LCOV - code coverage report
Current view: top level - libavcodec - dirac.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 101 143 70.6 %
Date: 2017-12-17 16:07:53 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
       3             :  * Copyright (C) 2009 David Conrad
       4             :  * Copyright (C) 2011 Jordi Ortiz
       5             :  *
       6             :  * This file is part of FFmpeg.
       7             :  *
       8             :  * FFmpeg is free software; you can redistribute it and/or
       9             :  * modify it under the terms of the GNU Lesser General Public
      10             :  * License as published by the Free Software Foundation; either
      11             :  * version 2.1 of the License, or (at your option) any later version.
      12             :  *
      13             :  * FFmpeg is distributed in the hope that it will be useful,
      14             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      16             :  * Lesser General Public License for more details.
      17             :  *
      18             :  * You should have received a copy of the GNU Lesser General Public
      19             :  * License along with FFmpeg; if not, write to the Free Software
      20             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      21             :  */
      22             : 
      23             : /**
      24             :  * @file
      25             :  * Dirac Decoder
      26             :  * @author Marco Gerards <marco@gnu.org>, David Conrad, Jordi Ortiz <nenjordi@gmail.com>
      27             :  */
      28             : 
      29             : #include "libavutil/imgutils.h"
      30             : 
      31             : #include "avcodec.h"
      32             : #include "dirac.h"
      33             : #include "golomb.h"
      34             : #include "internal.h"
      35             : #include "mpeg12data.h"
      36             : 
      37             : #if CONFIG_DIRAC_PARSE
      38             : 
      39             : typedef struct dirac_source_params {
      40             :     unsigned width;
      41             :     unsigned height;
      42             :     uint8_t chroma_format;          ///< 0: 444  1: 422  2: 420
      43             : 
      44             :     uint8_t interlaced;
      45             :     uint8_t top_field_first;
      46             : 
      47             :     uint8_t frame_rate_index;       ///< index into dirac_frame_rate[]
      48             :     uint8_t aspect_ratio_index;     ///< index into dirac_aspect_ratio[]
      49             : 
      50             :     uint16_t clean_width;
      51             :     uint16_t clean_height;
      52             :     uint16_t clean_left_offset;
      53             :     uint16_t clean_right_offset;
      54             : 
      55             :     uint8_t pixel_range_index;      ///< index into dirac_pixel_range_presets[]
      56             :     uint8_t color_spec_index;       ///< index into dirac_color_spec_presets[]
      57             : } dirac_source_params;
      58             : 
      59             : /* defaults for source parameters */
      60             : static const dirac_source_params dirac_source_parameters_defaults[] = {
      61             :     {  640,  480, 2, 0, 0,  1, 1,  640,  480, 0, 0, 1, 0 },
      62             :     {  176,  120, 2, 0, 0,  9, 2,  176,  120, 0, 0, 1, 1 },
      63             :     {  176,  144, 2, 0, 1, 10, 3,  176,  144, 0, 0, 1, 2 },
      64             :     {  352,  240, 2, 0, 0,  9, 2,  352,  240, 0, 0, 1, 1 },
      65             :     {  352,  288, 2, 0, 1, 10, 3,  352,  288, 0, 0, 1, 2 },
      66             :     {  704,  480, 2, 0, 0,  9, 2,  704,  480, 0, 0, 1, 1 },
      67             :     {  704,  576, 2, 0, 1, 10, 3,  704,  576, 0, 0, 1, 2 },
      68             :     {  720,  480, 1, 1, 0,  4, 2,  704,  480, 8, 0, 3, 1 },
      69             :     {  720,  576, 1, 1, 1,  3, 3,  704,  576, 8, 0, 3, 2 },
      70             : 
      71             :     { 1280,  720, 1, 0, 1,  7, 1, 1280,  720, 0, 0, 3, 3 },
      72             :     { 1280,  720, 1, 0, 1,  6, 1, 1280,  720, 0, 0, 3, 3 },
      73             :     { 1920, 1080, 1, 1, 1,  4, 1, 1920, 1080, 0, 0, 3, 3 },
      74             :     { 1920, 1080, 1, 1, 1,  3, 1, 1920, 1080, 0, 0, 3, 3 },
      75             :     { 1920, 1080, 1, 0, 1,  7, 1, 1920, 1080, 0, 0, 3, 3 },
      76             :     { 1920, 1080, 1, 0, 1,  6, 1, 1920, 1080, 0, 0, 3, 3 },
      77             :     { 2048, 1080, 0, 0, 1,  2, 1, 2048, 1080, 0, 0, 4, 4 },
      78             :     { 4096, 2160, 0, 0, 1,  2, 1, 4096, 2160, 0, 0, 4, 4 },
      79             : 
      80             :     { 3840, 2160, 1, 0, 1,  7, 1, 3840, 2160, 0, 0, 3, 3 },
      81             :     { 3840, 2160, 1, 0, 1,  6, 1, 3840, 2160, 0, 0, 3, 3 },
      82             :     { 7680, 4320, 1, 0, 1,  7, 1, 3840, 2160, 0, 0, 3, 3 },
      83             :     { 7680, 4320, 1, 0, 1,  6, 1, 3840, 2160, 0, 0, 3, 3 },
      84             : };
      85             : 
      86             : /* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */
      87             : static const AVRational dirac_preset_aspect_ratios[] = {
      88             :     {  1,  1 },
      89             :     { 10, 11 },
      90             :     { 12, 11 },
      91             :     { 40, 33 },
      92             :     { 16, 11 },
      93             :     {  4,  3 },
      94             : };
      95             : 
      96             : /* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate.
      97             :  * Table 10.3 Available preset frame rate values
      98             :  */
      99             : static const AVRational dirac_frame_rate[] = {
     100             :     { 15000, 1001 },
     101             :     {    25,    2 },
     102             : };
     103             : 
     104             : /* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal
     105             :  * range presets */
     106             : static const struct {
     107             :     uint8_t             bitdepth;
     108             :     enum AVColorRange   color_range;
     109             : } pixel_range_presets[] = {
     110             :     {  8, AVCOL_RANGE_JPEG },
     111             :     {  8, AVCOL_RANGE_MPEG },
     112             :     { 10, AVCOL_RANGE_MPEG },
     113             :     { 12, AVCOL_RANGE_MPEG },
     114             : };
     115             : 
     116             : static const enum AVColorPrimaries dirac_primaries[] = {
     117             :     AVCOL_PRI_BT709,
     118             :     AVCOL_PRI_SMPTE170M,
     119             :     AVCOL_PRI_BT470BG,
     120             : };
     121             : 
     122             : static const struct {
     123             :     enum AVColorPrimaries color_primaries;
     124             :     enum AVColorSpace colorspace;
     125             :     enum AVColorTransferCharacteristic color_trc;
     126             : } dirac_color_presets[] = {
     127             :     { AVCOL_PRI_BT709,     AVCOL_SPC_BT709,   AVCOL_TRC_BT709 },
     128             :     { AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
     129             :     { AVCOL_PRI_BT470BG,   AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
     130             :     { AVCOL_PRI_BT709,     AVCOL_SPC_BT709,   AVCOL_TRC_BT709 },
     131             :     { AVCOL_PRI_BT709,     AVCOL_SPC_BT709,   AVCOL_TRC_UNSPECIFIED /* DCinema */ },
     132             : };
     133             : 
     134             : /* [DIRAC_STD] Table 10.2 Supported chroma sampling formats */
     135             : static const enum AVPixelFormat dirac_pix_fmt[][3] = {
     136             :     {AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12},
     137             :     {AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P12},
     138             :     {AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P12},
     139             : };
     140             : 
     141             : /* [DIRAC_STD] 10.3 Parse Source Parameters.
     142             :  * source_parameters(base_video_format) */
     143          58 : static int parse_source_parameters(AVDiracSeqHeader *dsh, GetBitContext *gb,
     144             :                                    void *log_ctx)
     145             : {
     146          58 :     AVRational frame_rate = { 0, 0 };
     147          58 :     unsigned luma_depth = 8, luma_offset = 16;
     148             :     int idx;
     149             :     int chroma_x_shift, chroma_y_shift;
     150             :     int ret;
     151             : 
     152             :     /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
     153             :     /* [DIRAC_STD] custom_dimensions_flag */
     154          58 :     if (get_bits1(gb)) {
     155          58 :         dsh->width  = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH  */
     156          58 :         dsh->height = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */
     157             :     }
     158             : 
     159             :     /* [DIRAC_STD] 10.3.3 Chroma Sampling Format.
     160             :      *  chroma_sampling_format(video_params) */
     161             :     /* [DIRAC_STD] custom_chroma_format_flag */
     162          58 :     if (get_bits1(gb))
     163             :         /* [DIRAC_STD] CHROMA_FORMAT_INDEX */
     164          58 :         dsh->chroma_format = get_interleaved_ue_golomb(gb);
     165          58 :     if (dsh->chroma_format > 2U) {
     166           0 :         if (log_ctx)
     167           0 :             av_log(log_ctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
     168           0 :                    dsh->chroma_format);
     169           0 :         return AVERROR_INVALIDDATA;
     170             :     }
     171             : 
     172             :     /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */
     173             :     /* [DIRAC_STD] custom_scan_format_flag */
     174          58 :     if (get_bits1(gb))
     175             :         /* [DIRAC_STD] SOURCE_SAMPLING */
     176          58 :         dsh->interlaced = get_interleaved_ue_golomb(gb);
     177          58 :     if (dsh->interlaced > 1U)
     178           0 :         return AVERROR_INVALIDDATA;
     179             : 
     180             :     /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */
     181          58 :     if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */
     182          58 :         dsh->frame_rate_index = get_interleaved_ue_golomb(gb);
     183             : 
     184          58 :         if (dsh->frame_rate_index > 10U)
     185           0 :             return AVERROR_INVALIDDATA;
     186             : 
     187          58 :         if (!dsh->frame_rate_index) {
     188             :             /* [DIRAC_STD] FRAME_RATE_NUMER */
     189          54 :             frame_rate.num = get_interleaved_ue_golomb(gb);
     190             :             /* [DIRAC_STD] FRAME_RATE_DENOM */
     191          54 :             frame_rate.den = get_interleaved_ue_golomb(gb);
     192             :         }
     193             :     }
     194             :     /* [DIRAC_STD] preset_frame_rate(video_params, index) */
     195          58 :     if (dsh->frame_rate_index > 0) {
     196           4 :         if (dsh->frame_rate_index <= 8)
     197           4 :             frame_rate = ff_mpeg12_frame_rate_tab[dsh->frame_rate_index];
     198             :         else
     199             :             /* [DIRAC_STD] Table 10.3 values 9-10 */
     200           0 :             frame_rate = dirac_frame_rate[dsh->frame_rate_index - 9];
     201             :     }
     202          58 :     dsh->framerate = frame_rate;
     203             : 
     204             :     /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio.
     205             :      * pixel_aspect_ratio(video_params) */
     206          58 :     if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */
     207             :         /* [DIRAC_STD] index */
     208          58 :         dsh->aspect_ratio_index = get_interleaved_ue_golomb(gb);
     209             : 
     210          58 :         if (dsh->aspect_ratio_index > 6U)
     211           0 :             return AVERROR_INVALIDDATA;
     212             : 
     213          58 :         if (!dsh->aspect_ratio_index) {
     214          54 :             dsh->sample_aspect_ratio.num = get_interleaved_ue_golomb(gb);
     215          54 :             dsh->sample_aspect_ratio.den = get_interleaved_ue_golomb(gb);
     216             :         }
     217             :     }
     218             :     /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel
     219             :      *  aspect ratio values */
     220          58 :     if (dsh->aspect_ratio_index > 0)
     221           4 :         dsh->sample_aspect_ratio =
     222           4 :             dirac_preset_aspect_ratios[dsh->aspect_ratio_index - 1];
     223             : 
     224             :     /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */
     225          58 :     if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */
     226             :         /* [DIRAC_STD] CLEAN_WIDTH */
     227           4 :         dsh->clean_width = get_interleaved_ue_golomb(gb);
     228             :         /* [DIRAC_STD] CLEAN_HEIGHT */
     229           4 :         dsh->clean_height = get_interleaved_ue_golomb(gb);
     230             :         /* [DIRAC_STD] CLEAN_LEFT_OFFSET */
     231           4 :         dsh->clean_left_offset = get_interleaved_ue_golomb(gb);
     232             :         /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */
     233           4 :         dsh->clean_right_offset = get_interleaved_ue_golomb(gb);
     234             :     }
     235             : 
     236             :     /* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params)
     237             :      * WARNING: Some adaptation seems to be done using the
     238             :      * AVCOL_RANGE_MPEG/JPEG values */
     239          58 :     if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */
     240             :         /* [DIRAC_STD] index */
     241          58 :         dsh->pixel_range_index = get_interleaved_ue_golomb(gb);
     242             : 
     243          58 :         if (dsh->pixel_range_index > 4U)
     244           0 :             return AVERROR_INVALIDDATA;
     245             : 
     246             :         /* This assumes either fullrange or MPEG levels only */
     247          58 :         if (!dsh->pixel_range_index) {
     248           0 :             luma_offset = get_interleaved_ue_golomb(gb);
     249           0 :             luma_depth  = av_log2(get_interleaved_ue_golomb(gb)) + 1;
     250           0 :             get_interleaved_ue_golomb(gb); /* chroma offset    */
     251           0 :             get_interleaved_ue_golomb(gb); /* chroma excursion */
     252           0 :             dsh->color_range = luma_offset ? AVCOL_RANGE_MPEG
     253           0 :                                            : AVCOL_RANGE_JPEG;
     254             :         }
     255             :     }
     256             :     /* [DIRAC_STD] Table 10.5
     257             :      * Available signal range presets <--> pixel_range_presets */
     258          58 :     if (dsh->pixel_range_index > 0) {
     259          58 :         idx                = dsh->pixel_range_index - 1;
     260          58 :         luma_depth         = pixel_range_presets[idx].bitdepth;
     261          58 :         dsh->color_range   = pixel_range_presets[idx].color_range;
     262             :     }
     263             : 
     264          58 :     dsh->bit_depth = luma_depth;
     265             : 
     266             :     /* Full range 8 bts uses the same pix_fmts as limited range 8 bits */
     267          58 :     dsh->pixel_range_index += dsh->pixel_range_index == 1;
     268             : 
     269          58 :     if (dsh->pixel_range_index < 2U)
     270           0 :         return AVERROR_INVALIDDATA;
     271             : 
     272          58 :     dsh->pix_fmt = dirac_pix_fmt[dsh->chroma_format][dsh->pixel_range_index-2];
     273          58 :     ret = av_pix_fmt_get_chroma_sub_sample(dsh->pix_fmt, &chroma_x_shift, &chroma_y_shift);
     274          58 :     if (ret)
     275           0 :         return ret;
     276             : 
     277          58 :     if ((dsh->width % (1<<chroma_x_shift)) || (dsh->height % (1<<chroma_y_shift))) {
     278           0 :         if (log_ctx)
     279           0 :             av_log(log_ctx, AV_LOG_ERROR, "Dimensions must be an integer multiple of the chroma subsampling\n");
     280           0 :         return AVERROR_INVALIDDATA;
     281             :     }
     282             : 
     283             :     /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
     284          58 :     if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */
     285             :         /* [DIRAC_STD] index */
     286          58 :         idx = dsh->color_spec_index = get_interleaved_ue_golomb(gb);
     287             : 
     288          58 :         if (dsh->color_spec_index > 4U)
     289           0 :             return AVERROR_INVALIDDATA;
     290             : 
     291          58 :         dsh->color_primaries = dirac_color_presets[idx].color_primaries;
     292          58 :         dsh->colorspace      = dirac_color_presets[idx].colorspace;
     293          58 :         dsh->color_trc       = dirac_color_presets[idx].color_trc;
     294             : 
     295          58 :         if (!dsh->color_spec_index) {
     296             :             /* [DIRAC_STD] 10.3.9.1 Colour primaries */
     297          54 :             if (get_bits1(gb)) {
     298          54 :                 idx = get_interleaved_ue_golomb(gb);
     299          54 :                 if (idx < 3U)
     300          54 :                     dsh->color_primaries = dirac_primaries[idx];
     301             :             }
     302             :             /* [DIRAC_STD] 10.3.9.2 Colour matrix */
     303          54 :             if (get_bits1(gb)) {
     304          54 :                 idx = get_interleaved_ue_golomb(gb);
     305          54 :                 if (!idx)
     306          54 :                     dsh->colorspace = AVCOL_SPC_BT709;
     307           0 :                 else if (idx == 1)
     308           0 :                     dsh->colorspace = AVCOL_SPC_BT470BG;
     309             :             }
     310             :             /* [DIRAC_STD] 10.3.9.3 Transfer function */
     311          54 :             if (get_bits1(gb) && !get_interleaved_ue_golomb(gb))
     312          54 :                 dsh->color_trc = AVCOL_TRC_BT709;
     313             :         }
     314             :     } else {
     315           0 :         idx                    = dsh->color_spec_index;
     316           0 :         dsh->color_primaries = dirac_color_presets[idx].color_primaries;
     317           0 :         dsh->colorspace      = dirac_color_presets[idx].colorspace;
     318           0 :         dsh->color_trc       = dirac_color_presets[idx].color_trc;
     319             :     }
     320             : 
     321          58 :     return 0;
     322             : }
     323             : 
     324             : /* [DIRAC_STD] 10. Sequence Header. sequence_header() */
     325          58 : int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh,
     326             :                                    const uint8_t *buf, size_t buf_size,
     327             :                                    void *log_ctx)
     328             : {
     329             :     AVDiracSeqHeader *dsh;
     330             :     GetBitContext gb;
     331             :     unsigned video_format, picture_coding_mode;
     332             :     int ret;
     333             : 
     334          58 :     dsh = av_mallocz(sizeof(*dsh));
     335          58 :     if (!dsh)
     336           0 :         return AVERROR(ENOMEM);
     337             : 
     338          58 :     ret = init_get_bits8(&gb, buf, buf_size);
     339          58 :     if (ret < 0)
     340           0 :         goto fail;
     341             : 
     342             :     /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
     343          58 :     dsh->version.major = get_interleaved_ue_golomb(&gb);
     344          58 :     dsh->version.minor = get_interleaved_ue_golomb(&gb);
     345          58 :     dsh->profile   = get_interleaved_ue_golomb(&gb);
     346          58 :     dsh->level     = get_interleaved_ue_golomb(&gb);
     347             :     /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
     348             :      * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
     349          58 :     video_format = get_interleaved_ue_golomb(&gb);
     350             : 
     351          58 :     if (dsh->version.major < 2 && log_ctx)
     352           0 :         av_log(log_ctx, AV_LOG_WARNING, "Stream is old and may not work\n");
     353          58 :     else if (dsh->version.major > 2 && log_ctx)
     354           0 :         av_log(log_ctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
     355             : 
     356          58 :     if (video_format > 20U) {
     357           0 :         ret = AVERROR_INVALIDDATA;
     358           0 :         goto fail;
     359             :     }
     360             : 
     361             :     /* Fill in defaults for the source parameters. */
     362          58 :     dsh->width              = dirac_source_parameters_defaults[video_format].width;
     363          58 :     dsh->height             = dirac_source_parameters_defaults[video_format].height;
     364          58 :     dsh->chroma_format      = dirac_source_parameters_defaults[video_format].chroma_format;
     365          58 :     dsh->interlaced         = dirac_source_parameters_defaults[video_format].interlaced;
     366          58 :     dsh->top_field_first    = dirac_source_parameters_defaults[video_format].top_field_first;
     367          58 :     dsh->frame_rate_index   = dirac_source_parameters_defaults[video_format].frame_rate_index;
     368          58 :     dsh->aspect_ratio_index = dirac_source_parameters_defaults[video_format].aspect_ratio_index;
     369          58 :     dsh->clean_width        = dirac_source_parameters_defaults[video_format].clean_width;
     370          58 :     dsh->clean_height       = dirac_source_parameters_defaults[video_format].clean_height;
     371          58 :     dsh->clean_left_offset  = dirac_source_parameters_defaults[video_format].clean_left_offset;
     372          58 :     dsh->clean_right_offset = dirac_source_parameters_defaults[video_format].clean_right_offset;
     373          58 :     dsh->pixel_range_index  = dirac_source_parameters_defaults[video_format].pixel_range_index;
     374          58 :     dsh->color_spec_index   = dirac_source_parameters_defaults[video_format].color_spec_index;
     375             : 
     376             :     /* [DIRAC_STD] 10.3 Source Parameters
     377             :      * Override the defaults. */
     378          58 :     ret = parse_source_parameters(dsh, &gb, log_ctx);
     379          58 :     if (ret < 0)
     380           0 :         goto fail;
     381             : 
     382             :     /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
     383             :      * currently only used to signal field coding */
     384          58 :     picture_coding_mode = get_interleaved_ue_golomb(&gb);
     385          58 :     if (picture_coding_mode != 0) {
     386           0 :         if (log_ctx) {
     387           0 :             av_log(log_ctx, AV_LOG_ERROR, "Unsupported picture coding mode %d",
     388             :                    picture_coding_mode);
     389             :         }
     390           0 :         ret = AVERROR_INVALIDDATA;
     391           0 :         goto fail;
     392             :     }
     393             : 
     394          58 :     *pdsh = dsh;
     395          58 :     return 0;
     396           0 : fail:
     397           0 :     av_freep(&dsh);
     398           0 :     *pdsh = NULL;
     399           0 :     return ret;
     400             : }
     401             : #else
     402             : int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh,
     403             :                                    const uint8_t *buf, size_t buf_size,
     404             :                                    void *log_ctx)
     405             : {
     406             :     return AVERROR(ENOSYS);
     407             : }
     408             : #endif

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