mirrors/pipewire
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pipewire/pipewire.git synced 2025-11-01 22:58:50 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

module-rtp: parse some more SDP

Browse source
This commit is contained in:
Wim Taymans 2022-10-04 18:12:48 +02:00
parent 38f908e758
commit 14194e137f
1 changed files with 169 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

185
src/modules/module-rtp-source.c
View file

@ -29,6 +29,7 @@
#include <unistd.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <ctype.h>
#include <spa/param/audio/format-utils.h>
#include <spa/utils/hook.h>
@ -229,23 +230,30 @@ static const struct pw_impl_module_events module_events = {
.destroy = module_destroy,
};
static int rtp_source_setup(struct impl *data)
struct sdp_info {
const char *origin;
const char *session;
struct sockaddr_storage sa;
socklen_t salen;
uint16_t port;
uint8_t payload;
struct spa_audio_info_raw info;
};
static int rtp_session_new(struct impl *data, struct sdp_info *sdp)
{
struct spa_audio_info_raw info = { 0 };
const struct spa_pod *params[1];
struct spa_pod_builder b;
uint32_t n_params;
uint8_t buffer[1024];
int res;
info.rate = 44100;
info.channels = 2;
info.format = SPA_AUDIO_FORMAT_F32;
info.position[0] = SPA_AUDIO_CHANNEL_FL;
info.position[1] = SPA_AUDIO_CHANNEL_FR;
data->stride = info.channels * sizeof(float);
data->stride = sdp->info.channels * sizeof(float);
pw_properties_setf(data->playback_props, PW_KEY_NODE_RATE, "1/%d", info.rate);
pw_properties_setf(data->playback_props, PW_KEY_NODE_RATE, "1/%d", sdp->info.rate);
data->playback = pw_stream_new(data->core,
"rtp-source playback", data->playback_props);
@ -260,7 +268,7 @@ static int rtp_source_setup(struct impl *data)
n_params = 0;
spa_pod_builder_init(&b, buffer, sizeof(buffer));
params[n_params++] = spa_format_audio_raw_build(&b, SPA_PARAM_EnumFormat,
&info);
&sdp->info);
if ((res = pw_stream_connect(data->playback,
PW_DIRECTION_OUTPUT,
@ -274,17 +282,158 @@ static int rtp_source_setup(struct impl *data)
return 0;
}
static int parse_sdp(struct impl *impl, const char *sdp)
static int parse_sdp_c(struct impl *impl, char *c, struct sdp_info *info)
{
pw_log_info("%s", sdp);
int res;
c[strcspn(c, "/")] = 0;
if (spa_strstartswith(c, "c=IN IP4 ")) {
struct sockaddr_in *sa = (struct sockaddr_in*) &info->sa;
c += sizeof("c=IN IP4 ");
if (inet_pton(AF_INET, c, &sa->sin_addr) <= 0) {
res = -errno;
pw_log_warn("inet_pton(%s) failed: %m", c);
goto error;
}
sa->sin_family = AF_INET;
info->salen = sizeof(struct sockaddr_in);
}
else if (spa_strstartswith(c, "c=IN IP6 ")) {
struct sockaddr_in6 *sa = (struct sockaddr_in6*) &info->sa;
c += sizeof("c=IN IP6 ");
if (inet_pton(AF_INET6, c, &sa->sin6_addr) <= 0) {
res = -errno;
pw_log_warn("inet_pton(%s) failed: %m", c);
goto error;
}
sa->sin6_family = AF_INET6;
info->salen = sizeof(struct sockaddr_in6);
} else
return -EINVAL;
res= 0;
error:
return res;
}
static int parse_sdp_m(struct impl *impl, char *c, struct sdp_info *info)
{
int port, payload;
if (!spa_strstartswith(c, "m=audio "))
return -EINVAL;
c += sizeof("m=audio ");
if (sscanf(c, "%i RTP/AVP %i", &port, &payload) != 2)
return -EINVAL;
if (port <= 0 || port > 0xFFFF)
return -EINVAL;
if (payload < 0 || payload > 127)
return -EINVAL;
info->port = (uint16_t) port;
info->payload = (uint8_t) payload;
return 0;
}
static int parse_sap(struct impl *impl, const void *data, size_t len)
static int parse_sdp_a(struct impl *impl, char *c, struct sdp_info *info)
{
int payload, len, rate, channels;
if (!spa_strstartswith(c, "a=rtpmap:"))
return 0;
c += sizeof("a=rtpmap:");
if (sscanf(c, "%i %n", &payload, &len) != 1)
return -EINVAL;
if (payload < 0 || payload > 127)
return -EINVAL;
if (payload != info->payload)
return 0;
c += len;
if (spa_strstartswith(c, "L16/")) {
info->info.format = SPA_AUDIO_FORMAT_S16_BE;
c += 4;
} else
return -EINVAL;
if (sscanf(c, "%u/%u", &rate, &channels) == 2) {
info->info.rate = rate;
info->info.channels = channels;
if (channels == 2) {
info->info.position[0] = SPA_AUDIO_CHANNEL_FL;
info->info.position[1] = SPA_AUDIO_CHANNEL_FR;
}
} else if (sscanf(c, "%u", &rate) == 1) {
info->info.rate = rate;
info->info.channels = 1;
} else
return -EINVAL;
return 0;
}
static int parse_sdp(struct impl *impl, char *sdp, struct sdp_info *info)
{
char *s = sdp;
int count = 0, res = 0;
size_t l;
while (*s) {
if ((l = strcspn(s, "\r\n")) < 2)
goto too_short;
s[l] = 0;
pw_log_info("%d: %s", count, s);
if (count++ == 0 && strcmp(s, "v=0") != 0)
goto invalid_version;
if (spa_strstartswith(s, "o="))
info->origin = &s[2];
else if (spa_strstartswith(s, "s="))
info->session = &s[2];
else if (spa_strstartswith(s, "c="))
res = parse_sdp_c(impl, s, info);
else if (spa_strstartswith(s, "m="))
res = parse_sdp_m(impl, s, info);
else if (spa_strstartswith(s, "a="))
res = parse_sdp_a(impl, s, info);
if (res < 0)
goto error;
s += l + 1;
while (isspace(*s))
s++;
}
return 0;
too_short:
pw_log_warn("SDP: line starting with `%.6s...' too short", s);
return -EINVAL;
invalid_version:
pw_log_warn("SDP: invalid first version line `%*s'", (int)l, s);
return -EINVAL;
error:
return res;
}
static int parse_sap(struct impl *impl, void *data, size_t len)
{
struct sap_header *header;
const char *mime;
const char *sdp;
char *mime, *sdp;
struct sdp_info info;
int res;
if (len < 8)
return -EINVAL;
@ -301,7 +450,11 @@ static int parse_sap(struct impl *impl, const void *data, size_t len)
else
return -EINVAL;
return parse_sdp(impl, sdp);
spa_zero(info);
if ((res = parse_sdp(impl, sdp, &info)) < 0)
return res;
return res;
}
static void