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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Added tutorial 12
This commit is contained in:
Xavi Artigas
parent
0ccd90d99a
commit
5569f41783
4 changed files with 122 additions and 2 deletions
110
gst-sdk/tutorials/basic-tutorial-12.c
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110
gst-sdk/tutorials/basic-tutorial-12.c
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@ -0,0 +1,110 @@
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#include <gst/gst.h>
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#include <string.h>
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typedef struct _CustomData {
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gboolean is_live;
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GstElement *pipeline;
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GMainLoop *loop;
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} CustomData;
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/* playbin2 flags */
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typedef enum {
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GST_PLAY_FLAG_BUFFERING = (1 << 8) /* We want to allow buffering */
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} GstPlayFlags;
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static void cb_message (GstBus *bus, GstMessage *msg, CustomData *data) {
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switch (GST_MESSAGE_TYPE (msg)) {
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case GST_MESSAGE_ERROR: {
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GError *err;
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gchar *debug;
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gst_message_parse_error (msg, &err, &debug);
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g_print ("Error: %s\n", err->message);
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g_error_free (err);
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g_free (debug);
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gst_element_set_state (data->pipeline, GST_STATE_READY);
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g_main_loop_quit (data->loop);
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break;
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}
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case GST_MESSAGE_EOS:
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/* end-of-stream */
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gst_element_set_state (data->pipeline, GST_STATE_READY);
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g_main_loop_quit (data->loop);
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break;
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case GST_MESSAGE_CLOCK_LOST:
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/* Get a new clock */
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gst_element_set_state (data->pipeline, GST_STATE_PAUSED);
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gst_element_set_state (data->pipeline, GST_STATE_PLAYING);
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break;
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case GST_MESSAGE_BUFFERING: {
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gint percent = 0;
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/* If the stream is live, we do not care about buffering. */
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if (data->is_live) break;
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gst_message_parse_buffering (msg, &percent);
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g_print ("Buffering (%3d%%)\r", percent);
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/* Wait until buffering is complete before start/resume playing */
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if (percent < 100)
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gst_element_set_state (data->pipeline, GST_STATE_PAUSED);
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else
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gst_element_set_state (data->pipeline, GST_STATE_PLAYING);
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break;
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}
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default:
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/* Unhandled message */
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break;
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}
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}
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int main(int argc, char *argv[]) {
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GstElement *pipeline;
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GstBus *bus;
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GstStateChangeReturn ret;
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GMainLoop *main_loop;
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CustomData data;
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guint flags;
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/* Initialize GStreamer */
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gst_init (&argc, &argv);
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/* Initialize our data structure */
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memset (&data, 0, sizeof (data));
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/* Build the pipeline */
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pipeline = gst_parse_launch ("playbin2 uri=http://docs.gstreamer.com/media/sintel_trailer-480p.webm", NULL);
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bus = gst_element_get_bus (pipeline);
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/* Set the buffering flag */
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g_object_get (pipeline, "flags", &flags, NULL);
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flags |= GST_PLAY_FLAG_BUFFERING;
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g_object_set (pipeline, "flags", flags, NULL);
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/* Start playing */
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ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
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if (ret == GST_STATE_CHANGE_FAILURE) {
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g_printerr ("Unable to set the pipeline to the playing state.\n");
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gst_object_unref (pipeline);
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return -1;
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} else if (ret == GST_STATE_CHANGE_NO_PREROLL) {
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data.is_live = TRUE;
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}
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main_loop = g_main_loop_new (NULL, FALSE);
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data.loop = main_loop;
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data.pipeline = pipeline;
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gst_bus_add_signal_watch (bus);
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g_signal_connect (bus, "message", G_CALLBACK (cb_message), &data);
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g_main_loop_run (main_loop);
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/* Free resources */
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g_main_loop_unref (main_loop);
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gst_object_unref (bus);
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_object_unref (pipeline);
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return 0;
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}
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@ -19,7 +19,7 @@
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</ProjectConfiguration>
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</ItemGroup>
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<ItemGroup>
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<ClCompile Include="..\..\basic-tutorial-10.c" />
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<ClCompile Include="..\..\basic-tutorial-12.c" />
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</ItemGroup>
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<PropertyGroup Label="Globals">
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<Keyword>Win32Proj</Keyword>
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@ -1,6 +1,6 @@
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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<ItemGroup>
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<ClCompile Include="..\..\basic-tutorial-10.c" />
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<ClCompile Include="..\..\basic-tutorial-12.c" />
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</ItemGroup>
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</Project>
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@ -23,6 +23,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "playback-tutorial-2", "play
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EndProject
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "basic-tutorial-9", "basic-tutorial-9\basic-tutorial-9.vcxproj", "{7B61F2C6-5202-48B7-8589-164F81BC636C}"
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EndProject
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "basic-tutorial-12", "basic-tutorial-12\basic-tutorial-12.vcxproj", "{A2E63C29-3375-4930-B7D3-2F23EC824EAF}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Win32 = Debug|Win32
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@ -119,6 +121,14 @@ Global
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{7B61F2C6-5202-48B7-8589-164F81BC636C}.Release|Win32.Build.0 = Release|Win32
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{7B61F2C6-5202-48B7-8589-164F81BC636C}.Release|x64.ActiveCfg = Release|x64
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{7B61F2C6-5202-48B7-8589-164F81BC636C}.Release|x64.Build.0 = Release|x64
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{A2E63C29-3375-4930-B7D3-2F23EC824EAF}.Debug|Win32.ActiveCfg = Debug|Win32
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{A2E63C29-3375-4930-B7D3-2F23EC824EAF}.Debug|Win32.Build.0 = Debug|Win32
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{A2E63C29-3375-4930-B7D3-2F23EC824EAF}.Debug|x64.ActiveCfg = Debug|x64
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{A2E63C29-3375-4930-B7D3-2F23EC824EAF}.Debug|x64.Build.0 = Debug|x64
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{A2E63C29-3375-4930-B7D3-2F23EC824EAF}.Release|Win32.ActiveCfg = Release|Win32
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{A2E63C29-3375-4930-B7D3-2F23EC824EAF}.Release|Win32.Build.0 = Release|Win32
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{A2E63C29-3375-4930-B7D3-2F23EC824EAF}.Release|x64.ActiveCfg = Release|x64
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{A2E63C29-3375-4930-B7D3-2F23EC824EAF}.Release|x64.Build.0 = Release|x64
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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