Stu Leak
68df790d27
Major improvements to UnifiedPlayer: 1. GetFrameImage() now works when paused for responsive UI updates 2. Play() method properly starts FFmpeg process 3. Frame display loop runs continuously for smooth video display 4. Disabled audio temporarily to fix video playback fundamentals 5. Simplified FFmpeg command to focus on video stream only Player now: - Generates video frames correctly - Shows video when paused - Has responsive progress tracking - Starts playback properly Next steps: Re-enable audio playback once video is stable
59 lines
1.1 KiB
Go
59 lines
1.1 KiB
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package tiff
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import (
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"bufio"
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"io"
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)
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type byteReader interface {
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io.Reader
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io.ByteReader
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}
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// unpackBits decodes the PackBits-compressed data in src and returns the
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// uncompressed data.
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//
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// The PackBits compression format is described in section 9 (p. 42)
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// of the TIFF spec.
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func unpackBits(r io.Reader) ([]byte, error) {
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buf := make([]byte, 128)
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dst := make([]byte, 0, 1024)
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br, ok := r.(byteReader)
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if !ok {
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br = bufio.NewReader(r)
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}
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for {
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b, err := br.ReadByte()
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if err != nil {
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if err == io.EOF {
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return dst, nil
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}
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return nil, err
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}
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code := int(int8(b))
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switch {
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case code >= 0:
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n, err := io.ReadFull(br, buf[:code+1])
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if err != nil {
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return nil, err
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}
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dst = append(dst, buf[:n]...)
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case code == -128:
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// No-op.
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default:
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if b, err = br.ReadByte(); err != nil {
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return nil, err
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}
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for j := 0; j < 1-code; j++ {
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buf[j] = b
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}
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dst = append(dst, buf[:1-code]...)
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}
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}
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}
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