7a72695c05
* commit '36ef5369ee':
Replace all CODEC_ID_* with AV_CODEC_ID_*
lavc: add AV prefix to codec ids.
Conflicts:
doc/APIchanges
doc/examples/decoding_encoding.c
doc/examples/muxing.c
ffmpeg.c
ffprobe.c
ffserver.c
libavcodec/8svx.c
libavcodec/avcodec.h
libavcodec/dnxhd_parser.c
libavcodec/dvdsubdec.c
libavcodec/error_resilience.c
libavcodec/h263dec.c
libavcodec/libvorbisenc.c
libavcodec/mjpeg_parser.c
libavcodec/mjpegenc.c
libavcodec/mpeg12.c
libavcodec/mpeg4videodec.c
libavcodec/mpegvideo.c
libavcodec/mpegvideo_enc.c
libavcodec/pcm.c
libavcodec/r210dec.c
libavcodec/utils.c
libavcodec/v210dec.c
libavcodec/version.h
libavdevice/alsa-audio-dec.c
libavdevice/bktr.c
libavdevice/v4l2.c
libavformat/asfdec.c
libavformat/asfenc.c
libavformat/avformat.h
libavformat/avidec.c
libavformat/caf.c
libavformat/electronicarts.c
libavformat/flacdec.c
libavformat/flvdec.c
libavformat/flvenc.c
libavformat/framecrcenc.c
libavformat/img2.c
libavformat/img2dec.c
libavformat/img2enc.c
libavformat/ipmovie.c
libavformat/isom.c
libavformat/matroska.c
libavformat/matroskadec.c
libavformat/matroskaenc.c
libavformat/mov.c
libavformat/movenc.c
libavformat/mp3dec.c
libavformat/mpeg.c
libavformat/mpegts.c
libavformat/mxf.c
libavformat/mxfdec.c
libavformat/mxfenc.c
libavformat/nsvdec.c
libavformat/nut.c
libavformat/oggenc.c
libavformat/pmpdec.c
libavformat/rawdec.c
libavformat/rawenc.c
libavformat/riff.c
libavformat/sdp.c
libavformat/utils.c
libavformat/vocenc.c
libavformat/wtv.c
libavformat/xmv.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/*
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* BMP parser
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* Copyright (c) 2012 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* BMP parser
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*/
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#include "libavutil/bswap.h"
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#include "parser.h"
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typedef struct BMPParseContext {
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ParseContext pc;
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uint32_t fsize;
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uint32_t remaining_size;
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} BMPParseContext;
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static int bmp_parse(AVCodecParserContext *s, AVCodecContext *avctx,
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const uint8_t **poutbuf, int *poutbuf_size,
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const uint8_t *buf, int buf_size)
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{
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BMPParseContext *bpc = s->priv_data;
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uint64_t state = bpc->pc.state64;
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int next = END_NOT_FOUND;
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int i = 0;
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s->pict_type = AV_PICTURE_TYPE_NONE;
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*poutbuf_size = 0;
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if (buf_size == 0)
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return 0;
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if (!bpc->pc.frame_start_found) {
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for (; i < buf_size; i++) {
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state = (state << 8) | buf[i];
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if ((state >> 48) == (('B' << 8) | 'M')) {
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bpc->fsize = av_bswap32(state >> 16);
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bpc->pc.frame_start_found = 1;
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if (bpc->fsize > buf_size - i + 7)
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bpc->remaining_size = bpc->fsize - buf_size + i - 7;
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else
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next = bpc->fsize + i - 7;
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break;
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}
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}
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bpc->pc.state64 = state;
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} else {
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if (bpc->remaining_size) {
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i = FFMIN(bpc->remaining_size, buf_size);
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bpc->remaining_size -= i;
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if (bpc->remaining_size)
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goto flush;
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next = i;
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}
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}
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flush:
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if (ff_combine_frame(&bpc->pc, next, &buf, &buf_size) < 0)
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return buf_size;
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bpc->pc.frame_start_found = 0;
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*poutbuf = buf;
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*poutbuf_size = buf_size;
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return next;
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}
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AVCodecParser ff_bmp_parser = {
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.codec_ids = { AV_CODEC_ID_BMP },
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.priv_data_size = sizeof(BMPParseContext),
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.parser_parse = bmp_parse,
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.parser_close = ff_parse_close,
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};
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