+++ /dev/null
-/*****************************************************************************
- * transrate.c: MPEG2 video transrating module
- *****************************************************************************
- * Copyright (C) 2003 the VideoLAN team
- * $Id$
- *
- * Authors: Christophe Massiot <massiot@via.ecp.fr>
- * Laurent Aimar <fenrir@via.ecp.fr>
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
-
-/*****************************************************************************
- * Preamble
- *****************************************************************************/
-#define NDEBUG 1
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include <assert.h>
-#include <math.h>
-
-#include <vlc_common.h>
-#include <vlc_plugin.h>
-#include <vlc_sout.h>
-#include <vlc_input.h>
-#include <vlc_block.h>
-
-#include "transrate.h"
-
-/*****************************************************************************
- * Exported prototypes
- *****************************************************************************/
-static int Open ( vlc_object_t * );
-static void Close ( vlc_object_t * );
-
-static sout_stream_id_t *Add ( sout_stream_t *, es_format_t * );
-static int Del ( sout_stream_t *, sout_stream_id_t * );
-static int Send( sout_stream_t *, sout_stream_id_t *, block_t * );
-
-static int transrate_video_process( sout_stream_t *, sout_stream_id_t *, block_t *, block_t ** );
-
-/*****************************************************************************
- * Module descriptor
- *****************************************************************************/
-
-#define VB_TEXT N_("Video bitrate")
-/*xgettext:no-c-format*/
-#define VB_LONGTEXT N_( \
- "New target video bitrate. Quality is ok for -10/15\% of the original" \
- "bitrate." )
-
-#define SHAPING_TEXT N_("Shaping delay")
-#define SHAPING_LONGTEXT N_( \
- "Amount of data used for transrating in ms." )
-
-#define MPEG4_MATRIX_TEXT N_("Use MPEG4 matrix")
-#define MPEG4_MATRIX_LONGTEXT N_( \
- "Use the MPEG4 quantification matrix." )
-
-#define SOUT_CFG_PREFIX "sout-transrate-"
-
-vlc_module_begin ()
- set_category( CAT_SOUT )
- set_subcategory( SUBCAT_SOUT_STREAM )
- set_description( N_("MPEG2 video transrating stream output") )
- set_capability( "sout stream", 50 )
- add_shortcut( "transrate" )
- set_shortname( N_("Transrate") )
- set_callbacks( Open, Close )
-
- add_integer( SOUT_CFG_PREFIX "vb", 3 * 100 * 1000, NULL,
- VB_TEXT, VB_LONGTEXT, false )
- add_integer( SOUT_CFG_PREFIX "shaping", 500, NULL,
- SHAPING_TEXT, SHAPING_LONGTEXT, false )
- add_bool( SOUT_CFG_PREFIX "mpeg4-matrix", false, NULL,
- MPEG4_MATRIX_TEXT, MPEG4_MATRIX_LONGTEXT, false )
-vlc_module_end ()
-
-static const char *const ppsz_sout_options[] = {
- "vb", "shaping", "mpeg4-matrix", NULL
-};
-
-struct sout_stream_sys_t
-{
- sout_stream_t *p_out;
-
- int i_vbitrate;
- mtime_t i_shaping_delay;
- int b_mpeg4_matrix;
-
- mtime_t i_dts, i_pts;
-};
-
-/*****************************************************************************
- * Open:
- *****************************************************************************/
-static int Open( vlc_object_t *p_this )
-{
- sout_stream_t *p_stream = (sout_stream_t*)p_this;
- sout_stream_sys_t *p_sys;
-
- p_sys = malloc( sizeof( sout_stream_sys_t ) );
- p_sys->p_out = sout_StreamNew( p_stream->p_sout, p_stream->psz_next );
-
- config_ChainParse( p_stream, SOUT_CFG_PREFIX, ppsz_sout_options,
- p_stream->p_cfg );
- p_sys->i_vbitrate = var_CreateGetInteger( p_stream, SOUT_CFG_PREFIX "vb" );
- if( p_sys->i_vbitrate < 16000 )
- p_sys->i_vbitrate *= 1000;
-
- p_sys->i_shaping_delay = var_CreateGetInteger( p_stream,
- SOUT_CFG_PREFIX "shaping" ) * 1000;
- if( p_sys->i_shaping_delay <= 0 )
- {
- msg_Err( p_stream,
- "invalid shaping (%"PRId64"ms) reseting to 500ms",
- p_sys->i_shaping_delay / 1000 );
- p_sys->i_shaping_delay = 500000;
- }
-
- p_sys->b_mpeg4_matrix = var_CreateGetBool( p_stream,
- SOUT_CFG_PREFIX "mpeg4-matrix" );
-
- msg_Dbg( p_stream, "codec video %dkb/s max gop=%"PRId64"us",
- p_sys->i_vbitrate / 1024, p_sys->i_shaping_delay );
-
- if( !p_sys->p_out )
- {
- msg_Err( p_stream, "cannot create chain" );
- free( p_sys );
- return VLC_EGENERIC;
- }
- p_stream->pf_add = Add;
- p_stream->pf_del = Del;
- p_stream->pf_send = Send;
-
- p_stream->p_sys = p_sys;
-
- return VLC_SUCCESS;
-}
-
-/*****************************************************************************
- * Close:
- *****************************************************************************/
-static void Close( vlc_object_t * p_this )
-{
- sout_stream_t *p_stream = (sout_stream_t *)p_this;
- sout_stream_sys_t *p_sys = p_stream->p_sys;
-
- sout_StreamDelete( p_sys->p_out );
- free( p_sys );
-}
-
-
-static sout_stream_id_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
-{
- sout_stream_sys_t *p_sys = p_stream->p_sys;
- sout_stream_id_t *id;
-
- id = malloc( sizeof( sout_stream_id_t ) );
- id->id = NULL;
-
- if( p_fmt->i_cat == VIDEO_ES
- && p_fmt->i_codec == VLC_CODEC_MPGV )
- {
- msg_Dbg( p_stream,
- "creating video transrating for fcc=`%4.4s'",
- (char*)&p_fmt->i_codec );
-
- id->p_current_buffer = NULL;
- id->p_next_gop = NULL;
- id->i_next_gop_duration = 0;
- id->i_next_gop_size = 0;
- memset( &id->tr, 0, sizeof( transrate_t ) );
- id->tr.bs.i_byte_in = id->tr.bs.i_byte_out = 0;
- id->tr.mpeg4_matrix = p_sys->b_mpeg4_matrix;
-
- /* open output stream */
- id->id = p_sys->p_out->pf_add( p_sys->p_out, p_fmt );
- id->b_transrate = true;
- }
- else
- {
- msg_Dbg( p_stream, "not transrating a stream (fcc=`%4.4s')", (char*)&p_fmt->i_codec );
- id->id = p_sys->p_out->pf_add( p_sys->p_out, p_fmt );
- id->b_transrate = false;
-
- if( id->id == NULL )
- {
- free( id );
- return NULL;
- }
- }
-
- return id;
-}
-
-static int Del ( sout_stream_t *p_stream, sout_stream_id_t *id )
-{
- sout_stream_sys_t *p_sys = p_stream->p_sys;
-
- if( id->id )
- {
- p_sys->p_out->pf_del( p_sys->p_out, id->id );
- }
- free( id );
-
- return VLC_SUCCESS;
-}
-
-static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
- block_t *p_buffer )
-{
- sout_stream_sys_t *p_sys = p_stream->p_sys;
-
- if( id->b_transrate )
- {
- block_t *p_buffer_out;
- /* be sure to have at least 8 bytes of padding (maybe only 4) */
- p_buffer = block_Realloc( p_buffer, 0, p_buffer->i_buffer + 8 );
- p_buffer->i_buffer -= 8;
- memset( &p_buffer->p_buffer[p_buffer->i_buffer], 0, 8 );
-
- transrate_video_process( p_stream, id, p_buffer, &p_buffer_out );
-
- if( p_buffer_out )
- {
- return p_sys->p_out->pf_send( p_sys->p_out, id->id, p_buffer_out );
- }
- return VLC_SUCCESS;
- }
- else if( id->id != NULL )
- {
- return p_sys->p_out->pf_send( p_sys->p_out, id->id, p_buffer );
- }
- else
- {
- block_Release( p_buffer );
- return VLC_EGENERIC;
- }
-}
-
-static int transrate_video_process( sout_stream_t *p_stream,
- sout_stream_id_t *id, block_t *in, block_t **out )
-{
- transrate_t *tr = &id->tr;
- bs_transrate_t *bs = &tr->bs;
-
- *out = NULL;
-
- while ( in != NULL )
- {
- block_t * p_next = in->p_next;
- int i_flags = in->i_flags;
-
- in->p_next = NULL;
- block_ChainAppend( &id->p_next_gop, in );
- id->i_next_gop_duration += in->i_length;
- id->i_next_gop_size += in->i_buffer;
- in = p_next;
-
- if( ((i_flags & BLOCK_FLAG_TYPE_I )
- && id->i_next_gop_duration >= 300000)
- || (id->i_next_gop_duration > p_stream->p_sys->i_shaping_delay) )
- {
- mtime_t i_bitrate = (mtime_t)id->i_next_gop_size * 8000
- / (id->i_next_gop_duration / 1000);
- mtime_t i_new_bitrate;
-
- id->tr.i_total_input = id->i_next_gop_size;
- id->tr.i_remaining_input = id->i_next_gop_size;
- id->tr.i_wanted_output = (p_stream->p_sys->i_vbitrate)
- * (id->i_next_gop_duration / 1000) / 8000;
- id->tr.i_current_output = 0;
-
- id->p_current_buffer = id->p_next_gop;
-
- while ( id->p_current_buffer != NULL )
- {
- block_t * p_next = id->p_current_buffer->p_next;
- if ( !p_stream->p_sys->b_mpeg4_matrix
- && id->tr.i_wanted_output >= id->tr.i_total_input )
- {
- bs->i_byte_out += id->p_current_buffer->i_buffer;
- id->p_current_buffer->p_next = NULL;
- block_ChainAppend( out, id->p_current_buffer );
- }
- else
- {
- if ( process_frame( p_stream, id, id->p_current_buffer,
- out, 0 ) < 0 )
- {
- id->p_current_buffer->p_next = NULL;
- block_ChainAppend( out, id->p_current_buffer );
- if ( p_stream->p_sys->b_mpeg4_matrix )
- id->tr.i_wanted_output = id->tr.i_total_input;
- }
- else
- {
- block_Release( id->p_current_buffer );
- }
- }
- id->p_current_buffer = p_next;
- }
-
- if ( id->tr.i_wanted_output < id->tr.i_total_input )
- {
- i_new_bitrate = (mtime_t)tr->i_current_output * 8000
- / (id->i_next_gop_duration / 1000);
- if (i_new_bitrate > p_stream->p_sys->i_vbitrate + 300000)
- msg_Err(p_stream, "%"PRId64" -> %"PRId64" d=%"PRId64,
- i_bitrate, i_new_bitrate,
- id->i_next_gop_duration);
- else
- msg_Dbg(p_stream, "%"PRId64" -> %"PRId64" d=%"PRId64,
- i_bitrate, i_new_bitrate,
- id->i_next_gop_duration);
- }
-
- id->p_next_gop = NULL;
- id->i_next_gop_duration = 0;
- id->i_next_gop_size = 0;
- }
- }
-
- return VLC_SUCCESS;
-}
-
projects / vlc / blobdiff