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v308dec.c
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1 /*
2  * v308 decoder
3  * Copyright (c) 2011 Carl Eugen Hoyos
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "avcodec.h"
23 #include "internal.h"
24 
26 {
27  avctx->pix_fmt = AV_PIX_FMT_YUV444P;
28 
29  if (avctx->width & 1)
30  av_log(avctx, AV_LOG_WARNING, "v308 requires width to be even.\n");
31 
32  return 0;
33 }
34 
35 static int v308_decode_frame(AVCodecContext *avctx, void *data,
36  int *got_frame, AVPacket *avpkt)
37 {
38  AVFrame *pic = data;
39  const uint8_t *src = avpkt->data;
40  uint8_t *y, *u, *v;
41  int i, j, ret;
42 
43  if (avpkt->size < 3 * avctx->height * avctx->width) {
44  av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
45  return AVERROR(EINVAL);
46  }
47 
48  if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
49  return ret;
50 
51  pic->key_frame = 1;
53 
54  y = pic->data[0];
55  u = pic->data[1];
56  v = pic->data[2];
57 
58  for (i = 0; i < avctx->height; i++) {
59  for (j = 0; j < avctx->width; j++) {
60  v[j] = *src++;
61  y[j] = *src++;
62  u[j] = *src++;
63  }
64 
65  y += pic->linesize[0];
66  u += pic->linesize[1];
67  v += pic->linesize[2];
68  }
69 
70  *got_frame = 1;
71 
72  return avpkt->size;
73 }
74 
76  .name = "v308",
77  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:4:4"),
78  .type = AVMEDIA_TYPE_VIDEO,
79  .id = AV_CODEC_ID_V308,
80  .init = v308_decode_init,
81  .decode = v308_decode_frame,
82  .capabilities = AV_CODEC_CAP_DR1,
83 };
static av_cold int v308_decode_init(AVCodecContext *avctx)
Definition: v308dec.c:25
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int size
Definition: avcodec.h:1589
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1885
AVCodec.
Definition: avcodec.h:3559
uint8_t
#define av_cold
Definition: attributes.h:82
uint8_t * data
Definition: avcodec.h:1588
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
const char * name
Name of the codec implementation.
Definition: avcodec.h:3566
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:258
int width
picture width / height.
Definition: avcodec.h:1844
#define src
Definition: vp9dsp.c:530
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:215
main external API structure.
Definition: avcodec.h:1657
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:928
#define u(width,...)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
common internal api header.
AVCodec ff_v308_decoder
Definition: v308dec.c:75
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:253
static int v308_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: v308dec.c:35
This structure stores compressed data.
Definition: avcodec.h:1565
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:956