mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
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eb096bfb62
Define some rules for how the position information works for channels > SPA_AUDIO_MAX_CHANNELS. We basically wrap around and incrementing the AUX channel counters. Make a function to implement this.
101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/* Simple Plugin API */
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/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
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/* SPDX-License-Identifier: MIT */
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#ifndef SPA_AUDIO_RAW_UTILS_H
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#define SPA_AUDIO_RAW_UTILS_H
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#include <spa/pod/parser.h>
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#include <spa/pod/iter.h>
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#include <spa/pod/builder.h>
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#include <spa/param/audio/format.h>
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#include <spa/param/format-utils.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \addtogroup spa_param
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* \{
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*/
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#ifndef SPA_API_AUDIO_RAW_UTILS
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#ifdef SPA_API_IMPL
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#define SPA_API_AUDIO_RAW_UTILS SPA_API_IMPL
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#else
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#define SPA_API_AUDIO_RAW_UTILS static inline
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#endif
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#endif
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SPA_API_AUDIO_RAW_UTILS uint32_t
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spa_format_audio_get_position(struct spa_audio_info_raw *info, uint32_t idx)
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{
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uint32_t pos;
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if (idx < SPA_AUDIO_MAX_CHANNELS) {
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pos = info->position[idx];
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} else {
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pos = info->position[idx % SPA_AUDIO_MAX_CHANNELS];
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if (SPA_AUDIO_CHANNEL_IS_AUX(pos))
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pos += (idx / SPA_AUDIO_MAX_CHANNELS) * SPA_AUDIO_MAX_CHANNELS;
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}
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return pos;
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}
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SPA_API_AUDIO_RAW_UTILS int
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spa_format_audio_raw_parse(const struct spa_pod *format, struct spa_audio_info_raw *info)
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{
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struct spa_pod *position = NULL;
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int res;
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info->flags = 0;
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res = spa_pod_parse_object(format,
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SPA_TYPE_OBJECT_Format, NULL,
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SPA_FORMAT_AUDIO_format, SPA_POD_OPT_Id(&info->format),
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SPA_FORMAT_AUDIO_rate, SPA_POD_OPT_Int(&info->rate),
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SPA_FORMAT_AUDIO_channels, SPA_POD_OPT_Int(&info->channels),
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SPA_FORMAT_AUDIO_position, SPA_POD_OPT_Pod(&position));
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if (position == NULL ||
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!spa_pod_copy_array(position, SPA_TYPE_Id, info->position, SPA_AUDIO_MAX_CHANNELS))
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SPA_FLAG_SET(info->flags, SPA_AUDIO_FLAG_UNPOSITIONED);
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return res;
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}
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SPA_API_AUDIO_RAW_UTILS struct spa_pod *
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spa_format_audio_raw_build(struct spa_pod_builder *builder, uint32_t id,
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const struct spa_audio_info_raw *info)
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{
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struct spa_pod_frame f;
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spa_pod_builder_push_object(builder, &f, SPA_TYPE_OBJECT_Format, id);
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spa_pod_builder_add(builder,
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SPA_FORMAT_mediaType, SPA_POD_Id(SPA_MEDIA_TYPE_audio),
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SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_raw),
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0);
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if (info->format != SPA_AUDIO_FORMAT_UNKNOWN)
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spa_pod_builder_add(builder,
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SPA_FORMAT_AUDIO_format, SPA_POD_Id(info->format), 0);
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if (info->rate != 0)
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spa_pod_builder_add(builder,
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SPA_FORMAT_AUDIO_rate, SPA_POD_Int(info->rate), 0);
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if (info->channels != 0) {
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spa_pod_builder_add(builder,
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SPA_FORMAT_AUDIO_channels, SPA_POD_Int(info->channels), 0);
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if (!SPA_FLAG_IS_SET(info->flags, SPA_AUDIO_FLAG_UNPOSITIONED)) {
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spa_pod_builder_add(builder, SPA_FORMAT_AUDIO_position,
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SPA_POD_Array(sizeof(uint32_t), SPA_TYPE_Id,
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SPA_MIN(info->channels, SPA_N_ELEMENTS(info->position)),
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info->position), 0);
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}
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}
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return (struct spa_pod*)spa_pod_builder_pop(builder, &f);
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}
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/**
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* \}
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*/
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* SPA_AUDIO_RAW_UTILS_H */
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