RetroArch/blackberry-qnx/alsa_qsa.c
2014-05-26 18:08:43 +02:00

364 lines
9.3 KiB
C

/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2014 - Daniel De Matteis
*
* 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 "../general.h"
#include "../driver.h"
#define ALSA_PCM_NEW_HW_PARAMS_API
#define ALSA_PCM_NEW_SW_PARAMS_API
#include <sys/asoundlib.h>
#define MAX_FRAG_SIZE 3072
#define DEFAULT_RATE 48000
#define CHANNELS 2
typedef struct alsa
{
uint8_t **buffer;
uint8_t *buffer_chunk;
unsigned buffer_index;
unsigned buffer_ptr;
volatile unsigned buffered_blocks;
snd_pcm_t *pcm;
bool nonblock;
bool has_float;
bool can_pause;
bool is_paused;
unsigned buf_size;
unsigned buf_count;
} alsa_t;
typedef long snd_pcm_sframes_t;
static void *alsa_qsa_init(const char *device, unsigned rate, unsigned latency)
{
int err, card, dev, i;
snd_pcm_channel_params_t params = {0};
snd_pcm_channel_info_t pi;
snd_pcm_channel_setup_t setup = {0};
alsa_t *alsa;
(void)device;
(void)rate;
(void)latency;
alsa = (alsa_t*)calloc(1, sizeof(alsa_t));
if (!alsa)
return NULL;
if ((err = snd_pcm_open_preferred(&alsa->pcm, &card, &dev,
SND_PCM_OPEN_PLAYBACK)) < 0)
{
RARCH_ERR("[ALSA QSA]: Audio open error: %s\n", snd_strerror(err));
goto error;
}
if((err = snd_pcm_nonblock_mode(alsa->pcm, 1)) < 0)
{
RARCH_ERR("[ALSA QSA]: Can't set blocking mode: %s\n", snd_strerror(err));
goto error;
}
memset(&pi, 0, sizeof(pi));
pi.channel = SND_PCM_CHANNEL_PLAYBACK;
if ((err = snd_pcm_channel_info(alsa->pcm, &pi)) < 0)
{
RARCH_ERR("[ALSA QSA]: snd_pcm_channel_info failed: %s\n",
snd_strerror(err));
goto error;
}
memset(&params, 0, sizeof(params));
params.channel = SND_PCM_CHANNEL_PLAYBACK;
params.mode = SND_PCM_MODE_BLOCK;
params.format.interleave = 1;
params.format.format = SND_PCM_SFMT_S16_LE;
params.format.rate = DEFAULT_RATE;
params.format.voices = 2;
params.start_mode = SND_PCM_START_FULL;
params.stop_mode = SND_PCM_STOP_STOP;
params.buf.block.frag_size = pi.max_fragment_size;
params.buf.block.frags_min = 2;
params.buf.block.frags_max = 8;
RARCH_LOG("Fragment size: %d\n", params.buf.block.frag_size);
RARCH_LOG("Min Fragment size: %d\n", params.buf.block.frags_min);
RARCH_LOG("Max Fragment size: %d\n", params.buf.block.frags_max);
if ((err = snd_pcm_channel_params(alsa->pcm, &params)) < 0)
{
RARCH_ERR("[ALSA QSA]: Channel Parameter Error: %s\n", snd_strerror(err));
goto error;
}
setup.channel = SND_PCM_CHANNEL_PLAYBACK;
if ((err = snd_pcm_channel_setup(alsa->pcm, &setup)) < 0)
{
RARCH_ERR("[ALSA QSA]: Channel Parameter Read Back Error: %s\n", snd_strerror(err));
goto error;
}
if (g_settings.audio.block_frames)
alsa->buf_size = g_settings.audio.block_frames * 4;
else
alsa->buf_size = next_pow2(32 * latency);
RARCH_LOG("[ALSA QSA]: buffer size: %d bytes\n", alsa->buf_size);
alsa->buf_count = (latency * 4 * rate + 500) / 1000;
alsa->buf_count = (alsa->buf_count + alsa->buf_size / 2) / alsa->buf_size;
if ((err = snd_pcm_channel_prepare(alsa->pcm, SND_PCM_CHANNEL_PLAYBACK)) < 0)
{
RARCH_ERR("[ALSA QSA]: Channel Prepare Error: %s\n", snd_strerror(err));
goto error;
}
alsa->buffer = (uint8_t**)calloc(sizeof(uint8_t*), alsa->buf_count);
if (!alsa->buffer)
goto error;
alsa->buffer_chunk = (uint8_t*)calloc(alsa->buf_count, alsa->buf_size);
if (!alsa->buffer_chunk)
goto error;
for (i = 0; i < alsa->buf_count; i++)
alsa->buffer[i] = alsa->buffer_chunk + i * alsa->buf_size;
alsa->has_float = false;
alsa->can_pause = true;
RARCH_LOG("[ALSA QSA]: Can pause: %s.\n", alsa->can_pause ? "yes" : "no");
return alsa;
error:
return (void*)-1;
}
static int check_pcm_status(void *data, int channel_type)
{
alsa_t *alsa = (alsa_t*)data;
snd_pcm_channel_status_t status;
int ret = EOK;
memset(&status, 0, sizeof (status));
status.channel = channel_type;
if ((ret = snd_pcm_channel_status(alsa->pcm, &status)) == 0)
{
if (status.status == SND_PCM_STATUS_UNSECURE)
{
RARCH_ERR("check_pcm_status got SND_PCM_STATUS_UNSECURE, aborting playback\n");
ret = -EPROTO;
}
else if (status.status == SND_PCM_STATUS_UNDERRUN)
{
RARCH_LOG("check_pcm_status: SNDP_CM_STATUS_UNDERRUN.\n");
if ((ret = snd_pcm_channel_prepare(alsa->pcm, channel_type)) < 0)
{
RARCH_ERR("Invalid state detected for underrun on snd_pcm_channel_prepare: %s\n", snd_strerror(ret));
ret = -EPROTO;
}
}
else if (status.status == SND_PCM_STATUS_OVERRUN)
{
RARCH_LOG("check_pcm_status: SNDP_CM_STATUS_OVERRUN.\n");
if ((ret = snd_pcm_channel_prepare(alsa->pcm, channel_type)) < 0)
{
RARCH_ERR("Invalid state detected for overrun on snd_pcm_channel_prepare: %s\n", snd_strerror(ret));
ret = -EPROTO;
}
}
else if (status.status == SND_PCM_STATUS_CHANGE)
{
RARCH_LOG("check_pcm_status: SNDP_CM_STATUS_CHANGE.\n");
if ((ret = snd_pcm_channel_prepare(alsa->pcm, channel_type)) < 0)
{
RARCH_ERR("Invalid state detected for change on snd_pcm_channel_prepare: %s\n", snd_strerror(ret));
ret = -EPROTO;
}
}
}
else
{
RARCH_ERR("check_pcm_status failed: %s\n", snd_strerror(ret));
if (ret == -ESRCH)
ret = -EBADF;
}
return ret;
}
static ssize_t alsa_qsa_write(void *data, const void *buf, size_t size)
{
int status;
alsa_t *alsa = (alsa_t*)data;
snd_pcm_channel_status_t cstatus = {0};
snd_pcm_sframes_t written = 0;
while (size)
{
size_t avail_write = min(alsa->buf_size - alsa->buffer_ptr, size);
if (avail_write)
{
memcpy(alsa->buffer[alsa->buffer_index] + alsa->buffer_ptr, buf, avail_write);
alsa->buffer_ptr += avail_write;
buf += avail_write;
size -= avail_write;
written += avail_write;
}
if (alsa->buffer_ptr >= alsa->buf_size)
{
snd_pcm_sframes_t frames = snd_pcm_write(alsa->pcm, alsa->buffer[alsa->buffer_index], alsa->buf_size);
alsa->buffer_index = (alsa->buffer_index + 1) % alsa->buf_count;
alsa->buffer_ptr = 0;
if (frames <= 0)
{
int ret;
if (frames == -EAGAIN)
continue;
ret = check_pcm_status(alsa, SND_PCM_CHANNEL_PLAYBACK);
if (ret == -EPROTO || ret == -EBADF)
return -1;
}
}
}
return written;
}
static bool alsa_qsa_stop(void *data)
{
alsa_t *alsa = (alsa_t*)data;
if (alsa->can_pause && !alsa->is_paused)
{
if (snd_pcm_playback_pause(alsa->pcm) == 0)
{
alsa->is_paused = true;
return true;
}
else
return false;
}
else
return true;
}
static void alsa_qsa_set_nonblock_state(void *data, bool state)
{
alsa_t *alsa = (alsa_t*)data;
int err;
if((err = snd_pcm_nonblock_mode(alsa->pcm, state)) < 0)
{
RARCH_ERR("Can't set blocking mode to %d: %s\n", state,
snd_strerror(err));
return;
}
alsa->nonblock = state;
}
static bool alsa_qsa_start(void *data)
{
alsa_t *alsa = (alsa_t*)data;
if (alsa->can_pause && alsa->is_paused)
{
int ret = snd_pcm_playback_resume(alsa->pcm);
if (ret < 0)
{
RARCH_ERR("[ALSA QSA]: Failed to unpause: %s.\n", snd_strerror(ret));
return false;
}
else
{
alsa->is_paused = false;
return true;
}
}
else
return true;
}
static bool alsa_qsa_use_float(void *data)
{
alsa_t *alsa = (alsa_t*)data;
return alsa->has_float;
}
static void alsa_qsa_free(void *data)
{
alsa_t *alsa = (alsa_t*)data;
if (alsa)
{
if (alsa->pcm)
{
snd_pcm_close(alsa->pcm);
alsa->pcm = NULL;
}
free(alsa->buffer);
free(alsa->buffer_chunk);
free(alsa);
}
}
static size_t alsa_qsa_write_avail(void *data)
{
alsa_t *alsa = (alsa_t*)data;
size_t avail = (alsa->buf_count - (int)alsa->buffered_blocks - 1) * alsa->buf_size + (alsa->buf_size - (int)alsa->buffer_ptr);
return avail;
}
static size_t alsa_qsa_buffer_size(void *data)
{
alsa_t *alsa = (alsa_t*)data;
return alsa->buf_size * alsa->buf_count;
}
const audio_driver_t audio_alsa = {
alsa_qsa_init,
alsa_qsa_write,
alsa_qsa_stop,
alsa_qsa_start,
alsa_qsa_set_nonblock_state,
alsa_qsa_free,
alsa_qsa_use_float,
"alsa",
alsa_qsa_write_avail,
alsa_qsa_buffer_size,
};