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author | James Almer <jamrial@gmail.com> | 2018-07-27 10:59:38 -0300 |
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committer | James Almer <jamrial@gmail.com> | 2018-07-27 11:15:59 -0300 |
commit | 536bcc30e04a7c0868f226606b81d257bae47318 (patch) | |
tree | decae7b6dcfb3a764752769fc6ca338e2803be17 /libavcodec/avs2_parser.c | |
parent | 5985a1bf72332e10d251ec643e100b5592285819 (diff) | |
download | ffmpeg-536bcc30e04a7c0868f226606b81d257bae47318.tar.gz |
avcodec: add missing files missed in previous commits
Fixes compilation.
Signed-off-by: James Almer <jamrial@gmail.com>
Diffstat (limited to 'libavcodec/avs2_parser.c')
-rw-r--r-- | libavcodec/avs2_parser.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/libavcodec/avs2_parser.c b/libavcodec/avs2_parser.c new file mode 100644 index 0000000000..520e98a9b4 --- /dev/null +++ b/libavcodec/avs2_parser.c @@ -0,0 +1,95 @@ +/* + * AVS2/IEEE 1857.4 video parser. + * Copyright (c) 2018 Huiwen Ren <hwrenx@gmail.com> + * + * 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 + */ + +#include "parser.h" + +#define SLICE_MAX_START_CODE 0x000001af + +#define ISPIC(x) ((x) == 0xB3 || (x) == 0xB6) +#define ISUNIT(x) ((x) == 0xB0 || (x) == 0xB1 || (x) == 0xB2 || ISPIC(x)) + +static int avs2_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size) +{ + int pic_found = pc->frame_start_found; + uint32_t state = pc->state; + int cur = 0; + + if (!pic_found) { + for (; cur < buf_size; ++cur) { + state = (state<<8) | buf[cur]; + if (ISUNIT(buf[cur])){ + ++cur; + pic_found = 1; + break; + } + } + } + + if (pic_found) { + if (!buf_size) + return END_NOT_FOUND; + for (; cur < buf_size; ++cur) { + state = (state << 8) | buf[cur]; + if ((state & 0xFFFFFF00) == 0x100 && state > SLICE_MAX_START_CODE) { + pc->frame_start_found = 0; + pc->state = -1; + return cur - 3; + } + } + } + + pc->frame_start_found = pic_found; + pc->state = state; + + return END_NOT_FOUND; +} + +static int avs2_parse(AVCodecParserContext *s, AVCodecContext *avctx, + const uint8_t **poutbuf, int *poutbuf_size, + const uint8_t *buf, int buf_size) +{ + ParseContext *pc = s->priv_data; + int next; + + if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) { + next = buf_size; + } else { + next = avs2_find_frame_end(pc, buf, buf_size); + if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) { + *poutbuf = NULL; + *poutbuf_size = 0; + return buf_size; + } + } + + *poutbuf = buf; + *poutbuf_size = buf_size; + + return next; +} + +AVCodecParser ff_avs2_parser = { + .codec_ids = { AV_CODEC_ID_AVS2 }, + .priv_data_size = sizeof(ParseContext), + .parser_parse = avs2_parse, + .parser_close = ff_parse_close, + .split = ff_mpeg4video_split, +}; |