| /* |
| * IPU parser |
| * Copyright (c) 2020 Paul B Mahol |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * IPU parser |
| */ |
| |
| #include "parser.h" |
| |
| typedef struct IPUParseContext { |
| ParseContext pc; |
| } IPUParseContext; |
| |
| static int ipu_parse(AVCodecParserContext *s, AVCodecContext *avctx, |
| const uint8_t **poutbuf, int *poutbuf_size, |
| const uint8_t *buf, int buf_size) |
| { |
| IPUParseContext *ipc = s->priv_data; |
| uint32_t state = ipc->pc.state; |
| int next = END_NOT_FOUND, i = 0; |
| |
| s->pict_type = AV_PICTURE_TYPE_NONE; |
| s->duration = 1; |
| |
| *poutbuf_size = 0; |
| *poutbuf = NULL; |
| |
| if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) { |
| next = buf_size; |
| } else { |
| for (; i < buf_size; i++) { |
| state = (state << 8) | buf[i]; |
| if (state == 0x1b0) { |
| next = i + 1; |
| break; |
| } |
| } |
| |
| ipc->pc.state = state; |
| if (ff_combine_frame(&ipc->pc, next, &buf, &buf_size) < 0) { |
| *poutbuf = NULL; |
| *poutbuf_size = 0; |
| return buf_size; |
| } |
| } |
| |
| *poutbuf = buf; |
| *poutbuf_size = buf_size; |
| |
| return next; |
| } |
| |
| AVCodecParser ff_ipu_parser = { |
| .codec_ids = { AV_CODEC_ID_IPU }, |
| .priv_data_size = sizeof(IPUParseContext), |
| .parser_parse = ipu_parse, |
| .parser_close = ff_parse_close, |
| }; |