void * iio_buffer_first(const struct iio_buffer *buffer,
const struct iio_channel *chn)
{
size_t len;
unsigned int i;
uintptr_t ptr = (uintptr_t) buffer->buffer;
if (!iio_channel_is_enabled(chn))
return iio_buffer_end(buffer);
for (i = 0; i < buffer->dev->nb_channels; i++) {
struct iio_channel *cur = buffer->dev->channels[i];
len = cur->format.length / 8;
/* NOTE: dev->channels are ordered by index */
if (cur->index < 0 || cur->index == chn->index)
break;
/* Test if the buffer has samples for this channel */
if (!TEST_BIT(buffer->mask, cur->index))
continue;
if (ptr % len)
ptr += len - (ptr % len);
ptr += len;
}
len = chn->format.length / 8;
if (ptr % len)
ptr += len - (ptr % len);
return (void *) ptr;
}
bool iio_device_is_tx(const struct iio_device *dev)
{
unsigned int i;
for (i = 0; i < dev->nb_channels; i++) {
struct iio_channel *ch = dev->channels[i];
if (iio_channel_is_output(ch) && iio_channel_is_enabled(ch))
return true;
}
return false;
}