diff options
| -rw-r--r-- | include/sound/asound.h | 1 | ||||
| -rw-r--r-- | include/sound/pcm.h | 1 | ||||
| -rw-r--r-- | sound/core/pcm_lib.c | 19 | ||||
| -rw-r--r-- | sound/core/pcm_native.c | 15 |
4 files changed, 33 insertions, 3 deletions
diff --git a/include/sound/asound.h b/include/sound/asound.h index 6add80f..82aed3f 100644 --- a/include/sound/asound.h +++ b/include/sound/asound.h @@ -255,6 +255,7 @@ typedef int __bitwise snd_pcm_subformat_t; #define SNDRV_PCM_INFO_HALF_DUPLEX 0x00100000 /* only half duplex */ #define SNDRV_PCM_INFO_JOINT_DUPLEX 0x00200000 /* playback and capture stream are somewhat correlated */ #define SNDRV_PCM_INFO_SYNC_START 0x00400000 /* pcm support some kind of sync go */ +#define SNDRV_PCM_INFO_FIFO_IN_FRAMES 0x80000000 /* internal kernel flag - FIFO size is in frames */ typedef int __bitwise snd_pcm_state_t; #define SNDRV_PCM_STATE_OPEN ((__force snd_pcm_state_t) 0) /* stream is open */ diff --git a/include/sound/pcm.h b/include/sound/pcm.h index 267effd..8a69b5c 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -98,6 +98,7 @@ struct snd_pcm_ops { #define SNDRV_PCM_IOCTL1_INFO 1 #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 #define SNDRV_PCM_IOCTL1_GSTATE 3 +#define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 #define SNDRV_PCM_TRIGGER_STOP 0 #define SNDRV_PCM_TRIGGER_START 1 diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index d659995..adc2b0b 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -1524,6 +1524,23 @@ static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, return 0; } +static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, + void *arg) +{ + struct snd_pcm_hw_params *params = arg; + snd_pcm_format_t format; + int channels, width; + + 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; + } + return 0; +} + /** * snd_pcm_lib_ioctl - a generic PCM ioctl callback * @substream: the pcm substream instance @@ -1545,6 +1562,8 @@ int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, return snd_pcm_lib_ioctl_reset(substream, arg); case SNDRV_PCM_IOCTL1_CHANNEL_INFO: return snd_pcm_lib_ioctl_channel_info(substream, arg); + case SNDRV_PCM_IOCTL1_FIFO_SIZE: + return snd_pcm_lib_ioctl_fifo_size(substream, arg); } return -ENXIO; } diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 45dc53f..84da3ba 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -312,9 +312,18 @@ int snd_pcm_hw_refine(struct snd_pcm_substream *substream, hw = &substream->runtime->hw; if (!params->info) - params->info = hw->info; - if (!params->fifo_size) - params->fifo_size = hw->fifo_size; + params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES; + if (!params->fifo_size) { + if (snd_mask_min(¶ms->masks[SNDRV_PCM_HW_PARAM_FORMAT]) == + snd_mask_max(¶ms->masks[SNDRV_PCM_HW_PARAM_FORMAT]) && + snd_mask_min(¶ms->masks[SNDRV_PCM_HW_PARAM_CHANNELS]) == + snd_mask_max(¶ms->masks[SNDRV_PCM_HW_PARAM_CHANNELS])) { + changed = substream->ops->ioctl(substream, + SNDRV_PCM_IOCTL1_FIFO_SIZE, params); + if (params < 0) + return changed; + } + } params->rmask = 0; return 0; } |
