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
26 static av_cold int y41p_decode_init(AVCodecContext *avctx)
28 avctx->pix_fmt = AV_PIX_FMT_YUV411P;
29 avctx->bits_per_raw_sample = 12;
31 if (avctx->width & 7) {
32 av_log(avctx, AV_LOG_WARNING, "y41p requires width to be divisible by 8.\n");
35 avctx->coded_frame = avcodec_alloc_frame();
36 if (!avctx->coded_frame) {
37 av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
38 return AVERROR(ENOMEM);
44 static int y41p_decode_frame(AVCodecContext *avctx, void *data,
45 int *got_frame, AVPacket *avpkt)
47 AVFrame *pic = avctx->coded_frame;
48 uint8_t *src = avpkt->data;
53 avctx->release_buffer(avctx, pic);
55 if (avpkt->size < 1.5 * avctx->height * avctx->width) {
56 av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
57 return AVERROR(EINVAL);
62 if (ff_get_buffer(avctx, pic) < 0) {
63 av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
64 return AVERROR(ENOMEM);
68 pic->pict_type = AV_PICTURE_TYPE_I;
70 for (i = avctx->height - 1; i >= 0 ; i--) {
71 y = &pic->data[0][i * pic->linesize[0]];
72 u = &pic->data[1][i * pic->linesize[1]];
73 v = &pic->data[2][i * pic->linesize[2]];
74 for (j = 0; j < avctx->width; j += 8) {
93 *(AVFrame *)data = *pic;
98 static av_cold int y41p_decode_close(AVCodecContext *avctx)
100 if (avctx->coded_frame->data[0])
101 avctx->release_buffer(avctx, avctx->coded_frame);
103 av_freep(&avctx->coded_frame);
108 AVCodec ff_y41p_decoder = {
110 .type = AVMEDIA_TYPE_VIDEO,
111 .id = AV_CODEC_ID_Y41P,
112 .init = y41p_decode_init,
113 .decode = y41p_decode_frame,
114 .close = y41p_decode_close,
115 .capabilities = CODEC_CAP_DR1,
116 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),