From 54255e7b572acdf06f37affd2539d313656a780c Mon Sep 17 00:00:00 2001
From: Johns <johns98@gmx.net>
Date: Mon, 11 Feb 2013 23:40:09 +0100
Subject: [PATCH] Try to use HBR (High Bit-Rate) for EAC3.

---
 ChangeLog |  1 +
 audio.c   | 25 ++++++++++++++++++++++---
 codec.c   | 32 +++++++++++++++++++++++---------
 3 files changed, 46 insertions(+), 12 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 891fb78..10aac97 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,7 @@
 User johns
 Date:
 
+    Try to use HBR (High Bit-Rate) for EAC3.
     Improved pass-through (PCM+EAC3) support.
     Support VDR 1.7.36 new build system.
     Improves VDPAU display preemption handling.
diff --git a/audio.c b/audio.c
index 369eec9..cc3869e 100644
--- a/audio.c
+++ b/audio.c
@@ -178,7 +178,7 @@ enum _audio_rates
     //Audio88200,				///< 88.2Khz
     //Audio96000,				///< 96.0Khz
     //Audio176400,				///< 176.4Khz
-    //Audio192000,				///< 192.0Khz
+    Audio192000,			///< 192.0Khz
     AudioRatesMax			///< max index
 };
 
@@ -190,7 +190,7 @@ static int AudioChannelMatrix[AudioRatesMax][9];
 
     /// rates tables (must be sorted by frequency)
 static const unsigned AudioRatesTable[AudioRatesMax] = {
-    44100, 48000,
+    44100, 48000, 192000
 };
 
 //----------------------------------------------------------------------------
@@ -2794,6 +2794,7 @@ void AudioInit(void)
     //	Check which channels/rates/formats are supported
     //	FIXME: we force 44.1Khz and 48Khz must be supported equal
     //	FIXME: should use bitmap of channels supported in RatesInHw
+    //	FIXME: use loop over sample-rates
     freq = 44100;
     AudioRatesInHw[Audio44100] = 0;
     for (chan = 1; chan < 9; ++chan) {
@@ -2821,12 +2822,30 @@ void AudioInit(void)
 	tchan = chan;
 	tfreq = freq;
 	if (AudioUsedModule->Setup(&tfreq, &tchan, 0)) {
-	    AudioChannelsInHw[chan] = 0;
+	    //AudioChannelsInHw[chan] = 0;
 	} else {
 	    AudioChannelsInHw[chan] = chan;
 	    AudioRatesInHw[Audio48000] |= (1 << chan);
 	}
     }
+    freq = 192000;
+    AudioRatesInHw[Audio192000] = 0;
+    for (chan = 1; chan < 9; ++chan) {
+	int tchan;
+	int tfreq;
+
+	if (!AudioChannelsInHw[chan]) {
+	    continue;
+	}
+	tchan = chan;
+	tfreq = freq;
+	if (AudioUsedModule->Setup(&tfreq, &tchan, 0)) {
+	    //AudioChannelsInHw[chan] = 0;
+	} else {
+	    AudioChannelsInHw[chan] = chan;
+	    AudioRatesInHw[Audio192000] |= (1 << chan);
+	}
+    }
     //	build channel support and conversion table
     for (u = 0; u < AudioRatesMax; ++u) {
 	for (chan = 1; chan < 9; ++chan) {
diff --git a/codec.c b/codec.c
index 13801dc..07e4b96 100644
--- a/codec.c
+++ b/codec.c
@@ -976,21 +976,33 @@ static int CodecAudioUpdateHelper(AudioDecoder * audio_decoder,
     if ((CodecPassthrough & CodecAC3 && audio_ctx->codec_id == CODEC_ID_AC3)
 	|| (CodecPassthrough & CodecEAC3
 	    && audio_ctx->codec_id == CODEC_ID_EAC3)) {
+	if (audio_ctx->codec_id == CODEC_ID_EAC3) {
+	    // EAC3 over HDMI some receivers need HBR
+	    audio_decoder->HwSampleRate *= 4;
+	}
 	audio_decoder->HwChannels = 2;
 	audio_decoder->SpdifIndex = 0;	// reset buffer
 	audio_decoder->SpdifCount = 0;
 	*passthrough = 1;
     }
-    // channels not support?
+    // channels/sample-rate not support?
     if ((err =
 	    AudioSetup(&audio_decoder->HwSampleRate,
 		&audio_decoder->HwChannels, *passthrough))) {
 
-	Debug(3, "codec/audio: audio setup error\n");
-	// FIXME: handle errors
-	audio_decoder->HwChannels = 0;
-	audio_decoder->HwSampleRate = 0;
-	return err;
+	// try EAC3 none HBR
+	audio_decoder->HwSampleRate /= 4;
+	if (audio_ctx->codec_id != CODEC_ID_EAC3
+	    || (err =
+		AudioSetup(&audio_decoder->HwSampleRate,
+		    &audio_decoder->HwChannels, *passthrough))) {
+
+	    Debug(3, "codec/audio: audio setup error\n");
+	    // FIXME: handle errors
+	    audio_decoder->HwChannels = 0;
+	    audio_decoder->HwSampleRate = 0;
+	    return err;
+	}
     }
 
     Debug(3, "codec/audio: resample %s %dHz *%d -> %s %dHz *%d\n",
@@ -1073,8 +1085,10 @@ static int CodecAudioPassthroughHelper(AudioDecoder * audio_decoder,
 	// build SPDIF header and append A52 audio to it
 	// avpkt is the original data
 	spdif = audio_decoder->Spdif;
-	spdif_sz = 6144;
-	// 24576 = 4 * 6144
+	spdif_sz = 24576;		// 4 * 6144
+	if (audio_decoder->HwSampleRate == 48000) {
+	    spdif_sz = 6144;
+	}
 	if (spdif_sz < audio_decoder->SpdifIndex + avpkt->size + 8) {
 	    Error(_("codec/audio: decoded data smaller than encoded\n"));
 	    return -1;
@@ -1087,7 +1101,7 @@ static int CodecAudioPassthroughHelper(AudioDecoder * audio_decoder,
 	    // fscod2
 	    repeat = eac3_repeat[(avpkt->data[4] & 0x30) >> 4];
 	}
-	//fprintf(stderr, "repeat %d\n", repeat);
+	// fprintf(stderr, "repeat %d %d\n", repeat, avpkt->size);
 
 	// copy original data for output
 	// pack upto repeat EAC-3 pakets into one IEC 61937 burst