linux-4.4.1/preallocate_pcm_pages()
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開始行:
*参照元 [#obe78bd3]
#backlinks
*説明 [#z0d9ae7b]
-パス: [[linux-4.4.1/sound/core/pcm_memory.c]]
-FIXME: これは何?
--説明
**引数 [#l1a5e6d1]
-struct snd_pcm_substream *substream
--
--[[linux-4.4.1/snd_pcm_substream]]
-size_t size
--
**返り値 [#u690817a]
-int
--
**参考 [#h8970f0b]
*実装 [#h9e03d3e]
/*
* try to allocate as the large pages as possible.
* stores the resultant memory size in *res_size.
*
* the minimum size is snd_minimum_buffer. it should be...
*/
static int preallocate_pcm_pages(struct snd_pcm_substrea...
{
struct snd_dma_buffer *dmab = &substream->dma_buffer;
size_t orig_size = size;
int err;
-
--[[linux-4.4.1/snd_dma_buffer]]
do {
if ((err = snd_dma_alloc_pages(dmab->dev.type, dmab->d...
size, dmab)) < 0) {
if (err != -ENOMEM)
return err; /* fatal error */
} else
return 0;
-
-dmab->dev は struct snd_dma_device 型
--[[linux-4.4.1/snd_dma_device]]
--[[linux-4.4.1/snd_dma_alloc_pages()]]
size >>= 1;
} while (size >= snd_minimum_buffer);
dmab->bytes = 0; /* tell error */
pr_warn("ALSA pcmC%dD%d%c,%d:%s: cannot preallocate for...
substream->pcm->card->number, substream->pcm->device,
substream->stream ? 'c' : 'p', substream->number,
substream->pcm->name, orig_size);
-
-substream->pcm は struct snd_pcm * 型
-substream->pcm->card は struct snd_card * 型
-substream->pcm->device は int 型
--[[linux-4.4.1/snd_pcm]]
--[[linux-4.4.1/snd_card]]
--[[linux-4.4.1/pr_warn()]]
return 0;
}
*コメント [#g68aa953]
終了行:
*参照元 [#obe78bd3]
#backlinks
*説明 [#z0d9ae7b]
-パス: [[linux-4.4.1/sound/core/pcm_memory.c]]
-FIXME: これは何?
--説明
**引数 [#l1a5e6d1]
-struct snd_pcm_substream *substream
--
--[[linux-4.4.1/snd_pcm_substream]]
-size_t size
--
**返り値 [#u690817a]
-int
--
**参考 [#h8970f0b]
*実装 [#h9e03d3e]
/*
* try to allocate as the large pages as possible.
* stores the resultant memory size in *res_size.
*
* the minimum size is snd_minimum_buffer. it should be...
*/
static int preallocate_pcm_pages(struct snd_pcm_substrea...
{
struct snd_dma_buffer *dmab = &substream->dma_buffer;
size_t orig_size = size;
int err;
-
--[[linux-4.4.1/snd_dma_buffer]]
do {
if ((err = snd_dma_alloc_pages(dmab->dev.type, dmab->d...
size, dmab)) < 0) {
if (err != -ENOMEM)
return err; /* fatal error */
} else
return 0;
-
-dmab->dev は struct snd_dma_device 型
--[[linux-4.4.1/snd_dma_device]]
--[[linux-4.4.1/snd_dma_alloc_pages()]]
size >>= 1;
} while (size >= snd_minimum_buffer);
dmab->bytes = 0; /* tell error */
pr_warn("ALSA pcmC%dD%d%c,%d:%s: cannot preallocate for...
substream->pcm->card->number, substream->pcm->device,
substream->stream ? 'c' : 'p', substream->number,
substream->pcm->name, orig_size);
-
-substream->pcm は struct snd_pcm * 型
-substream->pcm->card は struct snd_card * 型
-substream->pcm->device は int 型
--[[linux-4.4.1/snd_pcm]]
--[[linux-4.4.1/snd_card]]
--[[linux-4.4.1/pr_warn()]]
return 0;
}
*コメント [#g68aa953]
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