Fix ffmpegsource video provider to no longer depend on ffmpeg directly, everything is now done by API calls to the ffmpegsource DLL.

Originally committed to SVN as r2340.
This commit is contained in:
Karl Blomster 2008-09-10 21:05:54 +00:00
parent d92efd1f54
commit 0026ba38ec
2 changed files with 47 additions and 64 deletions

View file

@ -51,10 +51,9 @@ FFmpegSourceVideoProvider::FFmpegSourceVideoProvider(Aegisub::String filename, d
// clean up variables
VideoSource = NULL;
SWSContext = NULL;
BufferRGB = NULL;
DstFormat = FFMS_PIX_FMT_NONE;
LastDstFormat = FFMS_PIX_FMT_NONE;
KeyFramesLoaded = false;
FrameAllocated = false;
FrameNumber = -1;
MessageSize = sizeof(FFMSErrorMessage);
@ -184,19 +183,12 @@ void FFmpegSourceVideoProvider::LoadVideo(Aegisub::String filename, double fps)
///////////////
// Close video
void FFmpegSourceVideoProvider::Close() {
if (SWSContext)
sws_freeContext(SWSContext);
SWSContext = NULL;
if (VideoSource)
FFMS_DestroyVideoSource(VideoSource);
VideoSource = NULL;
// this seems to cause a heap corruption in debug mode
/* if (FrameAllocated)
avpicture_free(&FrameRGB); */
FrameAllocated = false;
if (BufferRGB)
delete BufferRGB;
DstFormat = FFMS_PIX_FMT_NONE;
LastDstFormat = FFMS_PIX_FMT_NONE;
KeyFramesLoaded = false;
KeyFramesList.clear();
TimecodesVector.clear();
@ -228,62 +220,63 @@ const AegiVideoFrame FFmpegSourceVideoProvider::GetFrame(int _n, int FormatType)
n = GetFrameCount()-1;
// set position
FrameNumber = n;
// these are for convenience
int w = VideoInfo->Width;
int h = VideoInfo->Height;
// this is what we'll return eventually
AegiVideoFrame &DstFrame = CurFrame;
// choose output format
if (FormatType & FORMAT_RGB32) {
DstFormat = FFMS_PIX_FMT_RGB32; // FIXME: should be RGB32
DstFrame.format = FORMAT_RGB32;
} else if (FormatType & FORMAT_RGB24) {
DstFormat = FFMS_PIX_FMT_RGB24;
DstFrame.format = FORMAT_RGB24;
} else if (FormatType & FORMAT_YV12) {
DstFormat = FFMS_PIX_FMT_YUV420P; // may or may not work
DstFrame.format = FORMAT_YV12;
} else if (FormatType & FORMAT_YUY2) {
DstFormat = FFMS_PIX_FMT_YUYV422;
DstFrame.format = FORMAT_YUY2;
} else
throw _T("FFmpegSource video provider: upstream provider requested unknown or unsupported pixel format");
// requested format was changed since last time we were called, (re)set output format
if (LastDstFormat != DstFormat) {
if (FFMS_SetOutputFormat(VideoSource, DstFormat, w, h))
throw _T("FFmpegSource video provider: failed to set desired output format");
LastDstFormat = DstFormat;
}
// decode frame
const AVFrameLite *SrcFrame = FFMS_GetFrame(VideoSource, n, FFMSErrorMessage, MessageSize);
if (SrcFrame == NULL) {
ErrorMsg.Printf(_T("FFmpegSource video provider: %s"), FFMSErrorMessage);
throw ErrorMsg;
}
AVPicture *SrcPicture = reinterpret_cast<AVPicture *>(const_cast<AVFrameLite *>(SrcFrame));
// prepare stuff for conversion to RGB32
int w = VideoInfo->Width;
int h = VideoInfo->Height;
PixelFormat DstFormat;
switch (FormatType) {
case FORMAT_RGB32: DstFormat = PIX_FMT_RGB32; break;
case FORMAT_RGB24: DstFormat = PIX_FMT_RGB24; break;
case FORMAT_YV12: DstFormat = PIX_FMT_YUV420P; break; // may or may not work
case FORMAT_YUY2: DstFormat = PIX_FMT_YUYV422; break;
default: throw _T("FFmpegSource video provider: upstream provider requested unknown or unsupported pixel format");
}
if (!SWSContext) {
if (avpicture_alloc(&FrameRGB, DstFormat, w, h) != 0)
throw _T("FFmpegSource video provider: could not allocate output picture buffer");
FrameAllocated = true;
unsigned int DstSize = avpicture_get_size(DstFormat,w,h);
BufferRGB = new uint8_t[DstSize];
// initialize swscaler context
SWSContext = sws_getContext(w, h, VideoInfo->PixelFormat, w, h, DstFormat, SWS_BICUBIC, NULL, NULL, NULL);
if (SWSContext == NULL)
throw _T("FFmpegSource video provider: failed to initialize SWScale colorspace conversion");
}
avpicture_fill(&FrameRGB, BufferRGB, DstFormat, w, h);
// this is what we'll return eventually
AegiVideoFrame &DstFrame = CurFrame;
// set some properties
DstFrame.w = w;
DstFrame.h = h;
DstFrame.flipped = false;
if (FormatType == FORMAT_RGB32 || FormatType == FORMAT_RGB24) {
if (DstFrame.format == FORMAT_RGB32 || DstFrame.format == FORMAT_RGB24)
DstFrame.invertChannels = true;
} else {
else
DstFrame.invertChannels = false;
}
DstFrame.format = (VideoFrameFormat)FormatType;
// allocate destination frame
for (int i=0;i<4;i++) DstFrame.pitch[i] = FrameRGB.linesize[i];
// allocate destination
for (int i = 0; i < 4; i++)
DstFrame.pitch[i] = SrcFrame->Linesize[i];
DstFrame.Allocate();
// let swscale do the conversion to RGB and write directly to the output frame
sws_scale(SWSContext, SrcPicture->data, SrcPicture->linesize, 0, h, DstFrame.data, FrameRGB.linesize);
// copy data to destination, skipping planes with no data in them
for (int j = 0; j < 4; j++) {
if (SrcFrame->Linesize[j] > 0)
memcpy(DstFrame.data[j], SrcFrame->Data[j], DstFrame.pitch[j] * DstFrame.h);
}
return DstFrame;
}

View file

@ -37,18 +37,10 @@
// Headers
#include <wx/wxprec.h>
#ifdef WITH_FFMPEGSOURCE
#ifdef WIN32
#define EMULATE_INTTYPES
#endif /* WIN32 */
#include "include/aegisub/video_provider.h"
#include "include/aegisub/aegisub.h"
#include "dialog_progress.h"
#include "vfr.h"
extern "C" {
#include <libavformat/avformat.h>
#include <libavcodec/avcodec.h>
#include <libswscale/swscale.h>
}
#include <vector>
#include <ffms.h>
@ -60,7 +52,6 @@ class FFmpegSourceVideoProvider : public VideoProvider {
private:
VideoBase *VideoSource;
const VideoProperties *VideoInfo;
SwsContext *SWSContext;
int FrameNumber;
wxArrayInt KeyFramesList;
@ -68,9 +59,8 @@ private:
std::vector<int> TimecodesVector;
FrameRate Timecodes;
AVPicture FrameRGB;
bool FrameAllocated;
uint8_t *BufferRGB;
FFMS_PixelFormat DstFormat;
FFMS_PixelFormat LastDstFormat;
AegiVideoFrame CurFrame;
char FFMSErrorMessage[1024];