X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=modules%2Fdemux%2Fdts.c;h=d448e07a1c176533e8723b34708488fc81955d88;hb=b21c2478cb97450779ae79577eb9778f5f3aa892;hp=77e40eb4718d742258bb649596dafbc8c5d5c1ce;hpb=a1fc3b9fcf187db72eb1c43dd418e2b0abe18d2e;p=vlc diff --git a/modules/demux/dts.c b/modules/demux/dts.c index 77e40eb471..d448e07a1c 100644 --- a/modules/demux/dts.c +++ b/modules/demux/dts.c @@ -1,8 +1,8 @@ /***************************************************************************** * dts.c : raw DTS stream input module for vlc ***************************************************************************** - * Copyright (C) 2001 VideoLAN - * $Id: dts.c,v 1.3 2004/02/03 08:16:16 gbazin Exp $ + * Copyright (C) 2001-2007 the VideoLAN team + * $Id$ * * Authors: Gildas Bazin * @@ -18,25 +18,36 @@ * * 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 -#include +#include #include -#define DTS_PACKET_SIZE 16384 -#define DTS_MAX_HEADER_SIZE 11 - /***************************************************************************** - * Local prototypes + * Module descriptor *****************************************************************************/ static int Open ( vlc_object_t * ); static void Close ( vlc_object_t * ); -static int Demux ( input_thread_t * ); + +vlc_module_begin(); + set_category( CAT_INPUT ); + set_subcategory( SUBCAT_INPUT_DEMUX ); + set_description( _("Raw DTS demuxer") ); + set_capability( "demux2", 155 ); + set_callbacks( Open, Close ); + add_shortcut( "dts" ); +vlc_module_end(); + +/***************************************************************************** + * Local prototypes + *****************************************************************************/ +static int Demux ( demux_t * ); +static int Control( demux_t *, int, va_list ); struct demux_sys_t { @@ -45,127 +56,104 @@ struct demux_sys_t /* Packetizer */ decoder_t *p_packetizer; + + int i_mux_rate; }; -/***************************************************************************** - * Module descriptor - *****************************************************************************/ -vlc_module_begin(); - set_description( _("Raw DTS demuxer") ); - set_capability( "demux", 155 ); - set_callbacks( Open, Close ); - add_shortcut( "dts" ); -vlc_module_end(); +static int CheckSync( const uint8_t *p_peek ); + +#define DTS_PACKET_SIZE 16384 +#define DTS_PROBE_SIZE (DTS_PACKET_SIZE * 4) +#define DTS_MAX_HEADER_SIZE 11 /***************************************************************************** * Open: initializes ES structures *****************************************************************************/ static int Open( vlc_object_t * p_this ) { - input_thread_t *p_input = (input_thread_t *)p_this; - demux_sys_t *p_sys; - byte_t * p_peek; - int i_peek = 0; - - p_input->pf_demux = Demux; - p_input->pf_demux_control = demux_vaControlDefault; - p_input->pf_rewind = NULL; + demux_t *p_demux = (demux_t*)p_this; + demux_sys_t *p_sys; + const byte_t *p_peek; + int i_peek = 0; /* Check if we are dealing with a WAV file */ - if( input_Peek( p_input, &p_peek, 12 ) == 12 && - !strncmp( p_peek, "RIFF", 4 ) && !strncmp( &p_peek[8], "WAVE", 4 ) ) + if( stream_Peek( p_demux->s, &p_peek, 20 ) == 20 && + !memcmp( p_peek, "RIFF", 4 ) && !memcmp( &p_peek[8], "WAVE", 4 ) ) { - /* Skip the wave header */ - i_peek = 12 + 8; - while( input_Peek( p_input, &p_peek, i_peek ) == i_peek && - strncmp( p_peek + i_peek - 8, "data", 4 ) ) + int i_size; + + /* Find the wave format header */ + i_peek = 20; + while( memcmp( p_peek + i_peek - 8, "fmt ", 4 ) ) { - i_peek += GetDWLE( p_peek + i_peek - 4 ) + 8; + i_size = GetDWLE( p_peek + i_peek - 4 ); + if( i_size + i_peek > DTS_PROBE_SIZE ) return VLC_EGENERIC; + i_peek += i_size + 8; + + if( stream_Peek( p_demux->s, &p_peek, i_peek ) != i_peek ) + return VLC_EGENERIC; } - } - /* Have a peep at the show. */ - if( input_Peek( p_input, &p_peek, i_peek + DTS_MAX_HEADER_SIZE ) < - i_peek + DTS_MAX_HEADER_SIZE ) - { - /* Stream too short */ - msg_Err( p_input, "cannot peek()" ); - return VLC_EGENERIC; - } + /* Sanity check the wave format header */ + i_size = GetDWLE( p_peek + i_peek - 4 ); + if( i_size + i_peek > DTS_PROBE_SIZE ) return VLC_EGENERIC; + i_peek += i_size + 8; + if( stream_Peek( p_demux->s, &p_peek, i_peek ) != i_peek ) + return VLC_EGENERIC; + if( GetWLE( p_peek + i_peek - i_size - 8 /* wFormatTag */ ) != + 1 /* WAVE_FORMAT_PCM */ ) + return VLC_EGENERIC; + if( GetWLE( p_peek + i_peek - i_size - 6 /* nChannels */ ) != 2 ) + return VLC_EGENERIC; + if( GetDWLE( p_peek + i_peek - i_size - 4 /* nSamplesPerSec */ ) != + 44100 ) + return VLC_EGENERIC; - /* 14 bits, little endian version of the bitstream */ - if( p_peek[i_peek + 0] == 0xff && p_peek[i_peek + 1] == 0x1f && - p_peek[i_peek + 2] == 0x00 && p_peek[i_peek + 3] == 0xe8 && - (p_peek[i_peek + 4] & 0xf0) == 0xf0 && p_peek[i_peek + 5] == 0x07 ) - { - } - /* 14 bits, big endian version of the bitstream */ - else if( p_peek[i_peek + 0] == 0x1f && p_peek[i_peek + 1] == 0xff && - p_peek[i_peek + 2] == 0xe8 && p_peek[i_peek + 3] == 0x00 && - p_peek[i_peek + 4] == 0x07 && (p_peek[i_peek + 5] & 0xf0) == 0xf0) - { - } - /* 16 bits, big endian version of the bitstream */ - else if( p_peek[i_peek + 0] == 0x7f && p_peek[i_peek + 1] == 0xfe && - p_peek[i_peek + 2] == 0x80 && p_peek[i_peek + 3] == 0x01 ) - { - } - /* 16 bits, little endian version of the bitstream */ - else if( p_peek[i_peek + 0] == 0xfe && p_peek[i_peek + 1] == 0x7f && - p_peek[i_peek + 2] == 0x01 && p_peek[i_peek + 3] == 0x80 ) - { - } - else - { - if( p_input->psz_demux && !strncmp( p_input->psz_demux, "dts", 3 ) ) + /* Skip the wave header */ + while( memcmp( p_peek + i_peek - 8, "data", 4 ) ) { - /* User forced */ - msg_Err( p_input, "this doesn't look like a DTS audio stream, " - "continuing anyway" ); + i_size = GetDWLE( p_peek + i_peek - 4 ); + if( i_size + i_peek > DTS_PROBE_SIZE ) return VLC_EGENERIC; + i_peek += i_size + 8; + + if( stream_Peek( p_demux->s, &p_peek, i_peek ) != i_peek ) + return VLC_EGENERIC; } - else + + /* Some DTS wav files don't begin with a sync code so we do a more + * extensive search */ + i_size = stream_Peek( p_demux->s, &p_peek, DTS_PROBE_SIZE ); + i_size -= DTS_MAX_HEADER_SIZE; + + while( i_peek < i_size ) { - return VLC_EGENERIC; + if( CheckSync( p_peek + i_peek ) != VLC_SUCCESS ) + /* The data is stored in 16 bits words */ + i_peek += 2; + else + break; } } - p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) ); - p_sys->b_start = VLC_TRUE; - - /* - * Load the DTS packetizer - */ - p_sys->p_packetizer = vlc_object_create( p_input, VLC_OBJECT_DECODER ); - p_sys->p_packetizer->pf_decode_audio = 0; - p_sys->p_packetizer->pf_decode_video = 0; - p_sys->p_packetizer->pf_decode_sub = 0; - p_sys->p_packetizer->pf_packetize = 0; - - /* Initialization of decoder structure */ - es_format_Init( &p_sys->p_packetizer->fmt_in, AUDIO_ES, - VLC_FOURCC( 'd', 't', 's', ' ' ) ); - - p_sys->p_packetizer->p_module = - module_Need( p_sys->p_packetizer, "packetizer", NULL ); - if( !p_sys->p_packetizer->p_module ) - { - msg_Err( p_input, "cannot find DTS packetizer" ); - return VLC_EGENERIC; - } + /* Have a peep at the show. */ + CHECK_PEEK( p_peek, i_peek + DTS_MAX_HEADER_SIZE * 2 ); - /* Create one program */ - vlc_mutex_lock( &p_input->stream.stream_lock ); - if( input_InitStream( p_input, 0 ) == -1 ) + if( CheckSync( p_peek + i_peek ) != VLC_SUCCESS ) { - vlc_mutex_unlock( &p_input->stream.stream_lock ); - msg_Err( p_input, "cannot init stream" ); - return VLC_EGENERIC; + if( !p_demux->b_force ) + return VLC_EGENERIC; + + /* User forced */ + msg_Err( p_demux, "this doesn't look like a DTS audio stream, " + "continuing anyway" ); } - p_input->stream.i_mux_rate = 0; - vlc_mutex_unlock( &p_input->stream.stream_lock ); - p_sys->p_es = - es_out_Add( p_input->p_es_out, &p_sys->p_packetizer->fmt_in ); + DEMUX_INIT_COMMON(); p_sys = p_demux->p_sys; + + INIT_APACKETIZER( p_sys->p_packetizer, 'd','t','s',' ' ); + LOAD_PACKETIZER_OR_FAIL( p_sys->p_packetizer, "DTS" ); + + p_sys->p_es = es_out_Add( p_demux->out, &p_sys->p_packetizer->fmt_in ); return VLC_SUCCESS; } @@ -173,16 +161,12 @@ static int Open( vlc_object_t * p_this ) /***************************************************************************** * Close: frees unused data *****************************************************************************/ -static void Close( vlc_object_t * p_this ) +static void Close( vlc_object_t *p_this ) { - input_thread_t *p_input = (input_thread_t*)p_this; - demux_sys_t *p_sys = p_input->p_demux_data; + demux_t *p_demux = (demux_t*)p_this; + demux_sys_t *p_sys = p_demux->p_sys; - /* Unneed module */ - module_Unneed( p_sys->p_packetizer, p_sys->p_packetizer->p_module ); - - /* Delete the decoder */ - vlc_object_destroy( p_sys->p_packetizer ); + DESTROY_PACKETIZER( p_sys->p_packetizer ); free( p_sys ); } @@ -192,43 +176,41 @@ static void Close( vlc_object_t * p_this ) ***************************************************************************** * Returns -1 in case of error, 0 in case of EOF, 1 otherwise *****************************************************************************/ -static int Demux( input_thread_t * p_input ) +static int Demux( demux_t *p_demux ) { - demux_sys_t *p_sys = p_input->p_demux_data; + demux_sys_t *p_sys = p_demux->p_sys; block_t *p_block_in, *p_block_out; - if( !( p_block_in = stream_Block( p_input->s, DTS_PACKET_SIZE ) ) ) + if( !( p_block_in = stream_Block( p_demux->s, DTS_PACKET_SIZE ) ) ) { return 0; } if( p_sys->b_start ) - { p_block_in->i_pts = p_block_in->i_dts = 1; - p_sys->b_start = VLC_FALSE; - } else - { p_block_in->i_pts = p_block_in->i_dts = 0; - } while( (p_block_out = p_sys->p_packetizer->pf_packetize( p_sys->p_packetizer, &p_block_in )) ) { + p_sys->b_start = VLC_FALSE; + while( p_block_out ) { block_t *p_next = p_block_out->p_next; - input_ClockManageRef( p_input, - p_input->stream.p_selected_program, - p_block_out->i_pts * 9 / 100 ); + /* We assume a constant bitrate */ + if( p_block_out->i_length ) + { + p_sys->i_mux_rate = + p_block_out->i_buffer * I64C(1000000) / p_block_out->i_length; + } - p_block_in->b_discontinuity = 0; - p_block_out->i_dts = p_block_out->i_pts = - input_ClockGetTS( p_input, p_input->stream.p_selected_program, - p_block_out->i_pts * 9 / 100 ); + /* set PCR */ + es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block_out->i_dts ); - es_out_Send( p_input->p_es_out, p_sys->p_es, p_block_out ); + es_out_Send( p_demux->out, p_sys->p_es, p_block_out ); p_block_out = p_next; } @@ -236,3 +218,53 @@ static int Demux( input_thread_t * p_input ) return 1; } + +/***************************************************************************** + * Control: + *****************************************************************************/ +static int Control( demux_t *p_demux, int i_query, va_list args ) +{ + demux_sys_t *p_sys = p_demux->p_sys; + if( i_query == DEMUX_SET_TIME ) + return VLC_EGENERIC; + else + return demux2_vaControlHelper( p_demux->s, + 0, -1, + 8*p_sys->i_mux_rate, 1, i_query, args ); +} + +/***************************************************************************** + * CheckSync: Check if buffer starts with a DTS sync code + *****************************************************************************/ +static int CheckSync( const uint8_t *p_peek ) +{ + /* 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 ) + { + return VLC_SUCCESS; + } + /* 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 VLC_SUCCESS; + } + /* 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 VLC_SUCCESS; + } + /* 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 VLC_SUCCESS; + } + + return VLC_EGENERIC; +} +