mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-11-03 09:01:54 -05:00
c9526dc2bb
spa_io_control_range -> spa_io_range Add helpers for sequence and control pod objects Implement control properties in audiotestsrc, update test example.
137 lines
3 KiB
C
137 lines
3 KiB
C
/* Spa ALSA Sink
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* Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __SPA_ALSA_UTILS_H__
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#define __SPA_ALSA_UTILS_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stddef.h>
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#include <asoundlib.h>
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#include <spa/support/loop.h>
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#include <spa/support/log.h>
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#include <spa/utils/list.h>
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#include <spa/node/node.h>
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#include <spa/node/io.h>
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#include <spa/param/param.h>
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#include <spa/param/audio/format-utils.h>
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#define DEFAULT_RATE 48000
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#define DEFAULT_CHANNELS 2
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struct props {
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char device[64];
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char device_name[128];
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char card_name[128];
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uint32_t min_latency;
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uint32_t max_latency;
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};
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#define MAX_BUFFERS 32
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struct buffer {
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struct spa_buffer *buf;
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struct spa_meta_header *h;
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#define BUFFER_FLAG_OUT (1<<0)
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uint32_t flags;
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struct spa_list link;
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};
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struct state {
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struct spa_handle handle;
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struct spa_node node;
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uint32_t seq;
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struct spa_log *log;
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struct spa_loop *main_loop;
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struct spa_loop *data_loop;
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snd_pcm_stream_t stream;
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snd_output_t *output;
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const struct spa_node_callbacks *callbacks;
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void *callbacks_data;
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struct props props;
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bool opened;
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snd_pcm_t *hndl;
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bool have_format;
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struct spa_audio_info current_format;
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snd_pcm_uframes_t buffer_frames;
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snd_pcm_uframes_t period_frames;
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snd_pcm_format_t format;
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int rate;
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int channels;
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size_t frame_size;
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struct spa_port_info info;
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struct spa_io_buffers *io;
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struct spa_io_range *range;
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struct spa_io_clock *clock;
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struct buffer buffers[MAX_BUFFERS];
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unsigned int n_buffers;
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struct spa_list free;
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struct spa_list ready;
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size_t ready_offset;
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bool started;
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struct spa_source source;
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int timerfd;
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bool alsa_started;
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int threshold;
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snd_htimestamp_t now;
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int64_t sample_count;
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int64_t filled;
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uint64_t underrun;
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};
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int
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spa_alsa_enum_format(struct state *state,
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uint32_t *index,
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const struct spa_pod *filter,
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struct spa_pod **result,
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struct spa_pod_builder *builder);
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int spa_alsa_set_format(struct state *state, struct spa_audio_info *info, uint32_t flags);
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int spa_alsa_start(struct state *state, bool xrun_recover);
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int spa_alsa_pause(struct state *state, bool xrun_recover);
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int spa_alsa_close(struct state *state);
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int spa_alsa_write(struct state *state, snd_pcm_uframes_t silence);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* __SPA_ALSA_UTILS_H__ */
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