h264_ps.c 25.5 KB
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/*
 * H.26L/H.264/AVC/JVT/14496-10/... parameter set decoding
 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
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 * @file
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 * H.264 / AVC / MPEG4 part10 parameter set decoding.
 * @author Michael Niedermayer <michaelni@gmx.at>
 */

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#include "libavutil/imgutils.h"
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#include "internal.h"
#include "dsputil.h"
#include "avcodec.h"
#include "h264.h"
#include "h264data.h" //FIXME FIXME FIXME (just for zigzag_scan)
#include "golomb.h"


//#undef NDEBUG
#include <assert.h>

static const AVRational pixel_aspect[17]={
 {0, 1},
 {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},
};

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#define QP(qP,depth) ( (qP)+6*((depth)-8) )

#define CHROMA_QP_TABLE_END(d) \
     QP(0,d),  QP(1,d),  QP(2,d),  QP(3,d),  QP(4,d),  QP(5,d),\
     QP(6,d),  QP(7,d),  QP(8,d),  QP(9,d), QP(10,d), QP(11,d),\
    QP(12,d), QP(13,d), QP(14,d), QP(15,d), QP(16,d), QP(17,d),\
    QP(18,d), QP(19,d), QP(20,d), QP(21,d), QP(22,d), QP(23,d),\
    QP(24,d), QP(25,d), QP(26,d), QP(27,d), QP(28,d), QP(29,d),\
    QP(29,d), QP(30,d), QP(31,d), QP(32,d), QP(32,d), QP(33,d),\
    QP(34,d), QP(34,d), QP(35,d), QP(35,d), QP(36,d), QP(36,d),\
    QP(37,d), QP(37,d), QP(37,d), QP(38,d), QP(38,d), QP(38,d),\
    QP(39,d), QP(39,d), QP(39,d), QP(39,d)

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const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM+1] = {
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    {
        CHROMA_QP_TABLE_END(8)
    },
    {
        0, 1, 2, 3, 4, 5,
        CHROMA_QP_TABLE_END(9)
    },
    {
        0, 1, 2, 3,  4,  5,
        6, 7, 8, 9, 10, 11,
        CHROMA_QP_TABLE_END(10)
    },
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    {
        0,  1, 2, 3,  4,  5,
        6,  7, 8, 9, 10, 11,
        12,13,14,15, 16, 17,
        CHROMA_QP_TABLE_END(11)
    },
    {
        0,  1, 2, 3,  4,  5,
        6,  7, 8, 9, 10, 11,
        12,13,14,15, 16, 17,
        18,19,20,21, 22, 23,
        CHROMA_QP_TABLE_END(12)
    },
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    {
        0,  1, 2, 3,  4,  5,
        6,  7, 8, 9, 10, 11,
        12,13,14,15, 16, 17,
        18,19,20,21, 22, 23,
        24,25,26,27, 28, 29,
        CHROMA_QP_TABLE_END(13)
    },
    {
        0,  1, 2, 3,  4,  5,
        6,  7, 8, 9, 10, 11,
        12,13,14,15, 16, 17,
        18,19,20,21, 22, 23,
        24,25,26,27, 28, 29,
        30,31,32,33, 34, 35,
        CHROMA_QP_TABLE_END(14)
    },
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};

static const uint8_t default_scaling4[2][16]={
{   6,13,20,28,
   13,20,28,32,
   20,28,32,37,
   28,32,37,42
},{
   10,14,20,24,
   14,20,24,27,
   20,24,27,30,
   24,27,30,34
}};

static const uint8_t default_scaling8[2][64]={
{   6,10,13,16,18,23,25,27,
   10,11,16,18,23,25,27,29,
   13,16,18,23,25,27,29,31,
   16,18,23,25,27,29,31,33,
   18,23,25,27,29,31,33,36,
   23,25,27,29,31,33,36,38,
   25,27,29,31,33,36,38,40,
   27,29,31,33,36,38,40,42
},{
    9,13,15,17,19,21,22,24,
   13,13,17,19,21,22,24,25,
   15,17,19,21,22,24,25,27,
   17,19,21,22,24,25,27,28,
   19,21,22,24,25,27,28,30,
   21,22,24,25,27,28,30,32,
   22,24,25,27,28,30,32,33,
   24,25,27,28,30,32,33,35
}};

static inline int decode_hrd_parameters(H264Context *h, SPS *sps){
    MpegEncContext * const s = &h->s;
    int cpb_count, i;
    cpb_count = get_ue_golomb_31(&s->gb) + 1;

    if(cpb_count > 32U){
        av_log(h->s.avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
        return -1;
    }

    get_bits(&s->gb, 4); /* bit_rate_scale */
    get_bits(&s->gb, 4); /* cpb_size_scale */
    for(i=0; i<cpb_count; i++){
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        get_ue_golomb_long(&s->gb); /* bit_rate_value_minus1 */
        get_ue_golomb_long(&s->gb); /* cpb_size_value_minus1 */
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        get_bits1(&s->gb);     /* cbr_flag */
    }
    sps->initial_cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
    sps->cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
    sps->dpb_output_delay_length = get_bits(&s->gb, 5) + 1;
    sps->time_offset_length = get_bits(&s->gb, 5);
    sps->cpb_cnt = cpb_count;
    return 0;
}

static inline int decode_vui_parameters(H264Context *h, SPS *sps){
    MpegEncContext * const s = &h->s;
    int aspect_ratio_info_present_flag;
    unsigned int aspect_ratio_idc;

    aspect_ratio_info_present_flag= get_bits1(&s->gb);

    if( aspect_ratio_info_present_flag ) {
        aspect_ratio_idc= get_bits(&s->gb, 8);
        if( aspect_ratio_idc == EXTENDED_SAR ) {
            sps->sar.num= get_bits(&s->gb, 16);
            sps->sar.den= get_bits(&s->gb, 16);
        }else if(aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)){
            sps->sar=  pixel_aspect[aspect_ratio_idc];
        }else{
            av_log(h->s.avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
            return -1;
        }
    }else{
        sps->sar.num=
        sps->sar.den= 0;
    }
//            s->avctx->aspect_ratio= sar_width*s->width / (float)(s->height*sar_height);

    if(get_bits1(&s->gb)){      /* overscan_info_present_flag */
        get_bits1(&s->gb);      /* overscan_appropriate_flag */
    }

    sps->video_signal_type_present_flag = get_bits1(&s->gb);
    if(sps->video_signal_type_present_flag){
        get_bits(&s->gb, 3);    /* video_format */
        sps->full_range = get_bits1(&s->gb); /* video_full_range_flag */

        sps->colour_description_present_flag = get_bits1(&s->gb);
        if(sps->colour_description_present_flag){
            sps->color_primaries = get_bits(&s->gb, 8); /* colour_primaries */
            sps->color_trc       = get_bits(&s->gb, 8); /* transfer_characteristics */
            sps->colorspace      = get_bits(&s->gb, 8); /* matrix_coefficients */
            if (sps->color_primaries >= AVCOL_PRI_NB)
                sps->color_primaries  = AVCOL_PRI_UNSPECIFIED;
            if (sps->color_trc >= AVCOL_TRC_NB)
                sps->color_trc  = AVCOL_TRC_UNSPECIFIED;
            if (sps->colorspace >= AVCOL_SPC_NB)
                sps->colorspace  = AVCOL_SPC_UNSPECIFIED;
        }
    }

    if(get_bits1(&s->gb)){      /* chroma_location_info_present_flag */
        s->avctx->chroma_sample_location = get_ue_golomb(&s->gb)+1;  /* chroma_sample_location_type_top_field */
        get_ue_golomb(&s->gb);  /* chroma_sample_location_type_bottom_field */
    }

    sps->timing_info_present_flag = get_bits1(&s->gb);
    if(sps->timing_info_present_flag){
        sps->num_units_in_tick = get_bits_long(&s->gb, 32);
        sps->time_scale = get_bits_long(&s->gb, 32);
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        if(!sps->num_units_in_tick || !sps->time_scale){
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            av_log(h->s.avctx, AV_LOG_ERROR, "time_scale/num_units_in_tick invalid or unsupported (%d/%d)\n", sps->time_scale, sps->num_units_in_tick);
            return -1;
        }
        sps->fixed_frame_rate_flag = get_bits1(&s->gb);
    }

    sps->nal_hrd_parameters_present_flag = get_bits1(&s->gb);
    if(sps->nal_hrd_parameters_present_flag)
        if(decode_hrd_parameters(h, sps) < 0)
            return -1;
    sps->vcl_hrd_parameters_present_flag = get_bits1(&s->gb);
    if(sps->vcl_hrd_parameters_present_flag)
        if(decode_hrd_parameters(h, sps) < 0)
            return -1;
    if(sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag)
        get_bits1(&s->gb);     /* low_delay_hrd_flag */
    sps->pic_struct_present_flag = get_bits1(&s->gb);
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    if(!get_bits_left(&s->gb))
        return 0;
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    sps->bitstream_restriction_flag = get_bits1(&s->gb);
    if(sps->bitstream_restriction_flag){
        get_bits1(&s->gb);     /* motion_vectors_over_pic_boundaries_flag */
        get_ue_golomb(&s->gb); /* max_bytes_per_pic_denom */
        get_ue_golomb(&s->gb); /* max_bits_per_mb_denom */
        get_ue_golomb(&s->gb); /* log2_max_mv_length_horizontal */
        get_ue_golomb(&s->gb); /* log2_max_mv_length_vertical */
        sps->num_reorder_frames= get_ue_golomb(&s->gb);
        get_ue_golomb(&s->gb); /*max_dec_frame_buffering*/

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        if (get_bits_left(&s->gb) < 0) {
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            sps->num_reorder_frames=0;
            sps->bitstream_restriction_flag= 0;
        }

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        if(sps->num_reorder_frames > 16U /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){
            av_log(h->s.avctx, AV_LOG_ERROR, "illegal num_reorder_frames %d\n", sps->num_reorder_frames);
            return -1;
        }
    }
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    if (get_bits_left(&s->gb) < 0) {
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        av_log(h->s.avctx, AV_LOG_ERROR, "Overread VUI by %d bits\n", -get_bits_left(&s->gb));
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        return AVERROR_INVALIDDATA;
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    }
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    return 0;
}

static void decode_scaling_list(H264Context *h, uint8_t *factors, int size,
                                const uint8_t *jvt_list, const uint8_t *fallback_list){
    MpegEncContext * const s = &h->s;
    int i, last = 8, next = 8;
    const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct;
    if(!get_bits1(&s->gb)) /* matrix not written, we use the predicted one */
        memcpy(factors, fallback_list, size*sizeof(uint8_t));
    else
    for(i=0;i<size;i++){
        if(next)
            next = (last + get_se_golomb(&s->gb)) & 0xff;
        if(!i && !next){ /* matrix not written, we use the preset one */
            memcpy(factors, jvt_list, size*sizeof(uint8_t));
            break;
        }
        last = factors[scan[i]] = next ? next : last;
    }
}

static void decode_scaling_matrices(H264Context *h, SPS *sps, PPS *pps, int is_sps,
                                   uint8_t (*scaling_matrix4)[16], uint8_t (*scaling_matrix8)[64]){
    MpegEncContext * const s = &h->s;
    int fallback_sps = !is_sps && sps->scaling_matrix_present;
    const uint8_t *fallback[4] = {
        fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
        fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
        fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
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        fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
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    };
    if(get_bits1(&s->gb)){
        sps->scaling_matrix_present |= is_sps;
        decode_scaling_list(h,scaling_matrix4[0],16,default_scaling4[0],fallback[0]); // Intra, Y
        decode_scaling_list(h,scaling_matrix4[1],16,default_scaling4[0],scaling_matrix4[0]); // Intra, Cr
        decode_scaling_list(h,scaling_matrix4[2],16,default_scaling4[0],scaling_matrix4[1]); // Intra, Cb
        decode_scaling_list(h,scaling_matrix4[3],16,default_scaling4[1],fallback[1]); // Inter, Y
        decode_scaling_list(h,scaling_matrix4[4],16,default_scaling4[1],scaling_matrix4[3]); // Inter, Cr
        decode_scaling_list(h,scaling_matrix4[5],16,default_scaling4[1],scaling_matrix4[4]); // Inter, Cb
        if(is_sps || pps->transform_8x8_mode){
            decode_scaling_list(h,scaling_matrix8[0],64,default_scaling8[0],fallback[2]);  // Intra, Y
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            decode_scaling_list(h,scaling_matrix8[3],64,default_scaling8[1],fallback[3]);  // Inter, Y
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            if(sps->chroma_format_idc == 3){
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                decode_scaling_list(h,scaling_matrix8[1],64,default_scaling8[0],scaling_matrix8[0]);  // Intra, Cr
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                decode_scaling_list(h,scaling_matrix8[4],64,default_scaling8[1],scaling_matrix8[3]);  // Inter, Cr
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                decode_scaling_list(h,scaling_matrix8[2],64,default_scaling8[0],scaling_matrix8[1]);  // Intra, Cb
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                decode_scaling_list(h,scaling_matrix8[5],64,default_scaling8[1],scaling_matrix8[4]);  // Inter, Cb
            }
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        }
    }
}

int ff_h264_decode_seq_parameter_set(H264Context *h){
    MpegEncContext * const s = &h->s;
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    int profile_idc, level_idc, constraint_set_flags = 0;
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    unsigned int sps_id;
    int i;
    SPS *sps;

    profile_idc= get_bits(&s->gb, 8);
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    constraint_set_flags |= get_bits1(&s->gb) << 0;   //constraint_set0_flag
    constraint_set_flags |= get_bits1(&s->gb) << 1;   //constraint_set1_flag
    constraint_set_flags |= get_bits1(&s->gb) << 2;   //constraint_set2_flag
    constraint_set_flags |= get_bits1(&s->gb) << 3;   //constraint_set3_flag
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    constraint_set_flags |= get_bits1(&s->gb) << 4;   //constraint_set4_flag
    constraint_set_flags |= get_bits1(&s->gb) << 5;   //constraint_set5_flag
    get_bits(&s->gb, 2); // reserved
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    level_idc= get_bits(&s->gb, 8);
    sps_id= get_ue_golomb_31(&s->gb);

    if(sps_id >= MAX_SPS_COUNT) {
        av_log(h->s.avctx, AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id);
        return -1;
    }
    sps= av_mallocz(sizeof(SPS));
    if(sps == NULL)
        return -1;

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    sps->time_offset_length = 24;
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    sps->profile_idc= profile_idc;
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    sps->constraint_set_flags = constraint_set_flags;
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    sps->level_idc= level_idc;
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    sps->full_range = -1;
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    memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
    memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
    sps->scaling_matrix_present = 0;
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    sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
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    if(sps->profile_idc == 100 || sps->profile_idc == 110 ||
       sps->profile_idc == 122 || sps->profile_idc == 244 || sps->profile_idc ==  44 ||
       sps->profile_idc ==  83 || sps->profile_idc ==  86 || sps->profile_idc == 118 ||
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       sps->profile_idc == 128 || sps->profile_idc == 144) {
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        sps->chroma_format_idc= get_ue_golomb_31(&s->gb);
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        if (sps->chroma_format_idc > 3U) {
            av_log(h->s.avctx, AV_LOG_ERROR, "chroma_format_idc %d is illegal\n", sps->chroma_format_idc);
            goto fail;
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        } else if(sps->chroma_format_idc == 3) {
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            sps->residual_color_transform_flag = get_bits1(&s->gb);
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            if(sps->residual_color_transform_flag) {
                av_log(h->s.avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
                goto fail;
            }
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        }
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        sps->bit_depth_luma   = get_ue_golomb(&s->gb) + 8;
        sps->bit_depth_chroma = get_ue_golomb(&s->gb) + 8;
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        if (sps->bit_depth_luma > 14U || sps->bit_depth_chroma > 14U) {
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            av_log(h->s.avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
                   sps->bit_depth_luma, sps->bit_depth_chroma);
            goto fail;
        }
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        sps->transform_bypass = get_bits1(&s->gb);
        decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8);
    }else{
        sps->chroma_format_idc= 1;
        sps->bit_depth_luma   = 8;
        sps->bit_depth_chroma = 8;
    }

    sps->log2_max_frame_num= get_ue_golomb(&s->gb) + 4;
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    if (sps->log2_max_frame_num < 4 || sps->log2_max_frame_num > 16) {
        av_log(h->s.avctx, AV_LOG_ERROR, "illegal log2_max_frame_num %d\n",
               sps->log2_max_frame_num);
        goto fail;
    }

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    sps->poc_type= get_ue_golomb_31(&s->gb);

    if(sps->poc_type == 0){ //FIXME #define
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        unsigned t = get_ue_golomb(&s->gb);
        if(t>12){
            av_log(h->s.avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
            goto fail;
        }
        sps->log2_max_poc_lsb= t + 4;
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    } else if(sps->poc_type == 1){//FIXME #define
        sps->delta_pic_order_always_zero_flag= get_bits1(&s->gb);
        sps->offset_for_non_ref_pic= get_se_golomb(&s->gb);
        sps->offset_for_top_to_bottom_field= get_se_golomb(&s->gb);
        sps->poc_cycle_length                = get_ue_golomb(&s->gb);

        if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){
            av_log(h->s.avctx, AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
            goto fail;
        }

        for(i=0; i<sps->poc_cycle_length; i++)
            sps->offset_for_ref_frame[i]= get_se_golomb(&s->gb);
    }else if(sps->poc_type != 2){
        av_log(h->s.avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
        goto fail;
    }

    sps->ref_frame_count= get_ue_golomb_31(&s->gb);
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    if (h->s.avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
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        sps->ref_frame_count= FFMAX(2, sps->ref_frame_count);
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    if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count > 16U){
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        av_log(h->s.avctx, AV_LOG_ERROR, "too many reference frames\n");
        goto fail;
    }
    sps->gaps_in_frame_num_allowed_flag= get_bits1(&s->gb);
    sps->mb_width = get_ue_golomb(&s->gb) + 1;
    sps->mb_height= get_ue_golomb(&s->gb) + 1;
    if((unsigned)sps->mb_width >= INT_MAX/16 || (unsigned)sps->mb_height >= INT_MAX/16 ||
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       av_image_check_size(16*sps->mb_width, 16*sps->mb_height, 0, h->s.avctx)){
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        av_log(h->s.avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
        goto fail;
    }

    sps->frame_mbs_only_flag= get_bits1(&s->gb);
    if(!sps->frame_mbs_only_flag)
        sps->mb_aff= get_bits1(&s->gb);
    else
        sps->mb_aff= 0;

    sps->direct_8x8_inference_flag= get_bits1(&s->gb);

#ifndef ALLOW_INTERLACE
    if(sps->mb_aff)
        av_log(h->s.avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n");
#endif
    sps->crop= get_bits1(&s->gb);
    if(sps->crop){
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        int crop_vertical_limit   = sps->chroma_format_idc  & 2 ? 16 : 8;
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        int crop_horizontal_limit = sps->chroma_format_idc == 3 ? 16 : 8;
463 464 465 466 467
        sps->crop_left  = get_ue_golomb(&s->gb);
        sps->crop_right = get_ue_golomb(&s->gb);
        sps->crop_top   = get_ue_golomb(&s->gb);
        sps->crop_bottom= get_ue_golomb(&s->gb);
        if(sps->crop_left || sps->crop_top){
468
            av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ... (left: %d, top: %d)\n", sps->crop_left, sps->crop_top);
469
        }
470
        if(sps->crop_right >= crop_horizontal_limit || sps->crop_bottom >= crop_vertical_limit){
471 472 473 474 475 476 477 478
            av_log(h->s.avctx, AV_LOG_ERROR, "brainfart cropping not supported, cropping disabled (right: %d, bottom: %d)\n", sps->crop_right, sps->crop_bottom);
        /* It is very unlikely that partial cropping will make anybody happy.
         * Not cropping at all fixes for example playback of Sisvel 3D streams
         * in applications supporting Sisvel 3D. */
        sps->crop_left  =
        sps->crop_right =
        sps->crop_top   =
        sps->crop_bottom= 0;
479 480 481 482 483 484 485 486 487 488 489 490 491
        }
    }else{
        sps->crop_left  =
        sps->crop_right =
        sps->crop_top   =
        sps->crop_bottom= 0;
    }

    sps->vui_parameters_present_flag= get_bits1(&s->gb);
    if( sps->vui_parameters_present_flag )
        if (decode_vui_parameters(h, sps) < 0)
            goto fail;

492 493 494
    if(!sps->sar.den)
        sps->sar.den= 1;

495
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
496
        static const char csp[4][5] = { "Gray", "420", "422", "444" };
497
        av_log(h->s.avctx, AV_LOG_DEBUG, "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%d/%d/%d/%d %s %s %d/%d b%d reo:%d\n",
498 499 500 501 502 503 504 505 506
               sps_id, sps->profile_idc, sps->level_idc,
               sps->poc_type,
               sps->ref_frame_count,
               sps->mb_width, sps->mb_height,
               sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
               sps->direct_8x8_inference_flag ? "8B8" : "",
               sps->crop_left, sps->crop_right,
               sps->crop_top, sps->crop_bottom,
               sps->vui_parameters_present_flag ? "VUI" : "",
507
               csp[sps->chroma_format_idc],
508
               sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
509
               sps->timing_info_present_flag ? sps->time_scale : 0,
510 511
               sps->bit_depth_luma,
               h->sps.bitstream_restriction_flag ? sps->num_reorder_frames : -1
512 513 514 515 516 517 518 519 520 521 522 523 524
               );
    }

    av_free(h->sps_buffers[sps_id]);
    h->sps_buffers[sps_id]= sps;
    h->sps = *sps;
    return 0;
fail:
    av_free(sps);
    return -1;
}

static void
525
build_qp_table(PPS *pps, int t, int index, const int depth)
526 527
{
    int i;
528 529 530
    const int max_qp = 51 + 6*(depth-8);
    for(i = 0; i < max_qp+1; i++)
        pps->chroma_qp_table[t][i] = ff_h264_chroma_qp[depth-8][av_clip(i + index, 0, max_qp)];
531 532
}

533 534 535
static int more_rbsp_data_in_pps(H264Context *h, PPS *pps)
{
    const SPS *sps = h->sps_buffers[pps->sps_id];
536 537 538 539
    int profile_idc = sps->profile_idc;

    if ((profile_idc == 66 || profile_idc == 77 ||
         profile_idc == 88) && (sps->constraint_set_flags & 7)) {
540
        av_log(h->s.avctx, AV_LOG_VERBOSE,
541 542 543 544 545 546 547
               "Current profile doesn't provide more RBSP data in PPS, skipping\n");
        return 0;
    }

    return 1;
}

548 549 550 551
int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length){
    MpegEncContext * const s = &h->s;
    unsigned int pps_id= get_ue_golomb(&s->gb);
    PPS *pps;
552
    const int qp_bd_offset = 6*(h->sps.bit_depth_luma-8);
553
    int bits_left;
554 555 556 557

    if(pps_id >= MAX_PPS_COUNT) {
        av_log(h->s.avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
        return -1;
558 559 560 561 562
    } else if (h->sps.bit_depth_luma > 14) {
        av_log(h->s.avctx, AV_LOG_ERROR, "Invalid luma bit depth=%d\n", h->sps.bit_depth_luma);
        return AVERROR_INVALIDDATA;
    } else if (h->sps.bit_depth_luma == 11 || h->sps.bit_depth_luma == 13) {
        av_log(h->s.avctx, AV_LOG_ERROR, "Unimplemented luma bit depth=%d\n", h->sps.bit_depth_luma);
563
        return AVERROR_PATCHWELCOME;
564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623
    }

    pps= av_mallocz(sizeof(PPS));
    if(pps == NULL)
        return -1;
    pps->sps_id= get_ue_golomb_31(&s->gb);
    if((unsigned)pps->sps_id>=MAX_SPS_COUNT || h->sps_buffers[pps->sps_id] == NULL){
        av_log(h->s.avctx, AV_LOG_ERROR, "sps_id out of range\n");
        goto fail;
    }

    pps->cabac= get_bits1(&s->gb);
    pps->pic_order_present= get_bits1(&s->gb);
    pps->slice_group_count= get_ue_golomb(&s->gb) + 1;
    if(pps->slice_group_count > 1 ){
        pps->mb_slice_group_map_type= get_ue_golomb(&s->gb);
        av_log(h->s.avctx, AV_LOG_ERROR, "FMO not supported\n");
        switch(pps->mb_slice_group_map_type){
        case 0:
#if 0
|   for( i = 0; i <= num_slice_groups_minus1; i++ ) |   |        |
|    run_length[ i ]                                |1  |ue(v)   |
#endif
            break;
        case 2:
#if 0
|   for( i = 0; i < num_slice_groups_minus1; i++ )  |   |        |
|{                                                  |   |        |
|    top_left_mb[ i ]                               |1  |ue(v)   |
|    bottom_right_mb[ i ]                           |1  |ue(v)   |
|   }                                               |   |        |
#endif
            break;
        case 3:
        case 4:
        case 5:
#if 0
|   slice_group_change_direction_flag               |1  |u(1)    |
|   slice_group_change_rate_minus1                  |1  |ue(v)   |
#endif
            break;
        case 6:
#if 0
|   slice_group_id_cnt_minus1                       |1  |ue(v)   |
|   for( i = 0; i <= slice_group_id_cnt_minus1; i++ |   |        |
|)                                                  |   |        |
|    slice_group_id[ i ]                            |1  |u(v)    |
#endif
            break;
        }
    }
    pps->ref_count[0]= get_ue_golomb(&s->gb) + 1;
    pps->ref_count[1]= get_ue_golomb(&s->gb) + 1;
    if(pps->ref_count[0]-1 > 32-1 || pps->ref_count[1]-1 > 32-1){
        av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
        goto fail;
    }

    pps->weighted_pred= get_bits1(&s->gb);
    pps->weighted_bipred_idc= get_bits(&s->gb, 2);
624 625
    pps->init_qp= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
    pps->init_qs= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
626 627 628 629 630 631 632 633 634 635
    pps->chroma_qp_index_offset[0]= get_se_golomb(&s->gb);
    pps->deblocking_filter_parameters_present= get_bits1(&s->gb);
    pps->constrained_intra_pred= get_bits1(&s->gb);
    pps->redundant_pic_cnt_present = get_bits1(&s->gb);

    pps->transform_8x8_mode= 0;
    h->dequant_coeff_pps= -1; //contents of sps/pps can change even if id doesn't, so reinit
    memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
    memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));

636
    bits_left = bit_length - get_bits_count(&s->gb);
637
    if(bits_left > 0 && more_rbsp_data_in_pps(h, pps)){
638 639 640 641 642 643 644
        pps->transform_8x8_mode= get_bits1(&s->gb);
        decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8);
        pps->chroma_qp_index_offset[1]= get_se_golomb(&s->gb); //second_chroma_qp_index_offset
    } else {
        pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0];
    }

645 646
    build_qp_table(pps, 0, pps->chroma_qp_index_offset[0], h->sps.bit_depth_luma);
    build_qp_table(pps, 1, pps->chroma_qp_index_offset[1], h->sps.bit_depth_luma);
647
    if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
648
        pps->chroma_qp_diff= 1;
649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671

    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
        av_log(h->s.avctx, AV_LOG_DEBUG, "pps:%u sps:%u %s slice_groups:%d ref:%d/%d %s qp:%d/%d/%d/%d %s %s %s %s\n",
               pps_id, pps->sps_id,
               pps->cabac ? "CABAC" : "CAVLC",
               pps->slice_group_count,
               pps->ref_count[0], pps->ref_count[1],
               pps->weighted_pred ? "weighted" : "",
               pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
               pps->deblocking_filter_parameters_present ? "LPAR" : "",
               pps->constrained_intra_pred ? "CONSTR" : "",
               pps->redundant_pic_cnt_present ? "REDU" : "",
               pps->transform_8x8_mode ? "8x8DCT" : ""
               );
    }

    av_free(h->pps_buffers[pps_id]);
    h->pps_buffers[pps_id]= pps;
    return 0;
fail:
    av_free(pps);
    return -1;
}