FFmpeg
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 "codec_internal.h"
27 #include "thread.h"
28 
29 typedef struct ThreadData {
30  AVFrame *frame;
31  const 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, AVFrame *pic,
89  int *got_frame, AVPacket *avpkt)
90 {
91  ThreadData td;
92  const uint8_t *src = avpkt->data;
93  int ret;
94  int thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
95 
96  td.stride = avctx->width * 4;
97  if (avpkt->size < 4 * avctx->height * avctx->width) {
98  av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
99  return AVERROR(EINVAL);
100  }
101 
102  if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
103  return ret;
104 
105  td.buf = src;
106  td.frame = pic;
107  avctx->execute2(avctx, v410_decode_slice, &td, NULL, thread_count);
108 
109  *got_frame = 1;
110 
111  return avpkt->size;
112 }
113 
115  .p.name = "v410",
116  CODEC_LONG_NAME("Uncompressed 4:4:4 10-bit"),
117  .p.type = AVMEDIA_TYPE_VIDEO,
118  .p.id = AV_CODEC_ID_V410,
119  .init = v410_decode_init,
121  .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS |
123 };
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
td
#define td
Definition: regdef.h:70
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: defs.h:51
av_clip
#define av_clip
Definition: common.h:99
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:251
AVCodecContext::err_recognition
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:1420
v410_decode_init
static av_cold int v410_decode_init(AVCodecContext *avctx)
Definition: v410dec.c:35
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:374
ThreadData::stride
int stride
Definition: v210dec.c:38
AVPacket::data
uint8_t * data
Definition: packet.h:524
FFCodec
Definition: codec_internal.h:126
ThreadData::frame
AVFrame * frame
Definition: dsddec.c:72
thread.h
v410_decode_frame
static int v410_decode_frame(AVCodecContext *avctx, AVFrame *pic, int *got_frame, AVPacket *avpkt)
Definition: v410dec.c:88
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:395
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:130
ThreadData::buf
const uint8_t * buf
Definition: v210dec.c:37
AVCodecContext::thread_count
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:1583
val
static double val(void *priv, double ch)
Definition: aeval.c:78
AV_PIX_FMT_YUV444P10
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:481
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:286
v410_decode_slice
static int v410_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
Definition: v410dec.c:52
intreadwrite.h
ff_thread_get_buffer
int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
Definition: pthread_frame.c:986
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:1730
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1575
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:271
arg
const char * arg
Definition: jacosubdec.c:67
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:110
NULL
#define NULL
Definition: coverity.c:32
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:525
codec_internal.h
AV_CODEC_CAP_SLICE_THREADS
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:114
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
common.h
ThreadData
Used for passing data between threads.
Definition: dsddec.c:71
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:194
AVCodecContext::height
int height
Definition: avcodec.h:618
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:657
avcodec.h
stride
#define stride
Definition: h264pred_template.c:537
ret
ret
Definition: filter_design.txt:187
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
AVCodecContext
main external API structure.
Definition: avcodec.h:445
AV_CODEC_ID_V410
@ AV_CODEC_ID_V410
Definition: codec_id.h:209
slice_start
static int slice_start(SliceContext *sc, VVCContext *s, VVCFrameContext *fc, const CodedBitstreamUnit *unit, const int is_first_slice)
Definition: dec.c:699
ff_v410_decoder
const FFCodec ff_v410_decoder
Definition: v410dec.c:114
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVPacket
This structure stores compressed data.
Definition: packet.h:501
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:618
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:419
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
AVCodecContext::execute2
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:1632