[ALSA] Use posix clock monotonic for PCM and timer timestamps

[linux-2.6] / include / sound / pcm.h

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index ec006ed8cd59100c6c0710a9ec7cb19061837d24..65f636223d392890283e16df109aea34ade635ce 100644 (file)
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -3,7 +3,7 @@
 
 /*
  *  Digital Audio (PCM) abstract layer
- *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  *                   Abramo Bagnara <abramo@alsa-project.org>
  *
  *
@@ -56,6 +56,8 @@ struct snd_pcm_hardware {
        size_t fifo_size;               /* fifo size in bytes */
 };
 
+struct snd_pcm_substream;
+
 struct snd_pcm_ops {
        int (*open)(struct snd_pcm_substream *substream);
        int (*close)(struct snd_pcm_substream *substream);
@@ -299,8 +301,8 @@ struct snd_pcm_runtime {
        union snd_pcm_sync_id sync;     /* hardware synchronization ID */
 
        /* -- mmap -- */
-       volatile struct snd_pcm_mmap_status *status;
-       volatile struct snd_pcm_mmap_control *control;
+       struct snd_pcm_mmap_status *status;
+       struct snd_pcm_mmap_control *control;
 
        /* -- locking / scheduling -- */
        wait_queue_head_t sleep;
@@ -321,6 +323,7 @@ struct snd_pcm_runtime {
 
        /* -- timer -- */
        unsigned int timer_resolution;  /* timer resolution */
+       int tstamp_type;                /* timestamp type */
 
        /* -- DMA -- */           
        unsigned char *dma_area;        /* DMA area */
@@ -445,7 +448,7 @@ struct snd_pcm_notify {
  *  Registering
  */
 
-extern struct file_operations snd_pcm_f_ops[2];
+extern const struct file_operations snd_pcm_f_ops[2];
 
 int snd_pcm_new(struct snd_card *card, char *id, int device,
                int playback_count, int capture_count,
@@ -601,11 +604,8 @@ do { \
        read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
 } while (0)
 
-#define snd_pcm_group_for_each(pos, substream) \
-       list_for_each(pos, &substream->group->substreams)
-
-#define snd_pcm_group_substream_entry(pos) \
-       list_entry(pos, struct snd_pcm_substream, link_list)
+#define snd_pcm_group_for_each_entry(s, substream) \
+       list_for_each_entry(s, &substream->group->substreams, link_list)
 
 static inline int snd_pcm_running(struct snd_pcm_substream *substream)
 {
@@ -792,13 +792,13 @@ static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *p
 static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
                                             snd_pcm_hw_param_t var)
 {
-       return (const struct snd_mask *)hw_param_mask((struct snd_pcm_hw_params*) params, var);
+       return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
 }
 
 static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
                                                     snd_pcm_hw_param_t var)
 {
-       return (const struct snd_interval *)hw_param_interval((struct snd_pcm_hw_params*) params, var);
+       return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
 }
 
 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
@@ -923,7 +923,10 @@ snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
 snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
                                    void __user **bufs, snd_pcm_uframes_t frames);
 
+extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
+
 int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
+unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
 
 static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
                                              struct snd_dma_buffer *bufp)
@@ -950,6 +953,15 @@ void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
 void snd_pcm_timer_init(struct snd_pcm_substream *substream);
 void snd_pcm_timer_done(struct snd_pcm_substream *substream);
 
+static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
+                                  struct timespec *tv)
+{
+       if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
+               do_posix_clock_monotonic_gettime(tv);
+       else
+               getnstimeofday(tv);
+}
+
 /*
  *  Memory
  */