ref: 4029b8cd40e2ab02b6936d617fbc93a53327d620
dir: /vp8/vp8_dx_iface.c/
/* * Copyright (c) 2010 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #include <assert.h> #include <stdlib.h> #include <string.h> #include "./vp8_rtcd.h" #include "./vpx_dsp_rtcd.h" #include "./vpx_scale_rtcd.h" #include "vpx/vpx_decoder.h" #include "vpx/vp8dx.h" #include "vpx/internal/vpx_codec_internal.h" #include "vpx_version.h" #include "common/alloccommon.h" #include "common/common.h" #include "common/onyxd.h" #include "decoder/onyxd_int.h" #include "vpx_dsp/vpx_dsp_common.h" #include "vpx_mem/vpx_mem.h" #include "vpx_ports/system_state.h" #if CONFIG_ERROR_CONCEALMENT #include "decoder/error_concealment.h" #endif #include "decoder/decoderthreading.h" #define VP8_CAP_POSTPROC (CONFIG_POSTPROC ? VPX_CODEC_CAP_POSTPROC : 0) #define VP8_CAP_ERROR_CONCEALMENT \ (CONFIG_ERROR_CONCEALMENT ? VPX_CODEC_CAP_ERROR_CONCEALMENT : 0) typedef vpx_codec_stream_info_t vp8_stream_info_t; /* Structures for handling memory allocations */ typedef enum { VP8_SEG_ALG_PRIV = 256, VP8_SEG_MAX } mem_seg_id_t; #define NELEMENTS(x) ((int)(sizeof(x) / sizeof((x)[0]))) struct vpx_codec_alg_priv { vpx_codec_priv_t base; vpx_codec_dec_cfg_t cfg; vp8_stream_info_t si; int decoder_init; #if CONFIG_MULTITHREAD // Restart threads on next frame if set to 1. // This is set when error happens in multithreaded decoding and all threads // are shut down. int restart_threads; #endif int postproc_cfg_set; vp8_postproc_cfg_t postproc_cfg; vpx_decrypt_cb decrypt_cb; void *decrypt_state; vpx_image_t img; int img_setup; struct frame_buffers yv12_frame_buffers; void *user_priv; FRAGMENT_DATA fragments; }; static int vp8_init_ctx(vpx_codec_ctx_t *ctx) { vpx_codec_alg_priv_t *priv = (vpx_codec_alg_priv_t *)vpx_calloc(1, sizeof(*priv)); if (!priv) return 1; ctx->priv = (vpx_codec_priv_t *)priv; ctx->priv->init_flags = ctx->init_flags; priv->si.sz = sizeof(priv->si); priv->decrypt_cb = NULL; priv->decrypt_state = NULL; if (ctx->config.dec) { /* Update the reference to the config structure to an internal copy. */ priv->cfg = *ctx->config.dec; ctx->config.dec = &priv->cfg; } return 0; } static vpx_codec_err_t vp8_init(vpx_codec_ctx_t *ctx, vpx_codec_priv_enc_mr_cfg_t *data) { vpx_codec_err_t res = VPX_CODEC_OK; (void)data; vp8_rtcd(); vpx_dsp_rtcd(); vpx_scale_rtcd(); /* This function only allocates space for the vpx_codec_alg_priv_t * structure. More memory may be required at the time the stream * information becomes known. */ if (!ctx->priv) { vpx_codec_alg_priv_t *priv; if (vp8_init_ctx(ctx)) return VPX_CODEC_MEM_ERROR; priv = (vpx_codec_alg_priv_t *)ctx->priv; /* initialize number of fragments to zero */ priv->fragments.count = 0; /* is input fragments enabled? */ priv->fragments.enabled = (priv->base.init_flags & VPX_CODEC_USE_INPUT_FRAGMENTS); /*post processing level initialized to do nothing */ } return res; } static vpx_codec_err_t vp8_destroy(vpx_codec_alg_priv_t *ctx) { vp8_remove_decoder_instances(&ctx->yv12_frame_buffers); vpx_free(ctx); return VPX_CODEC_OK; } static vpx_codec_err_t vp8_peek_si_internal(const uint8_t *data, unsigned int data_sz, vpx_codec_stream_info_t *si, vpx_decrypt_cb decrypt_cb, void *decrypt_state) { vpx_codec_err_t res = VPX_CODEC_OK; assert(data != NULL); if (data + data_sz <= data) { res = VPX_CODEC_INVALID_PARAM; } else { /* Parse uncompresssed part of key frame header. * 3 bytes:- including version, frame type and an offset * 3 bytes:- sync code (0x9d, 0x01, 0x2a) * 4 bytes:- including image width and height in the lowest 14 bits * of each 2-byte value. */ uint8_t clear_buffer[10]; const uint8_t *clear = data; if (decrypt_cb) { int n = VPXMIN(sizeof(clear_buffer), data_sz); decrypt_cb(decrypt_state, data, clear_buffer, n); clear = clear_buffer; } si->is_kf = 0; if (data_sz >= 10 && !(clear[0] & 0x01)) { /* I-Frame */ si->is_kf = 1; /* vet via sync code */ if (clear[3] != 0x9d || clear[4] != 0x01 || clear[5] != 0x2a) { return VPX_CODEC_UNSUP_BITSTREAM; } si->w = (clear[6] | (clear[7] << 8)) & 0x3fff; si->h = (clear[8] | (clear[9] << 8)) & 0x3fff; /*printf("w=%d, h=%d\n", si->w, si->h);*/ if (!(si->h && si->w)) res = VPX_CODEC_CORRUPT_FRAME; } else { res = VPX_CODEC_UNSUP_BITSTREAM; } } return res; } static vpx_codec_err_t vp8_peek_si(const uint8_t *data, unsigned int data_sz, vpx_codec_stream_info_t *si) { return vp8_peek_si_internal(data, data_sz, si, NULL, NULL); } static vpx_codec_err_t vp8_get_si(vpx_codec_alg_priv_t *ctx, vpx_codec_stream_info_t *si) { unsigned int sz; if (si->sz >= sizeof(vp8_stream_info_t)) { sz = sizeof(vp8_stream_info_t); } else { sz = sizeof(vpx_codec_stream_info_t); } memcpy(si, &ctx->si, sz); si->sz = sz; return VPX_CODEC_OK; } static vpx_codec_err_t update_error_state( vpx_codec_alg_priv_t *ctx, const struct vpx_internal_error_info *error) { vpx_codec_err_t res; if ((res = error->error_code)) { ctx->base.err_detail = error->has_detail ? error->detail : NULL; } return res; } static void yuvconfig2image(vpx_image_t *img, const YV12_BUFFER_CONFIG *yv12, void *user_priv) { /** vpx_img_wrap() doesn't allow specifying independent strides for * the Y, U, and V planes, nor other alignment adjustments that * might be representable by a YV12_BUFFER_CONFIG, so we just * initialize all the fields.*/ img->fmt = VPX_IMG_FMT_I420; img->w = yv12->y_stride; img->h = (yv12->y_height + 2 * VP8BORDERINPIXELS + 15) & ~15; img->d_w = img->r_w = yv12->y_width; img->d_h = img->r_h = yv12->y_height; img->x_chroma_shift = 1; img->y_chroma_shift = 1; img->planes[VPX_PLANE_Y] = yv12->y_buffer; img->planes[VPX_PLANE_U] = yv12->u_buffer; img->planes[VPX_PLANE_V] = yv12->v_buffer; img->planes[VPX_PLANE_ALPHA] = NULL; img->stride[VPX_PLANE_Y] = yv12->y_stride; img->stride[VPX_PLANE_U] = yv12->uv_stride; img->stride[VPX_PLANE_V] = yv12->uv_stride; img->stride[VPX_PLANE_ALPHA] = yv12->y_stride; img->bit_depth = 8; img->bps = 12; img->user_priv = user_priv; img->img_data = yv12->buffer_alloc; img->img_data_owner = 0; img->self_allocd = 0; } static int update_fragments(vpx_codec_alg_priv_t *ctx, const uint8_t *data, unsigned int data_sz, volatile vpx_codec_err_t *res) { *res = VPX_CODEC_OK; if (ctx->fragments.count == 0) { /* New frame, reset fragment pointers and sizes */ memset((void *)ctx->fragments.ptrs, 0, sizeof(ctx->fragments.ptrs)); memset(ctx->fragments.sizes, 0, sizeof(ctx->fragments.sizes)); } if (ctx->fragments.enabled && !(data == NULL && data_sz == 0)) { /* Store a pointer to this fragment and return. We haven't * received the complete frame yet, so we will wait with decoding. */ ctx->fragments.ptrs[ctx->fragments.count] = data; ctx->fragments.sizes[ctx->fragments.count] = data_sz; ctx->fragments.count++; if (ctx->fragments.count > (1 << EIGHT_PARTITION) + 1) { ctx->fragments.count = 0; *res = VPX_CODEC_INVALID_PARAM; return -1; } return 0; } if (!ctx->fragments.enabled && (data == NULL && data_sz == 0)) { return 0; } if (!ctx->fragments.enabled) { ctx->fragments.ptrs[0] = data; ctx->fragments.sizes[0] = data_sz; ctx->fragments.count = 1; } return 1; } static vpx_codec_err_t vp8_decode(vpx_codec_alg_priv_t *ctx, const uint8_t *data, unsigned int data_sz, void *user_priv, long deadline) { volatile vpx_codec_err_t res; volatile unsigned int resolution_change = 0; unsigned int w, h; if (!ctx->fragments.enabled && (data == NULL && data_sz == 0)) { return 0; } /* Update the input fragment data */ if (update_fragments(ctx, data, data_sz, &res) <= 0) return res; /* Determine the stream parameters. Note that we rely on peek_si to * validate that we have a buffer that does not wrap around the top * of the heap. */ w = ctx->si.w; h = ctx->si.h; res = vp8_peek_si_internal(ctx->fragments.ptrs[0], ctx->fragments.sizes[0], &ctx->si, ctx->decrypt_cb, ctx->decrypt_state); if ((res == VPX_CODEC_UNSUP_BITSTREAM) && !ctx->si.is_kf) { /* the peek function returns an error for non keyframes, however for * this case, it is not an error */ res = VPX_CODEC_OK; } if (!ctx->decoder_init && !ctx->si.is_kf) res = VPX_CODEC_UNSUP_BITSTREAM; if ((ctx->si.h != h) || (ctx->si.w != w)) resolution_change = 1; #if CONFIG_MULTITHREAD if (!res && ctx->restart_threads) { struct frame_buffers *fb = &ctx->yv12_frame_buffers; VP8D_COMP *pbi = ctx->yv12_frame_buffers.pbi[0]; VP8_COMMON *const pc = &pbi->common; if (setjmp(pbi->common.error.jmp)) { vp8_remove_decoder_instances(fb); vp8_zero(fb->pbi); vpx_clear_system_state(); return VPX_CODEC_ERROR; } pbi->common.error.setjmp = 1; pbi->max_threads = ctx->cfg.threads; vp8_decoder_create_threads(pbi); if (vpx_atomic_load_acquire(&pbi->b_multithreaded_rd)) { vp8mt_alloc_temp_buffers(pbi, pc->Width, pc->mb_rows); } ctx->restart_threads = 0; pbi->common.error.setjmp = 0; } #endif /* Initialize the decoder instance on the first frame*/ if (!res && !ctx->decoder_init) { VP8D_CONFIG oxcf; oxcf.Width = ctx->si.w; oxcf.Height = ctx->si.h; oxcf.Version = 9; oxcf.postprocess = 0; oxcf.max_threads = ctx->cfg.threads; oxcf.error_concealment = (ctx->base.init_flags & VPX_CODEC_USE_ERROR_CONCEALMENT); /* If postprocessing was enabled by the application and a * configuration has not been provided, default it. */ if (!ctx->postproc_cfg_set && (ctx->base.init_flags & VPX_CODEC_USE_POSTPROC)) { ctx->postproc_cfg.post_proc_flag = VP8_DEBLOCK | VP8_DEMACROBLOCK | VP8_MFQE; ctx->postproc_cfg.deblocking_level = 4; ctx->postproc_cfg.noise_level = 0; } res = vp8_create_decoder_instances(&ctx->yv12_frame_buffers, &oxcf); if (res == VPX_CODEC_OK) ctx->decoder_init = 1; } /* Set these even if already initialized. The caller may have changed the * decrypt config between frames. */ if (ctx->decoder_init) { ctx->yv12_frame_buffers.pbi[0]->decrypt_cb = ctx->decrypt_cb; ctx->yv12_frame_buffers.pbi[0]->decrypt_state = ctx->decrypt_state; } if (!res) { VP8D_COMP *pbi = ctx->yv12_frame_buffers.pbi[0]; VP8_COMMON *const pc = &pbi->common; if (resolution_change) { MACROBLOCKD *const xd = &pbi->mb; #if CONFIG_MULTITHREAD int i; #endif pc->Width = ctx->si.w; pc->Height = ctx->si.h; { int prev_mb_rows = pc->mb_rows; if (setjmp(pbi->common.error.jmp)) { pbi->common.error.setjmp = 0; /* on failure clear the cached resolution to ensure a full * reallocation is attempted on resync. */ ctx->si.w = 0; ctx->si.h = 0; vpx_clear_system_state(); /* same return value as used in vp8dx_receive_compressed_data */ return -1; } pbi->common.error.setjmp = 1; if (pc->Width <= 0) { pc->Width = w; vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, "Invalid frame width"); } if (pc->Height <= 0) { pc->Height = h; vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, "Invalid frame height"); } if (vp8_alloc_frame_buffers(pc, pc->Width, pc->Height)) { vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, "Failed to allocate frame buffers"); } xd->pre = pc->yv12_fb[pc->lst_fb_idx]; xd->dst = pc->yv12_fb[pc->new_fb_idx]; #if CONFIG_MULTITHREAD for (i = 0; i < pbi->allocated_decoding_thread_count; ++i) { pbi->mb_row_di[i].mbd.dst = pc->yv12_fb[pc->new_fb_idx]; vp8_build_block_doffsets(&pbi->mb_row_di[i].mbd); } #endif vp8_build_block_doffsets(&pbi->mb); /* allocate memory for last frame MODE_INFO array */ #if CONFIG_ERROR_CONCEALMENT if (pbi->ec_enabled) { /* old prev_mip was released by vp8_de_alloc_frame_buffers() * called in vp8_alloc_frame_buffers() */ pc->prev_mip = vpx_calloc((pc->mb_cols + 1) * (pc->mb_rows + 1), sizeof(MODE_INFO)); if (!pc->prev_mip) { vp8_de_alloc_frame_buffers(pc); vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, "Failed to allocate" "last frame MODE_INFO array"); } pc->prev_mi = pc->prev_mip + pc->mode_info_stride + 1; if (vp8_alloc_overlap_lists(pbi)) vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, "Failed to allocate overlap lists " "for error concealment"); } #endif #if CONFIG_MULTITHREAD if (vpx_atomic_load_acquire(&pbi->b_multithreaded_rd)) { vp8mt_alloc_temp_buffers(pbi, pc->Width, prev_mb_rows); } #else (void)prev_mb_rows; #endif } pbi->common.error.setjmp = 0; /* required to get past the first get_free_fb() call */ pbi->common.fb_idx_ref_cnt[0] = 0; } if (setjmp(pbi->common.error.jmp)) { /* We do not know if the missing frame(s) was supposed to update * any of the reference buffers, but we act conservative and * mark only the last buffer as corrupted. */ pc->yv12_fb[pc->lst_fb_idx].corrupted = 1; if (pc->fb_idx_ref_cnt[pc->new_fb_idx] > 0) { pc->fb_idx_ref_cnt[pc->new_fb_idx]--; } pc->error.setjmp = 0; #if CONFIG_MULTITHREAD if (pbi->restart_threads) { ctx->si.w = 0; ctx->si.h = 0; ctx->restart_threads = 1; } #endif res = update_error_state(ctx, &pbi->common.error); return res; } pbi->common.error.setjmp = 1; /* update the pbi fragment data */ pbi->fragments = ctx->fragments; #if CONFIG_MULTITHREAD pbi->restart_threads = 0; #endif ctx->user_priv = user_priv; if (vp8dx_receive_compressed_data(pbi, data_sz, data, deadline)) { res = update_error_state(ctx, &pbi->common.error); } /* get ready for the next series of fragments */ ctx->fragments.count = 0; } return res; } static vpx_image_t *vp8_get_frame(vpx_codec_alg_priv_t *ctx, vpx_codec_iter_t *iter) { vpx_image_t *img = NULL; /* iter acts as a flip flop, so an image is only returned on the first * call to get_frame. */ if (!(*iter) && ctx->yv12_frame_buffers.pbi[0]) { YV12_BUFFER_CONFIG sd; int64_t time_stamp = 0, time_end_stamp = 0; vp8_ppflags_t flags; vp8_zero(flags); if (ctx->base.init_flags & VPX_CODEC_USE_POSTPROC) { flags.post_proc_flag = ctx->postproc_cfg.post_proc_flag; flags.deblocking_level = ctx->postproc_cfg.deblocking_level; flags.noise_level = ctx->postproc_cfg.noise_level; } if (0 == vp8dx_get_raw_frame(ctx->yv12_frame_buffers.pbi[0], &sd, &time_stamp, &time_end_stamp, &flags)) { yuvconfig2image(&ctx->img, &sd, ctx->user_priv); img = &ctx->img; *iter = img; } } return img; } static vpx_codec_err_t image2yuvconfig(const vpx_image_t *img, YV12_BUFFER_CONFIG *yv12) { const int y_w = img->d_w; const int y_h = img->d_h; const int uv_w = (img->d_w + 1) / 2; const int uv_h = (img->d_h + 1) / 2; vpx_codec_err_t res = VPX_CODEC_OK; yv12->y_buffer = img->planes[VPX_PLANE_Y]; yv12->u_buffer = img->planes[VPX_PLANE_U]; yv12->v_buffer = img->planes[VPX_PLANE_V]; yv12->y_crop_width = y_w; yv12->y_crop_height = y_h; yv12->y_width = y_w; yv12->y_height = y_h; yv12->uv_crop_width = uv_w; yv12->uv_crop_height = uv_h; yv12->uv_width = uv_w; yv12->uv_height = uv_h; yv12->y_stride = img->stride[VPX_PLANE_Y]; yv12->uv_stride = img->stride[VPX_PLANE_U]; yv12->border = (img->stride[VPX_PLANE_Y] - img->d_w) / 2; return res; } static vpx_codec_err_t vp8_set_reference(vpx_codec_alg_priv_t *ctx, va_list args) { vpx_ref_frame_t *data = va_arg(args, vpx_ref_frame_t *); if (data) { vpx_ref_frame_t *frame = (vpx_ref_frame_t *)data; YV12_BUFFER_CONFIG sd; image2yuvconfig(&frame->img, &sd); return vp8dx_set_reference(ctx->yv12_frame_buffers.pbi[0], frame->frame_type, &sd); } else { return VPX_CODEC_INVALID_PARAM; } } static vpx_codec_err_t vp8_get_reference(vpx_codec_alg_priv_t *ctx, va_list args) { vpx_ref_frame_t *data = va_arg(args, vpx_ref_frame_t *); if (data) { vpx_ref_frame_t *frame = (vpx_ref_frame_t *)data; YV12_BUFFER_CONFIG sd; image2yuvconfig(&frame->img, &sd); return vp8dx_get_reference(ctx->yv12_frame_buffers.pbi[0], frame->frame_type, &sd); } else { return VPX_CODEC_INVALID_PARAM; } } static vpx_codec_err_t vp8_get_quantizer(vpx_codec_alg_priv_t *ctx, va_list args) { int *const arg = va_arg(args, int *); if (arg == NULL) return VPX_CODEC_INVALID_PARAM; *arg = vp8dx_get_quantizer(ctx->yv12_frame_buffers.pbi[0]); return VPX_CODEC_OK; } static vpx_codec_err_t vp8_set_postproc(vpx_codec_alg_priv_t *ctx, va_list args) { #if CONFIG_POSTPROC vp8_postproc_cfg_t *data = va_arg(args, vp8_postproc_cfg_t *); if (data) { ctx->postproc_cfg_set = 1; ctx->postproc_cfg = *((vp8_postproc_cfg_t *)data); return VPX_CODEC_OK; } else { return VPX_CODEC_INVALID_PARAM; } #else (void)ctx; (void)args; return VPX_CODEC_INCAPABLE; #endif } static vpx_codec_err_t vp8_get_last_ref_updates(vpx_codec_alg_priv_t *ctx, va_list args) { int *update_info = va_arg(args, int *); if (update_info) { VP8D_COMP *pbi = (VP8D_COMP *)ctx->yv12_frame_buffers.pbi[0]; *update_info = pbi->common.refresh_alt_ref_frame * (int)VP8_ALTR_FRAME + pbi->common.refresh_golden_frame * (int)VP8_GOLD_FRAME + pbi->common.refresh_last_frame * (int)VP8_LAST_FRAME; return VPX_CODEC_OK; } else { return VPX_CODEC_INVALID_PARAM; } } static vpx_codec_err_t vp8_get_last_ref_frame(vpx_codec_alg_priv_t *ctx, va_list args) { int *ref_info = va_arg(args, int *); if (ref_info) { VP8D_COMP *pbi = (VP8D_COMP *)ctx->yv12_frame_buffers.pbi[0]; VP8_COMMON *oci = &pbi->common; *ref_info = (vp8dx_references_buffer(oci, ALTREF_FRAME) ? VP8_ALTR_FRAME : 0) | (vp8dx_references_buffer(oci, GOLDEN_FRAME) ? VP8_GOLD_FRAME : 0) | (vp8dx_references_buffer(oci, LAST_FRAME) ? VP8_LAST_FRAME : 0); return VPX_CODEC_OK; } else { return VPX_CODEC_INVALID_PARAM; } } static vpx_codec_err_t vp8_get_frame_corrupted(vpx_codec_alg_priv_t *ctx, va_list args) { int *corrupted = va_arg(args, int *); VP8D_COMP *pbi = (VP8D_COMP *)ctx->yv12_frame_buffers.pbi[0]; if (corrupted && pbi) { const YV12_BUFFER_CONFIG *const frame = pbi->common.frame_to_show; if (frame == NULL) return VPX_CODEC_ERROR; *corrupted = frame->corrupted; return VPX_CODEC_OK; } else { return VPX_CODEC_INVALID_PARAM; } } static vpx_codec_err_t vp8_set_decryptor(vpx_codec_alg_priv_t *ctx, va_list args) { vpx_decrypt_init *init = va_arg(args, vpx_decrypt_init *); if (init) { ctx->decrypt_cb = init->decrypt_cb; ctx->decrypt_state = init->decrypt_state; } else { ctx->decrypt_cb = NULL; ctx->decrypt_state = NULL; } return VPX_CODEC_OK; } vpx_codec_ctrl_fn_map_t vp8_ctf_maps[] = { { VP8_SET_REFERENCE, vp8_set_reference }, { VP8_COPY_REFERENCE, vp8_get_reference }, { VP8_SET_POSTPROC, vp8_set_postproc }, { VP8D_GET_LAST_REF_UPDATES, vp8_get_last_ref_updates }, { VP8D_GET_FRAME_CORRUPTED, vp8_get_frame_corrupted }, { VP8D_GET_LAST_REF_USED, vp8_get_last_ref_frame }, { VPXD_GET_LAST_QUANTIZER, vp8_get_quantizer }, { VPXD_SET_DECRYPTOR, vp8_set_decryptor }, { -1, NULL }, }; #ifndef VERSION_STRING #define VERSION_STRING #endif CODEC_INTERFACE(vpx_codec_vp8_dx) = { "WebM Project VP8 Decoder" VERSION_STRING, VPX_CODEC_INTERNAL_ABI_VERSION, VPX_CODEC_CAP_DECODER | VP8_CAP_POSTPROC | VP8_CAP_ERROR_CONCEALMENT | VPX_CODEC_CAP_INPUT_FRAGMENTS, /* vpx_codec_caps_t caps; */ vp8_init, /* vpx_codec_init_fn_t init; */ vp8_destroy, /* vpx_codec_destroy_fn_t destroy; */ vp8_ctf_maps, /* vpx_codec_ctrl_fn_map_t *ctrl_maps; */ { vp8_peek_si, /* vpx_codec_peek_si_fn_t peek_si; */ vp8_get_si, /* vpx_codec_get_si_fn_t get_si; */ vp8_decode, /* vpx_codec_decode_fn_t decode; */ vp8_get_frame, /* vpx_codec_frame_get_fn_t frame_get; */ NULL, }, { /* encoder functions */ 0, NULL, /* vpx_codec_enc_cfg_map_t */ NULL, /* vpx_codec_encode_fn_t */ NULL, /* vpx_codec_get_cx_data_fn_t */ NULL, /* vpx_codec_enc_config_set_fn_t */ NULL, /* vpx_codec_get_global_headers_fn_t */ NULL, /* vpx_codec_get_preview_frame_fn_t */ NULL /* vpx_codec_enc_mr_get_mem_loc_fn_t */ } };