mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-11-05 13:30:00 -05:00
af89cefd99
- added poll_events to main pcm structure
- added poll_revents callback to pcm->ops structure
- fixed snd_pcm_wait() - call revents function and enhanced
error code reporting
DMIX plugin:
- more complete code (works at least for one instance)
- still no "mix" code (it's silent)
163 lines
7.6 KiB
C
163 lines
7.6 KiB
C
/*
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* PCM - Common plugin code
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* Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
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*
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "iatomic.h"
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typedef snd_pcm_uframes_t (*snd_pcm_slave_xfer_areas_func_t)
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(snd_pcm_t *pcm,
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const snd_pcm_channel_area_t *areas,
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snd_pcm_uframes_t offset,
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snd_pcm_uframes_t size,
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const snd_pcm_channel_area_t *slave_areas,
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snd_pcm_uframes_t slave_offset,
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snd_pcm_uframes_t *slave_sizep);
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typedef snd_pcm_sframes_t (*snd_pcm_slave_xfer_areas_undo_func_t)
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(snd_pcm_t *pcm,
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const snd_pcm_channel_area_t *res_areas, /* result areas */
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snd_pcm_uframes_t res_offset, /* offset of result areas */
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snd_pcm_uframes_t res_size, /* size of result areas */
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snd_pcm_uframes_t slave_undo_size);
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typedef struct {
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snd_pcm_t *slave;
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int close_slave;
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snd_pcm_slave_xfer_areas_func_t read;
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snd_pcm_slave_xfer_areas_func_t write;
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snd_pcm_slave_xfer_areas_undo_func_t undo_read;
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snd_pcm_slave_xfer_areas_undo_func_t undo_write;
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snd_pcm_sframes_t (*client_frames)(snd_pcm_t *pcm, snd_pcm_sframes_t frames);
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snd_pcm_sframes_t (*slave_frames)(snd_pcm_t *pcm, snd_pcm_sframes_t frames);
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int (*init)(snd_pcm_t *pcm);
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snd_pcm_uframes_t appl_ptr, hw_ptr;
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snd_atomic_write_t watom;
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} snd_pcm_plugin_t;
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void snd_pcm_plugin_init(snd_pcm_plugin_t *plugin);
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int snd_pcm_plugin_close(snd_pcm_t *pcm);
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int snd_pcm_plugin_card(snd_pcm_t *pcm);
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int snd_pcm_plugin_nonblock(snd_pcm_t *pcm, int nonblock);
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int snd_pcm_plugin_async(snd_pcm_t *pcm, int sig, pid_t pid);
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int snd_pcm_plugin_poll_revents(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
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int snd_pcm_plugin_info(snd_pcm_t *pcm, snd_pcm_info_t * info);
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int snd_pcm_plugin_hw_free(snd_pcm_t *pcm);
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int snd_pcm_plugin_sw_refine(snd_pcm_t *pcm, snd_pcm_sw_params_t *params);
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int snd_pcm_plugin_sw_params(snd_pcm_t *pcm, snd_pcm_sw_params_t *params);
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int snd_pcm_plugin_channel_info(snd_pcm_t *pcm, snd_pcm_channel_info_t * info);
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int snd_pcm_plugin_status(snd_pcm_t *pcm, snd_pcm_status_t * status);
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snd_pcm_state_t snd_pcm_plugin_state(snd_pcm_t *pcm);
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int snd_pcm_plugin_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp);
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int snd_pcm_plugin_prepare(snd_pcm_t *pcm);
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int snd_pcm_plugin_start(snd_pcm_t *pcm);
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int snd_pcm_plugin_drop(snd_pcm_t *pcm);
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int snd_pcm_plugin_drain(snd_pcm_t *pcm);
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int snd_pcm_plugin_pause(snd_pcm_t *pcm, int enable);
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snd_pcm_sframes_t snd_pcm_plugin_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t frames);
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snd_pcm_sframes_t snd_pcm_plugin_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size);
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snd_pcm_sframes_t snd_pcm_plugin_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
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snd_pcm_sframes_t snd_pcm_plugin_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size);
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snd_pcm_sframes_t snd_pcm_plugin_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
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snd_pcm_sframes_t snd_pcm_plugin_mmap_commit(snd_pcm_t *pcm, snd_pcm_uframes_t offset, snd_pcm_uframes_t size);
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snd_pcm_sframes_t snd_pcm_plugin_avail_update(snd_pcm_t *pcm);
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int snd_pcm_plugin_mmap_status(snd_pcm_t *pcm);
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int snd_pcm_plugin_mmap_control(snd_pcm_t *pcm);
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int snd_pcm_plugin_mmap(snd_pcm_t *pcm);
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int snd_pcm_plugin_munmap_status(snd_pcm_t *pcm);
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int snd_pcm_plugin_munmap_control(snd_pcm_t *pcm);
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int snd_pcm_plugin_munmap(snd_pcm_t *pcm);
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int snd_pcm_plugin_poll_descriptors(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int space);
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int snd_pcm_plugin_hw_params_slave(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);
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int snd_pcm_plugin_hw_refine_slave(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);
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extern snd_pcm_fast_ops_t snd_pcm_plugin_fast_ops;
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snd_pcm_sframes_t snd_pcm_plugin_undo_read_generic
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(snd_pcm_t *pcm,
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const snd_pcm_channel_area_t *res_areas, /* result areas */
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snd_pcm_uframes_t res_offset, /* offset of result areas */
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snd_pcm_uframes_t res_size, /* size of result areas */
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snd_pcm_uframes_t slave_undo_size);
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snd_pcm_sframes_t snd_pcm_plugin_undo_write_generic
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(snd_pcm_t *pcm,
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const snd_pcm_channel_area_t *res_areas, /* result areas */
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snd_pcm_uframes_t res_offset, /* offset of result areas */
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snd_pcm_uframes_t res_size, /* size of result areas */
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snd_pcm_uframes_t slave_undo_size);
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int snd_pcm_linear_get_index(snd_pcm_format_t src_format, snd_pcm_format_t dst_format);
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int snd_pcm_linear_put_index(snd_pcm_format_t src_format, snd_pcm_format_t dst_format);
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int snd_pcm_linear_get32_index(snd_pcm_format_t src_format, snd_pcm_format_t dst_format);
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int snd_pcm_linear_put32_index(snd_pcm_format_t src_format, snd_pcm_format_t dst_format);
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int snd_pcm_linear_convert_index(snd_pcm_format_t src_format, snd_pcm_format_t dst_format);
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void snd_pcm_linear_convert(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset,
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const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset,
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unsigned int channels, snd_pcm_uframes_t frames,
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unsigned int convidx);
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void snd_pcm_linear_getput(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset,
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const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset,
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unsigned int channels, snd_pcm_uframes_t frames,
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unsigned int get_idx, unsigned int put_idx);
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void snd_pcm_alaw_decode(const snd_pcm_channel_area_t *dst_areas,
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snd_pcm_uframes_t dst_offset,
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const snd_pcm_channel_area_t *src_areas,
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snd_pcm_uframes_t src_offset,
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unsigned int channels, snd_pcm_uframes_t frames,
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unsigned int putidx);
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void snd_pcm_alaw_encode(const snd_pcm_channel_area_t *dst_areas,
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snd_pcm_uframes_t dst_offset,
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const snd_pcm_channel_area_t *src_areas,
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snd_pcm_uframes_t src_offset,
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unsigned int channels, snd_pcm_uframes_t frames,
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unsigned int getidx);
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void snd_pcm_mulaw_decode(const snd_pcm_channel_area_t *dst_areas,
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snd_pcm_uframes_t dst_offset,
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const snd_pcm_channel_area_t *src_areas,
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snd_pcm_uframes_t src_offset,
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unsigned int channels, snd_pcm_uframes_t frames,
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unsigned int putidx);
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void snd_pcm_mulaw_encode(const snd_pcm_channel_area_t *dst_areas,
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snd_pcm_uframes_t dst_offset,
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const snd_pcm_channel_area_t *src_areas,
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snd_pcm_uframes_t src_offset,
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unsigned int channels, snd_pcm_uframes_t frames,
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unsigned int getidx);
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typedef struct _snd_pcm_adpcm_state {
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int pred_val; /* Calculated predicted value */
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int step_idx; /* Previous StepSize lookup index */
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} snd_pcm_adpcm_state_t;
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void snd_pcm_adpcm_decode(const snd_pcm_channel_area_t *dst_areas,
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snd_pcm_uframes_t dst_offset,
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const snd_pcm_channel_area_t *src_areas,
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snd_pcm_uframes_t src_offset,
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unsigned int channels, snd_pcm_uframes_t frames,
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unsigned int putidx,
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snd_pcm_adpcm_state_t *states);
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void snd_pcm_adpcm_encode(const snd_pcm_channel_area_t *dst_areas,
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snd_pcm_uframes_t dst_offset,
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const snd_pcm_channel_area_t *src_areas,
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snd_pcm_uframes_t src_offset,
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unsigned int channels, snd_pcm_uframes_t frames,
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unsigned int getidx,
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snd_pcm_adpcm_state_t *states);
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