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Diffstat (limited to 'tests/examples/app/appsrc-ra.c')
-rw-r--r-- | tests/examples/app/appsrc-ra.c | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/tests/examples/app/appsrc-ra.c b/tests/examples/app/appsrc-ra.c deleted file mode 100644 index 46b19cae..00000000 --- a/tests/examples/app/appsrc-ra.c +++ /dev/null @@ -1,229 +0,0 @@ -/* GStreamer - * - * appsrc-ra.c: example for using appsrc in random-access mode. - * - * Copyright (C) 2008 Wim Taymans <wim.taymans@gmail.com> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include <gst/gst.h> - -#include <stdio.h> -#include <string.h> -#include <stdlib.h> - -/* FIXME: remove once we depend on GLib >= 2.22 */ -#if !GLIB_CHECK_VERSION (2, 22, 0) -#define g_mapped_file_unref g_mapped_file_free -#endif - -GST_DEBUG_CATEGORY (appsrc_playbin_debug); -#define GST_CAT_DEFAULT appsrc_playbin_debug - -/* - * an example application of using appsrc in random-access mode. When the - * appsrc requests data with the need-data signal, we retrieve a buffer of the - * requested size and push it to appsrc. - * - * This is a good example how one would deal with a local file resource. - * - * Appsrc in random-access mode needs seeking support and we must thus connect - * to the seek signal to perform any seeks when requested. - * - * In random-access mode we must set the size of the source material. - */ -typedef struct _App App; - -struct _App -{ - GstElement *playbin; - GstElement *appsrc; - - GMainLoop *loop; - - GMappedFile *file; - guint8 *data; - gsize length; - guint64 offset; -}; - -App s_app; - -/* This method is called by the need-data signal callback, we feed data into the - * appsrc with the requested size. - */ -static void -feed_data (GstElement * appsrc, guint size, App * app) -{ - GstBuffer *buffer; - GstFlowReturn ret; - - buffer = gst_buffer_new (); - - if (app->offset >= app->length) { - /* we are EOS, send end-of-stream */ - g_signal_emit_by_name (app->appsrc, "end-of-stream", &ret); - return; - } - - /* read the amount of data, we are allowed to return less if we are EOS */ - if (app->offset + size > app->length) - size = app->length - app->offset; - - GST_BUFFER_DATA (buffer) = app->data + app->offset; - GST_BUFFER_SIZE (buffer) = size; - /* we need to set an offset for random access */ - GST_BUFFER_OFFSET (buffer) = app->offset; - GST_BUFFER_OFFSET_END (buffer) = app->offset + size; - - GST_DEBUG ("feed buffer %p, offset %" G_GUINT64_FORMAT "-%u", buffer, - app->offset, size); - g_signal_emit_by_name (app->appsrc, "push-buffer", buffer, &ret); - gst_buffer_unref (buffer); - - app->offset += size; - - return; -} - -/* called when appsrc wants us to return data from a new position with the next - * call to push-buffer. */ -static gboolean -seek_data (GstElement * appsrc, guint64 position, App * app) -{ - GST_DEBUG ("seek to offset %" G_GUINT64_FORMAT, position); - app->offset = position; - - return TRUE; -} - -/* this callback is called when playbin2 has constructed a source object to read - * from. Since we provided the appsrc:// uri to playbin2, this will be the - * appsrc that we must handle. We set up some signals to push data into appsrc - * and one to perform a seek. */ -static void -found_source (GObject * object, GObject * orig, GParamSpec * pspec, App * app) -{ - /* get a handle to the appsrc */ - g_object_get (orig, pspec->name, &app->appsrc, NULL); - - GST_DEBUG ("got appsrc %p", app->appsrc); - - /* we can set the length in appsrc. This allows some elements to estimate the - * total duration of the stream. It's a good idea to set the property when you - * can but it's not required. */ - g_object_set (app->appsrc, "size", (gint64) app->length, NULL); - gst_util_set_object_arg (G_OBJECT (app->appsrc), "stream-type", - "random-access"); - - /* configure the appsrc, we will push a buffer to appsrc when it needs more - * data */ - g_signal_connect (app->appsrc, "need-data", G_CALLBACK (feed_data), app); - g_signal_connect (app->appsrc, "seek-data", G_CALLBACK (seek_data), app); -} - -static gboolean -bus_message (GstBus * bus, GstMessage * message, App * app) -{ - GST_DEBUG ("got message %s", - gst_message_type_get_name (GST_MESSAGE_TYPE (message))); - - switch (GST_MESSAGE_TYPE (message)) { - case GST_MESSAGE_ERROR: - g_error ("received error"); - g_main_loop_quit (app->loop); - break; - case GST_MESSAGE_EOS: - g_main_loop_quit (app->loop); - break; - default: - break; - } - return TRUE; -} - -int -main (int argc, char *argv[]) -{ - App *app = &s_app; - GError *error = NULL; - GstBus *bus; - - gst_init (&argc, &argv); - - GST_DEBUG_CATEGORY_INIT (appsrc_playbin_debug, "appsrc-playbin", 0, - "appsrc playbin example"); - - if (argc < 2) { - g_print ("usage: %s <filename>\n", argv[0]); - return -1; - } - - /* try to open the file as an mmapped file */ - app->file = g_mapped_file_new (argv[1], FALSE, &error); - if (error) { - g_print ("failed to open file: %s\n", error->message); - g_error_free (error); - return -2; - } - /* get some vitals, this will be used to read data from the mmapped file and - * feed it to appsrc. */ - app->length = g_mapped_file_get_length (app->file); - app->data = (guint8 *) g_mapped_file_get_contents (app->file); - app->offset = 0; - - /* create a mainloop to get messages */ - app->loop = g_main_loop_new (NULL, TRUE); - - app->playbin = gst_element_factory_make ("playbin2", NULL); - g_assert (app->playbin); - - bus = gst_pipeline_get_bus (GST_PIPELINE (app->playbin)); - - /* add watch for messages */ - gst_bus_add_watch (bus, (GstBusFunc) bus_message, app); - - /* set to read from appsrc */ - g_object_set (app->playbin, "uri", "appsrc://", NULL); - - /* get notification when the source is created so that we get a handle to it - * and can configure it */ - g_signal_connect (app->playbin, "deep-notify::source", - (GCallback) found_source, app); - - /* go to playing and wait in a mainloop. */ - gst_element_set_state (app->playbin, GST_STATE_PLAYING); - - /* this mainloop is stopped when we receive an error or EOS */ - g_main_loop_run (app->loop); - - GST_DEBUG ("stopping"); - - gst_element_set_state (app->playbin, GST_STATE_NULL); - - /* free the file */ - g_mapped_file_unref (app->file); - - gst_object_unref (bus); - g_main_loop_unref (app->loop); - - return 0; -} |