modules/codec/hxxx_helper.h

   1 /*****************************************************************************
   2  * hxxx_helper.h: AnnexB / avcC helper for dumb decoders
   3  *****************************************************************************
   4  * Copyright (C) 2017 VLC authors and VideoLAN
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include "config.h"
  23 #endif
  24
  25 #include <vlc_block.h>
  26 #include <vlc_fourcc.h>
  27
  28 #include "../packetizer/h264_nal.h"
  29 #include "../packetizer/hevc_nal.h"
  30
  31 struct hxxx_helper_nal
  32 {
  33     block_t *b;
  34     union {
  35         void                            *xps;
  36         h264_sequence_parameter_set_t   *h264_sps;
  37         h264_picture_parameter_set_t    *h264_pps;
  38         hevc_sequence_parameter_set_t   *hevc_sps;
  39         hevc_picture_parameter_set_t    *hevc_pps;
  40         hevc_video_parameter_set_t      *hevc_vps;
  41     };
  42 };
  43
  44 struct hxxx_helper
  45 {
  46     vlc_object_t *p_obj; /* for logs */
  47     vlc_fourcc_t i_codec;
  48     bool b_need_xvcC; /* Need avcC or hvcC */
  49
  50     bool b_is_xvcC;
  51     uint8_t i_nal_length_size;
  52     union {
  53         struct {
  54             struct hxxx_helper_nal sps_list[H264_SPS_ID_MAX + 1];
  55             struct hxxx_helper_nal pps_list[H264_PPS_ID_MAX + 1];
  56             uint8_t i_current_sps;
  57             uint8_t i_sps_count;
  58             uint8_t i_pps_count;
  59         } h264;
  60         struct {
  61             struct hxxx_helper_nal sps_list[HEVC_SPS_ID_MAX + 1];
  62             struct hxxx_helper_nal pps_list[HEVC_PPS_ID_MAX + 1];
  63             struct hxxx_helper_nal vps_list[HEVC_VPS_ID_MAX + 1];
  64             uint8_t i_current_sps;
  65             uint8_t i_current_vps;
  66             uint8_t i_sps_count;
  67             uint8_t i_pps_count;
  68             uint8_t i_vps_count;
  69         } hevc;
  70     };
  71
  72     /* Process the block: do the AnnexB <-> xvcC conversion if needed. If
  73      * p_config_changed is not NULL, parse nals to detect a SPS/PPS or a video
  74      * size change. */
  75     block_t * (*pf_process_block)(struct hxxx_helper *hh, block_t *p_block,
  76                                   bool *p_config_changed);
  77 };
  78
  79 void hxxx_helper_init(struct hxxx_helper *hh, vlc_object_t *p_obj,
  80                       vlc_fourcc_t i_codec, bool b_need_xvcC);
  81 void hxxx_helper_clean(struct hxxx_helper *hh);
  82
  83 int hxxx_helper_set_extra(struct hxxx_helper *hh, const void *p_extra,
  84                           size_t i_extra);
  85
  86 block_t *h264_helper_get_annexb_config(const struct hxxx_helper *hh);
  87 block_t *hevc_helper_get_annexb_config(const struct hxxx_helper *hh);
  88
  89 block_t *h264_helper_get_avcc_config(const struct hxxx_helper *hh);
  90 block_t *hevc_helper_get_hvcc_config(const struct hxxx_helper *hh);
  91
  92 int hxxx_helper_get_current_picture_size(const struct hxxx_helper *hh,
  93                                          unsigned *p_w, unsigned *p_h,
  94                                          unsigned *p_vw, unsigned *p_vh);
  95
  96 int hxxx_helper_get_current_sar(const struct hxxx_helper *hh, int *p_num, int *p_den);
  97
  98 int h264_helper_get_current_dpb_values(const struct hxxx_helper *hh,
  99                                        uint8_t *p_depth, unsigned *pi_delay);
 100
 101 int hxxx_helper_get_current_profile_level(const struct hxxx_helper *hh,
 102                                           uint8_t *p_profile, uint8_t *p_level);
 103
 104 int hxxx_helper_get_colorimetry(const struct hxxx_helper *hh,
 105                                 video_color_primaries_t *p_primaries,
 106                                 video_transfer_func_t *p_transfer,
 107                                 video_color_space_t *p_colorspace,
 108                                 bool *p_full_range);