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Diffstat (limited to 'alsa-lib/src/pcm/pcm_copy.c')
| -rw-r--r-- | alsa-lib/src/pcm/pcm_copy.c | 299 |
1 files changed, 0 insertions, 299 deletions
diff --git a/alsa-lib/src/pcm/pcm_copy.c b/alsa-lib/src/pcm/pcm_copy.c deleted file mode 100644 index 072bb12..0000000 --- a/alsa-lib/src/pcm/pcm_copy.c +++ /dev/null @@ -1,299 +0,0 @@ -/** - * \file pcm/pcm_copy.c - * \ingroup PCM_Plugins - * \brief PCM Copy Plugin Interface - * \author Abramo Bagnara <abramo@alsa-project.org> - * \date 2000-2001 - */ -/* - * PCM - Copy conversion - * Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org> - * - * - * 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 <byteswap.h> -#include "pcm_local.h" -#include "pcm_plugin.h" - -#ifndef PIC -/* entry for static linking */ -const char *_snd_module_pcm_copy = ""; -#endif - -#ifndef DOC_HIDDEN -typedef struct { - /* This field need to be the first */ - snd_pcm_plugin_t plug; -} snd_pcm_copy_t; -#endif - -static int snd_pcm_copy_hw_refine_cprepare(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_hw_params_t *params) -{ - int err; - snd_pcm_access_mask_t access_mask = { SND_PCM_ACCBIT_SHM }; - err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_ACCESS, - &access_mask); - if (err < 0) - return err; - params->info &= ~(SND_PCM_INFO_MMAP | SND_PCM_INFO_MMAP_VALID); - return 0; -} - -static int snd_pcm_copy_hw_refine_sprepare(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_hw_params_t *sparams) -{ - snd_pcm_access_mask_t saccess_mask = { SND_PCM_ACCBIT_MMAP }; - _snd_pcm_hw_params_any(sparams); - _snd_pcm_hw_param_set_mask(sparams, SND_PCM_HW_PARAM_ACCESS, - &saccess_mask); - return 0; -} - -static int snd_pcm_copy_hw_refine_schange(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_hw_params_t *params, - snd_pcm_hw_params_t *sparams) -{ - int err; - unsigned int links = ~SND_PCM_HW_PARBIT_ACCESS; - err = _snd_pcm_hw_params_refine(sparams, links, params); - if (err < 0) - return err; - return 0; -} - -static int snd_pcm_copy_hw_refine_cchange(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_hw_params_t *params, - snd_pcm_hw_params_t *sparams) -{ - int err; - unsigned int links = ~SND_PCM_HW_PARBIT_ACCESS; - err = _snd_pcm_hw_params_refine(params, links, sparams); - if (err < 0) - return err; - return 0; -} - -static int snd_pcm_copy_hw_refine(snd_pcm_t *pcm, snd_pcm_hw_params_t *params) -{ - return snd_pcm_hw_refine_slave(pcm, params, - snd_pcm_copy_hw_refine_cprepare, - snd_pcm_copy_hw_refine_cchange, - snd_pcm_copy_hw_refine_sprepare, - snd_pcm_copy_hw_refine_schange, - snd_pcm_generic_hw_refine); -} - -static int snd_pcm_copy_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t *params) -{ - return snd_pcm_hw_params_slave(pcm, params, - snd_pcm_copy_hw_refine_cchange, - snd_pcm_copy_hw_refine_sprepare, - snd_pcm_copy_hw_refine_schange, - snd_pcm_generic_hw_params); -} - -static snd_pcm_uframes_t -snd_pcm_copy_write_areas(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) -{ - if (size > *slave_sizep) - size = *slave_sizep; - snd_pcm_areas_copy(slave_areas, slave_offset, - areas, offset, - pcm->channels, size, pcm->format); - *slave_sizep = size; - return size; -} - -static snd_pcm_uframes_t -snd_pcm_copy_read_areas(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) -{ - if (size > *slave_sizep) - size = *slave_sizep; - snd_pcm_areas_copy(areas, offset, - slave_areas, slave_offset, - pcm->channels, size, pcm->format); - *slave_sizep = size; - return size; -} - -static void snd_pcm_copy_dump(snd_pcm_t *pcm, snd_output_t *out) -{ - snd_pcm_copy_t *copy = pcm->private_data; - snd_output_printf(out, "Copy conversion PCM\n"); - if (pcm->setup) { - snd_output_printf(out, "Its setup is:\n"); - snd_pcm_dump_setup(pcm, out); - } - snd_output_printf(out, "Slave: "); - snd_pcm_dump(copy->plug.gen.slave, out); -} - -static const snd_pcm_ops_t snd_pcm_copy_ops = { - .close = snd_pcm_generic_close, - .info = snd_pcm_generic_info, - .hw_refine = snd_pcm_copy_hw_refine, - .hw_params = snd_pcm_copy_hw_params, - .hw_free = snd_pcm_generic_hw_free, - .sw_params = snd_pcm_generic_sw_params, - .channel_info = snd_pcm_generic_channel_info, - .dump = snd_pcm_copy_dump, - .nonblock = snd_pcm_generic_nonblock, - .async = snd_pcm_generic_async, - .mmap = snd_pcm_generic_mmap, - .munmap = snd_pcm_generic_munmap, -}; - -/** - * \brief Creates a new copy PCM - * \param pcmp Returns created PCM handle - * \param name Name of PCM - * \param slave Slave PCM handle - * \param close_slave When set, the slave PCM handle is closed with copy PCM - * \retval zero on success otherwise a negative error code - * \warning Using of this function might be dangerous in the sense - * of compatibility reasons. The prototype might be freely - * changed in future. - */ -int snd_pcm_copy_open(snd_pcm_t **pcmp, const char *name, snd_pcm_t *slave, int close_slave) -{ - snd_pcm_t *pcm; - snd_pcm_copy_t *copy; - int err; - assert(pcmp && slave); - copy = calloc(1, sizeof(snd_pcm_copy_t)); - if (!copy) { - return -ENOMEM; - } - snd_pcm_plugin_init(©->plug); - copy->plug.read = snd_pcm_copy_read_areas; - copy->plug.write = snd_pcm_copy_write_areas; - copy->plug.undo_read = snd_pcm_plugin_undo_read_generic; - copy->plug.undo_write = snd_pcm_plugin_undo_write_generic; - copy->plug.gen.slave = slave; - copy->plug.gen.close_slave = close_slave; - - err = snd_pcm_new(&pcm, SND_PCM_TYPE_COPY, name, slave->stream, slave->mode); - if (err < 0) { - free(copy); - return err; - } - pcm->ops = &snd_pcm_copy_ops; - pcm->fast_ops = &snd_pcm_plugin_fast_ops; - pcm->private_data = copy; - pcm->poll_fd = slave->poll_fd; - pcm->poll_events = slave->poll_events; - pcm->monotonic = slave->monotonic; - snd_pcm_set_hw_ptr(pcm, ©->plug.hw_ptr, -1, 0); - snd_pcm_set_appl_ptr(pcm, ©->plug.appl_ptr, -1, 0); - *pcmp = pcm; - - return 0; -} - -/*! \page pcm_plugins - -\section pcm_plugins_copy Plugin: copy - -This plugin copies samples from master copy PCM to given slave PCM. -The channel count, format and rate must match for both of them. - -\code -pcm.name { - type copy # Copy PCM - slave STR # Slave name - # or - slave { # Slave definition - pcm STR # Slave PCM name - # or - pcm { } # Slave PCM definition - } -} -\endcode - -\subsection pcm_plugins_copy_funcref Function reference - -<UL> - <LI>snd_pcm_copy_open() - <LI>_snd_pcm_copy_open() -</UL> - -*/ - -/** - * \brief Creates a new copy PCM - * \param pcmp Returns created PCM handle - * \param name Name of PCM - * \param root Root configuration node - * \param conf Configuration node with copy PCM description - * \param stream Stream type - * \param mode Stream mode - * \retval zero on success otherwise a negative error code - * \warning Using of this function might be dangerous in the sense - * of compatibility reasons. The prototype might be freely - * changed in future. - */ -int _snd_pcm_copy_open(snd_pcm_t **pcmp, const char *name, - snd_config_t *root, snd_config_t *conf, - snd_pcm_stream_t stream, int mode) -{ - snd_config_iterator_t i, next; - int err; - snd_pcm_t *spcm; - snd_config_t *slave = NULL, *sconf; - snd_config_for_each(i, next, conf) { - snd_config_t *n = snd_config_iterator_entry(i); - const char *id; - if (snd_config_get_id(n, &id) < 0) - continue; - if (snd_pcm_conf_generic_id(id)) - continue; - if (strcmp(id, "slave") == 0) { - slave = n; - continue; - } - SNDERR("Unknown field %s", id); - return -EINVAL; - } - if (!slave) { - SNDERR("slave is not defined"); - return -EINVAL; - } - err = snd_pcm_slave_conf(root, slave, &sconf, 0); - if (err < 0) - return err; - err = snd_pcm_open_slave(&spcm, root, sconf, stream, mode, conf); - snd_config_delete(sconf); - if (err < 0) - return err; - err = snd_pcm_copy_open(pcmp, name, spcm, 1); - if (err < 0) - snd_pcm_close(spcm); - return err; -} -#ifndef DOC_HIDDEN -SND_DLSYM_BUILD_VERSION(_snd_pcm_copy_open, SND_PCM_DLSYM_VERSION); -#endif |