FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
v408dec.c
Go to the documentation of this file.
1 /*
2  * v408 decoder
3  * Copyright (c) 2012 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 {
28 
29  return 0;
30 }
31 
32 static int v408_decode_frame(AVCodecContext *avctx, void *data,
33  int *got_frame, AVPacket *avpkt)
34 {
35  AVFrame *pic = data;
36  const uint8_t *src = avpkt->data;
37  uint8_t *y, *u, *v, *a;
38  int i, j, ret;
39 
40  if (avpkt->size < 4 * avctx->height * avctx->width) {
41  av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
42  return AVERROR(EINVAL);
43  }
44 
45  if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
46  return ret;
47 
48  pic->key_frame = 1;
50 
51  y = pic->data[0];
52  u = pic->data[1];
53  v = pic->data[2];
54  a = pic->data[3];
55 
56  for (i = 0; i < avctx->height; i++) {
57  for (j = 0; j < avctx->width; j++) {
58  if (avctx->codec_id==AV_CODEC_ID_AYUV) {
59  v[j] = *src++;
60  u[j] = *src++;
61  y[j] = *src++;
62  a[j] = *src++;
63  } else {
64  u[j] = *src++;
65  y[j] = *src++;
66  v[j] = *src++;
67  a[j] = *src++;
68  }
69  }
70 
71  y += pic->linesize[0];
72  u += pic->linesize[1];
73  v += pic->linesize[2];
74  a += pic->linesize[3];
75  }
76 
77  *got_frame = 1;
78 
79  return avpkt->size;
80 }
81 
82 #if CONFIG_AYUV_DECODER
83 AVCodec ff_ayuv_decoder = {
84  .name = "ayuv",
85  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed MS 4:4:4:4"),
86  .type = AVMEDIA_TYPE_VIDEO,
87  .id = AV_CODEC_ID_AYUV,
88  .init = v408_decode_init,
89  .decode = v408_decode_frame,
90  .capabilities = AV_CODEC_CAP_DR1,
91 };
92 #endif
93 #if CONFIG_V408_DECODER
94 AVCodec ff_v408_decoder = {
95  .name = "v408",
96  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed QT 4:4:4:4"),
97  .type = AVMEDIA_TYPE_VIDEO,
98  .id = AV_CODEC_ID_V408,
99  .init = v408_decode_init,
100  .decode = v408_decode_frame,
101  .capabilities = AV_CODEC_CAP_DR1,
102 };
103 #endif
float v
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
int size
Definition: avcodec.h:1423
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1721
AVCodec.
Definition: avcodec.h:3471
uint8_t
#define av_cold
Definition: attributes.h:74
uint8_t * data
Definition: avcodec.h:1422
#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:175
const char * name
Name of the codec implementation.
Definition: avcodec.h:3478
Libavcodec external API header.
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:242
float y
int width
picture width / height.
Definition: avcodec.h:1680
float u
AVS_Value src
Definition: avisynth_c.h:482
enum AVCodecID codec_id
Definition: avcodec.h:1518
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:280
main external API structure.
Definition: avcodec.h:1501
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:1040
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
common internal api header.
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:237
static av_cold int v408_decode_init(AVCodecContext *avctx)
Definition: v408dec.c:25
This structure stores compressed data.
Definition: avcodec.h:1399
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:856
static int v408_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: v408dec.c:32