Esempio n. 1
0
static void snd_bcm2835_pcm_transfer(struct snd_pcm_substream *substream,
	struct snd_pcm_indirect *rec, size_t bytes)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct bcm2835_alsa_stream *alsa_stream = runtime->private_data;
	void *src = (void *) (substream->runtime->dma_area + rec->sw_data);
	int err;

	err = bcm2835_audio_write(alsa_stream, bytes, src);
	if (err)
		audio_error(" Failed to transfer to alsa device (%d)\n", err);

}
Esempio n. 2
0
static int snd_bcm2835_pcm_copy(struct snd_pcm_substream *substream,
				int channel, snd_pcm_uframes_t pos, void *src,
				snd_pcm_uframes_t count)
{
	int ret;
	struct snd_pcm_runtime *runtime = substream->runtime;
	bcm2835_alsa_stream_t *alsa_stream = runtime->private_data;

	audio_info(" .. IN\n");
	audio_debug("copy.......... (%d) hwptr=%d appl=%d pos=%d\n",
		      frames_to_bytes(runtime, count), frames_to_bytes(runtime,
								       runtime->
								       status->
								       hw_ptr),
		      frames_to_bytes(runtime, runtime->control->appl_ptr),
		      alsa_stream->pos);
	ret =
	    bcm2835_audio_write(alsa_stream, frames_to_bytes(runtime, count),
				src);
	audio_info(" .. OUT\n");
	return ret;
}