Hi, This RFC patchset is my concept work of another solution against a series of issues in ALSA PCM core, for which Iwai Takashi work in his hasty proposals[2][3]. Included changes are also available in my personal repository on github.com[4]. The aim of this work is to declare existent issues and to propose solutions as moderated as possible. Code refactoring is done to assist it. Patch 01-05: code refactoring phase, with an alias of function prototype. Patch 06-09: driver API changing phase. The .copy_frames is introduced. Patch 10-11: integration phase for proxy drivers, to get new configuration. I need to do this work with a little time (half a day), thus changes are as minimal as possible, especially two drivers are just modified even if drivers in below list should be changed: * drivers/media/pci/solo6x10/solo6x10-g723.c * sound/drivers/dummy.c * sound/isa/gus/gus_pcm.c * sound/isa/sb/emu8000_pcm.c * sound/pci/es1938.c * sound/pci/korg1212/korg1212.c * sound/pci/nm256/nm256.c * sound/pci/rme32.c * sound/pci/rme96.c * sound/pci/rme9652/hdsp.c * sound/pci/rme9652/rme9652.c * sound/sh/sh_dac_audio.c * sound/soc/blackfin/bf5xx-ac97-pcm.c * sound/soc/blackfin/bf5xx-i2s-pcm.c Furthermore, I apologize that this is untested. I wish you to check the concept. [1] [PATCH RFC 00/26] Kill set_fs() in ALSA codes http://mailman.alsa-project.org/pipermail/alsa-devel/2017-May/120542 [2] [PATCH 00/16] ALSA: Convert to new copy_silence PCM ops http://mailman.alsa-project.org/pipermail/alsa-devel/2017-May/120895.html [3] [PATCH 0/4] ALSA: Extend PCM buffer-copy helpers http://mailman.alsa-project.org/pipermail/alsa-devel/2017-May/120957.html [4] takaswie/sound https://github.com/takaswie/sound/tree/topic/add-pcm-frame-ops Takashi Sakamoto (11): ALSA: pcm: introduce an alias of prototype to copy PCM frames ALSA: pcm: use new function alias instead of local one ALSA: pcm: refactoring silence operation ALSA: pcm: add alternative calls ALSA: core: remove duplicated codes to handle PCM frames ALSA: pcm: add new operation; copy_frames ALSA: rme9652: a sample for drivers which support interleaved buffer ALSA: gus: a sample for drivers which support non-interleaved buffer ALSA: pcm: remove copy and silence callbacks ALSA: pcm: add client_space parameter to runtime of PCM substream for PCM proxy drivers ALSA: pcm: add new configuration for PCM proxy drivers drivers/usb/gadget/Kconfig | 3 +- include/sound/pcm.h | 13 +- sound/core/Kconfig | 15 +- sound/core/pcm_lib.c | 448 +++++++++++++++++++++++++++++---------------- sound/core/pcm_native.c | 10 + sound/isa/gus/gus_pcm.c | 100 +++++----- sound/pci/rme9652/hdsp.c | 59 +++--- 7 files changed, 398 insertions(+), 250 deletions(-) -- 2.11.0 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
