gstreamer/tests/examples/nvcodec/nvcodec.c
Seungha Yang 1da6846434 examples: nvcodec: Add example for runtime configuration change with nvcodec
Add new example for testing dynamic change of configuration suce as
resolution and properties.
2019-09-11 23:15:06 +00:00

472 lines
13 KiB
C

/* GStreamer
* Copyright (C) 2019 Seungha Yang <seungha.yang@navercorp.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 "nvcodec.h"
#define DEFAULT_VIDEO_SINK "autovideosink"
static GMainLoop *loop = NULL;
static gint width = 320;
static gint height = 240;
static gint bitrate = 2000;
typedef struct
{
GstElement *pipeline;
GstElement *capsfilter;
GstElement *nvenc;
gulong probe_id;
gint prev_width;
gint prev_height;
} TestCallbackData;
static void
restore_terminal (void)
{
gst_nvcodec_kb_set_key_handler (NULL, NULL);
}
static void
print_keyboard_help (void)
{
static struct
{
const gchar *key_desc;
const gchar *key_help;
} key_controls[] = {
{
"q or ESC", "Quit"}, {
"right arrow", "Increase Width"}, {
"left arrow", "Decrease Width"}, {
"up arrow", "Increase Height"}, {
"down arrow", "Decrease Height"}, {
">", "Increase encoding bitrate by 100 kbit/sec"}, {
"<", "Decrease encoding bitrate by 100 kbit/sec"}, {
"k", "show keyboard shortcuts"}
};
guint i, chars_to_pad, desc_len, max_desc_len = 0;
g_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);
g_print ("\t%s", key_controls[i].key_desc);
g_print ("%-*s: ", chars_to_pad, "");
g_print ("%s\n", key_controls[i].key_help);
}
g_print ("\n");
}
static void
keyboard_cb (const gchar * key_input, gpointer user_data)
{
TestCallbackData *data = (TestCallbackData *) user_data;
gchar key = '\0';
/* only want to switch/case on single char, not first char of string */
if (key_input[0] != '\0' && key_input[1] == '\0')
key = g_ascii_tolower (key_input[0]);
switch (key) {
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 27: /* ESC */
if (key_input[1] == '\0') {
gst_element_send_event (data->pipeline, gst_event_new_eos ());
g_main_loop_quit (loop);
}
break;
case '>':
bitrate += 100;
bitrate = MIN (bitrate, 2048000);
g_print ("Increase encoding bitrate to %d\n", bitrate);
g_object_set (G_OBJECT (data->nvenc), "bitrate", bitrate, NULL);
break;
case '<':
bitrate -= 100;
bitrate = MAX (bitrate, 100);
g_print ("Decrease encoding bitrate to %d\n", bitrate);
g_object_set (G_OBJECT (data->nvenc), "bitrate", bitrate, NULL);
break;
default:{
if (strcmp (key_input, GST_NVCODEC_KB_ARROW_RIGHT) == 0) {
g_print ("Increase width to %d\n", ++width);
} else if (strcmp (key_input, GST_NVCODEC_KB_ARROW_LEFT) == 0) {
g_print ("Decrease width to %d\n", --width);
} else if (strcmp (key_input, GST_NVCODEC_KB_ARROW_UP) == 0) {
g_print ("Increase height to %d\n", ++height);
} else if (strcmp (key_input, GST_NVCODEC_KB_ARROW_DOWN) == 0) {
g_print ("Decrease height to %d\n", --height);
}
break;
}
}
}
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 ("nvcodec.", 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, "nvcodec.error");
gst_message_parse_error (msg, &err, &dbg);
g_printerr ("ERROR %s \n", err->message);
if (dbg != NULL)
g_printerr ("ERROR debug information: %s\n", dbg);
g_clear_error (&err);
g_free (dbg);
g_main_loop_quit (loop);
break;
}
case GST_MESSAGE_ELEMENT:
{
GstNavigationMessageType mtype = gst_navigation_message_get_type (msg);
if (mtype == GST_NAVIGATION_MESSAGE_EVENT) {
GstEvent *ev = NULL;
if (gst_navigation_message_parse_event (msg, &ev)) {
GstNavigationEventType e_type = gst_navigation_event_get_type (ev);
if (e_type == GST_NAVIGATION_EVENT_KEY_PRESS) {
const gchar *key;
if (gst_navigation_event_parse_key_event (ev, &key)) {
GST_INFO ("Key press: %s", key);
if (strcmp (key, "Left") == 0)
key = GST_NVCODEC_KB_ARROW_LEFT;
else if (strcmp (key, "Right") == 0)
key = GST_NVCODEC_KB_ARROW_RIGHT;
else if (strcmp (key, "Up") == 0)
key = GST_NVCODEC_KB_ARROW_UP;
else if (strcmp (key, "Down") == 0)
key = GST_NVCODEC_KB_ARROW_DOWN;
else if (strlen (key) > 1)
break;
keyboard_cb (key, user_data);
}
}
}
if (ev)
gst_event_unref (ev);
}
break;
}
default:
break;
}
return TRUE;
}
static gboolean
check_nvcodec_available (void)
{
gboolean ret = TRUE;
GstElement *elem;
elem = gst_element_factory_make ("nvh264enc", NULL);
if (!elem) {
GST_WARNING ("nvh264enc is not available, possibly driver load failure");
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);
if (ret) {
elem = gst_element_factory_make ("nvh264dec", NULL);
if (!elem) {
GST_WARNING ("nvh264dec is not available, possibly driver load failure");
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;
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;
}
}
}
}
return ret;
}
gint
main (gint argc, gchar ** argv)
{
GstElement *pipeline, *src, *convert, *capsfilter, *queue, *sink, *parse;
GstElement *enc, *dec;
GstStateChangeReturn sret;
GError *error = NULL;
gboolean use_gl = FALSE;
gint exitcode = 1;
GOptionContext *option_ctx;
GstCaps *caps;
TestCallbackData data = { 0, };
GstPad *pad;
GOptionEntry options[] = {
{"use-gl", 0, 0, G_OPTION_ARG_NONE, &use_gl,
"Use OpenGL memory as input to the nvenc", NULL}
,
{NULL}
};
option_ctx = g_option_context_new ("nvcodec 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)) {
g_printerr ("option parsing failed: %s\n", error->message);
g_clear_error (&error);
exit (1);
}
g_option_context_free (option_ctx);
gst_init (NULL, NULL);
if (!check_nvcodec_available ()) {
g_printerr ("Cannot load nvcodec plugin");
exit (1);
}
/* prepare the pipeline */
loop = g_main_loop_new (NULL, FALSE);
pipeline = gst_pipeline_new ("nvcodec-example");
if (use_gl)
src = gst_element_factory_make ("gltestsrc", NULL);
else
src = gst_element_factory_make ("videotestsrc", NULL);
if (!src) {
g_printerr ("%s element is not available\n",
use_gl ? "gltestsrc" : "videotestsrc");
goto terminate;
}
gst_bin_add (GST_BIN (pipeline), src);
if (use_gl)
convert = gst_element_factory_make ("glcolorconvert", NULL);
else
convert = gst_element_factory_make ("videoconvert", NULL);
if (!convert) {
g_printerr ("%s element is not available\n",
use_gl ? "glcolorconvert" : "videoconvert");
goto terminate;
}
gst_bin_add (GST_BIN (pipeline), convert);
if (use_gl) {
sink = gst_element_factory_make ("glimagesink", NULL);
} else {
sink = gst_element_factory_make (DEFAULT_VIDEO_SINK, NULL);
}
if (!sink) {
g_printerr ("%s element is not available\n",
use_gl ? "glimagesink" : DEFAULT_VIDEO_SINK);
goto terminate;
}
gst_bin_add (GST_BIN (pipeline), sink);
capsfilter = gst_element_factory_make ("capsfilter", NULL);
queue = gst_element_factory_make ("queue", NULL);
enc = gst_element_factory_make ("nvh264enc", NULL);
parse = gst_element_factory_make ("h264parse", NULL);
/* vbr with target bitrate */
g_object_set (G_OBJECT (enc), "rc-mode", 4, "bitrate", bitrate, NULL);
dec = gst_element_factory_make ("nvh264dec", NULL);
gst_bin_add_many (GST_BIN (pipeline), capsfilter, queue, enc, parse, dec,
NULL);
if (!use_gl) {
GstElement *sink_convert = gst_element_factory_make ("videoconvert", NULL);
gst_bin_add (GST_BIN (pipeline), sink_convert);
gst_element_link_many (src,
convert, capsfilter, enc, parse, dec, queue, sink_convert, sink, NULL);
} else {
gst_element_link_many (src,
convert, capsfilter, enc, parse, dec, queue, sink, NULL);
}
caps = gst_caps_from_string ("video/x-raw,format=NV12");
if (use_gl) {
gst_caps_set_features_simple (caps,
gst_caps_features_from_string ("memory:GLMemory"));
}
g_object_set (G_OBJECT (capsfilter), "caps", caps, NULL);
gst_caps_unref (caps);
data.pipeline = pipeline;
data.capsfilter = capsfilter;
data.nvenc = enc;
pad = gst_element_get_static_pad (convert, "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);
if (gst_nvcodec_kb_set_key_handler (keyboard_cb, &data)) {
g_print ("Press 'k' to see a list of keyboard shortcuts.\n");
atexit (restore_terminal);
}
/* run the pipeline */
sret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
if (sret == GST_STATE_CHANGE_FAILURE) {
g_printerr ("Pipeline doesn't want to playing\n");
} else {
g_main_loop_run (loop);
}
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_bus_remove_watch (GST_ELEMENT_BUS (pipeline));
exitcode = 0;
terminate:
gst_object_unref (pipeline);
g_main_loop_unref (loop);
return exitcode;
}