mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Add playback tutorial 5
This commit is contained in:
Xavi Artigas
parent
69b6590d03
commit
b2fb2d10cc
4 changed files with 295 additions and 0 deletions
182
gst-sdk/tutorials/playback-tutorial-5.c
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182
gst-sdk/tutorials/playback-tutorial-5.c
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#include <string.h>
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#include <gst/gst.h>
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#include <gst/interfaces/colorbalance.h>
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typedef struct _CustomData {
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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_DEINTERLACE = (1 << 9)
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} GstPlayFlags;
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/* Process a color balance command */
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static void update_color_channel (const gchar *channel_name, gboolean increase, GstColorBalance *cb) {
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gdouble step;
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gint value;
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GstColorBalanceChannel *channel = NULL;
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const GList *channels, *l;
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/* Retrieve the list of channels and locate the requested one */
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channels = gst_color_balance_list_channels (cb);
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for (l = channels; l != NULL; l = l->next) {
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GstColorBalanceChannel *tmp = (GstColorBalanceChannel *)l->data;
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if (g_strrstr (tmp->label, channel_name)) {
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channel = tmp;
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break;
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}
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}
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if (!channel)
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return;
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/* Change the channel's value */
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step = 0.1 * (channel->max_value - channel->min_value);
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value = gst_color_balance_get_value (cb, channel);
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if (increase) {
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value += step;
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if (value > channel->max_value)
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value = channel->max_value;
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} else {
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value -= step;
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if (value < channel->min_value)
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value = channel->min_value;
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}
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gst_color_balance_set_value (cb, channel, value);
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}
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/* Toggle the deinterlacing flag */
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static void toggle_deinterlace (GstElement *pipeline) {
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gint flags;
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gint64 current_position = GST_CLOCK_TIME_NONE;
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GstFormat format = GST_FORMAT_TIME;
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/* Find current position, since it will be lost when we stop */
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gst_element_query_position (pipeline, &format, ¤t_position);
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/* Stop */
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gst_element_set_state (pipeline, GST_STATE_READY);
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/* Toggle deinterlacing flag (it will be ignored while PLAYING) */
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g_object_get (pipeline, "flags", &flags, NULL);
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flags ^= GST_PLAY_FLAG_DEINTERLACE;
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g_object_set (pipeline, "flags", flags, NULL);
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/* Resume */
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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/* Wait until the state change takes effect */
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gst_element_get_state (pipeline, NULL, NULL, GST_CLOCK_TIME_NONE);
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/* Set current position, if we were able to recover it previously */
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if (GST_CLOCK_TIME_IS_VALID (current_position)) {
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gst_element_seek_simple (pipeline, format, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE, current_position);
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}
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}
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/* Output the current values of all Color Balance channels and the Deinterlace flag */
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static void print_current_values (GstElement *pipeline) {
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gint flags;
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const GList *channels, *l;
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/* Output Color Balance values */
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channels = gst_color_balance_list_channels (GST_COLOR_BALANCE (pipeline));
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for (l = channels; l != NULL; l = l->next) {
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GstColorBalanceChannel *channel = (GstColorBalanceChannel *)l->data;
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gint value = gst_color_balance_get_value (GST_COLOR_BALANCE (pipeline), channel);
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g_print ("%s: %3d%% ", channel->label,
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100 * (value - channel->min_value) / (channel->max_value - channel->min_value));
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}
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/* Output Deinterlace flag value */
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g_object_get (pipeline, "flags", &flags, NULL);
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g_print ("Deinterlacing: %s\n", flags & GST_PLAY_FLAG_DEINTERLACE ? "ON" : "OFF");
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}
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/* Process keyboard input */
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static gboolean handle_keyboard (GIOChannel *source, GIOCondition cond, CustomData *data) {
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gchar *str = NULL;
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if (!g_io_channel_read_line (source, &str, NULL, NULL, NULL) == G_IO_STATUS_NORMAL) {
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return TRUE;
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}
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switch (g_ascii_tolower (str[0])) {
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case 'c':
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update_color_channel ("CONTRAST", g_ascii_isupper (str[0]), GST_COLOR_BALANCE (data->pipeline));
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break;
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case 'b':
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update_color_channel ("BRIGHTNESS", g_ascii_isupper (str[0]), GST_COLOR_BALANCE (data->pipeline));
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break;
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case 'h':
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update_color_channel ("HUE", g_ascii_isupper (str[0]), GST_COLOR_BALANCE (data->pipeline));
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break;
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case 's':
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update_color_channel ("SATURATION", g_ascii_isupper (str[0]), GST_COLOR_BALANCE (data->pipeline));
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break;
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case 'd':
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toggle_deinterlace (data->pipeline);
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break;
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case 'q':
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g_main_loop_quit (data->loop);
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break;
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default:
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break;
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}
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g_free (str);
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print_current_values (data->pipeline);
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return TRUE;
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}
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int main(int argc, char *argv[]) {
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CustomData data;
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GstStateChangeReturn ret;
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GIOChannel *io_stdin;
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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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/* Print usage map */
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g_print (
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"USAGE: Choose one of the following options, then press enter:\n"
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" 'C' to increase contrast, 'c' to decrease contrast\n"
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" 'B' to increase brightness, 'b' to decrease brightness\n"
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" 'H' to increase hue, 'h' to decrease hue\n"
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" 'S' to increase saturation, 's' to decrease saturation\n"
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" 'D' to toggle deinterlacing ON and OFF\n"
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" 'Q' to quit\n");
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/* Build the pipeline */
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data.pipeline = gst_parse_launch ("playbin2 uri=http://docs.gstreamer.com/media/sintel_trailer-480i.avi", NULL);
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/* Add a keyboard watch so we get notified of keystrokes */
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#ifdef _WIN32
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io_stdin = g_io_channel_win32_new_fd (fileno (stdin));
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#else
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io_stdin = g_io_channel_unix_new (fileno (stdin));
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#endif
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g_io_add_watch (io_stdin, G_IO_IN, (GIOFunc)handle_keyboard, &data);
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/* Start playing */
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ret = gst_element_set_state (data.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 (data.pipeline);
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return -1;
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}
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print_current_values (data.pipeline);
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/* Create a GLib Main Loop and set it to run */
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data.loop = g_main_loop_new (NULL, FALSE);
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g_main_loop_run (data.loop);
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/* Free resources */
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g_main_loop_unref (data.loop);
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g_io_channel_unref (io_stdin);
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gst_element_set_state (data.pipeline, GST_STATE_NULL);
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gst_object_unref (data.pipeline);
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return 0;
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}
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@ -0,0 +1,97 @@
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<?xml version="1.0" encoding="utf-8"?>
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<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<ItemGroup Label="ProjectConfigurations">
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<ProjectConfiguration Include="Debug|Win32">
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<Configuration>Debug</Configuration>
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<Platform>Win32</Platform>
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</ProjectConfiguration>
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<ProjectConfiguration Include="Debug|x64">
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<Configuration>Debug</Configuration>
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<Platform>x64</Platform>
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</ProjectConfiguration>
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<ProjectConfiguration Include="Release|Win32">
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<Configuration>Release</Configuration>
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<Platform>Win32</Platform>
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</ProjectConfiguration>
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<ProjectConfiguration Include="Release|x64">
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<Configuration>Release</Configuration>
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<Platform>x64</Platform>
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</ProjectConfiguration>
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</ItemGroup>
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<ItemGroup>
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<ClCompile Include="..\..\playback-tutorial-5.c" />
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</ItemGroup>
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<PropertyGroup Label="Globals">
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<Keyword>Win32Proj</Keyword>
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<ProjectGuid>{57F94395-E9A1-430E-AF28-165FD9BE0872}</ProjectGuid>
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<TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
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</PropertyGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
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<PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>true</UseDebugLibraries>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>false</UseDebugLibraries>
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<WholeProgramOptimization>true</WholeProgramOptimization>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
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<ImportGroup Label="ExtensionSettings">
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</ImportGroup>
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<ImportGroup Label="PropertySheets" Condition="'$(Platform)'=='Win32'">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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<Import Project="$(GSTREAMER_SDK_ROOT_X86)\share\vs\2010\libs\gstreamer-0.10.props" Condition="exists('$(GSTREAMER_SDK_ROOT_X86)\share\vs\2010\libs\gstreamer-0.10.props')" />
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<Import Project="$(GSTREAMER_SDK_ROOT_X86)\share\vs\2010\libs\gstreamer-interfaces-0.10.props" Condition="exists('$(GSTREAMER_SDK_ROOT_X86)\share\vs\2010\libs\gstreamer-interfaces-0.10.props')" />
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<Import Project="$(GSTREAMER_SDK_ROOT_X86)\share\vs\2010\msvc\x86.props" Condition="exists('$(GSTREAMER_SDK_ROOT_X86)\share\vs\2010\msvc\x86.props')" />
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</ImportGroup>
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<ImportGroup Label="PropertySheets" Condition="'$(Platform)'=='x64'">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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<Import Project="$(GSTREAMER_SDK_ROOT_X86_64)\share\vs\2010\libs\gstreamer-0.10.props" Condition="exists('$(GSTREAMER_SDK_ROOT_X86_64)\share\vs\2010\libs\gstreamer-0.10.props')" />
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<Import Project="$(GSTREAMER_SDK_ROOT_X86_64)\share\vs\2010\libs\gstreamer-interfaces-0.10.props" Condition="exists('$(GSTREAMER_SDK_ROOT_X86_64)\share\vs\2010\libs\gstreamer-interfaces-0.10.props')" />
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<Import Project="$(GSTREAMER_SDK_ROOT_X86_64)\share\vs\2010\msvc\x86_64.props" Condition="exists('$(GSTREAMER_SDK_ROOT_X86_64)\share\vs\2010\msvc\x86_64.props')" />
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</ImportGroup>
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<PropertyGroup Label="UserMacros" />
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<PropertyGroup Condition="'$(Configuration)'=='Debug'">
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<LinkIncremental>true</LinkIncremental>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)'=='Release'">
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<LinkIncremental>false</LinkIncremental>
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</PropertyGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)'=='Debug'">
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<ClCompile>
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<PrecompiledHeader>
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</PrecompiledHeader>
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<WarningLevel>Level3</WarningLevel>
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<Optimization>Disabled</Optimization>
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<PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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</ClCompile>
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<Link>
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<SubSystem>Console</SubSystem>
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<GenerateDebugInformation>true</GenerateDebugInformation>
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<AdditionalDependencies>%(AdditionalDependencies)</AdditionalDependencies>
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<AdditionalLibraryDirectories>%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
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</Link>
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</ItemDefinitionGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)'=='Release'">
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<ClCompile>
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<WarningLevel>Level3</WarningLevel>
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<PrecompiledHeader>
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</PrecompiledHeader>
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<Optimization>MaxSpeed</Optimization>
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<FunctionLevelLinking>true</FunctionLevelLinking>
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<IntrinsicFunctions>true</IntrinsicFunctions>
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<PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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</ClCompile>
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<Link>
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<SubSystem>Console</SubSystem>
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<GenerateDebugInformation>false</GenerateDebugInformation>
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<EnableCOMDATFolding>true</EnableCOMDATFolding>
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</Link>
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</ItemDefinitionGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
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<ImportGroup Label="ExtensionTargets">
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</ImportGroup>
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</Project>
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@ -0,0 +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="..\..\playback-tutorial-5.c" />
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</ItemGroup>
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</Project>
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@ -29,6 +29,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "playback-tutorial-4", "play
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EndProject
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "playback-tutorial-3", "playback-tutorial-3\playback-tutorial-3.vcxproj", "{B84F4F87-E804-456C-874E-AC76E0116268}"
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EndProject
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "playback-tutorial-5", "playback-tutorial-5\playback-tutorial-5.vcxproj", "{57F94395-E9A1-430E-AF28-165FD9BE0872}"
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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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@ -149,6 +151,14 @@ Global
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{B84F4F87-E804-456C-874E-AC76E0116268}.Release|Win32.Build.0 = Release|Win32
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{B84F4F87-E804-456C-874E-AC76E0116268}.Release|x64.ActiveCfg = Release|x64
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{B84F4F87-E804-456C-874E-AC76E0116268}.Release|x64.Build.0 = Release|x64
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{57F94395-E9A1-430E-AF28-165FD9BE0872}.Debug|Win32.ActiveCfg = Debug|Win32
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{57F94395-E9A1-430E-AF28-165FD9BE0872}.Debug|Win32.Build.0 = Debug|Win32
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{57F94395-E9A1-430E-AF28-165FD9BE0872}.Debug|x64.ActiveCfg = Debug|x64
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{57F94395-E9A1-430E-AF28-165FD9BE0872}.Debug|x64.Build.0 = Debug|x64
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{57F94395-E9A1-430E-AF28-165FD9BE0872}.Release|Win32.ActiveCfg = Release|Win32
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{57F94395-E9A1-430E-AF28-165FD9BE0872}.Release|Win32.Build.0 = Release|Win32
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{57F94395-E9A1-430E-AF28-165FD9BE0872}.Release|x64.ActiveCfg = Release|x64
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{57F94395-E9A1-430E-AF28-165FD9BE0872}.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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