FFmpeg
libxavs2.c
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1 /*
2  * AVS2 encoding using the xavs2 library
3  *
4  * Copyright (C) 2018 Yiqun Xu, <yiqun.xu@vipl.ict.ac.cn>
5  * Falei Luo, <falei.luo@gmail.com>
6  * Huiwen Ren, <hwrenx@gmail.com>
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 #include "xavs2.h"
26 #include "codec_internal.h"
27 #include "encode.h"
28 #include "mpeg12.h"
29 #include "libavutil/avstring.h"
30 #include "libavutil/opt.h"
31 
32 #define xavs2_opt_set2(name, format, ...) do{ \
33  char opt_str[16] = {0}; \
34  int err; \
35  av_strlcatf(opt_str, sizeof(opt_str), format, __VA_ARGS__); \
36  err = cae->api->opt_set2(cae->param, name, opt_str); \
37  if (err < 0) {\
38  av_log(avctx, AV_LOG_WARNING, "Invalid value for %s: %s\n", name, opt_str);\
39  }\
40 } while(0);
41 
42 typedef struct XAVS2EContext {
43  AVClass *class;
44 
45  int lcu_row_threads;
46  int initial_qp;
47  int qp;
48  int max_qp;
49  int min_qp;
50  int preset_level;
51  int log_level;
52 
53  void *encoder;
54  AVDictionary *xavs2_opts;
55 
56  xavs2_outpacket_t packet;
57  xavs2_param_t *param;
58 
59  const xavs2_api_t *api;
60 
61 } XAVS2EContext;
62 
63 static av_cold int xavs2_init(AVCodecContext *avctx)
64 {
65  XAVS2EContext *cae = avctx->priv_data;
66  int bit_depth, code;
67 
68  bit_depth = avctx->pix_fmt == AV_PIX_FMT_YUV420P ? 8 : 10;
69 
70  /* get API handler */
71  cae->api = xavs2_api_get(bit_depth);
72  if (!cae->api) {
73  av_log(avctx, AV_LOG_ERROR, "Failed to get xavs2 api context\n");
74  return AVERROR_EXTERNAL;
75  }
76 
77  cae->param = cae->api->opt_alloc();
78  if (!cae->param) {
79  av_log(avctx, AV_LOG_ERROR, "Failed to alloc xavs2 parameters\n");
80  return AVERROR(ENOMEM);
81  }
82 
83  xavs2_opt_set2("Width", "%d", avctx->width);
84  xavs2_opt_set2("Height", "%d", avctx->height);
85  xavs2_opt_set2("BFrames", "%d", avctx->max_b_frames);
86  xavs2_opt_set2("BitDepth", "%d", bit_depth);
87  xavs2_opt_set2("Log", "%d", cae->log_level);
88  xavs2_opt_set2("Preset", "%d", cae->preset_level);
89 
90  xavs2_opt_set2("IntraPeriodMax", "%d", avctx->gop_size);
91  xavs2_opt_set2("IntraPeriodMin", "%d", avctx->gop_size);
92 
93  xavs2_opt_set2("ThreadFrames", "%d", avctx->thread_count);
94  xavs2_opt_set2("ThreadRows", "%d", cae->lcu_row_threads);
95 
96  xavs2_opt_set2("OpenGOP", "%d", !(avctx->flags & AV_CODEC_FLAG_CLOSED_GOP));
97 
98  {
99  const AVDictionaryEntry *en = NULL;
100  while ((en = av_dict_iterate(cae->xavs2_opts, en)))
101  xavs2_opt_set2(en->key, "%s", en->value);
102  }
103 
104  /* Rate control */
105  if (avctx->bit_rate > 0) {
106  xavs2_opt_set2("RateControl", "%d", 1);
107  xavs2_opt_set2("TargetBitRate", "%"PRId64"", avctx->bit_rate);
108  xavs2_opt_set2("InitialQP", "%d", cae->initial_qp);
109  xavs2_opt_set2("MaxQP", "%d", avctx->qmax >= 0 ? avctx->qmax : cae->max_qp);
110  xavs2_opt_set2("MinQP", "%d", avctx->qmin >= 0 ? avctx->qmin : cae->min_qp);
111  } else {
112  xavs2_opt_set2("InitialQP", "%d", cae->qp);
113  }
114 
115  ff_mpeg12_find_best_frame_rate(avctx->framerate, &code, NULL, NULL, 0);
116  xavs2_opt_set2("FrameRate", "%d", code);
117 
118  cae->encoder = cae->api->encoder_create(cae->param);
119 
120  if (!cae->encoder) {
121  av_log(avctx, AV_LOG_ERROR, "Failed to create xavs2 encoder instance.\n");
122  return AVERROR(EINVAL);
123  }
124 
125  return 0;
126 }
127 
128 static void xavs2_copy_frame_with_shift(xavs2_picture_t *pic, const AVFrame *frame, const int shift_in)
129 {
130  uint16_t *p_plane;
131  uint8_t *p_buffer;
132  int plane;
133  int hIdx;
134  int wIdx;
135 
136  for (plane = 0; plane < 3; plane++) {
137  p_plane = (uint16_t *)pic->img.img_planes[plane];
138  p_buffer = frame->data[plane];
139  for (hIdx = 0; hIdx < pic->img.i_lines[plane]; hIdx++) {
140  memset(p_plane, 0, pic->img.i_stride[plane]);
141  for (wIdx = 0; wIdx < pic->img.i_width[plane]; wIdx++) {
142  p_plane[wIdx] = p_buffer[wIdx] << shift_in;
143  }
144  p_plane += pic->img.i_stride[plane];
145  p_buffer += frame->linesize[plane];
146  }
147  }
148 }
149 
150 static void xavs2_copy_frame(xavs2_picture_t *pic, const AVFrame *frame)
151 {
152  uint8_t *p_plane;
153  uint8_t *p_buffer;
154  int plane;
155  int hIdx;
156  int stride;
157 
158  for (plane = 0; plane < 3; plane++) {
159  p_plane = pic->img.img_planes[plane];
160  p_buffer = frame->data[plane];
161  stride = pic->img.i_width[plane] * pic->img.in_sample_size;
162  for (hIdx = 0; hIdx < pic->img.i_lines[plane]; hIdx++) {
163  memcpy(p_plane, p_buffer, stride);
164  p_plane += pic->img.i_stride[plane];
165  p_buffer += frame->linesize[plane];
166  }
167  }
168 }
169 
170 static int xavs2_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
171  const AVFrame *frame, int *got_packet)
172 {
173  XAVS2EContext *cae = avctx->priv_data;
174  xavs2_picture_t pic;
175  int ret;
176 
177  /* create the XAVS2 video encoder */
178  /* read frame data and send to the XAVS2 video encoder */
179  if (cae->api->encoder_get_buffer(cae->encoder, &pic) < 0) {
180  av_log(avctx, AV_LOG_ERROR, "Failed to get xavs2 frame buffer\n");
181  return AVERROR_EXTERNAL;
182  }
183  if (frame) {
184  switch (frame->format) {
185  case AV_PIX_FMT_YUV420P:
186  if (pic.img.in_sample_size == pic.img.enc_sample_size) {
187  xavs2_copy_frame(&pic, frame);
188  } else {
189  const int shift_in = atoi(cae->api->opt_get(cae->param, "SampleShift"));
190  xavs2_copy_frame_with_shift(&pic, frame, shift_in);
191  }
192  break;
193  case AV_PIX_FMT_YUV420P10:
194  if (pic.img.in_sample_size == pic.img.enc_sample_size) {
195  xavs2_copy_frame(&pic, frame);
196  break;
197  }
198  default:
199  av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format\n");
200  return AVERROR(EINVAL);
201  break;
202  }
203 
204  pic.i_state = 0;
205  pic.i_pts = frame->pts;
206  pic.i_type = XAVS2_TYPE_AUTO;
207 
208  ret = cae->api->encoder_encode(cae->encoder, &pic, &cae->packet);
209 
210  if (ret) {
211  av_log(avctx, AV_LOG_ERROR, "Encoding error occurred.\n");
212  return AVERROR_EXTERNAL;
213  }
214 
215  } else {
216  cae->api->encoder_encode(cae->encoder, NULL, &cae->packet);
217  }
218 
219  if ((cae->packet.len) && (cae->packet.state != XAVS2_STATE_FLUSH_END)) {
220  if ((ret = ff_get_encode_buffer(avctx, pkt, cae->packet.len, 0)) < 0) {
221  cae->api->encoder_packet_unref(cae->encoder, &cae->packet);
222  return ret;
223  }
224 
225  pkt->pts = cae->packet.pts;
226  pkt->dts = cae->packet.dts;
227 
228  if (cae->packet.type == XAVS2_TYPE_IDR ||
229  cae->packet.type == XAVS2_TYPE_I ||
230  cae->packet.type == XAVS2_TYPE_KEYFRAME) {
231  pkt->flags |= AV_PKT_FLAG_KEY;
232  }
233 
234  memcpy(pkt->data, cae->packet.stream, cae->packet.len);
235 
236  cae->api->encoder_packet_unref(cae->encoder, &cae->packet);
237 
238  *got_packet = 1;
239  } else {
240  *got_packet = 0;
241  }
242 
243  return 0;
244 }
245 
246 static av_cold int xavs2_close(AVCodecContext *avctx)
247 {
248  XAVS2EContext *cae = avctx->priv_data;
249  /* destroy the encoder */
250  if (cae->api) {
251  cae->api->encoder_destroy(cae->encoder);
252 
253  if (cae->param) {
254  cae->api->opt_destroy(cae->param);
255  }
256  }
257  return 0;
258 }
259 
260 #define OFFSET(x) offsetof(XAVS2EContext, x)
261 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
262 
263 static const AVOption options[] = {
264  { "lcu_row_threads" , "number of parallel threads for rows" , OFFSET(lcu_row_threads) , AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, VE },
265  { "initial_qp" , "Quantization initial parameter" , OFFSET(initial_qp) , AV_OPT_TYPE_INT, {.i64 = 34 }, 1, 63, VE },
266  { "qp" , "Quantization parameter" , OFFSET(qp) , AV_OPT_TYPE_INT, {.i64 = 34 }, 1, 63, VE },
267  { "max_qp" , "max qp for rate control" , OFFSET(max_qp) , AV_OPT_TYPE_INT, {.i64 = 55 }, 0, 63, VE },
268  { "min_qp" , "min qp for rate control" , OFFSET(min_qp) , AV_OPT_TYPE_INT, {.i64 = 20 }, 0, 63, VE },
269  { "speed_level" , "Speed level, higher is better but slower", OFFSET(preset_level) , AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 9, VE },
270  { "log_level" , "log level: -1: none, 0: error, 1: warning, 2: info, 3: debug", OFFSET(log_level) , AV_OPT_TYPE_INT, {.i64 = 0 }, -1, 3, VE },
271  { "xavs2-params" , "set the xavs2 configuration using a :-separated list of key=value parameters", OFFSET(xavs2_opts), AV_OPT_TYPE_DICT, { 0 }, 0, 0, VE },
272  { NULL },
273 };
274 
275 static const AVClass libxavs2 = {
276  .class_name = "XAVS2EContext",
277  .item_name = av_default_item_name,
278  .option = options,
279  .version = LIBAVUTIL_VERSION_INT,
280 };
281 
282 static const FFCodecDefault xavs2_defaults[] = {
283  { "b", "0" },
284  { "g", "48"},
285  { "bf", "7" },
286  { NULL },
287 };
288 
289 const FFCodec ff_libxavs2_encoder = {
290  .p.name = "libxavs2",
291  CODEC_LONG_NAME("libxavs2 AVS2-P2/IEEE1857.4"),
292  .p.type = AVMEDIA_TYPE_VIDEO,
293  .p.id = AV_CODEC_ID_AVS2,
294  .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
295  AV_CODEC_CAP_OTHER_THREADS,
296  .priv_data_size = sizeof(XAVS2EContext),
297  .init = xavs2_init,
298  FF_CODEC_ENCODE_CB(xavs2_encode_frame),
299  .close = xavs2_close,
300  .caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE |
301  FF_CODEC_CAP_AUTO_THREADS,
302  .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
303  AV_PIX_FMT_NONE },
304  .color_ranges = AVCOL_RANGE_MPEG,
305  .p.priv_class = &libxavs2,
306  .defaults = xavs2_defaults,
307  .p.wrapper_name = "libxavs2",
308 } ;
xavs2_copy_frame
static void xavs2_copy_frame(xavs2_picture_t *pic, const AVFrame *frame)
Definition: libxavs2.c:150
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
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
XAVS2EContext::initial_qp
int initial_qp
Definition: libxavs2.c:46
XAVS2EContext::min_qp
int min_qp
Definition: libxavs2.c:49
XAVS2EContext::lcu_row_threads
int lcu_row_threads
Definition: libxavs2.c:45
xavs2_copy_frame_with_shift
static void xavs2_copy_frame_with_shift(xavs2_picture_t *pic, const AVFrame *frame, const int shift_in)
Definition: libxavs2.c:128
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:389
AVPacket::data
uint8_t * data
Definition: packet.h:539
AVOption
AVOption.
Definition: opt.h:429
encode.h
AV_CODEC_ID_AVS2
@ AV_CODEC_ID_AVS2
Definition: codec_id.h:248
XAVS2EContext::xavs2_opts
AVDictionary * xavs2_opts
Definition: libxavs2.c:54
AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:502
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:35
FFCodec
Definition: codec_internal.h:127
libxavs2
static const AVClass libxavs2
Definition: libxavs2.c:275
AVDictionary
Definition: dict.c:34
XAVS2EContext::encoder
void * encoder
Definition: libxavs2.c:53
AVCodecContext::qmax
int qmax
maximum quantizer
Definition: avcodec.h:1273
bit_depth
static void bit_depth(AudioStatsContext *s, const uint64_t *const mask, uint8_t *depth)
Definition: af_astats.c:246
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:594
ff_mpeg12_find_best_frame_rate
void ff_mpeg12_find_best_frame_rate(AVRational frame_rate, int *code, int *ext_n, int *ext_d, int nonstandard)
Definition: mpeg12framerate.c:44
AVCodecContext::framerate
AVRational framerate
Definition: avcodec.h:566
FFCodecDefault
Definition: codec_internal.h:97
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:131
XAVS2EContext::log_level
int log_level
Definition: libxavs2.c:51
AVCodecContext::thread_count
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:1593
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:508
XAVS2EContext::api
const xavs2_api_t * api
Definition: libxavs2.c:59
FF_CODEC_ENCODE_CB
#define FF_CODEC_ENCODE_CB(func)
Definition: codec_internal.h:320
mpeg12.h
pkt
AVPacket * pkt
Definition: movenc.c:60
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:209
av_cold
#define av_cold
Definition: attributes.h:90
XAVS2EContext
Definition: libxavs2.c:42
AVDictionaryEntry::key
char * key
Definition: dict.h:90
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:124
XAVS2EContext::packet
xavs2_outpacket_t packet
Definition: libxavs2.c:56
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:73
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:296
XAVS2EContext::preset_level
int preset_level
Definition: libxavs2.c:50
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:75
NULL
#define NULL
Definition: coverity.c:32
xavs2_encode_frame
static int xavs2_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
Definition: libxavs2.c:170
XAVS2EContext::qp
int qp
Definition: libxavs2.c:47
xavs2_init
static av_cold int xavs2_init(AVCodecContext *avctx)
Definition: libxavs2.c:63
VE
#define VE
Definition: libxavs2.c:261
AVCodecContext::bit_rate
int64_t bit_rate
the average bitrate
Definition: avcodec.h:501
AV_OPT_TYPE_DICT
@ AV_OPT_TYPE_DICT
Underlying C type is AVDictionary*.
Definition: opt.h:290
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts.c:368
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
ff_libxavs2_encoder
const FFCodec ff_libxavs2_encoder
Definition: libxavs2.c:289
AVCodecContext::gop_size
int gop_size
the number of pictures in a group of pictures, or 0 for intra_only
Definition: avcodec.h:1037
codec_internal.h
for
for(k=2;k<=8;++k)
Definition: h264pred_template.c:425
xavs2_opt_set2
#define xavs2_opt_set2(name, format,...)
Definition: libxavs2.c:32
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:538
AVERROR_EXTERNAL
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:59
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:545
XAVS2EContext::param
xavs2_param_t * param
Definition: libxavs2.c:57
XAVS2EContext::max_qp
int max_qp
Definition: libxavs2.c:48
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:532
code
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some it can consider them to be part of the FIFO and delay acknowledging a status change accordingly Example code
Definition: filter_design.txt:178
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:194
AVCodecContext::height
int height
Definition: avcodec.h:624
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:663
AVCOL_RANGE_MPEG
@ AVCOL_RANGE_MPEG
Narrow or limited range content.
Definition: pixfmt.h:700
OFFSET
#define OFFSET(x)
Definition: libxavs2.c:260
stride
#define stride
Definition: h264pred_template.c:537
AV_CODEC_FLAG_CLOSED_GOP
#define AV_CODEC_FLAG_CLOSED_GOP
Definition: avcodec.h:352
ret
ret
Definition: filter_design.txt:187
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:80
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
AVCodecContext
main external API structure.
Definition: avcodec.h:451
ff_get_encode_buffer
int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)
Get a buffer for a packet.
Definition: encode.c:106
AVCodecContext::qmin
int qmin
minimum quantizer
Definition: avcodec.h:1266
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
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:76
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVCodecContext::max_b_frames
int max_b_frames
maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 re...
Definition: avcodec.h:801
FF_CODEC_CAP_AUTO_THREADS
#define FF_CODEC_CAP_AUTO_THREADS
Codec handles avctx->thread_count == 0 (auto) internally.
Definition: codec_internal.h:73
AVDictionaryEntry
Definition: dict.h:89
AVPacket
This structure stores compressed data.
Definition: packet.h:516
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:478
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:624
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVDictionaryEntry::value
char * value
Definition: dict.h:91
avstring.h
xavs2_defaults
static const FFCodecDefault xavs2_defaults[]
Definition: libxavs2.c:282
av_dict_iterate
const AVDictionaryEntry * av_dict_iterate(const AVDictionary *m, const AVDictionaryEntry *prev)
Iterate over a dictionary.
Definition: dict.c:44
options
static const AVOption options[]
Definition: libxavs2.c:263
xavs2_close
static av_cold int xavs2_close(AVCodecContext *avctx)
Definition: libxavs2.c:246
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