Remove unused attachments

attachments/2424843.c

@@ -1,99 +0,0 @@
-#include <gst/gst.h>
-#include <string.h>
-  
-typedef struct _CustomData {
-  gboolean is_live;
-  GstElement *pipeline;
-  GMainLoop *loop;
-} CustomData;
-  
-static void cb_message (GstBus *bus, GstMessage *msg, CustomData *data) {
-  
-  switch (GST_MESSAGE_TYPE (msg)) {
-    case GST_MESSAGE_ERROR: {
-      GError *err;
-      gchar *debug;
-      
-      gst_message_parse_error (msg, &err, &debug);
-      g_print ("Error: %s\n", err->message);
-      g_error_free (err);
-      g_free (debug);
-      
-      gst_element_set_state (data->pipeline, GST_STATE_READY);
-      g_main_loop_quit (data->loop);
-      break;
-    }
-    case GST_MESSAGE_EOS:
-      /* end-of-stream */
-      gst_element_set_state (data->pipeline, GST_STATE_READY);
-      g_main_loop_quit (data->loop);
-      break;
-    case GST_MESSAGE_BUFFERING: {
-      gint percent = 0;
-      
-      /* If the stream is live, we do not care about buffering. */
-      if (data->is_live) break;
-      
-      gst_message_parse_buffering (msg, &percent);
-      g_print ("Buffering (%3d%%)\r", percent);
-      /* Wait until buffering is complete before start/resume playing */
-      if (percent < 100)
-        gst_element_set_state (data->pipeline, GST_STATE_PAUSED);
-      else
-        gst_element_set_state (data->pipeline, GST_STATE_PLAYING);
-      break;
-    }
-    case GST_MESSAGE_CLOCK_LOST:
-      /* Get a new clock */
-      gst_element_set_state (data->pipeline, GST_STATE_PAUSED);
-      gst_element_set_state (data->pipeline, GST_STATE_PLAYING);
-      break;
-    default:
-      /* Unhandled message */
-      break;
-    }
-}
-  
-int main(int argc, char *argv[]) {
-  GstElement *pipeline;
-  GstBus *bus;
-  GstStateChangeReturn ret;
-  GMainLoop *main_loop;
-  CustomData data;
-  
-  /* Initialize GStreamer */
-  gst_init (&argc, &argv);
-  
-  /* Initialize our data structure */
-  memset (&data, 0, sizeof (data));
-  
-  /* Build the pipeline */
-  pipeline = gst_parse_launch ("playbin uri=http://docs.gstreamer.com/media/sintel_trailer-480p.webm", NULL);
-  bus = gst_element_get_bus (pipeline);
-  
-  /* Start playing */
-  ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
-  if (ret == GST_STATE_CHANGE_FAILURE) {
-    g_printerr ("Unable to set the pipeline to the playing state.\n");
-    gst_object_unref (pipeline);
-    return -1;
-  } else if (ret == GST_STATE_CHANGE_NO_PREROLL) {
-    data.is_live = TRUE;
-  }
-  
-  main_loop = g_main_loop_new (NULL, FALSE);
-  data.loop = main_loop;
-  data.pipeline = pipeline;
-  
-  gst_bus_add_signal_watch (bus);
-  g_signal_connect (bus, "message", G_CALLBACK (cb_message), &data);
-  
-  g_main_loop_run (main_loop);
-  
-  /* Free resources */
-  g_main_loop_unref (main_loop);
-  gst_object_unref (bus);
-  gst_element_set_state (pipeline, GST_STATE_NULL);
-  gst_object_unref (pipeline);
-  return 0;
-}

attachments/2424846.c

@@ -1,172 +0,0 @@
-#include <gst/gst.h>
-#include <string.h>
-  
-#define GRAPH_LENGTH 80
-  
-/* playbin flags */
-typedef enum {
-  GST_PLAY_FLAG_DOWNLOAD      = (1 << 7) /* Enable progressive download (on selected formats) */
-} GstPlayFlags;
-  
-typedef struct _CustomData {
-  gboolean is_live;
-  GstElement *pipeline;
-  GMainLoop *loop;
-  gint buffering_level;
-} CustomData;
-  
-static void got_location (GstObject *gstobject, GstObject *prop_object, GParamSpec *prop, gpointer data) {
-  gchar *location;
-  g_object_get (G_OBJECT (prop_object), "temp-location", &location, NULL);
-  g_print ("Temporary file: %s\n", location);
-  /* Uncomment this line to keep the temporary file after the program exits */
-  /* g_object_set (G_OBJECT (prop_object), "temp-remove", FALSE, NULL); */
-}
-  
-static void cb_message (GstBus *bus, GstMessage *msg, CustomData *data) {
-  
-  switch (GST_MESSAGE_TYPE (msg)) {
-    case GST_MESSAGE_ERROR: {
-      GError *err;
-      gchar *debug;
-      
-      gst_message_parse_error (msg, &err, &debug);
-      g_print ("Error: %s\n", err->message);
-      g_error_free (err);
-      g_free (debug);
-      
-      gst_element_set_state (data->pipeline, GST_STATE_READY);
-      g_main_loop_quit (data->loop);
-      break;
-    }
-    case GST_MESSAGE_EOS:
-      /* end-of-stream */
-      gst_element_set_state (data->pipeline, GST_STATE_READY);
-      g_main_loop_quit (data->loop);
-      break;
-    case GST_MESSAGE_BUFFERING:
-      /* If the stream is live, we do not care about buffering. */
-      if (data->is_live) break;
-      
-      gst_message_parse_buffering (msg, &data->buffering_level);
-      
-      /* Wait until buffering is complete before start/resume playing */
-      if (data->buffering_level < 100)
-        gst_element_set_state (data->pipeline, GST_STATE_PAUSED);
-      else
-        gst_element_set_state (data->pipeline, GST_STATE_PLAYING);
-      break;
-    case GST_MESSAGE_CLOCK_LOST:
-      /* Get a new clock */
-      gst_element_set_state (data->pipeline, GST_STATE_PAUSED);
-      gst_element_set_state (data->pipeline, GST_STATE_PLAYING);
-      break;
-    default:
-      /* Unhandled message */
-      break;
-    }
-}
-  
-static gboolean refresh_ui (CustomData *data) {
-  GstQuery *query;
-  gboolean result;
-  
-  query = gst_query_new_buffering (GST_FORMAT_PERCENT);
-  result = gst_element_query (data->pipeline, query);
-  if (result) {
-    gint n_ranges, range, i;
-    gchar graph[GRAPH_LENGTH + 1];
-    GstFormat format = GST_FORMAT_TIME;
-    gint64 position = 0, duration = 0;
-    
-    memset (graph, ' ', GRAPH_LENGTH);
-    graph[GRAPH_LENGTH] = '\0';
-    
-    n_ranges = gst_query_get_n_buffering_ranges (query);
-    for (range = 0; range < n_ranges; range++) {
-      gint64 start, stop;
-      gst_query_parse_nth_buffering_range (query, range, &start, &stop);
-      start = start * GRAPH_LENGTH / 100;
-      stop = stop * GRAPH_LENGTH / 100;
-      for (i = (gint)start; i < stop; i++)
-        graph [i] = '-';
-    }
-    if (gst_element_query_position (data->pipeline, &format, &position) &&
-        GST_CLOCK_TIME_IS_VALID (position) &&
-        gst_element_query_duration (data->pipeline, &format, &duration) &&
-        GST_CLOCK_TIME_IS_VALID (duration)) {
-      i = (gint)(GRAPH_LENGTH * (double)position / (double)(duration + 1));
-      graph [i] = data->buffering_level < 100 ? 'X' : '>';
-    }
-    g_print ("[%s]", graph);
-    if (data->buffering_level < 100) {
-      g_print (" Buffering: %3d%%", data->buffering_level);
-    } else {
-      g_print ("                ");
-    }
-    g_print ("\r");
-  }
-  
-  return TRUE;
-  
-}
-  
-int main(int argc, char *argv[]) {
-  GstElement *pipeline;
-  GstBus *bus;
-  GstStateChangeReturn ret;
-  GMainLoop *main_loop;
-  CustomData data;
-  guint flags;
-  
-  /* Initialize GStreamer */
-  gst_init (&argc, &argv);
-  
-  /* Initialize our data structure */
-  memset (&data, 0, sizeof (data));
-  data.buffering_level = 100;
-  
-  /* Build the pipeline */
-  pipeline = gst_parse_launch ("playbin uri=http://docs.gstreamer.com/media/sintel_trailer-480p.webm", NULL);
-  bus = gst_element_get_bus (pipeline);
-  
-  /* Set the download flag */
-  g_object_get (pipeline, "flags", &flags, NULL);
-  flags |= GST_PLAY_FLAG_DOWNLOAD;
-  g_object_set (pipeline, "flags", flags, NULL);
-  
-  /* Uncomment this line to limit the amount of downloaded data */
-  /* g_object_set (pipeline, "ring-buffer-max-size", (guint64)4000000, NULL); */
-  
-  /* Start playing */
-  ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
-  if (ret == GST_STATE_CHANGE_FAILURE) {
-    g_printerr ("Unable to set the pipeline to the playing state.\n");
-    gst_object_unref (pipeline);
-    return -1;
-  } else if (ret == GST_STATE_CHANGE_NO_PREROLL) {
-    data.is_live = TRUE;
-  }
-  
-  main_loop = g_main_loop_new (NULL, FALSE);
-  data.loop = main_loop;
-  data.pipeline = pipeline;
-  
-  gst_bus_add_signal_watch (bus);
-  g_signal_connect (bus, "message", G_CALLBACK (cb_message), &data);
-  g_signal_connect (pipeline, "deep-notify::temp-location", G_CALLBACK (got_location), NULL);
-  
-  /* Register a function that GLib will call every second */
-  g_timeout_add_seconds (1, (GSourceFunc)refresh_ui, &data);
-  
-  g_main_loop_run (main_loop);
-  
-  /* Free resources */
-  g_main_loop_unref (main_loop);
-  gst_object_unref (bus);
-  gst_element_set_state (pipeline, GST_STATE_NULL);
-  gst_object_unref (pipeline);
-
-  g_print ("\n");
-  return 0;
-}

attachments/2424848.c

@@ -1,152 +0,0 @@
-#include <gst/gst.h>
-#include <string.h>
-  
-#define CHUNK_SIZE 1024   /* Amount of bytes we are sending in each buffer */
-#define SAMPLE_RATE 44100 /* Samples per second we are sending */
-#define AUDIO_CAPS "audio/x-raw-int,channels=1,rate=%d,signed=(boolean)true,width=16,depth=16,endianness=BYTE_ORDER"
-  
-/* Structure to contain all our information, so we can pass it to callbacks */
-typedef struct _CustomData {
-  GstElement *pipeline;
-  GstElement *app_source;
-  
-  guint64 num_samples;   /* Number of samples generated so far (for timestamp generation) */
-  gfloat a, b, c, d;     /* For waveform generation */
-  
-  guint sourceid;        /* To control the GSource */
-  
-  GMainLoop *main_loop;  /* GLib's Main Loop */
-} CustomData;
-  
-/* This method is called by the idle GSource in the mainloop, to feed CHUNK_SIZE bytes into appsrc.
- * The ide handler is added to the mainloop when appsrc requests us to start sending data (need-data signal)
- * and is removed when appsrc has enough data (enough-data signal).
- */
-static gboolean push_data (CustomData *data) {
-  GstBuffer *buffer;
-  GstFlowReturn ret;
-  int i;
-  gint16 *raw;
-  gint num_samples = CHUNK_SIZE / 2; /* Because each sample is 16 bits */
-  gfloat freq;
-  
-  /* Create a new empty buffer */
-  buffer = gst_buffer_new_and_alloc (CHUNK_SIZE);
-  
-  /* Set its timestamp and duration */
-  GST_BUFFER_TIMESTAMP (buffer) = gst_util_uint64_scale (data->num_samples, GST_SECOND, SAMPLE_RATE);
-  GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale (CHUNK_SIZE, GST_SECOND, SAMPLE_RATE);
-  
-  /* Generate some psychodelic waveforms */
-  raw = (gint16 *)GST_BUFFER_DATA (buffer);
-  data->c += data->d;
-  data->d -= data->c / 1000;
-  freq = 1100 + 1000 * data->d;
-  for (i = 0; i < num_samples; i++) {
-    data->a += data->b;
-    data->b -= data->a / freq;
-    raw[i] = (gint16)(500 * data->a);
-  }
-  data->num_samples += num_samples;
-  
-  /* Push the buffer into the appsrc */
-  g_signal_emit_by_name (data->app_source, "push-buffer", buffer, &ret);
-  
-  /* Free the buffer now that we are done with it */
-  gst_buffer_unref (buffer);
-  
-  if (ret != GST_FLOW_OK) {
-    /* We got some error, stop sending data */
-    return FALSE;
-  }
-  
-  return TRUE;
-}
-  
-/* This signal callback triggers when appsrc needs data. Here, we add an idle handler
- * to the mainloop to start pushing data into the appsrc */
-static void start_feed (GstElement *source, guint size, CustomData *data) {
-  if (data->sourceid == 0) {
-    g_print ("Start feeding\n");
-    data->sourceid = g_idle_add ((GSourceFunc) push_data, data);
-  }
-}
-  
-/* This callback triggers when appsrc has enough data and we can stop sending.
- * We remove the idle handler from the mainloop */
-static void stop_feed (GstElement *source, CustomData *data) {
-  if (data->sourceid != 0) {
-    g_print ("Stop feeding\n");
-    g_source_remove (data->sourceid);
-    data->sourceid = 0;
-  }
-}
-  
-/* This function is called when an error message is posted on the bus */
-static void error_cb (GstBus *bus, GstMessage *msg, CustomData *data) {
-  GError *err;
-  gchar *debug_info;
-  
-  /* Print error details on the screen */
-  gst_message_parse_error (msg, &err, &debug_info);
-  g_printerr ("Error received from element %s: %s\n", GST_OBJECT_NAME (msg->src), err->message);
-  g_printerr ("Debugging information: %s\n", debug_info ? debug_info : "none");
-  g_clear_error (&err);
-  g_free (debug_info);
-  
-  g_main_loop_quit (data->main_loop);
-}
-  
-/* This function is called when playbin has created the appsrc element, so we have
- * a chance to configure it. */
-static void source_setup (GstElement *pipeline, GstElement *source, CustomData *data) {
-  gchar *audio_caps_text;
-  GstCaps *audio_caps;
-  
-  g_print ("Source has been created. Configuring.\n");
-  data->app_source = source;
-  
-  /* Configure appsrc */
-  audio_caps_text = g_strdup_printf (AUDIO_CAPS, SAMPLE_RATE);
-  audio_caps = gst_caps_from_string (audio_caps_text);
-  g_object_set (source, "caps", audio_caps, NULL);
-  g_signal_connect (source, "need-data", G_CALLBACK (start_feed), data);
-  g_signal_connect (source, "enough-data", G_CALLBACK (stop_feed), data);
-  gst_caps_unref (audio_caps);
-  g_free (audio_caps_text);
-}
-  
-int main(int argc, char *argv[]) {
-  CustomData data;
-  GstBus *bus;
-  
-  /* Initialize cumstom data structure */
-  memset (&data, 0, sizeof (data));
-  data.b = 1; /* For waveform generation */
-  data.d = 1;
-  
-  /* Initialize GStreamer */
-  gst_init (&argc, &argv);
-  
-  /* Create the playbin element */
-  data.pipeline = gst_parse_launch ("playbin uri=appsrc://", NULL);
-  g_signal_connect (data.pipeline, "source-setup", G_CALLBACK (source_setup), &data);
-  
-  /* Instruct the bus to emit signals for each received message, and connect to the interesting signals */
-  bus = gst_element_get_bus (data.pipeline);
-  gst_bus_add_signal_watch (bus);
-  g_signal_connect (G_OBJECT (bus), "message::error", (GCallback)error_cb, &data);
-  gst_object_unref (bus);
-  
-  /* Start playing the pipeline */
-  gst_element_set_state (data.pipeline, GST_STATE_PLAYING);
-  
-  /* Create a GLib Main Loop and set it to run */
-  data.main_loop = g_main_loop_new (NULL, FALSE);
-  g_main_loop_run (data.main_loop);
-  
-  /* Free resources */
-  gst_element_set_state (data.pipeline, GST_STATE_NULL);
-  gst_object_unref (data.pipeline);
-  return 0;
-}

attachments/2424850.c

@@ -1,152 +0,0 @@
-#include <gst/gst.h>
-#include <string.h>
-  
-#define CHUNK_SIZE 1024   /* Amount of bytes we are sending in each buffer */
-#define SAMPLE_RATE 44100 /* Samples per second we are sending */
-#define AUDIO_CAPS "audio/x-raw-int,channels=1,rate=%d,signed=(boolean)true,width=16,depth=16,endianness=BYTE_ORDER"
-  
-/* Structure to contain all our information, so we can pass it to callbacks */
-typedef struct _CustomData {
-  GstElement *pipeline;
-  GstElement *app_source;
-  
-  guint64 num_samples;   /* Number of samples generated so far (for timestamp generation) */
-  gfloat a, b, c, d;     /* For waveform generation */
-  
-  guint sourceid;        /* To control the GSource */
-  
-  GMainLoop *main_loop;  /* GLib's Main Loop */
-} CustomData;
-  
-/* This method is called by the idle GSource in the mainloop, to feed CHUNK_SIZE bytes into appsrc.
- * The ide handler is added to the mainloop when appsrc requests us to start sending data (need-data signal)
- * and is removed when appsrc has enough data (enough-data signal).
- */
-static gboolean push_data (CustomData *data) {
-  GstBuffer *buffer;
-  GstFlowReturn ret;
-  int i;
-  gint16 *raw;
-  gint num_samples = CHUNK_SIZE / 2; /* Because each sample is 16 bits */
-  gfloat freq;
-  
-  /* Create a new empty buffer */
-  buffer = gst_buffer_new_and_alloc (CHUNK_SIZE);
-  
-  /* Set its timestamp and duration */
-  GST_BUFFER_TIMESTAMP (buffer) = gst_util_uint64_scale (data->num_samples, GST_SECOND, SAMPLE_RATE);
-  GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale (CHUNK_SIZE, GST_SECOND, SAMPLE_RATE);
-  
-  /* Generate some psychodelic waveforms */
-  raw = (gint16 *)GST_BUFFER_DATA (buffer);
-  data->c += data->d;
-  data->d -= data->c / 1000;
-  freq = 1100 + 1000 * data->d;
-  for (i = 0; i < num_samples; i++) {
-    data->a += data->b;
-    data->b -= data->a / freq;
-    raw[i] = (gint16)(500 * data->a);
-  }
-  data->num_samples += num_samples;
-  
-  /* Push the buffer into the appsrc */
-  g_signal_emit_by_name (data->app_source, "push-buffer", buffer, &ret);
-  
-  /* Free the buffer now that we are done with it */
-  gst_buffer_unref (buffer);
-  
-  if (ret != GST_FLOW_OK) {
-    /* We got some error, stop sending data */
-    return FALSE;
-  }
-  
-  return TRUE;
-}
-  
-/* This signal callback triggers when appsrc needs data. Here, we add an idle handler
- * to the mainloop to start pushing data into the appsrc */
-static void start_feed (GstElement *source, guint size, CustomData *data) {
-  if (data->sourceid == 0) {
-    g_print ("Start feeding\n");
-    data->sourceid = g_idle_add ((GSourceFunc) push_data, data);
-  }
-}
-  
-/* This callback triggers when appsrc has enough data and we can stop sending.
- * We remove the idle handler from the mainloop */
-static void stop_feed (GstElement *source, CustomData *data) {
-  if (data->sourceid != 0) {
-    g_print ("Stop feeding\n");
-    g_source_remove (data->sourceid);
-    data->sourceid = 0;
-  }
-}
-  
-/* This function is called when an error message is posted on the bus */
-static void error_cb (GstBus *bus, GstMessage *msg, CustomData *data) {
-  GError *err;
-  gchar *debug_info;
-  
-  /* Print error details on the screen */
-  gst_message_parse_error (msg, &err, &debug_info);
-  g_printerr ("Error received from element %s: %s\n", GST_OBJECT_NAME (msg->src), err->message);
-  g_printerr ("Debugging information: %s\n", debug_info ? debug_info : "none");
-  g_clear_error (&err);
-  g_free (debug_info);
-  
-  g_main_loop_quit (data->main_loop);
-}
-  
-/* This function is called when playbin has created the appsrc element, so we have
- * a chance to configure it. */
-static void source_setup (GstElement *pipeline, GstElement *source, CustomData *data) {
-  gchar *audio_caps_text;
-  GstCaps *audio_caps;
-  
-  g_print ("Source has been created. Configuring.\n");
-  data->app_source = source;
-  
-  /* Configure appsrc */
-  audio_caps_text = g_strdup_printf (AUDIO_CAPS, SAMPLE_RATE);
-  audio_caps = gst_caps_from_string (audio_caps_text);
-  g_object_set (source, "caps", audio_caps, NULL);
-  g_signal_connect (source, "need-data", G_CALLBACK (start_feed), data);
-  g_signal_connect (source, "enough-data", G_CALLBACK (stop_feed), data);
-  gst_caps_unref (audio_caps);
-  g_free (audio_caps_text);
-}
-  
-int main(int argc, char *argv[]) {
-  CustomData data;
-  GstBus *bus;
-  
-  /* Initialize cumstom data structure */
-  memset (&data, 0, sizeof (data));
-  data.b = 1; /* For waveform generation */
-  data.d = 1;
-  
-  /* Initialize GStreamer */
-  gst_init (&argc, &argv);
-  
-  /* Create the playbin element */
-  data.pipeline = gst_parse_launch ("playbin uri=appsrc://", NULL);
-  g_signal_connect (data.pipeline, "source-setup", G_CALLBACK (source_setup), &data);
-  
-  /* Instruct the bus to emit signals for each received message, and connect to the interesting signals */
-  bus = gst_element_get_bus (data.pipeline);
-  gst_bus_add_signal_watch (bus);
-  g_signal_connect (G_OBJECT (bus), "message::error", (GCallback)error_cb, &data);
-  gst_object_unref (bus);
-  
-  /* Start playing the pipeline */
-  gst_element_set_state (data.pipeline, GST_STATE_PLAYING);
-  
-  /* Create a GLib Main Loop and set it to run */
-  data.main_loop = g_main_loop_new (NULL, FALSE);
-  g_main_loop_run (data.main_loop);
-  
-  /* Free resources */
-  gst_element_set_state (data.pipeline, GST_STATE_NULL);
-  gst_object_unref (data.pipeline);
-  return 0;
-}

attachments/2424874.c

@@ -1,145 +0,0 @@
-#include <string.h>
-#include <gst/gst.h>
-#include <gst/interfaces/colorbalance.h>
-  
-typedef struct _CustomData {
-  GstElement *pipeline;
-  GMainLoop *loop;
-} CustomData;
-  
-/* Process a color balance command */
-static void update_color_channel (const gchar *channel_name, gboolean increase, GstColorBalance *cb) {
-  gdouble step;
-  gint value;
-  GstColorBalanceChannel *channel = NULL;
-  const GList *channels, *l;
-  
-  /* Retrieve the list of channels and locate the requested one */
-  channels = gst_color_balance_list_channels (cb);
-  for (l = channels; l != NULL; l = l->next) {
-    GstColorBalanceChannel *tmp = (GstColorBalanceChannel *)l->data;
-    
-    if (g_strrstr (tmp->label, channel_name)) {
-      channel = tmp;
-      break;
-    }
-  }
-  if (!channel)
-    return;
-  
-  /* Change the channel's value */
-  step = 0.1 * (channel->max_value - channel->min_value);
-  value = gst_color_balance_get_value (cb, channel);
-  if (increase) {
-    value = (gint)(value + step);
-    if (value > channel->max_value)
-      value = channel->max_value;
-  } else {
-    value = (gint)(value - step);
-    if (value < channel->min_value)
-      value = channel->min_value;
-  }
-  gst_color_balance_set_value (cb, channel, value);
-}
-  
-/* Output the current values of all Color Balance channels */
-static void print_current_values (GstElement *pipeline) {
-  const GList *channels, *l;
-  
-  /* Output Color Balance values */
-  channels = gst_color_balance_list_channels (GST_COLOR_BALANCE (pipeline));
-  for (l = channels; l != NULL; l = l->next) {
-    GstColorBalanceChannel *channel = (GstColorBalanceChannel *)l->data;
-    gint value = gst_color_balance_get_value (GST_COLOR_BALANCE (pipeline), channel);
-    g_print ("%s: %3d%% ", channel->label,
-        100 * (value - channel->min_value) / (channel->max_value - channel->min_value));
-  }
-  g_print ("\n");
-}
-  
-/* Process keyboard input */
-static gboolean handle_keyboard (GIOChannel *source, GIOCondition cond, CustomData *data) {
-  gchar *str = NULL;
-  
-  if (g_io_channel_read_line (source, &str, NULL, NULL, NULL) != G_IO_STATUS_NORMAL) {
-    return TRUE;
-  }
-  
-  switch (g_ascii_tolower (str[0])) {
-  case 'c':
-    update_color_channel ("CONTRAST", g_ascii_isupper (str[0]), GST_COLOR_BALANCE (data->pipeline));
-    break;
-  case 'b':
-    update_color_channel ("BRIGHTNESS", g_ascii_isupper (str[0]), GST_COLOR_BALANCE (data->pipeline));
-    break;
-  case 'h':
-    update_color_channel ("HUE", g_ascii_isupper (str[0]), GST_COLOR_BALANCE (data->pipeline));
-    break;
-  case 's':
-    update_color_channel ("SATURATION", g_ascii_isupper (str[0]), GST_COLOR_BALANCE (data->pipeline));
-    break;
-  case 'q':
-    g_main_loop_quit (data->loop);
-    break;
-  default:
-    break;
-  }
-  
-  g_free (str);
-  
-  print_current_values (data->pipeline);
-  
-  return TRUE;
-}
-  
-int main(int argc, char *argv[]) {
-  CustomData data;
-  GstStateChangeReturn ret;
-  GIOChannel *io_stdin;
-   
-  /* Initialize GStreamer */
-  gst_init (&argc, &argv);
-  
-  /* Initialize our data structure */
-  memset (&data, 0, sizeof (data));
-  
-  /* Print usage map */
-  g_print (
-    "USAGE: Choose one of the following options, then press enter:\n"
-    " 'C' to increase contrast, 'c' to decrease contrast\n"
-    " 'B' to increase brightness, 'b' to decrease brightness\n"
-    " 'H' to increase hue, 'h' to decrease hue\n"
-    " 'S' to increase saturation, 's' to decrease saturation\n"
-    " 'Q' to quit\n");
-  
-  /* Build the pipeline */
-  data.pipeline = gst_parse_launch ("playbin uri=http://docs.gstreamer.com/media/sintel_trailer-480p.webm", NULL);
-  
-  /* Add a keyboard watch so we get notified of keystrokes */
-#ifdef _WIN32
-  io_stdin = g_io_channel_win32_new_fd (fileno (stdin));
-#else
-  io_stdin = g_io_channel_unix_new (fileno (stdin));
-#endif
-  g_io_add_watch (io_stdin, G_IO_IN, (GIOFunc)handle_keyboard, &data);
-  
-  /* Start playing */
-  ret = gst_element_set_state (data.pipeline, GST_STATE_PLAYING);
-  if (ret == GST_STATE_CHANGE_FAILURE) {
-    g_printerr ("Unable to set the pipeline to the playing state.\n");
-    gst_object_unref (data.pipeline);
-    return -1;
-  }
-  print_current_values (data.pipeline);
-   
-  /* Create a GLib Main Loop and set it to run */
-  data.loop = g_main_loop_new (NULL, FALSE);
-  g_main_loop_run (data.loop);
-  
-  /* Free resources */
-  g_main_loop_unref (data.loop);
-  g_io_channel_unref (io_stdin);
-  gst_element_set_state (data.pipeline, GST_STATE_NULL);
-  gst_object_unref (data.pipeline);
-  return 0;
-}

attachments/2424879.c

@@ -1,89 +0,0 @@
-#include <gst/gst.h>
-  
-/* playbin flags */
-typedef enum {
-  GST_PLAY_FLAG_VIS           = (1 << 3) /* Enable rendering of visualizations when there is no video stream. */
-} GstPlayFlags;
-  
-/* Return TRUE if this is a Visualization element */
-static gboolean filter_vis_features (GstPluginFeature *feature, gpointer data) {
-  GstElementFactory *factory;
-  
-  if (!GST_IS_ELEMENT_FACTORY (feature))
-    return FALSE;
-  factory = GST_ELEMENT_FACTORY (feature);
-  if (!g_strrstr (gst_element_factory_get_klass (factory), "Visualization"))
-    return FALSE;
-  
-  return TRUE;
-}
-  
-int main(int argc, char *argv[]) {
-  GstElement *pipeline, *vis_plugin;
-  GstBus *bus;
-  GstMessage *msg;
-  GList *list, *walk;
-  GstElementFactory *selected_factory = NULL;
-  guint flags;
-  
-  /* Initialize GStreamer */
-  gst_init (&argc, &argv);
-  
-  /* Get a list of all visualization plugins */
-  list = gst_registry_feature_filter (gst_registry_get_default (), filter_vis_features, FALSE, NULL);
-  
-  /* Print their names */
-  g_print("Available visualization plugins:\n");
-  for (walk = list; walk != NULL; walk = g_list_next (walk)) {
-    const gchar *name;
-    GstElementFactory *factory;
-    
-    factory = GST_ELEMENT_FACTORY (walk->data);
-    name = gst_element_factory_get_longname (factory);
-    g_print("  %s\n", name);
-    
-    if (selected_factory == NULL || g_str_has_prefix (name, "GOOM")) {
-      selected_factory = factory;
-    }
-  }
-  
-  /* Don't use the factory if it's still empty */
-  /* e.g. no visualization plugins found */
-  if (!selected_factory) {
-    g_print ("No visualization plugins found!\n");
-    return -1;
-  }
-  
-  /* We have now selected a factory for the visualization element */
-  g_print ("Selected '%s'\n", gst_element_factory_get_longname (selected_factory));
-  vis_plugin = gst_element_factory_create (selected_factory, NULL);
-  if (!vis_plugin)
-    return -1;
-  
-  /* Build the pipeline */
-  pipeline = gst_parse_launch ("playbin uri=http://radio.hbr1.com:19800/ambient.ogg", NULL);
-  
-  /* Set the visualization flag */
-  g_object_get (pipeline, "flags", &flags, NULL);
-  flags |= GST_PLAY_FLAG_VIS;
-  g_object_set (pipeline, "flags", flags, NULL);
-  
-  /* set vis plugin for playbin */
-  g_object_set (pipeline, "vis-plugin", vis_plugin, NULL);
-  
-  /* Start playing */
-  gst_element_set_state (pipeline, GST_STATE_PLAYING);
-  
-  /* Wait until error or EOS */
-  bus = gst_element_get_bus (pipeline);
-  msg = gst_bus_timed_pop_filtered (bus, GST_CLOCK_TIME_NONE, GST_MESSAGE_ERROR | GST_MESSAGE_EOS);
-  
-  /* Free resources */
-  if (msg != NULL)
-    gst_message_unref (msg);
-  gst_plugin_feature_list_free (list);
-  gst_object_unref (bus);
-  gst_element_set_state (pipeline, GST_STATE_NULL);
-  gst_object_unref (pipeline);
-  return 0;
-}

attachments/2424881.c

@@ -1,55 +0,0 @@
-#include <gst/gst.h>
-  
-int main(int argc, char *argv[]) {
-  GstElement *pipeline, *bin, *equalizer, *convert, *sink;
-  GstPad *pad, *ghost_pad;
-  GstBus *bus;
-  GstMessage *msg;
-  
-  /* Initialize GStreamer */
-  gst_init (&argc, &argv);
-  
-  /* Build the pipeline */
-  pipeline = gst_parse_launch ("playbin uri=http://docs.gstreamer.com/media/sintel_trailer-480p.webm", NULL);
-  
-  /* Create the elements inside the sink bin */
-  equalizer = gst_element_factory_make ("equalizer-3bands", "equalizer");
-  convert = gst_element_factory_make ("audioconvert", "convert");
-  sink = gst_element_factory_make ("autoaudiosink", "audio_sink");
-  if (!equalizer || !convert || !sink) {
-    g_printerr ("Not all elements could be created.\n");
-    return -1;
-  }
-  
-  /* Create the sink bin, add the elements and link them */
-  bin = gst_bin_new ("audio_sink_bin");
-  gst_bin_add_many (GST_BIN (bin), equalizer, convert, sink, NULL);
-  gst_element_link_many (equalizer, convert, sink, NULL);
-  pad = gst_element_get_static_pad (equalizer, "sink");
-  ghost_pad = gst_ghost_pad_new ("sink", pad);
-  gst_pad_set_active (ghost_pad, TRUE);
-  gst_element_add_pad (bin, ghost_pad);
-  gst_object_unref (pad);
-  
-  /* Configure the equalizer */
-  g_object_set (G_OBJECT (equalizer), "band1", (gdouble)-24.0, NULL);
-  g_object_set (G_OBJECT (equalizer), "band2", (gdouble)-24.0, NULL);
-  
-  /* Set playbin's audio sink to be our sink bin */
-  g_object_set (GST_OBJECT (pipeline), "audio-sink", bin, NULL);
-  
-  /* Start playing */
-  gst_element_set_state (pipeline, GST_STATE_PLAYING);
-  
-  /* Wait until error or EOS */
-  bus = gst_element_get_bus (pipeline);
-  msg = gst_bus_timed_pop_filtered (bus, GST_CLOCK_TIME_NONE, GST_MESSAGE_ERROR | GST_MESSAGE_EOS);
-  
-  /* Free resources */
-  if (msg != NULL)
-    gst_message_unref (msg);
-  gst_object_unref (bus);
-  gst_element_set_state (pipeline, GST_STATE_NULL);
-  gst_object_unref (pipeline);
-  return 0;
-}

attachments/2424883.c

@@ -1,147 +0,0 @@
-#include <string.h>
-#include <gst/gst.h>
-  
-typedef struct _CustomData {
-  GstElement *pipeline;
-  GstElement *video_sink;
-  GMainLoop *loop;
-  
-  gboolean playing;  /* Playing or Paused */
-  gdouble rate;      /* Current playback rate (can be negative) */
-} CustomData;
-  
-/* Send seek event to change rate */
-static void send_seek_event (CustomData *data) {
-  gint64 position;
-  GstFormat format = GST_FORMAT_TIME;
-  GstEvent *seek_event;
-  
-  /* Obtain the current position, needed for the seek event */
-  if (!gst_element_query_position (data->pipeline, &format, &position)) {
-    g_printerr ("Unable to retrieve current position.\n");
-    return;
-  }
-  
-  /* Create the seek event */
-  if (data->rate > 0) {
-    seek_event = gst_event_new_seek (data->rate, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE,
-        GST_SEEK_TYPE_SET, position, GST_SEEK_TYPE_NONE, 0);
-  } else {
-    seek_event = gst_event_new_seek (data->rate, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE,
-        GST_SEEK_TYPE_SET, 0, GST_SEEK_TYPE_SET, position);
-  }
-  
-  if (data->video_sink == NULL) {
-    /* If we have not done so, obtain the sink through which we will send the seek events */
-    g_object_get (data->pipeline, "video-sink", &data->video_sink, NULL);
-  }
-  
-  /* Send the event */
-  gst_element_send_event (data->video_sink, seek_event);
-  
-  g_print ("Current rate: %g\n", data->rate);
-}
-  
-/* Process keyboard input */
-static gboolean handle_keyboard (GIOChannel *source, GIOCondition cond, CustomData *data) {
-  gchar *str = NULL;
-  
-  if (g_io_channel_read_line (source, &str, NULL, NULL, NULL) != G_IO_STATUS_NORMAL) {
-    return TRUE;
-  }
-  
-  switch (g_ascii_tolower (str[0])) {
-  case 'p':
-    data->playing = !data->playing;
-    gst_element_set_state (data->pipeline, data->playing ? GST_STATE_PLAYING : GST_STATE_PAUSED);
-    g_print ("Setting state to %s\n", data->playing ? "PLAYING" : "PAUSE");
-    break;
-  case 's':
-    if (g_ascii_isupper (str[0])) {
-      data->rate *= 2.0;
-    } else {
-      data->rate /= 2.0;
-    }
-    send_seek_event (data);
-    break;
-  case 'd':
-    data->rate *= -1.0;
-    send_seek_event (data);
-    break;
-  case 'n':
-    if (data->video_sink == NULL) {
-      /* If we have not done so, obtain the sink through which we will send the step events */
-      g_object_get (data->pipeline, "video-sink", &data->video_sink, NULL);
-    }
-    
-    gst_element_send_event (data->pipeline,
-        gst_event_new_step (GST_FORMAT_BUFFERS, 1, data->rate, TRUE, FALSE));
-    g_print ("Stepping one frame\n");
-    break;
-  case 'q':
-    g_main_loop_quit (data->loop);
-    break;
-  default:
-    break;
-  }
-  
-  g_free (str);
-  
-  return TRUE;
-}
-  
-int main(int argc, char *argv[]) {
-  CustomData data;
-  GstStateChangeReturn ret;
-  GIOChannel *io_stdin;
-  
-  /* Initialize GStreamer */
-  gst_init (&argc, &argv);
-  
-  /* Initialize our data structure */
-  memset (&data, 0, sizeof (data));
-  
-  /* Print usage map */
-  g_print (
-    "USAGE: Choose one of the following options, then press enter:\n"
-    " 'P' to toggle between PAUSE and PLAY\n"
-    " 'S' to increase playback speed, 's' to decrease playback speed\n"
-    " 'D' to toggle playback direction\n"
-    " 'N' to move to next frame (in the current direction, better in PAUSE)\n"
-    " 'Q' to quit\n");
-  
-  /* Build the pipeline */
-//  data.pipeline = gst_parse_launch ("playbin uri=http://docs.gstreamer.com/media/sintel_trailer-480p.webm", NULL);
-  data.pipeline = gst_parse_launch ("playbin uri=file:///f:/media/sintel/sintel_trailer-480p.webm", NULL);
-  
-  /* Add a keyboard watch so we get notified of keystrokes */
-#ifdef _WIN32
-  io_stdin = g_io_channel_win32_new_fd (fileno (stdin));
-#else
-  io_stdin = g_io_channel_unix_new (fileno (stdin));
-#endif
-  g_io_add_watch (io_stdin, G_IO_IN, (GIOFunc)handle_keyboard, &data);
-  
-  /* Start playing */
-  ret = gst_element_set_state (data.pipeline, GST_STATE_PLAYING);
-  if (ret == GST_STATE_CHANGE_FAILURE) {
-    g_printerr ("Unable to set the pipeline to the playing state.\n");
-    gst_object_unref (data.pipeline);
-    return -1;
-  }
-  data.playing = TRUE;
-  data.rate = 1.0;
-  
-  /* Create a GLib Main Loop and set it to run */
-  data.loop = g_main_loop_new (NULL, FALSE);
-  g_main_loop_run (data.loop);
-  
-  /* Free resources */
-  g_main_loop_unref (data.loop);
-  g_io_channel_unref (io_stdin);
-  gst_element_set_state (data.pipeline, GST_STATE_NULL);
-  if (data.video_sink != NULL)
-    gst_object_unref (data.video_sink);
-  gst_object_unref (data.pipeline);
-  return 0;
-}