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Aegisub
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Add support for externally controlled frame data to AegiVideoFrame, and take advantage of this in the FFMS2 video provider to eliminate a copy of the frame data. Net speedup for seeking from beginning to end of several test files is 10-20%. 

Originally committed to SVN as r3729.
This commit is contained in:
Thomas Goyne 2009-10-24 02:07:56 +00:00
parent c4d07cb525
commit 4fc2b90399
6 changed files with 63 additions and 99 deletions
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119
aegisub/src/video_frame.cpp
View File

@ -34,21 +34,17 @@
/// @ingroup video
///
///////////
// Headers
#include "config.h"
#include "utils.h"
#include "video_frame.h"
/// @brief Reset
/// @brief Reset values to the defaults
///
/// Note that this function DOES NOT unallocate memory.
/// Use Clear() for that
void AegiVideoFrame::Reset() {
// Note that this function DOES NOT unallocate memory.
// Use Clear() for that
// Zero variables
for (int i=0;i<4;i++) {
data[i] = NULL;
@ -62,25 +58,19 @@ void AegiVideoFrame::Reset() {
format = FORMAT_NONE;
flipped = false;
invertChannels = true;
ownMem = true;
}
/// @brief Constructor
///
AegiVideoFrame::AegiVideoFrame() {
Reset();
}
/// @brief Create default
/// @brief Create a solid black frame of the request size and format
/// @param width
/// @param height
/// @param fmt
///
AegiVideoFrame::AegiVideoFrame(int width,int height,VideoFrameFormat fmt) {
// Clear
Reset();
// Set format
@ -93,7 +83,6 @@ AegiVideoFrame::AegiVideoFrame(int width,int height,VideoFrameFormat fmt) {
pitch[2] = w/2;
}
// Allocate
Allocate();
// Clear data
@ -101,12 +90,9 @@ AegiVideoFrame::AegiVideoFrame(int width,int height,VideoFrameFormat fmt) {
memset(data[0],0,size);
}
/// @brief Allocate
///
/// @brief Allocate memory if needed
void AegiVideoFrame::Allocate() {
// Check consistency
// Check for sanity
wxASSERT(pitch[0] > 0 && pitch[0] < 10000);
wxASSERT(w > 0 && w < 10000);
wxASSERT(h > 0 && h < 10000);
@ -123,8 +109,8 @@ void AegiVideoFrame::Allocate() {
else size = pitch[0] * height;
// Reallocate, if necessary
if (memSize != size) {
if (data[0]) {
if (memSize != size || !ownMem) {
if (data[0] && ownMem) {
delete[] data[0];
}
data[0] = new unsigned char[size];
@ -137,32 +123,19 @@ void AegiVideoFrame::Allocate() {
data[2] = data[0] + (pitch[0]*height+pitch[1]*height/2);
}
}
ownMem = true;
}
/// @brief Clear
void AegiVideoFrame::Clear() {
delete[] data[0];
if (ownMem) delete[] data[0];
// Zero variables
for (int i=0;i<4;i++) {
data[i] = NULL;
pitch[i] = 0;
}
memSize = 0;
w = 0;
h = 0;
// Reset properties
format = FORMAT_NONE;
flipped = false;
invertChannels = true;
Reset();
}
/// @brief Create copy
/// @param source
///
/// @brief Copy from an AegiVideoFrame
/// @param source The frame to copy from
void AegiVideoFrame::CopyFrom(const AegiVideoFrame &source) {
w = source.w;
h = source.h;
@ -174,20 +147,40 @@ void AegiVideoFrame::CopyFrom(const AegiVideoFrame &source) {
invertChannels = source.invertChannels;
}
/// @brief Set the frame to an externally allocated block of memory
/// @param source Target frame data
/// @param width The frame width in pixels
/// @param height The frame height in pixels
/// @param pitch The frame's pitch
/// @param format The fram'e format
void AegiVideoFrame::SetTo(const unsigned char *const source[], int width, int height, const int pitch[4], VideoFrameFormat format) {
wxASSERT(pitch[0] > 0 && pitch[0] < 10000);
wxASSERT(width > 0 && width < 10000);
wxASSERT(height > 0 && height < 10000);
wxASSERT(format != FORMAT_NONE);
ownMem = false;
w = width;
h = height;
this->format = format;
for (int i = 0; i < 4; i++) {
// Note that despite this cast, the contents of data should still never be modified
data[i] = const_cast<unsigned char*>(source[i]);
this->pitch[i] = pitch[i];
}
}
/// @brief This function is only used on screenshots, so it doesn't have to be fast ------ Get wxImage
/// @return
///
wxImage AegiVideoFrame::GetImage() const {
// RGB
if (format == FORMAT_RGB32 || format == FORMAT_RGB24) {
// Create
unsigned char *buf = (unsigned char*)malloc(w*h*3);
const unsigned char *src = data[0];
unsigned char *dst = buf;
// Bytes per pixel
int Bpp = GetBpp();
// Convert
@ -208,18 +201,11 @@ wxImage AegiVideoFrame::GetImage() const {
img.SetData(buf);
return img;
}
// YV12
else if (format == FORMAT_YV12) {
AegiVideoFrame temp;
temp.w = w;
temp.h = h;
temp.pitch[0] = w*4;
temp.format = FORMAT_RGB32;
temp.ConvertFrom(*this);
return temp.GetImage();
AegiVideoFrame temp;
temp.ConvertFrom(*this);
return temp.GetImage();
}
else {
return wxImage(w,h);
}
@ -240,19 +226,18 @@ int AegiVideoFrame::GetBpp(int plane) const {
}
}
/// @brief Convert from another frame
/// @param source
///
void AegiVideoFrame::ConvertFrom(const AegiVideoFrame &source) {
// Ensure compatibility
if (w != source.w) throw _T("AegiVideoFrame::ConvertFrom: Widths don't match.");
if (h != source.h) throw _T("AegiVideoFrame::ConvertFrom: Heights don't match.");
if (format != FORMAT_RGB32) throw _T("AegiVideoFrame::ConvertFrom: Unsupported destination format.");
if (source.format != FORMAT_YV12) throw _T("AegiVideoFrame::ConvertFrom: Unsupported source format.");
/// @param source The frame to convert from
/// @param newFormat The format to convert to
void AegiVideoFrame::ConvertFrom(const AegiVideoFrame &source, VideoFrameFormat newFormat) {
if (newFormat != FORMAT_RGB32) throw _T("AegiVideoFrame::ConvertFrom: Unsupported destination format.");
if (source.format != FORMAT_YV12) throw _T("AegiVideoFrame::ConvertFrom: Unsupported source format.");
w = source.w;
h = source.h;
format = newFormat;
pitch[0] = w * 4;
// Allocate
Allocate();
// Set up pointers
@ -297,5 +282,3 @@ void AegiVideoFrame::ConvertFrom(const AegiVideoFrame &source) {
}
}
}

12
aegisub/src/video_frame.h
View File

@ -77,12 +77,13 @@ enum VideoFrameFormat {
/// DOCME
class AegiVideoFrame {
private:
/// DOCME
unsigned int memSize;
unsigned int memSize; /// The size in bytes of the frame buffer
/// Whether the object owns its buffer. If this is false, **data should never be modified
bool ownMem;
void Reset();
public:
void Allocate();
/// Pointers to the data planes. Interleaved formats only use data[0]
unsigned char *data[4];
@ -108,10 +109,11 @@ public:
AegiVideoFrame();
AegiVideoFrame(int width,int height,VideoFrameFormat format=FORMAT_RGB32);
void Allocate();
void Clear();
void CopyFrom(const AegiVideoFrame &source);
void ConvertFrom(const AegiVideoFrame &source);
void ConvertFrom(const AegiVideoFrame &source, VideoFrameFormat newFormat=FORMAT_RGB32);
void SetTo(const unsigned char *const source[], int width, int height, const int pitch[4], VideoFrameFormat format);
wxImage GetImage() const;
int GetBpp(int plane=0) const;

2
aegisub/src/video_out_gl.cpp
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@ -259,7 +259,7 @@ void VideoOutGL::InitTextures(int width, int height, GLenum format, int bpp) {
frameFormat = format;
}
void VideoOutGL::DisplayFrame(AegiVideoFrame frame, int frameNumber, int sw, int sh) {
void VideoOutGL::DisplayFrame(const AegiVideoFrame& frame, int frameNumber, int sw, int sh) {
if (frame.h == 0 || frame.w == 0) return;
if (frameNumber == -1) frameNumber = lastFrame;

2
aegisub/src/video_out_gl.h
View File

@ -88,7 +88,7 @@ public:
/// @param frameNumber The frame number of the frame to be displayed
/// @param sw The current script width
/// @param sh The current script height
void DisplayFrame(AegiVideoFrame frame, int frameNumber, int sw, int sh);
void DisplayFrame(const AegiVideoFrame& frame, int frameNumber, int sw, int sh);
/// @brief Force the redisplay of the frame the next time DisplayFrame is called even if the frame number has not changed
void InvalidateFrame() { lastFrame = -1; }

21
aegisub/src/video_provider_ffmpegsource.cpp
View File

@ -312,9 +312,6 @@ const AegiVideoFrame FFmpegSourceVideoProvider::GetFrame(int _n) {
// set position
FrameNumber = n;
// this is what we'll return eventually
AegiVideoFrame &DstFrame = CurFrame;
// decode frame
const FFMS_Frame *SrcFrame = FFMS_GetFrame(VideoSource, n, &ErrInfo);
if (SrcFrame == NULL) {
@ -322,22 +319,8 @@ const AegiVideoFrame FFmpegSourceVideoProvider::GetFrame(int _n) {
throw ErrorMsg;
}
// set some properties
DstFrame.format = FORMAT_RGB32;
DstFrame.w = Width;
DstFrame.h = Height;
DstFrame.flipped = false;
DstFrame.invertChannels = true;
// allocate destination
for (int i = 0; i < 4; i++)
DstFrame.pitch[i] = SrcFrame->Linesize[i];
DstFrame.Allocate();
// copy data to destination
memcpy(DstFrame.data[0], SrcFrame->Data[0], DstFrame.pitch[0] * DstFrame.h);
return DstFrame;
CurFrame.SetTo(SrcFrame->Data, Width, Height, SrcFrame->Linesize, FORMAT_RGB32);
return CurFrame;
}

6
aegisub/src/video_provider_yuv4mpeg.cpp
View File

@ -421,12 +421,8 @@ const AegiVideoFrame YUV4MPEGVideoProvider::GetFrame(int n) {
}
AegiVideoFrame dst_frame;
dst_frame.format = dst_fmt;
dst_frame.w = w;
dst_frame.h = h;
dst_frame.invertChannels = true;
dst_frame.pitch[0] = w * 4;
dst_frame.ConvertFrom(tmp_frame);
dst_frame.ConvertFrom(tmp_frame, dst_fmt);
tmp_frame.Clear();