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vlc/modules/demux/nuv.c
Laurent Aimar 0e6740c576 Used VLC_TS_INVALID/0 in NUV demuxer.
2009-12-20 23:23:28 +01:00

1021 lines
31 KiB
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/*****************************************************************************
* nuv.c:
*****************************************************************************
* Copyright (C) 2005 the VideoLAN team
* $Id$
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Gertjan Van Droogenbroeck <gertjanvd _PLUS_ vlc _AT_ gmail _DOT_ com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_demux.h>
/* TODO:
* - test
*/
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
vlc_module_begin ()
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_DEMUX )
set_description( N_("Nuv demuxer") )
set_capability( "demux", 145 )
set_callbacks( Open, Close )
add_shortcut( "nuv" )
vlc_module_end ()
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Demux ( demux_t * );
static int Control( demux_t *, int, va_list );
/* */
typedef struct
{
int64_t i_time;
int64_t i_offset;
} demux_index_entry_t;
typedef struct
{
int i_idx;
int i_idx_max;
demux_index_entry_t *idx;
} demux_index_t;
static void demux_IndexInit( demux_index_t * );
static void demux_IndexClean( demux_index_t * );
static void demux_IndexAppend( demux_index_t *,
int64_t i_time, int64_t i_offset );
/* Convert a time into offset */
static int64_t demux_IndexConvertTime( demux_index_t *, int64_t i_time );
/* Find the nearest offset in the index */
static int64_t demux_IndexFindOffset( demux_index_t *, int64_t i_offset );
/* */
typedef struct
{
char id[12]; /* "NuppelVideo\0" or "MythTVVideo\0" */
char version[5]; /* "x.xx\0" */
int i_width;
int i_height;
int i_width_desired;
int i_height_desired;
char i_mode; /* P progressive, I interlaced */
double d_aspect; /* 1.0 squared pixel */
double d_fps;
int i_video_blocks; /* 0 no video, -1 unknown */
int i_audio_blocks;
int i_text_blocks;
int i_keyframe_distance;
} header_t;
#define NUV_FH_SIZE 12
typedef struct
{
char i_type; /* A: audio, V: video, S: sync; T: test
R: Seekpoint (string:RTjjjjjjjj)
D: Extra data for codec
X: extended data Q: seektable */
char i_compression; /* V: 0 uncompressed
1 RTJpeg
2 RTJpeg+lzo
N black frame
L copy last
A: 0 uncompressed (44100 1-bits, 2ch)
1 lzo
2 layer 2
3 layer 3
F flac
S shorten
N null frame loudless
L copy last
S: B audio and vdeo sync point
A audio sync info (timecode == effective
dsp frequency*100)
V next video sync (timecode == next video
frame num)
S audio,video,text correlation */
char i_keyframe; /* 0 keyframe, else no no key frame */
uint8_t i_filters; /* 0x01: gauss 5 pixel (8,2,2,2,2)/16
0x02: gauss 5 pixel (8,1,1,1,1)/12
0x04: cartoon filter */
int i_timecode; /* ms */
int i_length; /* V,A,T: length of following data
S: length of packet correl */
} frame_header_t;
typedef struct
{
int i_version;
vlc_fourcc_t i_video_fcc;
vlc_fourcc_t i_audio_fcc;
int i_audio_sample_rate;
int i_audio_bits_per_sample;
int i_audio_channels;
int i_audio_compression_ratio;
int i_audio_quality;
int i_rtjpeg_quality;
int i_rtjpeg_luma_filter;
int i_rtjpeg_chroma_filter;
int i_lavc_bitrate;
int i_lavc_qmin;
int i_lavc_qmax;
int i_lavc_maxqdiff;
int64_t i_seektable_offset;
int64_t i_keyframe_adjust_offset;
} extended_header_t;
struct demux_sys_t
{
header_t hdr;
extended_header_t exh;
int64_t i_pcr;
es_out_id_t *p_es_video;
int i_extra_f;
uint8_t *p_extra_f;
es_out_id_t *p_es_audio;
/* index */
demux_index_t idx;
bool b_index;
bool b_seekable;
/* frameheader buffer */
uint8_t fh_buffer[NUV_FH_SIZE];
int64_t i_total_frames;
int64_t i_total_length;
/* first frame position (used for calculating size without seektable) */
int i_first_frame_offset;
};
static int HeaderLoad( demux_t *, header_t *h );
static int FrameHeaderLoad( demux_t *, frame_header_t *h );
static int ExtendedHeaderLoad( demux_t *, extended_header_t *h );
static int SeekTableLoad( demux_t *, demux_sys_t * );
static int ControlSetPosition( demux_t *p_demux, int64_t i_pos, bool b_guess );
/*****************************************************************************
* Open: initializes ES structures
*****************************************************************************/
static int Open( vlc_object_t * p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
const uint8_t *p_peek;
frame_header_t fh;
bool b_extended;
/* Check id */
if( stream_Peek( p_demux->s, &p_peek, 12 ) != 12 ||
( strncmp( (char *)p_peek, "MythTVVideo", 11 ) &&
strncmp( (char *)p_peek, "NuppelVideo", 11 ) ) )
return VLC_EGENERIC;
p_sys = malloc( sizeof( demux_sys_t ) );
if( p_sys == NULL )
return VLC_ENOMEM;
memset( p_sys, 0, sizeof( demux_sys_t ) );
p_sys->p_es_video = NULL;
p_sys->p_es_audio = NULL;
p_sys->p_extra_f = NULL;
p_sys->i_pcr = -1;
p_sys->b_index = false;
p_sys->i_total_frames = -1;
p_sys->i_total_length = -1;
demux_IndexInit( &p_sys->idx );
p_demux->p_sys = p_sys;
/* Info about the stream */
stream_Control( p_demux->s, STREAM_CAN_SEEK, &p_sys->b_seekable );
#if 0
if( p_sys->b_seekable )
msg_Dbg( p_demux, "stream is seekable" );
else
msg_Dbg( p_demux, "stream is NOT seekable" );
#endif
if( HeaderLoad( p_demux, &p_sys->hdr ) )
goto error;
/* Load 'D' */
if( FrameHeaderLoad( p_demux, &fh ) || fh.i_type != 'D' )
goto error;
if( fh.i_length > 0 )
{
if( fh.i_compression == 'F' || fh.i_compression == 'R' )
{
/* ffmpeg extra data */
p_sys->i_extra_f = fh.i_length;
p_sys->p_extra_f = malloc( fh.i_length );
if( p_sys->p_extra_f == NULL || stream_Read( p_demux->s,
p_sys->p_extra_f, fh.i_length ) != fh.i_length )
goto error;
}
else
{
msg_Warn( p_demux, "unsupported 'D' frame (c=%c)", fh.i_compression );
if( stream_Read( p_demux->s, NULL, fh.i_length ) != fh.i_length )
goto error;
}
}
/* Check and load extented */
if( stream_Peek( p_demux->s, &p_peek, 1 ) != 1 )
goto error;
if( p_peek[0] == 'X' )
{
b_extended = true;
if( FrameHeaderLoad( p_demux, &fh ) )
goto error;
if( fh.i_length != 512 )
goto error;
if( ExtendedHeaderLoad( p_demux, &p_sys->exh ) )
goto error;
if( !p_sys->b_seekable )
msg_Warn( p_demux, "stream is not seekable, skipping seektable" );
else if( SeekTableLoad( p_demux, p_sys ) )
goto error;
}
else
{
b_extended = false;
/* 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;
fmt.video.i_sar_num = p_sys->hdr.d_aspect * fmt.video.i_height;
fmt.video.i_sar_den = fmt.video.i_width;
p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
}
if( p_sys->hdr.i_audio_blocks != 0 )
{
es_format_t fmt;
es_format_Init( &fmt, AUDIO_ES, VLC_CODEC_MPGA );
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)" );
}
p_sys->i_first_frame_offset = stream_Tell( p_demux->s );
/* 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" );
p_demux->p_sys = NULL;
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;
free( p_sys->p_extra_f );
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( ;; )
{
if( !vlc_object_alive (p_demux) )
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 */
if( fh.i_type != 'R' && fh.i_length > 0 )
{
if( stream_Read( p_demux->s, NULL, fh.i_length ) != fh.i_length )
return -1;
}
}
/* */
if( ( p_data = stream_Block( p_demux->s, fh.i_length ) ) == NULL )
return 0;
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;
/* only add keyframes to index */
if( !fh.i_keyframe && !p_sys->b_index )
demux_IndexAppend( &p_sys->idx,
p_data->i_dts - VLC_TS_0,
stream_Tell(p_demux->s) - NUV_FH_SIZE );
/* */
if( p_sys->i_pcr < 0 || p_sys->i_pcr < p_data->i_dts - VLC_TS_0 )
{
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 );
}
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 )
{
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' )
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 * );
if( p_sys->i_total_length > 0 && p_sys->i_pcr >= 0 )
{
*pf = (double)p_sys->i_pcr / (double)p_sys->i_total_length;
}
else
{
i64 = stream_Size( p_demux->s );
if( i64 > 0 )
{
const double f_current = stream_Tell( p_demux->s );
*pf = f_current / (double)i64;
}
else
{
*pf = 0.0;
}
}
return VLC_SUCCESS;
case DEMUX_SET_POSITION:
{
int64_t i_pos;
f = (double)va_arg( args, double );
p_sys->i_pcr = -1;
/* 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 );
/* 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 );
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 );
else
return VLC_EGENERIC;
}
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 );
p_sys->i_pcr = -1;
i_pos = demux_IndexConvertTime( &p_sys->idx, i64 );
if( i_pos < 0 )
return VLC_EGENERIC;
else
return ControlSetPosition( p_demux, i_pos, false );
}
case DEMUX_GET_LENGTH:
pi64 = (int64_t*)va_arg( args, int64_t * );
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;
case DEMUX_GET_FPS:
pf = (double*)va_arg( args, double * );
*pf = p_sys->hdr.d_fps;
return VLC_SUCCESS;
case DEMUX_GET_META:
default:
return VLC_EGENERIC;
}
}
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;
}
/*****************************************************************************
*
*****************************************************************************/
static inline void GetDoubleLE( double *pd, void *src )
{
/* FIXME works only if sizeof(double) == 8 */
#ifdef WORDS_BIGENDIAN
uint8_t *p = (uint8_t*)pd, *q = (uint8_t*)src;
int i;
for( i = 0; i < 8; i++ )
p[i] = q[7-i];
#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 )
{
uint8_t* buffer = p_demux->p_sys->fh_buffer;
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] );
h->i_seektable_offset = GetQWLE( &buffer[60] );
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"
"rtjpeg q=%d lf=%d lc=%d lavc br=%d qmin=%d qmax=%d maxqdiff=%d seekableoff=%"PRIi64" keyfao=%"PRIi64,
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,
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;
if( fh.i_type != 'Q' )
{
msg_Warn( p_demux, "invalid seektable, frame type=%c", fh.i_type );
stream_Seek( p_demux->s, i_original_pos );
return VLC_EGENERIC;
}
/* */
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;
/* Get keyframe adjust offsets */
int32_t i_kfa_elements;
uint8_t *p_kfa_table;
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 );
if( p_kfa_table == NULL )
{
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;
}
}
else
{
i_kfa_elements = 0;
}
if( i_kfa_elements > 0 )
msg_Warn( p_demux, "untested keyframe adjust support, upload samples" );
for( int32_t j = 0; j < i_seek_elements; j++)
{
#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]);
#endif
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;
return VLC_SUCCESS;
}
/*****************************************************************************/
#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 )
{
free( p_idx->idx );
p_idx->idx = NULL;
}
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;
p_idx->idx = xrealloc( p_idx->idx,
p_idx->i_idx_max*sizeof(demux_index_entry_t));
}
}
/* */
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;
}
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