#include <libavformat/avio.h>
}
+#include <unistd.h>
+
+#include "context.h"
+#include "flow.h"
#include "httpd.h"
#include "jpeg_frame_view.h"
+#include "movit/util.h"
#include "mux.h"
#include "player.h"
+#include "util.h"
+
+#include <epoxy/glx.h>
using namespace std;
} // namespace
+VideoStream::VideoStream()
+{
+ using namespace movit;
+ // TODO: deduplicate code against JPEGFrameView?
+ ycbcr_convert_chain.reset(new EffectChain(1280, 720));
+ ImageFormat image_format;
+ image_format.color_space = COLORSPACE_sRGB;
+ image_format.gamma_curve = GAMMA_sRGB;
+ ycbcr_format.luma_coefficients = YCBCR_REC_709;
+ ycbcr_format.full_range = false;
+ ycbcr_format.num_levels = 256;
+ ycbcr_format.chroma_subsampling_x = 2;
+ ycbcr_format.chroma_subsampling_y = 1;
+ ycbcr_format.cb_x_position = 0.0f; // H.264 -- _not_ JPEG, even though our input is MJPEG-encoded
+ ycbcr_format.cb_y_position = 0.5f; // Irrelevant.
+ ycbcr_format.cr_x_position = 0.0f;
+ ycbcr_format.cr_y_position = 0.5f;
+ ycbcr_input = (movit::YCbCrInput *)ycbcr_convert_chain->add_input(new YCbCrInput(image_format, ycbcr_format, 1280, 720));
+
+ ImageFormat inout_format;
+ inout_format.color_space = COLORSPACE_sRGB;
+ inout_format.gamma_curve = GAMMA_sRGB;
+
+ check_error();
+ ycbcr_convert_chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
+ check_error();
+ ycbcr_convert_chain->set_dither_bits(8);
+ check_error();
+ ycbcr_convert_chain->finalize();
+ check_error();
+
+ GLuint input_tex[num_interpolate_slots], gray_tex[num_interpolate_slots];
+ glCreateTextures(GL_TEXTURE_2D_ARRAY, 10, input_tex);
+ glCreateTextures(GL_TEXTURE_2D_ARRAY, 10, gray_tex);
+ check_error();
+ constexpr size_t width = 1280, height = 720; // FIXME: adjustable width, height
+ int levels = find_num_levels(width, height);
+ for (size_t i = 0; i < num_interpolate_slots; ++i) {
+ glTextureStorage3D(input_tex[i], levels, GL_RGBA8, width, height, 2);
+ check_error();
+ glTextureStorage3D(gray_tex[i], levels, GL_R8, width, height, 2);
+ check_error();
+
+ InterpolatedFrameResources resource;
+ resource.input_tex = input_tex[i];
+ resource.gray_tex = gray_tex[i];
+ glCreateFramebuffers(2, resource.input_fbos);
+ check_error();
+
+ glNamedFramebufferTextureLayer(resource.input_fbos[0], GL_COLOR_ATTACHMENT0, input_tex[i], 0, 0);
+ check_error();
+ glNamedFramebufferTextureLayer(resource.input_fbos[1], GL_COLOR_ATTACHMENT0, input_tex[i], 0, 1);
+ check_error();
+
+ GLuint buf = GL_COLOR_ATTACHMENT0;
+ glNamedFramebufferDrawBuffers(resource.input_fbos[0], 1, &buf);
+ check_error();
+ glNamedFramebufferDrawBuffers(resource.input_fbos[1], 1, &buf);
+ check_error();
+
+ glCreateBuffers(1, &resource.pbo);
+ check_error();
+ glNamedBufferStorage(resource.pbo, width * height * 4, nullptr, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
+ check_error();
+ resource.pbo_contents = glMapNamedBufferRange(resource.pbo, 0, width * height * 4, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
+ interpolate_resources.push_back(resource);
+ }
+
+ check_error();
+
+ compute_flow.reset(new DISComputeFlow(width, height, operating_point3));
+ gray.reset(new GrayscaleConversion); // NOTE: Must come after DISComputeFlow, since it sets up the VBO!
+ interpolate.reset(new Interpolate(width, height, operating_point3));
+ check_error();
+}
+
+VideoStream::~VideoStream() {}
+
void VideoStream::start()
{
AVFormatContext *avctx = avformat_alloc_context();
void VideoStream::schedule_original_frame(int64_t output_pts, unsigned stream_idx, int64_t input_pts)
{
- unique_lock<mutex> lock(queue_lock);
QueuedFrame qf;
+ qf.type = QueuedFrame::ORIGINAL;
qf.output_pts = output_pts;
qf.stream_idx = stream_idx;
qf.input_first_pts = input_pts;
+
+ unique_lock<mutex> lock(queue_lock);
+ frame_queue.push_back(qf);
+ queue_nonempty.notify_all();
+}
+
+void VideoStream::schedule_interpolated_frame(int64_t output_pts, unsigned stream_idx, int64_t input_first_pts, int64_t input_second_pts, float alpha)
+{
+ // Get the temporary OpenGL resources we need for doing the interpolation.
+ InterpolatedFrameResources resources;
+ {
+ unique_lock<mutex> lock(queue_lock);
+ if (interpolate_resources.empty()) {
+ fprintf(stderr, "WARNING: Too many interpolated frames already in transit; dropping one.\n");
+ return;
+ }
+ resources = interpolate_resources.front();
+ interpolate_resources.pop_front();
+ }
+
+ QueuedFrame qf;
+ qf.type = QueuedFrame::INTERPOLATED;
+ qf.output_pts = output_pts;
+ qf.stream_idx = stream_idx;
+ qf.resources = resources;
+
+ check_error();
+
+ // Convert frame0 and frame1 to OpenGL textures.
+ // TODO: Deduplicate against JPEGFrameView::setDecodedFrame?
+ for (size_t frame_no = 0; frame_no < 2; ++frame_no) {
+ shared_ptr<Frame> frame = decode_jpeg(filename_for_frame(stream_idx, frame_no == 1 ? input_second_pts : input_first_pts));
+ ycbcr_format.chroma_subsampling_x = frame->chroma_subsampling_x;
+ ycbcr_format.chroma_subsampling_y = frame->chroma_subsampling_y;
+ ycbcr_input->change_ycbcr_format(ycbcr_format);
+ ycbcr_input->set_width(frame->width);
+ ycbcr_input->set_height(frame->height);
+ ycbcr_input->set_pixel_data(0, frame->y.get());
+ ycbcr_input->set_pixel_data(1, frame->cb.get());
+ ycbcr_input->set_pixel_data(2, frame->cr.get());
+ ycbcr_input->set_pitch(0, frame->pitch_y);
+ ycbcr_input->set_pitch(1, frame->pitch_chroma);
+ ycbcr_input->set_pitch(2, frame->pitch_chroma);
+ ycbcr_convert_chain->render_to_fbo(resources.input_fbos[frame_no], 1280, 720);
+ }
+
+ glGenerateTextureMipmap(resources.input_tex);
+
+ // Compute the interpolated frame.
+ check_error();
+ gray->exec(resources.input_tex, resources.gray_tex, 1280, 720, /*num_layers=*/2);
+ check_error();
+ glGenerateTextureMipmap(resources.gray_tex);
+ check_error();
+ GLuint flow_tex = compute_flow->exec(resources.gray_tex, DISComputeFlow::FORWARD_AND_BACKWARD, DISComputeFlow::DO_NOT_RESIZE_FLOW);
+ check_error();
+
+ qf.output_tex = interpolate->exec(resources.input_tex, flow_tex, 1280, 720, alpha);
+ check_error();
+
+ // Read it down (asynchronously) to the CPU.
+ glPixelStorei(GL_PACK_ROW_LENGTH, 0);
+ glBindBuffer(GL_PIXEL_PACK_BUFFER, resources.pbo);
+ check_error();
+ glGetTextureImage(qf.output_tex, 0, GL_RGBA, GL_UNSIGNED_BYTE, 1280 * 720 * 4, nullptr);
+ check_error();
+ glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
+
+ // Set a fence we can wait for to make sure the CPU sees the read.
+ glMemoryBarrier(GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT);
+ check_error();
+ qf.fence = RefCountedGLsync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
+ check_error();
+
+ unique_lock<mutex> lock(queue_lock);
frame_queue.push_back(qf);
queue_nonempty.notify_all();
}
void VideoStream::encode_thread_func()
{
+ QSurface *surface = create_surface();
+ QOpenGLContext *context = create_context(surface);
+ bool ok = make_current(context, surface);
+ if (!ok) {
+ fprintf(stderr, "Video stream couldn't get an OpenGL context\n");
+ exit(1);
+ }
+
for ( ;; ) {
QueuedFrame qf;
{
}
if (qf.type == QueuedFrame::ORIGINAL) {
+ // Send the JPEG frame on, unchanged.
string jpeg = read_file(filename_for_frame(qf.stream_idx, qf.input_first_pts));
AVPacket pkt;
av_init_packet(&pkt);
pkt.data = (uint8_t *)jpeg.data();
pkt.size = jpeg.size();
stream_mux->add_packet(pkt, qf.output_pts, qf.output_pts);
- }
+ } else if (qf.type == QueuedFrame::INTERPOLATED) {
+ glClientWaitSync(qf.fence.get(), /*flags=*/0, GL_TIMEOUT_IGNORED);
+
+ // DEBUG: Writing the frame to disk.
+ FILE *fp = fopen("inter.ppm", "wb");
+ fprintf(fp, "P6\n%d %d\n255\n", 1280, 720);
+ for (size_t y = 0; y < 720; ++y) {
+ const uint8_t *ptr = (uint8_t *)qf.resources.pbo_contents + (719 - y) * 1280 * 4;
+ for (size_t x = 0; x < 1280; ++x) {
+ putc(ptr[0], fp);
+ putc(ptr[1], fp);
+ putc(ptr[2], fp);
+ ptr += 4;
+ }
+ }
+ fclose(fp);
+ // TODO: Release flow and output textures.
+
+ // Put the frame resources back.
+ unique_lock<mutex> lock(queue_lock);
+ interpolate_resources.push_back(qf.resources);
+ }
}
}
projects / nageru / blobdiff