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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/id-map.h>
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#include <spa/log.h>
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#include <spa/list.h>
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#include <spa/node.h>
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#include <spa/ringbuffer.h>
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#include <spa/audio/format.h>
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typedef struct _SpaALSAState SpaALSAState;
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typedef struct _SpaALSABuffer SpaALSABuffer;
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typedef struct {
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SpaProps 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 buffer_time;
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uint32_t period_time;
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bool period_event;
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} SpaALSAProps;
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#define MAX_BUFFERS 64
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struct _SpaALSABuffer {
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SpaBuffer *outbuf;
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SpaMetaHeader *h;
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SpaMetaRingbuffer *rb;
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bool outstanding;
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SpaList list;
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};
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typedef struct {
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uint32_t node;
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uint32_t clock;
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} URI;
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struct _SpaALSAState {
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SpaHandle handle;
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SpaNode node;
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SpaClock clock;
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uint32_t seq;
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URI uri;
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SpaIDMap *map;
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SpaLog *log;
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SpaPoll *main_loop;
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SpaPoll *data_loop;
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snd_pcm_stream_t stream;
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snd_output_t *output;
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SpaNodeEventCallback event_cb;
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void *user_data;
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SpaALSAProps props[2];
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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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SpaFormatAudio query_format;
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SpaFormatAudio current_format;
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snd_pcm_sframes_t buffer_frames;
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snd_pcm_sframes_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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SpaPortInfo info;
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SpaAllocParam *params[3];
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SpaAllocParamBuffers param_buffers;
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SpaAllocParamMetaEnable param_meta;
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SpaAllocParamMetaEnableRingbuffer param_meta_rb;
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void *io;
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SpaALSABuffer buffers[MAX_BUFFERS];
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unsigned int n_buffers;
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bool use_ringbuffer;
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SpaALSABuffer *ringbuffer;
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SpaList free;
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SpaList ready;
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size_t ready_offset;
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bool started;
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SpaPollFd fds[16];
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SpaPollItem poll;
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int64_t sample_count;
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int64_t last_ticks;
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int64_t last_monotonic;
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};
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int spa_alsa_set_format (SpaALSAState *state,
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SpaFormatAudio *fmt,
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SpaPortFormatFlags flags);
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SpaResult spa_alsa_start (SpaALSAState *state, bool xrun_recover);
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SpaResult spa_alsa_pause (SpaALSAState *state, bool xrun_recover);
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SpaResult spa_alsa_close (SpaALSAState *state);
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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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