diff --git a/packages/mediacenter/xbmc/patches/xbmc-990.17-PR2320.patch b/packages/mediacenter/xbmc/patches/xbmc-990.17-PR2320.patch new file mode 100644 index 0000000000..c800347443 --- /dev/null +++ b/packages/mediacenter/xbmc/patches/xbmc-990.17-PR2320.patch @@ -0,0 +1,144 @@ +From f2faaa846e03cbcc1ba11f09baad690c792035c5 Mon Sep 17 00:00:00 2001 +From: fritsch +Date: Thu, 28 Feb 2013 00:17:03 +0100 +Subject: [PATCH] AE: Revisit Device Opening. Try to set periodSize of 100 ms + and BufferSize of 800 ms + +--- + xbmc/cores/AudioEngine/Sinks/AESinkALSA.cpp | 98 ++++++++++++++++----------- + 1 file changed, 59 insertions(+), 39 deletions(-) + +diff --git a/xbmc/cores/AudioEngine/Sinks/AESinkALSA.cpp b/xbmc/cores/AudioEngine/Sinks/AESinkALSA.cpp +index fe40d17..821bd2e 100644 +--- a/xbmc/cores/AudioEngine/Sinks/AESinkALSA.cpp ++++ b/xbmc/cores/AudioEngine/Sinks/AESinkALSA.cpp +@@ -38,7 +38,6 @@ + #endif + + #define ALSA_OPTIONS (SND_PCM_NONBLOCK | SND_PCM_NO_AUTO_FORMAT | SND_PCM_NO_AUTO_CHANNELS | SND_PCM_NO_AUTO_RESAMPLE) +-#define ALSA_PERIODS 16 + + #define ALSA_MAX_CHANNELS 16 + static enum AEChannel ALSAChannelMap[ALSA_MAX_CHANNELS + 1] = { +@@ -328,59 +327,80 @@ bool CAESinkALSA::InitializeHW(AEAudioFormat &format) + } + } + +- unsigned int periods; +- + snd_pcm_uframes_t periodSize, bufferSize; + snd_pcm_hw_params_get_buffer_size_max(hw_params, &bufferSize); ++ snd_pcm_hw_params_get_period_size_max(hw_params, &periodSize, NULL); ++ ++ /* ++ We want to make sure, that we have approx 500 to 800 ms Buffer with ++ a periodSize of approx 100 ms. ++ It is calced: ++ periodSize = sampleRate / 10 ++ buffersize = periodSize * 1 frame * 8. ++ */ ++ periodSize = std::min(periodSize, (snd_pcm_uframes_t) sampleRate / 10); ++ bufferSize = std::min(bufferSize, (snd_pcm_uframes_t) periodSize * 8); ++ ++ /* ++ According to upstream we should set buffer size first - so make sure it is always at least ++ double of period size to not get underruns ++ */ ++ periodSize = std::min(periodSize, bufferSize / 2); + +- bufferSize = std::min(bufferSize, (snd_pcm_uframes_t)8192); +- periodSize = bufferSize / ALSA_PERIODS; +- periods = ALSA_PERIODS; +- +- CLog::Log(LOGDEBUG, "CAESinkALSA::InitializeHW - Request: periodSize %lu, periods %u, bufferSize %lu", periodSize, periods, bufferSize); ++ CLog::Log(LOGDEBUG, "CAESinkALSA::InitializeHW - Request: periodSize %lu, bufferSize %lu", periodSize, bufferSize); + +- /* work on a copy of the hw params */ + snd_pcm_hw_params_t *hw_params_copy; + snd_pcm_hw_params_alloca(&hw_params_copy); +- +- /* try to set the buffer size then the period size */ +- snd_pcm_hw_params_copy(hw_params_copy, hw_params); +- snd_pcm_hw_params_set_buffer_size_near(m_pcm, hw_params_copy, &bufferSize); +- snd_pcm_hw_params_set_period_size_near(m_pcm, hw_params_copy, &periodSize, NULL); +- snd_pcm_hw_params_set_periods_near (m_pcm, hw_params_copy, &periods , NULL); +- if (snd_pcm_hw_params(m_pcm, hw_params_copy) != 0) ++ snd_pcm_hw_params_copy(hw_params_copy, hw_params); // copy what we have and is already working ++ ++ // first trying bufferSize, PeriodSize ++ // for more info see here: ++ // http://mailman.alsa-project.org/pipermail/alsa-devel/2009-September/021069.html ++ // the last three tries are done as within pulseaudio ++ ++ // backup periodSize and bufferSize first. Restore them after every failed try ++ snd_pcm_uframes_t periodSizeTemp, bufferSizeTemp; ++ periodSizeTemp = periodSize; ++ bufferSizeTemp = bufferSize; ++ if (snd_pcm_hw_params_set_buffer_size_near(m_pcm, hw_params_copy, &bufferSize) != 0 ++ || snd_pcm_hw_params_set_period_size_near(m_pcm, hw_params_copy, &periodSize, NULL) != 0 ++ || snd_pcm_hw_params(m_pcm, hw_params_copy) != 0) + { +- /* try to set the period size then the buffer size */ +- snd_pcm_hw_params_copy(hw_params_copy, hw_params); +- snd_pcm_hw_params_set_period_size_near(m_pcm, hw_params_copy, &periodSize, NULL); +- snd_pcm_hw_params_set_buffer_size_near(m_pcm, hw_params_copy, &bufferSize); +- snd_pcm_hw_params_set_periods_near (m_pcm, hw_params_copy, &periods , NULL); +- if (snd_pcm_hw_params(m_pcm, hw_params_copy) != 0) ++ bufferSize = bufferSizeTemp; ++ periodSize = periodSizeTemp; ++ // retry with PeriodSize, bufferSize ++ snd_pcm_hw_params_copy(hw_params_copy, hw_params); // restore working copy ++ if (snd_pcm_hw_params_set_period_size_near(m_pcm, hw_params_copy, &periodSize, NULL) != 0 ++ || snd_pcm_hw_params_set_buffer_size_near(m_pcm, hw_params_copy, &bufferSize) != 0 ++ || snd_pcm_hw_params(m_pcm, hw_params_copy) != 0) + { +- /* try to just set the buffer size */ +- snd_pcm_hw_params_copy(hw_params_copy, hw_params); +- snd_pcm_hw_params_set_buffer_size_near(m_pcm, hw_params_copy, &bufferSize); +- snd_pcm_hw_params_set_periods_near (m_pcm, hw_params_copy, &periods , NULL); +- if (snd_pcm_hw_params(m_pcm, hw_params_copy) != 0) ++ // try only periodSize ++ periodSize = periodSizeTemp; ++ snd_pcm_hw_params_copy(hw_params_copy, hw_params); // restore working copy ++ if(snd_pcm_hw_params_set_period_size_near(m_pcm, hw_params_copy, &periodSize, NULL) != 0 ++ || snd_pcm_hw_params(m_pcm, hw_params_copy) != 0) + { +- /* try to just set the period size */ +- snd_pcm_hw_params_copy(hw_params_copy, hw_params); +- snd_pcm_hw_params_set_period_size_near(m_pcm, hw_params_copy, &periodSize, NULL); +- snd_pcm_hw_params_set_periods_near (m_pcm, hw_params_copy, &periods , NULL); +- if (snd_pcm_hw_params(m_pcm, hw_params_copy) != 0) ++ // try only BufferSize ++ bufferSize = bufferSizeTemp; ++ snd_pcm_hw_params_copy(hw_params_copy, hw_params); // restory working copy ++ if (snd_pcm_hw_params_set_buffer_size_near(m_pcm, hw_params_copy, &bufferSize) != 0 ++ || snd_pcm_hw_params(m_pcm, hw_params_copy) != 0) + { +- CLog::Log(LOGERROR, "CAESinkALSA::InitializeHW - Failed to set the parameters"); +- return false; ++ // set default that Alsa would choose ++ CLog::Log(LOGWARNING, "CAESinkAlsa::IntializeHW - Using default alsa values - set failed"); ++ if (snd_pcm_hw_params(m_pcm, hw_params) != 0) ++ { ++ CLog::Log(LOGDEBUG, "CAESinkALSA::InitializeHW - Could not init a valid sink"); ++ return false; ++ } + } + } ++ // reread values when alsa default was kept ++ snd_pcm_get_params(m_pcm, &bufferSize, &periodSize); + } + } +- +- snd_pcm_hw_params_get_period_size(hw_params_copy, &periodSize, NULL); +- snd_pcm_hw_params_get_buffer_size(hw_params_copy, &bufferSize); + +- +- CLog::Log(LOGDEBUG, "CAESinkALSA::InitializeHW - Got: periodSize %lu, periods %u, bufferSize %lu", periodSize, periods, bufferSize); ++ CLog::Log(LOGDEBUG, "CAESinkALSA::InitializeHW - Got: periodSize %lu, bufferSize %lu", periodSize, bufferSize); + + /* set the format parameters */ + format.m_sampleRate = sampleRate; +-- +1.7.10 +