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-rw-r--r--include/sound/pcm_oss.h75
1 files changed, 75 insertions, 0 deletions
diff --git a/include/sound/pcm_oss.h b/include/sound/pcm_oss.h
new file mode 100644
index 000000000..c96f23c77
--- /dev/null
+++ b/include/sound/pcm_oss.h
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __SOUND_PCM_OSS_H
+#define __SOUND_PCM_OSS_H
+
+/*
+ * Digital Audio (PCM) - OSS compatibility abstract layer
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ */
+
+struct snd_pcm_oss_setup {
+ char *task_name;
+ unsigned int disable:1,
+ direct:1,
+ block:1,
+ nonblock:1,
+ partialfrag:1,
+ nosilence:1,
+ buggyptr:1;
+ unsigned int periods;
+ unsigned int period_size;
+ struct snd_pcm_oss_setup *next;
+};
+
+struct snd_pcm_oss_runtime {
+ unsigned params: 1, /* format/parameter change */
+ prepare: 1, /* need to prepare the operation */
+ trigger: 1, /* trigger flag */
+ sync_trigger: 1; /* sync trigger flag */
+ int rate; /* requested rate */
+ int format; /* requested OSS format */
+ unsigned int channels; /* requested channels */
+ unsigned int fragshift;
+ unsigned int maxfrags;
+ unsigned int subdivision; /* requested subdivision */
+ size_t period_bytes; /* requested period size */
+ size_t period_frames; /* period frames for poll */
+ size_t period_ptr; /* actual write pointer to period */
+ unsigned int periods;
+ size_t buffer_bytes; /* requested buffer size */
+ size_t bytes; /* total # bytes processed */
+ size_t mmap_bytes;
+ char *buffer; /* vmallocated period */
+ size_t buffer_used; /* used length from period buffer */
+ struct mutex params_lock;
+ atomic_t rw_ref; /* concurrent read/write accesses */
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+ struct snd_pcm_plugin *plugin_first;
+ struct snd_pcm_plugin *plugin_last;
+#endif
+ unsigned int prev_hw_ptr_period;
+};
+
+struct snd_pcm_oss_file {
+ struct snd_pcm_substream *streams[2];
+};
+
+struct snd_pcm_oss_substream {
+ unsigned oss: 1; /* oss mode */
+ struct snd_pcm_oss_setup setup; /* active setup */
+};
+
+struct snd_pcm_oss_stream {
+ struct snd_pcm_oss_setup *setup_list; /* setup list */
+ struct mutex setup_mutex;
+#ifdef CONFIG_SND_VERBOSE_PROCFS
+ struct snd_info_entry *proc_entry;
+#endif
+};
+
+struct snd_pcm_oss {
+ int reg;
+ unsigned int reg_mask;
+};
+
+#endif /* __SOUND_PCM_OSS_H */