Expose SampleFormat -> bytes per frame calculations.

First part of converting audio streams to reduce copying the data.

BUG=248989

Review URL: https://chromiumcodereview.appspot.com/16404013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@205937 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 4 insertions, 18 deletions

diff --git a/media/base/audio_decoder_config.h b/media/base/audio_decoder_config.h
index 5b886e0..1c61e70 100644
--- a/media/base/audio_decoder_config.h
+++ b/media/base/audio_decoder_config.h
@@ -10,6 +10,7 @@
 #include "base/basictypes.h"
 #include "media/base/channel_layout.h"
 #include "media/base/media_export.h"
+#include "media/base/sample_format.h"
 
 namespace media {
 
@@ -40,22 +41,6 @@ enum AudioCodec {
   kAudioCodecMax
 };
 
-enum SampleFormat {
-  // These values are histogrammed over time; do not change their ordinal
-  // values.  When deleting a sample format replace it with a dummy value; when
-  // adding a sample format, do so at the bottom before kSampleFormatMax.
-  kUnknownSampleFormat = 0,
-  kSampleFormatU8,         // Unsigned 8-bit w/ bias of 128.
-  kSampleFormatS16,        // Signed 16-bit.
-  kSampleFormatS32,        // Signed 32-bit.
-  kSampleFormatF32,        // Float 32-bit.
-  kSampleFormatPlanarS16,  // Signed 16-bit planar.
-  kSampleFormatPlanarF32,  // Float 32-bit planar.
-
-  // Must always be last!
-  kSampleFormatMax
-};
-
 // TODO(dalecurtis): FFmpeg API uses |bytes_per_channel| instead of
 // |bits_per_channel|, we should switch over since bits are generally confusing
 // to work with.
@@ -89,7 +74,8 @@ class MEDIA_EXPORT AudioDecoderConfig {
   bool Matches(const AudioDecoderConfig& config) const;
 
   AudioCodec codec() const { return codec_; }
-  int bits_per_channel() const { return bits_per_channel_; }
+  int bits_per_channel() const { return bytes_per_channel_ * 8; }
+  int bytes_per_channel() const { return bytes_per_channel_; }
   ChannelLayout channel_layout() const { return channel_layout_; }
   int samples_per_second() const { return samples_per_second_; }
   SampleFormat sample_format() const { return sample_format_; }
@@ -110,7 +96,7 @@ class MEDIA_EXPORT AudioDecoderConfig {
  private:
   AudioCodec codec_;
   SampleFormat sample_format_;
-  int bits_per_channel_;
+  int bytes_per_channel_;
   ChannelLayout channel_layout_;
   int samples_per_second_;
   int bytes_per_frame_;