/* * H.26L/H.264/AVC/JVT/14496-10/... parameter set decoding * Copyright (c) 2003 Michael Niedermayer * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * H.264 / AVC / MPEG-4 part10 parameter set decoding. * @author Michael Niedermayer */ #include #include "libavutil/imgutils.h" #include "internal.h" #include "mathops.h" #include "avcodec.h" #include "h264data.h" #include "h264_ps.h" #include "golomb.h" #define MAX_LOG2_MAX_FRAME_NUM (12 + 4) #define MIN_LOG2_MAX_FRAME_NUM 4 #define EXTENDED_SAR 255 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 }, }; 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 } }; /* maximum number of MBs in the DPB for a given level */ static const int level_max_dpb_mbs[][2] = { { 10, 396 }, { 11, 900 }, { 12, 2376 }, { 13, 2376 }, { 20, 2376 }, { 21, 4752 }, { 22, 8100 }, { 30, 8100 }, { 31, 18000 }, { 32, 20480 }, { 40, 32768 }, { 41, 32768 }, { 42, 34816 }, { 50, 110400 }, { 51, 184320 }, { 52, 184320 }, }; static void remove_pps(H264ParamSets *s, int id) { if (s->pps_list[id] && s->pps == (const PPS*)s->pps_list[id]->data) s->pps = NULL; av_buffer_unref(&s->pps_list[id]); } static void remove_sps(H264ParamSets *s, int id) { int i; if (s->sps_list[id]) { if (s->sps == (SPS*)s->sps_list[id]->data) s->sps = NULL; /* drop all PPS that depend on this SPS */ for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++) if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id) remove_pps(s, i); } av_buffer_unref(&s->sps_list[id]); } static inline int decode_hrd_parameters(GetBitContext *gb, AVCodecContext *avctx, SPS *sps) { int cpb_count, i; cpb_count = get_ue_golomb_31(gb) + 1; if (cpb_count > 32U) { av_log(avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count); return AVERROR_INVALIDDATA; } get_bits(gb, 4); /* bit_rate_scale */ get_bits(gb, 4); /* cpb_size_scale */ for (i = 0; i < cpb_count; i++) { get_ue_golomb_long(gb); /* bit_rate_value_minus1 */ get_ue_golomb_long(gb); /* cpb_size_value_minus1 */ get_bits1(gb); /* cbr_flag */ } sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1; sps->cpb_removal_delay_length = get_bits(gb, 5) + 1; sps->dpb_output_delay_length = get_bits(gb, 5) + 1; sps->time_offset_length = get_bits(gb, 5); sps->cpb_cnt = cpb_count; return 0; } static inline int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx, SPS *sps) { int aspect_ratio_info_present_flag; unsigned int aspect_ratio_idc; aspect_ratio_info_present_flag = get_bits1(gb); if (aspect_ratio_info_present_flag) { aspect_ratio_idc = get_bits(gb, 8); if (aspect_ratio_idc == EXTENDED_SAR) { sps->sar.num = get_bits(gb, 16); sps->sar.den = get_bits(gb, 16); } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)) { sps->sar = pixel_aspect[aspect_ratio_idc]; } else { av_log(avctx, AV_LOG_ERROR, "illegal aspect ratio\n"); return AVERROR_INVALIDDATA; } } else { sps->sar.num = sps->sar.den = 0; } if (get_bits1(gb)) /* overscan_info_present_flag */ get_bits1(gb); /* overscan_appropriate_flag */ sps->video_signal_type_present_flag = get_bits1(gb); if (sps->video_signal_type_present_flag) { get_bits(gb, 3); /* video_format */ sps->full_range = get_bits1(gb); /* video_full_range_flag */ sps->colour_description_present_flag = get_bits1(gb); if (sps->colour_description_present_flag) { sps->color_primaries = get_bits(gb, 8); /* colour_primaries */ sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */ sps->colorspace = get_bits(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; } } /* chroma_location_info_present_flag */ if (get_bits1(gb)) { /* chroma_sample_location_type_top_field */ avctx->chroma_sample_location = get_ue_golomb(gb) + 1; get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */ } sps->timing_info_present_flag = get_bits1(gb); if (sps->timing_info_present_flag) { sps->num_units_in_tick = get_bits_long(gb, 32); sps->time_scale = get_bits_long(gb, 32); if (!sps->num_units_in_tick || !sps->time_scale) { av_log(avctx, AV_LOG_ERROR, "time_scale/num_units_in_tick invalid or unsupported (%"PRIu32"/%"PRIu32")\n", sps->time_scale, sps->num_units_in_tick); return AVERROR_INVALIDDATA; } sps->fixed_frame_rate_flag = get_bits1(gb); } sps->nal_hrd_parameters_present_flag = get_bits1(gb); if (sps->nal_hrd_parameters_present_flag) if (decode_hrd_parameters(gb, avctx, sps) < 0) return AVERROR_INVALIDDATA; sps->vcl_hrd_parameters_present_flag = get_bits1(gb); if (sps->vcl_hrd_parameters_present_flag) if (decode_hrd_parameters(gb, avctx, sps) < 0) return AVERROR_INVALIDDATA; if (sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag) get_bits1(gb); /* low_delay_hrd_flag */ sps->pic_struct_present_flag = get_bits1(gb); sps->bitstream_restriction_flag = get_bits1(gb); if (sps->bitstream_restriction_flag) { get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */ get_ue_golomb(gb); /* max_bytes_per_pic_denom */ get_ue_golomb(gb); /* max_bits_per_mb_denom */ get_ue_golomb(gb); /* log2_max_mv_length_horizontal */ get_ue_golomb(gb); /* log2_max_mv_length_vertical */ sps->num_reorder_frames = get_ue_golomb(gb); get_ue_golomb(gb); /*max_dec_frame_buffering*/ if (get_bits_left(gb) < 0) { sps->num_reorder_frames = 0; sps->bitstream_restriction_flag = 0; } if (sps->num_reorder_frames > 16U /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) { av_log(avctx, AV_LOG_ERROR, "Clipping illegal num_reorder_frames %d\n", sps->num_reorder_frames); sps->num_reorder_frames = 16; return AVERROR_INVALIDDATA; } } if (get_bits_left(gb) < 0) { av_log(avctx, AV_LOG_ERROR, "Overread VUI by %d bits\n", -get_bits_left(gb)); return AVERROR_INVALIDDATA; } return 0; } static void decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size, const uint8_t *jvt_list, const uint8_t *fallback_list) { int i, last = 8, next = 8; const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct; if (!get_bits1(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(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(GetBitContext *gb, SPS *sps, PPS *pps, int is_sps, uint8_t(*scaling_matrix4)[16], uint8_t(*scaling_matrix8)[64]) { 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], fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1] }; if (get_bits1(gb)) { sps->scaling_matrix_present |= is_sps; decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb if (is_sps || pps->transform_8x8_mode) { decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y if (sps->chroma_format_idc == 3) { decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb } decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y if (sps->chroma_format_idc == 3) { decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb } } } } int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps) { AVBufferRef *sps_buf; int profile_idc, level_idc, constraint_set_flags = 0; unsigned int sps_id; int i, log2_max_frame_num_minus4; SPS *sps; profile_idc = get_bits(gb, 8); constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag skip_bits(gb, 2); // reserved_zero_2bits level_idc = get_bits(gb, 8); sps_id = get_ue_golomb_31(gb); if (sps_id >= MAX_SPS_COUNT) { av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id); return AVERROR_INVALIDDATA; } sps_buf = av_buffer_allocz(sizeof(*sps)); if (!sps_buf) return AVERROR(ENOMEM); sps = (SPS*)sps_buf->data; sps->sps_id = sps_id; sps->time_offset_length = 24; sps->profile_idc = profile_idc; sps->constraint_set_flags = constraint_set_flags; sps->level_idc = level_idc; memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4)); memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8)); sps->scaling_matrix_present = 0; if (sps->profile_idc == 100 || // High profile sps->profile_idc == 110 || // High10 profile sps->profile_idc == 122 || // High422 profile sps->profile_idc == 244 || // High444 Predictive profile sps->profile_idc == 44 || // Cavlc444 profile sps->profile_idc == 83 || // Scalable Constrained High profile (SVC) sps->profile_idc == 86 || // Scalable High Intra profile (SVC) sps->profile_idc == 118 || // Stereo High profile (MVC) sps->profile_idc == 128 || // Multiview High profile (MVC) sps->profile_idc == 138 || // Multiview Depth High profile (MVCD) sps->profile_idc == 144) { // old High444 profile sps->chroma_format_idc = get_ue_golomb_31(gb); if (sps->chroma_format_idc > 3) { avpriv_request_sample(avctx, "chroma_format_idc %u", sps->chroma_format_idc); goto fail; } else if (sps->chroma_format_idc == 3) { sps->residual_color_transform_flag = get_bits1(gb); } sps->bit_depth_luma = get_ue_golomb(gb) + 8; sps->bit_depth_chroma = get_ue_golomb(gb) + 8; if (sps->bit_depth_chroma != sps->bit_depth_luma) { avpriv_request_sample(avctx, "Different chroma and luma bit depth"); goto fail; } sps->transform_bypass = get_bits1(gb); decode_scaling_matrices(gb, 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; } log2_max_frame_num_minus4 = get_ue_golomb(gb); if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 || log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) { av_log(avctx, AV_LOG_ERROR, "log2_max_frame_num_minus4 out of range (0-12): %d\n", log2_max_frame_num_minus4); goto fail; } sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4; sps->poc_type = get_ue_golomb_31(gb); if (sps->poc_type == 0) { // FIXME #define sps->log2_max_poc_lsb = get_ue_golomb(gb) + 4; } else if (sps->poc_type == 1) { // FIXME #define sps->delta_pic_order_always_zero_flag = get_bits1(gb); sps->offset_for_non_ref_pic = get_se_golomb(gb); sps->offset_for_top_to_bottom_field = get_se_golomb(gb); sps->poc_cycle_length = get_ue_golomb(gb); if ((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) { av_log(avctx, AV_LOG_ERROR, "poc_cycle_length overflow %d\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(gb); } else if (sps->poc_type != 2) { av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type); goto fail; } sps->ref_frame_count = get_ue_golomb_31(gb); if (sps->ref_frame_count > MAX_DELAYED_PIC_COUNT) { av_log(avctx, AV_LOG_ERROR, "too many reference frames %d\n", sps->ref_frame_count); goto fail; } sps->gaps_in_frame_num_allowed_flag = get_bits1(gb); sps->mb_width = get_ue_golomb(gb) + 1; sps->mb_height = get_ue_golomb(gb) + 1; sps->frame_mbs_only_flag = get_bits1(gb); if (sps->mb_height >= INT_MAX / 2) { av_log(avctx, AV_LOG_ERROR, "height overflow\n"); goto fail; } sps->mb_height *= 2 - sps->frame_mbs_only_flag; if ((unsigned)sps->mb_width >= INT_MAX / 16 || (unsigned)sps->mb_height >= INT_MAX / 16 || av_image_check_size(16 * sps->mb_width, 16 * sps->mb_height, 0, avctx)) { av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n"); goto fail; } if (!sps->frame_mbs_only_flag) sps->mb_aff = get_bits1(gb); else sps->mb_aff = 0; sps->direct_8x8_inference_flag = get_bits1(gb); if (!sps->frame_mbs_only_flag && !sps->direct_8x8_inference_flag) { av_log(avctx, AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n"); goto fail; } #ifndef ALLOW_INTERLACE if (sps->mb_aff) av_log(avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n"); #endif sps->crop = get_bits1(gb); if (sps->crop) { unsigned int crop_left = get_ue_golomb(gb); unsigned int crop_right = get_ue_golomb(gb); unsigned int crop_top = get_ue_golomb(gb); unsigned int crop_bottom = get_ue_golomb(gb); if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) { av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original " "values are l:%d r:%d t:%d b:%d\n", crop_left, crop_right, crop_top, crop_bottom); sps->crop_left = sps->crop_right = sps->crop_top = sps->crop_bottom = 0; } else { int vsub = (sps->chroma_format_idc == 1) ? 1 : 0; int hsub = (sps->chroma_format_idc == 1 || sps->chroma_format_idc == 2) ? 1 : 0; int step_x = 1 << hsub; int step_y = (2 - sps->frame_mbs_only_flag) << vsub; if (crop_left & (0x1F >> (sps->bit_depth_luma > 8)) && !(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) { crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8)); av_log(avctx, AV_LOG_WARNING, "Reducing left cropping to %d " "chroma samples to preserve alignment.\n", crop_left); } if (INT_MAX / step_x <= crop_left || INT_MAX / step_x - crop_left <= crop_right || 16 * sps->mb_width <= step_x * (crop_left + crop_right) || INT_MAX / step_y <= crop_top || INT_MAX / step_y - crop_top <= crop_bottom || 16 * sps->mb_height <= step_y * (crop_top + crop_bottom)) { av_log(avctx, AV_LOG_WARNING, "Invalid crop parameters\n"); if (avctx->err_recognition & AV_EF_EXPLODE) goto fail; crop_left = crop_right = crop_top = crop_bottom = 0; } sps->crop_left = crop_left * step_x; sps->crop_right = crop_right * step_x; sps->crop_top = crop_top * step_y; sps->crop_bottom = crop_bottom * step_y; } } else { sps->crop_left = sps->crop_right = sps->crop_top = sps->crop_bottom = sps->crop = 0; } sps->vui_parameters_present_flag = get_bits1(gb); if (sps->vui_parameters_present_flag) { int ret = decode_vui_parameters(gb, avctx, sps); if (ret < 0 && avctx->err_recognition & AV_EF_EXPLODE) goto fail; } /* if the maximum delay is not stored in the SPS, derive it based on the * level */ if (!sps->bitstream_restriction_flag && (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) { sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1; for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) { if (level_max_dpb_mbs[i][0] == sps->level_idc) { sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height), sps->num_reorder_frames); break; } } } if (!sps->sar.den) sps->sar.den = 1; if (avctx->debug & FF_DEBUG_PICT_INFO) { static const char csp[4][5] = { "Gray", "420", "422", "444" }; av_log(avctx, AV_LOG_DEBUG, "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%u/%u/%u/%u %s %s %"PRId32"/%"PRId32"\n", 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" : "", csp[sps->chroma_format_idc], sps->timing_info_present_flag ? sps->num_units_in_tick : 0, sps->timing_info_present_flag ? sps->time_scale : 0); } /* check if this is a repeat of an already parsed SPS, then keep the * original one. * otherwise drop all PPSes that depend on it */ if (ps->sps_list[sps_id] && !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) { av_buffer_unref(&sps_buf); } else { remove_sps(ps, sps_id); ps->sps_list[sps_id] = sps_buf; } return 0; fail: av_buffer_unref(&sps_buf); return AVERROR_INVALIDDATA; } static void init_dequant8_coeff_table(PPS *pps, const SPS *sps) { int i, j, q, x; const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8); for (i = 0; i < 6; i++) { pps->dequant8_coeff[i] = pps->dequant8_buffer[i]; for (j = 0; j < i; j++) if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i], 64 * sizeof(uint8_t))) { pps->dequant8_coeff[i] = pps->dequant8_buffer[j]; break; } if (j < i) continue; for (q = 0; q < max_qp + 1; q++) { int shift = ff_h264_quant_div6[q]; int idx = ff_h264_quant_rem6[q]; for (x = 0; x < 64; x++) pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] = ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] * pps->scaling_matrix8[i][x]) << shift; } } } static void init_dequant4_coeff_table(PPS *pps, const SPS *sps) { int i, j, q, x; const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8); for (i = 0; i < 6; i++) { pps->dequant4_coeff[i] = pps->dequant4_buffer[i]; for (j = 0; j < i; j++) if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i], 16 * sizeof(uint8_t))) { pps->dequant4_coeff[i] = pps->dequant4_buffer[j]; break; } if (j < i) continue; for (q = 0; q < max_qp + 1; q++) { int shift = ff_h264_quant_div6[q] + 2; int idx = ff_h264_quant_rem6[q]; for (x = 0; x < 16; x++) pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] = ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] * pps->scaling_matrix4[i][x]) << shift; } } } static void init_dequant_tables(PPS *pps, const SPS *sps) { int i, x; init_dequant4_coeff_table(pps, sps); if (pps->transform_8x8_mode) init_dequant8_coeff_table(pps, sps); if (sps->transform_bypass) { for (i = 0; i < 6; i++) for (x = 0; x < 16; x++) pps->dequant4_coeff[i][0][x] = 1 << 6; if (pps->transform_8x8_mode) for (i = 0; i < 6; i++) for (x = 0; x < 64; x++) pps->dequant8_coeff[i][0][x] = 1 << 6; } } static void build_qp_table(PPS *pps, int t, int index, const int depth) { int i; 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)]; } int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length) { AVBufferRef *pps_buf; SPS *sps; unsigned int pps_id = get_ue_golomb(gb); PPS *pps; int qp_bd_offset; int bits_left; int ret; if (pps_id >= MAX_PPS_COUNT) { av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id); return AVERROR_INVALIDDATA; } pps_buf = av_buffer_allocz(sizeof(*pps)); if (!pps_buf) return AVERROR(ENOMEM); pps = (PPS*)pps_buf->data; pps->sps_id = get_ue_golomb_31(gb); if ((unsigned)pps->sps_id >= MAX_SPS_COUNT || !ps->sps_list[pps->sps_id]) { av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id); ret = AVERROR_INVALIDDATA; goto fail; } sps = (SPS*)ps->sps_list[pps->sps_id]->data; if (sps->bit_depth_luma > 10) { av_log(avctx, AV_LOG_ERROR, "Unimplemented luma bit depth=%d (max=10)\n", sps->bit_depth_luma); ret = AVERROR_PATCHWELCOME; goto fail; } pps->cabac = get_bits1(gb); pps->pic_order_present = get_bits1(gb); pps->slice_group_count = get_ue_golomb(gb) + 1; if (pps->slice_group_count > 1) { pps->mb_slice_group_map_type = get_ue_golomb(gb); av_log(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(gb) + 1; pps->ref_count[1] = get_ue_golomb(gb) + 1; if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) { av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n"); ret = AVERROR_INVALIDDATA; goto fail; } qp_bd_offset = 6 * (sps->bit_depth_luma - 8); pps->weighted_pred = get_bits1(gb); pps->weighted_bipred_idc = get_bits(gb, 2); pps->init_qp = get_se_golomb(gb) + 26 + qp_bd_offset; pps->init_qs = get_se_golomb(gb) + 26 + qp_bd_offset; pps->chroma_qp_index_offset[0] = get_se_golomb(gb); pps->deblocking_filter_parameters_present = get_bits1(gb); pps->constrained_intra_pred = get_bits1(gb); pps->redundant_pic_cnt_present = get_bits1(gb); pps->transform_8x8_mode = 0; memcpy(pps->scaling_matrix4, sps->scaling_matrix4, sizeof(pps->scaling_matrix4)); memcpy(pps->scaling_matrix8, sps->scaling_matrix8, sizeof(pps->scaling_matrix8)); bits_left = bit_length - get_bits_count(gb); if (bits_left && (bits_left > 8 || show_bits(gb, bits_left) != 1 << (bits_left - 1))) { pps->transform_8x8_mode = get_bits1(gb); decode_scaling_matrices(gb, sps, pps, 0, pps->scaling_matrix4, pps->scaling_matrix8); // second_chroma_qp_index_offset pps->chroma_qp_index_offset[1] = get_se_golomb(gb); } else { pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0]; } build_qp_table(pps, 0, pps->chroma_qp_index_offset[0], sps->bit_depth_luma); build_qp_table(pps, 1, pps->chroma_qp_index_offset[1], sps->bit_depth_luma); init_dequant_tables(pps, sps); if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1]) pps->chroma_qp_diff = 1; if (avctx->debug & FF_DEBUG_PICT_INFO) { av_log(avctx, AV_LOG_DEBUG, "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %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" : ""); } remove_pps(ps, pps_id); ps->pps_list[pps_id] = pps_buf; return 0; fail: av_buffer_unref(&pps_buf); return ret; }