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| class | VideoFrameMeter::PrintView |
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| class | VideoFrameMeter |
| | Transparent write() wrapper that measures throughput/turnaround while forwarding every call unchanged to the target given in the constructor - drop it into a pipeline slot (e.g. h264Decoder.setOutput(
meter) instead of h264Decoder.setOutput(tftOutput), with meter wrapping tftOutput) to find out how that one stage is actually performing, without instrumenting the stage itself. More...
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| class | VideoFrameSource |
| | Pull-based provider of one already-encoded video/image frame at a time - e.g. wraps a camera capture + H264Encoder/MJPEG capture pipeline. Used by VideoMuxerWithTasks's video task, which calls nextFrame() once per iteration, at the rate given by videoInfo().fps. Implementations should produce/capture the frame here directly (not defer it): a slow nextFrame() only delays whatever is pulling from it. More...
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| namespace | audio_tools |
| | Generic Implementation of sound input and output for desktop environments using portaudio.
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| enum | StreamContentType { Audio
, Video
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| | Which track write() feeds, for muxers (MuxerAVI, MuxerMP4) that double as a plain, generic Print-like sink for both tracks - see setStreamType()/streamType() on those classes. More...
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| bool | isH264KeyFrame (const uint8_t *data, size_t len) |
| | True if the given Annex-B H.264 access unit contains an IDR slice NAL unit (nal_unit_type 5) - the reliable way to tell a real keyframe/sync-sample apart from a P-frame, since nothing in the byte layout itself says so without inspecting NAL headers. Used e.g. to determine Muxer::addVideoFrame()'s isKeyFrame argument for an already-encoded VideoFormat::H264 frame.
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| bool | isMpeg1KeyFrame (const uint8_t *data, size_t len) |
| | True if the given MPEG-1/2 video access unit's picture header declares picture_coding_type == 1 (I-picture) - the MPEG equivalent of isH264KeyFrame(). Layout (ISO/IEC 11172-2): a 00 00 01 00 picture_start_code is immediately followed by temporal_reference (10 bits) then picture_coding_type (3 bits), so the type field always falls in bits 5-3 of the byte right after the 2-byte temporal_reference span (i.e. 6 bytes into the access unit, counting the start code).
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| size_t | videoFrameSizeBytes (VideoFormat format, uint16_t width, uint16_t height) |
| | Fixed per-frame size (bytes) for a raw/uncompressed VideoFormat at the given resolution - 0 for compressed formats (H264/MJPEG/MPEG4) or VideoFormat::UNKNOWN, since their frame size varies per frame.
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