Support a single format change at the beginning of audio playback. This way the AAC+ decoder may change its output format from what is originally encoded in the audio stream and we'll still play it back correctly.

Change-Id: Icc790122744745e9a88099788d4818ca1e265a82
related-to-bug: 2826841

1 files changed, 4 insertions, 66 deletions

diff --git a/media/libstagefright/MPEG4Extractor.cpp b/media/libstagefright/MPEG4Extractor.cpp
index 65d0146..0c2f1e6 100644
--- a/media/libstagefright/MPEG4Extractor.cpp
+++ b/media/libstagefright/MPEG4Extractor.cpp
@@ -1287,11 +1287,6 @@ status_t MPEG4Extractor::updateAudioTrackInfoFromESDS_MPEG4Audio(
     uint32_t freqIndex = (csd[0] & 7) << 1 | (csd[1] >> 7);
     int32_t sampleRate = 0;
     int32_t numChannels = 0;
-    uint8_t offset = 0;
-    static uint32_t kSamplingRate[] = {
-        96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050,
-        16000, 12000, 11025, 8000, 7350
-    };
     if (freqIndex == 15) {
         if (csd_size < 5) {
             return ERROR_MALFORMED;
@@ -1303,8 +1298,11 @@ status_t MPEG4Extractor::updateAudioTrackInfoFromESDS_MPEG4Audio(
                         | (csd[4] >> 7);
 
         numChannels = (csd[4] >> 3) & 15;
-        offset = 4;
     } else {
+        static uint32_t kSamplingRate[] = {
+            96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050,
+            16000, 12000, 11025, 8000, 7350
+        };
 
         if (freqIndex == 13 || freqIndex == 14) {
             return ERROR_MALFORMED;
@@ -1312,66 +1310,6 @@ status_t MPEG4Extractor::updateAudioTrackInfoFromESDS_MPEG4Audio(
 
         sampleRate = kSamplingRate[freqIndex];
         numChannels = (csd[1] >> 3) & 15;
-        offset = 1;
-    }
-
-    uint8_t sbrPresentFlag = -1;
-    uint8_t extensionAudioObjectType = 0;
-    if (objectType == 5) {
-        extensionAudioObjectType = objectType;
-        sbrPresentFlag = 1;
-        freqIndex = ((csd[offset] & 7) << 1) | (csd[offset + 1] >> 7);
-        offset += 1;
-        if (freqIndex == 15) {
-            sampleRate = (((csd[offset] & 0x7f) << 17)
-                            | (csd[offset + 1] << 9)
-                            | (csd[offset + 2] << 1)
-                            | (csd[offset + 3] >> 7));
-            offset += 3;
-        }
-        objectType = csd[offset] >> 3;
-    }
-
-    if (((objectType >= 1 && objectType <= 4) ||
-         (objectType >= 6 && objectType <= 7) ||
-         (objectType == 17) ||
-         (objectType >= 19 || objectType <= 23)) &&
-        (0x00 == (csd[offset] & 7)) &&
-        numChannels != 0) {
-
-        // XXX: We are not handling coreCoderDelay,
-        //      program_config_element(),
-        //      extensionFlag, scalable profile, etc.
-        if (objectType != 6 && objectType != 20) {
-            if (objectType != 5 && csd_size - offset >= 2) {
-                uint32_t syncExtensionType =
-                    (csd[offset + 1] << 3) | (csd[offset + 2] >> 5);
-                if (syncExtensionType == 0x2b7) {
-                    extensionAudioObjectType =
-                            csd[offset + 2] & 0x1F;
-                    if (extensionAudioObjectType == 0x05) {
-                        if (csd_size - offset < 3) {
-                            return ERROR_MALFORMED;
-                        }
-                        uint8_t sbrPresentFlag = csd[offset + 3] & 0x80;
-                        if (sbrPresentFlag) {
-                            freqIndex = (csd[offset + 3] & 0x78) >> 3;
-                            if (freqIndex == 15) {
-                                if (csd_size - offset < 6) {
-                                    return ERROR_MALFORMED;
-                                }
-                                sampleRate = (csd[offset + 3] & 0x07) << 21
-                                        | csd[offset + 4] << 13
-                                        | csd[offset + 5] << 5
-                                        | csd[offset + 6] >> 3;
-                            } else {
-                                sampleRate = kSamplingRate[freqIndex];
-                            }
-                        }
-                    }
-                }
-            }
-        }
     }
 
     if (numChannels == 0) {