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Extracted common code from dmix plugin.

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Initial framework for dsnoop and dshare plugins.
This commit is contained in:
Jaroslav Kysela 2003-03-18 20:37:42 +00:00
parent 8dcce6339b
commit bc28eccdcd
9 changed files with 2929 additions and 799 deletions
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122
src/pcm/pcm_direct.h Normal file
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/**
* \file pcm/pcm_dmix.c
* \ingroup PCM_Plugins
* \brief PCM Direct Stream Mixing (dmix) Plugin Interface
* \author Jaroslav Kysela <perex@suse.cz>
* \date 2003
*/
/*
* PCM - Direct Stream Mixing
* Copyright (c) 2003 by Jaroslav Kysela <perex@suse.cz>
*
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "pcm_local.h"
#define DIRECT_IPC_SEMS 1
#define DIRECT_IPC_SEM_CLIENT 0
typedef void (mix_areas1_t)(unsigned int size,
volatile signed short *dst, signed short *src,
volatile signed int *sum, unsigned int dst_step,
unsigned int src_step, unsigned int sum_step);
typedef void (mix_areas2_t)(unsigned int size,
volatile signed int *dst, signed int *src,
volatile signed int *sum, unsigned int dst_step,
unsigned int src_step, unsigned int sum_step);
struct slave_params {
snd_pcm_format_t format;
int rate;
int channels;
int period_time;
int buffer_time;
snd_pcm_sframes_t period_size;
snd_pcm_sframes_t buffer_size;
int periods;
};
typedef struct {
char socket_name[256]; /* name of communication socket */
snd_pcm_type_t type; /* PCM type (currently only hw) */
snd_pcm_hw_params_t hw_params;
snd_pcm_sw_params_t sw_params;
struct {
snd_pcm_uframes_t buffer_size;
snd_pcm_uframes_t boundary;
snd_pcm_uframes_t channels;
unsigned int sample_bits;
unsigned int rate;
snd_pcm_format_t format;
} s;
} snd_pcm_direct_share_t;
typedef struct {
key_t ipc_key; /* IPC key for semaphore and memory */
int semid; /* IPC global semaphore identification */
int shmid; /* IPC global shared memory identification */
snd_pcm_direct_share_t *shmptr; /* pointer to shared memory area */
snd_pcm_t *spcm; /* slave PCM handle */
snd_pcm_uframes_t appl_ptr;
snd_pcm_uframes_t hw_ptr;
snd_pcm_uframes_t avail_max;
snd_pcm_uframes_t slave_appl_ptr;
snd_pcm_uframes_t slave_hw_ptr;
snd_pcm_state_t state;
snd_htimestamp_t trigger_tstamp;
int server, client;
int comm_fd; /* communication file descriptor (socket) */
int hw_fd; /* hardware file descriptor */
int poll_fd;
int server_fd;
pid_t server_pid;
snd_timer_t *timer; /* timer used as poll_fd */
int interleaved; /* we have interleaved buffer */
union {
struct {
int shmid_sum; /* IPC global sum ring buffer memory identification */
signed int *sum_buffer; /* shared sum buffer */
mix_areas1_t *mix_areas1;
mix_areas2_t *mix_areas2;
unsigned int channels; /* client's channels */
unsigned int *bindings;
} dmix;
struct {
} dsnoop;
struct {
} dshare;
} u;
} snd_pcm_direct_t;
int snd_pcm_direct_semaphore_create_or_connect(snd_pcm_direct_t *dmix);
int snd_pcm_direct_semaphore_discard(snd_pcm_direct_t *dmix);
int snd_pcm_direct_semaphore_down(snd_pcm_direct_t *dmix, int sem_num);
int snd_pcm_direct_semaphore_up(snd_pcm_direct_t *dmix, int sem_num);
int snd_pcm_direct_shm_create_or_connect(snd_pcm_direct_t *dmix);
int snd_pcm_direct_shm_discard(snd_pcm_direct_t *dmix);
int snd_pcm_direct_server_create(snd_pcm_direct_t *dmix);
int snd_pcm_direct_server_discard(snd_pcm_direct_t *dmix);
int snd_pcm_direct_client_connect(snd_pcm_direct_t *dmix);
int snd_pcm_direct_client_discard(snd_pcm_direct_t *dmix);
int snd_pcm_direct_initialize_slave(snd_pcm_direct_t *dmix, snd_pcm_t *spcm, struct slave_params *params);
int snd_pcm_direct_initialize_poll_fd(snd_pcm_direct_t *dmix);
int snd_pcm_direct_check_interleave(snd_pcm_direct_t *dmix, snd_pcm_t *pcm);
int snd_timer_async(snd_timer_t *timer, int sig, pid_t pid);
struct timespec snd_pcm_hw_fast_tstamp(snd_pcm_t *pcm);