| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 "libavutil/intreadwrite.h" | ||
| 25 | #include "libavcodec/get_bits.h" | ||
| 26 | #include "parser.h" | ||
| 27 | |||
| 28 | 2539 | 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 | 2539 | *out_data = data; | |
| 37 | 2539 | *out_size = size; | |
| 38 | |||
| 39 |
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2539 | if (!size || (res = init_get_bits8(&gb, data, size)) < 0) |
| 40 | 252 | return size; // parsers can't return errors | |
| 41 | 2287 | get_bits(&gb, 2); // frame marker | |
| 42 | 2287 | profile = get_bits1(&gb); | |
| 43 | 2287 | profile |= get_bits1(&gb) << 1; | |
| 44 |
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2287 | if (profile == 3) profile += get_bits1(&gb); |
| 45 |
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2287 | if (profile > 3) |
| 46 | ✗ | return size; | |
| 47 | |||
| 48 | 2287 | avctx->profile = profile; | |
| 49 | |||
| 50 |
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2287 | if (get_bits1(&gb)) { |
| 51 | 31 | keyframe = 0; | |
| 52 | } else { | ||
| 53 | 2256 | keyframe = !get_bits1(&gb); | |
| 54 | } | ||
| 55 | |||
| 56 |
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2287 | if (!keyframe) { |
| 57 | 2035 | ctx->pict_type = AV_PICTURE_TYPE_P; | |
| 58 | 2035 | ctx->key_frame = 0; | |
| 59 | } else { | ||
| 60 | 252 | ctx->pict_type = AV_PICTURE_TYPE_I; | |
| 61 | 252 | ctx->key_frame = 1; | |
| 62 | } | ||
| 63 | |||
| 64 | 2287 | return size; | |
| 65 | } | ||
| 66 | |||
| 67 | const AVCodecParser ff_vp9_parser = { | ||
| 68 | .codec_ids = { AV_CODEC_ID_VP9 }, | ||
| 69 | .parser_parse = parse, | ||
| 70 | }; | ||
| 71 |