Enable pcm_s32le audio decoding.

To accomodate this change, a new kSampleFormatS24 has been introduced.
It is only used with S24LE PCM input. FFmpeg treats pcm_s24le as an
encoded format that can be decoded into s32le samples; kSampleFormatS24
only exists on the Chrome side to distinguish FFmpeg's pcm_s24le from
pcm_s32le, both of which use Chrome's catch-all kCodecPCM codec and
the same real sample format.

BUG=557170,internal b/22378279
TEST=media_unittests --gtest_filter=AudioBufferTest.*
media_unittests --gtest_filter=PipelineIntegrationTest.S32PlaybackHashed

Review URL: https://codereview.chromium.org/1422113002

Cr-Commit-Position: refs/heads/master@{#361545}

1 files changed, 8 insertions, 0 deletions

diff --git a/media/test/pipeline_integration_test.cc b/media/test/pipeline_integration_test.cc
index b19b32c..69da770 100644
--- a/media/test/pipeline_integration_test.cc
+++ b/media/test/pipeline_integration_test.cc
@@ -909,6 +909,14 @@ TEST_F(PipelineIntegrationTest, BasicPlaybackLive) {
             demuxer_->GetTimelineOffset());
 }
 
+TEST_F(PipelineIntegrationTest, S32PlaybackHashed) {
+  ASSERT_EQ(PIPELINE_OK, Start("sfx_s32le.wav", kHashed));
+  Play();
+  ASSERT_TRUE(WaitUntilOnEnded());
+  EXPECT_HASH_EQ(std::string(kNullVideoHash), GetVideoHash());
+  EXPECT_HASH_EQ("3.03,2.86,2.99,3.31,3.57,4.06,", GetAudioHash());
+}
+
 TEST_F(PipelineIntegrationTest, F32PlaybackHashed) {
   ASSERT_EQ(PIPELINE_OK, Start("sfx_f32le.wav", kHashed));
   Play();