mirror of https://github.com/odrling/Aegisub
138 lines
4.6 KiB
C++
138 lines
4.6 KiB
C++
// Copyright (c) 2009, Karl Blomster
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// -----------------------------------------------------------------------------
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//
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// AEGISUB
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//
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// Website: http://aegisub.cellosoft.com
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// Contact: mailto:zeratul@cellosoft.com
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//
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#pragma once
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#include "include/aegisub/video_provider.h"
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#include <wx/wxprec.h>
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#include <stdio.h>
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#include <vector>
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// ffmpeg uses 80, so I'm p sure this isn't too small
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#define YUV4MPEG_HEADER_MAXLEN 128
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class YUV4MPEGVideoProvider : public VideoProvider {
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private:
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enum Y4M_PixelFormat {
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Y4M_PIXFMT_NONE = -1,
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Y4M_PIXFMT_420JPEG,
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Y4M_PIXFMT_420MPEG2,
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Y4M_PIXFMT_420PALDV,
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Y4M_PIXFMT_411,
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Y4M_PIXFMT_422,
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Y4M_PIXFMT_444,
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Y4M_PIXFMT_444ALPHA,
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Y4M_PIXFMT_MONO,
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};
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enum Y4M_InterlacingMode {
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Y4M_ILACE_NOTSET = -1, // not to be confused with Y4M_ILACE_UNKNOWN
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Y4M_ILACE_PROGRESSIVE,
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Y4M_ILACE_TFF,
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Y4M_ILACE_BFF,
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Y4M_ILACE_MIXED,
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Y4M_ILACE_UNKNOWN,
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};
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// this is currently unused :(
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enum Y4M_FrameFlags {
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Y4M_FFLAG_NOTSET = -1,
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Y4M_FFLAG_NONE = 0x0000,
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// repeat field/frame flags
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Y4M_FFLAG_R_TFF = 0x0001, // TFF
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Y4M_FFLAG_R_TFF_R = 0x0002, // TFF and repeat
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Y4M_FFLAG_R_BFF = 0x0004, // BFF
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Y4M_FFLAG_R_BFF_R = 0x0008, // BFF and repeat
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Y4M_FFLAG_R_P = 0x0010, // progressive
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Y4M_FFLAG_R_P_R = 0x0020, // progressive and repeat once
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Y4M_FFLAG_R_P_RR = 0x0040, // progressive and repeat twice
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// temporal sampling flags
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Y4M_FFLAG_T_P = 0x0080, // progressive (fields sampled at the same time)
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Y4M_FFLAG_T_I = 0x0100, // interlaced (fields sampled at different times)
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// spatial sampling flags
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Y4M_FFLAG_C_P = 0x0200, // progressive (whole frame subsampled)
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Y4M_FFLAG_C_I = 0x0400, // interlaced (fields subsampled independently)
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Y4M_FFLAG_C_UNKNOWN = 0x0800, // unknown (only allowed for non-4:2:0 sampling)
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};
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FILE *sf; // source file
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bool inited;
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int w, h; // width/height
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int num_frames; // length of file in frames
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int frame_sz; // size of each frame in bytes
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Y4M_PixelFormat pixfmt; // colorspace/pixel format
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Y4M_InterlacingMode imode; // interlacing mode
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struct {
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int num;
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int den;
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} fps_rat; // framerate
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std::vector<int64_t> seek_table; // the position in the file of each frame, in bytes
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int cur_fn; // current frame number
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wxString errmsg;
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void LoadVideo(const Aegisub::String filename);
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void Close();
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void CheckFileFormat();
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void ParseFileHeader(const std::vector<wxString>& tags);
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Y4M_FrameFlags ParseFrameHeader(const std::vector<wxString>& tags);
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std::vector<wxString> ReadHeader(int64_t startpos, bool reset_pos=false);
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int IndexFile();
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public:
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YUV4MPEGVideoProvider(Aegisub::String filename, double fps);
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~YUV4MPEGVideoProvider();
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const AegiVideoFrame GetFrame(int n, int formatType);
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int GetPosition();
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int GetFrameCount();
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int GetWidth();
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int GetHeight();
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double GetFPS();
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bool AreKeyFramesLoaded() { return false; }
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wxArrayInt GetKeyFrames() { return wxArrayInt(); };
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bool IsVFR() { return false; };
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FrameRate GetTrueFrameRate() { return FrameRate(); };
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Aegisub::String GetDecoderName() { return L"YUV4MPEG"; }
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bool IsNativelyByFrames() { return true; }
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int GetDesiredCacheSize() { return 8; }
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};
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