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libvpxenc.c
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1 /*
2  * Copyright (c) 2010, Google, Inc.
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 /**
22  * @file
23  * VP8 encoder support via libvpx
24  */
25 
26 #define VPX_DISABLE_CTRL_TYPECHECKS 1
27 #define VPX_CODEC_DISABLE_COMPAT 1
28 #include <vpx/vpx_encoder.h>
29 #include <vpx/vp8cx.h>
30 
31 #include "avcodec.h"
32 #include "internal.h"
33 #include "libavutil/avassert.h"
34 #include "libvpx.h"
35 #include "libavutil/base64.h"
36 #include "libavutil/common.h"
37 #include "libavutil/intreadwrite.h"
38 #include "libavutil/mathematics.h"
39 #include "libavutil/opt.h"
40 
41 /**
42  * Portion of struct vpx_codec_cx_pkt from vpx_encoder.h.
43  * One encoded frame returned from the library.
44  */
45 struct FrameListData {
46  void *buf; /**< compressed data buffer */
47  size_t sz; /**< length of compressed data */
48  void *buf_alpha;
49  size_t sz_alpha;
50  int64_t pts; /**< time stamp to show frame
51  (in timebase units) */
52  unsigned long duration; /**< duration to show frame
53  (in timebase units) */
54  uint32_t flags; /**< flags for this frame */
55  uint64_t sse[4];
56  int have_sse; /**< true if we have pending sse[] */
57  uint64_t frame_number;
58  struct FrameListData *next;
59 };
60 
61 typedef struct VP8EncoderContext {
62  AVClass *class;
63  struct vpx_codec_ctx encoder;
64  struct vpx_image rawimg;
65  struct vpx_codec_ctx encoder_alpha;
66  struct vpx_image rawimg_alpha;
67  uint8_t is_alpha;
68  struct vpx_fixed_buf twopass_stats;
69  int deadline; //i.e., RT/GOOD/BEST
70  uint64_t sse[4];
71  int have_sse; /**< true if we have pending sse[] */
72  uint64_t frame_number;
73  struct FrameListData *coded_frame_list;
74 
75  int cpu_used;
76  /**
77  * VP8 specific flags, see VP8F_* below.
78  */
79  int flags;
80 #define VP8F_ERROR_RESILIENT 0x00000001 ///< Enable measures appropriate for streaming over lossy links
81 #define VP8F_AUTO_ALT_REF 0x00000002 ///< Enable automatic alternate reference frame generation
82 
83  int auto_alt_ref;
84 
85  int arnr_max_frames;
86  int arnr_strength;
87  int arnr_type;
88 
89  int lag_in_frames;
90  int error_resilient;
91  int crf;
92  int max_intra_rate;
93 
94  // VP9-only
95  int lossless;
96  int tile_columns;
97  int tile_rows;
98  int frame_parallel;
99 } VP8Context;
100 
101 /** String mappings for enum vp8e_enc_control_id */
102 static const char *const ctlidstr[] = {
103  [VP8E_UPD_ENTROPY] = "VP8E_UPD_ENTROPY",
104  [VP8E_UPD_REFERENCE] = "VP8E_UPD_REFERENCE",
105  [VP8E_USE_REFERENCE] = "VP8E_USE_REFERENCE",
106  [VP8E_SET_ROI_MAP] = "VP8E_SET_ROI_MAP",
107  [VP8E_SET_ACTIVEMAP] = "VP8E_SET_ACTIVEMAP",
108  [VP8E_SET_SCALEMODE] = "VP8E_SET_SCALEMODE",
109  [VP8E_SET_CPUUSED] = "VP8E_SET_CPUUSED",
110  [VP8E_SET_ENABLEAUTOALTREF] = "VP8E_SET_ENABLEAUTOALTREF",
111  [VP8E_SET_NOISE_SENSITIVITY] = "VP8E_SET_NOISE_SENSITIVITY",
112  [VP8E_SET_SHARPNESS] = "VP8E_SET_SHARPNESS",
113  [VP8E_SET_STATIC_THRESHOLD] = "VP8E_SET_STATIC_THRESHOLD",
114  [VP8E_SET_TOKEN_PARTITIONS] = "VP8E_SET_TOKEN_PARTITIONS",
115  [VP8E_GET_LAST_QUANTIZER] = "VP8E_GET_LAST_QUANTIZER",
116  [VP8E_SET_ARNR_MAXFRAMES] = "VP8E_SET_ARNR_MAXFRAMES",
117  [VP8E_SET_ARNR_STRENGTH] = "VP8E_SET_ARNR_STRENGTH",
118  [VP8E_SET_ARNR_TYPE] = "VP8E_SET_ARNR_TYPE",
119  [VP8E_SET_CQ_LEVEL] = "VP8E_SET_CQ_LEVEL",
120  [VP8E_SET_MAX_INTRA_BITRATE_PCT] = "VP8E_SET_MAX_INTRA_BITRATE_PCT",
121 #if CONFIG_LIBVPX_VP9_ENCODER
122  [VP9E_SET_LOSSLESS] = "VP9E_SET_LOSSLESS",
123  [VP9E_SET_TILE_COLUMNS] = "VP9E_SET_TILE_COLUMNS",
124  [VP9E_SET_TILE_ROWS] = "VP9E_SET_TILE_ROWS",
125  [VP9E_SET_FRAME_PARALLEL_DECODING] = "VP9E_SET_FRAME_PARALLEL_DECODING",
126 #endif
127 };
128 
129 static av_cold void log_encoder_error(AVCodecContext *avctx, const char *desc)
130 {
131  VP8Context *ctx = avctx->priv_data;
132  const char *error = vpx_codec_error(&ctx->encoder);
133  const char *detail = vpx_codec_error_detail(&ctx->encoder);
134 
135  av_log(avctx, AV_LOG_ERROR, "%s: %s\n", desc, error);
136  if (detail)
137  av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n", detail);
138 }
139 
140 static av_cold void dump_enc_cfg(AVCodecContext *avctx,
141  const struct vpx_codec_enc_cfg *cfg)
142 {
143  int width = -30;
144  int level = AV_LOG_DEBUG;
145 
146  av_log(avctx, level, "vpx_codec_enc_cfg\n");
147  av_log(avctx, level, "generic settings\n"
148  " %*s%u\n %*s%u\n %*s%u\n %*s%u\n %*s%u\n"
149  " %*s{%u/%u}\n %*s%u\n %*s%d\n %*s%u\n",
150  width, "g_usage:", cfg->g_usage,
151  width, "g_threads:", cfg->g_threads,
152  width, "g_profile:", cfg->g_profile,
153  width, "g_w:", cfg->g_w,
154  width, "g_h:", cfg->g_h,
155  width, "g_timebase:", cfg->g_timebase.num, cfg->g_timebase.den,
156  width, "g_error_resilient:", cfg->g_error_resilient,
157  width, "g_pass:", cfg->g_pass,
158  width, "g_lag_in_frames:", cfg->g_lag_in_frames);
159  av_log(avctx, level, "rate control settings\n"
160  " %*s%u\n %*s%u\n %*s%u\n %*s%u\n"
161  " %*s%d\n %*s%p(%zu)\n %*s%u\n",
162  width, "rc_dropframe_thresh:", cfg->rc_dropframe_thresh,
163  width, "rc_resize_allowed:", cfg->rc_resize_allowed,
164  width, "rc_resize_up_thresh:", cfg->rc_resize_up_thresh,
165  width, "rc_resize_down_thresh:", cfg->rc_resize_down_thresh,
166  width, "rc_end_usage:", cfg->rc_end_usage,
167  width, "rc_twopass_stats_in:", cfg->rc_twopass_stats_in.buf, cfg->rc_twopass_stats_in.sz,
168  width, "rc_target_bitrate:", cfg->rc_target_bitrate);
169  av_log(avctx, level, "quantizer settings\n"
170  " %*s%u\n %*s%u\n",
171  width, "rc_min_quantizer:", cfg->rc_min_quantizer,
172  width, "rc_max_quantizer:", cfg->rc_max_quantizer);
173  av_log(avctx, level, "bitrate tolerance\n"
174  " %*s%u\n %*s%u\n",
175  width, "rc_undershoot_pct:", cfg->rc_undershoot_pct,
176  width, "rc_overshoot_pct:", cfg->rc_overshoot_pct);
177  av_log(avctx, level, "decoder buffer model\n"
178  " %*s%u\n %*s%u\n %*s%u\n",
179  width, "rc_buf_sz:", cfg->rc_buf_sz,
180  width, "rc_buf_initial_sz:", cfg->rc_buf_initial_sz,
181  width, "rc_buf_optimal_sz:", cfg->rc_buf_optimal_sz);
182  av_log(avctx, level, "2 pass rate control settings\n"
183  " %*s%u\n %*s%u\n %*s%u\n",
184  width, "rc_2pass_vbr_bias_pct:", cfg->rc_2pass_vbr_bias_pct,
185  width, "rc_2pass_vbr_minsection_pct:", cfg->rc_2pass_vbr_minsection_pct,
186  width, "rc_2pass_vbr_maxsection_pct:", cfg->rc_2pass_vbr_maxsection_pct);
187  av_log(avctx, level, "keyframing settings\n"
188  " %*s%d\n %*s%u\n %*s%u\n",
189  width, "kf_mode:", cfg->kf_mode,
190  width, "kf_min_dist:", cfg->kf_min_dist,
191  width, "kf_max_dist:", cfg->kf_max_dist);
192  av_log(avctx, level, "\n");
193 }
194 
195 static void coded_frame_add(void *list, struct FrameListData *cx_frame)
196 {
197  struct FrameListData **p = list;
198 
199  while (*p != NULL)
200  p = &(*p)->next;
201  *p = cx_frame;
202  cx_frame->next = NULL;
203 }
204 
205 static av_cold void free_coded_frame(struct FrameListData *cx_frame)
206 {
207  av_freep(&cx_frame->buf);
208  if (cx_frame->buf_alpha)
209  av_freep(&cx_frame->buf_alpha);
210  av_freep(&cx_frame);
211 }
212 
213 static av_cold void free_frame_list(struct FrameListData *list)
214 {
215  struct FrameListData *p = list;
216 
217  while (p) {
218  list = list->next;
219  free_coded_frame(p);
220  p = list;
221  }
222 }
223 
224 static av_cold int codecctl_int(AVCodecContext *avctx,
225  enum vp8e_enc_control_id id, int val)
226 {
227  VP8Context *ctx = avctx->priv_data;
228  char buf[80];
229  int width = -30;
230  int res;
231 
232  snprintf(buf, sizeof(buf), "%s:", ctlidstr[id]);
233  av_log(avctx, AV_LOG_DEBUG, " %*s%d\n", width, buf, val);
234 
235  res = vpx_codec_control(&ctx->encoder, id, val);
236  if (res != VPX_CODEC_OK) {
237  snprintf(buf, sizeof(buf), "Failed to set %s codec control",
238  ctlidstr[id]);
239  log_encoder_error(avctx, buf);
240  }
241 
242  return res == VPX_CODEC_OK ? 0 : AVERROR(EINVAL);
243 }
244 
245 static av_cold int vp8_free(AVCodecContext *avctx)
246 {
247  VP8Context *ctx = avctx->priv_data;
248 
249  vpx_codec_destroy(&ctx->encoder);
250  if (ctx->is_alpha)
251  vpx_codec_destroy(&ctx->encoder_alpha);
252  av_freep(&ctx->twopass_stats.buf);
253  av_freep(&avctx->coded_frame);
254  av_freep(&avctx->stats_out);
255  free_frame_list(ctx->coded_frame_list);
256  return 0;
257 }
258 
259 static av_cold int vpx_init(AVCodecContext *avctx,
260  const struct vpx_codec_iface *iface)
261 {
262  VP8Context *ctx = avctx->priv_data;
263  struct vpx_codec_enc_cfg enccfg;
264  struct vpx_codec_enc_cfg enccfg_alpha;
265  vpx_codec_flags_t flags = (avctx->flags & CODEC_FLAG_PSNR) ? VPX_CODEC_USE_PSNR : 0;
266  int res;
267 
268  av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str());
269  av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config());
270 
271  if (avctx->pix_fmt == AV_PIX_FMT_YUVA420P)
272  ctx->is_alpha = 1;
273 
274  if ((res = vpx_codec_enc_config_default(iface, &enccfg, 0)) != VPX_CODEC_OK) {
275  av_log(avctx, AV_LOG_ERROR, "Failed to get config: %s\n",
276  vpx_codec_err_to_string(res));
277  return AVERROR(EINVAL);
278  }
279 
280  if(!avctx->bit_rate)
281  if(avctx->rc_max_rate || avctx->rc_buffer_size || avctx->rc_initial_buffer_occupancy) {
282  av_log( avctx, AV_LOG_ERROR, "Rate control parameters set without a bitrate\n");
283  return AVERROR(EINVAL);
284  }
285 
286  dump_enc_cfg(avctx, &enccfg);
287 
288  enccfg.g_w = avctx->width;
289  enccfg.g_h = avctx->height;
290  enccfg.g_timebase.num = avctx->time_base.num;
291  enccfg.g_timebase.den = avctx->time_base.den;
292  enccfg.g_threads = avctx->thread_count;
293  enccfg.g_lag_in_frames= ctx->lag_in_frames;
294 
295  if (avctx->flags & CODEC_FLAG_PASS1)
296  enccfg.g_pass = VPX_RC_FIRST_PASS;
297  else if (avctx->flags & CODEC_FLAG_PASS2)
298  enccfg.g_pass = VPX_RC_LAST_PASS;
299  else
300  enccfg.g_pass = VPX_RC_ONE_PASS;
301 
302  if (avctx->rc_min_rate == avctx->rc_max_rate &&
303  avctx->rc_min_rate == avctx->bit_rate && avctx->bit_rate)
304  enccfg.rc_end_usage = VPX_CBR;
305  else if (ctx->crf)
306  enccfg.rc_end_usage = VPX_CQ;
307 
308  if (avctx->bit_rate) {
309  enccfg.rc_target_bitrate = av_rescale_rnd(avctx->bit_rate, 1, 1000,
310  AV_ROUND_NEAR_INF);
311  } else {
312  if (enccfg.rc_end_usage == VPX_CQ) {
313  enccfg.rc_target_bitrate = 1000000;
314  } else {
315  avctx->bit_rate = enccfg.rc_target_bitrate * 1000;
316  av_log(avctx, AV_LOG_WARNING,
317  "Neither bitrate nor constrained quality specified, using default bitrate of %dkbit/sec\n",
318  enccfg.rc_target_bitrate);
319  }
320  }
321 
322  if (avctx->qmin >= 0)
323  enccfg.rc_min_quantizer = avctx->qmin;
324  if (avctx->qmax >= 0)
325  enccfg.rc_max_quantizer = avctx->qmax;
326 
327  if (enccfg.rc_end_usage == VPX_CQ) {
328  if (ctx->crf < enccfg.rc_min_quantizer || ctx->crf > enccfg.rc_max_quantizer) {
329  av_log(avctx, AV_LOG_ERROR,
330  "CQ level must be between minimum and maximum quantizer value (%d-%d)\n",
331  enccfg.rc_min_quantizer, enccfg.rc_max_quantizer);
332  return AVERROR(EINVAL);
333  }
334  }
335 
336  enccfg.rc_dropframe_thresh = avctx->frame_skip_threshold;
337 
338  //0-100 (0 => CBR, 100 => VBR)
339  enccfg.rc_2pass_vbr_bias_pct = round(avctx->qcompress * 100);
340  if (avctx->bit_rate)
341  enccfg.rc_2pass_vbr_minsection_pct =
342  avctx->rc_min_rate * 100LL / avctx->bit_rate;
343  if (avctx->rc_max_rate)
344  enccfg.rc_2pass_vbr_maxsection_pct =
345  avctx->rc_max_rate * 100LL / avctx->bit_rate;
346 
347  if (avctx->rc_buffer_size)
348  enccfg.rc_buf_sz =
349  avctx->rc_buffer_size * 1000LL / avctx->bit_rate;
350  if (avctx->rc_initial_buffer_occupancy)
351  enccfg.rc_buf_initial_sz =
352  avctx->rc_initial_buffer_occupancy * 1000LL / avctx->bit_rate;
353  enccfg.rc_buf_optimal_sz = enccfg.rc_buf_sz * 5 / 6;
354  enccfg.rc_undershoot_pct = round(avctx->rc_buffer_aggressivity * 100);
355 
356  //_enc_init() will balk if kf_min_dist differs from max w/VPX_KF_AUTO
357  if (avctx->keyint_min >= 0 && avctx->keyint_min == avctx->gop_size)
358  enccfg.kf_min_dist = avctx->keyint_min;
359  if (avctx->gop_size >= 0)
360  enccfg.kf_max_dist = avctx->gop_size;
361 
362  if (enccfg.g_pass == VPX_RC_FIRST_PASS)
363  enccfg.g_lag_in_frames = 0;
364  else if (enccfg.g_pass == VPX_RC_LAST_PASS) {
365  int decode_size;
366 
367  if (!avctx->stats_in) {
368  av_log(avctx, AV_LOG_ERROR, "No stats file for second pass\n");
369  return AVERROR_INVALIDDATA;
370  }
371 
372  ctx->twopass_stats.sz = strlen(avctx->stats_in) * 3 / 4;
373  ctx->twopass_stats.buf = av_malloc(ctx->twopass_stats.sz);
374  if (!ctx->twopass_stats.buf) {
375  av_log(avctx, AV_LOG_ERROR,
376  "Stat buffer alloc (%zu bytes) failed\n",
377  ctx->twopass_stats.sz);
378  return AVERROR(ENOMEM);
379  }
380  decode_size = av_base64_decode(ctx->twopass_stats.buf, avctx->stats_in,
381  ctx->twopass_stats.sz);
382  if (decode_size < 0) {
383  av_log(avctx, AV_LOG_ERROR, "Stat buffer decode failed\n");
384  return AVERROR_INVALIDDATA;
385  }
386 
387  ctx->twopass_stats.sz = decode_size;
388  enccfg.rc_twopass_stats_in = ctx->twopass_stats;
389  }
390 
391  /* 0-3: For non-zero values the encoder increasingly optimizes for reduced
392  complexity playback on low powered devices at the expense of encode
393  quality. */
394  if (avctx->profile != FF_PROFILE_UNKNOWN)
395  enccfg.g_profile = avctx->profile;
396 
397  enccfg.g_error_resilient = ctx->error_resilient || ctx->flags & VP8F_ERROR_RESILIENT;
398 
399  dump_enc_cfg(avctx, &enccfg);
400  /* Construct Encoder Context */
401  res = vpx_codec_enc_init(&ctx->encoder, iface, &enccfg, flags);
402  if (res != VPX_CODEC_OK) {
403  log_encoder_error(avctx, "Failed to initialize encoder");
404  return AVERROR(EINVAL);
405  }
406 
407  if (ctx->is_alpha) {
408  enccfg_alpha = enccfg;
409  res = vpx_codec_enc_init(&ctx->encoder_alpha, iface, &enccfg_alpha, flags);
410  if (res != VPX_CODEC_OK) {
411  log_encoder_error(avctx, "Failed to initialize alpha encoder");
412  return AVERROR(EINVAL);
413  }
414  }
415 
416  //codec control failures are currently treated only as warnings
417  av_log(avctx, AV_LOG_DEBUG, "vpx_codec_control\n");
418  if (ctx->cpu_used != INT_MIN)
419  codecctl_int(avctx, VP8E_SET_CPUUSED, ctx->cpu_used);
420  if (ctx->flags & VP8F_AUTO_ALT_REF)
421  ctx->auto_alt_ref = 1;
422  if (ctx->auto_alt_ref >= 0)
423  codecctl_int(avctx, VP8E_SET_ENABLEAUTOALTREF, ctx->auto_alt_ref);
424  if (ctx->arnr_max_frames >= 0)
425  codecctl_int(avctx, VP8E_SET_ARNR_MAXFRAMES, ctx->arnr_max_frames);
426  if (ctx->arnr_strength >= 0)
427  codecctl_int(avctx, VP8E_SET_ARNR_STRENGTH, ctx->arnr_strength);
428  if (ctx->arnr_type >= 0)
429  codecctl_int(avctx, VP8E_SET_ARNR_TYPE, ctx->arnr_type);
430  codecctl_int(avctx, VP8E_SET_NOISE_SENSITIVITY, avctx->noise_reduction);
431  if (avctx->codec_id == AV_CODEC_ID_VP8)
432  codecctl_int(avctx, VP8E_SET_TOKEN_PARTITIONS, av_log2(avctx->slices));
433  codecctl_int(avctx, VP8E_SET_STATIC_THRESHOLD, avctx->mb_threshold);
434  codecctl_int(avctx, VP8E_SET_CQ_LEVEL, ctx->crf);
435  if (ctx->max_intra_rate >= 0)
436  codecctl_int(avctx, VP8E_SET_MAX_INTRA_BITRATE_PCT, ctx->max_intra_rate);
437 
438 #if CONFIG_LIBVPX_VP9_ENCODER
439  if (avctx->codec_id == AV_CODEC_ID_VP9) {
440  if (ctx->lossless >= 0)
441  codecctl_int(avctx, VP9E_SET_LOSSLESS, ctx->lossless);
442  if (ctx->tile_columns >= 0)
443  codecctl_int(avctx, VP9E_SET_TILE_COLUMNS, ctx->tile_columns);
444  if (ctx->tile_rows >= 0)
445  codecctl_int(avctx, VP9E_SET_TILE_ROWS, ctx->tile_rows);
446  if (ctx->frame_parallel >= 0)
447  codecctl_int(avctx, VP9E_SET_FRAME_PARALLEL_DECODING, ctx->frame_parallel);
448  }
449 #endif
450 
451  av_log(avctx, AV_LOG_DEBUG, "Using deadline: %d\n", ctx->deadline);
452 
453  //provide dummy value to initialize wrapper, values will be updated each _encode()
454  vpx_img_wrap(&ctx->rawimg, VPX_IMG_FMT_I420, avctx->width, avctx->height, 1,
455  (unsigned char*)1);
456 
457  if (ctx->is_alpha)
458  vpx_img_wrap(&ctx->rawimg_alpha, VPX_IMG_FMT_I420, avctx->width, avctx->height, 1,
459  (unsigned char*)1);
460 
461  avctx->coded_frame = av_frame_alloc();
462  if (!avctx->coded_frame) {
463  av_log(avctx, AV_LOG_ERROR, "Error allocating coded frame\n");
464  vp8_free(avctx);
465  return AVERROR(ENOMEM);
466  }
467  return 0;
468 }
469 
470 static inline void cx_pktcpy(struct FrameListData *dst,
471  const struct vpx_codec_cx_pkt *src,
472  const struct vpx_codec_cx_pkt *src_alpha,
473  VP8Context *ctx)
474 {
475  dst->pts = src->data.frame.pts;
476  dst->duration = src->data.frame.duration;
477  dst->flags = src->data.frame.flags;
478  dst->sz = src->data.frame.sz;
479  dst->buf = src->data.frame.buf;
480  dst->have_sse = 0;
481  /* For alt-ref frame, don't store PSNR or increment frame_number */
482  if (!(dst->flags & VPX_FRAME_IS_INVISIBLE)) {
483  dst->frame_number = ++ctx->frame_number;
484  dst->have_sse = ctx->have_sse;
485  if (ctx->have_sse) {
486  /* associate last-seen SSE to the frame. */
487  /* Transfers ownership from ctx to dst. */
488  /* WARNING! This makes the assumption that PSNR_PKT comes
489  just before the frame it refers to! */
490  memcpy(dst->sse, ctx->sse, sizeof(dst->sse));
491  ctx->have_sse = 0;
492  }
493  } else {
494  dst->frame_number = -1; /* sanity marker */
495  }
496  if (src_alpha) {
497  dst->buf_alpha = src_alpha->data.frame.buf;
498  dst->sz_alpha = src_alpha->data.frame.sz;
499  }
500  else {
501  dst->buf_alpha = NULL;
502  dst->sz_alpha = 0;
503  }
504 }
505 
506 /**
507  * Store coded frame information in format suitable for return from encode2().
508  *
509  * Write information from @a cx_frame to @a pkt
510  * @return packet data size on success
511  * @return a negative AVERROR on error
512  */
513 static int storeframe(AVCodecContext *avctx, struct FrameListData *cx_frame,
514  AVPacket *pkt, AVFrame *coded_frame)
515 {
516  int ret = ff_alloc_packet2(avctx, pkt, cx_frame->sz);
517  uint8_t *side_data;
518  if (ret >= 0) {
519  memcpy(pkt->data, cx_frame->buf, pkt->size);
520  pkt->pts = pkt->dts = cx_frame->pts;
521  coded_frame->pts = cx_frame->pts;
522  coded_frame->key_frame = !!(cx_frame->flags & VPX_FRAME_IS_KEY);
523 
524  if (coded_frame->key_frame) {
525  coded_frame->pict_type = AV_PICTURE_TYPE_I;
526  pkt->flags |= AV_PKT_FLAG_KEY;
527  } else
528  coded_frame->pict_type = AV_PICTURE_TYPE_P;
529 
530  if (cx_frame->have_sse) {
531  int i;
532  /* Beware of the Y/U/V/all order! */
533  coded_frame->error[0] = cx_frame->sse[1];
534  coded_frame->error[1] = cx_frame->sse[2];
535  coded_frame->error[2] = cx_frame->sse[3];
536  coded_frame->error[3] = 0; // alpha
537  for (i = 0; i < 4; ++i) {
538  avctx->error[i] += coded_frame->error[i];
539  }
540  cx_frame->have_sse = 0;
541  }
542  if (cx_frame->sz_alpha > 0) {
543  side_data = av_packet_new_side_data(pkt,
544  AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
545  cx_frame->sz_alpha + 8);
546  if(side_data == NULL) {
547  av_free_packet(pkt);
548  av_free(pkt);
549  return AVERROR(ENOMEM);
550  }
551  AV_WB64(side_data, 1);
552  memcpy(side_data + 8, cx_frame->buf_alpha, cx_frame->sz_alpha);
553  }
554  } else {
555  return ret;
556  }
557  return pkt->size;
558 }
559 
560 /**
561  * Queue multiple output frames from the encoder, returning the front-most.
562  * In cases where vpx_codec_get_cx_data() returns more than 1 frame append
563  * the frame queue. Return the head frame if available.
564  * @return Stored frame size
565  * @return AVERROR(EINVAL) on output size error
566  * @return AVERROR(ENOMEM) on coded frame queue data allocation error
567  */
568 static int queue_frames(AVCodecContext *avctx, AVPacket *pkt_out,
569  AVFrame *coded_frame)
570 {
571  VP8Context *ctx = avctx->priv_data;
572  const struct vpx_codec_cx_pkt *pkt;
573  const struct vpx_codec_cx_pkt *pkt_alpha = NULL;
574  const void *iter = NULL;
575  const void *iter_alpha = NULL;
576  int size = 0;
577 
578  if (ctx->coded_frame_list) {
579  struct FrameListData *cx_frame = ctx->coded_frame_list;
580  /* return the leading frame if we've already begun queueing */
581  size = storeframe(avctx, cx_frame, pkt_out, coded_frame);
582  if (size < 0)
583  return size;
584  ctx->coded_frame_list = cx_frame->next;
585  free_coded_frame(cx_frame);
586  }
587 
588  /* consume all available output from the encoder before returning. buffers
589  are only good through the next vpx_codec call */
590  while ((pkt = vpx_codec_get_cx_data(&ctx->encoder, &iter)) &&
591  (!ctx->is_alpha ||
592  (ctx->is_alpha && (pkt_alpha = vpx_codec_get_cx_data(&ctx->encoder_alpha, &iter_alpha))))) {
593  switch (pkt->kind) {
594  case VPX_CODEC_CX_FRAME_PKT:
595  if (!size) {
596  struct FrameListData cx_frame;
597 
598  /* avoid storing the frame when the list is empty and we haven't yet
599  provided a frame for output */
600  av_assert0(!ctx->coded_frame_list);
601  cx_pktcpy(&cx_frame, pkt, pkt_alpha, ctx);
602  size = storeframe(avctx, &cx_frame, pkt_out, coded_frame);
603  if (size < 0)
604  return size;
605  } else {
606  struct FrameListData *cx_frame =
607  av_malloc(sizeof(struct FrameListData));
608 
609  if (!cx_frame) {
610  av_log(avctx, AV_LOG_ERROR,
611  "Frame queue element alloc failed\n");
612  return AVERROR(ENOMEM);
613  }
614  cx_pktcpy(cx_frame, pkt, pkt_alpha, ctx);
615  cx_frame->buf = av_malloc(cx_frame->sz);
616 
617  if (!cx_frame->buf) {
618  av_log(avctx, AV_LOG_ERROR,
619  "Data buffer alloc (%zu bytes) failed\n",
620  cx_frame->sz);
621  av_free(cx_frame);
622  return AVERROR(ENOMEM);
623  }
624  memcpy(cx_frame->buf, pkt->data.frame.buf, pkt->data.frame.sz);
625  if (ctx->is_alpha) {
626  cx_frame->buf_alpha = av_malloc(cx_frame->sz_alpha);
627  if (!cx_frame->buf_alpha) {
628  av_log(avctx, AV_LOG_ERROR,
629  "Data buffer alloc (%zu bytes) failed\n",
630  cx_frame->sz_alpha);
631  av_free(cx_frame);
632  return AVERROR(ENOMEM);
633  }
634  memcpy(cx_frame->buf_alpha, pkt_alpha->data.frame.buf, pkt_alpha->data.frame.sz);
635  }
636  coded_frame_add(&ctx->coded_frame_list, cx_frame);
637  }
638  break;
639  case VPX_CODEC_STATS_PKT: {
640  struct vpx_fixed_buf *stats = &ctx->twopass_stats;
641  int err;
642  if ((err = av_reallocp(&stats->buf,
643  stats->sz +
644  pkt->data.twopass_stats.sz)) < 0) {
645  stats->sz = 0;
646  av_log(avctx, AV_LOG_ERROR, "Stat buffer realloc failed\n");
647  return err;
648  }
649  memcpy((uint8_t*)stats->buf + stats->sz,
650  pkt->data.twopass_stats.buf, pkt->data.twopass_stats.sz);
651  stats->sz += pkt->data.twopass_stats.sz;
652  break;
653  }
654  case VPX_CODEC_PSNR_PKT:
655  av_assert0(!ctx->have_sse);
656  ctx->sse[0] = pkt->data.psnr.sse[0];
657  ctx->sse[1] = pkt->data.psnr.sse[1];
658  ctx->sse[2] = pkt->data.psnr.sse[2];
659  ctx->sse[3] = pkt->data.psnr.sse[3];
660  ctx->have_sse = 1;
661  break;
662  case VPX_CODEC_CUSTOM_PKT:
663  //ignore unsupported/unrecognized packet types
664  break;
665  }
666  }
667 
668  return size;
669 }
670 
671 static int vp8_encode(AVCodecContext *avctx, AVPacket *pkt,
672  const AVFrame *frame, int *got_packet)
673 {
674  VP8Context *ctx = avctx->priv_data;
675  struct vpx_image *rawimg = NULL;
676  struct vpx_image *rawimg_alpha = NULL;
677  int64_t timestamp = 0;
678  int res, coded_size;
679  vpx_enc_frame_flags_t flags = 0;
680 
681  if (frame) {
682  rawimg = &ctx->rawimg;
683  rawimg->planes[VPX_PLANE_Y] = frame->data[0];
684  rawimg->planes[VPX_PLANE_U] = frame->data[1];
685  rawimg->planes[VPX_PLANE_V] = frame->data[2];
686  rawimg->stride[VPX_PLANE_Y] = frame->linesize[0];
687  rawimg->stride[VPX_PLANE_U] = frame->linesize[1];
688  rawimg->stride[VPX_PLANE_V] = frame->linesize[2];
689  if (ctx->is_alpha) {
690  uint8_t *u_plane, *v_plane;
691  rawimg_alpha = &ctx->rawimg_alpha;
692  rawimg_alpha->planes[VPX_PLANE_Y] = frame->data[3];
693  u_plane = av_malloc(frame->linesize[1] * frame->height);
694  memset(u_plane, 0x80, frame->linesize[1] * frame->height);
695  rawimg_alpha->planes[VPX_PLANE_U] = u_plane;
696  v_plane = av_malloc(frame->linesize[2] * frame->height);
697  memset(v_plane, 0x80, frame->linesize[2] * frame->height);
698  rawimg_alpha->planes[VPX_PLANE_V] = v_plane;
699  rawimg_alpha->stride[VPX_PLANE_Y] = frame->linesize[0];
700  rawimg_alpha->stride[VPX_PLANE_U] = frame->linesize[1];
701  rawimg_alpha->stride[VPX_PLANE_V] = frame->linesize[2];
702  }
703  timestamp = frame->pts;
704  if (frame->pict_type == AV_PICTURE_TYPE_I)
705  flags |= VPX_EFLAG_FORCE_KF;
706  }
707 
708  res = vpx_codec_encode(&ctx->encoder, rawimg, timestamp,
709  avctx->ticks_per_frame, flags, ctx->deadline);
710  if (res != VPX_CODEC_OK) {
711  log_encoder_error(avctx, "Error encoding frame");
712  return AVERROR_INVALIDDATA;
713  }
714 
715  if (ctx->is_alpha) {
716  res = vpx_codec_encode(&ctx->encoder_alpha, rawimg_alpha, timestamp,
717  avctx->ticks_per_frame, flags, ctx->deadline);
718  if (res != VPX_CODEC_OK) {
719  log_encoder_error(avctx, "Error encoding alpha frame");
720  return AVERROR_INVALIDDATA;
721  }
722  }
723 
724  coded_size = queue_frames(avctx, pkt, avctx->coded_frame);
725 
726  if (!frame && avctx->flags & CODEC_FLAG_PASS1) {
727  unsigned int b64_size = AV_BASE64_SIZE(ctx->twopass_stats.sz);
728 
729  avctx->stats_out = av_malloc(b64_size);
730  if (!avctx->stats_out) {
731  av_log(avctx, AV_LOG_ERROR, "Stat buffer alloc (%d bytes) failed\n",
732  b64_size);
733  return AVERROR(ENOMEM);
734  }
735  av_base64_encode(avctx->stats_out, b64_size, ctx->twopass_stats.buf,
736  ctx->twopass_stats.sz);
737  }
738 
739  if (rawimg_alpha) {
740  av_free(rawimg_alpha->planes[VPX_PLANE_U]);
741  av_free(rawimg_alpha->planes[VPX_PLANE_V]);
742  }
743 
744  *got_packet = !!coded_size;
745  return 0;
746 }
747 
748 #define OFFSET(x) offsetof(VP8Context, x)
749 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
750 
751 #ifndef VPX_ERROR_RESILIENT_DEFAULT
752 #define VPX_ERROR_RESILIENT_DEFAULT 1
753 #define VPX_ERROR_RESILIENT_PARTITIONS 2
754 #endif
755 
756 #define COMMON_OPTIONS \
757  { "cpu-used", "Quality/Speed ratio modifier", OFFSET(cpu_used), AV_OPT_TYPE_INT, {.i64 = INT_MIN}, INT_MIN, INT_MAX, VE}, \
758  { "auto-alt-ref", "Enable use of alternate reference " \
759  "frames (2-pass only)", OFFSET(auto_alt_ref), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, VE}, \
760  { "lag-in-frames", "Number of frames to look ahead for " \
761  "alternate reference frame selection", OFFSET(lag_in_frames), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VE}, \
762  { "arnr-maxframes", "altref noise reduction max frame count", OFFSET(arnr_max_frames), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VE}, \
763  { "arnr-strength", "altref noise reduction filter strength", OFFSET(arnr_strength), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VE}, \
764  { "arnr-type", "altref noise reduction filter type", OFFSET(arnr_type), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VE, "arnr_type"}, \
765  { "backward", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1}, 0, 0, VE, "arnr_type" }, \
766  { "forward", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2}, 0, 0, VE, "arnr_type" }, \
767  { "centered", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 3}, 0, 0, VE, "arnr_type" }, \
768  { "deadline", "Time to spend encoding, in microseconds.", OFFSET(deadline), AV_OPT_TYPE_INT, {.i64 = VPX_DL_GOOD_QUALITY}, INT_MIN, INT_MAX, VE, "quality"}, \
769  { "best", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VPX_DL_BEST_QUALITY}, 0, 0, VE, "quality"}, \
770  { "good", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VPX_DL_GOOD_QUALITY}, 0, 0, VE, "quality"}, \
771  { "realtime", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VPX_DL_REALTIME}, 0, 0, VE, "quality"}, \
772  { "error-resilient", "Error resilience configuration", OFFSET(error_resilient), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, VE, "er"}, \
773  { "max-intra-rate", "Maximum I-frame bitrate (pct) 0=unlimited", OFFSET(max_intra_rate), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VE}, \
774  { "default", "Improve resiliency against losses of whole frames", 0, AV_OPT_TYPE_CONST, {.i64 = VPX_ERROR_RESILIENT_DEFAULT}, 0, 0, VE, "er"}, \
775  { "partitions", "The frame partitions are independently decodable " \
776  "by the bool decoder, meaning that partitions can be decoded even " \
777  "though earlier partitions have been lost. Note that intra predicition" \
778  " is still done over the partition boundary.", 0, AV_OPT_TYPE_CONST, {.i64 = VPX_ERROR_RESILIENT_PARTITIONS}, 0, 0, VE, "er"}, \
779  { "crf", "Select the quality for constant quality mode", offsetof(VP8Context, crf), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 63, VE }, \
780 
781 #define LEGACY_OPTIONS \
782  {"speed", "", offsetof(VP8Context, cpu_used), AV_OPT_TYPE_INT, {.i64 = 1}, -16, 16, VE}, \
783  {"quality", "", offsetof(VP8Context, deadline), AV_OPT_TYPE_INT, {.i64 = VPX_DL_GOOD_QUALITY}, INT_MIN, INT_MAX, VE, "quality"}, \
784  {"vp8flags", "", offsetof(VP8Context, flags), FF_OPT_TYPE_FLAGS, {.i64 = 0}, 0, UINT_MAX, VE, "flags"}, \
785  {"error_resilient", "enable error resilience", 0, FF_OPT_TYPE_CONST, {.dbl = VP8F_ERROR_RESILIENT}, INT_MIN, INT_MAX, VE, "flags"}, \
786  {"altref", "enable use of alternate reference frames (VP8/2-pass only)", 0, FF_OPT_TYPE_CONST, {.dbl = VP8F_AUTO_ALT_REF}, INT_MIN, INT_MAX, VE, "flags"}, \
787  {"arnr_max_frames", "altref noise reduction max frame count", offsetof(VP8Context, arnr_max_frames), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 15, VE}, \
788  {"arnr_strength", "altref noise reduction filter strength", offsetof(VP8Context, arnr_strength), AV_OPT_TYPE_INT, {.i64 = 3}, 0, 6, VE}, \
789  {"arnr_type", "altref noise reduction filter type", offsetof(VP8Context, arnr_type), AV_OPT_TYPE_INT, {.i64 = 3}, 1, 3, VE}, \
790  {"rc_lookahead", "Number of frames to look ahead for alternate reference frame selection", offsetof(VP8Context, lag_in_frames), AV_OPT_TYPE_INT, {.i64 = 25}, 0, 25, VE}, \
791 
792 #if CONFIG_LIBVPX_VP8_ENCODER
793 static const AVOption vp8_options[] = {
794  COMMON_OPTIONS
795  LEGACY_OPTIONS
796  { NULL }
797 };
798 #endif
799 
800 #if CONFIG_LIBVPX_VP9_ENCODER
801 static const AVOption vp9_options[] = {
802  COMMON_OPTIONS
803  { "lossless", "Lossless mode", OFFSET(lossless), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, VE},
804  { "tile-columns", "Number of tile columns to use, log2", OFFSET(tile_columns), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 6, VE},
805  { "tile-rows", "Number of tile rows to use, log2", OFFSET(tile_rows), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 2, VE},
806  { "frame-parallel", "Enable frame parallel decodability features", OFFSET(frame_parallel), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, VE},
807  LEGACY_OPTIONS
808  { NULL }
809 };
810 #endif
811 
812 #undef COMMON_OPTIONS
813 #undef LEGACY_OPTIONS
814 
815 static const AVCodecDefault defaults[] = {
816  { "qmin", "-1" },
817  { "qmax", "-1" },
818  { "g", "-1" },
819  { "keyint_min", "-1" },
820  { NULL },
821 };
822 
823 #if CONFIG_LIBVPX_VP8_ENCODER
824 static av_cold int vp8_init(AVCodecContext *avctx)
825 {
826  return vpx_init(avctx, &vpx_codec_vp8_cx_algo);
827 }
828 
829 static const AVClass class_vp8 = {
830  .class_name = "libvpx-vp8 encoder",
831  .item_name = av_default_item_name,
832  .option = vp8_options,
833  .version = LIBAVUTIL_VERSION_INT,
834 };
835 
836 AVCodec ff_libvpx_vp8_encoder = {
837  .name = "libvpx",
838  .long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),
839  .type = AVMEDIA_TYPE_VIDEO,
840  .id = AV_CODEC_ID_VP8,
841  .priv_data_size = sizeof(VP8Context),
842  .init = vp8_init,
843  .encode2 = vp8_encode,
844  .close = vp8_free,
845  .capabilities = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,
846  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_NONE },
847  .priv_class = &class_vp8,
848  .defaults = defaults,
849 };
850 #endif /* CONFIG_LIBVPX_VP8_ENCODER */
851 
852 #if CONFIG_LIBVPX_VP9_ENCODER
853 static av_cold int vp9_init(AVCodecContext *avctx)
854 {
855  return vpx_init(avctx, &vpx_codec_vp9_cx_algo);
856 }
857 
858 static const AVClass class_vp9 = {
859  .class_name = "libvpx-vp9 encoder",
860  .item_name = av_default_item_name,
861  .option = vp9_options,
862  .version = LIBAVUTIL_VERSION_INT,
863 };
864 
865 AVCodec ff_libvpx_vp9_encoder = {
866  .name = "libvpx-vp9",
867  .long_name = NULL_IF_CONFIG_SMALL("libvpx VP9"),
868  .type = AVMEDIA_TYPE_VIDEO,
869  .id = AV_CODEC_ID_VP9,
870  .priv_data_size = sizeof(VP8Context),
871  .init = vp9_init,
872  .encode2 = vp8_encode,
873  .close = vp8_free,
874  .capabilities = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,
875  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
876  .priv_class = &class_vp9,
877  .defaults = defaults,
878  .init_static_data = ff_vp9_init_static,
879 };
880 #endif /* CONFIG_LIBVPX_VP9_ENCODER */
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