81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
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/*
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* oxfw_stream.c - a part of driver for OXFW970/971 based devices
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*
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* Copyright (c) 2014 Takashi Sakamoto
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*
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* Licensed under the terms of the GNU General Public License, version 2.
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*/
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#include "oxfw.h"
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int snd_oxfw_stream_init_simplex(struct snd_oxfw *oxfw)
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{
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int err;
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err = cmp_connection_init(&oxfw->in_conn, oxfw->unit,
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CMP_INPUT, 0);
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if (err < 0)
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goto end;
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err = amdtp_stream_init(&oxfw->rx_stream, oxfw->unit,
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AMDTP_OUT_STREAM, CIP_NONBLOCKING);
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if (err < 0) {
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amdtp_stream_destroy(&oxfw->rx_stream);
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cmp_connection_destroy(&oxfw->in_conn);
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}
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end:
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return err;
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}
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static void stop_stream(struct snd_oxfw *oxfw)
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{
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amdtp_stream_pcm_abort(&oxfw->rx_stream);
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amdtp_stream_stop(&oxfw->rx_stream);
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cmp_connection_break(&oxfw->in_conn);
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}
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int snd_oxfw_stream_start_simplex(struct snd_oxfw *oxfw)
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{
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int err = 0;
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if (amdtp_streaming_error(&oxfw->rx_stream))
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stop_stream(oxfw);
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if (amdtp_stream_running(&oxfw->rx_stream))
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goto end;
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err = cmp_connection_establish(&oxfw->in_conn,
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amdtp_stream_get_max_payload(&oxfw->rx_stream));
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if (err < 0)
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goto end;
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err = amdtp_stream_start(&oxfw->rx_stream,
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oxfw->in_conn.resources.channel,
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oxfw->in_conn.speed);
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if (err < 0)
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stop_stream(oxfw);
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end:
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return err;
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}
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void snd_oxfw_stream_stop_simplex(struct snd_oxfw *oxfw)
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{
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stop_stream(oxfw);
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}
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void snd_oxfw_stream_destroy_simplex(struct snd_oxfw *oxfw)
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{
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stop_stream(oxfw);
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amdtp_stream_destroy(&oxfw->rx_stream);
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cmp_connection_destroy(&oxfw->in_conn);
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}
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void snd_oxfw_stream_update_simplex(struct snd_oxfw *oxfw)
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{
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if (cmp_connection_update(&oxfw->in_conn) < 0)
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stop_stream(oxfw);
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else
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amdtp_stream_update(&oxfw->rx_stream);
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}
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