/*****************************************************************************
* yuv_rgb.c : ARM NEONv1 YUV to RGB32 chroma conversion for VLC
*****************************************************************************
* Copyright (C) 2011 Sébastien Toque
* Rémi Denis-Courmont
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_filter.h>
#include <vlc_picture.h>
#include <vlc_chroma_probe.h>
#include <vlc_cpu.h>
#include "chroma_neon.h"
static int Open (filter_t *);
static void ProbeChroma(vlc_chroma_conv_vec *vec)
{
vlc_chroma_conv_add(vec, 0.75, VLC_CODEC_I420, VLC_CODEC_RGB565LE, false);
vlc_chroma_conv_add(vec, 0.75, VLC_CODEC_I420, VLC_CODEC_XBGR, false);
vlc_chroma_conv_add(vec, 0.75, VLC_CODEC_YV12, VLC_CODEC_XBGR, false);
vlc_chroma_conv_add(vec, 0.75, VLC_CODEC_NV21, VLC_CODEC_XBGR, false);
vlc_chroma_conv_add(vec, 0.75, VLC_CODEC_NV12, VLC_CODEC_XBGR, false);
}
vlc_module_begin ()
set_description (N_("ARM NEON video chroma YUV->RGBA"))
set_callback_video_converter(Open, 250)
add_submodule()
set_callback_chroma_conv_probe(ProbeChroma)
vlc_module_end ()
/*
static int CoefY[256];
static int CoefRV[256];
static int CoefGU[256];
static int CoefGV[256];
static int CoefBU[256];
// C reference version of the converter
static void I420_RGBA_C (filter_t *filter, picture_t *src, picture_t *dst)
{
const uint8_t *const out = dst->p->p_pixels;
const size_t width = src->p[Y_PLANE].i_visible_pitch;
const size_t height = src->p[Y_PLANE].i_visible_lines;
const int ypitch = src->p[Y_PLANE].i_pitch;
const int uvpitch = src->p[U_PLANE].i_pitch;
const int dpitch = dst->p->i_pitch / dst->p->i_pixel_pitch;
for (size_t j = 0; j < height; ++j)
{
const int y = j * ypitch;
const int u = (j>>1) * uvpitch;
const int d = j * dpitch;
for (size_t i = 0; i < width; ++i)
{
uint8_t Y = src->Y_PIXELS[y + i];
uint8_t U = src->U_PIXELS[u + (i>>1)];
uint8_t V = src->V_PIXELS[u + (i>>1)];
//coef = float * Precision + .5 (Precision=32768)
int R = CoefY[Y] + CoefRV[V];
int G = CoefY[Y] + CoefGU[U] + CoefGV[V];
int B = CoefY[Y] + CoefBU[U];
//rgb = (rgb+Precision/2) / Precision (Precision=32768)
R = R >> 15;
G = G >> 15;
B = B >> 15;
if (unlikely(R < 0)) R = 0;
if (unlikely(G < 0)) G = 0;
if (unlikely(B < 0)) B = 0;
if (unlikely(R > 255)) R = 255;
if (unlikely(G > 255)) G = 255;
if (unlikely(B > 255)) B = 255;
((uint32_t*)out)[d + i] = R | (G<<8) | (B<<16) | (0xff<<24);
}
}
}*/
static void I420_RGBA (filter_t *filter, picture_t *src, picture_t *dst)
{
struct yuv_pack out = { dst->p->p_pixels, dst->p->i_pitch };
struct yuv_planes in = { src->Y_PIXELS, src->U_PIXELS, src->V_PIXELS, src->Y_PITCH };
i420_rgb_neon (&out, &in, filter->fmt_in.video.i_visible_width, filter->fmt_in.video.i_visible_height);
}
static void I420_RV16 (filter_t *filter, picture_t *src, picture_t *dst)
{
struct yuv_pack out = { dst->p->p_pixels, dst->p->i_pitch };
struct yuv_planes in = { src->Y_PIXELS, src->U_PIXELS, src->V_PIXELS, src->Y_PITCH };
i420_rv16_neon (&out, &in, filter->fmt_in.video.i_visible_width, filter->fmt_in.video.i_visible_height);
}
static void YV12_RGBA (filter_t *filter, picture_t *src, picture_t *dst)
{
struct yuv_pack out = { dst->p->p_pixels, dst->p->i_pitch };
struct yuv_planes in = { src->Y_PIXELS, src->V_PIXELS, src->U_PIXELS, src->Y_PITCH };
i420_rgb_neon (&out, &in, filter->fmt_in.video.i_visible_width, filter->fmt_in.video.i_visible_height);
}
static void NV21_RGBA (filter_t *filter, picture_t *src, picture_t *dst)
{
struct yuv_pack out = { dst->p->p_pixels, dst->p->i_pitch };
struct yuv_planes in = { src->Y_PIXELS, src->U_PIXELS, src->V_PIXELS, src->Y_PITCH };
nv21_rgb_neon (&out, &in, filter->fmt_in.video.i_visible_width, filter->fmt_in.video.i_visible_height);
}
static void NV12_RGBA (filter_t *filter, picture_t *src, picture_t *dst)
{
struct yuv_pack out = { dst->p->p_pixels, dst->p->i_pitch };
struct yuv_planes in = { src->Y_PIXELS, src->U_PIXELS, src->V_PIXELS, src->Y_PITCH };
nv12_rgb_neon (&out, &in, filter->fmt_in.video.i_visible_width, filter->fmt_in.video.i_visible_height);
}
VIDEO_FILTER_WRAPPER (I420_RGBA)
VIDEO_FILTER_WRAPPER (I420_RV16)
VIDEO_FILTER_WRAPPER (YV12_RGBA)
VIDEO_FILTER_WRAPPER (NV21_RGBA)
VIDEO_FILTER_WRAPPER (NV12_RGBA)
static int Open (filter_t *filter)
{
if (!vlc_CPU_ARM_NEON())
return VLC_EGENERIC;
if (((filter->fmt_in.video.i_width | filter->fmt_in.video.i_height) & 1)
|| (filter->fmt_in.video.i_width != filter->fmt_out.video.i_width)
|| (filter->fmt_in.video.i_height != filter->fmt_out.video.i_height)
|| (filter->fmt_in.video.orientation != filter->fmt_out.video.orientation))
return VLC_EGENERIC;
switch (filter->fmt_out.video.i_chroma)
{
case VLC_CODEC_RGB565LE:
switch (filter->fmt_in.video.i_chroma)
{
case VLC_CODEC_I420:
filter->ops = &I420_RV16_ops;
break;
default:
return VLC_EGENERIC;
}
break;
case VLC_CODEC_XBGR:
switch (filter->fmt_in.video.i_chroma)
{
case VLC_CODEC_I420:
filter->ops = &I420_RGBA_ops;
break;
case VLC_CODEC_YV12:
filter->ops = &YV12_RGBA_ops;
break;
case VLC_CODEC_NV21:
filter->ops = &NV21_RGBA_ops;
break;
case VLC_CODEC_NV12:
filter->ops = &NV12_RGBA_ops;
break;
default:
return VLC_EGENERIC;
}
break;
default:
return VLC_EGENERIC;
}
//precompute some values for the C version
/*const int coefY = (int)(1.164 * 32768 + 0.5);
const int coefRV = (int)(1.793 * 32768 + 0.5);
const int coefGU = (int)(0.213 * 32768 + 0.5);
const int coefGV = (int)(0.533 * 32768 + 0.5);
const int coefBU = (int)(2.113 * 32768 + 0.5);
for (int i=0; i<256; ++i)
{
CoefY[i] = coefY * (i-16) + 16384;
CoefRV[i] = coefRV*(i-128);
CoefGU[i] = -coefGU*(i-128);
CoefGV[i] = -coefGV*(i-128);
CoefBU[i] = coefBU*(i-128);
}*/
msg_Dbg(filter, "%4.4s(%dx%d) to %4.4s(%dx%d)",
(char*)&filter->fmt_in.video.i_chroma, filter->fmt_in.video.i_visible_width, filter->fmt_in.video.i_visible_height,
(char*)&filter->fmt_out.video.i_chroma, filter->fmt_out.video.i_visible_width, filter->fmt_out.video.i_visible_height);
return VLC_SUCCESS;
}
¤ Dauer der Verarbeitung: 0.2 Sekunden
(vorverarbeitet am 2026-11-04)
¤
*© Formatika GbR, Deutschland
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