/* * Copyright (c) 2014 Martin Storsjo * Copyright (c) 2018 Akamai Technologies, Inc. * * 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 "libavutil/avstring.h" #include "libavutil/bprint.h" #include "libavutil/intreadwrite.h" #include "libavutil/mem.h" #include "libavutil/rational.h" #include "av1.h" #include "avc.h" #include "avformat.h" #include "internal.h" #include "nal.h" #include "vpcc.h" static const struct codec_string { enum AVCodecID id; char str[8]; } codecs[] = { { AV_CODEC_ID_VP8, "vp8" }, { AV_CODEC_ID_VP9, "vp9" }, { AV_CODEC_ID_VORBIS, "vorbis" }, { AV_CODEC_ID_OPUS, "opus" }, { AV_CODEC_ID_FLAC, "flac" }, { AV_CODEC_ID_NONE } }; static void set_vp9_codec_str(void *logctx, const AVCodecParameters *par, const AVRational *frame_rate, AVBPrint *out) { VPCC vpcc; int ret = ff_isom_get_vpcc_features(logctx, par, NULL, 0, frame_rate, &vpcc); if (ret == 0) { av_bprintf(out, "vp09.%02d.%02d.%02d", vpcc.profile, vpcc.level, vpcc.bitdepth); } else { // Default to just vp9 in case of error while finding out profile or level if (logctx) av_log(logctx, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n"); av_bprintf(out, "vp9"); } } int ff_make_codec_str(void *logctx, const AVCodecParameters *par, const AVRational *frame_rate, struct AVBPrint *out) { int i; // common Webm codecs are not part of RFC 6381 for (i = 0; codecs[i].id != AV_CODEC_ID_NONE; i++) if (codecs[i].id == par->codec_id) { if (codecs[i].id == AV_CODEC_ID_VP9) { set_vp9_codec_str(logctx, par, frame_rate, out); } else { av_bprintf(out, "%s", codecs[i].str); } return 0; } if (par->codec_id == AV_CODEC_ID_H264) { // RFC 6381 uint8_t *data = par->extradata; if (data) { const uint8_t *p; if (AV_RB32(data) == 0x01 && (data[4] & 0x1F) == 7) p = &data[5]; else if (AV_RB24(data) == 0x01 && (data[3] & 0x1F) == 7) p = &data[4]; else if (data[0] == 0x01) /* avcC */ p = &data[1]; else return AVERROR(EINVAL); av_bprintf(out, "avc1.%02x%02x%02x", p[0], p[1], p[2]); } else { return AVERROR(EINVAL); } } else if (par->codec_id == AV_CODEC_ID_HEVC) { // 3GPP TS 26.244 uint8_t *data = par->extradata; int profile = AV_PROFILE_UNKNOWN; uint32_t profile_compatibility = AV_PROFILE_UNKNOWN; char tier = 0; int level = AV_LEVEL_UNKNOWN; char constraints[8] = ""; if (par->profile != AV_PROFILE_UNKNOWN) profile = par->profile; if (par->level != AV_LEVEL_UNKNOWN) level = par->level; /* check the boundary of data which from current position is small than extradata_size */ while (data && (data - par->extradata + 19) < par->extradata_size) { /* get HEVC SPS NAL and seek to profile_tier_level */ if (!(data[0] | data[1] | data[2]) && data[3] == 1 && ((data[4] & 0x7E) == 0x42)) { uint8_t *rbsp_buf; int remain_size = 0; int rbsp_size = 0; uint32_t profile_compatibility_flags = 0; uint8_t high_nibble = 0; /* skip start code + nalu header */ data += 6; /* process by reference General NAL unit syntax */ remain_size = par->extradata_size - (data - par->extradata); rbsp_buf = ff_nal_unit_extract_rbsp(data, remain_size, &rbsp_size, 0); if (!rbsp_buf) return AVERROR(EINVAL); if (rbsp_size < 13) { av_freep(&rbsp_buf); break; } /* skip sps_video_parameter_set_id u(4), * sps_max_sub_layers_minus1 u(3), * and sps_temporal_id_nesting_flag u(1) * * TIER represents the general_tier_flag, with 'L' indicating the flag is 0, * and 'H' indicating the flag is 1 */ tier = (rbsp_buf[1] & 0x20) == 0 ? 'L' : 'H'; profile = rbsp_buf[1] & 0x1f; /* PROFILE_COMPATIBILITY is general_profile_compatibility_flags, but in reverse bit order, * in a hexadecimal representation (leading zeroes may be omitted). */ profile_compatibility_flags = AV_RB32(rbsp_buf + 2); /* revise these bits to get the profile compatibility value */ profile_compatibility_flags = ((profile_compatibility_flags & 0x55555555U) << 1) | ((profile_compatibility_flags >> 1) & 0x55555555U); profile_compatibility_flags = ((profile_compatibility_flags & 0x33333333U) << 2) | ((profile_compatibility_flags >> 2) & 0x33333333U); profile_compatibility_flags = ((profile_compatibility_flags & 0x0F0F0F0FU) << 4) | ((profile_compatibility_flags >> 4) & 0x0F0F0F0FU); profile_compatibility_flags = ((profile_compatibility_flags & 0x00FF00FFU) << 8) | ((profile_compatibility_flags >> 8) & 0x00FF00FFU); profile_compatibility = (profile_compatibility_flags << 16) | (profile_compatibility_flags >> 16); /* skip 8 + 8 + 32 * CONSTRAINTS is a hexadecimal representation of the general_constraint_indicator_flags. * each byte is separated by a '.', and trailing zero bytes may be omitted. * drop the trailing zero bytes refer to ISO/IEC14496-15. */ high_nibble = rbsp_buf[7] >> 4; snprintf(constraints, sizeof(constraints), high_nibble ? "%02x.%x" : "%02x", rbsp_buf[6], high_nibble); /* skip 8 + 8 + 32 + 4 + 43 + 1 bit */ level = rbsp_buf[12]; av_freep(&rbsp_buf); break; } data++; } if (par->codec_tag == MKTAG('h','v','c','1') && profile != AV_PROFILE_UNKNOWN && profile_compatibility != AV_PROFILE_UNKNOWN && tier != 0 && level != AV_LEVEL_UNKNOWN && constraints[0] != '\0') { av_bprintf(out, "%s.%d.%x.%c%d.%s", av_fourcc2str(par->codec_tag), profile, profile_compatibility, tier, level, constraints); } else return AVERROR(EINVAL); } else if (par->codec_id == AV_CODEC_ID_AV1) { // https://aomediacodec.github.io/av1-isobmff/#codecsparam AV1SequenceParameters seq; int err; if (!par->extradata_size) return AVERROR(EINVAL); if ((err = ff_av1_parse_seq_header(&seq, par->extradata, par->extradata_size)) < 0) return err; av_bprintf(out, "av01.%01u.%02u%s.%02u", seq.profile, seq.level, seq.tier ? "H" : "M", seq.bitdepth); if (seq.color_description_present_flag) av_bprintf(out, ".%01u.%01u%01u%01u.%02u.%02u.%02u.%01u", seq.monochrome, seq.chroma_subsampling_x, seq.chroma_subsampling_y, seq.chroma_sample_position, seq.color_primaries, seq.transfer_characteristics, seq.matrix_coefficients, seq.color_range); } else if (par->codec_id == AV_CODEC_ID_MPEG4) { // RFC 6381 av_bprintf(out, "mp4v.20"); // Unimplemented, should output ProfileLevelIndication as a decimal number if (logctx) av_log(logctx, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n"); } else if (par->codec_id == AV_CODEC_ID_MP2) { av_bprintf(out, "mp4a.40.33"); } else if (par->codec_id == AV_CODEC_ID_MP3) { av_bprintf(out, "mp4a.40.34"); } else if (par->codec_id == AV_CODEC_ID_AAC) { // RFC 6381 int aot = 2; if (par->extradata_size >= 2) { aot = par->extradata[0] >> 3; if (aot == 31) aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32; } else if (par->profile != AV_PROFILE_UNKNOWN) aot = par->profile + 1; av_bprintf(out, "mp4a.40.%d", aot); } else if (par->codec_id == AV_CODEC_ID_AC3) { av_bprintf(out, "ac-3"); } else if (par->codec_id == AV_CODEC_ID_EAC3) { av_bprintf(out, "ec-3"); } else { return AVERROR(EINVAL); } return 0; } int av_mime_codec_str(const AVCodecParameters *par, AVRational frame_rate, struct AVBPrint *out) { return ff_make_codec_str(NULL, par, &frame_rate, out); }