tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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video_enc_params.c (2336B)

      1 /*
      2 * This file is part of FFmpeg.
      3 *
      4 * FFmpeg is free software; you can redistribute it and/or
      5 * modify it under the terms of the GNU Lesser General Public
      6 * License as published by the Free Software Foundation; either
      7 * version 2.1 of the License, or (at your option) any later version.
      8 *
      9 * FFmpeg is distributed in the hope that it will be useful,
     10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12 * Lesser General Public License for more details.
     13 *
     14 * You should have received a copy of the GNU Lesser General Public
     15 * License along with FFmpeg; if not, write to the Free Software
     16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
     17 */
     18 
     19 #include <stddef.h>
     20 #include <stdint.h>
     21 
     22 #include "buffer.h"
     23 #include "frame.h"
     24 #include "mem.h"
     25 #include "video_enc_params.h"
     26 
     27 AVVideoEncParams *av_video_enc_params_alloc(enum AVVideoEncParamsType type,
     28                                            unsigned int nb_blocks, size_t *out_size)
     29 {
     30    struct TestStruct {
     31        AVVideoEncParams   p;
     32        AVVideoBlockParams b;
     33    };
     34    const size_t blocks_offset = offsetof(struct TestStruct, b);
     35    size_t size = blocks_offset;
     36    AVVideoEncParams *par;
     37 
     38    if (nb_blocks > (SIZE_MAX - size) / sizeof(AVVideoBlockParams))
     39        return NULL;
     40    size += sizeof(AVVideoBlockParams) * nb_blocks;
     41 
     42    par = av_mallocz(size);
     43    if (!par)
     44        return NULL;
     45 
     46    par->type          = type;
     47    par->nb_blocks     = nb_blocks;
     48    par->block_size    = sizeof(AVVideoBlockParams);
     49    par->blocks_offset = blocks_offset;
     50 
     51    if (out_size)
     52        *out_size = size;
     53 
     54    return par;
     55 }
     56 
     57 AVVideoEncParams*
     58 av_video_enc_params_create_side_data(AVFrame *frame, enum AVVideoEncParamsType type,
     59                                     unsigned int nb_blocks)
     60 {
     61    AVBufferRef      *buf;
     62    AVVideoEncParams *par;
     63    size_t size;
     64 
     65    par = av_video_enc_params_alloc(type, nb_blocks, &size);
     66    if (!par)
     67        return NULL;
     68    buf = av_buffer_create((uint8_t *)par, size, NULL, NULL, 0);
     69    if (!buf) {
     70        av_freep(&par);
     71        return NULL;
     72    }
     73 
     74    if (!av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_VIDEO_ENC_PARAMS, buf)) {
     75        av_buffer_unref(&buf);
     76        return NULL;
     77    }
     78 
     79    return par;
     80 }