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/*****************************************************************
* gmerlin-avdecoder - a general purpose multimedia decoding library
*
* Copyright (c) 2001 - 2012 Members of the Gmerlin project
* gmerlin-general@lists.sourceforge.net
* http://gmerlin.sourceforge.net
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* *****************************************************************/
/* H.264 stuff */
const uint8_t *
bgav_h264_find_nal_start(const uint8_t * buffer, int len);
/* Returns -1 if the buffer doesn't contain the start of the next
NAL */
int bgav_h264_get_nal_size(const uint8_t * buffer, int len);
/* NAL unit types */
#define H264_NAL_NON_IDR_SLICE 1
#define H264_NAL_SLICE_PARTITION_A 2
#define H264_NAL_SLICE_PARTITION_B 3
#define H264_NAL_SLICE_PARTITION_C 4
#define H264_NAL_IDR_SLICE 5
#define H264_NAL_SEI 6
#define H264_NAL_SPS 7
#define H264_NAL_PPS 8
#define H264_NAL_ACCESS_UNIT_DEL 9
#define H264_NAL_END_OF_SEQUENCE 10
#define H264_NAL_END_OF_STREAM 11
#define H264_NAL_FILLER_DATA 12
typedef struct
{
int ref_idc;
int unit_type;
} bgav_h264_nal_header_t;
/* rbsp must have at least the size of in_buffer */
int bgav_h264_decode_nal_header(const uint8_t * in_buffer, int len,
bgav_h264_nal_header_t * header);
/* Returns the number of bytes read */
/* RBSP = raw byte sequence payload */
int bgav_h264_decode_nal_rbsp(const uint8_t * in_buffer, int len,
uint8_t * ret);
/* VUI (Video Usability Information) */
typedef struct
{
int aspect_ratio_info_present_flag;
// if( aspect_ratio_info_present_flag ) {
int aspect_ratio_idc;
// if( aspect_ratio_idc = = Extended_SAR ) {
int sar_width;
int sar_height;
// }
// }
int overscan_info_present_flag;
// if( overscan_info_present_flag )
int overscan_appropriate_flag;
int video_signal_type_present_flag;
// if( video_signal_type_present_flag ) {
int video_format;
int video_full_range_flag;
int colour_description_present_flag;
// if( colour_description_present_flag ) {
int colour_primaries;
int transfer_characteristics;
int matrix_coefficients;
// }
// }
int chroma_loc_info_present_flag;
// if( chroma_loc_info_present_flag ) {
int chroma_sample_loc_type_top_field;
int chroma_sample_loc_type_bottom_field;
// }
int timing_info_present_flag;
// if( timing_info_present_flag ) {
int num_units_in_tick;
int time_scale;
int fixed_frame_rate_flag;
// }
int nal_hrd_parameters_present_flag;
int vcl_hrd_parameters_present_flag;
int cpb_removal_delay_length_minus1;
int dpb_output_delay_length_minus1;
int low_delay_hrd_flag;
int pic_struct_present_flag;
int bitstream_restriction_flag;
// if( bitstream_restriction_flag ) {
int motion_vectors_over_pic_boundaries_flag;
int max_bytes_per_pic_denom;
int max_bits_per_mb_denom;
int log2_max_mv_length_horizontal;
int log2_max_mv_length_vertical;
int num_reorder_frames;
int max_dec_frame_buffering;
// }
} bgav_h264_vui_t;
/* Sequence parameter set */
typedef struct
{
int profile_idc;
int constraint_set0_flag;
int constraint_set1_flag;
int constraint_set2_flag;
int constraint_set3_flag;
int level_idc;
int seq_parameter_set_id;
int chroma_format_idc;
// if( chroma_format_idc == 3 )
int separate_colour_plane_flag;
int bit_depth_luma_minus8;
int bit_depth_chroma_minus8;
int qpprime_y_zero_transform_bypass_flag;
int seq_scaling_matrix_present_flag;
int log2_max_frame_num_minus4;
int pic_order_cnt_type;
/* if( pic_order_cnt_type == 0 ) */
int log2_max_pic_order_cnt_lsb_minus4;
/* else if(pic_order_cnt_type == 1) { */
int delta_pic_order_always_zero_flag;
int offset_for_non_ref_pic;
int offset_for_top_to_bottom_field;
int num_ref_frames_in_pic_order_cnt_cycle;
int * offset_for_ref_frame;
/* } */
int num_ref_frames;
int gaps_in_frame_num_value_allowed_flag;
int pic_width_in_mbs_minus1;
int pic_height_in_map_units_minus1;
int frame_mbs_only_flag;
/* if( !frame_mbs_only_flag ) */
int mb_adaptive_frame_field_flag;
int direct_8x8_inference_flag;
int frame_cropping_flag;
/* if( frame_cropping_flag ) { */
int frame_crop_left_offset;
int frame_crop_right_offset;
int frame_crop_top_offset;
int frame_crop_bottom_offset;
/* } */
int vui_parameters_present_flag;
bgav_h264_vui_t vui;
} bgav_h264_sps_t;
int bgav_h264_sps_parse(const bgav_options_t * opt,
bgav_h264_sps_t *,
const uint8_t * buffer, int len);
void bgav_h264_sps_free(bgav_h264_sps_t *);
void bgav_h264_sps_dump(bgav_h264_sps_t *);
void bgav_h264_sps_get_image_size(bgav_h264_sps_t * sps,
gavl_video_format_t * format);
#if 0 /* Not needed */
typedef struct
{
} bgav_h264_pps_t;
int bgav_h264_pps_parse(const bgav_options_t * opt,
bgav_h264_pps_t *,
const uint8_t * buffer, int len);
#endif
/* SEI stuff */
int bgav_h264_decode_sei_message_header(const uint8_t * data, int len,
int * sei_type, int * sei_size);
typedef struct
{
int pic_struct;
int have_timecode;
int tc_hours;
int tc_minutes;
int tc_seconds;
int tc_frames;
int counting_type;
} bgav_h264_sei_pic_timing_t;
int bgav_h264_decode_sei_pic_timing(const uint8_t * data, int len,
bgav_h264_sps_t * sps,
bgav_h264_sei_pic_timing_t * ret);
typedef struct
{
int recovery_frame_cnt;
int exact_match_flag;
int broken_link_flag;
int changing_slice_group_idc;
} bgav_h264_sei_recovery_point_t;
int bgav_h264_decode_sei_recovery_point(const uint8_t * data, int len,
bgav_h264_sei_recovery_point_t * ret);
/* Slice header */
typedef struct
{
int first_mb_in_slice;
int slice_type;
int pic_parameter_set_id;
// if( separate_colour_plane_flag = = 1 )
int colour_plane_id;
int frame_num;
// if( !frame_mbs_only_flag ) {
int field_pic_flag;
// if( field_pic_flag )
int bottom_field_flag;
// }
} bgav_h264_slice_header_t;
void bgav_h264_slice_header_parse(const uint8_t * data, int len,
const bgav_h264_sps_t * sps,
bgav_h264_slice_header_t * ret);
void bgav_h264_slice_header_dump(const bgav_h264_sps_t * sps,
const bgav_h264_slice_header_t * ret);
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