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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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76d807893c
The initial support for the new ALSA chmap API. Just translate the current chmap to GstAudioChannelPosition during the setup. No function to specify the channel map manually yet, so still impossible to assign any non-standard positions or to configure in a different order even if the hardware allows. https://bugzilla.gnome.org/show_bug.cgi?id=709755
80 lines
3 KiB
C
80 lines
3 KiB
C
/*
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* Copyright (C) 2001 CodeFactory AB
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* Copyright (C) 2001 Thomas Nyberg <thomas@codefactory.se>
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* Copyright (C) 2001-2002 Andy Wingo <apwingo@eos.ncsu.edu>
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* Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_ALSA_H__
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#define __GST_ALSA_H__
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#define ALSA_PCM_NEW_HW_PARAMS_API
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#define ALSA_PCM_NEW_SW_PARAMS_API
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#include <alsa/asoundlib.h>
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#include <alsa/control.h>
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#include <alsa/error.h>
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#include <gst/gst.h>
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#include <gst/audio/audio.h>
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#define GST_CHECK_ALSA_VERSION(major,minor,micro) \
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(SND_LIB_MAJOR > (major) || \
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(SND_LIB_MAJOR == (major) && SND_LIB_MINOR > (minor)) || \
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(SND_LIB_MAJOR == (major) && SND_LIB_MINOR == (minor) && \
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SND_LIB_SUBMINOR >= (micro)))
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#define PASSTHROUGH_CAPS \
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"audio/x-ac3, framed = (boolean) true;" \
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"audio/x-eac3, framed = (boolean) true; " \
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"audio/x-dts, framed = (boolean) true, " \
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"block-size = (int) { 512, 1024, 2048 }; " \
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"audio/mpeg, mpegversion = (int) 1, " \
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"mpegaudioversion = (int) [ 1, 2 ], parsed = (boolean) true;"
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GST_DEBUG_CATEGORY_EXTERN (alsa_debug);
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#define GST_CAT_DEFAULT alsa_debug
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snd_pcm_t * gst_alsa_open_iec958_pcm (GstObject * obj, gchar *device);
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GstCaps * gst_alsa_probe_supported_formats (GstObject * obj,
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gchar * device,
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snd_pcm_t * handle,
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const GstCaps * template_caps);
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gchar * gst_alsa_find_device_name (GstObject * obj,
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const gchar * device,
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snd_pcm_t * handle,
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snd_pcm_stream_t stream);
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gchar * gst_alsa_find_card_name (GstObject * obj,
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const gchar * devcard,
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snd_pcm_stream_t stream);
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void gst_alsa_add_channel_reorder_map (GstObject * obj,
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GstCaps * caps);
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extern const GstAudioChannelPosition alsa_position[][8];
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#ifdef SND_CHMAP_API_VERSION
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gboolean alsa_chmap_to_channel_positions (const snd_pcm_chmap_t *chmap,
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GstAudioChannelPosition *pos);
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#endif
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#endif /* __GST_ALSA_H__ */
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