1 files changed, 85 insertions, 0 deletions
diff --git a/dlna/profiles/ac3.cpp b/dlna/profiles/ac3.cpp
new file mode 100644
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--- /dev/null
+++ b/dlna/profiles/ac3.cpp
@@ -0,0 +1,85 @@
+/* 
+ * File:   profiles_ac3.cpp
+ * Author: savop
+ * 
+ * Created on 7. Dezember 2009, 13:04
+ */
+
+#include "profiles/ac3.h"
+#include "util.h"
+#include "avdetector.h"
+
+DLNAProfile DLNA_PROFILE_AC3 = { "AC3" , "audio/vnd.dolby.dd-raw" };
+
+/**
+ * Accepted audio bitrates
+ *
+ * This are all accepted audio bitrates of this profile
+ * The standard says 64Kbps - 640Kbps. However, 32Kbps is used as
+ * lower limit to accept low bitrate streams in ATSC and DVB broadcast streams.
+ */
+AcceptedBitrates        DLNA_BITRATES_AC3  = { true, {Kbps(32), Kbps(448)}};
+AcceptedBitrates        DLNA_BITRATES_XAC3 = { true, {Kbps(64), Kbps(640)}};
+
+/**
+ * Accepted audio channel layouts
+ *
+ * This are all accepted audio channel layouts including LFE.
+ * Though the LFE is optional and not explicitly mentioned in the documents to be supported
+ * by this profile, it is supported by this plugin as it makes no sense to do not.
+ * However, this may result in difficulties on some players if they follow the standard correctly
+ *
+ */
+AcceptedAudioChannels   DLNA_AUDIOCHANNELS_AC3 = { 5, { CHANNEL_LAYOUT_10, CHANNEL_LAYOUT_20, CHANNEL_LAYOUT_21,
+                                                        CHANNEL_LAYOUT_22, CHANNEL_LAYOUT_30, CHANNEL_LAYOUT_31,
+                                                        CHANNEL_LAYOUT_32, CHANNEL_LAYOUT_10_1, CHANNEL_LAYOUT_20_1,
+                                                        CHANNEL_LAYOUT_21_1, CHANNEL_LAYOUT_22_1, CHANNEL_LAYOUT_30_1,
+                                                        CHANNEL_LAYOUT_31_1, CHANNEL_LAYOUT_5_1
+                                                   }, true };
+
+/**
+ * Accepted audio sample rates
+ *
+ * This are all accepted audio sample rates
+ * In ATSC systems only 48kHz are supported, the other two sample rates were
+ * removed from standard. However, I do not specialice here if there is no
+ * real reason for.
+ */
+AcceptedSamplingRates   DLNA_SAMPLINGRATES_AC3  = {{ KHz(32), KHz(44.1), KHz(48) }};
+AcceptedSamplingRates   DLNA_SAMPLINGRATES_XAC3 = {{ KHz(48) }};
+
+AudioPortionProfile cAC3Profiler::probeAudioProfile(AVFormatContext* FormatCtx){
+    AVCodecContext* AudioCodec = cCodecToolKit::getFirstCodecContext(FormatCtx, CODEC_TYPE_AUDIO);
+
+    if(AudioCodec->codec_id == CODEC_ID_AC3){
+        // VBR
+        if(cCodecToolKit::matchesAcceptedBitrates(DLNA_BITRATES_AC3, AudioCodec) &&
+           cCodecToolKit::matchesAcceptedAudioChannels(DLNA_AUDIOCHANNELS_AC3, AudioCodec) &&
+           cCodecToolKit::matchesAcceptedSamplingRates(DLNA_SAMPLINGRATES_AC3, AudioCodec)){
+            return DLNA_APP_AC3;
+        }
+        else if(cCodecToolKit::matchesAcceptedBitrates(DLNA_BITRATES_XAC3, AudioCodec) &&
+           cCodecToolKit::matchesAcceptedAudioChannels(DLNA_AUDIOCHANNELS_AC3, AudioCodec) &&
+           cCodecToolKit::matchesAcceptedSamplingRates(DLNA_SAMPLINGRATES_XAC3, AudioCodec)){
+            return DLNA_APP_XAC3;
+        }
+        else {
+            return DLNA_APP_UNKNOWN;
+        }
+    }
+    else {
+        return DLNA_APP_UNKNOWN;
+    }
+}
+
+DLNAProfile* cAC3Profiler::probeDLNAProfile(AVFormatContext* FormatCtx){
+    AudioPortionProfile Profile = AC3Profiler.probeAudioProfile(FormatCtx);
+    if(Profile==DLNA_APP_AC3 || Profile==DLNA_APP_XAC3){
+        return &DLNA_PROFILE_AC3;
+    }
+    else {
+        return NULL;
+    }
+}
+
+cAC3Profiler AC3Profiler;
+\ No newline at end of file