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Diffstat (limited to 'sound/core/compress_offload.c')
-rw-r--r--sound/core/compress_offload.c114
1 files changed, 108 insertions, 6 deletions
diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c
index ad11dc994792..c84abc886e90 100644
--- a/sound/core/compress_offload.c
+++ b/sound/core/compress_offload.c
@@ -144,16 +144,17 @@ static int snd_compr_free(struct inode *inode, struct file *f)
return 0;
}
-static void snd_compr_update_tstamp(struct snd_compr_stream *stream,
+static int snd_compr_update_tstamp(struct snd_compr_stream *stream,
struct snd_compr_tstamp *tstamp)
{
if (!stream->ops->pointer)
- return;
+ return -ENOTSUPP;
stream->ops->pointer(stream, tstamp);
pr_debug("dsp consumed till %d total %d bytes\n",
tstamp->byte_offset, tstamp->copied_total);
stream->runtime->hw_pointer = tstamp->byte_offset;
stream->runtime->total_bytes_transferred = tstamp->copied_total;
+ return 0;
}
static size_t snd_compr_calc_avail(struct snd_compr_stream *stream,
@@ -161,7 +162,9 @@ static size_t snd_compr_calc_avail(struct snd_compr_stream *stream,
{
long avail_calc; /*this needs to be signed variable */
+ memset(avail, 0, sizeof(*avail));
snd_compr_update_tstamp(stream, &avail->tstamp);
+ /* Still need to return avail even if tstamp can't be filled in */
/* FIXME: This needs to be different for capture stream,
available is # of compressed data, for playback it's
@@ -483,6 +486,8 @@ snd_compr_set_params(struct snd_compr_stream *stream, unsigned long arg)
if (retval)
goto out;
stream->runtime->state = SNDRV_PCM_STATE_SETUP;
+ stream->metadata_set = false;
+ stream->next_track = false;
} else {
return -EPERM;
}
@@ -514,14 +519,60 @@ out:
return retval;
}
+static int
+snd_compr_get_metadata(struct snd_compr_stream *stream, unsigned long arg)
+{
+ struct snd_compr_metadata metadata;
+ int retval;
+
+ if (!stream->ops->get_metadata)
+ return -ENXIO;
+
+ if (copy_from_user(&metadata, (void __user *)arg, sizeof(metadata)))
+ return -EFAULT;
+
+ retval = stream->ops->get_metadata(stream, &metadata);
+ if (retval != 0)
+ return retval;
+
+ if (copy_to_user((void __user *)arg, &metadata, sizeof(metadata)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int
+snd_compr_set_metadata(struct snd_compr_stream *stream, unsigned long arg)
+{
+ struct snd_compr_metadata metadata;
+ int retval;
+
+ if (!stream->ops->set_metadata)
+ return -ENXIO;
+ /*
+ * we should allow parameter change only when stream has been
+ * opened not in other cases
+ */
+ if (copy_from_user(&metadata, (void __user *)arg, sizeof(metadata)))
+ return -EFAULT;
+
+ retval = stream->ops->set_metadata(stream, &metadata);
+ stream->metadata_set = true;
+
+ return retval;
+}
+
static inline int
snd_compr_tstamp(struct snd_compr_stream *stream, unsigned long arg)
{
- struct snd_compr_tstamp tstamp;
+ struct snd_compr_tstamp tstamp = {0};
+ int ret;
- snd_compr_update_tstamp(stream, &tstamp);
- return copy_to_user((struct snd_compr_tstamp __user *)arg,
- &tstamp, sizeof(tstamp)) ? -EFAULT : 0;
+ ret = snd_compr_update_tstamp(stream, &tstamp);
+ if (ret == 0)
+ ret = copy_to_user((struct snd_compr_tstamp __user *)arg,
+ &tstamp, sizeof(tstamp)) ? -EFAULT : 0;
+ return ret;
}
static int snd_compr_pause(struct snd_compr_stream *stream)
@@ -594,6 +645,44 @@ static int snd_compr_drain(struct snd_compr_stream *stream)
return retval;
}
+static int snd_compr_next_track(struct snd_compr_stream *stream)
+{
+ int retval;
+
+ /* only a running stream can transition to next track */
+ if (stream->runtime->state != SNDRV_PCM_STATE_RUNNING)
+ return -EPERM;
+
+ /* you can signal next track isf this is intended to be a gapless stream
+ * and current track metadata is set
+ */
+ if (stream->metadata_set == false)
+ return -EPERM;
+
+ retval = stream->ops->trigger(stream, SND_COMPR_TRIGGER_NEXT_TRACK);
+ if (retval != 0)
+ return retval;
+ stream->metadata_set = false;
+ stream->next_track = true;
+ return 0;
+}
+
+static int snd_compr_partial_drain(struct snd_compr_stream *stream)
+{
+ int retval;
+ if (stream->runtime->state == SNDRV_PCM_STATE_PREPARED ||
+ stream->runtime->state == SNDRV_PCM_STATE_SETUP)
+ return -EPERM;
+ /* stream can be drained only when next track has been signalled */
+ if (stream->next_track == false)
+ return -EPERM;
+
+ retval = stream->ops->trigger(stream, SND_COMPR_TRIGGER_PARTIAL_DRAIN);
+
+ stream->next_track = false;
+ return retval;
+}
+
static long snd_compr_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
{
struct snd_compr_file *data = f->private_data;
@@ -623,6 +712,12 @@ static long snd_compr_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
case _IOC_NR(SNDRV_COMPRESS_GET_PARAMS):
retval = snd_compr_get_params(stream, arg);
break;
+ case _IOC_NR(SNDRV_COMPRESS_SET_METADATA):
+ retval = snd_compr_set_metadata(stream, arg);
+ break;
+ case _IOC_NR(SNDRV_COMPRESS_GET_METADATA):
+ retval = snd_compr_get_metadata(stream, arg);
+ break;
case _IOC_NR(SNDRV_COMPRESS_TSTAMP):
retval = snd_compr_tstamp(stream, arg);
break;
@@ -644,6 +739,13 @@ static long snd_compr_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
case _IOC_NR(SNDRV_COMPRESS_DRAIN):
retval = snd_compr_drain(stream);
break;
+ case _IOC_NR(SNDRV_COMPRESS_PARTIAL_DRAIN):
+ retval = snd_compr_partial_drain(stream);
+ break;
+ case _IOC_NR(SNDRV_COMPRESS_NEXT_TRACK):
+ retval = snd_compr_next_track(stream);
+ break;
+
}
mutex_unlock(&stream->device->lock);
return retval;