Exemplos de snd_compr_write_data em C++ (Cpp)

Exemplo n.º 1

Arquivo: compress_offload.c Projeto: ratsbu11/android_kernel_asus_zenfone5

static ssize_t snd_compr_write(struct file *f, const char __user *buf,
		size_t count, loff_t *offset)
{
	struct snd_compr_file *data = f->private_data;
	struct snd_compr_stream *stream;
	size_t avail;
	int retval = 0;

	if (snd_BUG_ON(!data))
		return -EFAULT;

	stream = &data->stream;
	mutex_lock(&stream->device->lock);
	 /*
	 * if the stream is in paused state, return the
	 * number of bytes consumed as 0
	 */
	if (stream->runtime->state == SNDRV_PCM_STATE_PAUSED) {
		mutex_unlock(&stream->device->lock);
		return retval;
	}
	/* write is allowed when stream is running or prepared or in setup */
	if (stream->runtime->state != SNDRV_PCM_STATE_SETUP &&
			stream->runtime->state != SNDRV_PCM_STATE_RUNNING &&
			stream->runtime->state != SNDRV_PCM_STATE_PREPARED) {
		mutex_unlock(&stream->device->lock);
		return -EBADFD;
	}

	avail = snd_compr_get_avail(stream);
	pr_debug("avail returned %ld\n", (unsigned long)avail);
	/* calculate how much we can write to buffer */
	if (avail > count)
		avail = count;

	if (stream->ops->copy) {
		char __user* cbuf = (char __user*)buf;
		retval = stream->ops->copy(stream, cbuf, avail);
	} else {
		retval = snd_compr_write_data(stream, buf, avail);
	}
	if (retval > 0)
		stream->runtime->total_bytes_available += retval;

	/* while initiating the stream, write should be called before START
	 * call, so in setup move state */
	if (stream->runtime->state == SNDRV_PCM_STATE_SETUP) {
		stream->runtime->state = SNDRV_PCM_STATE_PREPARED;
		pr_debug("stream prepared, Houston we are good to go\n");
	}

	mutex_unlock(&stream->device->lock);
	return retval;
}

Exemplo n.º 2

Arquivo: compress_offload.c Projeto: jiugui1/kernel-mm-m8

static ssize_t snd_compr_write(struct file *f, const char __user *buf,
		size_t count, loff_t *offset)
{
	struct snd_compr_file *data = f->private_data;
	struct snd_compr_stream *stream;
	size_t avail;
	int retval;

	if (snd_BUG_ON(!data))
		return -EFAULT;

	stream = &data->stream;
	mutex_lock(&stream->device->lock);
	
	if (stream->runtime->state != SNDRV_PCM_STATE_SETUP &&
			stream->runtime->state != SNDRV_PCM_STATE_RUNNING) {
		mutex_unlock(&stream->device->lock);
		return -EBADFD;
	}

	avail = snd_compr_get_avail(stream);
	pr_debug("avail returned %zu\n", avail);
	/* calculate how much we can write to buffer */
	if (avail > count)
		avail = count;

	if (stream->ops->copy) {
		char __user* cbuf = (char __user*)buf;
		retval = stream->ops->copy(stream, cbuf, avail);
	} else {
		retval = snd_compr_write_data(stream, buf, avail);
	}
	if (retval > 0)
		stream->runtime->total_bytes_available += retval;

	if (stream->runtime->state == SNDRV_PCM_STATE_SETUP) {
		stream->runtime->state = SNDRV_PCM_STATE_PREPARED;
		pr_debug("stream prepared, Houston we are good to go\n");
	}

	mutex_unlock(&stream->device->lock);
	return retval;
}