/* * PCM - Common plugin code * Copyright (c) 2000 by Abramo Bagnara * * * 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 "iatomic.h" typedef snd_pcm_uframes_t (*snd_pcm_slave_xfer_areas_func_t) (snd_pcm_t *pcm, const snd_pcm_channel_area_t *areas, snd_pcm_uframes_t offset, snd_pcm_uframes_t size, const snd_pcm_channel_area_t *slave_areas, snd_pcm_uframes_t slave_offset, snd_pcm_uframes_t *slave_sizep); typedef struct { snd_pcm_t *slave; int close_slave; snd_pcm_slave_xfer_areas_func_t read; snd_pcm_slave_xfer_areas_func_t write; snd_pcm_sframes_t (*client_frames)(snd_pcm_t *pcm, snd_pcm_sframes_t frames); snd_pcm_sframes_t (*slave_frames)(snd_pcm_t *pcm, snd_pcm_sframes_t frames); int (*init)(snd_pcm_t *pcm); int shmid; snd_pcm_uframes_t appl_ptr, hw_ptr; snd_atomic_write_t watom; } snd_pcm_plugin_t; int snd_pcm_plugin_close(snd_pcm_t *pcm); int snd_pcm_plugin_card(snd_pcm_t *pcm); int snd_pcm_plugin_nonblock(snd_pcm_t *pcm, int nonblock); int snd_pcm_plugin_async(snd_pcm_t *pcm, int sig, pid_t pid); int snd_pcm_plugin_info(snd_pcm_t *pcm, snd_pcm_info_t * info); int snd_pcm_plugin_hw_free(snd_pcm_t *pcm); int snd_pcm_plugin_sw_refine(snd_pcm_t *pcm, snd_pcm_sw_params_t *params); int snd_pcm_plugin_sw_params(snd_pcm_t *pcm, snd_pcm_sw_params_t *params); int snd_pcm_plugin_channel_info(snd_pcm_t *pcm, snd_pcm_channel_info_t * info); int snd_pcm_plugin_status(snd_pcm_t *pcm, snd_pcm_status_t * status); snd_pcm_state_t snd_pcm_plugin_state(snd_pcm_t *pcm); int snd_pcm_plugin_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp); int snd_pcm_plugin_prepare(snd_pcm_t *pcm); int snd_pcm_plugin_start(snd_pcm_t *pcm); int snd_pcm_plugin_drop(snd_pcm_t *pcm); int snd_pcm_plugin_drain(snd_pcm_t *pcm); int snd_pcm_plugin_pause(snd_pcm_t *pcm, int enable); snd_pcm_sframes_t snd_pcm_plugin_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t frames); snd_pcm_sframes_t snd_pcm_plugin_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size); snd_pcm_sframes_t snd_pcm_plugin_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size); snd_pcm_sframes_t snd_pcm_plugin_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size); snd_pcm_sframes_t snd_pcm_plugin_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size); int snd_pcm_plugin_mmap_commit(snd_pcm_t *pcm, snd_pcm_uframes_t offset, snd_pcm_uframes_t size); snd_pcm_sframes_t snd_pcm_plugin_avail_update(snd_pcm_t *pcm); int snd_pcm_plugin_mmap_status(snd_pcm_t *pcm); int snd_pcm_plugin_mmap_control(snd_pcm_t *pcm); int snd_pcm_plugin_mmap(snd_pcm_t *pcm); int snd_pcm_plugin_munmap_status(snd_pcm_t *pcm); int snd_pcm_plugin_munmap_control(snd_pcm_t *pcm); int snd_pcm_plugin_munmap(snd_pcm_t *pcm); int snd_pcm_plugin_poll_descriptors(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int space); int snd_pcm_plugin_hw_params_slave(snd_pcm_t *pcm, snd_pcm_hw_params_t *params); int snd_pcm_plugin_hw_refine_slave(snd_pcm_t *pcm, snd_pcm_hw_params_t *params); extern snd_pcm_fast_ops_t snd_pcm_plugin_fast_ops; int snd_pcm_linear_get_index(snd_pcm_format_t src_format, snd_pcm_format_t dst_format); int snd_pcm_linear_put_index(snd_pcm_format_t src_format, snd_pcm_format_t dst_format); int snd_pcm_linear_convert_index(snd_pcm_format_t src_format, snd_pcm_format_t dst_format); void snd_pcm_linear_convert(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset, const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset, unsigned int channels, snd_pcm_uframes_t frames, unsigned int convidx); void snd_pcm_alaw_decode(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset, const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset, unsigned int channels, snd_pcm_uframes_t frames, unsigned int putidx); void snd_pcm_alaw_encode(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset, const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset, unsigned int channels, snd_pcm_uframes_t frames, unsigned int getidx); void snd_pcm_mulaw_decode(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset, const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset, unsigned int channels, snd_pcm_uframes_t frames, unsigned int putidx); void snd_pcm_mulaw_encode(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset, const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset, unsigned int channels, snd_pcm_uframes_t frames, unsigned int getidx); typedef struct _snd_pcm_adpcm_state { int pred_val; /* Calculated predicted value */ int step_idx; /* Previous StepSize lookup index */ } snd_pcm_adpcm_state_t; void snd_pcm_adpcm_decode(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset, const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset, unsigned int channels, snd_pcm_uframes_t frames, unsigned int putidx, snd_pcm_adpcm_state_t *states); void snd_pcm_adpcm_encode(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset, const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset, unsigned int channels, snd_pcm_uframes_t frames, unsigned int getidx, snd_pcm_adpcm_state_t *states);