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| author | Vinod Koul <vkoul@kernel.org> | 2020-06-29 19:17:36 +0530 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2020-07-07 11:53:41 +0200 |
| commit | d0af37c8ec07a1c51920415d61e651c3dc1d6dfb (patch) | |
| tree | 841cdaae3cd910f4db472f23dba22c68c4748b27 | |
| parent | 2441bf4dbcb8196d994aa992b1be725a701589f2 (diff) | |
ALSA: compress: document the compress gapless audio state machine
Also documented the galpess transitions. Please note that these are not
really stream states, but show how the stream steps in gapless mode
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20200629134737.105993-3-vkoul@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | Documentation/sound/designs/compress-offload.rst | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/Documentation/sound/designs/compress-offload.rst b/Documentation/sound/designs/compress-offload.rst index ad89af9b31c9..935f325dbc77 100644 --- a/Documentation/sound/designs/compress-offload.rst +++ b/Documentation/sound/designs/compress-offload.rst @@ -250,6 +250,38 @@ Sequence flow for gapless would be: (note: order for partial_drain and write for next track can be reversed as well) +Gapless Playback SM +=================== + +For Gapless, we move from running state to partial drain and back, along +with setting of meta_data and signalling for next track :: + + + +----------+ + compr_drain_notify() | | + +------------------------>| RUNNING | + | | | + | +----------+ + | | + | | + | | compr_next_track() + | | + | V + | +----------+ + | | | + | |NEXT_TRACK| + | | | + | +----------+ + | | + | | + | | compr_partial_drain() + | | + | V + | +----------+ + | | | + +------------------------ | PARTIAL_ | + | DRAIN | + +----------+ Not supported ============= |