/* * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_DEFS_H #define AVCODEC_DEFS_H
/** * @file * @ingroup libavc * Misc types and constants that do not belong anywhere else.
*/
#include <stdint.h> #include <stdlib.h>
/** * @ingroup lavc_decoding * Required number of additionally allocated bytes at the end of the input bitstream for decoding. * This is mainly needed because some optimized bitstream readers read * 32 or 64 bit at once and could read over the end.<br> * Note: If the first 23 bits of the additional bytes are not 0, then damaged * MPEG bitstreams could cause overread and segfault.
*/ #define AV_INPUT_BUFFER_PADDING_SIZE 64
/** * Verify checksums embedded in the bitstream (could be of either encoded or * decoded data, depending on the format) and print an error message on mismatch. * If AV_EF_EXPLODE is also set, a mismatching checksum will result in the * decoder/demuxer returning an error.
*/ #define AV_EF_CRCCHECK (1<<0) #define AV_EF_BITSTREAM (1<<1) ///< detect bitstream specification deviations #define AV_EF_BUFFER (1<<2) ///< detect improper bitstream length #define AV_EF_EXPLODE (1<<3) ///< abort decoding on minor error detection
#define AV_EF_IGNORE_ERR (1<<15) ///< ignore errors and continue #define AV_EF_CAREFUL (1<<16) ///< consider things that violate the spec, are fast to calculate and have not been seen in the wild as errors #define AV_EF_COMPLIANT (1<<17) ///< consider all spec non compliances as errors #define AV_EF_AGGRESSIVE (1<<18) ///< consider things that a sane encoder/muxer should not do as an error
#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software. #define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences. #define FF_COMPLIANCE_NORMAL 0 #define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
enum AVFieldOrder {
AV_FIELD_UNKNOWN,
AV_FIELD_PROGRESSIVE,
AV_FIELD_TT, ///< Top coded_first, top displayed first
AV_FIELD_BB, ///< Bottom coded first, bottom displayed first
AV_FIELD_TB, ///< Top coded first, bottom displayed first
AV_FIELD_BT, ///< Bottom coded first, top displayed first
};
/** * @ingroup lavc_decoding
*/ enum AVDiscard{ /* We leave some space between them for extensions (drop some
* keyframes for intra-only or drop just some bidir frames). */
AVDISCARD_NONE =-16, ///< discard nothing
AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi
AVDISCARD_NONREF = 8, ///< discard all non reference
AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
AVDISCARD_NONINTRA= 24, ///< discard all non intra frames
AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
AVDISCARD_ALL = 48, ///< discard all
};
enum AVAudioServiceType {
AV_AUDIO_SERVICE_TYPE_MAIN = 0,
AV_AUDIO_SERVICE_TYPE_EFFECTS = 1,
AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2,
AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3,
AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4,
AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5,
AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6,
AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7,
AV_AUDIO_SERVICE_TYPE_KARAOKE = 8,
AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI
};
/** * Pan Scan area. * This specifies the area which should be displayed. * Note there may be multiple such areas for one frame.
*/ typedefstruct AVPanScan { /** * id * - encoding: Set by user. * - decoding: Set by libavcodec.
*/ int id;
/** * width and height in 1/16 pel * - encoding: Set by user. * - decoding: Set by libavcodec.
*/ int width; int height;
/** * position of the top left corner in 1/16 pel for up to 3 fields/frames * - encoding: Set by user. * - decoding: Set by libavcodec.
*/
int16_t position[3][2];
} AVPanScan;
/** * This structure describes the bitrate properties of an encoded bitstream. It * roughly corresponds to a subset the VBV parameters for MPEG-2 or HRD * parameters for H.264/HEVC.
*/ typedefstruct AVCPBProperties { /** * Maximum bitrate of the stream, in bits per second. * Zero if unknown or unspecified.
*/
int64_t max_bitrate; /** * Minimum bitrate of the stream, in bits per second. * Zero if unknown or unspecified.
*/
int64_t min_bitrate; /** * Average bitrate of the stream, in bits per second. * Zero if unknown or unspecified.
*/
int64_t avg_bitrate;
/** * The size of the buffer to which the ratecontrol is applied, in bits. * Zero if unknown or unspecified.
*/
int64_t buffer_size;
/** * The delay between the time the packet this structure is associated with * is received and the time when it should be decoded, in periods of a 27MHz * clock. * * UINT64_MAX when unknown or unspecified.
*/
uint64_t vbv_delay;
} AVCPBProperties;
/** * Allocate a CPB properties structure and initialize its fields to default * values. * * @param size if non-NULL, the size of the allocated struct will be written * here. This is useful for embedding it in side data. * * @return the newly allocated struct or NULL on failure
*/
AVCPBProperties *av_cpb_properties_alloc(size_t *size);
/** * This structure supplies correlation between a packet timestamp and a wall clock * production time. The definition follows the Producer Reference Time ('prft') * as defined in ISO/IEC 14496-12
*/ typedefstruct AVProducerReferenceTime { /** * A UTC timestamp, in microseconds, since Unix epoch (e.g, av_gettime()).
*/
int64_t wallclock; int flags;
} AVProducerReferenceTime;
/** * Encode extradata length to a buffer. Used by xiph codecs. * * @param s buffer to write to; must be at least (v/255+1) bytes long * @param v size of extradata in bytes * @return number of bytes written to the buffer.
*/ unsignedint av_xiphlacing(unsignedchar *s, unsignedint v);
#endif// AVCODEC_DEFS_H
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