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| Original file line number | Diff line number | Diff line change |
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| # Description: | ||
| # Ops that process audio and/or video files using FFmpeg. | ||
| # (https://www.ffmpeg.org/) | ||
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| licenses(["notice"]) # Apache 2.0 | ||
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| exports_files(["LICENSE"]) | ||
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| package(default_visibility = ["//tensorflow:__subpackages__"]) |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,61 @@ | ||
| # Description: | ||
| # Libraries and kernels for manipulating audio and video using FFmpeg. | ||
| # (https://www.ffmpeg.org) | ||
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| licenses(["notice"]) # Apache 2.0 | ||
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| exports_files(["LICENSE"]) | ||
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| package(default_visibility = ["//tensorflow:__subpackages__"]) | ||
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| cc_library( | ||
| name = "ffmpeg_lib", | ||
| srcs = ["ffmpeg_lib.cc"], | ||
| hdrs = ["ffmpeg_lib.h"], | ||
| deps = [ | ||
| "//tensorflow/core:framework", | ||
| "//tensorflow/core:lib", | ||
| ], | ||
| ) | ||
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| cc_test( | ||
| name = "ffmpeg_lib_installed_test", | ||
| srcs = ["ffmpeg_lib_test.cc"], | ||
| args = [ | ||
| "--should_ffmpeg_be_installed=true", | ||
| ], | ||
| data = [ | ||
| ":testdata/test_sound1.mp3", | ||
| ], | ||
| tags = [ | ||
| "local", | ||
| "manual", | ||
| ], | ||
| deps = [ | ||
| ":ffmpeg_lib", | ||
| "//tensorflow/core:framework_internal", | ||
| "//tensorflow/core:lib", | ||
| "//tensorflow/core:test", | ||
| ], | ||
| ) | ||
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| cc_test( | ||
| name = "ffmpeg_lib_uninstalled_test", | ||
| srcs = ["ffmpeg_lib_test.cc"], | ||
| args = [ | ||
| "--should_ffmpeg_be_installed=false", | ||
| ], | ||
| data = [ | ||
| ":testdata/test_sound1.mp3", | ||
| ], | ||
| tags = [ | ||
| "local", | ||
| "manual", | ||
| ], | ||
| deps = [ | ||
| ":ffmpeg_lib", | ||
| "//tensorflow/core:framework_internal", | ||
| "//tensorflow/core:lib", | ||
| "//tensorflow/core:test", | ||
| ], | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,119 @@ | ||
| // Copyright 2016 Google Inc. All Rights Reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| // ============================================================================= | ||
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| #include "tensorflow/contrib/ffmpeg/kernels/ffmpeg_lib.h" | ||
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| #include <errno.h> | ||
| #include <stdlib.h> | ||
| #include <sys/stat.h> | ||
| #include <sys/types.h> | ||
| #include <sys/wait.h> | ||
| #include <unistd.h> | ||
| #include <string> | ||
| #include <tuple> | ||
| #include <vector> | ||
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| #include "tensorflow/core/lib/io/path.h" | ||
| #include "tensorflow/core/lib/strings/str_util.h" | ||
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| using tensorflow::strings::StrCat; | ||
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| namespace tensorflow { | ||
| namespace ffmpeg { | ||
| namespace { | ||
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| const char kFfmpegExecutable[] = "ffmpeg"; | ||
| const int32 kDefaultProbeSize = 5000000; // 5MB | ||
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| string GetTempFilename(const string& extension) { | ||
| for (const char* dir : std::vector<const char*>( | ||
| {getenv("TEST_TMPDIR"), getenv("TMPDIR"), getenv("TMP"), "/tmp"})) { | ||
| if (!dir || !dir[0]) { | ||
| continue; | ||
| } | ||
| struct stat statbuf; | ||
| if (!stat(dir, &statbuf) && S_ISDIR(statbuf.st_mode)) { | ||
| return io::JoinPath(dir, StrCat("tmp_file_", getpid(), ".", extension)); | ||
| } | ||
| } | ||
| LOG(FATAL) << "No temp directory found."; | ||
| } | ||
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| std::vector<string> FfmpegCommandLine(const string& input_filename, | ||
| const string& output_filename, | ||
| const string& input_format_id, | ||
| int32 samples_per_second, | ||
| int32 channel_count) { | ||
| return {"-nostats", // No additional progress display. | ||
| "-nostdin", // No interactive commands accepted. | ||
| "-f", input_format_id, // eg: "mp3" | ||
| "-probesize", StrCat(kDefaultProbeSize), "-i", input_filename, | ||
| "-loglevel", "info", // Enable verbose logging to support debugging. | ||
| "-map_metadata", "-1", // Copy global metadata from input to output. | ||
| "-vn", // No video recording. | ||
| "-ac:a:0", StrCat(channel_count), "-ar:a:0", | ||
| StrCat(samples_per_second), | ||
| // Output set (in several ways) to signed 16-bit little-endian ints. | ||
| "-codec:a:0", "pcm_s16le", "-sample_fmt", "s16", "-f", "s16le", | ||
| "-sn", // No subtitle recording. | ||
| "-y", // Overwrite output file. | ||
| StrCat(output_filename)}; | ||
| } | ||
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| [[noreturn]] int ExecuteFfmpeg(const std::vector<string>& args) { | ||
| std::vector<char*> args_chars; | ||
| std::transform(args.begin(), args.end(), std::back_inserter(args_chars), | ||
| [](const string& s) { return const_cast<char*>(s.c_str()); }); | ||
| args_chars.push_back(nullptr); | ||
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| ::execvp(kFfmpegExecutable, args_chars.data()); | ||
| // exec only returns on error. | ||
| const int error = errno; | ||
| LOG(ERROR) << "FFmpeg could not be executed: " << error; | ||
| ::_exit(error); | ||
| } | ||
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| } // namespace | ||
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| Status ReadAudioFile(const string& filename, const string& audio_format_id, | ||
| int32 samples_per_second, int32 channel_count, | ||
| std::vector<float>* output_samples) { | ||
| // Create an argument list. | ||
| string output_filename = GetTempFilename(audio_format_id); | ||
| const std::vector<string> args = | ||
| FfmpegCommandLine(filename, output_filename, audio_format_id, | ||
| samples_per_second, channel_count); | ||
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| // Execute ffmpeg and report errors. | ||
| pid_t child_pid = ::fork(); | ||
| if (child_pid < 0) { | ||
| return Status(error::Code::UNKNOWN, StrCat("fork failed: ", errno)); | ||
| } | ||
| if (child_pid == 0) { | ||
| ExecuteFfmpeg(args); | ||
| } else { | ||
| int status_code; | ||
| ::waitpid(child_pid, &status_code, 0); | ||
| if (!status_code) { | ||
| return Status::OK(); | ||
| } else { | ||
| return Status(error::Code::NOT_FOUND, | ||
| StrCat("FFmpeg execution failed: ", status_code)); | ||
| } | ||
| } | ||
| } | ||
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| } // namespace ffmpeg | ||
| } // namespace tensorflow |
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