blob: 609f5077d1a1b2add1dd3e13f0508615428dafa0
| 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 "libavutil/intreadwrite.h" |
| 20 | |
| 21 | #include "avcodec.h" |
| 22 | |
| 23 | static int parse(AVCodecParserContext *s, |
| 24 | AVCodecContext *avctx, |
| 25 | const uint8_t **poutbuf, int *poutbuf_size, |
| 26 | const uint8_t *buf, int buf_size) |
| 27 | { |
| 28 | unsigned int frame_type; |
| 29 | unsigned int profile; |
| 30 | |
| 31 | if (buf_size < 3) |
| 32 | return buf_size; |
| 33 | |
| 34 | frame_type = buf[0] & 1; |
| 35 | profile = (buf[0] >> 1) & 7; |
| 36 | if (profile > 3) { |
| 37 | av_log(avctx, AV_LOG_ERROR, "Invalid profile %u.\n", profile); |
| 38 | return buf_size; |
| 39 | } |
| 40 | |
| 41 | avctx->profile = profile; |
| 42 | s->key_frame = frame_type == 0; |
| 43 | s->pict_type = frame_type ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I; |
| 44 | s->format = AV_PIX_FMT_YUV420P; |
| 45 | s->field_order = AV_FIELD_PROGRESSIVE; |
| 46 | s->picture_structure = AV_PICTURE_STRUCTURE_FRAME; |
| 47 | |
| 48 | if (frame_type == 0) { |
| 49 | unsigned int sync_code; |
| 50 | unsigned int width, height; |
| 51 | |
| 52 | if (buf_size < 10) |
| 53 | return buf_size; |
| 54 | |
| 55 | sync_code = AV_RL24(buf + 3); |
| 56 | if (sync_code != 0x2a019d) { |
| 57 | av_log(avctx, AV_LOG_ERROR, "Invalid sync code %06x.\n", sync_code); |
| 58 | return buf_size; |
| 59 | } |
| 60 | |
| 61 | width = AV_RL16(buf + 6) & 0x3fff; |
| 62 | height = AV_RL16(buf + 8) & 0x3fff; |
| 63 | |
| 64 | s->width = width; |
| 65 | s->height = height; |
| 66 | s->coded_width = FFALIGN(width, 16); |
| 67 | s->coded_height = FFALIGN(height, 16); |
| 68 | } |
| 69 | |
| 70 | *poutbuf = buf; |
| 71 | *poutbuf_size = buf_size; |
| 72 | return buf_size; |
| 73 | } |
| 74 | |
| 75 | AVCodecParser ff_vp8_parser = { |
| 76 | .codec_ids = { AV_CODEC_ID_VP8 }, |
| 77 | .parser_parse = parse, |
| 78 | }; |
| 79 |