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haiku/headers/os/media/MediaDefs.h
Marcus Overhagen 0a00d23f2e Reworked media_format meta data handling. 
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17458 a95241bf-73f2-0310-859d-f6bbb57e9c96
2006-05-14 22:51:14 +00:00

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/*******************************************************************************
/
/ File: MediaDefs.h
/
/ Description: Basic data types and defines for the Media Kit.
/
/ Copyright 1997-1999, Be Incorporated, All Rights Reserved
/
*******************************************************************************/
#if !defined(_MEDIA_DEFS_H)
#define _MEDIA_DEFS_H
#include <BeBuild.h>
#include <SupportDefs.h>
#include <OS.h>
#include <ByteOrder.h>
#if defined(__cplusplus)
#include <GraphicsDefs.h>
#include <Looper.h>
#endif
#define B_MEDIA_NAME_LENGTH 64
enum { /* maybe migrate these into Errors.h */
B_MEDIA_SYSTEM_FAILURE = (int)B_MEDIA_ERROR_BASE+0x100, /* 80004100 */
B_MEDIA_BAD_NODE,
B_MEDIA_NODE_BUSY,
B_MEDIA_BAD_FORMAT,
B_MEDIA_BAD_BUFFER,
B_MEDIA_TOO_MANY_NODES,
B_MEDIA_TOO_MANY_BUFFERS,
B_MEDIA_NODE_ALREADY_EXISTS,
B_MEDIA_BUFFER_ALREADY_EXISTS,
B_MEDIA_CANNOT_SEEK,
B_MEDIA_CANNOT_CHANGE_RUN_MODE,
B_MEDIA_APP_ALREADY_REGISTERED,
B_MEDIA_APP_NOT_REGISTERED,
B_MEDIA_CANNOT_RECLAIM_BUFFERS,
B_MEDIA_BUFFERS_NOT_RECLAIMED,
B_MEDIA_TIME_SOURCE_STOPPED,
B_MEDIA_TIME_SOURCE_BUSY, /* 80004110 */
B_MEDIA_BAD_SOURCE,
B_MEDIA_BAD_DESTINATION,
B_MEDIA_ALREADY_CONNECTED,
B_MEDIA_NOT_CONNECTED,
B_MEDIA_BAD_CLIP_FORMAT,
B_MEDIA_ADDON_FAILED,
B_MEDIA_ADDON_DISABLED,
B_MEDIA_CHANGE_IN_PROGRESS,
B_MEDIA_STALE_CHANGE_COUNT,
B_MEDIA_ADDON_RESTRICTED,
B_MEDIA_NO_HANDLER,
B_MEDIA_DUPLICATE_FORMAT,
B_MEDIA_REALTIME_DISABLED,
B_MEDIA_REALTIME_UNAVAILABLE
};
/* Notification message 'what's */
enum {
// Note that BMediaNode::node_error also belongs in here! */
B_MEDIA_WILDCARD = 'TRWC', /* used to match any notification in Start/StopWatching */
B_MEDIA_NODE_CREATED = 'TRIA', /* "media_node_id" (multiple items) */
B_MEDIA_NODE_DELETED, /* "media_node_id" (multiple items) */
B_MEDIA_CONNECTION_MADE, /* "output", "input", "format" */
B_MEDIA_CONNECTION_BROKEN, /* "source", "destination" */
B_MEDIA_BUFFER_CREATED, /* "clone_info" -- handled by BMediaRoster */
B_MEDIA_BUFFER_DELETED, /* "media_buffer_id" -- handled by BMediaRoster */
B_MEDIA_TRANSPORT_STATE, /* "state", "location", "realtime" */
B_MEDIA_PARAMETER_CHANGED, /* N "node", "parameter" */
B_MEDIA_FORMAT_CHANGED, /* N "source", "destination", "format" */
B_MEDIA_WEB_CHANGED, /* N "node" */
B_MEDIA_DEFAULT_CHANGED, /* "default", "node" -- handled by BMediaRoster */
B_MEDIA_NEW_PARAMETER_VALUE, /* N "node", "parameter", "when", "value" */
B_MEDIA_NODE_STOPPED, /* N "node", "when" */
B_MEDIA_FLAVORS_CHANGED /* "be:addon_id", "be:new_count", "be:gone_count" */
};
enum media_type {
B_MEDIA_NO_TYPE = -1,
B_MEDIA_UNKNOWN_TYPE = 0,
B_MEDIA_RAW_AUDIO = 1, /* uncompressed raw_audio -- linear relationship bytes <-> samples */
B_MEDIA_RAW_VIDEO, /* uncompressed raw_video -- linear relationship bytes <-> pixels */
B_MEDIA_VBL, /* raw data from VBL area, 1600/line */
B_MEDIA_TIMECODE, /* data format TBD */
B_MEDIA_MIDI,
B_MEDIA_TEXT, /* typically closed captioning */
B_MEDIA_HTML,
B_MEDIA_MULTISTREAM, /* AVI, etc */
B_MEDIA_PARAMETERS, /* BControllable change data */
B_MEDIA_ENCODED_AUDIO, /* dts, AC3, ... */
B_MEDIA_ENCODED_VIDEO, /* Indeo, MPEG, ... */
B_MEDIA_PRIVATE = 90000, /* Don't touch! */
B_MEDIA_FIRST_USER_TYPE = 100000 /* Use something bigger than this for */
/* experimentation with your own media forms */
};
enum node_kind {
B_BUFFER_PRODUCER = 0x1,
B_BUFFER_CONSUMER = 0x2,
B_TIME_SOURCE = 0x4,
B_CONTROLLABLE = 0x8,
B_FILE_INTERFACE = 0x10,
B_ENTITY_INTERFACE = 0x20,
/* Set these flags for nodes that are suitable as default entities */
B_PHYSICAL_INPUT = 0x10000,
B_PHYSICAL_OUTPUT = 0x20000,
B_SYSTEM_MIXER = 0x40000
};
enum video_orientation { /* for orientation, which pixel is first and how do we scan each "line"? */
B_VIDEO_TOP_LEFT_RIGHT = 1, /* This is the typical progressive scan format */
B_VIDEO_BOTTOM_LEFT_RIGHT /* This is how BMP and TGA might scan */
};
enum media_flags /* data */
{
B_MEDIA_FLAGS_VERSION = 1, /* uint32, bigger for newer */
B_MEDIA_FLAGS_PRIVATE = 0x40000000 /* private to Be */
};
enum media_producer_status { /* for producer status */
B_DATA_NOT_AVAILABLE = 1,
B_DATA_AVAILABLE = 2,
B_PRODUCER_STOPPED = 3
};
// realtime flags
enum media_realtime_flags {
B_MEDIA_REALTIME_ALLOCATOR = 0x1,
B_MEDIA_REALTIME_AUDIO = 0x2,
B_MEDIA_REALTIME_VIDEO = 0x4,
B_MEDIA_REALTIME_ANYKIND = 0xffff
};
enum media_frame_flags {
B_MEDIA_KEY_FRAME = 0x1
};
#define B_MEDIA_ANY_QUALITY 0.0f
#define B_MEDIA_LOW_QUALITY 0.1f
#define B_MEDIA_MEDIUM_QUALITY 0.5f
#define B_MEDIA_HIGH_QUALITY 1.0f
#if !defined(_MULTI_AUDIO_H) /* #define in protocol header */
enum media_multi_channels {
B_CHANNEL_LEFT = 0x1,
B_CHANNEL_RIGHT = 0x2,
B_CHANNEL_CENTER = 0x4, /* 5.1+ or fake surround */
B_CHANNEL_SUB = 0x8, /* 5.1+ */
B_CHANNEL_REARLEFT = 0x10, /* quad surround or 5.1+ */
B_CHANNEL_REARRIGHT = 0x20, /* quad surround or 5.1+ */
B_CHANNEL_FRONT_LEFT_CENTER = 0x40,
B_CHANNEL_FRONT_RIGHT_CENTER = 0x80,
B_CHANNEL_BACK_CENTER = 0x100, /* 6.1 or fake surround */
B_CHANNEL_SIDE_LEFT = 0x200,
B_CHANNEL_SIDE_RIGHT = 0x400,
B_CHANNEL_TOP_CENTER = 0x800,
B_CHANNEL_TOP_FRONT_LEFT = 0x1000,
B_CHANNEL_TOP_FRONT_CENTER = 0x2000,
B_CHANNEL_TOP_FRONT_RIGHT = 0x4000,
B_CHANNEL_TOP_BACK_LEFT = 0x8000,
B_CHANNEL_TOP_BACK_CENTER = 0x10000,
B_CHANNEL_TOP_BACK_RIGHT = 0x20000
};
enum media_multi_matrix {
B_MATRIX_PROLOGIC_LR = 0x1,
B_MATRIX_AMBISONIC_WXYZ = 0x4
};
#endif
typedef int32 media_node_id;
typedef int32 media_buffer_id;
typedef int32 media_addon_id;
#if defined(__cplusplus)
struct media_destination {
media_destination(port_id, int32);
media_destination(const media_destination & clone);
media_destination & operator=(const media_destination & clone);
media_destination();
~media_destination();
port_id port; /* can be different from media_node.port */
int32 id;
static media_destination null;
private:
uint32 _reserved_media_destination_[2];
};
struct media_source {
media_source(port_id, int32);
media_source(const media_source & clone);
media_source & operator=(const media_source & clone);
media_source();
~media_source();
port_id port; /* must be the same as media_node.port for owner */
int32 id;
static media_source null;
private:
uint32 _reserved_media_source_[2];
};
_IMPEXP_MEDIA bool operator==(const media_destination & a, const media_destination & b);
_IMPEXP_MEDIA bool operator!=(const media_destination & a, const media_destination & b);
_IMPEXP_MEDIA bool operator<(const media_destination & a, const media_destination & b);
_IMPEXP_MEDIA bool operator==(const media_source & a, const media_source & b);
_IMPEXP_MEDIA bool operator!=(const media_source & a, const media_source & b);
_IMPEXP_MEDIA bool operator<(const media_source & a, const media_source & b);
_IMPEXP_MEDIA bool operator==(const media_node & a, const media_node & b);
_IMPEXP_MEDIA bool operator!=(const media_node & a, const media_node & b);
_IMPEXP_MEDIA bool operator<(const media_node & a, const media_node & b);
/* Buffers are low-level constructs identified by an ID. */
/* Buffers consist of the actual data area, plus a 64-byte */
/* header area that is different for each type. */
/* Buffers contain typed data. Type is not part of the */
/* buffer header; it's negotiated out-of-bounds by nodes. */
enum {
B_MEDIA_BIG_ENDIAN = 1,
B_MEDIA_LITTLE_ENDIAN = 2,
#if B_HOST_IS_BENDIAN
B_MEDIA_HOST_ENDIAN = B_MEDIA_BIG_ENDIAN
#else
B_MEDIA_HOST_ENDIAN = B_MEDIA_LITTLE_ENDIAN
#endif
};
struct media_multi_audio_format;
struct media_raw_audio_format {
enum { // for "format"
B_AUDIO_FLOAT = 0x24, // 0 == mid, -1.0 == bottom, 1.0 == top (the preferred format for non-game audio)
B_AUDIO_INT = 0x4, // 0 == mid, 0x80000001 == bottom, 0x7fffffff == top (all >16-bit formats, left-adjusted)
B_AUDIO_SHORT = 0x2, // 0 == mid, -32767 == bottom, +32767 == top
B_AUDIO_UCHAR = 0x11, // 128 == mid, 1 == bottom, 255 == top (discouraged but supported format)
B_AUDIO_CHAR = 0x1, // 0 == mid, -127 == bottom, +127 == top (not officially supported format)
B_AUDIO_SIZE_MASK = 0xf
}; // we guarantee that (format&0xf) == sizeof(sample) for raw formats
float frame_rate;
uint32 channel_count; // 1 or 2, mostly
uint32 format; // for compressed formats, go to media_encoded_audio_format
uint32 byte_order; // 2 for little endian (B_MEDIA_LITTLE_ENDIAN), 1 for big endian (B_MEDIA_BIG_ENDIAN)
size_t buffer_size; // size of each buffer
static media_multi_audio_format wildcard;
};
struct media_audio_header {
// please put actual data at the end
int32 _reserved_[16]; // gotta have something
};
struct media_multi_audio_info {
uint32 channel_mask; // bitmask
int16 valid_bits; // if < 32, for B_AUDIO_INT
uint16 matrix_mask; // each of these bits may mean more than one channel
uint32 _reserved_b[3];
};
#if defined(__cplusplus)
struct media_multi_audio_format : public media_raw_audio_format, public media_multi_audio_info {
static media_multi_audio_format wildcard;
};
#else
struct media_multi_audio_format {
media_raw_audio_format raw;
media_multi_audio_info multi;
};
#endif
struct media_encoded_audio_format {
enum audio_encoding {
B_ANY
};
media_raw_audio_format output;
audio_encoding encoding;
float bit_rate; // BIT rate, not byte rate
size_t frame_size;
media_multi_audio_info multi_info;
uint32 _reserved_[3];
static media_encoded_audio_format wildcard;
};
struct media_encoded_audio_header {
// please put actual data at the end
int32 _reserved_0[14]; // gotta have something
uint32 buffer_flags; // B_MEDIA_KEY_FRAME for key buffers (ADPCM etc)
uchar unused_mask; // mask of unused bits for the last byte of data
uchar _reserved_2[3];
};
enum media_display_flags {
B_F1_DOMINANT = 0x1, // The first buffer sent (temporally) will be an F1 field
B_F2_DOMINANT = 0x2, // The first buffer sent (temporally) will be an F2 field
B_TOP_SCANLINE_F1 = 0x4, // The topmost scanline of the output buffer belongs to F1
B_TOP_SCANLINE_F2 = 0x8 // The topmost scanline of the output buffer belongs to F2
};
struct media_video_display_info {
color_space format;
uint32 line_width;
uint32 line_count; // total of all interlace fields
uint32 bytes_per_row; // bytes_per_row is in format, not header, because it's part of SetBuffers
uint32 pixel_offset; // (in pixels) ... These are offsets from the start of the buffer ...
uint32 line_offset; // (in lines) ... to the start of the field. Think "buffer == framebuffer" ...
// ... when the window displaying the active field moves on screen.
uint32 flags;
uint32 _reserved_[3];
static media_video_display_info wildcard;
};
struct media_raw_video_format {
float field_rate;
uint32 interlace; // how many fields per frame -- 1 means progressive (non-interlaced)
uint32 first_active; // 0, typically (wildcard, or "don't care")
uint32 last_active; // line_count-1, if first_active is 0.
uint32 orientation; // B_VIDEO_TOP_LEFT_RIGHT is preferred
// PIXEL aspect ratio; not active area aspect ratio...
uint16 pixel_width_aspect; // 1:1 has 1 here, 4:3 has 4 here
uint16 pixel_height_aspect; // 1:1 has 1 here, 4:3 has 3 here
media_video_display_info display;
static media_raw_video_format wildcard;
};
struct media_video_header {
uint32 _reserved_[12]; // at the top to push used data to the end
float field_gamma;
uint32 field_sequence; // sequence since start of capture -- may roll over if machine is on for a LONG time
uint16 field_number; // 0 .. {interlace-1}; F1 == 0 ("odd"), F2 == 1 ("even")
uint16 pulldown_number; // 0..2 for pulldown duplicated sequence
uint16 first_active_line; // the NTSC/PAL line number (1-based) of the first line in this field
uint16 line_count; // number of active lines in buffer
};
struct media_encoded_video_format {
enum video_encoding {
B_ANY
};
media_raw_video_format output; // set unknowns to wildcard
float avg_bit_rate;
float max_bit_rate;
video_encoding encoding;
size_t frame_size;
int16 forward_history; // maximum forward memory required by algorithm
int16 backward_history; // maximum backward memory required by algorithm
uint32 _reserved_[3]; // can't grow more than this
static media_encoded_video_format wildcard;
};
struct media_encoded_video_header {
/* please put actual data at the end */
int32 _reserved_1[9]; // gotta have something...
uint32 field_flags; // B_MEDIA_KEY_FRAME
int16 forward_history; // forward memory required by this buffer (0 for key frames)
int16 backward_history; // backward memory required by this buffer (0 for key frames)
uchar unused_mask; // mask of unused bits for the last byte of data
uchar _reserved_2[3];
float field_gamma;
uint32 field_sequence; // sequence since start of capture
uint16 field_number; // 0 .. {interlace-1}; F1 == 0, F2 == 1
uint16 pulldown_number; // 0..2 for pulldown duplicated sequence
uint16 first_active_line; // 0 or 1, typically, but could be 10 or 11 for full-NTSC formats
uint16 line_count; // number of actual lines in buffer
};
struct media_multistream_format {
enum {
B_ANY = 0,
B_VID = 1, // raw raw_video/raw_audio buffers
B_AVI,
B_MPEG1,
B_MPEG2,
B_QUICKTIME,
B_PRIVATE = 90000,
B_FIRST_USER_TYPE = 100000 // user formats >= 100000
};
float avg_bit_rate; // 8 * byte rate, on average
float max_bit_rate; // 8 * byte rate, tops
uint32 avg_chunk_size; // == max_chunk_size for fixed-size chunks
uint32 max_chunk_size; // max buffer size
enum {
B_HEADER_HAS_FLAGS = 0x1, // are flags important?
B_CLEAN_BUFFERS = 0x2, // each buffer represents an integral number of "frames"
B_HOMOGENOUS_BUFFERS = 0x4 // a buffer has only one format in it
};
uint32 flags;
int32 format;
uint32 _reserved_[2];
struct vid_info {
float frame_rate;
uint16 width;
uint16 height;
color_space space;
float sampling_rate;
uint32 sample_format;
uint16 byte_order;
uint16 channel_count;
};
struct avi_info {
uint32 us_per_frame;
uint16 width;
uint16 height;
uint16 _reserved_;
uint16 type_count;
media_type types[5];
};
union {
vid_info vid;
avi_info avi;
} u;
static media_multistream_format wildcard;
};
struct media_multistream_header {
uint32 _reserved_[14];
uchar unused_mask; // mask of unused bits for the last byte of data
uchar _reserved_2[3];
enum {
B_MASTER_HEADER = 0x1, // for master stream header data in buffer
B_SUBSTREAM_HEADER = 0x2, // for sub-stream header data in buffer
B_COMPLETE_BUFFER = 0x4 // data is an integral number of "frames"
};
uint32 flags;
};
extern const type_code B_CODEC_TYPE_INFO;
enum media_format_flags {
B_MEDIA_RETAINED_DATA = 0x1,
B_MEDIA_MULTIPLE_BUFFERS = 0x2,
B_MEDIA_CONTIGUOUS_BUFFER = 0x4,
B_MEDIA_LINEAR_UPDATES = 0x8,
B_MEDIA_MAUI_UNDEFINED_FLAGS = ~0xf /* always deny these */
};
/* typically, a field of 0 means "anything" or "wildcard" */
struct media_format { /* no more than 192 bytes */
media_type type;
type_code user_data_type;
uchar user_data[48];
uint32 _reserved_[3];
uint16 require_flags; // media_format_flags
uint16 deny_flags; // media_format_flags
private:
void * meta_data;
int32 meta_data_size;
area_id meta_data_area;
area_id __unused_was_use_area;
team_id __unused_was_team;
void * __unused_was_thisPtr;
public:
union {
media_multi_audio_format raw_audio;
media_raw_video_format raw_video;
media_multistream_format multistream;
media_encoded_audio_format encoded_audio;
media_encoded_video_format encoded_video;
char _reserved_[96]; // pad to 96 bytes
} u;
bool IsVideo() const { return (type==B_MEDIA_ENCODED_VIDEO)||(type==B_MEDIA_RAW_VIDEO); };
uint32 Width() const { return (type==B_MEDIA_ENCODED_VIDEO)?u.encoded_video.output.display.line_width:u.raw_video.display.line_width; };
uint32 Height() const { return (type==B_MEDIA_ENCODED_VIDEO)?u.encoded_video.output.display.line_count:u.raw_video.display.line_count; };
color_space ColorSpace() const { return (type==B_MEDIA_ENCODED_VIDEO)?u.encoded_video.output.display.format:u.raw_video.display.format; };
uint32 & Width() { return (type==B_MEDIA_ENCODED_VIDEO)?u.encoded_video.output.display.line_width:u.raw_video.display.line_width; };
uint32 & Height() { return (type==B_MEDIA_ENCODED_VIDEO)?u.encoded_video.output.display.line_count:u.raw_video.display.line_count; };
color_space & ColorSpace() { return (type==B_MEDIA_ENCODED_VIDEO)?u.encoded_video.output.display.format:u.raw_video.display.format; };
bool IsAudio() const { return (type==B_MEDIA_ENCODED_AUDIO)||(type==B_MEDIA_RAW_AUDIO); };
uint32 AudioFormat() const { return (type==B_MEDIA_ENCODED_AUDIO)?u.encoded_audio.output.format:u.raw_audio.format; };
uint32 & AudioFormat() { return (type==B_MEDIA_ENCODED_AUDIO)?u.encoded_audio.output.format:u.raw_audio.format; };
uint32 AudioFrameSize() const { return (type==B_MEDIA_ENCODED_AUDIO)?(u.encoded_audio.output.format & 0xf)*u.encoded_audio.output.channel_count:(u.raw_audio.format & 0xf)*u.raw_audio.channel_count; };
uint32 Encoding() const { return (type==B_MEDIA_ENCODED_VIDEO)?u.encoded_video.encoding:(type==B_MEDIA_ENCODED_AUDIO)?u.encoded_audio.encoding:(type==B_MEDIA_MULTISTREAM)?u.multistream.format:0UL; }
bool Matches(const media_format *otherFormat) const;
void SpecializeTo(const media_format *otherFormat);
status_t SetMetaData(const void *data, size_t size);
const void * MetaData() const;
int32 MetaDataSize() const;
media_format();
media_format(const media_format &other);
~media_format();
media_format & operator=(const media_format & clone);
};
_IMPEXP_MEDIA bool operator==(const media_raw_audio_format & a, const media_raw_audio_format & b);
_IMPEXP_MEDIA bool operator==(const media_multi_audio_info & a, const media_multi_audio_info & b);
_IMPEXP_MEDIA bool operator==(const media_multi_audio_format & a, const media_multi_audio_format & b);
_IMPEXP_MEDIA bool operator==(const media_encoded_audio_format & a, const media_encoded_audio_format & b);
_IMPEXP_MEDIA bool operator==(const media_video_display_info & a, const media_video_display_info & b);
_IMPEXP_MEDIA bool operator==(const media_raw_video_format & a, const media_raw_video_format & b);
_IMPEXP_MEDIA bool operator==(const media_encoded_video_format & a, const media_encoded_video_format & b);
_IMPEXP_MEDIA bool operator==(const media_multistream_format::vid_info & a, const media_multistream_format::vid_info & b);
_IMPEXP_MEDIA bool operator==(const media_multistream_format::avi_info & a, const media_multistream_format::avi_info & b);
_IMPEXP_MEDIA bool operator==(const media_multistream_format & a, const media_multistream_format & b);
_IMPEXP_MEDIA bool operator==(const media_format & a, const media_format & b);
/* return true if a and b are compatible (accounting for wildcards) */
_IMPEXP_MEDIA bool format_is_compatible(const media_format & a, const media_format & b); /* a is the format you want to feed to something accepting b */
_IMPEXP_MEDIA bool string_for_format(const media_format & f, char * buf, size_t size);
struct media_seek_tag {
char data[16];
};
struct media_header_time_code {
int8 type; // See TimeCode.h; don't use the "DEFAULT" value
int8 _reserved;
int8 hours;
int8 minutes;
int8 seconds;
int8 frames;
int16 subframes; // -1 if not available
};
struct media_header { // Broadcast() fills in fields marked with "//+"
media_type type; // what kind of data (for union)
media_buffer_id buffer; //+ what buffer does this header go with?
int32 destination; //+ what 'socket' is this intended for?
media_node_id time_source; // node that encoded start_time
uint32 _deprecated_; // used to be change_tag
uint32 size_used; // size within buffer that is used
bigtime_t start_time; // performance time
area_id owner; //+ buffer owner info area
enum {
B_SEEK_TAG = 'TRST', // user data type of the codec seek
// protocol. size of seek tag is 16 bytes
B_TIME_CODE = 'TRTC' // user data is media_header_time_code
};
type_code user_data_type;
uchar user_data[64]; // user_data_type indicates what this is
uint32 _reserved_[2];
off_t file_pos; // where in a file this data came from
size_t orig_size; // and how big it was. if unused, zero out
uint32 data_offset; // offset within buffer (already reflected in Data())
union {
media_audio_header raw_audio;
media_video_header raw_video;
media_multistream_header multistream;
media_encoded_audio_header encoded_audio;
media_encoded_video_header encoded_video;
char _reserved_[64]; // pad to 64 bytes
} u;
};
struct media_file_format_id {
ino_t node;
dev_t device;
uint32 internal_id;
};
_IMPEXP_MEDIA bool operator==(const media_file_format_id & a, const media_file_format_id & b);
_IMPEXP_MEDIA bool operator<(const media_file_format_id & a, const media_file_format_id & b);
typedef enum {
B_ANY_FORMAT_FAMILY = 0,
B_BEOS_FORMAT_FAMILY = 1,
B_QUICKTIME_FORMAT_FAMILY = 2, /* QuickTime is a registered trademark of Apple Computer */
B_AVI_FORMAT_FAMILY = 3,
B_ASF_FORMAT_FAMILY = 4,
B_MPEG_FORMAT_FAMILY = 5,
B_WAV_FORMAT_FAMILY = 6,
B_AIFF_FORMAT_FAMILY = 7,
B_AVR_FORMAT_FAMILY = 8,
B_MISC_FORMAT_FAMILY = 99999,
} media_format_family;
struct media_file_format {
enum { /* flags */
B_READABLE = 0x1,
B_WRITABLE = 0x2,
B_PERFECTLY_SEEKABLE = 0x4,
B_IMPERFECTLY_SEEKABLE = 0x8,
B_KNOWS_RAW_VIDEO = 0x10,
B_KNOWS_RAW_AUDIO = 0x20,
B_KNOWS_MIDI = 0x40,
B_KNOWS_ENCODED_VIDEO = 0x80,
B_KNOWS_ENCODED_AUDIO = 0x100,
B_KNOWS_OTHER = 0x1000000, /* clipping, text, control, ... */
B_KNOWS_ANYTHING = 0x2000000
};
uint32 capabilities; // can this format support audio, video, etc
media_file_format_id id; // opaque id used to construct a BMediaFile
media_format_family family; // one of the family enums
int32 version; // 100 for 1.0
uint32 _reserved_[25];
char mime_type[64]; // eg: "video/quicktime", "audio/aiff", etc
char pretty_name[64]; // eg: "QuickTime File Format"
char short_name[32]; // eg: "quicktime", "avi", "mpeg"
char file_extension[8]; // eg: "mov", "avi", "mpg"
char reserved[88];
};
//
// Use this function iterate through available file format writers
//
status_t get_next_file_format(int32 *cookie, media_file_format *mfi);
/* This struct is guaranteed to be large enough for any message your service */
/* thread will get for any media_node -- 16k is an upper-bound size limit. */
/* In your thread, read_port() into this struct, and call HandleMessage() on it. */
const size_t B_MEDIA_MESSAGE_SIZE = 16384;
_IMPEXP_MEDIA extern const char * B_MEDIA_SERVER_SIGNATURE;
class media_node; /* found in MediaNode.h */
struct media_input;
struct media_output;
struct live_node_info;
struct dormant_node_info;
struct buffer_clone_info;
// If you for some reason need to get rid of the media_server (and friends)
// use these functions, rather than sending messages yourself.
// The callback will be called for various stages of the process, with 100 meaning completely done
// The callback should always return TRUE for the time being.
status_t shutdown_media_server(bigtime_t timeout = B_INFINITE_TIMEOUT, bool (*progress)(int stage, const char * message, void * cookie) = NULL, void * cookie = NULL);
status_t launch_media_server(uint32 flags = 0);
// Given an image_id, prepare that image_id for realtime media
// If the kind of media indicated by "flags" is not enabled for real-time,
// B_MEDIA_REALTIME_DISABLED is returned.
// If there are not enough system resources to enable real-time performance,
// B_MEDIA_REALTIME_UNAVAILABLE is returned.
status_t media_realtime_init_image(image_id image, uint32 flags);
// Given a thread ID, and an optional indication of what the thread is
// doing in "flags", prepare the thread for real-time media performance.
// Currently, this means locking the thread stack, up to size_used bytes,
// or all of it if 0 is passed. Typically, you will not be using all
// 256 kB of the stack, so you should pass some smaller value you determine
// from profiling the thread; typically in the 32-64kB range.
// Return values are the same as for media_prepare_realtime_image().
status_t media_realtime_init_thread(thread_id thread, size_t stack_used, uint32 flags);
// A teeny bit of legacy preserved for BSoundFile from R3.
// These came from the old MediaDefs.h; don't use them
// unless you get them from BSoundFile.
/* values for byte_ordering */
enum { B_BIG_ENDIAN, B_LITTLE_ENDIAN };
/* values for sample_format */
enum {
B_UNDEFINED_SAMPLES,
B_LINEAR_SAMPLES,
B_FLOAT_SAMPLES,
B_MULAW_SAMPLES
};
/* for encoders and file writers */
struct media_encode_info {
uint32 flags; /* B_MEDIA_KEY_FRAME, set before every use */
int32 used_data_size; /* data size used by other tracks */
/* add output size used by this encoder */
bigtime_t start_time; /* us from start of file */
bigtime_t time_to_encode; /* 0 - hurry up, B_INFINITE_TIMEOUT - don't care */
int32 _pad[22];
void *file_format_data; /* file format specific info */
size_t file_format_data_size;
void *codec_data; /* codec specific info */
size_t codec_data_size;
media_encode_info();
};
struct encode_parameters {
float quality; // 0.0-1.0 , 1.0 is high quality
int32 avg_field_size; // in bytes
int32 max_field_size; // in bytes
int32 _pad[27];
void *user_data; // codec specific info
size_t user_data_size;
};
struct media_decode_info {
bigtime_t time_to_decode; /* 0 - hurry up, B_INFINITE_TIMEOUT - don't care */
int32 _pad[26];
void *file_format_data; /* file format specific info */
size_t file_format_data_size;
void *codec_data; /* codec specific info */
size_t codec_data_size;
media_decode_info();
};
#endif // __cplusplus
#endif /* MEDIA_DEFS_H */
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