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livetrax/gtk2_ardour/video_image_frame.cc
Robin Gareus 4050ca5633
Update GPL boilerplate and (C)
Copyright-holder and year information is extracted from git log.

git history begins in 2005. So (C) from 1998..2005 is lost. Also some
(C) assignment of commits where the committer didn't use --author.
2019-08-03 15:53:15 +02:00

296 lines
7.3 KiB
C++

/*
* Copyright (C) 2013-2015 Tim Mayberry <mojofunk@gmail.com>
* Copyright (C) 2013-2018 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2013-2018 Robin Gareus <robin@gareus.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <sigc++/bind.h>
#include "ardour/tempo.h"
#include <gtkmm2ext/utils.h>
#include <pthread.h>
#include "canvas/container.h"
#include "ardour_http.h"
#include "public_editor.h"
#include "utils_videotl.h"
#include "video_image_frame.h"
#include "pbd/i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace VideoUtils;
static void freedata_cb (uint8_t *d, void* /*arg*/) {
/* later this can be used with libharvid
* the buffer/videocacheline instead of freeing it
*/
free (d);
}
VideoImageFrame::VideoImageFrame (PublicEditor& ed, ArdourCanvas::Container& parent, int w, int h, std::string vsurl, std::string vfn)
: editor (ed)
, _parent(&parent)
, clip_width(w)
, clip_height(h)
, video_server_url(vsurl)
, video_filename(vfn)
{
pthread_mutex_init(&request_lock, NULL);
pthread_mutex_init(&queue_lock, NULL);
queued_request=false;
video_frame_number = -1;
rightend = -1;
sample_position = 0;
thread_active=false;
unit_position = editor.sample_to_pixel (sample_position);
image = new ArdourCanvas::Image (_parent, Cairo::FORMAT_ARGB32, clip_width, clip_height);
img = image->get_image();
fill_frame (0, 0, 0);
draw_line();
draw_x();
image->put_image(img);
image->Event.connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_videotl_bar_event), _parent));
}
VideoImageFrame::~VideoImageFrame ()
{
if (thread_active) pthread_join(thread_id_tt, NULL);
delete image;
pthread_mutex_destroy(&request_lock);
pthread_mutex_destroy(&queue_lock);
}
void
VideoImageFrame::set_position (samplepos_t sample)
{
double new_unit_position = editor.sample_to_pixel (sample);
image->move (ArdourCanvas::Duple (new_unit_position - unit_position, 0.0));
sample_position = sample;
unit_position = new_unit_position;
}
void
VideoImageFrame::reposition ()
{
set_position (sample_position);
}
void
VideoImageFrame::exposeimg () {
ImgChanged(); /* EMIT SIGNAL */
}
void
VideoImageFrame::set_videoframe (samplepos_t videoframenumber, int re)
{
if (video_frame_number == videoframenumber && rightend == re) return;
video_frame_number = videoframenumber;
rightend = re;
img = image->get_image();
fill_frame (0, 0, 0);
draw_x();
draw_line();
cut_rightend();
image->put_image(img);
exposeimg();
/* request video-frame from decoder in background thread */
http_get (video_frame_number);
}
void
VideoImageFrame::draw_line ()
{
const int rowstride = img->stride;
const int clip_height = img->height;
uint8_t *pixels, *p;
pixels = img->data;
int y;
for (y = 0;y < clip_height; y++) {
p = pixels + y * rowstride;
p[0] = 255; p[1] = 255; p[2] = 255; p[3] = 255;
}
}
void
VideoImageFrame::fill_frame (const uint8_t r, const uint8_t g, const uint8_t b)
{
const int rowstride = img->stride;
const int clip_height = img->height;
const int clip_width = img->width;
uint8_t *pixels, *p;
pixels = img->data;
int x,y;
for (y = 0; y < clip_height; ++y) {
for (x = 0; x < clip_width; ++x) {
p = pixels + y * rowstride + x * 4;
p[0] = b; p[1] = g; p[2] = r; p[3] = 255;
}
}
}
void
VideoImageFrame::draw_x ()
{
int x,y;
const int rowstride = img->stride;
const int clip_width = img->width;
const int clip_height = img->height;
uint8_t *pixels, *p;
pixels = img->data;
for (x = 0;x < clip_width; x++) {
y = clip_height * x / clip_width;
p = pixels + y * rowstride + x * 4;
p[0] = 192; p[1] = 192; p[2] = 192; p[3] = 255;
p = pixels + y * rowstride + (clip_width-x-1) * 4;
p[0] = 192; p[1] = 192; p[2] = 192; p[3] = 255;
}
}
void
VideoImageFrame::cut_rightend ()
{
if (rightend < 0 ) { return; }
const int rowstride = img->stride;
const int clip_height = img->height;
const int clip_width = img->width;
uint8_t *pixels, *p;
pixels = img->data;
if (rightend > clip_width) { return; }
int x,y;
for (y = 0;y < clip_height; ++y) {
p = pixels + y * rowstride + rightend * 4;
p[0] = 192; p[1] = 192; p[2] = 192; p[3] = 255;
for (x=rightend+1; x < clip_width; ++x) {
p = pixels + y * rowstride + x * 4;
p[0] = 0; p[1] = 0; p[2] = 0; p[3] = 0;
}
}
}
static void *
http_get_thread (void *arg) {
VideoImageFrame *vif = static_cast<VideoImageFrame *>(arg);
char url[2048];
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
snprintf(url, sizeof(url), "%s?frame=%li&w=%d&h=%d&file=%s&format=bgra",
vif->get_video_server_url().c_str(),
(long int) vif->get_req_frame(), vif->get_width(), vif->get_height(),
vif->get_video_filename().c_str()
);
int status = 0;
int timeout = 1000; // * 5ms -> 5sec
char *res = NULL;
do {
res = ArdourCurl::http_get (url, &status, false);
if (status == 503) Glib::usleep(5000); // try-again
} while (status == 503 && --timeout > 0);
if (status != 200 || !res) {
printf("no-video frame: video-server returned http-status: %d\n", status);
}
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
vif->http_download_done(res);
pthread_exit(0);
return 0;
}
void
VideoImageFrame::http_download_done (char *data){
if (queued_request) {
http_get_again(want_video_frame_number);
return;
}
if (!data) {
/* Image request failed (HTTP error or timeout) */
img = image->get_image();
fill_frame (128, 0, 0);
draw_x();
cut_rightend();
draw_line();
cut_rightend();
image->put_image(img);
} else {
img = image->get_image(false);
img->data = (uint8_t*) data;
img->destroy_callback = &freedata_cb;
draw_line();
cut_rightend();
image->put_image(img);
}
exposeimg();
/* don't request frames too quickly, wait after user has zoomed */
Glib::usleep(40000);
if (queued_request) {
http_get_again(want_video_frame_number);
}
pthread_mutex_unlock(&request_lock);
}
void
VideoImageFrame::http_get (samplepos_t fn) {
if (pthread_mutex_trylock(&request_lock)) {
pthread_mutex_lock(&queue_lock);
queued_request=true;
want_video_frame_number=fn;
pthread_mutex_unlock(&queue_lock);
return;
}
if (thread_active) pthread_join(thread_id_tt, NULL);
pthread_mutex_lock(&queue_lock);
queued_request=false;
req_video_frame_number=fn;
pthread_mutex_unlock(&queue_lock);
int rv = pthread_create(&thread_id_tt, NULL, http_get_thread, this);
thread_active=true;
if (rv) {
thread_active=false;
printf("thread creation failed. %i\n",rv);
http_download_done(NULL);
}
}
void
VideoImageFrame::http_get_again(samplepos_t /*fn*/) {
pthread_mutex_lock(&queue_lock);
queued_request=false;
req_video_frame_number=want_video_frame_number;
pthread_mutex_unlock(&queue_lock);
http_get_thread(this);
}