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nuttx/drivers/audio/cxd56.h
Tobias Johansson c06c6ffa81 cxd56: add initial audio SRC implementation 
Add basic sample rate conversion to the CXD56 Spresense audio
driver using libsamplerate. Currently conversion is only done
during playback and all output is fixed at 48 kHz.

Issues:
- 16 kHz SRC has glitches (unless data dump is enabled)
- 44.1 kHz SRC gets stuck
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
2020-11-19 07:29:07 +09:00

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/****************************************************************************
* drivers/audio/cxd56.h
*
* Copyright 2019 Sony Semiconductor Solutions Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __DRIVERS_AUDIO_CXD56_H
#define __DRIVERS_AUDIO_CXD56_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <pthread.h>
#include <mqueue.h>
#include <nuttx/audio/audio.h>
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <nuttx/fs/ioctl.h>
#ifdef CONFIG_AUDIO
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef CONFIG_CXD56_AUDIO_WORKER_STACKSIZE
# define CONFIG_CXD56_AUDIO_WORKER_STACKSIZE 768
#endif
#ifndef CONFIG_CXD56_MSG_PRIO
# define CONFIG_CXD56_MSG_PRIO 1
#endif
#ifdef CONFIG_CXD56_AUDIO_I2S_DEVICE_1_MASTER
# define CXD56_I2S1_MODE 0 /* Master */
#else
# define CXD56_I2S1_MODE 1 /* Slave */
#endif
#ifdef CONFIG_CXD56_AUDIO_I2S_FORMAT_1_LEFT
# define CXD56_I2S1_FORMAT 1 /* Left */
#else
# define CXD56_I2S1_FORMAT 0 /* Normal */
#endif
#ifdef CONFIG_CXD56_AUDIO_I2S_BYPASS_MODE_1_ENABLE
# define CXD56_I2S1_BYPASS 0 /* Disable */
#else
# define CXD56_I2S1_BYPASS 1 /* Enable */
#endif
/* I2S data rate of I2S1 */
#if defined(CONFIG_CXD56_I2S0)
# define CXD56_I2S1_DATA_RATE CONFIG_CXD56_AUDIO_I2S_RATE_1
#else
# define CXD56_I2S1_DATA_RATE 0
#endif
#define CXD56_XTAL_24_576MHZ 0
#define CXD56_XTAL_49_152MHZ 1
#ifdef CONFIG_CXD56_AUDIO_XTAL_SEL_49_152MHZ
# define CXD56_AUDIO_MCLK CXD56_XTAL_49_152MHZ
#else
# define CXD56_AUDIO_MCLK CXD56_XTAL_24_576MHZ
#endif
/* Drive strength levels */
#define CXD56_DS_WEAKEST 1
#define CXD56_DS_WEAKER 2
#define CXD56_DS_STRONGER 3
#define CXD56_DS_STRONGEST 4
/* Drive strength of global pin output-A */
#if defined(CONFIG_CXD56_AUDIO_GPO_A_WEAKEST)
# define CXD56_GPO_A_DS CXD56_DS_WEAKEST
#elif defined(CONFIG_CXD56_AUDIO_GPO_A_WEAKER)
# define CXD56_GPO_A_DS CXD56_DS_WEAKER
#elif defined(CONFIG_CXD56_AUDIO_GPO_A_STRONGER)
# define CXD56_GPO_A_DS CXD56_DS_STRONGER
#else
# define CXD56_GPO_A_DS CXD56_DS_STRONGEST
#endif
/* Drive strength of D/A converted data */
#if defined(CONFIG_CXD56_AUDIO_DA_DATA_WEAKEST)
# define CXD56_DA_DS CXD56_DS_WEAKEST
#elif defined(CONFIG_CXD56_AUDIO_DA_DATA_WEAKER)
# define CXD56_DA_DS CXD56_DS_WEAKER
#elif defined(CONFIG_CXD56_AUDIO_DA_DATA_STRONGER)
# define CXD56_DA_DS CXD56_DS_STRONGER
#else
# define CXD56_DA_DS CXD56_DS_STRONGEST
#endif
/* Drive strength of digital mic clock */
#if defined(CONFIG_CXD56_AUDIO_CLKOUT_DMIC_WEAKEST)
# define CXD56_DMIC_CLK_DS CXD56_DS_WEAKEST
#elif defined(CONFIG_CXD56_AUDIO_CLKOUT_DMIC_WEAKER)
# define CXD56_DMIC_CLK_DS CXD56_DS_WEAKER
#elif defined(CONFIG_CXD56_AUDIO_CLKOUT_DMIC_STRONGER)
# define CXD56_DMIC_CLK_DS CXD56_DS_STRONGER
#else
# define CXD56_DMIC_CLK_DS CXD56_DS_STRONGEST
#endif
/* Drive strength of master clock */
#if defined(CONFIG_CXD56_AUDIO_MCLKOUT_WEAKEST)
# define CXD56_MCLKOUT_DS CXD56_DS_WEAKEST
#elif defined(CONFIG_CXD56_AUDIO_MCLKOUT_WEAKER)
# define CXD56_MCLKOUT_DS CXD56_DS_WEAKER
#elif defined(CONFIG_CXD56_AUDIO_MCLKOUT_STRONGER)
# define CXD56_MCLKOUT_DS CXD56_DS_STRONGER
#else
# define CXD56_MCLKOUT_DS CXD56_DS_STRONGEST
#endif
/* Speaker time split on drive */
#if defined(CONFIG_CXD56_AUDIO_SP_SPLIT_LONGEST)
# define CXD56_SP_SPLIT_ON 4
#elif defined(CONFIG_CXD56_AUDIO_SP_SPLIT_LONG)
# define CXD56_SP_SPLIT_ON 3
#elif defined(CONFIG_CXD56_AUDIO_SP_SPLIT_SHORT)
# define CXD56_SP_SPLIT_ON 2
#else
# define CXD56_SP_SPLIT_ON 1
#endif
/* Speaker drive mode */
#if defined(CONFIG_CXD56_AUDIO_SP_DRV_LINEOUT)
# define CXD56_SP_DRIVER 0
#elif defined(CONFIG_CXD56_AUDIO_SP_DRV_1DRIVERT)
# define CXD56_SP_DRIVER 1
#elif defined(CONFIG_CXD56_AUDIO_SP_DRV_2DRIVERT)
# define CXD56_SP_DRIVER 2
#else
# define CXD56_SP_DRIVER 3
#endif
/* Mic bias voltage select */
#define CXD56_MIC_BIAS_20V 1
#define CXD56_MIC_BIAS_28V 2
#if defined(CONFIG_CXD56_AUDIO_MICBIAS_20V)
# define CXD56_MIC_BIAS CXD56_MIC_BIAS_20V
#else
# define CXD56_MIC_BIAS CXD56_MIC_BIAS_28V
#endif
/* Mic select */
#define CXD56_AUDIO_CFG_MIC CONFIG_CXD56_AUDIO_MIC_CHANNEL_SEL
/* Mic boot wait time */
#if defined(CONFIG_CXD56_AUDIO_MIC_BOOT_WAIT)
#define CXD56_MIC_BOOT_WAIT CONFIG_CXD56_AUDIO_MIC_BOOT_WAIT
#else
#define CXD56_MIC_BOOT_WAIT 1100
#endif
/* CIC filter input path */
#define CXD56_AUDIO_CFG_CIC_IN_SEL_NONE 0
#define CXD56_AUDIO_CFG_CIC_IN_SEL_CXD 1
#define CXD56_AUDIO_CFG_CIC_IN_SEL_DMICIF 2
#if defined(CONFIG_CXD56_AUDIO_CIC_IN_SEL_CXD)
# define CXD56_AUDIO_CFG_CIC_IN CXD56_AUDIO_CFG_CIC_IN_SEL_CXD
#elif defined (CONFIG_CXD56_AUDIO_CIC_IN_SEL_DMIC)
# define CXD56_AUDIO_CFG_CIC_IN CXD56_AUDIO_CFG_CIC_IN_SEL_DMICIF
#else
# define CXD56_AUDIO_CFG_CIC_IN CXD56_AUDIO_CFG_CIC_IN_SEL_NONE
#endif
/* DMA format */
#define CXD56_DMA_FORMAT_LR 0
#define CXD56_DMA_FORMAT_RL 1
#if defined(CONFIG_CXD56_AUDIO_DMA_DATA_FORMAT_LR)
# define CXD56_DMA_FORMAT CXD56_DMA_FORMAT_LR
#else
# define CXD56_DMA_FORMAT CXD56_DMA_FORMAT_RL
#endif
/* Audio buffer configuration */
#ifndef CONFIG_CXD56_AUDIO_BUFFER_SIZE
# define CONFIG_CXD56_AUDIO_BUFFER_SIZE 4096
#endif
#ifndef CONFIG_CXD56_AUDIO_NUM_BUFFERS
# define CONFIG_CXD56_AUDIO_NUM_BUFFERS 4
#endif
/* Queue helpers */
#define dq_get(q) (dq_remfirst(q))
#define dq_put(q,n) (dq_addlast((dq_entry_t*)n,(q)))
#define dq_put_back(q,n) (dq_addfirst((dq_entry_t*)n,(q)))
#define dq_clear(q) \
do \
{ \
dq_remlast(q); \
} \
while (!dq_empty(q))
/****************************************************************************
* Public Types
****************************************************************************/
enum cxd56_dmahandle_e
{
CXD56_AUDIO_DMA_MIC,
CXD56_AUDIO_DMA_I2S0_DOWN,
CXD56_AUDIO_DMA_COUNT
};
typedef enum cxd56_dmahandle_e cxd56_dmahandle_t;
enum cxd56_devstate_e
{
CXD56_DEV_STATE_OFF,
CXD56_DEV_STATE_PAUSED,
CXD56_DEV_STATE_BUFFERING,
CXD56_DEV_STATE_STARTED,
CXD56_DEV_STATE_STOPPED
};
struct cxd56_dev_s
{
/* We are an audio lower half driver (We are also the upper "half" of
* the CS43L22 driver with respect to the board lower half driver).
*
* Terminology:
* Our "lower" half audio instances will be called dev for the publicly
* visible version and "priv" for the version that only this driver
* knows. From the point of view of this driver, it is the board lower
* "half" that is referred to as "lower".
*/
struct audio_lowerhalf_s dev; /* CXD56 audio lower half (this device) */
/* Our specific driver data goes here */
const FAR struct cxd56_lower_s *lower; /* Pointer to the board lower functions */
enum cxd56_devstate_e state; /* Driver state */
enum cxd56_dmahandle_e dma_handle; /* DMA handle */
mqd_t mq; /* Message queue for receiving messages */
char mqname[16]; /* Our message queue name */
pthread_t threadid; /* ID of our thread */
sem_t pendsem; /* Protect pendq */
struct dq_queue_s up_pendq; /* Pending buffers from app to process */
struct dq_queue_s up_runq; /* Buffers from app being played */
#ifdef CONFIG_AUDIO_CXD56_SRC
struct dq_queue_s down_pendq; /* Pending SRC buffers to be DMA'd */
struct dq_queue_s down_runq; /* SRC buffers being processed */
struct dq_queue_s down_doneq; /* Done SRC buffers to be re-used */
#endif
uint16_t samplerate; /* Sample rate */
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
int16_t volume; /* Output volume {0..63} */
#endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
uint8_t channels; /* Number of channels (1..8) */
uint16_t mic_gain; /* Mic gain */
uint64_t mic_boot_start; /* Mic startup wait time */
uint8_t bitwidth; /* Bits per sample (16 or 24) */
bool muted; /* True: Output is muted */
bool running; /* True: Worker thread is running */
bool paused; /* True: Playing is paused */
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
bool terminating; /* True: Stop requested */
#endif
bool reserved; /* True: Device is reserved */
volatile int result; /* The result of the last transfer */
};
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#endif /* CONFIG_AUDIO */
#endif /* __DRIVERS_AUDIO_CXD56_H */
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