FFmpeg  4.4.6
v410dec.c
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1 /*
2  * v410 decoder
3  *
4  * Copyright (c) 2011 Derek Buitenhuis
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 
23 #include "libavutil/common.h"
24 #include "libavutil/intreadwrite.h"
25 #include "avcodec.h"
26 #include "internal.h"
27 #include "thread.h"
28 
29 typedef struct ThreadData {
30  AVFrame *frame;
31  uint8_t *buf;
32  int stride;
33 } ThreadData;
34 
36 {
38  avctx->bits_per_raw_sample = 10;
39 
40  if (avctx->width & 1) {
41  if (avctx->err_recognition & AV_EF_EXPLODE) {
42  av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n");
43  return AVERROR_INVALIDDATA;
44  } else {
45  av_log(avctx, AV_LOG_WARNING, "v410 requires width to be even, continuing anyway.\n");
46  }
47  }
48 
49  return 0;
50 }
51 
52 static int v410_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
53 {
54  ThreadData *td = arg;
55  AVFrame *pic = td->frame;
56  int stride = td->stride;
57  int thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
58  int slice_start = (avctx->height * jobnr) / thread_count;
59  int slice_end = (avctx->height * (jobnr+1)) / thread_count;
60  const uint8_t *src = td->buf + stride * slice_start;
61  uint16_t *y, *u, *v;
62  uint32_t val;
63  int i, j;
64 
65  y = (uint16_t*)pic->data[0] + slice_start * (pic->linesize[0] >> 1);
66  u = (uint16_t*)pic->data[1] + slice_start * (pic->linesize[1] >> 1);
67  v = (uint16_t*)pic->data[2] + slice_start * (pic->linesize[2] >> 1);
68 
69  for (i = slice_start; i < slice_end; i++) {
70  for (j = 0; j < avctx->width; j++) {
71  val = AV_RL32(src);
72 
73  u[j] = (val >> 2) & 0x3FF;
74  y[j] = (val >> 12) & 0x3FF;
75  v[j] = (val >> 22);
76 
77  src += 4;
78  }
79 
80  y += pic->linesize[0] >> 1;
81  u += pic->linesize[1] >> 1;
82  v += pic->linesize[2] >> 1;
83  }
84 
85  return 0;
86 }
87 
88 static int v410_decode_frame(AVCodecContext *avctx, void *data,
89  int *got_frame, AVPacket *avpkt)
90 {
91  ThreadData td;
92  ThreadFrame frame = { .f = data };
93  AVFrame *pic = data;
94  uint8_t *src = avpkt->data;
95  int ret;
96  int thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
97 
98  td.stride = avctx->width * 4;
99  if (avpkt->size < 4 * avctx->height * avctx->width) {
100  av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
101  return AVERROR(EINVAL);
102  }
103 
104  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
105  return ret;
106 
107  pic->key_frame = 1;
109 
110  td.buf = src;
111  td.frame = pic;
112  avctx->execute2(avctx, v410_decode_slice, &td, NULL, thread_count);
113 
114  *got_frame = 1;
115 
116  return avpkt->size;
117 }
118 
120  .name = "v410",
121  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
122  .type = AVMEDIA_TYPE_VIDEO,
123  .id = AV_CODEC_ID_V410,
124  .init = v410_decode_init,
125  .decode = v410_decode_frame,
126  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS |
128 };
static double val(void *priv, double ch)
Definition: aeval.c:76
#define av_cold
Definition: attributes.h:88
uint8_t
Libavcodec external API header.
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1660
#define AV_RL32
Definition: intreadwrite.h:146
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:264
common internal and external API header
#define av_clip
Definition: common.h:122
#define NULL
Definition: coverity.c:32
static AVFrame * frame
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:112
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:108
@ AV_CODEC_ID_V410
Definition: codec_id.h:206
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
int i
Definition: input.c:407
const char * arg
Definition: jacosubdec.c:66
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
int stride
Definition: mace.c:144
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2033
const char data[16]
Definition: mxf.c:142
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:402
FF_ENABLE_DEPRECATION_WARNINGS int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
#define td
Definition: regdef.h:70
main external API structure.
Definition: avcodec.h:536
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:746
int width
picture width / height.
Definition: avcodec.h:709
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1751
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:1777
int(* execute2)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)
The codec may call this to execute several independent things.
Definition: avcodec.h:1848
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:1649
AVCodec.
Definition: codec.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:204
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:332
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:396
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:349
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:401
This structure stores compressed data.
Definition: packet.h:346
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
Used for passing data between threads.
Definition: dsddec.c:67
uint8_t * buf
Definition: v210dec.c:43
int stride
Definition: v210dec.c:44
AVFrame * frame
Definition: dsddec.c:68
#define av_log(a,...)
#define src
Definition: vp8dsp.c:255
AVCodec ff_v410_decoder
Definition: v410dec.c:119
static av_cold int v410_decode_init(AVCodecContext *avctx)
Definition: v410dec.c:35
static int v410_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
Definition: v410dec.c:52
static int v410_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: v410dec.c:88