Commit 3ca0203c authored by Laurent Aimar's avatar Laurent Aimar
Browse files

* v4l: used the same trick than vls to avoid too much resampling.

parent 469ac3a3
......@@ -2,7 +2,7 @@
* v4l.c : Video4Linux input module for vlc
*****************************************************************************
* Copyright (C) 2002 VideoLAN
* $Id: v4l.c,v 1.11 2003/05/03 01:52:43 fenrir Exp $
* $Id: v4l.c,v 1.12 2003/05/03 12:36:17 fenrir Exp $
*
* Author: Samuel Hocevar <sam@zoy.org>
*
......@@ -175,11 +175,21 @@ static void SetDWBE( uint8_t *p, uint32_t dw )
p[3] = (dw )&0xff;
}
static void SetQWBE( uint8_t *p, uint64_t qw )
{
SetDWBE( p, (qw >> 32)&0xffffffff );
SetDWBE( &p[4], qw&0xffffffff);
}
static uint32_t GetDWBE( uint8_t *p_buff )
{
return( ( p_buff[0] << 24 ) + ( p_buff[1] << 16 ) +
( p_buff[2] << 8 ) + p_buff[3] );
}
static uint64_t GetQWBE( uint8_t *p )
{
return( ( (uint64_t)GetDWBE( p ) << 32) | (uint64_t)GetDWBE( &p[4] ) );
}
/*****************************************************************************
* Open: open device:
......@@ -920,10 +930,13 @@ static void AccessClose( vlc_object_t *p_this )
#ifdef _V4L_AUDIO_
static int GrabAudio( input_thread_t * p_input,
uint8_t **pp_data,
int *pi_data )
int *pi_data,
mtime_t *pi_pts )
{
access_sys_t *p_sys = p_input->p_access_data;
struct audio_buf_info buf_info;
int i_read;
int i_correct;
i_read = read( p_sys->fd_audio, p_sys->p_audio_frame,
p_sys->i_audio_frame_size_allocated );
......@@ -935,15 +948,26 @@ static int GrabAudio( input_thread_t * p_input,
p_sys->i_audio_frame_size = i_read;
/* from vls : correct the date because of kernel buffering */
i_correct = i_read;
if( ioctl( p_sys->fd_audio, SNDCTL_DSP_GETISPACE, &buf_info ) == 0 )
{
i_correct += buf_info.bytes;
}
*pp_data = p_sys->p_audio_frame;
*pi_data = p_sys->i_audio_frame_size;
*pi_pts = mdate() - (mtime_t)1000000 * (mtime_t)i_correct /
2 / ( p_sys->b_stereo ? 2 : 1) / p_sys->i_sample_rate;
return VLC_SUCCESS;
}
#endif
static int GrabVideo( input_thread_t * p_input, uint8_t **pp_data,
int *pi_data )
static int GrabVideo( input_thread_t * p_input,
uint8_t **pp_data,
int *pi_data,
mtime_t *pi_pts )
{
access_sys_t *p_sys = p_input->p_access_data;
......@@ -998,6 +1022,7 @@ static int GrabVideo( input_thread_t * p_input, uint8_t **pp_data,
*pp_data = p_sys->p_video_frame;
*pi_data = p_sys->i_video_frame_size;
*pi_pts = mdate();
return VLC_SUCCESS;
}
......@@ -1010,8 +1035,9 @@ static int GrabVideo( input_thread_t * p_input, uint8_t **pp_data,
static int Read( input_thread_t * p_input, byte_t * p_buffer, size_t i_len )
{
access_sys_t *p_sys = p_input->p_access_data;
int i_data = 0;
int i_stream;
int i_data = 0;
int i_stream;
mtime_t i_pts;
//msg_Info( p_input, "access read data_size %i, data_pos %i",
//p_sys->i_data_size, p_sys->i_data_pos );
......@@ -1069,11 +1095,11 @@ static int Read( input_thread_t * p_input, byte_t * p_buffer, size_t i_len )
#ifdef _V4L_AUDIO_
i_stream = 1;
if( p_sys->fd_audio < 0 ||
GrabAudio( p_input, &p_sys->p_data, &p_sys->i_data_size ) )
GrabAudio( p_input, &p_sys->p_data, &p_sys->i_data_size, &i_pts ) )
{
/* and then get video frame if no audio */
i_stream = 0;
if( GrabVideo( p_input, &p_sys->p_data, &p_sys->i_data_size ) )
if( GrabVideo( p_input, &p_sys->p_data, &p_sys->i_data_size, &i_pts ) )
{
return -1;
}
......@@ -1081,17 +1107,18 @@ static int Read( input_thread_t * p_input, byte_t * p_buffer, size_t i_len )
#else
/* and then get video frame if no audio */
i_stream = 0;
if( GrabVideo( p_input, &p_sys->p_data, &p_sys->i_data_size ) )
if( GrabVideo( p_input, &p_sys->p_data, &p_sys->i_data_size, &i_pts ) )
{
return -1;
}
#endif
/* create pseudo header */
p_sys->i_header_size = 8;
p_sys->i_header_size = 16;
p_sys->i_header_pos = 0;
SetDWBE( &p_sys->p_header[0], i_stream );
SetDWBE( &p_sys->p_header[4], p_sys->i_data_size );
SetQWBE( &p_sys->p_header[8], i_pts );
}
return i_data;
......@@ -1246,8 +1273,9 @@ static int Demux( input_thread_t *p_input )
int i_stream;
int i_size;
uint8_t *p_peek;
mtime_t i_pts;
if( input_Peek( p_input, &p_peek, 8 ) < 8 )
if( input_Peek( p_input, &p_peek, 16 ) < 16 )
{
msg_Warn( p_input, "cannot peek (EOF ?)" );
return( 0 );
......@@ -1255,6 +1283,7 @@ static int Demux( input_thread_t *p_input )
i_stream = GetDWBE( &p_peek[0] );
i_size = GetDWBE( &p_peek[4] );
i_pts = GetQWBE( &p_peek[8] );
//msg_Dbg( p_input, "stream=%d size=%d", i_stream, i_size );
// p_es = input_FindES( p_input, i_stream );
......@@ -1277,7 +1306,7 @@ static int Demux( input_thread_t *p_input )
msleep( 1000 );
return( 1 );
}
i_size += 8;
i_size += 16;
while( i_size > 0 )
{
data_packet_t *p_data;
......@@ -1305,8 +1334,8 @@ static int Demux( input_thread_t *p_input )
i_size -= i_read;
}
// input_SplitBuffer( p_input, &p_pk, i_size + 8 );
p_pes->p_first->p_payload_start += 8;
p_pes->i_pes_size -= 8;
p_pes->p_first->p_payload_start += 16;
p_pes->i_pes_size -= 16;
if( p_es && p_es->p_decoder_fifo )
{
vlc_mutex_lock( &p_es->p_decoder_fifo->data_lock );
......@@ -1317,8 +1346,8 @@ static int Demux( input_thread_t *p_input )
&p_es->p_decoder_fifo->data_lock );
}
vlc_mutex_unlock( &p_es->p_decoder_fifo->data_lock );
p_pes->i_pts = mdate() + p_input->i_pts_delay;
//p_pes->i_pts = mdate() + p_input->i_pts_delay;
p_pes->i_pts = p_pes->i_dts = i_pts + p_input->i_pts_delay;
input_DecodePES( p_es->p_decoder_fifo, p_pes );
}
else
......
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