diff options
Diffstat (limited to 'sound/core/pcm_lib.c')
-rw-r--r-- | sound/core/pcm_lib.c | 55 |
1 files changed, 43 insertions, 12 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index 397d9ad..7f00d34 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -23,6 +23,7 @@ #include <linux/slab.h> #include <linux/time.h> #include <linux/math64.h> +#include <linux/export.h> #include <sound/core.h> #include <sound/control.h> #include <sound/info.h> @@ -128,7 +129,8 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram } } -static void pcm_debug_name(struct snd_pcm_substream *substream, +#ifdef CONFIG_SND_DEBUG +void snd_pcm_debug_name(struct snd_pcm_substream *substream, char *name, size_t len) { snprintf(name, len, "pcmC%dD%d%c:%d", @@ -137,6 +139,8 @@ static void pcm_debug_name(struct snd_pcm_substream *substream, substream->stream ? 'c' : 'p', substream->number); } +EXPORT_SYMBOL(snd_pcm_debug_name); +#endif #define XRUN_DEBUG_BASIC (1<<0) #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ @@ -168,7 +172,7 @@ static void xrun(struct snd_pcm_substream *substream) snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { char name[16]; - pcm_debug_name(substream, name, sizeof(name)); + snd_pcm_debug_name(substream, name, sizeof(name)); snd_printd(KERN_DEBUG "XRUN: %s\n", name); dump_stack_on_xrun(substream); } @@ -243,7 +247,7 @@ static void xrun_log_show(struct snd_pcm_substream *substream) return; if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) return; - pcm_debug_name(substream, name, sizeof(name)); + snd_pcm_debug_name(substream, name, sizeof(name)); for (cnt = 0, idx = log->idx; cnt < XRUN_LOG_CNT; cnt++) { entry = &log->entries[idx]; if (entry->period_size == 0) @@ -319,7 +323,7 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, if (pos >= runtime->buffer_size) { if (printk_ratelimit()) { char name[16]; - pcm_debug_name(substream, name, sizeof(name)); + snd_pcm_debug_name(substream, name, sizeof(name)); xrun_log_show(substream); snd_printd(KERN_ERR "BUG: %s, pos = %ld, " "buffer size = %ld, period size = %ld\n", @@ -364,7 +368,7 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, if (xrun_debug(substream, in_interrupt ? XRUN_DEBUG_PERIODUPDATE : XRUN_DEBUG_HWPTRUPDATE)) { char name[16]; - pcm_debug_name(substream, name, sizeof(name)); + snd_pcm_debug_name(substream, name, sizeof(name)); snd_printd("%s_update: %s: pos=%u/%u/%u, " "hwptr=%ld/%ld/%ld/%ld\n", in_interrupt ? "period" : "hwptr", @@ -1396,6 +1400,32 @@ int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); +static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) +{ + unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; + struct snd_interval *rate; + + rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); + return snd_interval_list(rate, 1, &base_rate, 0); +} + +/** + * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling + * @runtime: PCM runtime instance + * @base_rate: the rate at which the hardware does not resample + */ +int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, + unsigned int base_rate) +{ + return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, + SNDRV_PCM_HW_PARAM_RATE, + snd_pcm_hw_rule_noresample_func, + (void *)(uintptr_t)base_rate, + SNDRV_PCM_HW_PARAM_RATE, -1); +} +EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); + static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { @@ -1662,14 +1692,16 @@ static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, { struct snd_pcm_hw_params *params = arg; snd_pcm_format_t format; - int channels, width; + int channels; + ssize_t frame_size; params->fifo_size = substream->runtime->hw.fifo_size; if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { format = params_format(params); channels = params_channels(params); - width = snd_pcm_format_physical_width(format); - params->fifo_size /= width * channels; + frame_size = snd_pcm_format_size(format, channels); + if (frame_size > 0) + params->fifo_size /= (unsigned)frame_size; } return 0; } @@ -1765,10 +1797,7 @@ static int wait_for_avail(struct snd_pcm_substream *substream, if (runtime->no_period_wakeup) wait_time = MAX_SCHEDULE_TIMEOUT; else { - if (substream->pcm->card->number != 0) - wait_time = 1; - else - wait_time = 10; + wait_time = 10; if (runtime->rate) { long t = runtime->period_size * 2 / runtime->rate; wait_time = max(t, wait_time); @@ -1819,6 +1848,8 @@ static int wait_for_avail(struct snd_pcm_substream *substream, case SNDRV_PCM_STATE_DISCONNECTED: err = -EBADFD; goto _endloop; + case SNDRV_PCM_STATE_PAUSED: + continue; } if (!tout) { snd_printd("%s write error (DMA or IRQ trouble?)\n", |