From 0ed2bf5ca517ba1e4cab3b5978c4b3aee12fbb1c Mon Sep 17 00:00:00 2001
From: Ralph Ronnquist <ralph.ronnquist@gmail.com>
Date: Wed, 26 Apr 2023 22:44:36 +1000
Subject: [PATCH] Add imports for simple playback access.

---
 lsp-alsa/libasound-pcm.lsp | 71 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/lsp-alsa/libasound-pcm.lsp b/lsp-alsa/libasound-pcm.lsp
index 7862b1c..3ccb827 100644
--- a/lsp-alsa/libasound-pcm.lsp
+++ b/lsp-alsa/libasound-pcm.lsp
@@ -6,6 +6,11 @@
  'SND_PCM_NONBLOCK 0x00000001
  ;; Async notification
  'SND_PCM_ASYNC    0x00000002
+ ;; enum _snd_pcm_format (some)
+ 'SND_PCM_FORMAT_S16_LE 2
+ ;; enum _snd_pcm_access (some)
+ 'SND_PCM_ACCESS_RW_INTERLEAVED 3
+ 'SND_PCM_ACCESS_RW_NONINTERLEAVED 4
  )
 
 (import LIB "snd_pcm_open" "int"
@@ -15,4 +20,70 @@
         "int"   ; int mode
         )
 
+(import LIB "snd_pcm_writei" "long" ; snd_pcm_uframes_t 
+	"void*" ; snd_pcm_t *pcm
+        "void*" ; const void *buffer
+        "long"   ; snd_pcm_uframes_t size
+        )
+
+(import LIB "snd_pcm_prepare" "int" ; int
+	"void*" ; snd_pcm_t *pcm
+        )
+
+(import LIB "snd_pcm_start" "int" ; int
+	"void*" ; snd_pcm_t *pcm
+        )
+
+;;typedef struct _snd_pcm_hw_params snd_pcm_hw_params_t
+#      "unsigned" ; unsigned int flags;
+#      struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
+#                             SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
+#      struct snd_mask mres[5];        /* reserved masks */
+#      struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
+#                                      SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
+#      struct snd_interval ires[9];    /* reserved intervals */
+#      unsigned int rmask;             /* W: requested masks */
+#      unsigned int cmask;             /* R: changed masks */
+#      unsigned int info;              /* R: Info flags for returned setup */
+#      unsigned int msbits;            /* R: used most significant bits */
+#      unsigned int rate_num;          /* R: rate numerator */
+#      unsigned int rate_den;          /* R: rate denominator */
+#      snd_pcm_uframes_t fifo_size;    /* R: chip FIFO size in frames */
+#      unsigned char reserved[64];     /* reserved for future */
+
+#(import LIB "snd_pcm_hw_params_current" "int"
+#	"void*" ; snd_pcm_t *pcm
+#        "void*" ; snd_pcm_hw_params_t *params
+#        )
+
+(import LIB "snd_pcm_state" "int" ; snd_pcm_state_t snd_pcm_state
+	"void*" ; snd_pcm_t *pcm
+        )
+
+(import LIB "snd_pcm_start" "int" ; snd_pcm_state_t snd_pcm_start
+	"void*" ; snd_pcm_t *pcm
+        )
+
+(import LIB "snd_pcm_wait" "int"
+	"void*" ; snd_pcm_t *pcm
+        "int"   ; int timeout 
+        )
+
+(import LIB "snd_pcm_set_params" "int"
+        "void*" ; snd_pcm_t *pcm
+        "int"   ; snd_pcm_format_t format
+        "int"   ; snd_pcm_access_t access
+        "unsigned int" ; unsigned int channels
+        "unsigned int" ; unsigned int rate
+        "int"   ;int soft_resample
+        "unsigned int" ; unsigned int latency
+        )
+
+(import LIB "snd_pcm_drain" "int"
+        "void*" ; snd_pcm_t *pcm
+        )
+
+(import LIB "snd_pcm_close" "int"
+        "void*" ; snd_pcm_t *pcm
+        )
 
-- 
2.39.2