linux-2.6.33/snd_pcm_playback_ioctl1()
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開始行:
*参照元 [#r16e1b74]
#backlinks
*説明 [#x336be29]
-パス: [[linux-2.6.33/sound/core/pcm_native.c]]
-FIXME: これは何？
--説明
**引数 [#l29a6049]
-struct file *file
--
--[[linux-2.6.33/file]]
-struct snd_pcm_substream *substream
--
--[[linux-2.6.33/snd_pcm_substream]]
-unsigned int cmd
--
-void __user *arg
--
**返り値 [#jcc438c9]
-int
--
**参考 [#kc9d150b]
*実装 [#w6ef25a2]
static int snd_pcm_playback_ioctl1(struct file *file,
struct snd_pcm_substream *substream,
unsigned int cmd, void __user *arg)
{
if (snd_BUG_ON(!substream))
return -ENXIO;
if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PL...
return -EINVAL;
-
--[[linux-2.6.33/snd_BUG_ON()]]
-
--[[linux-2.6.33/SNDRV_PCM_STREAM_PLAYBACK]]
switch (cmd) {
case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
{
struct snd_xferi xferi;
struct snd_xferi __user *_xferi = arg;
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_sframes_t result;
-
--[[linux-2.6.33/SNDRV_PCM_IOCTL_WRITEI_FRAMES]]
-
--[[linux-2.6.33/snd_xferi]]
-
--[[linux-2.6.33/snd_pcm_runtime]]
-
--[[linux-2.6.33/snd_pcm_sframes_t]]
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
-
--runtime->status は snd_pcm_mmap_status 型のメンバ
--[[linux-2.6.33/snd_pcm_mmap_status]]
-
--[[linux-2.6.33/SNDRV_PCM_STATE_OPEN]]
if (put_user(0, &_xferi->result))
return -EFAULT;
if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
return -EFAULT;
-
--[[linux-2.6.33/put_user()]]
-
--[[linux-2.6.33/copy_from_user()]]
result = snd_pcm_lib_write(substream, xferi.buf, xferi...
__put_user(result, &_xferi->result);
-
--[[linux-2.6.33/snd_pcm_lib_write()]]
-
--[[linux-2.6.33/__put_user()]]
return result < 0 ? result : 0;
}
case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
{
struct snd_xfern xfern;
struct snd_xfern __user *_xfern = arg;
struct snd_pcm_runtime *runtime = substream->runtime;
void __user **bufs;
snd_pcm_sframes_t result;
-
--[[linux-2.6.33/SNDRV_PCM_IOCTL_WRITEN_FRAMES]]
-
--[[linux-2.6.33/snd_xfern]]
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
if (runtime->channels > 128)
return -EINVAL;
if (put_user(0, &_xfern->result))
return -EFAULT;
if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
return -EFAULT;
bufs = memdup_user(xfern.bufs,
sizeof(void *) * runtime->channels);
if (IS_ERR(bufs))
return PTR_ERR(bufs);
-
--[[linux-2.6.33/memdup_user()]]
-
--[[linux-2.6.33/IS_ERR()]]
-
--[[linux-2.6.33/PTR_ERR()]]
result = snd_pcm_lib_writev(substream, bufs, xfern.fra...
kfree(bufs);
__put_user(result, &_xfern->result);
-
--[[linux-2.6.33/snd_pcm_lib_writev()]]
-
--[[linux-2.6.33/kfree()]]
return result < 0 ? result : 0;
}
case SNDRV_PCM_IOCTL_REWIND:
{
snd_pcm_uframes_t frames;
snd_pcm_uframes_t __user *_frames = arg;
snd_pcm_sframes_t result;
-
--[[linux-2.6.33/SNDRV_PCM_IOCTL_REWIND]]
-
--[[linux-2.6.33/snd_pcm_uframes_t]]
if (get_user(frames, _frames))
return -EFAULT;
if (put_user(0, _frames))
return -EFAULT;
result = snd_pcm_playback_rewind(substream, frames);
__put_user(result, _frames);
-
--[[linux-2.6.33/snd_pcm_playback_rewind()]]
return result < 0 ? result : 0;
}
case SNDRV_PCM_IOCTL_FORWARD:
{
snd_pcm_uframes_t frames;
snd_pcm_uframes_t __user *_frames = arg;
snd_pcm_sframes_t result;
-
--[[linux-2.6.33/SNDRV_PCM_IOCTL_FORWARD]]
if (get_user(frames, _frames))
return -EFAULT;
if (put_user(0, _frames))
return -EFAULT;
result = snd_pcm_playback_forward(substream, frames);
__put_user(result, _frames);
-
--[[linux-2.6.33/snd_pcm_playback_forward()]]
return result < 0 ? result : 0;
}
}
return snd_pcm_common_ioctl1(file, substream, cmd, arg);
-
--[[linux-2.6.33/snd_pcm_common_ioctl1()]]
}
*コメント [#e770f748]
終了行:
*参照元 [#r16e1b74]
#backlinks
*説明 [#x336be29]
-パス: [[linux-2.6.33/sound/core/pcm_native.c]]
-FIXME: これは何？
--説明
**引数 [#l29a6049]
-struct file *file
--
--[[linux-2.6.33/file]]
-struct snd_pcm_substream *substream
--
--[[linux-2.6.33/snd_pcm_substream]]
-unsigned int cmd
--
-void __user *arg
--
**返り値 [#jcc438c9]
-int
--
**参考 [#kc9d150b]
*実装 [#w6ef25a2]
static int snd_pcm_playback_ioctl1(struct file *file,
struct snd_pcm_substream *substream,
unsigned int cmd, void __user *arg)
{
if (snd_BUG_ON(!substream))
return -ENXIO;
if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PL...
return -EINVAL;
-
--[[linux-2.6.33/snd_BUG_ON()]]
-
--[[linux-2.6.33/SNDRV_PCM_STREAM_PLAYBACK]]
switch (cmd) {
case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
{
struct snd_xferi xferi;
struct snd_xferi __user *_xferi = arg;
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_sframes_t result;
-
--[[linux-2.6.33/SNDRV_PCM_IOCTL_WRITEI_FRAMES]]
-
--[[linux-2.6.33/snd_xferi]]
-
--[[linux-2.6.33/snd_pcm_runtime]]
-
--[[linux-2.6.33/snd_pcm_sframes_t]]
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
-
--runtime->status は snd_pcm_mmap_status 型のメンバ
--[[linux-2.6.33/snd_pcm_mmap_status]]
-
--[[linux-2.6.33/SNDRV_PCM_STATE_OPEN]]
if (put_user(0, &_xferi->result))
return -EFAULT;
if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
return -EFAULT;
-
--[[linux-2.6.33/put_user()]]
-
--[[linux-2.6.33/copy_from_user()]]
result = snd_pcm_lib_write(substream, xferi.buf, xferi...
__put_user(result, &_xferi->result);
-
--[[linux-2.6.33/snd_pcm_lib_write()]]
-
--[[linux-2.6.33/__put_user()]]
return result < 0 ? result : 0;
}
case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
{
struct snd_xfern xfern;
struct snd_xfern __user *_xfern = arg;
struct snd_pcm_runtime *runtime = substream->runtime;
void __user **bufs;
snd_pcm_sframes_t result;
-
--[[linux-2.6.33/SNDRV_PCM_IOCTL_WRITEN_FRAMES]]
-
--[[linux-2.6.33/snd_xfern]]
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
if (runtime->channels > 128)
return -EINVAL;
if (put_user(0, &_xfern->result))
return -EFAULT;
if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
return -EFAULT;
bufs = memdup_user(xfern.bufs,
sizeof(void *) * runtime->channels);
if (IS_ERR(bufs))
return PTR_ERR(bufs);
-
--[[linux-2.6.33/memdup_user()]]
-
--[[linux-2.6.33/IS_ERR()]]
-
--[[linux-2.6.33/PTR_ERR()]]
result = snd_pcm_lib_writev(substream, bufs, xfern.fra...
kfree(bufs);
__put_user(result, &_xfern->result);
-
--[[linux-2.6.33/snd_pcm_lib_writev()]]
-
--[[linux-2.6.33/kfree()]]
return result < 0 ? result : 0;
}
case SNDRV_PCM_IOCTL_REWIND:
{
snd_pcm_uframes_t frames;
snd_pcm_uframes_t __user *_frames = arg;
snd_pcm_sframes_t result;
-
--[[linux-2.6.33/SNDRV_PCM_IOCTL_REWIND]]
-
--[[linux-2.6.33/snd_pcm_uframes_t]]
if (get_user(frames, _frames))
return -EFAULT;
if (put_user(0, _frames))
return -EFAULT;
result = snd_pcm_playback_rewind(substream, frames);
__put_user(result, _frames);
-
--[[linux-2.6.33/snd_pcm_playback_rewind()]]
return result < 0 ? result : 0;
}
case SNDRV_PCM_IOCTL_FORWARD:
{
snd_pcm_uframes_t frames;
snd_pcm_uframes_t __user *_frames = arg;
snd_pcm_sframes_t result;
-
--[[linux-2.6.33/SNDRV_PCM_IOCTL_FORWARD]]
if (get_user(frames, _frames))
return -EFAULT;
if (put_user(0, _frames))
return -EFAULT;
result = snd_pcm_playback_forward(substream, frames);
__put_user(result, _frames);
-
--[[linux-2.6.33/snd_pcm_playback_forward()]]
return result < 0 ? result : 0;
}
}
return snd_pcm_common_ioctl1(file, substream, cmd, arg);
-
--[[linux-2.6.33/snd_pcm_common_ioctl1()]]
}
*コメント [#e770f748]
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