From: Vinod Koul <vkoul@kernel.org>
To: Takashi Iwai <tiwai@suse.com>, Jaroslav Kysela <perex@perex.cz>
Cc: Vinod Koul <vkoul@kernel.org>,
Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
Charles Keepax <ckeepax@opensource.cirrus.com>,
alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org
Subject: [PATCH v4 1/3] ALSA: compress: document the compress audio state machine
Date: Mon, 29 Jun 2020 13:20:00 +0530 [thread overview]
Message-ID: <20200629075002.11436-2-vkoul@kernel.org> (raw)
In-Reply-To: <20200629075002.11436-1-vkoul@kernel.org>
So we had some discussions of the stream states, so I thought it is a
good idea to document the state transitions, so add it documentation
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
.../sound/designs/compress-offload.rst | 51 +++++++++++++++++++
1 file changed, 51 insertions(+)
diff --git a/Documentation/sound/designs/compress-offload.rst b/Documentation/sound/designs/compress-offload.rst
index ad4bfbdacc83..b6e9025ae105 100644
--- a/Documentation/sound/designs/compress-offload.rst
+++ b/Documentation/sound/designs/compress-offload.rst
@@ -151,6 +151,57 @@ Modifications include:
- Addition of encoding options when required (derived from OpenMAX IL)
- Addition of rateControlSupported (missing in OpenMAX AL)
+State Machine
+=============
+
+The compressed audio stream state machine is described below ::
+
+ +----------+
+ | |
+ | OPEN |
+ | |
+ +----------+
+ |
+ |
+ | compr_set_params()
+ |
+ v
+ compr_free() +----------+
+ +------------------------------------| |
+ | | SETUP |
+ | +------------------------>| |<-------------------------+
+ | | compr_drain_notify() +----------+ |
+ | | or | |
+ | | compr_stop() | |
+ | | | compr_write() |
+ | | | |
+ | | v |
+ | | +----------+ |
+ | | | | compr_free() |
+ | | | PREPARE |---------------> A |
+ | | | | |
+ | | +----------+ |
+ | | | |
+ | | | |
+ | | | compr_start() |
+ | | | |
+ | | v |
+ | +----------+ +----------+ |
+ | | | compr_drain() | | compr_stop() |
+ | | DRAIN |<-------------------| RUNNING |--------------------------+
+ | | | | | |
+ | +----------+ +----------+ |
+ | | ^ |
+ | A | | |
+ | | compr_pause() | | compr_resume() |
+ | | | | |
+ | v v | |
+ | +----------+ +----------+ |
+ | | | | | compr_stop() |
+ +--->| FREE | | PAUSE |---------------------------+
+ | | | |
+ +----------+ +----------+
+
Gapless Playback
================
--
2.26.2
WARNING: multiple messages have this Message-ID (diff)
From: Vinod Koul <vkoul@kernel.org>
To: Takashi Iwai <tiwai@suse.com>, Jaroslav Kysela <perex@perex.cz>
Cc: alsa-devel@alsa-project.org,
Charles Keepax <ckeepax@opensource.cirrus.com>,
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
linux-kernel@vger.kernel.org, Vinod Koul <vkoul@kernel.org>,
Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Subject: [PATCH v4 1/3] ALSA: compress: document the compress audio state machine
Date: Mon, 29 Jun 2020 13:20:00 +0530 [thread overview]
Message-ID: <20200629075002.11436-2-vkoul@kernel.org> (raw)
In-Reply-To: <20200629075002.11436-1-vkoul@kernel.org>
So we had some discussions of the stream states, so I thought it is a
good idea to document the state transitions, so add it documentation
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
.../sound/designs/compress-offload.rst | 51 +++++++++++++++++++
1 file changed, 51 insertions(+)
diff --git a/Documentation/sound/designs/compress-offload.rst b/Documentation/sound/designs/compress-offload.rst
index ad4bfbdacc83..b6e9025ae105 100644
--- a/Documentation/sound/designs/compress-offload.rst
+++ b/Documentation/sound/designs/compress-offload.rst
@@ -151,6 +151,57 @@ Modifications include:
- Addition of encoding options when required (derived from OpenMAX IL)
- Addition of rateControlSupported (missing in OpenMAX AL)
+State Machine
+=============
+
+The compressed audio stream state machine is described below ::
+
+ +----------+
+ | |
+ | OPEN |
+ | |
+ +----------+
+ |
+ |
+ | compr_set_params()
+ |
+ v
+ compr_free() +----------+
+ +------------------------------------| |
+ | | SETUP |
+ | +------------------------>| |<-------------------------+
+ | | compr_drain_notify() +----------+ |
+ | | or | |
+ | | compr_stop() | |
+ | | | compr_write() |
+ | | | |
+ | | v |
+ | | +----------+ |
+ | | | | compr_free() |
+ | | | PREPARE |---------------> A |
+ | | | | |
+ | | +----------+ |
+ | | | |
+ | | | |
+ | | | compr_start() |
+ | | | |
+ | | v |
+ | +----------+ +----------+ |
+ | | | compr_drain() | | compr_stop() |
+ | | DRAIN |<-------------------| RUNNING |--------------------------+
+ | | | | | |
+ | +----------+ +----------+ |
+ | | ^ |
+ | A | | |
+ | | compr_pause() | | compr_resume() |
+ | | | | |
+ | v v | |
+ | +----------+ +----------+ |
+ | | | | | compr_stop() |
+ +--->| FREE | | PAUSE |---------------------------+
+ | | | |
+ +----------+ +----------+
+
Gapless Playback
================
--
2.26.2
next prev parent reply other threads:[~2020-06-29 21:38 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-29 7:49 [PATCH v4 0/3] ALSA: compress: Document stream states and fix gapless SM Vinod Koul
2020-06-29 7:49 ` Vinod Koul
2020-06-29 7:50 ` Vinod Koul [this message]
2020-06-29 7:50 ` [PATCH v4 1/3] ALSA: compress: document the compress audio state machine Vinod Koul
2020-06-29 9:05 ` Amadeusz Sławiński
2020-06-29 9:05 ` Amadeusz Sławiński
2020-06-29 9:34 ` Vinod Koul
2020-06-29 9:34 ` Vinod Koul
2020-06-29 10:02 ` Amadeusz Sławiński
2020-06-29 10:02 ` Amadeusz Sławiński
2020-06-29 10:59 ` Vinod Koul
2020-06-29 10:59 ` Vinod Koul
2020-06-29 7:50 ` [PATCH v4 2/3] ALSA: compress: document the compress gapless " Vinod Koul
2020-06-29 7:50 ` Vinod Koul
2020-06-29 7:50 ` [PATCH v4 3/3] ALSA: compress: fix partial_drain completion state Vinod Koul
2020-06-29 7:50 ` Vinod Koul
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200629075002.11436-2-vkoul@kernel.org \
--to=vkoul@kernel.org \
--cc=alsa-devel@alsa-project.org \
--cc=ckeepax@opensource.cirrus.com \
--cc=linux-kernel@vger.kernel.org \
--cc=perex@perex.cz \
--cc=pierre-louis.bossart@linux.intel.com \
--cc=srinivas.kandagatla@linaro.org \
--cc=tiwai@suse.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.