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