static bool hevc_parse_scaling_list_rbsp( bs_t *p_bs )
{
if( bs_remain( p_bs ) < 16 )
return false;
for( int i=0; i<4; i++ )
{
for( int j=0; j<6; j += (i == 3) ? 3 : 1 )
{
if( bs_read1( p_bs ) == 0 )
bs_read_ue( p_bs );
else
{
unsigned nextCoef = 8;
unsigned coefNum = __MIN( 64, (1 << (4 + (i << 1))));
if( i > 1 )
{
nextCoef = bs_read_se( p_bs ) + 8;
}
for( unsigned k=0; k<coefNum; k++ )
{
nextCoef = ( nextCoef + bs_read_se( p_bs ) + 256 ) % 256;
}
}
}
}
return true;
}
//7.3.2.1.1 Scaling list syntax
void read_scaling_list(bs_t* b, int* scalingList, int sizeOfScalingList, int useDefaultScalingMatrixFlag)
{
int j;
if (scalingList == NULL)
{
return;
}
int lastScale = 8;
int nextScale = 8;
for (j = 0; j < sizeOfScalingList; j++)
{
if (nextScale != 0)
{
int delta_scale = bs_read_se(b);
nextScale = (lastScale + delta_scale + 256) % 256;
useDefaultScalingMatrixFlag = (j == 0 && nextScale == 0);
}
scalingList[j] = (nextScale == 0) ? lastScale : nextScale;
lastScale = scalingList[j];
}
}
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;
}
//7.3.2.1 Sequence parameter set RBSP syntax
void read_seq_parameter_set_rbsp(sps_t *sps, bs_t* b)
{
int i;
// NOTE can't read directly into sps because seq_parameter_set_id not yet known and so sps is not selected
int profile_idc = bs_read(b, 8);
int constraint_set0_flag = bs_read(b, 1);
int constraint_set1_flag = bs_read(b, 1);
int constraint_set2_flag = bs_read(b, 1);
int constraint_set3_flag = bs_read(b, 1);
int constraint_set4_flag = bs_read(b, 1);
int constraint_set5_flag = bs_read(b, 1);
int reserved_zero_2bits = bs_read(b, 2); /* all 0's */
int level_idc = bs_read(b, 8);
int seq_parameter_set_id = bs_read_ue(b);
memset(sps, 0, sizeof(sps_t));
sps->chroma_format_idc = 1;
sps->profile_idc = profile_idc; // bs_read(b, 8);
sps->constraint_set0_flag = constraint_set0_flag;//bs_read(b, 1);
sps->constraint_set1_flag = constraint_set1_flag;//bs_read(b, 1);
sps->constraint_set2_flag = constraint_set2_flag;//bs_read(b, 1);
sps->constraint_set3_flag = constraint_set3_flag;//bs_read(b, 1);
sps->constraint_set4_flag = constraint_set4_flag;//bs_read(b, 1);
sps->constraint_set5_flag = constraint_set5_flag;//bs_read(b, 1);
sps->reserved_zero_2bits = reserved_zero_2bits;//bs_read(b,2);
sps->level_idc = level_idc; //bs_read(b, 8);
sps->seq_parameter_set_id = seq_parameter_set_id; // bs_read_ue(b);
if (sps->profile_idc == 100 || sps->profile_idc == 110 ||
sps->profile_idc == 122 || sps->profile_idc == 144)
{
sps->chroma_format_idc = bs_read_ue(b);
if (sps->chroma_format_idc == 3)
{
sps->residual_colour_transform_flag = bs_read(b, 1);
}
sps->bit_depth_luma_minus8 = bs_read_ue(b);
sps->bit_depth_chroma_minus8 = bs_read_ue(b);
sps->qpprime_y_zero_transform_bypass_flag = bs_read(b, 1);
sps->seq_scaling_matrix_present_flag = bs_read(b, 1);
if (sps->seq_scaling_matrix_present_flag)
{
for (i = 0; i < 8; i++)
{
sps->seq_scaling_list_present_flag[i] = bs_read(b, 1);
if (sps->seq_scaling_list_present_flag[i])
{
if (i < 6)
{
read_scaling_list(b, sps->ScalingList4x4[i], 16,
sps->UseDefaultScalingMatrix4x4Flag[i]);
}
else
{
read_scaling_list(b, sps->ScalingList8x8[i - 6], 64,
sps->UseDefaultScalingMatrix8x8Flag[i - 6]);
}
}
}
}
}
sps->log2_max_frame_num_minus4 = bs_read_ue(b);
sps->pic_order_cnt_type = bs_read_ue(b);
if (sps->pic_order_cnt_type == 0)
{
sps->log2_max_pic_order_cnt_lsb_minus4 = bs_read_ue(b);
}
else if (sps->pic_order_cnt_type == 1)
{
sps->delta_pic_order_always_zero_flag = bs_read(b, 1);
sps->offset_for_non_ref_pic = bs_read_se(b);
sps->offset_for_top_to_bottom_field = bs_read_se(b);
sps->num_ref_frames_in_pic_order_cnt_cycle = bs_read_ue(b);
for (i = 0; i < sps->num_ref_frames_in_pic_order_cnt_cycle; i++)
{
sps->offset_for_ref_frame[i] = bs_read_se(b);
}
}
sps->num_ref_frames = bs_read_ue(b);
sps->gaps_in_frame_num_value_allowed_flag = bs_read(b, 1);
sps->pic_width_in_mbs_minus1 = bs_read_ue(b);
sps->pic_height_in_map_units_minus1 = bs_read_ue(b);
sps->frame_mbs_only_flag = bs_read(b, 1);
if (!sps->frame_mbs_only_flag)
{
sps->mb_adaptive_frame_field_flag = bs_read(b, 1);
}
sps->direct_8x8_inference_flag = bs_read(b, 1);
sps->frame_cropping_flag = bs_read(b, 1);
if (sps->frame_cropping_flag)
{
sps->frame_crop_left_offset = bs_read_ue(b);
sps->frame_crop_right_offset = bs_read_ue(b);
sps->frame_crop_top_offset = bs_read_ue(b);
sps->frame_crop_bottom_offset = bs_read_ue(b);
}
sps->vui_parameters_present_flag = bs_read(b, 1);
if (sps->vui_parameters_present_flag)
{
read_vui_parameters(sps, b);
}
//read_rbsp_trailing_bits(h, b);
}
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;
}
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;
}
/*****************************************************************************
* 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;
}
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;
}
static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
int i_nal_ref_idc, int i_nal_type, const block_t *p_frag )
{
decoder_sys_t *p_sys = p_dec->p_sys;
uint8_t *pb_dec;
int i_dec;
int i_slice_type;
slice_t slice;
bs_t s;
/* do not convert the whole frame */
CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
__MIN( p_frag->i_buffer - 5, 60 ) );
bs_init( &s, pb_dec, i_dec );
/* first_mb_in_slice */
/* int 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 );
}
free( pb_dec );
/* Detection of the first VCL NAL unit of a primary coded picture
* (cf. 7.4.1.2.4) */
bool b_pic = 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 = 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 = 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 = 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 = 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 = true;
/* */
*pb_new_picture = b_pic;
*p_slice = slice;
}
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[3] >> 5)&0x03;
const int i_nal_type = p_frag->p_buffer[3]&0x1f;
if( p_sys->b_slice && !p_sys->b_sps )
{
block_ChainRelease( p_sys->p_frame );
msg_Warn( p_dec, "waiting for SPS" );
/* Reset context */
p_sys->p_frame = NULL;
p_sys->b_slice = VLC_FALSE;
}
if( !p_sys->b_sps &&
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, i_frame_num, i_pic_flags = 0;
vlc_bool_t b_pic = VLC_FALSE;
bs_t s;
/* do not convert the whole frame */
nal_get_decoded( &dec, &i_dec, &p_frag->p_buffer[4],
__MIN( p_frag->i_buffer - 4, 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:
i_pic_flags = BLOCK_FLAG_TYPE_P;
break;
case 1:
case 6:
i_pic_flags = BLOCK_FLAG_TYPE_B;
break;
case 2:
case 7:
i_pic_flags = BLOCK_FLAG_TYPE_I;
break;
case 3:
case 8: /* SP */
i_pic_flags = BLOCK_FLAG_TYPE_P;
break;
case 4:
case 9:
i_pic_flags = BLOCK_FLAG_TYPE_I;
break;
}
/* pic_parameter_set_id */
bs_read_ue( &s );
/* frame_num */
i_frame_num = bs_read( &s, p_sys->i_log2_max_frame_num + 4 );
/* Detection of the first VCL NAL unit of a primary coded picture
* (cf. 7.4.1.2.4) */
if( i_frame_num != p_sys->i_frame_num ||
( (i_nal_ref_idc != p_sys->i_nal_ref_idc) &&
(!i_nal_ref_idc || !p_sys->i_nal_ref_idc) ) )
{
b_pic = VLC_TRUE;
}
p_sys->i_frame_num = i_frame_num;
p_sys->i_nal_ref_idc = i_nal_ref_idc;
if( !p_sys->b_frame_mbs_only )
{
/* field_pic_flag */
if( bs_read( &s, 1 ) )
{
/* bottom_field_flag */
bs_read( &s, 1 );
}
}
if( i_nal_type == NAL_SLICE_IDR )
{
/* id_pic_id */
int i_idr_pic_id = bs_read_ue( &s );
if( p_sys->i_nal_type != i_nal_type ) b_pic = VLC_TRUE;
if( p_sys->i_idr_pic_id != i_idr_pic_id ) b_pic = VLC_TRUE;
p_sys->i_idr_pic_id = i_idr_pic_id;
}
p_sys->i_nal_type = i_nal_type;
if( b_pic && p_sys->b_slice )
{
p_pic = block_ChainGather( p_sys->p_frame );
p_pic->i_dts = p_sys->i_dts;
p_pic->i_pts = p_sys->i_pts;
p_pic->i_length = 0; /* FIXME */
p_pic->i_flags = p_sys->i_flags;
/* Reset context */
p_sys->p_frame = NULL;
p_sys->b_slice = VLC_FALSE;
}
p_sys->b_slice = VLC_TRUE;
p_sys->i_flags = i_pic_flags;
p_sys->i_dts = p_frag->i_dts;
p_sys->i_pts = p_frag->i_pts;
free( dec );
}
else if( i_nal_type == NAL_SPS )
{
uint8_t *dec;
int i_dec;
bs_t s;
int i_tmp;
msg_Dbg( p_dec, "found NAL_SPS" );
p_sys->b_sps = VLC_TRUE;
nal_get_decoded( &dec, &i_dec, &p_frag->p_buffer[4],
p_frag->i_buffer - 4 );
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 );
/* Read poc_type */
i_tmp = bs_read_ue( &s );
if( i_tmp == 0 )
{
/* skip i_log2_max_poc_lsb */
bs_read_ue( &s );
}
else if( i_tmp == 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 */
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 );
}
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;
}
}
free( dec );
}
else if( i_nal_type == NAL_PPS )
{
bs_t s;
bs_init( &s, &p_frag->p_buffer[4], p_frag->i_buffer - 4 );
/* TODO */
msg_Dbg( p_dec, "found NAL_PPS" );
}
/* Append the block */
block_ChainAppend( &p_sys->p_frame, p_frag );
return p_pic;
}
bool
h264MediaStream::ParseSqs(const buf_share_ptr SqsNode)
{
assert(SqsNode);
if (StreamSps == NULL)
StreamSps = new h264_sps_t;
uint8_t *pb_dec = NULL;
int i_dec = 0;
bs_t s;
int i_sps_id;
i_dec = SqsNode->GetSizeValue();
int nal_hrd_parameters_present_flag, vcl_hrd_parameters_present_flag;
pb_dec = const_cast<uint8_t *>(SqsNode->GetBuffer());
//转化00 00 03为00 00
uint8_t *p_nal = new uint8_t[i_dec];
int pcount = 0;
for (int tmp = 1; tmp < i_dec ; tmp++)
{
if (tmp < i_dec - 3 && *(pb_dec + tmp) == 0x00 &&
*(pb_dec + tmp + 1) == 0x00 && *(pb_dec + tmp + 2) == 0x03)
{
p_nal[pcount++] = 0x00;
p_nal[pcount++] = 0x00;
//printf("count = %d %2X\n",tmp, *(p_nal + tmp));
tmp += 2;
continue;
}
p_nal[pcount++] = *(pb_dec + tmp);
}
pb_dec = p_nal;
//以下内容根据H264协议解读，属于直接复制粘贴代码 同parseslice
bs_init( &s, pb_dec, i_dec );
// profile(8)
StreamSps->profile_idc = bs_read( &s, 8);
/* constraint_set012, reserver(5), level(8) */
bs_skip( &s, 1+1+1 + 5 + 8 );
/* sps id */
i_sps_id = bs_read_ue( &s );
if( i_sps_id >= 32/*SPS_MAX*/ )
{
printf("invalid SPS (sps_id=%d)", i_sps_id );
delete pb_dec;
return false;
}
StreamSps->scaling_matrix_present = 0;
if(StreamSps->profile_idc >= 100) //high profile
{
if(bs_read_ue(&s) == 3) //chroma_format_idc
bs_read(&s, 1); //residual_color_transform_flag
bs_read_ue(&s); //bit_depth_luma_minus8
bs_read_ue(&s); //bit_depth_chroma_minus8
StreamSps->transform_bypass = bs_read(&s, 1);
bs_skip(&s, 1); //decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8);
}
/* Skip i_log2_max_frame_num */
StreamSps->log2_max_frame_num = bs_read_ue( &s );
if( StreamSps->log2_max_frame_num > 12)
StreamSps->log2_max_frame_num = 12;
/* Read poc_type */
StreamSps->poc_type/*->i_pic_order_cnt_type*/ = bs_read_ue( &s );
if( StreamSps->poc_type == 0 )
{
/* skip i_log2_max_poc_lsb */
StreamSps->log2_max_poc_lsb/*->i_log2_max_pic_order_cnt_lsb*/ = bs_read_ue( &s );
if( StreamSps->log2_max_poc_lsb > 12 )
StreamSps->log2_max_poc_lsb = 12;
}
else if( StreamSps->poc_type/*p_sys->i_pic_order_cnt_type*/ == 1 )
{
int i_cycle;
/* skip b_delta_pic_order_always_zero */
StreamSps->delta_pic_order_always_zero_flag/*->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 */
StreamSps->mb_width/*->fmt_out.video.i_width*/ = 16 * ( bs_read_ue( &s ) + 1 );
StreamSps->mb_height/*fmt_out.video.i_height*/ = 16 * ( bs_read_ue( &s ) + 1 );
/* b_frame_mbs_only */
StreamSps->frame_mbs_only_flag/*->b_frame_mbs_only*/ = bs_read( &s, 1 );
if( StreamSps->frame_mbs_only_flag == 0 )
{
bs_skip( &s, 1 );
}
/* b_direct8x8_inference */
bs_skip( &s, 1 );
/* crop */
StreamSps->crop = bs_read( &s, 1 );
if( StreamSps->crop )
{
/* left */
bs_read_ue( &s );
/* right */
bs_read_ue( &s );
/* top */
bs_read_ue( &s );
/* bottom */
bs_read_ue( &s );
}
/* vui */
StreamSps->vui_parameters_present_flag = bs_read( &s, 1 );
if( StreamSps->vui_parameters_present_flag )
{
int aspect_ratio_info_present_flag = bs_read( &s, 1 );
if( aspect_ratio_info_present_flag )
{
static const struct { int num, den; } 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 );
if( i_sar < 17 )
{
StreamSps->sar.num = sar[i_sar].num;
StreamSps->sar.den = sar[i_sar].den;
}
else if( i_sar == 255 )
{
StreamSps->sar.num = bs_read( &s, 16 );
StreamSps->sar.den = bs_read( &s, 16 );
}
else
{
StreamSps->sar.num = 0;
StreamSps->sar.den = 0;
}
//if( den != 0 )
// p_dec->fmt_out.video.i_aspect = (int64_t)VOUT_ASPECT_FACTOR *
// ( num * p_dec->fmt_out.video.i_width ) /
// ( den * p_dec->fmt_out.video.i_height);
//else
// p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR;
}
else
{
StreamSps->sar.num = 0;
StreamSps->sar.den = 0;
}
if(bs_read(&s, 1)) /* overscan_info_present_flag */
{
bs_read(&s, 1); /* overscan_appropriate_flag */
}
if(bs_read(&s, 1)) /* video_signal_type_present_flag */
{
bs_read(&s, 3); /* video_format */
bs_read(&s, 1); /* video_full_range_flag */
if(bs_read(&s, 1)) /* colour_description_present_flag */
{
bs_read(&s, 8); /* colour_primaries */
bs_read(&s, 8); /* transfer_characteristics */
bs_read(&s, 8); /* matrix_coefficients */
}
}
if(bs_read(&s, 1)) /* chroma_location_info_present_flag */
{
bs_read_ue(&s); /* chroma_sample_location_type_top_field */
bs_read_ue(&s); /* chroma_sample_location_type_bottom_field */
}
StreamSps->timing_info_present_flag = bs_read(&s, 1);
if(StreamSps->timing_info_present_flag)
{
StreamSps->num_units_in_tick = bs_read(&s, 32);
StreamSps->time_scale = bs_read(&s, 32);
StreamSps->fixed_frame_rate_flag = bs_read(&s, 1);
}
nal_hrd_parameters_present_flag = bs_read(&s, 1);
if(nal_hrd_parameters_present_flag)
h264_decode_hrd_parameters(s, StreamSps);
vcl_hrd_parameters_present_flag = bs_read(&s, 1);
if(vcl_hrd_parameters_present_flag)
h264_decode_hrd_parameters(s, StreamSps);
if(nal_hrd_parameters_present_flag || vcl_hrd_parameters_present_flag)
bs_read(&s, 1); /* low_delay_hrd_flag */
bs_read(&s, 1); /* pic_struct_present_flag */
StreamSps->bitstream_restriction_flag = bs_read(&s, 1);
if(StreamSps->bitstream_restriction_flag)
{
unsigned int num_reorder_frames;
bs_read(&s, 1); /* motion_vectors_over_pic_boundaries_flag */
bs_read_ue(&s); /* max_bytes_per_pic_denom */
bs_read_ue(&s); /* max_bits_per_mb_denom */
bs_read_ue(&s); /* log2_max_mv_length_horizontal */
bs_read_ue(&s); /* log2_max_mv_length_vertical */
num_reorder_frames= bs_read_ue(&s);
bs_read_ue(&s); /*max_dec_frame_buffering*/
if(num_reorder_frames > 16 /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){
printf("illegal num_reorder_frames %d\n", num_reorder_frames);
delete pb_dec;
return true;
}
StreamSps->num_reorder_frames= num_reorder_frames;
}
}
delete pb_dec;
return true;
}
void
h264MediaStream::ParseSlice(uint8_t* p_nal, int n_nal_size, int i_nal_type)
{
if(CurSlice == NULL)
CurSlice = new h264_slice_t;
//转化00 00 03为00 00
int icount = 0;
uint8_t p_slice[64] = {0};
int parcount = (n_nal_size>64?64:n_nal_size);
for (int t = 0; t < parcount; t++)
{
if (t < parcount-2 && p_nal[t] == 0x00 && p_nal[t + 1] == 0x00 && p_nal[t + 2] == 0x03)
{
p_slice[icount++] = 0x00;
p_slice[icount++] = 0x00;
t += 2;
continue;
}
p_slice[icount++] = p_nal[t];
}
bs_t s;
bs_init(&s, p_slice, icount);
bs_read_ue( &s ); // first_mb_in_slice
CurSlice->i_slice_type = bs_read_ue( &s ); // slice type
int i_pic_parameter_set_id = bs_read_ue( &s );
CurSlice->i_frame_num = bs_read( &s, StreamSps->log2_max_frame_num + 4 );
int i_field_pic_flag = 0;
int i_bottom_field_flag = -1;
if( !StreamSps->frame_mbs_only_flag)
{
/* field_pic_flag */
i_field_pic_flag = bs_read( &s, 1 );
if( i_field_pic_flag )
i_bottom_field_flag = bs_read( &s, 1 );
}
int i_idr_pic_id;
if( i_nal_type == 5/*NAL_SLICE_IDR*/ )
i_idr_pic_id = bs_read_ue( &s );
int i_delta_pic_order_cnt_bottom = -1;
int i_delta_pic_order_cnt0 = 0;
int i_delta_pic_order_cnt1 = 0;
CurSlice->i_pic_order_cnt_lsb = 0;
if( StreamSps->poc_type == 0 )
{
CurSlice->i_pic_order_cnt_lsb = bs_read( &s, StreamSps->log2_max_poc_lsb + 4 );
//if( g_pic_order_present_flag && !i_field_pic_flag )
// i_delta_pic_order_cnt_bottom = bs_read_se( &s );
}
else if( (StreamSps->poc_type == 1) &&
(!StreamSps->delta_pic_order_always_zero_flag) )
{
i_delta_pic_order_cnt0 = bs_read_se( &s );
//if( g_pic_order_present_flag && !i_field_pic_flag )
// i_delta_pic_order_cnt1 = bs_read_se( &s );
}
}
