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| -rw-r--r-- | .gitignore | 5 | ||||
| -rw-r--r-- | LICENSE | 674 | ||||
| -rw-r--r-- | capture.c | 166 | ||||
| -rw-r--r-- | capture.h | 30 | ||||
| -rw-r--r-- | chroma.glsl | 42 | ||||
| -rw-r--r-- | encode.c | 242 | ||||
| -rw-r--r-- | encode.h | 35 | ||||
| -rw-r--r-- | gpu.c | 563 | ||||
| -rw-r--r-- | gpu.h | 45 | ||||
| -rw-r--r-- | luma.glsl | 30 | ||||
| -rw-r--r-- | main.c | 156 | ||||
| -rw-r--r-- | makefile | 39 | ||||
| -rw-r--r-- | util.h | 37 | ||||
| -rw-r--r-- | vertex.glsl | 28 |
14 files changed, 2092 insertions, 0 deletions
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If not, see <https://www.gnu.org/licenses/>. + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + <program> Copyright (C) <year> <name of author> + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +<https://www.gnu.org/licenses/>. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. 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 +<https://www.gnu.org/licenses/why-not-lgpl.html>. 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 <https://www.gnu.org/licenses/>. + */ + +#include "capture.h" + +#include <errno.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <xf86drm.h> +#include <xf86drmMode.h> + +#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 <https://www.gnu.org/licenses/>. + */ + +#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 <https://www.gnu.org/licenses/>. + */ + +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 <https://www.gnu.org/licenses/>. + */ + +#include "encode.h" + +#include <drm_fourcc.h> +#include <errno.h> +#include <libavcodec/avcodec.h> +#include <libavutil/hwcontext.h> +#include <libavutil/hwcontext_vaapi.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <va/va.h> +#include <va/va_drmcommon.h> + +#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 <https://www.gnu.org/licenses/>. + */ + +#ifndef STREAMER_ENCODE_H_ +#define STREAMER_ENCODE_H_ + +#include <stdbool.h> +#include <stdint.h> + +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_ @@ -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 <https://www.gnu.org/licenses/>. + */ + +#include "gpu.h" + +#include <EGL/egl.h> +#include <EGL/eglext.h> +#include <GLES2/gl2.h> +#include <GLES3/gl32.h> +#include <drm_fourcc.h> +#include <errno.h> +#include <stdbool.h> +#include <stddef.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +// Must be included last +#include <GLES2/gl2ext.h> + +#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; +} @@ -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 <https://www.gnu.org/licenses/>. + */ + +#ifndef STREAMER_GPU_H_ +#define STREAMER_GPU_H_ + +#include <stdbool.h> +#include <stddef.h> +#include <stdint.h> + +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 <https://www.gnu.org/licenses/>. + */ + +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); +} @@ -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 <https://www.gnu.org/licenses/>. + */ + +#include <errno.h> +#include <limits.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <unistd.h> + +#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 @@ -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 <https://www.gnu.org/licenses/>. + */ + +#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 <https://www.gnu.org/licenses/>. + */ + +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); +} |