2 * libquicktime yuv4 encoder
4 * Copyright (c) 2011 Carl Eugen Hoyos
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 static av_cold int yuv4_encode_init(AVCodecContext *avctx)
27 avctx->coded_frame = avcodec_alloc_frame();
29 if (!avctx->coded_frame) {
30 av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
31 return AVERROR(ENOMEM);
37 static int yuv4_encode_frame(AVCodecContext *avctx, uint8_t *buf,
38 int buf_size, void *data)
46 if (buf_size < 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1)) {
47 av_log(avctx, AV_LOG_ERROR, "Out buffer is too small.\n");
48 return AVERROR(ENOMEM);
51 avctx->coded_frame->reference = 0;
52 avctx->coded_frame->key_frame = 1;
53 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
59 for (i = 0; i < avctx->height + 1 >> 1; i++) {
60 for (j = 0; j < avctx->width + 1 >> 1; j++) {
64 *dst++ = y[ 2 * j + 1];
65 *dst++ = y[pic->linesize[0] + 2 * j ];
66 *dst++ = y[pic->linesize[0] + 2 * j + 1];
69 y += 2 * pic->linesize[0];
70 u += pic->linesize[1];
71 v += pic->linesize[2];
77 static av_cold int yuv4_encode_close(AVCodecContext *avctx)
79 av_freep(&avctx->coded_frame);
84 AVCodec ff_yuv4_encoder = {
86 .type = AVMEDIA_TYPE_VIDEO,
88 .init = yuv4_encode_init,
89 .encode = yuv4_encode_frame,
90 .close = yuv4_encode_close,
91 .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_YUV420P, PIX_FMT_NONE },
92 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"),