From 2b1a8f48f3a414e565cefb809f3e6a7c6aa5f8a7 Mon Sep 17 00:00:00 2001 From: Tomi Valkeinen Date: Wed, 6 Oct 2021 10:26:00 +0300 Subject: Split V4L2 code into separate libs Create v4l2++ library and pyv4l2, which are independent from the rest of the kms++. Signed-off-by: Tomi Valkeinen --- v4l2++/inc/v4l2++/helpers.h | 60 ++++ v4l2++/inc/v4l2++/pixelformats.h | 111 +++++++ v4l2++/inc/v4l2++/videodevice.h | 127 ++++++++ v4l2++/meson.build | 32 ++ v4l2++/src/helpers.cpp | 16 + v4l2++/src/pixelformats.cpp | 301 ++++++++++++++++++ v4l2++/src/videodevice.cpp | 653 +++++++++++++++++++++++++++++++++++++++ 7 files changed, 1300 insertions(+) create mode 100644 v4l2++/inc/v4l2++/helpers.h create mode 100644 v4l2++/inc/v4l2++/pixelformats.h create mode 100644 v4l2++/inc/v4l2++/videodevice.h create mode 100644 v4l2++/meson.build create mode 100644 v4l2++/src/helpers.cpp create mode 100644 v4l2++/src/pixelformats.cpp create mode 100644 v4l2++/src/videodevice.cpp (limited to 'v4l2++') diff --git a/v4l2++/inc/v4l2++/helpers.h b/v4l2++/inc/v4l2++/helpers.h new file mode 100644 index 0000000..b5c3284 --- /dev/null +++ b/v4l2++/inc/v4l2++/helpers.h @@ -0,0 +1,60 @@ +#pragma once + +#include + +#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) + +#define unlikely(x) __builtin_expect(!!(x), 0) + +/* __STRING(x) is a glibcism (i.e. not standard), which happens to also + * be available in uClibc. However, musl does not define it. Do it here. + */ +#ifndef __STRING +#define __STRING(x) #x +#endif + +#define ASSERT(x) \ + if (unlikely(!(x))) { \ + fprintf(stderr, "%s:%d: %s: ASSERT(%s) failed\n", __FILE__, __LINE__, __PRETTY_FUNCTION__, __STRING(x)); \ + abort(); \ + } + +#define FAIL(fmt, ...) \ + do { \ + fprintf(stderr, "%s:%d: %s:\n" fmt "\n", __FILE__, __LINE__, __PRETTY_FUNCTION__, ##__VA_ARGS__); \ + abort(); \ + } while (0) + +#define FAIL_IF(x, format, ...) \ + if (unlikely(x)) { \ + fprintf(stderr, "%s:%d: %s:\n" format "\n", __FILE__, __LINE__, __PRETTY_FUNCTION__, ##__VA_ARGS__); \ + abort(); \ + } + +#define EXIT(fmt, ...) \ + do { \ + fprintf(stderr, fmt "\n", ##__VA_ARGS__); \ + exit(-1); \ + } while (0) + +#define EXIT_IF(x, fmt, ...) \ + if (unlikely(x)) { \ + fprintf(stderr, fmt "\n", ##__VA_ARGS__); \ + exit(-1); \ + } + +void __my_throw(const char* file, int line, const char* funcname, const char* cond, fmt::string_view format, fmt::format_args args); + +template +void _my_throw(const char* file, int line, const char* funcname, const char* cond, const S& format, Args&&... args) +{ + __my_throw(file, line, funcname, cond, format, fmt::make_format_args(args...)); +} + +#define THROW(format, ...) \ + _my_throw(__FILE__, __LINE__, __PRETTY_FUNCTION__, nullptr, format, ##__VA_ARGS__); + +#define THROW_IF(x, format, ...) \ + if (unlikely(x)) { \ + _my_throw(__FILE__, __LINE__, __PRETTY_FUNCTION__, #x, format, ##__VA_ARGS__); \ + } diff --git a/v4l2++/inc/v4l2++/pixelformats.h b/v4l2++/inc/v4l2++/pixelformats.h new file mode 100644 index 0000000..609ff4f --- /dev/null +++ b/v4l2++/inc/v4l2++/pixelformats.h @@ -0,0 +1,111 @@ +#pragma once + +#include +#include +#include + +namespace v4l2 +{ + +constexpr uint32_t MakeFourCC(const char* fourcc) +{ + return fourcc[0] | (fourcc[1] << 8) | (fourcc[2] << 16) | (fourcc[3] << 24); +} + +enum class PixelFormat : uint32_t { + Undefined = 0, + + NV12 = MakeFourCC("NV12"), + NV21 = MakeFourCC("NV21"), + NV16 = MakeFourCC("NV16"), + NV61 = MakeFourCC("NV61"), + + YUV420 = MakeFourCC("YU12"), + YVU420 = MakeFourCC("YV12"), + YUV422 = MakeFourCC("YU16"), + YVU422 = MakeFourCC("YV16"), + YUV444 = MakeFourCC("YU24"), + YVU444 = MakeFourCC("YV24"), + + UYVY = MakeFourCC("UYVY"), + YUYV = MakeFourCC("YUYV"), + YVYU = MakeFourCC("YVYU"), + VYUY = MakeFourCC("VYUY"), + + XRGB8888 = MakeFourCC("XR24"), + XBGR8888 = MakeFourCC("XB24"), + RGBX8888 = MakeFourCC("RX24"), + BGRX8888 = MakeFourCC("BX24"), + + ARGB8888 = MakeFourCC("AR24"), + ABGR8888 = MakeFourCC("AB24"), + RGBA8888 = MakeFourCC("RA24"), + BGRA8888 = MakeFourCC("BA24"), + + RGB888 = MakeFourCC("RG24"), + BGR888 = MakeFourCC("BG24"), + + RGB332 = MakeFourCC("RGB8"), + + RGB565 = MakeFourCC("RG16"), + BGR565 = MakeFourCC("BG16"), + + XRGB4444 = MakeFourCC("XR12"), + XRGB1555 = MakeFourCC("XR15"), + + ARGB4444 = MakeFourCC("AR12"), + ARGB1555 = MakeFourCC("AR15"), + + XRGB2101010 = MakeFourCC("XR30"), + XBGR2101010 = MakeFourCC("XB30"), + RGBX1010102 = MakeFourCC("RX30"), + BGRX1010102 = MakeFourCC("BX30"), + + ARGB2101010 = MakeFourCC("AR30"), + ABGR2101010 = MakeFourCC("AB30"), + RGBA1010102 = MakeFourCC("RA30"), + BGRA1010102 = MakeFourCC("BA30"), + + SBGGR12 = MakeFourCC("BG12"), + SRGGB12 = MakeFourCC("RG12"), + + META_8 = MakeFourCC("ME08"), + META_16 = MakeFourCC("ME16"), +}; + +static inline PixelFormat FourCCToPixelFormat(const std::string& fourcc) +{ + return (PixelFormat)MakeFourCC(fourcc.c_str()); +} + +static inline std::string PixelFormatToFourCC(PixelFormat f) +{ + char buf[5] = { (char)(((uint32_t)f >> 0) & 0xff), + (char)(((uint32_t)f >> 8) & 0xff), + (char)(((uint32_t)f >> 16) & 0xff), + (char)(((uint32_t)f >> 24) & 0xff), + 0 }; + return std::string(buf); +} + +enum class PixelColorType { + RGB, + YUV, + RAW, +}; + +struct PixelFormatPlaneInfo { + uint8_t bitspp; + uint8_t xsub; + uint8_t ysub; +}; + +struct PixelFormatInfo { + PixelColorType type; + uint8_t num_planes; + struct PixelFormatPlaneInfo planes[4]; +}; + +const struct PixelFormatInfo& get_pixel_format_info(PixelFormat format); + +} // namespace kms diff --git a/v4l2++/inc/v4l2++/videodevice.h b/v4l2++/inc/v4l2++/videodevice.h new file mode 100644 index 0000000..bdb290e --- /dev/null +++ b/v4l2++/inc/v4l2++/videodevice.h @@ -0,0 +1,127 @@ +#pragma once + +#include +#include +#include +#include + +namespace v4l2 +{ + +class VideoStreamer; +class MetaStreamer; + +enum class VideoMemoryType +{ + MMAP, + DMABUF, +}; + +class VideoBuffer +{ +public: + VideoMemoryType m_mem_type; + uint32_t m_index; + uint32_t m_length; + int m_fd; + uint32_t m_offset; + PixelFormat m_format; +}; + +class VideoDevice +{ +public: + struct VideoFrameSize { + uint32_t min_w, max_w, step_w; + uint32_t min_h, max_h, step_h; + }; + + VideoDevice(const std::string& dev); + VideoDevice(int fd); + ~VideoDevice(); + + VideoDevice(const VideoDevice& other) = delete; + VideoDevice& operator=(const VideoDevice& other) = delete; + + VideoStreamer* get_capture_streamer(); + VideoStreamer* get_output_streamer(); + MetaStreamer* get_meta_capture_streamer(); + + std::vector> get_discrete_frame_sizes(PixelFormat fmt); + VideoFrameSize get_frame_sizes(PixelFormat fmt); + + int fd() const { return m_fd; } + bool has_capture() const { return m_has_capture; } + bool has_output() const { return m_has_output; } + bool has_m2m() const { return m_has_m2m; } + + static std::vector get_capture_devices(); + static std::vector get_m2m_devices(); + +private: + int m_fd; + + bool m_has_capture = false; + bool m_has_mplane_capture = false; + + bool m_has_output = false; + bool m_has_mplane_output = false; + + bool m_has_m2m = false; + bool m_has_mplane_m2m = false; + + bool m_has_meta_capture = false; + + std::unique_ptr m_capture_streamer; + std::unique_ptr m_output_streamer; + std::unique_ptr m_meta_capture_streamer; +}; + +class VideoStreamer +{ +public: + enum class StreamerType { + CaptureSingle, + CaptureMulti, + OutputSingle, + OutputMulti, + CaptureMeta, + OutputMeta, + }; + + VideoStreamer(int fd, StreamerType type); + virtual ~VideoStreamer() { } + + std::vector get_ports(); + void set_port(uint32_t index); + + std::vector get_formats(); + int get_format(PixelFormat& fmt, uint32_t& width, uint32_t& height); + void set_format(PixelFormat fmt, uint32_t width, uint32_t height); + void get_selection(uint32_t& left, uint32_t& top, uint32_t& width, uint32_t& height); + void set_selection(uint32_t& left, uint32_t& top, uint32_t& width, uint32_t& height); + void set_queue_size(uint32_t queue_size, VideoMemoryType mem_type); + void queue(VideoBuffer& fb); + VideoBuffer dequeue(); + void stream_on(); + void stream_off(); + + int fd() const { return m_fd; } + +protected: + int m_fd; + StreamerType m_type; + VideoMemoryType m_mem_type; + std::vector m_fbs; +}; + + +class MetaStreamer : public VideoStreamer +{ +public: + MetaStreamer(int fd, VideoStreamer::StreamerType type); + + void set_format(PixelFormat fmt, uint32_t size); +}; + +} diff --git a/v4l2++/meson.build b/v4l2++/meson.build new file mode 100644 index 0000000..2f425d6 --- /dev/null +++ b/v4l2++/meson.build @@ -0,0 +1,32 @@ +libv4l2xx_sources = files([ + 'src/videodevice.cpp', + 'src/pixelformats.cpp', + 'src/helpers.cpp', +]) + +public_headers = [ + 'inc/v4l2++/videodevice.h', + 'inc/v4l2++/pixelformats.h', + 'inc/v4l2++/helpers.h', +] + +private_includes = include_directories('src', 'inc') +public_includes = include_directories('inc') + +libv4l2xx_deps = [ libfmt_dep ] + +libv4l2xx = library('v4l2++', + libv4l2xx_sources, + install : true, + include_directories : [ private_includes ], + dependencies : libv4l2xx_deps, + version : meson.project_version()) + + +libv4l2xx_dep = declare_dependency(include_directories : public_includes, + link_with : libv4l2xx) + +install_headers(public_headers, subdir : 'v4l2++') + +pkg = import('pkgconfig') +pkg.generate(libv4l2xx) diff --git a/v4l2++/src/helpers.cpp b/v4l2++/src/helpers.cpp new file mode 100644 index 0000000..db80408 --- /dev/null +++ b/v4l2++/src/helpers.cpp @@ -0,0 +1,16 @@ +#include + +void __my_throw(const char* file, int line, const char *funcname, const char *cond, fmt::string_view format, fmt::format_args args) +{ + std::string str = fmt::vformat(format, args); + + fmt::print(stderr, "{}:{}: {}:\n{}", file, line, funcname, str); + if (cond) + fmt::print(stderr, " ({})\n", cond); + else + fmt::print("\n"); + + fflush(stderr); + + throw std::runtime_error(str); +} diff --git a/v4l2++/src/pixelformats.cpp b/v4l2++/src/pixelformats.cpp new file mode 100644 index 0000000..1c8453f --- /dev/null +++ b/v4l2++/src/pixelformats.cpp @@ -0,0 +1,301 @@ +#include + +#include + +using namespace std; + +namespace v4l2 +{ +static const map format_info_array = { + /* YUV packed */ + { PixelFormat::UYVY, { + PixelColorType::YUV, + 1, + { { 16, 2, 1 } }, + } }, + { PixelFormat::YUYV, { + PixelColorType::YUV, + 1, + { { 16, 2, 1 } }, + } }, + { PixelFormat::YVYU, { + PixelColorType::YUV, + 1, + { { 16, 2, 1 } }, + } }, + { PixelFormat::VYUY, { + PixelColorType::YUV, + 1, + { { 16, 2, 1 } }, + } }, + /* YUV semi-planar */ + { PixelFormat::NV12, { + PixelColorType::YUV, + 2, + { { + 8, + 1, + 1, + }, + { 8, 2, 2 } }, + } }, + { PixelFormat::NV21, { + PixelColorType::YUV, + 2, + { { + 8, + 1, + 1, + }, + { 8, 2, 2 } }, + } }, + { PixelFormat::NV16, { + PixelColorType::YUV, + 2, + { { + 8, + 1, + 1, + }, + { 8, 2, 1 } }, + } }, + { PixelFormat::NV61, { + PixelColorType::YUV, + 2, + { { + 8, + 1, + 1, + }, + { 8, 2, 1 } }, + } }, + /* YUV planar */ + { PixelFormat::YUV420, { + PixelColorType::YUV, + 3, + { { + 8, + 1, + 1, + }, + { 8, 2, 2 }, + { 8, 2, 2 } }, + } }, + { PixelFormat::YVU420, { + PixelColorType::YUV, + 3, + { { + 8, + 1, + 1, + }, + { 8, 2, 2 }, + { 8, 2, 2 } }, + } }, + { PixelFormat::YUV422, { + PixelColorType::YUV, + 3, + { { + 8, + 1, + 1, + }, + { 8, 2, 1 }, + { 8, 2, 1 } }, + } }, + { PixelFormat::YVU422, { + PixelColorType::YUV, + 3, + { { + 8, + 1, + 1, + }, + { 8, 2, 1 }, + { 8, 2, 1 } }, + } }, + { PixelFormat::YUV444, { + PixelColorType::YUV, + 3, + { { + 8, + 1, + 1, + }, + { 8, 1, 1 }, + { 8, 1, 1 } }, + } }, + { PixelFormat::YVU444, { + PixelColorType::YUV, + 3, + { { + 8, + 1, + 1, + }, + { 8, 1, 1 }, + { 8, 1, 1 } }, + } }, + /* RGB8 */ + { PixelFormat::RGB332, { + PixelColorType::RGB, + 1, + { { 8, 1, 1 } }, + } }, + /* RGB16 */ + { PixelFormat::RGB565, { + PixelColorType::RGB, + 1, + { { 16, 1, 1 } }, + } }, + { PixelFormat::BGR565, { + PixelColorType::RGB, + 1, + { { 16, 1, 1 } }, + } }, + { PixelFormat::XRGB4444, { + PixelColorType::RGB, + 1, + { { 16, 1, 1 } }, + } }, + { PixelFormat::XRGB1555, { + PixelColorType::RGB, + 1, + { { 16, 1, 1 } }, + } }, + { PixelFormat::ARGB4444, { + PixelColorType::RGB, + 1, + { { 16, 1, 1 } }, + } }, + { PixelFormat::ARGB1555, { + PixelColorType::RGB, + 1, + { { 16, 1, 1 } }, + } }, + /* RGB24 */ + { PixelFormat::RGB888, { + PixelColorType::RGB, + 1, + { { 24, 1, 1 } }, + } }, + { PixelFormat::BGR888, { + PixelColorType::RGB, + 1, + { { 24, 1, 1 } }, + } }, + /* RGB32 */ + { PixelFormat::XRGB8888, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + { PixelFormat::XBGR8888, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + { PixelFormat::RGBX8888, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + { PixelFormat::BGRX8888, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + + { PixelFormat::ARGB8888, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + { PixelFormat::ABGR8888, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + { PixelFormat::RGBA8888, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + { PixelFormat::BGRA8888, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + + { PixelFormat::XRGB2101010, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + { PixelFormat::XBGR2101010, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + { PixelFormat::RGBX1010102, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + { PixelFormat::BGRX1010102, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + + { PixelFormat::ARGB2101010, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + { PixelFormat::ABGR2101010, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + { PixelFormat::RGBA1010102, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + { PixelFormat::BGRA1010102, { + PixelColorType::RGB, + 1, + { { 32, 1, 1 } }, + } }, + { PixelFormat::SBGGR12, { + PixelColorType::RAW, + 1, + { { 16, 1, 1 } }, + } }, + { PixelFormat::SRGGB12, { + PixelColorType::RAW, + 1, + { { 16, 1, 1 } }, + } }, + { PixelFormat::META_8, { + PixelColorType::RGB, + 1, + { { 8, 1, 1 } }, + } }, + { PixelFormat::META_16, { + PixelColorType::RGB, + 1, + { { 16, 1, 1 } }, + } }, +}; + +const struct PixelFormatInfo& get_pixel_format_info(PixelFormat format) +{ + if (!format_info_array.count(format)) + throw invalid_argument("get_pixel_format_info: Unsupported pixelformat"); + + return format_info_array.at(format); +} + +} diff --git a/v4l2++/src/videodevice.cpp b/v4l2++/src/videodevice.cpp new file mode 100644 index 0000000..5ab7099 --- /dev/null +++ b/v4l2++/src/videodevice.cpp @@ -0,0 +1,653 @@ +#include + +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +using namespace std; +using namespace v4l2; + +/* + * V4L2 and DRM differ in their interpretation of YUV420::NV12 + * + * V4L2 NV12 is a Y and UV co-located planes in a single plane buffer. + * DRM NV12 is a Y and UV planes presented as dual plane buffer, + * which is known as NM12 in V4L2. + * + * Since here we have hybrid DRM/V4L2 user space helper functions + * we need to translate DRM::NV12 to V4L2:NM12 pixel format back + * and forth to keep the data view consistent. + */ + +static v4l2_memory get_mem_type(VideoMemoryType type) +{ + switch (type) { + case VideoMemoryType::MMAP: + return V4L2_MEMORY_MMAP; + case VideoMemoryType::DMABUF: + return V4L2_MEMORY_DMABUF; + default: + FAIL("Bad VideoMemoryType"); + } +} + +/* V4L2 helper funcs */ +static vector v4l2_get_formats(int fd, uint32_t buf_type) +{ + vector v; + + v4l2_fmtdesc desc{}; + desc.type = buf_type; + + while (ioctl(fd, VIDIOC_ENUM_FMT, &desc) == 0) { + if (desc.pixelformat == V4L2_PIX_FMT_NV12M) + v.push_back(PixelFormat::NV12); + else if (desc.pixelformat != V4L2_PIX_FMT_NV12) + v.push_back((PixelFormat)desc.pixelformat); + + desc.index++; + } + + return v; +} + +static int v4l2_get_format(int fd, uint32_t buf_type, PixelFormat& fmt, uint32_t& width, uint32_t& height) +{ + int r; + + v4l2_format v4lfmt{}; + + v4lfmt.type = buf_type; + r = ioctl(fd, VIDIOC_G_FMT, &v4lfmt); + ASSERT(r == 0); + + bool mplane = buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE || buf_type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; + + FAIL_IF(mplane, "mplane not supported"); + + fmt = (PixelFormat)v4lfmt.fmt.pix.pixelformat; + width = v4lfmt.fmt.pix.width; + height = v4lfmt.fmt.pix.height; + + return 0; +} + +static void v4l2_set_format(int fd, PixelFormat fmt, uint32_t width, uint32_t height, uint32_t buf_type) +{ + int r; + + v4l2_format v4lfmt{}; + + v4lfmt.type = buf_type; + r = ioctl(fd, VIDIOC_G_FMT, &v4lfmt); + ASSERT(r == 0); + + const PixelFormatInfo& pfi = get_pixel_format_info(fmt); + + bool mplane = buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE || buf_type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; + + if (mplane) { + v4l2_pix_format_mplane& mp = v4lfmt.fmt.pix_mp; + uint32_t used_fmt; + + if (fmt == PixelFormat::NV12) + used_fmt = V4L2_PIX_FMT_NV12M; + else + used_fmt = (uint32_t)fmt; + + mp.pixelformat = used_fmt; + mp.width = width; + mp.height = height; + + mp.num_planes = pfi.num_planes; + + for (unsigned i = 0; i < pfi.num_planes; ++i) { + const PixelFormatPlaneInfo& pfpi = pfi.planes[i]; + v4l2_plane_pix_format& p = mp.plane_fmt[i]; + + p.bytesperline = width * pfpi.bitspp / 8; + p.sizeimage = p.bytesperline * height / pfpi.ysub; + } + + r = ioctl(fd, VIDIOC_S_FMT, &v4lfmt); + ASSERT(r == 0); + + ASSERT(mp.pixelformat == used_fmt); + ASSERT(mp.width == width); + ASSERT(mp.height == height); + + ASSERT(mp.num_planes == pfi.num_planes); + + for (unsigned i = 0; i < pfi.num_planes; ++i) { + const PixelFormatPlaneInfo& pfpi = pfi.planes[i]; + v4l2_plane_pix_format& p = mp.plane_fmt[i]; + + ASSERT(p.bytesperline == width * pfpi.bitspp / 8); + ASSERT(p.sizeimage == p.bytesperline * height / pfpi.ysub); + } + } else { + ASSERT(pfi.num_planes == 1); + + v4lfmt.fmt.pix.pixelformat = (uint32_t)fmt; + v4lfmt.fmt.pix.width = width; + v4lfmt.fmt.pix.height = height; + v4lfmt.fmt.pix.bytesperline = width * pfi.planes[0].bitspp / 8; + v4lfmt.fmt.pix.field = V4L2_FIELD_NONE; + + r = ioctl(fd, VIDIOC_S_FMT, &v4lfmt); + ASSERT(r == 0); + + ASSERT(v4lfmt.fmt.pix.pixelformat == (uint32_t)fmt); + ASSERT(v4lfmt.fmt.pix.width == width); + ASSERT(v4lfmt.fmt.pix.height == height); + ASSERT(v4lfmt.fmt.pix.bytesperline == width * pfi.planes[0].bitspp / 8); + } +} + +static void v4l2_get_selection(int fd, uint32_t& left, uint32_t& top, uint32_t& width, uint32_t& height, uint32_t buf_type) +{ + int r; + struct v4l2_selection selection; + + if (buf_type == V4L2_BUF_TYPE_VIDEO_OUTPUT || + buf_type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { + selection.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; + selection.target = V4L2_SEL_TGT_CROP; + } else if (buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE || + buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { + selection.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + selection.target = V4L2_SEL_TGT_COMPOSE; + } else { + FAIL("buf_type (%d) is not valid\n", buf_type); + } + + r = ioctl(fd, VIDIOC_G_SELECTION, &selection); + ASSERT(r == 0); + + left = selection.r.left; + top = selection.r.top; + width = selection.r.width; + height = selection.r.height; +} + +static void v4l2_set_selection(int fd, uint32_t& left, uint32_t& top, uint32_t& width, uint32_t& height, uint32_t buf_type) +{ + int r; + struct v4l2_selection selection; + + if (buf_type == V4L2_BUF_TYPE_VIDEO_OUTPUT || + buf_type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { + selection.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; + selection.target = V4L2_SEL_TGT_CROP; + } else if (buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE || + buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { + selection.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + selection.target = V4L2_SEL_TGT_COMPOSE; + } else { + FAIL("buf_type (%d) is not valid\n", buf_type); + } + + selection.r.left = left; + selection.r.top = top; + selection.r.width = width; + selection.r.height = height; + + r = ioctl(fd, VIDIOC_S_SELECTION, &selection); + ASSERT(r == 0); + + left = selection.r.left; + top = selection.r.top; + width = selection.r.width; + height = selection.r.height; +} + +static void v4l2_request_bufs(int fd, uint32_t queue_size, uint32_t buf_type, uint32_t mem_type) +{ + v4l2_requestbuffers v4lreqbuf{}; + v4lreqbuf.type = buf_type; + v4lreqbuf.memory = mem_type; + v4lreqbuf.count = queue_size; + int r = ioctl(fd, VIDIOC_REQBUFS, &v4lreqbuf); + FAIL_IF(r != 0, "VIDIOC_REQBUFS failed: %d", errno); + ASSERT(v4lreqbuf.count == queue_size); +} + +static void v4l2_queue(int fd, VideoBuffer& fb, uint32_t buf_type) +{ + v4l2_buffer buf{}; + buf.type = buf_type; + buf.memory = get_mem_type(fb.m_mem_type); + buf.index = fb.m_index; + + bool mplane = buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE || buf_type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; + + if (mplane) { + ASSERT(false); + /* + const PixelFormatInfo& pfi = get_pixel_format_info(fb->m_format); + + buf.length = pfi.num_planes; + + v4l2_plane planes[4]{}; + buf.m.planes = planes; + + for (unsigned i = 0; i < pfi.num_planes; ++i) { + planes[i].m.fd = fb->prime_fd(i); + planes[i].bytesused = fb->size(i); + planes[i].length = fb->size(i); + } + + int r = ioctl(fd, VIDIOC_QBUF, &buf); + ASSERT(r == 0); + */ + } else { + if (fb.m_mem_type == VideoMemoryType::DMABUF) + buf.m.fd = fb.m_fd; + + int r = ioctl(fd, VIDIOC_QBUF, &buf); + ASSERT(r == 0); + } +} + +static uint32_t v4l2_dequeue(int fd, VideoBuffer& fb, uint32_t buf_type) +{ + v4l2_buffer buf{}; + buf.type = buf_type; + buf.memory = get_mem_type(fb.m_mem_type); + + // V4L2 crashes if planes are not set + v4l2_plane planes[4]{}; + buf.m.planes = planes; + buf.length = 4; + + int r = ioctl(fd, VIDIOC_DQBUF, &buf); + if (r) + throw system_error(errno, generic_category()); + + fb.m_index = buf.index; + fb.m_length = buf.length; + + if (fb.m_mem_type == VideoMemoryType::DMABUF) + fb.m_fd = buf.m.fd; + else + fb.m_offset = buf.m.offset; + + return buf.index; +} + +VideoDevice::VideoDevice(const string& dev) + : VideoDevice(::open(dev.c_str(), O_RDWR | O_NONBLOCK)) +{ +} + +VideoDevice::VideoDevice(int fd) + : m_fd(fd) +{ + if (fd < 0) + throw runtime_error("bad fd"); + + struct v4l2_capability cap = {}; + int r = ioctl(fd, VIDIOC_QUERYCAP, &cap); + ASSERT(r == 0); + + if (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE_MPLANE) { + m_has_capture = true; + m_has_mplane_capture = true; + } else if (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) { + m_has_capture = true; + m_has_mplane_capture = false; + } + + if (cap.capabilities & V4L2_CAP_VIDEO_OUTPUT_MPLANE) { + m_has_output = true; + m_has_mplane_output = true; + } else if (cap.capabilities & V4L2_CAP_VIDEO_OUTPUT) { + m_has_output = true; + m_has_mplane_output = false; + } + + if (cap.capabilities & V4L2_CAP_VIDEO_M2M_MPLANE) { + m_has_m2m = true; + m_has_capture = true; + m_has_output = true; + m_has_mplane_m2m = true; + m_has_mplane_capture = true; + m_has_mplane_output = true; + } else if (cap.capabilities & V4L2_CAP_VIDEO_M2M) { + m_has_m2m = true; + m_has_capture = true; + m_has_output = true; + m_has_mplane_m2m = false; + m_has_mplane_capture = false; + m_has_mplane_output = false; + } + + if (cap.capabilities & V4L2_CAP_META_CAPTURE) { + m_has_meta_capture = true; + } +} + +VideoDevice::~VideoDevice() +{ + ::close(m_fd); +} + +VideoStreamer* VideoDevice::get_capture_streamer() +{ + ASSERT(m_has_capture); + + if (!m_capture_streamer) { + auto type = m_has_mplane_capture ? VideoStreamer::StreamerType::CaptureMulti : VideoStreamer::StreamerType::CaptureSingle; + m_capture_streamer = std::unique_ptr(new VideoStreamer(m_fd, type)); + } + + return m_capture_streamer.get(); +} + +VideoStreamer* VideoDevice::get_output_streamer() +{ + ASSERT(m_has_output); + + if (!m_output_streamer) { + auto type = m_has_mplane_output ? VideoStreamer::StreamerType::OutputMulti : VideoStreamer::StreamerType::OutputSingle; + m_output_streamer = std::unique_ptr(new VideoStreamer(m_fd, type)); + } + + return m_output_streamer.get(); +} + +MetaStreamer* VideoDevice::get_meta_capture_streamer() +{ + ASSERT(m_has_meta_capture); + + if (!m_meta_capture_streamer) + m_meta_capture_streamer = make_unique(m_fd, MetaStreamer::StreamerType::CaptureMeta); + + return m_meta_capture_streamer.get(); +} + +vector> VideoDevice::get_discrete_frame_sizes(PixelFormat fmt) +{ + vector> v; + + v4l2_frmsizeenum v4lfrms{}; + v4lfrms.pixel_format = (uint32_t)fmt; + + int r = ioctl(m_fd, VIDIOC_ENUM_FRAMESIZES, &v4lfrms); + ASSERT(r); + + FAIL_IF(v4lfrms.type != V4L2_FRMSIZE_TYPE_DISCRETE, "No discrete frame sizes"); + + while (ioctl(m_fd, VIDIOC_ENUM_FRAMESIZES, &v4lfrms) == 0) { + v.emplace_back(v4lfrms.discrete.width, v4lfrms.discrete.height); + v4lfrms.index++; + }; + + return v; +} + +VideoDevice::VideoFrameSize VideoDevice::get_frame_sizes(PixelFormat fmt) +{ + v4l2_frmsizeenum v4lfrms{}; + v4lfrms.pixel_format = (uint32_t)fmt; + + int r = ioctl(m_fd, VIDIOC_ENUM_FRAMESIZES, &v4lfrms); + ASSERT(r); + + FAIL_IF(v4lfrms.type == V4L2_FRMSIZE_TYPE_DISCRETE, "No continuous frame sizes"); + + VideoFrameSize s; + + s.min_w = v4lfrms.stepwise.min_width; + s.max_w = v4lfrms.stepwise.max_width; + s.step_w = v4lfrms.stepwise.step_width; + + s.min_h = v4lfrms.stepwise.min_height; + s.max_h = v4lfrms.stepwise.max_height; + s.step_h = v4lfrms.stepwise.step_height; + + return s; +} + +vector VideoDevice::get_capture_devices() +{ + vector v; + + for (int i = 0; i < 20; ++i) { + string name = "/dev/video" + to_string(i); + + struct stat buffer; + if (stat(name.c_str(), &buffer) != 0) + continue; + + try { + VideoDevice vid(name); + + if (vid.has_capture() && !vid.has_m2m()) + v.push_back(name); + } catch (...) { + } + } + + return v; +} + +vector VideoDevice::get_m2m_devices() +{ + vector v; + + for (int i = 0; i < 20; ++i) { + string name = "/dev/video" + to_string(i); + + struct stat buffer; + if (stat(name.c_str(), &buffer) != 0) + continue; + + try { + VideoDevice vid(name); + + if (vid.has_m2m()) + v.push_back(name); + } catch (...) { + } + } + + return v; +} + +VideoStreamer::VideoStreamer(int fd, StreamerType type) + : m_fd(fd), m_type(type) +{ +} + +std::vector VideoStreamer::get_ports() +{ + vector v; + + switch (m_type) { + case StreamerType::CaptureSingle: + case StreamerType::CaptureMulti: { + struct v4l2_input input { + }; + + while (ioctl(m_fd, VIDIOC_ENUMINPUT, &input) == 0) { + v.push_back(string((char*)&input.name)); + input.index++; + } + + break; + } + + case StreamerType::OutputSingle: + case StreamerType::OutputMulti: { + struct v4l2_output output { + }; + + while (ioctl(m_fd, VIDIOC_ENUMOUTPUT, &output) == 0) { + v.push_back(string((char*)&output.name)); + output.index++; + } + + break; + } + + default: + FAIL("Bad StreamerType"); + } + + return v; +} + +void VideoStreamer::set_port(uint32_t index) +{ + unsigned long req; + + switch (m_type) { + case StreamerType::CaptureSingle: + case StreamerType::CaptureMulti: + req = VIDIOC_S_INPUT; + break; + + case StreamerType::OutputSingle: + case StreamerType::OutputMulti: + req = VIDIOC_S_OUTPUT; + break; + + default: + FAIL("Bad StreamerType"); + } + + int r = ioctl(m_fd, req, &index); + ASSERT(r == 0); +} + +static v4l2_buf_type get_buf_type(VideoStreamer::StreamerType type) +{ + switch (type) { + case VideoStreamer::StreamerType::CaptureSingle: + return V4L2_BUF_TYPE_VIDEO_CAPTURE; + case VideoStreamer::StreamerType::CaptureMulti: + return V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; + case VideoStreamer::StreamerType::OutputSingle: + return V4L2_BUF_TYPE_VIDEO_OUTPUT; + case VideoStreamer::StreamerType::OutputMulti: + return V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; + case MetaStreamer::StreamerType::CaptureMeta: + return V4L2_BUF_TYPE_META_CAPTURE; + case MetaStreamer::StreamerType::OutputMeta: + return (v4l2_buf_type)14; // XXX V4L2_BUF_TYPE_META_OUTPUT; + default: + FAIL("Bad StreamerType"); + } +} + +std::vector VideoStreamer::get_formats() +{ + return v4l2_get_formats(m_fd, get_buf_type(m_type)); +} + +int VideoStreamer::get_format(PixelFormat &fmt, uint32_t &width, uint32_t &height) +{ + return v4l2_get_format(m_fd, get_buf_type(m_type), fmt, width, height); +} + +void VideoStreamer::set_format(PixelFormat fmt, uint32_t width, uint32_t height) +{ + v4l2_set_format(m_fd, fmt, width, height, get_buf_type(m_type)); +} + +void VideoStreamer::get_selection(uint32_t& left, uint32_t& top, uint32_t& width, uint32_t& height) +{ + v4l2_get_selection(m_fd, left, top, width, height, get_buf_type(m_type)); +} + +void VideoStreamer::set_selection(uint32_t& left, uint32_t& top, uint32_t& width, uint32_t& height) +{ + v4l2_set_selection(m_fd, left, top, width, height, get_buf_type(m_type)); +} + +void VideoStreamer::set_queue_size(uint32_t queue_size, VideoMemoryType mem_type) +{ + m_mem_type = mem_type; + + v4l2_request_bufs(m_fd, queue_size, get_buf_type(m_type), get_mem_type(m_mem_type)); + + m_fbs.resize(queue_size); +} + +void VideoStreamer::queue(VideoBuffer &fb) +{ + uint32_t idx; + + for (idx = 0; idx < m_fbs.size(); ++idx) { + if (m_fbs[idx] == false) + break; + } + + FAIL_IF(idx == m_fbs.size(), "queue full"); + + fb.m_index = idx; + + m_fbs[idx] = true; + + v4l2_queue(m_fd, fb, get_buf_type(m_type)); +} + +VideoBuffer VideoStreamer::dequeue() +{ + VideoBuffer fb {}; + fb.m_mem_type = m_mem_type; + + uint32_t idx = v4l2_dequeue(m_fd, fb, get_buf_type(m_type)); + + m_fbs[idx] = false; + + return fb; +} + +void VideoStreamer::stream_on() +{ + uint32_t buf_type = get_buf_type(m_type); + int r = ioctl(m_fd, VIDIOC_STREAMON, &buf_type); + FAIL_IF(r, "Failed to enable stream: %d", r); +} + +void VideoStreamer::stream_off() +{ + uint32_t buf_type = get_buf_type(m_type); + int r = ioctl(m_fd, VIDIOC_STREAMOFF, &buf_type); + FAIL_IF(r, "Failed to disable stream: %d", r); +} + + + + + +MetaStreamer::MetaStreamer(int fd, StreamerType type) + : VideoStreamer(fd, type) +{ +} + +void MetaStreamer::set_format(PixelFormat fmt, uint32_t size) +{ + int r; + + v4l2_format v4lfmt {}; + + v4lfmt.type = get_buf_type(m_type); + //r = ioctl(m_fd, VIDIOC_G_FMT, &v4lfmt); + //ASSERT(r == 0); + + v4lfmt.fmt.meta.dataformat = (uint32_t)fmt; + v4lfmt.fmt.meta.buffersize = size; + + r = ioctl(m_fd, VIDIOC_S_FMT, &v4lfmt); + ASSERT(r == 0); +} -- cgit v1.2.3