mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
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116 lines
3.3 KiB
C
116 lines
3.3 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 int
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spa_format_audio_raw_ext_parse(const struct spa_pod *format, struct spa_audio_info_raw *info, size_t size)
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{
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struct spa_pod *position = NULL;
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int res;
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uint32_t max_position = SPA_AUDIO_INFO_RAW_MAX_POSITION(size);
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if (!SPA_AUDIO_INFO_RAW_VALID_SIZE(size))
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return -EINVAL;
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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 (info->channels > max_position)
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return -ECHRNG;
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if (position == NULL ||
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spa_pod_copy_array(position, SPA_TYPE_Id, info->position, max_position) != info->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 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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return spa_format_audio_raw_ext_parse(format, info, sizeof(*info));
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}
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SPA_API_AUDIO_RAW_UTILS struct spa_pod *
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spa_format_audio_raw_ext_build(struct spa_pod_builder *builder, uint32_t id,
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const struct spa_audio_info_raw *info, size_t size)
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{
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struct spa_pod_frame f;
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uint32_t max_position = SPA_AUDIO_INFO_RAW_MAX_POSITION(size);
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if (!SPA_AUDIO_INFO_RAW_VALID_SIZE(size)) {
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errno = EINVAL;
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return NULL;
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}
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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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/* we drop the positions here when we can't read all of them. This is
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* really a malformed spa_audio_info structure. */
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if (!SPA_FLAG_IS_SET(info->flags, SPA_AUDIO_FLAG_UNPOSITIONED) &&
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max_position > info->channels) {
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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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info->channels, 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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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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return spa_format_audio_raw_ext_build(builder, id, info, sizeof(*info));
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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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