diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/h264_parser.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/h264_parser.c | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/contrib/ffmpeg/libavcodec/h264_parser.c b/contrib/ffmpeg/libavcodec/h264_parser.c deleted file mode 100644 index 7a85d770c..000000000 --- a/contrib/ffmpeg/libavcodec/h264_parser.c +++ /dev/null @@ -1,148 +0,0 @@ -/* - * H.26L/H.264/AVC/JVT/14496-10/... parser - * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> - * - * 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 h264_parser.c - * H.264 / AVC / MPEG4 part10 parser. - * @author Michael Niedermayer <michaelni@gmx.at> - */ - -#include "parser.h" -#include "h264_parser.h" - -#include <assert.h> - - -int ff_h264_find_frame_end(H264Context *h, const uint8_t *buf, int buf_size) -{ - int i; - uint32_t state; - ParseContext *pc = &(h->s.parse_context); -//printf("first %02X%02X%02X%02X\n", buf[0], buf[1],buf[2],buf[3]); -// mb_addr= pc->mb_addr - 1; - state= pc->state; - if(state>13) - state= 7; - - for(i=0; i<buf_size; i++){ - if(state==7){ - for(; i<buf_size; i++){ - if(!buf[i]){ - state=2; - break; - } - } - }else if(state<=2){ - if(buf[i]==1) state^= 5; //2->7, 1->4, 0->5 - else if(buf[i]) state = 7; - else state>>=1; //2->1, 1->0, 0->0 - }else if(state<=5){ - int v= buf[i] & 0x1F; - if(v==7 || v==8 || v==9){ - if(pc->frame_start_found){ - i++; -found: - pc->state=7; - pc->frame_start_found= 0; - return i-(state&5); - } - }else if(v==1 || v==2 || v==5){ - if(pc->frame_start_found){ - state+=8; - continue; - }else - pc->frame_start_found = 1; - } - state= 7; - }else{ - if(buf[i] & 0x80) - goto found; - state= 7; - } - } - pc->state= state; - return END_NOT_FOUND; -} - -static int h264_parse(AVCodecParserContext *s, - AVCodecContext *avctx, - const uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *buf, int buf_size) -{ - H264Context *h = s->priv_data; - ParseContext *pc = &h->s.parse_context; - int next; - - if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){ - next= buf_size; - }else{ - next= ff_h264_find_frame_end(h, buf, buf_size); - - if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) { - *poutbuf = NULL; - *poutbuf_size = 0; - return buf_size; - } - - if(next<0 && next != END_NOT_FOUND){ - assert(pc->last_index + next >= 0 ); - ff_h264_find_frame_end(h, &pc->buffer[pc->last_index + next], -next); //update state - } - } - - *poutbuf = buf; - *poutbuf_size = buf_size; - return next; -} - -static int h264_split(AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - int i; - uint32_t state = -1; - int has_sps= 0; - - for(i=0; i<=buf_size; i++){ - if((state&0xFFFFFF1F) == 0x107) - has_sps=1; -/* if((state&0xFFFFFF1F) == 0x101 || (state&0xFFFFFF1F) == 0x102 || (state&0xFFFFFF1F) == 0x105){ - }*/ - if((state&0xFFFFFF00) == 0x100 && (state&0xFFFFFF1F) != 0x107 && (state&0xFFFFFF1F) != 0x108 && (state&0xFFFFFF1F) != 0x109){ - if(has_sps){ - while(i>4 && buf[i-5]==0) i--; - return i-4; - } - } - if (i<buf_size) - state= (state<<8) | buf[i]; - } - return 0; -} - - -AVCodecParser h264_parser = { - { CODEC_ID_H264 }, - sizeof(H264Context), - NULL, - h264_parse, - ff_parse_close, - h264_split, -}; |