Update to current webrtc library

This is from the upstream library commit id
3326535126e435f1ba647885ce43a8f0f3d317eb, corresponding to Chromium
88.0.4290.1.

webrtc/common_audio/wav_file.h

@@ -8,60 +8,69 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef WEBRTC_COMMON_AUDIO_WAV_FILE_H_
-#define WEBRTC_COMMON_AUDIO_WAV_FILE_H_
-
-#ifdef __cplusplus
+#ifndef COMMON_AUDIO_WAV_FILE_H_
+#define COMMON_AUDIO_WAV_FILE_H_
 
 #include <stdint.h>
+
 #include <cstddef>
 #include <string>
 
-#include "webrtc/base/constructormagic.h"
+#include "common_audio/wav_header.h"
+#include "rtc_base/system/file_wrapper.h"
 
 namespace webrtc {
 
-// Interface to provide access to WAV file parameters.
+// Interface to provide access WAV file parameters.
 class WavFile {
  public:
+  enum class SampleFormat { kInt16, kFloat };
+
   virtual ~WavFile() {}
 
   virtual int sample_rate() const = 0;
-  virtual int num_channels() const = 0;
-  virtual uint32_t num_samples() const = 0;
-
-  // Returns a human-readable string containing the audio format.
-  std::string FormatAsString() const;
+  virtual size_t num_channels() const = 0;
+  virtual size_t num_samples() const = 0;
 };
 
-// Simple C++ class for writing 16-bit PCM WAV files. All error handling is
-// by calls to RTC_CHECK(), making it unsuitable for anything but debug code.
+// Simple C++ class for writing 16-bit integer and 32 bit floating point PCM WAV
+// files. All error handling is by calls to RTC_CHECK(), making it unsuitable
+// for anything but debug code.
 class WavWriter final : public WavFile {
  public:
-  // Open a new WAV file for writing.
-  WavWriter(const std::string& filename, int sample_rate, int num_channels);
+  // Opens a new WAV file for writing.
+  WavWriter(const std::string& filename,
+            int sample_rate,
+            size_t num_channels,
+            SampleFormat sample_format = SampleFormat::kInt16);
+  WavWriter(FileWrapper file,
+            int sample_rate,
+            size_t num_channels,
+            SampleFormat sample_format = SampleFormat::kInt16);
 
-  // Close the WAV file, after writing its header.
-  ~WavWriter();
+  // Closes the WAV file, after writing its header.
+  ~WavWriter() { Close(); }
+
+  WavWriter(const WavWriter&) = delete;
+  WavWriter& operator=(const WavWriter&) = delete;
 
   // Write additional samples to the file. Each sample is in the range
-  // [-32768,32767], and there must be the previously specified number of
+  // [-32768.0,32767.0], and there must be the previously specified number of
   // interleaved channels.
   void WriteSamples(const float* samples, size_t num_samples);
   void WriteSamples(const int16_t* samples, size_t num_samples);
 
   int sample_rate() const override { return sample_rate_; }
-  int num_channels() const override { return num_channels_; }
-  uint32_t num_samples() const override { return num_samples_; }
+  size_t num_channels() const override { return num_channels_; }
+  size_t num_samples() const override { return num_samples_written_; }
 
  private:
   void Close();
   const int sample_rate_;
-  const int num_channels_;
-  uint32_t num_samples_;  // Total number of samples written to file.
-  FILE* file_handle_;  // Output file, owned by this class
-
-  RTC_DISALLOW_COPY_AND_ASSIGN(WavWriter);
+  const size_t num_channels_;
+  size_t num_samples_written_;
+  WavFormat format_;
+  FileWrapper file_;
 };
 
 // Follows the conventions of WavWriter.
@@ -69,9 +78,16 @@ class WavReader final : public WavFile {
  public:
   // Opens an existing WAV file for reading.
   explicit WavReader(const std::string& filename);
+  explicit WavReader(FileWrapper file);
 
   // Close the WAV file.
-  ~WavReader();
+  ~WavReader() { Close(); }
+
+  WavReader(const WavReader&) = delete;
+  WavReader& operator=(const WavReader&) = delete;
+
+  // Resets position to the beginning of the file.
+  void Reset();
 
   // Returns the number of samples read. If this is less than requested,
   // verifies that the end of the file was reached.
@@ -79,40 +95,21 @@ class WavReader final : public WavFile {
   size_t ReadSamples(size_t num_samples, int16_t* samples);
 
   int sample_rate() const override { return sample_rate_; }
-  int num_channels() const override { return num_channels_; }
-  uint32_t num_samples() const override { return num_samples_; }
+  size_t num_channels() const override { return num_channels_; }
+  size_t num_samples() const override { return num_samples_in_file_; }
 
  private:
   void Close();
   int sample_rate_;
-  int num_channels_;
-  uint32_t num_samples_;  // Total number of samples in the file.
-  uint32_t num_samples_remaining_;
-  FILE* file_handle_;  // Input file, owned by this class.
-
-  RTC_DISALLOW_COPY_AND_ASSIGN(WavReader);
+  size_t num_channels_;
+  WavFormat format_;
+  size_t num_samples_in_file_;
+  size_t num_unread_samples_;
+  FileWrapper file_;
+  int64_t
+      data_start_pos_;  // Position in the file immediately after WAV header.
 };
 
 }  // namespace webrtc
 
-extern "C" {
-#endif  // __cplusplus
-
-// C wrappers for the WavWriter class.
-typedef struct rtc_WavWriter rtc_WavWriter;
-rtc_WavWriter* rtc_WavOpen(const char* filename,
-                           int sample_rate,
-                           int num_channels);
-void rtc_WavClose(rtc_WavWriter* wf);
-void rtc_WavWriteSamples(rtc_WavWriter* wf,
-                         const float* samples,
-                         size_t num_samples);
-int rtc_WavSampleRate(const rtc_WavWriter* wf);
-int rtc_WavNumChannels(const rtc_WavWriter* wf);
-uint32_t rtc_WavNumSamples(const rtc_WavWriter* wf);
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif
-
-#endif  // WEBRTC_COMMON_AUDIO_WAV_FILE_H_
+#endif  // COMMON_AUDIO_WAV_FILE_H_