed ret %d\n",
			__func__, ret);

	ret = snd_pcm_hw_constraint_minmax(runtime,
		SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
		CAPTURE_MIN_NUM_PERIODS * CAPTURE_MIN_PERIOD_SIZE,
		CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE);
	if (ret < 0)
		pr_info("%s: constraint for buffer bytes min max ret = %d\n",
			__func__, ret);
	ret = snd_pcm_hw_constraint_step(runtime, 0,
		SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
	if (ret < 0) {
		pr_info("%s: constraint for period bytes step ret = %d\n",
			__func__, ret);
	}
	ret = snd_pcm_hw_constraint_step(runtime, 0,
		SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
	if (ret < 0)
		pr_info("%s: constraint for buffer bytes step ret = %d\n",
			__func__, ret);
	prtd->lsm_client = q6lsm_client_alloc(
				(lsm_app_cb)lsm_event_handler, prtd);
	if (!prtd->lsm_client) {
		pr_err("%s: Could not allocate memory\n", __func__);
		kfree(prtd);
		runtime->private_data = NULL;
		return -ENOMEM;
	}
	return 0;
}
开发者ID:AndroidGX，项目名称:SimpleGX-L-5.0.2_BOE2_G901F，代码行数:60，代码来源:msm-lsm-client.c


示例5: twl6040_startup

static int twl6040_startup(struct snd_pcm_substream *substream,
			struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
	struct snd_soc_codec *codec = socdev->card->codec;
	struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec);

	if (!priv->sysclk) {
		dev_err(codec->dev,
			"no mclk configured, call set_sysclk() on init\n");
		return -EINVAL;
	}

	/*
	 * capture is not supported at 17.64 MHz,
	 * it's reserved for headset low-power playback scenario
	 */
	if ((priv->sysclk == 17640000) && substream->stream) {
		dev_err(codec->dev,
			"capture mode is not supported at %dHz\n",
			priv->sysclk);
		return -EINVAL;
	}

	snd_pcm_hw_constraint_list(substream->runtime, 0,
				SNDRV_PCM_HW_PARAM_RATE,
				priv->sysclk_constraints);

	return 0;
}
开发者ID:3sOx，项目名称:asuswrt-merlin，代码行数:31，代码来源:twl6040.c


示例6: ak5558_startup

static int ak5558_startup(struct snd_pcm_substream *substream,
			  struct snd_soc_dai *dai)
{
	return snd_pcm_hw_constraint_list(substream->runtime, 0,
					  SNDRV_PCM_HW_PARAM_RATE,
					  &ak5558_rate_constraints);
}
开发者ID:Lyude，项目名称:linux，代码行数:7，代码来源:ak5558.c


示例7: pcm512x_dai_startup_slave

static int pcm512x_dai_startup_slave(struct snd_pcm_substream *substream,
				     struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
	struct device *dev = dai->dev;
	struct regmap *regmap = pcm512x->regmap;

	if (IS_ERR(pcm512x->sclk)) {
		dev_info(dev, "No SCLK, using BCLK: %ld\n",
			 PTR_ERR(pcm512x->sclk));

		/* Disable reporting of missing SCLK as an error */
		regmap_update_bits(regmap, PCM512x_ERROR_DETECT,
				   PCM512x_IDCH, PCM512x_IDCH);

		/* Switch PLL input to BCLK */
		regmap_update_bits(regmap, PCM512x_PLL_REF,
				   PCM512x_SREF, PCM512x_SREF_BCK);
	}

	return snd_pcm_hw_constraint_list(substream->runtime, 0,
					  SNDRV_PCM_HW_PARAM_RATE,
					  &constraints_slave);
}
开发者ID:020gzh，项目名称:linux，代码行数:25，代码来源:pcm512x.c


示例8: mtk_pcm_btcvsd_rx_open

static int mtk_pcm_btcvsd_rx_open(struct snd_pcm_substream *substream)
{
	int ret = 0;
	struct snd_pcm_runtime *runtime = substream->runtime;

	pr_warn("%s\n", __func__);

	ret = AudDrv_btcvsd_Allocate_Buffer(1);

	runtime->hw = mtk_btcvsd_rx_hardware;

	memcpy((void *)(&(runtime->hw)), (void *)&mtk_btcvsd_rx_hardware, sizeof(struct snd_pcm_hardware));

	ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &constraints_sample_rates);


	BT_CVSD_Mem.RX_substream = substream;

	do_gettimeofday(&begin_rx);
	prev_sec_rx = begin_rx.tv_sec;
	prev_usec_rx = begin_rx.tv_usec;

	if (ret < 0)
		pr_warn("snd_pcm_hw_constraint_integer failed\n");

	if (ret < 0) {
		pr_err("ret < 0 mtk_pcm_btcvsd_rx_close\n");
		mtk_pcm_btcvsd_rx_close(substream);
		return ret;
	}

	/* pr_warn("mtk_pcm_btcvsd_open return\n"); */
	return 0;
}
开发者ID:P-D-A，项目名称:android_kernel_lge_mt6753，代码行数:34，代码来源:mt_soc_pcm_btcvsd_rx.c


示例9: adau1977_startup

static int adau1977_startup(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
{
	struct adau1977 *adau1977 = snd_soc_codec_get_drvdata(dai->codec);
	u64 formats = 0;

	if (adau1977->slot_width == 16)
		formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE;
	else if (adau1977->right_j || adau1977->slot_width == 24)
		formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE;

	snd_pcm_hw_constraint_list(substream->runtime, 0,
		SNDRV_PCM_HW_PARAM_RATE, &adau1977->constraints);

	if (adau1977->master)
		snd_pcm_hw_constraint_minmax(substream->runtime,
			SNDRV_PCM_HW_PARAM_RATE, 8000, adau1977->max_master_fs);

	if (formats != 0)
		snd_pcm_hw_constraint_mask64(substream->runtime,
			SNDRV_PCM_HW_PARAM_FORMAT, formats);

	return 0;
}
开发者ID:383530895，项目名称:linux，代码行数:25，代码来源:adau1977.c


示例10: mt_pcm_dl1_awb_open

static int mt_pcm_dl1_awb_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	int ret = 0;

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

	snd_soc_set_runtime_hwparams(substream, &mt_pcm_dl1_awb_hardware);

	ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
					 &mt_pcm_dl1_awb_constraints_rates);
	if (unlikely(ret < 0))
		pr_err("%s snd_pcm_hw_constraint_list failed %d\n", __func__, ret);

	ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);

	if (unlikely(ret < 0))
		pr_err("%s snd_pcm_hw_constraint_integer failed %d\n", __func__, ret);

	/* here open audio clocks */
	mt_afe_main_clk_on();
	mt_afe_emi_clk_on();

	if (unlikely(ret < 0)) {
		pr_err("%s mt_pcm_dl1_awb_close\n", __func__);
		mt_pcm_dl1_awb_close(substream);
		return ret;
	}

	pr_debug("%s return\n", __func__);
	return 0;
}
开发者ID:P-D-A，项目名称:android_kernel_lge_mt6753，代码行数:32，代码来源:mt_afe_pcm_dl1_awb.c


示例11: mtk_pcm_i2s0_open

static int mtk_pcm_i2s0_open(struct snd_pcm_substream *substream)
{
    int ret = 0;
    struct snd_pcm_runtime *runtime = substream->runtime;
    AfeControlSramLock();
    if (GetSramState() == SRAM_STATE_FREE)
    {
        mtk_i2s0_hardware.buffer_bytes_max = GetPLaybackSramFullSize();
        mPlaybackSramState = SRAM_STATE_PLAYBACKFULL;
        SetSramState(mPlaybackSramState);
    }
    else
    {
        mtk_i2s0_hardware.buffer_bytes_max = GetPLaybackSramPartial();
        mPlaybackSramState = SRAM_STATE_PLAYBACKPARTIAL;
        SetSramState(mPlaybackSramState);
    }
    AfeControlSramUnLock();
    runtime->hw = mtk_i2s0_hardware;

    printk("mtk_pcm_i2s0_open\n");

    AudDrv_Clk_On();
    memcpy((void *)(&(runtime->hw)), (void *)&mtk_i2s0_hardware , sizeof(struct snd_pcm_hardware));
    pI2s0MemControl = Get_Mem_ControlT(Soc_Aud_Digital_Block_MEM_DL1);


    ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
                                     &constraints_sample_rates);
    ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);

    if (ret < 0)
    {
        printk("snd_pcm_hw_constraint_integer failed\n");
    }

    //print for hw pcm information
    printk("mtk_pcm_i2s0_open runtime rate = %d channels = %d substream->pcm->device = %d\n",
           runtime->rate, runtime->channels, substream->pcm->device);

    if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
    {
        printk("SNDRV_PCM_STREAM_PLAYBACK mtkalsa_i2s0_playback_constraints\n");
    }
    else
    {

    }

    if (ret < 0)
    {
        printk("mtk_pcm_i2s0_close\n");
        mtk_pcm_i2s0_close(substream);
        return ret;
    }
    printk("mtk_pcm_i2s0_open return\n");
    AudDrv_Clk_Off();
    return 0;
}
开发者ID:AudioGod，项目名称:MediaTek-HelioX10-Kernel，代码行数:59，代码来源:mt_soc_pcm_dl1_i2s0.c


示例12: msm_afe_open

static int msm_afe_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct pcm_afe_info *prtd = NULL;
	int ret = 0;

	prtd = kzalloc(sizeof(struct pcm_afe_info), GFP_KERNEL);
	if (prtd == NULL) {
		pr_err("Failed to allocate memory for msm_audio\n");
		return -ENOMEM;
	} else
		pr_debug("prtd %x\n", (unsigned int)prtd);

	mutex_init(&prtd->lock);
	spin_lock_init(&prtd->dsp_lock);
	prtd->dsp_cnt = 0;

	mutex_lock(&prtd->lock);

	runtime->hw = msm_afe_hardware;
	prtd->substream = substream;
	runtime->private_data = prtd;
	prtd->audio_client = q6asm_audio_client_alloc(
				(app_cb)q6asm_event_handler, prtd);
	if (!prtd->audio_client) {
		pr_debug("%s: Could not allocate memory\n", __func__);
		/*                                   
                                                                      
                                          
                                  
                                 
          
   */
		mutex_unlock(&prtd->lock);
		kfree(prtd);
		/*              */
		return -ENOMEM;
	}
	hrtimer_init(&prtd->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		prtd->hrt.function = afe_hrtimer_callback;
	else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
		prtd->hrt.function = afe_hrtimer_rec_callback;

	mutex_unlock(&prtd->lock);

	ret = snd_pcm_hw_constraint_list(runtime, 0,
				SNDRV_PCM_HW_PARAM_RATE,
				&constraints_sample_rates);
	if (ret < 0)
		pr_err("snd_pcm_hw_constraint_list failed\n");
	/* Ensure that buffer size is a multiple of period size */
	ret = snd_pcm_hw_constraint_integer(runtime,
					    SNDRV_PCM_HW_PARAM_PERIODS);
	if (ret < 0)
		pr_err("snd_pcm_hw_constraint_integer failed\n");

	return 0;
}
开发者ID:Rondeau7，项目名称:android_kernel_lge_msm8960，代码行数:59，代码来源:msm-pcm-afe.c


示例13: mtk_pcm_dl1_open

static int mtk_pcm_dl1_open(struct snd_pcm_substream *substream)
{
    int ret = 0;
    struct snd_pcm_runtime *runtime = substream->runtime;
    PRINTK_AUDDRV("mtk_pcm_dl1_open\n");

    AfeControlSramLock();
    if (GetSramState() == SRAM_STATE_FREE)
    {
        mtk_pcm_dl1_hardware.buffer_bytes_max = GetPLaybackSramFullSize();
        mPlaybackSramState = SRAM_STATE_PLAYBACKFULL;
        SetSramState(mPlaybackSramState);
    }
    else
    {
        mtk_pcm_dl1_hardware.buffer_bytes_max = GetPLaybackDramSize();
        mPlaybackSramState = SRAM_STATE_PLAYBACKDRAM;
    }
    AfeControlSramUnLock();
    if (mPlaybackSramState == SRAM_STATE_PLAYBACKDRAM)
    {
        AudDrv_Emi_Clk_On();
    }

    printk("mtk_pcm_dl1_hardware.buffer_bytes_max = %zu mPlaybackSramState = %d\n", mtk_pcm_dl1_hardware.buffer_bytes_max, mPlaybackSramState);
    runtime->hw = mtk_pcm_dl1_hardware;

    AudDrv_ANA_Clk_On();
    AudDrv_Clk_On();
    memcpy((void *)(&(runtime->hw)), (void *)&mtk_pcm_dl1_hardware , sizeof(struct snd_pcm_hardware));
    pMemControl = Get_Mem_ControlT(Soc_Aud_Digital_Block_MEM_DL1);

    ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
                                     &constraints_sample_rates);

    if (ret < 0)
    {
        printk("snd_pcm_hw_constraint_integer failed\n");
    }

    if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
    {
        printk("SNDRV_PCM_STREAM_PLAYBACK mtkalsa_dl1playback_constraints\n");
    }
    else
    {
        printk("SNDRV_PCM_STREAM_CAPTURE mtkalsa_dl1playback_constraints\n");
    }

    if (ret < 0)
    {
        printk("ret < 0 mtk_soc_pcm_dl1_close\n");
        mtk_soc_pcm_dl1_close(substream);
        return ret;
    }

    //PRINTK_AUDDRV("mtk_pcm_dl1_open return\n");
    return 0;
}
开发者ID:rock12，项目名称:ALPS.L1.MP6.V2.19_CENON6580_WE_1_L_KERNEL，代码行数:59，代码来源:mt_soc_pcm_dl1.c


示例14: snd_rpi_proto_startup

static int snd_rpi_proto_startup(struct snd_pcm_substream *substream)
{
	/* Setup constraints, because there is a 12.288 MHz XTAL on the board */
	snd_pcm_hw_constraint_list(substream->runtime, 0,
				SNDRV_PCM_HW_PARAM_RATE,
				&wm8731_constraints_12288000);
	return 0;
}
开发者ID:EvanHa，项目名称:rbp，代码行数:8，代码来源:rpi-proto.c


示例15: ctp_startup_fm_xsp

int ctp_startup_fm_xsp(struct snd_pcm_substream *substream)
{
	pr_debug("%s - applying rate constraint\n", __func__);
	snd_pcm_hw_constraint_list(substream->runtime, 0,
				SNDRV_PCM_HW_PARAM_RATE,
				&constraints_48000);
	return 0;
}
开发者ID:DanBjorklund，项目名称:ME302C，代码行数:8，代码来源:ctp_rhb_cs42l73.c


示例16: rx1950_startup

static int rx1950_startup(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;

	return snd_pcm_hw_constraint_list(runtime, 0,
					SNDRV_PCM_HW_PARAM_RATE,
					&hw_rates);
}
开发者ID:383530895，项目名称:linux，代码行数:8，代码来源:rx1950_uda1380.c


示例17: cs53l30_pcm_startup

static int cs53l30_pcm_startup(struct snd_pcm_substream *substream,
			       struct snd_soc_dai *dai)
{
	snd_pcm_hw_constraint_list(substream->runtime, 0,
				   SNDRV_PCM_HW_PARAM_RATE, &src_constraints);

	return 0;
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:8，代码来源:cs53l30.c


示例18: multimedia_startup

static int multimedia_startup(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
{
	snd_pcm_hw_constraint_list(substream->runtime, 0,
		SNDRV_PCM_HW_PARAM_RATE,
		&constraints_sample_rates);
	return 0;
}
开发者ID:AudioGod，项目名称:Gods_kernel_yu_msm8916，代码行数:8，代码来源:msm-dai-fe.c


示例19: cs42l73_pcm_startup

static int cs42l73_pcm_startup(struct snd_pcm_substream *substream,
			       struct snd_soc_dai *dai)
{
	snd_pcm_hw_constraint_list(substream->runtime, 0,
					SNDRV_PCM_HW_PARAM_RATE,
					&constraints_12_24);
	return 0;
}
开发者ID:FrozenCow，项目名称:FIRE-ICE，代码行数:8，代码来源:cs42l73.c


示例20: msm_compr_open

static int msm_compr_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;
	struct compr_audio *compr;
	struct msm_audio *prtd;
	int ret = 0;

	/* Capture path */
	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
		return -EINVAL;

	pr_debug("%s\n", __func__);
	compr = kzalloc(sizeof(struct compr_audio), GFP_KERNEL);
	if (compr == NULL) {
		pr_err("Failed to allocate memory for msm_audio\n");
		return -ENOMEM;
	}
	prtd = &compr->prtd;
	prtd->substream = substream;
	prtd->audio_client = q6asm_audio_client_alloc(
				(app_cb)compr_event_handler, compr);
	if (!prtd->audio_client) {
		pr_info("%s: Could not allocate memory\n", __func__);
		kfree(prtd);
		return -ENOMEM;
	}
	prtd->audio_client->perf_mode = false;
	runtime->hw = msm_compr_hardware_playback;

	pr_info("%s: session ID %d\n", __func__, prtd->audio_client->session);

	prtd->session_id = prtd->audio_client->session;
	msm_pcm_routing_reg_phy_stream(soc_prtd->dai_link->be_id,
			prtd->audio_client->perf_mode,
			prtd->session_id, substream->stream);

	prtd->cmd_ack = 1;

	ret = snd_pcm_hw_constraint_list(runtime, 0,
			SNDRV_PCM_HW_PARAM_RATE,
			&constraints_sample_rates);
	if (ret < 0)
		pr_info("snd_pcm_hw_constraint_list failed\n");
	/* Ensure that buffer size is a multiple of period size */
	ret = snd_pcm_hw_constraint_integer(runtime,
			    SNDRV_PCM_HW_PARAM_PERIODS);
	if (ret < 0)
		pr_info("snd_pcm_hw_constraint_integer failed\n");

	prtd->dsp_cnt = 0;
	atomic_set(&prtd->pending_buffer, 1);
	compr->codec = FORMAT_MP3;
	populate_codec_list(compr, runtime);
	runtime->private_data = compr;

	return 0;
}
开发者ID:SonsOfAndroid，项目名称:android_kernel_samsung_d2_SOA，代码行数:58，代码来源:msm-compr-q6.c



注：本文中的snd_pcm_hw_constraint_list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。

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