From c297fccffc4ab1cb3b9f5c6a5b0802be057f3e0f Mon Sep 17 00:00:00 2001
From: Andreas Huber <andih@google.com>
Date: Tue, 1 Dec 2009 15:26:54 -0800
Subject: A small sample tool to encode pcm audio data to amr, decode it again
 and play it. Some changes to OMXCodec to properly configure the AMR
 decoder(s).

---
 cmds/stagefright/audioloop.cpp | 81 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 cmds/stagefright/audioloop.cpp

(limited to 'cmds/stagefright/audioloop.cpp')

diff --git a/cmds/stagefright/audioloop.cpp b/cmds/stagefright/audioloop.cpp
new file mode 100644
index 0000000..70ab559
--- /dev/null
+++ b/cmds/stagefright/audioloop.cpp
@@ -0,0 +1,81 @@
+#include "SineSource.h"
+
+#include <binder/ProcessState.h>
+#include <media/stagefright/AudioPlayer.h>
+#include <media/stagefright/MediaDebug.h>
+#include <media/stagefright/MediaDefs.h>
+#include <media/stagefright/MetaData.h>
+#include <media/stagefright/OMXClient.h>
+#include <media/stagefright/OMXCodec.h>
+
+using namespace android;
+
+int main() {
+    // We only have an AMR-WB encoder on sholes...
+    static bool outputWBAMR = false;
+    static const int32_t kSampleRate = outputWBAMR ? 16000 : 8000;
+    static const int32_t kNumChannels = 1;
+
+    android::ProcessState::self()->startThreadPool();
+
+    OMXClient client;
+    CHECK_EQ(client.connect(), OK);
+
+    sp<MediaSource> source = new SineSource(kSampleRate, kNumChannels);
+
+    sp<MetaData> meta = new MetaData;
+
+    meta->setCString(
+            kKeyMIMEType,
+            outputWBAMR ? MEDIA_MIMETYPE_AUDIO_AMR_WB
+                        : MEDIA_MIMETYPE_AUDIO_AMR_NB);
+
+    meta->setInt32(kKeyChannelCount, kNumChannels);
+    meta->setInt32(kKeySampleRate, kSampleRate);
+
+    int32_t maxInputSize;
+    if (source->getFormat()->findInt32(kKeyMaxInputSize, &maxInputSize)) {
+        meta->setInt32(kKeyMaxInputSize, maxInputSize);
+    }
+
+    sp<OMXCodec> encoder = OMXCodec::Create(
+            client.interface(),
+            meta, true /* createEncoder */,
+            source);
+
+    sp<OMXCodec> decoder = OMXCodec::Create(
+            client.interface(),
+            meta, false /* createEncoder */,
+            encoder);
+
+#if 1
+    AudioPlayer *player = new AudioPlayer(NULL);
+    player->setSource(decoder);
+
+    player->start();
+
+    sleep(10);
+
+    player->stop();
+
+    delete player;
+    player = NULL;
+#else
+    CHECK_EQ(decoder->start(), OK);
+
+    MediaBuffer *buffer;
+    while (decoder->read(&buffer) == OK) {
+        // do something with buffer
+
+        putchar('.');
+        fflush(stdout);
+
+        buffer->release();
+        buffer = NULL;
+    }
+
+    CHECK_EQ(decoder->stop(), OK);
+#endif
+
+    return 0;
+}
-- 
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