FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
libschroedingerenc.c
Go to the documentation of this file.
1 /*
2  * Dirac encoder support via Schroedinger libraries
3  * Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23 * @file
24 * Dirac encoder support via libschroedinger-1.0 libraries. More details about
25 * the Schroedinger project can be found at http://www.diracvideo.org/.
26 * The library implements Dirac Specification Version 2.2
27 * (http://dirac.sourceforge.net/specification.html).
28 */
29 
30 #include <schroedinger/schro.h>
31 #include <schroedinger/schrodebug.h>
32 #include <schroedinger/schrovideoformat.h>
33 
34 #include "libavutil/attributes.h"
35 #include "libavutil/avassert.h"
36 #include "avcodec.h"
37 #include "internal.h"
38 #include "libschroedinger.h"
39 #include "bytestream.h"
40 
41 
42 /** libschroedinger encoder private data */
43 typedef struct SchroEncoderParams {
44  /** Schroedinger video format */
45  SchroVideoFormat *format;
46 
47  /** Schroedinger frame format */
48  SchroFrameFormat frame_format;
49 
50  /** frame size */
52 
53  /** Schroedinger encoder handle*/
54  SchroEncoder* encoder;
55 
56  /** buffer to store encoder output before writing it to the frame queue*/
57  unsigned char *enc_buf;
58 
59  /** Size of encoder buffer*/
61 
62  /** queue storing encoded frames */
64 
65  /** end of sequence signalled */
67 
68  /** end of sequence pulled */
70 
71  /* counter for frames submitted to encoder, used as dts */
72  int64_t dts;
74 
75 /**
76 * Works out Schro-compatible chroma format.
77 */
79 {
80  int num_formats = sizeof(schro_pixel_format_map) /
81  sizeof(schro_pixel_format_map[0]);
82  int idx;
83 
84  SchroEncoderParams *p_schro_params = avctx->priv_data;
85 
86  for (idx = 0; idx < num_formats; ++idx) {
87  if (schro_pixel_format_map[idx].ff_pix_fmt == avctx->pix_fmt) {
88  p_schro_params->format->chroma_format =
89  schro_pixel_format_map[idx].schro_pix_fmt;
90  return 0;
91  }
92  }
93 
94  av_log(avctx, AV_LOG_ERROR,
95  "This codec currently only supports planar YUV 4:2:0, 4:2:2"
96  " and 4:4:4 formats.\n");
97 
98  return -1;
99 }
100 
102 {
103  SchroEncoderParams *p_schro_params = avctx->priv_data;
104  SchroVideoFormatEnum preset;
105 
106  /* Initialize the libraries that libschroedinger depends on. */
107  schro_init();
108 
109  /* Create an encoder object. */
110  p_schro_params->encoder = schro_encoder_new();
111 
112  if (!p_schro_params->encoder) {
113  av_log(avctx, AV_LOG_ERROR,
114  "Unrecoverable Error: schro_encoder_new failed. ");
115  return -1;
116  }
117 
118  /* Initialize the format. */
119  preset = ff_get_schro_video_format_preset(avctx);
120  p_schro_params->format =
121  schro_encoder_get_video_format(p_schro_params->encoder);
122  schro_video_format_set_std_video_format(p_schro_params->format, preset);
123  p_schro_params->format->width = avctx->width;
124  p_schro_params->format->height = avctx->height;
125 
126  if (set_chroma_format(avctx) == -1)
127  return -1;
128 
129  if (avctx->color_primaries == AVCOL_PRI_BT709) {
130  p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_HDTV;
131  } else if (avctx->color_primaries == AVCOL_PRI_BT470BG) {
132  p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_SDTV_625;
133  } else if (avctx->color_primaries == AVCOL_PRI_SMPTE170M) {
134  p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_SDTV_525;
135  }
136 
137  if (avctx->colorspace == AVCOL_SPC_BT709) {
138  p_schro_params->format->colour_matrix = SCHRO_COLOUR_MATRIX_HDTV;
139  } else if (avctx->colorspace == AVCOL_SPC_BT470BG) {
140  p_schro_params->format->colour_matrix = SCHRO_COLOUR_MATRIX_SDTV;
141  }
142 
143  if (avctx->color_trc == AVCOL_TRC_BT709) {
144  p_schro_params->format->transfer_function = SCHRO_TRANSFER_CHAR_TV_GAMMA;
145  }
146 
147  if (ff_get_schro_frame_format(p_schro_params->format->chroma_format,
148  &p_schro_params->frame_format) == -1) {
149  av_log(avctx, AV_LOG_ERROR,
150  "This codec currently supports only planar YUV 4:2:0, 4:2:2"
151  " and 4:4:4 formats.\n");
152  return -1;
153  }
154 
155  p_schro_params->format->frame_rate_numerator = avctx->time_base.den;
156  p_schro_params->format->frame_rate_denominator = avctx->time_base.num;
157 
158  p_schro_params->frame_size = avpicture_get_size(avctx->pix_fmt,
159  avctx->width,
160  avctx->height);
161 
162  if (!avctx->gop_size) {
163  schro_encoder_setting_set_double(p_schro_params->encoder,
164  "gop_structure",
165  SCHRO_ENCODER_GOP_INTRA_ONLY);
166 
167  if (avctx->coder_type == FF_CODER_TYPE_VLC)
168  schro_encoder_setting_set_double(p_schro_params->encoder,
169  "enable_noarith", 1);
170  } else {
171  schro_encoder_setting_set_double(p_schro_params->encoder,
172  "au_distance", avctx->gop_size);
173  avctx->has_b_frames = 1;
174  p_schro_params->dts = -1;
175  }
176 
177  /* FIXME - Need to handle SCHRO_ENCODER_RATE_CONTROL_LOW_DELAY. */
178  if (avctx->flags & AV_CODEC_FLAG_QSCALE) {
179  if (!avctx->global_quality) {
180  /* lossless coding */
181  schro_encoder_setting_set_double(p_schro_params->encoder,
182  "rate_control",
183  SCHRO_ENCODER_RATE_CONTROL_LOSSLESS);
184  } else {
185  int quality;
186  schro_encoder_setting_set_double(p_schro_params->encoder,
187  "rate_control",
188  SCHRO_ENCODER_RATE_CONTROL_CONSTANT_QUALITY);
189 
190  quality = avctx->global_quality / FF_QP2LAMBDA;
191  if (quality > 10)
192  quality = 10;
193  schro_encoder_setting_set_double(p_schro_params->encoder,
194  "quality", quality);
195  }
196  } else {
197  schro_encoder_setting_set_double(p_schro_params->encoder,
198  "rate_control",
199  SCHRO_ENCODER_RATE_CONTROL_CONSTANT_BITRATE);
200 
201  schro_encoder_setting_set_double(p_schro_params->encoder,
202  "bitrate", avctx->bit_rate);
203  }
204 
205  if (avctx->flags & AV_CODEC_FLAG_INTERLACED_ME)
206  /* All material can be coded as interlaced or progressive
207  irrespective of the type of source material. */
208  schro_encoder_setting_set_double(p_schro_params->encoder,
209  "interlaced_coding", 1);
210 
211  schro_encoder_setting_set_double(p_schro_params->encoder, "open_gop",
212  !(avctx->flags & AV_CODEC_FLAG_CLOSED_GOP));
213 
214  /* FIXME: Signal range hardcoded to 8-bit data until both libschroedinger
215  * and libdirac support other bit-depth data. */
216  schro_video_format_set_std_signal_range(p_schro_params->format,
217  SCHRO_SIGNAL_RANGE_8BIT_VIDEO);
218 
219  /* Set the encoder format. */
220  schro_encoder_set_video_format(p_schro_params->encoder,
221  p_schro_params->format);
222 
223  /* Set the debug level. */
224  schro_debug_set_level(avctx->debug);
225 
226  schro_encoder_start(p_schro_params->encoder);
227 
228  /* Initialize the encoded frame queue. */
229  ff_schro_queue_init(&p_schro_params->enc_frame_queue);
230  return 0;
231 }
232 
234  const AVFrame *frame)
235 {
236  SchroEncoderParams *p_schro_params = avctx->priv_data;
237  SchroFrame *in_frame;
238  /* Input line size may differ from what the codec supports. Especially
239  * when transcoding from one format to another. So use avpicture_layout
240  * to copy the frame. */
241  in_frame = ff_create_schro_frame(avctx, p_schro_params->frame_format);
242 
243  if (in_frame)
244  avpicture_layout((const AVPicture *)frame, avctx->pix_fmt,
245  avctx->width, avctx->height,
246  in_frame->components[0].data,
247  p_schro_params->frame_size);
248 
249  return in_frame;
250 }
251 
253 {
254  FFSchroEncodedFrame *enc_frame = data;
255 
256  av_freep(&enc_frame->p_encbuf);
257  av_free(enc_frame);
258 }
259 
261  const AVFrame *frame, int *got_packet)
262 {
263  int enc_size = 0;
264  SchroEncoderParams *p_schro_params = avctx->priv_data;
265  SchroEncoder *encoder = p_schro_params->encoder;
266  struct FFSchroEncodedFrame *p_frame_output = NULL;
267  int go = 1;
268  SchroBuffer *enc_buf;
269  int presentation_frame;
270  int parse_code;
271  int last_frame_in_sequence = 0;
272  int pkt_size, ret;
273 
274  if (!frame) {
275  /* Push end of sequence if not already signalled. */
276  if (!p_schro_params->eos_signalled) {
277  schro_encoder_end_of_stream(encoder);
278  p_schro_params->eos_signalled = 1;
279  }
280  } else {
281  /* Allocate frame data to schro input buffer. */
282  SchroFrame *in_frame = libschroedinger_frame_from_data(avctx, frame);
283  if (!in_frame)
284  return AVERROR(ENOMEM);
285  /* Load next frame. */
286  schro_encoder_push_frame(encoder, in_frame);
287  }
288 
289  if (p_schro_params->eos_pulled)
290  go = 0;
291 
292  /* Now check to see if we have any output from the encoder. */
293  while (go) {
294  int err;
295  SchroStateEnum state;
296  state = schro_encoder_wait(encoder);
297  switch (state) {
298  case SCHRO_STATE_HAVE_BUFFER:
299  case SCHRO_STATE_END_OF_STREAM:
300  enc_buf = schro_encoder_pull(encoder, &presentation_frame);
301  if (enc_buf->length <= 0)
302  return AVERROR_BUG;
303  parse_code = enc_buf->data[4];
304 
305  /* All non-frame data is prepended to actual frame data to
306  * be able to set the pts correctly. So we don't write data
307  * to the frame output queue until we actually have a frame
308  */
309  if ((err = av_reallocp(&p_schro_params->enc_buf,
310  p_schro_params->enc_buf_size +
311  enc_buf->length)) < 0) {
312  p_schro_params->enc_buf_size = 0;
313  return err;
314  }
315 
316  memcpy(p_schro_params->enc_buf + p_schro_params->enc_buf_size,
317  enc_buf->data, enc_buf->length);
318  p_schro_params->enc_buf_size += enc_buf->length;
319 
320 
321  if (state == SCHRO_STATE_END_OF_STREAM) {
322  p_schro_params->eos_pulled = 1;
323  go = 0;
324  }
325 
326  if (!SCHRO_PARSE_CODE_IS_PICTURE(parse_code)) {
327  schro_buffer_unref(enc_buf);
328  break;
329  }
330 
331  /* Create output frame. */
332  p_frame_output = av_mallocz(sizeof(FFSchroEncodedFrame));
333  if (!p_frame_output)
334  return AVERROR(ENOMEM);
335  /* Set output data. */
336  p_frame_output->size = p_schro_params->enc_buf_size;
337  p_frame_output->p_encbuf = p_schro_params->enc_buf;
338  if (SCHRO_PARSE_CODE_IS_INTRA(parse_code) &&
339  SCHRO_PARSE_CODE_IS_REFERENCE(parse_code))
340  p_frame_output->key_frame = 1;
341 
342  /* Parse the coded frame number from the bitstream. Bytes 14
343  * through 17 represesent the frame number. */
344  p_frame_output->frame_num = AV_RB32(enc_buf->data + 13);
345 
346  ff_schro_queue_push_back(&p_schro_params->enc_frame_queue,
347  p_frame_output);
348  p_schro_params->enc_buf_size = 0;
349  p_schro_params->enc_buf = NULL;
350 
351  schro_buffer_unref(enc_buf);
352 
353  break;
354 
355  case SCHRO_STATE_NEED_FRAME:
356  go = 0;
357  break;
358 
359  case SCHRO_STATE_AGAIN:
360  break;
361 
362  default:
363  av_log(avctx, AV_LOG_ERROR, "Unknown Schro Encoder state\n");
364  return -1;
365  }
366  }
367 
368  /* Copy 'next' frame in queue. */
369 
370  if (p_schro_params->enc_frame_queue.size == 1 &&
371  p_schro_params->eos_pulled)
372  last_frame_in_sequence = 1;
373 
374  p_frame_output = ff_schro_queue_pop(&p_schro_params->enc_frame_queue);
375 
376  if (!p_frame_output)
377  return 0;
378 
379  pkt_size = p_frame_output->size;
380  if (last_frame_in_sequence && p_schro_params->enc_buf_size > 0)
381  pkt_size += p_schro_params->enc_buf_size;
382  if ((ret = ff_alloc_packet2(avctx, pkt, pkt_size, 0)) < 0)
383  goto error;
384 
385  memcpy(pkt->data, p_frame_output->p_encbuf, p_frame_output->size);
386 #if FF_API_CODED_FRAME
388  avctx->coded_frame->key_frame = p_frame_output->key_frame;
389  avctx->coded_frame->pts = p_frame_output->frame_num;
391 #endif
392  /* Use the frame number of the encoded frame as the pts. It is OK to
393  * do so since Dirac is a constant frame rate codec. It expects input
394  * to be of constant frame rate. */
395  pkt->pts = p_frame_output->frame_num;
396  pkt->dts = p_schro_params->dts++;
397  enc_size = p_frame_output->size;
398 
399  /* Append the end of sequence information to the last frame in the
400  * sequence. */
401  if (last_frame_in_sequence && p_schro_params->enc_buf_size > 0) {
402  memcpy(pkt->data + enc_size, p_schro_params->enc_buf,
403  p_schro_params->enc_buf_size);
404  enc_size += p_schro_params->enc_buf_size;
405  av_freep(&p_schro_params->enc_buf);
406  p_schro_params->enc_buf_size = 0;
407  }
408 
409  if (p_frame_output->key_frame)
410  pkt->flags |= AV_PKT_FLAG_KEY;
411  *got_packet = 1;
412 
413 error:
414  /* free frame */
415  libschroedinger_free_frame(p_frame_output);
416  return ret;
417 }
418 
419 
421 {
422  SchroEncoderParams *p_schro_params = avctx->priv_data;
423 
424  /* Close the encoder. */
425  schro_encoder_free(p_schro_params->encoder);
426 
427  /* Free data in the output frame queue. */
428  ff_schro_queue_free(&p_schro_params->enc_frame_queue,
430 
431 
432  /* Free the encoder buffer. */
433  if (p_schro_params->enc_buf_size)
434  av_freep(&p_schro_params->enc_buf);
435 
436  /* Free the video format structure. */
437  av_freep(&p_schro_params->format);
438 
439  return 0;
440 }
441 
442 
444  .name = "libschroedinger",
445  .long_name = NULL_IF_CONFIG_SMALL("libschroedinger Dirac 2.2"),
446  .type = AVMEDIA_TYPE_VIDEO,
447  .id = AV_CODEC_ID_DIRAC,
448  .priv_data_size = sizeof(SchroEncoderParams),
450  .encode2 = libschroedinger_encode_frame,
452  .capabilities = AV_CODEC_CAP_DELAY,
453  .pix_fmts = (const enum AVPixelFormat[]){
455  },
456 };
#define AV_CODEC_FLAG_INTERLACED_ME
interlaced motion estimation
Definition: avcodec.h:797
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
Definition: pixfmt.h:519
#define NULL
Definition: coverity.c:32
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:68
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
uint16_t key_frame
key frame flag.
SchroFrame * ff_create_schro_frame(AVCodecContext *avctx, SchroFrameFormat schro_frame_fmt)
Create a Schro frame based on the dimensions and frame format passed.
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601 ...
Definition: pixfmt.h:523
int num
numerator
Definition: rational.h:44
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1722
int avpicture_layout(const AVPicture *src, enum AVPixelFormat pix_fmt, int width, int height, unsigned char *dest, int dest_size)
Copy pixel data from an AVPicture into a buffer.
Definition: avpicture.c:41
libschroedinger encoder private data
static AVPacket pkt
int frame_size
frame size
Picture data structure.
Definition: avcodec.h:3744
data structures common to libschroedinger decoder and encoder
AVCodec.
Definition: avcodec.h:3472
enum AVPixelFormat ff_pix_fmt
Macro definitions for various function/variable attributes.
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1631
#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: avcodec.h:882
static void libschroedinger_free_frame(void *data)
#define av_cold
Definition: attributes.h:74
uint32_t frame_num
encoded frame number.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:257
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
static AVFrame * frame
int coder_type
coder type
Definition: avcodec.h:2657
uint8_t * data
Definition: avcodec.h:1423
int av_reallocp(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:187
contains a single encoded frame returned from Dirac or Schroedinger
int size
Queue size.
#define av_log(a,...)
uint8_t * p_encbuf
encoded frame data
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1469
static int set_chroma_format(AVCodecContext *avctx)
Works out Schro-compatible chroma format.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int has_b_frames
Size of the frame reordering buffer in the decoder.
Definition: avcodec.h:1812
SchroEncoder * encoder
Schroedinger encoder handle.
SchroFrameFormat frame_format
Schroedinger frame format.
void * ff_schro_queue_pop(FFSchroQueue *queue)
Return the first element in the queue.
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1597
also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
Definition: pixfmt.h:478
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3479
FFSchroQueue enc_frame_queue
queue storing encoded frames
#define FF_CODER_TYPE_VLC
Definition: avcodec.h:2645
SchroVideoFormat * format
Schroedinger video format.
Libavcodec external API header.
static const struct @66 schro_pixel_format_map[]
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1429
int ff_get_schro_frame_format(SchroChromaFormat schro_pix_fmt, SchroFrameFormat *schro_frame_fmt)
Sets the Schroedinger frame format corresponding to the Schro chroma format passed.
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:67
int enc_buf_size
Size of encoder buffer.
int bit_rate
the average bitrate
Definition: avcodec.h:1567
#define AV_CODEC_FLAG_QSCALE
Use fixed qscale.
Definition: avcodec.h:735
int ff_schro_queue_push_back(FFSchroQueue *queue, void *p_data)
Add an element to the end of the queue.
void ff_schro_queue_free(FFSchroQueue *queue, void(*free_func)(void *))
Free the queue resources.
av_cold void ff_schro_queue_init(FFSchroQueue *queue)
Initialise the queue.
A simple queue implementation used in libschroedinger.
int width
picture width / height.
Definition: avcodec.h:1681
static av_cold int libschroedinger_encode_init(AVCodecContext *avctx)
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
Definition: pixfmt.h:483
static struct @197 state
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:2216
static int libschroedinger_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
int eos_signalled
end of sequence signalled
also ITU-R BT1361
Definition: pixfmt.h:496
int debug
debug
Definition: avcodec.h:2842
main external API structure.
Definition: avcodec.h:1502
unsigned char * enc_buf
buffer to store encoder output before writing it to the frame queue
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2230
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2223
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
Definition: utils.c:1782
SchroVideoFormatEnum ff_get_schro_video_format_preset(AVCodecContext *avctx)
Returns the video format preset matching the input video dimensions and time base.
int eos_pulled
end of sequence pulled
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:209
int global_quality
Global quality for codecs which cannot change it per frame.
Definition: avcodec.h:1583
static SchroFrame * libschroedinger_frame_from_data(AVCodecContext *avctx, const AVFrame *frame)
int gop_size
the number of pictures in a group of pictures, or 0 for intra_only
Definition: avcodec.h:1707
preset
Definition: vf_curves.c:46
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:79
common internal api header.
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:3024
AVCodec ff_libschroedinger_encoder
int den
denominator
Definition: rational.h:45
static int libschroedinger_encode_close(AVCodecContext *avctx)
void * priv_data
Definition: avcodec.h:1544
#define av_free(p)
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:80
uint32_t size
encoded frame size
int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height)
Calculate the size in bytes that a picture of the given width and height would occupy if stored in th...
Definition: avpicture.c:49
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:237
#define FF_QP2LAMBDA
factor to convert from H.263 QP to lambda
Definition: avutil.h:219
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1422
also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
Definition: pixfmt.h:484
#define av_freep(p)
#define AV_CODEC_FLAG_CLOSED_GOP
Allow non spec compliant speedup tricks.
Definition: avcodec.h:801
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
This structure stores compressed data.
Definition: avcodec.h:1400
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1416