580 lines
15 KiB
C
580 lines
15 KiB
C
/* Spa ALSA Device
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*
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* Copyright © 2018 Wim Taymans
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <stddef.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <alsa/asoundlib.h>
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#include <spa/support/log.h>
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#include <spa/utils/type.h>
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#include <spa/node/node.h>
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#include <spa/utils/keys.h>
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#include <spa/utils/names.h>
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#include <spa/utils/string.h>
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#include <spa/support/loop.h>
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#include <spa/support/plugin.h>
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#include <spa/monitor/device.h>
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#include <spa/monitor/utils.h>
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#include <spa/param/param.h>
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#include <spa/pod/filter.h>
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#include <spa/pod/parser.h>
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#include <spa/debug/pod.h>
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#define NAME "alsa-device"
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#define MAX_DEVICES 64
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static const char default_device[] = "hw:0";
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struct props {
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char device[64];
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};
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static void reset_props(struct props *props)
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{
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strncpy(props->device, default_device, 64);
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}
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struct impl {
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struct spa_handle handle;
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struct spa_device device;
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struct spa_log *log;
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struct spa_hook_list hooks;
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struct props props;
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uint32_t n_nodes;
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uint32_t n_capture;
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uint32_t n_playback;
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uint32_t profile;
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};
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static const char *get_stream(snd_pcm_info_t *pcminfo)
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{
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switch (snd_pcm_info_get_stream(pcminfo)) {
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case SND_PCM_STREAM_PLAYBACK:
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return "playback";
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case SND_PCM_STREAM_CAPTURE:
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return "capture";
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default:
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return "unknown";
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}
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}
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static const char *get_class(snd_pcm_info_t *pcminfo)
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{
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switch (snd_pcm_info_get_class(pcminfo)) {
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case SND_PCM_CLASS_GENERIC:
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return "generic";
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case SND_PCM_CLASS_MULTI:
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return "multichannel";
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case SND_PCM_CLASS_MODEM:
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return "modem";
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case SND_PCM_CLASS_DIGITIZER:
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return "digitizer";
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default:
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return "unknown";
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}
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}
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static const char *get_subclass(snd_pcm_info_t *pcminfo)
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{
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switch (snd_pcm_info_get_subclass(pcminfo)) {
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case SND_PCM_SUBCLASS_GENERIC_MIX:
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return "generic-mix";
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case SND_PCM_SUBCLASS_MULTI_MIX:
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return "multichannel-mix";
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default:
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return "unknown";
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}
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}
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static int emit_node(struct impl *this, snd_ctl_card_info_t *cardinfo, snd_pcm_info_t *pcminfo, uint32_t id)
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{
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struct spa_dict_item items[12];
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char device_name[128], path[180];
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char sync_name[128], dev[16], subdev[16], card[16];
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struct spa_device_object_info info;
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snd_pcm_sync_id_t sync_id;
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const char *stream;
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info = SPA_DEVICE_OBJECT_INFO_INIT();
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info.type = SPA_TYPE_INTERFACE_Node;
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if (snd_pcm_info_get_stream(pcminfo) == SND_PCM_STREAM_PLAYBACK) {
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info.factory_name = SPA_NAME_API_ALSA_PCM_SINK;
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stream = "playback";
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} else {
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info.factory_name = SPA_NAME_API_ALSA_PCM_SOURCE;
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stream = "capture";
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}
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info.change_mask = SPA_DEVICE_OBJECT_CHANGE_MASK_PROPS;
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snprintf(card, sizeof(card), "%d", snd_pcm_info_get_card(pcminfo));
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snprintf(dev, sizeof(dev), "%d", snd_pcm_info_get_device(pcminfo));
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snprintf(subdev, sizeof(subdev), "%d", snd_pcm_info_get_subdevice(pcminfo));
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snprintf(device_name, sizeof(device_name), "%s,%s", this->props.device, dev);
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snprintf(path, sizeof(path), "alsa:pcm:%s:%s:%s", snd_ctl_card_info_get_id(cardinfo), dev, stream);
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items[0] = SPA_DICT_ITEM_INIT(SPA_KEY_OBJECT_PATH, path);
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items[1] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PATH, device_name);
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items[2] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_CARD, card);
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items[3] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_DEVICE, dev);
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items[4] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_SUBDEVICE, subdev);
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items[5] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_STREAM, get_stream(pcminfo));
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items[6] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_ID, snd_pcm_info_get_id(pcminfo));
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items[7] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_NAME, snd_pcm_info_get_name(pcminfo));
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items[8] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_SUBNAME, snd_pcm_info_get_subdevice_name(pcminfo));
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items[9] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_CLASS, get_class(pcminfo));
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items[10] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_SUBCLASS, get_subclass(pcminfo));
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sync_id = snd_pcm_info_get_sync(pcminfo);
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snprintf(sync_name, sizeof(sync_name), "%08x:%08x:%08x:%08x",
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sync_id.id32[0], sync_id.id32[1], sync_id.id32[2], sync_id.id32[3]);
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items[11] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_SYNC_ID, sync_name);
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info.props = &SPA_DICT_INIT_ARRAY(items);
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spa_device_emit_object_info(&this->hooks, id, &info);
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return 0;
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}
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static int activate_profile(struct impl *this, snd_ctl_t *ctl_hndl, uint32_t id)
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{
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int err = 0, dev;
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uint32_t i, n_cap, n_play;
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snd_pcm_info_t *pcminfo;
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snd_ctl_card_info_t *cardinfo;
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spa_log_debug(this->log, "profile %d", id);
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this->profile = id;
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snd_ctl_card_info_alloca(&cardinfo);
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if ((err = snd_ctl_card_info(ctl_hndl, cardinfo)) < 0) {
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spa_log_error(this->log, "error card info: %s", snd_strerror(err));
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return err;
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}
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for (i = 0; i < this->n_nodes; i++)
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spa_device_emit_object_info(&this->hooks, i, NULL);
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this->n_nodes = this->n_capture = this->n_playback = 0;
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if (id == 0)
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return 0;
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snd_pcm_info_alloca(&pcminfo);
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dev = -1;
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i = n_cap = n_play = 0;
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while (1) {
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if ((err = snd_ctl_pcm_next_device(ctl_hndl, &dev)) < 0) {
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spa_log_error(this->log, "error iterating devices: %s", snd_strerror(err));
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break;
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}
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if (dev < 0)
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break;
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snd_pcm_info_set_device(pcminfo, dev);
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snd_pcm_info_set_subdevice(pcminfo, 0);
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snd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_PLAYBACK);
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if ((err = snd_ctl_pcm_info(ctl_hndl, pcminfo)) < 0) {
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if (err != -ENOENT)
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spa_log_error(this->log, "error pcm info: %s", snd_strerror(err));
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}
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if (err >= 0) {
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n_play++;
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emit_node(this, cardinfo, pcminfo, i++);
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}
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snd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_CAPTURE);
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if ((err = snd_ctl_pcm_info(ctl_hndl, pcminfo)) < 0) {
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if (err != -ENOENT)
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spa_log_error(this->log, "error pcm info: %s", snd_strerror(err));
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}
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if (err >= 0) {
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n_cap++;
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emit_node(this, cardinfo, pcminfo, i++);
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}
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}
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this->n_capture = n_cap;
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this->n_playback = n_play;
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this->n_nodes = i;
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return err;
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}
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static int set_profile(struct impl *this, uint32_t id)
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{
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snd_ctl_t *ctl_hndl;
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int err;
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spa_log_debug(this->log, "open card %s", this->props.device);
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if ((err = snd_ctl_open(&ctl_hndl, this->props.device, 0)) < 0) {
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spa_log_error(this->log, "can't open control for card %s: %s",
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this->props.device, snd_strerror(err));
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return err;
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}
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err = activate_profile(this, ctl_hndl, id);
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spa_log_debug(this->log, "close card %s", this->props.device);
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snd_ctl_close(ctl_hndl);
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return err;
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}
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static int emit_info(struct impl *this, bool full)
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{
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int err = 0;
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struct spa_dict_item items[20];
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uint32_t n_items = 0;
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snd_ctl_t *ctl_hndl;
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snd_ctl_card_info_t *info;
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struct spa_device_info dinfo;
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struct spa_param_info params[2];
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char path[128];
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spa_log_debug(this->log, "open card %s", this->props.device);
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if ((err = snd_ctl_open(&ctl_hndl, this->props.device, 0)) < 0) {
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spa_log_error(this->log, "can't open control for card %s: %s",
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this->props.device, snd_strerror(err));
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return err;
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}
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snd_ctl_card_info_alloca(&info);
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if ((err = snd_ctl_card_info(ctl_hndl, info)) < 0) {
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spa_log_error(this->log, "error hardware info: %s", snd_strerror(err));
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goto exit;
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}
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dinfo = SPA_DEVICE_INFO_INIT();
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dinfo.change_mask = SPA_DEVICE_CHANGE_MASK_PROPS;
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#define ADD_ITEM(key, value) items[n_items++] = SPA_DICT_ITEM_INIT(key, value)
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snprintf(path, sizeof(path), "alsa:pcm:%s", snd_ctl_card_info_get_id(info));
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ADD_ITEM(SPA_KEY_OBJECT_PATH, path);
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ADD_ITEM(SPA_KEY_DEVICE_API, "alsa:pcm");
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ADD_ITEM(SPA_KEY_MEDIA_CLASS, "Audio/Device");
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ADD_ITEM(SPA_KEY_API_ALSA_PATH, (char *)this->props.device);
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ADD_ITEM(SPA_KEY_API_ALSA_CARD_ID, snd_ctl_card_info_get_id(info));
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ADD_ITEM(SPA_KEY_API_ALSA_CARD_COMPONENTS, snd_ctl_card_info_get_components(info));
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ADD_ITEM(SPA_KEY_API_ALSA_CARD_DRIVER, snd_ctl_card_info_get_driver(info));
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ADD_ITEM(SPA_KEY_API_ALSA_CARD_NAME, snd_ctl_card_info_get_name(info));
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ADD_ITEM(SPA_KEY_API_ALSA_CARD_LONGNAME, snd_ctl_card_info_get_longname(info));
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ADD_ITEM(SPA_KEY_API_ALSA_CARD_MIXERNAME, snd_ctl_card_info_get_mixername(info));
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dinfo.props = &SPA_DICT_INIT(items, n_items);
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#undef ADD_ITEM
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dinfo.change_mask |= SPA_DEVICE_CHANGE_MASK_PARAMS;
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params[0] = SPA_PARAM_INFO(SPA_PARAM_EnumProfile, SPA_PARAM_INFO_READ);
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params[1] = SPA_PARAM_INFO(SPA_PARAM_Profile, SPA_PARAM_INFO_READWRITE);
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dinfo.n_params = SPA_N_ELEMENTS(params);
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dinfo.params = params;
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spa_device_emit_info(&this->hooks, &dinfo);
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exit:
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spa_log_debug(this->log, "close card %s", this->props.device);
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snd_ctl_close(ctl_hndl);
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return err;
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}
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static int impl_add_listener(void *object,
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struct spa_hook *listener,
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const struct spa_device_events *events,
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void *data)
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{
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struct impl *this = object;
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struct spa_hook_list save;
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spa_return_val_if_fail(this != NULL, -EINVAL);
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spa_return_val_if_fail(events != NULL, -EINVAL);
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spa_hook_list_isolate(&this->hooks, &save, listener, events, data);
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if (events->info || events->object_info)
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emit_info(this, true);
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spa_hook_list_join(&this->hooks, &save);
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return 0;
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}
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static int impl_sync(void *object, int seq)
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{
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struct impl *this = object;
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spa_return_val_if_fail(this != NULL, -EINVAL);
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spa_device_emit_result(&this->hooks, seq, 0, 0, NULL);
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return 0;
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}
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static struct spa_pod *build_profile(struct impl *this, struct spa_pod_builder *b,
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uint32_t id, uint32_t index)
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{
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struct spa_pod_frame f[2];
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const char *name, *desc;
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switch (index) {
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case 0:
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name = "off";
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desc = "Off";
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break;
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case 1:
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name = "on";
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desc = "On";
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break;
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default:
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errno = EINVAL;
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return NULL;
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}
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spa_pod_builder_push_object(b, &f[0], SPA_TYPE_OBJECT_ParamProfile, id);
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spa_pod_builder_add(b,
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SPA_PARAM_PROFILE_index, SPA_POD_Int(index),
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SPA_PARAM_PROFILE_name, SPA_POD_String(name),
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SPA_PARAM_PROFILE_description, SPA_POD_String(desc),
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0);
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if (index == 1) {
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spa_pod_builder_prop(b, SPA_PARAM_PROFILE_classes, 0);
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spa_pod_builder_push_struct(b, &f[1]);
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if (this->n_capture) {
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spa_pod_builder_add_struct(b,
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SPA_POD_String("Audio/Source"),
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SPA_POD_Int(this->n_capture));
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}
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if (this->n_playback) {
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spa_pod_builder_add_struct(b,
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SPA_POD_String("Audio/Sink"),
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SPA_POD_Int(this->n_playback));
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}
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spa_pod_builder_pop(b, &f[1]);
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}
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return spa_pod_builder_pop(b, &f[0]);
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}
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static int impl_enum_params(void *object, int seq,
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uint32_t id, uint32_t start, uint32_t num,
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const struct spa_pod *filter)
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{
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struct impl *this = object;
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struct spa_pod *param;
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struct spa_pod_builder b = { 0 };
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uint8_t buffer[1024];
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struct spa_result_device_params result;
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uint32_t count = 0;
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spa_return_val_if_fail(this != NULL, -EINVAL);
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spa_return_val_if_fail(num != 0, -EINVAL);
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result.id = id;
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result.next = start;
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next:
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result.index = result.next++;
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spa_pod_builder_init(&b, buffer, sizeof(buffer));
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switch (id) {
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case SPA_PARAM_EnumProfile:
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{
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switch (result.index) {
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case 0:
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case 1:
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param = build_profile(this, &b, id, result.index);
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break;
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default:
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return 0;
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}
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break;
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}
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case SPA_PARAM_Profile:
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{
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switch (result.index) {
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case 0:
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param = build_profile(this, &b, id, this->profile);
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break;
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default:
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return 0;
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}
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break;
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}
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default:
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return -ENOENT;
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}
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if (spa_pod_filter(&b, &result.param, param, filter) < 0)
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goto next;
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spa_device_emit_result(&this->hooks, seq, 0,
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SPA_RESULT_TYPE_DEVICE_PARAMS, &result);
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if (++count != num)
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goto next;
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return 0;
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}
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static int impl_set_param(void *object,
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uint32_t id, uint32_t flags,
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const struct spa_pod *param)
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{
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struct impl *this = object;
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int res;
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spa_return_val_if_fail(this != NULL, -EINVAL);
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switch (id) {
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case SPA_PARAM_Profile:
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{
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uint32_t idx;
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if ((res = spa_pod_parse_object(param,
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SPA_TYPE_OBJECT_ParamProfile, NULL,
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SPA_PARAM_PROFILE_index, SPA_POD_Int(&idx))) < 0) {
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spa_log_warn(this->log, "can't parse profile");
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spa_debug_pod(0, NULL, param);
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return res;
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}
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|
set_profile(this, idx);
|
|
break;
|
|
}
|
|
default:
|
|
return -ENOENT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct spa_device_methods impl_device = {
|
|
SPA_VERSION_DEVICE_METHODS,
|
|
.add_listener = impl_add_listener,
|
|
.sync = impl_sync,
|
|
.enum_params = impl_enum_params,
|
|
.set_param = impl_set_param,
|
|
};
|
|
|
|
static int impl_get_interface(struct spa_handle *handle, const char *type, void **interface)
|
|
{
|
|
struct impl *this;
|
|
|
|
spa_return_val_if_fail(handle != NULL, -EINVAL);
|
|
spa_return_val_if_fail(interface != NULL, -EINVAL);
|
|
|
|
this = (struct impl *) handle;
|
|
|
|
if (spa_streq(type, SPA_TYPE_INTERFACE_Device))
|
|
*interface = &this->device;
|
|
else
|
|
return -ENOENT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int impl_clear(struct spa_handle *handle)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static size_t
|
|
impl_get_size(const struct spa_handle_factory *factory,
|
|
const struct spa_dict *params)
|
|
{
|
|
return sizeof(struct impl);
|
|
}
|
|
|
|
static int
|
|
impl_init(const struct spa_handle_factory *factory,
|
|
struct spa_handle *handle,
|
|
const struct spa_dict *info,
|
|
const struct spa_support *support,
|
|
uint32_t n_support)
|
|
{
|
|
struct impl *this;
|
|
const char *str;
|
|
|
|
spa_return_val_if_fail(factory != NULL, -EINVAL);
|
|
spa_return_val_if_fail(handle != NULL, -EINVAL);
|
|
|
|
handle->get_interface = impl_get_interface;
|
|
handle->clear = impl_clear;
|
|
|
|
this = (struct impl *) handle;
|
|
|
|
this->log = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Log);
|
|
|
|
this->device.iface = SPA_INTERFACE_INIT(
|
|
SPA_TYPE_INTERFACE_Device,
|
|
SPA_VERSION_DEVICE,
|
|
&impl_device, this);
|
|
spa_hook_list_init(&this->hooks);
|
|
|
|
reset_props(&this->props);
|
|
|
|
snd_config_update_free_global();
|
|
|
|
if (info && (str = spa_dict_lookup(info, SPA_KEY_API_ALSA_PATH)))
|
|
snprintf(this->props.device, 64, "%s", str);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct spa_interface_info impl_interfaces[] = {
|
|
{SPA_TYPE_INTERFACE_Device,},
|
|
};
|
|
|
|
static int
|
|
impl_enum_interface_info(const struct spa_handle_factory *factory,
|
|
const struct spa_interface_info **info,
|
|
uint32_t *index)
|
|
{
|
|
spa_return_val_if_fail(factory != NULL, -EINVAL);
|
|
spa_return_val_if_fail(info != NULL, -EINVAL);
|
|
spa_return_val_if_fail(index != NULL, -EINVAL);
|
|
|
|
if (*index >= SPA_N_ELEMENTS(impl_interfaces))
|
|
return 0;
|
|
|
|
*info = &impl_interfaces[(*index)++];
|
|
return 1;
|
|
}
|
|
|
|
const struct spa_handle_factory spa_alsa_device_factory = {
|
|
SPA_VERSION_HANDLE_FACTORY,
|
|
SPA_NAME_API_ALSA_PCM_DEVICE,
|
|
NULL,
|
|
impl_get_size,
|
|
impl_init,
|
|
impl_enum_interface_info,
|
|
};
|