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https://github.com/nyanmisaka/ffmpeg-rockchip.git
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7a72695c05
* commit '36ef5369ee9b336febc2c270f8718cec4476cb85': 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>
92 lines
2.6 KiB
C
92 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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