[pulseaudio-discuss] [RFC v2 00/18] bluetooth: Revive MP3 passthrough over A2DP
Frédéric Dalleau
frederic.dalleau at linux.intel.com
Thu Mar 22 09:36:24 PDT 2012
Hi,
This is the v2 of the work on A2DP MPEG and media API.
v1 tried to send MP3 using A2DP source role.
v2 adds a sink to receive the MP3 data and restores SBC/MPEG switching.
There is also a patch in BlueZ to make this work. It will take time before the
DBUS apis are worked out.
It is possible using two adapters to send and receive the data using one
pulseaudio. It is interesting to see that the IEC data received using this
technique is exactly the same that was sent.
#
# test MP3 playback
#
pacmd set-card-profile bluez_card.aa_bb_cc_dd_ee_ff a2dp
paplay <your_file>.wav --device=bluez_sink.aa_bb_cc_dd_ee_ff
paplay --raw --passthrough -v --format="s16le" --rate=44100 --device=bluez_sink.aa_bb_cc_dd_ee_ff <your_file>.iec
#
# test MP3 sink
#
pacmd set-card-profile bluez_card.00_11_22_33_44_55 a2dp_source
/usr/bin/parec --raw --passthrough -v --format="s16le" --rate=44100 --device=bluez_source.00_11_22_33_44_55 <your_file>2.iec
Still one bug pending, when switching back from MPEG to SBC, the sink does not
resume. I just kill paplay then wait until module-suspend-on-idle suspend the
stream, then retry. Of course this is still rough, so there might be others!
Let me know what you think.
Regards,
Frédéric
Arun Raghavan (3):
bluetooth: Use new API for exposing A2DP MPEG sinks
bluetooth: Handle configuration failures more gracefully
bluetooth: Fixes for PCM-MPEG switching
Frédéric Dalleau (14):
Fix build : Remove usage of passthrough profile
bluetooth: Register MP3 endpoint for bluetooth
bluetooth: Handle SelectConfiguration for MP3 endpoint
bluetooth: module-bluetooth-device changes
bluetooth: Initialize codec value
bluetooth: configure device based on selected transport
bluetooth: Register MP3 sink endpoint for bluetooth
bluetooth: declare source support for IEC61937
bluetooth: Build and push IEC frame if codec is MPEG
bluetooth: Build and push fragmented MPEG frames
bluetooth: Fix module-bluetooth-device load failed
bluetooth: utility to trigger a2dp reconfigure
bluetooth: parse MediaTransport.Codecs property
bluetooth: switch between SBC and MPEG
Pierre-Louis Bossart (1):
bluetooth: MP3 passthrough over A2DP
src/modules/bluetooth/bluetooth-util.c | 272 ++++-
src/modules/bluetooth/bluetooth-util.h | 4 +
src/modules/bluetooth/module-bluetooth-device.c | 1353 ++++++++++++++++++---
src/modules/bluetooth/module-bluetooth-discover.c | 3 +-
src/modules/bluetooth/rtp.h | 14 +-
5 files changed, 1437 insertions(+), 209 deletions(-)
--
1.7.5.4
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