* mpeg_es.c : Elementary Stream input module for vlc
*****************************************************************************
* Copyright (C) 2001 VideoLAN
- * $Id: mpeg_es.c,v 1.2 2001/12/30 07:09:55 sam Exp $
+ * $Id: mpeg_es.c,v 1.6 2002/03/18 19:14:52 sam Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
*****************************************************************************/
#include <stdlib.h> /* malloc(), free() */
#include <string.h> /* strdup() */
+#include <errno.h>
#include <videolan/vlc.h>
+#include <sys/types.h>
+
+#include "stream_control.h"
+#include "input_ext-intf.h"
+#include "input_ext-dec.h"
+#include "input_ext-plugins.h"
+
+/*****************************************************************************
+ * Constants
+ *****************************************************************************/
+#define ES_PACKET_SIZE 65536
+#define MAX_PACKETS_IN_FIFO 3
+
/*****************************************************************************
- * Capabilities defined in the other files.
+ * Local prototypes
*****************************************************************************/
-void _M( input_getfunctions )( function_list_t * p_function_list );
+static void input_getfunctions( function_list_t * p_function_list );
+static int ESDemux ( struct input_thread_s * );
+static int ESInit ( struct input_thread_s * );
+static void ESEnd ( struct input_thread_s * );
/*****************************************************************************
* Build configuration tree.
MODULE_CONFIG_STOP
MODULE_INIT_START
- SET_DESCRIPTION( "ISO 13818-1 MPEG Elementary Stream input" )
- ADD_CAPABILITY( INPUT, 50 )
+ SET_DESCRIPTION( "ISO 13818-2 MPEG Elementary Stream input" )
+ ADD_CAPABILITY( DEMUX, 150 )
ADD_SHORTCUT( "es" )
MODULE_INIT_STOP
MODULE_ACTIVATE_START
- _M( input_getfunctions )( &p_module->p_functions->input );
+ input_getfunctions( &p_module->p_functions->demux );
MODULE_ACTIVATE_STOP
MODULE_DEACTIVATE_START
MODULE_DEACTIVATE_STOP
+/*****************************************************************************
+ * Functions exported as capabilities. They are declared as static so that
+ * we don't pollute the namespace too much.
+ *****************************************************************************/
+static void input_getfunctions( function_list_t * p_function_list )
+{
+#define input p_function_list->functions.demux
+ input.pf_init = ESInit;
+ input.pf_end = ESEnd;
+ input.pf_demux = ESDemux;
+ input.pf_rewind = NULL;
+#undef input
+}
+
+/*
+ * Data reading functions
+ */
+
+/*****************************************************************************
+ * ESInit: initializes ES structures
+ *****************************************************************************/
+static int ESInit( input_thread_t * p_input )
+{
+ es_descriptor_t * p_es;
+ byte_t * p_peek;
+
+ /* Initialize access plug-in structures. */
+ if( p_input->i_mtu == 0 )
+ {
+ /* Improve speed. */
+ p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE;
+ }
+
+ /* Have a peep at the show. */
+ if( input_Peek( p_input, &p_peek, 4 ) < 4 )
+ {
+ /* Stream shorter than 4 bytes... */
+ intf_ErrMsg( "input error: cannot peek() (mpeg_es)" );
+ return( -1 );
+ }
+
+ if( *p_peek || *(p_peek + 1) || *(p_peek + 2) != 1 )
+ {
+ if( *p_input->psz_demux && strncmp( !p_input->psz_demux, "es", 3 ) )
+ {
+ /* User forced */
+ intf_ErrMsg( "input error: this doesn't look like an MPEG ES stream, continuing" );
+ }
+ else
+ {
+ intf_WarnMsg( 2, "input: ES plug-in discarded (no startcode)" );
+ return( -1 );
+ }
+ }
+ else if( *(p_peek + 3) > 0xb9 )
+ {
+ if( *p_input->psz_demux && strncmp( !p_input->psz_demux, "es", 3 ) )
+ {
+ /* User forced */
+ intf_ErrMsg( "input error: this seems to be a system stream (PS plug-in ?), but continuing" );
+ }
+ else
+ {
+ intf_WarnMsg( 2, "input: ES plug-in discarded (system startcode)" );
+ return( -1 );
+ }
+ }
+
+ if( input_InitStream( p_input, 0 ) == -1 )
+ {
+ return( -1 );
+ }
+ input_AddProgram( p_input, 0, 0 );
+ p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
+ vlc_mutex_lock( &p_input->stream.stream_lock );
+ p_es = input_AddES( p_input, p_input->stream.p_selected_program, 0xE0, 0 );
+ p_es->i_stream_id = 0xE0;
+ p_es->i_type = MPEG1_VIDEO_ES;
+ p_es->i_cat = VIDEO_ES;
+ input_SelectES( p_input, p_es );
+ p_input->stream.p_selected_area->i_tell = 0;
+ p_input->stream.p_selected_program->b_is_ok = 1;
+ vlc_mutex_unlock( &p_input->stream.stream_lock );
+
+ return( 0 );
+}
+
+/*****************************************************************************
+ * ESEnd: frees unused data
+ *****************************************************************************/
+static void ESEnd( input_thread_t * p_input )
+{
+}
+
+/*****************************************************************************
+ * ESDemux: reads and demuxes data packets
+ *****************************************************************************
+ * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
+ *****************************************************************************/
+static int ESDemux( input_thread_t * p_input )
+{
+ ssize_t i_read;
+ decoder_fifo_t * p_fifo =
+ p_input->stream.p_selected_program->pp_es[0]->p_decoder_fifo;
+ pes_packet_t * p_pes;
+ data_packet_t * p_data;
+
+ i_read = input_SplitBuffer( p_input, &p_data, ES_PACKET_SIZE );
+
+ if ( i_read <= 0 )
+ {
+ return( i_read );
+ }
+
+ p_pes = input_NewPES( p_input->p_method_data );
+
+ if( p_pes == NULL )
+ {
+ intf_ErrMsg("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_nb_data = 1;
+
+ vlc_mutex_lock( &p_fifo->data_lock );
+ if( p_fifo->i_depth >= MAX_PACKETS_IN_FIFO )
+ {
+ /* Wait for the decoder. */
+ vlc_cond_wait( &p_fifo->data_wait, &p_fifo->data_lock );
+ }
+ vlc_mutex_unlock( &p_fifo->data_lock );
+
+ if( (p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT)
+ | (input_ClockManageControl( p_input,
+ p_input->stream.p_selected_program,
+ (mtime_t)0 ) == PAUSE_S) )
+ {
+ intf_WarnMsg( 2, "synchro reinit" );
+ p_pes->i_pts = mdate() + DEFAULT_PTS_DELAY;
+ p_input->stream.p_selected_program->i_synchro_state = SYNCHRO_OK;
+ }
+
+ input_DecodePES( p_fifo, p_pes );
+
+ return( 1 );
+}
+
projects / vlc / blobdiff