mirror of
https://github.com/FFmpeg/FFmpeg.git
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91 lines
3.3 KiB
C
91 lines
3.3 KiB
C
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/*
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* Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
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* Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "bytestream.h"
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#include "internal.h"
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#define CLIP(v, depth) av_clip(v, 1<<(depth-8), ((1<<depth)-(1<<(depth-8))-1))
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#define WRITE_PIXELS(a, b, c, depth) \
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do { \
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val = CLIP(*a++, depth) << (10-depth); \
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val |= (CLIP(*b++, depth) << (20-depth)) | \
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(CLIP(*c++, depth) << (30-depth)); \
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AV_WL32(dst, val); \
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dst += 4; \
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} while (0)
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static void RENAME(v210_enc)(AVCodecContext *avctx,
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uint8_t *dst, const AVFrame *pic)
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{
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V210EncContext *s = avctx->priv_data;
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int aligned_width = ((avctx->width + 47) / 48) * 48;
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int stride = aligned_width * 8 / 3;
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int line_padding = stride - ((avctx->width * 8 + 11) / 12) * 4;
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int h, w;
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const TYPE *y = (const TYPE *)pic->data[0];
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const TYPE *u = (const TYPE *)pic->data[1];
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const TYPE *v = (const TYPE *)pic->data[2];
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const int sample_size = 6 * s->RENAME(sample_factor);
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const int sample_w = avctx->width / sample_size;
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for (h = 0; h < avctx->height; h++) {
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uint32_t val;
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w = sample_w * sample_size;
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s->RENAME(pack_line)(y, u, v, dst, w);
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y += w;
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u += w >> 1;
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v += w >> 1;
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dst += sample_w * 16 * s->RENAME(sample_factor);
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for (; w < avctx->width - 5; w += 6) {
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WRITE_PIXELS(u, y, v, DEPTH);
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WRITE_PIXELS(y, u, y, DEPTH);
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WRITE_PIXELS(v, y, u, DEPTH);
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WRITE_PIXELS(y, v, y, DEPTH);
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}
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if (w < avctx->width - 1) {
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WRITE_PIXELS(u, y, v, DEPTH);
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val = CLIP(*y++, DEPTH) << (10-DEPTH);
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if (w == avctx->width - 2) {
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AV_WL32(dst, val);
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dst += 4;
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}
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}
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if (w < avctx->width - 3) {
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val |= (CLIP(*u++, DEPTH) << (20-DEPTH)) | (CLIP(*y++, DEPTH) << (30-DEPTH));
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AV_WL32(dst, val);
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dst += 4;
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val = CLIP(*v++, DEPTH) << (10-DEPTH) | (CLIP(*y++, DEPTH) << (20-DEPTH));
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AV_WL32(dst, val);
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dst += 4;
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}
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memset(dst, 0, line_padding);
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dst += line_padding;
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y += pic->linesize[0] / BYTES_PER_PIXEL - avctx->width;
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u += pic->linesize[1] / BYTES_PER_PIXEL - avctx->width / 2;
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v += pic->linesize[2] / BYTES_PER_PIXEL - avctx->width / 2;
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}
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}
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