C++ (Cpp) preallocate_pcm_pages Examples

Example #1

File: pcm_memory.c Project: Dronevery/JetsonTK1-kernel

/*
 * pre-allocate the buffer and create a proc file for the substream
 */
static int snd_pcm_lib_preallocate_pages1(snd_pcm_substream_t *substream,
					  size_t size, size_t max)
{
	snd_info_entry_t *entry;

	if (size > 0 && preallocate_dma && substream->number < maximum_substreams)
		preallocate_pcm_pages(substream, size);

	if (substream->dma_buffer.bytes > 0)
		substream->buffer_bytes_max = substream->dma_buffer.bytes;
	substream->dma_max = max;
	if ((entry = snd_info_create_card_entry(substream->pcm->card, "prealloc", substream->proc_root)) != NULL) {
		entry->c.text.read_size = 64;
		entry->c.text.read = snd_pcm_lib_preallocate_proc_read;
		entry->c.text.write_size = 64;
		entry->c.text.write = snd_pcm_lib_preallocate_proc_write;
		entry->private_data = substream;
		if (snd_info_register(entry) < 0) {
			snd_info_free_entry(entry);
			entry = NULL;
		}
	}
	substream->proc_prealloc_entry = entry;
	return 0;
}

Example #2

File: pcm_memory.c Project: AlexShiLucky/linux

/*
 * pre-allocate the buffer and create a proc file for the substream
 */
static int snd_pcm_lib_preallocate_pages1(struct snd_pcm_substream *substream,
					  size_t size, size_t max)
{

	if (size > 0 && preallocate_dma && substream->number < maximum_substreams)
		preallocate_pcm_pages(substream, size);

	if (substream->dma_buffer.bytes > 0)
		substream->buffer_bytes_max = substream->dma_buffer.bytes;
	substream->dma_max = max;
	preallocate_info_init(substream);
	return 0;
}