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refactor capture with broadcast.

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This commit is contained in:
Miroslav Šedivý
2022-09-17 12:43:17 +02:00
parent 72da075972
commit fd43f84bd0
21 changed files with 1135 additions and 570 deletions
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213
server/internal/capture/gst/gst.c
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@ -1,83 +1,202 @@
#include "gst.h"
typedef struct SampleHandlerUserData {
int pipelineId;
} SampleHandlerUserData;
void gstreamer_init(void) {
gst_init(NULL, NULL);
static void gstreamer_pipeline_log(GstPipelineCtx *ctx, char* level, const char* format, ...) {
va_list argptr;
va_start(argptr, format);
char buffer[100];
vsprintf(buffer, format, argptr);
va_end(argptr);
goPipelineLog(level, buffer, ctx->pipelineId);
}
static gboolean gstreamer_send_bus_call(GstBus *bus, GstMessage *msg, gpointer data) {
static gboolean gstreamer_bus_call(GstBus *bus, GstMessage *msg, gpointer user_data) {
GstPipelineCtx *ctx = (GstPipelineCtx *)user_data;
switch (GST_MESSAGE_TYPE(msg)) {
case GST_MESSAGE_EOS: {
gstreamer_pipeline_log(ctx, "fatal", "end of stream");
break;
}
case GST_MESSAGE_EOS:
g_print("End of stream\n");
exit(1);
break;
case GST_MESSAGE_STATE_CHANGED: {
GstState old_state, new_state;
gst_message_parse_state_changed(msg, &old_state, &new_state, NULL);
case GST_MESSAGE_ERROR: {
gchar *debug;
GError *error;
gstreamer_pipeline_log(ctx, "debug",
"element %s changed state from %s to %s",
GST_OBJECT_NAME(msg->src),
gst_element_state_get_name(old_state),
gst_element_state_get_name(new_state));
break;
}
gst_message_parse_error(msg, &error, &debug);
g_free(debug);
case GST_MESSAGE_TAG: {
GstTagList *tags = NULL;
gst_message_parse_tag(msg, &tags);
g_printerr("Error: %s\n", error->message);
g_error_free(error);
exit(1);
}
default:
break;
gstreamer_pipeline_log(ctx, "debug",
"got tags from element %s",
GST_OBJECT_NAME(msg->src));
gst_tag_list_unref(tags);
break;
}
case GST_MESSAGE_ERROR: {
GError *err = NULL;
gchar *dbg_info = NULL;
gst_message_parse_error(msg, &err, &dbg_info);
gstreamer_pipeline_log(ctx, "error",
"error from element %s: %s",
GST_OBJECT_NAME(msg->src), err->message);
gstreamer_pipeline_log(ctx, "warn",
"debugging info: %s",
(dbg_info) ? dbg_info : "none");
g_error_free(err);
g_free(dbg_info);
break;
}
default:
gstreamer_pipeline_log(ctx, "trace", "unknown message");
break;
}
return TRUE;
}
GstFlowReturn gstreamer_send_new_sample_handler(GstElement *object, gpointer user_data) {
GstPipelineCtx *gstreamer_pipeline_create(char *pipelineStr, int pipelineId, GError **error) {
GstElement *pipeline = gst_parse_launch(pipelineStr, error);
if (pipeline == NULL) return NULL;
// create gstreamer pipeline context
GstPipelineCtx *ctx = calloc(1, sizeof(GstPipelineCtx));
ctx->pipelineId = pipelineId;
ctx->pipeline = pipeline;
GstBus *bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline));
gst_bus_add_watch(bus, gstreamer_bus_call, ctx);
gst_object_unref(bus);
return ctx;
}
static GstFlowReturn gstreamer_send_new_sample_handler(GstElement *object, gpointer user_data) {
GstPipelineCtx *ctx = (GstPipelineCtx *)user_data;
GstSample *sample = NULL;
GstBuffer *buffer = NULL;
gpointer copy = NULL;
gsize copy_size = 0;
SampleHandlerUserData *s = (SampleHandlerUserData *)user_data;
g_signal_emit_by_name (object, "pull-sample", &sample);
g_signal_emit_by_name(object, "pull-sample", &sample);
if (sample) {
buffer = gst_sample_get_buffer(sample);
if (buffer) {
gst_buffer_extract_dup(buffer, 0, gst_buffer_get_size(buffer), &copy, &copy_size);
goHandlePipelineBuffer(copy, copy_size, GST_BUFFER_DURATION(buffer), s->pipelineId);
goHandlePipelineBuffer(copy, copy_size, GST_BUFFER_DURATION(buffer), ctx->pipelineId);
}
gst_sample_unref (sample);
gst_sample_unref(sample);
}
return GST_FLOW_OK;
}
GstElement *gstreamer_send_create_pipeline(char *pipeline, GError **error) {
return gst_parse_launch(pipeline, error);
void gstreamer_pipeline_attach_appsink(GstPipelineCtx *ctx, char *sinkName) {
ctx->appsink = gst_bin_get_by_name(GST_BIN(ctx->pipeline), sinkName);
g_object_set(ctx->appsink, "emit-signals", TRUE, NULL);
g_signal_connect(ctx->appsink, "new-sample", G_CALLBACK(gstreamer_send_new_sample_handler), ctx);
}
void gstreamer_send_start_pipeline(GstElement *pipeline, int pipelineId) {
SampleHandlerUserData *s = calloc(1, sizeof(SampleHandlerUserData));
s->pipelineId = pipelineId;
GstBus *bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline));
gst_bus_add_watch(bus, gstreamer_send_bus_call, NULL);
gst_object_unref(bus);
GstElement *appsink = gst_bin_get_by_name(GST_BIN(pipeline), "appsink");
g_object_set(appsink, "emit-signals", TRUE, NULL);
g_signal_connect(appsink, "new-sample", G_CALLBACK(gstreamer_send_new_sample_handler), s);
gst_object_unref(appsink);
gst_element_set_state(pipeline, GST_STATE_PLAYING);
void gstreamer_pipeline_attach_appsrc(GstPipelineCtx *ctx, char *srcName) {
ctx->appsrc = gst_bin_get_by_name(GST_BIN(ctx->pipeline), srcName);
}
void gstreamer_send_play_pipeline(GstElement *pipeline) {
gst_element_set_state(pipeline, GST_STATE_PLAYING);
void gstreamer_pipeline_play(GstPipelineCtx *ctx) {
gst_element_set_state(GST_ELEMENT(ctx->pipeline), GST_STATE_PLAYING);
}
void gstreamer_send_stop_pipeline(GstElement *pipeline) {
gst_element_set_state(pipeline, GST_STATE_NULL);
void gstreamer_pipeline_pause(GstPipelineCtx *ctx) {
gst_element_set_state(GST_ELEMENT(ctx->pipeline), GST_STATE_PAUSED);
}
void gstreamer_pipeline_destory(GstPipelineCtx *ctx) {
// end appsrc, if exists
if (ctx->appsrc) {
gst_app_src_end_of_stream(GST_APP_SRC(ctx->appsrc));
}
// send pipeline eos
gst_element_send_event(GST_ELEMENT(ctx->pipeline), gst_event_new_eos());
// set null state
gst_element_set_state(GST_ELEMENT(ctx->pipeline), GST_STATE_NULL);
if (ctx->appsink) {
gst_object_unref(ctx->appsink);
ctx->appsink = NULL;
}
if (ctx->appsrc) {
gst_object_unref(ctx->appsrc);
ctx->appsrc = NULL;
}
gst_object_unref(ctx->pipeline);
}
void gstreamer_pipeline_push(GstPipelineCtx *ctx, void *buffer, int bufferLen) {
if (ctx->appsrc != NULL) {
gpointer p = g_memdup(buffer, bufferLen);
GstBuffer *buffer = gst_buffer_new_wrapped(p, bufferLen);
gst_app_src_push_buffer(GST_APP_SRC(ctx->appsrc), buffer);
}
}
gboolean gstreamer_pipeline_set_prop_int(GstPipelineCtx *ctx, char *binName, char *prop, gint value) {
GstElement *el = gst_bin_get_by_name(GST_BIN(ctx->pipeline), binName);
if (el == NULL) return FALSE;
g_object_set(G_OBJECT(el),
prop, value,
NULL);
gst_object_unref(el);
return TRUE;
}
gboolean gstreamer_pipeline_set_caps_framerate(GstPipelineCtx *ctx, const gchar* binName, gint numerator, gint denominator) {
GstElement *el = gst_bin_get_by_name(GST_BIN(ctx->pipeline), binName);
if (el == NULL) return FALSE;
GstCaps *caps = gst_caps_new_simple("video/x-raw",
"framerate", GST_TYPE_FRACTION, numerator, denominator,
NULL);
g_object_set(G_OBJECT(el),
"caps", caps,
NULL);
gst_caps_unref(caps);
gst_object_unref(el);
return TRUE;
}
gboolean gstreamer_pipeline_set_caps_resolution(GstPipelineCtx *ctx, const gchar* binName, gint width, gint height) {
GstElement *el = gst_bin_get_by_name(GST_BIN(ctx->pipeline), binName);
if (el == NULL) return FALSE;
GstCaps *caps = gst_caps_new_simple("video/x-raw",
"width", G_TYPE_INT, width,
"height", G_TYPE_INT, height,
NULL);
g_object_set(G_OBJECT(el),
"caps", caps,
NULL);
gst_caps_unref(caps);
gst_object_unref(el);
return TRUE;
}