#include "context.h"
#include "defs.h"
+#include "flags.h"
#include "httpd.h"
#include "timebase.h"
using namespace std;
+// H.264 video comes out in encoding order (e.g. with two B-frames:
+// 0, 3, 1, 2, 6, 4, 5, etc.), but uncompressed video needs to
+// come in the right order. Since we do everything, including waiting
+// for the frames to come out of OpenGL, in encoding order, we need
+// a reordering buffer for uncompressed frames so that they come out
+// correctly. We go the super-lazy way of not making it understand
+// anything about the true order (which introduces some extra latency,
+// though); we know that for N B-frames we need at most (N-1) frames
+// in the reorder buffer, and can just sort on that.
+//
+// The class also deals with keeping a freelist as needed.
+class FrameReorderer {
+public:
+ FrameReorderer(unsigned queue_length, int width, int height);
+
+ // Returns the next frame to insert with its pts, if any. Otherwise -1 and nullptr.
+ // Does _not_ take ownership of data; a copy is taken if needed.
+ // The returned pointer is valid until the next call to reorder_frame, or destruction.
+ // As a special case, if queue_length == 0, will just return pts and data (no reordering needed).
+ pair<int64_t, const uint8_t *> reorder_frame(int64_t pts, const uint8_t *data);
+
+ // The same as reorder_frame, but without inserting anything. Used to empty the queue.
+ pair<int64_t, const uint8_t *> get_first_frame();
+
+ bool empty() const { return frames.empty(); }
+
+private:
+ unsigned queue_length;
+ int width, height;
+
+ priority_queue<pair<int64_t, uint8_t *>> frames;
+ stack<uint8_t *> freelist; // Includes the last value returned from reorder_frame.
+
+ // Owns all the pointers. Normally, freelist and frames could do this themselves,
+ // except priority_queue doesn't work well with movable-only types.
+ vector<unique_ptr<uint8_t[]>> owner;
+};
+
+FrameReorderer::FrameReorderer(unsigned queue_length, int width, int height)
+ : queue_length(queue_length), width(width), height(height)
+{
+ for (unsigned i = 0; i < queue_length; ++i) {
+ owner.emplace_back(new uint8_t[width * height * 2]);
+ freelist.push(owner.back().get());
+ }
+}
+
+pair<int64_t, const uint8_t *> FrameReorderer::reorder_frame(int64_t pts, const uint8_t *data)
+{
+ if (queue_length == 0) {
+ return make_pair(pts, data);
+ }
+
+ assert(!freelist.empty());
+ uint8_t *storage = freelist.top();
+ freelist.pop();
+ memcpy(storage, data, width * height * 2);
+ frames.emplace(-pts, storage); // Invert pts to get smallest first.
+
+ if (frames.size() >= queue_length) {
+ return get_first_frame();
+ } else {
+ return make_pair(-1, nullptr);
+ }
+}
+
+pair<int64_t, const uint8_t *> FrameReorderer::get_first_frame()
+{
+ assert(!frames.empty());
+ pair<int64_t, uint8_t *> storage = frames.top();
+ frames.pop();
+ int64_t pts = storage.first;
+ freelist.push(storage.second);
+ return make_pair(-pts, storage.second); // Re-invert pts (see reorder_frame()).
+}
+
class H264EncoderImpl {
public:
H264EncoderImpl(QSurface *surface, const string &va_display, int width, int height, HTTPD *httpd);
void encode_thread_func();
void encode_remaining_frames_as_p(int encoding_frame_num, int gop_start_display_frame_num, int64_t last_dts);
+ void add_packet_for_uncompressed_frame(int64_t pts, const uint8_t *data);
void encode_frame(PendingFrame frame, int encoding_frame_num, int display_frame_num, int gop_start_display_frame_num,
int frame_type, int64_t pts, int64_t dts);
void storage_task_thread();
AVCodecContext *context_audio;
AVFrame *audio_frame = nullptr;
HTTPD *httpd;
+ unique_ptr<FrameReorderer> reorderer;
Display *x11_display = nullptr;
return NULL;
}
use_zerocopy = true;
+ if (global_flags.uncompressed_video_to_http) {
+ fprintf(stderr, "Disabling zerocopy H.264 encoding due to --uncompressed_video_to_http.\n");
+ use_zerocopy = false;
+ }
return vaGetDisplay(x11_display);
} else if (va_display[0] != '/') {
x11_display = XOpenDisplay(va_display.c_str());
return NULL;
}
use_zerocopy = true;
+ if (global_flags.uncompressed_video_to_http) {
+ fprintf(stderr, "Disabling zerocopy H.264 encoding due to --uncompressed_video_to_http.\n");
+ use_zerocopy = false;
+ }
return vaGetDisplay(x11_display);
} else {
drm_fd = open(va_display.c_str(), O_RDWR);
pkt.flags = 0;
}
//pkt.duration = 1;
- httpd->add_packet(pkt, task.pts + global_delay, task.dts + global_delay);
+ httpd->add_packet(pkt, task.pts + global_delay, task.dts + global_delay,
+ global_flags.uncompressed_video_to_http ? HTTPD::DESTINATION_FILE_ONLY : HTTPD::DESTINATION_FILE_AND_HTTP);
}
// Encode and add all audio frames up to and including the pts of this video frame.
for ( ;; ) {
avcodec_encode_audio2(context_audio, &pkt, audio_frame, &got_output);
if (got_output) {
pkt.stream_index = 1;
- httpd->add_packet(pkt, audio_pts + global_delay, audio_pts + global_delay);
+ httpd->add_packet(pkt, audio_pts + global_delay, audio_pts + global_delay, HTTPD::DESTINATION_FILE_AND_HTTP);
}
// TODO: Delayed frames.
av_frame_unref(audio_frame);
//print_input();
+ if (global_flags.uncompressed_video_to_http) {
+ reorderer.reset(new FrameReorderer(ip_period - 1, frame_width, frame_height));
+ }
+
init_va(va_display);
setup_encode();
encode_frame(frame, encoding_frame_num++, display_frame_num, gop_start_display_frame_num, FRAME_P, frame.pts, dts);
last_dts = dts;
}
+
+ if (global_flags.uncompressed_video_to_http) {
+ // Add frames left in reorderer.
+ while (!reorderer->empty()) {
+ pair<int64_t, const uint8_t *> output_frame = reorderer->get_first_frame();
+ add_packet_for_uncompressed_frame(output_frame.first, output_frame.second);
+ }
+ }
+}
+
+void H264EncoderImpl::add_packet_for_uncompressed_frame(int64_t pts, const uint8_t *data)
+{
+ AVPacket pkt;
+ memset(&pkt, 0, sizeof(pkt));
+ pkt.buf = nullptr;
+ pkt.data = const_cast<uint8_t *>(data);
+ pkt.size = frame_width * frame_height * 2;
+ pkt.stream_index = 0;
+ pkt.flags = AV_PKT_FLAG_KEY;
+ httpd->add_packet(pkt, pts, pts, HTTPD::DESTINATION_HTTP_ONLY);
}
namespace {
va_status = vaUnmapBuffer(va_dpy, surf->surface_image.buf);
CHECK_VASTATUS(va_status, "vaUnmapBuffer");
+
+ if (global_flags.uncompressed_video_to_http) {
+ // Add uncompressed video. (Note that pts == dts here.)
+ const int64_t global_delay = int64_t(ip_period - 1) * (TIMEBASE / MAX_FPS); // Needs to match audio.
+ pair<int64_t, const uint8_t *> output_frame = reorderer->reorder_frame(pts + global_delay, reinterpret_cast<uint8_t *>(surf->y_ptr));
+ if (output_frame.second != nullptr) {
+ add_packet_for_uncompressed_frame(output_frame.first, output_frame.second);
+ }
+ }
}
va_status = vaDestroyImage(va_dpy, surf->surface_image.image_id);
projects / nageru / blobdiff