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91 lines
2.7 KiB
91 lines
2.7 KiB
/* |
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* libquicktime yuv4 encoder |
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* |
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* Copyright (c) 2011 Carl Eugen Hoyos |
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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 "avcodec.h" |
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#include "internal.h" |
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static av_cold int yuv4_encode_init(AVCodecContext *avctx) |
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{ |
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avctx->coded_frame = avcodec_alloc_frame(); |
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if (!avctx->coded_frame) { |
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av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n"); |
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return AVERROR(ENOMEM); |
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} |
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return 0; |
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} |
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static int yuv4_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
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const AVFrame *pic, int *got_packet) |
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{ |
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uint8_t *dst; |
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uint8_t *y, *u, *v; |
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int i, j, ret; |
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if ((ret = ff_alloc_packet2(avctx, pkt, 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1))) < 0) |
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return ret; |
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dst = pkt->data; |
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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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y = pic->data[0]; |
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u = pic->data[1]; |
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v = pic->data[2]; |
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for (i = 0; i < avctx->height + 1 >> 1; i++) { |
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for (j = 0; j < avctx->width + 1 >> 1; j++) { |
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*dst++ = u[j] ^ 0x80; |
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*dst++ = v[j] ^ 0x80; |
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*dst++ = y[ 2 * j ]; |
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*dst++ = y[ 2 * j + 1]; |
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*dst++ = y[pic->linesize[0] + 2 * j ]; |
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*dst++ = y[pic->linesize[0] + 2 * j + 1]; |
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} |
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y += 2 * pic->linesize[0]; |
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u += pic->linesize[1]; |
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v += pic->linesize[2]; |
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} |
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pkt->flags |= AV_PKT_FLAG_KEY; |
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*got_packet = 1; |
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return 0; |
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} |
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static av_cold int yuv4_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_yuv4_encoder = { |
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.name = "yuv4", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_YUV4, |
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.init = yuv4_encode_init, |
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.encode2 = yuv4_encode_frame, |
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.close = yuv4_encode_close, |
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.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, |
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.long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"), |
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};
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