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83 lines
2.6 KiB
83 lines
2.6 KiB
/* |
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* MPEGVideo decoders header |
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard |
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* Copyright (c) 2002-2004 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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/** |
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* @file |
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* mpegvideo decoder header. |
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*/ |
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#ifndef AVCODEC_MPEGVIDEODEC_H |
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#define AVCODEC_MPEGVIDEODEC_H |
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#include "libavutil/frame.h" |
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#include "libavutil/log.h" |
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#include "avcodec.h" |
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#include "get_bits.h" |
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#include "mpegpicture.h" |
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#include "mpegvideo.h" |
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#include "mpegvideodata.h" |
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#define FF_MPV_QSCALE_TYPE_MPEG1 0 |
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#define FF_MPV_QSCALE_TYPE_MPEG2 1 |
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/** |
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* Initialize the given MpegEncContext for decoding. |
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* the changed fields will not depend upon |
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* the prior state of the MpegEncContext. |
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*/ |
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void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx); |
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int ff_mpv_common_frame_size_change(MpegEncContext *s); |
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int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx); |
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void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64]); |
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void ff_mpv_report_decode_progress(MpegEncContext *s); |
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void ff_mpv_frame_end(MpegEncContext *s); |
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int ff_mpv_export_qp_table(const MpegEncContext *s, AVFrame *f, const Picture *p, int qp_type); |
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int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src); |
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void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h); |
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void ff_mpeg_flush(AVCodecContext *avctx); |
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void ff_print_debug_info(const MpegEncContext *s, const Picture *p, AVFrame *pict); |
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static inline int mpeg_get_qscale(MpegEncContext *s) |
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{ |
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int qscale = get_bits(&s->gb, 5); |
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if (s->q_scale_type) |
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return ff_mpeg2_non_linear_qscale[qscale]; |
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else |
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return qscale << 1; |
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} |
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static inline int check_marker(void *logctx, GetBitContext *s, const char *msg) |
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{ |
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int bit = get_bits1(s); |
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if (!bit) |
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av_log(logctx, AV_LOG_INFO, "Marker bit missing at %d of %d %s\n", |
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get_bits_count(s) - 1, s->size_in_bits, msg); |
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return bit; |
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} |
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#endif /* AVCODEC_MPEGVIDEODEC_H */
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