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vlc/modules/stream_out/transcode/video.c

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/*****************************************************************************
* video.c: transcoding stream output module (video)
*****************************************************************************
* Copyright (C) 2003-2009 VLC authors and VideoLAN
* $Id$
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Gildas Bazin <gbazin@videolan.org>
* Jean-Paul Saman <jpsaman #_at_# m2x dot nl>
* Antoine Cellerier <dionoea at videolan dot org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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
*****************************************************************************/
#include "transcode.h"
#include <math.h>
#include <vlc_meta.h>
#include <vlc_spu.h>
#include <vlc_modules.h>
#define ENC_FRAMERATE (25 * 1000)
#define ENC_FRAMERATE_BASE 1000
static const video_format_t* video_output_format( sout_stream_id_sys_t *id,
picture_t *p_pic )
{
assert( id && p_pic );
if( id->p_uf_chain )
return &filter_chain_GetFmtOut( id->p_uf_chain )->video;
else if( id->p_f_chain )
return &filter_chain_GetFmtOut( id->p_f_chain )->video;
else
return &p_pic->format;
}
static int video_update_format_decoder( decoder_t *p_dec )
{
sout_stream_t *stream = (sout_stream_t*) p_dec->p_owner;
sout_stream_sys_t *sys = stream->p_sys;
sout_stream_id_sys_t *id = p_dec->p_queue_ctx;
filter_chain_t *test_chain;
filter_owner_t filter_owner = {
.sys = sys,
};
/* will need proper chroma for get_buffer */
p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
if( id->p_encoder->fmt_in.i_codec == p_dec->fmt_out.i_codec ||
video_format_IsSimilar( &id->video_dec_out,
&p_dec->fmt_out.video ) )
return 0;
id->video_dec_out = p_dec->fmt_out.video;
id->video_dec_out.p_palette = NULL;
msg_Dbg( stream, "Checking if filter chain %4.4s -> %4.4s is possible",
(char *)&p_dec->fmt_out.i_codec, (char*)&id->p_encoder->fmt_in.i_codec );
test_chain = filter_chain_NewVideo( stream, false, &filter_owner );
filter_chain_Reset( test_chain, &p_dec->fmt_out, &p_dec->fmt_out );
int chain_works = filter_chain_AppendConverter( test_chain, &p_dec->fmt_out,
&id->p_encoder->fmt_in );
filter_chain_Delete( test_chain );
msg_Dbg( stream, "Filter chain testing done, input chroma %4.4s seems to be %s for transcode",
(char *)&p_dec->fmt_out.video.i_chroma,
chain_works == 0 ? "possible" : "not possible");
return chain_works;
}
static picture_t *video_new_buffer_decoder( decoder_t *p_dec )
{
return picture_NewFromFormat( &p_dec->fmt_out.video );
}
static picture_t *video_new_buffer_encoder( encoder_t *p_enc )
{
return picture_NewFromFormat( &p_enc->fmt_in.video );
}
static picture_t *transcode_video_filter_buffer_new( filter_t *p_filter )
{
p_filter->fmt_out.video.i_chroma = p_filter->fmt_out.i_codec;
return picture_NewFromFormat( &p_filter->fmt_out.video );
}
static void* EncoderThread( void *obj )
{
sout_stream_sys_t *p_sys = (sout_stream_sys_t*)obj;
sout_stream_id_sys_t *id = p_sys->id_video;
picture_t *p_pic = NULL;
int canc = vlc_savecancel ();
block_t *p_block = NULL;
vlc_mutex_lock( &p_sys->lock_out );
for( ;; )
{
while( !p_sys->b_abort &&
(p_pic = picture_fifo_Pop( p_sys->pp_pics )) == NULL )
vlc_cond_wait( &p_sys->cond, &p_sys->lock_out );
vlc_sem_post( &p_sys->picture_pool_has_room );
if( p_pic )
{
/* release lock while encoding */
vlc_mutex_unlock( &p_sys->lock_out );
p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
picture_Release( p_pic );
vlc_mutex_lock( &p_sys->lock_out );
block_ChainAppend( &p_sys->p_buffers, p_block );
}
if( p_sys->b_abort )
break;
}
/*Encode what we have in the buffer on closing*/
while( (p_pic = picture_fifo_Pop( p_sys->pp_pics )) != NULL )
{
vlc_sem_post( &p_sys->picture_pool_has_room );
p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
picture_Release( p_pic );
block_ChainAppend( &p_sys->p_buffers, p_block );
}
/*Now flush encoder*/
do {
p_block = id->p_encoder->pf_encode_video(id->p_encoder, NULL );
block_ChainAppend( &p_sys->p_buffers, p_block );
} while( p_block );
vlc_mutex_unlock( &p_sys->lock_out );
vlc_restorecancel (canc);
return NULL;
}
static int decoder_queue_video( decoder_t *p_dec, picture_t *p_pic )
{
sout_stream_id_sys_t *id = p_dec->p_queue_ctx;
vlc_mutex_lock(&id->fifo.lock);
*id->fifo.pic.last = p_pic;
id->fifo.pic.last = &p_pic->p_next;
vlc_mutex_unlock(&id->fifo.lock);
return 0;
}
static picture_t *transcode_dequeue_all_pics( sout_stream_id_sys_t *id )
{
vlc_mutex_lock(&id->fifo.lock);
picture_t *p_pics = id->fifo.pic.first;
id->fifo.pic.first = NULL;
id->fifo.pic.last = &id->fifo.pic.first;
vlc_mutex_unlock(&id->fifo.lock);
return p_pics;
}
static int transcode_video_new( sout_stream_t *p_stream, sout_stream_id_sys_t *id )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
/* Open decoder
* Initialization of decoder structures
*/
id->p_decoder->pf_decode = NULL;
id->p_decoder->pf_queue_video = decoder_queue_video;
id->p_decoder->p_queue_ctx = id;
id->p_decoder->pf_get_cc = NULL;
id->p_decoder->pf_vout_format_update = video_update_format_decoder;
id->p_decoder->pf_vout_buffer_new = video_new_buffer_decoder;
id->p_decoder->p_owner = (decoder_owner_sys_t*) p_stream;
id->p_decoder->p_module =
module_need( id->p_decoder, "video decoder", "$codec", false );
if( !id->p_decoder->p_module )
{
msg_Err( p_stream, "cannot find video decoder" );
return VLC_EGENERIC;
}
/*
* Open encoder.
* Because some info about the decoded input will only be available
* once the first frame is decoded, we actually only test the availability
* of the encoder here.
*/
/* Initialization of encoder format structures */
es_format_Init( &id->p_encoder->fmt_in, id->p_decoder->fmt_in.i_cat,
id->p_decoder->fmt_out.i_codec );
/* The dimensions will be set properly later on.
* Just put sensible values so we can test an encoder is available. */
id->p_encoder->fmt_in.video.i_width =
id->p_encoder->fmt_out.video.i_width
? id->p_encoder->fmt_out.video.i_width
: id->p_decoder->fmt_in.video.i_width
? id->p_decoder->fmt_in.video.i_width : 16;
id->p_encoder->fmt_in.video.i_height =
id->p_encoder->fmt_out.video.i_height
? id->p_encoder->fmt_out.video.i_height
: id->p_decoder->fmt_in.video.i_height
? id->p_decoder->fmt_in.video.i_height : 16;
id->p_encoder->fmt_in.video.i_visible_width =
id->p_encoder->fmt_out.video.i_visible_width
? id->p_encoder->fmt_out.video.i_visible_width
: id->p_decoder->fmt_in.video.i_visible_width
? id->p_decoder->fmt_in.video.i_visible_width : id->p_encoder->fmt_in.video.i_width;
id->p_encoder->fmt_in.video.i_visible_height =
id->p_encoder->fmt_out.video.i_visible_height
? id->p_encoder->fmt_out.video.i_visible_height
: id->p_decoder->fmt_in.video.i_visible_height
? id->p_decoder->fmt_in.video.i_visible_height : id->p_encoder->fmt_in.video.i_height;
/* The same goes with frame rate. Some encoders need it to be initialized */
id->p_encoder->fmt_in.video.i_frame_rate = ENC_FRAMERATE;
id->p_encoder->fmt_in.video.i_frame_rate_base = ENC_FRAMERATE_BASE;
id->p_encoder->i_threads = p_sys->i_threads;
id->p_encoder->p_cfg = p_sys->p_video_cfg;
id->p_encoder->p_module =
module_need( id->p_encoder, "encoder", p_sys->psz_venc, true );
if( !id->p_encoder->p_module )
{
msg_Err( p_stream, "cannot find video encoder (module:%s fourcc:%4.4s). Take a look few lines earlier to see possible reason.",
p_sys->psz_venc ? p_sys->psz_venc : "any",
(char *)&p_sys->i_vcodec );
module_unneed( id->p_decoder, id->p_decoder->p_module );
id->p_decoder->p_module = 0;
return VLC_EGENERIC;
}
/* Close the encoder.
* We'll open it only when we have the first frame. */
module_unneed( id->p_encoder, id->p_encoder->p_module );
if( id->p_encoder->fmt_out.p_extra )
{
free( id->p_encoder->fmt_out.p_extra );
id->p_encoder->fmt_out.p_extra = NULL;
id->p_encoder->fmt_out.i_extra = 0;
}
id->p_encoder->fmt_in.video.i_chroma = id->p_encoder->fmt_in.i_codec;
id->p_encoder->p_module = NULL;
if( p_sys->i_threads <= 0 )
return VLC_SUCCESS;
int i_priority = p_sys->b_high_priority ? VLC_THREAD_PRIORITY_OUTPUT :
VLC_THREAD_PRIORITY_VIDEO;
p_sys->id_video = id;
p_sys->pp_pics = picture_fifo_New();
if( p_sys->pp_pics == NULL )
{
msg_Err( p_stream, "cannot create picture fifo" );
module_unneed( id->p_decoder, id->p_decoder->p_module );
id->p_decoder->p_module = NULL;
return VLC_ENOMEM;
}
vlc_sem_init( &p_sys->picture_pool_has_room, p_sys->pool_size );
vlc_mutex_init( &p_sys->lock_out );
vlc_cond_init( &p_sys->cond );
p_sys->p_buffers = NULL;
p_sys->b_abort = false;
if( vlc_clone( &p_sys->thread, EncoderThread, p_sys, i_priority ) )
{
msg_Err( p_stream, "cannot spawn encoder thread" );
vlc_mutex_destroy( &p_sys->lock_out );
vlc_cond_destroy( &p_sys->cond );
picture_fifo_Delete( p_sys->pp_pics );
module_unneed( id->p_decoder, id->p_decoder->p_module );
id->p_decoder->p_module = NULL;
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
static void transcode_video_filter_init( sout_stream_t *p_stream,
sout_stream_id_sys_t *id )
{
filter_owner_t owner = {
.sys = p_stream->p_sys,
.video = {
.buffer_new = transcode_video_filter_buffer_new,
},
};
const es_format_t *p_fmt_out = &id->p_decoder->fmt_out;
id->p_encoder->fmt_in.video.i_chroma = id->p_encoder->fmt_in.i_codec;
id->p_f_chain = filter_chain_NewVideo( p_stream, false, &owner );
filter_chain_Reset( id->p_f_chain, p_fmt_out, p_fmt_out );
/* Check that we have visible_width/height*/
if( !id->p_decoder->fmt_out.video.i_visible_height )
id->p_decoder->fmt_out.video.i_visible_height = id->p_decoder->fmt_out.video.i_height;
if( !id->p_decoder->fmt_out.video.i_visible_width )
id->p_decoder->fmt_out.video.i_visible_width = id->p_decoder->fmt_out.video.i_width;
/* Deinterlace */
if( p_stream->p_sys->psz_deinterlace != NULL )
{
filter_chain_AppendFilter( id->p_f_chain,
p_stream->p_sys->psz_deinterlace,
p_stream->p_sys->p_deinterlace_cfg,
&id->p_decoder->fmt_out,
&id->p_decoder->fmt_out );
p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
}
if( p_stream->p_sys->b_master_sync )
{
filter_chain_AppendFilter( id->p_f_chain,
"fps",
NULL,
p_fmt_out,
&id->p_encoder->fmt_in );
p_fmt_out = filter_chain_GetFmtOut( id->p_f_chain );
}
if( p_stream->p_sys->psz_vf2 )
{
id->p_uf_chain = filter_chain_NewVideo( p_stream, true, &owner );
filter_chain_Reset( id->p_uf_chain, p_fmt_out,
&id->p_encoder->fmt_in );
if( p_fmt_out->video.i_chroma != id->p_encoder->fmt_in.video.i_chroma )
{
filter_chain_AppendConverter( id->p_uf_chain, p_fmt_out,
&id->p_encoder->fmt_in );
}
filter_chain_AppendFromString( id->p_uf_chain, p_stream->p_sys->psz_vf2 );
p_fmt_out = filter_chain_GetFmtOut( id->p_uf_chain );
es_format_Copy( &id->p_encoder->fmt_in, p_fmt_out );
id->p_encoder->fmt_out.video.i_width =
id->p_encoder->fmt_in.video.i_width;
id->p_encoder->fmt_out.video.i_height =
id->p_encoder->fmt_in.video.i_height;
id->p_encoder->fmt_out.video.i_sar_num =
id->p_encoder->fmt_in.video.i_sar_num;
id->p_encoder->fmt_out.video.i_sar_den =
id->p_encoder->fmt_in.video.i_sar_den;
}
/* Keep colorspace etc info along */
id->p_encoder->fmt_in.video.space = id->p_decoder->fmt_out.video.space;
id->p_encoder->fmt_in.video.transfer = id->p_decoder->fmt_out.video.transfer;
id->p_encoder->fmt_in.video.primaries = id->p_decoder->fmt_out.video.primaries;
id->p_encoder->fmt_in.video.b_color_range_full = id->p_decoder->fmt_out.video.b_color_range_full;
}
/* Take care of the scaling and chroma conversions. */
static int conversion_video_filter_append( sout_stream_id_sys_t *id,
picture_t *p_pic )
{
const video_format_t *p_vid_out = video_output_format( id, p_pic );
if( ( p_vid_out->i_chroma != id->p_encoder->fmt_in.video.i_chroma ) ||
( p_vid_out->i_width != id->p_encoder->fmt_in.video.i_width ) ||
( p_vid_out->i_height != id->p_encoder->fmt_in.video.i_height ) )
{
es_format_t fmt_out;
es_format_Init( &fmt_out, VIDEO_ES, p_vid_out->i_chroma );
fmt_out.video = *p_vid_out;
return filter_chain_AppendConverter( id->p_uf_chain ? id->p_uf_chain : id->p_f_chain,
&fmt_out, &id->p_encoder->fmt_in );
}
return VLC_SUCCESS;
}
static void transcode_video_framerate_init( sout_stream_t *p_stream,
sout_stream_id_sys_t *id,
const video_format_t *p_vid_out )
{
/* Handle frame rate conversion */
if( !id->p_encoder->fmt_out.video.i_frame_rate ||
!id->p_encoder->fmt_out.video.i_frame_rate_base )
{
if( p_vid_out->i_frame_rate &&
p_vid_out->i_frame_rate_base )
{
id->p_encoder->fmt_out.video.i_frame_rate =
p_vid_out->i_frame_rate;
id->p_encoder->fmt_out.video.i_frame_rate_base =
p_vid_out->i_frame_rate_base;
}
else
{
/* Pick a sensible default value */
id->p_encoder->fmt_out.video.i_frame_rate = ENC_FRAMERATE;
id->p_encoder->fmt_out.video.i_frame_rate_base = ENC_FRAMERATE_BASE;
}
}
id->p_encoder->fmt_in.video.i_frame_rate =
id->p_encoder->fmt_out.video.i_frame_rate;
id->p_encoder->fmt_in.video.i_frame_rate_base =
id->p_encoder->fmt_out.video.i_frame_rate_base;
vlc_ureduce( &id->p_encoder->fmt_in.video.i_frame_rate,
&id->p_encoder->fmt_in.video.i_frame_rate_base,
id->p_encoder->fmt_in.video.i_frame_rate,
id->p_encoder->fmt_in.video.i_frame_rate_base,
0 );
msg_Dbg( p_stream, "source fps %u/%u, destination %u/%u",
id->p_decoder->fmt_out.video.i_frame_rate,
id->p_decoder->fmt_out.video.i_frame_rate_base,
id->p_encoder->fmt_in.video.i_frame_rate,
id->p_encoder->fmt_in.video.i_frame_rate_base );
}
static void transcode_video_size_init( sout_stream_t *p_stream,
sout_stream_id_sys_t *id,
const video_format_t *p_vid_out )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
/* Calculate scaling
* width/height of source */
int i_src_visible_width = p_vid_out->i_visible_width;
int i_src_visible_height = p_vid_out->i_visible_height;
if (i_src_visible_width == 0)
i_src_visible_width = p_vid_out->i_width;
if (i_src_visible_height == 0)
i_src_visible_height = p_vid_out->i_height;
/* with/height scaling */
float f_scale_width = 1;
float f_scale_height = 1;
/* aspect ratio */
float f_aspect = (double)p_vid_out->i_sar_num *
p_vid_out->i_width /
p_vid_out->i_sar_den /
p_vid_out->i_height;
msg_Dbg( p_stream, "decoder aspect is %f:1", f_aspect );
/* Change f_aspect from source frame to source pixel */
f_aspect = f_aspect * i_src_visible_height / i_src_visible_width;
msg_Dbg( p_stream, "source pixel aspect is %f:1", f_aspect );
/* Calculate scaling factor for specified parameters */
if( id->p_encoder->fmt_out.video.i_visible_width <= 0 &&
id->p_encoder->fmt_out.video.i_visible_height <= 0 && p_sys->f_scale )
{
/* Global scaling. Make sure width will remain a factor of 16 */
float f_real_scale;
int i_new_height;
int i_new_width = i_src_visible_width * p_sys->f_scale;
if( i_new_width % 16 <= 7 && i_new_width >= 16 )
i_new_width -= i_new_width % 16;
else
i_new_width += 16 - i_new_width % 16;
f_real_scale = (float)( i_new_width ) / (float) i_src_visible_width;
i_new_height = __MAX( 16, i_src_visible_height * (float)f_real_scale );
f_scale_width = f_real_scale;
f_scale_height = (float) i_new_height / (float) i_src_visible_height;
}
else if( id->p_encoder->fmt_out.video.i_visible_width > 0 &&
id->p_encoder->fmt_out.video.i_visible_height <= 0 )
{
/* Only width specified */
f_scale_width = (float)id->p_encoder->fmt_out.video.i_visible_width/i_src_visible_width;
f_scale_height = f_scale_width;
}
else if( id->p_encoder->fmt_out.video.i_visible_width <= 0 &&
id->p_encoder->fmt_out.video.i_visible_height > 0 )
{
/* Only height specified */
f_scale_height = (float)id->p_encoder->fmt_out.video.i_visible_height/i_src_visible_height;
f_scale_width = f_scale_height;
}
else if( id->p_encoder->fmt_out.video.i_visible_width > 0 &&
id->p_encoder->fmt_out.video.i_visible_height > 0 )
{
/* Width and height specified */
f_scale_width = (float)id->p_encoder->fmt_out.video.i_visible_width/i_src_visible_width;
f_scale_height = (float)id->p_encoder->fmt_out.video.i_visible_height/i_src_visible_height;
}
/* check maxwidth and maxheight */
if( p_sys->i_maxwidth && f_scale_width > (float)p_sys->i_maxwidth /
i_src_visible_width )
{
f_scale_width = (float)p_sys->i_maxwidth / i_src_visible_width;
}
if( p_sys->i_maxheight && f_scale_height > (float)p_sys->i_maxheight /
i_src_visible_height )
{
f_scale_height = (float)p_sys->i_maxheight / i_src_visible_height;
}
/* Change aspect ratio from source pixel to scaled pixel */
f_aspect = f_aspect * f_scale_height / f_scale_width;
msg_Dbg( p_stream, "scaled pixel aspect is %f:1", f_aspect );
/* f_scale_width and f_scale_height are now final */
/* Calculate width, height from scaling
* Make sure its multiple of 2
*/
/* width/height of output stream */
int i_dst_visible_width = lroundf(f_scale_width*i_src_visible_width);
int i_dst_visible_height = lroundf(f_scale_height*i_src_visible_height);
int i_dst_width = lroundf(f_scale_width*p_vid_out->i_width);
int i_dst_height = lroundf(f_scale_height*p_vid_out->i_height);
if( i_dst_visible_width & 1 ) ++i_dst_visible_width;
if( i_dst_visible_height & 1 ) ++i_dst_visible_height;
if( i_dst_width & 1 ) ++i_dst_width;
if( i_dst_height & 1 ) ++i_dst_height;
/* Store calculated values */
id->p_encoder->fmt_out.video.i_width = i_dst_width;
id->p_encoder->fmt_out.video.i_visible_width = i_dst_visible_width;
id->p_encoder->fmt_out.video.i_height = i_dst_height;
id->p_encoder->fmt_out.video.i_visible_height = i_dst_visible_height;
id->p_encoder->fmt_in.video.i_width = i_dst_width;
id->p_encoder->fmt_in.video.i_visible_width = i_dst_visible_width;
id->p_encoder->fmt_in.video.i_height = i_dst_height;
id->p_encoder->fmt_in.video.i_visible_height = i_dst_visible_height;
msg_Dbg( p_stream, "source %ix%i, destination %ix%i",
i_src_visible_width, i_src_visible_height,
i_dst_visible_width, i_dst_visible_height
);
}
static void transcode_video_sar_init( sout_stream_t *p_stream,
sout_stream_id_sys_t *id,
const video_format_t *p_vid_out )
{
int i_src_visible_width = p_vid_out->i_visible_width;
int i_src_visible_height = p_vid_out->i_visible_height;
if (i_src_visible_width == 0)
i_src_visible_width = p_vid_out->i_width;
if (i_src_visible_height == 0)
i_src_visible_height = p_vid_out->i_height;
/* Check whether a particular aspect ratio was requested */
if( id->p_encoder->fmt_out.video.i_sar_num <= 0 ||
id->p_encoder->fmt_out.video.i_sar_den <= 0 )
{
vlc_ureduce( &id->p_encoder->fmt_out.video.i_sar_num,
&id->p_encoder->fmt_out.video.i_sar_den,
(uint64_t)p_vid_out->i_sar_num * id->p_encoder->fmt_out.video.i_width * p_vid_out->i_height,
(uint64_t)p_vid_out->i_sar_den * id->p_encoder->fmt_out.video.i_height * p_vid_out->i_width,
0 );
}
else
{
vlc_ureduce( &id->p_encoder->fmt_out.video.i_sar_num,
&id->p_encoder->fmt_out.video.i_sar_den,
id->p_encoder->fmt_out.video.i_sar_num,
id->p_encoder->fmt_out.video.i_sar_den,
0 );
}
id->p_encoder->fmt_in.video.i_sar_num =
id->p_encoder->fmt_out.video.i_sar_num;
id->p_encoder->fmt_in.video.i_sar_den =
id->p_encoder->fmt_out.video.i_sar_den;
msg_Dbg( p_stream, "encoder aspect is %i:%i",
id->p_encoder->fmt_out.video.i_sar_num * id->p_encoder->fmt_out.video.i_width,
id->p_encoder->fmt_out.video.i_sar_den * id->p_encoder->fmt_out.video.i_height );
}
static void transcode_video_encoder_init( sout_stream_t *p_stream,
sout_stream_id_sys_t *id,
picture_t *p_pic )
{
const video_format_t *p_vid_out = video_output_format( id, p_pic );
id->p_encoder->fmt_in.video.orientation =
id->p_encoder->fmt_out.video.orientation =
id->p_decoder->fmt_in.video.orientation;
transcode_video_framerate_init( p_stream, id, p_vid_out );
transcode_video_size_init( p_stream, id, p_vid_out );
transcode_video_sar_init( p_stream, id, p_vid_out );
msg_Dbg( p_stream, "source chroma: %4.4s, destination %4.4s",
(const char *)&id->p_decoder->fmt_out.video.i_chroma,
(const char *)&id->p_encoder->fmt_in.video.i_chroma);
}
static int transcode_video_encoder_open( sout_stream_t *p_stream,
sout_stream_id_sys_t *id )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
msg_Dbg( p_stream, "destination (after video filters) %ix%i",
id->p_encoder->fmt_in.video.i_width,
id->p_encoder->fmt_in.video.i_height );
id->p_encoder->p_module =
module_need( id->p_encoder, "encoder", p_sys->psz_venc, true );
if( !id->p_encoder->p_module )
{
msg_Err( p_stream, "cannot find video encoder (module:%s fourcc:%4.4s)",
p_sys->psz_venc ? p_sys->psz_venc : "any",
(char *)&p_sys->i_vcodec );
return VLC_EGENERIC;
}
id->p_encoder->fmt_in.video.i_chroma = id->p_encoder->fmt_in.i_codec;
/* */
id->p_encoder->fmt_out.i_codec =
vlc_fourcc_GetCodec( VIDEO_ES, id->p_encoder->fmt_out.i_codec );
id->id = sout_StreamIdAdd( p_stream->p_next, &id->p_encoder->fmt_out );
if( !id->id )
{
msg_Err( p_stream, "cannot add this stream" );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
void transcode_video_close( sout_stream_t *p_stream,
sout_stream_id_sys_t *id )
{
if( p_stream->p_sys->i_threads >= 1 && !p_stream->p_sys->b_abort )
{
vlc_mutex_lock( &p_stream->p_sys->lock_out );
p_stream->p_sys->b_abort = true;
vlc_cond_signal( &p_stream->p_sys->cond );
vlc_mutex_unlock( &p_stream->p_sys->lock_out );
vlc_join( p_stream->p_sys->thread, NULL );
picture_fifo_Delete( p_stream->p_sys->pp_pics );
block_ChainRelease( p_stream->p_sys->p_buffers );
}
if( p_stream->p_sys->i_threads >= 1 )
{
vlc_mutex_destroy( &p_stream->p_sys->lock_out );
vlc_cond_destroy( &p_stream->p_sys->cond );
}
/* Close decoder */
if( id->p_decoder->p_module )
module_unneed( id->p_decoder, id->p_decoder->p_module );
if( id->p_decoder->p_description )
vlc_meta_Delete( id->p_decoder->p_description );
/* Close encoder */
if( id->p_encoder->p_module )
module_unneed( id->p_encoder, id->p_encoder->p_module );
/* Close filters */
if( id->p_f_chain )
filter_chain_Delete( id->p_f_chain );
if( id->p_uf_chain )
filter_chain_Delete( id->p_uf_chain );
}
static void OutputFrame( sout_stream_t *p_stream, picture_t *p_pic, sout_stream_id_sys_t *id, block_t **out )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
/*
* Encoding
*/
/* Check if we have a subpicture to overlay */
if( p_sys->p_spu )
{
video_format_t fmt = id->p_encoder->fmt_in.video;
if( fmt.i_visible_width <= 0 || fmt.i_visible_height <= 0 )
{
fmt.i_visible_width = fmt.i_width;
fmt.i_visible_height = fmt.i_height;
fmt.i_x_offset = 0;
fmt.i_y_offset = 0;
}
subpicture_t *p_subpic = spu_Render( p_sys->p_spu, NULL, &fmt,
&id->p_decoder->fmt_out.video,
p_pic->date, p_pic->date, false );
/* Overlay subpicture */
if( p_subpic )
{
if( filter_chain_IsEmpty( id->p_f_chain ) )
{
/* We can't modify the picture, we need to duplicate it,
* in this point the picture is already p_encoder->fmt.in format*/
picture_t *p_tmp = video_new_buffer_encoder( id->p_encoder );
if( likely( p_tmp ) )
{
picture_Copy( p_tmp, p_pic );
picture_Release( p_pic );
p_pic = p_tmp;
}
}
if( unlikely( !p_sys->p_spu_blend ) )
p_sys->p_spu_blend = filter_NewBlend( VLC_OBJECT( p_sys->p_spu ), &fmt );
if( likely( p_sys->p_spu_blend ) )
picture_BlendSubpicture( p_pic, p_sys->p_spu_blend, p_subpic );
subpicture_Delete( p_subpic );
}
}
if( p_sys->i_threads == 0 )
{
block_t *p_block;
p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );
block_ChainAppend( out, p_block );
}
if( p_sys->i_threads )
{
vlc_sem_wait( &p_sys->picture_pool_has_room );
vlc_mutex_lock( &p_sys->lock_out );
picture_fifo_Push( p_sys->pp_pics, p_pic );
vlc_cond_signal( &p_sys->cond );
vlc_mutex_unlock( &p_sys->lock_out );
}
if ( p_sys->i_threads == 0 )
picture_Release( p_pic );
}
int transcode_video_process( sout_stream_t *p_stream, sout_stream_id_sys_t *id,
block_t *in, block_t **out )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
*out = NULL;
int ret = id->p_decoder->pf_decode( id->p_decoder, in );
if( ret != VLCDEC_SUCCESS )
return VLC_EGENERIC;
picture_t *p_pics = transcode_dequeue_all_pics( id );
if( p_pics == NULL )
goto end;
do
{
picture_t *p_pic = p_pics;
p_pics = p_pics->p_next;
p_pic->p_next = NULL;
if( id->b_error )
{
picture_Release( p_pic );
continue;
}
if( unlikely (
id->p_encoder->p_module && p_pic &&
!video_format_IsSimilar( &id->fmt_input_video, &p_pic->format )
)
)
{
msg_Info( p_stream, "aspect-ratio changed, reiniting. %i -> %i : %i -> %i.",
id->fmt_input_video.i_sar_num, p_pic->format.i_sar_num,
id->fmt_input_video.i_sar_den, p_pic->format.i_sar_den
);
/* Close filters */
if( id->p_f_chain )
filter_chain_Delete( id->p_f_chain );
id->p_f_chain = NULL;
if( id->p_uf_chain )
filter_chain_Delete( id->p_uf_chain );
id->p_uf_chain = NULL;
/* Reinitialize filters */
id->p_encoder->fmt_out.video.i_visible_width = p_sys->i_width & ~1;
id->p_encoder->fmt_out.video.i_visible_height = p_sys->i_height & ~1;
id->p_encoder->fmt_out.video.i_sar_num = id->p_encoder->fmt_out.video.i_sar_den = 0;
transcode_video_encoder_init( p_stream, id, p_pic );
transcode_video_filter_init( p_stream, id );
if( conversion_video_filter_append( id, p_pic ) != VLC_SUCCESS )
goto error;
memcpy( &id->fmt_input_video, &p_pic->format, sizeof(video_format_t));
}
if( unlikely( !id->p_encoder->p_module && p_pic ) )
{
if( id->p_f_chain )
filter_chain_Delete( id->p_f_chain );
if( id->p_uf_chain )
filter_chain_Delete( id->p_uf_chain );
id->p_f_chain = id->p_uf_chain = NULL;
transcode_video_encoder_init( p_stream, id, p_pic );
transcode_video_filter_init( p_stream, id );
if( conversion_video_filter_append( id, p_pic ) != VLC_SUCCESS )
goto error;
memcpy( &id->fmt_input_video, &p_pic->format, sizeof(video_format_t));
if( transcode_video_encoder_open( p_stream, id ) != VLC_SUCCESS )
goto error;
}
/* Run the filter and output chains; first with the picture,
* and then with NULL as many times as we need until they
* stop outputting frames.
*/
for ( ;; ) {
picture_t *p_filtered_pic = p_pic;
/* Run filter chain */
if( id->p_f_chain )
p_filtered_pic = filter_chain_VideoFilter( id->p_f_chain, p_filtered_pic );
if( !p_filtered_pic )
break;
for ( ;; ) {
picture_t *p_user_filtered_pic = p_filtered_pic;
/* Run user specified filter chain */
if( id->p_uf_chain )
p_user_filtered_pic = filter_chain_VideoFilter( id->p_uf_chain, p_user_filtered_pic );
if( !p_user_filtered_pic )
break;
OutputFrame( p_stream, p_user_filtered_pic, id, out );
p_filtered_pic = NULL;
}
p_pic = NULL;
}
continue;
error:
if( p_pic )
picture_Release( p_pic );
id->b_error = true;
} while( p_pics );
if( p_sys->i_threads >= 1 )
{
/* Pick up any return data the encoder thread wants to output. */
vlc_mutex_lock( &p_sys->lock_out );
*out = p_sys->p_buffers;
p_sys->p_buffers = NULL;
vlc_mutex_unlock( &p_sys->lock_out );
}
end:
/* Drain encoder */
if( unlikely( !id->b_error && in == NULL ) )
{
if( p_sys->i_threads == 0 )
{
if( id->p_encoder->p_module )
{
block_t *p_block;
do {
p_block = id->p_encoder->pf_encode_video(id->p_encoder, NULL );
block_ChainAppend( out, p_block );
} while( p_block );
}
}
else
{
msg_Dbg( p_stream, "Flushing thread and waiting that");
vlc_mutex_lock( &p_stream->p_sys->lock_out );
p_stream->p_sys->b_abort = true;
vlc_cond_signal( &p_stream->p_sys->cond );
vlc_mutex_unlock( &p_stream->p_sys->lock_out );
vlc_join( p_stream->p_sys->thread, NULL );
vlc_mutex_lock( &p_sys->lock_out );
*out = p_sys->p_buffers;
p_sys->p_buffers = NULL;
vlc_mutex_unlock( &p_sys->lock_out );
msg_Dbg( p_stream, "Flushing done");
}
}
return id->b_error ? VLC_EGENERIC : VLC_SUCCESS;
}
bool transcode_video_add( sout_stream_t *p_stream, const es_format_t *p_fmt,
sout_stream_id_sys_t *id )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
msg_Dbg( p_stream,
"creating video transcoding from fcc=`%4.4s' to fcc=`%4.4s'",
(char*)&p_fmt->i_codec, (char*)&p_sys->i_vcodec );
id->fifo.pic.first = NULL;
id->fifo.pic.last = &id->fifo.pic.first;
/* Complete destination format */
id->p_encoder->fmt_out.i_codec = p_sys->i_vcodec;
id->p_encoder->fmt_out.video.i_visible_width = p_sys->i_width & ~1;
id->p_encoder->fmt_out.video.i_visible_height = p_sys->i_height & ~1;
id->p_encoder->fmt_out.i_bitrate = p_sys->i_vbitrate;
/* Build decoder -> filter -> encoder chain */
if( transcode_video_new( p_stream, id ) )
{
msg_Err( p_stream, "cannot create video chain" );
return false;
}
/* Stream will be added later on because we don't know
* all the characteristics of the decoded stream yet */
id->b_transcode = true;
if( p_sys->fps_num )
{
id->p_encoder->fmt_in.video.i_frame_rate = id->p_encoder->fmt_out.video.i_frame_rate = (p_sys->fps_num );
id->p_encoder->fmt_in.video.i_frame_rate_base = id->p_encoder->fmt_out.video.i_frame_rate_base = (p_sys->fps_den ? p_sys->fps_den : 1);
}
return true;
}