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39
40#include "qvideoframeconversionhelper_p.h"
41
42#ifdef QT_COMPILER_SUPPORTS_SSE2
43
44QT_BEGIN_NAMESPACE
45
46void QT_FASTCALL qt_convert_BGRA32_to_ARGB32_sse2(const QVideoFrame &frame, uchar *output)
47{
48 FETCH_INFO_PACKED(frame)
49 MERGE_LOOPS(width, height, stride, 4)
50 quint32 *argb = reinterpret_cast<quint32*>(output);
51
52 const __m128i zero = _mm_setzero_si128();
53
54 for (int y = 0; y < height; ++y) {
55 const quint32 *bgra = reinterpret_cast<const quint32*>(src);
56
57 int x = 0;
58 ALIGN(16, argb, x, width) {
59 *argb = qConvertBGRA32ToARGB32(bgra: *bgra);
60 ++bgra;
61 ++argb;
62 }
63
64 for (; x < width - 3; x += 4) {
65 __m128i pixelData = _mm_loadu_si128(p: reinterpret_cast<const __m128i*>(bgra));
66 bgra += 4;
67 __m128i gaComponents = _mm_unpacklo_epi8(a: pixelData, b: zero);
68 __m128i brComponents = _mm_unpackhi_epi8(a: pixelData, b: zero);
69 gaComponents = _mm_shufflelo_epi16(_mm_shufflehi_epi16(gaComponents, _MM_SHUFFLE(0, 1, 2, 3)), _MM_SHUFFLE(0, 1, 2, 3)); // swap GA
70 brComponents = _mm_shufflelo_epi16(_mm_shufflehi_epi16(brComponents, _MM_SHUFFLE(0, 1, 2, 3)), _MM_SHUFFLE(0, 1, 2, 3)); // swap BR
71 pixelData = _mm_packus_epi16(a: gaComponents, b: brComponents);
72 _mm_store_si128(p: reinterpret_cast<__m128i*>(argb), b: pixelData);
73 argb += 4;
74 }
75
76 // leftovers
77 for (; x < width; ++x) {
78 *argb = qConvertBGRA32ToARGB32(bgra: *bgra);
79 ++bgra;
80 ++argb;
81 }
82
83 src += stride;
84 }
85}
86
87QT_END_NAMESPACE
88
89#endif
90

source code of qtmultimedia/src/multimedia/video/qvideoframeconversionhelper_sse2.cpp