FFmpeg
av1.h
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1 /*
2  * AV1 helper functions for muxers
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVFORMAT_AV1_H
22 #define AVFORMAT_AV1_H
23 
24 #include <stdint.h>
25 
26 #include "avio.h"
27 
28 typedef struct AV1SequenceParameters {
43 
44 /**
45  * Filter out AV1 OBUs not meant to be present in ISOBMFF sample data and write
46  * the resulting bitstream to the provided AVIOContext.
47  *
48  * @param pb pointer to the AVIOContext where the filtered bitstream shall be
49  * written
50  * @param buf input data buffer
51  * @param size size of the input data buffer
52  *
53  * @return the amount of bytes written in case of success, a negative AVERROR
54  * code in case of failure
55  */
56 int ff_av1_filter_obus(AVIOContext *pb, const uint8_t *buf, int size);
57 
58 /**
59  * Filter out AV1 OBUs not meant to be present in ISOBMFF sample data and return
60  * the result in a data buffer, avoiding allocations and copies if possible.
61  *
62  * @param in input data buffer
63  * @param out pointer to pointer for the returned buffer. In case of success,
64  * it is independently allocated if and only if `*out` differs from in.
65  * @param size size of the input data buffer. The size of the resulting output
66  * data buffer will be written here
67  * @param offset offset of the returned data inside `*out`: It runs from
68  * `*out + offset` (inclusive) to `*out + offset + size`
69  * (exclusive); is zero if `*out` is independently allocated.
70  *
71  * @return 0 in case of success, a negative AVERROR code in case of failure.
72  * On failure, *out and *size are unchanged
73  * @note *out will be treated as unintialized on input and will not be freed.
74  */
76  int *size, int *offset);
77 
78 /**
79  * Parses a Sequence Header from the the provided buffer.
80  *
81  * @param seq pointer to the AV1SequenceParameters where the parsed values will
82  * be written
83  * @param buf input data buffer
84  * @param size size in bytes of the input data buffer
85  *
86  * @return >= 0 in case of success, a negative AVERROR code in case of failure
87  */
89 
90 /**
91  * Writes AV1 extradata (Sequence Header and Metadata OBUs) to the provided
92  * AVIOContext.
93  *
94  * @param pb pointer to the AVIOContext where the av1C box shall be written
95  * @param buf input data buffer
96  * @param size size in bytes of the input data buffer
97  *
98  * @return >= 0 in case of success, a negative AVERROR code in case of failure
99  */
100 int ff_isom_write_av1c(AVIOContext *pb, const uint8_t *buf, int size);
101 
102 #endif /* AVFORMAT_AV1_H */
Bytestream IO Context.
Definition: avio.h:161
Buffered I/O operations.
int ff_isom_write_av1c(AVIOContext *pb, const uint8_t *buf, int size)
Writes AV1 extradata (Sequence Header and Metadata OBUs) to the provided AVIOContext.
Definition: av1.c:364
uint8_t transfer_characteristics
Definition: av1.h:39
uint8_t chroma_sample_position
Definition: av1.h:36
uint8_t monochrome
Definition: av1.h:33
uint8_t chroma_subsampling_x
Definition: av1.h:34
uint8_t
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
int ff_av1_filter_obus(AVIOContext *pb, const uint8_t *buf, int size)
Filter out AV1 OBUs not meant to be present in ISOBMFF sample data and write the resulting bitstream ...
Definition: av1.c:81
ptrdiff_t size
Definition: opengl_enc.c:100
uint8_t color_range
Definition: av1.h:41
uint8_t color_description_present_flag
Definition: av1.h:37
int ff_av1_parse_seq_header(AV1SequenceParameters *seq, const uint8_t *buf, int size)
Parses a Sequence Header from the the provided buffer.
Definition: av1.c:334
uint8_t color_primaries
Definition: av1.h:38
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31))))#define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac){}void ff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map){AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);return NULL;}return ac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;}int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){int use_generic=1;int len=in->nb_samples;int p;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
uint8_t chroma_subsampling_y
Definition: av1.h:35
uint8_t level
Definition: av1.h:30
uint8_t tier
Definition: av1.h:31
FILE * out
Definition: movenc.c:54
uint8_t matrix_coefficients
Definition: av1.h:40
uint8_t bitdepth
Definition: av1.h:32
int ff_av1_filter_obus_buf(const uint8_t *in, uint8_t **out, int *size, int *offset)
Filter out AV1 OBUs not meant to be present in ISOBMFF sample data and return the result in a data bu...
Definition: av1.c:86
uint8_t profile
Definition: av1.h:29