Return-Path: From: Andrei Emeltchenko To: linux-bluetooth@vger.kernel.org Subject: [PATCHv5 05/13] android/hal-sco: Implement Audio IPC on Audio HAL Date: Fri, 9 May 2014 12:19:47 +0300 Message-Id: <1399627195-471-5-git-send-email-Andrei.Emeltchenko.news@gmail.com> In-Reply-To: <1399627195-471-1-git-send-email-Andrei.Emeltchenko.news@gmail.com> References: <1399627195-471-1-git-send-email-Andrei.Emeltchenko.news@gmail.com> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: From: Andrei Emeltchenko --- android/hal-sco.c | 320 +++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 319 insertions(+), 1 deletion(-) diff --git a/android/hal-sco.c b/android/hal-sco.c index 6711d7f..4153139 100644 --- a/android/hal-sco.c +++ b/android/hal-sco.c @@ -16,13 +16,20 @@ */ #include +#include +#include #include #include #include +#include +#include +#include #include #include +#include "sco-msg.h" +#include "ipc-common.h" #include "hal-log.h" #define AUDIO_STREAM_DEFAULT_RATE 44100 @@ -30,15 +37,24 @@ #define OUT_BUFFER_SIZE 2560 +static int listen_sk = -1; +static int audio_sk = -1; + +static pthread_t ipc_th = 0; +static pthread_mutex_t sk_mutex = PTHREAD_MUTEX_INITIALIZER; + struct sco_audio_config { uint32_t rate; uint32_t channels; + uint16_t mtu; audio_format_t format; }; struct sco_stream_out { struct audio_stream_out stream; + struct sco_audio_config cfg; + int fd; }; struct sco_audio_dev { @@ -46,13 +62,186 @@ struct sco_audio_dev { struct sco_stream_out *out; }; +/* Audio IPC functions */ + +static int audio_ipc_cmd(uint8_t service_id, uint8_t opcode, uint16_t len, + void *param, size_t *rsp_len, void *rsp, int *fd) +{ + ssize_t ret; + struct msghdr msg; + struct iovec iv[2]; + struct ipc_hdr cmd; + char cmsgbuf[CMSG_SPACE(sizeof(int))]; + struct ipc_status s; + size_t s_len = sizeof(s); + + pthread_mutex_lock(&sk_mutex); + + if (audio_sk < 0) { + error("audio: Invalid cmd socket passed to audio_ipc_cmd"); + goto failed; + } + + if (!rsp || !rsp_len) { + memset(&s, 0, s_len); + rsp_len = &s_len; + rsp = &s; + } + + memset(&msg, 0, sizeof(msg)); + memset(&cmd, 0, sizeof(cmd)); + + cmd.service_id = service_id; + cmd.opcode = opcode; + cmd.len = len; + + iv[0].iov_base = &cmd; + iv[0].iov_len = sizeof(cmd); + + iv[1].iov_base = param; + iv[1].iov_len = len; + + msg.msg_iov = iv; + msg.msg_iovlen = 2; + + ret = sendmsg(audio_sk, &msg, 0); + if (ret < 0) { + error("audio: Sending command failed:%s", strerror(errno)); + goto failed; + } + + /* socket was shutdown */ + if (ret == 0) { + error("audio: Command socket closed"); + goto failed; + } + + memset(&msg, 0, sizeof(msg)); + memset(&cmd, 0, sizeof(cmd)); + + iv[0].iov_base = &cmd; + iv[0].iov_len = sizeof(cmd); + + iv[1].iov_base = rsp; + iv[1].iov_len = *rsp_len; + + msg.msg_iov = iv; + msg.msg_iovlen = 2; + + if (fd) { + memset(cmsgbuf, 0, sizeof(cmsgbuf)); + msg.msg_control = cmsgbuf; + msg.msg_controllen = sizeof(cmsgbuf); + } + + ret = recvmsg(audio_sk, &msg, 0); + if (ret < 0) { + error("audio: Receiving command response failed:%s", + strerror(errno)); + goto failed; + } + + if (ret < (ssize_t) sizeof(cmd)) { + error("audio: Too small response received(%zd bytes)", ret); + goto failed; + } + + if (cmd.service_id != service_id) { + error("audio: Invalid service id (%u vs %u)", cmd.service_id, + service_id); + goto failed; + } + + if (ret != (ssize_t) (sizeof(cmd) + cmd.len)) { + error("audio: Malformed response received(%zd bytes)", ret); + goto failed; + } + + if (cmd.opcode != opcode && cmd.opcode != AUDIO_OP_STATUS) { + error("audio: Invalid opcode received (%u vs %u)", + cmd.opcode, opcode); + goto failed; + } + + if (cmd.opcode == AUDIO_OP_STATUS) { + struct ipc_status *s = rsp; + + if (sizeof(*s) != cmd.len) { + error("audio: Invalid status length"); + goto failed; + } + + if (s->code == AUDIO_STATUS_SUCCESS) { + error("audio: Invalid success status response"); + goto failed; + } + + pthread_mutex_unlock(&sk_mutex); + + return s->code; + } + + pthread_mutex_unlock(&sk_mutex); + + /* Receive auxiliary data in msg */ + if (fd) { + struct cmsghdr *cmsg; + + *fd = -1; + + for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; + cmsg = CMSG_NXTHDR(&msg, cmsg)) { + if (cmsg->cmsg_level == SOL_SOCKET + && cmsg->cmsg_type == SCM_RIGHTS) { + memcpy(fd, CMSG_DATA(cmsg), sizeof(int)); + break; + } + } + + if (*fd < 0) + goto failed; + } + + if (rsp_len) + *rsp_len = cmd.len; + + return AUDIO_STATUS_SUCCESS; + +failed: + /* Some serious issue happen on IPC - recover */ + shutdown(audio_sk, SHUT_RDWR); + pthread_mutex_unlock(&sk_mutex); + + return AUDIO_STATUS_FAILED; +} + +static int ipc_connect_sco(int *fd, uint16_t *mtu) +{ + struct audio_rsp_connect_sco rsp; + size_t rsp_len = sizeof(rsp); + int ret; + + DBG(""); + + ret = audio_ipc_cmd(AUDIO_SERVICE_SCO_ID, AUDIO_OP_CONNECT_SCO, 0, + NULL, &rsp_len, &rsp, fd); + + *mtu = rsp.mtu; + + return ret; +} + /* Audio stream functions */ static ssize_t out_write(struct audio_stream_out *stream, const void *buffer, size_t bytes) { + struct sco_stream_out *out = (struct sco_stream_out *) stream; + /* write data */ + DBG("write to fd %d bytes %zu", out->fd, bytes); + return bytes; } @@ -182,9 +371,18 @@ static int audio_open_output_stream(struct audio_hw_device *dev, { struct sco_audio_dev *adev = (struct sco_audio_dev *) dev; struct sco_stream_out *out; + int fd = -1; + uint16_t mtu; DBG(""); + if (ipc_connect_sco(&fd, &mtu) != AUDIO_STATUS_SUCCESS) { + error("audio: cannot get fd"); + return -EIO; + } + + DBG("got sco fd %d mtu %u", fd, mtu); + out = calloc(1, sizeof(struct sco_stream_out)); if (!out) return -ENOMEM; @@ -209,9 +407,11 @@ static int audio_open_output_stream(struct audio_hw_device *dev, out->cfg.format = AUDIO_STREAM_DEFAULT_FORMAT; out->cfg.channels = AUDIO_CHANNEL_OUT_MONO; out->cfg.rate = AUDIO_STREAM_DEFAULT_RATE; + out->cfg.mtu = mtu; *stream_out = &out->stream; adev->out = out; + out->fd = fd; return 0; } @@ -219,9 +419,17 @@ static int audio_open_output_stream(struct audio_hw_device *dev, static void audio_close_output_stream(struct audio_hw_device *dev, struct audio_stream_out *stream_out) { - DBG(""); + struct sco_audio_dev *sco_dev = (struct sco_audio_dev *) dev; + + DBG("dev %p stream %p fd %d", dev, stream_out, sco_dev->out->fd); + + if (sco_dev->out && sco_dev->out->fd) { + close(sco_dev->out->fd); + sco_dev->out->fd = -1; + } free(stream_out); + sco_dev->out = NULL; } static int audio_set_parameters(struct audio_hw_device *dev, @@ -325,10 +533,116 @@ static int audio_close(hw_device_t *device) return 0; } +static void *ipc_handler(void *data) +{ + bool done = false; + struct pollfd pfd; + int sk; + + DBG(""); + + while (!done) { + DBG("Waiting for connection ..."); + + sk = accept(listen_sk, NULL, NULL); + if (sk < 0) { + int err = errno; + + if (err == EINTR) + continue; + + if (err != ECONNABORTED && err != EINVAL) + error("audio: Failed to accept socket: %d (%s)", + err, strerror(err)); + + break; + } + + pthread_mutex_lock(&sk_mutex); + audio_sk = sk; + pthread_mutex_unlock(&sk_mutex); + + DBG("Audio IPC: Connected"); + + memset(&pfd, 0, sizeof(pfd)); + pfd.fd = audio_sk; + pfd.events = POLLHUP | POLLERR | POLLNVAL; + + /* Check if socket is still alive. Empty while loop.*/ + while (poll(&pfd, 1, -1) < 0 && errno == EINTR); + + if (pfd.revents & (POLLHUP | POLLERR | POLLNVAL)) { + info("Audio HAL: Socket closed"); + + pthread_mutex_lock(&sk_mutex); + close(audio_sk); + audio_sk = -1; + pthread_mutex_unlock(&sk_mutex); + } + } + + info("Closing Audio IPC thread"); + return NULL; +} + +static int sco_ipc_init(void) +{ + struct sockaddr_un addr; + int err; + int sk; + + DBG(""); + + sk = socket(PF_LOCAL, SOCK_SEQPACKET, 0); + if (sk < 0) { + err = -errno; + error("audio: Failed to create socket: %d (%s)", -err, + strerror(-err)); + return err; + } + + memset(&addr, 0, sizeof(addr)); + addr.sun_family = AF_UNIX; + + memcpy(addr.sun_path, BLUEZ_SCO_SK_PATH, sizeof(BLUEZ_SCO_SK_PATH)); + + if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) { + err = -errno; + error("audio: Failed to bind socket: %d (%s)", -err, + strerror(-err)); + goto failed; + } + + if (listen(sk, 1) < 0) { + err = -errno; + error("audio: Failed to listen on the socket: %d (%s)", -err, + strerror(-err)); + goto failed; + } + + listen_sk = sk; + + err = pthread_create(&ipc_th, NULL, ipc_handler, NULL); + if (err) { + err = -err; + ipc_th = 0; + error("audio: Failed to start Audio IPC thread: %d (%s)", + -err, strerror(-err)); + goto failed; + } + + return 0; + +failed: + close(sk); + return err; +} + static int audio_open(const hw_module_t *module, const char *name, hw_device_t **device) { struct sco_audio_dev *adev; + int err; DBG(""); @@ -338,6 +652,10 @@ static int audio_open(const hw_module_t *module, const char *name, return -EINVAL; } + err = sco_ipc_init(); + if (err < 0) + return err; + adev = calloc(1, sizeof(struct sco_audio_dev)); if (!adev) return -ENOMEM; -- 1.8.3.2