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videoencoder.cpp
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videoencoder.cpp
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/* Modified by Stephan Kulow <[email protected]> 2014 to take the PNGs
from stdin and use opencv directly */
/* Modified by Stephan Kulow <[email protected]> 2016 to take the PNGs
from external file and back */
/* Modified by by the openQA team to take PPM images instead of PNGs
and to produce PNG images needed by the live log */
// This file is taken from the Theora project. Original licensing:
/********************************************************************
* *
* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009,2009 *
* by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
* *
********************************************************************
last mod: based on code from Vegard Nossum
// Documentation:
/********************************************************************
This program makes an Ogg Theora file from a sequence of PPM images.
It expects the PPM images to be passed via stdin. The following
commands are used:
* Enqueue a new frame: "E " + to_string(length_of_ppm_image) + "\n" + ppm_image
* Repeat last frame: "R\n"
If the file "live_log" exists the last PNG for the live log is produced.
The output file path needs to be passed as CLI argument. Passing '-n'
prevents the actual video encoding so only the PNG is produced
anymore (as needed).
This program will wait until it recieves a TERM signal to complete the
video.
********************************************************************/
#define _FILE_OFFSET_BITS 64
#include "theora/theoraenc.h"
#include <cassert>
#include <cstdio>
#include <getopt.h>
#include <ogg/ogg.h>
#include <signal.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <unistd.h>
using namespace std;
const char* option_output;
static FILE* ogg_fp = NULL;
static ogg_stream_state ogg_os;
static ogg_packet op;
static ogg_page og;
static th_enc_ctx* td;
static th_info ti;
int loop = 1;
static int theora_write_frame(th_ycbcr_buffer ycbcr, int last)
{
ogg_packet op;
ogg_page og;
assert(ogg_fp);
/* Theora is a one-frame-in,one-frame-out system; submit a frame
for compression and pull out the packet */
if (th_encode_ycbcr_in(td, ycbcr)) {
fprintf(stderr, "%s: error: could not encode frame\n", option_output);
return 1;
}
while (true) {
int ret = th_encode_packetout(td, last, &op);
if (ret == 0)
return 0;
if (ret < 0) {
fprintf(stderr, "%s: error: could not read packets\n", option_output);
return 1;
}
ogg_stream_packetin(&ogg_os, &op);
while (ogg_stream_pageout(&ogg_os, &og)) {
fwrite(og.header, og.header_len, 1, ogg_fp);
fwrite(og.body, og.body_len, 1, ogg_fp);
}
}
}
static unsigned char clamp(int d)
{
if (d < 0)
return 0;
if (d > 255)
return 255;
return d;
}
#include <opencv2/core/core.hpp>
#include <opencv2/opencv.hpp>
#include <stdio.h>
using namespace cv;
void rgb_to_yuv(Mat* image, th_ycbcr_buffer ycbcr)
{
unsigned int x;
unsigned int y;
unsigned long yuv_w;
unsigned char* yuv_y;
unsigned char* yuv_u;
unsigned char* yuv_v;
unsigned long w, h;
w = yuv_w = 1024;
/* Must hold: yuv_h >= h */
h = 768;
yuv_w = ycbcr[0].width;
yuv_y = ycbcr[0].data;
yuv_u = ycbcr[1].data;
yuv_v = ycbcr[2].data;
/*This ignores gamma and RGB primary/whitepoint differences.
It also isn't terribly fast (though a decent compiler will
strength-reduce the division to a multiplication). */
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
unsigned char b = image->data[image->channels() * (image->cols * y + x) + 0];
unsigned char g = image->data[image->channels() * (image->cols * y + x) + 1];
unsigned char r = image->data[image->channels() * (image->cols * y + x) + 2];
yuv_y[x + y * yuv_w] = clamp((65481 * r + 128553 * g + 24966 * b + 4207500) / 255000);
yuv_u[x + y * yuv_w] = clamp((-33488 * r - 65744 * g + 99232 * b + 29032005) / 225930);
yuv_v[x + y * yuv_w] = clamp((157024 * r - 131488 * g - 25536 * b + 45940035) / 357510);
}
}
}
static int ilog(unsigned _v)
{
int ret;
for (ret = 0; _v; ret++)
_v >>= 1;
return ret;
}
bool need_last_png() { return !access("live_log", R_OK); }
int main(int argc, char* argv[])
{
th_comment tc;
int ret;
bool output_video = true;
int opt;
while ((opt = getopt(argc, argv, "n")) != -1) {
switch (opt) {
case 'n':
output_video = false;
break;
default: /* '?' */
fprintf(stderr,
"%s: [-n] CMDS OUTPUT - reads commands from CMDS until TERMed\n",
argv[0]);
exit(EXIT_FAILURE);
}
}
if (optind != argc - 1) {
fprintf(stderr, "Expected CMDS and OUTPUT\n");
exit(EXIT_FAILURE);
}
option_output = argv[optind];
if (output_video) {
ogg_fp = fopen(option_output, "wb");
if (!ogg_fp) {
fprintf(stderr, "%s: error: %s\n", option_output,
"couldn't open output file");
return 1;
}
}
srand(time(NULL));
if (ogg_stream_init(&ogg_os, rand())) {
fprintf(stderr, "%s: error: %s\n", option_output,
"couldn't create ogg stream state");
return 1;
}
unsigned int w = 1024;
unsigned int h = 768;
th_ycbcr_buffer ycbcr;
ycbcr[0].width = w;
ycbcr[0].height = h;
ycbcr[0].stride = w;
ycbcr[1].width = w;
ycbcr[1].stride = ycbcr[1].width;
ycbcr[1].height = h;
ycbcr[2].width = ycbcr[1].width;
ycbcr[2].stride = ycbcr[1].stride;
ycbcr[2].height = ycbcr[1].height;
ycbcr[0].data = (unsigned char*)malloc(ycbcr[0].stride * ycbcr[0].height);
ycbcr[1].data = (unsigned char*)malloc(ycbcr[1].stride * ycbcr[1].height);
ycbcr[2].data = (unsigned char*)malloc(ycbcr[2].stride * ycbcr[2].height);
ogg_uint32_t keyframe_frequency = 64;
th_info_init(&ti);
ti.frame_width = ((w + 15) >> 4) << 4;
ti.frame_height = ((h + 15) >> 4) << 4;
ti.pic_width = w;
ti.pic_height = h;
ti.pic_x = 0;
ti.pic_y = 0;
ti.fps_numerator = 24;
ti.fps_denominator = 1;
ti.aspect_numerator = 0;
ti.aspect_denominator = 0;
ti.colorspace = TH_CS_UNSPECIFIED;
ti.pixel_fmt = TH_PF_444;
ti.target_bitrate = -1;
ti.quality = 48; /* 63 is maximum */
ti.keyframe_granule_shift = ilog(keyframe_frequency - 1);
td = th_encode_alloc(&ti);
th_info_clear(&ti);
/* setting just the granule shift only allows power-of-two keyframe
spacing. Set the actual requested spacing. */
ret = th_encode_ctl(td, TH_ENCCTL_SET_KEYFRAME_FREQUENCY_FORCE,
&keyframe_frequency, sizeof(keyframe_frequency - 1));
if (ret < 0) {
fprintf(stderr, "Could not set keyframe interval to %d.\n",
(int)keyframe_frequency);
}
/* Get maximum encoding speed value (trade quality for speed) */
int splevel;
ret = th_encode_ctl(td, TH_ENCCTL_GET_SPLEVEL_MAX, &splevel, sizeof(int));
if (ret < 0)
fprintf(stderr, "Could not get SPLEVEL_MAX");
ret = th_encode_ctl(td, TH_ENCCTL_SET_SPLEVEL, &splevel, sizeof(int));
if (ret < 0)
fprintf(stderr, "Could not set SPLEVEL");
/* write the bitstream header packets with proper page interleave */
th_comment_init(&tc);
/* first packet will get its own page automatically */
if (th_encode_flushheader(td, &tc, &op) <= 0) {
fprintf(stderr, "Internal Theora library error.\n");
exit(1);
}
th_comment_clear(&tc);
ogg_stream_packetin(&ogg_os, &op);
if (ogg_stream_pageout(&ogg_os, &og) != 1) {
fprintf(stderr, "Internal Ogg library error.\n");
exit(1);
}
if (ogg_fp) {
fwrite(og.header, 1, og.header_len, ogg_fp);
fwrite(og.body, 1, og.body_len, ogg_fp);
}
/* create the remaining theora headers */
for (;;) {
ret = th_encode_flushheader(td, &tc, &op);
if (ret < 0) {
fprintf(stderr, "Internal Theora library error.\n");
exit(1);
} else if (!ret)
break;
ogg_stream_packetin(&ogg_os, &op);
}
/* Flush the rest of our headers. This ensures
the actual data in each stream will start
on a new page, as per spec. */
for (;;) {
int result = ogg_stream_flush(&ogg_os, &og);
if (result < 0) {
/* can't get here */
fprintf(stderr, "Internal Ogg library error.\n");
exit(1);
}
if (result == 0)
break;
if (ogg_fp) {
fwrite(og.header, 1, og.header_len, ogg_fp);
fwrite(og.body, 1, og.body_len, ogg_fp);
}
}
char line[PATH_MAX + 10];
int fsls = 0; // frames since last sync
Mat last_frame_image;
vector<uchar> buf;
bool last_frame_converted = false;
int repeat = -1;
while (fgets(line, PATH_MAX + 8, stdin)) {
line[strlen(line) - 1] = 0;
if (repeat >= (keyframe_frequency - 1) || line[0] != 'R') {
if (output_video && repeat >= 0) {
ret = th_encode_ctl(td, TH_ENCCTL_SET_DUP_COUNT, &repeat, sizeof(repeat));
if (ret < 0)
fprintf(stderr, "Could not set repeat count to %d.\n", repeat);
repeat = -1;
if (theora_write_frame(ycbcr, 0)) {
fprintf(stderr, "Encoding error.\n");
exit(1);
}
if (++fsls > 10) {
fflush(ogg_fp);
fsls = 0;
}
}
}
if (line[0] == 'E') {
int len = 0;
if (sscanf(line, "E %d", &len) != 1) {
fprintf(stderr, "Can't parse %s\n", line);
exit(1);
}
buf.resize(len);
size_t r = fread(&buf[0], len, 1, stdin);
if (r != 1) {
fprintf(stderr, "Unexpected end of data %ld\n", r);
exit(1);
}
last_frame_converted = false;
repeat = 0;
if (output_video || need_last_png()) {
last_frame_image = imdecode(buf, cv::IMREAD_COLOR, &last_frame_image);
if (!last_frame_image.data) {
cout << "Could not open or find the image" << endl;
return -1;
}
}
if (output_video)
rgb_to_yuv(&last_frame_image, ycbcr);
} else if (line[0] == 'R') {
// Just repeat the last frame
repeat++;
} else {
fprintf(stderr, "unknown command line: %s\n", line);
}
if (!last_frame_converted && need_last_png()) {
struct timeval tv;
gettimeofday(&tv, 0);
char path[PATH_MAX];
sprintf(path, "qemuscreenshot/%ld.%ld.png", tv.tv_sec, tv.tv_usec);
imwrite(path, last_frame_image);
unlink("qemuscreenshot/last.png");
symlink(basename(path), "qemuscreenshot/last.png");
last_frame_converted = true;
}
}
// send last frame
if (ogg_fp) {
th_encode_ctl(td, TH_ENCCTL_SET_DUP_COUNT, &repeat, sizeof(repeat));
theora_write_frame(ycbcr, 1);
}
th_encode_free(td);
free(ycbcr[0].data);
free(ycbcr[1].data);
free(ycbcr[2].data);
if (ogg_fp) {
if (ogg_stream_flush(&ogg_os, &og)) {
fwrite(og.header, og.header_len, 1, ogg_fp);
fwrite(og.body, og.body_len, 1, ogg_fp);
}
fflush(ogg_fp);
if (ogg_fp != stdout)
fclose(ogg_fp);
}
ogg_stream_clear(&ogg_os);
return 0;
}