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vpx/vp8/vp8_dx_iface.c
Peter Boström d42e876164 Add atomics to vp8 synchronization primitives. 
Fixes issue on iPad Pro 10.5 (and probably other places) where threads
are not properly synchronized. On x86 this data race was benign as load
and store instructions are atomic, they were being atomic in practice as
the program hasn't been observed to be miscompiled.

Such guarantees are not made outside x86, and real problems manifested
where libvpx reliably reproduced a broken bitstream for even just the
initial keyframe. This was detected in WebRTC where this device started
using multithreading (as its CPU count is higher than earlier devices,
where the problem did not manifest as single-threading was used in
practice).

This issue was not detected under thread-sanitizer bots as mutexes were
conditionally used under this platform to simulate the protected read
and write semantics that were in practice provided on x86 platforms.

This change also removes several mutexes, so encoder/decoder state is
lighter-weight after this change and we do not need to initialize so
many mutexes (this was done even on non-thread-sanitizer platforms where
they were unused).

Change-Id: If41fcb0d99944f7bbc8ec40877cdc34d672ae72a
2017-08-31 17:55:57 -07:00

673 lines
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/*
* 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;
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;
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;
/* 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];
if (resolution_change) {
VP8_COMMON *const pc = &pbi->common;
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;
}
/* update the pbi fragment data */
pbi->fragments = ctx->fragments;
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 */
}
};
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