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RetroArch/audio/microphone_driver.c
libretroadmin 38f278519c Remove some header includes
2024-06-16 21:37:46 +02:00

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2023 Jesse Talavera-Greenberg
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <math.h>
#include <memalign.h>
#include <audio/conversion/s16_to_float.h>
#include <audio/conversion/float_to_s16.h>
#include <retro_assert.h>
#include <string/stdstring.h>
#include <lists/string_list.h>
#include <audio/conversion/dual_mono.h>
#include "microphone_driver.h"
#include "audio_defines.h"
#include "../configuration.h"
#include "../driver.h"
#include "../list_special.h"
#include "../runloop.h"
#include "../verbosity.h"
static microphone_driver_state_t mic_driver_st;
microphone_driver_t microphone_null = {
NULL,
NULL,
NULL,
NULL,
"null",
NULL,
NULL,
NULL,
NULL
};
microphone_driver_t *microphone_drivers[] = {
#ifdef HAVE_ALSA
&microphone_alsa,
#if !defined(__QNX__) && !defined(MIYOO) && defined(HAVE_THREADS)
&microphone_alsathread,
#endif
#endif
#ifdef HAVE_WASAPI
&microphone_wasapi,
#endif
#ifdef HAVE_SDL2
&microphone_sdl, /* Microphones are not supported in SDL 1 */
#endif
&microphone_null,
NULL,
};
microphone_driver_state_t *microphone_state_get_ptr(void)
{
return &mic_driver_st;
}
#define mic_driver_get_sample_size(microphone) \
(((microphone)->flags & MICROPHONE_FLAG_USE_FLOAT) ? sizeof(float) : sizeof(int16_t))
static bool mic_driver_open_mic_internal(retro_microphone_t* microphone);
bool microphone_driver_start(void)
{
microphone_driver_state_t *mic_st = &mic_driver_st;
retro_microphone_t *microphone = &mic_st->microphone;
if (microphone->flags & MICROPHONE_FLAG_ACTIVE)
{ /* If there's an opened microphone that the core turned on... */
if (microphone->flags & MICROPHONE_FLAG_PENDING)
{ /* If this microphone was requested before the driver was ready...*/
retro_assert(microphone->microphone_context == NULL);
/* The microphone context shouldn't have been created yet */
/* Now that the driver and driver context are ready, let's initialize the mic */
if (mic_driver_open_mic_internal(microphone))
{
/* open_mic_internal will start the microphone if it's enabled */
RARCH_DBG("[Microphone]: Initialized a previously-pending microphone.\n");
}
else
{
RARCH_ERR("[Microphone]: Failed to initialize a previously pending microphone; microphone will not be used.\n");
microphone_driver_close_mic(microphone);
/* Not returning false because a mic failure shouldn't take down the driver;
* what if the player just unplugged their mic? */
}
}
else
{ /* The mic was already created, so let's just unpause it */
microphone_driver_set_mic_state(microphone, true);
RARCH_DBG("[Microphone]: Started a microphone that was enabled when the driver was last stopped.\n");
}
}
return true;
}
bool microphone_driver_stop(void)
{
microphone_driver_state_t *mic_st = &mic_driver_st;
retro_microphone_t *microphone = &mic_st->microphone;
bool result = true;
if ((microphone->flags & MICROPHONE_FLAG_ACTIVE)
&& (microphone->flags & MICROPHONE_FLAG_ENABLED)
&& !(microphone->flags & MICROPHONE_FLAG_PENDING))
{ /* If there's an opened microphone that the core turned on and received... */
result = mic_st->driver->stop_mic(mic_st->driver_context, microphone->microphone_context);
}
/* If the mic is pending, then we don't need to do anything. */
return result;
}
/**
* config_get_microphone_driver_options:
*
* Get an enumerated list of all microphone driver names, separated by '|'.
*
* Returns: string listing of all microphone driver names, separated by '|'.
**/
const char *config_get_microphone_driver_options(void)
{
return char_list_new_special(STRING_LIST_MICROPHONE_DRIVERS, NULL);
}
bool microphone_driver_find_driver(
void *settings_data,
const char *prefix,
bool verbosity_enabled)
{
settings_t *settings = (settings_t*)settings_data;
int i = (int)driver_find_index(
"microphone_driver",
settings->arrays.microphone_driver);
if (i >= 0)
mic_driver_st.driver = (const microphone_driver_t *)
microphone_drivers[i];
else
{
const microphone_driver_t *tmp = NULL;
if (verbosity_enabled)
{
unsigned d;
RARCH_ERR("Couldn't find any %s named \"%s\".\n", prefix,
settings->arrays.microphone_driver);
RARCH_LOG_OUTPUT("Available %ss are:\n", prefix);
for (d = 0; microphone_drivers[d]; d++)
{
if (microphone_drivers[d])
RARCH_LOG_OUTPUT("\t%s\n", microphone_drivers[d]->ident);
}
RARCH_WARN("Going to default to first %s..\n", prefix);
}
tmp = (const microphone_driver_t *)microphone_drivers[0];
if (!tmp)
return false;
mic_driver_st.driver = tmp;
}
return true;
}
static void mic_driver_microphone_handle_init(retro_microphone_t *microphone, const retro_microphone_params_t *params)
{
if (microphone)
{
const settings_t *settings = config_get_ptr();
microphone->microphone_context = NULL;
microphone->flags = MICROPHONE_FLAG_ACTIVE;
microphone->sample_buffer = NULL;
microphone->sample_buffer_length = 0;
microphone->requested_params.rate = params ? params->rate : settings->uints.microphone_sample_rate;
microphone->actual_params.rate = 0;
/* We don't set the actual parameters until we actually open the mic.
* (Remember, the core can request one before the driver is ready.) */
microphone->effective_params.rate = params ? params->rate : settings->uints.microphone_sample_rate;
/* We set the effective parameters because
* the frontend has to do what it can
* to give the core what it asks for. */
}
}
static void mic_driver_microphone_handle_free(retro_microphone_t *microphone, bool is_reset)
{
microphone_driver_state_t *mic_st = &mic_driver_st;
const microphone_driver_t *mic_driver = mic_st->driver;
void *driver_context = mic_st->driver_context;
if (!microphone)
return;
if (!driver_context)
RARCH_WARN("[Microphone]: Attempted to free a microphone without an active driver context.\n");
if (microphone->microphone_context)
{
mic_driver->close_mic(driver_context, microphone->microphone_context);
microphone->microphone_context = NULL;
}
if (microphone->sample_buffer)
{
memalign_free(microphone->sample_buffer);
microphone->sample_buffer = NULL;
microphone->sample_buffer_length = 0;
}
if (microphone->outgoing_samples)
{
fifo_free(microphone->outgoing_samples);
microphone->outgoing_samples = NULL;
}
if (microphone->resampler && microphone->resampler->free && microphone->resampler_data)
microphone->resampler->free(microphone->resampler_data);
microphone->resampler = NULL;
microphone->resampler_data = NULL;
/* If the mic driver is being reset and the microphone was already valid... */
if ((microphone->flags & MICROPHONE_FLAG_ACTIVE) && is_reset)
microphone->flags |= MICROPHONE_FLAG_PENDING;
/* ...then we need to keep the handle itself valid
* so it can be reinitialized.
* Otherwise the core will lose mic input. */
else
memset(microphone, 0, sizeof(*microphone));
/* Do NOT free the microphone handle itself! It's allocated statically! */
}
static enum resampler_quality microphone_driver_get_resampler_quality(
settings_t *settings)
{
if (settings)
return (enum resampler_quality)settings->uints.microphone_resampler_quality;
return RESAMPLER_QUALITY_DONTCARE;
}
bool microphone_driver_init_internal(void *settings_data)
{
settings_t *settings = (settings_t*)settings_data;
microphone_driver_state_t *mic_st = &mic_driver_st;
bool verbosity_enabled = verbosity_is_enabled();
size_t max_frames = AUDIO_CHUNK_SIZE_NONBLOCKING * AUDIO_MAX_RATIO;
/* If the user has mic support turned off... */
if (!settings->bools.microphone_enable)
{
mic_st->flags &= ~MICROPHONE_DRIVER_FLAG_ACTIVE;
return false;
}
convert_s16_to_float_init_simd();
convert_float_to_s16_init_simd();
if (!(microphone_driver_find_driver(settings,
"microphone driver", verbosity_enabled)))
{
RARCH_ERR("[Microphone]: Failed to initialize microphone driver. Will continue without mic input.\n");
goto error;
}
mic_st->input_frames_length = max_frames * sizeof(float);
mic_st->input_frames = (float*)memalign_alloc(64, mic_st->input_frames_length);
if (!mic_st->input_frames)
goto error;
mic_st->converted_input_frames_length = max_frames * sizeof(float);
mic_st->converted_input_frames = (float*)memalign_alloc(64, mic_st->converted_input_frames_length);
if (!mic_st->converted_input_frames)
goto error;
/* Need room for dual-mono frames */
mic_st->dual_mono_frames_length = max_frames * sizeof(float) * 2;
mic_st->dual_mono_frames = (float*)memalign_alloc(64, mic_st->dual_mono_frames_length);
if (!mic_st->dual_mono_frames)
goto error;
mic_st->resampled_frames_length = max_frames * sizeof(float) * 2;
mic_st->resampled_frames = (float*) memalign_alloc(64, mic_st->resampled_frames_length);
if (!mic_st->resampled_frames)
goto error;
mic_st->resampled_mono_frames_length = max_frames * sizeof(float);
mic_st->resampled_mono_frames = (float*) memalign_alloc(64, mic_st->resampled_mono_frames_length);
if (!mic_st->resampled_mono_frames)
goto error;
mic_st->final_frames_length = max_frames * sizeof(int16_t);
mic_st->final_frames = (int16_t*) memalign_alloc(64, mic_st->final_frames_length);
if (!mic_st->final_frames)
goto error;
if (!mic_st->driver || !mic_st->driver->init)
goto error;
if (!(mic_st->driver_context = mic_st->driver->init()))
goto error;
if (!string_is_empty(settings->arrays.microphone_resampler))
strlcpy(mic_st->resampler_ident,
settings->arrays.microphone_resampler,
sizeof(mic_st->resampler_ident));
else
mic_st->resampler_ident[0] = '\0';
mic_st->resampler_quality = microphone_driver_get_resampler_quality(settings);
RARCH_LOG("[Microphone]: Initialized microphone driver.\n");
/* The mic driver was initialized, now we're ready to open mics */
mic_st->flags |= MICROPHONE_DRIVER_FLAG_ACTIVE;
if (!microphone_driver_start())
goto error;
return true;
error:
RARCH_ERR("[Microphone]: Failed to start microphone driver. Will continue without audio input.\n");
mic_st->flags &= ~MICROPHONE_DRIVER_FLAG_ACTIVE;
return microphone_driver_deinit(false);
}
/**
*
* @param microphone Handle to the microphone to init with a context
*/
static bool mic_driver_open_mic_internal(retro_microphone_t* microphone)
{
microphone_driver_state_t *mic_st = &mic_driver_st;
settings_t *settings = config_get_ptr();
const microphone_driver_t *mic_driver = mic_st->driver;
void *driver_context = mic_st->driver_context;
unsigned runloop_audio_latency = runloop_state_get_ptr()->audio_latency;
unsigned setting_audio_latency = settings->uints.microphone_latency;
unsigned audio_latency = MAX(runloop_audio_latency, setting_audio_latency);
size_t max_samples = AUDIO_CHUNK_SIZE_NONBLOCKING * 1 * AUDIO_MAX_RATIO;
if (!microphone || !mic_driver || !(mic_st->flags & MICROPHONE_DRIVER_FLAG_ACTIVE))
return false;
microphone->sample_buffer_length = max_samples * sizeof(int16_t);
microphone->sample_buffer =
(int16_t*)memalign_alloc(64, microphone->sample_buffer_length);
if (!microphone->sample_buffer)
goto error;
microphone->outgoing_samples = fifo_new(max_samples * sizeof(int16_t));
if (!microphone->outgoing_samples)
goto error;
microphone->microphone_context = mic_driver->open_mic(driver_context,
*settings->arrays.microphone_device ? settings->arrays.microphone_device : NULL,
microphone->requested_params.rate,
audio_latency,
&microphone->actual_params.rate);
if (!microphone->microphone_context)
goto error;
microphone_driver_set_mic_state(microphone, microphone->flags & MICROPHONE_FLAG_ENABLED);
RARCH_LOG("[Microphone]: Requested microphone sample rate of %uHz, got %uHz.\n",
microphone->requested_params.rate,
microphone->actual_params.rate
);
if ( mic_driver->mic_use_float
&& mic_driver->mic_use_float(mic_st->driver_context, microphone->microphone_context))
microphone->flags |= MICROPHONE_FLAG_USE_FLOAT;
microphone->original_ratio = (double)microphone->effective_params.rate / microphone->actual_params.rate;
if (!retro_resampler_realloc(
&microphone->resampler_data,
&microphone->resampler,
mic_st->resampler_ident,
mic_st->resampler_quality,
microphone->original_ratio))
{
RARCH_ERR("[Microphone]: Failed to initialize resampler \"%s\".\n", mic_st->resampler_ident);
goto error;
}
microphone->flags &= ~MICROPHONE_FLAG_PENDING;
RARCH_LOG("[Microphone]: Initialized microphone.\n");
return true;
error:
mic_driver_microphone_handle_free(microphone, false);
RARCH_ERR("[Microphone]: Driver attempted to initialize the microphone but failed.\n");
return false;
}
static void microphone_driver_close_mic_internal(retro_microphone_t *microphone, bool is_reset)
{
microphone_driver_state_t *mic_st = &mic_driver_st;
const microphone_driver_t *mic_driver = mic_st->driver;
void *driver_context = mic_st->driver_context;
if ( microphone
&& driver_context
&& mic_driver
&& mic_driver->close_mic)
mic_driver_microphone_handle_free(microphone, is_reset);
}
void microphone_driver_close_mic(retro_microphone_t *microphone)
{
mic_driver_microphone_handle_free(microphone, false);
}
bool microphone_driver_set_mic_state(retro_microphone_t *microphone, bool state)
{
microphone_driver_state_t *mic_st = &mic_driver_st;
const microphone_driver_t *mic_driver = mic_st->driver;
void *driver_context = mic_st->driver_context;
if (!microphone
|| !(microphone->flags & MICROPHONE_FLAG_ACTIVE)
|| !mic_driver
|| !mic_driver->start_mic
|| !mic_driver->stop_mic)
return false;
/* If the provided microphone was null or invalid, or the driver is incomplete, stop. */
/* If the driver is initialized... */
if (driver_context && microphone->microphone_context)
{
bool success;
/* If we want to enable this mic... */
if (state)
{
success = mic_driver->start_mic(driver_context, microphone->microphone_context);
/* Enable the mic. (Enabling an active mic is a successful noop.) */
if (success)
{
microphone->flags |= MICROPHONE_FLAG_ENABLED;
RARCH_LOG("[Microphone]: Enabled microphone.\n");
}
else
{
RARCH_ERR("[Microphone]: Failed to enable microphone.\n");
}
}
else
{ /* If we want to pause this mic... */
success = mic_driver->stop_mic(driver_context, microphone->microphone_context);
/* Disable the mic. (If the mic is already stopped, disabling it should still be successful.) */
if (success)
{
microphone->flags &= ~MICROPHONE_FLAG_ENABLED;
RARCH_LOG("[Microphone]: Disabled microphone.\n");
}
else
{
RARCH_ERR("[Microphone]: Failed to disable microphone.\n");
}
}
return success;
}
else
{ /* The driver's not ready yet, so we'll make a note
* of what the mic's state should be */
if (state)
microphone->flags |= MICROPHONE_FLAG_ENABLED;
else
microphone->flags &= ~MICROPHONE_FLAG_ENABLED;
RARCH_DBG("[Microphone]: Set pending state to %s.\n",
state ? "enabled" : "disabled");
return true;
/* This isn't an error */
}
}
bool microphone_driver_get_mic_state(const retro_microphone_t *microphone)
{
if (!microphone || !(microphone->flags & MICROPHONE_FLAG_ACTIVE))
return false;
return microphone->flags & MICROPHONE_FLAG_ENABLED;
}
/**
* Pull queued microphone samples from the driver
* and copy them to the provided buffer(s).
*
* Note that microphone samples are provided in mono,
* so a "sample" and a "frame" are equivalent here.
*
* @param mic_st The overall state of the audio driver.
* @param[out] frames The buffer in which the core will receive microphone samples.
* @param num_frames The size of \c frames, in samples.
*/
static size_t microphone_driver_flush(
microphone_driver_state_t *mic_st,
retro_microphone_t *microphone,
size_t num_frames)
{
struct resampler_data resampler_data;
unsigned sample_size = mic_driver_get_sample_size(microphone);
size_t bytes_to_read = MIN(mic_st->input_frames_length, num_frames * sample_size);
size_t frames_to_enqueue;
int bytes_read = mic_st->driver->read(
mic_st->driver_context,
microphone->microphone_context,
mic_st->input_frames,
bytes_to_read);
/* First, get the most recent mic data */
if (bytes_read <= 0)
return 0;
resampler_data.input_frames = bytes_read / sample_size;
/* This is in frames, not samples or bytes;
* we're up-channeling the audio to stereo,
* so this number still applies. */
resampler_data.output_frames = 0;
/* The resampler sets the value of output_frames */
resampler_data.data_in = mic_st->dual_mono_frames;
resampler_data.data_out = mic_st->resampled_frames;
/* The buffers that will be used for the resampler's input and output */
resampler_data.ratio = (double)microphone->effective_params.rate / (double)microphone->actual_params.rate;
if (fabs(resampler_data.ratio - 1.0f) < 1e-8)
{ /* If the mic's native rate is practically the same as the requested one... */
/* ...then skip the resampler, since it'll produce (more or less) identical results. */
frames_to_enqueue = MIN(FIFO_WRITE_AVAIL(microphone->outgoing_samples), resampler_data.input_frames);
/* If this mic provides floating-point samples... */
if (microphone->flags & MICROPHONE_FLAG_USE_FLOAT)
{
convert_float_to_s16(mic_st->final_frames, mic_st->input_frames, resampler_data.input_frames);
fifo_write(microphone->outgoing_samples, mic_st->final_frames, frames_to_enqueue * sizeof(int16_t));
}
else
fifo_write(microphone->outgoing_samples, mic_st->input_frames, frames_to_enqueue * sizeof(int16_t));
return resampler_data.input_frames;
}
/* Couldn't take the fast path, so let's resample the mic input */
/* First we need to format the input for the resampler. */
/* If this mic provides floating-point samples... */
if (microphone->flags & MICROPHONE_FLAG_USE_FLOAT)
/* Samples are already in floating-point, so we just need to up-channel them. */
convert_to_dual_mono_float(mic_st->dual_mono_frames, mic_st->input_frames, resampler_data.input_frames);
else
{
/* Samples are 16-bit, so we need to convert them first. */
convert_s16_to_float(mic_st->converted_input_frames, mic_st->input_frames, resampler_data.input_frames, 1.0f);
convert_to_dual_mono_float(mic_st->dual_mono_frames, mic_st->converted_input_frames, resampler_data.input_frames);
}
/* Now we resample the mic data. */
microphone->resampler->process(microphone->resampler_data, &resampler_data);
/* Next, we convert the resampled data back to mono... */
convert_to_mono_float_left(mic_st->resampled_mono_frames, mic_st->resampled_frames, resampler_data.output_frames);
/* Why the left channel? No particular reason.
* Left and right channels are the same in this case anyway. */
/* Finally, we convert the audio back to 16-bit ints, as the mic interface requires. */
convert_float_to_s16(mic_st->final_frames, mic_st->resampled_mono_frames, resampler_data.output_frames);
frames_to_enqueue = MIN(FIFO_WRITE_AVAIL(microphone->outgoing_samples), resampler_data.output_frames);
fifo_write(microphone->outgoing_samples, mic_st->final_frames, frames_to_enqueue * sizeof(int16_t));
return resampler_data.output_frames;
}
int microphone_driver_read(retro_microphone_t *microphone, int16_t* frames, size_t num_frames)
{
uint32_t runloop_flags = runloop_get_flags();
size_t frames_remaining = num_frames;
microphone_driver_state_t *mic_st = &mic_driver_st;
const microphone_driver_t *driver = mic_st->driver;
bool core_paused = (runloop_flags & RUNLOOP_FLAG_PAUSED) ? true : false;
bool is_fastforward = (runloop_flags & RUNLOOP_FLAG_FASTMOTION) ? true : false;
bool is_slowmo = (runloop_flags & RUNLOOP_FLAG_SLOWMOTION) ? true : false;
bool is_rewind = state_manager_frame_is_reversed();
bool driver_active = (mic_st->flags & MICROPHONE_DRIVER_FLAG_ACTIVE) ? true : false;
/* If the provided arguments aren't valid... */
if (!frames || !microphone)
return -1;
/* If the microphone or driver aren't active... */
if (!driver_active || !(microphone->flags & MICROPHONE_FLAG_ACTIVE))
return -1;
/* If the driver is invalid or doesn't have the functions it needs... */
if (!driver || !driver->read || !driver->mic_alive)
return -1;
/* If the core didn't actually ask for any frames... */
if (num_frames == 0)
return 0;
if ( (microphone->flags & MICROPHONE_FLAG_PENDING)
|| (microphone->flags & MICROPHONE_FLAG_SUSPENDED)
|| !(microphone->flags & MICROPHONE_FLAG_ENABLED)
|| is_fastforward
|| is_slowmo
|| is_rewind
)
{ /* If the microphone is pending, suspended, or disabled...
...or if the core is in fast-forward, slow-mo, or rewind...*/
memset(frames, 0, num_frames * sizeof(*frames));
return (int)num_frames;
/* ...then copy silence to the provided buffer. Not an error if the mic is pending,
* because the user might have requested a microphone
* before the driver could provide it. */
}
/* Why mute the mic when the core isn't running at standard speed?
* Because I couldn't think of anything useful for the mic to do.
* If you can, send a PR! */
/* If the driver or microphone's state haven't been allocated... */
if (!mic_st->driver_context || !microphone->microphone_context)
return -1;
/* If the mic isn't active like it should be at this point... */
if (!driver->mic_alive(mic_st->driver_context, microphone->microphone_context))
{
RARCH_ERR("[Microphone]: Mic frontend has the mic enabled, but the backend has it disabled.\n");
return -1;
}
/* If the core asked for more frames than we can fit... */
if (num_frames > microphone->outgoing_samples->size)
return -1;
retro_assert(mic_st->input_frames != NULL);
while (FIFO_READ_AVAIL(microphone->outgoing_samples) < num_frames * sizeof(int16_t))
{ /* Until we can give the core the frames it asked for... */
size_t frames_to_read = MIN(AUDIO_CHUNK_SIZE_NONBLOCKING, frames_remaining);
size_t frames_read = 0;
/* If the game is running and the mic driver is active... */
if (!core_paused)
frames_read = microphone_driver_flush(mic_st, microphone, frames_to_read);
/* Otherwise, advance the counters. We're not gonna get new data,
* but we still need to finish this loop */
frames_remaining -= frames_read;
} /* If the queue already has enough samples to give, the loop will be skipped */
fifo_read(microphone->outgoing_samples, frames, num_frames * sizeof(int16_t));
return (int)num_frames;
}
bool microphone_driver_get_effective_params(const retro_microphone_t *microphone, retro_microphone_params_t *params)
{
/* If the arguments are null... */
if (!microphone || !params)
return false;
/* If this isn't an opened microphone... */
if (!(microphone->flags & MICROPHONE_FLAG_ACTIVE))
return false;
*params = microphone->effective_params;
return true;
}
/* NOTE: The core may request a microphone before the driver is ready.
* A pending handle will be provided in that case, and the frontend will
* initialize the microphone when the time is right;
* do not call this function twice on the same mic. */
retro_microphone_t *microphone_driver_open_mic(const retro_microphone_params_t *params)
{
microphone_driver_state_t *mic_st = &mic_driver_st;
const settings_t *settings = config_get_ptr();
const microphone_driver_t *mic_driver = mic_st->driver;
void *driver_context = mic_st->driver_context;
if (!settings)
{
RARCH_ERR("[Microphone]: Failed to open microphone due to uninitialized config.\n");
return NULL;
}
if (!settings->bools.microphone_enable)
{ /* Not checking mic_st->flags because they might not be set yet;
* don't forget, the core can ask for a mic
* before the audio driver is ready to create one. */
RARCH_DBG("[Microphone]: Refused to open microphone because it's disabled in the settings.\n");
return NULL;
}
if (mic_driver == &microphone_null)
{
RARCH_WARN("[Microphone]: Cannot open microphone, null driver is configured.\n");
return NULL;
}
if (!mic_driver &&
(string_is_equal(settings->arrays.microphone_driver, "null")
|| string_is_empty(settings->arrays.microphone_driver)))
{ /* If the mic driver hasn't been initialized, but it's not going to be... */
RARCH_ERR("[Microphone]: Cannot open microphone as the driver won't be initialized.\n");
return NULL;
}
/* If the core has requested a second microphone... */
if (mic_st->microphone.flags & MICROPHONE_FLAG_ACTIVE)
{
RARCH_ERR("[Microphone]: Failed to open a second microphone, frontend only supports one at a time right now.\n");
if (mic_st->microphone.flags & MICROPHONE_FLAG_PENDING)
/* If that mic is pending... */
RARCH_ERR("[Microphone]: A microphone is pending initialization.\n");
else
/* That mic is initialized */
RARCH_ERR("[Microphone]: An initialized microphone exists.\n");
return NULL;
}
/* Cores might ask for a microphone before the audio driver is ready to provide them;
* if that happens, we have to initialize the microphones later.
* But the user still wants a handle, so we'll give them one.
*/
mic_driver_microphone_handle_init(&mic_st->microphone, params);
/* If driver_context is NULL, the handle won't have a valid microphone context (but we'll create one later) */
if (driver_context)
{
/* If the microphone driver is ready to open a microphone... */
if (mic_driver_open_mic_internal(&mic_st->microphone)) /* If the microphone was successfully initialized... */
RARCH_LOG("[Microphone]: Opened the requested microphone successfully.\n");
else
goto error;
}
else
{ /* If the driver isn't ready to create a microphone... */
mic_st->microphone.flags |= MICROPHONE_FLAG_PENDING;
RARCH_LOG("[Microphone]: Microphone requested before driver context was ready; deferring initialization.\n");
}
return &mic_st->microphone;
error:
mic_driver_microphone_handle_free(&mic_st->microphone, false);
/* This function cleans up any resources and unsets all flags */
return NULL;
}
static bool microphone_driver_free_devices_list(void)
{
microphone_driver_state_t *mic_st = &mic_driver_st;
if (
!mic_st->driver
|| !mic_st->driver->device_list_free
|| !mic_st->driver_context
|| !mic_st->devices_list)
return false;
mic_st->driver->device_list_free(mic_st->driver_context, mic_st->devices_list);
mic_st->devices_list = NULL;
return true;
}
bool microphone_driver_deinit(bool is_reset)
{
microphone_driver_state_t *mic_st = &mic_driver_st;
const microphone_driver_t *driver = mic_st->driver;
microphone_driver_free_devices_list();
microphone_driver_close_mic_internal(&mic_st->microphone, is_reset);
if (driver && driver->free)
{
if (mic_st->driver_context)
driver->free(mic_st->driver_context);
mic_st->driver_context = NULL;
}
if (mic_st->input_frames)
memalign_free(mic_st->input_frames);
mic_st->input_frames = NULL;
mic_st->input_frames_length = 0;
if (mic_st->converted_input_frames)
memalign_free(mic_st->converted_input_frames);
mic_st->converted_input_frames = NULL;
mic_st->converted_input_frames_length = 0;
if (mic_st->dual_mono_frames)
memalign_free(mic_st->dual_mono_frames);
mic_st->dual_mono_frames = NULL;
mic_st->dual_mono_frames_length = 0;
if (mic_st->resampled_frames)
memalign_free(mic_st->resampled_frames);
mic_st->resampled_frames = NULL;
mic_st->resampled_frames_length = 0;
if (mic_st->resampled_mono_frames)
memalign_free(mic_st->resampled_mono_frames);
mic_st->resampled_mono_frames = NULL;
mic_st->resampled_mono_frames_length = 0;
if (mic_st->final_frames)
memalign_free(mic_st->final_frames);
mic_st->final_frames = NULL;
mic_st->final_frames_length = 0;
mic_st->resampler_quality = RESAMPLER_QUALITY_DONTCARE;
mic_st->flags &= ~MICROPHONE_DRIVER_FLAG_ACTIVE;
memset(mic_st->resampler_ident, '\0', sizeof(mic_st->resampler_ident));
return true;
}
bool microphone_driver_get_devices_list(void **data)
{
struct string_list**ptr = (struct string_list**)data;
if (!ptr)
return false;
*ptr = mic_driver_st.devices_list;
return true;
}
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