Skip to content

V
vlc-2-2
Commit 7369bb2a authored by Gildas Bazin's avatar Gildas Bazin
Browse files
Options 

* include/input_ext-intf.h, include/vlc_es.h: moved ES categories into vlc_es.h
* modules/codec/lpcm.c: ported to the new decoders api + lpcm packetizer.
parent 348244d2
Show whitespace changes
Inline Side-by-side
Showing with 134 additions and 242 deletions
include/input_ext-intf.h
View file @ 7369bb2a
......@@ -4,7 +4,7 @@
* control the pace of reading.
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
* $Id: input_ext-intf.h,v 1.98 2003/11/16 21:07:30 gbazin Exp $
* $Id: input_ext-intf.h,v 1.99 2003/11/22 18:04:10 gbazin Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
......@@ -86,14 +86,6 @@ struct es_descriptor_t
#define CONDITIONNAL_ACCESS_TABLE_PID 0x0001 /* not used */
#define EMPTY_ID 0xffff /* empty record in a table */
/* ES Categories to be used by interface plugins */
#define UNKNOWN_ES 0x00
#define VIDEO_ES 0x01
#define AUDIO_ES 0x02
#define SPU_ES 0x03
#define NAV_ES 0x04
/*****************************************************************************
* pgrm_descriptor_t
*****************************************************************************
......
include/vlc_es.h
View file @ 7369bb2a
......@@ -2,7 +2,7 @@
* vlc_es.h
*****************************************************************************
* Copyright (C) 1999-2001 VideoLAN
* $Id: vlc_es.h,v 1.2 2003/11/21 15:32:08 fenrir Exp $
* $Id: vlc_es.h,v 1.3 2003/11/22 18:04:10 gbazin Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
......@@ -118,6 +118,13 @@ struct es_format_t
};
/* ES Categories */
#define UNKNOWN_ES 0x00
#define VIDEO_ES 0x01
#define AUDIO_ES 0x02
#define SPU_ES 0x03
#define NAV_ES 0x04
static inline void es_format_Init( es_format_t *fmt,
int i_cat, vlc_fourcc_t i_codec )
{
......
modules/codec/lpcm.c
View file @ 7369bb2a
/*****************************************************************************
* lpcm.c: lpcm decoder module
* lpcm.c: lpcm decoder/packetizer module
*****************************************************************************
* Copyright (C) 1999-2001 VideoLAN
* $Id: lpcm.c,v 1.18 2003/11/16 21:07:30 gbazin Exp $
* Copyright (C) 1999-2003 VideoLAN
* $Id: lpcm.c,v 1.19 2003/11/22 18:04:10 gbazin Exp $
*
* Authors: Samuel Hocevar <sam@zoy.org>
* Henri Fallon <henri@videolan.org>
* Christophe Massiot <massiot@via.ecp.fr>
* 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
......@@ -26,46 +27,29 @@
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h> /* malloc(), free() */
#include <string.h> /* memcpy(), memset() */
#include <vlc/vlc.h>
#include <vlc/aout.h>
#include <vlc/decoder.h>
#include <input_ext-dec.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h> /* getpid() */
#endif
/*****************************************************************************
* dec_thread_t : lpcm decoder thread descriptor
* decoder_sys_t : lpcm decoder descriptor
*****************************************************************************/
typedef struct dec_thread_t
struct decoder_sys_t
{
/*
* Input properties
*/
decoder_fifo_t * p_fifo; /* stores the PES stream data */
/* Some filters don't handle well too small buffers (coreaudio resampler).
* Thus an aout buffer will be two PES packets. */
pes_packet_t * p_buffered_pes;
data_packet_t * p_buffered_data;
size_t i_buffered_size;
/* Module mode */
vlc_bool_t b_packetizer;
/*
* Output properties
*/
aout_instance_t *p_aout;
aout_input_t *p_aout_input;
audio_sample_format_t output_format;
audio_date_t end_date;
} dec_thread_t;
};
/*
* LPCM header :
* - PES header
* - private stream ID (16 bits) == 0xA0 -> not in the bitstream
*
* - frame number (8 bits)
* - unknown (16 bits) == 0x0003 ?
* - unknown (4 bits)
......@@ -83,18 +67,25 @@ typedef struct dec_thread_t
* Local prototypes
*****************************************************************************/
static int OpenDecoder ( vlc_object_t * );
static int RunDecoder ( decoder_fifo_t * );
static int OpenPacketizer( vlc_object_t * );
static void CloseDecoder ( vlc_object_t * );
static void DecodeFrame ( dec_thread_t * );
static void EndThread ( dec_thread_t * );
static void *DecodeFrame ( decoder_t *, block_t ** );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
set_description( _("linear PCM audio parser") );
set_description( _("linear PCM audio decoder") );
set_capability( "decoder", 100 );
set_callbacks( OpenDecoder, NULL );
set_callbacks( OpenDecoder, CloseDecoder );
add_submodule();
set_description( _("linear PCM audio packetizer") );
set_capability( "packetizer", 100 );
set_callbacks( OpenPacketizer, CloseDecoder );
vlc_module_end();
/*****************************************************************************
......@@ -103,6 +94,7 @@ vlc_module_end();
static int OpenDecoder( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t*)p_this;
decoder_sys_t *p_sys;
if( p_dec->fmt_in.i_codec != VLC_FOURCC('l','p','c','m')
&& p_dec->fmt_in.i_codec != VLC_FOURCC('l','p','c','b') )
......@@ -110,111 +102,86 @@ static int OpenDecoder( vlc_object_t *p_this )
return VLC_EGENERIC;
}
p_dec->pf_run = RunDecoder;
/* Allocate the memory needed to store the decoder's structure */
if( ( p_dec->p_sys = p_sys =
(decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
{
msg_Err( p_dec, "out of memory" );
return VLC_EGENERIC;
}
/* Misc init */
p_sys->b_packetizer = VLC_FALSE;
aout_DateSet( &p_sys->end_date, 0 );
/* Set output properties */
p_dec->fmt_out.i_cat = AUDIO_ES;
p_dec->fmt_out.i_codec = VLC_FOURCC('s','1','6','b');
/* Set callback */
p_dec->pf_decode_audio = (aout_buffer_t *(*)(decoder_t *, block_t **))
DecodeFrame;
p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
DecodeFrame;
return VLC_SUCCESS;
}
/*****************************************************************************
* RunDecoder: the lpcm decoder
*****************************************************************************/
static int RunDecoder( decoder_fifo_t * p_fifo )
static int OpenPacketizer( vlc_object_t *p_this )
{
dec_thread_t * p_dec;
/* Allocate the memory needed to store the thread's structure */
if( (p_dec = (dec_thread_t *)malloc( sizeof(dec_thread_t)) )
== NULL)
{
msg_Err( p_fifo, "out of memory" );
DecoderError( p_fifo );
return -1;
}
decoder_t *p_dec = (decoder_t*)p_this;
/* Initialize the thread properties */
p_dec->p_fifo = p_fifo;
p_dec->i_buffered_size = 0;
int i_ret = OpenDecoder( p_this );
p_dec->output_format.i_format = VLC_FOURCC('s','1','6','b');
p_dec->p_aout = NULL;
p_dec->p_aout_input = NULL;
if( i_ret != VLC_SUCCESS ) return i_ret;
/* LPCM decoder thread's main loop */
while ( (!p_dec->p_fifo->b_die) && (!p_dec->p_fifo->b_error) )
{
DecodeFrame(p_dec);
}
/* If b_error is set, the lpcm decoder thread enters the error loop */
if ( p_dec->p_fifo->b_error )
{
DecoderError( p_dec->p_fifo );
}
p_dec->p_sys->b_packetizer = VLC_TRUE;
/* End of the lpcm decoder thread */
EndThread( p_dec );
p_dec->fmt_out.i_codec = VLC_FOURCC('l','p','c','m');
return 0;
return i_ret;
}
/*****************************************************************************
* DecodeFrame: decodes a frame.
* DecodeFrame: decodes an lpcm frame.
****************************************************************************
* Beware, this function must be fed with complete frames (PES packet).
*****************************************************************************/
static void DecodeFrame( dec_thread_t * p_dec )
static void *DecodeFrame( decoder_t *p_dec, block_t **pp_block )
{
pes_packet_t * p_pes;
data_packet_t * p_data;
aout_buffer_t * p_buffer;
void * p_dest;
mtime_t i_pts;
decoder_sys_t *p_sys = p_dec->p_sys;
block_t *p_block;
unsigned int i_rate = 0, i_original_channels = 0, i_channels = 0;
int i_frame_length;
uint8_t i_header;
unsigned int i_rate = 0, i_original_channels = 0, i_size;
int i;
input_ExtractPES( p_dec->p_fifo, &p_pes );
if ( !p_pes )
{
p_dec->p_fifo->b_error = 1;
return;
}
if( !pp_block || !*pp_block ) return NULL;
/* Compute the size of the PES - i_pes_size includes the PES header. */
p_data = p_pes->p_first;
i_size = 0;
while ( p_data != NULL )
{
i_size += p_data->p_payload_end - p_data->p_payload_start;
p_data = p_data->p_next;
}
if ( i_size < LPCM_HEADER_LEN )
p_block = *pp_block;
*pp_block = NULL; /* So the packet doesn't get re-sent */
/* Date management */
if( p_block->i_pts > 0 &&
p_block->i_pts != aout_DateGet( &p_sys->end_date ) )
{
msg_Err(p_dec->p_fifo, "PES packet is too short");
input_DeletePES( p_dec->p_fifo->p_packets_mgt, p_pes );
return;
aout_DateSet( &p_sys->end_date, p_block->i_pts );
}
i_pts = p_pes->i_pts;
if( i_pts != 0 && i_pts != aout_DateGet( &p_dec->end_date ) )
if( !aout_DateGet( &p_sys->end_date ) )
{
aout_DateSet( &p_dec->end_date, i_pts );
/* We've just started the stream, wait for the first PTS. */
block_Release( p_block );
return NULL;
}
p_data = p_pes->p_first;
/* It necessarily contains one byte. */
/* Get LPCM header. */
/* Drop the first four bytes. */
for ( i = 0; i < 4; i++ )
{
if ( p_data->p_payload_end == p_data->p_payload_start )
if( p_block->i_buffer <= LPCM_HEADER_LEN )
{
p_data = p_data->p_next;
msg_Err(p_dec, "frame is too short");
block_Release( p_block );
return NULL;
}
p_data->p_payload_start++;
}
i_header = p_data->p_payload_start[0];
p_data->p_payload_start++;
i_header = p_block->p_buffer[4];
switch ( (i_header >> 4) & 0x3 )
{
case 0:
......@@ -231,7 +198,8 @@ static void DecodeFrame( dec_thread_t * p_dec )
break;
}
switch ( i_header & 0x7 )
i_channels = (i_header & 0x7);
switch ( i_channels )
{
case 0:
i_original_channels = AOUT_CHAN_CENTER;
......@@ -273,137 +241,62 @@ static void DecodeFrame( dec_thread_t * p_dec )
}
/* Check frame sync and drop it. */
if ( p_data->p_payload_end == p_data->p_payload_start )
if( p_block->p_buffer[5] != 0x80 )
{
p_data = p_data->p_next;
msg_Warn( p_dec, "no frame sync" );
block_Release( p_block );
return NULL;
}
if ( p_data->p_payload_start[0] != 0x80 )
{
msg_Warn(p_dec->p_fifo, "no frame sync");
input_DeletePES( p_dec->p_fifo->p_packets_mgt, p_pes );
return;
}
p_data->p_payload_start++;
if( (p_dec->p_aout_input != NULL) &&
( (p_dec->output_format.i_rate != i_rate)
|| (p_dec->output_format.i_original_channels
!= i_original_channels) ) )
/* Set output properties */
if( p_dec->fmt_out.audio.i_rate != i_rate )
{
/* Parameters changed - this should not happen. */
aout_DecDelete( p_dec->p_aout, p_dec->p_aout_input );
p_dec->p_aout_input = NULL;
aout_DateInit( &p_sys->end_date, i_rate );
aout_DateSet( &p_sys->end_date, p_block->i_pts );
}
/* Creating the audio input if not created yet. */
if( p_dec->p_aout_input == NULL )
{
p_dec->output_format.i_rate = i_rate;
p_dec->output_format.i_original_channels = i_original_channels;
p_dec->output_format.i_physical_channels
p_dec->fmt_out.audio.i_rate = i_rate;
p_dec->fmt_out.audio.i_channels = i_channels + 1;
p_dec->fmt_out.audio.i_original_channels = i_original_channels;
p_dec->fmt_out.audio.i_physical_channels
= i_original_channels & AOUT_CHAN_PHYSMASK;
aout_DateInit( &p_dec->end_date, i_rate );
aout_DateSet( &p_dec->end_date, i_pts );
p_dec->p_aout_input = aout_DecNew( p_dec->p_fifo,
&p_dec->p_aout,
&p_dec->output_format );
if ( p_dec->p_aout_input == NULL )
{
p_dec->p_fifo->b_error = 1;
input_DeletePES( p_dec->p_fifo->p_packets_mgt, p_pes );
return;
}
i_frame_length = (p_block->i_buffer - LPCM_HEADER_LEN) /
( p_dec->fmt_out.audio.i_channels * 2 );
if ( p_dec->i_buffered_size )
if( p_sys->b_packetizer )
{
input_DeletePES( p_dec->p_fifo->p_packets_mgt,
p_dec->p_buffered_pes );
p_dec->i_buffered_size = 0;
}
}
if ( !aout_DateGet( &p_dec->end_date ) )
{
/* We've just started the stream, wait for the first PTS. */
input_DeletePES( p_dec->p_fifo->p_packets_mgt, p_pes );
return;
}
if ( p_dec->i_buffered_size != 0 )
{
p_buffer = aout_DecNewBuffer( p_dec->p_aout, p_dec->p_aout_input,
(i_size - LPCM_HEADER_LEN + p_dec->i_buffered_size)
/ p_dec->output_format.i_bytes_per_frame );
p_block->i_pts = p_block->i_dts = aout_DateGet( &p_sys->end_date );
p_block->i_length =
aout_DateIncrement( &p_sys->end_date, i_frame_length ) -
p_block->i_pts;
if( p_buffer == NULL )
{
msg_Err( p_dec->p_fifo, "cannot get aout buffer" );
p_dec->p_fifo->b_error = 1;
input_DeletePES( p_dec->p_fifo->p_packets_mgt, p_pes );
return;
/* Just pass on the incoming frame */
return p_block;
}
p_buffer->start_date = aout_DateGet( &p_dec->end_date );
p_buffer->end_date = aout_DateIncrement( &p_dec->end_date,
(i_size - LPCM_HEADER_LEN + p_dec->i_buffered_size)
/ p_dec->output_format.i_bytes_per_frame );
/* Get the whole frame. */
p_dest = p_buffer->p_buffer;
while ( p_dec->p_buffered_data != NULL )
else
{
p_dec->p_fifo->p_vlc->pf_memcpy( p_dest,
p_dec->p_buffered_data->p_payload_start,
p_dec->p_buffered_data->p_payload_end
- p_dec->p_buffered_data->p_payload_start );
p_dest += p_dec->p_buffered_data->p_payload_end
- p_dec->p_buffered_data->p_payload_start;
p_dec->p_buffered_data = p_dec->p_buffered_data->p_next;
}
input_DeletePES( p_dec->p_fifo->p_packets_mgt,
p_dec->p_buffered_pes );
aout_buffer_t *p_aout_buffer;
p_aout_buffer = p_dec->pf_aout_buffer_new( p_dec, i_frame_length );
if( p_aout_buffer == NULL ) return NULL;
p_dest = p_buffer->p_buffer + p_dec->i_buffered_size;
p_aout_buffer->start_date = aout_DateGet( &p_sys->end_date );
p_aout_buffer->end_date =
aout_DateIncrement( &p_sys->end_date, i_frame_length );
while ( p_data != NULL )
{
p_dec->p_fifo->p_vlc->pf_memcpy( p_dest, p_data->p_payload_start,
p_data->p_payload_end - p_data->p_payload_start );
p_dest += p_data->p_payload_end - p_data->p_payload_start;
p_data = p_data->p_next;
}
input_DeletePES( p_dec->p_fifo->p_packets_mgt, p_pes );
/* Send the buffer to the aout core. */
aout_DecPlay( p_dec->p_aout, p_dec->p_aout_input, p_buffer );
memcpy( p_aout_buffer->p_buffer,
p_block->p_buffer + LPCM_HEADER_LEN,
p_block->i_buffer - LPCM_HEADER_LEN );
p_dec->i_buffered_size = 0;
}
else
{
p_dec->i_buffered_size = i_size - LPCM_HEADER_LEN;
p_dec->p_buffered_pes = p_pes;
p_dec->p_buffered_data = p_data;
block_Release( p_block );
return p_aout_buffer;
}
}
/*****************************************************************************
* EndThread : lpcm decoder thread destruction
* CloseDecoder : lpcm decoder destruction
*****************************************************************************/
static void EndThread( dec_thread_t * p_dec )
static void CloseDecoder( vlc_object_t *p_this )
{
if( p_dec->p_aout_input != NULL )
{
aout_DecDelete( p_dec->p_aout, p_dec->p_aout_input );
}
if ( p_dec->i_buffered_size )
{
input_DeletePES( p_dec->p_fifo->p_packets_mgt,
p_dec->p_buffered_pes );
p_dec->i_buffered_size = 0;
}
free( p_dec );
decoder_t *p_dec = (decoder_t*)p_this;
free( p_dec->p_sys );
}
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment