4 * Copyright (c) 2012 Paul B Mahol
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 y41p_encode_init(AVCodecContext *avctx)
27 if (avctx->width & 7) {
28 av_log(avctx, AV_LOG_ERROR, "y41p requires width to be divisible by 8.\n");
29 return AVERROR_INVALIDDATA;
32 avctx->coded_frame = avcodec_alloc_frame();
33 avctx->bits_per_coded_sample = 12;
35 if (!avctx->coded_frame) {
36 av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
37 return AVERROR(ENOMEM);
43 static int y41p_encode_frame(AVCodecContext *avctx, uint8_t *buf,
44 int buf_size, void *data)
51 if (buf_size < avctx->width * avctx->height * 1.5) {
52 av_log(avctx, AV_LOG_ERROR, "Out buffer is too small.\n");
53 return AVERROR(ENOMEM);
56 avctx->coded_frame->reference = 0;
57 avctx->coded_frame->key_frame = 1;
58 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
60 for (i = avctx->height - 1; i >= 0; i--) {
61 y = &pic->data[0][i * pic->linesize[0]];
62 u = &pic->data[1][i * pic->linesize[1]];
63 v = &pic->data[2][i * pic->linesize[2]];
64 for (j = 0; j < avctx->width; j += 8) {
82 return avctx->width * avctx->height * 1.5;
85 static av_cold int y41p_encode_close(AVCodecContext *avctx)
87 av_freep(&avctx->coded_frame);
92 AVCodec ff_y41p_encoder = {
94 .type = AVMEDIA_TYPE_VIDEO,
96 .init = y41p_encode_init,
97 .encode = y41p_encode_frame,
98 .close = y41p_encode_close,
99 .pix_fmts = (const enum PixelFormat[]) { PIX_FMT_YUV411P,
101 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),