ogg.c
上传用户:riyaled888
上传日期:2009-03-27
资源大小:7338k
文件大小:32k
- /*****************************************************************************
- * ogg.c: ogg muxer module for vlc
- *****************************************************************************
- * Copyright (C) 2001, 2002 VideoLAN
- * $Id: ogg.c 8566 2004-08-29 11:42:43Z gbazin $
- *
- * 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
- * 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>
- #include <string.h>
- #ifdef HAVE_TIME_H
- # include <time.h>
- #endif
- #include <vlc/vlc.h>
- #include <vlc/input.h>
- #include <vlc/sout.h>
- #include "codecs.h"
- #include <ogg/ogg.h>
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Open ( vlc_object_t * );
- static void Close ( vlc_object_t * );
- vlc_module_begin();
- set_description( _("Ogg/ogm muxer") );
- set_capability( "sout mux", 10 );
- add_shortcut( "ogg" );
- add_shortcut( "ogm" );
- set_callbacks( Open, Close );
- vlc_module_end();
- /*****************************************************************************
- * Exported prototypes
- *****************************************************************************/
- static int Control ( sout_mux_t *, int, va_list );
- static int AddStream( sout_mux_t *, sout_input_t * );
- static int DelStream( sout_mux_t *, sout_input_t * );
- static int Mux ( sout_mux_t * );
- static int MuxBlock ( sout_mux_t *, sout_input_t * );
- static block_t *OggCreateHeader( sout_mux_t *, mtime_t );
- static block_t *OggCreateFooter( sout_mux_t *, mtime_t );
- /*****************************************************************************
- * Misc declarations
- *****************************************************************************/
- #define FREE( p ) if( p ) { free( p ); (p) = NULL; }
- /* Structures used for OggDS headers used in ogm files */
- #define PACKET_TYPE_HEADER 0x01
- #define PACKET_TYPE_COMMENT 0x03
- #define PACKET_IS_SYNCPOINT 0x08
- typedef struct
- #ifdef HAVE_ATTRIBUTE_PACKED
- __attribute__((__packed__))
- #endif
- {
- int32_t i_width;
- int32_t i_height;
- } oggds_header_video_t;
- typedef struct
- #ifdef HAVE_ATTRIBUTE_PACKED
- __attribute__((__packed__))
- #endif
- {
- int16_t i_channels;
- int16_t i_block_align;
- int32_t i_avgbytespersec;
- } oggds_header_audio_t;
- typedef struct
- #ifdef HAVE_ATTRIBUTE_PACKED
- __attribute__((__packed__))
- #endif
- {
- uint8_t i_packet_type;
- char stream_type[8];
- char sub_type[4];
- int32_t i_size;
- int64_t i_time_unit;
- int64_t i_samples_per_unit;
- int32_t i_default_len;
- int32_t i_buffer_size;
- int16_t i_bits_per_sample;
- int16_t i_padding_0; /* Because the original is using MSVC packing style */
- union
- {
- oggds_header_video_t video;
- oggds_header_audio_t audio;
- } header;
- int32_t i_padding_1; /* Because the original is using MSVC packing style */
- } oggds_header_t;
- /*
- * TODO move this function to src/stream_output.c (used by nearly all muxers)
- */
- static int MuxGetStream( sout_mux_t *p_mux, int *pi_stream, mtime_t *pi_dts )
- {
- mtime_t i_dts;
- int i_stream;
- int i;
- for( i = 0, i_dts = 0, i_stream = -1; i < p_mux->i_nb_inputs; i++ )
- {
- block_fifo_t *p_fifo;
- p_fifo = p_mux->pp_inputs[i]->p_fifo;
- /* We don't really need to have anything in the SPU fifo */
- if( p_mux->pp_inputs[i]->p_fmt->i_cat == SPU_ES &&
- p_fifo->i_depth == 0 ) continue;
- if( p_fifo->i_depth )
- {
- block_t *p_buf;
- p_buf = block_FifoShow( p_fifo );
- if( i_stream < 0 || p_buf->i_dts < i_dts )
- {
- i_dts = p_buf->i_dts;
- i_stream = i;
- }
- }
- else return -1;
- }
- if( pi_stream ) *pi_stream = i_stream;
- if( pi_dts ) *pi_dts = i_dts;
- return i_stream;
- }
- /*****************************************************************************
- * Definitions of structures and functions used by this plugins
- *****************************************************************************/
- typedef struct
- {
- int i_cat;
- int i_fourcc;
- int b_new;
- mtime_t i_dts;
- mtime_t i_length;
- int i_packet_no;
- int i_serial_no;
- int i_keyframe_granule_shift; /* Theora only */
- ogg_stream_state os;
- oggds_header_t *p_oggds_header;
- } ogg_stream_t;
- struct sout_mux_sys_t
- {
- int i_streams;
- mtime_t i_start_dts;
- int i_next_serial_no;
- /* number of logical streams pending to be added */
- int i_add_streams;
- /* logical streams pending to be deleted */
- int i_del_streams;
- ogg_stream_t **pp_del_streams;
- };
- static void OggSetDate( block_t *, mtime_t , mtime_t );
- static block_t *OggStreamFlush( sout_mux_t *, ogg_stream_state *, mtime_t );
- /*****************************************************************************
- * Open: Open muxer
- *****************************************************************************/
- static int Open( vlc_object_t *p_this )
- {
- sout_mux_t *p_mux = (sout_mux_t*)p_this;
- sout_mux_sys_t *p_sys;
- msg_Info( p_mux, "Open" );
- p_sys = malloc( sizeof( sout_mux_sys_t ) );
- p_sys->i_streams = 0;
- p_sys->i_add_streams = 0;
- p_sys->i_del_streams = 0;
- p_sys->pp_del_streams = 0;
- p_mux->p_sys = p_sys;
- p_mux->pf_control = Control;
- p_mux->pf_addstream = AddStream;
- p_mux->pf_delstream = DelStream;
- p_mux->pf_mux = Mux;
- /* First serial number is random.
- * (Done like this because on win32 you need to seed the random number
- * generator once per thread). */
- srand( (unsigned int)time( NULL ) );
- p_sys->i_next_serial_no = rand();
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Close: Finalize ogg bitstream and close muxer
- *****************************************************************************/
- static void Close( vlc_object_t * p_this )
- {
- sout_mux_t *p_mux = (sout_mux_t*)p_this;
- sout_mux_sys_t *p_sys = p_mux->p_sys;
- msg_Info( p_mux, "Close" );
- if( p_sys->i_del_streams )
- {
- block_t *p_og = NULL;
- mtime_t i_dts = -1;
- int i;
- /* Close the current ogg stream */
- msg_Dbg( p_mux, "writing footer" );
- block_ChainAppend( &p_og, OggCreateFooter( p_mux, 0 ) );
- /* Remove deleted logical streams */
- for( i = 0; i < p_sys->i_del_streams; i++ )
- {
- i_dts = p_sys->pp_del_streams[i]->i_dts;
- ogg_stream_clear( &p_sys->pp_del_streams[i]->os );
- FREE( p_sys->pp_del_streams[i]->p_oggds_header );
- FREE( p_sys->pp_del_streams[i] );
- }
- FREE( p_sys->pp_del_streams );
- p_sys->i_streams -= p_sys->i_del_streams;
- /* Write footer */
- OggSetDate( p_og, i_dts, 0 );
- sout_AccessOutWrite( p_mux->p_access, p_og );
- }
- free( p_sys );
- }
- /*****************************************************************************
- * Control:
- *****************************************************************************/
- static int Control( sout_mux_t *p_mux, int i_query, va_list args )
- {
- vlc_bool_t *pb_bool;
- char **ppsz;
- switch( i_query )
- {
- case MUX_CAN_ADD_STREAM_WHILE_MUXING:
- pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
- *pb_bool = VLC_TRUE;
- return VLC_SUCCESS;
- case MUX_GET_ADD_STREAM_WAIT:
- pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
- *pb_bool = VLC_TRUE;
- return VLC_SUCCESS;
- case MUX_GET_MIME:
- ppsz = (char**)va_arg( args, char ** );
- *ppsz = strdup( "application/ogg" );
- return VLC_SUCCESS;
- default:
- return VLC_EGENERIC;
- }
- }
- /*****************************************************************************
- * AddStream: Add an elementary stream to the muxed stream
- *****************************************************************************/
- static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
- {
- sout_mux_sys_t *p_sys = p_mux->p_sys;
- ogg_stream_t *p_stream;
- uint16_t i_tag;
- msg_Dbg( p_mux, "adding input" );
- p_input->p_sys = p_stream = malloc( sizeof( ogg_stream_t ) );
- p_stream->i_cat = p_input->p_fmt->i_cat;
- p_stream->i_fourcc = p_input->p_fmt->i_codec;
- p_stream->i_serial_no = p_sys->i_next_serial_no++;
- p_stream->i_packet_no = 0;
- p_stream->p_oggds_header = 0;
- switch( p_input->p_fmt->i_cat )
- {
- case VIDEO_ES:
- if( !p_input->p_fmt->video.i_frame_rate ||
- !p_input->p_fmt->video.i_frame_rate_base )
- {
- msg_Warn( p_mux, "Missing frame rate, assuming 25fps" );
- p_input->p_fmt->video.i_frame_rate = 25;
- p_input->p_fmt->video.i_frame_rate_base = 1;
- }
- switch( p_stream->i_fourcc )
- {
- case VLC_FOURCC( 'm', 'p', 'g', 'v' ):
- case VLC_FOURCC( 'm', 'p', '4', 'v' ):
- case VLC_FOURCC( 'D', 'I', 'V', '3' ):
- case VLC_FOURCC( 'M', 'J', 'P', 'G' ):
- case VLC_FOURCC( 'W', 'M', 'V', '1' ):
- case VLC_FOURCC( 'W', 'M', 'V', '2' ):
- case VLC_FOURCC( 'W', 'M', 'V', '3' ):
- case VLC_FOURCC( 'S', 'N', 'O', 'W' ):
- p_stream->p_oggds_header = malloc( sizeof(oggds_header_t) );
- memset( p_stream->p_oggds_header, 0, sizeof(oggds_header_t) );
- p_stream->p_oggds_header->i_packet_type = PACKET_TYPE_HEADER;
- memcpy( p_stream->p_oggds_header->stream_type, "video", 5 );
- if( p_stream->i_fourcc == VLC_FOURCC( 'm', 'p', '4', 'v' ) )
- {
- memcpy( p_stream->p_oggds_header->sub_type, "XVID", 4 );
- }
- else if( p_stream->i_fourcc == VLC_FOURCC( 'D', 'I', 'V', '3' ) )
- {
- memcpy( p_stream->p_oggds_header->sub_type, "DIV3", 4 );
- }
- else
- {
- memcpy( p_stream->p_oggds_header->sub_type,
- &p_stream->i_fourcc, 4 );
- }
- SetDWLE( &p_stream->p_oggds_header->i_size,
- sizeof( oggds_header_t ) - 1 );
- SetQWLE( &p_stream->p_oggds_header->i_time_unit,
- I64C(10000000) * p_input->p_fmt->video.i_frame_rate_base /
- (int64_t)p_input->p_fmt->video.i_frame_rate );
- SetQWLE( &p_stream->p_oggds_header->i_samples_per_unit, 1 );
- SetDWLE( &p_stream->p_oggds_header->i_default_len, 1 ); /* ??? */
- SetDWLE( &p_stream->p_oggds_header->i_buffer_size, 1024*1024 );
- SetWLE( &p_stream->p_oggds_header->i_bits_per_sample, 0 );
- SetDWLE( &p_stream->p_oggds_header->header.video.i_width,
- p_input->p_fmt->video.i_width );
- SetDWLE( &p_stream->p_oggds_header->header.video.i_height,
- p_input->p_fmt->video.i_height );
- msg_Dbg( p_mux, "%4.4s stream", (char *)&p_stream->i_fourcc );
- break;
- case VLC_FOURCC( 't', 'h', 'e', 'o' ):
- msg_Dbg( p_mux, "theora stream" );
- break;
- default:
- FREE( p_input->p_sys );
- return VLC_EGENERIC;
- }
- break;
- case AUDIO_ES:
- switch( p_stream->i_fourcc )
- {
- case VLC_FOURCC( 'v', 'o', 'r', 'b' ):
- msg_Dbg( p_mux, "vorbis stream" );
- break;
- case VLC_FOURCC( 's', 'p', 'x', ' ' ):
- msg_Dbg( p_mux, "speex stream" );
- break;
- case VLC_FOURCC( 'f', 'l', 'a', 'c' ):
- msg_Dbg( p_mux, "flac stream" );
- break;
- default:
- fourcc_to_wf_tag( p_stream->i_fourcc, &i_tag );
- if( i_tag == WAVE_FORMAT_UNKNOWN )
- {
- FREE( p_input->p_sys );
- return VLC_EGENERIC;
- }
- p_stream->p_oggds_header =
- malloc( sizeof(oggds_header_t) + p_input->p_fmt->i_extra );
- memset( p_stream->p_oggds_header, 0, sizeof(oggds_header_t) );
- p_stream->p_oggds_header->i_packet_type = PACKET_TYPE_HEADER;
- SetDWLE( &p_stream->p_oggds_header->i_size,
- sizeof( oggds_header_t ) - 1 + p_input->p_fmt->i_extra );
- if( p_input->p_fmt->i_extra )
- {
- memcpy( &p_stream->p_oggds_header[1],
- p_input->p_fmt->p_extra, p_input->p_fmt->i_extra );
- }
- memcpy( p_stream->p_oggds_header->stream_type, "audio", 5 );
- memset( p_stream->p_oggds_header->sub_type, 0, 4 );
- sprintf( p_stream->p_oggds_header->sub_type, "%-x", i_tag );
- SetQWLE( &p_stream->p_oggds_header->i_time_unit, I64C(10000000) );
- SetDWLE( &p_stream->p_oggds_header->i_default_len, 1 );
- SetDWLE( &p_stream->p_oggds_header->i_buffer_size, 30*1024 );
- SetQWLE( &p_stream->p_oggds_header->i_samples_per_unit,
- p_input->p_fmt->audio.i_rate );
- SetWLE( &p_stream->p_oggds_header->i_bits_per_sample,
- p_input->p_fmt->audio.i_bitspersample );
- SetDWLE( &p_stream->p_oggds_header->header.audio.i_channels,
- p_input->p_fmt->audio.i_channels );
- SetDWLE( &p_stream->p_oggds_header->header.audio.i_block_align,
- p_input->p_fmt->audio.i_blockalign );
- SetDWLE( &p_stream->p_oggds_header->header.audio.i_avgbytespersec,
- p_input->p_fmt->i_bitrate / 8);
- msg_Dbg( p_mux, "%4.4s stream", (char *)&p_stream->i_fourcc );
- break;
- }
- break;
- case SPU_ES:
- switch( p_stream->i_fourcc )
- {
- case VLC_FOURCC( 's', 'u','b', 't' ):
- p_stream->p_oggds_header = malloc( sizeof(oggds_header_t) );
- memset( p_stream->p_oggds_header, 0, sizeof(oggds_header_t) );
- p_stream->p_oggds_header->i_packet_type = PACKET_TYPE_HEADER;
- memcpy( p_stream->p_oggds_header->stream_type, "text", 4 );
- msg_Dbg( p_mux, "subtitles stream" );
- break;
- default:
- FREE( p_input->p_sys );
- return VLC_EGENERIC;
- }
- break;
- default:
- FREE( p_input->p_sys );
- return VLC_EGENERIC;
- }
- p_stream->b_new = VLC_TRUE;
- p_sys->i_add_streams++;
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * DelStream: Delete an elementary stream from the muxed stream
- *****************************************************************************/
- static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
- {
- sout_mux_sys_t *p_sys = p_mux->p_sys;
- ogg_stream_t *p_stream = (ogg_stream_t*)p_input->p_sys;
- block_t *p_og;
- msg_Dbg( p_mux, "removing input" );
- /* flush all remaining data */
- if( p_input->p_sys )
- {
- if( !p_stream->b_new )
- {
- while( p_input->p_fifo->i_depth ) MuxBlock( p_mux, p_input );
- }
- if( !p_stream->b_new &&
- ( p_og = OggStreamFlush( p_mux, &p_stream->os, 0 ) ) )
- {
- OggSetDate( p_og, p_stream->i_dts, p_stream->i_length );
- sout_AccessOutWrite( p_mux->p_access, p_og );
- }
- /* move input in delete queue */
- if( !p_stream->b_new )
- {
- p_sys->pp_del_streams = realloc( p_sys->pp_del_streams,
- (p_sys->i_del_streams + 1) *
- sizeof(ogg_stream_t *) );
- p_sys->pp_del_streams[p_sys->i_del_streams++] = p_stream;
- }
- else
- {
- /* Wasn't already added so get rid of it */
- FREE( p_stream->p_oggds_header );
- FREE( p_stream );
- p_sys->i_add_streams--;
- }
- }
- p_input->p_sys = NULL;
- return 0;
- }
- /*****************************************************************************
- * Ogg bitstream manipulation routines
- *****************************************************************************/
- static block_t *OggStreamFlush( sout_mux_t *p_mux,
- ogg_stream_state *p_os, mtime_t i_pts )
- {
- block_t *p_og, *p_og_first = NULL;
- ogg_page og;
- while( ogg_stream_flush( p_os, &og ) )
- {
- /* Flush all data */
- p_og = block_New( p_mux, og.header_len + og.body_len );
- memcpy( p_og->p_buffer, og.header, og.header_len );
- memcpy( p_og->p_buffer + og.header_len, og.body, og.body_len );
- p_og->i_dts = 0;
- p_og->i_pts = i_pts;
- p_og->i_length = 0;
- i_pts = 0; // write it only once
- block_ChainAppend( &p_og_first, p_og );
- }
- return p_og_first;
- }
- static block_t *OggStreamPageOut( sout_mux_t *p_mux,
- ogg_stream_state *p_os, mtime_t i_pts )
- {
- block_t *p_og, *p_og_first = NULL;
- ogg_page og;
- while( ogg_stream_pageout( p_os, &og ) )
- {
- /* Flush all data */
- p_og = block_New( p_mux, og.header_len + og.body_len );
- memcpy( p_og->p_buffer, og.header, og.header_len );
- memcpy( p_og->p_buffer + og.header_len, og.body, og.body_len );
- p_og->i_dts = 0;
- p_og->i_pts = i_pts;
- p_og->i_length = 0;
- i_pts = 0; // write them only once
- block_ChainAppend( &p_og_first, p_og );
- }
- return p_og_first;
- }
- static block_t *OggCreateHeader( sout_mux_t *p_mux, mtime_t i_dts )
- {
- block_t *p_hdr = NULL;
- block_t *p_og = NULL;
- ogg_packet op;
- uint8_t *p_extra;
- int i, i_extra;
- /* Write header for each stream. All b_o_s (beginning of stream) packets
- * must appear first in the ogg stream so we take care of them first. */
- for( i = 0; i < p_mux->i_nb_inputs; i++ )
- {
- sout_input_t *p_input = p_mux->pp_inputs[i];
- ogg_stream_t *p_stream = (ogg_stream_t*)p_input->p_sys;
- p_stream->b_new = VLC_FALSE;
- msg_Dbg( p_mux, "creating header for %4.4s",
- (char *)&p_stream->i_fourcc );
- ogg_stream_init( &p_stream->os, p_stream->i_serial_no );
- p_stream->i_packet_no = 0;
- if( p_stream->i_fourcc == VLC_FOURCC( 'v', 'o', 'r', 'b' ) ||
- p_stream->i_fourcc == VLC_FOURCC( 's', 'p', 'x', ' ' ) ||
- p_stream->i_fourcc == VLC_FOURCC( 't', 'h', 'e', 'o' ) )
- {
- /* First packet in order: vorbis/speex/theora info */
- p_extra = p_input->p_fmt->p_extra;
- i_extra = p_input->p_fmt->i_extra;
- op.bytes = *(p_extra++) << 8;
- op.bytes |= (*(p_extra++) & 0xFF);
- op.packet = p_extra;
- i_extra -= (op.bytes + 2);
- if( i_extra < 0 )
- {
- msg_Err( p_mux, "header data corrupted");
- op.bytes += i_extra;
- }
- op.b_o_s = 1;
- op.e_o_s = 0;
- op.granulepos = 0;
- op.packetno = p_stream->i_packet_no++;
- ogg_stream_packetin( &p_stream->os, &op );
- p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
- /* Get keyframe_granule_shift for theora granulepos calculation */
- if( p_stream->i_fourcc == VLC_FOURCC( 't', 'h', 'e', 'o' ) )
- {
- int i_keyframe_frequency_force =
- 1 << ((op.packet[40] << 6 >> 3) | (op.packet[41] >> 5));
- /* granule_shift = i_log( frequency_force -1 ) */
- p_stream->i_keyframe_granule_shift = 0;
- i_keyframe_frequency_force--;
- while( i_keyframe_frequency_force )
- {
- p_stream->i_keyframe_granule_shift++;
- i_keyframe_frequency_force >>= 1;
- }
- }
- }
- else if( p_stream->i_fourcc == VLC_FOURCC( 'f', 'l', 'a', 'c' ) )
- {
- /* flac stream marker (yeah, only that in the 1st packet) */
- op.packet = "fLaC";
- op.bytes = 4;
- op.b_o_s = 1;
- op.e_o_s = 0;
- op.granulepos = 0;
- op.packetno = p_stream->i_packet_no++;
- ogg_stream_packetin( &p_stream->os, &op );
- p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
- }
- else if( p_stream->p_oggds_header )
- {
- /* ds header */
- op.packet = (uint8_t*)p_stream->p_oggds_header;
- op.bytes = p_stream->p_oggds_header->i_size + 1;
- op.b_o_s = 1;
- op.e_o_s = 0;
- op.granulepos = 0;
- op.packetno = p_stream->i_packet_no++;
- ogg_stream_packetin( &p_stream->os, &op );
- p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
- }
- block_ChainAppend( &p_hdr, p_og );
- }
- /* Take care of the non b_o_s headers */
- for( i = 0; i < p_mux->i_nb_inputs; i++ )
- {
- sout_input_t *p_input = p_mux->pp_inputs[i];
- ogg_stream_t *p_stream = (ogg_stream_t*)p_input->p_sys;
- if( p_stream->i_fourcc == VLC_FOURCC( 'v', 'o', 'r', 'b' ) ||
- p_stream->i_fourcc == VLC_FOURCC( 's', 'p', 'x', ' ' ) ||
- p_stream->i_fourcc == VLC_FOURCC( 't', 'h', 'e', 'o' ) )
- {
- /* Special case, headers are already there in the incoming stream.
- * We need to gather them an mark them as headers. */
- int j = 2;
- if( p_stream->i_fourcc == VLC_FOURCC( 's', 'p', 'x', ' ' ) ) j = 1;
- p_extra = p_input->p_fmt->p_extra;
- i_extra = p_input->p_fmt->i_extra;
- /* Skip 1 header */
- op.bytes = *(p_extra++) << 8;
- op.bytes |= (*(p_extra++) & 0xFF);
- op.packet = p_extra;
- p_extra += op.bytes;
- i_extra -= (op.bytes + 2);
- while( j-- )
- {
- op.bytes = *(p_extra++) << 8;
- op.bytes |= (*(p_extra++) & 0xFF);
- op.packet = p_extra;
- p_extra += op.bytes;
- i_extra -= (op.bytes + 2);
- if( i_extra < 0 )
- {
- msg_Err( p_mux, "header data corrupted");
- op.bytes += i_extra;
- }
- op.b_o_s = 0;
- op.e_o_s = 0;
- op.granulepos = 0;
- op.packetno = p_stream->i_packet_no++;
- ogg_stream_packetin( &p_stream->os, &op );
- p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
- block_ChainAppend( &p_hdr, p_og );
- }
- }
- else if( p_stream->i_fourcc != VLC_FOURCC( 'f', 'l', 'a', 'c' ) )
- {
- uint8_t com[128];
- int i_com;
- /* comment */
- com[0] = PACKET_TYPE_COMMENT;
- i_com = snprintf( &com[1], 128, PACKAGE_VERSION" stream output" )
- + 1;
- op.packet = com;
- op.bytes = i_com;
- op.b_o_s = 0;
- op.e_o_s = 0;
- op.granulepos = 0;
- op.packetno = p_stream->i_packet_no++;
- ogg_stream_packetin( &p_stream->os, &op );
- p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
- block_ChainAppend( &p_hdr, p_og );
- }
- /* Special case for mp4v and flac */
- if( ( p_stream->i_fourcc == VLC_FOURCC( 'm', 'p', '4', 'v' ) ||
- p_stream->i_fourcc == VLC_FOURCC( 'f', 'l', 'a', 'c' ) ) &&
- p_input->p_fmt->i_extra )
- {
- /* Send a packet with the VOL data for mp4v
- * or STREAMINFO for flac */
- msg_Dbg( p_mux, "writing extra data" );
- op.bytes = p_input->p_fmt->i_extra;
- op.packet = p_input->p_fmt->p_extra;
- if( p_stream->i_fourcc == VLC_FOURCC( 'f', 'l', 'a', 'c' ) )
- {
- /* Skip the flac stream marker */
- op.bytes -= 4;
- op.packet+= 4;
- }
- op.b_o_s = 0;
- op.e_o_s = 0;
- op.granulepos = 0;
- op.packetno = p_stream->i_packet_no++;
- ogg_stream_packetin( &p_stream->os, &op );
- p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
- block_ChainAppend( &p_hdr, p_og );
- }
- }
- /* set HEADER flag */
- for( p_og = p_hdr; p_og != NULL; p_og = p_og->p_next )
- {
- p_og->i_flags |= BLOCK_FLAG_HEADER;
- }
- return p_hdr;
- }
- static block_t *OggCreateFooter( sout_mux_t *p_mux, mtime_t i_dts )
- {
- sout_mux_sys_t *p_sys = p_mux->p_sys;
- block_t *p_hdr = NULL;
- block_t *p_og;
- ogg_packet op;
- int i;
- /* flush all remaining data */
- for( i = 0; i < p_mux->i_nb_inputs; i++ )
- {
- ogg_stream_t *p_stream = p_mux->pp_inputs[i]->p_sys;
- /* skip newly added streams */
- if( p_stream->b_new ) continue;
- if( ( p_og = OggStreamFlush( p_mux, &p_stream->os, 0 ) ) )
- {
- OggSetDate( p_og, p_stream->i_dts, p_stream->i_length );
- sout_AccessOutWrite( p_mux->p_access, p_og );
- }
- }
- /* Write eos packets for each stream. */
- for( i = 0; i < p_mux->i_nb_inputs; i++ )
- {
- ogg_stream_t *p_stream = p_mux->pp_inputs[i]->p_sys;
- /* skip newly added streams */
- if( p_stream->b_new ) continue;
- op.packet = NULL;
- op.bytes = 0;
- op.b_o_s = 0;
- op.e_o_s = 1;
- op.granulepos = -1;
- op.packetno = p_stream->i_packet_no++;
- ogg_stream_packetin( &p_stream->os, &op );
- p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
- block_ChainAppend( &p_hdr, p_og );
- ogg_stream_clear( &p_stream->os );
- }
- for( i = 0; i < p_sys->i_del_streams; i++ )
- {
- op.packet = NULL;
- op.bytes = 0;
- op.b_o_s = 0;
- op.e_o_s = 1;
- op.granulepos = -1;
- op.packetno = p_sys->pp_del_streams[i]->i_packet_no++;
- ogg_stream_packetin( &p_sys->pp_del_streams[i]->os, &op );
- p_og = OggStreamFlush( p_mux, &p_sys->pp_del_streams[i]->os, 0 );
- block_ChainAppend( &p_hdr, p_og );
- ogg_stream_clear( &p_sys->pp_del_streams[i]->os );
- }
- return p_hdr;
- }
- static void OggSetDate( block_t *p_og, mtime_t i_dts, mtime_t i_length )
- {
- int i_count;
- block_t *p_tmp;
- mtime_t i_delta;
- for( p_tmp = p_og, i_count = 0; p_tmp != NULL; p_tmp = p_tmp->p_next )
- {
- i_count++;
- }
- i_delta = i_length / i_count;
- for( p_tmp = p_og; p_tmp != NULL; p_tmp = p_tmp->p_next )
- {
- p_tmp->i_dts = i_dts;
- p_tmp->i_length = i_delta;
- i_dts += i_delta;
- }
- }
- /*****************************************************************************
- * Mux: multiplex available data in input fifos into the Ogg bitstream
- *****************************************************************************/
- static int Mux( sout_mux_t *p_mux )
- {
- sout_mux_sys_t *p_sys = p_mux->p_sys;
- block_t *p_og = NULL;
- int i_stream;
- mtime_t i_dts;
- if( p_sys->i_add_streams || p_sys->i_del_streams )
- {
- /* Open new ogg stream */
- if( MuxGetStream( p_mux, &i_stream, &i_dts) < 0 )
- {
- msg_Dbg( p_mux, "waiting for data..." );
- return VLC_SUCCESS;
- }
- if( p_sys->i_streams )
- {
- /* Close current ogg stream */
- int i;
- msg_Dbg( p_mux, "writing footer" );
- block_ChainAppend( &p_og, OggCreateFooter( p_mux, 0 ) );
- /* Remove deleted logical streams */
- for( i = 0; i < p_sys->i_del_streams; i++ )
- {
- FREE( p_sys->pp_del_streams[i]->p_oggds_header );
- FREE( p_sys->pp_del_streams[i] );
- }
- FREE( p_sys->pp_del_streams );
- p_sys->i_streams = 0;
- }
- msg_Dbg( p_mux, "writing header" );
- p_sys->i_start_dts = i_dts;
- p_sys->i_streams = p_mux->i_nb_inputs;
- p_sys->i_del_streams = 0;
- p_sys->i_add_streams = 0;
- block_ChainAppend( &p_og, OggCreateHeader( p_mux, i_dts ) );
- /* Write header and/or footer */
- OggSetDate( p_og, i_dts, 0 );
- sout_AccessOutWrite( p_mux->p_access, p_og );
- p_og = NULL;
- }
- for( ;; )
- {
- if( MuxGetStream( p_mux, &i_stream, 0 ) < 0 ) return VLC_SUCCESS;
- MuxBlock( p_mux, p_mux->pp_inputs[i_stream] );
- }
- return VLC_SUCCESS;
- }
- static int MuxBlock( sout_mux_t *p_mux, sout_input_t *p_input )
- {
- sout_mux_sys_t *p_sys = p_mux->p_sys;
- ogg_stream_t *p_stream = (ogg_stream_t*)p_input->p_sys;
- block_t *p_data = block_FifoGet( p_input->p_fifo );
- block_t *p_og = NULL;
- ogg_packet op;
- if( p_stream->i_fourcc != VLC_FOURCC( 'v', 'o', 'r', 'b' ) &&
- p_stream->i_fourcc != VLC_FOURCC( 'f', 'l', 'a', 'c' ) &&
- p_stream->i_fourcc != VLC_FOURCC( 's', 'p', 'x', ' ' ) &&
- p_stream->i_fourcc != VLC_FOURCC( 't', 'h', 'e', 'o' ) )
- {
- p_data = block_Realloc( p_data, 1, p_data->i_buffer );
- p_data->p_buffer[0] = PACKET_IS_SYNCPOINT; // FIXME
- }
- op.packet = p_data->p_buffer;
- op.bytes = p_data->i_buffer;
- op.b_o_s = 0;
- op.e_o_s = 0;
- op.packetno = p_stream->i_packet_no++;
- if( p_stream->i_cat == AUDIO_ES )
- {
- if( p_stream->i_fourcc == VLC_FOURCC( 'v', 'o', 'r', 'b' ) ||
- p_stream->i_fourcc == VLC_FOURCC( 'f', 'l', 'a', 'c' ) ||
- p_stream->i_fourcc == VLC_FOURCC( 's', 'p', 'x', ' ' ) )
- {
- /* number of sample from begining + current packet */
- op.granulepos =
- ( p_data->i_dts - p_sys->i_start_dts + p_data->i_length ) *
- (mtime_t)p_input->p_fmt->audio.i_rate / I64C(1000000);
- }
- else if( p_stream->p_oggds_header )
- {
- /* number of sample from begining */
- op.granulepos = ( p_data->i_dts - p_sys->i_start_dts ) *
- p_stream->p_oggds_header->i_samples_per_unit / I64C(1000000);
- }
- }
- else if( p_stream->i_cat == VIDEO_ES )
- {
- if( p_stream->i_fourcc == VLC_FOURCC( 't', 'h', 'e', 'o' ) )
- {
- /* FIXME, we assume only keyframes */
- op.granulepos = ( ( p_data->i_dts - p_sys->i_start_dts ) *
- p_input->p_fmt->video.i_frame_rate /
- p_input->p_fmt->video.i_frame_rate_base /
- I64C(1000000) ) << p_stream->i_keyframe_granule_shift;
- }
- else if( p_stream->p_oggds_header )
- op.granulepos = ( p_data->i_dts - p_sys->i_start_dts ) * I64C(10) /
- p_stream->p_oggds_header->i_time_unit;
- }
- else if( p_stream->i_cat == SPU_ES )
- {
- /* granulepos is in milisec */
- op.granulepos = ( p_data->i_dts - p_sys->i_start_dts ) / 1000;
- }
- ogg_stream_packetin( &p_stream->os, &op );
- if( p_stream->i_cat == SPU_ES ||
- p_stream->i_fourcc == VLC_FOURCC( 's', 'p', 'x', ' ' ) )
- {
- /* Subtitles or Speex packets are quite small so they
- * need to be flushed to be sent on time */
- p_og = OggStreamFlush( p_mux, &p_stream->os, p_data->i_dts );
- }
- else
- {
- p_og = OggStreamPageOut( p_mux, &p_stream->os, p_data->i_dts );
- }
- if( p_og )
- {
- OggSetDate( p_og, p_stream->i_dts, p_stream->i_length );
- p_stream->i_dts = -1;
- p_stream->i_length = 0;
- sout_AccessOutWrite( p_mux->p_access, p_og );
- }
- else
- {
- if( p_stream->i_dts < 0 )
- {
- p_stream->i_dts = p_data->i_dts;
- }
- p_stream->i_length += p_data->i_length;
- }
- block_Release( p_data );
- return VLC_SUCCESS;
- }