blob: 6c1138e015f1152e2c4339a773ac6575c1bacebb
| 1 | /* |
| 2 | * This file is part of FFmpeg. |
| 3 | * |
| 4 | * FFmpeg is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 2.1 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * FFmpeg is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with FFmpeg; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | #include "bytestream.h" |
| 20 | #include "h2645_parse.h" |
| 21 | #include "hevc.h" |
| 22 | #include "hevc_parse.h" |
| 23 | |
| 24 | static int hevc_decode_nal_units(const uint8_t *buf, int buf_size, HEVCParamSets *ps, |
| 25 | int is_nalff, int nal_length_size, void *logctx) |
| 26 | { |
| 27 | int i; |
| 28 | int ret = 0; |
| 29 | H2645Packet pkt = { 0 }; |
| 30 | |
| 31 | ret = ff_h2645_packet_split(&pkt, buf, buf_size, logctx, is_nalff, nal_length_size, AV_CODEC_ID_HEVC, 1); |
| 32 | if (ret < 0) { |
| 33 | goto done; |
| 34 | } |
| 35 | |
| 36 | for (i = 0; i < pkt.nb_nals; i++) { |
| 37 | H2645NAL *nal = &pkt.nals[i]; |
| 38 | |
| 39 | /* ignore everything except parameter sets and VCL NALUs */ |
| 40 | switch (nal->type) { |
| 41 | case HEVC_NAL_VPS: ff_hevc_decode_nal_vps(&nal->gb, logctx, ps); break; |
| 42 | case HEVC_NAL_SPS: ff_hevc_decode_nal_sps(&nal->gb, logctx, ps, 1); break; |
| 43 | case HEVC_NAL_PPS: ff_hevc_decode_nal_pps(&nal->gb, logctx, ps); break; |
| 44 | case HEVC_NAL_TRAIL_R: |
| 45 | case HEVC_NAL_TRAIL_N: |
| 46 | case HEVC_NAL_TSA_N: |
| 47 | case HEVC_NAL_TSA_R: |
| 48 | case HEVC_NAL_STSA_N: |
| 49 | case HEVC_NAL_STSA_R: |
| 50 | case HEVC_NAL_BLA_W_LP: |
| 51 | case HEVC_NAL_BLA_W_RADL: |
| 52 | case HEVC_NAL_BLA_N_LP: |
| 53 | case HEVC_NAL_IDR_W_RADL: |
| 54 | case HEVC_NAL_IDR_N_LP: |
| 55 | case HEVC_NAL_CRA_NUT: |
| 56 | case HEVC_NAL_RADL_N: |
| 57 | case HEVC_NAL_RADL_R: |
| 58 | case HEVC_NAL_RASL_N: |
| 59 | case HEVC_NAL_RASL_R: |
| 60 | av_log(logctx, AV_LOG_ERROR, "Invalid NAL unit: %d\n", nal->type); |
| 61 | ret = AVERROR_INVALIDDATA; |
| 62 | goto done; |
| 63 | break; |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | done: |
| 68 | ff_h2645_packet_uninit(&pkt); |
| 69 | return ret; |
| 70 | } |
| 71 | |
| 72 | int ff_hevc_decode_extradata(const uint8_t *data, int size, HEVCParamSets *ps, |
| 73 | int *is_nalff, int *nal_length_size, |
| 74 | int err_recognition, void *logctx) |
| 75 | { |
| 76 | int ret = 0; |
| 77 | GetByteContext gb; |
| 78 | |
| 79 | bytestream2_init(&gb, data, size); |
| 80 | |
| 81 | if (size > 3 && (data[0] || data[1] || data[2] > 1)) { |
| 82 | /* It seems the extradata is encoded as hvcC format. |
| 83 | * Temporarily, we support configurationVersion==0 until 14496-15 3rd |
| 84 | * is finalized. When finalized, configurationVersion will be 1 and we |
| 85 | * can recognize hvcC by checking if avctx->extradata[0]==1 or not. */ |
| 86 | int i, j, num_arrays, nal_len_size; |
| 87 | |
| 88 | *is_nalff = 1; |
| 89 | |
| 90 | bytestream2_skip(&gb, 21); |
| 91 | nal_len_size = (bytestream2_get_byte(&gb) & 3) + 1; |
| 92 | num_arrays = bytestream2_get_byte(&gb); |
| 93 | |
| 94 | /* nal units in the hvcC always have length coded with 2 bytes, |
| 95 | * so put a fake nal_length_size = 2 while parsing them */ |
| 96 | *nal_length_size = 2; |
| 97 | |
| 98 | /* Decode nal units from hvcC. */ |
| 99 | for (i = 0; i < num_arrays; i++) { |
| 100 | int type = bytestream2_get_byte(&gb) & 0x3f; |
| 101 | int cnt = bytestream2_get_be16(&gb); |
| 102 | |
| 103 | for (j = 0; j < cnt; j++) { |
| 104 | // +2 for the nal size field |
| 105 | int nalsize = bytestream2_peek_be16(&gb) + 2; |
| 106 | if (bytestream2_get_bytes_left(&gb) < nalsize) { |
| 107 | av_log(logctx, AV_LOG_ERROR, |
| 108 | "Invalid NAL unit size in extradata.\n"); |
| 109 | return AVERROR_INVALIDDATA; |
| 110 | } |
| 111 | |
| 112 | ret = hevc_decode_nal_units(gb.buffer, nalsize, ps, *is_nalff, *nal_length_size, logctx); |
| 113 | if (ret < 0) { |
| 114 | av_log(logctx, AV_LOG_ERROR, |
| 115 | "Decoding nal unit %d %d from hvcC failed\n", |
| 116 | type, i); |
| 117 | return ret; |
| 118 | } |
| 119 | bytestream2_skip(&gb, nalsize); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | /* Now store right nal length size, that will be used to parse |
| 124 | * all other nals */ |
| 125 | *nal_length_size = nal_len_size; |
| 126 | } else { |
| 127 | *is_nalff = 0; |
| 128 | ret = hevc_decode_nal_units(data, size, ps, *is_nalff, *nal_length_size, logctx); |
| 129 | if (ret < 0) |
| 130 | return ret; |
| 131 | } |
| 132 | |
| 133 | return ret; |
| 134 | } |
| 135 |