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vlc/src/input/input_file.c

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/*****************************************************************************
* input_file.c: functions to read from a file
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
*
* Authors:
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include "defs.h"
#include <stdio.h>
#include <unistd.h> /* close() */
#include <sys/types.h> /* on BSD, uio.h needs types.h */
#include <sys/uio.h> /* "input.h" */
#include <sys/stat.h> /* fstat, off_t ... */
#include <netinet/in.h> /* ntohl() */
#include <fcntl.h> /* open() */
#include <malloc.h> /* malloc, read ... */
#include <string.h>
#include "config.h"
#include "common.h"
#include "threads.h"
#include "mtime.h"
#include "intf_msg.h"
#include "input.h"
#include "input_file.h"
#define BUF_SIZE (797*3)
#define PS_METHOD 1
#define TS_METHOD 2
#define TS_PACKET_SIZE 188
#define TS_IN_UDP 7
#define PS_BUFFER_SIZE 16384
#define NO_PES 0
#define AUDIO_PES 1
#define VIDEO_PES 2
#define AC3_PES 3
#define SUBTITLE_PES 4
#define PRIVATE_PES 5
#define UNKNOWN_PES 12
#define PCR_PID 0x20 /* 0x20 == first video stream
* 0x40 == first audio stream */
typedef u8 file_ts_packet[TS_PACKET_SIZE];
typedef file_ts_packet udp_packet[TS_IN_UDP];
typedef struct synchro_struct
{
mtime_t delta_clock;
mtime_t slope;
mtime_t last_pcr_time;
file_ts_packet *last_pcr;
} synchro_t;
typedef struct in_data_s
{
int start, end;
vlc_mutex_t lock;
vlc_cond_t notfull;
vlc_cond_t notempty;
udp_packet buf[BUF_SIZE+1];
} in_data_t;
typedef struct own_pcr_s
{
int start, end;
vlc_mutex_t lock;
file_ts_packet *buf[(BUF_SIZE+1)*TS_IN_UDP+1];
} own_pcr_t;
typedef struct options_s
{
unsigned int pcr_pid;
u8 i_file_type;
int in;
} options_t;
typedef struct s_ps
{
unsigned int pat_counter;
unsigned int pmt_counter;
/*
* 16 audio mpeg streams
* 16 audio AV3 streams
* 16 video mpeg streams
* 32 subtitle streams
*/
unsigned int media_counter[0x100];
unsigned int association_table[0x100];
unsigned int found_streams;
unsigned int found_pts;
unsigned int ts_to_write;
unsigned int ts_written;
unsigned int sent_ts;
unsigned char *ps_data;
unsigned char *ps_end;
unsigned char *ps_buffer;
unsigned int pes_id;
unsigned int private_id;
unsigned int has_pts;
unsigned int pcr_pid;
unsigned int pes_type;
unsigned int pes_size;
unsigned int to_skip;
unsigned int offset;
} ps_t;
typedef struct input_file_s
{
boolean_t b_die; /* b_die flag for the disk thread */
vlc_thread_t disk_thread;
synchro_t synchro;
ps_t ps;
in_data_t in_data;
options_t options;
own_pcr_t own_pcr;
} input_file_t;
/* local prototypes */
void ps_fill( input_file_t * p_if, boolean_t wait );
ssize_t safe_read(int fd, unsigned char *buf, int count);
void input_DiskThread( input_file_t * p_if );
int init_synchro( input_file_t * p_if );
input_file_t input_file;
/******************************************************************************
* ConvertPCRTime : extracts and converts the PCR time in microseconds
******************************************************************************/
s64 ConvertPCRTime(file_ts_packet *pcr_buff)
{
return( (((((s64)U32_AT(((u8*)pcr_buff)+6)) << 1) | (((u8*)pcr_buff)[10] >> 7)) * 300) / 27 );
}
/******************************************************************************
* wait_a_moment : Compute how long we must wait before sending a TS packet
******************************************************************************/
static void wait_a_moment( input_file_t * p_if, file_ts_packet *ts)
{
synchro_t * p_synchro = &input_file.synchro;
static int retard_count = 0;
static s64 wait_max = 0;
s64 sendtime; /* the date at which the TS packet should be sent */
s64 wait;
sendtime = p_synchro->last_pcr_time + p_synchro->delta_clock +
p_synchro->slope * ((ts - p_synchro->last_pcr + (BUF_SIZE+1)*TS_IN_UDP) % ((BUF_SIZE+1)*TS_IN_UDP));
wait = sendtime - mdate();
//fprintf(stderr,"last PCR Time : %Ld\n", p_synchro->last_pcr_time );
if( wait > 0 )
{
retard_count = 0;
if(wait > 100000)
{
fprintf( stderr, "Warning : wait time may be too long : %Ld\n", wait );
return;
}
msleep( wait );
}
else
{
if( wait < wait_max )
{
wait_max = wait;
}
retard_count++;
if( retard_count == 16 )
{
retard_count = 0;
//fprintf( stderr, "delay : %Ldms, max delay : %Ldms\n", -wait/1000, -wait_max/1000 );
fflush(stdout);
}
}
}
/******************************************************************************
* adjust : Adjust the encoder clock & remove the PCR from own_pcr
******************************************************************************/
static void adjust( input_file_t * p_if, file_ts_packet *ts )
{
synchro_t * p_synchro = &p_if->synchro;
own_pcr_t * p_own_pcr = &p_if->own_pcr;
file_ts_packet *next_pcr;
int no_discontinuity = 1;
if( ((u8*)ts)[5] & 0x80 )
{
/* There is a discontinuity - I recalculate the delta */
p_synchro->delta_clock = mdate() - ConvertPCRTime(ts);
intf_DbgMsg( "input warning: clock discontinuity\n" );
no_discontinuity = 0;
}
else
{
p_synchro->last_pcr = ts;
p_synchro->last_pcr_time = ConvertPCRTime( ts );
}
vlc_mutex_lock(&p_own_pcr->lock);
p_own_pcr->start++;
p_own_pcr->start %= (BUF_SIZE+1)*TS_IN_UDP+1;
/* If we have 2 consecutiv PCR, we can reevaluate slope */
if( (p_own_pcr->start != p_own_pcr->end) &&
no_discontinuity &&
!((((u8*) next_pcr = p_own_pcr->buf[p_own_pcr->start]))[5] & 0x80))
{
s64 current_pcr_time = ConvertPCRTime(ts);
s64 next_pcr_time = ConvertPCRTime(next_pcr);
if( (next_pcr_time - current_pcr_time < 0) || (next_pcr_time - current_pcr_time > 700000))
{
fprintf( stderr, "Warning: possible discontinuity\n" );
p_synchro->delta_clock = mdate() - next_pcr_time;
}
else
{
//fprintf(stderr,"next - current : %Ld\n", next_pcr_time - current_pcr_time);
p_synchro->slope = (next_pcr_time - current_pcr_time) /
((next_pcr - ts + (BUF_SIZE+1)*TS_IN_UDP) % ((BUF_SIZE+1)*TS_IN_UDP));
//fprintf(stderr,"slope : %Ld\n", p_synchro->slope);
}
}
vlc_mutex_unlock(&p_own_pcr->lock);
}
/******************************************************************************
* safe_read : Buffered reading method
******************************************************************************/
ssize_t safe_read(int fd, unsigned char *buf, int count)
{
int ret, cnt=0;
while(cnt < count)
{
ret = read(fd, buf+cnt, count-cnt);
if(ret < 0)
return ret;
if(ret == 0)
break;
cnt += ret;
}
return cnt;
}
/******************************************************************************
* keep_pcr : Put a TS packet in the fifo if it owns a PCR
******************************************************************************/
int keep_pcr(int pcr_pid, file_ts_packet *ts)
{
own_pcr_t * p_own_pcr = &input_file.own_pcr;
#define p ((u8 *)ts)
if ((p[3] & 0x20) && p[4] && (p[5] & 0x10)
&& ((((p[1]<<8)+p[2]) & 0x1FFF) == pcr_pid))
{
/* adaptation_field_control is set, adaptation_field_lenght is not 0,
* PCR_flag is set, pid == pcr_pid */
vlc_mutex_lock(&p_own_pcr->lock);
p_own_pcr->buf[p_own_pcr->end++] = ts;
p_own_pcr->end %= (BUF_SIZE+1)*TS_IN_UDP+1;
vlc_mutex_unlock(&p_own_pcr->lock);
return 1;
}
else
return 0;
#undef p
}
/******************************************************************************
* get_pid : gets a pid from a PES type
******************************************************************************/
int get_pid (ps_t *p_ps)
{
int i, tofind, delta;
switch( p_ps->pes_type )
{
case VIDEO_PES:
delta = 0x20;
tofind = p_ps->pes_id;
break;
case AUDIO_PES:
delta = 0x40;
tofind = p_ps->pes_id;
break;
case SUBTITLE_PES:
delta = 0x60;
tofind = p_ps->private_id;
break;
case AC3_PES:
delta = 0x80;
tofind = p_ps->private_id;
break;
default:
return(-1);
}
/* look in the table if we can find one */
for ( i=delta; i < delta + 0x20; i++ )
{
if ( p_ps->association_table[i] == tofind )
return (i);
if( !p_ps->association_table[i] )
break;
}
/* we must allocate a new entry */
if (i == delta + 0x20)
return(-1);
p_ps->association_table[i] = tofind;
p_ps->media_counter[i] = 0;
fprintf( stderr, "allocated new PID 0x%.2x to stream ID 0x%.2x\n", i, tofind );
return ( i );
}
/******************************************************************************
* write_media_ts : writes a ts packet from a ps stream
******************************************************************************/
void write_media_ts(ps_t *ps, unsigned char *ts, unsigned int pid)
{
int i,j;
s64 clock;
long int extclock;
/* if offset == 0, it means we haven't examined the PS yet */
if (ps->offset == 0)
{
if (ps->pes_size < 184) {
//fprintf(stderr,"[WARNING: small PES]\n");
ts[0] = 0x47; /* sync_byte */
ts[1] = 0x40; /* payload_unit_start_indicator si d�but de PES */
ts[2] = pid;
ts[3] = 0x30 + (ps->media_counter[pid] & 0x0f);
ts[4] = 184 - ps->pes_size - 1;
ts[5] = 0x00;
for (i=6 ; i < 188 - ps->pes_size ; i++) ts[i]=0xFF; /* facultatif ? */
memcpy(ts + 188 - ps->pes_size, ps->ps_data, ps->pes_size);
/* this PS is finished, next time we'll pick a new one */
ps->pes_type = NO_PES;
ps->ps_data += ps->pes_size;
ps->offset += ps->pes_size;
//fprintf( stderr, "wrote %i final data (size was 0x%.2x)\n", ps->offset, ps->pes_size);
return;
}
}
/* now we still can have offset == 0, but size is initialized */
ts[0] = 0x47; /* sync_byte */
ts[1] = (ps->offset == 0) ? 0x40 : 0x00; /* payload_unit_start_indicator si d�but de PES */
ts[2] = pid;
//fprintf( stderr, "checking clock for %.2x while we have %.2x\n", ps->pcr_pid, pid );
//fprintf( stderr, "offset 0x%.2x, pts 0x%.2x, pid %i \n", ps->offset, ps->has_pts, pid );
if ( (ps->offset == 0) && (ps->has_pts == 0xc0) && (ps->pcr_pid == pid) )
{
ts[3] = 0x30 + (ps->media_counter[pid] & 0x0f);
ts[4] = 0x07; /* taille de l'adaptation field */
ts[5] = 0x50; /* rtfm */
/* on va lire le PTS */
clock = ( ((s64)(ps->ps_data[9] & 0x0E) << 29) |
(((s64)U16_AT(ps->ps_data + 10) << 14) - (1 << 14)) |
((s64)U16_AT(ps->ps_data + 12) >> 1) );
//fprintf( stderr, "clock is %lli\n", clock );
ps->has_pts = 0;
extclock = 0x000;
ts[6] = (clock & 0x1fe000000) >> 25; /* ---111111110000000000000000000000000 */
ts[7] = (clock & 0x001fe0000) >> 17; /* ---000000001111111100000000000000000 */
ts[8] = (clock & 0x00001fe00) >> 9; /* ---000000000000000011111111000000000 */
ts[9] = (clock & 0x0000001fe) >> 1; /* ---000000000000000000000000111111110 */
ts[10] = 0x7e + ((clock & 0x01) << 7) + ((extclock & 0x100) >> 8);
ts[11] = extclock & 0xff;
memcpy(ts + 4 + 8, ps->ps_data, 184 - 8);
ts[15] = 0xe0; /* FIXME : we don't know how to choose program yet */
ps->offset += 184 - 8;
ps->ps_data += 184 - 8;
}
else if (ps->offset <= ps->pes_size - 184)
{
ts[3] = 0x10 + (ps->media_counter[pid] & 0x0f);
memcpy(ts + 4, ps->ps_data, 184);
ps->offset += 184;
ps->ps_data += 184;
}
else
{
j = ps->pes_size - ps->offset;
ts[3] = 0x30 + (ps->media_counter[pid] & 0x0f);
ts[4] = 184 - j - 1;
ts[5] = 0x00;
for (i=6 ; i < 188 - j ; i++) ts[i]=0xFF; /* facultatif ? */
memcpy(ts + 4 + 184 - j, ps->ps_data, j);
ps->offset += j; /* offset = size */
ps->ps_data += j; /* offset = size */
/* the PES is finished */
ps->pes_type = NO_PES;
ps->sent_ts++;
//fprintf( stderr, "wrote 0x%.2x data (size was 0x%.2x)\n", ps->offset, ps->pes_size);
}
//fprintf(stderr, "[PES size: %i]\n", ps->pes_size);
}
/******************************************************************************
* write_pat : writes a program association table
******************************************************************************/
void write_pat(ps_t *ps, unsigned char *ts)
{
int i;
//fprintf( stderr, "wrote a PAT\n");
ts[0] = 0x47; /* sync_byte */
ts[1] = 0x40;
ts[2] = 0x00; /* PID = 0x0000 */
ts[3] = 0x10 + (ps->pat_counter & 0x0f);
ts[4] = ts[5] = 0x00;
ts[6] = 0xb0; /* */
ts[7] = 0x11; /* section_length = 0x011 */
ts[8] = 0x00;
ts[9] = 0xb0; /* TS id = 0x00b0 */
ts[10] = 0xc1;
/* section # and last section # */
ts[11] = ts[12] = 0x00;
/* Network PID (useless) */
ts[13] = ts[14] = 0x00; ts[15] = 0xe0; ts[16] = 0x10;
/* Program Map PID */
ts[17] = 0x03; ts[18] = 0xe8; ts[19] = 0xe0; ts[20] = 0x64;
/* CRC */
ts[21] = 0x4d; ts[22] = 0x6a; ts[23] = 0x8b; ts[24] = 0x0f;
for (i=25 ; i < 188 ; i++) ts[i]=0xFF; /* facultatif ? */
ps->sent_ts++;
}
/******************************************************************************
* write_pmt : writes a program map table
******************************************************************************/
void write_pmt(ps_t *ps, unsigned char *ts)
{
int i;
//fprintf( stderr, "wrote a PMT\n");
ts[0] = 0x47; /* sync_byte */
ts[1] = 0x40;
ts[2] = 0x0064; /* PID = 0x0064 */
ts[3] = 0x10 + (ps->pmt_counter & 0x0f);
ts[4] = 0x00;
ts[5] = 0x02;
ts[6] = 0xb0; /* */
ts[7] = 0x34; /* section_length = 0x034 */
ts[8] = 0x03;
ts[9] = 0xe8; /* prog number */
ts[10] = 0xc1;
/* section # and last section # */
ts[11] = ts[12] = 0x00;
/* PCR PID */
ts[13] = 0xe0;
ts[14] = 0x20;
/* program_info_length == 0 */
ts[15] = 0xf0; ts[16] = 0x00;
/* Program Map / Video PID */
ts[17] = 0x02; /* stream type = video */
ts[18] = 0xe0; ts[19] = 0x20;
ts[20] = 0xf0; ts[21] = 0x09; /* es info length */
/* useless info */
ts[22] = 0x07; ts[23] = 0x04; ts[24] = 0x08; ts[25] = 0x80; ts[26] = 0x24;
ts[27] = 0x02; ts[28] = 0x11; ts[29] = 0x01; ts[30] = 0xfe;
/* Audio PID */
ts[31] = 0x88; /* stream type = audio */ /* FIXME : was 0x04 */
ts[32] = 0xe0; ts[33] = 0x40;
ts[34] = 0xf0; ts[35] = 0x00; /* es info length */
/* reserved PID */
#if 0
ts[36] = 0x82; /* stream type = private */
ts[37] = 0xe0; ts[38] = 0x60; /* subtitles */
#else
ts[36] = 0x81; /* stream type = private */
ts[37] = 0xe0; ts[38] = 0x80; /* ac3 audio */
#endif
ts[39] = 0xf0; ts[40] = 0x0f; /* es info length */
/* useless info */
ts[41] = 0x90; ts[42] = 0x01; ts[43] = 0x85; ts[44] = 0x89; ts[45] = 0x04;
ts[46] = 0x54; ts[47] = 0x53; ts[48] = 0x49; ts[49] = 0x00; ts[50] = 0x0f;
ts[51] = 0x04; ts[52] = 0x00; ts[53] = 0x00; ts[54] = 0x00; ts[55] = 0x10;
/* CRC */
ts[56] = 0x96; ts[57] = 0x70; ts[58] = 0x0b; ts[59] = 0x7c; /* for video pts */
//ts[56] = 0xa1; ts[57] = 0x7c; ts[58] = 0xd8; ts[59] = 0xaa; /* for audio pts */
for (i=60 ; i < 188 ; i++) ts[i]=0xFF; /* facultatif ? */
ps->sent_ts++;
}
/******************************************************************************
* ps_thread
******************************************************************************
* We use threading to allow cool non-blocking read from the disk. This
* implicit thread is the disk (producer) thread, it reads packets from
* the PS file on the disk, and stores them in a FIFO.
******************************************************************************/
void ps_thread( input_file_t * p_if )
{
int i;
ps_t * p_ps = &p_if->ps;
own_pcr_t * p_own_pcr = &p_if->own_pcr;
in_data_t * p_in_data = &p_if->in_data;
/* Initialize the structures */
p_own_pcr->start = p_own_pcr->end = 0; /* empty FIFO */
vlc_mutex_init( &p_own_pcr->lock );
p_in_data->start = p_in_data->end = 0; /* empty FIFO */
vlc_mutex_init( &p_in_data->lock );
vlc_cond_init( &p_in_data->notfull );
vlc_cond_init( &p_in_data->notempty );
p_ps->pes_type = NO_PES;
p_ps->pes_id = 0;
p_ps->private_id = 0;
p_ps->pes_size = 0;
p_ps->to_skip = 0;
p_ps->pmt_counter = 0;
p_ps->pat_counter = 0;
for( i=0; i<256; i++ )
p_ps->association_table[i] = 0;
p_ps->offset = 0;
p_ps->found_pts = 0;
p_ps->found_streams = 0;
p_ps->pcr_pid = p_if->options.pcr_pid;
p_ps->ps_buffer = malloc(PS_BUFFER_SIZE);
/* those 2 addresses are initialized so that a new packet is read */
p_ps->ps_data = p_ps->ps_buffer + PS_BUFFER_SIZE - 1;
/* fix the first byte stuff */
p_ps->ps_data[0] = 0x00;
p_ps->ps_end = p_ps->ps_buffer + PS_BUFFER_SIZE;
/* Fill the fifo until it is full */
ps_fill( p_if, 0 );
/* Launch the thread which fills the fifo */
vlc_thread_create( &p_if->disk_thread, "disk thread", (vlc_thread_func_t)input_DiskThread, p_if );
/* Init the synchronization XXX add error detection !!! */
init_synchro( p_if );
}
/******************************************************************************
* ps_read : ps reading method
******************************************************************************/
ssize_t ps_read (int fd, ps_t * p_ps, void *ts)
{
int pid, readbytes = 0;
int datasize;
p_ps->ts_written = 0;
while(p_ps->ts_to_write)
{
/* if there's not enough data to send */
if((datasize = p_ps->ps_end - p_ps->ps_data) <= TS_PACKET_SIZE)
{
/* copy the remaining bits at the beginning of the PS buffer */
memmove ( p_ps->ps_buffer, p_ps->ps_data, datasize);
/* read some bytes */
readbytes = safe_read(fd, p_ps->ps_buffer + datasize, PS_BUFFER_SIZE - datasize);
if(readbytes == 0)
{
fprintf (stderr,"ps READ ERROR\n");
return -1;
}
p_ps->ps_data = p_ps->ps_buffer;
p_ps->ps_end = p_ps->ps_data + datasize + readbytes;
}
//printf("offset is %x, pes total size is %x, to skip is %x\n", p_ps->offset, p_ps->pes_size, p_ps->to_skip );
if( p_ps->to_skip == 0 && p_ps->offset == p_ps->pes_size )
{
if( p_ps->ps_data[0] || p_ps->ps_data[1] || (p_ps->ps_data[2] != 0x01) )
{
fprintf (stderr,"Error: not a startcode (0x%.2x%.2x%.2x instead of 0x000001)\n", p_ps->ps_data[0], p_ps->ps_data[1], p_ps->ps_data[2] );
return -1;
}
p_ps->pes_type = NO_PES;
p_ps->offset = 0;
p_ps->pes_size = (p_ps->ps_data[4] << 8) + p_ps->ps_data[5] + 6;
p_ps->has_pts = p_ps->ps_data[7] & 0xc0;
}
/* if the actual data we have in pes_data is not a PES, then
* we read the next one. */
if( (p_ps->pes_type == NO_PES) && !p_ps->to_skip )
{
p_ps->pes_id = p_ps->ps_data[3];
if (p_ps->pes_id == 0xbd)
{
p_ps->private_id = p_ps->ps_data[ 9 + p_ps->ps_data[8] ];
if ((p_ps->private_id & 0xf0) == 0x80)
{
/* flux audio ac3 */
p_ps->pes_type = AC3_PES;
}
else if ((p_ps->private_id & 0xf0) == 0x20)
{
/* subtitles */
p_ps->pes_type = SUBTITLE_PES;
}
else
{
/* unknown private data */
p_ps->pes_type = PRIVATE_PES;
}
}
else if ((p_ps->pes_id & 0xe0) == 0xc0)
{
/* flux audio */
p_ps->pes_type = AUDIO_PES;
//write (1, p_ps->ps_data + 9 + p_ps->ps_data[8], 2048 - (9 + p_ps->ps_data[8]));
}
else if ((p_ps->pes_id & 0xf0) == 0xe0)
{
/* flux video */
p_ps->pes_type = VIDEO_PES;
}
else if (p_ps->pes_id == 0xba)
{
p_ps->pes_type = NO_PES;
p_ps->pes_size = 14; /* 8 extra characters after 0x000001ba**** */
p_ps->to_skip = 14;
}
else
{
p_ps->pes_type = UNKNOWN_PES;
p_ps->to_skip = p_ps->pes_size;
}
}
if( p_ps->to_skip )
{
if( p_ps->to_skip < TS_PACKET_SIZE )
{
p_ps->ps_data += p_ps->to_skip;
p_ps->offset += p_ps->to_skip;
p_ps->to_skip = 0;
}
else
{
p_ps->ps_data += TS_PACKET_SIZE;
p_ps->offset += TS_PACKET_SIZE;
p_ps->to_skip -= TS_PACKET_SIZE;
}
}
/* now that we know what we have, we can either
* write this packet's data in the buffer, skip it,
* or write a PMT or PAT table and wait for the next
* turn before writing the packet. */
switch (p_ps->sent_ts & 0xff)
{
case 0x80:
write_pmt(p_ps,ts);
p_ps->pmt_counter++;
p_ps->ts_to_write--; p_ps->ts_written++; ts+=188;
break;
case 0x00:
write_pat(p_ps,ts);
p_ps->pat_counter++;
p_ps->ts_to_write--; p_ps->ts_written++; ts+=188;
break;
}
/* if there's still no found PCR_PID, and no PTS in this PES, we trash it */
if (!p_ps->found_pts)
{
if (p_ps->has_pts)
{
fprintf(stderr, "found a PTS, at last ...\n");
p_ps->found_pts = 1;
}
else
p_ps->pes_type = NO_PES;
}
if (p_ps->ts_to_write)
{
switch(p_ps->pes_type)
{
case VIDEO_PES:
case AUDIO_PES:
case SUBTITLE_PES:
case AC3_PES:
pid = get_pid (p_ps);
write_media_ts(p_ps, ts, pid);
p_ps->ts_to_write--; p_ps->ts_written++; ts+=188;
p_ps->media_counter[pid]++;
break;
case UNKNOWN_PES:
default:
p_ps->pes_type = NO_PES;
break;
}
}
}
//p_ps->ps_data += TS_PACKET_SIZE;
return p_ps->ts_written;
}
/******************************************************************************
* ps_fill : Fill the data buffer with TS created from a PS file
******************************************************************************/
void ps_fill( input_file_t * p_if, boolean_t wait )
{
in_data_t * p_in_data = &p_if->in_data;
ps_t * p_ps = &p_if->ps;
int fd = p_if->options.in;
int i, how_many;
int pcr_flag;
file_ts_packet *ts;
/* How many TS packet for the next UDP packet */
how_many = TS_IN_UDP;
pcr_flag = 0;
/* for every single TS packet */
while( !p_if->b_die )
{
/* wait until we have one free item to store the UDP packet read */
vlc_mutex_lock(&p_in_data->lock);
while((p_in_data->end+BUF_SIZE+1-p_in_data->start)%(BUF_SIZE+1) == BUF_SIZE )
{
/* The buffer is full */
if(wait)
{
vlc_cond_wait(&p_in_data->notfull, &p_in_data->lock);
if( p_if->b_die )
return;
}
else
{
vlc_mutex_unlock(&p_in_data->lock);
if (!pcr_flag)
{
intf_ErrMsg( "input error: bad PCR PID\n" );
}
return;
}
}
vlc_mutex_unlock(&p_in_data->lock);
/* read a whole UDP packet from the file */
p_ps->ts_to_write = how_many;
if(ps_read(fd, p_ps, ts = (file_ts_packet *)(p_in_data->buf + p_in_data->end)) != how_many)
{
msleep( 50000 ); /* XXX we need an INPUT_IDLE */
intf_ErrMsg( "input error: read() error\n" );
}
/* Scan to mark TS packets containing a PCR */
for(i=0; i<how_many; i++, ts++)
{
pcr_flag |= keep_pcr(p_ps->pcr_pid, ts);
}
vlc_mutex_lock(&p_in_data->lock);
p_in_data->end++;
p_in_data->end %= BUF_SIZE+1;
vlc_cond_signal(&p_in_data->notempty);
vlc_mutex_unlock(&p_in_data->lock);
}
}
int init_synchro( input_file_t * p_if )
{
int i, pcr_count;
int howmany = TS_IN_UDP;
file_ts_packet * ts;
synchro_t * p_synchro = &p_if->synchro;
in_data_t * p_in_data = &p_if->in_data;
own_pcr_t * p_own_pcr = &p_if->own_pcr;
p_synchro->slope = 0;
pcr_count = 0;
/*
* Initialisation of the synchro mecanism : wait for 1 PCR
* to evaluate delta_clock
*/
while( 1 )
{
vlc_mutex_lock( &p_in_data->lock );
while( p_in_data->end == p_in_data->start )
{
vlc_cond_wait(&p_in_data->notempty, &p_in_data->lock);
}
/*
if( p_in_data->end == p_in_data->start )
{
intf_ErrMsg( "input error: init_synchro error, not enough PCR found\n" );
return( -1 );
}
*/
vlc_mutex_unlock( &p_in_data->lock );
ts = (file_ts_packet*)(p_in_data->buf + p_in_data->start);
for( i=0 ; i < howmany ; i++, ts++ )
{
if( ts == p_own_pcr->buf[p_own_pcr->start] && !(((u8*)ts)[5] & 0x80) )
{
p_synchro->last_pcr = ts;
p_synchro->last_pcr_time = ConvertPCRTime( ts );
p_synchro->delta_clock = mdate() - ConvertPCRTime(ts);
adjust( p_if, ts );
pcr_count++;
}
}
vlc_mutex_lock( &p_in_data->lock );
p_in_data->start++;
p_in_data->start %= BUF_SIZE + 1;
vlc_cond_signal( &p_in_data->notfull );
vlc_mutex_unlock( &p_in_data->lock );
if(pcr_count)
break;
}
return( 0 );
}
/*****************************************************************************
* input_FileOpen : open a file descriptor
*****************************************************************************/
void input_DiskThread( input_file_t * p_if )
{
ps_fill( p_if, 1 );
vlc_thread_exit();
}
/*****************************************************************************
* input_FileOpen : open a file descriptor
*****************************************************************************/
int input_FileOpen( input_thread_t *p_input )
{
options_t * p_options = &input_file.options;
p_options->in = open( p_input->psz_source, O_RDONLY );
if( p_options->in < 0 )
{
intf_ErrMsg( "input error: cannot open the file %s", p_input->psz_source );
}
input_file.b_die = 0;
read( p_options->in, &p_options->i_file_type, 1 );
switch( p_options->i_file_type )
{
case 0x00:
p_options->pcr_pid = PCR_PID;
ps_thread( &input_file );
break;
case 0x47:
intf_ErrMsg( "input error: ts files are not currently supported\n" );
return( 1 );
default:
intf_ErrMsg( "input error: cannot determine stream type\n" );
return( 1 );
}
return( 0 );
}
/*****************************************************************************
* input_FileRead : read from a file
*****************************************************************************/
int input_FileRead( input_thread_t *p_input, const struct iovec *p_vector,
size_t i_count )
{
in_data_t * p_in_data = &input_file.in_data;
synchro_t * p_synchro = &input_file.synchro;
own_pcr_t * p_own_pcr = &input_file.own_pcr;
int i, howmany;
file_ts_packet * ts;
/* XXX XXX XXX
* End condition not verified, should put a flag in ps_fill
*/
howmany = TS_IN_UDP;
//fprintf( stderr, "XXX icount = %d\n", (int)i_count );
vlc_mutex_lock( &p_in_data->lock );
while( p_in_data->end == p_in_data->start )
{
if( !input_file.b_die )
vlc_cond_wait( &p_in_data->notempty, &p_in_data->lock );
}
vlc_mutex_unlock( &p_in_data->lock );
ts = (file_ts_packet*)(p_in_data->buf + p_in_data->start);
for( i=0 ; i < howmany ; i++, ts++ )
{
if( p_synchro->slope && (i == howmany-1) )
{
wait_a_moment( &input_file, ts );
}
if( ts == p_own_pcr->buf[p_own_pcr->start] )
{
/* the TS packet contains a PCR, so we try to adjust the clock */
adjust( &input_file, ts );
}
}
for( i=0 ; i<howmany ; i++ )
{
memcpy( p_vector[i].iov_base, (char*)(ts - howmany + i), p_vector[i].iov_len );
}
vlc_mutex_lock(&p_in_data->lock);
p_in_data->start++;
p_in_data->start %= BUF_SIZE + 1;
vlc_cond_signal(&p_in_data->notfull);
vlc_mutex_unlock(&p_in_data->lock);
return( 188*howmany );
}
/*****************************************************************************
* input_FileClose : close a file descriptor
*****************************************************************************/
void input_FileClose( input_thread_t *p_input )
{
input_file.b_die = 1;
vlc_cond_signal( &input_file.in_data.notfull );
vlc_thread_join( input_file.disk_thread );
close( input_file.options.in );
}