diff options
author | Aurelien Jacobs <aurel@gnuage.org> | 2007-05-11 03:03:14 +0400 |
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committer | Aurelien Jacobs <aurel@gnuage.org> | 2007-05-11 03:03:14 +0400 |
commit | 426a189b777623af2e6d315e5054ec2b3a14babe (patch) | |
tree | 58b5dd3152322c52dc26ecf89783a5d515ab8563 /libavcodec/pnm_parser.c | |
parent | b16560a3892be5faa5efc7c8bec172985831bd53 (diff) |
move pnm parser in its own file
Originally committed as revision 8988 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/pnm_parser.c')
-rw-r--r-- | libavcodec/pnm_parser.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/libavcodec/pnm_parser.c b/libavcodec/pnm_parser.c new file mode 100644 index 0000000000..f5212f0244 --- /dev/null +++ b/libavcodec/pnm_parser.c @@ -0,0 +1,93 @@ +/* + * PNM image parser + * Copyright (c) 2002, 2003 Fabrice Bellard. + * + * 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" //for ParseContext +#include "pnm.h" + + +static int pnm_parse(AVCodecParserContext *s, + AVCodecContext *avctx, + const uint8_t **poutbuf, int *poutbuf_size, + const uint8_t *buf, int buf_size) +{ + ParseContext *pc = s->priv_data; + PNMContext pnmctx; + int next; + + for(; pc->overread>0; pc->overread--){ + pc->buffer[pc->index++]= pc->buffer[pc->overread_index++]; + } +retry: + if(pc->index){ + pnmctx.bytestream_start= + pnmctx.bytestream= pc->buffer; + pnmctx.bytestream_end= pc->buffer + pc->index; + }else{ + pnmctx.bytestream_start= + pnmctx.bytestream= (uint8_t *) buf; /* casts avoid warnings */ + pnmctx.bytestream_end= (uint8_t *) buf + buf_size; + } + if(ff_pnm_decode_header(avctx, &pnmctx) < 0){ + if(pnmctx.bytestream < pnmctx.bytestream_end){ + if(pc->index){ + pc->index=0; + }else{ + buf++; + buf_size--; + } + goto retry; + } +#if 0 + if(pc->index && pc->index*2 + FF_INPUT_BUFFER_PADDING_SIZE < pc->buffer_size && buf_size > pc->index){ + memcpy(pc->buffer + pc->index, buf, pc->index); + pc->index += pc->index; + buf += pc->index; + buf_size -= pc->index; + goto retry; + } +#endif + next= END_NOT_FOUND; + }else{ + next= pnmctx.bytestream - pnmctx.bytestream_start + + avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height); + if(pnmctx.bytestream_start!=buf) + next-= pc->index; + if(next > buf_size) + next= END_NOT_FOUND; + } + + 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 pnm_parser = { + { CODEC_ID_PGM, CODEC_ID_PGMYUV, CODEC_ID_PPM, CODEC_ID_PBM, CODEC_ID_PAM}, + sizeof(ParseContext), + NULL, + pnm_parse, + ff_parse_close, +}; |