2005-03-23 18:00:15 +01:00
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/*****************************************************************************
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* nuv.c:
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*****************************************************************************
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2005-07-09 08:17:09 +02:00
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* Copyright (C) 2005 the VideoLAN team
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2006-01-13 00:10:04 +01:00
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* $Id$
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2005-03-23 18:00:15 +01:00
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*
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* Authors: Laurent Aimar <fenrir@via.ecp.fr>
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2008-09-01 00:44:51 +02:00
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* Gertjan Van Droogenbroeck <gertjanvd _PLUS_ vlc _AT_ gmail _DOT_ com>
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2005-03-23 18:00:15 +01:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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2006-01-13 00:10:04 +01:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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2005-03-23 18:00:15 +01:00
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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2008-01-23 22:50:58 +01:00
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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2008-05-31 20:49:57 +02:00
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#include <vlc_common.h>
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2008-05-08 17:30:33 +02:00
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#include <vlc_plugin.h>
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2006-11-26 15:20:34 +01:00
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#include <vlc_demux.h>
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2005-03-23 18:00:15 +01:00
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/* TODO:
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* - test
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*/
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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static int Open ( vlc_object_t * );
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static void Close ( vlc_object_t * );
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2008-10-29 20:59:01 +01:00
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vlc_module_begin ()
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set_category( CAT_INPUT )
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set_subcategory( SUBCAT_INPUT_DEMUX )
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set_description( N_("Nuv demuxer") )
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set_capability( "demux", 145 )
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set_callbacks( Open, Close )
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add_shortcut( "nuv" )
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vlc_module_end ()
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2005-03-23 18:00:15 +01:00
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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static int Demux ( demux_t * );
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static int Control( demux_t *, int, va_list );
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/* */
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typedef struct
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{
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int64_t i_time;
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int64_t i_offset;
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} demux_index_entry_t;
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typedef struct
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{
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int i_idx;
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int i_idx_max;
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demux_index_entry_t *idx;
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} demux_index_t;
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static void demux_IndexInit( demux_index_t * );
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static void demux_IndexClean( demux_index_t * );
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static void demux_IndexAppend( demux_index_t *,
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int64_t i_time, int64_t i_offset );
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/* Convert a time into offset */
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static int64_t demux_IndexConvertTime( demux_index_t *, int64_t i_time );
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/* Find the nearest offset in the index */
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static int64_t demux_IndexFindOffset( demux_index_t *, int64_t i_offset );
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/* */
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typedef struct
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{
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char id[12]; /* "NuppelVideo\0" or "MythTVVideo\0" */
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char version[5]; /* "x.xx\0" */
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int i_width;
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int i_height;
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int i_width_desired;
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int i_height_desired;
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char i_mode; /* P progressive, I interlaced */
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double d_aspect; /* 1.0 squared pixel */
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double d_fps;
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int i_video_blocks; /* 0 no video, -1 unknown */
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int i_audio_blocks;
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int i_text_blocks;
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int i_keyframe_distance;
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} header_t;
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2008-09-01 00:44:51 +02:00
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#define NUV_FH_SIZE 12
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2005-03-23 18:00:15 +01:00
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typedef struct
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{
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char i_type; /* A: audio, V: video, S: sync; T: test
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R: Seekpoint (string:RTjjjjjjjj)
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2008-09-01 00:44:51 +02:00
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D: Extra data for codec
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X: extended data Q: seektable */
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2005-03-23 18:00:15 +01:00
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char i_compression; /* V: 0 uncompressed
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1 RTJpeg
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2 RTJpeg+lzo
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N black frame
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L copy last
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A: 0 uncompressed (44100 1-bits, 2ch)
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1 lzo
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2 layer 2
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3 layer 3
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F flac
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S shorten
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N null frame loudless
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L copy last
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S: B audio and vdeo sync point
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A audio sync info (timecode == effective
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dsp frequency*100)
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V next video sync (timecode == next video
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frame num)
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S audio,video,text correlation */
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char i_keyframe; /* 0 keyframe, else no no key frame */
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uint8_t i_filters; /* 0x01: gauss 5 pixel (8,2,2,2,2)/16
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0x02: gauss 5 pixel (8,1,1,1,1)/12
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0x04: cartoon filter */
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int i_timecode; /* ms */
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int i_length; /* V,A,T: length of following data
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S: length of packet correl */
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} frame_header_t;
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typedef struct
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{
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int i_version;
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vlc_fourcc_t i_video_fcc;
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vlc_fourcc_t i_audio_fcc;
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int i_audio_sample_rate;
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int i_audio_bits_per_sample;
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int i_audio_channels;
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int i_audio_compression_ratio;
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int i_audio_quality;
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int i_rtjpeg_quality;
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int i_rtjpeg_luma_filter;
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int i_rtjpeg_chroma_filter;
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int i_lavc_bitrate;
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int i_lavc_qmin;
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int i_lavc_qmax;
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int i_lavc_maxqdiff;
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2008-09-01 00:44:51 +02:00
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int64_t i_seektable_offset;
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2005-03-23 18:00:15 +01:00
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int64_t i_keyframe_adjust_offset;
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} extended_header_t;
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struct demux_sys_t
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{
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header_t hdr;
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extended_header_t exh;
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int64_t i_pcr;
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es_out_id_t *p_es_video;
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int i_extra_f;
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uint8_t *p_extra_f;
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es_out_id_t *p_es_audio;
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/* index */
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demux_index_t idx;
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2008-09-01 00:44:51 +02:00
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bool b_index;
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bool b_seekable;
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/* frameheader buffer */
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uint8_t fh_buffer[NUV_FH_SIZE];
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int64_t i_total_frames;
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int64_t i_total_length;
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/* first frame position (used for calculating size without seektable) */
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int i_first_frame_offset;
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2005-03-23 18:00:15 +01:00
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};
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static int HeaderLoad( demux_t *, header_t *h );
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static int FrameHeaderLoad( demux_t *, frame_header_t *h );
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static int ExtendedHeaderLoad( demux_t *, extended_header_t *h );
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2008-09-01 00:44:51 +02:00
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static int SeekTableLoad( demux_t *, demux_sys_t * );
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static int ControlSetPosition( demux_t *p_demux, int64_t i_pos, bool b_guess );
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2005-03-23 18:00:15 +01:00
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/*****************************************************************************
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* Open: initializes ES structures
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*****************************************************************************/
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static int Open( vlc_object_t * p_this )
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{
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demux_t *p_demux = (demux_t*)p_this;
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demux_sys_t *p_sys;
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2007-09-30 17:40:34 +02:00
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const uint8_t *p_peek;
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2005-03-23 18:00:15 +01:00
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frame_header_t fh;
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2008-04-14 00:08:29 +02:00
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bool b_extended;
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2005-03-23 18:00:15 +01:00
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/* Check id */
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if( stream_Peek( p_demux->s, &p_peek, 12 ) != 12 ||
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2005-07-11 18:20:33 +02:00
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( strncmp( (char *)p_peek, "MythTVVideo", 11 ) &&
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strncmp( (char *)p_peek, "NuppelVideo", 11 ) ) )
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2005-03-23 18:00:15 +01:00
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return VLC_EGENERIC;
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p_sys = malloc( sizeof( demux_sys_t ) );
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2008-09-01 00:44:51 +02:00
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if( p_sys == NULL )
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return VLC_ENOMEM;
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2005-03-23 18:00:15 +01:00
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memset( p_sys, 0, sizeof( demux_sys_t ) );
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p_sys->p_es_video = NULL;
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p_sys->p_es_audio = NULL;
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p_sys->p_extra_f = NULL;
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p_sys->i_pcr = -1;
|
2008-09-01 00:44:51 +02:00
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p_sys->b_index = false;
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p_sys->i_total_frames = -1;
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p_sys->i_total_length = -1;
|
2005-03-23 18:00:15 +01:00
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demux_IndexInit( &p_sys->idx );
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2008-09-01 00:44:51 +02:00
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p_demux->p_sys = p_sys;
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/* Info about the stream */
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stream_Control( p_demux->s, STREAM_CAN_SEEK, &p_sys->b_seekable );
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#if 0
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if( p_sys->b_seekable )
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msg_Dbg( p_demux, "stream is seekable" );
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else
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msg_Dbg( p_demux, "stream is NOT seekable" );
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#endif
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2005-03-23 18:00:15 +01:00
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if( HeaderLoad( p_demux, &p_sys->hdr ) )
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goto error;
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/* Load 'D' */
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if( FrameHeaderLoad( p_demux, &fh ) || fh.i_type != 'D' )
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goto error;
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if( fh.i_length > 0 )
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{
|
2008-09-01 00:44:51 +02:00
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if( fh.i_compression == 'F' || fh.i_compression == 'R' )
|
2005-03-23 18:00:15 +01:00
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{
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/* ffmpeg extra data */
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p_sys->i_extra_f = fh.i_length;
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p_sys->p_extra_f = malloc( fh.i_length );
|
2008-09-01 00:44:51 +02:00
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if( p_sys->p_extra_f == NULL || stream_Read( p_demux->s,
|
2005-03-23 18:00:15 +01:00
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p_sys->p_extra_f, fh.i_length ) != fh.i_length )
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goto error;
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}
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else
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{
|
2005-08-04 18:50:18 +02:00
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msg_Warn( p_demux, "unsupported 'D' frame (c=%c)", fh.i_compression );
|
2005-03-23 18:00:15 +01:00
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if( stream_Read( p_demux->s, NULL, fh.i_length ) != fh.i_length )
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goto error;
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}
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}
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/* Check and load extented */
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if( stream_Peek( p_demux->s, &p_peek, 1 ) != 1 )
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goto error;
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if( p_peek[0] == 'X' )
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{
|
2008-04-14 00:08:29 +02:00
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|
b_extended = true;
|
2005-03-23 18:00:15 +01:00
|
|
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|
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if( FrameHeaderLoad( p_demux, &fh ) )
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|
goto error;
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if( fh.i_length != 512 )
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|
goto error;
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|
|
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|
if( ExtendedHeaderLoad( p_demux, &p_sys->exh ) )
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|
goto error;
|
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|
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|
2008-09-01 00:44:51 +02:00
|
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|
if( !p_sys->b_seekable )
|
|
|
|
msg_Warn( p_demux, "stream is not seekable, skipping seektable" );
|
|
|
|
else if( SeekTableLoad( p_demux, p_sys ) )
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|
|
|
goto error;
|
|
|
|
|
2005-03-23 18:00:15 +01:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2008-04-14 00:08:29 +02:00
|
|
|
b_extended = false;
|
2005-03-23 18:00:15 +01:00
|
|
|
|
|
|
|
/* XXX: for now only file with extended chunk are supported
|
|
|
|
* why: because else we need to have support for rtjpeg+stupid nuv shit */
|
|
|
|
msg_Err( p_demux, "incomplete NUV support (upload samples)" );
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Create audio/video (will work only with extended header and audio=mp3 */
|
|
|
|
if( p_sys->hdr.i_video_blocks != 0 )
|
|
|
|
{
|
|
|
|
es_format_t fmt;
|
|
|
|
|
|
|
|
es_format_Init( &fmt, VIDEO_ES, p_sys->exh.i_video_fcc );
|
|
|
|
fmt.video.i_width = p_sys->hdr.i_width;
|
|
|
|
fmt.video.i_height = p_sys->hdr.i_height;
|
|
|
|
fmt.i_extra = p_sys->i_extra_f;
|
|
|
|
fmt.p_extra = p_sys->p_extra_f;
|
2009-12-16 21:54:54 +01:00
|
|
|
fmt.video.i_sar_num = p_sys->hdr.d_aspect * fmt.video.i_height;
|
|
|
|
fmt.video.i_sar_den = fmt.video.i_width;
|
2005-03-23 18:00:15 +01:00
|
|
|
|
|
|
|
p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
|
|
|
|
}
|
|
|
|
if( p_sys->hdr.i_audio_blocks != 0 )
|
|
|
|
{
|
|
|
|
es_format_t fmt;
|
|
|
|
|
2009-05-11 20:49:09 +02:00
|
|
|
es_format_Init( &fmt, AUDIO_ES, VLC_CODEC_MPGA );
|
2005-03-23 18:00:15 +01:00
|
|
|
fmt.audio.i_rate = p_sys->exh.i_audio_sample_rate;
|
|
|
|
fmt.audio.i_bitspersample = p_sys->exh.i_audio_bits_per_sample;
|
|
|
|
|
|
|
|
p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
|
|
|
|
}
|
|
|
|
if( p_sys->hdr.i_text_blocks != 0 )
|
|
|
|
{
|
|
|
|
msg_Warn( p_demux, "text not yet supported (upload samples)" );
|
|
|
|
}
|
|
|
|
|
2008-09-01 00:44:51 +02:00
|
|
|
p_sys->i_first_frame_offset = stream_Tell( p_demux->s );
|
2005-03-23 18:00:15 +01:00
|
|
|
|
|
|
|
/* Fill p_demux fields */
|
|
|
|
p_demux->pf_demux = Demux;
|
|
|
|
p_demux->pf_control = Control;
|
|
|
|
|
|
|
|
return VLC_SUCCESS;
|
|
|
|
|
|
|
|
error:
|
|
|
|
msg_Warn( p_demux, "cannot load Nuv file" );
|
2008-09-01 00:44:51 +02:00
|
|
|
p_demux->p_sys = NULL;
|
2005-03-23 18:00:15 +01:00
|
|
|
free( p_sys );
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
|
|
* Close: frees unused data
|
|
|
|
*****************************************************************************/
|
|
|
|
static void Close( vlc_object_t * p_this )
|
|
|
|
{
|
|
|
|
demux_t *p_demux = (demux_t*)p_this;
|
|
|
|
demux_sys_t *p_sys = p_demux->p_sys;
|
|
|
|
|
2008-03-14 00:24:00 +01:00
|
|
|
free( p_sys->p_extra_f );
|
2005-03-23 18:00:15 +01:00
|
|
|
demux_IndexClean( &p_sys->idx );
|
|
|
|
free( p_sys );
|
|
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
|
|
* Demux: reads and demuxes data packets
|
|
|
|
*****************************************************************************
|
|
|
|
* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
|
|
|
|
*****************************************************************************/
|
|
|
|
static int Demux( demux_t *p_demux )
|
|
|
|
{
|
|
|
|
demux_sys_t *p_sys = p_demux->p_sys;
|
|
|
|
frame_header_t fh;
|
|
|
|
block_t *p_data;
|
|
|
|
|
|
|
|
for( ;; )
|
|
|
|
{
|
2008-07-05 13:43:08 +02:00
|
|
|
if( !vlc_object_alive (p_demux) )
|
2005-03-23 18:00:15 +01:00
|
|
|
return -1;
|
|
|
|
|
|
|
|
if( FrameHeaderLoad( p_demux, &fh ) )
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if( fh.i_type == 'A' || fh.i_type == 'V' )
|
|
|
|
break;
|
|
|
|
|
|
|
|
/* TODO add support for some block type */
|
|
|
|
|
2008-09-01 00:44:51 +02:00
|
|
|
if( fh.i_type != 'R' && fh.i_length > 0 )
|
2005-03-23 18:00:15 +01:00
|
|
|
{
|
2008-09-01 00:44:51 +02:00
|
|
|
if( stream_Read( p_demux->s, NULL, fh.i_length ) != fh.i_length )
|
|
|
|
return -1;
|
2005-03-23 18:00:15 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* */
|
2008-10-09 13:44:17 +02:00
|
|
|
if( ( p_data = stream_Block( p_demux->s, fh.i_length ) ) == NULL )
|
|
|
|
return 0;
|
|
|
|
|
2009-12-20 21:11:47 +01:00
|
|
|
p_data->i_dts = VLC_TS_0 + (int64_t)fh.i_timecode * 1000;
|
|
|
|
p_data->i_pts = (fh.i_type == 'V') ? VLC_TS_INVALID : p_data->i_dts;
|
2005-03-23 18:00:15 +01:00
|
|
|
|
2008-09-01 00:44:51 +02:00
|
|
|
/* only add keyframes to index */
|
|
|
|
if( !fh.i_keyframe && !p_sys->b_index )
|
2009-12-20 21:11:47 +01:00
|
|
|
demux_IndexAppend( &p_sys->idx,
|
|
|
|
p_data->i_dts - VLC_TS_0,
|
|
|
|
stream_Tell(p_demux->s) - NUV_FH_SIZE );
|
2005-03-23 18:00:15 +01:00
|
|
|
|
|
|
|
/* */
|
2009-12-20 21:11:47 +01:00
|
|
|
if( p_sys->i_pcr < 0 || p_sys->i_pcr < p_data->i_dts - VLC_TS_0 )
|
2005-03-23 18:00:15 +01:00
|
|
|
{
|
2009-12-20 21:11:47 +01:00
|
|
|
p_sys->i_pcr = p_data->i_dts - VLC_TS_0;
|
|
|
|
es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + p_sys->i_pcr );
|
2005-03-23 18:00:15 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
if( fh.i_type == 'A' && p_sys->p_es_audio )
|
|
|
|
{
|
|
|
|
if( fh.i_compression == '3' )
|
|
|
|
es_out_Send( p_demux->out, p_sys->p_es_audio, p_data );
|
|
|
|
else
|
|
|
|
{
|
|
|
|
msg_Dbg( p_demux, "unsupported compression %c for audio (upload samples)", fh.i_compression );
|
|
|
|
block_Release( p_data );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else if( fh.i_type == 'V' && p_sys->p_es_video )
|
|
|
|
{
|
2008-09-01 00:44:51 +02:00
|
|
|
if( fh.i_compression >='0' && fh.i_compression <='3' )
|
|
|
|
{
|
|
|
|
/* for rtjpeg data, the header is also needed */
|
|
|
|
p_data = block_Realloc( p_data, NUV_FH_SIZE, fh.i_length );
|
|
|
|
memcpy( p_data->p_buffer, p_sys->fh_buffer, NUV_FH_SIZE );
|
|
|
|
}
|
|
|
|
/* 0,1,2,3 -> rtjpeg, >=4 mpeg4 */
|
|
|
|
if( fh.i_compression >= '0' )
|
2005-03-23 18:00:15 +01:00
|
|
|
es_out_Send( p_demux->out, p_sys->p_es_video, p_data );
|
|
|
|
else
|
|
|
|
{
|
|
|
|
msg_Dbg( p_demux, "unsupported compression %c for video (upload samples)", fh.i_compression );
|
|
|
|
block_Release( p_data );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
block_Release( p_data );
|
|
|
|
}
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
|
|
* Control:
|
|
|
|
*****************************************************************************/
|
|
|
|
static int Control( demux_t *p_demux, int i_query, va_list args )
|
|
|
|
{
|
|
|
|
demux_sys_t *p_sys = p_demux->p_sys;
|
|
|
|
|
|
|
|
double f, *pf;
|
|
|
|
int64_t i64, *pi64;
|
|
|
|
|
|
|
|
switch( i_query )
|
|
|
|
{
|
|
|
|
|
|
|
|
case DEMUX_GET_POSITION:
|
|
|
|
pf = (double*)va_arg( args, double * );
|
2008-09-01 00:44:51 +02:00
|
|
|
|
|
|
|
if( p_sys->i_total_length > 0 && p_sys->i_pcr >= 0 )
|
|
|
|
{
|
|
|
|
*pf = (double)p_sys->i_pcr / (double)p_sys->i_total_length;
|
|
|
|
}
|
2005-03-23 18:00:15 +01:00
|
|
|
else
|
2008-09-01 00:44:51 +02:00
|
|
|
{
|
|
|
|
i64 = stream_Size( p_demux->s );
|
|
|
|
if( i64 > 0 )
|
2009-08-24 22:25:20 +02:00
|
|
|
{
|
|
|
|
const double f_current = stream_Tell( p_demux->s );
|
|
|
|
*pf = f_current / (double)i64;
|
|
|
|
}
|
2008-09-01 00:44:51 +02:00
|
|
|
else
|
2009-08-24 22:25:20 +02:00
|
|
|
{
|
2008-09-01 00:44:51 +02:00
|
|
|
*pf = 0.0;
|
2009-08-24 22:25:20 +02:00
|
|
|
}
|
2008-09-01 00:44:51 +02:00
|
|
|
}
|
2005-03-23 18:00:15 +01:00
|
|
|
return VLC_SUCCESS;
|
|
|
|
|
|
|
|
case DEMUX_SET_POSITION:
|
|
|
|
{
|
|
|
|
int64_t i_pos;
|
|
|
|
|
|
|
|
f = (double)va_arg( args, double );
|
|
|
|
|
|
|
|
p_sys->i_pcr = -1;
|
|
|
|
|
2008-09-01 00:44:51 +02:00
|
|
|
/* first try to see if we can seek based on time (== GET_LENGTH works) */
|
|
|
|
if( p_sys->i_total_length > 0 && ( i_pos = demux_IndexConvertTime( &p_sys->idx, p_sys->i_total_length * f ) ) > 0 )
|
|
|
|
return ControlSetPosition( p_demux, i_pos, false );
|
2005-03-23 18:00:15 +01:00
|
|
|
|
2008-09-01 00:44:51 +02:00
|
|
|
/* if not search based on total stream size */
|
|
|
|
else if( ( i_pos = demux_IndexFindOffset( &p_sys->idx, stream_Size( p_demux->s ) * f ) ) >= 0 )
|
|
|
|
return ControlSetPosition( p_demux, i_pos, false );
|
2008-08-25 18:48:00 +02:00
|
|
|
|
2008-09-01 00:44:51 +02:00
|
|
|
else if( ( i_pos = p_sys->i_first_frame_offset + ( stream_Size( p_demux->s ) - p_sys->i_first_frame_offset ) * f ) >= 0 )
|
|
|
|
return ControlSetPosition( p_demux, i_pos, true );
|
2008-08-25 18:48:00 +02:00
|
|
|
|
2008-09-01 00:44:51 +02:00
|
|
|
else
|
|
|
|
return VLC_EGENERIC;
|
2005-03-23 18:00:15 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
case DEMUX_GET_TIME:
|
|
|
|
pi64 = (int64_t*)va_arg( args, int64_t * );
|
|
|
|
*pi64 = p_sys->i_pcr >= 0 ? p_sys->i_pcr : 0;
|
|
|
|
return VLC_SUCCESS;
|
|
|
|
|
|
|
|
case DEMUX_SET_TIME:
|
|
|
|
{
|
|
|
|
int64_t i_pos;
|
|
|
|
i64 = (int64_t)va_arg( args, int64_t );
|
|
|
|
|
2008-09-01 00:44:51 +02:00
|
|
|
p_sys->i_pcr = -1;
|
|
|
|
|
2005-03-23 18:00:15 +01:00
|
|
|
i_pos = demux_IndexConvertTime( &p_sys->idx, i64 );
|
|
|
|
if( i_pos < 0 )
|
|
|
|
return VLC_EGENERIC;
|
2008-09-01 00:44:51 +02:00
|
|
|
else
|
|
|
|
return ControlSetPosition( p_demux, i_pos, false );
|
2008-08-25 13:58:18 +02:00
|
|
|
}
|
|
|
|
|
2008-08-25 18:48:00 +02:00
|
|
|
case DEMUX_GET_LENGTH:
|
|
|
|
pi64 = (int64_t*)va_arg( args, int64_t * );
|
2008-09-01 00:44:51 +02:00
|
|
|
if( p_sys->i_total_length >= 0 )
|
|
|
|
{
|
|
|
|
*pi64 = p_sys->i_total_length;
|
|
|
|
return VLC_SUCCESS;
|
|
|
|
}
|
|
|
|
else if( stream_Tell( p_demux->s ) > p_sys->i_first_frame_offset )
|
|
|
|
{
|
|
|
|
/* This should give an approximation of the total duration */
|
|
|
|
*pi64 = (double)( stream_Size( p_demux->s ) - p_sys->i_first_frame_offset ) /
|
|
|
|
(double)( stream_Tell( p_demux->s ) - p_sys->i_first_frame_offset )
|
|
|
|
* (double)( p_sys->i_pcr >= 0 ? p_sys->i_pcr : 0 );
|
|
|
|
return VLC_SUCCESS;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
return VLC_EGENERIC;
|
2008-08-25 13:58:18 +02:00
|
|
|
|
2008-08-25 18:48:00 +02:00
|
|
|
case DEMUX_GET_FPS:
|
|
|
|
pf = (double*)va_arg( args, double * );
|
|
|
|
*pf = p_sys->hdr.d_fps;
|
|
|
|
return VLC_SUCCESS;
|
2008-08-25 13:58:18 +02:00
|
|
|
|
2008-08-25 18:48:00 +02:00
|
|
|
case DEMUX_GET_META:
|
|
|
|
default:
|
2008-08-25 13:58:18 +02:00
|
|
|
return VLC_EGENERIC;
|
|
|
|
|
|
|
|
}
|
|
|
|
}
|
2008-09-01 00:44:51 +02:00
|
|
|
static int ControlSetPosition( demux_t *p_demux, int64_t i_pos, bool b_guess )
|
|
|
|
{
|
|
|
|
demux_sys_t *p_sys = p_demux->p_sys;
|
|
|
|
|
|
|
|
if( i_pos < 0 )
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
|
|
|
|
/* if we can seek in the stream */
|
|
|
|
if( p_sys->b_seekable && !b_guess )
|
|
|
|
{
|
|
|
|
if( stream_Seek( p_demux->s, i_pos ) )
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* forward seek */
|
|
|
|
if( i_pos > stream_Tell( p_demux->s ) )
|
|
|
|
{
|
|
|
|
msg_Dbg( p_demux, "unable to seek, skipping frames (slow)" );
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
msg_Warn( p_demux, "unable to seek, only forward seeking is possible" );
|
|
|
|
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
while( vlc_object_alive (p_demux) )
|
|
|
|
{
|
|
|
|
frame_header_t fh;
|
|
|
|
int64_t i_tell;
|
|
|
|
|
|
|
|
if( ( i_tell = stream_Tell( p_demux->s ) ) >= i_pos )
|
|
|
|
break;
|
|
|
|
|
|
|
|
if( FrameHeaderLoad( p_demux, &fh ) )
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
|
|
|
|
if( fh.i_type == 'A' || fh.i_type == 'V' )
|
|
|
|
{
|
|
|
|
if( !fh.i_keyframe && !p_sys->b_index )
|
|
|
|
demux_IndexAppend( &p_sys->idx,(int64_t)fh.i_timecode*1000, i_tell );
|
|
|
|
}
|
|
|
|
|
|
|
|
if( fh.i_type != 'R' && fh.i_length > 0 )
|
|
|
|
{
|
|
|
|
if( stream_Read( p_demux->s, NULL, fh.i_length ) != fh.i_length )
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return VLC_SUCCESS;
|
|
|
|
}
|
2005-03-23 18:00:15 +01:00
|
|
|
|
|
|
|
/*****************************************************************************
|
|
|
|
*
|
|
|
|
*****************************************************************************/
|
|
|
|
static inline void GetDoubleLE( double *pd, void *src )
|
|
|
|
{
|
|
|
|
/* FIXME works only if sizeof(double) == 8 */
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
2005-03-24 17:05:55 +01:00
|
|
|
uint8_t *p = (uint8_t*)pd, *q = (uint8_t*)src;
|
2005-03-23 18:00:15 +01:00
|
|
|
int i;
|
|
|
|
for( i = 0; i < 8; i++ )
|
2005-03-24 17:05:55 +01:00
|
|
|
p[i] = q[7-i];
|
2005-03-23 18:00:15 +01:00
|
|
|
#else
|
|
|
|
memcpy( pd, src, 8 );
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
/* HeaderLoad:
|
|
|
|
*/
|
|
|
|
static int HeaderLoad( demux_t *p_demux, header_t *h )
|
|
|
|
{
|
|
|
|
uint8_t buffer[72];
|
|
|
|
|
|
|
|
if( stream_Read( p_demux->s, buffer, 72 ) != 72 )
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
|
|
|
|
/* XXX: they are alignment to take care of (another broken format) */
|
|
|
|
memcpy( h->id, &buffer[ 0], 12 );
|
|
|
|
memcpy( h->version, &buffer[12], 5 );
|
|
|
|
h->i_width = GetDWLE( &buffer[20] );
|
|
|
|
h->i_height = GetDWLE( &buffer[24] );
|
|
|
|
h->i_width_desired = GetDWLE( &buffer[28] );
|
|
|
|
h->i_height_desired = GetDWLE( &buffer[32] );
|
|
|
|
h->i_mode = buffer[36];
|
|
|
|
GetDoubleLE( &h->d_aspect, &buffer[40] );
|
|
|
|
GetDoubleLE( &h->d_fps, &buffer[48] );
|
|
|
|
h->i_video_blocks = GetDWLE( &buffer[56] );
|
|
|
|
h->i_audio_blocks = GetDWLE( &buffer[60] );
|
|
|
|
h->i_text_blocks = GetDWLE( &buffer[64] );
|
|
|
|
h->i_keyframe_distance = GetDWLE( &buffer[68] );
|
|
|
|
#if 0
|
|
|
|
msg_Dbg( p_demux, "nuv: h=%s v=%s %dx%d a=%f fps=%f v=%d a=%d t=%d kfd=%d",
|
|
|
|
h->id, h->version, h->i_width, h->i_height, h->d_aspect,
|
|
|
|
h->d_fps, h->i_video_blocks, h->i_audio_blocks, h->i_text_blocks,
|
|
|
|
h->i_keyframe_distance );
|
|
|
|
#endif
|
|
|
|
return VLC_SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* FrameHeaderLoad:
|
|
|
|
*/
|
|
|
|
static int FrameHeaderLoad( demux_t *p_demux, frame_header_t *h )
|
|
|
|
{
|
2008-09-01 00:44:51 +02:00
|
|
|
uint8_t* buffer = p_demux->p_sys->fh_buffer;
|
2005-03-23 18:00:15 +01:00
|
|
|
|
|
|
|
if( stream_Read( p_demux->s, buffer, 12 ) != 12 )
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
|
|
|
|
h->i_type = buffer[0];
|
|
|
|
h->i_compression = buffer[1];
|
|
|
|
h->i_keyframe = buffer[2];
|
|
|
|
h->i_filters = buffer[3];
|
|
|
|
|
|
|
|
h->i_timecode = GetDWLE( &buffer[4] );
|
|
|
|
h->i_length = GetDWLE( &buffer[8] );
|
|
|
|
#if 0
|
|
|
|
msg_Dbg( p_demux, "frame hdr: t=%c c=%c k=%d f=0x%x timecode=%d l=%d",
|
|
|
|
h->i_type,
|
|
|
|
h->i_compression ? h->i_compression : ' ',
|
|
|
|
h->i_keyframe ? h->i_keyframe : ' ',
|
|
|
|
h->i_filters,
|
|
|
|
h->i_timecode, h->i_length );
|
|
|
|
#endif
|
|
|
|
return VLC_SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ExtendedHeaderLoad( demux_t *p_demux, extended_header_t *h )
|
|
|
|
{
|
|
|
|
uint8_t buffer[512];
|
|
|
|
|
|
|
|
if( stream_Read( p_demux->s, buffer, 512 ) != 512 )
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
|
|
|
|
h->i_version = GetDWLE( &buffer[0] );
|
|
|
|
h->i_video_fcc = VLC_FOURCC( buffer[4], buffer[5], buffer[6], buffer[7] );
|
|
|
|
h->i_audio_fcc = VLC_FOURCC( buffer[8], buffer[9], buffer[10], buffer[11] );
|
|
|
|
h->i_audio_sample_rate = GetDWLE( &buffer[12] );
|
|
|
|
h->i_audio_bits_per_sample = GetDWLE( &buffer[16] );
|
|
|
|
h->i_audio_channels = GetDWLE( &buffer[20] );
|
|
|
|
h->i_audio_compression_ratio = GetDWLE( &buffer[24] );
|
|
|
|
h->i_audio_quality = GetDWLE( &buffer[28] );
|
|
|
|
h->i_rtjpeg_quality = GetDWLE( &buffer[32] );
|
|
|
|
h->i_rtjpeg_luma_filter = GetDWLE( &buffer[36] );
|
|
|
|
h->i_rtjpeg_chroma_filter = GetDWLE( &buffer[40] );
|
|
|
|
h->i_lavc_bitrate = GetDWLE( &buffer[44] );
|
|
|
|
h->i_lavc_qmin = GetDWLE( &buffer[48] );
|
|
|
|
h->i_lavc_qmin = GetDWLE( &buffer[52] );
|
|
|
|
h->i_lavc_maxqdiff = GetDWLE( &buffer[56] );
|
2008-09-01 00:44:51 +02:00
|
|
|
h->i_seektable_offset = GetQWLE( &buffer[60] );
|
2005-03-23 18:00:15 +01:00
|
|
|
h->i_keyframe_adjust_offset= GetQWLE( &buffer[68] );
|
|
|
|
#if 0
|
|
|
|
msg_Dbg( p_demux, "ex hdr: v=%d vffc=%4.4s afcc=%4.4s %dHz %dbits ach=%d acr=%d aq=%d"
|
2008-09-01 00:44:51 +02:00
|
|
|
"rtjpeg q=%d lf=%d lc=%d lavc br=%d qmin=%d qmax=%d maxqdiff=%d seekableoff=%"PRIi64" keyfao=%"PRIi64,
|
2005-03-23 18:00:15 +01:00
|
|
|
h->i_version,
|
|
|
|
(char*)&h->i_video_fcc,
|
|
|
|
(char*)&h->i_audio_fcc, h->i_audio_sample_rate, h->i_audio_bits_per_sample, h->i_audio_channels,
|
|
|
|
h->i_audio_compression_ratio, h->i_audio_quality,
|
|
|
|
h->i_rtjpeg_quality, h->i_rtjpeg_luma_filter, h->i_rtjpeg_chroma_filter,
|
|
|
|
h->i_lavc_bitrate, h->i_lavc_qmin, h->i_lavc_qmax, h->i_lavc_maxqdiff,
|
2008-09-01 00:44:51 +02:00
|
|
|
h->i_seektable_offset, h->i_keyframe_adjust_offset );
|
|
|
|
#endif
|
|
|
|
return VLC_SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
typedef struct
|
|
|
|
{
|
|
|
|
int64_t i_file_offset;
|
|
|
|
int32_t i_keyframe_number;
|
|
|
|
} seektable_entry_t;
|
|
|
|
typedef struct
|
|
|
|
{
|
|
|
|
int32_t i_adjust;
|
|
|
|
int32_t i_keyframe_number;
|
|
|
|
} kfatable_entry_t;
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int SeekTableLoad( demux_t *p_demux, demux_sys_t *p_sys )
|
|
|
|
{
|
|
|
|
frame_header_t fh;
|
|
|
|
int64_t i_original_pos;
|
|
|
|
int64_t i_time, i_offset;
|
|
|
|
int keyframe, last_keyframe = 0, frame = 0, kfa_entry_id = 0;
|
|
|
|
|
|
|
|
if( p_sys->exh.i_seektable_offset <= 0 )
|
|
|
|
return VLC_SUCCESS;
|
|
|
|
|
|
|
|
/* Save current position */
|
|
|
|
i_original_pos = stream_Tell( p_demux->s );
|
|
|
|
#if 0
|
|
|
|
msg_Dbg( p_demux, "current offset %"PRIi64, i_original_pos );
|
|
|
|
|
|
|
|
msg_Dbg( p_demux, "seeking in stream to %"PRIi64, p_sys->exh.i_seektable_offset );
|
|
|
|
#endif
|
|
|
|
if( stream_Seek( p_demux->s, p_sys->exh.i_seektable_offset ) )
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
|
|
|
|
if( FrameHeaderLoad( p_demux, &fh ) )
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
|
2009-08-24 22:30:29 +02:00
|
|
|
if( fh.i_type != 'Q' )
|
2008-09-01 00:44:51 +02:00
|
|
|
{
|
|
|
|
msg_Warn( p_demux, "invalid seektable, frame type=%c", fh.i_type );
|
|
|
|
stream_Seek( p_demux->s, i_original_pos );
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
}
|
|
|
|
|
2009-08-24 22:30:29 +02:00
|
|
|
/* */
|
|
|
|
uint8_t *p_seek_table = malloc( fh.i_length );
|
|
|
|
if( p_seek_table == NULL )
|
|
|
|
return VLC_ENOMEM;
|
|
|
|
|
|
|
|
if( stream_Read( p_demux->s, p_seek_table, fh.i_length ) != fh.i_length )
|
|
|
|
{
|
|
|
|
free( p_seek_table );
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
}
|
|
|
|
const int32_t i_seek_elements = fh.i_length / 12;
|
2008-09-01 00:44:51 +02:00
|
|
|
|
|
|
|
/* Get keyframe adjust offsets */
|
2009-08-24 22:30:29 +02:00
|
|
|
int32_t i_kfa_elements;
|
|
|
|
uint8_t *p_kfa_table;
|
|
|
|
|
2008-09-01 00:44:51 +02:00
|
|
|
if( p_sys->exh.i_keyframe_adjust_offset > 0 )
|
|
|
|
{
|
|
|
|
msg_Dbg( p_demux, "seeking in stream to %"PRIi64, p_sys->exh.i_keyframe_adjust_offset );
|
|
|
|
if( stream_Seek( p_demux->s, p_sys->exh.i_keyframe_adjust_offset ) )
|
|
|
|
{
|
|
|
|
free( p_seek_table );
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
}
|
|
|
|
|
|
|
|
if( FrameHeaderLoad( p_demux, &fh ) )
|
|
|
|
{
|
|
|
|
free( p_seek_table );
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
}
|
|
|
|
|
|
|
|
if( fh.i_type == 'K' && fh.i_length >= 8 )
|
|
|
|
{
|
|
|
|
p_kfa_table = malloc( fh.i_length );
|
|
|
|
|
2008-10-09 16:36:54 +02:00
|
|
|
if( p_kfa_table == NULL )
|
2008-09-01 00:44:51 +02:00
|
|
|
{
|
|
|
|
free( p_seek_table );
|
|
|
|
return VLC_ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
if( stream_Read( p_demux->s, p_kfa_table, fh.i_length ) != fh.i_length )
|
|
|
|
{
|
|
|
|
free( p_seek_table );
|
|
|
|
free( p_kfa_table );
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
}
|
|
|
|
|
|
|
|
i_kfa_elements = fh.i_length / 8;
|
|
|
|
}
|
|
|
|
}
|
2009-08-24 22:30:29 +02:00
|
|
|
else
|
|
|
|
{
|
|
|
|
i_kfa_elements = 0;
|
|
|
|
}
|
2008-09-01 00:44:51 +02:00
|
|
|
|
2009-08-24 22:22:55 +02:00
|
|
|
|
2008-09-01 00:44:51 +02:00
|
|
|
if( i_kfa_elements > 0 )
|
|
|
|
msg_Warn( p_demux, "untested keyframe adjust support, upload samples" );
|
|
|
|
|
2009-08-24 22:30:29 +02:00
|
|
|
for( int32_t j = 0; j < i_seek_elements; j++)
|
2008-09-01 00:44:51 +02:00
|
|
|
{
|
|
|
|
#if 0
|
|
|
|
uint8_t* p = p_seek_table + j * 12;
|
|
|
|
msg_Dbg( p_demux, "%x %x %x %x %x %x %x %x %x %x %x %x",
|
|
|
|
p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8], p[9], p[10], p[11]);
|
2005-03-23 18:00:15 +01:00
|
|
|
#endif
|
2008-09-01 00:44:51 +02:00
|
|
|
keyframe = GetDWLE( p_seek_table + j * 12 + 8 );
|
|
|
|
|
|
|
|
frame += (keyframe - last_keyframe) * p_sys->hdr.i_keyframe_distance;
|
|
|
|
|
|
|
|
if( kfa_entry_id < i_kfa_elements && *(int32_t*)(p_kfa_table + kfa_entry_id * 12 + 4) == j )
|
|
|
|
{
|
|
|
|
frame -= *(int32_t*)(p_kfa_table + kfa_entry_id * 12);
|
|
|
|
msg_Dbg( p_demux, "corrected keyframe %d with current frame number %d (corrected with %d)",
|
|
|
|
keyframe, frame, *(int32_t*)(p_kfa_table + kfa_entry_id * 12) );
|
|
|
|
kfa_entry_id++;
|
|
|
|
}
|
|
|
|
|
|
|
|
i_time = (double)( (int64_t)frame * 1000000 ) / p_sys->hdr.d_fps;
|
|
|
|
i_offset = GetQWLE( p_seek_table + j * 12 );
|
|
|
|
|
|
|
|
if( i_offset == 0 && i_time != 0 )
|
|
|
|
msg_Dbg( p_demux, "invalid file offset %d %"PRIi64, keyframe, i_offset );
|
|
|
|
else
|
|
|
|
{
|
|
|
|
demux_IndexAppend( &p_sys->idx, i_time , i_offset );
|
|
|
|
#if 0
|
|
|
|
msg_Dbg( p_demux, "adding entry position %d %"PRIi64 " file offset %"PRIi64, keyframe, i_time, i_offset );
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
last_keyframe = keyframe;
|
|
|
|
}
|
|
|
|
|
|
|
|
p_sys->i_total_frames = (int64_t)frame;
|
|
|
|
|
|
|
|
p_sys->b_index = true;
|
|
|
|
|
|
|
|
p_sys->i_total_length = p_sys->i_total_frames * 1000000 / p_sys->hdr.d_fps;
|
|
|
|
|
|
|
|
msg_Dbg( p_demux, "index table loaded (%d elements)", i_seek_elements );
|
|
|
|
|
|
|
|
if( i_kfa_elements )
|
|
|
|
free ( p_kfa_table );
|
|
|
|
|
|
|
|
free ( p_seek_table );
|
|
|
|
|
|
|
|
/* Restore stream position */
|
|
|
|
if( stream_Seek( p_demux->s, i_original_pos ) )
|
|
|
|
return VLC_EGENERIC;
|
|
|
|
|
2005-03-23 18:00:15 +01:00
|
|
|
return VLC_SUCCESS;
|
2008-09-01 00:44:51 +02:00
|
|
|
|
2005-03-23 18:00:15 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
|
|
#define DEMUX_INDEX_SIZE_MAX (100000)
|
|
|
|
static void demux_IndexInit( demux_index_t *p_idx )
|
|
|
|
{
|
|
|
|
p_idx->i_idx = 0;
|
|
|
|
p_idx->i_idx_max = 0;
|
|
|
|
p_idx->idx = NULL;
|
|
|
|
}
|
|
|
|
static void demux_IndexClean( demux_index_t *p_idx )
|
|
|
|
{
|
2008-03-14 00:24:00 +01:00
|
|
|
free( p_idx->idx );
|
|
|
|
p_idx->idx = NULL;
|
2005-03-23 18:00:15 +01:00
|
|
|
}
|
|
|
|
static void demux_IndexAppend( demux_index_t *p_idx,
|
|
|
|
int64_t i_time, int64_t i_offset )
|
|
|
|
{
|
|
|
|
/* Be sure to append new entry (we don't insert point) */
|
|
|
|
if( p_idx->i_idx > 0 && p_idx->idx[p_idx->i_idx-1].i_time >= i_time )
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* */
|
|
|
|
if( p_idx->i_idx >= p_idx->i_idx_max )
|
|
|
|
{
|
|
|
|
if( p_idx->i_idx >= DEMUX_INDEX_SIZE_MAX )
|
|
|
|
{
|
|
|
|
/* Avoid too big index */
|
|
|
|
const int64_t i_length = p_idx->idx[p_idx->i_idx-1].i_time -
|
|
|
|
p_idx->idx[0].i_time;
|
|
|
|
const int i_count = DEMUX_INDEX_SIZE_MAX/2;
|
|
|
|
int i, j;
|
|
|
|
|
|
|
|
/* We try to reduce the resolution of the index by a factor 2 */
|
|
|
|
for( i = 1, j = 1; i < p_idx->i_idx; i++ )
|
|
|
|
{
|
|
|
|
if( p_idx->idx[i].i_time < j * i_length / i_count )
|
|
|
|
continue;
|
|
|
|
|
|
|
|
p_idx->idx[j++] = p_idx->idx[i];
|
|
|
|
}
|
|
|
|
p_idx->i_idx = j;
|
|
|
|
|
|
|
|
if( p_idx->i_idx > 3 * DEMUX_INDEX_SIZE_MAX / 4 )
|
|
|
|
{
|
|
|
|
/* We haven't created enough space
|
|
|
|
* (This method won't create a good index but work for sure) */
|
|
|
|
for( i = 0; i < p_idx->i_idx/2; i++ )
|
|
|
|
p_idx->idx[i] = p_idx->idx[2*i];
|
|
|
|
p_idx->i_idx /= 2;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
p_idx->i_idx_max += 1000;
|
2009-12-06 09:54:28 +01:00
|
|
|
p_idx->idx = xrealloc( p_idx->idx,
|
2009-12-05 15:24:19 +01:00
|
|
|
p_idx->i_idx_max*sizeof(demux_index_entry_t));
|
2005-03-23 18:00:15 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* */
|
|
|
|
p_idx->idx[p_idx->i_idx].i_time = i_time;
|
|
|
|
p_idx->idx[p_idx->i_idx].i_offset = i_offset;
|
|
|
|
|
|
|
|
p_idx->i_idx++;
|
|
|
|
}
|
|
|
|
static int64_t demux_IndexConvertTime( demux_index_t *p_idx, int64_t i_time )
|
|
|
|
{
|
|
|
|
int i_min = 0;
|
|
|
|
int i_max = p_idx->i_idx-1;
|
|
|
|
|
|
|
|
/* Empty index */
|
|
|
|
if( p_idx->i_idx <= 0 )
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
/* Special border case */
|
|
|
|
if( i_time <= p_idx->idx[0].i_time )
|
|
|
|
return p_idx->idx[0].i_offset;
|
|
|
|
if( i_time >= p_idx->idx[i_max].i_time )
|
|
|
|
return p_idx->idx[i_max].i_offset;
|
|
|
|
|
|
|
|
/* Dicho */
|
|
|
|
for( ;; )
|
|
|
|
{
|
|
|
|
int i_med;
|
|
|
|
|
|
|
|
if( i_max - i_min <= 1 )
|
|
|
|
break;
|
|
|
|
|
|
|
|
i_med = (i_min+i_max)/2;
|
|
|
|
if( p_idx->idx[i_med].i_time < i_time )
|
|
|
|
i_min = i_med;
|
|
|
|
else if( p_idx->idx[i_med].i_time > i_time )
|
|
|
|
i_max = i_med;
|
|
|
|
else
|
|
|
|
return p_idx->idx[i_med].i_offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* return nearest in time */
|
|
|
|
if( i_time - p_idx->idx[i_min].i_time < p_idx->idx[i_max].i_time - i_time )
|
|
|
|
return p_idx->idx[i_min].i_offset;
|
|
|
|
else
|
|
|
|
return p_idx->idx[i_max].i_offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static int64_t demux_IndexFindOffset( demux_index_t *p_idx, int64_t i_offset )
|
|
|
|
{
|
|
|
|
int i_min = 0;
|
|
|
|
int i_max = p_idx->i_idx-1;
|
|
|
|
|
|
|
|
/* Empty index */
|
|
|
|
if( p_idx->i_idx <= 0 )
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
/* Special border case */
|
|
|
|
if( i_offset <= p_idx->idx[0].i_offset )
|
|
|
|
return p_idx->idx[0].i_offset;
|
|
|
|
if( i_offset == p_idx->idx[i_max].i_offset )
|
|
|
|
return p_idx->idx[i_max].i_offset;
|
|
|
|
if( i_offset > p_idx->idx[i_max].i_offset )
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
/* Dicho */
|
|
|
|
for( ;; )
|
|
|
|
{
|
|
|
|
int i_med;
|
|
|
|
|
|
|
|
if( i_max - i_min <= 1 )
|
|
|
|
break;
|
|
|
|
|
|
|
|
i_med = (i_min+i_max)/2;
|
|
|
|
if( p_idx->idx[i_med].i_offset < i_offset )
|
|
|
|
i_min = i_med;
|
|
|
|
else if( p_idx->idx[i_med].i_offset > i_offset )
|
|
|
|
i_max = i_med;
|
|
|
|
else
|
|
|
|
return p_idx->idx[i_med].i_offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* return nearest */
|
|
|
|
if( i_offset - p_idx->idx[i_min].i_offset < p_idx->idx[i_max].i_offset - i_offset )
|
|
|
|
return p_idx->idx[i_min].i_offset;
|
|
|
|
else
|
|
|
|
return p_idx->idx[i_max].i_offset;
|
|
|
|
}
|
2008-09-01 00:44:51 +02:00
|
|
|
|