From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <502C0656.4050008@ntlworld.com> Date: Wed, 15 Aug 2012 21:28:06 +0100 From: "alistair.rodger" MIME-Version: 1.0 To: linux-bluetooth@vger.kernel.org Subject: Re: gstreamer a2dpSource plugin References: <5027DC19.8020505@ntlworld.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Sender: linux-bluetooth-owner@vger.kernel.org List-ID: I am trying to stream_from_ the device to a local sink. I am therefore looking for something like; gst-launch alsasrc device=bluetooth ! sbcdec ! ..... or gst-launch a2dpsource transport=/org/bluez/{PID}/hci0/dev_AA_BB_CC_DD_EE_FF/fd0 ! sbcdec ! ... preferably the second option as this would use SBC not PCM. But to clarify, I have been asked to investigate this as part of a product we are developing. So I am trying to understand the approach we should take. As an embedded device we cannot support PulseAudio but instead have been using gstreamer. I can stream_from_ our device using gstreamer but, I understand, the only way to stream to a device, using the higher quality a2dp sbc codec, is using pulse audio. There are examples on the web using "gst-launch alsasource device=bluetooth ! ..." but I believe this has been deprecated and can only support the SCO headset profile "low" quality audio. So what I am trying to determine is; 1) Is there a gstreamer source plugin which would take the audio out of the bluetooth stack and pipe it to the "sbcdec" plugin, from which I can pipe it to something like "alsasink"? 2) is it possible to stream the higher quality audio over alsasrc, or is alsa fundamentally only PCM ? 3) Is our only option to create or commission a gstreamer plugin? If so what steps should we take to pursue its creation. Sincerely, alistair