#include <assert.h>
+#include <arpa/inet.h>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include "disk_space_estimator.h"
#include "ffmpeg_raii.h"
#include "flags.h"
+#include "frame_on_disk.h"
+#include "frame.pb.h"
#include "httpd.h"
#include "mainwindow.h"
#include "player.h"
#include "vaapi_jpeg_decoder.h"
#include <QApplication>
+#include <QGLFormat>
+#include <QSurfaceFormat>
#include <movit/init.h>
#include <movit/util.h>
using namespace std;
using namespace std::chrono;
+constexpr char frame_magic[] = "Ftbifrm0";
+constexpr size_t frame_magic_len = 8;
+
mutex RefCountedGLsync::fence_lock;
atomic<bool> should_quit{false};
// TODO: Replace by some sort of GUI control, I guess.
int64_t current_pts = 0;
-string filename_for_frame(unsigned stream_idx, int64_t pts)
+struct FrameFile {
+ FILE *fp = nullptr;
+ int filename_idx;
+ size_t frames_written_so_far = 0;
+};
+std::map<int, FrameFile> open_frame_files;
+
+mutex frame_mu;
+vector<FrameOnDisk> frames[MAX_STREAMS]; // Under frame_mu.
+vector<string> frame_filenames; // Under frame_mu.
+
+namespace {
+
+FrameOnDisk write_frame(int stream_idx, int64_t pts, const uint8_t *data, size_t size)
{
- char filename[256];
- snprintf(filename, sizeof(filename), "%s/frames/cam%d-pts%09ld.jpeg",
- global_flags.working_directory.c_str(), stream_idx, pts);
- return filename;
+ if (open_frame_files.count(stream_idx) == 0) {
+ char filename[256];
+ snprintf(filename, sizeof(filename), "%s/frames/cam%d-pts%09ld.frames",
+ global_flags.working_directory.c_str(), stream_idx, pts);
+ FILE *fp = fopen(filename, "wb");
+ if (fp == nullptr) {
+ perror(filename);
+ exit(1);
+ }
+
+ lock_guard<mutex> lock(frame_mu);
+ int filename_idx = frame_filenames.size();
+ frame_filenames.push_back(filename);
+ open_frame_files[stream_idx] = FrameFile{ fp, filename_idx, 0 };
+ }
+
+ FrameFile &file = open_frame_files[stream_idx];
+ string filename;
+ {
+ lock_guard<mutex> lock(frame_mu);
+ filename = frame_filenames[file.filename_idx];
+ }
+
+ FrameHeaderProto hdr;
+ hdr.set_stream_idx(stream_idx);
+ hdr.set_pts(pts);
+ hdr.set_file_size(size);
+
+ string serialized;
+ if (!hdr.SerializeToString(&serialized)) {
+ fprintf(stderr, "Frame header serialization failed.\n");
+ exit(1);
+ }
+ uint32_t len = htonl(serialized.size());
+
+ if (fwrite(frame_magic, frame_magic_len, 1, file.fp) != 1) {
+ perror("fwrite");
+ exit(1);
+ }
+ if (fwrite(&len, sizeof(len), 1, file.fp) != 1) {
+ perror("fwrite");
+ exit(1);
+ }
+ if (fwrite(serialized.data(), serialized.size(), 1, file.fp) != 1) {
+ perror("fwrite");
+ exit(1);
+ }
+ off_t offset = ftell(file.fp);
+ if (fwrite(data, size, 1, file.fp) != 1) {
+ perror("fwrite");
+ exit(1);
+ }
+ fflush(file.fp); // No fsync(), though. We can accept losing a few frames.
+ global_disk_space_estimator->report_write(filename, 8 + sizeof(len) + serialized.size() + size, pts);
+
+ if (++file.frames_written_so_far >= 1000) {
+ // Start a new file next time.
+ if (fclose(file.fp) != 0) {
+ perror("fclose");
+ exit(1);
+ }
+ open_frame_files.erase(stream_idx);
+
+ // TODO: Write to SQLite.
+ }
+
+ FrameOnDisk frame;
+ frame.pts = pts;
+ frame.filename_idx = file.filename_idx;
+ frame.offset = offset;
+ frame.size = size;
+
+ {
+ lock_guard<mutex> lock(frame_mu);
+ assert(stream_idx < MAX_STREAMS);
+ frames[stream_idx].push_back(frame);
+ }
+
+ return frame;
}
-mutex frame_mu;
-vector<int64_t> frames[MAX_STREAMS];
+} // namespace
+
HTTPD *global_httpd;
void load_existing_frames();
return ret;
}
+void load_frame_file(const char *filename, unsigned filename_idx)
+{
+ // TODO: Look up in the SQLite database.
+
+ FILE *fp = fopen(filename, "rb");
+ if (fp == nullptr) {
+ perror(filename);
+ exit(1);
+ }
+
+ size_t magic_offset = 0;
+ size_t skipped_bytes = 0;
+ while (!feof(fp) && !ferror(fp)) {
+ int ch = getc(fp);
+ if (ch == -1) {
+ break;
+ }
+ if (ch != frame_magic[magic_offset++]) {
+ skipped_bytes += magic_offset;
+ magic_offset = 0;
+ continue;
+ }
+ if (magic_offset < frame_magic_len) {
+ // Still reading the magic (hopefully).
+ continue;
+ }
+
+ // OK, found the magic. Try to parse the frame header.
+ magic_offset = 0;
+
+ if (skipped_bytes > 0) {
+ fprintf(stderr, "WARNING: %s: Skipped %zu garbage bytes in the middle.\n",
+ filename, skipped_bytes);
+ skipped_bytes = 0;
+ }
+
+ uint32_t len;
+ if (fread(&len, sizeof(len), 1, fp) != 1) {
+ fprintf(stderr, "WARNING: %s: Short read when getting length.\n", filename);
+ break;
+ }
+
+ string serialized;
+ serialized.resize(ntohl(len));
+ if (fread(&serialized[0], serialized.size(), 1, fp) != 1) {
+ fprintf(stderr, "WARNING: %s: Short read when reading frame header (%zu bytes).\n", filename, serialized.size());
+ break;
+ }
+
+ FrameHeaderProto hdr;
+ if (!hdr.ParseFromString(serialized)) {
+ fprintf(stderr, "WARNING: %s: Corrupted frame header.\n", filename);
+ continue;
+ }
+
+ FrameOnDisk frame;
+ frame.pts = hdr.pts();
+ frame.offset = ftell(fp);
+ frame.filename_idx = filename_idx;
+ frame.size = hdr.file_size();
+
+ if (fseek(fp, frame.offset + frame.size, SEEK_SET) == -1) {
+ fprintf(stderr, "WARNING: %s: Could not seek past frame (probably truncated).\n", filename);
+ continue;
+ }
+
+ if (hdr.stream_idx() >= 0 && hdr.stream_idx() < MAX_STREAMS) {
+ frames[hdr.stream_idx()].push_back(frame);
+ start_pts = max(start_pts, hdr.pts());
+ }
+ }
+
+ if (skipped_bytes > 0) {
+ fprintf(stderr, "WARNING: %s: Skipped %zu garbage bytes at the end.\n",
+ filename, skipped_bytes);
+ }
+}
+
void load_existing_frames()
{
string frame_dir = global_flags.working_directory + "/frames";
break;
}
- int stream_idx;
- int64_t pts;
- if (sscanf(de->d_name, "cam%d-pts%ld.jpeg", &stream_idx, &pts) == 2 &&
- stream_idx >= 0 && stream_idx < MAX_STREAMS) {
- frames[stream_idx].push_back(pts);
- start_pts = max(start_pts, pts);
+ if (de->d_type == DT_REG) {
+ string filename = frame_dir + "/" + de->d_name;
+ load_frame_file(filename.c_str(), frame_filenames.size());
+ frame_filenames.push_back(filename);
}
}
}
for (int stream_idx = 0; stream_idx < MAX_STREAMS; ++stream_idx) {
- sort(frames[stream_idx].begin(), frames[stream_idx].end());
+ sort(frames[stream_idx].begin(), frames[stream_idx].end(),
+ [](const auto &a, const auto &b) { return a.pts < b.pts; });
}
}
//fprintf(stderr, "Got a frame from camera %d, pts = %ld, size = %d\n",
// pkt.stream_index, pts, pkt.size);
- string filename = filename_for_frame(pkt.stream_index, pts);
- FILE *fp = fopen(filename.c_str(), "wb");
- if (fp == nullptr) {
- perror(filename.c_str());
- exit(1);
- }
- fwrite(pkt.data, pkt.size, 1, fp);
- fclose(fp);
-
- global_disk_space_estimator->report_write(filename, pts);
+ FrameOnDisk frame = write_frame(pkt.stream_index, pts, pkt.data, pkt.size);
- post_to_main_thread([pkt, pts] {
+ post_to_main_thread([pkt, frame] {
if (pkt.stream_index == 0) {
- global_mainwindow->ui->input1_display->setFrame(pkt.stream_index, pts);
+ global_mainwindow->ui->input1_display->setFrame(pkt.stream_index, frame);
} else if (pkt.stream_index == 1) {
- global_mainwindow->ui->input2_display->setFrame(pkt.stream_index, pts);
+ global_mainwindow->ui->input2_display->setFrame(pkt.stream_index, frame);
} else if (pkt.stream_index == 2) {
- global_mainwindow->ui->input3_display->setFrame(pkt.stream_index, pts);
+ global_mainwindow->ui->input3_display->setFrame(pkt.stream_index, frame);
} else if (pkt.stream_index == 3) {
- global_mainwindow->ui->input4_display->setFrame(pkt.stream_index, pts);
+ global_mainwindow->ui->input4_display->setFrame(pkt.stream_index, frame);
}
});
- assert(pkt.stream_index < MAX_STREAMS);
- frames[pkt.stream_index].push_back(pts);
-
if (last_pts != -1 && global_flags.slow_down_input) {
this_thread::sleep_for(microseconds((pts - last_pts) * 1000000 / TIMEBASE));
}
return 0;
}
+
+string read_frame(FrameOnDisk frame)
+{
+ string filename;
+ {
+ lock_guard<mutex> lock(frame_mu);
+ filename = frame_filenames[frame.filename_idx];
+ }
+
+ // TODO: cache the open file handles
+ FILE *fp = fopen(filename.c_str(), "rb");
+ if (fp == nullptr) {
+ perror(filename.c_str());
+ exit(1);
+ }
+ if (fseek(fp, frame.offset, SEEK_SET) == -1) {
+ perror("fseek");
+ exit(1);
+ }
+
+ string str;
+ str.resize(frame.size);
+ if (fread(&str[0], frame.size, 1, fp) != 1) {
+ perror("fread");
+ exit(1);
+ }
+
+ fclose(fp);
+ return str;
+}
projects / nageru / blobdiff