From 1c79dfed2c973b159b8f4a39a8087f772b70ceb0 Mon Sep 17 00:00:00 2001 From: Mikhail Burakov Date: Tue, 14 Mar 2023 08:40:53 +0100 Subject: Initial import of streamer source code --- .gitignore | 5 + LICENSE | 674 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ capture.c | 166 +++++++++++++++ capture.h | 30 +++ chroma.glsl | 42 ++++ encode.c | 242 ++++++++++++++++++++++ encode.h | 35 ++++ gpu.c | 563 ++++++++++++++++++++++++++++++++++++++++++++++++++ gpu.h | 45 ++++ luma.glsl | 30 +++ main.c | 156 ++++++++++++++ makefile | 39 ++++ util.h | 37 ++++ vertex.glsl | 28 +++ 14 files changed, 2092 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 capture.c create mode 100644 capture.h create mode 100644 chroma.glsl create mode 100644 encode.c create mode 100644 encode.h create mode 100644 gpu.c create mode 100644 gpu.h create mode 100644 luma.glsl create mode 100644 main.c create mode 100644 makefile create mode 100644 util.h create mode 100644 vertex.glsl diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..0302032 --- /dev/null +++ b/.gitignore @@ -0,0 +1,5 @@ +*.o +.clang-format +compile_commands.json +compile_flags.txt +streamer diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/capture.c b/capture.c new file mode 100644 index 0000000..6542c1d --- /dev/null +++ b/capture.c @@ -0,0 +1,166 @@ +/* + * 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 . + */ + +#include "capture.h" + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "gpu.h" +#include "util.h" + +struct CaptureContext { + int drm_fd; + struct GpuFrame* gpu_frame; +}; + +static int OpenAnyModule(void) { + static const char* const modules[] = { + "i915", "amdgpu", "radeon", "nouveau", "vmwgfx", + "omapdrm", "exynos", "tilcdc", "msm", "sti", + "tegra", "imx-drm", "rockchip", "atmel-hlcdc", "fsl-dcu-drm", + "vc4", "virtio_gpu", "mediatek", "meson", "pl111", + "stm", "sun4i-drm", "armada-drm", "komeda", "imx-dcss", + "mxsfb-drm", "simpledrm", "imx-lcdif", "vkms", + }; + for (size_t i = 0; i < LENGTH(modules); i++) { + int drm_fd = drmOpen(modules[i], NULL); + if (drm_fd >= 0) return drm_fd; + LOG("Failed to open %s (%s)", modules[i], strerror(errno)); + } + return -1; +} + +static void drmModeResPtrDestroy(drmModeResPtr* res) { + if (res && *res) drmModeFreeResources(*res); +} + +static void drmModeCrtcPtrDestroy(drmModeCrtcPtr* crtc) { + if (crtc && *crtc) drmModeFreeCrtc(*crtc); +} + +static void drmModeFB2PtrDestroy(drmModeFB2Ptr* fb2) { + if (fb2 && *fb2) drmModeFreeFB2(*fb2); +} + +static struct GpuFrame* WrapFramebuffer(int drm_fd, drmModeFB2Ptr fb2, + struct GpuContext* gpu_context) { + size_t nplanes = 0; + struct GpuFrame* result = NULL; + struct GpuFramePlane planes[LENGTH(fb2->handles)]; + for (; nplanes < LENGTH(planes) && fb2->handles[nplanes]; nplanes++) { + int status = drmPrimeHandleToFD(drm_fd, fb2->handles[nplanes], 0, + &planes[nplanes].dmabuf_fd); + if (status) { + LOG("Failed to get dmabuf fd (%d)", status); + goto release_planes; + } + planes[nplanes].offset = fb2->offsets[nplanes]; + planes[nplanes].pitch = fb2->pitches[nplanes]; + // TODO(mburakov): Structure of drmModeFB2 implies that all the planes have + // the same modifier. At the same time, surrounding code supports per-plane + // modifiers. So right now a drmModeFB2-wide modifier is just copypasted + // into each plane descriptor. + planes[nplanes].modifier = fb2->modifier; + } + + result = GpuFrameCreate(gpu_context, fb2->width, fb2->height, + fb2->pixel_format, nplanes, planes); + if (!result) LOG("Failed to create gpu frame"); + +release_planes: + for (; nplanes; nplanes--) close(planes[nplanes - 1].dmabuf_fd); + return result; +} + +static struct GpuFrame* GrabCrtc(int drm_fd, uint32_t crtc_id, + struct GpuContext* gpu_context) { + AUTO(drmModeCrtcPtr) crtc = drmModeGetCrtc(drm_fd, crtc_id); + if (!crtc) { + LOG("Failed to get crtc %u", crtc_id); + return NULL; + } + if (!crtc->buffer_id) { + LOG("Crtc %u has no framebuffer", crtc_id); + return NULL; + } + + AUTO(drmModeFB2Ptr) fb2 = drmModeGetFB2(drm_fd, crtc->buffer_id); + if (!fb2) { + LOG("Failed to get framebuffer %u", crtc->buffer_id); + return NULL; + } + if (!fb2->handles[0]) { + LOG("Framebuffer %u has no handles", crtc->buffer_id); + return NULL; + } + + LOG("Capturing framebuffer %u on crtc %u", crtc->buffer_id, crtc_id); + return WrapFramebuffer(drm_fd, fb2, gpu_context); +} + +struct CaptureContext* CaptureContextCreate(struct GpuContext* gpu_context) { + struct AUTO(CaptureContext)* capture_context = + malloc(sizeof(struct CaptureContext)); + if (!capture_context) { + LOG("Failed to allocate capture context (%s)", strerror(errno)); + return NULL; + } + *capture_context = (struct CaptureContext){ + .drm_fd = -1, + .gpu_frame = NULL, + }; + + capture_context->drm_fd = OpenAnyModule(); + if (capture_context->drm_fd == -1) return NULL; + + AUTO(drmModeResPtr) res = drmModeGetResources(capture_context->drm_fd); + if (!res) { + LOG("Failed to get drm mode resources (%s)", strerror(errno)); + return NULL; + } + + for (int i = 0; i < res->count_crtcs; i++) { + capture_context->gpu_frame = + GrabCrtc(capture_context->drm_fd, res->crtcs[i], gpu_context); + if (capture_context->gpu_frame) return RELEASE(capture_context); + } + + LOG("Nothing to capture"); + return NULL; +} + +const struct GpuFrame* CaptureContextGetFrame( + struct CaptureContext* capture_context) { + // TODO(mburakov): Verify nothing changed since last frame + return capture_context->gpu_frame; +} + +void CaptureContextDestroy(struct CaptureContext** capture_context) { + if (!capture_context || !*capture_context) return; + if ((*capture_context)->gpu_frame) + GpuFrameDestroy(&(*capture_context)->gpu_frame); + if ((*capture_context)->drm_fd != -1) drmClose((*capture_context)->drm_fd); + free(*capture_context); + capture_context = NULL; +} diff --git a/capture.h b/capture.h new file mode 100644 index 0000000..f351429 --- /dev/null +++ b/capture.h @@ -0,0 +1,30 @@ +/* + * 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 . + */ + +#ifndef STREAMER_CAPTURE_H_ +#define STREAMER_CAPTURE_H_ + +struct CaptureContext; +struct GpuContext; +struct GpuFrame; + +struct CaptureContext* CaptureContextCreate(struct GpuContext* gpu_context); +const struct GpuFrame* CaptureContextGetFrame( + struct CaptureContext* capture_context); +void CaptureContextDestroy(struct CaptureContext** capture_context); + +#endif // STREAMER_CAPTURE_H_ diff --git a/chroma.glsl b/chroma.glsl new file mode 100644 index 0000000..9004793 --- /dev/null +++ b/chroma.glsl @@ -0,0 +1,42 @@ +/* + * 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 . + */ + +uniform sampler2D img_input; +uniform mediump vec2 chroma_offsets; + +varying mediump vec2 texcoord; + +mediump vec2 rgb2chroma(in mediump vec4 rgb) { + // mburakov: This hardcodes BT.709 full-range. + mediump float y = rgb.r * 0.2126 + rgb.g * 0.7152 + rgb.b * 0.0722; + mediump float u = (rgb.b - y) / (2.0 * (1.0 - 0.0722)); + mediump float v = (rgb.r - y) / (2.0 * (1.0 - 0.2126)); + return vec2(u + 0.5, v + 0.5); +} + +void main() { + mediump vec2 sample_points[4]; + sample_points[0] = texcoord; + sample_points[1] = texcoord + vec2(chroma_offsets.x, 0.0); + sample_points[2] = texcoord + vec2(0.0, chroma_offsets.y); + sample_points[3] = texcoord + chroma_offsets; + mediump vec4 rgb = texture2D(img_input, sample_points[0]) + + texture2D(img_input, sample_points[1]) + + texture2D(img_input, sample_points[2]) + + texture2D(img_input, sample_points[3]); + gl_FragColor = vec4(rgb2chroma(rgb / 4.0), 0.0, 1.0); +} diff --git a/encode.c b/encode.c new file mode 100644 index 0000000..7b317f5 --- /dev/null +++ b/encode.c @@ -0,0 +1,242 @@ +/* + * 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 . + */ + +#include "encode.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "gpu.h" +#include "util.h" + +#define AVBufferRefDestroy av_buffer_unref +#define AVFrameDestroy av_frame_free +#define AVPacketDestroy av_packet_free + +struct EncodeContext { + struct GpuContext* gpu_context; + AVBufferRef* hwdevice_context; + AVCodecContext* codec_context; + + AVFrame* hw_frame; + struct GpuFrame* gpu_frame; +}; + +static bool SetHwFramesContext(struct EncodeContext* encode_context, int width, + int height) { + AUTO(AVBufferRef)* hwframes_context = + av_hwframe_ctx_alloc(encode_context->hwdevice_context); + if (!hwframes_context) { + LOG("Failed to allocate hwframes context"); + return false; + } + + AVHWFramesContext* hwframes_context_data = (void*)(hwframes_context->data); + hwframes_context_data->initial_pool_size = 8; + hwframes_context_data->format = AV_PIX_FMT_VAAPI; + hwframes_context_data->sw_format = AV_PIX_FMT_NV12; + hwframes_context_data->width = width; + hwframes_context_data->height = height; + int err = av_hwframe_ctx_init(hwframes_context); + if (err < 0) { + LOG("Failed to init hwframes context (%s)", av_err2str(err)); + return false; + } + + encode_context->codec_context->hw_frames_ctx = + av_buffer_ref(hwframes_context); + if (!encode_context->codec_context->hw_frames_ctx) { + LOG("Failed to ref hwframes context"); + return false; + } + + return true; +} + +struct EncodeContext* EncodeContextCreate(struct GpuContext* gpu_context, + uint32_t width, uint32_t height) { + struct AUTO(EncodeContext)* encode_context = + malloc(sizeof(struct EncodeContext)); + if (!encode_context) { + LOG("Failed to allocate encode context (%s)", strerror(errno)); + return NULL; + } + *encode_context = (struct EncodeContext){ + .gpu_context = gpu_context, + .hwdevice_context = NULL, + .codec_context = NULL, + .hw_frame = NULL, + .gpu_frame = NULL, + }; + + int err = av_hwdevice_ctx_create(&encode_context->hwdevice_context, + AV_HWDEVICE_TYPE_VAAPI, NULL, NULL, 0); + if (err < 0) { + LOG("Failed to create hwdevice context (%s)", av_err2str(err)); + return NULL; + } + + const AVCodec* codec = avcodec_find_encoder_by_name("h264_vaapi"); + if (!codec) { + LOG("Failed to find h264_vaapi encoder"); + return NULL; + } + + encode_context->codec_context = avcodec_alloc_context3(codec); + if (!encode_context->codec_context) { + LOG("Failed to allocate codec context"); + return NULL; + } + + encode_context->codec_context->time_base = (AVRational){1, 60}; + encode_context->codec_context->width = (int)width; + encode_context->codec_context->height = (int)height; + encode_context->codec_context->pix_fmt = AV_PIX_FMT_VAAPI; + encode_context->codec_context->max_b_frames = 0; + encode_context->codec_context->refs = 1; + encode_context->codec_context->global_quality = 18; + encode_context->codec_context->colorspace = AVCOL_SPC_BT709; + encode_context->codec_context->color_range = AVCOL_RANGE_JPEG; + + if (!encode_context->codec_context->hw_frames_ctx && + !SetHwFramesContext(encode_context, (int)width, (int)height)) { + LOG("Failed to set hwframes context"); + return NULL; + } + + err = avcodec_open2(encode_context->codec_context, codec, NULL); + if (err < 0) { + LOG("Failed to open codec (%s)", av_err2str(err)); + return NULL; + } + return RELEASE(encode_context); +} + +const struct GpuFrame* EncodeContextGetFrame( + struct EncodeContext* encode_context) { + AUTO(AVFrame)* hw_frame = av_frame_alloc(); + if (!hw_frame) { + LOG("Failed to allocate hwframe"); + return NULL; + } + + int err = av_hwframe_get_buffer(encode_context->codec_context->hw_frames_ctx, + hw_frame, 0); + if (err < 0) { + LOG("Failed to get hwframe buffer (%s)", av_err2str(err)); + return NULL; + } + if (!hw_frame->hw_frames_ctx) { + LOG("Failed to ref hwframe context"); + return NULL; + } + + // mburakov: Roughly based on Sunshine code... + AVVAAPIDeviceContext* vaapi_device_context = + ((AVHWDeviceContext*)(void*)encode_context->hwdevice_context->data) + ->hwctx; + VASurfaceID surface_id = (VASurfaceID)(uintptr_t)hw_frame->data[3]; + VADRMPRIMESurfaceDescriptor prime; + VAStatus status = vaExportSurfaceHandle( + vaapi_device_context->display, surface_id, + VA_SURFACE_ATTRIB_MEM_TYPE_DRM_PRIME_2, + VA_EXPORT_SURFACE_WRITE_ONLY | VA_EXPORT_SURFACE_COMPOSED_LAYERS, &prime); + if (status != VA_STATUS_SUCCESS) { + LOG("Failed to export vaapi surface (%d)", status); + return NULL; + } + + struct GpuFramePlane planes[prime.layers[0].num_planes]; + for (size_t i = 0; i < LENGTH(planes); i++) { + planes[i] = (struct GpuFramePlane){ + .dmabuf_fd = prime.objects[prime.layers[0].object_index[i]].fd, + .pitch = prime.layers[0].pitch[i], + .offset = prime.layers[0].offset[i], + .modifier = + prime.objects[prime.layers[0].object_index[i]].drm_format_modifier, + }; + } + struct AUTO(GpuFrame)* gpu_frame = + GpuFrameCreate(encode_context->gpu_context, prime.width, prime.height, + prime.fourcc, LENGTH(planes), planes); + if (!gpu_frame) { + LOG("Failed to create gpu frame"); + goto release_planes; + } + + encode_context->hw_frame = RELEASE(hw_frame); + encode_context->gpu_frame = RELEASE(gpu_frame); + +release_planes: + for (size_t i = LENGTH(planes); i; i--) close(planes[i - 1].dmabuf_fd); + return encode_context->gpu_frame; +} + +bool EncodeContextEncodeFrame(struct EncodeContext* encode_context) { + GpuFrameDestroy(&encode_context->gpu_frame); + AUTO(AVFrame)* hw_frame = RELEASE(encode_context->hw_frame); + AUTO(AVPacket)* packet = av_packet_alloc(); + if (!packet) { + LOG("Failed to allocate packet (%s)", strerror(errno)); + return false; + } + + int err = avcodec_send_frame(encode_context->codec_context, hw_frame); + if (err < 0) { + LOG("Failed to send frame (%s)", av_err2str(err)); + return false; + } + + for (;;) { + err = avcodec_receive_packet(encode_context->codec_context, packet); + switch (err) { + case 0: + break; + case AVERROR(EAGAIN): + case AVERROR_EOF: + return true; + default: + LOG("Failed to receive packet (%s)", av_err2str(err)); + return false; + } + + // TODO(mburakov): Why??? + packet->stream_index = 0; + write(STDOUT_FILENO, packet->data, (size_t)packet->size); + av_packet_unref(packet); + } +} + +void EncodeContextDestroy(struct EncodeContext** encode_context) { + if (!encode_context || !*encode_context) return; + if ((*encode_context)->gpu_frame) + GpuFrameDestroy(&(*encode_context)->gpu_frame); + if ((*encode_context)->hw_frame) av_frame_free(&(*encode_context)->hw_frame); + if ((*encode_context)->codec_context) + avcodec_free_context(&(*encode_context)->codec_context); + if ((*encode_context)->hwdevice_context) + av_buffer_unref(&(*encode_context)->hwdevice_context); +} diff --git a/encode.h b/encode.h new file mode 100644 index 0000000..1d44024 --- /dev/null +++ b/encode.h @@ -0,0 +1,35 @@ +/* + * 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 . + */ + +#ifndef STREAMER_ENCODE_H_ +#define STREAMER_ENCODE_H_ + +#include +#include + +struct EncodeContext; +struct GpuContext; +struct GpuFrame; + +struct EncodeContext* EncodeContextCreate(struct GpuContext* gpu_context, + uint32_t width, uint32_t height); +const struct GpuFrame* EncodeContextGetFrame( + struct EncodeContext* encode_context); +bool EncodeContextEncodeFrame(struct EncodeContext* encode_context); +void EncodeContextDestroy(struct EncodeContext** encode_context); + +#endif // STREAMER_ENCODE_H_ diff --git a/gpu.c b/gpu.c new file mode 100644 index 0000000..081acbe --- /dev/null +++ b/gpu.c @@ -0,0 +1,563 @@ +/* + * 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 . + */ + +#include "gpu.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +// Must be included last +#include + +#include "util.h" + +// TODO(mburakov): It should be theoretically possible to do everything in a +// single pass using a compute shader and GLES3. Unfortunately my test machine +// reports the primary framebuffer as multiplane. This is probably the reason +// why texture created from it can not be sampled using imageLoad in a compute +// shader even though it's still RGB. Fallback to GLES2 and per-plane textures +// for now, and figure out details later. + +extern const char _binary_vertex_glsl_start[]; +extern const char _binary_vertex_glsl_end[]; +extern const char _binary_luma_glsl_start[]; +extern const char _binary_luma_glsl_end[]; +extern const char _binary_chroma_glsl_start[]; +extern const char _binary_chroma_glsl_end[]; + +struct GpuContext { + EGLDisplay display; + EGLContext context; + PFNGLEGLIMAGETARGETTEXTURE2DOESPROC glEGLImageTargetTexture2DOES; + GLuint program_luma; + GLuint program_chroma; + GLint chroma_offsets; + GLuint framebuffer; + GLuint vertices; +}; + +struct GpuFrame { + struct GpuContext* gpu_context; + uint32_t width, height; + int dmabuf_fds[4]; + EGLImage images[2]; + GLuint textures[2]; +}; + +static const char* EglErrorString(EGLint error) { + static const char* const egl_error_strings[] = { + "EGL_SUCCESS", "EGL_NOT_INITIALIZED", "EGL_BAD_ACCESS", + "EGL_BAD_ALLOC", "EGL_BAD_ATTRIBUTE", "EGL_BAD_CONFIG", + "EGL_BAD_CONTEXT", "EGL_BAD_CURRENT_SURFACE", "EGL_BAD_DISPLAY", + "EGL_BAD_MATCH", "EGL_BAD_NATIVE_PIXMAP", "EGL_BAD_NATIVE_WINDOW", + "EGL_BAD_PARAMETER", "EGL_BAD_SURFACE", "EGL_CONTEXT_LOST", + }; + return EGL_SUCCESS <= error && error <= EGL_CONTEXT_LOST + ? egl_error_strings[error - EGL_SUCCESS] + : "???"; +} + +static const char* GlErrorString(GLenum error) { + static const char* const gl_error_strings[] = { + "GL_INVALID_ENUM", + "GL_INVALID_VALUE", + "GL_INVALID_OPERATION", + "GL_STACK_OVERFLOW", + "GL_STACK_UNDERFLOW", + "GL_OUT_OF_MEMORY", + "GL_INVALID_FRAMEBUFFER_OPERATION", + "GL_CONTEXT_LOST", + }; + if (error == GL_NO_ERROR) return "GL_NO_ERROR"; + return GL_INVALID_ENUM <= error && error <= GL_CONTEXT_LOST + ? gl_error_strings[error - GL_INVALID_ENUM] + : "???"; +} + +#define DEFINE_CHECK_BUILDABLE_FUNCTION(postfix, err_msg, getter_fn, \ + status_enum, logger_fn) \ + static bool CheckBuildable##postfix(GLuint buildable) { \ + GLenum error = glGetError(); \ + if (error != GL_NO_ERROR) { \ + LOG(err_msg " (%s)", GlErrorString(error)); \ + return false; \ + } \ + GLint status; \ + getter_fn(buildable, status_enum, &status); \ + if (status != GL_TRUE) { \ + GLint log_length; \ + getter_fn(buildable, GL_INFO_LOG_LENGTH, &log_length); \ + char message[log_length]; \ + memset(message, 0, sizeof(message)); \ + logger_fn(buildable, log_length, NULL, message); \ + LOG("%s", message); \ + return false; \ + } \ + return true; \ + } + +DEFINE_CHECK_BUILDABLE_FUNCTION(Shader, "Failed to compile shader", + glGetShaderiv, GL_COMPILE_STATUS, + glGetShaderInfoLog) +DEFINE_CHECK_BUILDABLE_FUNCTION(Program, "Failed to link program", + glGetProgramiv, GL_LINK_STATUS, + glGetProgramInfoLog) + +static bool HasExtension(const char* haystack, const char* needle) { + bool result = !!strstr(haystack, needle); + if (!result) LOG("Unsupported extension %s", needle); + return result; +} + +static GLuint CreateGlProgram(const char* vs_begin, const char* vs_end, + const char* fs_begin, const char* fs_end) { + GLuint program = 0; + GLuint vertex = glCreateShader(GL_VERTEX_SHADER); + if (!vertex) { + LOG("Failed to create vertex shader (%s)", GlErrorString(glGetError())); + goto bail_out; + } + GLsizei size = (GLsizei)(vs_end - vs_begin); + glShaderSource(vertex, 1, &vs_begin, &size); + glCompileShader(vertex); + if (!CheckBuildableShader(vertex)) goto delete_vs; + + GLuint fragment = glCreateShader(GL_FRAGMENT_SHADER); + if (!fragment) { + LOG("Failed to create fragment shader (%s)", GlErrorString(glGetError())); + goto delete_vs; + } + size = (GLsizei)(fs_end - fs_begin); + glShaderSource(fragment, 1, &fs_begin, &size); + glCompileShader(fragment); + if (!CheckBuildableShader(fragment)) goto delete_fs; + + program = glCreateProgram(); + if (!program) { + LOG("Failed to create shader program (%s)", GlErrorString(glGetError())); + goto delete_fs; + } + glAttachShader(program, vertex); + glAttachShader(program, fragment); + glLinkProgram(program); + if (!CheckBuildableProgram(program)) { + glDeleteProgram(program); + program = 0; + goto delete_fs; + } + +delete_fs: + glDeleteShader(fragment); +delete_vs: + glDeleteShader(vertex); +bail_out: + return program; +} + +static bool SetupImgInputUniform(GLuint program) { + GLint img_input = glGetUniformLocation(program, "img_input"); + if (img_input == -1) { + LOG("Failed to find img_input uniform (%s)", GlErrorString(glGetError())); + return false; + } + + glUseProgram(program); + glUniform1i(img_input, 0); + GLenum error = glGetError(); + if (error != GL_NO_ERROR) { + LOG("Failed to set img_input uniform (%s)", GlErrorString(glGetError())); + return false; + } + return true; +} + +struct GpuContext* GpuContextCreate(void) { + struct AUTO(GpuContext)* gpu_context = malloc(sizeof(struct GpuContext)); + if (!gpu_context) { + LOG("Failed to allocate gpu context (%s)", strerror(errno)); + return NULL; + } + *gpu_context = (struct GpuContext){ + .display = EGL_NO_DISPLAY, + .context = EGL_NO_CONTEXT, + .glEGLImageTargetTexture2DOES = NULL, + .program_luma = 0, + .program_chroma = 0, + .chroma_offsets = -1, + .framebuffer = 0, + .vertices = 0, + }; + + const char* egl_ext = eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS); + if (!egl_ext) { + LOG("Failed to query platformless egl extensions (%s)", + EglErrorString(eglGetError())); + return NULL; + } + + LOG("EGL_EXTENSIONS: %s", egl_ext); + if (!HasExtension(egl_ext, "EGL_MESA_platform_surfaceless")) return NULL; + gpu_context->display = + eglGetPlatformDisplay(EGL_PLATFORM_SURFACELESS_MESA, NULL, NULL); + if (gpu_context->display == EGL_NO_DISPLAY) { + LOG("Failed to get egl display (%s)", EglErrorString(eglGetError())); + return NULL; + } + + EGLint major, minor; + if (!eglInitialize(gpu_context->display, &major, &minor)) { + LOG("Failed to initialize egl display (%s)", EglErrorString(eglGetError())); + return NULL; + } + + LOG("Initialized EGL %d.%d", major, minor); + egl_ext = eglQueryString(gpu_context->display, EGL_EXTENSIONS); + if (!egl_ext) { + LOG("Failed to query egl extensions (%s)", EglErrorString(eglGetError())); + return NULL; + } + + LOG("EGL_EXTENSIONS: %s", egl_ext); + if (!HasExtension(egl_ext, "EGL_KHR_surfaceless_context") || + !HasExtension(egl_ext, "EGL_KHR_no_config_context") || + !HasExtension(egl_ext, "EGL_EXT_image_dma_buf_import") || + !HasExtension(egl_ext, "EGL_EXT_image_dma_buf_import_modifiers")) + return NULL; + + if (!eglBindAPI(EGL_OPENGL_ES_API)) { + LOG("Failed to bind egl api (%s)", EglErrorString(eglGetError())); + return NULL; + } + + static const EGLint context_attribs[] = { +#define _(...) __VA_ARGS__ + _(EGL_CONTEXT_MAJOR_VERSION, 3), + _(EGL_CONTEXT_MINOR_VERSION, 1), + EGL_NONE, +#undef _ + }; + gpu_context->context = eglCreateContext( + gpu_context->display, EGL_NO_CONFIG_KHR, EGL_NO_CONTEXT, context_attribs); + if (gpu_context->context == EGL_NO_CONTEXT) { + LOG("Failed to create egl context (%s)", EglErrorString(eglGetError())); + return NULL; + } + + if (!eglMakeCurrent(gpu_context->display, EGL_NO_SURFACE, EGL_NO_SURFACE, + gpu_context->context)) { + LOG("Failed to make egl context current (%s)", + EglErrorString(eglGetError())); + return NULL; + } + + const char* gl_ext = (const char*)glGetString(GL_EXTENSIONS); + if (!gl_ext) { + LOG("Failed to get gl extensions (%s)", GlErrorString(glGetError())); + return NULL; + } + + LOG("GL_EXTENSIONS: %s", gl_ext); + if (!HasExtension(gl_ext, "GL_OES_EGL_image")) return NULL; + gpu_context->glEGLImageTargetTexture2DOES = + (PFNGLEGLIMAGETARGETTEXTURE2DOESPROC)eglGetProcAddress( + "glEGLImageTargetTexture2DOES"); + if (!gpu_context->glEGLImageTargetTexture2DOES) { + LOG("Failed to lookup glEGLImageTargetTexture2DOES function"); + return NULL; + } + + gpu_context->program_luma = + CreateGlProgram(_binary_vertex_glsl_start, _binary_vertex_glsl_end, + _binary_luma_glsl_start, _binary_luma_glsl_end); + if (!gpu_context->program_luma || + !SetupImgInputUniform(gpu_context->program_luma)) { + LOG("Failed to create luma program"); + return NULL; + } + + gpu_context->program_chroma = + CreateGlProgram(_binary_vertex_glsl_start, _binary_vertex_glsl_end, + _binary_chroma_glsl_start, _binary_chroma_glsl_end); + if (!gpu_context->program_chroma || + !SetupImgInputUniform(gpu_context->program_luma)) { + LOG("Failed to create chroma program"); + return NULL; + } + gpu_context->chroma_offsets = + glGetUniformLocation(gpu_context->program_chroma, "chroma_offsets"); + if (gpu_context->chroma_offsets == -1) { + LOG("Failed to find chroma_offsets uniform (%s)", + GlErrorString(glGetError())); + return NULL; + } + + glGenFramebuffers(1, &gpu_context->framebuffer); + glBindFramebuffer(GL_FRAMEBUFFER, gpu_context->framebuffer); + glGenBuffers(1, &gpu_context->vertices); + glBindBuffer(GL_ARRAY_BUFFER, gpu_context->vertices); + static const GLfloat vertices[] = {0, 0, 1, 0, 1, 1, 0, 1}; + glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW); + glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, NULL); + glEnableVertexAttribArray(0); + GLenum error = glGetError(); + if (error != GL_NO_ERROR) { + LOG("Failed to create gl objects (%s)", GlErrorString(glGetError())); + return NULL; + } + return RELEASE(gpu_context); +} + +bool GpuContextSync(struct GpuContext* gpu_context) { + EGLSync sync = eglCreateSync(gpu_context->display, EGL_SYNC_FENCE, NULL); + if (sync == EGL_NO_SYNC) { + LOG("Failed to create egl fence sync (%s)", EglErrorString(eglGetError())); + return false; + } + eglClientWaitSync(gpu_context->display, sync, 0, EGL_FOREVER); + eglDestroySync(gpu_context->display, sync); + return true; +} + +void GpuContextDestroy(struct GpuContext** gpu_context) { + if (!gpu_context || !*gpu_context) return; + if ((*gpu_context)->vertices) glDeleteBuffers(1, &(*gpu_context)->vertices); + if ((*gpu_context)->framebuffer) + glDeleteFramebuffers(1, &(*gpu_context)->framebuffer); + if ((*gpu_context)->program_chroma) + glDeleteProgram((*gpu_context)->program_chroma); + if ((*gpu_context)->program_luma) + glDeleteProgram((*gpu_context)->program_luma); + if ((*gpu_context)->context != EGL_NO_CONTEXT) { + eglMakeCurrent((*gpu_context)->display, EGL_NO_SURFACE, EGL_NO_SURFACE, + EGL_NO_CONTEXT); + eglDestroyContext((*gpu_context)->display, (*gpu_context)->context); + } + if ((*gpu_context)->display != EGL_NO_DISPLAY) + eglTerminate((*gpu_context)->display); + free(*gpu_context); + *gpu_context = NULL; +} + +static EGLImage CreateEglImage(struct GpuContext* gpu_context, uint32_t width, + uint32_t height, uint32_t fourcc, size_t nplanes, + const struct GpuFramePlane* planes) { + static const EGLAttrib attrib_keys[] = { + EGL_DMA_BUF_PLANE0_FD_EXT, EGL_DMA_BUF_PLANE0_OFFSET_EXT, + EGL_DMA_BUF_PLANE0_PITCH_EXT, EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT, + EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT, EGL_DMA_BUF_PLANE1_FD_EXT, + EGL_DMA_BUF_PLANE1_OFFSET_EXT, EGL_DMA_BUF_PLANE1_PITCH_EXT, + EGL_DMA_BUF_PLANE1_MODIFIER_HI_EXT, EGL_DMA_BUF_PLANE1_MODIFIER_LO_EXT, + EGL_DMA_BUF_PLANE2_FD_EXT, EGL_DMA_BUF_PLANE2_OFFSET_EXT, + EGL_DMA_BUF_PLANE2_PITCH_EXT, EGL_DMA_BUF_PLANE2_MODIFIER_HI_EXT, + EGL_DMA_BUF_PLANE2_MODIFIER_LO_EXT, EGL_DMA_BUF_PLANE3_FD_EXT, + EGL_DMA_BUF_PLANE3_OFFSET_EXT, EGL_DMA_BUF_PLANE3_PITCH_EXT, + EGL_DMA_BUF_PLANE3_MODIFIER_HI_EXT, EGL_DMA_BUF_PLANE3_MODIFIER_LO_EXT, + }; + + EGLAttrib attrib_list[7 + LENGTH(attrib_keys) * 2] = { +#define _(...) __VA_ARGS__ + _(EGL_WIDTH, width), + _(EGL_HEIGHT, height), + _(EGL_LINUX_DRM_FOURCC_EXT, fourcc), +#undef _ + }; + + EGLAttrib* pairs = &attrib_list[6]; + const EGLAttrib* key = &attrib_keys[0]; + for (size_t i = 0; i < nplanes; i++) { + if (planes[i].dmabuf_fd == -1) break; + *pairs++ = *key++; + *pairs++ = planes[i].dmabuf_fd; + *pairs++ = *key++; + *pairs++ = planes[i].offset; + *pairs++ = *key++; + *pairs++ = planes[i].pitch; + *pairs++ = *key++; + *pairs++ = planes[i].modifier >> 32; + *pairs++ = *key++; + *pairs++ = planes[i].modifier & UINT32_MAX; + } + + *pairs = EGL_NONE; + EGLImage image = eglCreateImage(gpu_context->display, EGL_NO_CONFIG_KHR, + EGL_LINUX_DMA_BUF_EXT, NULL, attrib_list); + if (image == EGL_NO_IMAGE) + LOG("Failed to create egl image (%s)", EglErrorString(eglGetError())); + return image; +} + +static GLuint CreateTexture(struct GpuContext* gpu_context, EGLImage image) { + GLuint texture = 0; + glGenTextures(1, &texture); + glBindTexture(GL_TEXTURE_2D, texture); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + gpu_context->glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image); + + GLenum error = glGetError(); + if (error != GL_NO_ERROR) { + LOG("Failed to create texture (%s)", GlErrorString(error)); + glDeleteTextures(1, &texture); + return 0; + } + return texture; +} + +struct GpuFrame* GpuFrameCreate(struct GpuContext* gpu_context, uint32_t width, + uint32_t height, uint32_t fourcc, + size_t nplanes, + const struct GpuFramePlane* planes) { + struct AUTO(GpuFrame)* gpu_frame = malloc(sizeof(struct GpuFrame)); + if (!gpu_frame) { + LOG("Failed to allocate gpu frame (%s)", strerror(errno)); + return NULL; + } + *gpu_frame = (struct GpuFrame){ + .gpu_context = gpu_context, + .width = width, + .height = height, + .dmabuf_fds = {-1, -1, -1, -1}, + .images = {EGL_NO_IMAGE, EGL_NO_IMAGE}, + .textures = {0, 0}, + }; + + for (size_t i = 0; i < nplanes; i++) { + gpu_frame->dmabuf_fds[i] = dup(planes[i].dmabuf_fd); + if (gpu_frame->dmabuf_fds[i] == -1) { + LOG("Failed to dup dmabuf fd (%s)", strerror(errno)); + return NULL; + } + } + + struct GpuFramePlane dummy_planes[nplanes]; + for (size_t i = 0; i < nplanes; i++) { + dummy_planes[i] = (struct GpuFramePlane){ + .dmabuf_fd = gpu_frame->dmabuf_fds[i], + .offset = planes[i].offset, + .pitch = planes[i].pitch, + .modifier = planes[i].modifier, + }; + } + + if (fourcc == DRM_FORMAT_NV12) { + gpu_frame->images[0] = CreateEglImage(gpu_context, width, height, + DRM_FORMAT_R8, 1, &dummy_planes[0]); + if (gpu_frame->images[0] == EGL_NO_IMAGE) { + LOG("Failed to create luma plane image"); + return NULL; + } + gpu_frame->images[1] = CreateEglImage(gpu_context, width / 2, height / 2, + DRM_FORMAT_GR88, 1, &dummy_planes[1]); + if (gpu_frame->images[1] == EGL_NO_IMAGE) { + LOG("Failed to create chroma plane image"); + return NULL; + } + } else { + gpu_frame->images[0] = CreateEglImage(gpu_context, width, height, fourcc, + nplanes, dummy_planes); + if (gpu_frame->images[0] == EGL_NO_IMAGE) { + LOG("Failed to create multiplanar image"); + return NULL; + } + } + + for (size_t i = 0; i < LENGTH(gpu_frame->images); i++) { + if (gpu_frame->images[i] == EGL_NO_IMAGE) break; + gpu_frame->textures[i] = CreateTexture(gpu_context, gpu_frame->images[i]); + if (!gpu_frame->textures[i]) { + LOG("Failed to create texture"); + return NULL; + } + } + + return RELEASE(gpu_frame); +} + +void GpuFrameGetSize(const struct GpuFrame* gpu_frame, uint32_t* width, + uint32_t* height) { + *width = gpu_frame->width; + *height = gpu_frame->height; +} + +static bool GpuFrameConvertImpl(GLuint from, GLuint to) { + glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, + to, 0); + GLenum framebuffer_status = glCheckFramebufferStatus(GL_FRAMEBUFFER); + if (framebuffer_status != GL_FRAMEBUFFER_COMPLETE) { + LOG("Framebuffer is incomplete (0x%x)", framebuffer_status); + return false; + } + + glBindTexture(GL_TEXTURE_2D, from); + glDrawArrays(GL_TRIANGLE_FAN, 0, 4); + GLenum error = glGetError(); + if (error != GL_NO_ERROR) { + LOG("Failed to convert plane (%s)", GlErrorString(error)); + return false; + } + return true; +} + +bool GpuFrameConvert(const struct GpuFrame* from, const struct GpuFrame* to) { + glUseProgram(from->gpu_context->program_luma); + glViewport(0, 0, (GLsizei)to->width, (GLsizei)to->height); + if (!GpuFrameConvertImpl(from->textures[0], to->textures[0])) { + LOG("Failed to convert luma plane"); + return false; + } + + glUseProgram(from->gpu_context->program_chroma); + glUniform2f(from->gpu_context->chroma_offsets, 1.f / (GLfloat)from->width, + 1.f / (GLfloat)from->height); + glViewport(0, 0, (GLsizei)to->width / 2, (GLsizei)to->height / 2); + if (!GpuFrameConvertImpl(from->textures[0], to->textures[1])) { + LOG("Failed to convert chroma plane"); + return false; + } + return true; +} + +void GpuFrameDestroy(struct GpuFrame** gpu_frame) { + if (!gpu_frame || !*gpu_frame) return; + for (size_t i = LENGTH((*gpu_frame)->textures); i; i--) { + if ((*gpu_frame)->textures[i]) + glDeleteTextures(1, &(*gpu_frame)->textures[i]); + } + for (size_t i = LENGTH((*gpu_frame)->images); i; i--) { + if ((*gpu_frame)->images[i] != EGL_NO_IMAGE) + eglDestroyImage((*gpu_frame)->gpu_context->display, + (*gpu_frame)->images[i]); + } + for (size_t i = LENGTH((*gpu_frame)->dmabuf_fds); i; i--) { + if ((*gpu_frame)->dmabuf_fds[i] != -1) close((*gpu_frame)->dmabuf_fds[i]); + } + free(*gpu_frame); + *gpu_frame = NULL; +} diff --git a/gpu.h b/gpu.h new file mode 100644 index 0000000..a57ada0 --- /dev/null +++ b/gpu.h @@ -0,0 +1,45 @@ +/* + * 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 . + */ + +#ifndef STREAMER_GPU_H_ +#define STREAMER_GPU_H_ + +#include +#include +#include + +struct GpuFramePlane { + int dmabuf_fd; + uint32_t pitch; + uint32_t offset; + uint64_t modifier; +}; + +struct GpuContext* GpuContextCreate(void); +bool GpuContextSync(struct GpuContext* gpu_context); +void GpuContextDestroy(struct GpuContext** gpu_context); + +struct GpuFrame* GpuFrameCreate(struct GpuContext* gpu_context, uint32_t width, + uint32_t height, uint32_t fourcc, + size_t nplanes, + const struct GpuFramePlane* planes); +void GpuFrameGetSize(const struct GpuFrame* gpu_frame, uint32_t* width, + uint32_t* height); +bool GpuFrameConvert(const struct GpuFrame* from, const struct GpuFrame* to); +void GpuFrameDestroy(struct GpuFrame** gpu_frame); + +#endif // STREAMER_GPU_H_ diff --git a/luma.glsl b/luma.glsl new file mode 100644 index 0000000..cc56377 --- /dev/null +++ b/luma.glsl @@ -0,0 +1,30 @@ +/* + * 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 . + */ + +uniform sampler2D img_input; + +varying mediump vec2 texcoord; + +mediump float rgb2luma(in mediump vec4 rgb) { + // mburakov: This hardcodes BT.709 full-range. + return rgb.r * 0.2126 + rgb.g * 0.7152 + rgb.b * 0.0722; +} + +void main() { + mediump vec4 rgb = texture2D(img_input, texcoord); + gl_FragColor = vec4(rgb2luma(rgb), 0.0, 0.0, 1.0); +} diff --git a/main.c b/main.c new file mode 100644 index 0000000..0c3138a --- /dev/null +++ b/main.c @@ -0,0 +1,156 @@ +/* + * 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 . + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#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; +} diff --git a/makefile b/makefile new file mode 100644 index 0000000..c3146b8 --- /dev/null +++ b/makefile @@ -0,0 +1,39 @@ +bin:=$(notdir $(shell pwd)) +src:=$(shell ls *.c) +obj:=$(src:.c=.o) + +libs:=\ + egl \ + glesv2 \ + libavcodec \ + libavutil \ + libdrm \ + libva + +res:=\ + vertex.glsl \ + luma.glsl \ + chroma.glsl + + +CFLAGS+=$(shell pkg-config --cflags $(libs)) +LDFLAGS+=$(shell pkg-config --libs $(libs)) + +comma:=, +LDFLAGS+= \ + -Wl,--format=binary \ + $(patsubst %,-Wl$(comma)%,$(res)) \ + -Wl,--format=default + +all: $(bin) + +$(bin): $(obj) + $(CC) $^ $(LDFLAGS) -o $@ + +%.o: %.c *.h $(res) + $(CC) -c $< $(CFLAGS) -o $@ + +clean: + -rm $(bin) $(obj) + +.PHONY: all clean diff --git a/util.h b/util.h new file mode 100644 index 0000000..18e8c5e --- /dev/null +++ b/util.h @@ -0,0 +1,37 @@ +/* + * 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 . + */ + +#ifndef STREAMER_UTIL_H_ +#define STREAMER_UTIL_H_ + +#define STR_IMPL(x) #x +#define STR(x) STR_IMPL(x) +#define LOG(fmt, ...) \ + fprintf(stderr, __FILE__ ":" STR(__LINE__) " " fmt "\n", ##__VA_ARGS__) +#define AUTO(x) x __attribute__((__cleanup__(x##Destroy))) +#define RELEASE(x) Release((void**)&x) +#define LENGTH(x) (sizeof(x) / sizeof *(x)) +#define MAX(a, b) ((a) > (b) ? (a) : (b)) +#define MIN(a, b) ((a) < (b) ? (a) : (b)) + +static inline void* Release(void** x) { + void* result = *x; + *x = 0; + return result; +} + +#endif // STREAMER_UTIL_H_ diff --git a/vertex.glsl b/vertex.glsl new file mode 100644 index 0000000..29c4f4a --- /dev/null +++ b/vertex.glsl @@ -0,0 +1,28 @@ +/* + * 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 . + */ + +attribute vec2 position; + +varying vec2 texcoord; + +void main() { + texcoord = position; + mat4 transform_matrix = + mat4(vec4(2.0, 0.0, 0.0, 0.0), vec4(0.0, 2.0, 0.0, 0.0), + vec4(0.0, 0.0, 2.0, 0.0), vec4(-1.0, -1.0, 0.0, 1.0)); + gl_Position = transform_matrix * vec4(position, 0.0, 1.0); +} -- cgit v1.2.3