static int _parse_app_info(BITSTREAM *bs, INDX_APP_INFO *app_info)
{
uint32_t len;
if (bs_seek_byte(bs, 40) < 0) {
return 0;
}
len = bs_read(bs, 32);
if (len != 34) {
BD_DEBUG(DBG_NAV, "index.bdmv app_info length is %d, expected 34 !\n", len);
}
bs_skip(bs, 1);
app_info->initial_output_mode_preference = bs_read(bs, 1);
app_info->content_exist_flag = bs_read(bs, 1);
bs_skip(bs, 5);
app_info->video_format = bs_read(bs, 4);
app_info->frame_rate = bs_read(bs, 4);
bs_read_bytes(bs, app_info->user_data, 32);
return 1;
}
static int32_t getFPS( demux_t *p_demux, block_t * p_block )
{
demux_sys_t *p_sys = p_demux->p_sys;
bs_t bs;
uint8_t * p_decoded_nal;
int i_decoded_nal;
if( p_block->i_buffer < 5 )
return -1;
p_decoded_nal = CreateDecodedNAL(&i_decoded_nal,
p_block->p_buffer+4, p_block->i_buffer-4);
if( !p_decoded_nal )
return -1;
bs_init( &bs, p_decoded_nal, i_decoded_nal );
bs_skip( &bs, 12 );
int32_t max_sub_layer_minus1 = bs_read( &bs, 3 );
bs_skip( &bs, 17 );
hevc_skip_profile_tiers_level( &bs, max_sub_layer_minus1 );
int32_t vps_sub_layer_ordering_info_present_flag = bs_read1( &bs );
int32_t i = vps_sub_layer_ordering_info_present_flag? 0 : max_sub_layer_minus1;
for( ; i <= max_sub_layer_minus1; i++ )
{
bs_read_ue( &bs );
bs_read_ue( &bs );
bs_read_ue( &bs );
}
uint32_t vps_max_layer_id = bs_read( &bs, 6);
uint32_t vps_num_layer_sets_minus1 = bs_read_ue( &bs );
bs_skip( &bs, vps_max_layer_id * vps_num_layer_sets_minus1 );
if( bs_read1( &bs ))
{
uint32_t num_units_in_tick = bs_read( &bs, 32 );
uint32_t time_scale = bs_read( &bs, 32 );
if( num_units_in_tick )
{
p_sys->f_fps = ( (float) time_scale )/( (float) num_units_in_tick );
msg_Dbg(p_demux,"Using framerate %f fps from VPS",
(double) p_sys->f_fps);
}
else
{
msg_Err( p_demux, "vps_num_units_in_tick null defaulting to 25 fps");
p_sys->f_fps = 25.0f;
}
}
else
{
msg_Err( p_demux, "No timing info in VPS defaulting to 25 fps");
p_sys->f_fps = 25.0f;
}
free(p_decoded_nal);
return 0;
}
/* Parse WMV3 packet and extract frame type information */
static void ParseWMV3( decoder_t *p_dec, block_t *p_block )
{
bs_t s;
/* Parse Sequence header */
bs_init( &s, p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
if( bs_read( &s, 2 ) == 3 )
return;
bs_skip( &s, 22 );
const bool b_range_reduction = bs_read( &s, 1 );
const bool b_has_frames = bs_read( &s, 3 ) > 0;
bs_skip( &s, 2 );
const bool b_frame_interpolation = bs_read( &s, 1 );
if( bs_eof( &s ) )
return;
/* Parse frame type */
bs_init( &s, p_block->p_buffer, p_block->i_buffer );
bs_skip( &s, b_frame_interpolation +
2 +
b_range_reduction );
p_block->i_flags &= ~BLOCK_FLAG_TYPE_MASK;
if( bs_read( &s, 1 ) )
p_block->i_flags |= BLOCK_FLAG_TYPE_P;
else if( !b_has_frames || bs_read( &s, 1 ) )
p_block->i_flags |= BLOCK_FLAG_TYPE_I;
else
p_block->i_flags |= BLOCK_FLAG_TYPE_B;
}
void bd_mpls_mark_Parse( bd_mpls_mark_t *p_mark, bs_t *s )
{
bs_skip( s, 8 );
p_mark->i_type = bs_read( s, 8 );
p_mark->i_play_item_id = bs_read( s, 16 );
p_mark->i_time = bs_read( s, 32 );
p_mark->i_entry_es_pid = bs_read( s, 16 );
bs_skip( s, 32 );
}
int bd_clpi_ep_map_Parse( bd_clpi_ep_map_t *p_ep_map,
bs_t *s, const int i_ep_map_start )
{
p_ep_map->i_pid = bs_read( s, 16 );
bs_skip( s, 10 );
p_ep_map->i_type = bs_read( s, 4 );
const int i_coarse = bs_read( s, 16 );
const int i_fine = bs_read( s, 18 );
const uint32_t i_coarse_start = bs_read( s, 32 );
p_ep_map->i_ep = i_fine;
p_ep_map->p_ep = (bd_clpi_ep_t *)calloc( i_fine, sizeof(*p_ep_map->p_ep) ); // sunqueen modify
if( !p_ep_map->p_ep )
return VLC_EGENERIC;
bs_t cs = *s;
bs_skip( &cs, 8*(i_ep_map_start + i_coarse_start) - bs_pos( s ) );
const uint32_t i_fine_start = bs_read( &cs, 32 );
for( int i = 0; i < i_coarse; i++ )
{
const int i_fine_id = bs_read( &cs, 18 );
const int i_pts = bs_read( &cs, 14 );
const uint32_t i_packet = bs_read( &cs, 32 );
for( int j = i_fine_id; j < p_ep_map->i_ep; j++ )
{
p_ep_map->p_ep[j].i_pts = (int64_t)(i_pts & ~1) << 19;
p_ep_map->p_ep[j].i_packet = i_packet & ~( (1 << 17) - 1 );
}
}
bs_t fs = *s;
bs_skip( &fs, 8*(i_ep_map_start + i_coarse_start + i_fine_start) - bs_pos( s ) );
for( int i = 0; i < i_fine; i++ )
{
const bool b_angle_point = bs_read( &fs, 1 );
bs_skip( &fs, 3 ); /* I end position offset */
const int i_pts = bs_read( &fs, 11 );
const int i_packet = bs_read( &fs, 17 );
p_ep_map->p_ep[i].b_angle_point = b_angle_point;
p_ep_map->p_ep[i].i_pts |= i_pts << 9;
p_ep_map->p_ep[i].i_packet |= i_packet;
}
return VLC_SUCCESS;
}
static int _parse_hdmv_obj(BITSTREAM *bs, INDX_HDMV_OBJ *hdmv)
{
hdmv->playback_type = bs_read(bs, 2);
bs_skip(bs, 14);
hdmv->id_ref = bs_read(bs, 16);
bs_skip(bs, 32);
if (hdmv->playback_type != indx_hdmv_playback_type_movie &&
hdmv->playback_type != indx_hdmv_playback_type_interactive) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "index.bdmv: invalid HDMV playback type %d\n", hdmv->playback_type);
}
return 1;
}
static int _parse_bdj_obj(BITSTREAM *bs, INDX_BDJ_OBJ *bdj)
{
bdj->playback_type = bs_read(bs, 2);
bs_skip(bs, 14);
bs_read_string(bs, bdj->name, 5);
bs_skip(bs, 8);
if (bdj->playback_type != indx_bdj_playback_type_movie &&
bdj->playback_type != indx_bdj_playback_type_interactive) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "index.bdmv: invalid BD-J playback type %d\n", bdj->playback_type);
}
return 1;
}
static void PutPPS( decoder_t *p_dec, block_t *p_frag )
{
decoder_sys_t *p_sys = p_dec->p_sys;
bs_t s;
int i_pps_id;
int i_sps_id;
bs_init( &s, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
i_pps_id = bs_read_ue( &s ); // pps id
i_sps_id = bs_read_ue( &s ); // sps id
if( i_pps_id >= PPS_MAX || i_sps_id >= SPS_MAX )
{
msg_Warn( p_dec, "invalid PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
block_Release( p_frag );
return;
}
bs_skip( &s, 1 ); // entropy coding mode flag
p_sys->i_pic_order_present_flag = bs_read( &s, 1 );
/* TODO */
/* We have a new PPS */
if( !p_sys->b_pps )
msg_Dbg( p_dec, "found NAL_PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
p_sys->b_pps = true;
if( p_sys->pp_pps[i_pps_id] )
block_Release( p_sys->pp_pps[i_pps_id] );
p_sys->pp_pps[i_pps_id] = p_frag;
}
static int _mobj_parse_object(BITSTREAM *bs, MOBJ_OBJECT *obj)
{
int i;
obj->resume_intention_flag = bs_read(bs, 1);
obj->menu_call_mask = bs_read(bs, 1);
obj->title_search_mask = bs_read(bs, 1);
bs_skip(bs, 13); /* padding */
obj->num_cmds = bs_read(bs, 16);
obj->cmds = calloc(obj->num_cmds, sizeof(MOBJ_CMD));
if (!obj->cmds) {
BD_DEBUG(DBG_CRIT, "out of memory\n");
return 0;
}
for (i = 0; i < obj->num_cmds; i++) {
uint8_t buf[12];
bs_read_bytes(bs, buf, 12);
mobj_parse_cmd(buf, &obj->cmds[i]);
}
return 1;
}
static int _parse_index(BITSTREAM *bs, INDX_ROOT *index)
{
uint32_t index_len, i;
index_len = bs_read(bs, 32);
/* TODO: check if goes to extension data area */
if ((bs_end(bs) - bs_pos(bs))/8 < (int64_t)index_len) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "index.bdmv: invalid index_len %d !\n", index_len);
return 0;
}
if (!_parse_playback_obj(bs, &index->first_play) ||
!_parse_playback_obj(bs, &index->top_menu)) {
return 0;
}
index->num_titles = bs_read(bs, 16);
if (!index->num_titles) {
BD_DEBUG(DBG_CRIT, "empty index\n");
return 0;
}
index->titles = calloc(index->num_titles, sizeof(INDX_TITLE));
if (!index->titles) {
BD_DEBUG(DBG_CRIT, "out of memory\n");
return 0;
}
if (bs_avail(bs)/(12*8) < index->num_titles) {
BD_DEBUG(DBG_HDMV|DBG_CRIT, "index.bdmv: unexpected EOF\n");
return 0;
}
for (i = 0; i < index->num_titles; i++) {
index->titles[i].object_type = bs_read(bs, 2);
index->titles[i].access_type = bs_read(bs, 2);
bs_skip(bs, 28);
switch (index->titles[i].object_type) {
case indx_object_type_hdmv:
if (!_parse_hdmv_obj(bs, &index->titles[i].hdmv))
return 0;
break;
case indx_object_type_bdj:
if (!_parse_bdj_obj(bs, &index->titles[i].bdj))
return 0;
break;
default:
BD_DEBUG(DBG_NAV | DBG_CRIT, "index.bdmv: unknown object type %d (#%d)\n", index->titles[i].object_type, i);
return 0;
}
}
return 1;
}
/*****************************************************************************
* parse_data_group
*****************************************************************************
* ARIB STD-B24 VOLUME 1 Part 3 Chapter 9.2 Structure of data group
*****************************************************************************/
static void parse_data_group( arib_parser_t *p_parser, bs_t *p_bs )
{
uint8_t i_data_group_id = bs_read( p_bs, 6 );
bs_skip( p_bs, 2 ); /* i_data_group_version */
bs_skip( p_bs, 8 ); /* i_data_group_link_number */
bs_skip( p_bs, 8 ); /* i_last_data_group_link_number */
bs_skip( p_bs, 16 ); /* i_data_group_size */
if( i_data_group_id == 0x00 || i_data_group_id == 0x20 )
{
parse_caption_management_data( p_parser, p_bs );
}
else
{
parse_caption_statement_data( p_parser, p_bs );
}
}
static block_t *PacketizeParse(void *p_private, bool *pb_ts_used, block_t *p_block)
{
decoder_t *p_dec = p_private;
decoder_sys_t *p_sys = p_dec->p_sys;
block_t * p_nal = NULL;
while (p_block->i_buffer > 5 && p_block->p_buffer[p_block->i_buffer-1] == 0x00 )
p_block->i_buffer--;
bs_t bs;
bs_init(&bs, p_block->p_buffer+3, p_block->i_buffer-3);
/* Get NALU type */
uint32_t forbidden_zero_bit = bs_read1(&bs);
if (forbidden_zero_bit)
{
msg_Err(p_dec,"Forbidden zero bit not null, corrupted NAL");
p_sys->p_frame = NULL;
p_sys->b_vcl = false;
return NULL;
}
uint32_t nalu_type = bs_read(&bs,6);
bs_skip(&bs, 9);
if (nalu_type < VPS)
{
/* NAL is a VCL NAL */
p_sys->b_vcl = true;
uint32_t first_slice_in_pic = bs_read1(&bs);
if (first_slice_in_pic && p_sys->p_frame)
{
p_nal = block_ChainGather(p_sys->p_frame);
p_sys->p_frame = NULL;
}
block_ChainAppend(&p_sys->p_frame, p_block);
}
else
{
if (p_sys->b_vcl)
{
p_nal = block_ChainGather(p_sys->p_frame);
p_nal->p_next = p_block;
p_sys->p_frame = NULL;
p_sys->b_vcl =false;
}
else
p_nal = p_block;
}
*pb_ts_used = false;
return p_nal;
}
static MOBJ_OBJECTS *_mobj_parse(BD_FILE_H *fp)
{
BITSTREAM bs;
MOBJ_OBJECTS *objects = NULL;
uint16_t num_objects;
uint32_t data_len;
int extension_data_start, i;
bs_init(&bs, fp);
if (!_mobj_parse_header(&bs, &extension_data_start)) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "MovieObject.bdmv: invalid header\n");
goto error;
}
if (extension_data_start) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "MovieObject.bdmv: unknown extension data at %d\n", extension_data_start);
}
bs_seek_byte(&bs, 40);
data_len = bs_read(&bs, 32);
if ((bs_end(&bs) - bs_pos(&bs))/8 < (int64_t)data_len) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "MovieObject.bdmv: invalid data_len %d !\n", data_len);
goto error;
}
objects = calloc(1, sizeof(MOBJ_OBJECTS));
if (!objects) {
BD_DEBUG(DBG_CRIT, "out of memory\n");
goto error;
}
bs_skip(&bs, 32); /* reserved */
num_objects = bs_read(&bs, 16);
objects->num_objects = num_objects;
objects->objects = calloc(num_objects, sizeof(MOBJ_OBJECT));
if (!objects->objects) {
BD_DEBUG(DBG_CRIT, "out of memory\n");
goto error;
}
for (i = 0; i < objects->num_objects; i++) {
if (!_mobj_parse_object(&bs, &objects->objects[i])) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "MovieObject.bdmv: error parsing object %d\n", i);
goto error;
}
}
return objects;
error:
mobj_free(&objects);
return NULL;
}
static void parse_data_unit_others( arib_parser_t *p_parser, bs_t *p_bs,
uint8_t i_data_unit_parameter,
uint32_t i_data_unit_size )
{
for( uint32_t i = 0; i < i_data_unit_size; i++ )
{
bs_skip( p_bs, 8 );
p_parser->i_data_unit_size += 1;
}
}
static MOBJ_OBJECTS *_mobj_parse(const char *file_name)
{
BITSTREAM bs;
BD_FILE_H *fp;
MOBJ_OBJECTS *objects = NULL;
uint16_t num_objects;
uint32_t data_len;
int extension_data_start, i;
fp = file_open(file_name, "rb");
if (!fp) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "error opening %s\n", file_name);
return NULL;
}
bs_init(&bs, fp);
if (!_mobj_parse_header(&bs, &extension_data_start)) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "%s: invalid header\n", file_name);
goto error;
}
bs_seek_byte(&bs, 40);
data_len = bs_read(&bs, 32);
if ((bs_end(&bs) - bs_pos(&bs))/8 < (off_t)data_len) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "%s: invalid data_len %d !\n", file_name, data_len);
goto error;
}
bs_skip(&bs, 32); /* reserved */
num_objects = bs_read(&bs, 16);
objects = calloc(1, sizeof(MOBJ_OBJECTS));
objects->num_objects = num_objects;
objects->objects = calloc(num_objects, sizeof(MOBJ_OBJECT));
for (i = 0; i < objects->num_objects; i++) {
if (!_mobj_parse_object(&bs, &objects->objects[i])) {
BD_DEBUG(DBG_NAV | DBG_CRIT, "%s: error parsing object %d\n", file_name, i);
goto error;
}
}
file_close(fp);
return objects;
error:
mobj_free(&objects);
file_close(fp);
return NULL;
}
void bd_clpi_stream_Parse( bd_clpi_stream_t *p_stream, bs_t *s )
{
p_stream->i_pid = bs_read( s, 16 );
const int i_length = bs_read( s, 8 );
p_stream->i_type = bs_read( s, 8 );
/* Ignore the rest */
if( i_length > 1 )
bs_skip( s, 8*i_length - 8 );
}
/*****************************************************************************
* arib_parse_pes
*****************************************************************************
* ARIB STD-B24 VOLUME3 Chapter 5 Independent PES transmission protocol
*****************************************************************************/
void arib_parse_pes( arib_parser_t *p_parser, const void *p_data, size_t i_data )
{
bs_t bs;
bs_init( &bs, p_data, i_data );
uint8_t i_data_group_id = bs_read( &bs, 8 );
if( i_data_group_id != 0x80 && i_data_group_id != 0x81 )
{
return;
}
uint8_t i_private_stream_id = bs_read( &bs, 8 );
if( i_private_stream_id != 0xFF )
{
return;
}
bs_skip( &bs, 4 ); /* reserved */
uint8_t i_PES_data_packet_header_length= bs_read( &bs, 4 );
/* skip PES_data_private_data_byte */
bs_skip( &bs, i_PES_data_packet_header_length );
parse_data_group( p_parser, &bs );
}
static bool h264_parse_picture_parameter_set_rbsp( bs_t *p_bs,
h264_picture_parameter_set_t *p_pps )
{
p_pps->i_id = bs_read_ue( p_bs ); // pps id
p_pps->i_sps_id = bs_read_ue( p_bs ); // sps id
if( p_pps->i_id >= H264_PPS_MAX || p_pps->i_sps_id >= H264_SPS_MAX )
return false;
bs_skip( p_bs, 1 ); // entropy coding mode flag
p_pps->i_pic_order_present_flag = bs_read( p_bs, 1 );
/* TODO */
return true;
}
void bd_mpls_sub_path_Parse( bd_mpls_sub_path_t *p_path, bs_t *s )
{
const uint32_t i_length = bs_read( s, 32 );
const int i_start = bs_pos( s ) / 8;
bs_skip( s, 8 );
p_path->i_type = bs_read( s, 8 );
bs_skip( s, 15 );
p_path->b_repeat = bs_read( s, 1 );
bs_skip( s, 8 );
p_path->i_item = bs_read( s, 8 );
for( int j = 0; j < p_path->i_item; j++ )
{
const int i_length = bs_read( s, 16 );
const int i_start = bs_pos( s ) / 8;
/* TODO */
bs_skip( s, 8 * ( i_start + i_length ) - bs_pos( s ) );
}
bs_skip( s, 8 * ( i_start + i_length ) - bs_pos( s ) );
}
/*****************************************************************************
* parse_caption_data
*****************************************************************************
* ARIB STD-B24 VOLUME 1 Part 3 Chapter 9.3.2 Caption statement data
*****************************************************************************/
static void parse_caption_statement_data( arib_parser_t *p_parser, bs_t *p_bs )
{
uint8_t i_TMD = bs_read( p_bs, 2 );
bs_skip( p_bs, 6 ); /* Reserved */
if( i_TMD == 0x01 /* 01 */ || i_TMD == 0x02 /* 10 */ )
{
bs_skip( p_bs, 32 ); /* STM << 4 */
bs_skip( p_bs, 4 ); /* STM & 15 */
bs_skip( p_bs, 4 ); /* Reserved */
}
uint32_t i_data_unit_loop_length = bs_read( p_bs, 24 );
free( p_parser->psz_subtitle_data );
p_parser->i_subtitle_data_size = 0;
p_parser->psz_subtitle_data = NULL;
if( i_data_unit_loop_length > 0 )
{
p_parser->psz_subtitle_data = (unsigned char*) calloc(
i_data_unit_loop_length + 1, sizeof(unsigned char) );
}
while( p_parser->i_data_unit_size < i_data_unit_loop_length )
{
parse_data_unit( p_parser, p_bs );
}
}
static int _parse_playback_obj(BITSTREAM *bs, INDX_PLAY_ITEM *obj)
{
obj->object_type = bs_read(bs, 2);
bs_skip(bs, 30);
switch (obj->object_type) {
case indx_object_type_hdmv:
return _parse_hdmv_obj(bs, &obj->hdmv);
case indx_object_type_bdj:
return _parse_bdj_obj(bs, &obj->bdj);
}
BD_DEBUG(DBG_NAV | DBG_CRIT, "index.bdmv: unknown object type %d\n", obj->object_type);
return 0;
}
int h264_parse_pps( const uint8_t *p_pps_buf, int i_pps_size,
struct nal_pps *p_pps )
{
bs_t s;
if (i_pps_size < 5 || (p_pps_buf[4] & 0x1f) != NAL_PPS)
return -1;
memset( p_pps, 0, sizeof(struct nal_pps) );
bs_init( &s, &p_pps_buf[5], i_pps_size - 5 );
p_pps->i_id = bs_read_ue( &s ); // pps id
p_pps->i_sps_id = bs_read_ue( &s ); // sps id
if( p_pps->i_id >= PPS_MAX || p_pps->i_sps_id >= SPS_MAX )
{
return -1;
}
bs_skip( &s, 1 ); // entropy coding mode flag
p_pps->i_pic_order_present_flag = bs_read( &s, 1 );
/* TODO */
return 0;
}
static bool h264_parse_sequence_parameter_set_rbsp( bs_t *p_bs,
h264_sequence_parameter_set_t *p_sps )
{
int i_tmp;
int i_profile_idc = bs_read( p_bs, 8 );
p_sps->i_profile = i_profile_idc;
p_sps->i_constraint_set_flags = bs_read( p_bs, 8 );
p_sps->i_level = bs_read( p_bs, 8 );
/* sps id */
uint32_t i_sps_id = bs_read_ue( p_bs );
if( i_sps_id > H264_SPS_ID_MAX )
return false;
p_sps->i_id = i_sps_id;
if( i_profile_idc == PROFILE_H264_HIGH ||
i_profile_idc == PROFILE_H264_HIGH_10 ||
i_profile_idc == PROFILE_H264_HIGH_422 ||
i_profile_idc == PROFILE_H264_HIGH_444 || /* Old one, no longer on spec */
i_profile_idc == PROFILE_H264_HIGH_444_PREDICTIVE ||
i_profile_idc == PROFILE_H264_CAVLC_INTRA ||
i_profile_idc == PROFILE_H264_SVC_BASELINE ||
i_profile_idc == PROFILE_H264_SVC_HIGH ||
i_profile_idc == PROFILE_H264_MVC_MULTIVIEW_HIGH ||
i_profile_idc == PROFILE_H264_MVC_STEREO_HIGH ||
i_profile_idc == PROFILE_H264_MVC_MULTIVIEW_DEPTH_HIGH ||
i_profile_idc == PROFILE_H264_MVC_ENHANCED_MULTIVIEW_DEPTH_HIGH ||
i_profile_idc == PROFILE_H264_MFC_HIGH )
{
/* chroma_format_idc */
p_sps->i_chroma_idc = bs_read_ue( p_bs );
if( p_sps->i_chroma_idc == 3 )
bs_skip( p_bs, 1 ); /* separate_colour_plane_flag */
/* bit_depth_luma_minus8 */
p_sps->i_bit_depth_luma = bs_read_ue( p_bs ) + 8;
/* bit_depth_chroma_minus8 */
p_sps->i_bit_depth_chroma = bs_read_ue( p_bs ) + 8;
/* qpprime_y_zero_transform_bypass_flag */
bs_skip( p_bs, 1 );
/* seq_scaling_matrix_present_flag */
i_tmp = bs_read( p_bs, 1 );
if( i_tmp )
{
for( int i = 0; i < ((3 != p_sps->i_chroma_idc) ? 8 : 12); i++ )
{
/* seq_scaling_list_present_flag[i] */
i_tmp = bs_read( p_bs, 1 );
if( !i_tmp )
continue;
const int i_size_of_scaling_list = (i < 6 ) ? 16 : 64;
/* scaling_list (...) */
int i_lastscale = 8;
int i_nextscale = 8;
for( int j = 0; j < i_size_of_scaling_list; j++ )
{
if( i_nextscale != 0 )
{
/* delta_scale */
i_tmp = bs_read_se( p_bs );
i_nextscale = ( i_lastscale + i_tmp + 256 ) % 256;
/* useDefaultScalingMatrixFlag = ... */
}
/* scalinglist[j] */
i_lastscale = ( i_nextscale == 0 ) ? i_lastscale : i_nextscale;
}
}
}
}
/* Skip i_log2_max_frame_num */
p_sps->i_log2_max_frame_num = bs_read_ue( p_bs );
if( p_sps->i_log2_max_frame_num > 12)
p_sps->i_log2_max_frame_num = 12;
/* Read poc_type */
p_sps->i_pic_order_cnt_type = bs_read_ue( p_bs );
if( p_sps->i_pic_order_cnt_type == 0 )
{
/* skip i_log2_max_poc_lsb */
p_sps->i_log2_max_pic_order_cnt_lsb = bs_read_ue( p_bs );
if( p_sps->i_log2_max_pic_order_cnt_lsb > 12 )
p_sps->i_log2_max_pic_order_cnt_lsb = 12;
}
else if( p_sps->i_pic_order_cnt_type == 1 )
{
int i_cycle;
/* skip b_delta_pic_order_always_zero */
p_sps->i_delta_pic_order_always_zero_flag = bs_read( p_bs, 1 );
/* skip i_offset_for_non_ref_pic */
bs_read_se( p_bs );
/* skip i_offset_for_top_to_bottom_field */
bs_read_se( p_bs );
/* read i_num_ref_frames_in_poc_cycle */
i_cycle = bs_read_ue( p_bs );
if( i_cycle > 256 ) i_cycle = 256;
while( i_cycle > 0 )
{
/* skip i_offset_for_ref_frame */
bs_read_se(p_bs );
i_cycle--;
}
}
/* i_num_ref_frames */
bs_read_ue( p_bs );
/* b_gaps_in_frame_num_value_allowed */
bs_skip( p_bs, 1 );
/* Read size */
p_sps->pic_width_in_mbs_minus1 = bs_read_ue( p_bs );
p_sps->pic_height_in_map_units_minus1 = bs_read_ue( p_bs );
/* b_frame_mbs_only */
p_sps->frame_mbs_only_flag = bs_read( p_bs, 1 );
if( !p_sps->frame_mbs_only_flag )
bs_skip( p_bs, 1 );
/* b_direct8x8_inference */
bs_skip( p_bs, 1 );
/* crop */
if( bs_read1( p_bs ) ) /* frame_cropping_flag */
{
p_sps->frame_crop.left_offset = bs_read_ue( p_bs );
p_sps->frame_crop.right_offset = bs_read_ue( p_bs );
p_sps->frame_crop.right_offset = bs_read_ue( p_bs );
p_sps->frame_crop.bottom_offset = bs_read_ue( p_bs );
}
/* vui */
i_tmp = bs_read( p_bs, 1 );
if( i_tmp )
{
p_sps->vui.b_valid = true;
/* read the aspect ratio part if any */
i_tmp = bs_read( p_bs, 1 );
if( i_tmp )
{
static const struct { int w, h; } sar[17] =
{
{ 0, 0 }, { 1, 1 }, { 12, 11 }, { 10, 11 },
{ 16, 11 }, { 40, 33 }, { 24, 11 }, { 20, 11 },
{ 32, 11 }, { 80, 33 }, { 18, 11 }, { 15, 11 },
{ 64, 33 }, { 160,99 }, { 4, 3 }, { 3, 2 },
{ 2, 1 },
};
int i_sar = bs_read( p_bs, 8 );
int w, h;
if( i_sar < 17 )
{
w = sar[i_sar].w;
h = sar[i_sar].h;
}
else if( i_sar == 255 )
{
w = bs_read( p_bs, 16 );
h = bs_read( p_bs, 16 );
}
else
{
w = 0;
h = 0;
}
if( w != 0 && h != 0 )
{
p_sps->vui.i_sar_num = w;
p_sps->vui.i_sar_den = h;
}
else
{
p_sps->vui.i_sar_num = 1;
p_sps->vui.i_sar_den = 1;
}
}
/* overscan */
i_tmp = bs_read( p_bs, 1 );
if ( i_tmp )
bs_read( p_bs, 1 );
/* video signal type */
i_tmp = bs_read( p_bs, 1 );
if( i_tmp )
{
bs_read( p_bs, 3 );
p_sps->vui.colour.b_full_range = bs_read( p_bs, 1 );
/* colour desc */
i_tmp = bs_read( p_bs, 1 );
if ( i_tmp )
{
p_sps->vui.colour.i_colour_primaries = bs_read( p_bs, 8 );
p_sps->vui.colour.i_transfer_characteristics = bs_read( p_bs, 8 );
p_sps->vui.colour.i_matrix_coefficients = bs_read( p_bs, 8 );
}
else
{
p_sps->vui.colour.i_colour_primaries = HXXX_PRIMARIES_UNSPECIFIED;
p_sps->vui.colour.i_transfer_characteristics = HXXX_TRANSFER_UNSPECIFIED;
p_sps->vui.colour.i_matrix_coefficients = HXXX_MATRIX_UNSPECIFIED;
}
}
/* chroma loc info */
i_tmp = bs_read( p_bs, 1 );
if( i_tmp )
{
bs_read_ue( p_bs );
bs_read_ue( p_bs );
}
/* timing info */
p_sps->vui.b_timing_info_present_flag = bs_read( p_bs, 1 );
if( p_sps->vui.b_timing_info_present_flag )
{
p_sps->vui.i_num_units_in_tick = bs_read( p_bs, 32 );
p_sps->vui.i_time_scale = bs_read( p_bs, 32 );
p_sps->vui.b_fixed_frame_rate = bs_read( p_bs, 1 );
}
/* Nal hrd & VC1 hrd parameters */
p_sps->vui.b_hrd_parameters_present_flag = false;
for ( int i=0; i<2; i++ )
{
i_tmp = bs_read( p_bs, 1 );
if( i_tmp )
{
p_sps->vui.b_hrd_parameters_present_flag = true;
uint32_t count = bs_read_ue( p_bs ) + 1;
if( count > 31 )
return false;
bs_read( p_bs, 4 );
bs_read( p_bs, 4 );
for( uint32_t i=0; i<count; i++ )
{
if( bs_remain( p_bs ) < 23 )
return false;
bs_read_ue( p_bs );
bs_read_ue( p_bs );
bs_read( p_bs, 1 );
}
bs_read( p_bs, 5 );
p_sps->vui.i_cpb_removal_delay_length_minus1 = bs_read( p_bs, 5 );
p_sps->vui.i_dpb_output_delay_length_minus1 = bs_read( p_bs, 5 );
bs_read( p_bs, 5 );
}
}
if( p_sps->vui.b_hrd_parameters_present_flag )
bs_read( p_bs, 1 );
/* pic struct info */
p_sps->vui.b_pic_struct_present_flag = bs_read( p_bs, 1 );
/* + unparsed remains */
}
return true;
}
/* read in useful bits from sequence header */
static bool dirac_UnpackSeqHdr( struct seq_hdr_t *p_sh, block_t *p_block )
{
bs_t bs;
bs_init( &bs, p_block->p_buffer, p_block->i_buffer );
bs_skip( &bs, 13*8 ); /* parse_info_header */
dirac_uint( &bs ); /* major_version */
dirac_uint( &bs ); /* minor_version */
dirac_uint( &bs ); /* profile */
dirac_uint( &bs ); /* level */
uint32_t u_video_format = dirac_uint( &bs ); /* index */
if( u_video_format > 20 )
{
/* don't know how to parse this header */
return false;
}
static const struct {
uint32_t u_w, u_h;
} dirac_size_tbl[] = {
{640,480}, {176,120}, {176,144}, {352,240}, {352,288}, {704,480},
{704,576}, {720,480}, {720,576}, {1280,720}, {1280,720}, {1920,1080},
{1920,1080}, {1920,1080}, {1920,1080}, {2048,1080}, {4096,2160},
{3840,2160}, {3840,2160}, {7680,4320}, {7680,4320},
};
p_sh->u_width = dirac_size_tbl[u_video_format].u_w;
p_sh->u_height = dirac_size_tbl[u_video_format].u_h;
if( dirac_bool( &bs ) )
{
p_sh->u_width = dirac_uint( &bs ); /* frame_width */
p_sh->u_height = dirac_uint( &bs ); /* frame_height */
}
if( dirac_bool( &bs ) )
{
dirac_uint( &bs ); /* chroma_format */
}
if( dirac_bool( &bs ) )
{
dirac_uint( &bs ); /* scan_format */
}
static const struct {
uint32_t u_n /* numerator */, u_d /* denominator */;
} dirac_frate_tbl[] = { /* table 10.3 */
{1, 1}, /* this value is not used */
{24000,1001}, {24,1}, {25,1}, {30000,1001}, {30,1},
{50,1}, {60000,1001}, {60,1}, {15000,1001}, {25,2},
};
const unsigned dirac_frate_tbl_size =
sizeof( dirac_frate_tbl ) / sizeof( *dirac_frate_tbl );
static const uint32_t dirac_vidfmt_frate[] = { /* table C.1 */
1, 9, 10, 9, 10, 9, 10, 4, 3, 7, 6, 4, 3, 7, 6, 2, 2, 7, 6, 7, 6,
};
p_sh->u_fps_num = dirac_frate_tbl[dirac_vidfmt_frate[u_video_format]].u_n;
p_sh->u_fps_den = dirac_frate_tbl[dirac_vidfmt_frate[u_video_format]].u_d;
if( dirac_bool( &bs ) )
{
uint32_t frame_rate_index = dirac_uint( &bs );
if( frame_rate_index >= dirac_frate_tbl_size )
{
/* invalid header */
return false;
}
p_sh->u_fps_num = dirac_frate_tbl[frame_rate_index].u_n;
p_sh->u_fps_den = dirac_frate_tbl[frame_rate_index].u_d;
if( frame_rate_index == 0 )
{
p_sh->u_fps_num = dirac_uint( &bs ); /* frame_rate_numerator */
p_sh->u_fps_den = dirac_uint( &bs ); /* frame_rate_denominator */
}
}
/* must have a valid framerate */
if( !p_sh->u_fps_num || !p_sh->u_fps_den )
return false;
if( dirac_bool( &bs ) )
{
uint32_t par_index = dirac_uint( &bs );
if( !par_index )
{
dirac_uint( &bs ); /* par_num */
dirac_uint( &bs ); /* par_den */
}
}
if( dirac_bool( &bs ) )
{
dirac_uint( &bs ); /* clean_width */
dirac_uint( &bs ); /* clean_height */
dirac_uint( &bs ); /* clean_left_offset */
dirac_uint( &bs ); /* clean_top_offset */
}
if( dirac_bool( &bs ) )
{
uint32_t signal_range_index = dirac_uint( &bs );
if( !signal_range_index )
{
dirac_uint( &bs ); /* luma_offset */
dirac_uint( &bs ); /* luma_excursion */
dirac_uint( &bs ); /* chroma_offset */
dirac_uint( &bs ); /* chroma_excursion */
}
}
if( dirac_bool( &bs ) )
{
uint32_t colour_spec_index = dirac_uint( &bs );
if( !colour_spec_index )
{
if( dirac_bool( &bs ) )
{
dirac_uint( &bs ); /* colour_primaries_index */
}
if( dirac_bool( &bs ) )
{
dirac_uint( &bs ); /* colour_matrix_index */
}
if( dirac_bool( &bs ) )
{
dirac_uint( &bs ); /* transfer_function_index */
}
}
}
p_sh->u_picture_coding_mode = dirac_uint( &bs );
return true;
}
static void PutSPS( decoder_t *p_dec, block_t *p_frag )
{
decoder_sys_t *p_sys = p_dec->p_sys;
uint8_t *pb_dec = NULL;
int i_dec = 0;
bs_t s;
int i_tmp;
int i_sps_id;
CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
p_frag->i_buffer - 5 );
bs_init( &s, pb_dec, i_dec );
int i_profile_idc = bs_read( &s, 8 );
p_dec->fmt_out.i_profile = i_profile_idc;
/* Skip constraint_set0123, reserved(4) */
bs_skip( &s, 1+1+1+1 + 4 );
p_dec->fmt_out.i_level = bs_read( &s, 8 );
/* sps id */
i_sps_id = bs_read_ue( &s );
if( i_sps_id >= SPS_MAX || i_sps_id < 0 )
{
msg_Warn( p_dec, "invalid SPS (sps_id=%d)", i_sps_id );
free( pb_dec );
block_Release( p_frag );
return;
}
if( i_profile_idc == 100 || i_profile_idc == 110 ||
i_profile_idc == 122 || i_profile_idc == 244 ||
i_profile_idc == 44 || i_profile_idc == 83 ||
i_profile_idc == 86 )
{
/* chroma_format_idc */
const int i_chroma_format_idc = bs_read_ue( &s );
if( i_chroma_format_idc == 3 )
bs_skip( &s, 1 ); /* separate_colour_plane_flag */
/* bit_depth_luma_minus8 */
bs_read_ue( &s );
/* bit_depth_chroma_minus8 */
bs_read_ue( &s );
/* qpprime_y_zero_transform_bypass_flag */
bs_skip( &s, 1 );
/* seq_scaling_matrix_present_flag */
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
for( int i = 0; i < ((3 != i_chroma_format_idc) ? 8 : 12); i++ )
{
/* seq_scaling_list_present_flag[i] */
i_tmp = bs_read( &s, 1 );
if( !i_tmp )
continue;
const int i_size_of_scaling_list = (i < 6 ) ? 16 : 64;
/* scaling_list (...) */
int i_lastscale = 8;
int i_nextscale = 8;
for( int j = 0; j < i_size_of_scaling_list; j++ )
{
if( i_nextscale != 0 )
{
/* delta_scale */
i_tmp = bs_read_se( &s );
i_nextscale = ( i_lastscale + i_tmp + 256 ) % 256;
/* useDefaultScalingMatrixFlag = ... */
}
/* scalinglist[j] */
i_lastscale = ( i_nextscale == 0 ) ? i_lastscale : i_nextscale;
}
}
}
}
/* Skip i_log2_max_frame_num */
p_sys->i_log2_max_frame_num = bs_read_ue( &s );
if( p_sys->i_log2_max_frame_num > 12)
p_sys->i_log2_max_frame_num = 12;
/* Read poc_type */
p_sys->i_pic_order_cnt_type = bs_read_ue( &s );
if( p_sys->i_pic_order_cnt_type == 0 )
{
/* skip i_log2_max_poc_lsb */
p_sys->i_log2_max_pic_order_cnt_lsb = bs_read_ue( &s );
if( p_sys->i_log2_max_pic_order_cnt_lsb > 12 )
p_sys->i_log2_max_pic_order_cnt_lsb = 12;
}
else if( p_sys->i_pic_order_cnt_type == 1 )
{
int i_cycle;
/* skip b_delta_pic_order_always_zero */
p_sys->i_delta_pic_order_always_zero_flag = bs_read( &s, 1 );
/* skip i_offset_for_non_ref_pic */
bs_read_se( &s );
/* skip i_offset_for_top_to_bottom_field */
bs_read_se( &s );
/* read i_num_ref_frames_in_poc_cycle */
i_cycle = bs_read_ue( &s );
if( i_cycle > 256 ) i_cycle = 256;
while( i_cycle > 0 )
{
/* skip i_offset_for_ref_frame */
bs_read_se(&s );
i_cycle--;
}
}
/* i_num_ref_frames */
bs_read_ue( &s );
/* b_gaps_in_frame_num_value_allowed */
bs_skip( &s, 1 );
/* Read size */
p_dec->fmt_out.video.i_width = 16 * ( bs_read_ue( &s ) + 1 );
p_dec->fmt_out.video.i_height = 16 * ( bs_read_ue( &s ) + 1 );
/* b_frame_mbs_only */
p_sys->b_frame_mbs_only = bs_read( &s, 1 );
p_dec->fmt_out.video.i_height *= ( 2 - p_sys->b_frame_mbs_only );
if( p_sys->b_frame_mbs_only == 0 )
{
bs_skip( &s, 1 );
}
/* b_direct8x8_inference */
bs_skip( &s, 1 );
/* crop */
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
/* left */
bs_read_ue( &s );
/* right */
bs_read_ue( &s );
/* top */
bs_read_ue( &s );
/* bottom */
bs_read_ue( &s );
}
/* vui */
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
/* read the aspect ratio part if any */
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
static const struct { int w, h; } sar[17] =
{
{ 0, 0 }, { 1, 1 }, { 12, 11 }, { 10, 11 },
{ 16, 11 }, { 40, 33 }, { 24, 11 }, { 20, 11 },
{ 32, 11 }, { 80, 33 }, { 18, 11 }, { 15, 11 },
{ 64, 33 }, { 160,99 }, { 4, 3 }, { 3, 2 },
{ 2, 1 },
};
int i_sar = bs_read( &s, 8 );
int w, h;
if( i_sar < 17 )
{
w = sar[i_sar].w;
h = sar[i_sar].h;
}
else if( i_sar == 255 )
{
w = bs_read( &s, 16 );
h = bs_read( &s, 16 );
}
else
{
w = 0;
h = 0;
}
if( w != 0 && h != 0 )
{
p_dec->fmt_out.video.i_sar_num = w;
p_dec->fmt_out.video.i_sar_den = h;
}
else
{
p_dec->fmt_out.video.i_sar_num = 1;
p_dec->fmt_out.video.i_sar_den = 1;
}
}
}
free( pb_dec );
/* We have a new SPS */
if( !p_sys->b_sps )
msg_Dbg( p_dec, "found NAL_SPS (sps_id=%d)", i_sps_id );
p_sys->b_sps = true;
if( p_sys->pp_sps[i_sps_id] )
block_Release( p_sys->pp_sps[i_sps_id] );
p_sys->pp_sps[i_sps_id] = p_frag;
}
/*****************************************************************************
* ParseNALBlock: parses annexB type NALs
* All p_frag blocks are required to start with 0 0 0 1 4-byte startcode
*****************************************************************************/
static block_t *ParseNALBlock( decoder_t *p_dec, block_t *p_frag )
{
decoder_sys_t *p_sys = p_dec->p_sys;
block_t *p_pic = NULL;
const int i_nal_ref_idc = (p_frag->p_buffer[4] >> 5)&0x03;
const int i_nal_type = p_frag->p_buffer[4]&0x1f;
#define OUTPUT \
do { \
if( !p_sys->b_header && p_sys->slice.i_frame_type != BLOCK_FLAG_TYPE_I) \
break; \
\
if( p_sys->slice.i_frame_type == BLOCK_FLAG_TYPE_I && p_sys->p_sps && p_sys->p_pps && !p_sys->b_header ) \
{ \
block_t *p_sps = block_Duplicate( p_sys->p_sps ); \
block_t *p_pps = block_Duplicate( p_sys->p_pps ); \
p_sps->i_dts = p_sys->p_frame->i_dts; \
p_sps->i_pts = p_sys->p_frame->i_pts; \
block_ChainAppend( &p_sps, p_pps ); \
block_ChainAppend( &p_sps, p_sys->p_frame ); \
p_sys->b_header = VLC_TRUE; \
p_pic = block_ChainGather( p_sps ); \
} else { \
p_pic = block_ChainGather( p_sys->p_frame ); \
} \
p_pic->i_length = 0; /* FIXME */ \
p_pic->i_flags |= p_sys->slice.i_frame_type; \
\
p_sys->slice.i_frame_type = 0; \
p_sys->p_frame = NULL; \
p_sys->b_slice = VLC_FALSE; \
} while(0)
if( p_sys->b_slice && ( !p_sys->b_sps || !p_sys->b_pps ) )
{
block_ChainRelease( p_sys->p_frame );
msg_Warn( p_dec, "waiting for SPS/PPS" );
/* Reset context */
p_sys->slice.i_frame_type = 0;
p_sys->p_frame = NULL;
p_sys->b_slice = VLC_FALSE;
}
if( ( !p_sys->b_sps || !p_sys->b_pps ) &&
i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
{
p_sys->b_slice = VLC_TRUE;
/* Fragment will be discarded later on */
}
else if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
{
uint8_t *dec;
int i_dec, i_first_mb, i_slice_type;
slice_t slice;
vlc_bool_t b_pic;
bs_t s;
/* do not convert the whole frame */
nal_get_decoded( &dec, &i_dec, &p_frag->p_buffer[5],
__MIN( p_frag->i_buffer - 5, 60 ) );
bs_init( &s, dec, i_dec );
/* first_mb_in_slice */
i_first_mb = bs_read_ue( &s );
/* slice_type */
switch( (i_slice_type = bs_read_ue( &s )) )
{
case 0: case 5:
slice.i_frame_type = BLOCK_FLAG_TYPE_P;
break;
case 1: case 6:
slice.i_frame_type = BLOCK_FLAG_TYPE_B;
break;
case 2: case 7:
slice.i_frame_type = BLOCK_FLAG_TYPE_I;
break;
case 3: case 8: /* SP */
slice.i_frame_type = BLOCK_FLAG_TYPE_P;
break;
case 4: case 9:
slice.i_frame_type = BLOCK_FLAG_TYPE_I;
break;
default:
slice.i_frame_type = 0;
break;
}
/* */
slice.i_nal_type = i_nal_type;
slice.i_nal_ref_idc = i_nal_ref_idc;
slice.i_pic_parameter_set_id = bs_read_ue( &s );
slice.i_frame_num = bs_read( &s, p_sys->i_log2_max_frame_num + 4 );
slice.i_field_pic_flag = 0;
slice.i_bottom_field_flag = -1;
if( !p_sys->b_frame_mbs_only )
{
/* field_pic_flag */
slice.i_field_pic_flag = bs_read( &s, 1 );
if( slice.i_field_pic_flag )
slice.i_bottom_field_flag = bs_read( &s, 1 );
}
slice.i_idr_pic_id = p_sys->slice.i_idr_pic_id;
if( slice.i_nal_type == NAL_SLICE_IDR )
slice.i_idr_pic_id = bs_read_ue( &s );
slice.i_pic_order_cnt_lsb = -1;
slice.i_delta_pic_order_cnt_bottom = -1;
slice.i_delta_pic_order_cnt0 = 0;
slice.i_delta_pic_order_cnt1 = 0;
if( p_sys->i_pic_order_cnt_type == 0 )
{
slice.i_pic_order_cnt_lsb = bs_read( &s, p_sys->i_log2_max_pic_order_cnt_lsb + 4 );
if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
slice.i_delta_pic_order_cnt_bottom = bs_read_se( &s );
}
else if( p_sys->i_pic_order_cnt_type == 1 && !p_sys->i_delta_pic_order_always_zero_flag )
{
slice.i_delta_pic_order_cnt0 = bs_read_se( &s );
if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
slice.i_delta_pic_order_cnt1 = bs_read_se( &s );
}
/* Detection of the first VCL NAL unit of a primary coded picture
* (cf. 7.4.1.2.4) */
b_pic = VLC_FALSE;
if( slice.i_frame_num != p_sys->slice.i_frame_num ||
slice.i_pic_parameter_set_id != p_sys->slice.i_pic_parameter_set_id ||
slice.i_field_pic_flag != p_sys->slice.i_field_pic_flag ||
slice.i_nal_ref_idc != p_sys->slice.i_nal_ref_idc )
b_pic = VLC_TRUE;
if( slice.i_bottom_field_flag != -1 && p_sys->slice.i_bottom_field_flag != -1 && slice.i_bottom_field_flag != p_sys->slice.i_bottom_field_flag )
b_pic = VLC_TRUE;
if( p_sys->i_pic_order_cnt_type == 0 &&
( slice.i_pic_order_cnt_lsb != p_sys->slice.i_pic_order_cnt_lsb ||
slice.i_delta_pic_order_cnt_bottom != p_sys->slice.i_delta_pic_order_cnt_bottom ) )
b_pic = VLC_TRUE;
else if( p_sys->i_pic_order_cnt_type == 1 &&
( slice.i_delta_pic_order_cnt0 != p_sys->slice.i_delta_pic_order_cnt0 ||
slice.i_delta_pic_order_cnt1 != p_sys->slice.i_delta_pic_order_cnt1 ) )
b_pic = VLC_TRUE;
if( ( slice.i_nal_type == NAL_SLICE_IDR || p_sys->slice.i_nal_type == NAL_SLICE_IDR ) &&
( slice.i_nal_type != p_sys->slice.i_nal_type || slice.i_idr_pic_id != p_sys->slice.i_idr_pic_id ) )
b_pic = VLC_TRUE;
/* */
p_sys->slice = slice;
if( b_pic && p_sys->b_slice )
OUTPUT;
p_sys->b_slice = VLC_TRUE;
free( dec );
}
else if( i_nal_type == NAL_SPS )
{
uint8_t *dec;
int i_dec;
bs_t s;
int i_tmp;
if( !p_sys->b_sps ) msg_Dbg( p_dec, "found NAL_SPS" );
p_sys->b_sps = VLC_TRUE;
nal_get_decoded( &dec, &i_dec, &p_frag->p_buffer[5],
p_frag->i_buffer - 5 );
bs_init( &s, dec, i_dec );
/* Skip profile(8), constraint_set012, reserver(5), level(8) */
bs_skip( &s, 8 + 1+1+1 + 5 + 8 );
/* sps id */
bs_read_ue( &s );
/* Skip i_log2_max_frame_num */
p_sys->i_log2_max_frame_num = bs_read_ue( &s );
if( p_sys->i_log2_max_frame_num > 12)
p_sys->i_log2_max_frame_num = 12;
/* Read poc_type */
p_sys->i_pic_order_cnt_type = bs_read_ue( &s );
if( p_sys->i_pic_order_cnt_type == 0 )
{
/* skip i_log2_max_poc_lsb */
p_sys->i_log2_max_pic_order_cnt_lsb = bs_read_ue( &s );
if( p_sys->i_log2_max_pic_order_cnt_lsb > 12 )
p_sys->i_log2_max_pic_order_cnt_lsb = 12;
}
else if( p_sys->i_pic_order_cnt_type == 1 )
{
int i_cycle;
/* skip b_delta_pic_order_always_zero */
p_sys->i_delta_pic_order_always_zero_flag = bs_read( &s, 1 );
/* skip i_offset_for_non_ref_pic */
bs_read_se( &s );
/* skip i_offset_for_top_to_bottom_field */
bs_read_se( &s );
/* read i_num_ref_frames_in_poc_cycle */
i_cycle = bs_read_ue( &s );
if( i_cycle > 256 ) i_cycle = 256;
while( i_cycle > 0 )
{
/* skip i_offset_for_ref_frame */
bs_read_se(&s );
}
}
/* i_num_ref_frames */
bs_read_ue( &s );
/* b_gaps_in_frame_num_value_allowed */
bs_skip( &s, 1 );
/* Read size */
p_dec->fmt_out.video.i_width = 16 * ( bs_read_ue( &s ) + 1 );
p_dec->fmt_out.video.i_height = 16 * ( bs_read_ue( &s ) + 1 );
/* b_frame_mbs_only */
p_sys->b_frame_mbs_only = bs_read( &s, 1 );
if( p_sys->b_frame_mbs_only == 0 )
{
bs_skip( &s, 1 );
}
/* b_direct8x8_inference */
bs_skip( &s, 1 );
/* crop */
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
/* left */
bs_read_ue( &s );
/* right */
bs_read_ue( &s );
/* top */
bs_read_ue( &s );
/* bottom */
bs_read_ue( &s );
}
/* vui */
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
/* read the aspect ratio part if any FIXME check it */
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
static const struct { int w, h; } sar[14] =
{
{ 0, 0 }, { 1, 1 }, { 12, 11 }, { 10, 11 },
{ 16, 11 }, { 40, 33 }, { 24, 11 }, { 20, 11 },
{ 32, 11 }, { 80, 33 }, { 18, 11 }, { 15, 11 },
{ 64, 33 }, { 160,99 },
};
int i_sar = bs_read( &s, 8 );
int w, h;
if( i_sar < 14 )
{
w = sar[i_sar].w;
h = sar[i_sar].h;
}
else
{
w = bs_read( &s, 16 );
h = bs_read( &s, 16 );
}
if( h != 0 )
p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR * w /
h * p_dec->fmt_out.video.i_width /
p_dec->fmt_out.video.i_height;
else
p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR;
}
}
free( dec );
if( p_sys->b_slice ) OUTPUT;
/* We have a new SPS */
if( p_sys->p_sps ) block_Release( p_sys->p_sps );
p_sys->p_sps = p_frag;
/* Do not append the SPS because we will insert it on keyframes */
return p_pic;
}
else if( i_nal_type == NAL_PPS )
{
bs_t s;
bs_init( &s, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
bs_read_ue( &s ); // pps id
bs_read_ue( &s ); // sps id
bs_skip( &s, 1 ); // entropy coding mode flag
p_sys->i_pic_order_present_flag = bs_read( &s, 1 );
if( !p_sys->b_pps ) msg_Dbg( p_dec, "found NAL_PPS" );
p_sys->b_pps = VLC_TRUE;
/* TODO */
if( p_sys->b_slice ) OUTPUT;
/* We have a new PPS */
if( p_sys->p_pps ) block_Release( p_sys->p_pps );
p_sys->p_pps = p_frag;
/* Do not append the PPS because we will insert it on keyframes */
return p_pic;
}
else if( i_nal_type == NAL_AU_DELIMITER ||
i_nal_type == NAL_SEI ||
( i_nal_type >= 13 && i_nal_type <= 18 ) )
{
if( p_sys->b_slice ) OUTPUT;
}
#undef OUTPUT
/* Append the block */
block_ChainAppend( &p_sys->p_frame, p_frag );
return p_pic;
}
/* ParseVOL:
* TODO:
* - support aspect ratio
*/
static int ParseVOL( decoder_t *p_dec, es_format_t *fmt,
uint8_t *p_vol, int i_vol )
{
decoder_sys_t *p_sys = p_dec->p_sys;
int i_vo_type, i_vo_ver_id, i_ar, i_shape;
bs_t s;
for( ;; )
{
if( p_vol[0] == 0x00 && p_vol[1] == 0x00 && p_vol[2] == 0x01 &&
p_vol[3] >= 0x20 && p_vol[3] <= 0x2f ) break;
p_vol++; i_vol--;
if( i_vol <= 4 ) return VLC_EGENERIC;
}
bs_init( &s, &p_vol[4], i_vol - 4 );
bs_skip( &s, 1 ); /* random access */
i_vo_type = bs_read( &s, 8 );
if( bs_read1( &s ) )
{
i_vo_ver_id = bs_read( &s, 4 );
bs_skip( &s, 3 );
}
else
{
i_vo_ver_id = 1;
}
i_ar = bs_read( &s, 4 );
if( i_ar == 0xf )
{
int i_ar_width, i_ar_height;
i_ar_width = bs_read( &s, 8 );
i_ar_height= bs_read( &s, 8 );
}
if( bs_read1( &s ) )
{
int i_chroma_format;
int i_low_delay;
/* vol control parameter */
i_chroma_format = bs_read( &s, 2 );
i_low_delay = bs_read1( &s );
if( bs_read1( &s ) ) /* vbv parameters */
{
unsigned int i_bitrate, i_vbv_buffer_size, i_vbv_occupancy;
i_bitrate = bs_read( &s, 15 ) << 15;
bs_skip( &s, 1 );
i_bitrate += bs_read( &s, 15 );
bs_skip( &s, 1 );
i_vbv_buffer_size = bs_read( &s, 15 ) << 3;
bs_skip( &s, 1 );
i_vbv_buffer_size += bs_read( &s, 3 );
i_vbv_occupancy = bs_read( &s, 11 ) << 15;
bs_skip( &s, 1 );
i_vbv_occupancy += bs_read( &s, 15 );
bs_skip( &s, 1 );
p_dec->fmt_out.i_bitrate = i_bitrate * 400;
p_dec->fmt_out.video.i_cpb_buffer = i_vbv_buffer_size * 16384;
p_dec->p_sys->i_vbv_occupancy = i_vbv_occupancy * 64;
}
}
/* shape 0->RECT, 1->BIN, 2->BIN_ONLY, 3->GRAY */
i_shape = bs_read( &s, 2 );
if( i_shape == 3 && i_vo_ver_id != 1 )
{
bs_skip( &s, 4 );
}
if( !bs_read1( &s ) ) return VLC_EGENERIC; /* Marker */
p_sys->i_fps_num = bs_read( &s, 16 ); /* Time increment resolution*/
if( !p_sys->i_fps_num ) p_sys->i_fps_num = 1;
if( !bs_read1( &s ) ) return VLC_EGENERIC; /* Marker */
if( bs_read1( &s ) )
{
int i_time_increment_bits = vlc_log2( p_sys->i_fps_num - 1 ) + 1;
if( i_time_increment_bits < 1 ) i_time_increment_bits = 1;
p_sys->i_fps_den = bs_read( &s, i_time_increment_bits );
}
if( i_shape == 0 )
{
bs_skip( &s, 1 );
fmt->video.i_width = bs_read( &s, 13 );
bs_skip( &s, 1 );
fmt->video.i_height= bs_read( &s, 13 );
bs_skip( &s, 1 );
}
return VLC_SUCCESS;
}
int h264_parse_sps( const uint8_t *p_sps_buf, int i_sps_size,
struct nal_sps *p_sps )
{
uint8_t *pb_dec = NULL;
int i_dec = 0;
bs_t s;
int i_tmp;
if (i_sps_size < 5 || (p_sps_buf[4] & 0x1f) != NAL_SPS)
return -1;
memset( p_sps, 0, sizeof(struct nal_sps) );
CreateRbspFromNAL( &pb_dec, &i_dec, &p_sps_buf[5],
i_sps_size - 5 );
bs_init( &s, pb_dec, i_dec );
int i_profile_idc = bs_read( &s, 8 );
p_sps->i_profile = i_profile_idc;
p_sps->i_profile_compatibility = bs_read( &s, 8 );
p_sps->i_level = bs_read( &s, 8 );
/* sps id */
p_sps->i_id = bs_read_ue( &s );
if( p_sps->i_id >= SPS_MAX || p_sps->i_id < 0 )
{
free( pb_dec );
return -1;
}
if( i_profile_idc == PROFILE_H264_HIGH || i_profile_idc == PROFILE_H264_HIGH_10 ||
i_profile_idc == PROFILE_H264_HIGH_422 || i_profile_idc == PROFILE_H264_HIGH_444_PREDICTIVE ||
i_profile_idc == PROFILE_H264_CAVLC_INTRA || i_profile_idc == PROFILE_H264_SVC_BASELINE ||
i_profile_idc == PROFILE_H264_SVC_HIGH )
{
/* chroma_format_idc */
const int i_chroma_format_idc = bs_read_ue( &s );
if( i_chroma_format_idc == 3 )
bs_skip( &s, 1 ); /* separate_colour_plane_flag */
/* bit_depth_luma_minus8 */
bs_read_ue( &s );
/* bit_depth_chroma_minus8 */
bs_read_ue( &s );
/* qpprime_y_zero_transform_bypass_flag */
bs_skip( &s, 1 );
/* seq_scaling_matrix_present_flag */
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
for( int i = 0; i < ((3 != i_chroma_format_idc) ? 8 : 12); i++ )
{
/* seq_scaling_list_present_flag[i] */
i_tmp = bs_read( &s, 1 );
if( !i_tmp )
continue;
const int i_size_of_scaling_list = (i < 6 ) ? 16 : 64;
/* scaling_list (...) */
int i_lastscale = 8;
int i_nextscale = 8;
for( int j = 0; j < i_size_of_scaling_list; j++ )
{
if( i_nextscale != 0 )
{
/* delta_scale */
i_tmp = bs_read_se( &s );
i_nextscale = ( i_lastscale + i_tmp + 256 ) % 256;
/* useDefaultScalingMatrixFlag = ... */
}
/* scalinglist[j] */
i_lastscale = ( i_nextscale == 0 ) ? i_lastscale : i_nextscale;
}
}
}
}
/* Skip i_log2_max_frame_num */
p_sps->i_log2_max_frame_num = bs_read_ue( &s );
if( p_sps->i_log2_max_frame_num > 12)
p_sps->i_log2_max_frame_num = 12;
/* Read poc_type */
p_sps->i_pic_order_cnt_type = bs_read_ue( &s );
if( p_sps->i_pic_order_cnt_type == 0 )
{
/* skip i_log2_max_poc_lsb */
p_sps->i_log2_max_pic_order_cnt_lsb = bs_read_ue( &s );
if( p_sps->i_log2_max_pic_order_cnt_lsb > 12 )
p_sps->i_log2_max_pic_order_cnt_lsb = 12;
}
else if( p_sps->i_pic_order_cnt_type == 1 )
{
int i_cycle;
/* skip b_delta_pic_order_always_zero */
p_sps->i_delta_pic_order_always_zero_flag = bs_read( &s, 1 );
/* skip i_offset_for_non_ref_pic */
bs_read_se( &s );
/* skip i_offset_for_top_to_bottom_field */
bs_read_se( &s );
/* read i_num_ref_frames_in_poc_cycle */
i_cycle = bs_read_ue( &s );
if( i_cycle > 256 ) i_cycle = 256;
while( i_cycle > 0 )
{
/* skip i_offset_for_ref_frame */
bs_read_se(&s );
i_cycle--;
}
}
/* i_num_ref_frames */
bs_read_ue( &s );
/* b_gaps_in_frame_num_value_allowed */
bs_skip( &s, 1 );
/* Read size */
p_sps->i_width = 16 * ( bs_read_ue( &s ) + 1 );
p_sps->i_height = 16 * ( bs_read_ue( &s ) + 1 );
/* b_frame_mbs_only */
p_sps->b_frame_mbs_only = bs_read( &s, 1 );
p_sps->i_height *= ( 2 - p_sps->b_frame_mbs_only );
if( p_sps->b_frame_mbs_only == 0 )
{
bs_skip( &s, 1 );
}
/* b_direct8x8_inference */
bs_skip( &s, 1 );
/* crop */
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
/* left */
bs_read_ue( &s );
/* right */
bs_read_ue( &s );
/* top */
bs_read_ue( &s );
/* bottom */
bs_read_ue( &s );
}
/* vui */
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
p_sps->vui.b_valid = true;
/* read the aspect ratio part if any */
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
static const struct { int w, h; } sar[17] =
{
{ 0, 0 }, { 1, 1 }, { 12, 11 }, { 10, 11 },
{ 16, 11 }, { 40, 33 }, { 24, 11 }, { 20, 11 },
{ 32, 11 }, { 80, 33 }, { 18, 11 }, { 15, 11 },
{ 64, 33 }, { 160,99 }, { 4, 3 }, { 3, 2 },
{ 2, 1 },
};
int i_sar = bs_read( &s, 8 );
int w, h;
if( i_sar < 17 )
{
w = sar[i_sar].w;
h = sar[i_sar].h;
}
else if( i_sar == 255 )
{
w = bs_read( &s, 16 );
h = bs_read( &s, 16 );
}
else
{
w = 0;
h = 0;
}
if( w != 0 && h != 0 )
{
p_sps->vui.i_sar_num = w;
p_sps->vui.i_sar_den = h;
}
else
{
p_sps->vui.i_sar_num = 1;
p_sps->vui.i_sar_den = 1;
}
}
/* overscan */
i_tmp = bs_read( &s, 1 );
if ( i_tmp )
bs_read( &s, 1 );
/* video signal type */
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
bs_read( &s, 4 );
/* colour desc */
bs_read( &s, 1 );
if ( i_tmp )
bs_read( &s, 24 );
}
/* chroma loc info */
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
bs_read_ue( &s );
bs_read_ue( &s );
}
/* timing info */
p_sps->vui.b_timing_info_present_flag = bs_read( &s, 1 );
if( p_sps->vui.b_timing_info_present_flag )
{
p_sps->vui.i_num_units_in_tick = bs_read( &s, 32 );
p_sps->vui.i_time_scale = bs_read( &s, 32 );
p_sps->vui.b_fixed_frame_rate = bs_read( &s, 1 );
}
/* Nal hrd & VC1 hrd parameters */
p_sps->vui.b_cpb_dpb_delays_present_flag = false;
for ( int i=0; i<2; i++ )
{
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
p_sps->vui.b_cpb_dpb_delays_present_flag = true;
uint32_t count = bs_read_ue( &s ) + 1;
bs_read( &s, 4 );
bs_read( &s, 4 );
for( uint32_t i=0; i<count; i++ )
{
bs_read_ue( &s );
bs_read_ue( &s );
bs_read( &s, 1 );
}
bs_read( &s, 5 );
p_sps->vui.i_cpb_removal_delay_length_minus1 = bs_read( &s, 5 );
p_sps->vui.i_dpb_output_delay_length_minus1 = bs_read( &s, 5 );
bs_read( &s, 5 );
}
}
if( p_sps->vui.b_cpb_dpb_delays_present_flag )
bs_read( &s, 1 );
/* pic struct info */
p_sps->vui.b_pic_struct_present_flag = bs_read( &s, 1 );
/* + unparsed remains */
}
free( pb_dec );
return 0;
}
int read_cdp( obe_user_data_t *user_data )
{
uint8_t *start = NULL, calc_cs = 0;
int cc_count = 0;
bs_read_t s;
bs_read_init( &s, user_data->data, user_data->len );
// cdp_header
if( bs_read( &s, 16 ) != CDP_IDENTIFIER )
{
syslog( LOG_ERR, "CDP identifier not found \n" );
return 1;
}
/* Verify Checksum */
for( int i = 0; i < user_data->len - 1; i++ )
calc_cs += user_data->data[i];
calc_cs = calc_cs ? 256 - calc_cs : 0;
if( calc_cs != user_data->data[user_data->len - 1] )
{
syslog( LOG_ERR, "Invalid checksum in Caption Distribution Packet \n" );
return 1;
}
bs_skip( &s, 8 ); // cdp_length
bs_skip( &s, 4 ); // cdp_frame_rate
bs_skip( &s, 4 ); // reserved
bs_skip( &s, 1 ); // time_code_present
bs_skip( &s, 1 ); // ccdata_present
bs_skip( &s, 1 ); // svcinfo_present
bs_skip( &s, 1 ); // svc_info_start
bs_skip( &s, 1 ); // svc_info_change
bs_skip( &s, 1 ); // svc_info_complete
/* caption_service_active seemingly unreliable */
bs_skip( &s, 1 ); // caption_service_active
bs_skip( &s, 1 ); // reserved
bs_skip( &s, 16 ); // cdp_hdr_sequence_cntr
while( !bs_read_eof( &s ) )
{
uint8_t section_id = bs_read( &s, 8 );
if( section_id == CDP_TC_SECTION_ID )
{
/* Is this timecode guaranteed to match VITC? */
bs_skip( &s, 2 ); // reserved
bs_skip( &s, 2 ); // tc_10hrs
bs_skip( &s, 4 ); // tc_1hrs
bs_skip( &s, 1 ); // reserved
bs_skip( &s, 3 ); // tc_10min
bs_skip( &s, 4 ); // tc_1min
bs_skip( &s, 1 ); // tc_field_flag
bs_skip( &s, 3 ); // tc_10sec
bs_skip( &s, 4 ); // tc_1sec
bs_skip( &s, 1 ); // drop_frame_flag
bs_skip( &s, 1 ); // zero
bs_skip( &s, 2 ); // tc_10fr
bs_skip( &s, 4 ); // tc_1fr
}
else if( section_id == CDP_CC_DATA_SECTION_ID )
{
cc_count = bs_read( &s, 8 ) & 0x1f;
start = &user_data->data[bs_read_pos( &s ) / 8];
for( int i = 0; i < cc_count; i++ )
{
bs_skip( &s, 5 ); // marker_bits
bs_skip( &s, 1 ); // cc_valid
bs_skip( &s, 2 ); // cc_type
bs_skip( &s, 8 ); // cc_data_1
bs_skip( &s, 8 ); // cc_data_2
}
}
else if( section_id == CDP_CC_SVC_INFO_SECTION_ID )
{
/* TODO: pass this to muxer when user requests */
bs_skip( &s, 1 ); // reserved
bs_skip( &s, 1 ); // svc_info_start
bs_skip( &s, 1 ); // svc_info_change
bs_skip( &s, 1 ); // svc_info_complete
int svc_count = bs_read( &s, 4 );
for( int i = 0; i < svc_count; i++ )
{
bs_skip( &s, 1 ); // reserved
bs_skip( &s, 1 ); // csn_size
bs_skip( &s, 6 ); // caption_service_number (note: csn_size branch in spec)
bs_skip( &s, 8 ); // svc_data_byte_1
bs_skip( &s, 8 ); // svc_data_byte_2
bs_skip( &s, 8 ); // svc_data_byte_3
bs_skip( &s, 8 ); // svc_data_byte_4
bs_skip( &s, 8 ); // svc_data_byte_5
bs_skip( &s, 8 ); // svc_data_byte_6
}
}
else if( section_id == CDP_FOOTER_SECTION_ID )
{
bs_skip( &s, 16 ); // cdp_ftr_sequence_cntr
bs_skip( &s, 8 ); // packet_checksum
break;
}
else // future_section
{
int future_len = bs_read( &s, 8 );
for( int i = 0; i < future_len; i++ )
bs_skip( &s, 8 );
}
}
if( !cc_count )
return 1;
if( write_708_cc( user_data, start, cc_count ) < 0 )
return -1;
return 0;
}
void Parser::parse(int *pb_nal_start)
{
h264_t *h = &h264;
bs_t s;
*pb_nal_start = 0;
if( nal.i_type == NAL_SPS || nal.i_type == NAL_PPS )
*pb_nal_start = 1;
bs_init( &s, nal.p_payload, nal.i_payload );
if( nal.i_type == NAL_SPS )
{
int i_tmp;
i_tmp = bs_read( &s, 8 );
bs_skip( &s, 1+1+1 + 5 + 8 );
/* sps id */
bs_read_ue( &s );
if( i_tmp >= 100 )
{
b_hiprofile = 1;
bs_read_ue( &s ); // chroma_format_idc
bs_read_ue( &s ); // bit_depth_luma_minus8
bs_read_ue( &s ); // bit_depth_chroma_minus8
bs_skip( &s, 1 ); // qpprime_y_zero_transform_bypass_flag
if( bs_read( &s, 1 ) ) // seq_scaling_matrix_present_flag
{
int i, j;
for( i = 0; i < 8; i++ )
{
if( bs_read( &s, 1 ) ) // seq_scaling_list_present_flag[i]
{
uint8 i_tmp = 8;
for( j = 0; j < (i<6?16:64); j++ )
{
i_tmp += bs_read_se( &s );
if( i_tmp == 0 )
break;
}
}
}
}
}
/* Skip i_log2_max_frame_num */
h->i_log2_max_frame_num = bs_read_ue( &s ) + 4;
/* Read poc_type */
h->i_poc_type = bs_read_ue( &s );
if( h->i_poc_type == 0 )
{
h->i_log2_max_poc_lsb = bs_read_ue( &s ) + 4;
}
else if( h->i_poc_type == 1 )
{
int i_cycle;
/* skip b_delta_pic_order_always_zero */
bs_skip( &s, 1 );
/* skip i_offset_for_non_ref_pic */
bs_read_se( &s );
/* skip i_offset_for_top_to_bottom_field */
bs_read_se( &s );
/* read i_num_ref_frames_in_poc_cycle */
i_cycle = bs_read_ue( &s );
if( i_cycle > 256 ) i_cycle = 256;
while( i_cycle > 0 )
{
/* skip i_offset_for_ref_frame */
bs_read_se(&s );
}
}
/* i_num_ref_frames */
bs_read_ue( &s );
/* b_gaps_in_frame_num_value_allowed */
bs_skip( &s, 1 );
/* Read size */
h->i_width = 16 * ( bs_read_ue( &s ) + 1 );
h->i_height = 32 * ( bs_read_ue( &s ) + 1 );
/* b_frame_mbs_only */
i_tmp = bs_read( &s, 1 );
if( i_tmp == 1 )
{
// fix: progressive, half height
h->i_height /= 2;
}
else
{
// mb_adaptive_frame_field_flag
bs_skip( &s, 1 );
}
/* b_direct8x8_inference */
bs_skip( &s, 1 );
/* crop ? */
i_tmp = bs_read( &s, 1 );
if( i_tmp )
{
// fix: no cropping
/* left */
//h->i_width -= 2 * bs_read_ue( &s );
/* right */
//h->i_width -= 2 * bs_read_ue( &s );
/* top */
//h->i_height -= 2 * bs_read_ue( &s );
/* bottom */
//h->i_height -= 2 * bs_read_ue( &s );
}
/* vui: ignored */
}
else if( nal.i_type >= NAL_SLICE && nal.i_type <= NAL_SLICE_IDR )
{
int i_tmp;
/* i_first_mb */
bs_read_ue( &s );
/* picture type */
switch( bs_read_ue( &s ) )
{
case 0: case 5: /* P */
case 1: case 6: /* B */
case 3: case 8: /* SP */
h->b_key = 0;
break;
case 2: case 7: /* I */
case 4: case 9: /* SI */
// fix: key flags in high profile
h->b_key = (nal.i_type == NAL_SLICE_IDR || (b_hiprofile && nal.i_type == NAL_SLICE));
break;
}
/* pps id */
bs_read_ue( &s );
/* frame num */
i_tmp = bs_read( &s, h->i_log2_max_frame_num );
if( i_tmp != h->i_frame_num )
*pb_nal_start = 1;
h->i_frame_num = i_tmp;
if( nal.i_type == NAL_SLICE_IDR )
{
i_tmp = bs_read_ue( &s );
if( h->i_nal_type == NAL_SLICE_IDR && h->i_idr_pic_id != i_tmp )
*pb_nal_start = 1;
h->i_idr_pic_id = i_tmp;
}
if( h->i_poc_type == 0 )
{
i_tmp = bs_read( &s, h->i_log2_max_poc_lsb );
if( i_tmp != h->i_poc )
*pb_nal_start = 1;
h->i_poc = i_tmp;
}
}
h->i_nal_type = nal.i_type;
h->i_ref_idc = nal.i_ref_idc;
}