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78 lines
2.7 KiB
78 lines
2.7 KiB
/* |
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* AVCodecParser prototypes and definitions |
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* Copyright (c) 2003 Fabrice Bellard. |
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* Copyright (c) 2003 Michael Niedermayer. |
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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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#ifndef FFMPEG_PARSER_H |
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#define FFMPEG_PARSER_H |
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#include "avcodec.h" |
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#include "ac3.h" |
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typedef struct ParseContext{ |
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uint8_t *buffer; |
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int index; |
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int last_index; |
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unsigned int buffer_size; |
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uint32_t state; ///< contains the last few bytes in MSB order |
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int frame_start_found; |
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int overread; ///< the number of bytes which where irreversibly read from the next frame |
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int overread_index; ///< the index into ParseContext.buffer of the overread bytes |
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} ParseContext; |
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struct MpegEncContext; |
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typedef struct ParseContext1{ |
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ParseContext pc; |
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/* XXX/FIXME PC1 vs. PC */ |
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/* MPEG2 specific */ |
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AVRational frame_rate; |
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int progressive_sequence; |
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int width, height; |
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/* XXX: suppress that, needed by MPEG4 */ |
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struct MpegEncContext *enc; |
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int first_picture; |
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} ParseContext1; |
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#define END_NOT_FOUND (-100) |
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int ff_combine_frame(ParseContext *pc, int next, uint8_t **buf, int *buf_size); |
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int ff_mpeg4video_split(AVCodecContext *avctx, const uint8_t *buf, |
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int buf_size); |
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void ff_parse_close(AVCodecParserContext *s); |
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void ff_parse1_close(AVCodecParserContext *s); |
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/* h263dec.c */ |
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int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size); |
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/** |
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* Parses AC-3 frame header. |
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* Parses the header up to the lfeon element, which is the first 52 or 54 bits |
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* depending on the audio coding mode. |
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* @param buf[in] Array containing the first 7 bytes of the frame. |
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* @param hdr[out] Pointer to struct where header info is written. |
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* @return Returns 0 on success, -1 if there is a sync word mismatch, |
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* -2 if the bsid (version) element is invalid, -3 if the fscod (sample rate) |
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* element is invalid, or -4 if the frmsizecod (bit rate) element is invalid. |
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*/ |
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int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr); |
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#endif /* !FFMPEG_PARSER_H */
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