2 Copyright (c) 2012, Broadcom Europe Ltd
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27 #ifndef VC_CONTAINERS_H
28 #define VC_CONTAINERS_H
30 /** \file containers.h
31 * Public API for container readers and writers
38 #include "containers/containers_types.h"
40 /** \defgroup VcContainerApi Container API
41 * API for container readers and writers */
44 /** Status codes returned by the container API */
47 VC_CONTAINER_SUCCESS = 0, /**< No error */
48 VC_CONTAINER_ERROR_FORMAT_NOT_SUPPORTED, /**< Format of container is not supported */
49 VC_CONTAINER_ERROR_FORMAT_FEATURE_NOT_SUPPORTED, /**< Format of container uses unsupported features */
50 VC_CONTAINER_ERROR_FORMAT_INVALID, /**< Format of container is invalid */
51 VC_CONTAINER_ERROR_CORRUPTED, /**< Container is corrupted */
52 VC_CONTAINER_ERROR_URI_NOT_FOUND, /**< URI could not be found */
53 VC_CONTAINER_ERROR_URI_OPEN_FAILED, /**< URI could not be opened */
54 VC_CONTAINER_ERROR_OUT_OF_MEMORY, /**< Out of memory */
55 VC_CONTAINER_ERROR_OUT_OF_SPACE, /**< Out of disk space (used when writing) */
56 VC_CONTAINER_ERROR_OUT_OF_RESOURCES, /**< Out of resources (other than memory) */
57 VC_CONTAINER_ERROR_EOS, /**< End of stream reached */
58 VC_CONTAINER_ERROR_LIMIT_REACHED, /**< User defined limit reached (used when writing) */
59 VC_CONTAINER_ERROR_BUFFER_TOO_SMALL, /**< Given buffer is too small for data to be copied */
60 VC_CONTAINER_ERROR_INCOMPLETE_DATA, /**< Requested data is incomplete */
61 VC_CONTAINER_ERROR_NO_TRACK_AVAILABLE, /**< Container doesn't have any track */
62 VC_CONTAINER_ERROR_TRACK_FORMAT_NOT_SUPPORTED, /**< Format of the track is not supported */
63 VC_CONTAINER_ERROR_UNSUPPORTED_OPERATION, /**< The requested operation is not supported */
64 VC_CONTAINER_ERROR_INVALID_ARGUMENT, /**< The argument provided is invalid */
65 VC_CONTAINER_ERROR_CONTINUE, /**< The requested operation was interrupted and needs to be tried again */
66 VC_CONTAINER_ERROR_ABORTED, /**< The requested operation was aborted */
67 VC_CONTAINER_ERROR_NOT_FOUND, /**< The requested data was not found */
68 VC_CONTAINER_ERROR_DRM_NOT_AUTHORIZED, /**< The DRM was not authorized */
69 VC_CONTAINER_ERROR_DRM_EXPIRED, /**< The DRM has expired */
70 VC_CONTAINER_ERROR_DRM_FAILED, /**< Generic DRM error */
71 VC_CONTAINER_ERROR_FAILED, /**< Generic error */
72 VC_CONTAINER_ERROR_NOT_READY /**< The container was not yet able to carry out the operation. */
73 } VC_CONTAINER_STATUS_T;
75 /** Four Character Code type used to identify codecs, etc. */
76 typedef uint32_t VC_CONTAINER_FOURCC_T;
78 /** Type definition for language codes.
79 * Language are defined as ISO639 Alpha-3 codes (http://en.wikipedia.org/wiki/List_of_ISO_639-2_codes) */
80 typedef uint8_t VC_CONTAINER_LANGUAGE_T[3];
82 /** Enumeration of the character encodings supported. */
84 VC_CONTAINER_CHAR_ENCODING_UNKNOWN = 0, /**< Encoding is unknown */
85 VC_CONTAINER_CHAR_ENCODING_UTF8 /**< UTF8 encoding */
86 } VC_CONTAINER_CHAR_ENCODING_T;
88 /** \name Container Capabilities
89 * The following flags are exported by containers to describe their capabilities */
91 /** Type definition for container capabilities */
92 typedef uint32_t VC_CONTAINER_CAPABILITIES_T;
93 /** The container can seek */
94 #define VC_CONTAINER_CAPS_CAN_SEEK 0x1
95 /** Seeking is fast. The absence of this flag can be used as a hint to avoid seeking as much as possible */
96 #define VC_CONTAINER_CAPS_SEEK_IS_FAST 0x2
97 /** The container controls the pace at which it is reading the data */
98 #define VC_CONTAINER_CAPS_CAN_CONTROL_PACE 0x4
99 /** The container provides an index. This basically means that seeking will be precise and fast */
100 #define VC_CONTAINER_CAPS_HAS_INDEX 0x8
101 /** The container provides keyframe information */
102 #define VC_CONTAINER_CAPS_DATA_HAS_KEYFRAME_FLAG 0x10
103 /** The container supports adding tracks after TRACK_ADD_DONE control message has been sent */
104 #define VC_CONTAINER_CAPS_DYNAMIC_TRACK_ADD 0x20
105 /** The container supports forcing reading of a given track */
106 #define VC_CONTAINER_CAPS_FORCE_TRACK 0x40
109 /** \defgroup VcContainerMetadata Container Metadata
110 * Container metadata contains descriptive information which is associated with the multimedia data */
113 /** Enumeration of the different metadata keys available. */
115 /* Metadata of global scope */
116 VC_CONTAINER_METADATA_KEY_TITLE = VC_FOURCC('t','i','t','l'),
117 VC_CONTAINER_METADATA_KEY_ARTIST = VC_FOURCC('a','r','t','i'),
118 VC_CONTAINER_METADATA_KEY_ALBUM = VC_FOURCC('a','l','b','m'),
119 VC_CONTAINER_METADATA_KEY_DESCRIPTION = VC_FOURCC('d','e','s','c'),
120 VC_CONTAINER_METADATA_KEY_YEAR = VC_FOURCC('y','e','a','r'),
121 VC_CONTAINER_METADATA_KEY_GENRE = VC_FOURCC('g','e','n','r'),
122 VC_CONTAINER_METADATA_KEY_TRACK = VC_FOURCC('t','r','a','k'),
123 VC_CONTAINER_METADATA_KEY_LYRICS = VC_FOURCC('l','y','r','x'),
125 VC_CONTAINER_METADATA_KEY_UNKNOWN = 0
127 } VC_CONTAINER_METADATA_KEY_T;
129 /** Definition of the metadata type.
130 * This type is used to store one element of metadata */
131 typedef struct VC_CONTAINER_METADATA_T
133 /** Identifier for the type of metadata the value refers to.
134 * Using an enum for the id will mean that a list of possible values will have to be
135 * defined and maintained. This might limit extensibility and customisation.\n
136 * Maybe it would be better to use a FOURCC or even a string here. */
137 VC_CONTAINER_METADATA_KEY_T key;
139 VC_CONTAINER_LANGUAGE_T language; /**< Language code for the metadata */
140 VC_CONTAINER_CHAR_ENCODING_T encoding; /**< Encoding of the metadata */
142 /** Metadata value. This value is defined as null-terminated UTF-8 string.\n
143 * Do we want to support other types than strings (e.g. integer) ?\n
144 * We need an encoding conversion library! */
147 /** Size of the memory area reserved for metadata value (including any
148 * terminating characters). */
150 } VC_CONTAINER_METADATA_T;
153 /** \defgroup VcContainerESFormat Container Elementary Stream Format
154 * This describes the format of an elementary stream associated with a track */
157 /** Enumeration of the different types of elementary streams.
158 * This divides elementary streams into 4 big categories. */
161 VC_CONTAINER_ES_TYPE_UNKNOWN, /**< Unknown elementary stream type */
162 VC_CONTAINER_ES_TYPE_AUDIO, /**< Audio elementary stream */
163 VC_CONTAINER_ES_TYPE_VIDEO, /**< Video elementary stream */
164 VC_CONTAINER_ES_TYPE_SUBPICTURE /**< Sub-picture elementary stream (e.g. subtitles, overlays) */
166 } VC_CONTAINER_ES_TYPE_T;
168 /** Definition of a video format.
169 * This describes the properties specific to a video stream */
170 typedef struct VC_CONTAINER_VIDEO_FORMAT_T
172 uint32_t width; /**< Width of the frame */
173 uint32_t height; /**< Height of the frame */
174 uint32_t visible_width; /**< Width of the visible area of the frame */
175 uint32_t visible_height; /**< Height of the visible area of the frame */
176 uint32_t x_offset; /**< Offset to the start of the visible width */
177 uint32_t y_offset; /**< Offset to the start of the visible height */
178 uint32_t frame_rate_num; /**< Frame rate numerator */
179 uint32_t frame_rate_den; /**< Frame rate denominator */
180 uint32_t par_num; /**< Pixel aspect ratio numerator */
181 uint32_t par_den; /**< Pixel aspect ratio denominator */
182 } VC_CONTAINER_VIDEO_FORMAT_T;
184 /** Enumeration for the different channel locations */
187 VC_CONTAINER_AUDIO_CHANNEL_LEFT = 0, /**< Left channel */
188 VC_CONTAINER_AUDIO_CHANNEL_RIGHT, /**< Right channel */
189 VC_CONTAINER_AUDIO_CHANNEL_CENTER, /**< Center channel */
190 VC_CONTAINER_AUDIO_CHANNEL_LOW_FREQUENCY, /**< Low frequency channel */
191 VC_CONTAINER_AUDIO_CHANNEL_BACK_LEFT, /**< Back left channel */
192 VC_CONTAINER_AUDIO_CHANNEL_BACK_RIGHT, /**< Back right channel */
193 VC_CONTAINER_AUDIO_CHANNEL_BACK_CENTER, /**< Back center channel */
194 VC_CONTAINER_AUDIO_CHANNEL_SIDE_LEFT, /**< Side left channel */
195 VC_CONTAINER_AUDIO_CHANNEL_SIDE_RIGHT, /**< Side right channel */
197 VC_CONTAINER_AUDIO_CHANNELS_MAX = 32 /**< Maximum number of channels supported */
199 } VC_CONTAINER_AUDIO_CHANNEL_T;
201 /** \name Audio format flags
202 * \anchor audioformatflags
203 * The following flags describe properties of an audio stream */
205 #define VC_CONTAINER_AUDIO_FORMAT_FLAG_CHANNEL_MAPPING 0x1 /**< Channel mapping available */
208 /** Definition of an audio format.
209 * This describes the properties specific to an audio stream */
210 typedef struct VC_CONTAINER_AUDIO_FORMAT_T
212 uint32_t channels; /**< Number of audio channels */
213 uint32_t sample_rate; /**< Sample rate */
215 uint32_t bits_per_sample; /**< Bits per sample */
216 uint32_t block_align; /**< Size of a block of data */
218 uint32_t flags; /**< Flags describing the audio format.
219 * See \ref audioformatflags "Audio format flags". */
221 /** Mapping of the channels in order of appearance */
222 VC_CONTAINER_AUDIO_CHANNEL_T channel_mapping[VC_CONTAINER_AUDIO_CHANNELS_MAX];
224 uint16_t gap_delay; /**< Delay introduced by the encoder. Used for gapless playback */
225 uint16_t gap_padding; /**< Padding introduced by the encoder. Used for gapless playback */
227 /** Replay gain information. First element is the track information and the second
228 * is the album information. */
230 float peak; /**< Peak value (full range is 1.0) */
231 float gain; /**< Gain value in dB */
234 } VC_CONTAINER_AUDIO_FORMAT_T;
236 /** Definition of a subpicture format.
237 * This describes the properties specific to a subpicture stream */
238 typedef struct VC_CONTAINER_SUBPICTURE_FORMAT_T
240 VC_CONTAINER_CHAR_ENCODING_T encoding; /**< Encoding for text based subpicture formats */
241 uint32_t x_offset; /**< Width offset to the start of the subpicture */
242 uint32_t y_offset; /**< Height offset to the start of the subpicture */
243 } VC_CONTAINER_SUBPICTURE_FORMAT_T;
245 /** \name Elementary stream format flags
246 * \anchor esformatflags
247 * The following flags describe properties of an elementary stream */
249 #define VC_CONTAINER_ES_FORMAT_FLAG_FRAMED 0x1 /**< Elementary stream is framed */
252 /** Definition of the type specific format.
253 * This describes the type specific information of the elementary stream. */
256 VC_CONTAINER_AUDIO_FORMAT_T audio; /**< Audio specific information */
257 VC_CONTAINER_VIDEO_FORMAT_T video; /**< Video specific information */
258 VC_CONTAINER_SUBPICTURE_FORMAT_T subpicture; /**< Subpicture specific information */
259 } VC_CONTAINER_ES_SPECIFIC_FORMAT_T;
261 /** Definition of an elementary stream format */
262 typedef struct VC_CONTAINER_ES_FORMAT_T
264 VC_CONTAINER_ES_TYPE_T es_type; /**< Type of the elementary stream */
265 VC_CONTAINER_FOURCC_T codec; /**< Coding of the elementary stream */
266 VC_CONTAINER_FOURCC_T codec_variant; /**< If set, indicates a variant of the coding */
268 VC_CONTAINER_ES_SPECIFIC_FORMAT_T *type; /**< Type specific information for the elementary stream */
270 uint32_t bitrate; /**< Bitrate */
272 VC_CONTAINER_LANGUAGE_T language; /**< Language code for the elementary stream */
273 uint32_t group_id; /**< ID of the group this elementary stream belongs to */
275 uint32_t flags; /**< Flags describing the properties of an elementary stream.
276 * See \ref esformatflags "Elementary stream format flags". */
278 unsigned int extradata_size; /**< Size of the codec specific data */
279 uint8_t *extradata; /**< Codec specific data */
281 } VC_CONTAINER_ES_FORMAT_T;
284 /** \defgroup VcContainerPacket Container Packet
285 * A container packet is the unit of data that is being read from or written to a container */
288 /** Structure describing a data packet */
289 typedef struct VC_CONTAINER_PACKET_T
291 struct VC_CONTAINER_PACKET_T *next; /**< Used to build lists of packets */
292 uint8_t *data; /**< Pointer to the buffer containing the actual data for the packet */
293 unsigned int buffer_size; /**< Size of the p_data buffer. This is used to indicate how much data can be read in p_data */
294 unsigned int size; /**< Size of the data contained in p_data */
295 unsigned int frame_size; /**< If set, indicates the size of the frame this packet belongs to */
296 int64_t pts; /**< Presentation Timestamp of the packet */
297 int64_t dts; /**< Decoding Timestamp of the packet */
298 uint64_t num; /**< Number of this packet */
299 uint32_t track; /**< Track associated with this packet */
300 uint32_t flags; /**< Flags associated with this packet */
302 void *user_data; /**< Field reserved for use by the client */
303 void *framework_data; /**< Field reserved for use by the framework */
305 } VC_CONTAINER_PACKET_T;
307 /** \name Container Packet Flags
308 * The following flags describe properties of the data packet */
310 #define VC_CONTAINER_PACKET_FLAG_KEYFRAME 0x01 /**< Packet is a keyframe */
311 #define VC_CONTAINER_PACKET_FLAG_FRAME_START 0x02 /**< Packet starts a frame */
312 #define VC_CONTAINER_PACKET_FLAG_FRAME_END 0x04 /**< Packet ends a frame */
313 #define VC_CONTAINER_PACKET_FLAG_FRAME 0x06 /**< Packet contains only complete frames */
314 #define VC_CONTAINER_PACKET_FLAG_DISCONTINUITY 0x08 /**< Packet comes after a discontinuity in the stream. Decoders might have to be flushed */
315 #define VC_CONTAINER_PACKET_FLAG_ENCRYPTED 0x10 /**< Packet contains DRM encrypted data */
316 #define VC_CONTAINER_PACKET_FLAG_CONFIG 0x20 /**< Packet contains stream specific config data */
319 /** \name Special Unknown Time Value
320 * This is the special value used to signal that a timestamp is not known */
322 #define VC_CONTAINER_TIME_UNKNOWN (INT64_C(1)<<63) /**< Special value for signalling that time is not known */
327 /** \name Track flags
329 * The following flags describe properties of a track */
331 #define VC_CONTAINER_TRACK_FLAG_CHANGED 0x1 /**< Track definition has changed */
334 /** Definition of the track type */
335 typedef struct VC_CONTAINER_TRACK_T
337 struct VC_CONTAINER_TRACK_PRIVATE_T *priv; /**< Private member used by the implementation */
338 uint32_t is_enabled; /**< Flag to specify if the track is enabled */
339 uint32_t flags; /**< Flags describing the properties of a track.
340 * See \ref trackflags "Track flags". */
342 VC_CONTAINER_ES_FORMAT_T *format; /**< Format of the elementary stream contained in the track */
344 unsigned int meta_num; /**< Number of metadata elements associated with the track */
345 VC_CONTAINER_METADATA_T **meta; /**< Array of metadata elements associated with the track */
347 } VC_CONTAINER_TRACK_T;
349 /** Definition of the DRM type */
350 typedef struct VC_CONTAINER_DRM_T
352 VC_CONTAINER_FOURCC_T format; /**< Four character code describing the format of the DRM in use */
353 unsigned int views_max; /**< Maximum number of views allowed */
354 unsigned int views_current; /**< Current number of views */
356 } VC_CONTAINER_DRM_T;
358 /** Type definition for the progress reporting function. This function will be called regularly
359 * by the container during a call which blocks for too long and will report the progress of the
360 * operation as an estimated total length in microseconds and a percentage done.
361 * Returning anything else than VC_CONTAINER_SUCCESS in this function will abort the current
363 typedef VC_CONTAINER_STATUS_T (*VC_CONTAINER_PROGRESS_REPORT_FUNC_T)(void *userdata,
364 int64_t length, unsigned int percentage_done);
366 /** \name Container Events
367 * The following flags are exported by containers to notify the application of events */
369 /** Type definition for container events */
370 typedef uint32_t VC_CONTAINER_EVENTS_T;
371 #define VC_CONTAINER_EVENT_TRACKS_CHANGE 1 /**< Track information has changed */
372 #define VC_CONTAINER_EVENT_METADATA_CHANGE 2 /**< Metadata has changed */
375 /** Definition of the container context */
376 typedef struct VC_CONTAINER_T
378 struct VC_CONTAINER_PRIVATE_T *priv; /**< Private member used by the implementation */
380 VC_CONTAINER_EVENTS_T events; /**< Events generated by the container */
381 VC_CONTAINER_CAPABILITIES_T capabilities; /**< Capabilities exported by the container */
383 VC_CONTAINER_PROGRESS_REPORT_FUNC_T pf_progress; /**< Progress report function pointer */
384 void *progress_userdata; /**< Progress report user data */
386 int64_t duration; /**< Duration of the media in microseconds */
387 int64_t position; /**< Current time position into the media */
388 int64_t size; /**< Size of the media in bytes */
390 unsigned int tracks_num; /**< Number of tracks available */
391 /** Pointer to an array of pointers to track elements.
392 * The reasoning for using a pointer to pointers here is to allow us to extend
393 * VC_CONTAINER_TRACK_T without losing binary backward compatibility. */
394 VC_CONTAINER_TRACK_T **tracks;
396 unsigned int meta_num; /**< Number of metadata elements associated with the container */
397 VC_CONTAINER_METADATA_T **meta; /**< Array of metadata elements associated with the container */
399 VC_CONTAINER_DRM_T *drm; /**< Description used for DRM protected content */
403 /** Forward declaration of a container input / output context.
404 * This structure defines the context for a container io instance */
405 typedef struct VC_CONTAINER_IO_T VC_CONTAINER_IO_T;
407 /** Opens the media container pointed to by the URI for reading.
408 * This will create an an instance of a container reader and its associated context.
409 * The context returned will also be filled with the information retrieved from the media.
411 * If the media isn't accessible or recognized, this will return a null pointer as well as
412 * an error code indicating why this failed.
414 * \param psz_uri Unified Resource Identifier pointing to the media container
415 * \param status Returns the status of the operation
416 * \param pf_progress User provided function pointer to a progress report function. Can be set to
417 * null if no progress report is wanted. This function will be used during
418 * the whole lifetime of the instance (i.e. it will be used during
419 * open / seek / close)
420 * \param progress_userdata User provided pointer that will be passed during the progress report
422 * \return A pointer to the context of the new instance of the
423 * container reader. Returns NULL on failure.
425 VC_CONTAINER_T *vc_container_open_reader( const char *psz_uri, VC_CONTAINER_STATUS_T *status,
426 VC_CONTAINER_PROGRESS_REPORT_FUNC_T pf_progress, void *progress_userdata);
428 /** Opens for reading the media container pointed to by the container i/o.
429 * This will create an an instance of a container reader and its associated context.
430 * The context returned will also be filled with the information retrieved from the media.
432 * If the media isn't accessible or recognized, this will return a null pointer as well as
433 * an error code indicating why this failed.
435 * \param p_io Instance of the container i/o to use
436 * \param psz_uri Unified Resource Identifier pointing to the media container (optional)
437 * \param status Returns the status of the operation
438 * \param pf_progress User provided function pointer to a progress report function. Can be set to
439 * null if no progress report is wanted. This function will be used during
440 * the whole lifetime of the instance (i.e. it will be used during
441 * open / seek / close)
442 * \param progress_userdata User provided pointer that will be passed during the progress report
444 * \return A pointer to the context of the new instance of the
445 * container reader. Returns NULL on failure.
447 VC_CONTAINER_T *vc_container_open_reader_with_io( VC_CONTAINER_IO_T *p_io,
448 const char *psz_uri, VC_CONTAINER_STATUS_T *status,
449 VC_CONTAINER_PROGRESS_REPORT_FUNC_T pf_progress, void *progress_userdata);
451 /** Opens the media container pointed to by the URI for writing.
452 * This will create an an instance of a container writer and its associated context.
453 * The context returned will be initialised to sensible values.
455 * The application will need to add all the media tracks using \ref vc_container_control before
456 * it starts writing data using \ref vc_container_write.
458 * If the media isn't accessible or recognized, this will return a null pointer as well as
459 * an error code indicating why this failed.
461 * \param psz_uri Unified Resource Identifier pointing to the media container
462 * \param status Returns the status of the operation
463 * \param pf_progress User provided function pointer to a progess report function. Can be set to
464 * null if no progress report is wanted.
465 * \param progress_userdata User provided pointer that will be passed during the progress report
467 * \return A pointer to the context of the new instance of the
468 * container writer. Returns NULL on failure.
470 VC_CONTAINER_T *vc_container_open_writer( const char *psz_uri, VC_CONTAINER_STATUS_T *status,
471 VC_CONTAINER_PROGRESS_REPORT_FUNC_T pf_progress, void *progress_userdata);
473 /** Closes an instance of a container reader / writer.
474 * This will free all the resources associated with the context.
476 * \param context Pointer to the context of the instance to close
477 * \return the status of the operation
479 VC_CONTAINER_STATUS_T vc_container_close( VC_CONTAINER_T *context );
481 /** \name Container read flags
482 * The following flags can be passed during a read call */
484 /** Type definition for the read flags */
485 typedef uint32_t VC_CONTAINER_READ_FLAGS_T;
486 /** Ask the container to only return information on the next packet without reading it */
487 #define VC_CONTAINER_READ_FLAG_INFO 1
488 /** Ask the container to skip the next packet */
489 #define VC_CONTAINER_READ_FLAG_SKIP 2
490 /** Force the container to read data from the specified track */
491 #define VC_CONTAINER_READ_FLAG_FORCE_TRACK 4
494 /** Reads a data packet from a container reader.
495 * By default, the reader will read whatever packet comes next in the container and update the
496 * given \ref VC_CONTAINER_PACKET_T structure with this packet's information.
497 * This behaviour can be changed using the \ref VC_CONTAINER_READ_FLAGS_T.\n
498 * \ref VC_CONTAINER_READ_FLAG_INFO will instruct the reader to only return information on the
499 * following packet but not its actual data. The data can be retreived later by issuing another
501 * \ref VC_CONTAINER_READ_FLAG_FORCE_TRACK will force the reader to read the next packet for the
502 * selected track (as present in the \ref VC_CONTAINER_PACKET_T structure) instead of defaulting
503 * to reading the packet which comes next in the container.\n
504 * \ref VC_CONTAINER_READ_FLAG_SKIP will instruct the reader to skip the next packet. In this case
505 * it isn't necessary for the caller to pass a pointer to a \ref VC_CONTAINER_PACKET_T structure
506 * unless the \ref VC_CONTAINER_READ_FLAG_INFO is also given.\n
507 * A combination of all these flags can be used.
509 * \param context Pointer to the context of the reader to use
510 * \param packet Pointer to the VC_CONTAINER_PACKET_T structure describing the data packet
511 * This needs to be partially filled before the call (buffer, buffer_size)
512 * \param flags Flags controlling the read operation
513 * \return the status of the operation
515 VC_CONTAINER_STATUS_T vc_container_read( VC_CONTAINER_T *context,
516 VC_CONTAINER_PACKET_T *packet, VC_CONTAINER_READ_FLAGS_T flags );
518 /** Writes a data packet to a container writer.
520 * \param context Pointer to the context of the writer to use
521 * \param packet Pointer to the VC_CONTAINER_PACKET_T structure describing the data packet
522 * \return the status of the operation
524 VC_CONTAINER_STATUS_T vc_container_write( VC_CONTAINER_T *context,
525 VC_CONTAINER_PACKET_T *packet );
527 /** Definition of the different seek modes */
530 /** The offset provided for seeking is an absolute time offset in microseconds */
531 VC_CONTAINER_SEEK_MODE_TIME = 0,
532 /** The offset provided for seeking is a percentage (Q32 ?) */
533 VC_CONTAINER_SEEK_MODE_PERCENT
535 } VC_CONTAINER_SEEK_MODE_T;
537 /** \name Container Seek Flags
538 * The following flags control seek operations */
540 /** Type definition for the seek flags */
541 typedef uint32_t VC_CONTAINER_SEEK_FLAGS_T;
542 /** Choose precise seeking even if slower */
543 #define VC_CONTAINER_SEEK_FLAG_PRECISE 0x1
544 /** By default a seek will always seek to the keyframe which comes just before the requested
545 * position. This flag allows the caller to force the container to seek to the keyframe which
546 * comes just after the requested position. */
547 #define VC_CONTAINER_SEEK_FLAG_FORWARD 0x2
550 /** Seek into a container reader.
552 * \param context Pointer to the context of the reader to use
553 * \param offset Offset to seek to. Used as an input as well as output value.
554 * \param mode Seeking mode requested.
555 * \param flags Flags affecting the seeking operation.
556 * \return the status of the operation
558 VC_CONTAINER_STATUS_T vc_container_seek( VC_CONTAINER_T *context, int64_t *offset,
559 VC_CONTAINER_SEEK_MODE_T mode, VC_CONTAINER_SEEK_FLAGS_T flags);
561 /** Performance statistics.
563 /** The maximum number of bins a statistics value is held in */
564 #define VC_CONTAINER_STATS_BINS 10
566 /** This type is used to represent multiple values of a statistic.
568 typedef struct VC_CONTAINER_STATS_T
570 /** The number of places to right shift count before using. Resulting values
571 * of zero are rounded to 1. */
574 /** We store VC_CONTAINER_STATS_BINS+1 records, in sorted order of numpc.
575 * At least one will be invalid and all zero. We combine adjacent records
578 /** Sum of count. For single value statistics this is the freqency, for paired statistics
579 * this is the number of bytes written. */
581 /** Number of count. For single value statistics this is the total value, for paired statistics
582 * this is the total length of time. */
584 /** Number>>shift per count. Stored to save recalculation. */
586 } record[VC_CONTAINER_STATS_BINS+1];
587 } VC_CONTAINER_STATS_T;
589 /** This type represents the statistics saved by the io layer. */
590 typedef struct VC_CONTAINER_WRITE_STATS_T
592 /** This logs the number of bytes written in count, and the microseconds taken to write
594 VC_CONTAINER_STATS_T write;
595 /** This logs the length of time the write function has to wait for the asynchronous task. */
596 VC_CONTAINER_STATS_T wait;
597 /** This logs the length of time that we wait for a flush command to complete. */
598 VC_CONTAINER_STATS_T flush;
599 } VC_CONTAINER_WRITE_STATS_T;
602 /** Control operations which can be done on containers. */
605 /** Adds a new track to the list of tracks. This should be used by writers to create
606 * their list of tracks.\n
608 * arg1= VC_CONTAINER_ES_FORMAT_T *: format of the track to add\n
609 * return= VC_CONTAINER_ERROR_TRACK_FORMAT_NOT_SUPPORTED if the format is not supported */
610 VC_CONTAINER_CONTROL_TRACK_ADD = 0,
612 /** Specifies that we're done adding new tracks. This is optional but can be used by writers
613 * to trigger the writing of the container header early. If this isn't used, the header will be
614 * written when the first data packet is received.\n
616 * return= VC_CONTAINER_ERROR_TRACK_FORMAT_NOT_SUPPORTED if the format is not supported */
617 VC_CONTAINER_CONTROL_TRACK_ADD_DONE,
619 /** Change the format of a track in the list of tracks. This should be used by writers to modify
620 * the format of a track at run-time.\n
622 * arg1= unsigned int: index of track to change\n
623 * arg2= VC_CONTAINER_ES_FORMAT_T *: format of the track to add\n
624 * return= VC_CONTAINER_ERROR_TRACK_FORMAT_NOT_SUPPORTED if the format is not supported */
625 VC_CONTAINER_CONTROL_TRACK_CHANGE,
627 /** Deletes a track from the list of tracks. This should be used by writers to delete tracks
628 * during run-time. Note that vc_container_close will automatically delete all track so it
629 * isn't necessary to call this before closing a writer.\n
631 * arg1= index of the track to delete */
632 VC_CONTAINER_CONTROL_TRACK_DEL,
634 /** Activate the playback of DRM protected content.\n
636 * return= one of the VC_CONTAINER_ERROR_DRM error codes if content can't be played */
637 VC_CONTAINER_CONTROL_DRM_PLAY,
640 VC_CONTAINER_CONTROL_METADATA_ADD,
642 VC_CONTAINER_CONTROL_METADATA_CHANGE,
644 VC_CONTAINER_CONTROL_METADATA_DEL,
647 VC_CONTAINER_CONTROL_CHAPTER_ADD,
649 VC_CONTAINER_CONTROL_CHAPTER_DEL,
651 /** Set a maximum size for files generated by writers.\n
653 * arg1= uint64_t: maximum size */
654 VC_CONTAINER_CONTROL_SET_MAXIMUM_SIZE,
656 /** Enables/disabled performance statistic gathering.\n
658 * arg1= bool: enable or disable */
659 VC_CONTAINER_CONTROL_SET_IO_PERF_STATS,
661 /** Collects performance statistics.\n
663 * arg1= VC_CONTAINER_WRITE_STATS_T *: */
664 VC_CONTAINER_CONTROL_GET_IO_PERF_STATS,
668 * arg1= void (*)(void *): callback function
669 * arg1= void *: opaque pointer to pass during the callback */
670 VC_CONTAINER_CONTROL_SET_IO_BUFFER_FULL_CALLBACK,
672 /** Set the I/O read buffer size to be used.\n
674 * arg1= uint32_t: New buffer size in bytes*/
675 VC_CONTAINER_CONTROL_IO_SET_READ_BUFFER_SIZE,
677 /** Set the timeout on I/O read operations, if applicable.\n
679 * arg1= uint32_t: New timeout in milliseconds, or VC_CONTAINER_READ_TIMEOUT_BLOCK */
680 VC_CONTAINER_CONTROL_IO_SET_READ_TIMEOUT_MS,
682 /** Set the timestamp base.\n
683 * The timestamp passed equates to time zero for the stream.\n
685 * arg1= uint32_t: Timestamp base in stream clock units. */
686 VC_CONTAINER_CONTROL_SET_TIMESTAMP_BASE,
688 /** Set the next expected sequence number for the stream.\n
690 * arg1= uint32_t: Next expected sequence number. */
691 VC_CONTAINER_CONTROL_SET_NEXT_SEQUENCE_NUMBER,
693 /** Set the source ID for the container.\n
695 * arg1= uint32_t: Source identifier. */
696 VC_CONTAINER_CONTROL_SET_SOURCE_ID,
699 * arg1= void *: metadata buffer
700 * arg2= unsigned long: length of metadata in bytes */
701 VC_CONTAINER_CONTROL_GET_DRM_METADATA,
704 * arg1= unsigned long: track number
705 * arg2= VC_CONTAINER_FOURCC_T : drm type
706 * arg3= void *: encryption configuration parameters.
707 * arg4= unsigned long: configuration data length */
708 VC_CONTAINER_CONTROL_ENCRYPT_TRACK,
710 /** Causes the io to be flushed.\n
712 VC_CONTAINER_CONTROL_IO_FLUSH,
714 /** Request the container reader to packetize data for the specified track.
716 * arg1= unsigned long: track number
717 * arg2= VC_CONTAINER_FOURCC_T: codec variant to output */
718 VC_CONTAINER_CONTROL_TRACK_PACKETIZE,
720 /** Private user extensions must be above this number */
721 VC_CONTAINER_CONTROL_USER_EXTENSIONS = 0x1000
723 } VC_CONTAINER_CONTROL_T;
725 /** Used with the VC_CONTAINER_CONTROL_IO_SET_READ_TIMEOUT_MS control to indicate the read shall
726 * block until either data is available, or an error occurs.
728 #define VC_CONTAINER_READ_TIMEOUT_BLOCK (uint32_t)(-1)
730 /** Extensible control function for container readers and writers.
731 * This function takes a variable number of arguments which will depend on the specific operation.
733 * \param context Pointer to the VC_CONTAINER_T context to use
734 * \param operation The requested operation
735 * \return the status of the operation. Can be \ref VC_CONTAINER_ERROR_UNSUPPORTED_OPERATION
736 * if the operation is not supported or implemented by the container.
738 VC_CONTAINER_STATUS_T vc_container_control( VC_CONTAINER_T *context, VC_CONTAINER_CONTROL_T operation, ... );
746 #endif /* VC_CONTAINERS_H */