78 lines
1.6 KiB
C
Executable file
78 lines
1.6 KiB
C
Executable file
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2019 MediaTek Inc.
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* Author: Michael Hsiao <michael.hsiao@mediatek.com>
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*/
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/******************************************************************************
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*
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*
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* Filename:
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* ---------
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* mtk-soc-pcm-common
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*
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* Project:
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* --------
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* mtk-soc-pcm-common function
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*
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*
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* Description:
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* ------------
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* common function
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*
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* Author:
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* -------
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* Chipeng Chang (MTK02308)
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*
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*---------------------------------------------------------------------------
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---
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*
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****************************************************************************/
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#include "mtk-soc-pcm-common.h"
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unsigned long audio_frame_to_bytes(struct snd_pcm_substream *substream,
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unsigned long count)
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{
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unsigned long bytes = count;
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struct snd_pcm_runtime *runtime = substream->runtime;
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if (runtime->format == SNDRV_PCM_FORMAT_S32_LE ||
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runtime->format == SNDRV_PCM_FORMAT_U32_LE)
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bytes = bytes << 2;
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else
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bytes = bytes << 1;
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if (runtime->channels == 2)
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bytes = bytes << 1;
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else if (runtime->channels == 4)
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bytes = bytes << 2;
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else if (runtime->channels != 1)
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bytes = bytes << 3;
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return bytes;
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}
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unsigned long audio_bytes_to_frame(struct snd_pcm_substream *substream,
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unsigned long bytes)
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{
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unsigned long count = bytes;
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struct snd_pcm_runtime *runtime = substream->runtime;
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if (runtime->format == SNDRV_PCM_FORMAT_S32_LE ||
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runtime->format == SNDRV_PCM_FORMAT_U32_LE)
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count = count >> 2;
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else
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count = count >> 1;
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if (runtime->channels == 2)
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count = count >> 1;
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else if (runtime->channels == 4)
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count = count >> 2;
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else if (runtime->channels != 1)
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count = count >> 3;
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return count;
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}
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