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Diffstat (limited to 'third_party/pipewire/spa/buffer/meta.h')
| -rw-r--r-- | third_party/pipewire/spa/buffer/meta.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/third_party/pipewire/spa/buffer/meta.h b/third_party/pipewire/spa/buffer/meta.h new file mode 100644 index 0000000000..ae72ef970e --- /dev/null +++ b/third_party/pipewire/spa/buffer/meta.h @@ -0,0 +1,163 @@ +/* Simple Plugin API + * + * Copyright © 2018 Wim Taymans + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#ifndef SPA_META_H +#define SPA_META_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include <spa/utils/defs.h> +#include <spa/pod/pod.h> + +/** + * \addtogroup spa_buffer + * \{ + */ + +enum spa_meta_type { + SPA_META_Invalid, + SPA_META_Header, /**< struct spa_meta_header */ + SPA_META_VideoCrop, /**< struct spa_meta_region with cropping data */ + SPA_META_VideoDamage, /**< array of struct spa_meta_region with damage, where an invalid entry or end-of-array marks the end. */ + SPA_META_Bitmap, /**< struct spa_meta_bitmap */ + SPA_META_Cursor, /**< struct spa_meta_cursor */ + SPA_META_Control, /**< metadata contains a spa_meta_control + * associated with the data */ + SPA_META_Busy, /**< don't write to buffer when count > 0 */ + + _SPA_META_LAST, /**< not part of ABI/API */ +}; + +/** + * A metadata element. + * + * This structure is available on the buffer structure and contains + * the type of the metadata and a pointer/size to the actual metadata + * itself. + */ +struct spa_meta { + uint32_t type; /**< metadata type, one of enum spa_meta_type */ + uint32_t size; /**< size of metadata */ + void *data; /**< pointer to metadata */ +}; + +#define spa_meta_first(m) ((m)->data) +#define spa_meta_end(m) SPA_PTROFF((m)->data,(m)->size,void) +#define spa_meta_check(p,m) (SPA_PTROFF(p,sizeof(*p),void) <= spa_meta_end(m)) + +/** + * Describes essential buffer header metadata such as flags and + * timestamps. + */ +struct spa_meta_header { +#define SPA_META_HEADER_FLAG_DISCONT (1 << 0) /**< data is not continuous with previous buffer */ +#define SPA_META_HEADER_FLAG_CORRUPTED (1 << 1) /**< data might be corrupted */ +#define SPA_META_HEADER_FLAG_MARKER (1 << 2) /**< media specific marker */ +#define SPA_META_HEADER_FLAG_HEADER (1 << 3) /**< data contains a codec specific header */ +#define SPA_META_HEADER_FLAG_GAP (1 << 4) /**< data contains media neutral data */ +#define SPA_META_HEADER_FLAG_DELTA_UNIT (1 << 5) /**< cannot be decoded independently */ + uint32_t flags; /**< flags */ + uint32_t offset; /**< offset in current cycle */ + int64_t pts; /**< presentation timestamp in nanoseconds */ + int64_t dts_offset; /**< decoding timestamp as a difference with pts */ + uint64_t seq; /**< sequence number, increments with a + * media specific frequency */ +}; + +/** metadata structure for Region or an array of these for RegionArray */ +struct spa_meta_region { + struct spa_region region; +}; + +#define spa_meta_region_is_valid(m) ((m)->region.size.width != 0 && (m)->region.size.height != 0) + +/** iterate all the items in a metadata */ +#define spa_meta_for_each(pos,meta) \ + for (pos = (__typeof(pos))spa_meta_first(meta); \ + spa_meta_check(pos, meta); \ + (pos)++) + +#define spa_meta_bitmap_is_valid(m) ((m)->format != 0) + +/** + * Bitmap information + * + * This metadata contains a bitmap image in the given format and size. + * It is typically used for cursor images or other small images that are + * better transferred inline. + */ +struct spa_meta_bitmap { + uint32_t format; /**< bitmap video format, one of enum spa_video_format. 0 is + * and invalid format and should be handled as if there is + * no new bitmap information. */ + struct spa_rectangle size; /**< width and height of bitmap */ + int32_t stride; /**< stride of bitmap data */ + uint32_t offset; /**< offset of bitmap data in this structure. An offset of + * 0 means no image data (invisible), an offset >= + * sizeof(struct spa_meta_bitmap) contains valid bitmap + * info. */ +}; + +#define spa_meta_cursor_is_valid(m) ((m)->id != 0) + +/** + * Cursor information + * + * Metadata to describe the position and appearance of a pointing device. + */ +struct spa_meta_cursor { + uint32_t id; /**< cursor id. an id of 0 is an invalid id and means that + * there is no new cursor data */ + uint32_t flags; /**< extra flags */ + struct spa_point position; /**< position on screen */ + struct spa_point hotspot; /**< offsets for hotspot in bitmap, this field has no meaning + * when there is no valid bitmap (see below) */ + uint32_t bitmap_offset; /**< offset of bitmap meta in this structure. When the offset + * is 0, there is no new bitmap information. When the offset is + * >= sizeof(struct spa_meta_cursor) there is a + * struct spa_meta_bitmap at the offset. */ +}; + +/** a timed set of events associated with the buffer */ +struct spa_meta_control { + struct spa_pod_sequence sequence; +}; + +/** a busy counter for the buffer */ +struct spa_meta_busy { + uint32_t flags; + uint32_t count; /**< number of users busy with the buffer */ +}; + +/** + * \} + */ + +#ifdef __cplusplus +} /* extern "C" */ +#endif + +#endif /* SPA_META_H */ |