| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 "avcodec.h" | ||
| 20 | #include "ffv1.h" | ||
| 21 | #include "rangecoder.h" | ||
| 22 | |||
| 23 | #include "libavutil/attributes.h" | ||
| 24 | |||
| 25 | typedef struct FFV1ParseContext { | ||
| 26 | FFV1Context f; | ||
| 27 | int got_first; | ||
| 28 | } FFV1ParseContext; | ||
| 29 | |||
| 30 | 2099 | static int parse(AVCodecParserContext *s, | |
| 31 | AVCodecContext *avctx, | ||
| 32 | const uint8_t **poutbuf, int *poutbuf_size, | ||
| 33 | const uint8_t *buf, int buf_size) | ||
| 34 | { | ||
| 35 | 2099 | FFV1ParseContext *p = s->priv_data; | |
| 36 | 2099 | FFV1Context *f = &p->f; | |
| 37 | RangeCoder c; | ||
| 38 | 2099 | uint8_t keystate = 128; | |
| 39 | |||
| 40 | 2099 | *poutbuf = buf; | |
| 41 | 2099 | *poutbuf_size = buf_size; | |
| 42 | |||
| 43 |
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2099 | if (!p->got_first) { |
| 44 | 66 | int ret = ff_ffv1_common_init(avctx, f); | |
| 45 | 66 | p->got_first = 1; | |
| 46 |
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66 | if (ret < 0) |
| 47 | ✗ | return buf_size; | |
| 48 | |||
| 49 |
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66 | if (avctx->extradata_size > 0 && (ret = ff_ffv1_read_extra_header(f)) < 0) |
| 50 | ✗ | return buf_size; | |
| 51 | } | ||
| 52 | |||
| 53 | 2099 | ff_init_range_decoder(&c, buf, buf_size); | |
| 54 | 2099 | ff_build_rac_states(&c, 0.05 * (1LL << 32), 256 - 8); | |
| 55 | |||
| 56 | 2099 | f->avctx = avctx; | |
| 57 | 2099 | s->key_frame = get_rac(&c, &keystate); | |
| 58 | 2099 | s->pict_type = AV_PICTURE_TYPE_I; | |
| 59 | 2099 | s->field_order = AV_FIELD_UNKNOWN; | |
| 60 | 2099 | s->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN; | |
| 61 | |||
| 62 |
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2099 | if (s->key_frame) { |
| 63 | uint8_t state[CONTEXT_SIZE]; | ||
| 64 | 225 | memset(state, 128, sizeof(state)); | |
| 65 | 225 | ff_ffv1_parse_header(f, &c, state); | |
| 66 | } | ||
| 67 | |||
| 68 | 2099 | s->width = f->width; | |
| 69 | 2099 | s->height = f->height; | |
| 70 | 2099 | s->format = f->pix_fmt; | |
| 71 | |||
| 72 | 2099 | return buf_size; | |
| 73 | } | ||
| 74 | |||
| 75 | 67 | static av_cold void ffv1_close(AVCodecParserContext *s) | |
| 76 | { | ||
| 77 | 67 | FFV1ParseContext *p = s->priv_data; | |
| 78 | |||
| 79 | 67 | p->f.avctx = NULL; | |
| 80 | 67 | ff_ffv1_close(&p->f); | |
| 81 | 67 | } | |
| 82 | |||
| 83 | const AVCodecParser ff_ffv1_parser = { | ||
| 84 | .codec_ids = { AV_CODEC_ID_FFV1 }, | ||
| 85 | .priv_data_size = sizeof(FFV1ParseContext), | ||
| 86 | .parser_parse = parse, | ||
| 87 | .parser_close = ffv1_close, | ||
| 88 | }; | ||
| 89 |