| /* |
| * 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 / MPEG4 part10 parameter set decoding. |
| * @author Michael Niedermayer <michaelni@gmx.at> |
| */ |
| |
| #include <inttypes.h> |
| |
| #include "libavutil/imgutils.h" |
| #include "internal.h" |
| #include "avcodec.h" |
| #include "h264.h" |
| #include "h264data.h" |
| #include "golomb.h" |
| |
| #define MAX_LOG2_MAX_FRAME_NUM (12 + 4) |
| #define MIN_LOG2_MAX_FRAME_NUM 4 |
| |
| #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) |
| |
| const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM + 1] = { |
| { 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) }, |
| { 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) }, |
| { 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) }, |
| }; |
| |
| 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 inline int decode_hrd_parameters(H264Context *h, SPS *sps) |
| { |
| int cpb_count, i; |
| cpb_count = get_ue_golomb_31(&h->gb) + 1; |
| |
| if (cpb_count > 32U) { |
| av_log(h->avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| get_bits(&h->gb, 4); /* bit_rate_scale */ |
| get_bits(&h->gb, 4); /* cpb_size_scale */ |
| for (i = 0; i < cpb_count; i++) { |
| get_ue_golomb_long(&h->gb); /* bit_rate_value_minus1 */ |
| get_ue_golomb_long(&h->gb); /* cpb_size_value_minus1 */ |
| get_bits1(&h->gb); /* cbr_flag */ |
| } |
| sps->initial_cpb_removal_delay_length = get_bits(&h->gb, 5) + 1; |
| sps->cpb_removal_delay_length = get_bits(&h->gb, 5) + 1; |
| sps->dpb_output_delay_length = get_bits(&h->gb, 5) + 1; |
| sps->time_offset_length = get_bits(&h->gb, 5); |
| sps->cpb_cnt = cpb_count; |
| return 0; |
| } |
| |
| static inline int decode_vui_parameters(H264Context *h, SPS *sps) |
| { |
| int aspect_ratio_info_present_flag; |
| unsigned int aspect_ratio_idc; |
| |
| aspect_ratio_info_present_flag = get_bits1(&h->gb); |
| |
| if (aspect_ratio_info_present_flag) { |
| aspect_ratio_idc = get_bits(&h->gb, 8); |
| if (aspect_ratio_idc == EXTENDED_SAR) { |
| sps->sar.num = get_bits(&h->gb, 16); |
| sps->sar.den = get_bits(&h->gb, 16); |
| } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h264_pixel_aspect)) { |
| sps->sar = ff_h264_pixel_aspect[aspect_ratio_idc]; |
| } else { |
| av_log(h->avctx, AV_LOG_ERROR, "illegal aspect ratio\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| } else { |
| sps->sar.num = |
| sps->sar.den = 0; |
| } |
| |
| if (get_bits1(&h->gb)) /* overscan_info_present_flag */ |
| get_bits1(&h->gb); /* overscan_appropriate_flag */ |
| |
| sps->video_signal_type_present_flag = get_bits1(&h->gb); |
| if (sps->video_signal_type_present_flag) { |
| get_bits(&h->gb, 3); /* video_format */ |
| sps->full_range = get_bits1(&h->gb); /* video_full_range_flag */ |
| |
| sps->colour_description_present_flag = get_bits1(&h->gb); |
| if (sps->colour_description_present_flag) { |
| sps->color_primaries = get_bits(&h->gb, 8); /* colour_primaries */ |
| sps->color_trc = get_bits(&h->gb, 8); /* transfer_characteristics */ |
| sps->colorspace = get_bits(&h->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(&h->gb)) { |
| /* chroma_sample_location_type_top_field */ |
| h->avctx->chroma_sample_location = get_ue_golomb(&h->gb) + 1; |
| get_ue_golomb(&h->gb); /* chroma_sample_location_type_bottom_field */ |
| } |
| |
| if (show_bits1(&h->gb) && get_bits_left(&h->gb) < 10) { |
| av_log(h->avctx, AV_LOG_WARNING, "Truncated VUI\n"); |
| return 0; |
| } |
| |
| sps->timing_info_present_flag = get_bits1(&h->gb); |
| if (sps->timing_info_present_flag) { |
| unsigned num_units_in_tick = get_bits_long(&h->gb, 32); |
| unsigned time_scale = get_bits_long(&h->gb, 32); |
| if (!num_units_in_tick || !time_scale) { |
| av_log(h->avctx, 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(&h->gb); |
| } |
| |
| sps->nal_hrd_parameters_present_flag = get_bits1(&h->gb); |
| if (sps->nal_hrd_parameters_present_flag) |
| if (decode_hrd_parameters(h, sps) < 0) |
| return AVERROR_INVALIDDATA; |
| sps->vcl_hrd_parameters_present_flag = get_bits1(&h->gb); |
| if (sps->vcl_hrd_parameters_present_flag) |
| if (decode_hrd_parameters(h, sps) < 0) |
| return AVERROR_INVALIDDATA; |
| if (sps->nal_hrd_parameters_present_flag || |
| sps->vcl_hrd_parameters_present_flag) |
| get_bits1(&h->gb); /* low_delay_hrd_flag */ |
| sps->pic_struct_present_flag = get_bits1(&h->gb); |
| if (!get_bits_left(&h->gb)) |
| return 0; |
| sps->bitstream_restriction_flag = get_bits1(&h->gb); |
| if (sps->bitstream_restriction_flag) { |
| get_bits1(&h->gb); /* motion_vectors_over_pic_boundaries_flag */ |
| get_ue_golomb(&h->gb); /* max_bytes_per_pic_denom */ |
| get_ue_golomb(&h->gb); /* max_bits_per_mb_denom */ |
| get_ue_golomb(&h->gb); /* log2_max_mv_length_horizontal */ |
| get_ue_golomb(&h->gb); /* log2_max_mv_length_vertical */ |
| sps->num_reorder_frames = get_ue_golomb(&h->gb); |
| get_ue_golomb(&h->gb); /*max_dec_frame_buffering*/ |
| |
| if (get_bits_left(&h->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(h->avctx, 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 void decode_scaling_list(H264Context *h, 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 ? zigzag_scan : ff_zigzag_direct; |
| if (!get_bits1(&h->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(&h->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]) |
| { |
| 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(&h->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 |
| decode_scaling_list(h, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y |
| if (sps->chroma_format_idc == 3) { |
| decode_scaling_list(h, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr |
| decode_scaling_list(h, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr |
| decode_scaling_list(h, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb |
| decode_scaling_list(h, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb |
| } |
| } |
| } |
| } |
| |
| int ff_h264_decode_seq_parameter_set(H264Context *h, 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; |
| |
| sps = av_mallocz(sizeof(SPS)); |
| if (!sps) |
| return AVERROR(ENOMEM); |
| |
| sps->data_size = h->gb.buffer_end - h->gb.buffer; |
| if (sps->data_size > sizeof(sps->data)) { |
| av_log(h->avctx, AV_LOG_WARNING, "Truncating likely oversized SPS\n"); |
| sps->data_size = sizeof(sps->data); |
| } |
| memcpy(sps->data, h->gb.buffer, sps->data_size); |
| |
| profile_idc = get_bits(&h->gb, 8); |
| constraint_set_flags |= get_bits1(&h->gb) << 0; // constraint_set0_flag |
| constraint_set_flags |= get_bits1(&h->gb) << 1; // constraint_set1_flag |
| constraint_set_flags |= get_bits1(&h->gb) << 2; // constraint_set2_flag |
| constraint_set_flags |= get_bits1(&h->gb) << 3; // constraint_set3_flag |
| constraint_set_flags |= get_bits1(&h->gb) << 4; // constraint_set4_flag |
| constraint_set_flags |= get_bits1(&h->gb) << 5; // constraint_set5_flag |
| skip_bits(&h->gb, 2); // reserved_zero_2bits |
| level_idc = get_bits(&h->gb, 8); |
| sps_id = get_ue_golomb_31(&h->gb); |
| |
| if (sps_id >= MAX_SPS_COUNT) { |
| av_log(h->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->full_range = -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->colorspace = 2; //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(&h->gb); |
| if (sps->chroma_format_idc > 3U) { |
| avpriv_request_sample(h->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(&h->gb); |
| if (sps->residual_color_transform_flag) { |
| av_log(h->avctx, AV_LOG_ERROR, "separate color planes are not supported\n"); |
| goto fail; |
| } |
| } |
| sps->bit_depth_luma = get_ue_golomb(&h->gb) + 8; |
| sps->bit_depth_chroma = get_ue_golomb(&h->gb) + 8; |
| if (sps->bit_depth_chroma != sps->bit_depth_luma) { |
| avpriv_request_sample(h->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(h->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(&h->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; |
| } |
| |
| log2_max_frame_num_minus4 = get_ue_golomb(&h->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(h->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(&h->gb); |
| |
| if (sps->poc_type == 0) { // FIXME #define |
| unsigned t = get_ue_golomb(&h->gb); |
| if (t>12) { |
| av_log(h->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(&h->gb); |
| sps->offset_for_non_ref_pic = get_se_golomb(&h->gb); |
| sps->offset_for_top_to_bottom_field = get_se_golomb(&h->gb); |
| sps->poc_cycle_length = get_ue_golomb(&h->gb); |
| |
| if ((unsigned)sps->poc_cycle_length >= |
| FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) { |
| av_log(h->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(&h->gb); |
| } else if (sps->poc_type != 2) { |
| av_log(h->avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type); |
| goto fail; |
| } |
| |
| sps->ref_frame_count = get_ue_golomb_31(&h->gb); |
| if (h->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_PICTURE_COUNT - 2 || |
| sps->ref_frame_count > 16U) { |
| av_log(h->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(&h->gb); |
| sps->mb_width = get_ue_golomb(&h->gb) + 1; |
| sps->mb_height = get_ue_golomb(&h->gb) + 1; |
| 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, h->avctx)) { |
| av_log(h->avctx, AV_LOG_ERROR, "mb_width/height overflow\n"); |
| goto fail; |
| } |
| |
| sps->frame_mbs_only_flag = get_bits1(&h->gb); |
| if (!sps->frame_mbs_only_flag) |
| sps->mb_aff = get_bits1(&h->gb); |
| else |
| sps->mb_aff = 0; |
| |
| sps->direct_8x8_inference_flag = get_bits1(&h->gb); |
| |
| #ifndef ALLOW_INTERLACE |
| if (sps->mb_aff) |
| av_log(h->avctx, AV_LOG_ERROR, |
| "MBAFF support not included; enable it at compile-time.\n"); |
| #endif |
| sps->crop = get_bits1(&h->gb); |
| if (sps->crop) { |
| unsigned int crop_left = get_ue_golomb(&h->gb); |
| unsigned int crop_right = get_ue_golomb(&h->gb); |
| unsigned int crop_top = get_ue_golomb(&h->gb); |
| unsigned int crop_bottom = get_ue_golomb(&h->gb); |
| int width = 16 * sps->mb_width; |
| int height = 16 * sps->mb_height * (2 - sps->frame_mbs_only_flag); |
| |
| if (h->avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) { |
| av_log(h->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)) && |
| !(h->avctx->flags & AV_CODEC_FLAG_UNALIGNED)) { |
| crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8)); |
| av_log(h->avctx, AV_LOG_WARNING, |
| "Reducing left cropping to %d " |
| "chroma samples to preserve alignment.\n", |
| crop_left); |
| } |
| |
| 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(h->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(&h->gb); |
| if (sps->vui_parameters_present_flag) { |
| int ret = decode_vui_parameters(h, sps); |
| if (ret < 0) |
| goto fail; |
| } |
| |
| if (get_bits_left(&h->gb) < 0) { |
| av_log(h->avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR, |
| "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(&h->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->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 (h->avctx->debug & FF_DEBUG_PICT_INFO) { |
| static const char csp[4][5] = { "Gray", "420", "422", "444" }; |
| av_log(h->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 |
| ); |
| } |
| sps->new = 1; |
| |
| av_free(h->sps_buffers[sps_id]); |
| h->sps_buffers[sps_id] = sps; |
| |
| return 0; |
| |
| fail: |
| av_free(sps); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| 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(H264Context *h, PPS *pps) |
| { |
| const SPS *sps = h->sps_buffers[pps->sps_id]; |
| int profile_idc = sps->profile_idc; |
| |
| if ((profile_idc == 66 || profile_idc == 77 || |
| profile_idc == 88) && (sps->constraint_set_flags & 7)) { |
| av_log(h->avctx, AV_LOG_VERBOSE, |
| "Current profile doesn't provide more RBSP data in PPS, skipping\n"); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length) |
| { |
| const SPS *sps; |
| unsigned int pps_id = get_ue_golomb(&h->gb); |
| PPS *pps; |
| int qp_bd_offset; |
| int bits_left; |
| int ret; |
| |
| if (pps_id >= MAX_PPS_COUNT) { |
| av_log(h->avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| pps = av_mallocz(sizeof(PPS)); |
| if (!pps) |
| return AVERROR(ENOMEM); |
| pps->data_size = h->gb.buffer_end - h->gb.buffer; |
| if (pps->data_size > sizeof(pps->data)) { |
| av_log(h->avctx, AV_LOG_WARNING, "Truncating likely oversized PPS\n"); |
| pps->data_size = sizeof(pps->data); |
| } |
| memcpy(pps->data, h->gb.buffer, pps->data_size); |
| pps->sps_id = get_ue_golomb_31(&h->gb); |
| if ((unsigned)pps->sps_id >= MAX_SPS_COUNT || |
| !h->sps_buffers[pps->sps_id]) { |
| av_log(h->avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id); |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| sps = h->sps_buffers[pps->sps_id]; |
| if (sps->bit_depth_luma > 14) { |
| av_log(h->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) { |
| av_log(h->avctx, AV_LOG_ERROR, |
| "Unimplemented luma bit depth=%d\n", |
| sps->bit_depth_luma); |
| ret = AVERROR_PATCHWELCOME; |
| goto fail; |
| } |
| |
| pps->cabac = get_bits1(&h->gb); |
| pps->pic_order_present = get_bits1(&h->gb); |
| pps->slice_group_count = get_ue_golomb(&h->gb) + 1; |
| if (pps->slice_group_count > 1) { |
| pps->mb_slice_group_map_type = get_ue_golomb(&h->gb); |
| av_log(h->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(&h->gb) + 1; |
| pps->ref_count[1] = get_ue_golomb(&h->gb) + 1; |
| if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) { |
| av_log(h->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(&h->gb); |
| pps->weighted_bipred_idc = get_bits(&h->gb, 2); |
| pps->init_qp = get_se_golomb(&h->gb) + 26 + qp_bd_offset; |
| pps->init_qs = get_se_golomb(&h->gb) + 26 + qp_bd_offset; |
| pps->chroma_qp_index_offset[0] = get_se_golomb(&h->gb); |
| pps->deblocking_filter_parameters_present = get_bits1(&h->gb); |
| pps->constrained_intra_pred = get_bits1(&h->gb); |
| pps->redundant_pic_cnt_present = get_bits1(&h->gb); |
| |
| pps->transform_8x8_mode = 0; |
| // contents of sps/pps can change even if id doesn't, so reinit |
| h->dequant_coeff_pps = -1; |
| 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)); |
| |
| bits_left = bit_length - get_bits_count(&h->gb); |
| if (bits_left > 0 && more_rbsp_data_in_pps(h, pps)) { |
| pps->transform_8x8_mode = get_bits1(&h->gb); |
| decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, |
| pps->scaling_matrix4, pps->scaling_matrix8); |
| // second_chroma_qp_index_offset |
| pps->chroma_qp_index_offset[1] = get_se_golomb(&h->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); |
| if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1]) |
| pps->chroma_qp_diff = 1; |
| |
| if (h->avctx->debug & FF_DEBUG_PICT_INFO) { |
| av_log(h->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" : ""); |
| } |
| |
| av_free(h->pps_buffers[pps_id]); |
| h->pps_buffers[pps_id] = pps; |
| return 0; |
| |
| fail: |
| av_free(pps); |
| return ret; |
| } |
