FFmpeg
v408dec.c
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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 "config_components.h"
23 
24 #include "avcodec.h"
25 #include "codec_internal.h"
26 #include "decode.h"
27 
29 {
31 
32 #if FF_API_AYUV_CODECID
33  if (avctx->codec_id==AV_CODEC_ID_AYUV)
34  av_log(avctx, AV_LOG_WARNING, "This decoder is deprecated and will be removed.\n");
35 #endif
36  return 0;
37 }
38 
39 static int v408_decode_frame(AVCodecContext *avctx, AVFrame *pic,
40  int *got_frame, AVPacket *avpkt)
41 {
42  const uint8_t *src = avpkt->data;
43  uint8_t *y, *u, *v, *a;
44  int i, j, ret;
45 
46  if (avpkt->size < 4 * avctx->height * avctx->width) {
47  av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
48  return AVERROR(EINVAL);
49  }
50 
51  if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
52  return ret;
53 
54  pic->flags |= AV_FRAME_FLAG_KEY;
56 
57  y = pic->data[0];
58  u = pic->data[1];
59  v = pic->data[2];
60  a = pic->data[3];
61 
62  for (i = 0; i < avctx->height; i++) {
63  for (j = 0; j < avctx->width; j++) {
64 #if FF_API_AYUV_CODECID
65  if (avctx->codec_id==AV_CODEC_ID_AYUV) {
66  v[j] = *src++;
67  u[j] = *src++;
68  y[j] = *src++;
69  a[j] = *src++;
70  } else
71 #endif
72  {
73  u[j] = *src++;
74  y[j] = *src++;
75  v[j] = *src++;
76  a[j] = *src++;
77  }
78  }
79 
80  y += pic->linesize[0];
81  u += pic->linesize[1];
82  v += pic->linesize[2];
83  a += pic->linesize[3];
84  }
85 
86  *got_frame = 1;
87 
88  return avpkt->size;
89 }
90 
91 #if FF_API_AYUV_CODECID
92 #if CONFIG_AYUV_DECODER
93 const FFCodec ff_ayuv_decoder = {
94  .p.name = "ayuv",
95  CODEC_LONG_NAME("Uncompressed packed MS 4:4:4:4"),
96  .p.type = AVMEDIA_TYPE_VIDEO,
97  .p.id = AV_CODEC_ID_AYUV,
98  .init = v408_decode_init,
100  .p.capabilities = AV_CODEC_CAP_DR1,
101 };
102 #endif
103 #endif
104 #if CONFIG_V408_DECODER
105 const FFCodec ff_v408_decoder = {
106  .p.name = "v408",
107  CODEC_LONG_NAME("Uncompressed packed QT 4:4:4:4"),
108  .p.type = AVMEDIA_TYPE_VIDEO,
109  .p.id = AV_CODEC_ID_V408,
110  .init = v408_decode_init,
112  .p.capabilities = AV_CODEC_CAP_DR1,
113 };
114 #endif
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
u
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:240
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
AVPacket::data
uint8_t * data
Definition: packet.h:522
FFCodec
Definition: codec_internal.h:127
AVFrame::flags
int flags
Frame flags, a combination of AV_FRAME_FLAGS.
Definition: frame.h:649
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:361
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:131
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
ff_v408_decoder
const FFCodec ff_v408_decoder
av_cold
#define av_cold
Definition: attributes.h:90
AV_FRAME_FLAG_KEY
#define AV_FRAME_FLAG_KEY
A flag to mark frames that are keyframes.
Definition: frame.h:628
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:306
decode.h
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:272
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:455
ff_ayuv_decoder
const FFCodec ff_ayuv_decoder
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:279
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:442
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1618
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVPacket::size
int size
Definition: packet.h:523
codec_internal.h
v408_decode_frame
static int v408_decode_frame(AVCodecContext *avctx, AVFrame *pic, int *got_frame, AVPacket *avpkt)
Definition: v408dec.c:39
AV_CODEC_ID_AYUV
@ AV_CODEC_ID_AYUV
Definition: codec_id.h:257
AV_CODEC_ID_V408
@ AV_CODEC_ID_V408
Definition: codec_id.h:261
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
AV_PIX_FMT_YUVA444P
@ AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:174
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:245
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:194
AVCodecContext::height
int height
Definition: avcodec.h:625
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:662
avcodec.h
ret
ret
Definition: filter_design.txt:187
AVCodecContext
main external API structure.
Definition: avcodec.h:445
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVPacket
This structure stores compressed data.
Definition: packet.h:499
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:625
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:385
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
v408_decode_init
static av_cold int v408_decode_init(AVCodecContext *avctx)
Definition: v408dec.c:28