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 "internal.h"
32 #include "pthread_internal.h"
33 #include "thread.h"
34 
35 #define MAX_THREADS 64
36 /* There can be as many as MAX_THREADS + 1 outstanding tasks.
37  * An additional + 1 is needed so that one can distinguish
38  * the case of zero and MAX_THREADS + 1 outstanding tasks modulo
39  * the number of buffers. */
40 #define BUFFER_SIZE (MAX_THREADS + 2)
41 
42 typedef struct{
46  int finished;
47 } Task;
48 
49 typedef struct{
52 
53  pthread_mutex_t task_fifo_mutex; /* Used to guard (next_)task_index */
55 
56  unsigned pthread_init_cnt;
57  unsigned max_tasks;
58  Task tasks[BUFFER_SIZE];
59  pthread_mutex_t finished_task_mutex; /* Guards tasks[i].finished */
61 
62  unsigned next_task_index;
63  unsigned task_index;
65 
69 
70 #define OFF(member) offsetof(ThreadContext, member)
71 DEFINE_OFFSET_ARRAY(ThreadContext, thread_ctx, pthread_init_cnt,
72  (OFF(buffer_mutex), OFF(task_fifo_mutex), OFF(finished_task_mutex)),
73  (OFF(task_fifo_cond), OFF(finished_task_cond)));
74 #undef OFF
75 
76 static void * attribute_align_arg worker(void *v){
77  AVCodecContext *avctx = v;
79 
80  while (!atomic_load(&c->exit)) {
81  int got_packet = 0, ret;
82  AVPacket *pkt;
83  AVFrame *frame;
84  Task *task;
85  unsigned task_index;
86 
87  pthread_mutex_lock(&c->task_fifo_mutex);
88  while (c->next_task_index == c->task_index || atomic_load(&c->exit)) {
89  if (atomic_load(&c->exit)) {
90  pthread_mutex_unlock(&c->task_fifo_mutex);
91  goto end;
92  }
93  pthread_cond_wait(&c->task_fifo_cond, &c->task_fifo_mutex);
94  }
95  task_index = c->next_task_index;
96  c->next_task_index = (c->next_task_index + 1) % c->max_tasks;
97  pthread_mutex_unlock(&c->task_fifo_mutex);
98  /* The main thread ensures that any two outstanding tasks have
99  * different indices, ergo each worker thread owns its element
100  * of c->tasks with the exception of finished, which is shared
101  * with the main thread and guarded by finished_task_mutex. */
102  task = &c->tasks[task_index];
103  frame = task->indata;
104  pkt = task->outdata;
105 
106  ret = avctx->codec->encode2(avctx, pkt, frame, &got_packet);
107  if(got_packet) {
108  int ret2 = av_packet_make_refcounted(pkt);
109  if (ret >= 0 && ret2 < 0)
110  ret = ret2;
111  pkt->pts = pkt->dts = frame->pts;
112  } else {
113  pkt->data = NULL;
114  pkt->size = 0;
115  }
116  pthread_mutex_lock(&c->buffer_mutex);
118  pthread_mutex_unlock(&c->buffer_mutex);
119  pthread_mutex_lock(&c->finished_task_mutex);
120  task->return_code = ret;
121  task->finished = 1;
122  pthread_cond_signal(&c->finished_task_cond);
123  pthread_mutex_unlock(&c->finished_task_mutex);
124  }
125 end:
126  pthread_mutex_lock(&c->buffer_mutex);
127  avcodec_close(avctx);
128  pthread_mutex_unlock(&c->buffer_mutex);
129  av_freep(&avctx);
130  return NULL;
131 }
132 
134 {
135  int i=0;
136  ThreadContext *c;
137  AVCodecContext *thread_avctx = NULL;
138  int ret;
139 
140  if( !(avctx->thread_type & FF_THREAD_FRAME)
142  return 0;
143 
144  if( !avctx->thread_count
145  && avctx->codec_id == AV_CODEC_ID_MJPEG
146  && !(avctx->flags & AV_CODEC_FLAG_QSCALE)) {
147  av_log(avctx, AV_LOG_DEBUG,
148  "Forcing thread count to 1 for MJPEG encoding, use -thread_type slice "
149  "or a constant quantizer if you want to use multiple cpu cores\n");
150  avctx->thread_count = 1;
151  }
152  if( avctx->thread_count > 1
153  && avctx->codec_id == AV_CODEC_ID_MJPEG
154  && !(avctx->flags & AV_CODEC_FLAG_QSCALE))
155  av_log(avctx, AV_LOG_WARNING,
156  "MJPEG CBR encoding works badly with frame multi-threading, consider "
157  "using -threads 1, -thread_type slice or a constant quantizer.\n");
158 
159  if (avctx->codec_id == AV_CODEC_ID_HUFFYUV ||
160  avctx->codec_id == AV_CODEC_ID_FFVHUFF) {
161  int warn = 0;
162  int64_t tmp;
163 
164  if (avctx->flags & AV_CODEC_FLAG_PASS1)
165  warn = 1;
166  else if (av_opt_get_int(avctx->priv_data, "context", 0, &tmp) >= 0 &&
167  tmp > 0) {
168  warn = av_opt_get_int(avctx->priv_data, "non_deterministic", 0, &tmp) < 0
169  || !tmp;
170  }
171  // huffyuv does not support these with multiple frame threads currently
172  if (warn) {
173  av_log(avctx, AV_LOG_WARNING,
174  "Forcing thread count to 1 for huffyuv encoding with first pass or context 1\n");
175  avctx->thread_count = 1;
176  }
177  }
178 
179  if(!avctx->thread_count) {
180  avctx->thread_count = av_cpu_count();
181  avctx->thread_count = FFMIN(avctx->thread_count, MAX_THREADS);
182  }
183 
184  if(avctx->thread_count <= 1)
185  return 0;
186 
187  if(avctx->thread_count > MAX_THREADS)
188  return AVERROR(EINVAL);
189 
192  if(!c)
193  return AVERROR(ENOMEM);
194 
195  c->parent_avctx = avctx;
196 
197  ret = ff_pthread_init(c, thread_ctx_offsets);
198  if (ret < 0)
199  goto fail;
200  atomic_init(&c->exit, 0);
201 
202  c->max_tasks = avctx->thread_count + 2;
203  for (unsigned j = 0; j < c->max_tasks; j++) {
204  if (!(c->tasks[j].indata = av_frame_alloc()) ||
205  !(c->tasks[j].outdata = av_packet_alloc())) {
206  ret = AVERROR(ENOMEM);
207  goto fail;
208  }
209  }
210 
211  for(i=0; i<avctx->thread_count ; i++){
212  void *tmpv;
213  thread_avctx = avcodec_alloc_context3(avctx->codec);
214  if (!thread_avctx) {
215  ret = AVERROR(ENOMEM);
216  goto fail;
217  }
218  tmpv = thread_avctx->priv_data;
219  *thread_avctx = *avctx;
220  thread_avctx->priv_data = tmpv;
221  thread_avctx->internal = NULL;
222  thread_avctx->hw_frames_ctx = NULL;
223  ret = av_opt_copy(thread_avctx, avctx);
224  if (ret < 0)
225  goto fail;
226  if (avctx->codec->priv_class) {
227  ret = av_opt_copy(thread_avctx->priv_data, avctx->priv_data);
228  if (ret < 0)
229  goto fail;
230  }
231  thread_avctx->thread_count = 1;
232  thread_avctx->active_thread_type &= ~FF_THREAD_FRAME;
233 
234  if ((ret = avcodec_open2(thread_avctx, avctx->codec, NULL)) < 0)
235  goto fail;
236  av_assert0(!thread_avctx->internal->frame_thread_encoder);
237  thread_avctx->internal->frame_thread_encoder = c;
238  if ((ret = pthread_create(&c->worker[i], NULL, worker, thread_avctx))) {
239  ret = AVERROR(ret);
240  goto fail;
241  }
242  }
243 
245 
246  return 0;
247 fail:
248  avcodec_close(thread_avctx);
249  av_freep(&thread_avctx);
250  avctx->thread_count = i;
251  av_log(avctx, AV_LOG_ERROR, "ff_frame_thread_encoder_init failed\n");
253  return ret;
254 }
255 
257 {
259 
260  /* In case initializing the mutexes/condition variables failed,
261  * they must not be used. In this case the thread_count is zero
262  * as no thread has been initialized yet. */
263  if (avctx->thread_count > 0) {
264  pthread_mutex_lock(&c->task_fifo_mutex);
265  atomic_store(&c->exit, 1);
266  pthread_cond_broadcast(&c->task_fifo_cond);
267  pthread_mutex_unlock(&c->task_fifo_mutex);
268 
269  for (int i = 0; i < avctx->thread_count; i++)
270  pthread_join(c->worker[i], NULL);
271  }
272 
273  for (unsigned i = 0; i < c->max_tasks; i++) {
274  av_frame_free(&c->tasks[i].indata);
275  av_packet_free(&c->tasks[i].outdata);
276  }
277 
278  ff_pthread_free(c, thread_ctx_offsets);
280 }
281 
283  AVFrame *frame, int *got_packet_ptr)
284 {
286  Task *outtask;
287 
288  av_assert1(!*got_packet_ptr);
289 
290  if(frame){
291  av_frame_move_ref(c->tasks[c->task_index].indata, frame);
292 
293  pthread_mutex_lock(&c->task_fifo_mutex);
294  c->task_index = (c->task_index + 1) % c->max_tasks;
295  pthread_cond_signal(&c->task_fifo_cond);
296  pthread_mutex_unlock(&c->task_fifo_mutex);
297  }
298 
299  outtask = &c->tasks[c->finished_task_index];
300  pthread_mutex_lock(&c->finished_task_mutex);
301  /* The access to task_index in the following code is ok,
302  * because it is only ever changed by the main thread. */
303  if (c->task_index == c->finished_task_index ||
304  (frame && !outtask->finished &&
305  (c->task_index - c->finished_task_index + c->max_tasks) % c->max_tasks <= avctx->thread_count)) {
306  pthread_mutex_unlock(&c->finished_task_mutex);
307  return 0;
308  }
309  while (!outtask->finished) {
310  pthread_cond_wait(&c->finished_task_cond, &c->finished_task_mutex);
311  }
312  pthread_mutex_unlock(&c->finished_task_mutex);
313  /* We now own outtask completely: No worker thread touches it any more,
314  * because there is no outstanding task with this index. */
315  outtask->finished = 0;
316  av_packet_move_ref(pkt, outtask->outdata);
317  if(pkt->data)
318  *got_packet_ptr = 1;
319  c->finished_task_index = (c->finished_task_index + 1) % c->max_tasks;
320 
321  return outtask->return_code;
322 }
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:444
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:46
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:210
BUFFER_SIZE
#define BUFFER_SIZE
Definition: frame_thread_encoder.c:40
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:109
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:310
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:26
AVCodec::capabilities
int capabilities
Codec capabilities.
Definition: codec.h:221
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:373
AVCodecInternal::frame_thread_encoder
void * frame_thread_encoder
Definition: internal.h:167
atomic_int
intptr_t atomic_int
Definition: stdatomic.h:55
ThreadContext::buffer_mutex
pthread_mutex_t buffer_mutex
Definition: frame_thread_encoder.c:51
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:75
AVCodecContext::codec
const struct AVCodec * codec
Definition: avcodec.h:392
fail
#define fail()
Definition: checkasm.h:127
AVCodecContext::thread_count
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:1440
ThreadContext::parent_avctx
AVCodecContext * parent_avctx
Definition: frame_thread_encoder.c:50
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:463
MAX_THREADS
#define MAX_THREADS
Definition: frame_thread_encoder.c:35
Task::outdata
AVPacket * outdata
Definition: frame_thread_encoder.c:44
ThreadContext::finished_task_index
unsigned finished_task_index
Definition: frame_thread_encoder.c:64
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:97
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:133
avcodec_alloc_context3
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:141
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:1450
ThreadContext::exit
atomic_int exit
Definition: frame_thread_encoder.c:67
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
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:393
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:282
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:53
NULL
#define NULL
Definition: coverity.c:32
AVCodecContext::internal
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:418
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:137
av_opt_get_int
int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_val)
Definition: opt.c:915
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:474
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:68
av_cpu_count
int av_cpu_count(void)
Definition: cpu.c:185
Task::indata
AVFrame * indata
Definition: frame_thread_encoder.c:43
AVPacket::size
int size
Definition: packet.h:374
cpu.h
ThreadContext::next_task_index
unsigned next_task_index
Definition: frame_thread_encoder.c:62
AVCodec::encode2
int(* encode2)(struct AVCodecContext *avctx, struct AVPacket *avpkt, const struct AVFrame *frame, int *got_packet_ptr)
Encode data to an AVPacket.
Definition: codec.h:302
ThreadContext::task_index
unsigned task_index
Definition: frame_thread_encoder.c:63
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:372
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:480
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:64
pthread_t
Definition: os2threads.h:44
FF_THREAD_FRAME
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:1451
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:60
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:366
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:462
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:435
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:263
pthread_cond_t
Definition: os2threads.h:58
worker
static void *attribute_align_arg worker(void *v)
Definition: frame_thread_encoder.c:76
OFF
#define OFF(member)
Definition: frame_thread_encoder.c:70
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:1858
avcodec.h
ThreadContext::finished_task_mutex
pthread_mutex_t finished_task_mutex
Definition: frame_thread_encoder.c:59
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:383
AVCodecContext::active_thread_type
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:1459
ThreadContext
Definition: frame_thread_encoder.c:49
ThreadContext::pthread_init_cnt
unsigned pthread_init_cnt
Definition: frame_thread_encoder.c:56
ff_frame_thread_encoder_free
av_cold void ff_frame_thread_encoder_free(AVCodecContext *avctx)
Definition: frame_thread_encoder.c:256
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:57
av_opt_copy
int av_opt_copy(void *dst, const void *src)
Copy options from src object into dest object.
Definition: opt.c:1775
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:410
AVPacket
This structure stores compressed data.
Definition: packet.h:350
Task::return_code
int return_code
Definition: frame_thread_encoder.c:45
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
Task
Definition: frame_thread_encoder.c:42
imgutils.h
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
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:54
AV_CODEC_FLAG_PASS1
#define AV_CODEC_FLAG_PASS1
Use internal 2pass ratecontrol in first pass mode.
Definition: avcodec.h:231
pthread_mutex_lock
#define pthread_mutex_lock(a)
Definition: ffprobe.c:64