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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * RV30/40 parser |
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| 3 | * Copyright (c) 2011 Konstantin Shishkov |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | /** |
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| 23 | * @file |
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| 24 | * RV30/40 parser |
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| 25 | */ |
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| 26 | |||
| 27 | #include "parser.h" |
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| 28 | #include "libavutil/intreadwrite.h" |
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| 29 | |||
| 30 | typedef struct { |
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| 31 | ParseContext pc; |
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| 32 | int64_t key_dts; |
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| 33 | int key_pts; |
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| 34 | } RV34ParseContext; |
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| 35 | |||
| 36 | static const int rv_to_av_frame_type[4] = { |
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| 37 | AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, |
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| 38 | }; |
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| 39 | |||
| 40 | static int rv34_parse(AVCodecParserContext *s, |
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| 41 | AVCodecContext *avctx, |
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| 42 | const uint8_t **poutbuf, int *poutbuf_size, |
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| 43 | const uint8_t *buf, int buf_size) |
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| 44 | { |
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| 45 | RV34ParseContext *pc = s->priv_data; |
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| 46 | int type, pts, hdr; |
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| 47 | |||
| 48 | if (buf_size < 13 + *buf * 8) { |
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| 49 | *poutbuf = buf; |
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| 50 | *poutbuf_size = buf_size; |
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| 51 | return buf_size; |
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| 52 | } |
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| 53 | |||
| 54 | hdr = AV_RB32(buf + 9 + *buf * 8); |
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| 55 | if (avctx->codec_id == AV_CODEC_ID_RV30) { |
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| 56 | type = (hdr >> 27) & 3; |
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| 57 | pts = (hdr >> 7) & 0x1FFF; |
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| 58 | } else { |
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| 59 | type = (hdr >> 29) & 3; |
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| 60 | pts = (hdr >> 6) & 0x1FFF; |
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| 61 | } |
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| 62 | |||
| 63 | if (type != 3 && s->pts != AV_NOPTS_VALUE) { |
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| 64 | pc->key_dts = s->pts; |
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| 65 | pc->key_pts = pts; |
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| 66 | } else { |
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| 67 | if (type != 3) |
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| 68 | s->pts = pc->key_dts + ((pts - pc->key_pts) & 0x1FFF); |
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| 69 | else |
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| 70 | s->pts = pc->key_dts - ((pc->key_pts - pts) & 0x1FFF); |
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| 71 | } |
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| 72 | s->pict_type = rv_to_av_frame_type[type]; |
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| 73 | |||
| 74 | *poutbuf = buf; |
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| 75 | *poutbuf_size = buf_size; |
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| 76 | return buf_size; |
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| 77 | } |
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| 78 | |||
| 79 | #if CONFIG_RV30_PARSER |
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| 80 | AVCodecParser ff_rv30_parser = { |
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| 81 | .codec_ids = { AV_CODEC_ID_RV30 }, |
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| 82 | .priv_data_size = sizeof(RV34ParseContext), |
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| 83 | .parser_parse = rv34_parse, |
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| 84 | }; |
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| 85 | #endif |
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| 86 | |||
| 87 | #if CONFIG_RV40_PARSER |
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| 88 | AVCodecParser ff_rv40_parser = { |
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| 89 | .codec_ids = { AV_CODEC_ID_RV40 }, |
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| 90 | .priv_data_size = sizeof(RV34ParseContext), |
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| 91 | .parser_parse = rv34_parse, |
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| 92 | }; |
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| 93 | #endif |