mirror of
https://github.com/FFmpeg/FFmpeg.git
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130 lines
4.0 KiB
C
130 lines
4.0 KiB
C
/*
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* V210 encoder
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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 Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "avcodec.h"
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#include "bytestream.h"
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static av_cold int encode_init(AVCodecContext *avctx)
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{
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if (avctx->width & 1) {
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av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
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return -1;
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}
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if (avctx->pix_fmt != PIX_FMT_YUV422P16) {
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av_log(avctx, AV_LOG_ERROR, "v210 needs YUV422P16\n");
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return -1;
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}
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if (avctx->bits_per_raw_sample != 10)
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av_log(avctx, AV_LOG_WARNING, "bits per raw sample: %d != 10-bit\n",
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avctx->bits_per_raw_sample);
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avctx->coded_frame = avcodec_alloc_frame();
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avctx->coded_frame->key_frame = 1;
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avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
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return 0;
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}
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static int encode_frame(AVCodecContext *avctx, unsigned char *buf,
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int buf_size, void *data)
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{
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const AVFrame *pic = 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 h, w;
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const uint16_t *y = (const uint16_t*)pic->data[0];
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const uint16_t *u = (const uint16_t*)pic->data[1];
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const uint16_t *v = (const uint16_t*)pic->data[2];
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uint8_t *p = buf;
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uint8_t *pdst = buf;
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if (buf_size < aligned_width * avctx->height * 8 / 3) {
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av_log(avctx, AV_LOG_ERROR, "output buffer too small\n");
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return -1;
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}
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#define WRITE_PIXELS(a, b, c) \
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do { \
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val = (*a++ >> 6) | \
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((*b++ & 0xFFC0) << 4); \
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val|= (*c++ & 0xFFC0) << 14; \
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bytestream_put_le32(&p, val); \
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} while (0)
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for (h = 0; h < avctx->height; h++) {
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uint32_t val;
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for (w = 0; w < avctx->width - 5; w += 6) {
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WRITE_PIXELS(u, y, v);
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WRITE_PIXELS(y, u, y);
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WRITE_PIXELS(v, y, u);
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WRITE_PIXELS(y, v, y);
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}
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if (w < avctx->width - 1) {
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WRITE_PIXELS(u, y, v);
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val = *y++ >> 6;
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if (w == avctx->width - 2)
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bytestream_put_le32(&p, val);
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}
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if (w < avctx->width - 3) {
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val |=((*u++ & 0xFFC0) << 4) |
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((*y++ & 0xFFC0) << 14);
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bytestream_put_le32(&p, val);
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val = (*v++ >> 6) |
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(*y++ & 0xFFC0) << 4;
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bytestream_put_le32(&p, val);
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}
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pdst += stride;
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memset(p, 0, pdst - p);
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p = pdst;
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y += pic->linesize[0] / 2 - avctx->width;
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u += pic->linesize[1] / 2 - avctx->width / 2;
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v += pic->linesize[2] / 2 - avctx->width / 2;
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}
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return p - buf;
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}
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static av_cold int encode_close(AVCodecContext *avctx)
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{
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av_freep(&avctx->coded_frame);
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return 0;
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}
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AVCodec ff_v210_encoder = {
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.name = "v210",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = CODEC_ID_V210,
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.init = encode_init,
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.encode = encode_frame,
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.close = encode_close,
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.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV422P16, PIX_FMT_NONE},
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.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
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};
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