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authorJeeja KP <jeeja.kp@intel.com>2013-02-14 15:22:51 +0400
committerTakashi Iwai <tiwai@suse.de>2013-02-14 15:30:22 +0400
commit9727b490e543de956b8ba356e2d5499097d0b7a2 (patch)
tree81c41ee5b9987fdcb32c474484c39f45210507c0 /include/sound
parent8be69efacdc73fc110624f847bdf04b83decfc70 (diff)
downloadlinux-9727b490e543de956b8ba356e2d5499097d0b7a2.tar.xz
ALSA: compress: add support for gapless playback
this add new API for sound compress to support gapless playback. As noted in Documentation change, we add API to send metadata of encoder and padding delay to DSP. Also add API for indicating EOF and switching to subsequent track Also bump the compress API version Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound')
-rw-r--r--include/sound/compress_driver.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/sound/compress_driver.h b/include/sound/compress_driver.h
index f2912abacdf3..ff6c74153fa1 100644
--- a/include/sound/compress_driver.h
+++ b/include/sound/compress_driver.h
@@ -71,6 +71,8 @@ struct snd_compr_runtime {
* @runtime: pointer to runtime structure
* @device: device pointer
* @direction: stream direction, playback/recording
+ * @metadata_set: metadata set flag, true when set
+ * @next_track: has userspace signall next track transistion, true when set
* @private_data: pointer to DSP private data
*/
struct snd_compr_stream {
@@ -79,6 +81,8 @@ struct snd_compr_stream {
struct snd_compr_runtime *runtime;
struct snd_compr *device;
enum snd_compr_direction direction;
+ bool metadata_set;
+ bool next_track;
void *private_data;
};
@@ -110,6 +114,10 @@ struct snd_compr_ops {
struct snd_compr_params *params);
int (*get_params)(struct snd_compr_stream *stream,
struct snd_codec *params);
+ int (*set_metadata)(struct snd_compr_stream *stream,
+ struct snd_compr_metadata *metadata);
+ int (*get_metadata)(struct snd_compr_stream *stream,
+ struct snd_compr_metadata *metadata);
int (*trigger)(struct snd_compr_stream *stream, int cmd);
int (*pointer)(struct snd_compr_stream *stream,
struct snd_compr_tstamp *tstamp);