| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "media/base/video_codecs.h" |
| |
| #include "base/logging.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/strings/string_split.h" |
| #include "base/strings/string_util.h" |
| #include "media/base/video_color_space.h" |
| |
| namespace media { |
| |
| // The names come from src/third_party/ffmpeg/libavcodec/codec_desc.c |
| std::string GetCodecName(VideoCodec codec) { |
| switch (codec) { |
| case kUnknownVideoCodec: |
| return "unknown"; |
| case kCodecH264: |
| return "h264"; |
| case kCodecHEVC: |
| return "hevc"; |
| case kCodecDolbyVision: |
| return "dolbyvision"; |
| case kCodecVC1: |
| return "vc1"; |
| case kCodecMPEG2: |
| return "mpeg2video"; |
| case kCodecMPEG4: |
| return "mpeg4"; |
| case kCodecTheora: |
| return "theora"; |
| case kCodecVP8: |
| return "vp8"; |
| case kCodecVP9: |
| return "vp9"; |
| case kCodecAV1: |
| return "av1"; |
| } |
| NOTREACHED(); |
| return ""; |
| } |
| |
| std::string GetProfileName(VideoCodecProfile profile) { |
| switch (profile) { |
| case VIDEO_CODEC_PROFILE_UNKNOWN: |
| return "unknown"; |
| case H264PROFILE_BASELINE: |
| return "h264 baseline"; |
| case H264PROFILE_MAIN: |
| return "h264 main"; |
| case H264PROFILE_EXTENDED: |
| return "h264 extended"; |
| case H264PROFILE_HIGH: |
| return "h264 high"; |
| case H264PROFILE_HIGH10PROFILE: |
| return "h264 high 10"; |
| case H264PROFILE_HIGH422PROFILE: |
| return "h264 high 4:2:2"; |
| case H264PROFILE_HIGH444PREDICTIVEPROFILE: |
| return "h264 high 4:4:4 predictive"; |
| case H264PROFILE_SCALABLEBASELINE: |
| return "h264 scalable baseline"; |
| case H264PROFILE_SCALABLEHIGH: |
| return "h264 scalable high"; |
| case H264PROFILE_STEREOHIGH: |
| return "h264 stereo high"; |
| case H264PROFILE_MULTIVIEWHIGH: |
| return "h264 multiview high"; |
| case HEVCPROFILE_MAIN: |
| return "hevc main"; |
| case HEVCPROFILE_MAIN10: |
| return "hevc main 10"; |
| case HEVCPROFILE_MAIN_STILL_PICTURE: |
| return "hevc main still-picture"; |
| case VP8PROFILE_ANY: |
| return "vp8"; |
| case VP9PROFILE_PROFILE0: |
| return "vp9 profile0"; |
| case VP9PROFILE_PROFILE1: |
| return "vp9 profile1"; |
| case VP9PROFILE_PROFILE2: |
| return "vp9 profile2"; |
| case VP9PROFILE_PROFILE3: |
| return "vp9 profile3"; |
| case DOLBYVISION_PROFILE0: |
| return "dolby vision profile 0"; |
| case DOLBYVISION_PROFILE4: |
| return "dolby vision profile 4"; |
| case DOLBYVISION_PROFILE5: |
| return "dolby vision profile 5"; |
| case DOLBYVISION_PROFILE7: |
| return "dolby vision profile 7"; |
| case DOLBYVISION_PROFILE8: |
| return "dolby vision profile 8"; |
| case DOLBYVISION_PROFILE9: |
| return "dolby vision profile 9"; |
| case THEORAPROFILE_ANY: |
| return "theora"; |
| case AV1PROFILE_PROFILE_MAIN: |
| return "av1 profile main"; |
| case AV1PROFILE_PROFILE_HIGH: |
| return "av1 profile high"; |
| case AV1PROFILE_PROFILE_PRO: |
| return "av1 profile pro"; |
| } |
| NOTREACHED(); |
| return ""; |
| } |
| |
| bool ParseNewStyleVp9CodecID(const std::string& codec_id, |
| VideoCodecProfile* profile, |
| uint8_t* level_idc, |
| VideoColorSpace* color_space) { |
| // Initialize optional fields to their defaults. |
| *color_space = VideoColorSpace::REC709(); |
| |
| std::vector<std::string> fields = base::SplitString( |
| codec_id, ".", base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL); |
| |
| // First four fields are mandatory. No more than 9 fields are expected. |
| if (fields.size() < 4 || fields.size() > 9) { |
| DVLOG(3) << __func__ << " Invalid number of fields (" << fields.size() |
| << ")"; |
| return false; |
| } |
| |
| if (fields[0] != "vp09") { |
| DVLOG(3) << __func__ << " Invalid 4CC (" << fields[0] << ")"; |
| return false; |
| } |
| |
| std::vector<int> values; |
| for (size_t i = 1; i < fields.size(); ++i) { |
| // Missing value is not allowed. |
| if (fields[i] == "") { |
| DVLOG(3) << __func__ << " Invalid missing field (position:" << i << ")"; |
| return false; |
| } |
| int value; |
| if (!base::StringToInt(fields[i], &value) || value < 0) { |
| DVLOG(3) << __func__ << " Invalid field value (" << value << ")"; |
| return false; |
| } |
| values.push_back(value); |
| } |
| |
| const int profile_idc = values[0]; |
| switch (profile_idc) { |
| case 0: |
| *profile = VP9PROFILE_PROFILE0; |
| break; |
| case 1: |
| *profile = VP9PROFILE_PROFILE1; |
| break; |
| case 2: |
| *profile = VP9PROFILE_PROFILE2; |
| break; |
| case 3: |
| *profile = VP9PROFILE_PROFILE3; |
| break; |
| default: |
| DVLOG(3) << __func__ << " Invalid profile (" << profile_idc << ")"; |
| return false; |
| } |
| |
| *level_idc = values[1]; |
| switch (*level_idc) { |
| case 10: |
| case 11: |
| case 20: |
| case 21: |
| case 30: |
| case 31: |
| case 40: |
| case 41: |
| case 50: |
| case 51: |
| case 52: |
| case 60: |
| case 61: |
| case 62: |
| break; |
| default: |
| DVLOG(3) << __func__ << " Invalid level (" << *level_idc << ")"; |
| return false; |
| } |
| |
| const int bit_depth = values[2]; |
| if (bit_depth != 8 && bit_depth != 10 && bit_depth != 12) { |
| DVLOG(3) << __func__ << " Invalid bit-depth (" << bit_depth << ")"; |
| return false; |
| } |
| |
| if (values.size() < 4) |
| return true; |
| const int chroma_subsampling = values[3]; |
| if (chroma_subsampling > 3) { |
| DVLOG(3) << __func__ << " Invalid chroma subsampling (" |
| << chroma_subsampling << ")"; |
| return false; |
| } |
| |
| if (values.size() < 5) |
| return true; |
| color_space->primaries = VideoColorSpace::GetPrimaryID(values[4]); |
| if (color_space->primaries == VideoColorSpace::PrimaryID::INVALID) { |
| DVLOG(3) << __func__ << " Invalid color primaries (" << values[4] << ")"; |
| return false; |
| } |
| |
| if (values.size() < 6) |
| return true; |
| color_space->transfer = VideoColorSpace::GetTransferID(values[5]); |
| if (color_space->transfer == VideoColorSpace::TransferID::INVALID) { |
| DVLOG(3) << __func__ << " Invalid transfer function (" << values[5] << ")"; |
| return false; |
| } |
| |
| if (values.size() < 7) |
| return true; |
| color_space->matrix = VideoColorSpace::GetMatrixID(values[6]); |
| if (color_space->matrix == VideoColorSpace::MatrixID::INVALID) { |
| DVLOG(3) << __func__ << " Invalid matrix coefficients (" << values[6] |
| << ")"; |
| return false; |
| } |
| if (color_space->matrix == VideoColorSpace::MatrixID::RGB && |
| chroma_subsampling != 3) { |
| DVLOG(3) << __func__ << " Invalid combination of chroma_subsampling (" |
| << ") and matrix coefficients (" << values[6] << ")"; |
| } |
| |
| if (values.size() < 8) |
| return true; |
| const int video_full_range_flag = values[7]; |
| if (video_full_range_flag > 1) { |
| DVLOG(3) << __func__ << " Invalid full range flag (" |
| << video_full_range_flag << ")"; |
| return false; |
| } |
| color_space->range = video_full_range_flag == 1 |
| ? gfx::ColorSpace::RangeID::FULL |
| : gfx::ColorSpace::RangeID::LIMITED; |
| |
| return true; |
| } |
| |
| bool ParseLegacyVp9CodecID(const std::string& codec_id, |
| VideoCodecProfile* profile, |
| uint8_t* level_idc) { |
| if (codec_id == "vp9" || codec_id == "vp9.0") { |
| // Profile is not included in the codec string. Consumers of parsed codec |
| // should handle by rejecting ambiguous string or resolving to a default |
| // profile. |
| *profile = VIDEO_CODEC_PROFILE_UNKNOWN; |
| // Use 0 to indicate unknown level. |
| *level_idc = 0; |
| return true; |
| } |
| return false; |
| } |
| |
| #if BUILDFLAG(ENABLE_AV1_DECODER) |
| bool ParseAv1CodecId(const std::string& codec_id, |
| VideoCodecProfile* profile, |
| uint8_t* level_idc, |
| VideoColorSpace* color_space) { |
| // The codecs parameter string for the AOM AV1 codec is as follows: |
| // See https://aomediacodec.github.io/av1-isobmff/#codecsparam. |
| // |
| // <sample entry4CC>.<profile>.<level><tier>.<bitDepth>.<monochrome>. |
| // <chromaSubsampling>.<colorPrimaries>.<transferCharacteristics>. |
| // <matrixCoefficients>.<videoFullRangeFlag> |
| |
| std::vector<std::string> fields = base::SplitString( |
| codec_id, ".", base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL); |
| |
| // The parameters sample entry 4CC, profile, level, tier, and bitDepth are all |
| // mandatory fields. If any of these fields are empty, or not within their |
| // allowed range, the processing device SHOULD treat it as an error. |
| if (fields.size() < 4 || fields.size() > 10) { |
| DVLOG(3) << __func__ << " Invalid number of fields (" << fields.size() |
| << ")"; |
| return false; |
| } |
| |
| // All the other fields (including their leading '.') are optional, mutually |
| // inclusive (all or none) fields. If not specified then the values listed in |
| // the table below are assumed. |
| // |
| // mono_chrome 0 |
| // chromaSubsampling 112 (4:2:0 colocated with luma (0,0)) |
| // colorPrimaries 1 (ITU-R BT.709) |
| // transferCharacteristics 1 (ITU-R BT.709) |
| // matrixCoefficients 1 (ITU-R BT.709) |
| // videoFullRangeFlag 0 (studio swing representation) |
| *color_space = VideoColorSpace::REC709(); |
| |
| if (fields[0] != "av01") { |
| DVLOG(3) << __func__ << " Invalid AV1 4CC (" << fields[0] << ")"; |
| return false; |
| } |
| |
| // The level parameter value SHALL equal the first level value indicated by |
| // seq_level_idx in the Sequence Header. The tier parameter value SHALL be |
| // equal to M when the first seq_tier value in the Sequence Header is equal to |
| // 0, and H when it is equal to 1. |
| if (fields[2].size() != 3 || (fields[2][2] != 'M' && fields[2][2] != 'H')) { |
| DVLOG(3) << __func__ << " Invalid level+tier (" << fields[2] << ")"; |
| return false; |
| } |
| |
| // Since tier has been validated, strip the trailing tier indicator to allow |
| // int conversion below. |
| fields[2].resize(2); |
| |
| // Fill with dummy values to ensure parallel indices with fields. |
| std::vector<int> values(fields.size(), 0); |
| for (size_t i = 1; i < fields.size(); ++i) { |
| if (fields[i].empty()) { |
| DVLOG(3) << __func__ << " Invalid empty field (position:" << i << ")"; |
| return false; |
| } |
| |
| if (!base::StringToInt(fields[i], &values[i]) || values[i] < 0) { |
| DVLOG(3) << __func__ << " Invalid field value (" << values[i] << ")"; |
| return false; |
| } |
| } |
| |
| // The profile parameter value, represented by a single digit decimal, SHALL |
| // equal the value of seq_profile in the Sequence Header. |
| const int profile_idc = fields[1].size() == 1 ? values[1] : -1; |
| switch (profile_idc) { |
| case 0: |
| *profile = AV1PROFILE_PROFILE_MAIN; |
| break; |
| case 1: |
| *profile = AV1PROFILE_PROFILE_HIGH; |
| break; |
| case 2: |
| *profile = AV1PROFILE_PROFILE_PRO; |
| break; |
| default: |
| DVLOG(3) << __func__ << " Invalid profile (" << fields[1] << ")"; |
| return false; |
| } |
| |
| // The level parameter value SHALL equal the first level value indicated by |
| // seq_level_idx in the Sequence Header. Note: We validate that this field has |
| // the required leading zeros above. |
| *level_idc = values[2]; |
| if (*level_idc > 31) { |
| DVLOG(3) << __func__ << " Invalid level (" << *level_idc << ")"; |
| return false; |
| } |
| |
| // The bitDepth parameter value SHALL equal the value of BitDepth variable as |
| // defined in [AV1] derived from the Sequence Header. Leading zeros required. |
| const int bit_depth = values[3]; |
| if (fields[3].size() != 2 || |
| (bit_depth != 8 && bit_depth != 10 && bit_depth != 12)) { |
| DVLOG(3) << __func__ << " Invalid bit-depth (" << fields[3] << ")"; |
| return false; |
| } |
| |
| if (values.size() <= 4) |
| return true; |
| |
| // The monochrome parameter value, represented by a single digit decimal, |
| // SHALL equal the value of mono_chrome in the Sequence Header. |
| const int monochrome = values[4]; |
| if (fields[4].size() != 1 || monochrome > 1) { |
| DVLOG(3) << __func__ << " Invalid monochrome (" << fields[4] << ")"; |
| return false; |
| } |
| |
| if (values.size() <= 5) |
| return true; |
| |
| // The chromaSubsampling parameter value, represented by a three-digit |
| // decimal, SHALL have its first digit equal to subsampling_x and its second |
| // digit equal to subsampling_y. If both subsampling_x and subsampling_y are |
| // set to 1, then the third digit SHALL be equal to chroma_sample_position, |
| // otherwise it SHALL be set to 0. |
| if (fields[5].size() != 3) { |
| DVLOG(3) << __func__ << " Invalid chroma subsampling (" << fields[5] << ")"; |
| return false; |
| } |
| |
| const char subsampling_x = fields[5][0]; |
| const char subsampling_y = fields[5][1]; |
| const char chroma_sample_position = fields[5][2]; |
| if ((subsampling_x < '0' || subsampling_x > '1') || |
| (subsampling_y < '0' || subsampling_y > '1') || |
| (chroma_sample_position < '0' || chroma_sample_position > '3')) { |
| DVLOG(3) << __func__ << " Invalid chroma subsampling (" << fields[5] << ")"; |
| return false; |
| } |
| |
| if (((subsampling_x == '0' || subsampling_y == '0') && |
| chroma_sample_position != '0')) { |
| DVLOG(3) << __func__ << " Invalid chroma subsampling (" << fields[5] << ")"; |
| return false; |
| } |
| |
| if (values.size() <= 6) |
| return true; |
| |
| // The colorPrimaries, transferCharacteristics, matrixCoefficients and |
| // videoFullRangeFlag parameter values SHALL equal the value of matching |
| // fields in the Sequence Header, if color_description_present_flag is set to |
| // 1, otherwise they SHOULD not be set, defaulting to the values below. The |
| // videoFullRangeFlag is represented by a single digit. |
| color_space->primaries = VideoColorSpace::GetPrimaryID(values[6]); |
| if (fields[6].size() != 2 || |
| color_space->primaries == VideoColorSpace::PrimaryID::INVALID) { |
| DVLOG(3) << __func__ << " Invalid color primaries (" << fields[6] << ")"; |
| return false; |
| } |
| |
| if (values.size() <= 7) |
| return true; |
| |
| color_space->transfer = VideoColorSpace::GetTransferID(values[7]); |
| if (fields[7].size() != 2 || |
| color_space->transfer == VideoColorSpace::TransferID::INVALID) { |
| DVLOG(3) << __func__ << " Invalid transfer function (" << fields[7] << ")"; |
| return false; |
| } |
| |
| if (values.size() <= 8) |
| return true; |
| |
| color_space->matrix = VideoColorSpace::GetMatrixID(values[8]); |
| if (fields[8].size() != 2 || |
| color_space->matrix == VideoColorSpace::MatrixID::INVALID) { |
| // TODO(dalecurtis): AV1 allows a few matrices we don't support yet. |
| // https://crbug.com/854290 |
| if (values[8] == 12 || values[8] == 13 || values[8] == 14) { |
| DVLOG(3) << __func__ << " Unsupported matrix coefficients (" << fields[8] |
| << ")"; |
| } else { |
| DVLOG(3) << __func__ << " Invalid matrix coefficients (" << fields[8] |
| << ")"; |
| } |
| return false; |
| } |
| |
| if (values.size() <= 9) |
| return true; |
| |
| const int video_full_range_flag = values[9]; |
| if (fields[9].size() != 1 || video_full_range_flag > 1) { |
| DVLOG(3) << __func__ << " Invalid full range flag (" << fields[9] << ")"; |
| return false; |
| } |
| color_space->range = video_full_range_flag == 1 |
| ? gfx::ColorSpace::RangeID::FULL |
| : gfx::ColorSpace::RangeID::LIMITED; |
| |
| return true; |
| } |
| #endif // BUILDFLAG(ENABLE_AV1_DECODER) |
| |
| bool ParseAVCCodecId(const std::string& codec_id, |
| VideoCodecProfile* profile, |
| uint8_t* level_idc) { |
| // Make sure we have avc1.xxxxxx or avc3.xxxxxx , where xxxxxx are hex digits |
| if (!base::StartsWith(codec_id, "avc1.", base::CompareCase::SENSITIVE) && |
| !base::StartsWith(codec_id, "avc3.", base::CompareCase::SENSITIVE)) { |
| return false; |
| } |
| uint32_t elem = 0; |
| if (codec_id.size() != 11 || |
| !base::HexStringToUInt(base::StringPiece(codec_id).substr(5), &elem)) { |
| DVLOG(4) << __func__ << ": invalid avc codec id (" << codec_id << ")"; |
| return false; |
| } |
| |
| uint8_t level_byte = elem & 0xFF; |
| uint8_t constraints_byte = (elem >> 8) & 0xFF; |
| uint8_t profile_idc = (elem >> 16) & 0xFF; |
| |
| // Check that the lower two bits of |constraints_byte| are zero (those are |
| // reserved and must be zero according to ISO IEC 14496-10). |
| if (constraints_byte & 3) { |
| DVLOG(4) << __func__ << ": non-zero reserved bits in codec id " << codec_id; |
| return false; |
| } |
| |
| VideoCodecProfile out_profile = VIDEO_CODEC_PROFILE_UNKNOWN; |
| // profile_idc values for each profile are taken from ISO IEC 14496-10 and |
| // https://en.wikipedia.org/wiki/H.264/MPEG-4_AVC#Profiles |
| switch (profile_idc) { |
| case 66: |
| out_profile = H264PROFILE_BASELINE; |
| break; |
| case 77: |
| out_profile = H264PROFILE_MAIN; |
| break; |
| case 83: |
| out_profile = H264PROFILE_SCALABLEBASELINE; |
| break; |
| case 86: |
| out_profile = H264PROFILE_SCALABLEHIGH; |
| break; |
| case 88: |
| out_profile = H264PROFILE_EXTENDED; |
| break; |
| case 100: |
| out_profile = H264PROFILE_HIGH; |
| break; |
| case 110: |
| out_profile = H264PROFILE_HIGH10PROFILE; |
| break; |
| case 118: |
| out_profile = H264PROFILE_MULTIVIEWHIGH; |
| break; |
| case 122: |
| out_profile = H264PROFILE_HIGH422PROFILE; |
| break; |
| case 128: |
| out_profile = H264PROFILE_STEREOHIGH; |
| break; |
| case 244: |
| out_profile = H264PROFILE_HIGH444PREDICTIVEPROFILE; |
| break; |
| default: |
| DVLOG(1) << "Warning: unrecognized AVC/H.264 profile " << profile_idc; |
| return false; |
| } |
| |
| // TODO(servolk): Take into account also constraint set flags 3 through 5. |
| uint8_t constraint_set0_flag = (constraints_byte >> 7) & 1; |
| uint8_t constraint_set1_flag = (constraints_byte >> 6) & 1; |
| uint8_t constraint_set2_flag = (constraints_byte >> 5) & 1; |
| if (constraint_set2_flag && out_profile > H264PROFILE_EXTENDED) { |
| out_profile = H264PROFILE_EXTENDED; |
| } |
| if (constraint_set1_flag && out_profile > H264PROFILE_MAIN) { |
| out_profile = H264PROFILE_MAIN; |
| } |
| if (constraint_set0_flag && out_profile > H264PROFILE_BASELINE) { |
| out_profile = H264PROFILE_BASELINE; |
| } |
| |
| if (level_idc) |
| *level_idc = level_byte; |
| |
| if (profile) |
| *profile = out_profile; |
| |
| return true; |
| } |
| |
| #if BUILDFLAG(ENABLE_MSE_MPEG2TS_STREAM_PARSER) |
| static const char kHexString[] = "0123456789ABCDEF"; |
| static char IntToHex(int i) { |
| DCHECK_GE(i, 0) << i << " not a hex value"; |
| DCHECK_LE(i, 15) << i << " not a hex value"; |
| return kHexString[i]; |
| } |
| |
| std::string TranslateLegacyAvc1CodecIds(const std::string& codec_id) { |
| // Special handling for old, pre-RFC 6381 format avc1 strings, which are still |
| // being used by some HLS apps to preserve backward compatibility with older |
| // iOS devices. The old format was avc1.<profile>.<level> |
| // Where <profile> is H.264 profile_idc encoded as a decimal number, i.e. |
| // 66 is baseline profile (0x42) |
| // 77 is main profile (0x4d) |
| // 100 is high profile (0x64) |
| // And <level> is H.264 level multiplied by 10, also encoded as decimal number |
| // E.g. <level> 31 corresponds to H.264 level 3.1 |
| // See, for example, http://qtdevseed.apple.com/qadrift/testcases/tc-0133.php |
| uint32_t level_start = 0; |
| std::string result; |
| if (base::StartsWith(codec_id, "avc1.66.", base::CompareCase::SENSITIVE)) { |
| level_start = 8; |
| result = "avc1.4200"; |
| } else if (base::StartsWith(codec_id, "avc1.77.", |
| base::CompareCase::SENSITIVE)) { |
| level_start = 8; |
| result = "avc1.4D00"; |
| } else if (base::StartsWith(codec_id, "avc1.100.", |
| base::CompareCase::SENSITIVE)) { |
| level_start = 9; |
| result = "avc1.6400"; |
| } |
| |
| uint32_t level = 0; |
| if (level_start > 0 && |
| base::StringToUint(codec_id.substr(level_start), &level) && level < 256) { |
| // This is a valid legacy avc1 codec id - return the codec id translated |
| // into RFC 6381 format. |
| result.push_back(IntToHex(level >> 4)); |
| result.push_back(IntToHex(level & 0xf)); |
| return result; |
| } |
| |
| // This is not a valid legacy avc1 codec id - return the original codec id. |
| return codec_id; |
| } |
| #endif |
| |
| #if BUILDFLAG(ENABLE_HEVC_DEMUXING) |
| // The specification for HEVC codec id strings can be found in ISO IEC 14496-15 |
| // dated 2012 or newer in the Annex E.3 |
| bool ParseHEVCCodecId(const std::string& codec_id, |
| VideoCodecProfile* profile, |
| uint8_t* level_idc) { |
| if (!base::StartsWith(codec_id, "hev1.", base::CompareCase::SENSITIVE) && |
| !base::StartsWith(codec_id, "hvc1.", base::CompareCase::SENSITIVE)) { |
| return false; |
| } |
| |
| // HEVC codec id consists of: |
| const int kMaxHevcCodecIdLength = |
| 5 + // 'hev1.' or 'hvc1.' prefix (5 chars) |
| 4 + // profile, e.g. '.A12' (max 4 chars) |
| 9 + // profile_compatibility, dot + 32-bit hex number (max 9 chars) |
| 5 + // tier and level, e.g. '.H120' (max 5 chars) |
| 18; // up to 6 constraint bytes, bytes are dot-separated and hex-encoded. |
| |
| if (codec_id.size() > kMaxHevcCodecIdLength) { |
| DVLOG(4) << __func__ << ": Codec id is too long (" << codec_id << ")"; |
| return false; |
| } |
| |
| std::vector<std::string> elem = base::SplitString( |
| codec_id, ".", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL); |
| DCHECK(elem[0] == "hev1" || elem[0] == "hvc1"); |
| |
| if (elem.size() < 4) { |
| DVLOG(4) << __func__ << ": invalid HEVC codec id " << codec_id; |
| return false; |
| } |
| |
| uint8_t general_profile_space = 0; |
| if (elem[1].size() > 0 && |
| (elem[1][0] == 'A' || elem[1][0] == 'B' || elem[1][0] == 'C')) { |
| general_profile_space = 1 + (elem[1][0] - 'A'); |
| elem[1].erase(0, 1); |
| } |
| DCHECK(general_profile_space >= 0 && general_profile_space <= 3); |
| |
| unsigned general_profile_idc = 0; |
| if (!base::StringToUint(elem[1], &general_profile_idc) || |
| general_profile_idc > 0x1f) { |
| DVLOG(4) << __func__ << ": invalid general_profile_idc=" << elem[1]; |
| return false; |
| } |
| |
| uint32_t general_profile_compatibility_flags = 0; |
| if (!base::HexStringToUInt(elem[2], &general_profile_compatibility_flags)) { |
| DVLOG(4) << __func__ |
| << ": invalid general_profile_compatibility_flags=" << elem[2]; |
| return false; |
| } |
| |
| if (profile) { |
| // TODO(servolk): Handle format range extension profiles as explained in |
| // HEVC standard (ISO/IEC ISO/IEC 23008-2) section A.3.5 |
| if (general_profile_idc == 3 || (general_profile_compatibility_flags & 4)) { |
| *profile = HEVCPROFILE_MAIN_STILL_PICTURE; |
| } |
| if (general_profile_idc == 2 || (general_profile_compatibility_flags & 2)) { |
| *profile = HEVCPROFILE_MAIN10; |
| } |
| if (general_profile_idc == 1 || (general_profile_compatibility_flags & 1)) { |
| *profile = HEVCPROFILE_MAIN; |
| } |
| } |
| |
| uint8_t general_tier_flag; |
| if (elem[3].size() > 0 && (elem[3][0] == 'L' || elem[3][0] == 'H')) { |
| general_tier_flag = (elem[3][0] == 'L') ? 0 : 1; |
| elem[3].erase(0, 1); |
| } else { |
| DVLOG(4) << __func__ << ": invalid general_tier_flag=" << elem[3]; |
| return false; |
| } |
| DCHECK(general_tier_flag == 0 || general_tier_flag == 1); |
| |
| unsigned general_level_idc = 0; |
| if (!base::StringToUint(elem[3], &general_level_idc) || |
| general_level_idc > 0xff) { |
| DVLOG(4) << __func__ << ": invalid general_level_idc=" << elem[3]; |
| return false; |
| } |
| |
| if (level_idc) |
| *level_idc = static_cast<uint8_t>(general_level_idc); |
| |
| uint8_t constraint_flags[6]; |
| memset(constraint_flags, 0, sizeof(constraint_flags)); |
| |
| if (elem.size() > 10) { |
| DVLOG(4) << __func__ << ": unexpected number of trailing bytes in HEVC " |
| << "codec id " << codec_id; |
| return false; |
| } |
| for (size_t i = 4; i < elem.size(); ++i) { |
| unsigned constr_byte = 0; |
| if (!base::HexStringToUInt(elem[i], &constr_byte) || constr_byte > 0xFF) { |
| DVLOG(4) << __func__ << ": invalid constraint byte=" << elem[i]; |
| return false; |
| } |
| constraint_flags[i - 4] = constr_byte; |
| } |
| |
| return true; |
| } |
| #endif |
| |
| #if BUILDFLAG(ENABLE_DOLBY_VISION_DEMUXING) |
| bool IsDolbyVisionAVCCodecId(const std::string& codec_id) { |
| return base::StartsWith(codec_id, "dva1.", base::CompareCase::SENSITIVE) || |
| base::StartsWith(codec_id, "dvav.", base::CompareCase::SENSITIVE); |
| } |
| |
| bool IsDolbyVisionHEVCCodecId(const std::string& codec_id) { |
| return base::StartsWith(codec_id, "dvh1.", base::CompareCase::SENSITIVE) || |
| base::StartsWith(codec_id, "dvhe.", base::CompareCase::SENSITIVE); |
| } |
| |
| // The specification for Dolby Vision codec id strings can be found in Dolby |
| // Vision streams within the MPEG-DASH format. |
| bool ParseDolbyVisionCodecId(const std::string& codec_id, |
| VideoCodecProfile* profile, |
| uint8_t* level_idc) { |
| if (!IsDolbyVisionAVCCodecId(codec_id) && |
| !IsDolbyVisionHEVCCodecId(codec_id)) { |
| return false; |
| } |
| |
| const int kMaxDvCodecIdLength = 5 // FOURCC string |
| + 1 // delimiting period |
| + 2 // profile id as 2 digit string |
| + 1 // delimiting period |
| + 2; // level id as 2 digit string. |
| |
| if (codec_id.size() > kMaxDvCodecIdLength) { |
| DVLOG(4) << __func__ << ": Codec id is too long (" << codec_id << ")"; |
| return false; |
| } |
| |
| std::vector<std::string> elem = base::SplitString( |
| codec_id, ".", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL); |
| DCHECK(elem[0] == "dvh1" || elem[0] == "dvhe" || elem[0] == "dva1" || |
| elem[0] == "dvav"); |
| |
| if (elem.size() != 3) { |
| DVLOG(4) << __func__ << ": invalid dolby vision codec id " << codec_id; |
| return false; |
| } |
| |
| // Profile string should be two digits. |
| unsigned profile_id = 0; |
| if (elem[1].size() != 2 || !base::StringToUint(elem[1], &profile_id) || |
| profile_id > 9) { |
| DVLOG(4) << __func__ << ": invalid format or profile_id=" << elem[1]; |
| return false; |
| } |
| |
| // Only profiles 0, 4, 5, 7, 8 and 9 are valid. Profile 0 and 9 are encoded |
| // based on AVC while profile 4, 5, 7 and 8 are based on HEVC. |
| switch (profile_id) { |
| case 0: |
| case 9: |
| if (!IsDolbyVisionAVCCodecId(codec_id)) { |
| DVLOG(4) << __func__ |
| << ": codec id is mismatched with profile_id=" << profile_id; |
| return false; |
| } |
| if (profile_id == 0) |
| *profile = DOLBYVISION_PROFILE0; |
| else if (profile_id == 9) |
| *profile = DOLBYVISION_PROFILE9; |
| break; |
| #if BUILDFLAG(ENABLE_HEVC_DEMUXING) |
| case 4: |
| case 5: |
| case 7: |
| case 8: |
| if (!IsDolbyVisionHEVCCodecId(codec_id)) { |
| DVLOG(4) << __func__ |
| << ": codec id is mismatched with profile_id=" << profile_id; |
| return false; |
| } |
| if (profile_id == 4) |
| *profile = DOLBYVISION_PROFILE4; |
| else if (profile_id == 5) |
| *profile = DOLBYVISION_PROFILE5; |
| else if (profile_id == 7) |
| *profile = DOLBYVISION_PROFILE7; |
| else if (profile_id == 8) |
| *profile = DOLBYVISION_PROFILE8; |
| break; |
| #endif |
| default: |
| DVLOG(4) << __func__ |
| << ": depecrated and not supported profile_id=" << profile_id; |
| return false; |
| } |
| |
| // Level string should be two digits. |
| unsigned level_id = 0; |
| if (elem[2].size() != 2 || !base::StringToUint(elem[2], &level_id) || |
| level_id > 9 || level_id < 1) { |
| DVLOG(4) << __func__ << ": invalid format level_id=" << elem[2]; |
| return false; |
| } |
| |
| *level_idc = level_id; |
| |
| return true; |
| } |
| #endif |
| |
| VideoCodec StringToVideoCodec(const std::string& codec_id) { |
| std::vector<std::string> elem = base::SplitString( |
| codec_id, ".", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL); |
| if (elem.empty()) |
| return kUnknownVideoCodec; |
| |
| VideoCodecProfile profile = VIDEO_CODEC_PROFILE_UNKNOWN; |
| uint8_t level = 0; |
| VideoColorSpace color_space; |
| |
| if (codec_id == "vp8" || codec_id == "vp8.0") |
| return kCodecVP8; |
| if (ParseNewStyleVp9CodecID(codec_id, &profile, &level, &color_space) || |
| ParseLegacyVp9CodecID(codec_id, &profile, &level)) { |
| return kCodecVP9; |
| } |
| |
| #if BUILDFLAG(ENABLE_AV1_DECODER) |
| if (ParseAv1CodecId(codec_id, &profile, &level, &color_space)) |
| return kCodecAV1; |
| #endif |
| |
| if (codec_id == "theora") |
| return kCodecTheora; |
| if (ParseAVCCodecId(codec_id, &profile, &level)) |
| return kCodecH264; |
| #if BUILDFLAG(ENABLE_MSE_MPEG2TS_STREAM_PARSER) |
| if (ParseAVCCodecId(TranslateLegacyAvc1CodecIds(codec_id), &profile, &level)) |
| return kCodecH264; |
| #endif |
| #if BUILDFLAG(ENABLE_HEVC_DEMUXING) |
| if (ParseHEVCCodecId(codec_id, &profile, &level)) |
| return kCodecHEVC; |
| #endif |
| #if BUILDFLAG(ENABLE_DOLBY_VISION_DEMUXING) |
| if (ParseDolbyVisionCodecId(codec_id, &profile, &level)) |
| return kCodecDolbyVision; |
| #endif |
| return kUnknownVideoCodec; |
| } |
| |
| } // namespace media |
