ref: 36363304903286369a63b0498d506a13fe335606
dir: /vp9/vp9_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 <stdlib.h> #include <string.h> #include "./vpx_config.h" #include "./vpx_version.h" #include "vpx/internal/vpx_codec_internal.h" #include "vpx/vp8dx.h" #include "vpx/vpx_decoder.h" #include "vpx_dsp/bitreader_buffer.h" #include "vpx_dsp/vpx_dsp_common.h" #include "vpx_util/vpx_thread.h" #include "vp9/common/vp9_alloccommon.h" #include "vp9/common/vp9_frame_buffers.h" #include "vp9/decoder/vp9_decodeframe.h" #include "vp9/vp9_dx_iface.h" #include "vp9/vp9_iface_common.h" #define VP9_CAP_POSTPROC (CONFIG_VP9_POSTPROC ? VPX_CODEC_CAP_POSTPROC : 0) static vpx_codec_err_t decoder_init(vpx_codec_ctx_t *ctx, vpx_codec_priv_enc_mr_cfg_t *data) { // 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. (void)data; if (!ctx->priv) { vpx_codec_alg_priv_t *const priv = (vpx_codec_alg_priv_t *)vpx_calloc(1, sizeof(*priv)); if (priv == NULL) return VPX_CODEC_MEM_ERROR; ctx->priv = (vpx_codec_priv_t *)priv; ctx->priv->init_flags = ctx->init_flags; priv->si.sz = sizeof(priv->si); priv->flushed = 0; if (ctx->config.dec) { priv->cfg = *ctx->config.dec; ctx->config.dec = &priv->cfg; } } return VPX_CODEC_OK; } static vpx_codec_err_t decoder_destroy(vpx_codec_alg_priv_t *ctx) { if (ctx->pbi != NULL) { vp9_decoder_remove(ctx->pbi); } if (ctx->buffer_pool) { vp9_free_ref_frame_buffers(ctx->buffer_pool); vp9_free_internal_frame_buffers(&ctx->buffer_pool->int_frame_buffers); } vpx_free(ctx->buffer_pool); vpx_free(ctx); return VPX_CODEC_OK; } static int parse_bitdepth_colorspace_sampling(BITSTREAM_PROFILE profile, struct vpx_read_bit_buffer *rb) { vpx_color_space_t color_space; if (profile >= PROFILE_2) rb->bit_offset += 1; // Bit-depth 10 or 12. color_space = (vpx_color_space_t)vpx_rb_read_literal(rb, 3); if (color_space != VPX_CS_SRGB) { rb->bit_offset += 1; // [16,235] (including xvycc) vs [0,255] range. if (profile == PROFILE_1 || profile == PROFILE_3) { rb->bit_offset += 2; // subsampling x/y. rb->bit_offset += 1; // unused. } } else { if (profile == PROFILE_1 || profile == PROFILE_3) { rb->bit_offset += 1; // unused } else { // RGB is only available in version 1. return 0; } } return 1; } static vpx_codec_err_t decoder_peek_si_internal( const uint8_t *data, unsigned int data_sz, vpx_codec_stream_info_t *si, int *is_intra_only, vpx_decrypt_cb decrypt_cb, void *decrypt_state) { int intra_only_flag = 0; uint8_t clear_buffer[10]; if (data + data_sz <= data) return VPX_CODEC_INVALID_PARAM; si->is_kf = 0; si->w = si->h = 0; if (decrypt_cb) { data_sz = VPXMIN(sizeof(clear_buffer), data_sz); decrypt_cb(decrypt_state, data, clear_buffer, data_sz); data = clear_buffer; } // A maximum of 6 bits are needed to read the frame marker, profile and // show_existing_frame. if (data_sz < 1) return VPX_CODEC_UNSUP_BITSTREAM; { int show_frame; int error_resilient; struct vpx_read_bit_buffer rb = { data, data + data_sz, 0, NULL, NULL }; const int frame_marker = vpx_rb_read_literal(&rb, 2); const BITSTREAM_PROFILE profile = vp9_read_profile(&rb); if (frame_marker != VP9_FRAME_MARKER) return VPX_CODEC_UNSUP_BITSTREAM; if (profile >= MAX_PROFILES) return VPX_CODEC_UNSUP_BITSTREAM; if (vpx_rb_read_bit(&rb)) { // show an existing frame // If profile is > 2 and show_existing_frame is true, then at least 1 more // byte (6+3=9 bits) is needed. if (profile > 2 && data_sz < 2) return VPX_CODEC_UNSUP_BITSTREAM; vpx_rb_read_literal(&rb, 3); // Frame buffer to show. return VPX_CODEC_OK; } // For the rest of the function, a maximum of 9 more bytes are needed // (computed by taking the maximum possible bits needed in each case). Note // that this has to be updated if we read any more bits in this function. if (data_sz < 10) return VPX_CODEC_UNSUP_BITSTREAM; si->is_kf = !vpx_rb_read_bit(&rb); show_frame = vpx_rb_read_bit(&rb); error_resilient = vpx_rb_read_bit(&rb); if (si->is_kf) { if (!vp9_read_sync_code(&rb)) return VPX_CODEC_UNSUP_BITSTREAM; if (!parse_bitdepth_colorspace_sampling(profile, &rb)) return VPX_CODEC_UNSUP_BITSTREAM; vp9_read_frame_size(&rb, (int *)&si->w, (int *)&si->h); } else { intra_only_flag = show_frame ? 0 : vpx_rb_read_bit(&rb); rb.bit_offset += error_resilient ? 0 : 2; // reset_frame_context if (intra_only_flag) { if (!vp9_read_sync_code(&rb)) return VPX_CODEC_UNSUP_BITSTREAM; if (profile > PROFILE_0) { if (!parse_bitdepth_colorspace_sampling(profile, &rb)) return VPX_CODEC_UNSUP_BITSTREAM; } rb.bit_offset += REF_FRAMES; // refresh_frame_flags vp9_read_frame_size(&rb, (int *)&si->w, (int *)&si->h); } } } if (is_intra_only != NULL) *is_intra_only = intra_only_flag; return VPX_CODEC_OK; } static vpx_codec_err_t decoder_peek_si(const uint8_t *data, unsigned int data_sz, vpx_codec_stream_info_t *si) { return decoder_peek_si_internal(data, data_sz, si, NULL, NULL, NULL); } static vpx_codec_err_t decoder_get_si(vpx_codec_alg_priv_t *ctx, vpx_codec_stream_info_t *si) { const size_t sz = (si->sz >= sizeof(vp9_stream_info_t)) ? sizeof(vp9_stream_info_t) : sizeof(vpx_codec_stream_info_t); memcpy(si, &ctx->si, sz); si->sz = (unsigned int)sz; return VPX_CODEC_OK; } static void set_error_detail(vpx_codec_alg_priv_t *ctx, const char *const error) { ctx->base.err_detail = error; } static vpx_codec_err_t update_error_state( vpx_codec_alg_priv_t *ctx, const struct vpx_internal_error_info *error) { if (error->error_code) set_error_detail(ctx, error->has_detail ? error->detail : NULL); return error->error_code; } static void init_buffer_callbacks(vpx_codec_alg_priv_t *ctx) { VP9_COMMON *const cm = &ctx->pbi->common; BufferPool *const pool = cm->buffer_pool; cm->new_fb_idx = INVALID_IDX; cm->byte_alignment = ctx->byte_alignment; cm->skip_loop_filter = ctx->skip_loop_filter; if (ctx->get_ext_fb_cb != NULL && ctx->release_ext_fb_cb != NULL) { pool->get_fb_cb = ctx->get_ext_fb_cb; pool->release_fb_cb = ctx->release_ext_fb_cb; pool->cb_priv = ctx->ext_priv; } else { pool->get_fb_cb = vp9_get_frame_buffer; pool->release_fb_cb = vp9_release_frame_buffer; if (vp9_alloc_internal_frame_buffers(&pool->int_frame_buffers)) vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, "Failed to initialize internal frame buffers"); pool->cb_priv = &pool->int_frame_buffers; } } static void set_default_ppflags(vp8_postproc_cfg_t *cfg) { cfg->post_proc_flag = VP8_DEBLOCK | VP8_DEMACROBLOCK; cfg->deblocking_level = 4; cfg->noise_level = 0; } static void set_ppflags(const vpx_codec_alg_priv_t *ctx, vp9_ppflags_t *flags) { 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; } static vpx_codec_err_t init_decoder(vpx_codec_alg_priv_t *ctx) { ctx->last_show_frame = -1; ctx->need_resync = 1; ctx->flushed = 0; ctx->buffer_pool = (BufferPool *)vpx_calloc(1, sizeof(BufferPool)); if (ctx->buffer_pool == NULL) return VPX_CODEC_MEM_ERROR; ctx->pbi = vp9_decoder_create(ctx->buffer_pool); if (ctx->pbi == NULL) { set_error_detail(ctx, "Failed to allocate decoder"); return VPX_CODEC_MEM_ERROR; } ctx->pbi->max_threads = ctx->cfg.threads; ctx->pbi->inv_tile_order = ctx->invert_tile_order; // 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)) set_default_ppflags(&ctx->postproc_cfg); init_buffer_callbacks(ctx); return VPX_CODEC_OK; } static INLINE void check_resync(vpx_codec_alg_priv_t *const ctx, const VP9Decoder *const pbi) { // Clear resync flag if the decoder got a key frame or intra only frame. if (ctx->need_resync == 1 && pbi->need_resync == 0 && (pbi->common.intra_only || pbi->common.frame_type == KEY_FRAME)) ctx->need_resync = 0; } static vpx_codec_err_t decode_one(vpx_codec_alg_priv_t *ctx, const uint8_t **data, unsigned int data_sz, void *user_priv, int64_t deadline) { (void)deadline; // 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. if (!ctx->si.h) { int is_intra_only = 0; const vpx_codec_err_t res = decoder_peek_si_internal(*data, data_sz, &ctx->si, &is_intra_only, ctx->decrypt_cb, ctx->decrypt_state); if (res != VPX_CODEC_OK) return res; if (!ctx->si.is_kf && !is_intra_only) return VPX_CODEC_ERROR; } ctx->user_priv = user_priv; // Set these even if already initialized. The caller may have changed the // decrypt config between frames. ctx->pbi->decrypt_cb = ctx->decrypt_cb; ctx->pbi->decrypt_state = ctx->decrypt_state; if (vp9_receive_compressed_data(ctx->pbi, data_sz, data)) { ctx->pbi->cur_buf->buf.corrupted = 1; ctx->pbi->need_resync = 1; ctx->need_resync = 1; return update_error_state(ctx, &ctx->pbi->common.error); } check_resync(ctx, ctx->pbi); return VPX_CODEC_OK; } static vpx_codec_err_t decoder_decode(vpx_codec_alg_priv_t *ctx, const uint8_t *data, unsigned int data_sz, void *user_priv, long deadline) { const uint8_t *data_start = data; const uint8_t *const data_end = data + data_sz; vpx_codec_err_t res; uint32_t frame_sizes[8]; int frame_count; if (data == NULL && data_sz == 0) { ctx->flushed = 1; return VPX_CODEC_OK; } // Reset flushed when receiving a valid frame. ctx->flushed = 0; // Initialize the decoder on the first frame. if (ctx->pbi == NULL) { const vpx_codec_err_t res = init_decoder(ctx); if (res != VPX_CODEC_OK) return res; } res = vp9_parse_superframe_index(data, data_sz, frame_sizes, &frame_count, ctx->decrypt_cb, ctx->decrypt_state); if (res != VPX_CODEC_OK) return res; if (ctx->svc_decoding && ctx->svc_spatial_layer < frame_count - 1) frame_count = ctx->svc_spatial_layer + 1; // Decode in serial mode. if (frame_count > 0) { int i; for (i = 0; i < frame_count; ++i) { const uint8_t *data_start_copy = data_start; const uint32_t frame_size = frame_sizes[i]; vpx_codec_err_t res; if (data_start < data || frame_size > (uint32_t)(data_end - data_start)) { set_error_detail(ctx, "Invalid frame size in index"); return VPX_CODEC_CORRUPT_FRAME; } res = decode_one(ctx, &data_start_copy, frame_size, user_priv, deadline); if (res != VPX_CODEC_OK) return res; data_start += frame_size; } } else { while (data_start < data_end) { const uint32_t frame_size = (uint32_t)(data_end - data_start); const vpx_codec_err_t res = decode_one(ctx, &data_start, frame_size, user_priv, deadline); if (res != VPX_CODEC_OK) return res; // Account for suboptimal termination by the encoder. while (data_start < data_end) { const uint8_t marker = read_marker(ctx->decrypt_cb, ctx->decrypt_state, data_start); if (marker) break; ++data_start; } } } return res; } static vpx_image_t *decoder_get_frame(vpx_codec_alg_priv_t *ctx, vpx_codec_iter_t *iter) { vpx_image_t *img = NULL; // Legacy parameter carried over from VP8. Has no effect for VP9 since we // always return only 1 frame per decode call. (void)iter; if (ctx->pbi != NULL) { YV12_BUFFER_CONFIG sd; vp9_ppflags_t flags = { 0, 0, 0 }; if (ctx->base.init_flags & VPX_CODEC_USE_POSTPROC) set_ppflags(ctx, &flags); if (vp9_get_raw_frame(ctx->pbi, &sd, &flags) == 0) { VP9_COMMON *const cm = &ctx->pbi->common; RefCntBuffer *const frame_bufs = cm->buffer_pool->frame_bufs; ctx->last_show_frame = ctx->pbi->common.new_fb_idx; if (ctx->need_resync) return NULL; yuvconfig2image(&ctx->img, &sd, ctx->user_priv); ctx->img.fb_priv = frame_bufs[cm->new_fb_idx].raw_frame_buffer.priv; img = &ctx->img; return img; } } return NULL; } static vpx_codec_err_t decoder_set_fb_fn( vpx_codec_alg_priv_t *ctx, vpx_get_frame_buffer_cb_fn_t cb_get, vpx_release_frame_buffer_cb_fn_t cb_release, void *cb_priv) { if (cb_get == NULL || cb_release == NULL) { return VPX_CODEC_INVALID_PARAM; } else if (ctx->pbi == NULL) { // If the decoder has already been initialized, do not accept changes to // the frame buffer functions. ctx->get_ext_fb_cb = cb_get; ctx->release_ext_fb_cb = cb_release; ctx->ext_priv = cb_priv; return VPX_CODEC_OK; } return VPX_CODEC_ERROR; } static vpx_codec_err_t ctrl_set_reference(vpx_codec_alg_priv_t *ctx, va_list args) { vpx_ref_frame_t *const data = va_arg(args, vpx_ref_frame_t *); if (data) { vpx_ref_frame_t *const frame = (vpx_ref_frame_t *)data; YV12_BUFFER_CONFIG sd; image2yuvconfig(&frame->img, &sd); return vp9_set_reference_dec( &ctx->pbi->common, ref_frame_to_vp9_reframe(frame->frame_type), &sd); } else { return VPX_CODEC_INVALID_PARAM; } } static vpx_codec_err_t ctrl_copy_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 vp9_copy_reference_dec(ctx->pbi, (VP9_REFFRAME)frame->frame_type, &sd); } else { return VPX_CODEC_INVALID_PARAM; } } static vpx_codec_err_t ctrl_get_reference(vpx_codec_alg_priv_t *ctx, va_list args) { vp9_ref_frame_t *data = va_arg(args, vp9_ref_frame_t *); if (data) { YV12_BUFFER_CONFIG *fb; fb = get_ref_frame(&ctx->pbi->common, data->idx); if (fb == NULL) return VPX_CODEC_ERROR; yuvconfig2image(&data->img, fb, NULL); return VPX_CODEC_OK; } else { return VPX_CODEC_INVALID_PARAM; } } static vpx_codec_err_t ctrl_set_postproc(vpx_codec_alg_priv_t *ctx, va_list args) { #if CONFIG_VP9_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 ctrl_get_quantizer(vpx_codec_alg_priv_t *ctx, va_list args) { int *const arg = va_arg(args, int *); if (arg == NULL || ctx->pbi == NULL) return VPX_CODEC_INVALID_PARAM; *arg = ctx->pbi->common.base_qindex; return VPX_CODEC_OK; } static vpx_codec_err_t ctrl_get_last_ref_updates(vpx_codec_alg_priv_t *ctx, va_list args) { int *const update_info = va_arg(args, int *); if (update_info) { if (ctx->pbi != NULL) { *update_info = ctx->pbi->refresh_frame_flags; return VPX_CODEC_OK; } else { return VPX_CODEC_ERROR; } } return VPX_CODEC_INVALID_PARAM; } static vpx_codec_err_t ctrl_get_frame_corrupted(vpx_codec_alg_priv_t *ctx, va_list args) { int *corrupted = va_arg(args, int *); if (corrupted) { if (ctx->pbi != NULL) { RefCntBuffer *const frame_bufs = ctx->pbi->common.buffer_pool->frame_bufs; if (ctx->pbi->common.frame_to_show == NULL) return VPX_CODEC_ERROR; if (ctx->last_show_frame >= 0) *corrupted = frame_bufs[ctx->last_show_frame].buf.corrupted; return VPX_CODEC_OK; } else { return VPX_CODEC_ERROR; } } return VPX_CODEC_INVALID_PARAM; } static vpx_codec_err_t ctrl_get_frame_size(vpx_codec_alg_priv_t *ctx, va_list args) { int *const frame_size = va_arg(args, int *); if (frame_size) { if (ctx->pbi != NULL) { const VP9_COMMON *const cm = &ctx->pbi->common; frame_size[0] = cm->width; frame_size[1] = cm->height; return VPX_CODEC_OK; } else { return VPX_CODEC_ERROR; } } return VPX_CODEC_INVALID_PARAM; } static vpx_codec_err_t ctrl_get_render_size(vpx_codec_alg_priv_t *ctx, va_list args) { int *const render_size = va_arg(args, int *); if (render_size) { if (ctx->pbi != NULL) { const VP9_COMMON *const cm = &ctx->pbi->common; render_size[0] = cm->render_width; render_size[1] = cm->render_height; return VPX_CODEC_OK; } else { return VPX_CODEC_ERROR; } } return VPX_CODEC_INVALID_PARAM; } static vpx_codec_err_t ctrl_get_bit_depth(vpx_codec_alg_priv_t *ctx, va_list args) { unsigned int *const bit_depth = va_arg(args, unsigned int *); if (bit_depth) { if (ctx->pbi != NULL) { const VP9_COMMON *const cm = &ctx->pbi->common; *bit_depth = cm->bit_depth; return VPX_CODEC_OK; } else { return VPX_CODEC_ERROR; } } return VPX_CODEC_INVALID_PARAM; } static vpx_codec_err_t ctrl_set_invert_tile_order(vpx_codec_alg_priv_t *ctx, va_list args) { ctx->invert_tile_order = va_arg(args, int); return VPX_CODEC_OK; } static vpx_codec_err_t ctrl_set_decryptor(vpx_codec_alg_priv_t *ctx, va_list args) { vpx_decrypt_init *init = va_arg(args, vpx_decrypt_init *); ctx->decrypt_cb = init ? init->decrypt_cb : NULL; ctx->decrypt_state = init ? init->decrypt_state : NULL; return VPX_CODEC_OK; } static vpx_codec_err_t ctrl_set_byte_alignment(vpx_codec_alg_priv_t *ctx, va_list args) { const int legacy_byte_alignment = 0; const int min_byte_alignment = 32; const int max_byte_alignment = 1024; const int byte_alignment = va_arg(args, int); if (byte_alignment != legacy_byte_alignment && (byte_alignment < min_byte_alignment || byte_alignment > max_byte_alignment || (byte_alignment & (byte_alignment - 1)) != 0)) return VPX_CODEC_INVALID_PARAM; ctx->byte_alignment = byte_alignment; if (ctx->pbi != NULL) { ctx->pbi->common.byte_alignment = byte_alignment; } return VPX_CODEC_OK; } static vpx_codec_err_t ctrl_set_skip_loop_filter(vpx_codec_alg_priv_t *ctx, va_list args) { ctx->skip_loop_filter = va_arg(args, int); if (ctx->pbi != NULL) { ctx->pbi->common.skip_loop_filter = ctx->skip_loop_filter; } return VPX_CODEC_OK; } static vpx_codec_err_t ctrl_set_spatial_layer_svc(vpx_codec_alg_priv_t *ctx, va_list args) { ctx->svc_decoding = 1; ctx->svc_spatial_layer = va_arg(args, int); if (ctx->svc_spatial_layer < 0) return VPX_CODEC_INVALID_PARAM; else return VPX_CODEC_OK; } static vpx_codec_ctrl_fn_map_t decoder_ctrl_maps[] = { { VP8_COPY_REFERENCE, ctrl_copy_reference }, // Setters { VP8_SET_REFERENCE, ctrl_set_reference }, { VP8_SET_POSTPROC, ctrl_set_postproc }, { VP9_INVERT_TILE_DECODE_ORDER, ctrl_set_invert_tile_order }, { VPXD_SET_DECRYPTOR, ctrl_set_decryptor }, { VP9_SET_BYTE_ALIGNMENT, ctrl_set_byte_alignment }, { VP9_SET_SKIP_LOOP_FILTER, ctrl_set_skip_loop_filter }, { VP9_DECODE_SVC_SPATIAL_LAYER, ctrl_set_spatial_layer_svc }, // Getters { VPXD_GET_LAST_QUANTIZER, ctrl_get_quantizer }, { VP8D_GET_LAST_REF_UPDATES, ctrl_get_last_ref_updates }, { VP8D_GET_FRAME_CORRUPTED, ctrl_get_frame_corrupted }, { VP9_GET_REFERENCE, ctrl_get_reference }, { VP9D_GET_DISPLAY_SIZE, ctrl_get_render_size }, { VP9D_GET_BIT_DEPTH, ctrl_get_bit_depth }, { VP9D_GET_FRAME_SIZE, ctrl_get_frame_size }, { -1, NULL }, }; #ifndef VERSION_STRING #define VERSION_STRING #endif CODEC_INTERFACE(vpx_codec_vp9_dx) = { "WebM Project VP9 Decoder" VERSION_STRING, VPX_CODEC_INTERNAL_ABI_VERSION, #if CONFIG_VP9_HIGHBITDEPTH VPX_CODEC_CAP_HIGHBITDEPTH | #endif VPX_CODEC_CAP_DECODER | VP9_CAP_POSTPROC | VPX_CODEC_CAP_EXTERNAL_FRAME_BUFFER, // vpx_codec_caps_t decoder_init, // vpx_codec_init_fn_t decoder_destroy, // vpx_codec_destroy_fn_t decoder_ctrl_maps, // vpx_codec_ctrl_fn_map_t { // NOLINT decoder_peek_si, // vpx_codec_peek_si_fn_t decoder_get_si, // vpx_codec_get_si_fn_t decoder_decode, // vpx_codec_decode_fn_t decoder_get_frame, // vpx_codec_frame_get_fn_t decoder_set_fb_fn, // vpx_codec_set_fb_fn_t }, { // NOLINT 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 } };