static ssize_t WritePipe(sout_access_out_t *access, block_t *block)
{
int fd = (intptr_t)access->p_sys;
ssize_t total = 0;
while (block != NULL)
{
if (block->i_buffer == 0)
{
block_t *next = block->p_next;
block_Release(block);
block = next;
continue;
}
/* TODO: vectorized I/O with writev() */
ssize_t val = vlc_write(fd, block->p_buffer, block->i_buffer);
if (val < 0)
{
if (errno == EINTR)
continue;
block_ChainRelease(block);
msg_Err(access, "cannot write: %s", vlc_strerror_c(errno));
total = -1;
break;
}
total += val;
assert((size_t)val <= block->i_buffer);
block->p_buffer += val;
block->i_buffer -= val;
}
return total;
}
/*****************************************************************************
* Render: displays previously rendered output
*****************************************************************************
* This function send the currently rendered image to adjust modified image,
* waits until it is displayed and switch the two rendering buffers, preparing
* next frame.
*****************************************************************************/
static subpicture_t *Filter( filter_t *p_filter, vlc_tick_t date )
{
filter_sys_t *p_sys = p_filter->p_sys;
/* We might need to open these at any time. */
vlc_mutex_lock( &p_sys->lock );
if( p_sys->i_inputfd == -1 )
{
p_sys->i_inputfd = vlc_open( p_sys->psz_inputfile, O_RDONLY | O_NONBLOCK );
if( p_sys->i_inputfd == -1 )
{
msg_Warn( p_filter, "Failed to grab input file: %s (%s)",
p_sys->psz_inputfile, vlc_strerror_c(errno) );
}
else
{
msg_Info( p_filter, "Grabbed input file: %s",
p_sys->psz_inputfile );
}
}
if( p_sys->i_outputfd == -1 )
{
p_sys->i_outputfd = vlc_open( p_sys->psz_outputfile,
O_WRONLY | O_NONBLOCK );
if( p_sys->i_outputfd == -1 )
{
if( errno != ENXIO )
{
msg_Warn( p_filter, "Failed to grab output file: %s (%s)",
p_sys->psz_outputfile, vlc_strerror_c(errno) );
}
}
else
{
msg_Info( p_filter, "Grabbed output file: %s",
p_sys->psz_outputfile );
}
}
vlc_mutex_unlock( &p_sys->lock );
/* Read any waiting commands */
if( p_sys->i_inputfd != -1 )
{
char p_buffer[1024];
ssize_t i_len = read( p_sys->i_inputfd, p_buffer, 1024 );
if( i_len == -1 )
{
/* We hit an error */
if( errno != EAGAIN )
{
msg_Warn( p_filter, "Error on input file: %s",
vlc_strerror_c(errno) );
vlc_close( p_sys->i_inputfd );
p_sys->i_inputfd = -1;
}
}
else if( i_len == 0 )
{
/* We hit the end-of-file */
}
else
{
BufferAdd( &p_sys->input, p_buffer, i_len );
}
}
/* Parse any complete commands */
char *p_end, *p_cmd;
while( ( p_end = memchr( p_sys->input.p_begin, '\n',
p_sys->input.i_length ) ) )
{
commanddesc_t *p_cur = NULL;
bool b_found = false;
size_t i_index = 0;
*p_end = '\0';
p_cmd = BufferGetToken( &p_sys->input );
msg_Info( p_filter, "Search command: %s", p_cmd );
for( i_index = 0; i_index < p_sys->i_commands; i_index++ )
{
p_cur = p_sys->pp_commands[i_index];
if( !strncmp( p_cur->psz_command, p_cmd, strlen(p_cur->psz_command) ) )
{
p_cmd[strlen(p_cur->psz_command)] = '\0';
b_found = true;
break;
}
}
if( !b_found )
{
/* No matching command */
msg_Err( p_filter, "Got invalid command: %s", p_cmd );
BufferPrintf( &p_sys->output, "FAILURE: %d Invalid Command\n", VLC_EGENERIC );
}
else
{
msg_Info( p_filter, "Got valid command: %s", p_cmd );
command_t *p_cmddesc = malloc( sizeof( command_t ) );
if( !p_cmddesc )
return NULL;
p_cmd = p_cmd + strlen(p_cur->psz_command) +1;
p_cmddesc->p_command = p_cur;
p_cmddesc->p_command->pf_parser( p_cmd, p_end,
&p_cmddesc->params );
if( p_cmddesc->p_command->b_atomic && p_sys->b_atomic )
QueueEnqueue( &p_sys->atomic, p_cmddesc );
else
QueueEnqueue( &p_sys->pending, p_cmddesc );
}
BufferDel( &p_sys->input, p_end - p_sys->input.p_begin + 1 );
}
/* Process any pending commands */
command_t *p_command = NULL;
while( (p_command = QueueDequeue( &p_sys->pending )) )
{
p_command->i_status =
p_command->p_command->pf_execute( p_filter, &p_command->params,
&p_command->results );
QueueEnqueue( &p_sys->processed, p_command );
}
/* Output any processed commands */
while( (p_command = QueueDequeue( &p_sys->processed )) )
{
if( p_command->i_status == VLC_SUCCESS )
{
const char *psz_success = "SUCCESS:";
const char *psz_nl = "\n";
BufferAdd( &p_sys->output, psz_success, 8 );
p_command->p_command->pf_unparse( &p_command->results,
&p_sys->output );
BufferAdd( &p_sys->output, psz_nl, 1 );
}
else
{
BufferPrintf( &p_sys->output, "FAILURE: %d\n",
p_command->i_status );
}
}
/* Try emptying the output buffer */
if( p_sys->i_outputfd != -1 )
{
ssize_t i_len = vlc_write( p_sys->i_outputfd, p_sys->output.p_begin,
p_sys->output.i_length );
if( i_len == -1 )
{
/* We hit an error */
if( errno != EAGAIN )
{
msg_Warn( p_filter, "Error on output file: %s",
vlc_strerror_c(errno) );
vlc_close( p_sys->i_outputfd );
p_sys->i_outputfd = -1;
}
}
else
{
BufferDel( &p_sys->output, i_len );
}
}
if( !p_sys->b_updated )
return NULL;
subpicture_t *p_spu = NULL;
overlay_t *p_overlay = NULL;
p_spu = filter_NewSubpicture( p_filter );
if( !p_spu )
return NULL;
p_spu->b_absolute = true;
p_spu->i_start = date;
p_spu->i_stop = 0;
p_spu->b_ephemer = true;
subpicture_region_t **pp_region = &p_spu->p_region;
while( (p_overlay = ListWalk( &p_sys->overlays )) )
{
subpicture_region_t *p_region;
*pp_region = p_region = subpicture_region_New( &p_overlay->format );
if( !p_region )
break;
msg_Dbg( p_filter, "Displaying overlay: %4.4s, %d, %d, %d",
(char*)&p_overlay->format.i_chroma, p_overlay->i_x, p_overlay->i_y,
p_overlay->i_alpha );
if( p_overlay->format.i_chroma == VLC_CODEC_TEXT )
{
p_region->p_text = text_segment_New( p_overlay->data.p_text );
p_region->p_text->style = text_style_Duplicate( p_overlay->p_fontstyle );
}
else
{
/* FIXME the copy is probably not needed anymore */
picture_Copy( p_region->p_picture, p_overlay->data.p_pic );
}
p_region->i_x = p_overlay->i_x;
p_region->i_y = p_overlay->i_y;
p_region->i_align = SUBPICTURE_ALIGN_LEFT | SUBPICTURE_ALIGN_TOP;
p_region->i_alpha = p_overlay->i_alpha;
pp_region = &p_region->p_next;
}
p_sys->b_updated = false;
return p_spu;
}
