2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
14 #include "./vp8_rtcd.h"
15 #include "./vpx_dsp_rtcd.h"
16 #include "./vpx_scale_rtcd.h"
17 #include "vpx/vpx_decoder.h"
18 #include "vpx/vp8dx.h"
19 #include "vpx/internal/vpx_codec_internal.h"
20 #include "vpx_version.h"
21 #include "common/alloccommon.h"
22 #include "common/common.h"
23 #include "common/onyxd.h"
24 #include "decoder/onyxd_int.h"
25 #include "vpx_dsp/vpx_dsp_common.h"
26 #include "vpx_mem/vpx_mem.h"
27 #include "vpx_ports/system_state.h"
28 #if CONFIG_ERROR_CONCEALMENT
29 #include "decoder/error_concealment.h"
31 #include "decoder/decoderthreading.h"
33 #define VP8_CAP_POSTPROC (CONFIG_POSTPROC ? VPX_CODEC_CAP_POSTPROC : 0)
34 #define VP8_CAP_ERROR_CONCEALMENT \
35 (CONFIG_ERROR_CONCEALMENT ? VPX_CODEC_CAP_ERROR_CONCEALMENT : 0)
37 typedef vpx_codec_stream_info_t vp8_stream_info_t;
39 /* Structures for handling memory allocations */
40 typedef enum { VP8_SEG_ALG_PRIV = 256, VP8_SEG_MAX } mem_seg_id_t;
41 #define NELEMENTS(x) ((int)(sizeof(x) / sizeof((x)[0])))
43 struct vpx_codec_alg_priv {
44 vpx_codec_priv_t base;
45 vpx_codec_dec_cfg_t cfg;
48 #if CONFIG_MULTITHREAD
49 // Restart threads on next frame if set to 1.
50 // This is set when error happens in multithreaded decoding and all threads
55 vp8_postproc_cfg_t postproc_cfg;
56 vpx_decrypt_cb decrypt_cb;
60 struct frame_buffers yv12_frame_buffers;
62 FRAGMENT_DATA fragments;
65 static int vp8_init_ctx(vpx_codec_ctx_t *ctx) {
66 vpx_codec_alg_priv_t *priv =
67 (vpx_codec_alg_priv_t *)vpx_calloc(1, sizeof(*priv));
70 ctx->priv = (vpx_codec_priv_t *)priv;
71 ctx->priv->init_flags = ctx->init_flags;
73 priv->si.sz = sizeof(priv->si);
74 priv->decrypt_cb = NULL;
75 priv->decrypt_state = NULL;
77 if (ctx->config.dec) {
78 /* Update the reference to the config structure to an internal copy. */
79 priv->cfg = *ctx->config.dec;
80 ctx->config.dec = &priv->cfg;
86 static vpx_codec_err_t vp8_init(vpx_codec_ctx_t *ctx,
87 vpx_codec_priv_enc_mr_cfg_t *data) {
88 vpx_codec_err_t res = VPX_CODEC_OK;
95 /* This function only allocates space for the vpx_codec_alg_priv_t
96 * structure. More memory may be required at the time the stream
97 * information becomes known.
100 vpx_codec_alg_priv_t *priv;
102 if (vp8_init_ctx(ctx)) return VPX_CODEC_MEM_ERROR;
104 priv = (vpx_codec_alg_priv_t *)ctx->priv;
106 /* initialize number of fragments to zero */
107 priv->fragments.count = 0;
108 /* is input fragments enabled? */
109 priv->fragments.enabled =
110 (priv->base.init_flags & VPX_CODEC_USE_INPUT_FRAGMENTS);
112 /*post processing level initialized to do nothing */
118 static vpx_codec_err_t vp8_destroy(vpx_codec_alg_priv_t *ctx) {
119 vp8_remove_decoder_instances(&ctx->yv12_frame_buffers);
126 static vpx_codec_err_t vp8_peek_si_internal(const uint8_t *data,
127 unsigned int data_sz,
128 vpx_codec_stream_info_t *si,
129 vpx_decrypt_cb decrypt_cb,
130 void *decrypt_state) {
131 vpx_codec_err_t res = VPX_CODEC_OK;
133 assert(data != NULL);
135 if (data + data_sz <= data) {
136 res = VPX_CODEC_INVALID_PARAM;
138 /* Parse uncompresssed part of key frame header.
139 * 3 bytes:- including version, frame type and an offset
140 * 3 bytes:- sync code (0x9d, 0x01, 0x2a)
141 * 4 bytes:- including image width and height in the lowest 14 bits
142 * of each 2-byte value.
144 uint8_t clear_buffer[10];
145 const uint8_t *clear = data;
147 int n = VPXMIN(sizeof(clear_buffer), data_sz);
148 decrypt_cb(decrypt_state, data, clear_buffer, n);
149 clear = clear_buffer;
153 if (data_sz >= 10 && !(clear[0] & 0x01)) { /* I-Frame */
156 /* vet via sync code */
157 if (clear[3] != 0x9d || clear[4] != 0x01 || clear[5] != 0x2a) {
158 return VPX_CODEC_UNSUP_BITSTREAM;
161 si->w = (clear[6] | (clear[7] << 8)) & 0x3fff;
162 si->h = (clear[8] | (clear[9] << 8)) & 0x3fff;
164 /*printf("w=%d, h=%d\n", si->w, si->h);*/
165 if (!(si->h && si->w)) res = VPX_CODEC_CORRUPT_FRAME;
167 res = VPX_CODEC_UNSUP_BITSTREAM;
174 static vpx_codec_err_t vp8_peek_si(const uint8_t *data, unsigned int data_sz,
175 vpx_codec_stream_info_t *si) {
176 return vp8_peek_si_internal(data, data_sz, si, NULL, NULL);
179 static vpx_codec_err_t vp8_get_si(vpx_codec_alg_priv_t *ctx,
180 vpx_codec_stream_info_t *si) {
183 if (si->sz >= sizeof(vp8_stream_info_t)) {
184 sz = sizeof(vp8_stream_info_t);
186 sz = sizeof(vpx_codec_stream_info_t);
189 memcpy(si, &ctx->si, sz);
195 static vpx_codec_err_t update_error_state(
196 vpx_codec_alg_priv_t *ctx, const struct vpx_internal_error_info *error) {
199 if ((res = error->error_code)) {
200 ctx->base.err_detail = error->has_detail ? error->detail : NULL;
206 static void yuvconfig2image(vpx_image_t *img, const YV12_BUFFER_CONFIG *yv12,
208 /** vpx_img_wrap() doesn't allow specifying independent strides for
209 * the Y, U, and V planes, nor other alignment adjustments that
210 * might be representable by a YV12_BUFFER_CONFIG, so we just
211 * initialize all the fields.*/
212 img->fmt = VPX_IMG_FMT_I420;
213 img->w = yv12->y_stride;
214 img->h = (yv12->y_height + 2 * VP8BORDERINPIXELS + 15) & ~15;
215 img->d_w = img->r_w = yv12->y_width;
216 img->d_h = img->r_h = yv12->y_height;
217 img->x_chroma_shift = 1;
218 img->y_chroma_shift = 1;
219 img->planes[VPX_PLANE_Y] = yv12->y_buffer;
220 img->planes[VPX_PLANE_U] = yv12->u_buffer;
221 img->planes[VPX_PLANE_V] = yv12->v_buffer;
222 img->planes[VPX_PLANE_ALPHA] = NULL;
223 img->stride[VPX_PLANE_Y] = yv12->y_stride;
224 img->stride[VPX_PLANE_U] = yv12->uv_stride;
225 img->stride[VPX_PLANE_V] = yv12->uv_stride;
226 img->stride[VPX_PLANE_ALPHA] = yv12->y_stride;
229 img->user_priv = user_priv;
230 img->img_data = yv12->buffer_alloc;
231 img->img_data_owner = 0;
232 img->self_allocd = 0;
235 static int update_fragments(vpx_codec_alg_priv_t *ctx, const uint8_t *data,
236 unsigned int data_sz,
237 volatile vpx_codec_err_t *res) {
240 if (ctx->fragments.count == 0) {
241 /* New frame, reset fragment pointers and sizes */
242 memset((void *)ctx->fragments.ptrs, 0, sizeof(ctx->fragments.ptrs));
243 memset(ctx->fragments.sizes, 0, sizeof(ctx->fragments.sizes));
245 if (ctx->fragments.enabled && !(data == NULL && data_sz == 0)) {
246 /* Store a pointer to this fragment and return. We haven't
247 * received the complete frame yet, so we will wait with decoding.
249 ctx->fragments.ptrs[ctx->fragments.count] = data;
250 ctx->fragments.sizes[ctx->fragments.count] = data_sz;
251 ctx->fragments.count++;
252 if (ctx->fragments.count > (1 << EIGHT_PARTITION) + 1) {
253 ctx->fragments.count = 0;
254 *res = VPX_CODEC_INVALID_PARAM;
260 if (!ctx->fragments.enabled && (data == NULL && data_sz == 0)) {
264 if (!ctx->fragments.enabled) {
265 ctx->fragments.ptrs[0] = data;
266 ctx->fragments.sizes[0] = data_sz;
267 ctx->fragments.count = 1;
273 static vpx_codec_err_t vp8_decode(vpx_codec_alg_priv_t *ctx,
274 const uint8_t *data, unsigned int data_sz,
275 void *user_priv, long deadline) {
276 volatile vpx_codec_err_t res;
277 volatile unsigned int resolution_change = 0;
280 if (!ctx->fragments.enabled && (data == NULL && data_sz == 0)) {
284 /* Update the input fragment data */
285 if (update_fragments(ctx, data, data_sz, &res) <= 0) return res;
287 /* Determine the stream parameters. Note that we rely on peek_si to
288 * validate that we have a buffer that does not wrap around the top
294 res = vp8_peek_si_internal(ctx->fragments.ptrs[0], ctx->fragments.sizes[0],
295 &ctx->si, ctx->decrypt_cb, ctx->decrypt_state);
297 if ((res == VPX_CODEC_UNSUP_BITSTREAM) && !ctx->si.is_kf) {
298 /* the peek function returns an error for non keyframes, however for
299 * this case, it is not an error */
303 if (!ctx->decoder_init && !ctx->si.is_kf) res = VPX_CODEC_UNSUP_BITSTREAM;
305 if ((ctx->si.h != h) || (ctx->si.w != w)) resolution_change = 1;
307 #if CONFIG_MULTITHREAD
308 if (!res && ctx->restart_threads) {
309 struct frame_buffers *fb = &ctx->yv12_frame_buffers;
310 VP8D_COMP *pbi = ctx->yv12_frame_buffers.pbi[0];
311 VP8_COMMON *const pc = &pbi->common;
312 if (setjmp(pbi->common.error.jmp)) {
313 vp8_remove_decoder_instances(fb);
315 vpx_clear_system_state();
316 return VPX_CODEC_ERROR;
318 pbi->common.error.setjmp = 1;
319 pbi->max_threads = ctx->cfg.threads;
320 vp8_decoder_create_threads(pbi);
321 if (vpx_atomic_load_acquire(&pbi->b_multithreaded_rd)) {
322 vp8mt_alloc_temp_buffers(pbi, pc->Width, pc->mb_rows);
324 ctx->restart_threads = 0;
325 pbi->common.error.setjmp = 0;
328 /* Initialize the decoder instance on the first frame*/
329 if (!res && !ctx->decoder_init) {
332 oxcf.Width = ctx->si.w;
333 oxcf.Height = ctx->si.h;
335 oxcf.postprocess = 0;
336 oxcf.max_threads = ctx->cfg.threads;
337 oxcf.error_concealment =
338 (ctx->base.init_flags & VPX_CODEC_USE_ERROR_CONCEALMENT);
340 /* If postprocessing was enabled by the application and a
341 * configuration has not been provided, default it.
343 if (!ctx->postproc_cfg_set &&
344 (ctx->base.init_flags & VPX_CODEC_USE_POSTPROC)) {
345 ctx->postproc_cfg.post_proc_flag =
346 VP8_DEBLOCK | VP8_DEMACROBLOCK | VP8_MFQE;
347 ctx->postproc_cfg.deblocking_level = 4;
348 ctx->postproc_cfg.noise_level = 0;
351 res = vp8_create_decoder_instances(&ctx->yv12_frame_buffers, &oxcf);
352 if (res == VPX_CODEC_OK) ctx->decoder_init = 1;
355 /* Set these even if already initialized. The caller may have changed the
356 * decrypt config between frames.
358 if (ctx->decoder_init) {
359 ctx->yv12_frame_buffers.pbi[0]->decrypt_cb = ctx->decrypt_cb;
360 ctx->yv12_frame_buffers.pbi[0]->decrypt_state = ctx->decrypt_state;
364 VP8D_COMP *pbi = ctx->yv12_frame_buffers.pbi[0];
365 VP8_COMMON *const pc = &pbi->common;
366 if (resolution_change) {
367 MACROBLOCKD *const xd = &pbi->mb;
368 #if CONFIG_MULTITHREAD
371 pc->Width = ctx->si.w;
372 pc->Height = ctx->si.h;
374 int prev_mb_rows = pc->mb_rows;
376 if (setjmp(pbi->common.error.jmp)) {
377 pbi->common.error.setjmp = 0;
378 /* on failure clear the cached resolution to ensure a full
379 * reallocation is attempted on resync. */
382 vpx_clear_system_state();
383 /* same return value as used in vp8dx_receive_compressed_data */
387 pbi->common.error.setjmp = 1;
389 if (pc->Width <= 0) {
391 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
392 "Invalid frame width");
395 if (pc->Height <= 0) {
397 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
398 "Invalid frame height");
401 if (vp8_alloc_frame_buffers(pc, pc->Width, pc->Height)) {
402 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
403 "Failed to allocate frame buffers");
406 xd->pre = pc->yv12_fb[pc->lst_fb_idx];
407 xd->dst = pc->yv12_fb[pc->new_fb_idx];
409 #if CONFIG_MULTITHREAD
410 for (i = 0; i < pbi->allocated_decoding_thread_count; ++i) {
411 pbi->mb_row_di[i].mbd.dst = pc->yv12_fb[pc->new_fb_idx];
412 vp8_build_block_doffsets(&pbi->mb_row_di[i].mbd);
415 vp8_build_block_doffsets(&pbi->mb);
417 /* allocate memory for last frame MODE_INFO array */
418 #if CONFIG_ERROR_CONCEALMENT
420 if (pbi->ec_enabled) {
421 /* old prev_mip was released by vp8_de_alloc_frame_buffers()
422 * called in vp8_alloc_frame_buffers() */
423 pc->prev_mip = vpx_calloc((pc->mb_cols + 1) * (pc->mb_rows + 1),
427 vp8_de_alloc_frame_buffers(pc);
428 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
430 "last frame MODE_INFO array");
433 pc->prev_mi = pc->prev_mip + pc->mode_info_stride + 1;
435 if (vp8_alloc_overlap_lists(pbi))
436 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
437 "Failed to allocate overlap lists "
438 "for error concealment");
443 #if CONFIG_MULTITHREAD
444 if (vpx_atomic_load_acquire(&pbi->b_multithreaded_rd)) {
445 vp8mt_alloc_temp_buffers(pbi, pc->Width, prev_mb_rows);
452 pbi->common.error.setjmp = 0;
454 /* required to get past the first get_free_fb() call */
455 pbi->common.fb_idx_ref_cnt[0] = 0;
458 if (setjmp(pbi->common.error.jmp)) {
459 /* We do not know if the missing frame(s) was supposed to update
460 * any of the reference buffers, but we act conservative and
461 * mark only the last buffer as corrupted.
463 pc->yv12_fb[pc->lst_fb_idx].corrupted = 1;
465 if (pc->fb_idx_ref_cnt[pc->new_fb_idx] > 0) {
466 pc->fb_idx_ref_cnt[pc->new_fb_idx]--;
468 pc->error.setjmp = 0;
469 #if CONFIG_MULTITHREAD
470 if (pbi->restart_threads) {
473 ctx->restart_threads = 1;
476 res = update_error_state(ctx, &pbi->common.error);
480 pbi->common.error.setjmp = 1;
482 /* update the pbi fragment data */
483 pbi->fragments = ctx->fragments;
484 #if CONFIG_MULTITHREAD
485 pbi->restart_threads = 0;
487 ctx->user_priv = user_priv;
488 if (vp8dx_receive_compressed_data(pbi, data_sz, data, deadline)) {
489 res = update_error_state(ctx, &pbi->common.error);
492 /* get ready for the next series of fragments */
493 ctx->fragments.count = 0;
499 static vpx_image_t *vp8_get_frame(vpx_codec_alg_priv_t *ctx,
500 vpx_codec_iter_t *iter) {
501 vpx_image_t *img = NULL;
503 /* iter acts as a flip flop, so an image is only returned on the first
506 if (!(*iter) && ctx->yv12_frame_buffers.pbi[0]) {
507 YV12_BUFFER_CONFIG sd;
508 int64_t time_stamp = 0, time_end_stamp = 0;
512 if (ctx->base.init_flags & VPX_CODEC_USE_POSTPROC) {
513 flags.post_proc_flag = ctx->postproc_cfg.post_proc_flag;
514 flags.deblocking_level = ctx->postproc_cfg.deblocking_level;
515 flags.noise_level = ctx->postproc_cfg.noise_level;
518 if (0 == vp8dx_get_raw_frame(ctx->yv12_frame_buffers.pbi[0], &sd,
519 &time_stamp, &time_end_stamp, &flags)) {
520 yuvconfig2image(&ctx->img, &sd, ctx->user_priv);
530 static vpx_codec_err_t image2yuvconfig(const vpx_image_t *img,
531 YV12_BUFFER_CONFIG *yv12) {
532 const int y_w = img->d_w;
533 const int y_h = img->d_h;
534 const int uv_w = (img->d_w + 1) / 2;
535 const int uv_h = (img->d_h + 1) / 2;
536 vpx_codec_err_t res = VPX_CODEC_OK;
537 yv12->y_buffer = img->planes[VPX_PLANE_Y];
538 yv12->u_buffer = img->planes[VPX_PLANE_U];
539 yv12->v_buffer = img->planes[VPX_PLANE_V];
541 yv12->y_crop_width = y_w;
542 yv12->y_crop_height = y_h;
544 yv12->y_height = y_h;
545 yv12->uv_crop_width = uv_w;
546 yv12->uv_crop_height = uv_h;
547 yv12->uv_width = uv_w;
548 yv12->uv_height = uv_h;
550 yv12->y_stride = img->stride[VPX_PLANE_Y];
551 yv12->uv_stride = img->stride[VPX_PLANE_U];
553 yv12->border = (img->stride[VPX_PLANE_Y] - img->d_w) / 2;
557 static vpx_codec_err_t vp8_set_reference(vpx_codec_alg_priv_t *ctx,
559 vpx_ref_frame_t *data = va_arg(args, vpx_ref_frame_t *);
562 vpx_ref_frame_t *frame = (vpx_ref_frame_t *)data;
563 YV12_BUFFER_CONFIG sd;
565 image2yuvconfig(&frame->img, &sd);
567 return vp8dx_set_reference(ctx->yv12_frame_buffers.pbi[0],
568 frame->frame_type, &sd);
570 return VPX_CODEC_INVALID_PARAM;
574 static vpx_codec_err_t vp8_get_reference(vpx_codec_alg_priv_t *ctx,
576 vpx_ref_frame_t *data = va_arg(args, vpx_ref_frame_t *);
579 vpx_ref_frame_t *frame = (vpx_ref_frame_t *)data;
580 YV12_BUFFER_CONFIG sd;
582 image2yuvconfig(&frame->img, &sd);
584 return vp8dx_get_reference(ctx->yv12_frame_buffers.pbi[0],
585 frame->frame_type, &sd);
587 return VPX_CODEC_INVALID_PARAM;
591 static vpx_codec_err_t vp8_get_quantizer(vpx_codec_alg_priv_t *ctx,
593 int *const arg = va_arg(args, int *);
594 if (arg == NULL) return VPX_CODEC_INVALID_PARAM;
595 *arg = vp8dx_get_quantizer(ctx->yv12_frame_buffers.pbi[0]);
599 static vpx_codec_err_t vp8_set_postproc(vpx_codec_alg_priv_t *ctx,
602 vp8_postproc_cfg_t *data = va_arg(args, vp8_postproc_cfg_t *);
605 ctx->postproc_cfg_set = 1;
606 ctx->postproc_cfg = *((vp8_postproc_cfg_t *)data);
609 return VPX_CODEC_INVALID_PARAM;
615 return VPX_CODEC_INCAPABLE;
619 static vpx_codec_err_t vp8_get_last_ref_updates(vpx_codec_alg_priv_t *ctx,
621 int *update_info = va_arg(args, int *);
624 VP8D_COMP *pbi = (VP8D_COMP *)ctx->yv12_frame_buffers.pbi[0];
626 *update_info = pbi->common.refresh_alt_ref_frame * (int)VP8_ALTR_FRAME +
627 pbi->common.refresh_golden_frame * (int)VP8_GOLD_FRAME +
628 pbi->common.refresh_last_frame * (int)VP8_LAST_FRAME;
632 return VPX_CODEC_INVALID_PARAM;
636 static vpx_codec_err_t vp8_get_last_ref_frame(vpx_codec_alg_priv_t *ctx,
638 int *ref_info = va_arg(args, int *);
641 VP8D_COMP *pbi = (VP8D_COMP *)ctx->yv12_frame_buffers.pbi[0];
642 VP8_COMMON *oci = &pbi->common;
644 (vp8dx_references_buffer(oci, ALTREF_FRAME) ? VP8_ALTR_FRAME : 0) |
645 (vp8dx_references_buffer(oci, GOLDEN_FRAME) ? VP8_GOLD_FRAME : 0) |
646 (vp8dx_references_buffer(oci, LAST_FRAME) ? VP8_LAST_FRAME : 0);
650 return VPX_CODEC_INVALID_PARAM;
654 static vpx_codec_err_t vp8_get_frame_corrupted(vpx_codec_alg_priv_t *ctx,
656 int *corrupted = va_arg(args, int *);
657 VP8D_COMP *pbi = (VP8D_COMP *)ctx->yv12_frame_buffers.pbi[0];
659 if (corrupted && pbi) {
660 const YV12_BUFFER_CONFIG *const frame = pbi->common.frame_to_show;
661 if (frame == NULL) return VPX_CODEC_ERROR;
662 *corrupted = frame->corrupted;
665 return VPX_CODEC_INVALID_PARAM;
669 static vpx_codec_err_t vp8_set_decryptor(vpx_codec_alg_priv_t *ctx,
671 vpx_decrypt_init *init = va_arg(args, vpx_decrypt_init *);
674 ctx->decrypt_cb = init->decrypt_cb;
675 ctx->decrypt_state = init->decrypt_state;
677 ctx->decrypt_cb = NULL;
678 ctx->decrypt_state = NULL;
683 vpx_codec_ctrl_fn_map_t vp8_ctf_maps[] = {
684 { VP8_SET_REFERENCE, vp8_set_reference },
685 { VP8_COPY_REFERENCE, vp8_get_reference },
686 { VP8_SET_POSTPROC, vp8_set_postproc },
687 { VP8D_GET_LAST_REF_UPDATES, vp8_get_last_ref_updates },
688 { VP8D_GET_FRAME_CORRUPTED, vp8_get_frame_corrupted },
689 { VP8D_GET_LAST_REF_USED, vp8_get_last_ref_frame },
690 { VPXD_GET_LAST_QUANTIZER, vp8_get_quantizer },
691 { VPXD_SET_DECRYPTOR, vp8_set_decryptor },
695 #ifndef VERSION_STRING
696 #define VERSION_STRING
698 CODEC_INTERFACE(vpx_codec_vp8_dx) = {
699 "WebM Project VP8 Decoder" VERSION_STRING,
700 VPX_CODEC_INTERNAL_ABI_VERSION,
701 VPX_CODEC_CAP_DECODER | VP8_CAP_POSTPROC | VP8_CAP_ERROR_CONCEALMENT |
702 VPX_CODEC_CAP_INPUT_FRAGMENTS,
703 /* vpx_codec_caps_t caps; */
704 vp8_init, /* vpx_codec_init_fn_t init; */
705 vp8_destroy, /* vpx_codec_destroy_fn_t destroy; */
706 vp8_ctf_maps, /* vpx_codec_ctrl_fn_map_t *ctrl_maps; */
708 vp8_peek_si, /* vpx_codec_peek_si_fn_t peek_si; */
709 vp8_get_si, /* vpx_codec_get_si_fn_t get_si; */
710 vp8_decode, /* vpx_codec_decode_fn_t decode; */
711 vp8_get_frame, /* vpx_codec_frame_get_fn_t frame_get; */
715 /* encoder functions */
716 0, NULL, /* vpx_codec_enc_cfg_map_t */
717 NULL, /* vpx_codec_encode_fn_t */
718 NULL, /* vpx_codec_get_cx_data_fn_t */
719 NULL, /* vpx_codec_enc_config_set_fn_t */
720 NULL, /* vpx_codec_get_global_headers_fn_t */
721 NULL, /* vpx_codec_get_preview_frame_fn_t */
722 NULL /* vpx_codec_enc_mr_get_mem_loc_fn_t */