VideoPixelFormatAV.hpp File Reference

Bridge between the wire-format enum VideoPixelFormat and libav's AVPixelFormat. More...

Detailed Description

Bridge between the wire-format enum VideoPixelFormat and libav's AVPixelFormat.

Why two enums exist (and why we can't just use AVPixelFormat everywhere): the SDI/HDMI capture cards carry several packed wire formats that FFmpeg does NOT model as pixel formats — it models them as codecs that decode into a planar AVPixelFormat:

v210 -> AV_CODEC_ID_V210 (decodes to yuv422p10le) — no AV_PIX_FMT_V210 v216 -> AV_CODEC_ID_V210X (yuv422p16) — no AV_PIX_FMT r210/RGB10-> AV_CODEC_ID_R210/R10K (gbrp10/rgb48) — no exact AV_PIX_FMT DPX 10/12 -> AV_CODEC_ID_DPX — no AV_PIX_FMT 12-bit packed RGB, A2-ARGB10 — no AV_PIX_FMT

Those are exactly the formats capture cards put on the wire, so a wire-format enum is unavoidable. But the buffer formats (planar/semi-planar YUV, packed 8-bit RGB, 16-bit RGB, grey) all have AVPixelFormat twins; this bridge maps them so:

• the capture path can derive a VideoPixelFormat from the Video::ImageFormat::pixel_format (an AVPixelFormat) it already carries;
• vendor format tables can interop with the libav-based decoder/encoder paths for the representable subset, with a single source of truth for the overlap instead of each site re-deriving it.

toAVPixelFormat returns AV_PIX_FMT_NONE for the wire-only formats (the caller keeps using VideoPixelFormat for those). fromAVPixelFormat returns VideoPixelFormat::Unknown for AVPixelFormats with no wire-format equivalent.

Go to the source code of this file.

Namespaces
namespace	score
	Base toolkit upon which the software is built.
namespace	score::gfx
	Graphics rendering pipeline for ossia score.

Functions
AVPixelFormat	score::gfx::interop::toAVPixelFormat (VideoPixelFormat f) noexcept
VideoPixelFormat	score::gfx::interop::fromAVPixelFormat (AVPixelFormat f) noexcept

Function Documentation

fromAVPixelFormat()

VideoPixelFormat score::gfx::interop::fromAVPixelFormat ( AVPixelFormat  f )

noexcept

Map an AVPixelFormat back to a wire format, or VideoPixelFormat::Unknown if it isn't one of the capture-card wire formats.

toAVPixelFormat()

AVPixelFormat score::gfx::interop::toAVPixelFormat ( VideoPixelFormat  f )

noexcept

Map a wire format to its byte-identical AVPixelFormat, or AV_PIX_FMT_NONE if FFmpeg has no pixel-format for it (v210/v216/DPX/r210/12-bit-packed/A2-ARGB10 — those are codecs in FFmpeg, not pixel formats).