forked from mia/Aegisub
99 lines
No EOL
4.2 KiB
C++
99 lines
No EOL
4.2 KiB
C++
// Copyright (c) 2008 Fredrik Mellbin
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
// THE SOFTWARE.
|
|
|
|
#include "ffmpegsource.h"
|
|
|
|
SWScale::SWScale(PClip AChild, int AResizeToWidth, int AResizeToHeight, const char *AResizer, const char *AConvertToFormat, IScriptEnvironment *Env) : GenericVideoFilter(AChild) {
|
|
Context = NULL;
|
|
OrigWidth = vi.width;
|
|
OrigHeight = vi.height;
|
|
FlipOutput = vi.IsYUV();
|
|
|
|
int ConvertFromFormat = PIX_FMT_NONE;
|
|
if (vi.IsYV12())
|
|
ConvertFromFormat = PIX_FMT_YUV420P;
|
|
if (vi.IsYUY2())
|
|
ConvertFromFormat = PIX_FMT_YUYV422;
|
|
if (vi.IsRGB24())
|
|
ConvertFromFormat = PIX_FMT_BGR24;
|
|
if (vi.IsRGB32())
|
|
ConvertFromFormat = PIX_FMT_RGB32;
|
|
|
|
if (AResizeToHeight <= 0)
|
|
AResizeToHeight = OrigHeight;
|
|
else
|
|
vi.height = AResizeToHeight;
|
|
|
|
if (AResizeToWidth <= 0)
|
|
AResizeToWidth = OrigWidth;
|
|
else
|
|
vi.width = AResizeToWidth;
|
|
|
|
int ConvertToFormat = CSNameToPIXFMT(AConvertToFormat, ConvertFromFormat);
|
|
if (ConvertToFormat == PIX_FMT_NONE)
|
|
Env->ThrowError("SWScale: Invalid colorspace specified (%s)", AConvertToFormat);
|
|
|
|
switch (ConvertToFormat) {
|
|
case PIX_FMT_YUV420P: vi.pixel_type = VideoInfo::CS_I420; break;
|
|
case PIX_FMT_YUYV422: vi.pixel_type = VideoInfo::CS_YUY2; break;
|
|
case PIX_FMT_BGR24: vi.pixel_type = VideoInfo::CS_BGR24; break;
|
|
case PIX_FMT_RGB32: vi.pixel_type = VideoInfo::CS_BGR32; break;
|
|
}
|
|
|
|
FlipOutput ^= vi.IsYUV();
|
|
|
|
int Resizer = ResizerNameToSWSResizer(AResizer);
|
|
if (Resizer == 0)
|
|
Env->ThrowError("SWScale: Invalid resizer specified (%s)", AResizer);
|
|
|
|
if (ConvertToFormat == PIX_FMT_YUV420P && vi.height & 1)
|
|
Env->ThrowError("SWScale: mod 2 output height required", AResizer);
|
|
|
|
if ((ConvertToFormat == PIX_FMT_YUV420P || ConvertToFormat == PIX_FMT_YUYV422) && vi.width & 1)
|
|
Env->ThrowError("SWScale: mod 2 output width required", AResizer);
|
|
|
|
// may one day need a SWS_CS_DEFAULT in flags
|
|
Context = sws_getContext(OrigWidth, OrigHeight, ConvertFromFormat, vi.width, vi.height, ConvertToFormat, GetSWSCPUFlags(Env) | Resizer, NULL, NULL, NULL);
|
|
}
|
|
|
|
SWScale::~SWScale() {
|
|
if (Context)
|
|
sws_freeContext(Context);
|
|
}
|
|
|
|
PVideoFrame SWScale::GetFrame(int n, IScriptEnvironment *Env) {
|
|
PVideoFrame Src = child->GetFrame(n, Env);
|
|
PVideoFrame Dst = Env->NewVideoFrame(vi);
|
|
|
|
uint8_t *SrcData[3] = {(uint8_t *)Src->GetReadPtr(PLANAR_Y), (uint8_t *)Src->GetReadPtr(PLANAR_U), (uint8_t *)Src->GetReadPtr(PLANAR_V)};
|
|
int SrcStride[3] = {Src->GetPitch(PLANAR_Y), Src->GetPitch(PLANAR_U), Src->GetPitch(PLANAR_V)};
|
|
|
|
if (FlipOutput) {
|
|
uint8_t *DstData[3] = {Dst->GetWritePtr(PLANAR_Y) + Dst->GetPitch(PLANAR_Y) * (Dst->GetHeight(PLANAR_Y) - 1), Dst->GetWritePtr(PLANAR_U) + Dst->GetPitch(PLANAR_U) * (Dst->GetHeight(PLANAR_U) - 1), Dst->GetWritePtr(PLANAR_V) + Dst->GetPitch(PLANAR_V) * (Dst->GetHeight(PLANAR_V) - 1)};
|
|
int DstStride[3] = {-Dst->GetPitch(PLANAR_Y), -Dst->GetPitch(PLANAR_U), -Dst->GetPitch(PLANAR_V)};
|
|
sws_scale(Context, SrcData, SrcStride, 0, OrigHeight, DstData, DstStride);
|
|
} else {
|
|
uint8_t *DstData[3] = {Dst->GetWritePtr(PLANAR_Y), Dst->GetWritePtr(PLANAR_U), Dst->GetWritePtr(PLANAR_V)};
|
|
int DstStride[3] = {Dst->GetPitch(PLANAR_Y), Dst->GetPitch(PLANAR_U), Dst->GetPitch(PLANAR_V)};
|
|
sws_scale(Context, SrcData, SrcStride, 0, OrigHeight, DstData, DstStride);
|
|
}
|
|
|
|
return Dst;
|
|
} |