2 * Copyright (c) 2010, Google, Inc.
4 * This file is part of FFmpeg.
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.
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.
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
23 * VP8 encoder support via libvpx
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>
32 #include "libavutil/base64.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/mathematics.h"
37 * Portion of struct vpx_codec_cx_pkt from vpx_encoder.h.
38 * One encoded frame returned from the library.
40 struct FrameListData {
41 void *buf; /**< compressed data buffer */
42 size_t sz; /**< length of compressed data */
43 int64_t pts; /**< time stamp to show frame
44 (in timebase units) */
45 unsigned long duration; /**< duration to show frame
46 (in timebase units) */
47 uint32_t flags; /**< flags for this frame */
48 struct FrameListData *next;
51 typedef struct VP8EncoderContext {
53 struct vpx_codec_ctx encoder;
54 struct vpx_image rawimg;
55 struct vpx_fixed_buf twopass_stats;
56 int deadline; //i.e., RT/GOOD/BEST
57 struct FrameListData *coded_frame_list;
62 * VP8 specific flags, see VP8F_* below.
65 #define VP8F_ERROR_RESILIENT 0x00000001 ///< Enable measures appropriate for streaming over lossy links
66 #define VP8F_AUTO_ALT_REF 0x00000002 ///< Enable automatic alternate reference frame generation
73 #define V AV_OPT_FLAG_VIDEO_PARAM
74 #define E AV_OPT_FLAG_ENCODING_PARAM
76 static const AVOption options[]={
77 {"speed", "", offsetof(VP8Context, cpuused), FF_OPT_TYPE_INT, 3, -16, 16, V|E},
78 {"quality", "", offsetof(VP8Context, deadline), FF_OPT_TYPE_INT, VPX_DL_GOOD_QUALITY, INT_MIN, INT_MAX, V|E, "quality"},
79 {"best", NULL, 0, FF_OPT_TYPE_CONST, VPX_DL_BEST_QUALITY, INT_MIN, INT_MAX, V|E, "quality"},
80 {"good", NULL, 0, FF_OPT_TYPE_CONST, VPX_DL_GOOD_QUALITY, INT_MIN, INT_MAX, V|E, "quality"},
81 {"realtime", NULL, 0, FF_OPT_TYPE_CONST, VPX_DL_REALTIME, INT_MIN, INT_MAX, V|E, "quality"},
82 {"vp8flags", "", offsetof(VP8Context, flags), FF_OPT_TYPE_FLAGS, 0, 0, UINT_MAX, V|E, "flags"},
83 {"error_resilient", "enable error resilience", 0, FF_OPT_TYPE_CONST, VP8F_ERROR_RESILIENT, INT_MIN, INT_MAX, V|E, "flags"},
84 {"altref", "enable use of alternate reference frames (VP8/2-pass only)", 0, FF_OPT_TYPE_CONST, VP8F_AUTO_ALT_REF, INT_MIN, INT_MAX, V|E, "flags"},
85 {"arnr_max_frames", "altref noise reduction max frame count", offsetof(VP8Context, arnr_max_frames), FF_OPT_TYPE_INT, 0, 0, 15, V|E},
86 {"arnr_strength", "altref noise reduction filter strength", offsetof(VP8Context, arnr_strength), FF_OPT_TYPE_INT, 3, 0, 6, V|E},
87 {"arnr_type", "altref noise reduction filter type", offsetof(VP8Context, arnr_type), FF_OPT_TYPE_INT, 3, 1, 3, V|E},
90 static const AVClass class = { "libvpx", av_default_item_name, options, LIBAVUTIL_VERSION_INT };
95 /** String mappings for enum vp8e_enc_control_id */
96 static const char *ctlidstr[] = {
97 [VP8E_UPD_ENTROPY] = "VP8E_UPD_ENTROPY",
98 [VP8E_UPD_REFERENCE] = "VP8E_UPD_REFERENCE",
99 [VP8E_USE_REFERENCE] = "VP8E_USE_REFERENCE",
100 [VP8E_SET_ROI_MAP] = "VP8E_SET_ROI_MAP",
101 [VP8E_SET_ACTIVEMAP] = "VP8E_SET_ACTIVEMAP",
102 [VP8E_SET_SCALEMODE] = "VP8E_SET_SCALEMODE",
103 [VP8E_SET_CPUUSED] = "VP8E_SET_CPUUSED",
104 [VP8E_SET_ENABLEAUTOALTREF] = "VP8E_SET_ENABLEAUTOALTREF",
105 [VP8E_SET_NOISE_SENSITIVITY] = "VP8E_SET_NOISE_SENSITIVITY",
106 [VP8E_SET_SHARPNESS] = "VP8E_SET_SHARPNESS",
107 [VP8E_SET_STATIC_THRESHOLD] = "VP8E_SET_STATIC_THRESHOLD",
108 [VP8E_SET_TOKEN_PARTITIONS] = "VP8E_SET_TOKEN_PARTITIONS",
109 [VP8E_GET_LAST_QUANTIZER] = "VP8E_GET_LAST_QUANTIZER",
110 [VP8E_SET_ARNR_MAXFRAMES] = "VP8E_SET_ARNR_MAXFRAMES",
111 [VP8E_SET_ARNR_STRENGTH] = "VP8E_SET_ARNR_STRENGTH",
112 [VP8E_SET_ARNR_TYPE] = "VP8E_SET_ARNR_TYPE",
113 [VP8E_SET_CQ_LEVEL] = "VP8E_SET_CQ_LEVEL",
116 static av_cold void log_encoder_error(AVCodecContext *avctx, const char *desc)
118 VP8Context *ctx = avctx->priv_data;
119 const char *error = vpx_codec_error(&ctx->encoder);
120 const char *detail = vpx_codec_error_detail(&ctx->encoder);
122 av_log(avctx, AV_LOG_ERROR, "%s: %s\n", desc, error);
124 av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n", detail);
127 static av_cold void dump_enc_cfg(AVCodecContext *avctx,
128 const struct vpx_codec_enc_cfg *cfg)
131 int level = AV_LOG_DEBUG;
133 av_log(avctx, level, "vpx_codec_enc_cfg\n");
134 av_log(avctx, level, "generic settings\n"
135 " %*s%u\n %*s%u\n %*s%u\n %*s%u\n %*s%u\n"
136 " %*s{%u/%u}\n %*s%u\n %*s%d\n %*s%u\n",
137 width, "g_usage:", cfg->g_usage,
138 width, "g_threads:", cfg->g_threads,
139 width, "g_profile:", cfg->g_profile,
140 width, "g_w:", cfg->g_w,
141 width, "g_h:", cfg->g_h,
142 width, "g_timebase:", cfg->g_timebase.num, cfg->g_timebase.den,
143 width, "g_error_resilient:", cfg->g_error_resilient,
144 width, "g_pass:", cfg->g_pass,
145 width, "g_lag_in_frames:", cfg->g_lag_in_frames);
146 av_log(avctx, level, "rate control settings\n"
147 " %*s%u\n %*s%u\n %*s%u\n %*s%u\n"
148 " %*s%d\n %*s%p(%zu)\n %*s%u\n",
149 width, "rc_dropframe_thresh:", cfg->rc_dropframe_thresh,
150 width, "rc_resize_allowed:", cfg->rc_resize_allowed,
151 width, "rc_resize_up_thresh:", cfg->rc_resize_up_thresh,
152 width, "rc_resize_down_thresh:", cfg->rc_resize_down_thresh,
153 width, "rc_end_usage:", cfg->rc_end_usage,
154 width, "rc_twopass_stats_in:", cfg->rc_twopass_stats_in.buf, cfg->rc_twopass_stats_in.sz,
155 width, "rc_target_bitrate:", cfg->rc_target_bitrate);
156 av_log(avctx, level, "quantizer settings\n"
158 width, "rc_min_quantizer:", cfg->rc_min_quantizer,
159 width, "rc_max_quantizer:", cfg->rc_max_quantizer);
160 av_log(avctx, level, "bitrate tolerance\n"
162 width, "rc_undershoot_pct:", cfg->rc_undershoot_pct,
163 width, "rc_overshoot_pct:", cfg->rc_overshoot_pct);
164 av_log(avctx, level, "decoder buffer model\n"
165 " %*s%u\n %*s%u\n %*s%u\n",
166 width, "rc_buf_sz:", cfg->rc_buf_sz,
167 width, "rc_buf_initial_sz:", cfg->rc_buf_initial_sz,
168 width, "rc_buf_optimal_sz:", cfg->rc_buf_optimal_sz);
169 av_log(avctx, level, "2 pass rate control settings\n"
170 " %*s%u\n %*s%u\n %*s%u\n",
171 width, "rc_2pass_vbr_bias_pct:", cfg->rc_2pass_vbr_bias_pct,
172 width, "rc_2pass_vbr_minsection_pct:", cfg->rc_2pass_vbr_minsection_pct,
173 width, "rc_2pass_vbr_maxsection_pct:", cfg->rc_2pass_vbr_maxsection_pct);
174 av_log(avctx, level, "keyframing settings\n"
175 " %*s%d\n %*s%u\n %*s%u\n",
176 width, "kf_mode:", cfg->kf_mode,
177 width, "kf_min_dist:", cfg->kf_min_dist,
178 width, "kf_max_dist:", cfg->kf_max_dist);
179 av_log(avctx, level, "\n");
182 static void coded_frame_add(void *list, struct FrameListData *cx_frame)
184 struct FrameListData **p = list;
189 cx_frame->next = NULL;
192 static av_cold void free_coded_frame(struct FrameListData *cx_frame)
194 av_freep(&cx_frame->buf);
198 static av_cold void free_frame_list(struct FrameListData *list)
200 struct FrameListData *p = list;
209 static av_cold int codecctl_int(AVCodecContext *avctx,
210 enum vp8e_enc_control_id id, int val)
212 VP8Context *ctx = avctx->priv_data;
217 snprintf(buf, sizeof(buf), "%s:", ctlidstr[id]);
218 av_log(avctx, AV_LOG_DEBUG, " %*s%d\n", width, buf, val);
220 res = vpx_codec_control(&ctx->encoder, id, val);
221 if (res != VPX_CODEC_OK) {
222 snprintf(buf, sizeof(buf), "Failed to set %s codec control",
224 log_encoder_error(avctx, buf);
227 return res == VPX_CODEC_OK ? 0 : AVERROR(EINVAL);
230 static av_cold int vp8_free(AVCodecContext *avctx)
232 VP8Context *ctx = avctx->priv_data;
234 vpx_codec_destroy(&ctx->encoder);
235 av_freep(&ctx->twopass_stats.buf);
236 av_freep(&avctx->coded_frame);
237 av_freep(&avctx->stats_out);
238 free_frame_list(ctx->coded_frame_list);
242 static av_cold int vp8_init(AVCodecContext *avctx)
244 VP8Context *ctx = avctx->priv_data;
245 const struct vpx_codec_iface *iface = &vpx_codec_vp8_cx_algo;
246 struct vpx_codec_enc_cfg enccfg;
249 av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str());
250 av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config());
252 if ((res = vpx_codec_enc_config_default(iface, &enccfg, 0)) != VPX_CODEC_OK) {
253 av_log(avctx, AV_LOG_ERROR, "Failed to get config: %s\n",
254 vpx_codec_err_to_string(res));
255 return AVERROR(EINVAL);
257 dump_enc_cfg(avctx, &enccfg);
259 enccfg.g_w = avctx->width;
260 enccfg.g_h = avctx->height;
261 enccfg.g_timebase.num = avctx->time_base.num;
262 enccfg.g_timebase.den = avctx->time_base.den;
263 enccfg.g_threads = avctx->thread_count;
264 enccfg.g_lag_in_frames= FFMIN(avctx->rc_lookahead, 25); //0-25, avoids init failure
266 if (avctx->flags & CODEC_FLAG_PASS1)
267 enccfg.g_pass = VPX_RC_FIRST_PASS;
268 else if (avctx->flags & CODEC_FLAG_PASS2)
269 enccfg.g_pass = VPX_RC_LAST_PASS;
271 enccfg.g_pass = VPX_RC_ONE_PASS;
273 if (avctx->rc_min_rate == avctx->rc_max_rate &&
274 avctx->rc_min_rate == avctx->bit_rate)
275 enccfg.rc_end_usage = VPX_CBR;
277 enccfg.rc_end_usage = VPX_CQ;
278 enccfg.rc_target_bitrate = av_rescale_rnd(avctx->bit_rate, 1, 1000,
281 enccfg.rc_min_quantizer = avctx->qmin;
282 enccfg.rc_max_quantizer = avctx->qmax;
283 enccfg.rc_dropframe_thresh = avctx->frame_skip_threshold;
285 //0-100 (0 => CBR, 100 => VBR)
286 enccfg.rc_2pass_vbr_bias_pct = round(avctx->qcompress * 100);
287 enccfg.rc_2pass_vbr_minsection_pct =
288 avctx->rc_min_rate * 100LL / avctx->bit_rate;
289 if (avctx->rc_max_rate)
290 enccfg.rc_2pass_vbr_maxsection_pct =
291 avctx->rc_max_rate * 100LL / avctx->bit_rate;
293 if (avctx->rc_buffer_size)
295 avctx->rc_buffer_size * 1000LL / avctx->bit_rate;
296 if (avctx->rc_initial_buffer_occupancy)
297 enccfg.rc_buf_initial_sz =
298 avctx->rc_initial_buffer_occupancy * 1000LL / avctx->bit_rate;
299 enccfg.rc_buf_optimal_sz = enccfg.rc_buf_sz * 5 / 6;
300 enccfg.rc_undershoot_pct = round(avctx->rc_buffer_aggressivity * 100);
302 //_enc_init() will balk if kf_min_dist differs from max w/VPX_KF_AUTO
303 if (avctx->keyint_min == avctx->gop_size)
304 enccfg.kf_min_dist = avctx->keyint_min;
305 enccfg.kf_max_dist = avctx->gop_size;
307 if (enccfg.g_pass == VPX_RC_FIRST_PASS)
308 enccfg.g_lag_in_frames = 0;
309 else if (enccfg.g_pass == VPX_RC_LAST_PASS) {
312 if (!avctx->stats_in) {
313 av_log(avctx, AV_LOG_ERROR, "No stats file for second pass\n");
314 return AVERROR_INVALIDDATA;
317 ctx->twopass_stats.sz = strlen(avctx->stats_in) * 3 / 4;
318 ctx->twopass_stats.buf = av_malloc(ctx->twopass_stats.sz);
319 if (!ctx->twopass_stats.buf) {
320 av_log(avctx, AV_LOG_ERROR,
321 "Stat buffer alloc (%zu bytes) failed\n",
322 ctx->twopass_stats.sz);
323 return AVERROR(ENOMEM);
325 decode_size = av_base64_decode(ctx->twopass_stats.buf, avctx->stats_in,
326 ctx->twopass_stats.sz);
327 if (decode_size < 0) {
328 av_log(avctx, AV_LOG_ERROR, "Stat buffer decode failed\n");
329 return AVERROR_INVALIDDATA;
332 ctx->twopass_stats.sz = decode_size;
333 enccfg.rc_twopass_stats_in = ctx->twopass_stats;
336 /* 0-3: For non-zero values the encoder increasingly optimizes for reduced
337 complexity playback on low powered devices at the expense of encode
339 if (avctx->profile != FF_PROFILE_UNKNOWN)
340 enccfg.g_profile = avctx->profile;
342 enccfg.g_error_resilient = ctx->flags & VP8F_ERROR_RESILIENT;
344 dump_enc_cfg(avctx, &enccfg);
345 /* Construct Encoder Context */
346 res = vpx_codec_enc_init(&ctx->encoder, iface, &enccfg, 0);
347 if (res != VPX_CODEC_OK) {
348 log_encoder_error(avctx, "Failed to initialize encoder");
349 return AVERROR(EINVAL);
352 //codec control failures are currently treated only as warnings
353 av_log(avctx, AV_LOG_DEBUG, "vpx_codec_control\n");
354 codecctl_int(avctx, VP8E_SET_CPUUSED, ctx->cpuused);
355 codecctl_int(avctx, VP8E_SET_NOISE_SENSITIVITY, avctx->noise_reduction);
356 codecctl_int(avctx, VP8E_SET_TOKEN_PARTITIONS, av_log2(avctx->slices));
357 codecctl_int(avctx, VP8E_SET_STATIC_THRESHOLD, avctx->mb_threshold);
358 codecctl_int(avctx, VP8E_SET_CQ_LEVEL, (int)avctx->crf);
359 codecctl_int(avctx, VP8E_SET_ENABLEAUTOALTREF, !!(ctx->flags & VP8F_AUTO_ALT_REF));
360 codecctl_int(avctx, VP8E_SET_ARNR_MAXFRAMES, ctx->arnr_max_frames);
361 codecctl_int(avctx, VP8E_SET_ARNR_STRENGTH, ctx->arnr_strength);
362 codecctl_int(avctx, VP8E_SET_ARNR_TYPE, ctx->arnr_type);
364 av_log(avctx, AV_LOG_DEBUG, "Using deadline: %d\n", ctx->deadline);
366 //provide dummy value to initialize wrapper, values will be updated each _encode()
367 vpx_img_wrap(&ctx->rawimg, VPX_IMG_FMT_I420, avctx->width, avctx->height, 1,
370 avctx->coded_frame = avcodec_alloc_frame();
371 if (!avctx->coded_frame) {
372 av_log(avctx, AV_LOG_ERROR, "Error allocating coded frame\n");
374 return AVERROR(ENOMEM);
379 static inline void cx_pktcpy(struct FrameListData *dst,
380 const struct vpx_codec_cx_pkt *src)
382 dst->pts = src->data.frame.pts;
383 dst->duration = src->data.frame.duration;
384 dst->flags = src->data.frame.flags;
385 dst->sz = src->data.frame.sz;
386 dst->buf = src->data.frame.buf;
390 * Store coded frame information in format suitable for return from encode().
392 * Write buffer information from @a cx_frame to @a buf & @a buf_size.
393 * Timing/frame details to @a coded_frame.
394 * @return Frame size written to @a buf on success
395 * @return AVERROR(EINVAL) on error
397 static int storeframe(AVCodecContext *avctx, struct FrameListData *cx_frame,
398 uint8_t *buf, int buf_size, AVFrame *coded_frame)
400 if ((int) cx_frame->sz <= buf_size) {
401 buf_size = cx_frame->sz;
402 memcpy(buf, cx_frame->buf, buf_size);
403 coded_frame->pts = cx_frame->pts;
404 coded_frame->key_frame = !!(cx_frame->flags & VPX_FRAME_IS_KEY);
406 if (coded_frame->key_frame)
407 coded_frame->pict_type = AV_PICTURE_TYPE_I;
409 coded_frame->pict_type = AV_PICTURE_TYPE_P;
411 av_log(avctx, AV_LOG_ERROR,
412 "Compressed frame larger than storage provided! (%zu/%d)\n",
413 cx_frame->sz, buf_size);
414 return AVERROR(EINVAL);
420 * Queue multiple output frames from the encoder, returning the front-most.
421 * In cases where vpx_codec_get_cx_data() returns more than 1 frame append
422 * the frame queue. Return the head frame if available.
423 * @return Stored frame size
424 * @return AVERROR(EINVAL) on output size error
425 * @return AVERROR(ENOMEM) on coded frame queue data allocation error
427 static int queue_frames(AVCodecContext *avctx, uint8_t *buf, int buf_size,
428 AVFrame *coded_frame)
430 VP8Context *ctx = avctx->priv_data;
431 const struct vpx_codec_cx_pkt *pkt;
432 const void *iter = NULL;
435 if (ctx->coded_frame_list) {
436 struct FrameListData *cx_frame = ctx->coded_frame_list;
437 /* return the leading frame if we've already begun queueing */
438 size = storeframe(avctx, cx_frame, buf, buf_size, coded_frame);
440 return AVERROR(EINVAL);
441 ctx->coded_frame_list = cx_frame->next;
442 free_coded_frame(cx_frame);
445 /* consume all available output from the encoder before returning. buffers
446 are only good through the next vpx_codec call */
447 while ((pkt = vpx_codec_get_cx_data(&ctx->encoder, &iter))) {
449 case VPX_CODEC_CX_FRAME_PKT:
451 struct FrameListData cx_frame;
453 /* avoid storing the frame when the list is empty and we haven't yet
454 provided a frame for output */
455 assert(!ctx->coded_frame_list);
456 cx_pktcpy(&cx_frame, pkt);
457 size = storeframe(avctx, &cx_frame, buf, buf_size, coded_frame);
459 return AVERROR(EINVAL);
461 struct FrameListData *cx_frame =
462 av_malloc(sizeof(struct FrameListData));
465 av_log(avctx, AV_LOG_ERROR,
466 "Frame queue element alloc failed\n");
467 return AVERROR(ENOMEM);
469 cx_pktcpy(cx_frame, pkt);
470 cx_frame->buf = av_malloc(cx_frame->sz);
472 if (!cx_frame->buf) {
473 av_log(avctx, AV_LOG_ERROR,
474 "Data buffer alloc (%zu bytes) failed\n",
476 return AVERROR(ENOMEM);
478 memcpy(cx_frame->buf, pkt->data.frame.buf, pkt->data.frame.sz);
479 coded_frame_add(&ctx->coded_frame_list, cx_frame);
482 case VPX_CODEC_STATS_PKT: {
483 struct vpx_fixed_buf *stats = &ctx->twopass_stats;
484 stats->buf = av_realloc(stats->buf,
485 stats->sz + pkt->data.twopass_stats.sz);
487 av_log(avctx, AV_LOG_ERROR, "Stat buffer realloc failed\n");
488 return AVERROR(ENOMEM);
490 memcpy((uint8_t*)stats->buf + stats->sz,
491 pkt->data.twopass_stats.buf, pkt->data.twopass_stats.sz);
492 stats->sz += pkt->data.twopass_stats.sz;
495 case VPX_CODEC_PSNR_PKT: //FIXME add support for CODEC_FLAG_PSNR
496 case VPX_CODEC_CUSTOM_PKT:
497 //ignore unsupported/unrecognized packet types
505 static int vp8_encode(AVCodecContext *avctx, uint8_t *buf, int buf_size,
508 VP8Context *ctx = avctx->priv_data;
509 AVFrame *frame = data;
510 struct vpx_image *rawimg = NULL;
511 int64_t timestamp = 0;
515 rawimg = &ctx->rawimg;
516 rawimg->planes[VPX_PLANE_Y] = frame->data[0];
517 rawimg->planes[VPX_PLANE_U] = frame->data[1];
518 rawimg->planes[VPX_PLANE_V] = frame->data[2];
519 rawimg->stride[VPX_PLANE_Y] = frame->linesize[0];
520 rawimg->stride[VPX_PLANE_U] = frame->linesize[1];
521 rawimg->stride[VPX_PLANE_V] = frame->linesize[2];
522 timestamp = frame->pts;
525 res = vpx_codec_encode(&ctx->encoder, rawimg, timestamp,
526 avctx->ticks_per_frame, 0, ctx->deadline);
527 if (res != VPX_CODEC_OK) {
528 log_encoder_error(avctx, "Error encoding frame");
529 return AVERROR_INVALIDDATA;
531 coded_size = queue_frames(avctx, buf, buf_size, avctx->coded_frame);
533 if (!frame && avctx->flags & CODEC_FLAG_PASS1) {
534 unsigned int b64_size = AV_BASE64_SIZE(ctx->twopass_stats.sz);
536 avctx->stats_out = av_malloc(b64_size);
537 if (!avctx->stats_out) {
538 av_log(avctx, AV_LOG_ERROR, "Stat buffer alloc (%d bytes) failed\n",
540 return AVERROR(ENOMEM);
542 av_base64_encode(avctx->stats_out, b64_size, ctx->twopass_stats.buf,
543 ctx->twopass_stats.sz);
548 AVCodec ff_libvpx_encoder = {
550 .type = AVMEDIA_TYPE_VIDEO,
552 .priv_data_size = sizeof(VP8Context),
554 .encode = vp8_encode,
556 .capabilities = CODEC_CAP_DELAY,
557 .pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
558 .long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),