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render works and exports to output.mp4

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tomoron
2025-01-25 18:30:04 +01:00
parent 25187d60ce
commit cccdd259b4
2 changed files with 99 additions and 37 deletions
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118
srcs/class/Renderer.cpp
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@ -6,7 +6,7 @@
/* By: tomoron <tomoron@student.42angouleme.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2025/01/22 16:34:53 by tomoron #+# #+# */
/* Updated: 2025/01/25 03:25:48 by tomoron ### ########.fr */
/* Updated: 2025/01/25 18:28:19 by tomoron ### ########.fr */
/* */
/* ************************************************************************** */
@ -25,16 +25,25 @@ Renderer::Renderer(Scene *scene, Window *win)
_destPathIndex = 0;
_frameCount = 0;
_frame = 0;
_rgb_frame = 0;
_yuv_frame = 0;
_format = 0;
_codec_context = 0;
}
void Renderer::initFfmpeg(std::string filename)
void Renderer::initRender(std::string filename)
{
const AVCodec *codec;
AVStream *stream;
_destPathIndex = _path.size() - 1;
_curPathIndex = 0;
_frameCount = 0;
_curSamples = 0;
_curSplitStart = 0;
_testMode = 0;
_scene->getCamera()->setPosition(_path[0].pos);
_scene->getCamera()->setDirection(_path[0].dir.x, _path[0].dir.y);
avformat_alloc_output_context2(&_format, nullptr, nullptr, filename.c_str());
codec = avcodec_find_encoder(AV_CODEC_ID_H264);
if (!codec)
@ -45,7 +54,7 @@ void Renderer::initFfmpeg(std::string filename)
_codec_context->height = HEIGHT;
_codec_context->time_base = {1, _fps};
_codec_context->framerate = {_fps, 1};
_codec_context->pix_fmt = AV_PIX_FMT_RGB24;
_codec_context->pix_fmt = AV_PIX_FMT_YUV420P;
_codec_context->gop_size = 10;
_codec_context->max_b_frames = 1;
@ -55,11 +64,11 @@ void Renderer::initFfmpeg(std::string filename)
if (avcodec_open2(_codec_context, codec, nullptr) < 0)
throw std::runtime_error("Failed to open codec");
stream = avformat_new_stream(_format, codec);
if (!stream)
_stream = avformat_new_stream(_format, codec);
if (!_stream)
throw std::runtime_error("Failed to create stream");
stream->time_base = _codec_context->time_base;
avcodec_parameters_from_context(stream->codecpar, _codec_context);
_stream->time_base = _codec_context->time_base;
avcodec_parameters_from_context(_stream->codecpar, _codec_context);
if (!(_format->flags & AVFMT_NOFILE))
{
@ -68,11 +77,22 @@ void Renderer::initFfmpeg(std::string filename)
}
(void)avformat_write_header(_format, nullptr);
_frame = av_frame_alloc();
_frame->format = _codec_context->pix_fmt;
_frame->width = _codec_context->width;
_frame->height = _codec_context->height;
av_image_alloc(_frame->data, _frame->linesize, WIDTH, HEIGHT, _codec_context->pix_fmt, 32);
_rgb_frame = av_frame_alloc();
_rgb_frame->format = AV_PIX_FMT_RGB24;
_rgb_frame->width = WIDTH;
_rgb_frame->height = HEIGHT;
av_image_alloc(_rgb_frame->data, _rgb_frame->linesize, WIDTH, HEIGHT, AV_PIX_FMT_RGB24, 32);
_yuv_frame = av_frame_alloc();
_yuv_frame->format = _codec_context->pix_fmt;
_yuv_frame->width = WIDTH;
_yuv_frame->height = HEIGHT;
av_image_alloc(_yuv_frame->data, _yuv_frame->linesize, WIDTH, HEIGHT, _codec_context->pix_fmt, 32);
_sws_context = sws_getContext(
WIDTH, HEIGHT, AV_PIX_FMT_RGB24,
WIDTH, HEIGHT, AV_PIX_FMT_YUV420P,
SWS_BILINEAR, nullptr, nullptr, nullptr);
}
void Renderer::addImageToRender(Shader &shader)
@ -88,18 +108,28 @@ void Renderer::addImageToRender(Shader &shader)
{
for(int y = 0; y < HEIGHT; y++)
{
videoFrameOffset = (y * _frame->linesize[0]) + (x * 3);
outputImageOffset = (y * (WIDTH * 4)) + (x * 4);
_frame->data[0][videoFrameOffset] = image[outputImageOffset];
_frame->data[0][videoFrameOffset + 1] = image[outputImageOffset + 1];
_frame->data[0][videoFrameOffset + 2] = image[outputImageOffset + 2];
videoFrameOffset = (y * _rgb_frame->linesize[0]) + (x * 3);
outputImageOffset = (((HEIGHT - 1) - y) * (WIDTH * 4)) + (x * 4);
glm::vec3 colors(image[outputImageOffset], image[outputImageOffset + 1], image[outputImageOffset + 2]);
// if(colors.x > 1 || colors.y > 1 || colors.z > 1)
// colors = glm::normalize(colors);
colors.x = fmin(colors.x, 1);
colors.y = fmin(colors.y, 1);
colors.z = fmin(colors.z, 1);
_rgb_frame->data[0][videoFrameOffset] = colors.x * 255;
_rgb_frame->data[0][videoFrameOffset + 1] = colors.y * 255;
_rgb_frame->data[0][videoFrameOffset + 2] = colors.z * 255;
}
}
sws_scale(_sws_context, _rgb_frame->data, _rgb_frame->linesize, 0, HEIGHT, _yuv_frame->data, _yuv_frame->linesize);
_yuv_frame->pts = _frameCount;
_frame->pts = _frameCount;
if (avcodec_send_frame(_codec_context, _frame) == 0) {
if (avcodec_send_frame(_codec_context, _yuv_frame) == 0) {
pkt = av_packet_alloc();
while (avcodec_receive_packet(_codec_context, pkt) == 0) {
pkt->stream_index = _stream->index;
pkt->pts = av_rescale_q(pkt->pts, _codec_context->time_base, _stream->time_base);
pkt->dts = av_rescale_q(pkt->dts, _codec_context->time_base, _stream->time_base);
av_interleaved_write_frame(_format, pkt);
av_packet_unref(pkt);
}
@ -109,14 +139,29 @@ void Renderer::addImageToRender(Shader &shader)
void Renderer::endRender(void)
{
AVPacket *pkt;
avcodec_send_frame(_codec_context, 0);
pkt = av_packet_alloc();
while (avcodec_receive_packet(_codec_context, pkt) == 0) {
pkt->stream_index = _stream->index;
pkt->pts = av_rescale_q(pkt->pts, _codec_context->time_base, _stream->time_base);
pkt->dts = av_rescale_q(pkt->dts, _codec_context->time_base, _stream->time_base);
av_interleaved_write_frame(_format, pkt);
av_packet_unref(pkt);
}
av_packet_free(&pkt);
av_write_trailer(_format);
av_frame_free(&_frame);
av_frame_free(&_rgb_frame);
av_frame_free(&_yuv_frame);
avcodec_free_context(&_codec_context);
avio_close(_format->pb);
avformat_free_context(_format);
_format = 0;
_frame = 0;
_rgb_frame = 0;
_yuv_frame = 0;
_codec_context = 0;
}
@ -143,15 +188,23 @@ void Renderer::update(Shader &shader)
(void)shader;
if(!_destPathIndex)
return;
curTime = glfwGetTime();
_curSamples++;
if(_testMode && _curSamples == _testSamples)
{
makeMovement(curTime - _curSplitStart, curTime);
_curSamples = 0;
if((_testMode && _curSamples < _testSamples) || (!_testMode && _curSamples < _samples))
return;
if(_testMode)
curTime = glfwGetTime();
else
curTime = (1 / (double)_fps) * (double)_frameCount;
if(!_testMode)
{
addImageToRender(shader);
_frameCount++;
}
//TODO: the rest
makeMovement(curTime - _curSplitStart, curTime);
_curSamples = 0;
}
void Renderer::makeMovement(float timeFromStart, float curSplitTimeReset)
@ -187,7 +240,8 @@ void Renderer::makeMovement(float timeFromStart, float curSplitTimeReset)
if(_curPathIndex == _destPathIndex)
{
_destPathIndex = 0;
_testMode = 0;
if(!_testMode)
endRender();
}
}
@ -208,6 +262,10 @@ void Renderer::renderImgui(void)
_destPathIndex = _path.size() - 1;
_testMode = 1;
}
if(_path.size() && ImGui::Button("start render"))
{
initRender("output.mp4");
}
ImGui::Separator();
ImGui::SliderInt("minutes", &_min, 0, 2);