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| author | Takashi Iwai <tiwai@suse.de> | 2006-04-28 15:13:41 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2006-06-22 21:33:13 +0200 |
| commit | 0df63e44c3e315ec0fe427ae62558231864108bd (patch) | |
| tree | 3cff6f5d5fdb7ad047a61c591d891e3ca1bc669e /sound/core/oss | |
| parent | f001c3acf64b8ca18fe40af592629abb261b321e (diff) | |
| download | linux-0df63e44c3e315ec0fe427ae62558231864108bd.tar.gz linux-0df63e44c3e315ec0fe427ae62558231864108bd.tar.bz2 linux-0df63e44c3e315ec0fe427ae62558231864108bd.zip | |
[ALSA] Add O_APPEND flag support to PCM
Added O_APPEND flag support to PCM to enable shared substreams
among multiple processes. This mechanism is used by dmix and
dsnoop plugins.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/oss')
| -rw-r--r-- | sound/core/oss/pcm_oss.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c index d8b7416ee003..9803a6ce3d46 100644 --- a/sound/core/oss/pcm_oss.c +++ b/sound/core/oss/pcm_oss.c @@ -1331,7 +1331,7 @@ static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const cha if (runtime->oss.period_ptr == 0 || runtime->oss.period_ptr == runtime->oss.buffer_used) runtime->oss.buffer_used = 0; - else if ((substream->ffile->f_flags & O_NONBLOCK) != 0) + else if ((substream->f_flags & O_NONBLOCK) != 0) return xfer > 0 ? xfer : -EAGAIN; } } else { @@ -1344,7 +1344,7 @@ static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const cha buf += tmp; bytes -= tmp; xfer += tmp; - if ((substream->ffile->f_flags & O_NONBLOCK) != 0 && + if ((substream->f_flags & O_NONBLOCK) != 0 && tmp != runtime->oss.period_bytes) break; } @@ -1582,10 +1582,10 @@ static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) * finish sync: drain the buffer */ __direct: - saved_f_flags = substream->ffile->f_flags; - substream->ffile->f_flags &= ~O_NONBLOCK; + saved_f_flags = substream->f_flags; + substream->f_flags &= ~O_NONBLOCK; err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); - substream->ffile->f_flags = saved_f_flags; + substream->f_flags = saved_f_flags; if (err < 0) return err; runtime->oss.prepare = 1; @@ -2164,9 +2164,9 @@ static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, substream->oss.oss = 1; substream->oss.setup = *setup; if (setup->nonblock) - substream->ffile->f_flags |= O_NONBLOCK; + substream->f_flags |= O_NONBLOCK; else if (setup->block) - substream->ffile->f_flags &= ~O_NONBLOCK; + substream->f_flags &= ~O_NONBLOCK; runtime = substream->runtime; runtime->oss.params = 1; runtime->oss.trigger = 1; @@ -2223,6 +2223,7 @@ static int snd_pcm_oss_open_file(struct file *file, (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) f_mode = FMODE_WRITE; + file->f_flags &= ~O_APPEND; for (idx = 0; idx < 2; idx++) { if (setup[idx].disable) continue; @@ -2540,6 +2541,7 @@ static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t coun substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; if (substream == NULL) return -ENXIO; + substream->f_flags = file->f_flags & O_NONBLOCK; #ifndef OSS_DEBUG return snd_pcm_oss_read1(substream, buf, count); #else @@ -2561,6 +2563,7 @@ static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; if (substream == NULL) return -ENXIO; + substream->f_flags = file->f_flags & O_NONBLOCK; result = snd_pcm_oss_write1(substream, buf, count); #ifdef OSS_DEBUG printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result); |