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https://gitlab.freedesktop.org/pipewire/pipewire.git
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pw-loopback: implement with the module
Implement pw-loopback by loading the module-loopback. Fixes #1061
This commit is contained in:
Wim Taymans
parent
7d79c71178
commit
c52637f783
1 changed files with 77 additions and 128 deletions
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@ -34,8 +34,10 @@
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#include <spa/pod/builder.h>
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#include <spa/param/audio/format-utils.h>
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#include <spa/param/audio/raw.h>
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#include <spa/utils/json.h>
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#include <pipewire/pipewire.h>
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#include <pipewire/impl.h>
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#define DEFAULT_RATE 48000
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#define DEFAULT_CHANNELS 2
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@ -45,8 +47,8 @@ struct data {
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struct pw_main_loop *loop;
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struct pw_context *context;
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struct pw_core *core;
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struct spa_hook core_listener;
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struct pw_impl_module *module;
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struct spa_hook module_listener;
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const char *opt_group_name;
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const char *opt_channel_map;
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@ -55,113 +57,7 @@ struct data {
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uint32_t latency;
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struct pw_properties *capture_props;
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struct pw_stream *capture;
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struct spa_hook capture_listener;
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struct pw_properties *playback_props;
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struct pw_stream *playback;
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struct spa_hook playback_listener;
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};
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static void capture_process(void *d)
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{
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struct data *data = d;
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struct pw_buffer *in, *out;
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if ((in = pw_stream_dequeue_buffer(data->capture)) == NULL)
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pw_log_warn("out of capture buffers: %m");
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if ((out = pw_stream_dequeue_buffer(data->playback)) == NULL)
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pw_log_warn("out of playback buffers: %m");
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if (in != NULL && out != NULL)
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*out->buffer = *in->buffer;
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if (in != NULL)
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pw_stream_queue_buffer(data->capture, in);
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if (out != NULL)
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pw_stream_queue_buffer(data->playback, out);
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}
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static const struct pw_stream_events in_stream_events = {
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PW_VERSION_STREAM_EVENTS,
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.process = capture_process
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};
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static const struct pw_stream_events out_stream_events = {
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PW_VERSION_STREAM_EVENTS,
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};
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static int setup_streams(struct data *data)
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{
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int res;
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uint32_t n_params;
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const struct spa_pod *params[1];
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uint8_t buffer[1024];
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struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
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data->capture = pw_stream_new(data->core,
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"loopback capture", data->capture_props);
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data->capture_props = NULL;
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if (data->capture == NULL)
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return -errno;
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pw_stream_add_listener(data->capture,
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&data->capture_listener,
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&in_stream_events, data);
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data->playback = pw_stream_new(data->core,
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"loopback playback", data->playback_props);
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data->playback_props = NULL;
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if (data->playback == NULL)
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return -errno;
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pw_stream_add_listener(data->playback,
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&data->playback_listener,
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&out_stream_events, data);
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n_params = 0;
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params[n_params++] = spa_format_audio_raw_build(&b, SPA_PARAM_EnumFormat,
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&SPA_AUDIO_INFO_RAW_INIT(
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.flags = SPA_AUDIO_FLAG_UNPOSITIONED,
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.format = SPA_AUDIO_FORMAT_F32P,
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.channels = data->channels));
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if ((res = pw_stream_connect(data->capture,
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PW_DIRECTION_INPUT,
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PW_ID_ANY,
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PW_STREAM_FLAG_AUTOCONNECT |
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PW_STREAM_FLAG_MAP_BUFFERS |
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PW_STREAM_FLAG_RT_PROCESS,
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params, n_params)) < 0)
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return res;
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if ((res = pw_stream_connect(data->playback,
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PW_DIRECTION_OUTPUT,
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PW_ID_ANY,
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PW_STREAM_FLAG_AUTOCONNECT |
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PW_STREAM_FLAG_MAP_BUFFERS |
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PW_STREAM_FLAG_RT_PROCESS,
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params, n_params)) < 0)
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return res;
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return 0;
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}
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static void on_core_error(void *data, uint32_t id, int seq, int res, const char *message)
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{
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struct data *d = data;
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pw_log_error("error id:%u seq:%d res:%d (%s): %s",
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id, seq, res, spa_strerror(res), message);
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if (id == PW_ID_CORE && res == -EPIPE)
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pw_main_loop_quit(d->loop);
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}
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static const struct pw_core_events core_events = {
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PW_VERSION_CORE_EVENTS,
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.error = on_core_error,
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};
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static void do_quit(void *data, int signal_number)
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@ -170,6 +66,43 @@ static void do_quit(void *data, int signal_number)
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pw_main_loop_quit(d->loop);
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}
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static void module_destroy(void *data)
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{
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struct data *d = data;
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spa_hook_remove(&d->module_listener);
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d->module = NULL;
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pw_main_loop_quit(d->loop);
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}
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static const struct pw_impl_module_events module_events = {
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PW_VERSION_IMPL_MODULE_EVENTS,
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.destroy = module_destroy
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};
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static void serialize_dict(FILE *f, const struct spa_dict *dict)
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{
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const struct spa_dict_item *it;
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fprintf(f, "{");
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spa_dict_for_each(it, dict) {
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size_t len = it->value ? strlen(it->value) : 0;
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fprintf(f, " \"%s\" = ", it->key);
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if (it->value == NULL) {
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fprintf(f, "null");
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} else if ( spa_json_is_null(it->value, len) ||
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spa_json_is_float(it->value, len) ||
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spa_json_is_object(it->value, len)) {
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fprintf(f, "%s", it->value);
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} else {
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size_t size = (len+1) * 4;
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char str[size];
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spa_json_encode_string(str, size, it->value);
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fprintf(f, "%s", str);
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}
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}
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fprintf(f, " }");
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}
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static void show_help(struct data *data, const char *name)
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{
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fprintf(stdout, "%s [options]\n"
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@ -196,6 +129,9 @@ int main(int argc, char *argv[])
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struct pw_loop *l;
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const char *opt_remote = NULL;
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char cname[256];
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char *args;
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size_t size;
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FILE *f;
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static const struct option long_options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, 'V' },
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@ -288,39 +224,52 @@ int main(int argc, char *argv[])
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goto exit;
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}
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f = open_memstream(&args, &size);
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fprintf(f, "{");
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if (opt_remote != NULL)
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fprintf(f, " remote.name = \"%s\"", opt_remote);
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if (data.latency != 0)
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fprintf(f, " node.latency = %u/%u", data.latency, DEFAULT_RATE);
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if (data.channels != 0)
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fprintf(f, " audio.channels = %u", data.channels);
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if (data.opt_channel_map != NULL)
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fprintf(f, " audio.position = %s", data.opt_channel_map);
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if (data.opt_group_name != NULL) {
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pw_properties_set(data.capture_props, PW_KEY_NODE_GROUP, data.opt_group_name);
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pw_properties_set(data.playback_props, PW_KEY_NODE_GROUP, data.opt_group_name);
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}
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if (data.latency != 0) {
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pw_properties_setf(data.capture_props, PW_KEY_NODE_LATENCY, "%u/%u",
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data.latency, DEFAULT_RATE);
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pw_properties_setf(data.playback_props, PW_KEY_NODE_LATENCY, "%u/%u",
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data.latency, DEFAULT_RATE);
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}
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data.core = pw_context_connect(data.context,
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pw_properties_new(
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PW_KEY_REMOTE_NAME, opt_remote,
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NULL),
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0);
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if (data.core == NULL) {
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fprintf(stderr, "can't connect: %m\n");
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fprintf(f, " capture.props = ");
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serialize_dict(f, &data.capture_props->dict);
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fprintf(f, " playback.props = ");
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serialize_dict(f, &data.playback_props->dict);
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fprintf(f, " }");
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fclose(f);
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pw_log_info("loading module with %s", args);
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data.module = pw_context_load_module(data.context,
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"libpipewire-module-loopback", args,
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NULL);
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free(args);
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if (data.module == NULL) {
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fprintf(stderr, "can't load module: %m\n");
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goto exit;
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}
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pw_core_add_listener(data.core,
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&data.core_listener,
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&core_events, &data);
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setup_streams(&data);
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pw_impl_module_add_listener(data.module,
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&data.module_listener, &module_events, &data);
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pw_main_loop_run(data.loop);
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res = 0;
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exit:
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if (data.core)
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pw_core_disconnect(data.core);
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if (data.module)
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pw_impl_module_destroy(data.module);
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if (data.context)
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pw_context_destroy(data.context);
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if (data.loop)
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