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https://gitlab.freedesktop.org/pipewire/pipewire.git
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8e6d070148
As part of this, in alsa-udev.c, certain structures and variables referred to as "device" are renamed to "card". Otherwise, there is ambiguity, since "device" can mean a udev device, an SPA device, a compress-offload device, a PCM device etc. Also, replace "card id" with "card number" to emphasize that these integers are not actually SPA object IDs.
36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
#include <errno.h>
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#include <inttypes.h>
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#include "compress-offload-api.h"
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#include "compress-offload-api-util.h"
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int get_compress_offload_device_direction(int card_nr, int device_nr,
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struct spa_log *log,
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enum spa_compress_offload_direction *direction)
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{
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int ret = 0;
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struct compress_offload_api_context *device_context;
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const struct snd_compr_caps *compr_caps;
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device_context = compress_offload_api_open(card_nr, device_nr, log);
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if (device_context == NULL)
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return -errno;
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compr_caps = compress_offload_api_get_caps(device_context);
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switch (compr_caps->direction) {
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case SND_COMPRESS_PLAYBACK:
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*direction = SPA_COMPRESS_OFFLOAD_DIRECTION_PLAYBACK;
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break;
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case SND_COMPRESS_CAPTURE:
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*direction = SPA_COMPRESS_OFFLOAD_DIRECTION_CAPTURE;
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break;
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default:
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spa_log_error(log, "card nr %d device nr %d: unknown direction %#" PRIx32,
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card_nr, device_nr, (uint32_t)(compr_caps->direction));
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ret = -EINVAL;
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}
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compress_offload_api_close(device_context);
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return ret;
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}
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