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https://gitlab.uni-freiburg.de/opensourcevdi/spice-common
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125cfa7fb2
Always use H_SPICE_COMMON_ prefix with uppercase filename (without extension). Signed-off-by: Frediano Ziglio <fziglio@redhat.com> Acked-by: Uri Lublin <uril@redhat.com
83 lines
3.0 KiB
C
83 lines
3.0 KiB
C
/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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/*
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Copyright (C) 2013 Jeremy White <jwhite@codeweavers.com>
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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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef H_SPICE_COMMON_SND_CODEC
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#define H_SPICE_COMMON_SND_CODEC
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#if HAVE_CELT051
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#include <celt051/celt.h>
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#endif
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#if HAVE_OPUS
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#include <opus.h>
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#endif
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/* Spice uses a very fixed protocol when transmitting CELT audio;
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audio must be transmitted in frames of 256, and we must compress
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data down to a fairly specific size (47, computation below).
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While the protocol doesn't inherently specify this, the expectation
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of older clients and server mandates it.
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*/
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#define SND_CODEC_CELT_FRAME_SIZE 256
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#define SND_CODEC_CELT_BIT_RATE (64 * 1024)
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#define SND_CODEC_CELT_PLAYBACK_FREQ 44100
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#define SND_CODEC_CELT_COMPRESSED_FRAME_BYTES (SND_CODEC_CELT_FRAME_SIZE * SND_CODEC_CELT_BIT_RATE / \
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SND_CODEC_CELT_PLAYBACK_FREQ / 8)
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#define SND_CODEC_OPUS_FRAME_SIZE 480
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#define SND_CODEC_OPUS_PLAYBACK_FREQ 48000
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#define SND_CODEC_OPUS_COMPRESSED_FRAME_BYTES 480
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#define SND_CODEC_PLAYBACK_CHAN 2
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#define SND_CODEC_MAX_FRAME_SIZE (MAX(SND_CODEC_CELT_FRAME_SIZE, SND_CODEC_OPUS_FRAME_SIZE))
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#define SND_CODEC_MAX_FRAME_BYTES (SND_CODEC_MAX_FRAME_SIZE * SND_CODEC_PLAYBACK_CHAN * 2 /* FMT_S16 */)
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#define SND_CODEC_MAX_COMPRESSED_BYTES MAX(SND_CODEC_CELT_COMPRESSED_FRAME_BYTES, SND_CODEC_OPUS_COMPRESSED_FRAME_BYTES)
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#define SND_CODEC_ANY_FREQUENCY -1
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#define SND_CODEC_OK 0
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#define SND_CODEC_UNAVAILABLE 1
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#define SND_CODEC_ENCODER_UNAVAILABLE 2
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#define SND_CODEC_DECODER_UNAVAILABLE 3
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#define SND_CODEC_ENCODE_FAILED 4
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#define SND_CODEC_DECODE_FAILED 5
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#define SND_CODEC_INVALID_ENCODE_SIZE 6
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#define SND_CODEC_ENCODE 0x0001
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#define SND_CODEC_DECODE 0x0002
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SPICE_BEGIN_DECLS
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typedef struct SndCodecInternal * SndCodec;
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int snd_codec_is_capable(int mode, int frequency);
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int snd_codec_create(SndCodec *codec, int mode, int frequency, int purpose);
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void snd_codec_destroy(SndCodec *codec);
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int snd_codec_frame_size(SndCodec codec);
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int snd_codec_encode(SndCodec codec, uint8_t *in_ptr, int in_size, uint8_t *out_ptr, int *out_size);
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int snd_codec_decode(SndCodec codec, uint8_t *in_ptr, int in_size, uint8_t *out_ptr, int *out_size);
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SPICE_END_DECLS
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#endif
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