FFmpeg
frame_thread_encoder.c
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1 /*
2  * Copyright (c) 2012 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <stdatomic.h>
22 
23 #include "frame_thread_encoder.h"
24 
25 #include "libavutil/avassert.h"
26 #include "libavutil/cpu.h"
27 #include "libavutil/imgutils.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/thread.h"
30 #include "avcodec.h"
31 #include "codec_internal.h"
32 #include "internal.h"
33 #include "pthread_internal.h"
34 #include "thread.h"
35 
36 #define MAX_THREADS 64
37 /* There can be as many as MAX_THREADS + 1 outstanding tasks.
38  * An additional + 1 is needed so that one can distinguish
39  * the case of zero and MAX_THREADS + 1 outstanding tasks modulo
40  * the number of buffers. */
41 #define BUFFER_SIZE (MAX_THREADS + 2)
42 
43 typedef struct{
47  int finished;
48 } Task;
49 
50 typedef struct{
53 
54  pthread_mutex_t task_fifo_mutex; /* Used to guard (next_)task_index */
56 
57  unsigned pthread_init_cnt;
58  unsigned max_tasks;
59  Task tasks[BUFFER_SIZE];
60  pthread_mutex_t finished_task_mutex; /* Guards tasks[i].finished */
62 
63  unsigned next_task_index;
64  unsigned task_index;
66 
70 
71 #define OFF(member) offsetof(ThreadContext, member)
72 DEFINE_OFFSET_ARRAY(ThreadContext, thread_ctx, pthread_init_cnt,
73  (OFF(buffer_mutex), OFF(task_fifo_mutex), OFF(finished_task_mutex)),
74  (OFF(task_fifo_cond), OFF(finished_task_cond)));
75 #undef OFF
76 
77 static void * attribute_align_arg worker(void *v){
78  AVCodecContext *avctx = v;
80 
81  while (!atomic_load(&c->exit)) {
82  int got_packet = 0, ret;
83  AVPacket *pkt;
84  AVFrame *frame;
85  Task *task;
86  unsigned task_index;
87 
88  pthread_mutex_lock(&c->task_fifo_mutex);
89  while (c->next_task_index == c->task_index || atomic_load(&c->exit)) {
90  if (atomic_load(&c->exit)) {
91  pthread_mutex_unlock(&c->task_fifo_mutex);
92  goto end;
93  }
94  pthread_cond_wait(&c->task_fifo_cond, &c->task_fifo_mutex);
95  }
96  task_index = c->next_task_index;
97  c->next_task_index = (c->next_task_index + 1) % c->max_tasks;
98  pthread_mutex_unlock(&c->task_fifo_mutex);
99  /* The main thread ensures that any two outstanding tasks have
100  * different indices, ergo each worker thread owns its element
101  * of c->tasks with the exception of finished, which is shared
102  * with the main thread and guarded by finished_task_mutex. */
103  task = &c->tasks[task_index];
104  frame = task->indata;
105  pkt = task->outdata;
106 
107  ret = ffcodec(avctx->codec)->cb.encode(avctx, pkt, frame, &got_packet);
108  if(got_packet) {
109  int ret2 = av_packet_make_refcounted(pkt);
110  if (ret >= 0 && ret2 < 0)
111  ret = ret2;
112  pkt->pts = pkt->dts = frame->pts;
113  } else {
114  pkt->data = NULL;
115  pkt->size = 0;
116  }
117  pthread_mutex_lock(&c->buffer_mutex);
119  pthread_mutex_unlock(&c->buffer_mutex);
120  pthread_mutex_lock(&c->finished_task_mutex);
121  task->return_code = ret;
122  task->finished = 1;
123  pthread_cond_signal(&c->finished_task_cond);
124  pthread_mutex_unlock(&c->finished_task_mutex);
125  }
126 end:
127  pthread_mutex_lock(&c->buffer_mutex);
128  avcodec_close(avctx);
129  pthread_mutex_unlock(&c->buffer_mutex);
130  av_freep(&avctx);
131  return NULL;
132 }
133 
135 {
136  int i=0;
137  ThreadContext *c;
138  AVCodecContext *thread_avctx = NULL;
139  int ret;
140 
141  if( !(avctx->thread_type & FF_THREAD_FRAME)
143  return 0;
144 
145  if( !avctx->thread_count
146  && avctx->codec_id == AV_CODEC_ID_MJPEG
147  && !(avctx->flags & AV_CODEC_FLAG_QSCALE)) {
148  av_log(avctx, AV_LOG_DEBUG,
149  "Forcing thread count to 1 for MJPEG encoding, use -thread_type slice "
150  "or a constant quantizer if you want to use multiple cpu cores\n");
151  avctx->thread_count = 1;
152  }
153  if( avctx->thread_count > 1
154  && avctx->codec_id == AV_CODEC_ID_MJPEG
155  && !(avctx->flags & AV_CODEC_FLAG_QSCALE))
156  av_log(avctx, AV_LOG_WARNING,
157  "MJPEG CBR encoding works badly with frame multi-threading, consider "
158  "using -threads 1, -thread_type slice or a constant quantizer.\n");
159 
160  if (avctx->codec_id == AV_CODEC_ID_HUFFYUV ||
161  avctx->codec_id == AV_CODEC_ID_FFVHUFF) {
162  int warn = 0;
163  int64_t tmp;
164 
165  if (avctx->flags & AV_CODEC_FLAG_PASS1)
166  warn = 1;
167  else if (av_opt_get_int(avctx->priv_data, "context", 0, &tmp) >= 0 &&
168  tmp > 0) {
169  warn = av_opt_get_int(avctx->priv_data, "non_deterministic", 0, &tmp) < 0
170  || !tmp;
171  }
172  // huffyuv does not support these with multiple frame threads currently
173  if (warn) {
174  av_log(avctx, AV_LOG_WARNING,
175  "Forcing thread count to 1 for huffyuv encoding with first pass or context 1\n");
176  avctx->thread_count = 1;
177  }
178  }
179 
180  if(!avctx->thread_count) {
181  avctx->thread_count = av_cpu_count();
182  avctx->thread_count = FFMIN(avctx->thread_count, MAX_THREADS);
183  }
184 
185  if(avctx->thread_count <= 1)
186  return 0;
187 
188  if(avctx->thread_count > MAX_THREADS)
189  return AVERROR(EINVAL);
190 
193  if(!c)
194  return AVERROR(ENOMEM);
195 
196  c->parent_avctx = avctx;
197 
198  ret = ff_pthread_init(c, thread_ctx_offsets);
199  if (ret < 0)
200  goto fail;
201  atomic_init(&c->exit, 0);
202 
203  c->max_tasks = avctx->thread_count + 2;
204  for (unsigned j = 0; j < c->max_tasks; j++) {
205  if (!(c->tasks[j].indata = av_frame_alloc()) ||
206  !(c->tasks[j].outdata = av_packet_alloc())) {
207  ret = AVERROR(ENOMEM);
208  goto fail;
209  }
210  }
211 
212  for(i=0; i<avctx->thread_count ; i++){
213  void *tmpv;
214  thread_avctx = avcodec_alloc_context3(avctx->codec);
215  if (!thread_avctx) {
216  ret = AVERROR(ENOMEM);
217  goto fail;
218  }
219  tmpv = thread_avctx->priv_data;
220  *thread_avctx = *avctx;
221  thread_avctx->priv_data = tmpv;
222  thread_avctx->internal = NULL;
223  thread_avctx->hw_frames_ctx = NULL;
224  ret = av_opt_copy(thread_avctx, avctx);
225  if (ret < 0)
226  goto fail;
227  if (avctx->codec->priv_class) {
228  ret = av_opt_copy(thread_avctx->priv_data, avctx->priv_data);
229  if (ret < 0)
230  goto fail;
231  }
232  thread_avctx->thread_count = 1;
233  thread_avctx->active_thread_type &= ~FF_THREAD_FRAME;
234 
235  if ((ret = avcodec_open2(thread_avctx, avctx->codec, NULL)) < 0)
236  goto fail;
237  av_assert0(!thread_avctx->internal->frame_thread_encoder);
238  thread_avctx->internal->frame_thread_encoder = c;
239  if ((ret = pthread_create(&c->worker[i], NULL, worker, thread_avctx))) {
240  ret = AVERROR(ret);
241  goto fail;
242  }
243  }
244 
246 
247  return 0;
248 fail:
249  avcodec_close(thread_avctx);
250  av_freep(&thread_avctx);
251  avctx->thread_count = i;
252  av_log(avctx, AV_LOG_ERROR, "ff_frame_thread_encoder_init failed\n");
254  return ret;
255 }
256 
258 {
260 
261  /* In case initializing the mutexes/condition variables failed,
262  * they must not be used. In this case the thread_count is zero
263  * as no thread has been initialized yet. */
264  if (avctx->thread_count > 0) {
265  pthread_mutex_lock(&c->task_fifo_mutex);
266  atomic_store(&c->exit, 1);
267  pthread_cond_broadcast(&c->task_fifo_cond);
268  pthread_mutex_unlock(&c->task_fifo_mutex);
269 
270  for (int i = 0; i < avctx->thread_count; i++)
271  pthread_join(c->worker[i], NULL);
272  }
273 
274  for (unsigned i = 0; i < c->max_tasks; i++) {
275  av_frame_free(&c->tasks[i].indata);
276  av_packet_free(&c->tasks[i].outdata);
277  }
278 
279  ff_pthread_free(c, thread_ctx_offsets);
281 }
282 
284  AVFrame *frame, int *got_packet_ptr)
285 {
287  Task *outtask;
288 
289  av_assert1(!*got_packet_ptr);
290 
291  if(frame){
292  av_frame_move_ref(c->tasks[c->task_index].indata, frame);
293 
294  pthread_mutex_lock(&c->task_fifo_mutex);
295  c->task_index = (c->task_index + 1) % c->max_tasks;
296  pthread_cond_signal(&c->task_fifo_cond);
297  pthread_mutex_unlock(&c->task_fifo_mutex);
298  }
299 
300  outtask = &c->tasks[c->finished_task_index];
301  pthread_mutex_lock(&c->finished_task_mutex);
302  /* The access to task_index in the following code is ok,
303  * because it is only ever changed by the main thread. */
304  if (c->task_index == c->finished_task_index ||
305  (frame && !outtask->finished &&
306  (c->task_index - c->finished_task_index + c->max_tasks) % c->max_tasks <= avctx->thread_count)) {
307  pthread_mutex_unlock(&c->finished_task_mutex);
308  return 0;
309  }
310  while (!outtask->finished) {
311  pthread_cond_wait(&c->finished_task_cond, &c->finished_task_mutex);
312  }
313  pthread_mutex_unlock(&c->finished_task_mutex);
314  /* We now own outtask completely: No worker thread touches it any more,
315  * because there is no outstanding task with this index. */
316  outtask->finished = 0;
317  av_packet_move_ref(pkt, outtask->outdata);
318  if(pkt->data)
319  *got_packet_ptr = 1;
320  c->finished_task_index = (c->finished_task_index + 1) % c->max_tasks;
321 
322  return outtask->return_code;
323 }
avcodec_close
av_cold int avcodec_close(AVCodecContext *avctx)
Close a given AVCodecContext and free all the data associated with it (but not the AVCodecContext its...
Definition: avcodec.c:440
pthread_mutex_t
_fmutex pthread_mutex_t
Definition: os2threads.h:53
pthread_join
static av_always_inline int pthread_join(pthread_t thread, void **value_ptr)
Definition: os2threads.h:94
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
atomic_store
#define atomic_store(object, desired)
Definition: stdatomic.h:85
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
AV_CODEC_ID_HUFFYUV
@ AV_CODEC_ID_HUFFYUV
Definition: codec_id.h:75
Task::finished
int finished
Definition: frame_thread_encoder.c:47
AVCodec::priv_class
const AVClass * priv_class
AVClass for the private context.
Definition: codec.h:228
thread.h
AV_CODEC_FLAG_QSCALE
#define AV_CODEC_FLAG_QSCALE
Use fixed qscale.
Definition: avcodec.h:216
BUFFER_SIZE
#define BUFFER_SIZE
Definition: frame_thread_encoder.c:41
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:111
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:28
AVCodec::capabilities
int capabilities
Codec capabilities.
Definition: codec.h:215
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:374
AVCodecInternal::frame_thread_encoder
void * frame_thread_encoder
Definition: internal.h:96
atomic_int
intptr_t atomic_int
Definition: stdatomic.h:55
FFCodec::encode
int(* encode)(struct AVCodecContext *avctx, struct AVPacket *avpkt, const struct AVFrame *frame, int *got_packet_ptr)
Encode data to an AVPacket.
Definition: codec_internal.h:207
ThreadContext::buffer_mutex
pthread_mutex_t buffer_mutex
Definition: frame_thread_encoder.c:52
thread.h
ff_pthread_free
av_cold void ff_pthread_free(void *obj, const unsigned offsets[])
Definition: pthread.c:94
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:73
AVCodecContext::codec
const struct AVCodec * codec
Definition: avcodec.h:398
fail
#define fail()
Definition: checkasm.h:131
AVCodecContext::thread_count
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:1463
ThreadContext::parent_avctx
AVCodecContext * parent_avctx
Definition: frame_thread_encoder.c:51
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:469
MAX_THREADS
#define MAX_THREADS
Definition: frame_thread_encoder.c:36
Task::outdata
AVPacket * outdata
Definition: frame_thread_encoder.c:45
ThreadContext::finished_task_index
unsigned finished_task_index
Definition: frame_thread_encoder.c:65
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:99
avassert.h
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
frame_thread_encoder.h
av_cold
#define av_cold
Definition: attributes.h:90
ff_frame_thread_encoder_init
av_cold int ff_frame_thread_encoder_init(AVCodecContext *avctx)
Initialize frame thread encoder.
Definition: frame_thread_encoder.c:134
avcodec_alloc_context3
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:149
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AVCodecContext::thread_type
int thread_type
Which multithreading methods to use.
Definition: avcodec.h:1473
ThreadContext::exit
atomic_int exit
Definition: frame_thread_encoder.c:68
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
FFCodec::cb
union FFCodec::@44 cb
DEFINE_OFFSET_ARRAY
DEFINE_OFFSET_ARRAY(ThreadContext, thread_ctx, pthread_init_cnt,(OFF(buffer_mutex), OFF(task_fifo_mutex), OFF(finished_task_mutex)),(OFF(task_fifo_cond), OFF(finished_task_cond)))
AV_CODEC_ID_FFVHUFF
@ AV_CODEC_ID_FFVHUFF
Definition: codec_id.h:117
atomic_load
#define atomic_load(object)
Definition: stdatomic.h:93
pthread_cond_broadcast
static av_always_inline int pthread_cond_broadcast(pthread_cond_t *cond)
Definition: os2threads.h:162
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:399
pthread_create
static av_always_inline int pthread_create(pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine)(void *), void *arg)
Definition: os2threads.h:80
ff_thread_video_encode_frame
int ff_thread_video_encode_frame(AVCodecContext *avctx, AVPacket *pkt, AVFrame *frame, int *got_packet_ptr)
Definition: frame_thread_encoder.c:283
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:113
ThreadContext::task_fifo_mutex
pthread_mutex_t task_fifo_mutex
Definition: frame_thread_encoder.c:54
NULL
#define NULL
Definition: coverity.c:32
AVCodecContext::internal
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:424
pthread_internal.h
avcodec_open2
int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: avcodec.c:115
av_opt_get_int
int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_val)
Definition: opt.c:978
av_packet_move_ref
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:479
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
pthread_mutex_unlock
#define pthread_mutex_unlock(a)
Definition: ffprobe.c:77
av_cpu_count
int av_cpu_count(void)
Definition: cpu.c:195
Task::indata
AVFrame * indata
Definition: frame_thread_encoder.c:44
AVPacket::size
int size
Definition: packet.h:375
codec_internal.h
cpu.h
ThreadContext::next_task_index
unsigned next_task_index
Definition: frame_thread_encoder.c:63
ffcodec
static const av_always_inline FFCodec * ffcodec(const AVCodec *codec)
Definition: codec_internal.h:273
ThreadContext::task_index
unsigned task_index
Definition: frame_thread_encoder.c:64
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:373
av_packet_make_refcounted
int av_packet_make_refcounted(AVPacket *pkt)
Ensure the data described by a given packet is reference counted.
Definition: avpacket.c:485
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:62
pthread_t
Definition: os2threads.h:44
FF_THREAD_FRAME
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:1474
AV_CODEC_ID_MJPEG
@ AV_CODEC_ID_MJPEG
Definition: codec_id.h:57
ThreadContext::finished_task_cond
pthread_cond_t finished_task_cond
Definition: frame_thread_encoder.c:61
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
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
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
av_frame_move_ref
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:506
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:477
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:264
pthread_cond_t
Definition: os2threads.h:58
worker
static void *attribute_align_arg worker(void *v)
Definition: frame_thread_encoder.c:77
OFF
#define OFF(member)
Definition: frame_thread_encoder.c:71
AVCodecContext::hw_frames_ctx
AVBufferRef * hw_frames_ctx
A reference to the AVHWFramesContext describing the input (for encoding) or output (decoding) frames.
Definition: avcodec.h:1881
avcodec.h
ThreadContext::finished_task_mutex
pthread_mutex_t finished_task_mutex
Definition: frame_thread_encoder.c:60
ret
ret
Definition: filter_design.txt:187
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
pthread_cond_signal
static av_always_inline int pthread_cond_signal(pthread_cond_t *cond)
Definition: os2threads.h:152
AVCodecContext
main external API structure.
Definition: avcodec.h:389
AVCodecContext::active_thread_type
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:1482
ThreadContext
Definition: frame_thread_encoder.c:50
ThreadContext::pthread_init_cnt
unsigned pthread_init_cnt
Definition: frame_thread_encoder.c:57
ff_frame_thread_encoder_free
av_cold void ff_frame_thread_encoder_free(AVCodecContext *avctx)
Definition: frame_thread_encoder.c:257
ff_pthread_init
av_cold int ff_pthread_init(void *obj, const unsigned offsets[])
Initialize/destroy a list of mutexes/conditions contained in a structure.
Definition: pthread.c:107
pthread_cond_wait
static av_always_inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
Definition: os2threads.h:192
ThreadContext::max_tasks
unsigned max_tasks
Definition: frame_thread_encoder.c:58
av_opt_copy
int av_opt_copy(void *dst, const void *src)
Copy options from src object into dest object.
Definition: opt.c:1884
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:416
AVPacket
This structure stores compressed data.
Definition: packet.h:351
Task::return_code
int return_code
Definition: frame_thread_encoder.c:46
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
Task
Definition: frame_thread_encoder.c:43
imgutils.h
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
atomic_init
#define atomic_init(obj, value)
Definition: stdatomic.h:33
ThreadContext::task_fifo_cond
pthread_cond_t task_fifo_cond
Definition: frame_thread_encoder.c:55
AV_CODEC_FLAG_PASS1
#define AV_CODEC_FLAG_PASS1
Use internal 2pass ratecontrol in first pass mode.
Definition: avcodec.h:237
pthread_mutex_lock
#define pthread_mutex_lock(a)
Definition: ffprobe.c:73