1 /*****************************************************************************
2 * switcher.c: MPEG2 video switcher module
3 *****************************************************************************
4 * Copyright (C) 2004 the VideoLAN team
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
36 #include <vlc_avcodec.h>
37 #include <vlc_filter.h>
40 #include <vlc_block.h>
43 #include <vlc_network.h>
46 #ifdef HAVE_LIBAVCODEC_AVCODEC_H
47 # include <libavcodec/avcodec.h>
48 #elif defined(HAVE_FFMPEG_AVCODEC_H)
49 # include <ffmpeg/avcodec.h>
54 #include "../codec/avcodec/avcodec.h"
55 #include "../codec/avcodec/avcommon.h"
57 #define SOUT_CFG_PREFIX "sout-switcher-"
58 #define MAX_PICTURES 10
60 #define MAX_THRESHOLD 99999999
62 /*****************************************************************************
64 *****************************************************************************/
65 static int Open ( vlc_object_t * );
66 static void Close ( vlc_object_t * );
68 static sout_stream_id_t *Add( sout_stream_t *, es_format_t * );
69 static int Del( sout_stream_t *, sout_stream_id_t * );
70 static int Send( sout_stream_t *, sout_stream_id_t *, block_t * );
72 static mtime_t Process( sout_stream_t *p_stream, sout_stream_id_t *id,
74 static int UnpackFromFile( sout_stream_t *p_stream, const char *psz_file,
75 int i_width, int i_height,
77 static void NetCommand( sout_stream_t *p_stream );
78 static mtime_t VideoCommand( sout_stream_t *p_stream, sout_stream_id_t *id );
79 static block_t *VideoGetBuffer( sout_stream_t *p_stream, sout_stream_id_t *id,
81 static block_t *AudioGetBuffer( sout_stream_t *p_stream, sout_stream_id_t *id,
84 /*****************************************************************************
86 *****************************************************************************/
87 #define FILES_TEXT N_("Files")
88 #define FILES_LONGTEXT N_( \
89 "Full paths of the files separated by colons." )
90 #define SIZES_TEXT N_("Sizes")
91 #define SIZES_LONGTEXT N_( \
92 "List of sizes separated by colons (720x576:480x576)." )
93 #define RATIO_TEXT N_("Aspect ratio")
94 #define RATIO_LONGTEXT N_( \
95 "Aspect ratio (4:3, 16:9)." )
96 #define PORT_TEXT N_("Command UDP port")
97 #define PORT_LONGTEXT N_( \
98 "UDP port to listen to for commands." )
99 #define COMMAND_TEXT N_("Command")
100 #define COMMAND_LONGTEXT N_( \
101 "Initial command to execute." )
102 #define GOP_TEXT N_("GOP size")
103 #define GOP_LONGTEXT N_( \
104 "Number of P frames between two I frames." )
105 #define QSCALE_TEXT N_("Quantizer scale")
106 #define QSCALE_LONGTEXT N_( \
107 "Fixed quantizer scale to use." )
108 #define AUDIO_TEXT N_("Mute audio")
109 #define AUDIO_LONGTEXT N_( \
110 "Mute audio when command is not 0." )
113 set_description( N_("MPEG2 video switcher stream output") )
114 set_capability( "sout stream", 50 )
115 add_shortcut( "switcher" )
116 set_callbacks( Open, Close )
118 add_string( SOUT_CFG_PREFIX "files", "", FILES_TEXT,
119 FILES_LONGTEXT, false )
120 add_string( SOUT_CFG_PREFIX "sizes", "", SIZES_TEXT,
121 SIZES_LONGTEXT, false )
122 add_string( SOUT_CFG_PREFIX "aspect-ratio", "4:3", RATIO_TEXT,
123 RATIO_LONGTEXT, false )
124 add_integer( SOUT_CFG_PREFIX "port", 5001,
125 PORT_TEXT, PORT_LONGTEXT, true )
126 add_integer( SOUT_CFG_PREFIX "command", 0,
127 COMMAND_TEXT, COMMAND_LONGTEXT, true )
128 add_integer( SOUT_CFG_PREFIX "gop", 8,
129 GOP_TEXT, GOP_LONGTEXT, true )
130 add_integer( SOUT_CFG_PREFIX "qscale", 5,
131 QSCALE_TEXT, QSCALE_LONGTEXT, true )
132 add_bool( SOUT_CFG_PREFIX "mute-audio", true,
133 AUDIO_TEXT, AUDIO_LONGTEXT, true )
134 #if LIBAVCODEC_VERSION_MAJOR >= 54
135 add_string( SOUT_CFG_PREFIX "options", NULL,
136 AV_OPTIONS_TEXT, AV_OPTIONS_LONGTEXT, true )
140 static const char *const ppsz_sout_options[] = {
141 "files", "sizes", "aspect-ratio", "port", "command", "gop", "qscale",
142 "mute-audio", "options", NULL
145 struct sout_stream_sys_t
150 sout_stream_id_t *pp_audio_ids[MAX_AUDIO];
154 picture_t p_pictures[MAX_PICTURES];
159 int i_cmd, i_old_cmd;
161 #if LIBAVCODEC_VERSION_MAJOR >= 54
162 AVDictionary *options;
166 struct sout_stream_id_t
169 bool b_switcher_video;
170 bool b_switcher_audio;
176 AVCodecContext *ff_enc_c;
178 uint8_t *p_buffer_out;
183 /*****************************************************************************
185 *****************************************************************************/
186 static int Open( vlc_object_t *p_this )
188 sout_stream_t *p_stream = (sout_stream_t*)p_this;
189 sout_stream_sys_t *p_sys;
191 char *psz_files, *psz_sizes;
192 int i_height = 0, i_width = 0;
196 p_sys = calloc( 1, sizeof(sout_stream_sys_t) );
200 if( !p_stream->p_next )
202 msg_Err( p_stream, "cannot create chain" );
207 config_ChainParse( p_stream, SOUT_CFG_PREFIX, ppsz_sout_options,
210 var_Get( p_stream, SOUT_CFG_PREFIX "files", &val );
211 psz_files = val.psz_string;
212 var_Get( p_stream, SOUT_CFG_PREFIX "sizes", &val );
213 psz_sizes = val.psz_string;
215 p_sys->i_nb_pictures = 0;
216 while ( psz_files && *psz_files )
218 char * psz_file = psz_files;
219 char * psz_size = psz_sizes;
221 while ( *psz_files && *psz_files != ':' )
223 if ( *psz_files == ':' )
228 while ( *psz_sizes && *psz_sizes != ':' )
230 if ( *psz_sizes == ':' )
232 if ( sscanf( psz_size, "%dx%d", &i_width, &i_height ) != 2 )
234 msg_Err( p_stream, "bad size %s for file %s", psz_size,
241 if ( UnpackFromFile( p_stream, psz_file, i_width, i_height,
242 &p_sys->p_pictures[p_sys->i_nb_pictures] ) < 0 )
247 p_sys->i_nb_pictures++;
250 var_Get( p_stream, SOUT_CFG_PREFIX "aspect-ratio", &val );
251 if ( val.psz_string )
253 char *psz_parser = strchr( val.psz_string, ':' );
257 *psz_parser++ = '\0';
258 p_sys->i_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
259 / atoi( psz_parser );
263 msg_Warn( p_stream, "bad aspect ratio %s", val.psz_string );
264 p_sys->i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
267 free( val.psz_string );
271 p_sys->i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
274 var_Get( p_stream, SOUT_CFG_PREFIX "port", &val );
275 p_sys->i_fd = net_ListenUDP1( VLC_OBJECT(p_stream), NULL, val.i_int );
276 if ( p_sys->i_fd < 0 )
282 var_Get( p_stream, SOUT_CFG_PREFIX "command", &val );
283 p_sys->i_cmd = val.i_int;
284 p_sys->i_old_cmd = 0;
286 var_Get( p_stream, SOUT_CFG_PREFIX "gop", &val );
287 p_sys->i_gop = val.i_int;
289 var_Get( p_stream, SOUT_CFG_PREFIX "qscale", &val );
290 p_sys->i_qscale = val.i_int;
292 var_Get( p_stream, SOUT_CFG_PREFIX "mute-audio", &val );
293 p_sys->b_audio = val.b_bool;
295 p_stream->pf_add = Add;
296 p_stream->pf_del = Del;
297 p_stream->pf_send = Send;
298 p_stream->p_sys = p_sys;
300 #if LIBAVCODEC_VERSION_MAJOR >= 54
301 char *psz_opts = var_InheritString( p_stream, SOUT_CFG_PREFIX "options" );
302 if (psz_opts && *psz_opts) {
303 p_sys->options = vlc_av_get_options(psz_opts);
305 p_sys->options = NULL;
313 /*****************************************************************************
315 *****************************************************************************/
316 static void Close( vlc_object_t * p_this )
318 sout_stream_t *p_stream = (sout_stream_t *)p_this;
319 sout_stream_sys_t *p_sys = p_stream->p_sys;
321 #if LIBAVCODEC_VERSION_MAJOR >= 54
322 av_dict_free( &p_sys->options );
328 /*****************************************************************************
329 * Add: Add an input elementary stream
330 *****************************************************************************/
331 static sout_stream_id_t *Add( sout_stream_t *p_stream, es_format_t *p_fmt )
333 sout_stream_sys_t *p_sys = p_stream->p_sys;
334 sout_stream_id_t *id;
336 id = calloc( 1, sizeof( sout_stream_id_t ) );
340 if( p_fmt->i_cat == VIDEO_ES && p_fmt->i_codec == VLC_CODEC_MPGV )
342 id->b_switcher_video = true;
343 p_fmt->i_codec = VLC_CODEC_MPGV;
344 msg_Dbg( p_stream, "creating video switcher for fcc=`%4.4s' cmd:%d",
345 (char*)&p_fmt->i_codec, p_sys->i_cmd );
347 else if ( p_fmt->i_cat == AUDIO_ES &&
348 p_fmt->i_codec == VLC_CODEC_MPGA &&
351 int i_ff_codec = CODEC_ID_MP2;
354 id->b_switcher_audio = true;
355 msg_Dbg( p_stream, "creating audio switcher for fcc=`%4.4s' cmd:%d",
356 (char*)&p_fmt->i_codec, p_sys->i_cmd );
358 /* Allocate the encoder right now. */
359 if( i_ff_codec == 0 )
361 msg_Err( p_stream, "cannot find encoder" );
366 id->ff_enc = avcodec_find_encoder( i_ff_codec );
369 msg_Err( p_stream, "cannot find encoder (avcodec)" );
374 #if LIBAVCODEC_VERSION_MAJOR < 54
375 id->ff_enc_c = avcodec_alloc_context();
377 id->ff_enc_c = avcodec_alloc_context3( id->ff_enc );
379 id->ff_enc_c->dsp_mask = GetVlcDspMask();
380 id->ff_enc_c->sample_rate = p_fmt->audio.i_rate;
381 id->ff_enc_c->time_base.num = 1;
382 id->ff_enc_c->time_base.den = p_fmt->audio.i_rate;
383 id->ff_enc_c->channels = p_fmt->audio.i_channels;
384 id->ff_enc_c->bit_rate = p_fmt->i_bitrate;
387 #if LIBAVCODEC_VERSION_MAJOR >= 54
388 AVDictionary *options = NULL;
390 av_dict_copy(&options, p_sys->options, 0);
392 ret = avcodec_open2( id->ff_enc_c, id->ff_enc, options ? &options : NULL );
393 vlc_avcodec_unlock();
394 AVDictionaryEntry *t = NULL;
395 while ((t = av_dict_get(options, "", t, AV_DICT_IGNORE_SUFFIX))) {
396 msg_Err( p_stream, "Unknown option \"%s\"", t->key );
398 av_dict_free(&options);
401 ret = avcodec_open( id->ff_enc_c, id->ff_enc );
402 vlc_avcodec_unlock();
407 msg_Err( p_stream, "cannot open encoder" );
408 av_free( id->ff_enc_c );
413 id->p_buffer_out = malloc( AVCODEC_MAX_AUDIO_FRAME_SIZE * 2 );
414 id->p_samples = calloc( id->ff_enc_c->frame_size * p_fmt->audio.i_channels,
416 if( !id->p_buffer_out || !id->p_samples )
419 for( i = 0; i < MAX_AUDIO; i++ )
421 if( p_sys->pp_audio_ids[i] == NULL )
423 p_sys->pp_audio_ids[i] = id;
429 msg_Err( p_stream, "too many audio streams!" );
435 msg_Dbg( p_stream, "do not know what to do when switching (fcc=`%4.4s')",
436 (char*)&p_fmt->i_codec );
440 memcpy( &id->f_src, p_fmt, sizeof( es_format_t ) );
442 /* open output stream */
443 id->id = p_stream->p_next->pf_add( p_stream->p_next, p_fmt );
450 avcodec_close( id->ff_enc_c );
451 vlc_avcodec_unlock();
452 free( id->p_samples );
453 free( id->p_buffer_out );
454 av_free( id->ff_enc_c );
459 /*****************************************************************************
460 * Del: Del an elementary stream
461 *****************************************************************************/
462 static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
464 sout_stream_sys_t *p_sys = p_stream->p_sys;
466 if ( id->b_switcher_audio )
469 for ( i = 0; i < MAX_AUDIO; i++ )
471 if ( p_sys->pp_audio_ids[i] == id )
473 p_sys->pp_audio_ids[i] = NULL;
482 avcodec_close( id->ff_enc_c );
483 vlc_avcodec_unlock();
484 av_free( id->ff_enc_c );
485 av_free( id->p_frame );
486 free( id->p_buffer_out );
491 p_stream->p_next->pf_del( p_stream->p_next, id->id );
498 /*****************************************************************************
499 * Send: Process an input packet
500 *****************************************************************************/
501 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
504 sout_stream_sys_t *p_sys = p_stream->p_sys;
508 block_Release( p_buffer );
512 if ( !id->b_switcher_video && !id->b_switcher_audio )
514 return p_stream->p_next->pf_send( p_stream->p_next, id->id, p_buffer );
517 block_ChainAppend( &id->p_queued, p_buffer );
519 if ( id->b_switcher_video )
521 /* Check for commands for every video frame. */
522 NetCommand( p_stream );
524 while ( id->p_queued != NULL )
528 if ( p_sys->i_old_cmd != p_sys->i_cmd )
530 i_dts = VideoCommand( p_stream, id );
533 i_dts = Process( p_stream, id, i_dts );
535 for ( int i = 0; i < MAX_AUDIO; i++ )
537 if ( p_sys->pp_audio_ids[i] != NULL )
538 Process( p_stream, p_sys->pp_audio_ids[i], i_dts );
546 /*****************************************************************************
547 * Process: Process and dispatch buffers
548 *****************************************************************************/
549 static mtime_t Process( sout_stream_t *p_stream, sout_stream_id_t *id,
552 sout_stream_sys_t *p_sys = p_stream->p_sys;
554 block_t *p_blocks = NULL;
555 block_t *p_blocks_out = NULL;
557 /* Find out the blocks we need. */
558 while ( id->p_queued != NULL
559 && (!i_max_dts || id->p_queued->i_dts <= i_max_dts) )
561 block_t *p_next = id->p_queued->p_next;
562 id->p_queued->p_next = NULL;
563 i_dts = id->p_queued->i_dts;
564 block_ChainAppend( &p_blocks, id->p_queued );
565 id->p_queued = p_next;
568 if ( p_sys->i_old_cmd == 0 )
571 if ( p_blocks != NULL )
572 p_stream->p_next->pf_send( p_stream->p_next, id->id, p_blocks );
576 if ( p_sys->i_old_cmd == -1 )
578 /* No output at all */
579 while ( p_blocks != NULL )
581 block_t * p_next = p_blocks->p_next;
582 block_Release( p_blocks );
588 while ( p_blocks != NULL )
590 block_t * p_next = p_blocks->p_next;
593 if ( id->b_switcher_video )
595 p_out = VideoGetBuffer( p_stream, id, p_blocks );
599 p_out = AudioGetBuffer( p_stream, id, p_blocks );
604 block_ChainAppend( &p_blocks_out, p_out );
608 if ( p_blocks_out != NULL )
609 p_stream->p_next->pf_send( p_stream->p_next, id->id, p_blocks_out );
613 /*****************************************************************************
614 * UnpackFromFile: Read a YUV picture and store it in our format
615 *****************************************************************************/
616 static int UnpackFromFile( sout_stream_t *p_stream, const char *psz_file,
617 int i_width, int i_height,
621 FILE *p_file = vlc_fopen( psz_file, "r" );
623 if ( p_file == NULL )
625 msg_Err( p_stream, "file %s not found", psz_file );
629 if( picture_Setup( p_pic, VLC_CODEC_I420,
630 i_width, i_height, 1, 1 ) )
632 msg_Err( p_stream, "unknown chroma" );
635 for ( i = 0; i < p_pic->i_planes; i++ )
637 p_pic->p[i].p_pixels = malloc( p_pic->p[i].i_lines *
638 p_pic->p[i].i_pitch );
639 memset( p_pic->p[i].p_pixels, 0, p_pic->p[i].i_lines *
640 p_pic->p[i].i_pitch );
643 for ( i = 0; i < i_height; i++ )
646 uint8_t p_buffer[i_width * 2];
647 uint8_t *p_char = p_buffer;
648 uint8_t *p_y = &p_pic->p[0].p_pixels[i * p_pic->p[0].i_pitch];
649 uint8_t *p_u = &p_pic->p[1].p_pixels[i/2 * p_pic->p[1].i_pitch];
650 uint8_t *p_v = &p_pic->p[2].p_pixels[i/2 * p_pic->p[2].i_pitch];
652 if ( fread( p_buffer, 2, i_width, p_file ) != (size_t)i_width )
654 msg_Err( p_stream, "premature end of file %s", psz_file );
656 for ( i = 0; i < p_pic->i_planes; i++ )
658 free( p_pic->p[i].p_pixels );
664 for ( j = 0; j < i_width; j++ )
666 uint8_t **pp_chroma = i_chroma ? &p_v : &p_u;
667 i_chroma = !i_chroma;
669 **pp_chroma = (**pp_chroma + *p_char + 1) / 2;
671 **pp_chroma = *p_char;
682 /*****************************************************************************
683 * NetCommand: Get a command from the network
684 *****************************************************************************/
685 static void NetCommand( sout_stream_t *p_stream )
687 sout_stream_sys_t *p_sys = p_stream->p_sys;
689 int i_len = recv( p_sys->i_fd, psz_buffer, sizeof( psz_buffer ) - 1, 0 );
693 psz_buffer[i_len] = '\0';
694 int i_cmd = strtol( psz_buffer, NULL, 0 );
695 if ( i_cmd < -1 || i_cmd > p_sys->i_nb_pictures )
697 msg_Err( p_stream, "got a wrong command (%d)", i_cmd );
701 p_sys->i_cmd = i_cmd;
703 msg_Dbg( p_stream, "new command: %d old:%d", p_sys->i_cmd,
708 /*****************************************************************************
709 * VideoCommand: Create/Delete a video encoder
710 *****************************************************************************/
711 static mtime_t VideoCommand( sout_stream_t *p_stream, sout_stream_id_t *id )
713 sout_stream_sys_t *p_sys = p_stream->p_sys;
715 if ( p_sys->i_cmd == 0 && !(id->p_queued->i_flags & BLOCK_FLAG_TYPE_I) )
717 mtime_t i_dts = id->p_queued->i_dts;
718 block_t *p_block = id->p_queued->p_next;
720 while ( p_block != NULL )
722 if ( p_block->i_flags & BLOCK_FLAG_TYPE_I )
724 i_dts = p_block->i_dts;
725 p_block = p_block->p_next;
731 p_sys->i_old_cmd = p_sys->i_cmd;
736 avcodec_close( id->ff_enc_c );
737 vlc_avcodec_unlock();
738 av_free( id->ff_enc_c );
739 av_free( id->p_frame );
740 free( id->p_buffer_out );
744 if ( p_sys->i_cmd > 0 )
746 /* Create a new encoder. */
747 int i_ff_codec = CODEC_ID_MPEG2VIDEO;
748 int i_aspect_num, i_aspect_den;
750 if( i_ff_codec == 0 )
752 msg_Err( p_stream, "cannot find encoder" );
756 id->ff_enc = avcodec_find_encoder( i_ff_codec );
759 msg_Err( p_stream, "cannot find encoder (avcodec)" );
763 #if LIBAVCODEC_VERSION_MAJOR < 54
764 id->ff_enc_c = avcodec_alloc_context();
766 id->ff_enc_c = avcodec_alloc_context3( id->ff_enc );
768 id->ff_enc_c->dsp_mask = GetVlcDspMask();
769 id->ff_enc_c->width = p_sys->p_pictures[p_sys->i_cmd-1].format.i_width;
770 id->ff_enc_c->height = p_sys->p_pictures[p_sys->i_cmd-1].format.i_height;
771 av_reduce( &i_aspect_num, &i_aspect_den,
773 VOUT_ASPECT_FACTOR, 1 << 30 /* something big */ );
774 av_reduce( &id->ff_enc_c->sample_aspect_ratio.num,
775 &id->ff_enc_c->sample_aspect_ratio.den,
776 i_aspect_num * (int64_t)id->ff_enc_c->height,
777 i_aspect_den * (int64_t)id->ff_enc_c->width, 1 << 30 );
779 #if LIBAVCODEC_BUILD >= 4754
780 id->ff_enc_c->time_base.num = 1;
781 id->ff_enc_c->time_base.den = 25; /* FIXME */
783 id->ff_enc_c->frame_rate = 25; /* FIXME */
784 id->ff_enc_c->frame_rate_base = 1;
787 id->ff_enc_c->gop_size = 200;
788 id->ff_enc_c->max_b_frames = 0;
790 id->ff_enc_c->flags |= CODEC_FLAG_QSCALE
791 | CODEC_FLAG_INPUT_PRESERVED
792 | CODEC_FLAG_LOW_DELAY;
794 id->ff_enc_c->mb_decision = FF_MB_DECISION_SIMPLE;
795 id->ff_enc_c->pix_fmt = PIX_FMT_YUV420P;
799 #if LIBAVCODEC_VERSION_MAJOR >= 54
800 AVDictionary *options = NULL;
802 av_dict_copy(&options, p_sys->options, 0);
803 ret = avcodec_open2( id->ff_enc_c, id->ff_enc, options ? &options : NULL );
805 ret = avcodec_open( id->ff_enc_c, id->ff_enc );
807 vlc_avcodec_unlock();
808 #if LIBAVCODEC_VERSION_MAJOR >= 54
809 AVDictionaryEntry *t = NULL;
810 while ((t = av_dict_get(options, "", t, AV_DICT_IGNORE_SUFFIX))) {
811 msg_Err( p_stream, "Unknown option \"%s\"", t->key );
813 av_dict_free(&options);
817 msg_Err( p_stream, "cannot open encoder" );
821 id->p_buffer_out = malloc( id->ff_enc_c->width * id->ff_enc_c->height * 3 );
822 id->p_frame = avcodec_alloc_frame();
823 id->p_frame->linesize[0] = p_sys->p_pictures[p_sys->i_cmd-1].p[0].i_pitch;
824 id->p_frame->linesize[1] = p_sys->p_pictures[p_sys->i_cmd-1].p[1].i_pitch;
825 id->p_frame->linesize[2] = p_sys->p_pictures[p_sys->i_cmd-1].p[2].i_pitch;
826 id->p_frame->data[0] = p_sys->p_pictures[p_sys->i_cmd-1].p[0].p_pixels;
827 id->p_frame->data[1] = p_sys->p_pictures[p_sys->i_cmd-1].p[1].p_pixels;
828 id->p_frame->data[2] = p_sys->p_pictures[p_sys->i_cmd-1].p[2].p_pixels;
830 id->i_nb_pred = p_sys->i_gop;
836 /*****************************************************************************
837 * VideoGetBuffer: Build an alternate video buffer
838 *****************************************************************************/
839 static block_t *VideoGetBuffer( sout_stream_t *p_stream, sout_stream_id_t *id,
842 sout_stream_sys_t *p_sys = p_stream->p_sys;
846 id->p_frame->quality = p_sys->i_qscale * powf(2.0, FF_LAMBDA_SHIFT + 7.0)
848 id->p_frame->interlaced_frame = 0;
849 id->p_frame->top_field_first = 1;
850 id->p_frame->pts = p_buffer->i_dts;
852 if ( id->i_nb_pred >= p_sys->i_gop )
854 id->p_frame->pict_type = AV_PICTURE_TYPE_I;
856 id->p_frame->me_threshold = 0;
857 id->p_frame->mb_threshold = 0;
863 id->p_frame->pict_type = AV_PICTURE_TYPE_P;
865 if ( id->p_frame->mb_type != NULL )
867 id->p_frame->me_threshold = MAX_THRESHOLD;
868 id->p_frame->mb_threshold = MAX_THRESHOLD;
874 i_out = avcodec_encode_video( id->ff_enc_c, id->p_buffer_out,
875 id->ff_enc_c->width * id->ff_enc_c->height * 3,
882 if ( id->p_frame->mb_type == NULL
883 && id->ff_enc_c->coded_frame->pict_type != AV_PICTURE_TYPE_I )
885 int mb_width = (id->ff_enc_c->width + 15) / 16;
886 int mb_height = (id->ff_enc_c->height + 15) / 16;
887 int h_chroma_shift, v_chroma_shift;
890 avcodec_get_chroma_sub_sample( id->ff_enc_c->pix_fmt, &h_chroma_shift,
893 id->p_frame->motion_subsample_log2
894 = id->ff_enc_c->coded_frame->motion_subsample_log2;
895 id->p_frame->mb_type = malloc( ((mb_width + 1) * (mb_height + 1) + 1)
896 * sizeof(uint32_t) );
897 memcpy( id->p_frame->mb_type, id->ff_enc_c->coded_frame->mb_type,
898 (mb_width + 1) * mb_height * sizeof(id->p_frame->mb_type[0]));
900 for ( i = 0; i < 2; i++ )
902 int stride = ((16 * mb_width )
903 >> id->ff_enc_c->coded_frame->motion_subsample_log2) + 1;
904 int height = ((16 * mb_height)
905 >> id->ff_enc_c->coded_frame->motion_subsample_log2);
906 int b8_stride = mb_width * 2 + 1;
908 if ( id->ff_enc_c->coded_frame->motion_val[i] )
910 id->p_frame->motion_val[i] = malloc( 2 * stride * height
912 memcpy( id->p_frame->motion_val[i],
913 id->ff_enc_c->coded_frame->motion_val[i],
914 2 * stride * height * sizeof(int16_t) );
916 if ( id->ff_enc_c->coded_frame->ref_index[i] )
918 id->p_frame->ref_index[i] = malloc( b8_stride * 2 * mb_height
920 memcpy( id->p_frame->ref_index[i],
921 id->ff_enc_c->coded_frame->ref_index[i],
922 b8_stride * 2 * mb_height * sizeof(int8_t));
928 p_out = block_Alloc( i_out );
929 memcpy( p_out->p_buffer, id->p_buffer_out, i_out );
930 p_out->i_length = p_buffer->i_length;
931 p_out->i_pts = p_buffer->i_dts;
932 p_out->i_dts = p_buffer->i_dts;
934 switch ( id->ff_enc_c->coded_frame->pict_type )
936 case AV_PICTURE_TYPE_I:
937 p_out->i_flags |= BLOCK_FLAG_TYPE_I;
939 case AV_PICTURE_TYPE_P:
940 p_out->i_flags |= BLOCK_FLAG_TYPE_P;
942 case AV_PICTURE_TYPE_B:
943 p_out->i_flags |= BLOCK_FLAG_TYPE_B;
949 block_Release( p_buffer );
954 /*****************************************************************************
955 * AudioGetBuffer: Build an alternate audio buffer
956 *****************************************************************************/
957 static block_t *AudioGetBuffer( sout_stream_t *p_stream, sout_stream_id_t *id,
964 i_out = avcodec_encode_audio( id->ff_enc_c, id->p_buffer_out,
965 2 * AVCODEC_MAX_AUDIO_FRAME_SIZE,
971 p_out = block_Alloc( i_out );
972 memcpy( p_out->p_buffer, id->p_buffer_out, i_out );
973 p_out->i_length = p_buffer->i_length;
974 p_out->i_pts = p_buffer->i_dts;
975 p_out->i_dts = p_buffer->i_dts;
977 block_Release( p_buffer );