--- /dev/null
+/*****************************************************************************
+ * rawdv.c : raw dv input module for vlc
+ *****************************************************************************
+ * Copyright (C) 2001 VideoLAN
+ * $Id: rawdv.c,v 1.1 2002/12/17 21:15:43 gbazin 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;
+
+ 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 * );
+
+static uint32_t GetDWBE( uint8_t *p_buff )
+{
+ return (uint32_t)p_buff[3] | ( ((uint32_t)p_buff[2]) << 8 ) |
+ ( ((uint32_t)p_buff[1]) << 16 ) | ( ((uint32_t)p_buff[0]) << 24 );
+}
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin();
+ set_description( _("raw dv demux") );
+ 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;
+ 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( strcasecmp( psz_ext, ".dv") &&
+ ( !p_input->psz_demux || strcmp(p_input->psz_demux, "rawdv") ) )
+ {
+ return -1;
+ }
+
+ p_input->pf_demux = Demux;
+
+ /* 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;
+ }
+
+ /* 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_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;
+ }
+
+ /* 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, 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->i_cat = VIDEO_ES;
+ p_rawdv->p_video_es->p_demux_data = (void *)p_rawdv->p_bih;
+ input_SelectES( p_input, p_rawdv->p_video_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 );
+ 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;
+ 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;
+ ssize_t i_read;
+
+ if( p_fifo == NULL )
+ {
+ return -1;
+ }
+
+ 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;
+ }
+
+ 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 );
+
+ input_DecodePES( p_fifo, p_pes );
+
+ p_rawdv->i_pcr += ( 90000 / p_rawdv->f_rate );
+
+ return 1;
+}
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