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 "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 };
#define NULL
Definition: coverity.c:32
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:308
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
AVFrame * frame
Definition: dsddec.c:68
int size
Definition: packet.h:364
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:736
static av_cold int v410_decode_init(AVCodecContext *avctx)
Definition: v410dec.c:35
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1757
AVCodec.
Definition: codec.h:190
uint8_t
#define av_cold
Definition: attributes.h:88
Multithreading support functions.
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:262
uint8_t * data
Definition: packet.h:363
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
#define td
Definition: regdef.h:70
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
const uint8_t * src
Definition: vf_bm3d.c:56
static int v410_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
Definition: v410dec.c:52
const char * arg
Definition: jacosubdec.c:66
const char * name
Name of the codec implementation.
Definition: codec.h:197
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:402
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:106
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before as well as code calling up to before the decode process starts Call have so the codec calls ff_thread_report set FF_CODEC_CAP_ALLOCATE_PROGRESS in AVCodec caps_internal and use ff_thread_get_buffer() to allocate frames.The frames must then be freed with ff_thread_release_buffer().Otherwise decode directly into the user-supplied frames.Call ff_thread_report_progress() after some part of the current picture has decoded.A good place to put this is where draw_horiz_band() is called-add this if it isn't called anywhere
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:391
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:1655
int width
picture width / height.
Definition: avcodec.h:699
AVCodec ff_v410_decoder
Definition: v410dec.c:119
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1666
double * data[MAX_DATA][NUM_PLANES]
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:1785
static int v410_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: v410dec.c:88
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:110
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:1845
Libavcodec external API header.
Used for passing data between threads.
Definition: dsddec.c:67
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:339
main external API structure.
Definition: avcodec.h:526
AVPacket * avpkt
Definition: dsddec.c:69
uint8_t * buf
Definition: v210dec.c:43
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:322
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:104
common internal api header.
common internal and external API header
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2035
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:386
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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:91
static double val(void *priv, double ch)
Definition: aeval.c:76
This structure stores compressed data.
Definition: packet.h:340
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50
int stride
Definition: v210dec.c:44
int i
Definition: input.c:407