FFmpeg
libuavs3d.c
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1 /*
2  * AVS3-P2/IEEE1857.10 video decoder (using the uavs3d library)
3  * Copyright (c) 2020 Zhenyu Wang <wangzhenyu@pkusz.edu.cn>
4  * Bingjie Han <hanbj@pkusz.edu.cn>
5  * Huiwen Ren <hwrenx@gmail.com>
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #include "libavutil/avutil.h"
25 #include "libavutil/common.h"
26 #include "libavutil/cpu.h"
27 #include "libavutil/imgutils.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/opt.h"
30 #include "avcodec.h"
31 #include "avs3.h"
32 #include "codec_internal.h"
33 #include "decode.h"
34 #include "uavs3d.h"
35 
36 typedef struct uavs3d_context {
38  void *dec_handle;
41  uavs3d_io_frm_t dec_frame;
43 
44 #define UAVS3D_CHECK_START_CODE(data_ptr, PIC_START_CODE) \
45  (AV_RL32(data_ptr) != (PIC_START_CODE << 24) + AVS3_NAL_START_CODE)
46 static int uavs3d_find_next_start_code(const unsigned char *bs_data, int bs_len, int *left)
47 {
48  const unsigned char *data_ptr = bs_data + 4;
49  int count = bs_len - 4;
50 
51  while (count >= 4 &&
57  data_ptr++;
58  count--;
59  }
60 
61  if (count >= 4) {
62  *left = count;
63  return 1;
64  }
65 
66  return 0;
67 }
68 
69 static void uavs3d_output_callback(uavs3d_io_frm_t *dec_frame) {
70  uavs3d_io_frm_t frm_out;
71  AVFrame *frm = (AVFrame *)dec_frame->priv;
72  int i;
73 
74  if (!frm || !frm->data[0]) {
75  dec_frame->got_pic = 0;
76  av_log(NULL, AV_LOG_ERROR, "Invalid AVFrame in uavs3d output.\n");
77  return;
78  }
79 
80  frm->pts = dec_frame->pts;
81  frm->pkt_dts = dec_frame->dts;
82  frm->pkt_pos = dec_frame->pkt_pos;
83  frm->pkt_size = dec_frame->pkt_size;
84  frm->coded_picture_number = dec_frame->dtr;
85  frm->display_picture_number = dec_frame->ptr;
86 
87  if (dec_frame->type < 0 || dec_frame->type >= FF_ARRAY_ELEMS(ff_avs3_image_type)) {
88  av_log(NULL, AV_LOG_WARNING, "Error frame type in uavs3d: %d.\n", dec_frame->type);
89  } else {
90  frm->pict_type = ff_avs3_image_type[dec_frame->type];
91  frm->key_frame = (frm->pict_type == AV_PICTURE_TYPE_I);
92  }
93 
94  for (i = 0; i < 3; i++) {
95  frm_out.width [i] = dec_frame->width[i];
96  frm_out.height[i] = dec_frame->height[i];
97  frm_out.stride[i] = frm->linesize[i];
98  frm_out.buffer[i] = frm->data[i];
99  }
100 
101  uavs3d_img_cpy_cvt(&frm_out, dec_frame, dec_frame->bit_depth);
102 }
103 
105 {
106  uavs3d_context *h = avctx->priv_data;
107  uavs3d_cfg_t cdsc;
108 
109  cdsc.frm_threads = avctx->thread_count > 0 ? avctx->thread_count : av_cpu_count();
110  cdsc.check_md5 = 0;
111  h->dec_handle = uavs3d_create(&cdsc, uavs3d_output_callback, NULL);
112  h->got_seqhdr = 0;
113 
114  if (!h->dec_handle) {
115  return AVERROR(ENOMEM);
116  }
117 
118  return 0;
119 }
120 
122 {
123  uavs3d_context *h = avctx->priv_data;
124 
125  if (h->dec_handle) {
126  uavs3d_flush(h->dec_handle, NULL);
127  uavs3d_delete(h->dec_handle);
128  h->dec_handle = NULL;
129  }
130  h->got_seqhdr = 0;
131 
132  return 0;
133 }
134 
135 static void libuavs3d_flush(AVCodecContext * avctx)
136 {
137  uavs3d_context *h = avctx->priv_data;
138 
139  if (h->dec_handle) {
140  uavs3d_reset(h->dec_handle);
141  }
142 }
143 
144 #define UAVS3D_CHECK_INVALID_RANGE(v, l, r) ((v)<(l)||(v)>(r))
146  int *got_frame, AVPacket *avpkt)
147 {
148  uavs3d_context *h = avctx->priv_data;
149  const uint8_t *buf = avpkt->data;
150  int buf_size = avpkt->size;
151  const uint8_t *buf_end;
152  const uint8_t *buf_ptr = buf;
153  int left_bytes;
154  int ret, finish = 0;
155 
156  *got_frame = 0;
157  frm->pts = -1;
159 
160  if (!buf_size) {
161  if (h->got_seqhdr) {
162  if (!frm->data[0] && (ret = ff_get_buffer(avctx, frm, 0)) < 0) {
163  return ret;
164  }
165  h->dec_frame.priv = frm; // AVFrame
166  }
167  do {
168  ret = uavs3d_flush(h->dec_handle, &h->dec_frame);
169  } while (ret > 0 && !h->dec_frame.got_pic);
170  } else {
171  uavs3d_io_frm_t *frm_dec = &h->dec_frame;
172 
173  buf_end = buf + buf_size;
174  frm_dec->pkt_pos = avpkt->pos;
175  frm_dec->pkt_size = avpkt->size;
176 
177  while (!finish) {
178  int bs_len;
179 
180  if (h->got_seqhdr) {
181  if (!frm->data[0] && (ret = ff_get_buffer(avctx, frm, 0)) < 0) {
182  return ret;
183  }
184  h->dec_frame.priv = frm; // AVFrame
185  }
186 
187  if (uavs3d_find_next_start_code(buf_ptr, buf_end - buf_ptr, &left_bytes)) {
188  bs_len = buf_end - buf_ptr - left_bytes;
189  } else {
190  bs_len = buf_end - buf_ptr;
191  finish = 1;
192  }
193  frm_dec->bs = (unsigned char *)buf_ptr;
194  frm_dec->bs_len = bs_len;
195  frm_dec->pts = avpkt->pts;
196  frm_dec->dts = avpkt->dts;
197  uavs3d_decode(h->dec_handle, frm_dec);
198  buf_ptr += bs_len;
199 
200  if (frm_dec->nal_type == NAL_SEQ_HEADER) {
201  struct uavs3d_com_seqh_t *seqh = frm_dec->seqhdr;
202  if (UAVS3D_CHECK_INVALID_RANGE(seqh->frame_rate_code, 0, 15)) {
203  av_log(avctx, AV_LOG_ERROR, "Invalid frame rate code: %d.\n", seqh->frame_rate_code);
204  seqh->frame_rate_code = 3; // default 25 fps
205  } else {
206  avctx->framerate.num = ff_avs3_frame_rate_tab[seqh->frame_rate_code].num;
207  avctx->framerate.den = ff_avs3_frame_rate_tab[seqh->frame_rate_code].den;
208  }
209  avctx->has_b_frames = seqh->output_reorder_delay;
210  avctx->pix_fmt = seqh->bit_depth_internal == 8 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUV420P10LE;
211  ret = ff_set_dimensions(avctx, seqh->horizontal_size, seqh->vertical_size);
212  if (ret < 0)
213  return ret;
214  h->got_seqhdr = 1;
215 
216  if (seqh->colour_description) {
217  if (UAVS3D_CHECK_INVALID_RANGE(seqh->colour_primaries, 0, 9) ||
218  UAVS3D_CHECK_INVALID_RANGE(seqh->transfer_characteristics, 0, 14) ||
219  UAVS3D_CHECK_INVALID_RANGE(seqh->matrix_coefficients, 0, 11)) {
220  av_log(avctx, AV_LOG_ERROR,
221  "Invalid colour description: primaries: %d"
222  "transfer characteristics: %d"
223  "matrix coefficients: %d.\n",
224  seqh->colour_primaries,
225  seqh->transfer_characteristics,
226  seqh->matrix_coefficients);
227  } else {
228  avctx->color_primaries = ff_avs3_color_primaries_tab[seqh->colour_primaries];
229  avctx->color_trc = ff_avs3_color_transfer_tab [seqh->transfer_characteristics];
230  avctx->colorspace = ff_avs3_color_matrix_tab [seqh->matrix_coefficients];
231  }
232  }
233  }
234  if (frm_dec->got_pic) {
235  break;
236  }
237  }
238  }
239 
240  *got_frame = h->dec_frame.got_pic;
241 
242  if (!(*got_frame)) {
243  av_frame_unref(frm);
244  }
245 
246  return buf_ptr - buf;
247 }
248 
250  .p.name = "libuavs3d",
251  CODEC_LONG_NAME("libuavs3d AVS3-P2/IEEE1857.10"),
252  .p.type = AVMEDIA_TYPE_VIDEO,
253  .p.id = AV_CODEC_ID_AVS3,
254  .priv_data_size = sizeof(uavs3d_context),
255  .init = libuavs3d_init,
256  .close = libuavs3d_end,
259  .caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE |
261  .flush = libuavs3d_flush,
262  .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
264  AV_PIX_FMT_NONE },
265  .p.wrapper_name = "libuavs3d",
266 };
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
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
opt.h
AVCodecContext::colorspace
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:975
AVFrame::coded_picture_number
int coded_picture_number
picture number in bitstream order
Definition: frame.h:452
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:432
AVCodecContext::color_trc
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:968
uavs3d_context::dec_frame
uavs3d_io_frm_t dec_frame
Definition: libuavs3d.c:41
AVPacket::data
uint8_t * data
Definition: packet.h:374
UAVS3D_CHECK_INVALID_RANGE
#define UAVS3D_CHECK_INVALID_RANGE(v, l, r)
Definition: libuavs3d.c:144
FF_CODEC_CAP_NOT_INIT_THREADSAFE
#define FF_CODEC_CAP_NOT_INIT_THREADSAFE
The codec is not known to be init-threadsafe (i.e.
Definition: codec_internal.h:34
uavs3d_output_callback
static void uavs3d_output_callback(uavs3d_io_frm_t *dec_frame)
Definition: libuavs3d.c:69
FFCodec
Definition: codec_internal.h:119
ff_set_dimensions
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:91
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:346
AVCodecContext::framerate
AVRational framerate
Definition: avcodec.h:1735
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:123
finish
static void finish(void)
Definition: movenc.c:342
uavs3d_context::got_seqhdr
int got_seqhdr
Definition: libuavs3d.c:40
libuavs3d_decode_frame
static int libuavs3d_decode_frame(AVCodecContext *avctx, AVFrame *frm, int *got_frame, AVPacket *avpkt)
Definition: libuavs3d.c:145
AVCodecContext::thread_count
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:1466
uavs3d_context
Definition: libuavs3d.c:36
AVFrame::key_frame
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:417
AVRational::num
int num
Numerator.
Definition: rational.h:59
AV_PIX_FMT_YUV420P10LE
@ AV_PIX_FMT_YUV420P10LE
planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
Definition: pixfmt.h:149
AVCodecContext::color_primaries
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:961
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
av_cold
#define av_cold
Definition: attributes.h:90
AVCodecContext::has_b_frames
int has_b_frames
Size of the frame reordering buffer in the decoder.
Definition: avcodec.h:694
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:298
intreadwrite.h
AVS3_INTRA_PIC_START_CODE
#define AVS3_INTRA_PIC_START_CODE
Definition: avs3.h:30
AVFrame::pkt_pos
int64_t pkt_pos
reordered pos from the last AVPacket that has been input into the decoder
Definition: frame.h:605
AV_CODEC_CAP_OTHER_THREADS
#define AV_CODEC_CAP_OTHER_THREADS
Codec supports multithreading through a method other than slice- or frame-level multithreading.
Definition: codec.h:127
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts_bsf.c:363
decode.h
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:264
if
if(ret)
Definition: filter_design.txt:179
AV_CODEC_ID_AVS3
@ AV_CODEC_ID_AVS3
Definition: codec_id.h:248
libuavs3d_flush
static void libuavs3d_flush(AVCodecContext *avctx)
Definition: libuavs3d.c:135
ff_avs3_color_matrix_tab
static const int ff_avs3_color_matrix_tab[12]
Definition: avs3.h:96
NULL
#define NULL
Definition: coverity.c:32
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
AVFrame::pkt_dts
int64_t pkt_dts
DTS copied from the AVPacket that triggered returning this frame.
Definition: frame.h:439
uavs3d_context::frame_threads
int frame_threads
Definition: libuavs3d.c:39
ff_avs3_color_primaries_tab
static const int ff_avs3_color_primaries_tab[10]
Definition: avs3.h:65
av_cpu_count
int av_cpu_count(void)
Definition: cpu.c:206
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1420
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:422
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:375
codec_internal.h
cpu.h
ff_avs3_frame_rate_tab
static const AVRational ff_avs3_frame_rate_tab[16]
Definition: avs3.h:46
AV_PICTURE_TYPE_NONE
@ AV_PICTURE_TYPE_NONE
Undefined.
Definition: avutil.h:273
ff_avs3_image_type
static enum AVPictureType ff_avs3_image_type[4]
Definition: avs3.h:111
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:373
uavs3d_context::dec_handle
void * dec_handle
Definition: libuavs3d.c:38
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:367
common.h
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:487
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:211
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:608
avcodec.h
ff_avs3_color_transfer_tab
static const int ff_avs3_color_transfer_tab[15]
Definition: avs3.h:78
ret
ret
Definition: filter_design.txt:187
AVS3_SEQ_START_CODE
#define AVS3_SEQ_START_CODE
Definition: avs3.h:27
left
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2] ... the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so ...,+,-,+,-,+,+,-,+,-,+,... hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32 - hcoeff[1] - hcoeff[2] - ... a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2} an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||......... intra?||||:Block01 :yes no||||:Block02 :....... ..........||||:Block03 ::y DC ::ref index:||||:Block04 ::cb DC ::motion x :||||......... :cr DC ::motion y :||||....... ..........|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------ ------------ ------------|||Y subbands||Cb subbands||Cr subbands||||--- ---||--- ---||--- ---|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------ ------------ ------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction ------------|\ Dequantization ------------------- \||Reference frames|\ IDWT|------- -------|Motion \|||Frame 0||Frame 1||Compensation . OBMC v -------|------- -------|--------------. \------> Frame n output Frame Frame<----------------------------------/|...|------------------- Range Coder:============Binary Range Coder:------------------- The implemented range coder is an adapted version based upon "Range encoding: an algorithm for removing redundancy from a digitised message." by G. N. N. Martin. The symbols encoded by the Snow range coder are bits(0|1). The associated probabilities are not fix but change depending on the symbol mix seen so far. bit seen|new state ---------+----------------------------------------------- 0|256 - state_transition_table[256 - old_state];1|state_transition_table[old_state];state_transition_table={ 0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:------------------------- FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1. the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled left
Definition: snow.txt:386
AVCodecContext
main external API structure.
Definition: avcodec.h:398
AVRational::den
int den
Denominator.
Definition: rational.h:60
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
avs3.h
AVFrame::pkt_size
int pkt_size
size of the corresponding packet containing the compressed frame.
Definition: frame.h:658
AV_CODEC_CAP_DELAY
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: codec.h:82
UAVS3D_CHECK_START_CODE
#define UAVS3D_CHECK_START_CODE(data_ptr, PIC_START_CODE)
Definition: libuavs3d.c:44
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
avutil.h
uavs3d_find_next_start_code
static int uavs3d_find_next_start_code(const unsigned char *bs_data, int bs_len, int *left)
Definition: libuavs3d.c:46
FF_CODEC_CAP_AUTO_THREADS
#define FF_CODEC_CAP_AUTO_THREADS
Codec handles avctx->thread_count == 0 (auto) internally.
Definition: codec_internal.h:73
libuavs3d_init
static av_cold int libuavs3d_init(AVCodecContext *avctx)
Definition: libuavs3d.c:104
AVS3_SEQ_END_CODE
#define AVS3_SEQ_END_CODE
Definition: avs3.h:28
AVPacket
This structure stores compressed data.
Definition: packet.h:351
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:425
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:394
ff_libuavs3d_decoder
const FFCodec ff_libuavs3d_decoder
Definition: libuavs3d.c:249
imgutils.h
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:370
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
h
h
Definition: vp9dsp_template.c:2038
AVS3_FIRST_SLICE_START_CODE
#define AVS3_FIRST_SLICE_START_CODE
Definition: avs3.h:35
AVS3_INTER_PIC_START_CODE
#define AVS3_INTER_PIC_START_CODE
Definition: avs3.h:33
uavs3d_context::avctx
AVCodecContext * avctx
Definition: libuavs3d.c:37
AVFrame::display_picture_number
int display_picture_number
picture number in display order
Definition: frame.h:456
libuavs3d_end
static av_cold int libuavs3d_end(AVCodecContext *avctx)
Definition: libuavs3d.c:121