| File: | root/firefox-clang/media/ffvpx/libavcodec/vp9_parser.c |
| Warning: | line 39, column 19 Although the value stored to 'res' is used in the enclosing expression, the value is never actually read from 'res' |
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| 1 | /* |
| 2 | * VP9 compatible video decoder |
| 3 | * |
| 4 | * Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com> |
| 5 | * Copyright (C) 2013 Clément Bœsch <u pkh me> |
| 6 | * |
| 7 | * This file is part of FFmpeg. |
| 8 | * |
| 9 | * FFmpeg is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU Lesser General Public |
| 11 | * License as published by the Free Software Foundation; either |
| 12 | * version 2.1 of the License, or (at your option) any later version. |
| 13 | * |
| 14 | * FFmpeg is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * Lesser General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public |
| 20 | * License along with FFmpeg; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 22 | */ |
| 23 | |
| 24 | #include "avcodec.h" |
| 25 | #include "get_bits.h" |
| 26 | #include "parser_internal.h" |
| 27 | |
| 28 | static int parse(AVCodecParserContext *ctx, |
| 29 | AVCodecContext *avctx, |
| 30 | const uint8_t **out_data, int *out_size, |
| 31 | const uint8_t *data, int size) |
| 32 | { |
| 33 | GetBitContext gb; |
| 34 | int res, profile, keyframe; |
| 35 | |
| 36 | *out_data = data; |
| 37 | *out_size = size; |
| 38 | |
| 39 | if (!size || (res = init_get_bits8(&gb, data, size)) < 0) |
Although the value stored to 'res' is used in the enclosing expression, the value is never actually read from 'res' | |
| 40 | return size; // parsers can't return errors |
| 41 | get_bits(&gb, 2); // frame marker |
| 42 | profile = get_bits1(&gb); |
| 43 | profile |= get_bits1(&gb) << 1; |
| 44 | if (profile == 3) profile += get_bits1(&gb); |
| 45 | if (profile > 3) |
| 46 | return size; |
| 47 | |
| 48 | avctx->profile = profile; |
| 49 | |
| 50 | if (get_bits1(&gb)) { |
| 51 | keyframe = 0; |
| 52 | } else { |
| 53 | keyframe = !get_bits1(&gb); |
| 54 | } |
| 55 | |
| 56 | if (!keyframe) { |
| 57 | ctx->pict_type = AV_PICTURE_TYPE_P; |
| 58 | ctx->key_frame = 0; |
| 59 | } else { |
| 60 | ctx->pict_type = AV_PICTURE_TYPE_I; |
| 61 | ctx->key_frame = 1; |
| 62 | } |
| 63 | |
| 64 | return size; |
| 65 | } |
| 66 | |
| 67 | const FFCodecParser ff_vp9_parser = { |
| 68 | PARSER_CODEC_LIST(AV_CODEC_ID_VP9).codec_ids = { AV_CODEC_ID_VP9,AV_CODEC_ID_NONE,AV_CODEC_ID_NONE ,AV_CODEC_ID_NONE,AV_CODEC_ID_NONE,AV_CODEC_ID_NONE,AV_CODEC_ID_NONE }, |
| 69 | .parse = parse, |
| 70 | }; |