[pulseaudio-discuss] [PATCH 1/4] bluetooth: Add basic support for HEADSET profiles
Tanu Kaskinen
tanu.kaskinen at linux.intel.com
Sun Aug 17 02:22:40 PDT 2014
On Wed, 2014-08-13 at 15:23 +0300, Luiz Augusto von Dentz wrote:
> From: João Paulo Rechi Vita <jprvita at openbossa.org>
>
> This commit adds basic support for devices implementing HSP Headset
> Unit, HSP Audio Gateway, HFP Handsfree Unit, HFP Audio Gateway to the
> BlueZ 5 bluetooth audio devices driver module (module-bluez5-device).
> ---
> src/modules/bluetooth/bluez5-util.c | 4 +
> src/modules/bluetooth/bluez5-util.h | 6 +
> src/modules/bluetooth/module-bluez5-device.c | 426 ++++++++++++++++++++-------
> 3 files changed, 328 insertions(+), 108 deletions(-)
>
> diff --git a/src/modules/bluetooth/bluez5-util.c b/src/modules/bluetooth/bluez5-util.c
> index 5b6b372..adb8351 100644
> --- a/src/modules/bluetooth/bluez5-util.c
> +++ b/src/modules/bluetooth/bluez5-util.c
> @@ -1109,6 +1109,10 @@ const char *pa_bluetooth_profile_to_string(pa_bluetooth_profile_t profile) {
> return "a2dp_sink";
> case PA_BLUETOOTH_PROFILE_A2DP_SOURCE:
> return "a2dp_source";
> + case PA_BLUETOOTH_PROFILE_HEADSET_HEAD_UNIT:
> + return "headset_head_unit";
> + case PA_BLUETOOTH_PROFILE_HEADSET_AUDIO_GATEWAY:
> + return "headset_audio_gateway";
> case PA_BLUETOOTH_PROFILE_OFF:
> return "off";
> }
> diff --git a/src/modules/bluetooth/bluez5-util.h b/src/modules/bluetooth/bluez5-util.h
> index 63bae35..0121733 100644
> --- a/src/modules/bluetooth/bluez5-util.h
> +++ b/src/modules/bluetooth/bluez5-util.h
> @@ -26,6 +26,10 @@
>
> #define PA_BLUETOOTH_UUID_A2DP_SOURCE "0000110a-0000-1000-8000-00805f9b34fb"
> #define PA_BLUETOOTH_UUID_A2DP_SINK "0000110b-0000-1000-8000-00805f9b34fb"
> +#define PA_BLUETOOTH_UUID_HSP_HS "00001108-0000-1000-8000-00805f9b34fb"
> +#define PA_BLUETOOTH_UUID_HSP_AG "00001112-0000-1000-8000-00805f9b34fb"
> +#define PA_BLUETOOTH_UUID_HFP_HF "0000111e-0000-1000-8000-00805f9b34fb"
> +#define PA_BLUETOOTH_UUID_HFP_AG "0000111f-0000-1000-8000-00805f9b34fb"
>
> typedef struct pa_bluetooth_transport pa_bluetooth_transport;
> typedef struct pa_bluetooth_device pa_bluetooth_device;
> @@ -41,6 +45,8 @@ typedef enum pa_bluetooth_hook {
> typedef enum profile {
> PA_BLUETOOTH_PROFILE_A2DP_SINK,
> PA_BLUETOOTH_PROFILE_A2DP_SOURCE,
> + PA_BLUETOOTH_PROFILE_HEADSET_HEAD_UNIT,
> + PA_BLUETOOTH_PROFILE_HEADSET_AUDIO_GATEWAY,
> PA_BLUETOOTH_PROFILE_OFF
> } pa_bluetooth_profile_t;
> #define PA_BLUETOOTH_PROFILE_COUNT PA_BLUETOOTH_PROFILE_OFF
> diff --git a/src/modules/bluetooth/module-bluez5-device.c b/src/modules/bluetooth/module-bluez5-device.c
> index 57b2791..92c804a 100644
> --- a/src/modules/bluetooth/module-bluez5-device.c
> +++ b/src/modules/bluetooth/module-bluez5-device.c
> @@ -33,6 +33,7 @@
> #include <pulse/timeval.h>
>
> #include <pulsecore/core-error.h>
> +#include <pulsecore/core-rtclock.h>
> #include <pulsecore/core-util.h>
> #include <pulsecore/i18n.h>
> #include <pulsecore/module.h>
> @@ -59,7 +60,9 @@ PA_MODULE_USAGE("path=<device object path>");
>
> #define MAX_PLAYBACK_CATCH_UP_USEC (100 * PA_USEC_PER_MSEC)
> #define FIXED_LATENCY_PLAYBACK_A2DP (25 * PA_USEC_PER_MSEC)
> +#define FIXED_LATENCY_PLAYBACK_SCO (125 * PA_USEC_PER_MSEC)
> #define FIXED_LATENCY_RECORD_A2DP (25 * PA_USEC_PER_MSEC)
> +#define FIXED_LATENCY_RECORD_SCO (25 * PA_USEC_PER_MSEC)
>
> #define BITPOOL_DEC_LIMIT 32
> #define BITPOOL_DEC_STEP 5
> @@ -236,6 +239,154 @@ static void connect_ports(struct userdata *u, void *new_data, pa_direction_t dir
> }
>
> /* Run from IO thread */
> +static int sco_process_render(struct userdata *u) {
> + ssize_t l;
> +
> + pa_assert(u);
> + pa_assert(u->profile == PA_BLUETOOTH_PROFILE_HEADSET_HEAD_UNIT ||
> + u->profile == PA_BLUETOOTH_PROFILE_HEADSET_AUDIO_GATEWAY);
> + pa_assert(u->sink);
> +
> + /* First, render some data */
> + if (!u->write_memchunk.memblock)
> + pa_sink_render_full(u->sink, u->write_block_size, &u->write_memchunk);
As I said to João, I'd prefer using a local memchunk instead of
u->write_memchunk, because u->write_memchunk doesn't carry any
meaningful state information in the SCO case.
> +
> + pa_assert(u->write_memchunk.length == u->write_block_size);
> +
> + for (;;) {
> + const void *p;
> +
> + /* Now write that data to the socket. The socket is of type
> + * SEQPACKET, and we generated the data of the MTU size, so this
> + * should just work. */
> +
> + p = (const uint8_t *) pa_memblock_acquire_chunk(&u->write_memchunk);
> + l = pa_write(u->stream_fd, p, u->write_memchunk.length, &u->stream_write_type);
> + pa_memblock_release(u->write_memchunk.memblock);
> +
> + pa_assert(l != 0);
> +
> + if (l > 0)
Tab used for indentation.
> + break;
> +
> + if (errno == EINTR)
> + /* Retry right away if we got interrupted */
> + continue;
> + else if (errno == EAGAIN)
> + /* Hmm, apparently the socket was not writable, give up for now */
> + return 0;
> +
> + pa_log_error("Failed to write data to SCO socket: %s", pa_cstrerror(errno));
> + return -1;
> + }
> +
> + pa_assert((size_t) l <= u->write_memchunk.length);
> +
> + if ((size_t) l != u->write_memchunk.length) {
> + pa_log_error("Wrote memory block to socket only partially! %llu written, wanted to write %llu.",
> + (unsigned long long) l,
> + (unsigned long long) u->write_memchunk.length);
Unaligned indentation.
> + return -1;
> + }
> +
> + u->write_index += (uint64_t) u->write_memchunk.length;
> + pa_memblock_unref(u->write_memchunk.memblock);
> + pa_memchunk_reset(&u->write_memchunk);
> +
> + return l;
The return value on success used to be 1, and that's what the call site
expects.
> +}
> +
> +/* Run from IO thread */
> +static int sco_process_push(struct userdata *u) {
> + ssize_t l;
> + pa_memchunk memchunk;
> + struct cmsghdr *cm;
> + struct msghdr m;
> + bool found_tstamp = false;
> + pa_usec_t tstamp = 0;
> +
> + pa_assert(u);
> + pa_assert(u->profile == PA_BLUETOOTH_PROFILE_HEADSET_HEAD_UNIT ||
> + u->profile == PA_BLUETOOTH_PROFILE_HEADSET_AUDIO_GATEWAY);
> + pa_assert(u->source);
> + pa_assert(u->read_smoother);
> +
> + memchunk.memblock = pa_memblock_new(u->core->mempool, u->read_block_size);
> + memchunk.index = memchunk.length = 0;
> +
> + for (;;) {
> + void *p;
> + uint8_t aux[1024];
> + struct iovec iov;
> +
> + pa_zero(m);
> + pa_zero(aux);
> + pa_zero(iov);
> +
> + m.msg_iov = &iov;
> + m.msg_iovlen = 1;
> + m.msg_control = aux;
> + m.msg_controllen = sizeof(aux);
> +
> + p = pa_memblock_acquire(memchunk.memblock);
> + iov.iov_base = p;
> + iov.iov_len = pa_memblock_get_length(memchunk.memblock);
> + l = recvmsg(u->stream_fd, &m, 0);
> + pa_memblock_release(memchunk.memblock);
> +
> + if (l > 0)
Tab used for indentation.
> + break;
> +
> + if (l < 0 && errno == EINTR)
> + /* Retry right away if we got interrupted */
> + continue;
> + else if (l < 0 && errno == EAGAIN)
> + /* Hmm, apparently the socket was not readable, give up for now. */
> + return 0;
memchunk.memblock needs to be unreffed.
> +
> + pa_log_error("Failed to read data from SCO socket: %s", l < 0 ? pa_cstrerror(errno) : "EOF");
> + return -1;
memchunk.memblock needs to be unreffed.
> + }
> +
> + pa_assert((size_t) l <= pa_memblock_get_length(memchunk.memblock));
> +
> + /* In some rare occasions, we might receive packets of a very strange
> + * size. This could potentially be possible if the SCO packet was
> + * received partially over-the-air, or more probably due to hardware
> + * issues in our Bluetooth adapter. In these cases, in order to avoid
> + * an assertion failure due to unaligned data, just discard the whole
> + * packet */
> + if (!pa_frame_aligned(l, &u->sample_spec)) {
> + pa_log_warn("SCO packet received of unaligned size: %zu", l);
> + return -1;
memchunk.memblock needs to be unreffed.
> + }
> +
> + memchunk.length = (size_t) l;
> + u->read_index += (uint64_t) l;
> +
> + for (cm = CMSG_FIRSTHDR(&m); cm; cm = CMSG_NXTHDR(&m, cm))
> + if (cm->cmsg_level == SOL_SOCKET && cm->cmsg_type == SO_TIMESTAMP) {
> + struct timeval *tv = (struct timeval*) CMSG_DATA(cm);
> + pa_rtclock_from_wallclock(tv);
> + tstamp = pa_timeval_load(tv);
> + found_tstamp = true;
There used to be a "break" here, and I think it should not be removed.
--
Tanu
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