| /* | |
| * H.264/HEVC common parsing code | |
| * | |
| * 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 | |
| */ | |
| #include <string.h> | |
| #include "config.h" | |
| #include "libavutil/intmath.h" | |
| #include "libavutil/intreadwrite.h" | |
| #include "libavutil/mem.h" | |
| #include "bytestream.h" | |
| #include "hevc.h" | |
| #include "h264.h" | |
| #include "h2645_parse.h" | |
| #include "vvc.h" | |
| int ff_h2645_extract_rbsp(const uint8_t *src, int length, | |
| H2645RBSP *rbsp, H2645NAL *nal, int small_padding) | |
| { | |
| int i, si, di; | |
| uint8_t *dst; | |
| nal->skipped_bytes = 0; | |
| #define STARTCODE_TEST \ | |
| if (i + 2 < length && src[i + 1] == 0 && \ | |
| (src[i + 2] == 3 || src[i + 2] == 1)) { \ | |
| if (src[i + 2] == 1) { \ | |
| /* startcode, so we must be past the end */ \ | |
| length = i; \ | |
| } \ | |
| break; \ | |
| } | |
| #if HAVE_FAST_UNALIGNED | |
| #define FIND_FIRST_ZERO \ | |
| if (i > 0 && !src[i]) \ | |
| i--; \ | |
| while (src[i]) \ | |
| i++ | |
| #if HAVE_FAST_64BIT | |
| for (i = 0; i + 1 < length; i += 9) { | |
| if (!((~AV_RN64(src + i) & | |
| (AV_RN64(src + i) - 0x0100010001000101ULL)) & | |
| 0x8000800080008080ULL)) | |
| continue; | |
| FIND_FIRST_ZERO; | |
| STARTCODE_TEST; | |
| i -= 7; | |
| } | |
| #else | |
| for (i = 0; i + 1 < length; i += 5) { | |
| if (!((~AV_RN32(src + i) & | |
| (AV_RN32(src + i) - 0x01000101U)) & | |
| 0x80008080U)) | |
| continue; | |
| FIND_FIRST_ZERO; | |
| STARTCODE_TEST; | |
| i -= 3; | |
| } | |
| #endif /* HAVE_FAST_64BIT */ | |
| #else | |
| for (i = 0; i + 1 < length; i += 2) { | |
| if (src[i]) | |
| continue; | |
| if (i > 0 && src[i - 1] == 0) | |
| i--; | |
| STARTCODE_TEST; | |
| } | |
| #endif /* HAVE_FAST_UNALIGNED */ | |
| if (i >= length - 1 && small_padding) { // no escaped 0 | |
| nal->data = | |
| nal->raw_data = src; | |
| nal->size = | |
| nal->raw_size = length; | |
| return length; | |
| } else if (i > length) | |
| i = length; | |
| dst = &rbsp->rbsp_buffer[rbsp->rbsp_buffer_size]; | |
| memcpy(dst, src, i); | |
| si = di = i; | |
| while (si + 2 < length) { | |
| // remove escapes (very rare 1:2^22) | |
| if (src[si + 2] > 3) { | |
| dst[di++] = src[si++]; | |
| dst[di++] = src[si++]; | |
| } else if (src[si] == 0 && src[si + 1] == 0 && src[si + 2] != 0) { | |
| if (src[si + 2] == 3) { // escape | |
| dst[di++] = 0; | |
| dst[di++] = 0; | |
| si += 3; | |
| if (nal->skipped_bytes_pos) { | |
| nal->skipped_bytes++; | |
| if (nal->skipped_bytes_pos_size < nal->skipped_bytes) { | |
| nal->skipped_bytes_pos_size *= 2; | |
| av_assert0(nal->skipped_bytes_pos_size >= nal->skipped_bytes); | |
| av_reallocp_array(&nal->skipped_bytes_pos, | |
| nal->skipped_bytes_pos_size, | |
| sizeof(*nal->skipped_bytes_pos)); | |
| if (!nal->skipped_bytes_pos) { | |
| nal->skipped_bytes_pos_size = 0; | |
| return AVERROR(ENOMEM); | |
| } | |
| } | |
| if (nal->skipped_bytes_pos) | |
| nal->skipped_bytes_pos[nal->skipped_bytes-1] = di - 1; | |
| } | |
| continue; | |
| } else // next start code | |
| goto nsc; | |
| } | |
| dst[di++] = src[si++]; | |
| } | |
| while (si < length) | |
| dst[di++] = src[si++]; | |
| nsc: | |
| memset(dst + di, 0, AV_INPUT_BUFFER_PADDING_SIZE); | |
| nal->data = dst; | |
| nal->size = di; | |
| nal->raw_data = src; | |
| nal->raw_size = si; | |
| rbsp->rbsp_buffer_size += si; | |
| return si; | |
| } | |
| static const char *const vvc_nal_type_name[32] = { | |
| "TRAIL_NUT", // VVC_TRAIL_NUT | |
| "STSA_NUT", // VVC_STSA_NUT | |
| "RADL_NUT", // VVC_RADL_NUT | |
| "RASL_NUT", // VVC_RASL_NUT | |
| "RSV_VCL4", // VVC_RSV_VCL_4 | |
| "RSV_VCL5", // VVC_RSV_VCL_5 | |
| "RSV_VCL6", // VVC_RSV_VCL_6 | |
| "IDR_W_RADL", // VVC_IDR_W_RADL | |
| "IDR_N_LP", // VVC_IDR_N_LP | |
| "CRA_NUT", // VVC_CRA_NUT | |
| "GDR_NUT", // VVC_GDR_NUT | |
| "RSV_IRAP_11", // VVC_RSV_IRAP_11 | |
| "OPI_NUT", // VVC_OPI_NUT | |
| "DCI_NUT", // VVC_DCI_NUT | |
| "VPS_NUT", // VVC_VPS_NUT | |
| "SPS_NUT", // VVC_SPS_NUT | |
| "PPS_NUT", // VVC_PPS_NUT | |
| "APS_PREFIX", // VVC_PREFIX_APS_NUT | |
| "APS_SUFFIX", // VVC_SUFFIX_APS_NUT | |
| "PH_NUT", // VVC_PH_NUT | |
| "AUD_NUT", // VVC_AUD_NUT | |
| "EOS_NUT", // VVC_EOS_NUT | |
| "EOB_NUT", // VVC_EOB_NUT | |
| "SEI_PREFIX", // VVC_PREFIX_SEI_NUT | |
| "SEI_SUFFIX", // VVC_SUFFIX_SEI_NUT | |
| "FD_NUT", // VVC_FD_NUT | |
| "RSV_NVCL26", // VVC_RSV_NVCL_26 | |
| "RSV_NVCL27", // VVC_RSV_NVCL_27 | |
| "UNSPEC28", // VVC_UNSPEC_28 | |
| "UNSPEC29", // VVC_UNSPEC_29 | |
| "UNSPEC30", // VVC_UNSPEC_30 | |
| "UNSPEC31", // VVC_UNSPEC_31 | |
| }; | |
| static const char *vvc_nal_unit_name(int nal_type) | |
| { | |
| av_assert0(nal_type >= 0 && nal_type < 32); | |
| return vvc_nal_type_name[nal_type]; | |
| } | |
| static const char *const hevc_nal_type_name[64] = { | |
| "TRAIL_N", // HEVC_NAL_TRAIL_N | |
| "TRAIL_R", // HEVC_NAL_TRAIL_R | |
| "TSA_N", // HEVC_NAL_TSA_N | |
| "TSA_R", // HEVC_NAL_TSA_R | |
| "STSA_N", // HEVC_NAL_STSA_N | |
| "STSA_R", // HEVC_NAL_STSA_R | |
| "RADL_N", // HEVC_NAL_RADL_N | |
| "RADL_R", // HEVC_NAL_RADL_R | |
| "RASL_N", // HEVC_NAL_RASL_N | |
| "RASL_R", // HEVC_NAL_RASL_R | |
| "RSV_VCL_N10", // HEVC_NAL_VCL_N10 | |
| "RSV_VCL_R11", // HEVC_NAL_VCL_R11 | |
| "RSV_VCL_N12", // HEVC_NAL_VCL_N12 | |
| "RSV_VLC_R13", // HEVC_NAL_VCL_R13 | |
| "RSV_VCL_N14", // HEVC_NAL_VCL_N14 | |
| "RSV_VCL_R15", // HEVC_NAL_VCL_R15 | |
| "BLA_W_LP", // HEVC_NAL_BLA_W_LP | |
| "BLA_W_RADL", // HEVC_NAL_BLA_W_RADL | |
| "BLA_N_LP", // HEVC_NAL_BLA_N_LP | |
| "IDR_W_RADL", // HEVC_NAL_IDR_W_RADL | |
| "IDR_N_LP", // HEVC_NAL_IDR_N_LP | |
| "CRA_NUT", // HEVC_NAL_CRA_NUT | |
| "RSV_IRAP_VCL22", // HEVC_NAL_RSV_IRAP_VCL22 | |
| "RSV_IRAP_VCL23", // HEVC_NAL_RSV_IRAP_VCL23 | |
| "RSV_VCL24", // HEVC_NAL_RSV_VCL24 | |
| "RSV_VCL25", // HEVC_NAL_RSV_VCL25 | |
| "RSV_VCL26", // HEVC_NAL_RSV_VCL26 | |
| "RSV_VCL27", // HEVC_NAL_RSV_VCL27 | |
| "RSV_VCL28", // HEVC_NAL_RSV_VCL28 | |
| "RSV_VCL29", // HEVC_NAL_RSV_VCL29 | |
| "RSV_VCL30", // HEVC_NAL_RSV_VCL30 | |
| "RSV_VCL31", // HEVC_NAL_RSV_VCL31 | |
| "VPS", // HEVC_NAL_VPS | |
| "SPS", // HEVC_NAL_SPS | |
| "PPS", // HEVC_NAL_PPS | |
| "AUD", // HEVC_NAL_AUD | |
| "EOS_NUT", // HEVC_NAL_EOS_NUT | |
| "EOB_NUT", // HEVC_NAL_EOB_NUT | |
| "FD_NUT", // HEVC_NAL_FD_NUT | |
| "SEI_PREFIX", // HEVC_NAL_SEI_PREFIX | |
| "SEI_SUFFIX", // HEVC_NAL_SEI_SUFFIX | |
| "RSV_NVCL41", // HEVC_NAL_RSV_NVCL41 | |
| "RSV_NVCL42", // HEVC_NAL_RSV_NVCL42 | |
| "RSV_NVCL43", // HEVC_NAL_RSV_NVCL43 | |
| "RSV_NVCL44", // HEVC_NAL_RSV_NVCL44 | |
| "RSV_NVCL45", // HEVC_NAL_RSV_NVCL45 | |
| "RSV_NVCL46", // HEVC_NAL_RSV_NVCL46 | |
| "RSV_NVCL47", // HEVC_NAL_RSV_NVCL47 | |
| "UNSPEC48", // HEVC_NAL_UNSPEC48 | |
| "UNSPEC49", // HEVC_NAL_UNSPEC49 | |
| "UNSPEC50", // HEVC_NAL_UNSPEC50 | |
| "UNSPEC51", // HEVC_NAL_UNSPEC51 | |
| "UNSPEC52", // HEVC_NAL_UNSPEC52 | |
| "UNSPEC53", // HEVC_NAL_UNSPEC53 | |
| "UNSPEC54", // HEVC_NAL_UNSPEC54 | |
| "UNSPEC55", // HEVC_NAL_UNSPEC55 | |
| "UNSPEC56", // HEVC_NAL_UNSPEC56 | |
| "UNSPEC57", // HEVC_NAL_UNSPEC57 | |
| "UNSPEC58", // HEVC_NAL_UNSPEC58 | |
| "UNSPEC59", // HEVC_NAL_UNSPEC59 | |
| "UNSPEC60", // HEVC_NAL_UNSPEC60 | |
| "UNSPEC61", // HEVC_NAL_UNSPEC61 | |
| "UNSPEC62", // HEVC_NAL_UNSPEC62 | |
| "UNSPEC63", // HEVC_NAL_UNSPEC63 | |
| }; | |
| static const char *hevc_nal_unit_name(int nal_type) | |
| { | |
| av_assert0(nal_type >= 0 && nal_type < 64); | |
| return hevc_nal_type_name[nal_type]; | |
| } | |
| static const char *const h264_nal_type_name[32] = { | |
| "Unspecified 0", //H264_NAL_UNSPECIFIED | |
| "Coded slice of a non-IDR picture", // H264_NAL_SLICE | |
| "Coded slice data partition A", // H264_NAL_DPA | |
| "Coded slice data partition B", // H264_NAL_DPB | |
| "Coded slice data partition C", // H264_NAL_DPC | |
| "IDR", // H264_NAL_IDR_SLICE | |
| "SEI", // H264_NAL_SEI | |
| "SPS", // H264_NAL_SPS | |
| "PPS", // H264_NAL_PPS | |
| "AUD", // H264_NAL_AUD | |
| "End of sequence", // H264_NAL_END_SEQUENCE | |
| "End of stream", // H264_NAL_END_STREAM | |
| "Filler data", // H264_NAL_FILLER_DATA | |
| "SPS extension", // H264_NAL_SPS_EXT | |
| "Prefix", // H264_NAL_PREFIX | |
| "Subset SPS", // H264_NAL_SUB_SPS | |
| "Depth parameter set", // H264_NAL_DPS | |
| "Reserved 17", // H264_NAL_RESERVED17 | |
| "Reserved 18", // H264_NAL_RESERVED18 | |
| "Auxiliary coded picture without partitioning", // H264_NAL_AUXILIARY_SLICE | |
| "Slice extension", // H264_NAL_EXTEN_SLICE | |
| "Slice extension for a depth view or a 3D-AVC texture view", // H264_NAL_DEPTH_EXTEN_SLICE | |
| "Reserved 22", // H264_NAL_RESERVED22 | |
| "Reserved 23", // H264_NAL_RESERVED23 | |
| "Unspecified 24", // H264_NAL_UNSPECIFIED24 | |
| "Unspecified 25", // H264_NAL_UNSPECIFIED25 | |
| "Unspecified 26", // H264_NAL_UNSPECIFIED26 | |
| "Unspecified 27", // H264_NAL_UNSPECIFIED27 | |
| "Unspecified 28", // H264_NAL_UNSPECIFIED28 | |
| "Unspecified 29", // H264_NAL_UNSPECIFIED29 | |
| "Unspecified 30", // H264_NAL_UNSPECIFIED30 | |
| "Unspecified 31", // H264_NAL_UNSPECIFIED31 | |
| }; | |
| static const char *h264_nal_unit_name(int nal_type) | |
| { | |
| av_assert0(nal_type >= 0 && nal_type < 32); | |
| return h264_nal_type_name[nal_type]; | |
| } | |
| static int get_bit_length(H2645NAL *nal, int min_size, int skip_trailing_zeros) | |
| { | |
| int size = nal->size; | |
| int trailing_padding = 0; | |
| while (skip_trailing_zeros && size > 0 && nal->data[size - 1] == 0) | |
| size--; | |
| if (!size) | |
| return 0; | |
| if (size <= min_size) { | |
| if (nal->size < min_size) | |
| return AVERROR_INVALIDDATA; | |
| size = min_size; | |
| } else { | |
| int v = nal->data[size - 1]; | |
| /* remove the stop bit and following trailing zeros, | |
| * or nothing for damaged bitstreams */ | |
| if (v) | |
| trailing_padding = ff_ctz(v) + 1; | |
| } | |
| if (size > INT_MAX / 8) | |
| return AVERROR(ERANGE); | |
| size *= 8; | |
| return size - trailing_padding; | |
| } | |
| /** | |
| * @return AVERROR_INVALIDDATA if the packet is not a valid NAL unit, | |
| * 0 otherwise | |
| */ | |
| static int vvc_parse_nal_header(H2645NAL *nal, void *logctx) | |
| { | |
| GetBitContext *gb = &nal->gb; | |
| if (get_bits1(gb) != 0) //forbidden_zero_bit | |
| return AVERROR_INVALIDDATA; | |
| skip_bits1(gb); //nuh_reserved_zero_bit | |
| nal->nuh_layer_id = get_bits(gb, 6); | |
| nal->type = get_bits(gb, 5); | |
| nal->temporal_id = get_bits(gb, 3) - 1; | |
| if (nal->temporal_id < 0) | |
| return AVERROR_INVALIDDATA; | |
| if ((nal->type >= VVC_IDR_W_RADL && nal->type <= VVC_RSV_IRAP_11) && nal->temporal_id) | |
| return AVERROR_INVALIDDATA; | |
| av_log(logctx, AV_LOG_DEBUG, | |
| "nal_unit_type: %d(%s), nuh_layer_id: %d, temporal_id: %d\n", | |
| nal->type, vvc_nal_unit_name(nal->type), nal->nuh_layer_id, nal->temporal_id); | |
| return 0; | |
| } | |
| static int hevc_parse_nal_header(H2645NAL *nal, void *logctx) | |
| { | |
| GetBitContext *gb = &nal->gb; | |
| if (get_bits1(gb) != 0) | |
| return AVERROR_INVALIDDATA; | |
| nal->type = get_bits(gb, 6); | |
| nal->nuh_layer_id = get_bits(gb, 6); | |
| nal->temporal_id = get_bits(gb, 3) - 1; | |
| if (nal->temporal_id < 0) | |
| return AVERROR_INVALIDDATA; | |
| av_log(logctx, AV_LOG_DEBUG, | |
| "nal_unit_type: %d(%s), nuh_layer_id: %d, temporal_id: %d\n", | |
| nal->type, hevc_nal_unit_name(nal->type), nal->nuh_layer_id, nal->temporal_id); | |
| return 0; | |
| } | |
| static int h264_parse_nal_header(H2645NAL *nal, void *logctx) | |
| { | |
| GetBitContext *gb = &nal->gb; | |
| if (get_bits1(gb) != 0) | |
| return AVERROR_INVALIDDATA; | |
| nal->ref_idc = get_bits(gb, 2); | |
| nal->type = get_bits(gb, 5); | |
| av_log(logctx, AV_LOG_DEBUG, | |
| "nal_unit_type: %d(%s), nal_ref_idc: %d\n", | |
| nal->type, h264_nal_unit_name(nal->type), nal->ref_idc); | |
| return 0; | |
| } | |
| static int find_next_start_code(const uint8_t *buf, const uint8_t *next_avc) | |
| { | |
| int i = 0; | |
| if (buf + 3 >= next_avc) | |
| return next_avc - buf; | |
| while (buf + i + 3 < next_avc) { | |
| if (buf[i] == 0 && buf[i + 1] == 0 && buf[i + 2] == 1) | |
| break; | |
| i++; | |
| } | |
| return i + 3; | |
| } | |
| static void alloc_rbsp_buffer(H2645RBSP *rbsp, unsigned int size, int use_ref) | |
| { | |
| int min_size = size; | |
| if (size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) | |
| goto fail; | |
| size += AV_INPUT_BUFFER_PADDING_SIZE; | |
| if (rbsp->rbsp_buffer_alloc_size >= size && | |
| (!rbsp->rbsp_buffer_ref || av_buffer_is_writable(rbsp->rbsp_buffer_ref))) { | |
| av_assert0(rbsp->rbsp_buffer); | |
| memset(rbsp->rbsp_buffer + min_size, 0, AV_INPUT_BUFFER_PADDING_SIZE); | |
| return; | |
| } | |
| size = FFMIN(size + size / 16 + 32, INT_MAX); | |
| if (rbsp->rbsp_buffer_ref) | |
| av_buffer_unref(&rbsp->rbsp_buffer_ref); | |
| else | |
| av_free(rbsp->rbsp_buffer); | |
| rbsp->rbsp_buffer = av_mallocz(size); | |
| if (!rbsp->rbsp_buffer) | |
| goto fail; | |
| rbsp->rbsp_buffer_alloc_size = size; | |
| if (use_ref) { | |
| rbsp->rbsp_buffer_ref = av_buffer_create(rbsp->rbsp_buffer, size, | |
| NULL, NULL, 0); | |
| if (!rbsp->rbsp_buffer_ref) | |
| goto fail; | |
| } | |
| return; | |
| fail: | |
| rbsp->rbsp_buffer_alloc_size = 0; | |
| if (rbsp->rbsp_buffer_ref) { | |
| av_buffer_unref(&rbsp->rbsp_buffer_ref); | |
| rbsp->rbsp_buffer = NULL; | |
| } else | |
| av_freep(&rbsp->rbsp_buffer); | |
| return; | |
| } | |
| int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length, | |
| void *logctx, int is_nalff, int nal_length_size, | |
| enum AVCodecID codec_id, int small_padding, int use_ref) | |
| { | |
| GetByteContext bc; | |
| int consumed, ret = 0; | |
| int next_avc = is_nalff ? 0 : length; | |
| int64_t padding = small_padding ? 0 : MAX_MBPAIR_SIZE; | |
| bytestream2_init(&bc, buf, length); | |
| alloc_rbsp_buffer(&pkt->rbsp, length + padding, use_ref); | |
| if (!pkt->rbsp.rbsp_buffer) | |
| return AVERROR(ENOMEM); | |
| pkt->rbsp.rbsp_buffer_size = 0; | |
| pkt->nb_nals = 0; | |
| while (bytestream2_get_bytes_left(&bc) >= 4) { | |
| H2645NAL *nal; | |
| int extract_length = 0; | |
| int skip_trailing_zeros = 1; | |
| if (bytestream2_tell(&bc) == next_avc) { | |
| int i = 0; | |
| extract_length = get_nalsize(nal_length_size, | |
| bc.buffer, bytestream2_get_bytes_left(&bc), &i, logctx); | |
| if (extract_length < 0) | |
| return extract_length; | |
| bytestream2_skip(&bc, nal_length_size); | |
| next_avc = bytestream2_tell(&bc) + extract_length; | |
| } else { | |
| int buf_index; | |
| if (bytestream2_tell(&bc) > next_avc) | |
| av_log(logctx, AV_LOG_WARNING, "Exceeded next NALFF position, re-syncing.\n"); | |
| /* search start code */ | |
| buf_index = find_next_start_code(bc.buffer, buf + next_avc); | |
| bytestream2_skip(&bc, buf_index); | |
| if (!bytestream2_get_bytes_left(&bc)) { | |
| if (pkt->nb_nals > 0) { | |
| // No more start codes: we discarded some irrelevant | |
| // bytes at the end of the packet. | |
| return 0; | |
| } else { | |
| av_log(logctx, AV_LOG_ERROR, "No start code is found.\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| } | |
| extract_length = FFMIN(bytestream2_get_bytes_left(&bc), next_avc - bytestream2_tell(&bc)); | |
| if (bytestream2_tell(&bc) >= next_avc) { | |
| /* skip to the start of the next NAL */ | |
| bytestream2_skip(&bc, next_avc - bytestream2_tell(&bc)); | |
| continue; | |
| } | |
| } | |
| if (pkt->nals_allocated < pkt->nb_nals + 1) { | |
| int new_size = pkt->nals_allocated + 1; | |
| void *tmp; | |
| if (new_size >= INT_MAX / sizeof(*pkt->nals)) | |
| return AVERROR(ENOMEM); | |
| tmp = av_fast_realloc(pkt->nals, &pkt->nal_buffer_size, new_size * sizeof(*pkt->nals)); | |
| if (!tmp) | |
| return AVERROR(ENOMEM); | |
| pkt->nals = tmp; | |
| memset(pkt->nals + pkt->nals_allocated, 0, sizeof(*pkt->nals)); | |
| nal = &pkt->nals[pkt->nb_nals]; | |
| nal->skipped_bytes_pos_size = FFMIN(1024, extract_length/3+1); // initial buffer size | |
| nal->skipped_bytes_pos = av_malloc_array(nal->skipped_bytes_pos_size, sizeof(*nal->skipped_bytes_pos)); | |
| if (!nal->skipped_bytes_pos) | |
| return AVERROR(ENOMEM); | |
| pkt->nals_allocated = new_size; | |
| } | |
| nal = &pkt->nals[pkt->nb_nals]; | |
| consumed = ff_h2645_extract_rbsp(bc.buffer, extract_length, &pkt->rbsp, nal, small_padding); | |
| if (consumed < 0) | |
| return consumed; | |
| if (is_nalff && (extract_length != consumed) && extract_length) | |
| av_log(logctx, AV_LOG_DEBUG, | |
| "NALFF: Consumed only %d bytes instead of %d\n", | |
| consumed, extract_length); | |
| bytestream2_skip(&bc, consumed); | |
| /* see commit 3566042a0 */ | |
| if (bytestream2_get_bytes_left(&bc) >= 4 && | |
| bytestream2_peek_be32(&bc) == 0x000001E0) | |
| skip_trailing_zeros = 0; | |
| nal->size_bits = get_bit_length(nal, 1 + (codec_id == AV_CODEC_ID_HEVC), | |
| skip_trailing_zeros); | |
| if (nal->size <= 0 || nal->size_bits <= 0) | |
| continue; | |
| ret = init_get_bits(&nal->gb, nal->data, nal->size_bits); | |
| if (ret < 0) | |
| return ret; | |
| /* Reset type in case it contains a stale value from a previously parsed NAL */ | |
| nal->type = 0; | |
| if (codec_id == AV_CODEC_ID_VVC) | |
| ret = vvc_parse_nal_header(nal, logctx); | |
| else if (codec_id == AV_CODEC_ID_HEVC) { | |
| ret = hevc_parse_nal_header(nal, logctx); | |
| if (nal->nuh_layer_id == 63) | |
| continue; | |
| } else | |
| ret = h264_parse_nal_header(nal, logctx); | |
| if (ret < 0) { | |
| av_log(logctx, AV_LOG_WARNING, "Invalid NAL unit %d, skipping.\n", | |
| nal->type); | |
| continue; | |
| } | |
| pkt->nb_nals++; | |
| } | |
| return 0; | |
| } | |
| void ff_h2645_packet_uninit(H2645Packet *pkt) | |
| { | |
| int i; | |
| for (i = 0; i < pkt->nals_allocated; i++) { | |
| av_freep(&pkt->nals[i].skipped_bytes_pos); | |
| } | |
| av_freep(&pkt->nals); | |
| pkt->nals_allocated = pkt->nal_buffer_size = 0; | |
| if (pkt->rbsp.rbsp_buffer_ref) { | |
| av_buffer_unref(&pkt->rbsp.rbsp_buffer_ref); | |
| pkt->rbsp.rbsp_buffer = NULL; | |
| } else | |
| av_freep(&pkt->rbsp.rbsp_buffer); | |
| pkt->rbsp.rbsp_buffer_alloc_size = pkt->rbsp.rbsp_buffer_size = 0; | |
| } |