You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
437 lines
15 KiB
437 lines
15 KiB
/*****************************************************************************
|
|
* rawdv.c : raw dv input module for vlc
|
|
*****************************************************************************
|
|
* Copyright (C) 2001 VideoLAN
|
|
* $Id: rawdv.c,v 1.10 2003/09/07 22:48:29 fenrir Exp $
|
|
*
|
|
* Authors: Gildas Bazin <gbazin@netcourrier.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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* Preamble
|
|
*****************************************************************************/
|
|
#include <stdlib.h> /* malloc(), free() */
|
|
#include <string.h> /* strdup() */
|
|
#include <errno.h>
|
|
|
|
#include <vlc/vlc.h>
|
|
#include <vlc/input.h>
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <codecs.h> /* BITMAPINFOHEADER, WAVEFORMATEX */
|
|
|
|
/*****************************************************************************
|
|
A little bit of background information (copied over from libdv glossary).
|
|
|
|
- DIF block: A block of 80 bytes. This is the basic data framing unit of the
|
|
DVC tape format, analogous to sectors of hard disc.
|
|
|
|
- Video Section: Each DIF sequence contains a video section, consisting of
|
|
135 DIF blocks, which are further subdivided into Video Segments.
|
|
|
|
- Video Segment: A video segment consists of 5 DIF blocks, each corresponding
|
|
to a single compressed macroblock.
|
|
|
|
*****************************************************************************/
|
|
|
|
|
|
/*****************************************************************************
|
|
* Constants
|
|
*****************************************************************************/
|
|
#define DV_PAL_FRAME_SIZE 144000
|
|
#define DV_NTSC_FRAME_SIZE 122000
|
|
|
|
/*****************************************************************************
|
|
* Definitions of structures used by this plugin
|
|
*****************************************************************************/
|
|
typedef struct {
|
|
int8_t sct; /* Section type (header,subcode,aux,audio,video) */
|
|
int8_t dsn; /* DIF sequence number (0-12) */
|
|
int fsc; /* First (0)/Second channel (1) */
|
|
int8_t dbn; /* DIF block number (0-134) */
|
|
} dv_id_t;
|
|
|
|
typedef struct {
|
|
int dsf; /* DIF sequence flag: 525/60 (0) or 625,50 (1) */
|
|
int8_t apt;
|
|
int tf1;
|
|
int8_t ap1;
|
|
int tf2;
|
|
int8_t ap2;
|
|
int tf3;
|
|
int8_t ap3;
|
|
} dv_header_t;
|
|
|
|
struct demux_sys_t
|
|
{
|
|
int frame_size;
|
|
|
|
es_descriptor_t *p_video_es;
|
|
es_descriptor_t *p_audio_es;
|
|
|
|
/* codec specific stuff */
|
|
BITMAPINFOHEADER *p_bih;
|
|
WAVEFORMATEX *p_wf;
|
|
|
|
double f_rate;
|
|
int i_bitrate;
|
|
|
|
/* program clock reference (in units of 90kHz) */
|
|
mtime_t i_pcr;
|
|
};
|
|
|
|
/*****************************************************************************
|
|
* Local prototypes
|
|
*****************************************************************************/
|
|
static int Activate ( vlc_object_t * );
|
|
static void Deactivate( vlc_object_t * );
|
|
static int Demux ( input_thread_t * );
|
|
|
|
/*****************************************************************************
|
|
* Module descriptor
|
|
*****************************************************************************/
|
|
vlc_module_begin();
|
|
set_description( _("raw dv demuxer") );
|
|
set_capability( "demux", 2 );
|
|
set_callbacks( Activate, NULL );
|
|
add_shortcut( "rawdv" );
|
|
vlc_module_end();
|
|
|
|
/*****************************************************************************
|
|
* Activate: initializes raw dv demux structures
|
|
*****************************************************************************/
|
|
static int Activate( vlc_object_t * p_this )
|
|
{
|
|
input_thread_t *p_input = (input_thread_t *)p_this;
|
|
byte_t *p_peek, *p_peek_backup;
|
|
uint32_t i_dword;
|
|
demux_sys_t *p_rawdv;
|
|
dv_header_t dv_header;
|
|
dv_id_t dv_id;
|
|
char *psz_ext;
|
|
|
|
/* It isn't easy to recognize a raw dv stream. The chances that we'll
|
|
* mistake a stream from another type for a raw dv stream are too high, so
|
|
* we'll rely on the file extension to trigger this demux. Alternatively,
|
|
* it is possible to force this demux. */
|
|
|
|
/* Check for dv file extension */
|
|
psz_ext = strrchr ( p_input->psz_name, '.' );
|
|
if( ( !psz_ext || strcasecmp( psz_ext, ".dv") )&&
|
|
( !p_input->psz_demux || strcmp(p_input->psz_demux, "rawdv") ) )
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
p_input->pf_demux = Demux;
|
|
p_input->pf_demux_control = demux_vaControlDefault;
|
|
|
|
/* Have a peep at the show. */
|
|
if( input_Peek(p_input, &p_peek, DV_PAL_FRAME_SIZE) < DV_NTSC_FRAME_SIZE )
|
|
{
|
|
/* Stream too short ... */
|
|
msg_Err( p_input, "cannot peek()" );
|
|
return -1;
|
|
}
|
|
p_peek_backup = p_peek;
|
|
|
|
/* fill in the dv_id_t structure */
|
|
i_dword = GetDWBE( p_peek ); p_peek += 4;
|
|
dv_id.sct = i_dword >> (32 - 3);
|
|
i_dword <<= 8;
|
|
dv_id.dsn = i_dword >> (32 - 4);
|
|
i_dword <<= 4;
|
|
dv_id.fsc = i_dword >> (32 - 1);
|
|
i_dword <<= 4;
|
|
dv_id.dbn = i_dword >> (32 - 8);
|
|
i_dword <<= 8;
|
|
|
|
if( dv_id.sct != 0 )
|
|
{
|
|
msg_Warn( p_input, "not a raw dv stream header" );
|
|
return -1;
|
|
}
|
|
|
|
/* fill in the dv_header_t structure */
|
|
dv_header.dsf = i_dword >> (32 - 1);
|
|
i_dword <<= 1;
|
|
if( i_dword >> (32 - 1) ) /* incorrect bit */
|
|
{
|
|
msg_Warn( p_input, "incorrect bit" );
|
|
return -1;
|
|
}
|
|
|
|
i_dword = GetDWBE( p_peek ); p_peek += 4;
|
|
i_dword <<= 5;
|
|
dv_header.apt = i_dword >> (32 - 3);
|
|
i_dword <<= 3;
|
|
dv_header.tf1 = i_dword >> (32 - 1);
|
|
i_dword <<= 5;
|
|
dv_header.ap1 = i_dword >> (32 - 3);
|
|
i_dword <<= 3;
|
|
dv_header.tf2 = i_dword >> (32 - 1);
|
|
i_dword <<= 5;
|
|
dv_header.ap2 = i_dword >> (32 - 3);
|
|
i_dword <<= 3;
|
|
dv_header.tf3 = i_dword >> (32 - 1);
|
|
i_dword <<= 5;
|
|
dv_header.ap3 = i_dword >> (32 - 3);
|
|
|
|
p_peek += 72; /* skip rest of DIF block */
|
|
|
|
|
|
/* Setup the structures for our demuxer */
|
|
if( !( p_rawdv = malloc( sizeof( demux_sys_t ) ) ) )
|
|
{
|
|
msg_Err( p_input, "out of memory" );
|
|
return -1;
|
|
}
|
|
memset( p_rawdv, 0, sizeof( demux_sys_t ) );
|
|
p_rawdv->p_bih = NULL;
|
|
p_rawdv->p_wf = NULL;
|
|
p_input->p_demux_data = p_rawdv;
|
|
|
|
p_rawdv->p_bih = (BITMAPINFOHEADER *) malloc( sizeof(BITMAPINFOHEADER) );
|
|
if( !p_rawdv->p_bih )
|
|
{
|
|
msg_Err( p_input, "out of memory" );
|
|
goto error;
|
|
}
|
|
p_rawdv->p_bih->biSize = sizeof(BITMAPINFOHEADER);
|
|
p_rawdv->p_bih->biCompression = VLC_FOURCC( 'd','v','s','d' );
|
|
p_rawdv->p_bih->biSize = 40;
|
|
p_rawdv->p_bih->biWidth = 720;
|
|
p_rawdv->p_bih->biHeight = dv_header.dsf ? 576 : 480;
|
|
p_rawdv->p_bih->biPlanes = 1;
|
|
p_rawdv->p_bih->biBitCount = 24;
|
|
p_rawdv->p_bih->biSizeImage =
|
|
p_rawdv->p_bih->biWidth * p_rawdv->p_bih->biHeight
|
|
* (p_rawdv->p_bih->biBitCount >> 3);
|
|
|
|
/* Properties of our video */
|
|
if( dv_header.dsf )
|
|
{
|
|
p_rawdv->frame_size = 12 * 150 * 80;
|
|
p_rawdv->f_rate = 25;
|
|
}
|
|
else
|
|
{
|
|
p_rawdv->frame_size = 10 * 150 * 80;
|
|
p_rawdv->f_rate = 29.97;
|
|
}
|
|
|
|
/* Audio stuff */
|
|
#if 0
|
|
p_peek = p_peek_backup + 80*6+80*16*3 + 3; /* beginning of AAUX pack */
|
|
|
|
if( *p_peek != 0x50 || *p_peek != 0x51 )
|
|
{
|
|
msg_Err( p_input, "AAUX should begin with 0x50" );
|
|
}
|
|
#endif
|
|
|
|
p_rawdv->p_wf = (WAVEFORMATEX *)malloc( sizeof(WAVEFORMATEX) );
|
|
if( !p_rawdv->p_wf )
|
|
{
|
|
msg_Err( p_input, "out of memory" );
|
|
goto error;
|
|
}
|
|
|
|
p_rawdv->p_wf->wFormatTag = 0;
|
|
p_rawdv->p_wf->nChannels = 2;
|
|
p_rawdv->p_wf->nSamplesPerSec = 44100; /* FIXME */
|
|
p_rawdv->p_wf->nAvgBytesPerSec = p_rawdv->f_rate * p_rawdv->frame_size;
|
|
p_rawdv->p_wf->nBlockAlign = p_rawdv->frame_size;
|
|
p_rawdv->p_wf->wBitsPerSample = 16;
|
|
p_rawdv->p_wf->cbSize = 0;
|
|
|
|
|
|
/* necessary because input_SplitBuffer() will only get
|
|
* INPUT_DEFAULT_BUFSIZE bytes at a time. */
|
|
p_input->i_bufsize = p_rawdv->frame_size;
|
|
|
|
/* Create one program */
|
|
vlc_mutex_lock( &p_input->stream.stream_lock );
|
|
if( input_InitStream( p_input, 0 ) == -1)
|
|
{
|
|
vlc_mutex_unlock( &p_input->stream.stream_lock );
|
|
msg_Err( p_input, "cannot init stream" );
|
|
goto error;
|
|
}
|
|
if( input_AddProgram( p_input, 0, 0) == NULL )
|
|
{
|
|
vlc_mutex_unlock( &p_input->stream.stream_lock );
|
|
msg_Err( p_input, "cannot add program" );
|
|
goto error;
|
|
}
|
|
p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
|
|
p_input->stream.i_mux_rate = p_rawdv->frame_size * p_rawdv->f_rate;
|
|
vlc_mutex_unlock( &p_input->stream.stream_lock );
|
|
|
|
/* Add video stream */
|
|
vlc_mutex_lock( &p_input->stream.stream_lock );
|
|
p_rawdv->p_video_es = input_AddES( p_input,
|
|
p_input->stream.p_selected_program,
|
|
1, VIDEO_ES, NULL, 0 );
|
|
p_rawdv->p_video_es->i_stream_id = 0;
|
|
p_rawdv->p_video_es->i_fourcc = VLC_FOURCC( 'd','v','s','d' );
|
|
p_rawdv->p_video_es->p_bitmapinfoheader = (void *)p_rawdv->p_bih;
|
|
input_SelectES( p_input, p_rawdv->p_video_es );
|
|
vlc_mutex_unlock( &p_input->stream.stream_lock );
|
|
|
|
/* Add audio stream */
|
|
vlc_mutex_lock( &p_input->stream.stream_lock );
|
|
p_rawdv->p_audio_es = input_AddES( p_input,
|
|
p_input->stream.p_selected_program,
|
|
2, AUDIO_ES, NULL, 0 );
|
|
p_rawdv->p_audio_es->i_stream_id = 1;
|
|
p_rawdv->p_audio_es->i_fourcc = VLC_FOURCC( 'd','v','a','u' );
|
|
p_rawdv->p_audio_es->p_waveformatex = (void *)p_rawdv->p_wf;
|
|
input_SelectES( p_input, p_rawdv->p_audio_es );
|
|
vlc_mutex_unlock( &p_input->stream.stream_lock );
|
|
|
|
/* Init pcr */
|
|
p_rawdv->i_pcr = 0;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
if( p_rawdv->p_bih ) free( p_rawdv->p_bih );
|
|
if( p_rawdv->p_wf ) free( p_rawdv->p_wf );
|
|
Deactivate( (vlc_object_t *)p_input );
|
|
return -1;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Deactivate: frees unused data
|
|
*****************************************************************************/
|
|
static void Deactivate( vlc_object_t *p_this )
|
|
{
|
|
input_thread_t *p_input = (input_thread_t *)p_this;
|
|
demux_sys_t *p_rawdv = (demux_sys_t *)p_input->p_demux_data;
|
|
|
|
free( p_rawdv );
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Demux: reads and demuxes data packets
|
|
*****************************************************************************
|
|
* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
|
|
*****************************************************************************/
|
|
static int Demux( input_thread_t * p_input )
|
|
{
|
|
demux_sys_t *p_rawdv = (demux_sys_t *)p_input->p_demux_data;
|
|
pes_packet_t *p_pes = NULL;
|
|
pes_packet_t *p_audio_pes = NULL;
|
|
data_packet_t *p_data;
|
|
ssize_t i_read;
|
|
|
|
if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
|
|
{
|
|
off_t i_pos;
|
|
|
|
msg_Warn( p_input, "synchro reinit" );
|
|
|
|
/* If the user tried to seek in the stream, we need to make sure
|
|
* the new position is at a DIF block boundary. */
|
|
vlc_mutex_lock( &p_input->stream.stream_lock );
|
|
i_pos= p_input->stream.p_selected_area->i_tell;
|
|
vlc_mutex_unlock( &p_input->stream.stream_lock );
|
|
|
|
if( (i_pos % p_rawdv->frame_size) &&
|
|
p_input->stream.b_seekable &&
|
|
p_input->stream.i_method == INPUT_METHOD_FILE )
|
|
{
|
|
p_input->pf_seek( p_input, (i_pos / p_rawdv->frame_size)
|
|
* p_rawdv->frame_size );
|
|
input_AccessReinit( p_input );
|
|
}
|
|
}
|
|
|
|
/* Call the pace control */
|
|
input_ClockManageRef( p_input, p_input->stream.p_selected_program,
|
|
p_rawdv->i_pcr );
|
|
|
|
i_read = input_SplitBuffer( p_input, &p_data, p_rawdv->frame_size );
|
|
if( i_read <= 0 )
|
|
{
|
|
return i_read;
|
|
}
|
|
|
|
/* Build video PES packet */
|
|
if( p_rawdv->p_video_es->p_decoder_fifo )
|
|
{
|
|
p_pes = input_NewPES( p_input->p_method_data );
|
|
if( p_pes == NULL )
|
|
{
|
|
msg_Err( p_input, "out of memory" );
|
|
input_DeletePacket( p_input->p_method_data, p_data );
|
|
return -1;
|
|
}
|
|
|
|
p_pes->i_rate = p_input->stream.control.i_rate;
|
|
p_pes->p_first = p_pes->p_last = p_data;
|
|
p_pes->i_pes_size = i_read;
|
|
p_pes->i_nb_data = 1;
|
|
p_pes->i_pts =
|
|
input_ClockGetTS( p_input, p_input->stream.p_selected_program,
|
|
p_rawdv->i_pcr );
|
|
}
|
|
|
|
/* Do the same for audio */
|
|
if( p_rawdv->p_audio_es->p_decoder_fifo )
|
|
{
|
|
p_audio_pes = input_NewPES( p_input->p_method_data );
|
|
if( p_audio_pes == NULL )
|
|
{
|
|
msg_Err( p_input, "out of memory" );
|
|
input_DeletePacket( p_input->p_method_data, p_data );
|
|
return -1;
|
|
}
|
|
p_audio_pes->i_rate = p_input->stream.control.i_rate;
|
|
|
|
if( p_rawdv->p_video_es->p_decoder_fifo )
|
|
p_audio_pes->p_first = p_audio_pes->p_last =
|
|
input_ShareBuffer( p_input->p_method_data, p_data->p_buffer );
|
|
else
|
|
p_audio_pes->p_first = p_audio_pes->p_last = p_data;
|
|
|
|
p_audio_pes->p_first->p_next = p_data->p_next;
|
|
p_audio_pes->p_first->p_payload_start = p_data->p_payload_start;
|
|
p_audio_pes->p_first->p_payload_end = p_data->p_payload_end;
|
|
p_audio_pes->i_pes_size = i_read;
|
|
p_audio_pes->i_nb_data = 1;
|
|
p_audio_pes->i_pts =
|
|
input_ClockGetTS( p_input, p_input->stream.p_selected_program,
|
|
p_rawdv->i_pcr );
|
|
}
|
|
|
|
/* Decode PES packets if stream is selected */
|
|
if( p_rawdv->p_video_es->p_decoder_fifo )
|
|
input_DecodePES( p_rawdv->p_video_es->p_decoder_fifo, p_pes );
|
|
if( p_rawdv->p_audio_es->p_decoder_fifo )
|
|
input_DecodePES( p_rawdv->p_audio_es->p_decoder_fifo, p_audio_pes );
|
|
|
|
p_rawdv->i_pcr += ( 90000 / p_rawdv->f_rate );
|
|
|
|
if( !p_rawdv->p_video_es->p_decoder_fifo &&
|
|
!p_rawdv->p_audio_es->p_decoder_fifo )
|
|
input_DeletePacket( p_input->p_method_data, p_data );
|
|
|
|
return 1;
|
|
}
|
|
|