git.sesse.net Git - ffmpeg/blob - libswscale/arm/swscale_unscaled.c

   1 /*
   2  * Copyright (C) 2013 Xiaolei Yu <dreifachstein@gmail.com>
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include "config.h"
  22 #include "libswscale/swscale.h"
  23 #include "libswscale/swscale_internal.h"
  24 #include "libavutil/arm/cpu.h"
  25
  26 #if 0
  27 extern void rgbx_to_nv12_neon_32(const uint8_t *src, uint8_t *y, uint8_t *chroma,
  28                 int width, int height,
  29                 int y_stride, int c_stride, int src_stride,
  30                 int32_t coeff_tbl[9]);
  31
  32 extern void rgbx_to_nv12_neon_16(const uint8_t *src, uint8_t *y, uint8_t *chroma,
  33                 int width, int height,
  34                 int y_stride, int c_stride, int src_stride,
  35                 int32_t coeff_tbl[9]);
  36
  37 static int rgbx_to_nv12_neon_32_wrapper(SwsContext *context, const uint8_t *src[],
  38                         int srcStride[], int srcSliceY, int srcSliceH,
  39                         uint8_t *dst[], int dstStride[]) {
  40
  41     rgbx_to_nv12_neon_32(src[0] + srcSliceY * srcStride[0],
  42             dst[0] + srcSliceY * dstStride[0],
  43             dst[1] + (srcSliceY / 2) * dstStride[1],
  44             context->srcW, srcSliceH,
  45             dstStride[0], dstStride[1], srcStride[0],
  46             context->input_rgb2yuv_table);
  47
  48     return 0;
  49 }
  50
  51 static int rgbx_to_nv12_neon_16_wrapper(SwsContext *context, const uint8_t *src[],
  52                         int srcStride[], int srcSliceY, int srcSliceH,
  53                         uint8_t *dst[], int dstStride[]) {
  54
  55     rgbx_to_nv12_neon_16(src[0] + srcSliceY * srcStride[0],
  56             dst[0] + srcSliceY * dstStride[0],
  57             dst[1] + (srcSliceY / 2) * dstStride[1],
  58             context->srcW, srcSliceH,
  59             dstStride[0], dstStride[1], srcStride[0],
  60             context->input_rgb2yuv_table);
  61
  62     return 0;
  63 }
  64 #endif
  65
  66 #define DECLARE_FF_NVX_TO_RGBX_FUNCS(ifmt, ofmt)                                            \
  67 int ff_##ifmt##_to_##ofmt##_neon(int w, int h,                                              \
  68                                  uint8_t *dst, int linesize,                                \
  69                                  const uint8_t *srcY, int linesizeY,                        \
  70                                  const uint8_t *srcC, int linesizeC,                        \
  71                                  const int16_t *table,                                      \
  72                                  int y_offset,                                              \
  73                                  int y_coeff);                                              \
  74                                                                                             \
  75 static int ifmt##_to_##ofmt##_neon_wrapper(SwsContext *c, const uint8_t *src[],             \
  76                                            int srcStride[], int srcSliceY, int srcSliceH,   \
  77                                            uint8_t *dst[], int dstStride[]) {               \
  78     const int16_t yuv2rgb_table[] = {                                                       \
  79         c->yuv2rgb_v2r_coeff,                                                               \
  80         c->yuv2rgb_u2g_coeff,                                                               \
  81         c->yuv2rgb_v2g_coeff,                                                               \
  82         c->yuv2rgb_u2b_coeff,                                                               \
  83     };                                                                                      \
  84                                                                                             \
  85     ff_##ifmt##_to_##ofmt##_neon(c->srcW, srcSliceH,                                        \
  86                                  dst[0] +  srcSliceY      * dstStride[0], dstStride[0],     \
  87                                  src[0] +  srcSliceY      * srcStride[0], srcStride[0],     \
  88                                  src[1] + (srcSliceY / 2) * srcStride[1], srcStride[1],     \
  89                                  yuv2rgb_table,                                             \
  90                                  c->yuv2rgb_y_offset >> 9,                                  \
  91                                  c->yuv2rgb_y_coeff);                                       \
  92                                                                                             \
  93     return 0;                                                                               \
  94 }
  95
  96 #define DECLARE_FF_NVX_TO_ALL_RGBX_FUNCS(nvx)                                               \
  97 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, argb)                                                     \
  98 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, rgba)                                                     \
  99 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, abgr)                                                     \
 100 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, bgra)                                                     \
 101
 102 DECLARE_FF_NVX_TO_ALL_RGBX_FUNCS(nv12)
 103 DECLARE_FF_NVX_TO_ALL_RGBX_FUNCS(nv21)
 104
 105 /* We need a 16 pixel width alignment. This constraint can easily be removed
 106  * for input reading but for the output which is 4-bytes per pixel (RGBA) the
 107  * assembly might be writing as much as 4*15=60 extra bytes at the end of the
 108  * line, which won't fit the 32-bytes buffer alignment. */
 109 #define SET_FF_NVX_TO_RGBX_FUNC(ifmt, IFMT, ofmt, OFMT) do {                                \
 110     if (c->srcFormat == AV_PIX_FMT_##IFMT                                                   \
 111         && c->dstFormat == AV_PIX_FMT_##OFMT                                                \
 112         && !(c->srcH & 1)                                                                   \
 113         && !(c->srcW & 15)) {                                                               \
 114         c->swscale = ifmt##_to_##ofmt##_neon_wrapper;                                       \
 115     }                                                                                       \
 116 } while (0)
 117
 118 #define SET_FF_NVX_TO_ALL_RGBX_FUNC(nvx, NVX) do {                                          \
 119     SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, argb, ARGB);                                          \
 120     SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, rgba, RGBA);                                          \
 121     SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, abgr, ABGR);                                          \
 122     SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, bgra, BGRA);                                          \
 123 } while (0)
 124
 125 static void get_unscaled_swscale_neon(SwsContext *c) {
 126 #if 0
 127     int accurate_rnd = c->flags & SWS_ACCURATE_RND;
 128     if (c->srcFormat == AV_PIX_FMT_RGBA
 129             && c->dstFormat == AV_PIX_FMT_NV12
 130             && (c->srcW >= 16)) {
 131         c->swscale = accurate_rnd ? rgbx_to_nv12_neon_32_wrapper
 132                         : rgbx_to_nv12_neon_16_wrapper;
 133     }
 134 #endif
 135
 136     SET_FF_NVX_TO_ALL_RGBX_FUNC(nv12, NV12);
 137     SET_FF_NVX_TO_ALL_RGBX_FUNC(nv21, NV21);
 138 }
 139
 140 void ff_get_unscaled_swscale_arm(SwsContext *c)
 141 {
 142     int cpu_flags = av_get_cpu_flags();
 143     if (have_neon(cpu_flags))
 144         get_unscaled_swscale_neon(c);
 145 }