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Misc bugfixes while integrating fast forward by sub-sampling

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This commit is contained in:
Gregory Nutt 2014-07-27 19:32:07 -06:00
parent c9f15ffd3d
commit f235f95e52
2 changed files with 28 additions and 11 deletions
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25
audio/pcm_decode.c
View File

@ -127,6 +127,12 @@ struct pcm_decode_s
uint8_t skip; /* Number of samples to be skipped */
uint8_t npartial; /* Size of the partial sample */
uint8_t partial[4]; /* Holds the partial sample */
/* REVISIT: I think we could get rid of all of this special buffer
* processing. It seems like we should be able to do the sub-sampling
* in place without any additional buffers.
*/
struct audio_buf_desc_s bufdesc; /* Allocated buffer description */
FAR struct ap_buffer_s *ffwd; /* Audio buffer being subsampled into */
FAR struct ap_buffer_s *next; /* Next available, empty audio buffer */
@ -518,7 +524,12 @@ static int pcm_subsample_configure(FAR struct pcm_decode_s *priv,
* driver.
*/
audvdbg("Start subsampling: apb=%p\n", priv->apb);
audvdbg("Start subsampling: apb=%p\n", priv->apb);
/* REVISIT: I think we could get rid of this special buffer. It
* seems like we should be able to do the sub-sampling in place
* without any additional buffers.
*/
if (priv->apb == NULL)
{
@ -950,7 +961,7 @@ static FAR struct ap_buffer_s *pcm_subsample(FAR struct pcm_decode_s *priv,
* is the case?
*
* REVISIT: Should there be a threshold here so that we do not send
* really tiny buffers to the
* really tiny buffers to the lower-level driver.
*/
if (srcsize > 0)
@ -1049,7 +1060,7 @@ exit_apb_empty:
/* Is there anything in the working buffer?
*
* REVISIT: Should there be a threshold here so that we do not send
* really tiny buffers to the
* really tiny buffers to the lower-level driver.
*/
if (work->nbytes > 0)
@ -1444,6 +1455,8 @@ static int pcm_enqueuebuffer(FAR struct audio_lowerhalf_s *dev,
lower = priv->lower;
DEBUGASSERT(lower && lower->ops->enqueuebuffer && lower->ops->configure);
apb->curbyte = 0;
/* Are we streaming yet? */
if (priv->streaming)
@ -1467,6 +1480,8 @@ static int pcm_enqueuebuffer(FAR struct audio_lowerhalf_s *dev,
return lower->ops->enqueuebuffer(lower, apb);
}
return OK;
}
/* No.. then this must be the first buffer that we have seen (since we
@ -1536,6 +1551,8 @@ static int pcm_enqueuebuffer(FAR struct audio_lowerhalf_s *dev,
return lower->ops->enqueuebuffer(lower, apb);
}
return OK;
}
}
@ -1737,7 +1754,7 @@ static void pcm_callback(FAR void *arg, uint16_t reason,
FAR struct pcm_decode_s *priv = (FAR struct pcm_decode_s *)arg;
#ifndef CONFIG_AUDIO_EXCLUDE_FFORWARD
/* If this is our internal working audio buffer that we use for subsampling,
/* If this is our internal working audio buffer that we use for sub-sampling,
* then we are the owner of the buffer and we don't want to return it to
* the upper level.
*/

2
include/nuttx/audio/audio.h
View File

@ -198,7 +198,7 @@
#define AUDIO_SUBSAMPLE_NONE 0
#define AUDIO_SUBSAMPLE_2X 2
#define AUDIO_SUBSAMPLE_4X 4
#define AUDIO_SUBSAMPLE_8X 5
#define AUDIO_SUBSAMPLE_8X 8
#define AUDIO_SUBSAMPLE_16X 16
#define AUDIO_SUBSAMPLE_MIN AUDIO_SUBSAMPLE_2X