/*****************************************************************************
* ProcessHeaders: process Theora headers.
*****************************************************************************/
static int ProcessHeaders( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
ogg_packet oggpacket;
th_setup_info *ts = NULL; /* theora setup information */
int i_max_pp, i_pp;
unsigned pi_size[XIPH_MAX_HEADER_COUNT];
void *pp_data[XIPH_MAX_HEADER_COUNT];
unsigned i_count;
if( xiph_SplitHeaders( pi_size, pp_data, &i_count,
p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra) )
return VLC_EGENERIC;
if( i_count < 3 )
goto error;
oggpacket.granulepos = -1;
oggpacket.e_o_s = 0;
oggpacket.packetno = 0;
/* Take care of the initial Vorbis header */
oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */
oggpacket.bytes = pi_size[0];
oggpacket.packet = pp_data[0];
if( th_decode_headerin( &p_sys->ti, &p_sys->tc, &ts, &oggpacket ) < 0 )
{
msg_Err( p_dec, "this bitstream does not contain Theora video data" );
goto error;
}
/* Set output properties */
if( !p_sys->b_packetizer )
switch( p_sys->ti.pixel_fmt )
{
case TH_PF_420:
p_dec->fmt_out.i_codec = VLC_CODEC_I420;
break;
case TH_PF_422:
p_dec->fmt_out.i_codec = VLC_CODEC_I422;
break;
case TH_PF_444:
p_dec->fmt_out.i_codec = VLC_CODEC_I444;
break;
case TH_PF_RSVD:
default:
msg_Err( p_dec, "unknown chroma in theora sample" );
break;
}
p_dec->fmt_out.video.i_width = p_sys->ti.frame_width;
p_dec->fmt_out.video.i_height = p_sys->ti.frame_height;
if( p_sys->ti.pic_width && p_sys->ti.pic_height )
{
p_dec->fmt_out.video.i_visible_width = p_sys->ti.pic_width;
p_dec->fmt_out.video.i_visible_height = p_sys->ti.pic_height;
if( p_sys->ti.pic_x || p_sys->ti.pic_y )
{
p_dec->fmt_out.video.i_x_offset = p_sys->ti.pic_x;
p_dec->fmt_out.video.i_y_offset = p_sys->ti.pic_y;
}
}
if( p_sys->ti.aspect_denominator && p_sys->ti.aspect_numerator )
{
p_dec->fmt_out.video.i_sar_num = p_sys->ti.aspect_numerator;
p_dec->fmt_out.video.i_sar_den = p_sys->ti.aspect_denominator;
}
else
{
p_dec->fmt_out.video.i_sar_num = 1;
p_dec->fmt_out.video.i_sar_den = 1;
}
if( p_sys->ti.fps_numerator > 0 && p_sys->ti.fps_denominator > 0 )
{
p_dec->fmt_out.video.i_frame_rate = p_sys->ti.fps_numerator;
p_dec->fmt_out.video.i_frame_rate_base = p_sys->ti.fps_denominator;
}
msg_Dbg( p_dec, "%dx%d %.02f fps video, frame content "
"is %dx%d with offset (%d,%d)",
p_sys->ti.frame_width, p_sys->ti.frame_height,
(double)p_sys->ti.fps_numerator/p_sys->ti.fps_denominator,
p_sys->ti.pic_width, p_sys->ti.pic_height,
p_sys->ti.pic_x, p_sys->ti.pic_y );
/* Some assertions based on the documentation. These are mandatory restrictions. */
assert( p_sys->ti.frame_height % 16 == 0 && p_sys->ti.frame_height < 1048576 );
assert( p_sys->ti.frame_width % 16 == 0 && p_sys->ti.frame_width < 1048576 );
assert( p_sys->ti.keyframe_granule_shift >= 0 && p_sys->ti.keyframe_granule_shift <= 31 );
assert( p_sys->ti.pic_x <= __MIN( p_sys->ti.frame_width - p_sys->ti.pic_width, 255 ) );
assert( p_sys->ti.pic_y <= p_sys->ti.frame_height - p_sys->ti.pic_height);
assert( p_sys->ti.frame_height - p_sys->ti.pic_height - p_sys->ti.pic_y <= 255 );
/* Sanity check that seems necessary for some corrupted files */
if( p_sys->ti.frame_width < p_sys->ti.pic_width ||
p_sys->ti.frame_height < p_sys->ti.pic_height )
{
msg_Warn( p_dec, "trying to correct invalid theora header "
"(frame size (%dx%d) is smaller than frame content (%d,%d))",
p_sys->ti.frame_width, p_sys->ti.frame_height,
p_sys->ti.pic_width, p_sys->ti.pic_height );
if( p_sys->ti.frame_width < p_sys->ti.pic_width )
p_sys->ti.frame_width = p_sys->ti.pic_width;
if( p_sys->ti.frame_height < p_sys->ti.pic_height )
p_sys->ti.frame_height = p_sys->ti.pic_height;
}
/* The next packet in order is the comments header */
oggpacket.b_o_s = 0;
oggpacket.bytes = pi_size[1];
oggpacket.packet = pp_data[1];
if( th_decode_headerin( &p_sys->ti, &p_sys->tc, &ts, &oggpacket ) < 0 )
{
msg_Err( p_dec, "2nd Theora header is corrupted" );
goto error;
}
ParseTheoraComments( p_dec );
/* The next packet in order is the codebooks header
* We need to watch out that this packet is not missing as a
* missing or corrupted header is fatal. */
oggpacket.b_o_s = 0;
oggpacket.bytes = pi_size[2];
oggpacket.packet = pp_data[2];
if( th_decode_headerin( &p_sys->ti, &p_sys->tc, &ts, &oggpacket ) < 0 )
{
msg_Err( p_dec, "3rd Theora header is corrupted" );
goto error;
}
if( !p_sys->b_packetizer )
{
/* We have all the headers, initialize decoder */
if ( ( p_sys->tcx = th_decode_alloc( &p_sys->ti, ts ) ) == NULL )
{
msg_Err( p_dec, "Could not allocate Theora decoder" );
goto error;
}
i_pp = var_InheritInteger( p_dec, DEC_CFG_PREFIX "postproc" );
if ( i_pp >= 0 && !th_decode_ctl( p_sys->tcx,
TH_DECCTL_GET_PPLEVEL_MAX, &i_max_pp, sizeof(int) ) )
{
i_pp = __MIN( i_pp, i_max_pp );
if ( th_decode_ctl( p_sys->tcx, TH_DECCTL_SET_PPLEVEL,
&i_pp, sizeof(int) ) )
msg_Err( p_dec, "Failed to set post processing level to %d",
i_pp );
else
msg_Dbg( p_dec, "Set post processing level to %d / %d",
i_pp, i_max_pp );
}
}
else
{
p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
p_dec->fmt_out.p_extra = xrealloc( p_dec->fmt_out.p_extra,
p_dec->fmt_out.i_extra );
memcpy( p_dec->fmt_out.p_extra,
p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
}
for( unsigned i = 0; i < i_count; i++ )
free( pp_data[i] );
/* Clean up the decoder setup info... we're done with it */
th_setup_free( ts );
return VLC_SUCCESS;
error:
for( unsigned i = 0; i < i_count; i++ )
free( pp_data[i] );
/* Clean up the decoder setup info... we're done with it */
th_setup_free( ts );
return VLC_EGENERIC;
}
/*****************************************************************************
* ProcessHeaders: process Theora headers.
*****************************************************************************/
static int ProcessHeaders( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
ogg_packet oggpacket;
unsigned pi_size[XIPH_MAX_HEADER_COUNT];
void *pp_data[XIPH_MAX_HEADER_COUNT];
unsigned i_count;
if( xiph_SplitHeaders( pi_size, pp_data, &i_count,
p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra) )
return VLC_EGENERIC;
if( i_count < 3 )
goto error;
oggpacket.granulepos = -1;
oggpacket.e_o_s = 0;
oggpacket.packetno = 0;
/* Take care of the initial Vorbis header */
oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */
oggpacket.bytes = pi_size[0];
oggpacket.packet = pp_data[0];
if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
{
msg_Err( p_dec, "this bitstream does not contain Theora video data" );
goto error;
}
/* Set output properties */
if( !p_sys->b_packetizer )
switch( p_sys->ti.pixelformat )
{
case OC_PF_420:
p_dec->fmt_out.i_codec = VLC_CODEC_I420;
break;
case OC_PF_422:
p_dec->fmt_out.i_codec = VLC_CODEC_I422;
break;
case OC_PF_444:
p_dec->fmt_out.i_codec = VLC_CODEC_I444;
break;
case OC_PF_RSVD:
default:
msg_Err( p_dec, "unknown chroma in theora sample" );
break;
}
p_dec->fmt_out.video.i_width = p_sys->ti.width;
p_dec->fmt_out.video.i_height = p_sys->ti.height;
if( p_sys->ti.frame_width && p_sys->ti.frame_height )
{
p_dec->fmt_out.video.i_visible_width = p_sys->ti.frame_width;
p_dec->fmt_out.video.i_visible_height = p_sys->ti.frame_height;
if( p_sys->ti.offset_x || p_sys->ti.offset_y )
{
p_dec->fmt_out.video.i_x_offset = p_sys->ti.offset_x;
p_dec->fmt_out.video.i_y_offset = p_sys->ti.offset_y;
}
}
if( p_sys->ti.aspect_denominator && p_sys->ti.aspect_numerator )
{
p_dec->fmt_out.video.i_sar_num = p_sys->ti.aspect_numerator;
p_dec->fmt_out.video.i_sar_den = p_sys->ti.aspect_denominator;
}
else
{
p_dec->fmt_out.video.i_sar_num = 1;
p_dec->fmt_out.video.i_sar_den = 1;
}
if( p_sys->ti.fps_numerator > 0 && p_sys->ti.fps_denominator > 0 )
{
p_dec->fmt_out.video.i_frame_rate = p_sys->ti.fps_numerator;
p_dec->fmt_out.video.i_frame_rate_base = p_sys->ti.fps_denominator;
}
msg_Dbg( p_dec, "%dx%d %.02f fps video, frame content "
"is %dx%d with offset (%d,%d)",
p_sys->ti.width, p_sys->ti.height,
(double)p_sys->ti.fps_numerator/p_sys->ti.fps_denominator,
p_sys->ti.frame_width, p_sys->ti.frame_height,
p_sys->ti.offset_x, p_sys->ti.offset_y );
/* Sanity check that seems necessary for some corrupted files */
if( p_sys->ti.width < p_sys->ti.frame_width ||
p_sys->ti.height < p_sys->ti.frame_height )
{
msg_Warn( p_dec, "trying to correct invalid theora header "
"(frame size (%dx%d) is smaller than frame content (%d,%d))",
p_sys->ti.width, p_sys->ti.height,
p_sys->ti.frame_width, p_sys->ti.frame_height );
if( p_sys->ti.width < p_sys->ti.frame_width )
p_sys->ti.width = p_sys->ti.frame_width;
if( p_sys->ti.height < p_sys->ti.frame_height )
p_sys->ti.height = p_sys->ti.frame_height;
}
/* The next packet in order is the comments header */
oggpacket.b_o_s = 0;
oggpacket.bytes = pi_size[1];
oggpacket.packet = pp_data[1];
if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
{
msg_Err( p_dec, "2nd Theora header is corrupted" );
goto error;
}
ParseTheoraComments( p_dec );
/* The next packet in order is the codebooks header
* We need to watch out that this packet is not missing as a
* missing or corrupted header is fatal. */
oggpacket.b_o_s = 0;
oggpacket.bytes = pi_size[2];
oggpacket.packet = pp_data[2];
if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
{
msg_Err( p_dec, "3rd Theora header is corrupted" );
goto error;
}
if( !p_sys->b_packetizer )
{
/* We have all the headers, initialize decoder */
theora_decode_init( &p_sys->td, &p_sys->ti );
}
else
{
p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
p_dec->fmt_out.p_extra = xrealloc( p_dec->fmt_out.p_extra,
p_dec->fmt_out.i_extra );
memcpy( p_dec->fmt_out.p_extra,
p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
}
for( unsigned i = 0; i < i_count; i++ )
free( pp_data[i] );
return VLC_SUCCESS;
error:
for( unsigned i = 0; i < i_count; i++ )
free( pp_data[i] );
return VLC_EGENERIC;
}
