cbxbiker61 Wrote:I just checked in code to deal with this problem in my xbmc repo. This entails adding a maxpassthroughbandwidth option to xbmc advanced settings.

You can now limit the bandwidth of high-def streams so that you'll be able to play the dts-core when your hardware doesn't support the high bandwidth requirement of dts-hd.

In ~/.xbmc/userdata add the maxpassthroughbandwidth to limit bandwidth to suitable rate for your system.

768000 is the default setting
Values to try: 48000, 192000 and 192001

48000 should always work, but will alway limit you to dts-core. 192000 and 192001 (they are equivalent in bandwidth by have different channel/frequency mappings) may work and will pass-through dts-hd. There are some dts-hd videos that will exceed this bandwidth and cause distortion.

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cbxbiker61 Wrote:Did you try with straight Alsa? If it behaves the same between the PulseAudio code and the Alsa code, I can't think of anything in the audio code that could be causing it. If PulseAudio pass-through doesn't work and Alsa does, then there could be a rate calculation that may be the issue.

cbxbiker61 Wrote:Yes, music is taking a different path than video in the xbmc code. I'm pretty sure that the music path never attempts to use pass-through. That would be the reason why IsPassthrough is always false for music. I haven't looked at that for quite a while ...well now I have. Here's the relevant bit in PAPlayer.cpp.

Code:

/* Open the device */
    m_pAudioDecoder[num] = CAudioRendererFactory::Create(
      m_pCallback         , //pCallback
      m_channelCount [num], //iChannels
      m_channelMap   [num], //channelMap
      m_sampleRate   [num], //uiSamplesPerSec
      m_bitsPerSample[num], //uiBitsPerSample
      false               , //bResample
      true                , //bIsMusic
      false                 //bPassthrough
    );

I don't have much in the way of multi-channel encoded music.

sjongele Wrote:I have tried the following:
* Dharma: OK
* pre-Eden: OK
* your pre-Eden, ALSA: not OK
* your pre-Eden, Pulse: not OK

I don't where it is, but as the "default" pre-Eden works correctly, I would assume there is a relation to AudioFilter. Hope you can find it; I'm using your pre-Eden as default media center

cbxbiker61 Wrote:I actually don't think it's AudioFilter, but more the fact that pass-through is being handled just a bit differently than non-pass-through.

After looking at the code a bit, I'm thinking the problem lies with the way that DVDNAV_NAV_PACKET's are being handled. You'll notice DVDNAV_NAV_PACKET DISCONTINUITY messages in your log. I think that code needs to be improved. You'll find the interesting code in DVDInputStreamNavigator.cpp:ProcessBlock:line 461+ and DVDPlayer.cpp:OnDVDNavResult:line 3185+. It actually looks like in OnDVDNavResult someone had planned to flush it out a bit more. I don't think it's handling the timestamp changes properly when starting a new VOB.

I'm focused on true-hd support so I don't have time to look at this at the moment.

Quote:18:53:18 T:140301531572096 DEBUG: GL: Requested render method: 2
18:53:18 T:140301531572096 DEBUG: GL: BaseYUV2RGBGLSLShader: defines:
#define XBMC_texture_rectangle 0
#define XBMC_texture_rectangle_hack 0
#define XBMC_STRETCH 0
#define XBMC_YV12
18:53:18 T:140301531572096 NOTICE: GL: Selecting Single Pass YUV 2 RGB shader
18:53:18 T:140301531572096 DEBUG: GL: Vertex Shader compilation log:
18:53:18 T:140301531572096 DEBUG: GL: Vertex Shader compiled successfully
18:53:18 T:140301531572096 DEBUG: GL: Pixel Shader compilation log:
18:53:18 T:140301531572096 DEBUG: GL: Fragment Shader compiled successfully
18:53:18 T:140301531572096 NOTICE: GL: NPOT texture support detected
18:53:18 T:140301531572096 NOTICE: GL: Using GL_ARB_pixel_buffer_object
18:53:18 T:140300945192704 DEBUG: CDVDPlayer::HandleMessages - player started 2
18:53:18 T:140301216810752 DEBUG: CDVDPlayerAudio:: Discontinuity - was:1615614.731209, should be:1898435.110155, error:282820.378946
... After this point a lot of Discontinuity...

Quote:20:08:12 T:140185186596736 DEBUG: GL: Requested render method: 2
20:08:12 T:140185186596736 DEBUG: GL: BaseYUV2RGBGLSLShader: defines:
#define XBMC_texture_rectangle 0
#define XBMC_texture_rectangle_hack 0
#define XBMC_STRETCH 0
#define XBMC_YV12
20:08:12 T:140185186596736 NOTICE: GL: Selecting Single Pass YUV 2 RGB shader
20:08:12 T:140185186596736 DEBUG: GL: Vertex Shader compilation log:
20:08:12 T:140185186596736 DEBUG: GL: Vertex Shader compiled successfully
20:08:12 T:140185186596736 DEBUG: GL: Pixel Shader compilation log:
20:08:12 T:140185186596736 DEBUG: GL: Fragment Shader compiled successfully
20:08:12 T:140185186596736 NOTICE: GL: NPOT texture support detected
20:08:12 T:140185186596736 NOTICE: GL: Using GL_ARB_pixel_buffer_object
20:08:12 T:140184620316416 DEBUG: CDVDPlayer::HandleMessages - player started 2
20:08:14 T:140184579897088 DEBUG: CPullupCorrection: detected pattern of length 1: 20000.00, frameduration: 20000.000000
20:08:15 T:140184579897088 DEBUG: CalcFrameRate framerate was:25.000000 calculated:50.000000
20:08:15 T:140184579897088 NOTICE: fps: 50.000000, pwidth: 720, pheight: 576, dwidth: 720, dheight: 405
20:08:15 T:140184579897088 DEBUG: OutputPicture - change configuration. 720x576. framerate: 50.00. format: YV12
20:08:15 T:140184579897088 NOTICE: Display resolution ADJUST : default: 1920x1080 @ 50.00Hz (14) (weight: 0.000)
20:08:16 T:140185186596736 NOTICE: Using GL_TEXTURE_2D
20:08:16 T:140185186596736 DEBUG: GL: Requested render method: 2
20:08:16 T:140185186596736 DEBUG: GL: BaseYUV2RGBGLSLShader: defines:
#define XBMC_texture_rectangle 0
#define XBMC_texture_rectangle_hack 0
#define XBMC_STRETCH 0
#define XBMC_YV12
20:08:16 T:140185186596736 NOTICE: GL: Selecting Single Pass YUV 2 RGB shader
20:08:16 T:140185186596736 DEBUG: GL: Vertex Shader compilation log:
20:08:16 T:140185186596736 DEBUG: GL: Vertex Shader compiled successfully
20:08:16 T:140185186596736 DEBUG: GL: Pixel Shader compilation log:
20:08:16 T:140185186596736 DEBUG: GL: Fragment Shader compiled successfully
20:08:16 T:140185186596736 NOTICE: GL: NPOT texture support detected
20:08:16 T:140185186596736 NOTICE: GL: Using GL_ARB_pixel_buffer_object

alexb38 Wrote:Not sure if it's the right topic, but I updated pulseaudio and xbmc-pvr on my setup to the latests git versions today and now I got pulseaudio passthrough working perfectly.

Now we just need to set the two audio parameters to "Defaults (pulseaudio)", check DTS and AC3 passthrough and it works.

I can now launch chromium and see a flash video and then go back to xbmc without messing with settings and still have great 5.1 sound on my films (btw I made a small script to launch an openbox session and a browser directly from xbmc, as I have xbmc running as a window manager. If anyone's interested I can make a tutorial).

Thanks to the developpers!