gstreamer/subprojects/gst-plugins-bad/tests/examples/mediafoundation/mfvideoenc-dynamic-reconfigure.c

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/* GStreamer
* Copyright (C) 2022 Seungha Yang <seungha@centricular.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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include <stdlib.h>
#include "../key-handler.h"
static GMainLoop *loop = NULL;
static gint width = 640;
static gint height = 480;
static guint bitrate = 1000;
G_LOCK_DEFINE_STATIC (input_lock);
typedef struct
{
GstElement *pipeline;
GstElement *capsfilter;
GstElement *encoder;
gulong probe_id;
gint prev_width;
gint prev_height;
} TestCallbackData;
static void
print_keyboard_help (void)
{
/* *INDENT-OFF* */
static struct
{
const gchar *key_desc;
const gchar *key_help;
} key_controls[] = {
{
"q", "Quit"}, {
"right arrow", "Increase Width"}, {
"left arrow", "Decrease Width"}, {
"up arrow", "Increase Height"}, {
"down arrow", "Decrease Height"}, {
">", "Increase bitrate by 100 kbit/sec"}, {
"<", "Decrease bitrate by 100 kbit/sec"}, {
"k", "show keyboard shortcuts"}
};
/* *INDENT-ON* */
guint i, chars_to_pad, desc_len, max_desc_len = 0;
gst_print ("\n\n%s\n\n", "Keyboard controls:");
for (i = 0; i < G_N_ELEMENTS (key_controls); ++i) {
desc_len = g_utf8_strlen (key_controls[i].key_desc, -1);
max_desc_len = MAX (max_desc_len, desc_len);
}
++max_desc_len;
for (i = 0; i < G_N_ELEMENTS (key_controls); ++i) {
chars_to_pad = max_desc_len - g_utf8_strlen (key_controls[i].key_desc, -1);
gst_print ("\t%s", key_controls[i].key_desc);
gst_print ("%-*s: ", chars_to_pad, "");
gst_print ("%s\n", key_controls[i].key_help);
}
gst_print ("\n");
}
static void
keyboard_cb (gchar input, gboolean is_ascii, gpointer user_data)
{
TestCallbackData *data = (TestCallbackData *) user_data;
G_LOCK (input_lock);
if (!is_ascii) {
switch (input) {
case KB_ARROW_UP:
height += 2;
gst_print ("Increase height to %d\n", height);
break;
case KB_ARROW_DOWN:
height -= 2;
height = MAX (height, 16);
gst_print ("Decrease height to %d\n", height);
break;
case KB_ARROW_LEFT:
width -= 2;
width = MAX (width, 16);
gst_print ("Decrease width to %d\n", width);
break;
case KB_ARROW_RIGHT:
width += 2;
gst_print ("Increase width to %d\n", width);
break;
default:
break;
}
} else {
switch (input) {
case 'k':
case 'K':
print_keyboard_help ();
break;
case 'q':
case 'Q':
gst_element_send_event (data->pipeline, gst_event_new_eos ());
g_main_loop_quit (loop);
break;
case '>':
bitrate += 100;
bitrate = MIN (bitrate, 2048000);
gst_print ("Increase bitrate to %d\n", bitrate);
g_object_set (data->encoder, "bitrate", bitrate, NULL);
break;
case '<':
bitrate -= 100;
bitrate = MAX (bitrate, 100);
gst_print ("Decrease bitrate to %d\n", bitrate);
g_object_set (data->encoder, "bitrate", bitrate, NULL);
break;
default:
break;
}
}
G_UNLOCK (input_lock);
}
static gboolean
bus_msg (GstBus * bus, GstMessage * msg, gpointer user_data)
{
TestCallbackData *data = (TestCallbackData *) user_data;
GstElement *pipeline = data->pipeline;
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_STATE_CHANGED:
if (GST_MESSAGE_SRC (msg) == GST_OBJECT_CAST (pipeline)) {
gchar *state_transition_name;
GstState old, new, pending;
gst_message_parse_state_changed (msg, &old, &new, &pending);
state_transition_name = g_strdup_printf ("%s_%s",
gst_element_state_get_name (old), gst_element_state_get_name (new));
/* dump graph for (some) pipeline state changes */
{
gchar *dump_name = g_strconcat ("mfvideoenc.", state_transition_name,
NULL);
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
GST_DEBUG_GRAPH_SHOW_ALL, dump_name);
g_free (dump_name);
}
g_free (state_transition_name);
}
break;
case GST_MESSAGE_ERROR:{
GError *err;
gchar *dbg;
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
GST_DEBUG_GRAPH_SHOW_ALL, "mfvideoenc.error");
gst_message_parse_error (msg, &err, &dbg);
gst_printerr ("ERROR %s \n", err->message);
if (dbg != NULL)
gst_printerr ("ERROR debug information: %s\n", dbg);
g_clear_error (&err);
g_free (dbg);
g_main_loop_quit (loop);
break;
}
default:
break;
}
return TRUE;
}
static gboolean
check_mfvideoenc_available (const gchar * encoder_name)
{
gboolean ret = TRUE;
GstElement *elem;
elem = gst_element_factory_make (encoder_name, NULL);
if (!elem) {
GST_WARNING ("%s is not available", encoder_name);
return FALSE;
}
/* GST_STATE_READY is meaning that driver could be loaded */
if (gst_element_set_state (elem,
GST_STATE_PAUSED) != GST_STATE_CHANGE_SUCCESS) {
GST_WARNING ("cannot open device");
ret = FALSE;
}
gst_element_set_state (elem, GST_STATE_NULL);
gst_object_unref (elem);
return ret;
}
static GstPadProbeReturn
resolution_change_probe (GstPad * pad, GstPadProbeInfo * info,
gpointer user_data)
{
GstPadProbeReturn ret = GST_PAD_PROBE_OK;
TestCallbackData *data = (TestCallbackData *) user_data;
G_LOCK (input_lock);
if (GST_IS_BUFFER (GST_PAD_PROBE_INFO_DATA (info))) {
GstBuffer *buffer = GST_PAD_PROBE_INFO_BUFFER (info);
GstPad *peer = gst_pad_get_peer (pad);
GstFlowReturn flow_ret = GST_FLOW_OK;
ret = GST_PAD_PROBE_HANDLED;
if (peer) {
flow_ret = gst_pad_chain (peer, buffer);
if (flow_ret != GST_FLOW_OK) {
gst_pad_remove_probe (pad, data->probe_id);
data->probe_id = 0;
} else {
if (data->prev_width != width || data->prev_height != height) {
GstCaps *caps = NULL;
gint next_width, next_height;
next_width = width;
next_height = height;
g_object_get (data->capsfilter, "caps", &caps, NULL);
caps = gst_caps_make_writable (caps);
gst_caps_set_simple (caps,
"width", G_TYPE_INT, next_width, "height", G_TYPE_INT,
next_height, NULL);
g_object_set (data->capsfilter, "caps", caps, NULL);
gst_caps_unref (caps);
data->prev_width = next_width;
data->prev_height = next_height;
}
}
}
}
G_UNLOCK (input_lock);
return ret;
}
gint
main (gint argc, gchar ** argv)
{
GstElement *pipeline;
GstElement *src, *capsfilter, *enc, *enc_queue, *dec, *parser, *queue, *sink;
GstStateChangeReturn sret;
GError *error = NULL;
GOptionContext *option_ctx;
GstCaps *caps;
TestCallbackData data = { 0, };
GstPad *pad;
gchar *encoder_name = NULL;
/* *INDENT-OFF* */
GOptionEntry options[] = {
{"encoder", 0, 0, G_OPTION_ARG_STRING, &encoder_name,
"MediaFoundation encoder element to test, default: mfh264enc"},
{NULL}
};
/* *INDENT-ON* */
#define MAKE_ELEMENT_AND_ADD(elem, name) G_STMT_START { \
GstElement *_elem = gst_element_factory_make (name, NULL); \
if (!_elem) { \
gst_printerrln ("%s is not available", name); \
exit (1); \
} \
gst_println ("Adding element %s", name); \
elem = _elem; \
gst_bin_add (GST_BIN (pipeline), elem); \
} G_STMT_END
option_ctx =
g_option_context_new
("MediaFoundation video encoder dynamic reconfigure example");
g_option_context_add_main_entries (option_ctx, options, NULL);
g_option_context_set_help_enabled (option_ctx, TRUE);
if (!g_option_context_parse (option_ctx, &argc, &argv, &error)) {
gst_printerrln ("option parsing failed: %s\n", error->message);
g_clear_error (&error);
exit (1);
}
g_option_context_free (option_ctx);
gst_init (NULL, NULL);
if (!encoder_name)
encoder_name = g_strdup ("mfh264enc");
if (!check_mfvideoenc_available (encoder_name)) {
gst_printerrln ("Cannot load %s plugin", encoder_name);
exit (1);
}
/* prepare the pipeline */
loop = g_main_loop_new (NULL, FALSE);
pipeline = gst_pipeline_new (NULL);
MAKE_ELEMENT_AND_ADD (src, "videotestsrc");
g_object_set (src, "pattern", 1, NULL);
MAKE_ELEMENT_AND_ADD (capsfilter, "capsfilter");
MAKE_ELEMENT_AND_ADD (enc, encoder_name);
g_object_set (G_OBJECT (enc), "bitrate", bitrate, "gop-size", 30,
"rc-mode", 0, NULL);
MAKE_ELEMENT_AND_ADD (enc_queue, "queue");
if (g_strrstr (encoder_name, "h265")) {
MAKE_ELEMENT_AND_ADD (parser, "h265parse");
MAKE_ELEMENT_AND_ADD (dec, "d3d11h265dec");
} else if (g_strrstr (encoder_name, "vp9")) {
MAKE_ELEMENT_AND_ADD (parser, "vp9parse");
MAKE_ELEMENT_AND_ADD (dec, "d3d11vp9dec");
} else {
MAKE_ELEMENT_AND_ADD (parser, "h264parse");
MAKE_ELEMENT_AND_ADD (dec, "d3d11h264dec");
}
MAKE_ELEMENT_AND_ADD (queue, "queue");
MAKE_ELEMENT_AND_ADD (sink, "d3d11videosink");
if (!gst_element_link_many (src, capsfilter, enc, enc_queue,
parser, dec, queue, sink, NULL)) {
gst_printerrln ("Failed to link element");
exit (1);
}
caps = gst_caps_new_simple ("video/x-raw", "width", G_TYPE_INT,
width, "height", G_TYPE_INT, height, NULL);
g_object_set (capsfilter, "caps", caps, NULL);
gst_caps_unref (caps);
data.pipeline = pipeline;
data.capsfilter = capsfilter;
data.encoder = enc;
pad = gst_element_get_static_pad (capsfilter, "src");
data.probe_id = gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_BUFFER,
(GstPadProbeCallback) resolution_change_probe, &data, NULL);
gst_object_unref (pad);
data.prev_width = width;
data.prev_height = height;
gst_bus_add_watch (GST_ELEMENT_BUS (pipeline), bus_msg, &data);
/* run the pipeline */
sret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
if (sret == GST_STATE_CHANGE_FAILURE) {
gst_printerrln ("Pipeline doesn't want to playing\n");
} else {
set_key_handler ((KeyInputCallback) keyboard_cb, &data);
g_main_loop_run (loop);
unset_key_handler ();
}
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_bus_remove_watch (GST_ELEMENT_BUS (pipeline));
gst_object_unref (pipeline);
g_main_loop_unref (loop);
g_free (encoder_name);
return 0;
}