1 /*
2 * libquicktime yuv4 decoder
3 *
4 * Copyright (c) 2011 Carl Eugen Hoyos
5 *
6 * This file is part of FFmpeg.
7 *
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.
12 *
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.
17 *
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
21 */
22
25
27 {
29
30 return 0;
31 }
32
35 {
39 int i, j, ret;
40
41 if (avpkt->
size < 6 * (avctx->
width + 1 >> 1) * (avctx->
height + 1 >> 1)) {
44 }
45
47 return ret;
48
51
55
56 for (i = 0; i < (avctx->
height + 1) >> 1; i++) {
57 for (j = 0; j < (avctx->
width + 1) >> 1; j++) {
58 u[j] = *src++ ^ 0x80;
59 v[j] = *src++ ^ 0x80;
60 y[ 2 * j ] = *src++;
61 y[ 2 * j + 1] = *src++;
62 y[pic->
linesize[0] + 2 * j ] = *src++;
63 y[pic->
linesize[0] + 2 * j + 1] = *src++;
64 }
65
69 }
70
71 *got_frame = 1;
72
74 }
75
84 };
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
static int yuv4_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int yuv4_decode_init(AVCodecContext *avctx)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
const char * name
Name of the codec implementation.
enum AVPictureType pict_type
Picture type of the frame.
int width
picture width / height.
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
common internal api header.
int key_frame
1 -> keyframe, 0-> not
This structure stores compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.