/*
- * H261 parser
+ * H.261 parser
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2004 Maarten Daniels
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
- * h261codec.
+ * H.261 parser
*/
#include "parser.h"
-
-static int h261_find_frame_end(ParseContext *pc, AVCodecContext* avctx, const uint8_t *buf, int buf_size){
+static int h261_find_frame_end(ParseContext *pc, AVCodecContext *avctx,
+ const uint8_t *buf, int buf_size)
+{
int vop_found, i, j;
uint32_t state;
- vop_found= pc->frame_start_found;
- state= pc->state;
+ vop_found = pc->frame_start_found;
+ state = pc->state;
- for(i=0; i<buf_size && !vop_found; i++){
- state= (state<<8) | buf[i];
- for(j=0; j<8; j++){
- if(((state>>j)&0xFFFFF0) == 0x000100){
- vop_found=1;
+ for (i = 0; i < buf_size && !vop_found; i++) {
+ state = (state << 8) | buf[i];
+ for (j = 0; j < 8; j++) {
+ if (((state >> j) & 0xFFFFF0) == 0x000100) {
+ vop_found = 1;
break;
}
}
}
- if(vop_found){
- for(; i<buf_size; i++){
- state= (state<<8) | buf[i];
- for(j=0; j<8; j++){
- if(((state>>j)&0xFFFFF0) == 0x000100){
- pc->frame_start_found=0;
- pc->state= (state>>(3*8))+0xFF00;
- return i-2;
+ if (vop_found) {
+ for (; i < buf_size; i++) {
+ state = (state << 8) | buf[i];
+ for (j = 0; j < 8; j++) {
+ if (((state >> j) & 0xFFFFF0) == 0x000100) {
+ pc->frame_start_found = 0;
+ pc->state = (state >> (3 * 8)) + 0xFF00;
+ return i - 2;
}
}
}
}
- pc->frame_start_found= vop_found;
- pc->state= state;
+ pc->frame_start_found = vop_found;
+ pc->state = state;
return END_NOT_FOUND;
}
ParseContext *pc = s->priv_data;
int next;
- next= h261_find_frame_end(pc,avctx, buf, buf_size);
+ next = h261_find_frame_end(pc, avctx, buf, buf_size);
if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
- *poutbuf = NULL;
+ *poutbuf = NULL;
*poutbuf_size = 0;
return buf_size;
}
- *poutbuf = buf;
+ *poutbuf = buf;
*poutbuf_size = buf_size;
return next;
}
-AVCodecParser h261_parser = {
- { CODEC_ID_H261 },
- sizeof(ParseContext),
- NULL,
- h261_parse,
- ff_parse_close,
+AVCodecParser ff_h261_parser = {
+ .codec_ids = { AV_CODEC_ID_H261 },
+ .priv_data_size = sizeof(ParseContext),
+ .parser_parse = h261_parse,
+ .parser_close = ff_parse_close,
};