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https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-10-31 22:25:38 -04:00
module-rtp: improve session setup
This commit is contained in:
Wim Taymans
parent
dda5ed696b
commit
94b67603e5
1 changed files with 97 additions and 20 deletions
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@ -189,12 +189,24 @@ struct session {
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char *name;
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unsigned we_initiated:1;
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#define SESSION_STATE_INIT 0
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#define SESSION_STATE_SENDING_CTRL_IN 1
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#define SESSION_STATE_SENDING_DATA_IN 2
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#define SESSION_STATE_ESTABLISHING 3
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#define SESSION_STATE_ESTABLISHED 4
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int state;
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uint32_t initiator;
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uint32_t remote_ssrc;
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uint32_t ssrc;
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uint32_t ts_offset;
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unsigned sending:1;
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unsigned receiving:1;
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unsigned ctrl_ready:1;
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unsigned data_ready:1;
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};
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@ -270,6 +282,7 @@ static void send_apple_midi_cmd_in(struct session *sess, bool ctrl)
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struct iovec iov[3];
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struct msghdr msg;
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struct rtp_apple_midi hdr;
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int fd;
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spa_zero(hdr);
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hdr.cmd = htonl(APPLE_MIDI_CMD_IN);
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@ -283,12 +296,21 @@ static void send_apple_midi_cmd_in(struct session *sess, bool ctrl)
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iov[1].iov_len = strlen(impl->session_name)+1;
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spa_zero(msg);
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msg.msg_name = ctrl ? &sess->ctrl_addr : &sess->data_addr;
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msg.msg_namelen = ctrl ? sess->ctrl_len : sess->data_len;
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if (ctrl) {
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msg.msg_name = &sess->ctrl_addr;
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msg.msg_namelen = sess->ctrl_len;
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fd = impl->ctrl_source->fd;
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sess->state = SESSION_STATE_SENDING_CTRL_IN;
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} else {
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msg.msg_name = &sess->data_addr;
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msg.msg_namelen = sess->data_len;
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fd = impl->data_source->fd;
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sess->state = SESSION_STATE_SENDING_DATA_IN;
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}
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msg.msg_iov = iov;
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msg.msg_iovlen = 2;
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send_packet(ctrl ? impl->ctrl_source->fd : impl->data_source->fd, &msg);
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send_packet(fd, &msg);
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}
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static void send_apple_midi_cmd_by(struct session *sess, bool ctrl)
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@ -316,6 +338,39 @@ static void send_apple_midi_cmd_by(struct session *sess, bool ctrl)
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send_packet(ctrl ? impl->ctrl_source->fd : impl->data_source->fd, &msg);
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}
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static void session_establish(struct session *sess)
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{
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switch (sess->state) {
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case SESSION_STATE_INIT:
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/* we initiate */
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sess->we_initiated = true;
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if (!sess->ctrl_ready)
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send_apple_midi_cmd_in(sess, true);
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else if (!sess->data_ready)
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send_apple_midi_cmd_in(sess, false);
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break;
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case SESSION_STATE_ESTABLISHING:
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case SESSION_STATE_ESTABLISHED:
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/* we're done or waiting for other initiator */
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break;
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case SESSION_STATE_SENDING_CTRL_IN:
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case SESSION_STATE_SENDING_DATA_IN:
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/* we're busy initiating */
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break;
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}
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}
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static void session_stop(struct session *sess)
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{
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if (!sess->we_initiated)
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return;
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if (sess->ctrl_ready)
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send_apple_midi_cmd_by(sess, true);
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if (sess->data_ready)
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send_apple_midi_cmd_by(sess, false);
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sess->state = SESSION_STATE_INIT;
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}
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static void send_destroy(void *data)
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{
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}
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@ -327,15 +382,12 @@ static void send_state_changed(void *data, bool started, const char *error)
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pw_log_info("send initiator:%08x state %d", sess->initiator, started);
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if (started) {
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if (!sess->ctrl_ready)
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send_apple_midi_cmd_in(sess, true);
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else if (!sess->data_ready)
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send_apple_midi_cmd_in(sess, false);
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sess->sending = true;
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session_establish(sess);
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} else {
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if (sess->ctrl_ready)
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send_apple_midi_cmd_by(sess, true);
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if (sess->data_ready)
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send_apple_midi_cmd_by(sess, false);
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sess->sending = false;
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if (!sess->receiving)
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session_stop(sess);
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}
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}
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@ -366,15 +418,12 @@ static void recv_state_changed(void *data, bool started, const char *error)
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pw_log_info("send initiator:%08x state %d", sess->initiator, started);
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if (started) {
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if (!sess->ctrl_ready)
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send_apple_midi_cmd_in(sess, true);
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else if (!sess->data_ready)
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send_apple_midi_cmd_in(sess, false);
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sess->receiving = true;
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session_establish(sess);
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} else {
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if (sess->ctrl_ready)
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send_apple_midi_cmd_by(sess, true);
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if (sess->data_ready)
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send_apple_midi_cmd_by(sess, false);
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sess->receiving = false;
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if (!sess->sending)
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session_stop(sess);
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}
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}
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@ -550,6 +599,7 @@ static void parse_apple_midi_cmd_in(struct impl *impl, bool ctrl, uint8_t *buffe
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sess->ctrl_addr = *sa;
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sess->ctrl_len = salen;
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sess->ctrl_ready = true;
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sess->state = SESSION_STATE_ESTABLISHING;
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}
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}
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else {
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@ -562,6 +612,7 @@ static void parse_apple_midi_cmd_in(struct impl *impl, bool ctrl, uint8_t *buffe
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sess->data_addr = *sa;
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sess->data_len = salen;
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sess->data_ready = true;
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sess->state = SESSION_STATE_ESTABLISHED;
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}
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}
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@ -596,7 +647,7 @@ static void parse_apple_midi_cmd_ok(struct impl *impl, bool ctrl, uint8_t *buffe
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struct session *sess;
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sess = find_session_by_initiator(impl, initiator);
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if (sess == NULL) {
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if (sess == NULL || !sess->we_initiated) {
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pw_log_warn("received OK from nonexisting session %u", initiator);
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return;
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}
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@ -610,6 +661,7 @@ static void parse_apple_midi_cmd_ok(struct impl *impl, bool ctrl, uint8_t *buffe
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pw_log_info("got data OK %08x", initiator);
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sess->remote_ssrc = ntohl(hdr->ssrc);
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sess->data_ready = true;
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sess->state = SESSION_STATE_ESTABLISHED;
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}
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}
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@ -665,6 +717,28 @@ static void parse_apple_midi_cmd_ck(struct impl *impl, bool ctrl, uint8_t *buffe
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send_packet(ctrl ? impl->ctrl_source->fd : impl->data_source->fd, &msg);
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}
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static void parse_apple_midi_cmd_by(struct impl *impl, bool ctrl, uint8_t *buffer,
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ssize_t len, struct sockaddr_storage *sa, socklen_t salen)
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{
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struct rtp_apple_midi *hdr = (struct rtp_apple_midi*)buffer;
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uint32_t initiator = ntohl(hdr->initiator);
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struct session *sess;
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sess = find_session_by_initiator(impl, initiator);
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if (sess == NULL) {
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pw_log_warn("received BY from nonexisting initiator %08x", initiator);
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return;
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}
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if (ctrl) {
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pw_log_info("got ctrl BY %08x %d", initiator, sess->data_ready);
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sess->ctrl_ready = false;
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} else {
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pw_log_info("got data BY %08x", initiator);
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sess->data_ready = false;
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}
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}
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static void parse_apple_midi_cmd(struct impl *impl, bool ctrl, uint8_t *buffer,
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ssize_t len, struct sockaddr_storage *sa, socklen_t salen)
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{
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@ -679,6 +753,9 @@ static void parse_apple_midi_cmd(struct impl *impl, bool ctrl, uint8_t *buffer,
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case APPLE_MIDI_CMD_CK:
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parse_apple_midi_cmd_ck(impl, ctrl, buffer, len, sa, salen);
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break;
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case APPLE_MIDI_CMD_BY:
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parse_apple_midi_cmd_by(impl, ctrl, buffer, len, sa, salen);
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break;
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default:
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break;
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}
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