The Tor Browser: media/libvpx/vp8/vp8_dx_iface.c@ac0c01689b40 (annotated)

media/libvpx/vp8/vp8_dx_iface.c@ac0c01689b40 (annotated)

media/libvpx/vp8/vp8_dx_iface.c

Thu, 15 Jan 2015 15:59:08 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 15 Jan 2015 15:59:08 +0100
branch: TOR_BUG_9701
changeset 10: ac0c01689b40
permissions: -rw-r--r--

Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /*
  *  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 "vp8_rtcd.h"
 #include "vpx/vpx_decoder.h"
 #include "vpx/vp8dx.h"
 #include "vpx/internal/vpx_codec_internal.h"
 #include "vpx_version.h"
 #include "common/onyxd.h"
 #include "decoder/onyxd_int.h"
 #include "common/alloccommon.h"
 #include "vpx_mem/vpx_mem.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])))
 static unsigned long vp8_priv_sz(const vpx_codec_dec_cfg_t *si, vpx_codec_flags_t);
 static const mem_req_t vp8_mem_req_segs[] =
 {
     {VP8_SEG_ALG_PRIV,    0, 8, VPX_CODEC_MEM_ZERO, vp8_priv_sz},
     {VP8_SEG_MAX, 0, 0, 0, NULL}
 };
 struct vpx_codec_alg_priv
 {
     vpx_codec_priv_t        base;
     vpx_codec_mmap_t        mmaps[NELEMENTS(vp8_mem_req_segs)-1];
     vpx_codec_dec_cfg_t     cfg;
     vp8_stream_info_t       si;
     int                     defer_alloc;
     int                     decoder_init;
     int                     postproc_cfg_set;
     vp8_postproc_cfg_t      postproc_cfg;
 #if CONFIG_POSTPROC_VISUALIZER
     unsigned int            dbg_postproc_flag;
     int                     dbg_color_ref_frame_flag;
     int                     dbg_color_mb_modes_flag;
     int                     dbg_color_b_modes_flag;
     int                     dbg_display_mv_flag;
 #endif
     vp8_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 unsigned long vp8_priv_sz(const vpx_codec_dec_cfg_t *si, vpx_codec_flags_t flags)
 {
     /* Although this declaration is constant, we can't use it in the requested
      * segments list because we want to define the requested segments list
      * before defining the private type (so that the number of memory maps is
      * known)
      */
     (void)si;
     return sizeof(vpx_codec_alg_priv_t);
 }
 static void vp8_init_ctx(vpx_codec_ctx_t *ctx, const vpx_codec_mmap_t *mmap)
 {
     int i;
     ctx->priv = mmap->base;
     ctx->priv->sz = sizeof(*ctx->priv);
     ctx->priv->iface = ctx->iface;
     ctx->priv->alg_priv = mmap->base;
     for (i = 0; i < NELEMENTS(ctx->priv->alg_priv->mmaps); i++)
         ctx->priv->alg_priv->mmaps[i].id = vp8_mem_req_segs[i].id;
     ctx->priv->alg_priv->mmaps[0] = *mmap;
     ctx->priv->alg_priv->si.sz = sizeof(ctx->priv->alg_priv->si);
     ctx->priv->alg_priv->decrypt_cb = NULL;
     ctx->priv->alg_priv->decrypt_state = NULL;
     ctx->priv->init_flags = ctx->init_flags;
     if (ctx->config.dec)
     {
         /* Update the reference to the config structure to an internal copy. */
         ctx->priv->alg_priv->cfg = *ctx->config.dec;
         ctx->config.dec = &ctx->priv->alg_priv->cfg;
     }
 }
 static void vp8_finalize_mmaps(vpx_codec_alg_priv_t *ctx)
 {
     /* nothing to clean up */
 }
 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();
     /* 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_mmap_t mmap;
         mmap.id = vp8_mem_req_segs[0].id;
         mmap.sz = sizeof(vpx_codec_alg_priv_t);
         mmap.align = vp8_mem_req_segs[0].align;
         mmap.flags = vp8_mem_req_segs[0].flags;
         res = vpx_mmap_alloc(&mmap);
         if (res != VPX_CODEC_OK) return res;
         vp8_init_ctx(ctx, &mmap);
         /* initialize number of fragments to zero */
         ctx->priv->alg_priv->fragments.count = 0;
         /* is input fragments enabled? */
         ctx->priv->alg_priv->fragments.enabled =
                 (ctx->priv->alg_priv->base.init_flags &
                     VPX_CODEC_USE_INPUT_FRAGMENTS);
         ctx->priv->alg_priv->defer_alloc = 1;
         /*post processing level initialized to do nothing */
     }
     ctx->priv->alg_priv->yv12_frame_buffers.use_frame_threads =
             (ctx->priv->alg_priv->base.init_flags &
                     VPX_CODEC_USE_FRAME_THREADING);
     /* for now, disable frame threading */
     ctx->priv->alg_priv->yv12_frame_buffers.use_frame_threads = 0;
     if(ctx->priv->alg_priv->yv12_frame_buffers.use_frame_threads &&
             (( ctx->priv->alg_priv->base.init_flags &
                             VPX_CODEC_USE_ERROR_CONCEALMENT)
                     || ( ctx->priv->alg_priv->base.init_flags &
                             VPX_CODEC_USE_INPUT_FRAGMENTS) ) )
     {
         /* row-based threading, error concealment, and input fragments will
          * not be supported when using frame-based threading */
         res = VPX_CODEC_INVALID_PARAM;
     }
     return res;
 }
 static vpx_codec_err_t vp8_destroy(vpx_codec_alg_priv_t *ctx)
 {
     int i;
     vp8_remove_decoder_instances(&ctx->yv12_frame_buffers);
     for (i = NELEMENTS(ctx->mmaps) - 1; i >= 0; i--)
     {
         if (ctx->mmaps[i].dtor)
             ctx->mmaps[i].dtor(&ctx->mmaps[i]);
     }
     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,
                                             vp8_decrypt_cb *decrypt_cb,
                                             void *decrypt_state)
 {
     vpx_codec_err_t res = VPX_CODEC_OK;
     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 = data_sz > 10 ? 10 : 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)
                 res = 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_UNSUP_BITSTREAM;
         }
         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 = yv12->y_width;
     img->d_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->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,
                  vpx_codec_err_t       *res)
 {
     *res = VPX_CODEC_OK;
     if (ctx->fragments.count == 0)
     {
         /* New frame, reset fragment pointers and sizes */
         vpx_memset((void*)ctx->fragments.ptrs, 0, sizeof(ctx->fragments.ptrs));
         vpx_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)
     {
         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)
 {
     vpx_codec_err_t res = VPX_CODEC_OK;
     unsigned int resolution_change = 0;
     unsigned int w, h;
     /* 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;
     /* Perform deferred allocations, if required */
     if (!res && ctx->defer_alloc)
     {
         int i;
         for (i = 1; !res && i < NELEMENTS(ctx->mmaps); i++)
         {
             vpx_codec_dec_cfg_t cfg;
             cfg.w = ctx->si.w;
             cfg.h = ctx->si.h;
             ctx->mmaps[i].id = vp8_mem_req_segs[i].id;
             ctx->mmaps[i].sz = vp8_mem_req_segs[i].sz;
             ctx->mmaps[i].align = vp8_mem_req_segs[i].align;
             ctx->mmaps[i].flags = vp8_mem_req_segs[i].flags;
             if (!ctx->mmaps[i].sz)
                 ctx->mmaps[i].sz = vp8_mem_req_segs[i].calc_sz(&cfg,
                                    ctx->base.init_flags);
             res = vpx_mmap_alloc(&ctx->mmaps[i]);
         }
         if (!res)
             vp8_finalize_mmaps(ctx);
         ctx->defer_alloc = 0;
     }
     /* Initialize the decoder instance on the first frame*/
     if (!res && !ctx->decoder_init)
     {
         res = vpx_validate_mmaps(&ctx->si, ctx->mmaps,
                                  vp8_mem_req_segs, NELEMENTS(vp8_mem_req_segs),
                                  ctx->base.init_flags);
         if (!res)
         {
             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);
             ctx->yv12_frame_buffers.pbi[0]->decrypt_cb = ctx->decrypt_cb;
             ctx->yv12_frame_buffers.pbi[0]->decrypt_state = ctx->decrypt_state;
         }
         ctx->decoder_init = 1;
     }
     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;
                     /* 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 (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 = {0};
         if (ctx->base.init_flags & VPX_CODEC_USE_POSTPROC)
         {
             flags.post_proc_flag= ctx->postproc_cfg.post_proc_flag
 #if CONFIG_POSTPROC_VISUALIZER
                                 | ((ctx->dbg_color_ref_frame_flag != 0) ? VP8D_DEBUG_CLR_FRM_REF_BLKS : 0)
                                 | ((ctx->dbg_color_mb_modes_flag != 0) ? VP8D_DEBUG_CLR_BLK_MODES : 0)
                                 | ((ctx->dbg_color_b_modes_flag != 0) ? VP8D_DEBUG_CLR_BLK_MODES : 0)
                                 | ((ctx->dbg_display_mv_flag != 0) ? VP8D_DEBUG_DRAW_MV : 0)
 #endif
                                 ;
             flags.deblocking_level      = ctx->postproc_cfg.deblocking_level;
             flags.noise_level           = ctx->postproc_cfg.noise_level;
 #if CONFIG_POSTPROC_VISUALIZER
             flags.display_ref_frame_flag= ctx->dbg_color_ref_frame_flag;
             flags.display_mb_modes_flag = ctx->dbg_color_mb_modes_flag;
             flags.display_b_modes_flag  = ctx->dbg_color_b_modes_flag;
             flags.display_mv_flag       = ctx->dbg_display_mv_flag;
 #endif
         }
         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 vp8_xma_get_mmap(const vpx_codec_ctx_t      *ctx,
                                  vpx_codec_mmap_t           *mmap,
                                  vpx_codec_iter_t           *iter)
 {
     vpx_codec_err_t     res;
     const mem_req_t  *seg_iter = *iter;
     /* Get address of next segment request */
     do
     {
         if (!seg_iter)
             seg_iter = vp8_mem_req_segs;
         else if (seg_iter->id != VP8_SEG_MAX)
             seg_iter++;
         *iter = (vpx_codec_iter_t)seg_iter;
         if (seg_iter->id != VP8_SEG_MAX)
         {
             mmap->id = seg_iter->id;
             mmap->sz = seg_iter->sz;
             mmap->align = seg_iter->align;
             mmap->flags = seg_iter->flags;
             if (!seg_iter->sz)
                 mmap->sz = seg_iter->calc_sz(ctx->config.dec, ctx->init_flags);
             res = VPX_CODEC_OK;
         }
         else
             res = VPX_CODEC_LIST_END;
     }
     while (!mmap->sz && res != VPX_CODEC_LIST_END);
     return res;
 }
 static vpx_codec_err_t vp8_xma_set_mmap(vpx_codec_ctx_t         *ctx,
                                         const vpx_codec_mmap_t  *mmap)
 {
     vpx_codec_err_t res = VPX_CODEC_MEM_ERROR;
     int i, done;
     if (!ctx->priv)
     {
         if (mmap->id == VP8_SEG_ALG_PRIV)
         {
             if (!ctx->priv)
             {
                 vp8_init_ctx(ctx, mmap);
                 res = VPX_CODEC_OK;
             }
         }
     }
     done = 1;
     if (!res && ctx->priv->alg_priv)
     {
         for (i = 0; i < NELEMENTS(ctx->priv->alg_priv->mmaps); i++)
         {
             if (ctx->priv->alg_priv->mmaps[i].id == mmap->id)
                 if (!ctx->priv->alg_priv->mmaps[i].base)
                 {
                     ctx->priv->alg_priv->mmaps[i] = *mmap;
                     res = VPX_CODEC_OK;
                 }
             done &= (ctx->priv->alg_priv->mmaps[i].base != NULL);
         }
     }
     if (done && !res)
     {
         vp8_finalize_mmaps(ctx->priv->alg_priv);
         res = ctx->iface->init(ctx, NULL);
     }
     return res;
 }
 static vpx_codec_err_t image2yuvconfig(const vpx_image_t   *img,
                                        YV12_BUFFER_CONFIG  *yv12)
 {
     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  = img->d_w;
     yv12->y_crop_height = img->d_h;
     yv12->y_width  = img->d_w;
     yv12->y_height = img->d_h;
     yv12->uv_width = yv12->y_width / 2;
     yv12->uv_height = yv12->y_height / 2;
     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,
         int ctr_id,
         va_list args)
 {
     vpx_ref_frame_t *data = va_arg(args, vpx_ref_frame_t *);
     if (data && !ctx->yv12_frame_buffers.use_frame_threads)
     {
         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,
         int ctr_id,
         va_list args)
 {
     vpx_ref_frame_t *data = va_arg(args, vpx_ref_frame_t *);
     if (data && !ctx->yv12_frame_buffers.use_frame_threads)
     {
         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_set_postproc(vpx_codec_alg_priv_t *ctx,
                                         int ctr_id,
                                         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
     return VPX_CODEC_INCAPABLE;
 #endif
 }
 static vpx_codec_err_t vp8_set_dbg_options(vpx_codec_alg_priv_t *ctx,
                                         int ctrl_id,
                                         va_list args)
 {
 #if CONFIG_POSTPROC_VISUALIZER && CONFIG_POSTPROC
     int data = va_arg(args, int);
 #define MAP(id, var) case id: var = data; break;
     switch (ctrl_id)
     {
         MAP (VP8_SET_DBG_COLOR_REF_FRAME,   ctx->dbg_color_ref_frame_flag);
         MAP (VP8_SET_DBG_COLOR_MB_MODES,    ctx->dbg_color_mb_modes_flag);
         MAP (VP8_SET_DBG_COLOR_B_MODES,     ctx->dbg_color_b_modes_flag);
         MAP (VP8_SET_DBG_DISPLAY_MV,        ctx->dbg_display_mv_flag);
     }
     return VPX_CODEC_OK;
 #else
     return VPX_CODEC_INCAPABLE;
 #endif
 }
 static vpx_codec_err_t vp8_get_last_ref_updates(vpx_codec_alg_priv_t *ctx,
                                                 int ctrl_id,
                                                 va_list args)
 {
     int *update_info = va_arg(args, int *);
     if (update_info && !ctx->yv12_frame_buffers.use_frame_threads)
     {
         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;
 }
 extern int vp8dx_references_buffer( VP8_COMMON *oci, int ref_frame );
 static vpx_codec_err_t vp8_get_last_ref_frame(vpx_codec_alg_priv_t *ctx,
                                               int ctrl_id,
                                               va_list args)
 {
     int *ref_info = va_arg(args, int *);
     if (ref_info && !ctx->yv12_frame_buffers.use_frame_threads)
     {
         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,
                                                int ctrl_id,
                                                va_list args)
 {
     int *corrupted = va_arg(args, int *);
     VP8D_COMP *pbi = (VP8D_COMP *)ctx->yv12_frame_buffers.pbi[0];
     if (corrupted && pbi)
     {
         *corrupted = pbi->common.frame_to_show->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,
                                          int ctrl_id,
                                          va_list args)
 {
     vp8_decrypt_init *init = va_arg(args, vp8_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},
     {VP8_SET_DBG_COLOR_REF_FRAME,   vp8_set_dbg_options},
     {VP8_SET_DBG_COLOR_MB_MODES,    vp8_set_dbg_options},
     {VP8_SET_DBG_COLOR_B_MODES,     vp8_set_dbg_options},
     {VP8_SET_DBG_DISPLAY_MV,        vp8_set_dbg_options},
     {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},
     {VP8D_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_xma_get_mmap, /* vpx_codec_get_mmap_fn_t   get_mmap; */
     vp8_xma_set_mmap, /* vpx_codec_set_mmap_fn_t   set_mmap; */
     {
         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; */
     },
     { /* encoder functions */
         NOT_IMPLEMENTED,
         NOT_IMPLEMENTED,
         NOT_IMPLEMENTED,
         NOT_IMPLEMENTED,
         NOT_IMPLEMENTED,
         NOT_IMPLEMENTED
     }
 };

The Tor Browser / annotate

media/libvpx/vp8/vp8_dx_iface.c@ac0c01689b40 (annotated)

media/libvpx/vp8/vp8_dx_iface.c