2022-12-18 13:04:20 +00:00
|
|
|
/*
|
|
|
|
* Codec parameters public API
|
|
|
|
*
|
|
|
|
* 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_CODEC_PAR_H
|
|
|
|
#define AVCODEC_CODEC_PAR_H
|
|
|
|
|
|
|
|
#include <stdint.h>
|
|
|
|
|
|
|
|
#include "libavutil/avutil.h"
|
2023-06-16 09:49:59 +00:00
|
|
|
#include "libavutil/channel_layout.h"
|
2022-12-18 13:04:20 +00:00
|
|
|
#include "libavutil/rational.h"
|
|
|
|
#include "libavutil/pixfmt.h"
|
|
|
|
|
|
|
|
#include "codec_id.h"
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @addtogroup lavc_core
|
2023-06-16 09:49:59 +00:00
|
|
|
* @{
|
2022-12-18 13:04:20 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
enum AVFieldOrder {
|
|
|
|
AV_FIELD_UNKNOWN,
|
|
|
|
AV_FIELD_PROGRESSIVE,
|
2023-06-16 09:49:59 +00:00
|
|
|
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
|
2022-12-18 13:04:20 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* This struct describes the properties of an encoded stream.
|
|
|
|
*
|
|
|
|
* sizeof(AVCodecParameters) is not a part of the public ABI, this struct must
|
|
|
|
* be allocated with avcodec_parameters_alloc() and freed with
|
|
|
|
* avcodec_parameters_free().
|
|
|
|
*/
|
|
|
|
typedef struct AVCodecParameters {
|
|
|
|
/**
|
|
|
|
* General type of the encoded data.
|
|
|
|
*/
|
|
|
|
enum AVMediaType codec_type;
|
|
|
|
/**
|
|
|
|
* Specific type of the encoded data (the codec used).
|
|
|
|
*/
|
|
|
|
enum AVCodecID codec_id;
|
|
|
|
/**
|
|
|
|
* Additional information about the codec (corresponds to the AVI FOURCC).
|
|
|
|
*/
|
|
|
|
uint32_t codec_tag;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Extra binary data needed for initializing the decoder, codec-dependent.
|
|
|
|
*
|
|
|
|
* Must be allocated with av_malloc() and will be freed by
|
|
|
|
* avcodec_parameters_free(). The allocated size of extradata must be at
|
|
|
|
* least extradata_size + AV_INPUT_BUFFER_PADDING_SIZE, with the padding
|
|
|
|
* bytes zeroed.
|
|
|
|
*/
|
|
|
|
uint8_t *extradata;
|
|
|
|
/**
|
|
|
|
* Size of the extradata content in bytes.
|
|
|
|
*/
|
|
|
|
int extradata_size;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* - video: the pixel format, the value corresponds to enum AVPixelFormat.
|
|
|
|
* - audio: the sample format, the value corresponds to enum AVSampleFormat.
|
|
|
|
*/
|
|
|
|
int format;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* The average bitrate of the encoded data (in bits per second).
|
|
|
|
*/
|
|
|
|
int64_t bit_rate;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* The number of bits per sample in the codedwords.
|
|
|
|
*
|
|
|
|
* This is basically the bitrate per sample. It is mandatory for a bunch of
|
|
|
|
* formats to actually decode them. It's the number of bits for one sample in
|
|
|
|
* the actual coded bitstream.
|
|
|
|
*
|
|
|
|
* This could be for example 4 for ADPCM
|
|
|
|
* For PCM formats this matches bits_per_raw_sample
|
|
|
|
* Can be 0
|
|
|
|
*/
|
|
|
|
int bits_per_coded_sample;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* This is the number of valid bits in each output sample. If the
|
|
|
|
* sample format has more bits, the least significant bits are additional
|
|
|
|
* padding bits, which are always 0. Use right shifts to reduce the sample
|
|
|
|
* to its actual size. For example, audio formats with 24 bit samples will
|
|
|
|
* have bits_per_raw_sample set to 24, and format set to AV_SAMPLE_FMT_S32.
|
|
|
|
* To get the original sample use "(int32_t)sample >> 8"."
|
|
|
|
*
|
|
|
|
* For ADPCM this might be 12 or 16 or similar
|
|
|
|
* Can be 0
|
|
|
|
*/
|
|
|
|
int bits_per_raw_sample;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Codec-specific bitstream restrictions that the stream conforms to.
|
|
|
|
*/
|
|
|
|
int profile;
|
|
|
|
int level;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Video only. The dimensions of the video frame in pixels.
|
|
|
|
*/
|
|
|
|
int width;
|
|
|
|
int height;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Video only. The aspect ratio (width / height) which a single pixel
|
|
|
|
* should have when displayed.
|
|
|
|
*
|
|
|
|
* When the aspect ratio is unknown / undefined, the numerator should be
|
|
|
|
* set to 0 (the denominator may have any value).
|
|
|
|
*/
|
|
|
|
AVRational sample_aspect_ratio;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Video only. The order of the fields in interlaced video.
|
|
|
|
*/
|
|
|
|
enum AVFieldOrder field_order;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Video only. Additional colorspace characteristics.
|
|
|
|
*/
|
|
|
|
enum AVColorRange color_range;
|
|
|
|
enum AVColorPrimaries color_primaries;
|
|
|
|
enum AVColorTransferCharacteristic color_trc;
|
|
|
|
enum AVColorSpace color_space;
|
|
|
|
enum AVChromaLocation chroma_location;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Video only. Number of delayed frames.
|
|
|
|
*/
|
|
|
|
int video_delay;
|
|
|
|
|
2023-06-16 09:49:59 +00:00
|
|
|
#if FF_API_OLD_CHANNEL_LAYOUT
|
2022-12-18 13:04:20 +00:00
|
|
|
/**
|
|
|
|
* Audio only. The channel layout bitmask. May be 0 if the channel layout is
|
|
|
|
* unknown or unspecified, otherwise the number of bits set must be equal to
|
|
|
|
* the channels field.
|
2023-06-16 09:49:59 +00:00
|
|
|
* @deprecated use ch_layout
|
2022-12-18 13:04:20 +00:00
|
|
|
*/
|
2023-06-16 09:49:59 +00:00
|
|
|
attribute_deprecated
|
2022-12-18 13:04:20 +00:00
|
|
|
uint64_t channel_layout;
|
|
|
|
/**
|
|
|
|
* Audio only. The number of audio channels.
|
2023-06-16 09:49:59 +00:00
|
|
|
* @deprecated use ch_layout.nb_channels
|
2022-12-18 13:04:20 +00:00
|
|
|
*/
|
2023-06-16 09:49:59 +00:00
|
|
|
attribute_deprecated
|
2022-12-18 13:04:20 +00:00
|
|
|
int channels;
|
2023-06-16 09:49:59 +00:00
|
|
|
#endif
|
2022-12-18 13:04:20 +00:00
|
|
|
/**
|
|
|
|
* Audio only. The number of audio samples per second.
|
|
|
|
*/
|
|
|
|
int sample_rate;
|
|
|
|
/**
|
|
|
|
* Audio only. The number of bytes per coded audio frame, required by some
|
|
|
|
* formats.
|
|
|
|
*
|
|
|
|
* Corresponds to nBlockAlign in WAVEFORMATEX.
|
|
|
|
*/
|
|
|
|
int block_align;
|
|
|
|
/**
|
|
|
|
* Audio only. Audio frame size, if known. Required by some formats to be static.
|
|
|
|
*/
|
|
|
|
int frame_size;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Audio only. The amount of padding (in samples) inserted by the encoder at
|
|
|
|
* the beginning of the audio. I.e. this number of leading decoded samples
|
|
|
|
* must be discarded by the caller to get the original audio without leading
|
|
|
|
* padding.
|
|
|
|
*/
|
|
|
|
int initial_padding;
|
|
|
|
/**
|
|
|
|
* Audio only. The amount of padding (in samples) appended by the encoder to
|
|
|
|
* the end of the audio. I.e. this number of decoded samples must be
|
|
|
|
* discarded by the caller from the end of the stream to get the original
|
|
|
|
* audio without any trailing padding.
|
|
|
|
*/
|
|
|
|
int trailing_padding;
|
|
|
|
/**
|
|
|
|
* Audio only. Number of samples to skip after a discontinuity.
|
|
|
|
*/
|
|
|
|
int seek_preroll;
|
2023-06-16 09:49:59 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Audio only. The channel layout and number of channels.
|
|
|
|
*/
|
|
|
|
AVChannelLayout ch_layout;
|
2022-12-18 13:04:20 +00:00
|
|
|
} AVCodecParameters;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Allocate a new AVCodecParameters and set its fields to default values
|
|
|
|
* (unknown/invalid/0). The returned struct must be freed with
|
|
|
|
* avcodec_parameters_free().
|
|
|
|
*/
|
|
|
|
AVCodecParameters *avcodec_parameters_alloc(void);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Free an AVCodecParameters instance and everything associated with it and
|
|
|
|
* write NULL to the supplied pointer.
|
|
|
|
*/
|
|
|
|
void avcodec_parameters_free(AVCodecParameters **par);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Copy the contents of src to dst. Any allocated fields in dst are freed and
|
|
|
|
* replaced with newly allocated duplicates of the corresponding fields in src.
|
|
|
|
*
|
|
|
|
* @return >= 0 on success, a negative AVERROR code on failure.
|
|
|
|
*/
|
|
|
|
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src);
|
|
|
|
|
2023-06-16 09:49:59 +00:00
|
|
|
/**
|
|
|
|
* This function is the same as av_get_audio_frame_duration(), except it works
|
|
|
|
* with AVCodecParameters instead of an AVCodecContext.
|
|
|
|
*/
|
|
|
|
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes);
|
2022-12-18 13:04:20 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @}
|
|
|
|
*/
|
|
|
|
|
|
|
|
#endif // AVCODEC_CODEC_PAR_H
|