| /* | |
| * 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 | |
| */ | |
| /** | |
| * @file | |
| * H.264 / AVC / MPEG-4 part10 parameter set decoding. | |
| * @author Michael Niedermayer <michaelni@gmx.at> | |
| */ | |
| #include <inttypes.h> | |
| #include "libavutil/imgutils.h" | |
| #include "mathops.h" | |
| #include "avcodec.h" | |
| #include "h264data.h" | |
| #include "h2645_vui.h" | |
| #include "h264_ps.h" | |
| #include "golomb.h" | |
| #include "refstruct.h" | |
| #define MIN_LOG2_MAX_FRAME_NUM 4 | |
| 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) | |
| { | |
| ff_refstruct_unref(&s->pps_list[id]); | |
| } | |
| static void remove_sps(H264ParamSets *s, int id) | |
| { | |
| #if 0 | |
| int i; | |
| if (s->sps_list[id]) { | |
| /* drop all PPS that depend on this SPS */ | |
| for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++) | |
| if (s->pps_list[i] && s->pps_list[i]->sps_id == id) | |
| remove_pps(s, i); | |
| } | |
| #endif | |
| ff_refstruct_unref(&s->sps_list[id]); | |
| } | |
| static inline int decode_hrd_parameters(GetBitContext *gb, void *logctx, | |
| SPS *sps) | |
| { | |
| int cpb_count, i; | |
| cpb_count = get_ue_golomb_31(gb) + 1; | |
| if (cpb_count > 32U) { | |
| av_log(logctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| sps->cpr_flag = 0x0; | |
| sps->bit_rate_scale = get_bits(gb, 4); | |
| get_bits(gb, 4); /* cpb_size_scale */ | |
| for (i = 0; i < cpb_count; i++) { | |
| sps->bit_rate_value[i] = get_ue_golomb_long(gb) + 1; /* bit_rate_value_minus1 + 1 */ | |
| sps->cpb_size_value[i] = get_ue_golomb_long(gb) + 1; /* cpb_size_value_minus1 + 1 */ | |
| sps->cpr_flag |= get_bits1(gb) << i; | |
| } | |
| 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, void *logctx, | |
| SPS *sps) | |
| { | |
| ff_h2645_decode_common_vui_params(gb, &sps->vui, logctx); | |
| if (show_bits1(gb) && get_bits_left(gb) < 10) { | |
| av_log(logctx, AV_LOG_WARNING, "Truncated VUI (%d)\n", get_bits_left(gb)); | |
| return 0; | |
| } | |
| sps->timing_info_present_flag = get_bits1(gb); | |
| if (sps->timing_info_present_flag) { | |
| unsigned num_units_in_tick = get_bits_long(gb, 32); | |
| unsigned time_scale = get_bits_long(gb, 32); | |
| if (!num_units_in_tick || !time_scale) { | |
| av_log(logctx, AV_LOG_ERROR, | |
| "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n", | |
| time_scale, num_units_in_tick); | |
| sps->timing_info_present_flag = 0; | |
| } else { | |
| sps->num_units_in_tick = num_units_in_tick; | |
| sps->time_scale = time_scale; | |
| } | |
| 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, logctx, 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, logctx, 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); | |
| if (!get_bits_left(gb)) | |
| return 0; | |
| sps->bitstream_restriction_flag = get_bits1(gb); | |
| if (sps->bitstream_restriction_flag) { | |
| get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */ | |
| get_ue_golomb_31(gb); /* max_bytes_per_pic_denom */ | |
| get_ue_golomb_31(gb); /* max_bits_per_mb_denom */ | |
| get_ue_golomb_31(gb); /* log2_max_mv_length_horizontal */ | |
| get_ue_golomb_31(gb); /* log2_max_mv_length_vertical */ | |
| sps->num_reorder_frames = get_ue_golomb_31(gb); | |
| sps->max_dec_frame_buffering = get_ue_golomb_31(gb); | |
| 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(logctx, AV_LOG_ERROR, | |
| "Clipping illegal num_reorder_frames %d\n", | |
| sps->num_reorder_frames); | |
| sps->num_reorder_frames = 16; | |
| return AVERROR_INVALIDDATA; | |
| } | |
| } | |
| return 0; | |
| } | |
| static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size, | |
| const uint8_t *jvt_list, const uint8_t *fallback_list, | |
| uint16_t *mask, int pos) | |
| { | |
| int i, last = 8, next = 8; | |
| const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct; | |
| uint16_t seq_scaling_list_present_flag = get_bits1(gb); | |
| *mask |= (seq_scaling_list_present_flag << pos); | |
| if (!seq_scaling_list_present_flag) /* 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) { | |
| int v = get_se_golomb(gb); | |
| if (v < -128 || v > 127) { | |
| av_log(NULL, AV_LOG_ERROR, "delta scale %d is invalid\n", v); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| next = (last + v) & 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; | |
| } | |
| return 0; | |
| } | |
| /* returns non zero if the provided SPS scaling matrix has been filled */ | |
| static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps, | |
| const PPS *pps, int is_sps, | |
| int present_flag, uint16_t *mask, | |
| 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] | |
| }; | |
| int ret = 0; | |
| *mask = 0x0; | |
| if (present_flag) { | |
| ret |= decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0], mask, 0); // Intra, Y | |
| ret |= decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0], mask, 1); // Intra, Cr | |
| ret |= decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1], mask, 2); // Intra, Cb | |
| ret |= decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1], mask, 3); // Inter, Y | |
| ret |= decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3], mask, 4); // Inter, Cr | |
| ret |= decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4], mask, 5); // Inter, Cb | |
| if (is_sps || pps->transform_8x8_mode) { | |
| ret |= decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2], mask, 6); // Intra, Y | |
| ret |= decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3], mask, 7); // Inter, Y | |
| if (sps->chroma_format_idc == 3) { | |
| ret |= decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0], mask, 8); // Intra, Cr | |
| ret |= decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3], mask, 9); // Inter, Cr | |
| ret |= decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1], mask, 10); // Intra, Cb | |
| ret |= decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4], mask, 11); // Inter, Cb | |
| } | |
| } | |
| if (!ret) | |
| ret = is_sps; | |
| } | |
| return ret; | |
| } | |
| void ff_h264_ps_uninit(H264ParamSets *ps) | |
| { | |
| int i; | |
| for (i = 0; i < MAX_SPS_COUNT; i++) | |
| ff_refstruct_unref(&ps->sps_list[i]); | |
| for (i = 0; i < MAX_PPS_COUNT; i++) | |
| ff_refstruct_unref(&ps->pps_list[i]); | |
| ff_refstruct_unref(&ps->pps); | |
| ps->sps = NULL; | |
| } | |
| int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, | |
| H264ParamSets *ps, int ignore_truncation) | |
| { | |
| int profile_idc, level_idc, constraint_set_flags = 0; | |
| unsigned int sps_id; | |
| int i, log2_max_frame_num_minus4; | |
| SPS *sps; | |
| int ret; | |
| sps = ff_refstruct_allocz(sizeof(*sps)); | |
| if (!sps) | |
| return AVERROR(ENOMEM); | |
| sps->data_size = gb->buffer_end - gb->buffer; | |
| if (sps->data_size > sizeof(sps->data)) { | |
| av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized SPS\n"); | |
| sps->data_size = sizeof(sps->data); | |
| } | |
| memcpy(sps->data, gb->buffer, sps->data_size); | |
| // Re-add the removed stop bit (may be used by hwaccels). | |
| if (!(gb->size_in_bits & 7) && sps->data_size < sizeof(sps->data)) | |
| sps->data[sps->data_size++] = 0x80; | |
| 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); | |
| goto fail; | |
| } | |
| 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; | |
| sps->vui.video_full_range_flag = -1; | |
| memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4)); | |
| memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8)); | |
| sps->scaling_matrix_present = 0; | |
| sps->vui.matrix_coeffs = AVCOL_SPC_UNSPECIFIED; | |
| 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 > 3U) { | |
| 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); | |
| if (sps->residual_color_transform_flag) { | |
| av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n"); | |
| goto fail; | |
| } | |
| } | |
| sps->bit_depth_luma = get_ue_golomb_31(gb) + 8; | |
| sps->bit_depth_chroma = get_ue_golomb_31(gb) + 8; | |
| if (sps->bit_depth_chroma != sps->bit_depth_luma) { | |
| avpriv_request_sample(avctx, | |
| "Different chroma and luma bit depth"); | |
| goto fail; | |
| } | |
| if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 || | |
| sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) { | |
| av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n", | |
| sps->bit_depth_luma, sps->bit_depth_chroma); | |
| goto fail; | |
| } | |
| sps->transform_bypass = get_bits1(gb); | |
| ret = decode_scaling_matrices(gb, sps, NULL, 1, get_bits1(gb), | |
| &sps->scaling_matrix_present_mask, | |
| sps->scaling_matrix4, sps->scaling_matrix8); | |
| if (ret < 0) | |
| goto fail; | |
| sps->scaling_matrix_present |= ret; | |
| } else { | |
| sps->chroma_format_idc = 1; | |
| sps->bit_depth_luma = 8; | |
| sps->bit_depth_chroma = 8; | |
| } | |
| log2_max_frame_num_minus4 = get_ue_golomb_31(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 | |
| unsigned t = get_ue_golomb_31(gb); | |
| if (t>12) { | |
| av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t); | |
| goto fail; | |
| } | |
| sps->log2_max_poc_lsb = t + 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_long(gb); | |
| sps->offset_for_top_to_bottom_field = get_se_golomb_long(gb); | |
| if ( sps->offset_for_non_ref_pic == INT32_MIN | |
| || sps->offset_for_top_to_bottom_field == INT32_MIN | |
| ) { | |
| av_log(avctx, AV_LOG_ERROR, | |
| "offset_for_non_ref_pic or offset_for_top_to_bottom_field is out of range\n"); | |
| goto fail; | |
| } | |
| 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_long(gb); | |
| if (sps->offset_for_ref_frame[i] == INT32_MIN) { | |
| av_log(avctx, AV_LOG_ERROR, | |
| "offset_for_ref_frame is out of range\n"); | |
| goto fail; | |
| } | |
| } | |
| } 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 (avctx->codec_tag == MKTAG('S', 'M', 'V', '2')) | |
| sps->ref_frame_count = FFMAX(2, sps->ref_frame_count); | |
| if (sps->ref_frame_count > H264_MAX_DPB_FRAMES) { | |
| 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 / 2U) { | |
| av_log(avctx, AV_LOG_ERROR, "height overflow\n"); | |
| goto fail; | |
| } | |
| sps->mb_height *= 2 - sps->frame_mbs_only_flag; | |
| if (!sps->frame_mbs_only_flag) | |
| sps->mb_aff = get_bits1(gb); | |
| else | |
| sps->mb_aff = 0; | |
| 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; | |
| } | |
| sps->direct_8x8_inference_flag = get_bits1(gb); | |
| 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); | |
| int width = 16 * sps->mb_width; | |
| int height = 16 * sps->mb_height; | |
| 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 > (unsigned)INT_MAX / 4 / step_x || | |
| crop_right > (unsigned)INT_MAX / 4 / step_x || | |
| crop_top > (unsigned)INT_MAX / 4 / step_y || | |
| crop_bottom> (unsigned)INT_MAX / 4 / step_y || | |
| (crop_left + crop_right ) * step_x >= width || | |
| (crop_top + crop_bottom) * step_y >= height | |
| ) { | |
| av_log(avctx, AV_LOG_ERROR, "crop values invalid %d %d %d %d / %d %d\n", crop_left, crop_right, crop_top, crop_bottom, width, height); | |
| goto fail; | |
| } | |
| 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) { | |
| ret = decode_vui_parameters(gb, avctx, sps); | |
| if (ret < 0) | |
| goto fail; | |
| } | |
| if (get_bits_left(gb) < 0) { | |
| av_log_once(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR, AV_LOG_DEBUG, | |
| &ps->overread_warning_printed[sps->vui_parameters_present_flag], | |
| "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb)); | |
| if (!ignore_truncation) | |
| 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 = H264_MAX_DPB_FRAMES - 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->vui.sar.den) | |
| sps->vui.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" b%d reo:%d\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, | |
| sps->bit_depth_luma, | |
| sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1 | |
| ); | |
| } | |
| /* 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], sps, sizeof(*sps))) { | |
| ff_refstruct_unref(&sps); | |
| } else { | |
| remove_sps(ps, sps_id); | |
| ps->sps_list[sps_id] = sps; | |
| } | |
| return 0; | |
| fail: | |
| ff_refstruct_unref(&sps); | |
| 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); | |
| memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff)); | |
| 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)]; | |
| } | |
| static int more_rbsp_data_in_pps(const SPS *sps, void *logctx) | |
| { | |
| int profile_idc = sps->profile_idc; | |
| if ((profile_idc == 66 || profile_idc == 77 || | |
| profile_idc == 88) && (sps->constraint_set_flags & 7)) { | |
| av_log(logctx, AV_LOG_VERBOSE, | |
| "Current profile doesn't provide more RBSP data in PPS, skipping\n"); | |
| return 0; | |
| } | |
| return 1; | |
| } | |
| static void pps_free(FFRefStructOpaque unused, void *obj) | |
| { | |
| PPS *pps = obj; | |
| ff_refstruct_unref(&pps->sps); | |
| } | |
| int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, | |
| H264ParamSets *ps, int bit_length) | |
| { | |
| const 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 = ff_refstruct_alloc_ext(sizeof(*pps), 0, NULL, pps_free); | |
| if (!pps) | |
| return AVERROR(ENOMEM); | |
| pps->data_size = gb->buffer_end - gb->buffer; | |
| if (pps->data_size > sizeof(pps->data)) { | |
| av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized PPS " | |
| "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n", | |
| pps->data_size, sizeof(pps->data)); | |
| pps->data_size = sizeof(pps->data); | |
| } | |
| memcpy(pps->data, gb->buffer, pps->data_size); | |
| // Re-add the removed stop bit (may be used by hwaccels). | |
| if (!(bit_length & 7) && pps->data_size < sizeof(pps->data)) | |
| pps->data[pps->data_size++] = 0x80; | |
| pps->pps_id = pps_id; | |
| 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; | |
| } | |
| pps->sps = ff_refstruct_ref_c(ps->sps_list[pps->sps_id]); | |
| sps = pps->sps; | |
| if (sps->bit_depth_luma > 14) { | |
| av_log(avctx, AV_LOG_ERROR, | |
| "Invalid luma bit depth=%d\n", | |
| sps->bit_depth_luma); | |
| ret = AVERROR_INVALIDDATA; | |
| goto fail; | |
| } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) { | |
| avpriv_report_missing_feature(avctx, | |
| "Unimplemented luma bit depth=%d", | |
| 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); | |
| avpriv_report_missing_feature(avctx, "FMO"); | |
| ret = AVERROR_PATCHWELCOME; | |
| goto fail; | |
| } | |
| 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) + 26U + qp_bd_offset; | |
| pps->init_qs = get_se_golomb(gb) + 26U + qp_bd_offset; | |
| pps->chroma_qp_index_offset[0] = get_se_golomb(gb); | |
| if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) { | |
| ret = AVERROR_INVALIDDATA; | |
| goto fail; | |
| } | |
| 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 > 0 && more_rbsp_data_in_pps(sps, avctx)) { | |
| pps->transform_8x8_mode = get_bits1(gb); | |
| pps->pic_scaling_matrix_present_flag = get_bits1(gb); | |
| ret = decode_scaling_matrices(gb, sps, pps, 0, | |
| pps->pic_scaling_matrix_present_flag, | |
| &pps->pic_scaling_matrix_present_mask, | |
| pps->scaling_matrix4, pps->scaling_matrix8); | |
| if (ret < 0) | |
| goto fail; | |
| // second_chroma_qp_index_offset | |
| pps->chroma_qp_index_offset[1] = get_se_golomb(gb); | |
| if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) { | |
| ret = AVERROR_INVALIDDATA; | |
| goto fail; | |
| } | |
| } 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; | |
| return 0; | |
| fail: | |
| ff_refstruct_unref(&pps); | |
| return ret; | |
| } |