/*****************************************************************************
- * mpeg_es.c : Elementary Stream input module for vlc
+ * es.c : Generic audio ES input module for vlc
*****************************************************************************
- * Copyright (C) 2001 VideoLAN
- * $Id: es.c,v 1.3 2003/05/05 22:23:36 gbazin Exp $
+ * Copyright (C) 2001-2008 the VideoLAN team
+ * $Id$
*
- * Authors: Christophe Massiot <massiot@via.ecp.fr>
+ * Authors: Laurent Aimar <fenrir@via.ecp.fr>
+ * Gildas Bazin <gbazin@videolan.org>
*
* 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
*
* 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.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <stdlib.h> /* malloc(), free() */
-#include <string.h> /* strdup() */
-#include <vlc/vlc.h>
-#include <vlc/input.h>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_demux.h>
+#include <vlc_codec.h>
+#include <vlc_input.h>
+
+#include "../../codec/a52.h"
/*****************************************************************************
- * Constants
+ * Module descriptor
*****************************************************************************/
-#define ES_PACKET_SIZE 65536
-#define MAX_PACKETS_IN_FIFO 3
+static int Open ( vlc_object_t * );
+static void Close( vlc_object_t * );
+
+vlc_module_begin ()
+ set_category( CAT_INPUT )
+ set_subcategory( SUBCAT_INPUT_DEMUX )
+ set_description( N_("MPEG-I/II/4 / A52 / DTS / MLP audio" ) )
+ set_capability( "demux", 155 )
+ set_callbacks( Open, Close )
+
+ add_shortcut( "mpga" )
+ add_shortcut( "mp3" )
+
+ add_shortcut( "m4a" )
+ add_shortcut( "mp4a" )
+ add_shortcut( "aac" )
+
+ add_shortcut( "ac3" )
+ add_shortcut( "a52" )
+
+ add_shortcut( "eac3" )
+
+ add_shortcut( "dts" )
+
+ add_shortcut( "mlp" )
+vlc_module_end ()
/*****************************************************************************
* Local prototypes
*****************************************************************************/
-static int Activate ( vlc_object_t * );
-static int Demux ( input_thread_t * );
+static int Demux ( demux_t * );
+static int Control( demux_t *, int, va_list );
+
+typedef struct
+{
+ vlc_fourcc_t i_codec;
+ bool b_use_word;
+ const char *psz_name;
+ int (*pf_probe)( demux_t *p_demux, int64_t *pi_offset );
+ int (*pf_init)( demux_t *p_demux );
+} codec_t;
+
+struct demux_sys_t
+{
+ codec_t codec;
+
+ es_out_id_t *p_es;
+
+ bool b_start;
+ decoder_t *p_packetizer;
+
+ mtime_t i_pts;
+ mtime_t i_time_offset;
+ int64_t i_bytes;
+
+ bool b_big_endian;
+ bool b_estimate_bitrate;
+ int i_bitrate_avg; /* extracted from Xing header */
+
+ bool b_initial_sync_failed;
+
+ int i_packet_size;
+
+ int64_t i_stream_offset;
+
+ /* Mpga specific */
+ struct
+ {
+ int i_frames;
+ int i_bytes;
+ int i_bitrate_avg;
+ int i_frame_samples;
+ } xing;
+};
+
+static int MpgaProbe( demux_t *p_demux, int64_t *pi_offset );
+static int MpgaInit( demux_t *p_demux );
+
+static int AacProbe( demux_t *p_demux, int64_t *pi_offset );
+static int AacInit( demux_t *p_demux );
+
+static int EA52Probe( demux_t *p_demux, int64_t *pi_offset );
+static int A52Probe( demux_t *p_demux, int64_t *pi_offset );
+static int A52Init( demux_t *p_demux );
+
+static int DtsProbe( demux_t *p_demux, int64_t *pi_offset );
+static int DtsInit( demux_t *p_demux );
+
+static int MlpProbe( demux_t *p_demux, int64_t *pi_offset );
+static int MlpInit( demux_t *p_demux );
+
+static const codec_t p_codec[] = {
+ { VLC_CODEC_MP4A, false, "mp4 audio", AacProbe, AacInit },
+ { VLC_CODEC_MPGA, false, "mpeg audio", MpgaProbe, MpgaInit },
+ { VLC_CODEC_A52, true, "a52 audio", A52Probe, A52Init },
+ { VLC_CODEC_EAC3, true, "eac3 audio", EA52Probe, A52Init },
+ { VLC_CODEC_DTS, false, "dts audio", DtsProbe, DtsInit },
+ { VLC_CODEC_MLP, false, "mlp audio", MlpProbe, MlpInit },
+
+ { 0, false, NULL, NULL, NULL }
+};
/*****************************************************************************
- * Module descriptor
+ * Open: initializes demux structures
*****************************************************************************/
-vlc_module_begin();
- set_description( _("ISO 13818-1 MPEG Elementary Stream input") );
- set_capability( "demux", 150 );
- set_callbacks( Activate, NULL );
- add_shortcut( "es" );
-vlc_module_end();
+static int Open( vlc_object_t * p_this )
+{
+ demux_t *p_demux = (demux_t*)p_this;
+ demux_sys_t *p_sys;
+
+ es_format_t fmt;
+ int64_t i_offset;
+ int i_index;
+
+ for( i_index = 0; p_codec[i_index].i_codec != 0; i_index++ )
+ {
+ if( !p_codec[i_index].pf_probe( p_demux, &i_offset ) )
+ break;
+ }
+
+ if( p_codec[i_index].i_codec == 0 )
+ return VLC_EGENERIC;
+
+ DEMUX_INIT_COMMON(); p_sys = p_demux->p_sys;
+ memset( p_sys, 0, sizeof( demux_sys_t ) );
+ p_sys->codec = p_codec[i_index];
+ p_sys->p_es = NULL;
+ p_sys->b_start = true;
+ p_sys->i_stream_offset = i_offset;
+ p_sys->b_estimate_bitrate = true;
+ p_sys->i_bitrate_avg = 0;
+ p_sys->b_big_endian = false;
-/*
- * Data reading functions
- */
+ if( stream_Seek( p_demux->s, p_sys->i_stream_offset ) )
+ {
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+
+ if( p_sys->codec.pf_init( p_demux ) )
+ {
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+
+ msg_Dbg( p_demux, "detected format %4.4s", (const char*)&p_sys->codec.i_codec );
+
+ /* Load the audio packetizer */
+ es_format_Init( &fmt, AUDIO_ES, p_sys->codec.i_codec );
+ p_sys->p_packetizer = demux_PacketizerNew( p_demux, &fmt, p_sys->codec.psz_name );
+ if( !p_sys->p_packetizer )
+ {
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+ return VLC_SUCCESS;
+}
/*****************************************************************************
- * Activate: initializes ES structures
+ * Demux: reads and demuxes data packets
+ *****************************************************************************
+ * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
*****************************************************************************/
-static int Activate( vlc_object_t * p_this )
+static int Demux( demux_t *p_demux )
{
- input_thread_t * p_input = (input_thread_t *)p_this;
- es_descriptor_t * p_es;
- byte_t * p_peek;
-
- /* Set the demux function */
- p_input->pf_demux = Demux;
+ demux_sys_t *p_sys = p_demux->p_sys;
+ block_t *p_block_in, *p_block_out;
- /* Initialize access plug-in structures. */
- if( p_input->i_mtu == 0 )
+ if( p_sys->codec.b_use_word )
{
- /* Improve speed. */
- p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE;
+ /* Make sure we are word aligned */
+ int64_t i_pos = stream_Tell( p_demux->s );
+ if( i_pos % 2 )
+ stream_Read( p_demux->s, NULL, 1 );
}
- /* Have a peep at the show. */
- if( input_Peek( p_input, &p_peek, 4 ) < 4 )
+ if( ( p_block_in = stream_Block( p_demux->s, p_sys->i_packet_size ) ) == NULL )
+ return 0;
+
+ if( p_sys->codec.b_use_word && !p_sys->b_big_endian && p_block_in->i_buffer > 0 )
{
- /* Stream shorter than 4 bytes... */
- msg_Err( p_input, "cannot peek()" );
- return( -1 );
+ /* Convert to big endian */
+ swab( p_block_in->p_buffer, p_block_in->p_buffer, p_block_in->i_buffer );
}
- if( *p_peek || *(p_peek + 1) || *(p_peek + 2) != 1 )
+ p_block_in->i_pts = p_block_in->i_dts = p_sys->b_start || p_sys->b_initial_sync_failed ? 1 : 0;
+ p_sys->b_initial_sync_failed = p_sys->b_start; /* Only try to resync once */
+
+ while( ( p_block_out = p_sys->p_packetizer->pf_packetize( p_sys->p_packetizer, &p_block_in ) ) )
{
- if( *p_input->psz_demux && !strncmp( p_input->psz_demux, "es", 3 ) )
+ p_sys->b_initial_sync_failed = false;
+ while( p_block_out )
{
- /* User forced */
- msg_Err( p_input, "this doesn't look like an MPEG ES stream, continuing" );
- }
- else
- {
- msg_Warn( p_input, "ES module discarded (no startcode)" );
- return( -1 );
+ block_t *p_next = p_block_out->p_next;
+
+ if( !p_sys->p_es )
+ {
+ p_sys->p_packetizer->fmt_out.b_packetized = true;
+ p_sys->p_es = es_out_Add( p_demux->out,
+ &p_sys->p_packetizer->fmt_out);
+
+
+ /* Try the xing header */
+ if( p_sys->xing.i_bytes && p_sys->xing.i_frames &&
+ p_sys->xing.i_frame_samples )
+ {
+ p_sys->i_bitrate_avg = p_sys->xing.i_bytes * INT64_C(8) *
+ p_sys->p_packetizer->fmt_out.audio.i_rate /
+ p_sys->xing.i_frames / p_sys->xing.i_frame_samples;
+
+ if( p_sys->i_bitrate_avg > 0 )
+ p_sys->b_estimate_bitrate = false;
+ }
+ /* Use the bitrate as initual value */
+ if( p_sys->b_estimate_bitrate )
+ p_sys->i_bitrate_avg = p_sys->p_packetizer->fmt_out.i_bitrate;
+ }
+
+ p_sys->i_pts = p_block_out->i_pts;
+
+ /* Re-estimate bitrate */
+ if( p_sys->b_estimate_bitrate && p_sys->i_pts > 1 + INT64_C(500000) )
+ p_sys->i_bitrate_avg = 8*INT64_C(1000000)*p_sys->i_bytes/(p_sys->i_pts-1);
+ p_sys->i_bytes += p_block_out->i_buffer;
+
+ /* Correct timestamp */
+ p_block_out->i_pts += p_sys->i_time_offset;
+ p_block_out->i_dts += p_sys->i_time_offset;
+
+ es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block_out->i_dts );
+
+ es_out_Send( p_demux->out, p_sys->p_es, p_block_out );
+
+ p_block_out = p_next;
}
}
- else if( *(p_peek + 3) > 0xb9 )
+
+ if( p_sys->b_initial_sync_failed )
+ msg_Dbg( p_demux, "did not sync on first block" );
+ p_sys->b_start = false;
+ return 1;
+}
+
+/*****************************************************************************
+ * Close: frees unused data
+ *****************************************************************************/
+static void Close( vlc_object_t * p_this )
+{
+ demux_t *p_demux = (demux_t*)p_this;
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ demux_PacketizerDestroy( p_sys->p_packetizer );
+ free( p_sys );
+}
+
+/*****************************************************************************
+ * Control:
+ *****************************************************************************/
+static int Control( demux_t *p_demux, int i_query, va_list args )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ int64_t *pi64;
+ bool *pb_bool;
+ int i_ret;
+ va_list args_save;
+
+ va_copy ( args_save, args );
+
+ switch( i_query )
{
- if( *p_input->psz_demux && !strncmp( p_input->psz_demux, "es", 3 ) )
- {
- /* User forced */
- msg_Err( p_input, "this seems to be a system stream (PS plug-in ?), but continuing" );
- }
- else
+ case DEMUX_HAS_UNSUPPORTED_META:
+ pb_bool = (bool*)va_arg( args, bool* );
+ *pb_bool = true;
+ return VLC_SUCCESS;
+
+ case DEMUX_GET_TIME:
+ pi64 = (int64_t*)va_arg( args, int64_t * );
+ *pi64 = p_sys->i_pts + p_sys->i_time_offset;
+ return VLC_SUCCESS;
+
+ case DEMUX_GET_LENGTH:
+ i_ret = demux_vaControlHelper( p_demux->s, p_sys->i_stream_offset, -1,
+ p_sys->i_bitrate_avg, 1, i_query,
+ args );
+ /* No bitrate, we can't have it precisely, but we can compute
+ * a raw approximation with time/position */
+ if( i_ret && !p_sys->i_bitrate_avg )
+ {
+ float f_pos = (double)(uint64_t)( stream_Tell( p_demux->s ) ) /
+ (double)(uint64_t)( stream_Size( p_demux->s ) );
+ /* The first few seconds are guaranteed to be very whacky,
+ * don't bother trying ... Too bad */
+ if( f_pos < 0.01 ||
+ (p_sys->i_pts + p_sys->i_time_offset) < 8000000 )
+ return VLC_EGENERIC;
+
+ pi64 = (int64_t *)va_arg( args_save, int64_t * );
+ *pi64 = (p_sys->i_pts + p_sys->i_time_offset) / f_pos;
+ return VLC_SUCCESS;
+ }
+ va_end( args_save );
+ return i_ret;
+
+ case DEMUX_SET_TIME:
+ /* FIXME TODO: implement a high precision seek (with mp3 parsing)
+ * needed for multi-input */
+ default:
+ i_ret = demux_vaControlHelper( p_demux->s, p_sys->i_stream_offset, -1,
+ p_sys->i_bitrate_avg, 1, i_query,
+ args );
+ if( !i_ret && p_sys->i_bitrate_avg > 0 &&
+ (i_query == DEMUX_SET_POSITION || i_query == DEMUX_SET_TIME) )
+ {
+ int64_t i_time = INT64_C(8000000) * ( stream_Tell(p_demux->s) - p_sys->i_stream_offset ) /
+ p_sys->i_bitrate_avg;
+
+ /* Fix time_offset */
+ if( i_time >= 0 )
+ p_sys->i_time_offset = i_time - p_sys->i_pts;
+ }
+ return i_ret;
+ }
+}
+
+/*****************************************************************************
+ * Mpeg I/II Audio
+ *****************************************************************************/
+static int MpgaCheckSync( const uint8_t *p_peek )
+{
+ uint32_t h = GetDWBE( p_peek );
+
+ if( ((( h >> 21 )&0x07FF) != 0x07FF ) /* header sync */
+ || (((h >> 17)&0x03) == 0 ) /* valid layer ?*/
+ || (((h >> 12)&0x0F) == 0x0F )
+ || (((h >> 12)&0x0F) == 0x00 ) /* valid bitrate ? */
+ || (((h >> 10) & 0x03) == 0x03 ) /* valide sampling freq ? */
+ || ((h & 0x03) == 0x02 )) /* valid emphasis ? */
+ {
+ return false;
+ }
+ return true;
+}
+
+#define MPGA_VERSION( h ) ( 1 - (((h)>>19)&0x01) )
+#define MPGA_MODE(h) (((h)>> 6)&0x03)
+
+static int MpgaGetFrameSamples( uint32_t h )
+{
+ const int i_layer = 3 - (((h)>>17)&0x03);
+ switch( i_layer )
+ {
+ case 0:
+ return 384;
+ case 1:
+ return 1152;
+ case 2:
+ return MPGA_VERSION(h) ? 576 : 1152;
+ default:
+ return 0;
+ }
+}
+
+static int MpgaProbe( demux_t *p_demux, int64_t *pi_offset )
+{
+ bool b_forced;
+ bool b_forced_demux;
+ int64_t i_offset;
+
+ const uint8_t *p_peek;
+
+ b_forced = demux_IsPathExtension( p_demux, ".mp3" );
+ b_forced_demux = demux_IsForced( p_demux, "mp3" ) ||
+ demux_IsForced( p_demux, "mpga" );
+
+ i_offset = stream_Tell( p_demux->s );
+ if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 )
+ return VLC_EGENERIC;
+
+ if( !MpgaCheckSync( p_peek ) )
+ {
+ bool b_ok = false;
+ int i_peek;
+
+ if( !b_forced_demux && !b_forced )
+ return VLC_EGENERIC;
+
+ i_peek = stream_Peek( p_demux->s, &p_peek, 8096 );
+ while( i_peek > 4 )
{
- msg_Warn( p_input, "ES module discarded (system startcode)" );
- return( -1 );
+ if( MpgaCheckSync( p_peek ) )
+ {
+ b_ok = true;
+ break;
+ }
+ p_peek += 1;
+ i_peek -= 1;
+ i_offset++;
}
+ if( !b_ok && !b_forced_demux )
+ return VLC_EGENERIC;
+ }
+ *pi_offset = i_offset;
+ return VLC_SUCCESS;
+}
+
+static void MpgaXingSkip( const uint8_t **pp_xing, int *pi_xing, int i_count )
+{
+ if(i_count > *pi_xing )
+ i_count = *pi_xing;
+
+ (*pp_xing) += i_count;
+ (*pi_xing) -= i_count;
+}
+
+static uint32_t MpgaXingGetDWBE( const uint8_t **pp_xing, int *pi_xing, uint32_t i_default )
+{
+ if( *pi_xing < 4 )
+ return i_default;
+
+ uint32_t v = GetDWBE( *pp_xing );
+
+ MpgaXingSkip( pp_xing, pi_xing, 4 );
+
+ return v;
+}
+
+static int MpgaInit( demux_t *p_demux )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ const uint8_t *p_peek;
+ int i_peek;
+
+ /* */
+ p_sys->i_packet_size = 1024;
+
+ /* Load a potential xing header */
+ i_peek = stream_Peek( p_demux->s, &p_peek, 4 + 1024 );
+ if( i_peek < 4 + 21 )
+ return VLC_SUCCESS;
+
+ const uint32_t header = GetDWBE( p_peek );
+ if( !MpgaCheckSync( p_peek ) )
+ return VLC_SUCCESS;
+
+ /* Xing header */
+ const uint8_t *p_xing = p_peek;
+ int i_xing = i_peek;
+ int i_skip;
+
+ if( MPGA_VERSION( header ) == 0 )
+ i_skip = MPGA_MODE( header ) != 3 ? 36 : 21;
+ else
+ i_skip = MPGA_MODE( header ) != 3 ? 21 : 13;
+
+ if( i_skip + 8 >= i_xing || memcmp( &p_xing[i_skip], "Xing", 4 ) )
+ return VLC_SUCCESS;
+
+ const uint32_t i_flags = GetDWBE( &p_xing[i_skip+4] );
+
+ MpgaXingSkip( &p_xing, &i_xing, i_skip + 8 );
+
+ if( i_flags&0x01 )
+ p_sys->xing.i_frames = MpgaXingGetDWBE( &p_xing, &i_xing, 0 );
+ if( i_flags&0x02 )
+ p_sys->xing.i_bytes = MpgaXingGetDWBE( &p_xing, &i_xing, 0 );
+ if( i_flags&0x04 ) /* TODO Support XING TOC to improve seeking accuracy */
+ MpgaXingSkip( &p_xing, &i_xing, 100 );
+ if( i_flags&0x08 )
+ {
+ /* FIXME: doesn't return the right bitrage average, at least
+ with some MP3's */
+ p_sys->xing.i_bitrate_avg = MpgaXingGetDWBE( &p_xing, &i_xing, 0 );
+ msg_Dbg( p_demux, "xing vbr value present (%d)",
+ p_sys->xing.i_bitrate_avg );
}
- if( input_InitStream( p_input, 0 ) == -1 )
+ if( p_sys->xing.i_frames > 0 && p_sys->xing.i_bytes > 0 )
{
- return( -1 );
+ p_sys->xing.i_frame_samples = MpgaGetFrameSamples( header );
+ msg_Dbg( p_demux, "xing frames&bytes value present "
+ "(%d bytes, %d frames, %d samples/frame)",
+ p_sys->xing.i_bytes, p_sys->xing.i_frames,
+ p_sys->xing.i_frame_samples );
}
- 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,
- VIDEO_ES, NULL, 0 );
- p_es->i_stream_id = 0xE0;
- p_es->i_fourcc = VLC_FOURCC('m','p','g','v');
- 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 VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * AAC
+ *****************************************************************************/
+static int AacProbe( demux_t *p_demux, int64_t *pi_offset )
+{
+ bool b_forced;
+ bool b_forced_demux;
+
+ int64_t i_offset;
+ const uint8_t *p_peek;
+
+ b_forced = demux_IsPathExtension( p_demux, ".aac" ) ||
+ demux_IsPathExtension( p_demux, ".aacp" );
+ b_forced_demux = demux_IsForced( p_demux, "m4a" ) ||
+ demux_IsForced( p_demux, "aac" ) ||
+ demux_IsForced( p_demux, "mp4a" );
+
+ if( !b_forced_demux && !b_forced )
+ return VLC_EGENERIC;
+
+ i_offset = stream_Tell( p_demux->s );
+
+ /* peek the begining (10 is for adts header) */
+ if( stream_Peek( p_demux->s, &p_peek, 10 ) < 10 )
+ {
+ msg_Err( p_demux, "cannot peek" );
+ return VLC_EGENERIC;
+ }
+ if( !strncmp( (char *)p_peek, "ADIF", 4 ) )
+ {
+ msg_Err( p_demux, "ADIF file. Not yet supported. (Please report)" );
+ return VLC_EGENERIC;
+ }
+
+ *pi_offset = i_offset;
+ return VLC_SUCCESS;
+}
+static int AacInit( demux_t *p_demux )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ p_sys->i_packet_size = 4096;
- return( 0 );
+ return VLC_SUCCESS;
}
/*****************************************************************************
- * Demux: reads and demuxes data packets
- *****************************************************************************
- * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
+ * Wav header skipper
*****************************************************************************/
-static int Demux( input_thread_t * p_input )
+#define WAV_PROBE_SIZE (512*1024)
+static int WavSkipHeader( demux_t *p_demux, int *pi_skip )
{
- 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;
+ const uint8_t *p_peek;
+ int i_peek = 0;
+
+ /* */
+ *pi_skip = 0;
+
+ /* Check if we are dealing with a WAV file */
+ if( stream_Peek( p_demux->s, &p_peek, 12+8 ) != 12 + 8 )
+ return VLC_SUCCESS;
+
+ if( memcmp( p_peek, "RIFF", 4 ) || memcmp( &p_peek[8], "WAVE", 4 ) )
+ return VLC_SUCCESS;
- if( p_fifo == NULL )
+ /* Find the wave format header */
+ i_peek = 12 + 8;
+ while( memcmp( p_peek + i_peek - 8, "fmt ", 4 ) )
{
- return -1;
+ uint32_t i_len = GetDWLE( p_peek + i_peek - 4 );
+ if( i_len > WAV_PROBE_SIZE || i_peek + i_len > WAV_PROBE_SIZE )
+ return VLC_EGENERIC;
+
+ i_peek += i_len + 8;
+ if( stream_Peek( p_demux->s, &p_peek, i_peek ) != i_peek )
+ return VLC_EGENERIC;
}
- i_read = input_SplitBuffer( p_input, &p_data, ES_PACKET_SIZE );
+ /* Sanity check the wave format header */
+ uint32_t i_len = GetDWLE( p_peek + i_peek - 4 );
+ if( i_len > WAV_PROBE_SIZE )
+ return VLC_EGENERIC;
- if ( i_read <= 0 )
+ i_peek += i_len + 8;
+ if( stream_Peek( p_demux->s, &p_peek, i_peek ) != i_peek )
+ return VLC_EGENERIC;
+ if( GetWLE( p_peek + i_peek - i_len - 8 /* wFormatTag */ ) !=
+ 1 /* WAVE_FORMAT_PCM */ )
+ return VLC_EGENERIC;
+ if( GetWLE( p_peek + i_peek - i_len - 6 /* nChannels */ ) != 2 )
+ return VLC_EGENERIC;
+ if( GetDWLE( p_peek + i_peek - i_len - 4 /* nSamplesPerSec */ ) !=
+ 44100 )
+ return VLC_EGENERIC;
+
+ /* Skip the wave header */
+ while( memcmp( p_peek + i_peek - 8, "data", 4 ) )
{
- return i_read;
+ uint32_t i_len = GetDWLE( p_peek + i_peek - 4 );
+ if( i_len > WAV_PROBE_SIZE || i_peek + i_len > WAV_PROBE_SIZE )
+ return VLC_EGENERIC;
+
+ i_peek += i_len + 8;
+ if( stream_Peek( p_demux->s, &p_peek, i_peek ) != i_peek )
+ return VLC_EGENERIC;
}
+ *pi_skip = i_peek;
+ return VLC_SUCCESS;
+}
+
+static int GenericProbe( demux_t *p_demux, int64_t *pi_offset,
+ const char * ppsz_name[],
+ int (*pf_check)( const uint8_t * ), int i_check_size )
+{
+ bool b_forced_demux;
- p_pes = input_NewPES( p_input->p_method_data );
+ int64_t i_offset;
+ const uint8_t *p_peek;
+ int i_skip;
- if( p_pes == NULL )
+ b_forced_demux = false;
+ for( int i = 0; ppsz_name[i] != NULL; i++ )
{
- msg_Err( p_input, "out of memory" );
- input_DeletePacket( p_input->p_method_data, p_data );
- return -1;
+ b_forced_demux |= demux_IsForced( p_demux, ppsz_name[i] );
+ }
+
+ i_offset = stream_Tell( p_demux->s );
+
+ if( WavSkipHeader( p_demux, &i_skip ) )
+ {
+ if( !b_forced_demux )
+ return VLC_EGENERIC;
+ }
+ const bool b_wav = i_skip > 0;
+
+ /* peek the begining
+ * It is common that wav files have some sort of garbage at the begining */
+ const int i_probe = i_skip + i_check_size + ( b_wav ? 16000 : 0);
+ const int i_peek = stream_Peek( p_demux->s, &p_peek, i_probe );
+ if( i_peek < i_skip + i_check_size )
+ {
+ msg_Err( p_demux, "cannot peek" );
+ return VLC_EGENERIC;
+ }
+ for( ;; )
+ {
+ if( i_skip + i_check_size > i_peek )
+ {
+ if( !b_forced_demux )
+ return VLC_EGENERIC;
+ break;
+ }
+ const int i_size = pf_check( &p_peek[i_skip] );
+ if( i_size >= 0 )
+ {
+ if( i_size == 0 || 1)
+ break;
+
+ /* If we have the frame size, check the next frame for
+ * extra robustness */
+ if( i_skip + i_check_size + i_size <= i_peek )
+ {
+ if( pf_check( &p_peek[i_skip+i_size] ) >= 0 )
+ break;
+ }
+ }
+ i_skip++;
+ }
+
+ *pi_offset = i_offset + i_skip;
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * A52
+ *****************************************************************************/
+static int A52CheckSync( const uint8_t *p_peek, bool *p_big_endian, bool b_eac3 )
+{
+ vlc_a52_header_t header;
+ uint8_t p_tmp[VLC_A52_HEADER_SIZE];
+
+ *p_big_endian = p_peek[0] == 0x0b && p_peek[1] == 0x77;
+ if( !*p_big_endian )
+ {
+ swab( p_peek, p_tmp, VLC_A52_HEADER_SIZE );
+ p_peek = p_tmp;
}
- 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;
+ if( vlc_a52_header_Parse( &header, p_peek, VLC_A52_HEADER_SIZE ) )
+ return VLC_EGENERIC;
- vlc_mutex_lock( &p_fifo->data_lock );
+ if( !header.b_eac3 != !b_eac3 )
+ return VLC_EGENERIC;
+ return header.i_size;
+}
+static int EA52CheckSyncProbe( const uint8_t *p_peek )
+{
+ bool b_dummy;
+ return A52CheckSync( p_peek, &b_dummy, true );
+}
+
+static int EA52Probe( demux_t *p_demux, int64_t *pi_offset )
+{
+ const char *ppsz_name[] = { "eac3", NULL };
+
+ return GenericProbe( p_demux, pi_offset, ppsz_name, EA52CheckSyncProbe, VLC_A52_HEADER_SIZE );
+}
- if( p_fifo->i_depth >= MAX_PACKETS_IN_FIFO )
+static int A52CheckSyncProbe( const uint8_t *p_peek )
+{
+ bool b_dummy;
+ return A52CheckSync( p_peek, &b_dummy, false );
+}
+
+static int A52Probe( demux_t *p_demux, int64_t *pi_offset )
+{
+ const char *ppsz_name[] = { "a52", "ac3", NULL };
+
+ return GenericProbe( p_demux, pi_offset, ppsz_name, A52CheckSyncProbe, VLC_A52_HEADER_SIZE );
+}
+
+static int A52Init( demux_t *p_demux )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ p_sys->b_big_endian = false;
+ p_sys->i_packet_size = 1024;
+
+ const uint8_t *p_peek;
+
+ /* peek the begining */
+ if( stream_Peek( p_demux->s, &p_peek, VLC_A52_HEADER_SIZE ) >= VLC_A52_HEADER_SIZE )
{
- /* Wait for the decoder. */
- vlc_cond_wait( &p_fifo->data_wait, &p_fifo->data_lock );
+ A52CheckSync( p_peek, &p_sys->b_big_endian, true );
}
- vlc_mutex_unlock( &p_fifo->data_lock );
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * DTS
+ *****************************************************************************/
+static int DtsCheckSync( const uint8_t *p_peek )
+{
+ /* TODO return frame size for robustness */
- 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) )
+ /* 14 bits, little endian version of the bitstream */
+ if( p_peek[0] == 0xff && p_peek[1] == 0x1f &&
+ p_peek[2] == 0x00 && p_peek[3] == 0xe8 &&
+ (p_peek[4] & 0xf0) == 0xf0 && p_peek[5] == 0x07 )
{
- msg_Warn( p_input, "synchro reinit" );
- p_pes->i_pts = mdate() + DEFAULT_PTS_DELAY;
- p_input->stream.p_selected_program->i_synchro_state = SYNCHRO_OK;
+ return 0;
+ }
+ /* 14 bits, big endian version of the bitstream */
+ else if( p_peek[0] == 0x1f && p_peek[1] == 0xff &&
+ p_peek[2] == 0xe8 && p_peek[3] == 0x00 &&
+ p_peek[4] == 0x07 && (p_peek[5] & 0xf0) == 0xf0)
+ {
+ return 0;
+ }
+ /* 16 bits, big endian version of the bitstream */
+ else if( p_peek[0] == 0x7f && p_peek[1] == 0xfe &&
+ p_peek[2] == 0x80 && p_peek[3] == 0x01 )
+ {
+ return 0;
+ }
+ /* 16 bits, little endian version of the bitstream */
+ else if( p_peek[0] == 0xfe && p_peek[1] == 0x7f &&
+ p_peek[2] == 0x01 && p_peek[3] == 0x80 )
+ {
+ return 0;
}
- input_DecodePES( p_fifo, p_pes );
+ return VLC_EGENERIC;
+}
- return 1;
+static int DtsProbe( demux_t *p_demux, int64_t *pi_offset )
+{
+ const char *ppsz_name[] = { "dts", NULL };
+
+ return GenericProbe( p_demux, pi_offset, ppsz_name, DtsCheckSync, 11 );
+}
+static int DtsInit( demux_t *p_demux )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ p_sys->i_packet_size = 16384;
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * MLP
+ *****************************************************************************/
+static int MlpCheckSync( const uint8_t *p_peek )
+{
+ if( p_peek[4+0] != 0xf8 || p_peek[4+1] != 0x72 || p_peek[4+2] != 0x6f )
+ return -1;
+
+ if( p_peek[4+3] != 0xba && p_peek[4+3] != 0xbb )
+ return -1;
+
+ /* TODO checksum and real size for robustness */
+ return 0;
+}
+static int MlpProbe( demux_t *p_demux, int64_t *pi_offset )
+{
+ const char *ppsz_name[] = { "mlp", NULL };
+
+ return GenericProbe( p_demux, pi_offset, ppsz_name, MlpCheckSync, 4+28+16*4 );
+}
+static int MlpInit( demux_t *p_demux )
+
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ p_sys->i_packet_size = 4096;
+
+ return VLC_SUCCESS;
}
projects / vlc / blobdiff