Improvements:
- Once a {playback, capture} stream is initiated.
We should start write (read) audio in each callback period or
the underlaying audio server will underrun (overrun).
(Even in the WorkerStatus::Pause state).
- Change the polling loop logic to
wait for next buffer
-> check status
-> try_next desc_chain or exit
-> transfer data or exit
And make start_pcm_worker act like real audio hw device, which
consumes data in every fixed period.
- Right before leaving from WorkerStatus::Quit, we still need to
transfer data to/from the running stream to prevent
underrun or overrun.
Changes:
- changes in start_pcm_worker:
- extract read_data, write_data utils
- implement From<Result<()>, Error> for virtio_snd_pcm_status
- poll next_{capture, playback}_buffer
- if status == WorkerStatus::Pause, still need to transfer data to
prevent underrun or overrun
- split Output and Input stream logic
- use copy_from or copy_to instead to io::copy
- remove Condvar usage
- changes in audio_streams
- add copy_from in AudioBuffer and AsyncPlaybackBuffer
- add copy_to in AudioBuffer and AsyncCaptureBuffer
BUG=b:210197743
TEST=alsa_conformance_test and make sure there is no
`ERR cras_server[1818]: Error reading msg from client: rc: -104` or
`ERR cras_server[1818]: fetch err: -32 for 6490001`
errors.
Change-Id: I004969040881cb2d46b54589e3e7e634ea67d152
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3341135
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Chih-Yang Hsia <paulhsia@chromium.org>
If frame_size is not "power of 2" (e.g. 12 bytes in 6channel/S16_LE),
current write implementation will trigger io::copy error since
- io::copy will split reader into multiple buffers with len() = "power of 2"
if writer.capacity() >= DEFAULT_BUF_SIZE (which is 8192) and
- trigger early return since current write don't support incomplete frames
writing.
Changes:
- Remove redundant write impl
- Fix write implementation in AudioBuffer
- Add io_copy_audio_buffer unit test
BUG=b:199001477
BUG=b:201382814
TEST=`cargo test`
TEST=`cargo clippy --all-targets --all-features -- -D warnings`
TEST=`aplay -Dhw:0,0 -f dat /dev/zeros -c 6` with virtio-snd
Change-Id: Ia6b587ab20f474d8c620b69940ca0cc7095da6db
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3331976
Reviewed-by: Woody Chow <woodychow@google.com>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Chih-Yang Hsia <paulhsia@chromium.org>
Define `SharedMemory` trait, implement it for `base::SharedMemory`, and
use it for `ShmStreamSource::new_stream()` so that we can pass on
`base::SharedMemory` without exposing `base` to libcras.
Note that we implement the trait for `base::SharedMemory` in `base`
crate instead of in `audio_streams`, which means `base` depends on
`audio_streams`, because `audio_streams` is available for non-crosvm
projects while `base` isn't.
The corresponding CRAS change is crrev.com/c/3251123.
BUG=b:194137301, b:204444445
TEST=cargo test --all-features
Change-Id: I2430d9881d98032592c9f9202d70deb22e006f63
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3251820
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-by: Chih-Yang Hsia <paulhsia@chromium.org>
Commit-Queue: Keiichi Watanabe <keiichiw@chromium.org>
This change contains the results of running
./tools/contib/cargo_refactor.py
This will break the next uprev, and needs to be synchronizized
with the corresponding ebuild changes in https://crrev.com/c/3248925
BUG=b:195126527
TEST=./tools/run_tests
Change-Id: Ied15a1841887bb8f59fba65b912b81acf69beb73
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3248129
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Dennis Kempin <denniskempin@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
