09c2d08c
 Hu Chunming
arm交付版
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/*
* Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "bytestream.h"
#include "internal.h"
#define CLIP(v, depth) av_clip(v, 1<<(depth-8), ((1<<depth)-(1<<(depth-8))-1))
#define WRITE_PIXELS(a, b, c, depth) \
do { \
val = CLIP(*a++, depth) << (10-depth); \
val |= (CLIP(*b++, depth) << (20-depth)) | \
(CLIP(*c++, depth) << (30-depth)); \
AV_WL32(dst, val); \
dst += 4; \
} while (0)
static void RENAME(v210_enc)(AVCodecContext *avctx,
uint8_t *dst, const AVFrame *pic)
{
V210EncContext *s = avctx->priv_data;
int aligned_width = ((avctx->width + 47) / 48) * 48;
int stride = aligned_width * 8 / 3;
int line_padding = stride - ((avctx->width * 8 + 11) / 12) * 4;
int h, w;
const TYPE *y = (const TYPE *)pic->data[0];
const TYPE *u = (const TYPE *)pic->data[1];
const TYPE *v = (const TYPE *)pic->data[2];
const int sample_size = 6 * s->RENAME(sample_factor);
const int sample_w = avctx->width / sample_size;
for (h = 0; h < avctx->height; h++) {
uint32_t val;
w = sample_w * sample_size;
s->RENAME(pack_line)(y, u, v, dst, w);
y += w;
u += w >> 1;
v += w >> 1;
dst += sample_w * 16 * s->RENAME(sample_factor);
for (; w < avctx->width - 5; w += 6) {
WRITE_PIXELS(u, y, v, DEPTH);
WRITE_PIXELS(y, u, y, DEPTH);
WRITE_PIXELS(v, y, u, DEPTH);
WRITE_PIXELS(y, v, y, DEPTH);
}
if (w < avctx->width - 1) {
WRITE_PIXELS(u, y, v, DEPTH);
val = CLIP(*y++, DEPTH) << (10-DEPTH);
if (w == avctx->width - 2) {
AV_WL32(dst, val);
dst += 4;
}
}
if (w < avctx->width - 3) {
val |= (CLIP(*u++, DEPTH) << (20-DEPTH)) | (CLIP(*y++, DEPTH) << (30-DEPTH));
AV_WL32(dst, val);
dst += 4;
val = CLIP(*v++, DEPTH) << (10-DEPTH) | (CLIP(*y++, DEPTH) << (20-DEPTH));
AV_WL32(dst, val);
dst += 4;
}
memset(dst, 0, line_padding);
dst += line_padding;
y += pic->linesize[0] / BYTES_PER_PIXEL - avctx->width;
u += pic->linesize[1] / BYTES_PER_PIXEL - avctx->width / 2;
v += pic->linesize[2] / BYTES_PER_PIXEL - avctx->width / 2;
}
}
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