* Bring in commits from audio-caf to add support for more offload
formats, gapless offload, PCM offload, and 24-bit playback.
hal : Send drain to the driver if next track returns error
-Partial drain is send to the driver after next track ioctl.
-If next track times out or returns any error then call drain.
-Partial drain will not be executed if next track fails.
CRs-Fixed: 594977
hal: Add static internal function at the top of the file
-Add check_and_set_gapless_mode and get_offload_buffer_size functions
at the begining of hal file.
audio: Changes to support AV streaming in offload path
- Widevine sends ADTS data, set ADTS based on the parameter
- Set offload fragment size 2k for all video streaming
audio: Increase the period size for USB audio
-During USB audio playback, breaks are heard .This is
primarily due to overruns of USB buffer from the audio
HAL.
-By increasing the period size of USB buffer we are
avoiding overruns .
CRs-Fixed: 574897
hal: Add support for PCM in offload path
- Translate PCM Offload format to pcm codec id
- Set 16/24 sub format id in compress params format
- Calculate offload fragment size for pcm
- Move offload calculation functions to platform file
- Update audio policy manager isOffloadSupported
for pcm offload profile. Use audio.offload.pcm.enable
hal: Correct PCM offload fragment size
- Correct the fragment size to use bytes instead of bits
per sample
- Use 80ms as pcm offload buffer duration for video streaming
usecases and 1 sec for video + audio usecases
hal: Support for FLAC 24 bit format in offload path
- Add flac in supported codecs list
- Set FLAC codec specific parameters
- Set fragment size based on bit width and sampling rate
for flac.
- Configure backend to 24/16 bit based on the current
usecases running
hal: Featureize FLAC offload support
* Not all devices will have this code in the DSP, let alone the kernel.
* Featurize it, but leave the codec bit width and sample rate controls
in place so that 24-bit PCM offload still works.
hal: Offload bugfixes
* Always reset the bit width and sample rate if any active offload
stream is different. Failure to do this can crash the DSP, and
certain limitations come into play when a high samplerate is used
such as effects being unavailable.
* Don't send errors to the framework when the timestamp query fails
before the stream is up and running.
hal: Fix the samplerate/bitwidth comparison
hal: Avoid unnecessary rerouting for sample rate changes
* The backend codec supports just a few sample rates directly,
so make sure that we base our decision to reroute on this
value instead of the actual sample rate of the stream.
hal: Reduce the deep buffer period count.
-Deep buffer period count in the driver is 8. This adds to latency
of 160ms. This also results in the common block to have 8 buffers.
-The total latency used for AV sync is 320ms. AV sync issues are
seen due to this big latency
-Reduce the deep buffer cound from 8 to 4. This would reduce the
latency.
Change-Id: I28c8729cf35790857e8cc7146f98a52b36dfef79
CRs-Fixed: 598792