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/*
* Copyright (C) 2023 Mikhail Burakov. This file is part of streamer.
*
* streamer 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 3 of the License, or
* (at your option) any later version.
*
* streamer 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 streamer. If not, see <https://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "capture.h"
#include "encode.h"
#include "gpu.h"
#include "util.h"
static volatile sig_atomic_t g_signal;
static void OnSignal(int status) { g_signal = status; }
struct TimingStats {
unsigned long long min;
unsigned long long max;
unsigned long long sum;
};
static void TimingStatsRecord(struct TimingStats* timing_stats,
unsigned long long value) {
timing_stats->min = MIN(timing_stats->min, value);
timing_stats->max = MAX(timing_stats->max, value);
timing_stats->sum += value;
}
static void TimingStatsLog(const struct TimingStats* timing_stats,
const char* name, unsigned long long counter) {
LOG("%s min/avg/max: %llu/%llu/%llu", name, timing_stats->min,
timing_stats->sum / counter, timing_stats->max);
}
static unsigned long long MicrosNow(void) {
struct timespec ts = {.tv_sec = 0, .tv_nsec = 0};
clock_gettime(CLOCK_MONOTONIC, &ts);
return (unsigned long long)ts.tv_sec * 1000000ull +
(unsigned long long)ts.tv_nsec / 1000ull;
}
int main(int argc, char* argv[]) {
(void)argc;
(void)argv;
if (signal(SIGINT, OnSignal) == SIG_ERR ||
signal(SIGTERM, OnSignal) == SIG_ERR) {
LOG("Failed to set signal handlers (%s)", strerror(errno));
return EXIT_FAILURE;
}
struct AUTO(GpuContext)* gpu_context = GpuContextCreate();
if (!gpu_context) {
LOG("Failed to create gpu context");
return EXIT_FAILURE;
}
struct AUTO(CaptureContext)* capture_context =
CaptureContextCreate(gpu_context);
if (!capture_context) {
LOG("Failed to create capture context");
return EXIT_FAILURE;
}
struct AUTO(EncodeContext)* encode_context = NULL;
struct TimingStats capture = {.min = ULLONG_MAX};
struct TimingStats convert = {.min = ULLONG_MAX};
struct TimingStats encode = {.min = ULLONG_MAX};
struct TimingStats total = {.min = ULLONG_MAX};
unsigned long long num_frames = 0;
static const unsigned long long delta = 1000000ull / 60ull;
for (unsigned long long next = MicrosNow() + delta; !g_signal;
next += delta) {
unsigned long long before_capture = MicrosNow();
const struct GpuFrame* captured_frame =
CaptureContextGetFrame(capture_context);
if (!captured_frame) {
LOG("Failed to capture frame");
return EXIT_FAILURE;
}
if (!encode_context) {
uint32_t width, height;
GpuFrameGetSize(captured_frame, &width, &height);
encode_context = EncodeContextCreate(gpu_context, width, height);
if (!encode_context) {
LOG("Failed to create encode context");
return EXIT_FAILURE;
}
}
const struct GpuFrame* encoded_frame =
EncodeContextGetFrame(encode_context);
if (!encoded_frame) {
LOG("Failed to get encoded frame");
return EXIT_FAILURE;
}
unsigned long long before_convert = MicrosNow();
if (!GpuFrameConvert(captured_frame, encoded_frame)) {
LOG("Failed to convert frame");
return EXIT_FAILURE;
}
GpuContextSync(gpu_context);
unsigned long long before_encode = MicrosNow();
if (!EncodeContextEncodeFrame(encode_context)) {
LOG("Failed to encode frame");
return EXIT_FAILURE;
}
unsigned long long now = MicrosNow();
if (num_frames++) {
// mburakov: Do not record stats for first (lazy) frame.
TimingStatsRecord(&capture, before_convert - before_capture);
TimingStatsRecord(&convert, before_encode - before_convert);
TimingStatsRecord(&encode, now - before_encode);
TimingStatsRecord(&total, now - before_capture);
}
unsigned long long micros = now < next ? next - now : 0;
if (micros) usleep((unsigned)micros);
}
if (!EncodeContextEncodeFrame(encode_context)) {
LOG("Failed to drain encoder");
return EXIT_FAILURE;
}
num_frames--;
TimingStatsLog(&capture, "Capture", num_frames);
TimingStatsLog(&convert, "Convert", num_frames);
TimingStatsLog(&encode, "Encode", num_frames);
TimingStatsLog(&total, "Total", num_frames);
return EXIT_SUCCESS;
}
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