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nuttx/drivers/audio/audio_i2s.c
Manish Kumar Sharma 6a1abbcf56 driver/audio: remove unnecessary switch in switch 
- There is unnecessary switch inside switch which is making code not too readable

Signed-off-by: Manish Kumar Sharma <manishsharma3134@gmail.com>
2023-07-16 16:40:34 +08:00

442 lines
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/****************************************************************************
* drivers/audio/audio_i2s.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <assert.h>
#include <debug.h>
#include <nuttx/audio/audio.h>
#include <nuttx/audio/i2s.h>
#include <nuttx/kmalloc.h>
/****************************************************************************
* Private Types
****************************************************************************/
struct audio_i2s_s
{
struct audio_lowerhalf_s dev;
struct i2s_dev_s *i2s;
bool playback;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int audio_i2s_getcaps(FAR struct audio_lowerhalf_s *dev, int type,
FAR struct audio_caps_s *caps);
static int audio_i2s_shutdown(FAR struct audio_lowerhalf_s *dev);
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int audio_i2s_configure(FAR struct audio_lowerhalf_s *dev,
FAR void *session,
FAR const struct audio_caps_s *caps);
static int audio_i2s_start(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
static int audio_i2s_stop(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
static int audio_i2s_pause(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
static int audio_i2s_resume(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#endif
static int audio_i2s_reserve(FAR struct audio_lowerhalf_s *dev,
FAR void **session);
static int audio_i2s_release(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#else
static int audio_i2s_configure(FAR struct audio_lowerhalf_s *dev,
FAR const struct audio_caps_s *caps);
static int audio_i2s_start(FAR struct audio_lowerhalf_s *dev);
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
static int audio_i2s_stop(FAR struct audio_lowerhalf_s *dev);
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
static int audio_i2s_pause(FAR struct audio_lowerhalf_s *dev);
static int audio_i2s_resume(FAR struct audio_lowerhalf_s *dev);
#endif
static int audio_i2s_reserve(FAR struct audio_lowerhalf_s *dev);
static int audio_i2s_release(FAR struct audio_lowerhalf_s *dev);
#endif
static int audio_i2s_allocbuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct audio_buf_desc_s *bufdesc);
static int audio_i2s_freebuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct audio_buf_desc_s *bufdesc);
static int audio_i2s_enqueuebuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct ap_buffer_s *apb);
static int audio_i2s_ioctl(FAR struct audio_lowerhalf_s *dev, int cmd,
unsigned long arg);
static void audio_i2s_callback(struct i2s_dev_s *dev,
FAR struct ap_buffer_s *apb, FAR void *arg,
int result);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct audio_ops_s g_audio_i2s_ops =
{
audio_i2s_getcaps, /* getcaps */
audio_i2s_configure, /* configure */
audio_i2s_shutdown, /* shutdown */
audio_i2s_start, /* start */
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
audio_i2s_stop, /* stop */
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
audio_i2s_pause, /* pause */
audio_i2s_resume, /* resume */
#endif
audio_i2s_allocbuffer, /* allocbuffer */
audio_i2s_freebuffer, /* freebuffer */
audio_i2s_enqueuebuffer, /* enqueue_buffer */
NULL, /* cancel_buffer */
audio_i2s_ioctl, /* ioctl */
NULL, /* read */
NULL, /* write */
audio_i2s_reserve, /* reserve */
audio_i2s_release /* release */
};
/****************************************************************************
* Private Functions
****************************************************************************/
static int audio_i2s_getcaps(FAR struct audio_lowerhalf_s *dev, int type,
FAR struct audio_caps_s *caps)
{
FAR struct audio_i2s_s *audio_i2s = (struct audio_i2s_s *)dev;
FAR struct i2s_dev_s *i2s = audio_i2s->i2s;
/* Validate the structure */
DEBUGASSERT(caps && caps->ac_len >= sizeof(struct audio_caps_s));
audinfo("type=%d ac_type=%d\n", type, caps->ac_type);
caps->ac_format.hw = 0;
caps->ac_controls.w = 0;
switch (caps->ac_type)
{
/* Caller is querying for the types of units we support */
case AUDIO_TYPE_QUERY:
/* Provide our overall capabilities. The interfacing software
* must then call us back for specific info for each capability.
*/
if (caps->ac_subtype == AUDIO_TYPE_QUERY)
{
/* We don't decode any formats! Only something above us in
* the audio stream can perform decoding on our behalf.
*/
/* The types of audio units we implement */
if (audio_i2s->playback)
{
caps->ac_controls.b[0] = AUDIO_TYPE_OUTPUT;
}
else
{
caps->ac_controls.b[0] = AUDIO_TYPE_INPUT;
}
caps->ac_format.hw = 1 << (AUDIO_FMT_PCM - 1);
break;
}
caps->ac_controls.b[0] = AUDIO_SUBFMT_END;
break;
/* Provide capabilities of our OUTPUT unit */
case AUDIO_TYPE_OUTPUT:
case AUDIO_TYPE_INPUT:
if (caps->ac_subtype == AUDIO_TYPE_QUERY)
{
/* Report the Sample rates we support */
caps->ac_controls.hw[0] = AUDIO_SAMP_RATE_DEF_ALL;
break;
}
default:
I2S_IOCTL(i2s, AUDIOIOC_GETCAPS, (unsigned long)caps);
break;
}
return caps->ac_len;
}
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int audio_i2s_configure(FAR struct audio_lowerhalf_s *dev,
FAR void *session,
FAR const struct audio_caps_s *caps)
#else
static int audio_i2s_configure(FAR struct audio_lowerhalf_s *dev,
FAR const struct audio_caps_s *caps)
#endif
{
FAR struct audio_i2s_s *audio_i2s = (struct audio_i2s_s *)dev;
FAR struct i2s_dev_s *i2s;
int samprate;
int nchannels;
int bpsamp;
int ret = OK;
DEBUGASSERT(audio_i2s != NULL && caps != NULL);
i2s = audio_i2s->i2s;
audinfo("ac_type: %d\n", caps->ac_type);
/* Process the configure operation */
switch (caps->ac_type)
{
case AUDIO_TYPE_OUTPUT:
case AUDIO_TYPE_INPUT:
/* Save the current stream configuration */
samprate = caps->ac_controls.hw[0] |
(caps->ac_controls.b[3] << 16);
nchannels = caps->ac_channels;
bpsamp = caps->ac_controls.b[2];
if (audio_i2s->playback)
{
I2S_TXCHANNELS(i2s, nchannels);
I2S_TXDATAWIDTH(i2s, bpsamp);
I2S_TXSAMPLERATE(i2s, samprate);
}
else
{
I2S_RXCHANNELS(i2s, nchannels);
I2S_RXDATAWIDTH(i2s, bpsamp);
I2S_RXSAMPLERATE(i2s, samprate);
}
break;
default:
ret = I2S_IOCTL(i2s, AUDIOIOC_CONFIGURE, (unsigned long)caps);
break;
}
return ret;
}
static int audio_i2s_shutdown(FAR struct audio_lowerhalf_s *dev)
{
FAR struct audio_i2s_s *audio_i2s = (struct audio_i2s_s *)dev;
FAR struct i2s_dev_s *i2s = audio_i2s->i2s;
return I2S_IOCTL(i2s, AUDIOIOC_SHUTDOWN, audio_i2s->playback);
}
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int audio_i2s_start(FAR struct audio_lowerhalf_s *dev,
FAR void *session)
#else
static int audio_i2s_start(FAR struct audio_lowerhalf_s *dev)
#endif
{
FAR struct audio_i2s_s *audio_i2s = (struct audio_i2s_s *)dev;
FAR struct i2s_dev_s *i2s = audio_i2s->i2s;
return I2S_IOCTL(i2s, AUDIOIOC_START, audio_i2s->playback);
}
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int audio_i2s_stop(FAR struct audio_lowerhalf_s *dev,
FAR void *session)
#else
static int audio_i2s_stop(FAR struct audio_lowerhalf_s *dev)
#endif
{
FAR struct audio_i2s_s *audio_i2s = (struct audio_i2s_s *)dev;
FAR struct i2s_dev_s *i2s = audio_i2s->i2s;
return I2S_IOCTL(i2s, AUDIOIOC_STOP, audio_i2s->playback);
}
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int audio_i2s_pause(FAR struct audio_lowerhalf_s *dev,
FAR void *session)
#else
static int audio_i2s_pause(FAR struct audio_lowerhalf_s *dev)
#endif
{
FAR struct audio_i2s_s *audio_i2s = (struct audio_i2s_s *)dev;
FAR struct i2s_dev_s *i2s = audio_i2s->i2s;
return I2S_IOCTL(i2s, AUDIOIOC_PAUSE, audio_i2s->playback);
}
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int audio_i2s_resume(FAR struct audio_lowerhalf_s *dev,
FAR void *session)
#else
static int audio_i2s_resume(FAR struct audio_lowerhalf_s *dev)
#endif
{
FAR struct audio_i2s_s *audio_i2s = (struct audio_i2s_s *)dev;
FAR struct i2s_dev_s *i2s = audio_i2s->i2s;
return I2S_IOCTL(i2s, AUDIOIOC_RESUME, audio_i2s->playback);
}
#endif
static int audio_i2s_allocbuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct audio_buf_desc_s *bufdesc)
{
FAR struct audio_i2s_s *audio_i2s = (struct audio_i2s_s *)dev;
FAR struct i2s_dev_s *i2s = audio_i2s->i2s;
return I2S_IOCTL(i2s, AUDIOIOC_ALLOCBUFFER, (unsigned long)bufdesc);
}
static int audio_i2s_freebuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct audio_buf_desc_s *bufdesc)
{
FAR struct audio_i2s_s *audio_i2s = (struct audio_i2s_s *)dev;
FAR struct i2s_dev_s *i2s = audio_i2s->i2s;
return I2S_IOCTL(i2s, AUDIOIOC_FREEBUFFER, (unsigned long)bufdesc);
}
static int audio_i2s_enqueuebuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct ap_buffer_s *apb)
{
FAR struct audio_i2s_s *audio_i2s = (struct audio_i2s_s *)dev;
FAR struct i2s_dev_s *i2s = audio_i2s->i2s;
if (audio_i2s->playback)
{
return I2S_SEND(i2s, apb, audio_i2s_callback, audio_i2s, 0);
}
else
{
return I2S_RECEIVE(i2s, apb, audio_i2s_callback, audio_i2s, 0);
}
}
static int audio_i2s_ioctl(FAR struct audio_lowerhalf_s *dev, int cmd,
unsigned long arg)
{
FAR struct audio_i2s_s *audio_i2s = (struct audio_i2s_s *)dev;
FAR struct i2s_dev_s *i2s = audio_i2s->i2s;
return I2S_IOCTL(i2s, cmd, arg);
}
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int audio_i2s_reserve(FAR struct audio_lowerhalf_s *dev,
FAR void **session)
#else
static int audio_i2s_reserve(FAR struct audio_lowerhalf_s *dev)
#endif
{
#ifdef CONFIG_AUDIO_MULTI_SESSION
*session = (void *)audio_i2s->playback;
#endif
return OK;
}
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int audio_i2s_release(FAR struct audio_lowerhalf_s *dev,
FAR void *session)
#else
static int audio_i2s_release(FAR struct audio_lowerhalf_s *dev)
#endif
{
return OK;
}
static void audio_i2s_callback(struct i2s_dev_s *dev,
FAR struct ap_buffer_s *apb,
FAR void *arg, int result)
{
FAR struct audio_i2s_s *audio_i2s = arg;
bool final = false;
if ((apb->flags & AUDIO_APB_FINAL) != 0)
{
final = true;
}
#ifdef CONFIG_AUDIO_MULTI_SESSION
audio_i2s->dev.upper(audio_i2s->dev.priv, AUDIO_CALLBACK_DEQUEUE, apb,
OK, NULL);
#else
audio_i2s->dev.upper(audio_i2s->dev.priv, AUDIO_CALLBACK_DEQUEUE, apb,
OK);
#endif
if (final)
{
#ifdef CONFIG_AUDIO_MULTI_SESSION
audio_i2s->dev.upper(audio_i2s->dev.priv, AUDIO_CALLBACK_COMPLETE,
NULL, OK, NULL);
#else
audio_i2s->dev.upper(audio_i2s->dev.priv, AUDIO_CALLBACK_COMPLETE,
NULL, OK);
#endif
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
FAR struct audio_lowerhalf_s *audio_i2s_initialize(FAR struct i2s_dev_s *i2s,
bool playback)
{
FAR struct audio_i2s_s *audio_i2s;
if (i2s == NULL)
{
return NULL;
}
audio_i2s = kmm_zalloc(sizeof(struct audio_i2s_s));
if (audio_i2s == NULL)
{
return NULL;
}
audio_i2s->playback = playback;
audio_i2s->i2s = i2s;
audio_i2s->dev.ops = &g_audio_i2s_ops;
return &audio_i2s->dev;
}
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