FFmpeg
Data Structures | Macros | Functions | Variables
aacdec.c File Reference
#include "config_components.h"
#include <limits.h>
#include <stddef.h>
#include "aacdec.h"
#include "aacdec_tab.h"
#include "aacdec_usac.h"
#include "libavcodec/aac.h"
#include "libavcodec/aac_defines.h"
#include "libavcodec/aacsbr.h"
#include "libavcodec/aactab.h"
#include "libavcodec/adts_header.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/internal.h"
#include "libavcodec/codec_internal.h"
#include "libavcodec/decode.h"
#include "libavcodec/profiles.h"
#include "libavutil/attributes.h"
#include "libavutil/error.h"
#include "libavutil/log.h"
#include "libavutil/macros.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/tx.h"
#include "libavutil/version.h"

Go to the source code of this file.

Data Structures

struct  elem_to_channel
 

Macros

#define USE_FIXED   1
 
#define overread_err   "Input buffer exhausted before END element found\n"
 
#define MDCT_INIT(s, fn, len, sval)
 
#define AACDEC_FLAGS   AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM
 
#define OFF(field)   offsetof(AACDecContext, field)
 

Functions

static int count_channels (uint8_t(*layout)[3], int tags)
 
static av_cold int che_configure (AACDecContext *ac, enum ChannelPosition che_pos, int type, int id, int *channels)
 Check for the channel element in the current channel position configuration. More...
 
static int frame_configure_elements (AVCodecContext *avctx)
 
static int assign_pair (struct elem_to_channel e2c_vec[MAX_ELEM_ID], uint8_t(*layout_map)[3], int offset, uint64_t left, uint64_t right, int pos, uint64_t *layout)
 
static int count_paired_channels (uint8_t(*layout_map)[3], int tags, int pos, int current)
 
static int assign_channels (struct elem_to_channel e2c_vec[MAX_ELEM_ID], uint8_t(*layout_map)[3], uint64_t *layout, int tags, int layer, int pos, int *current)
 
static uint64_t sniff_channel_order (uint8_t(*layout_map)[3], int tags)
 
static int push_output_configuration (AACDecContext *ac)
 Save current output configuration if and only if it has been locked. More...
 
static void pop_output_configuration (AACDecContext *ac)
 Restore the previous output configuration if and only if the current configuration is unlocked. More...
 
int ff_aac_output_configure (AACDecContext *ac, uint8_t layout_map[MAX_ELEM_ID *4][3], int tags, enum OCStatus oc_type, int get_new_frame)
 Configure output channel order based on the current program configuration element. More...
 
static av_cold void flush (AVCodecContext *avctx)
 
int ff_aac_set_default_channel_config (AACDecContext *ac, AVCodecContext *avctx, uint8_t(*layout_map)[3], int *tags, int channel_config)
 Set up channel positions based on a default channel configuration as specified in table 1.17. More...
 
ChannelElementff_aac_get_che (AACDecContext *ac, int type, int elem_id)
 
static void decode_channel_map (uint8_t layout_map[][3], enum ChannelPosition type, GetBitContext *gb, int n)
 Decode an array of 4 bit element IDs, optionally interleaved with a stereo/mono switching bit. More...
 
static void relative_align_get_bits (GetBitContext *gb, int reference_position)
 
static int decode_pce (AVCodecContext *avctx, MPEG4AudioConfig *m4ac, uint8_t(*layout_map)[3], GetBitContext *gb, int byte_align_ref)
 Decode program configuration element; reference: table 4.2. More...
 
static int decode_ga_specific_config (AACDecContext *ac, AVCodecContext *avctx, GetBitContext *gb, int get_bit_alignment, MPEG4AudioConfig *m4ac, int channel_config)
 Decode GA "General Audio" specific configuration; reference: table 4.1. More...
 
static int decode_eld_specific_config (AACDecContext *ac, AVCodecContext *avctx, GetBitContext *gb, MPEG4AudioConfig *m4ac, int channel_config)
 
static int decode_audio_specific_config_gb (AACDecContext *ac, AVCodecContext *avctx, OutputConfiguration *oc, GetBitContext *gb, int get_bit_alignment, int sync_extension)
 Decode audio specific configuration; reference: table 1.13. More...
 
static int decode_audio_specific_config (AACDecContext *ac, AVCodecContext *avctx, OutputConfiguration *oc, const uint8_t *data, int64_t bit_size, int sync_extension)
 
static int sample_rate_idx (int rate)
 
static av_cold int decode_close (AVCodecContext *avctx)
 
static av_cold int init_dsp (AVCodecContext *avctx)
 
av_cold int ff_aac_decode_init (AVCodecContext *avctx)
 
static int skip_data_stream_element (AACDecContext *ac, GetBitContext *gb)
 Skip data_stream_element; reference: table 4.10. More...
 
static int decode_prediction (AACDecContext *ac, IndividualChannelStream *ics, GetBitContext *gb)
 
static void decode_ltp (AACDecContext *ac, LongTermPrediction *ltp, GetBitContext *gb, uint8_t max_sfb)
 Decode Long Term Prediction data; reference: table 4.xx. More...
 
static int decode_ics_info (AACDecContext *ac, IndividualChannelStream *ics, GetBitContext *gb)
 Decode Individual Channel Stream info; reference: table 4.6. More...
 
static int decode_band_types (AACDecContext *ac, SingleChannelElement *sce, GetBitContext *gb)
 Decode band types (section_data payload); reference: table 4.46. More...
 
static int decode_scalefactors (AACDecContext *ac, SingleChannelElement *sce, GetBitContext *gb, unsigned int global_gain)
 Decode scalefactors; reference: table 4.47. More...
 
static int decode_pulses (Pulse *pulse, GetBitContext *gb, const uint16_t *swb_offset, int num_swb)
 Decode pulse data; reference: table 4.7. More...
 
int ff_aac_decode_tns (AACDecContext *ac, TemporalNoiseShaping *tns, GetBitContext *gb, const IndividualChannelStream *ics)
 Decode Temporal Noise Shaping data; reference: table 4.48. More...
 
static void decode_mid_side_stereo (ChannelElement *cpe, GetBitContext *gb, int ms_present)
 Decode Mid/Side data; reference: table 4.54. More...
 
static void decode_gain_control (SingleChannelElement *sce, GetBitContext *gb)
 
int ff_aac_decode_ics (AACDecContext *ac, SingleChannelElement *sce, GetBitContext *gb, int common_window, int scale_flag)
 Decode an individual_channel_stream payload; reference: table 4.44. More...
 
static int decode_cpe (AACDecContext *ac, GetBitContext *gb, ChannelElement *cpe)
 Decode a channel_pair_element; reference: table 4.4. More...
 
static int decode_drc_channel_exclusions (DynamicRangeControl *che_drc, GetBitContext *gb)
 Parse whether channels are to be excluded from Dynamic Range Compression; reference: table 4.53. More...
 
static int decode_dynamic_range (DynamicRangeControl *che_drc, GetBitContext *gb)
 Decode dynamic range information; reference: table 4.52. More...
 
static int decode_fill (AACDecContext *ac, GetBitContext *gb, int len)
 
static int decode_extension_payload (AACDecContext *ac, GetBitContext *gb, int cnt, ChannelElement *che, enum RawDataBlockType elem_type)
 Decode extension data (incomplete); reference: table 4.51. More...
 
static void apply_channel_coupling (AACDecContext *ac, ChannelElement *cc, enum RawDataBlockType type, int elem_id, enum CouplingPoint coupling_point, void(*apply_coupling_method)(AACDecContext *ac, SingleChannelElement *target, ChannelElement *cce, int index))
 channel coupling transformation interface More...
 
static void spectral_to_sample (AACDecContext *ac, int samples)
 Convert spectral data to samples, applying all supported tools as appropriate. More...
 
static int parse_adts_frame_header (AACDecContext *ac, GetBitContext *gb)
 
static int aac_decode_er_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, GetBitContext *gb)
 
static int decode_frame_ga (AVCodecContext *avctx, AACDecContext *ac, GetBitContext *gb, int *got_frame_ptr)
 
static int aac_decode_frame_int (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, GetBitContext *gb, const AVPacket *avpkt)
 
static int aac_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)
 

Variables

static const AVOption options []
 
static const AVClass decoder_class
 

Macro Definition Documentation

◆ USE_FIXED

#define USE_FIXED   1

Definition at line 34 of file aacdec.c.

◆ overread_err

#define overread_err   "Input buffer exhausted before END element found\n"

Definition at line 115 of file aacdec.c.

◆ MDCT_INIT

#define MDCT_INIT (   s,
  fn,
  len,
  sval 
)
Value:
scale_fixed = (sval) * 128.0f; \
scale_float = (sval) / 32768.0f; \
ret = av_tx_init(&s, &fn, tx_type, 1, len, scalep, 0); \
if (ret < 0) \
return ret

◆ AACDEC_FLAGS

Definition at line 2514 of file aacdec.c.

◆ OFF

#define OFF (   field)    offsetof(AACDecContext, field)

Definition at line 2515 of file aacdec.c.

Function Documentation

◆ count_channels()

static int count_channels ( uint8_t(*)  layout[3],
int  tags 
)
static

Definition at line 117 of file aacdec.c.

Referenced by decode_ga_specific_config().

◆ che_configure()

static av_cold int che_configure ( AACDecContext ac,
enum ChannelPosition  che_pos,
int  type,
int  id,
int channels 
)
static

Check for the channel element in the current channel position configuration.

If it exists, make sure the appropriate element is allocated and map the channel order to match the internal FFmpeg channel layout.

Parameters
che_poscurrent channel position configuration
typechannel element type
idchannel element id
channelscount of the number of channels in the configuration
Returns
Returns error status. 0 - OK, !0 - error

Definition at line 141 of file aacdec.c.

Referenced by ff_aac_output_configure().

◆ frame_configure_elements()

static int frame_configure_elements ( AVCodecContext avctx)
static

Definition at line 173 of file aacdec.c.

Referenced by aac_decode_er_frame(), aac_decode_frame_int(), and ff_aac_output_configure().

◆ assign_pair()

static int assign_pair ( struct elem_to_channel  e2c_vec[MAX_ELEM_ID],
uint8_t(*)  layout_map[3],
int  offset,
uint64_t  left,
uint64_t  right,
int  pos,
uint64_t *  layout 
)
static

Definition at line 214 of file aacdec.c.

Referenced by assign_channels().

◆ count_paired_channels()

static int count_paired_channels ( uint8_t(*)  layout_map[3],
int  tags,
int  pos,
int  current 
)
static

Definition at line 252 of file aacdec.c.

Referenced by assign_channels().

◆ assign_channels()

static int assign_channels ( struct elem_to_channel  e2c_vec[MAX_ELEM_ID],
uint8_t(*)  layout_map[3],
uint64_t *  layout,
int  tags,
int  layer,
int  pos,
int current 
)
static

Definition at line 284 of file aacdec.c.

Referenced by sniff_channel_order().

◆ sniff_channel_order()

static uint64_t sniff_channel_order ( uint8_t(*)  layout_map[3],
int  tags 
)
static

Definition at line 362 of file aacdec.c.

Referenced by ff_aac_output_configure().

◆ push_output_configuration()

static int push_output_configuration ( AACDecContext ac)
static

Save current output configuration if and only if it has been locked.

Definition at line 426 of file aacdec.c.

Referenced by decode_frame_ga(), ff_aac_get_che(), latm_decode_frame(), and parse_adts_frame_header().

◆ pop_output_configuration()

static void pop_output_configuration ( AACDecContext ac)
static

Restore the previous output configuration if and only if the current configuration is unlocked.

Definition at line 442 of file aacdec.c.

Referenced by aac_decode_frame_int(), decode_frame_ga(), and latm_decode_frame().

◆ ff_aac_output_configure()

int ff_aac_output_configure ( AACDecContext ac,
uint8_t  layout_map[MAX_ELEM_ID *4][3],
int  tags,
enum OCStatus  oc_type,
int  get_new_frame 
)

Configure output channel order based on the current program configuration element.

Returns
Returns error status. 0 - OK, !0 - error

Definition at line 458 of file aacdec.c.

Referenced by decode_eld_specific_config(), decode_extension_payload(), decode_frame_ga(), decode_ga_specific_config(), ff_aac_decode_init(), ff_aac_get_che(), ff_aac_usac_config_decode(), ff_aac_usac_decode_frame(), parse_adts_frame_header(), and pop_output_configuration().

◆ flush()

static av_cold void flush ( AVCodecContext avctx)
static

Definition at line 524 of file aacdec.c.

◆ ff_aac_set_default_channel_config()

int ff_aac_set_default_channel_config ( AACDecContext ac,
AVCodecContext avctx,
uint8_t(*)  layout_map[3],
int tags,
int  channel_config 
)

Set up channel positions based on a default channel configuration as specified in table 1.17.

Returns
Returns error status. 0 - OK, !0 - error

Definition at line 549 of file aacdec.c.

Referenced by decode_eld_specific_config(), decode_ga_specific_config(), ff_aac_decode_init(), ff_aac_get_che(), ff_aac_usac_config_decode(), and parse_adts_frame_header().

◆ ff_aac_get_che()

ChannelElement* ff_aac_get_che ( AACDecContext ac,
int  type,
int  elem_id 
)

◆ decode_channel_map()

static void decode_channel_map ( uint8_t  layout_map[][3],
enum ChannelPosition  type,
GetBitContext gb,
int  n 
)
static

Decode an array of 4 bit element IDs, optionally interleaved with a stereo/mono switching bit.

Parameters
typespeaker type/position for these channels

Definition at line 735 of file aacdec.c.

Referenced by decode_pce().

◆ relative_align_get_bits()

static void relative_align_get_bits ( GetBitContext gb,
int  reference_position 
)
inlinestatic

Definition at line 765 of file aacdec.c.

Referenced by decode_pce().

◆ decode_pce()

static int decode_pce ( AVCodecContext avctx,
MPEG4AudioConfig m4ac,
uint8_t(*)  layout_map[3],
GetBitContext gb,
int  byte_align_ref 
)
static

Decode program configuration element; reference: table 4.2.

Returns
Returns error status. 0 - OK, !0 - error

Definition at line 777 of file aacdec.c.

Referenced by decode_frame_ga(), and decode_ga_specific_config().

◆ decode_ga_specific_config()

static int decode_ga_specific_config ( AACDecContext ac,
AVCodecContext avctx,
GetBitContext gb,
int  get_bit_alignment,
MPEG4AudioConfig m4ac,
int  channel_config 
)
static

Decode GA "General Audio" specific configuration; reference: table 4.1.

Parameters
acpointer to AACDecContext, may be null
avctxpointer to AVCCodecContext, used for logging
Returns
Returns error status. 0 - OK, !0 - error

Definition at line 847 of file aacdec.c.

Referenced by decode_audio_specific_config_gb().

◆ decode_eld_specific_config()

static int decode_eld_specific_config ( AACDecContext ac,
AVCodecContext avctx,
GetBitContext gb,
MPEG4AudioConfig m4ac,
int  channel_config 
)
static

Definition at line 928 of file aacdec.c.

Referenced by decode_audio_specific_config_gb().

◆ decode_audio_specific_config_gb()

static int decode_audio_specific_config_gb ( AACDecContext ac,
AVCodecContext avctx,
OutputConfiguration oc,
GetBitContext gb,
int  get_bit_alignment,
int  sync_extension 
)
static

Decode audio specific configuration; reference: table 1.13.

Parameters
acpointer to AACDecContext, may be null
avctxpointer to AVCCodecContext, used for logging
m4acpointer to MPEG4AudioConfig, used for parsing
gbbuffer holding an audio specific config
get_bit_alignmentrelative alignment for byte align operations
sync_extensionlook for an appended sync extension
Returns
Returns error status or number of consumed bits. <0 - error

Definition at line 997 of file aacdec.c.

Referenced by decode_audio_specific_config(), and latm_decode_audio_specific_config().

◆ decode_audio_specific_config()

static int decode_audio_specific_config ( AACDecContext ac,
AVCodecContext avctx,
OutputConfiguration oc,
const uint8_t *  data,
int64_t  bit_size,
int  sync_extension 
)
static

Definition at line 1072 of file aacdec.c.

Referenced by aac_decode_frame(), ff_aac_decode_init(), and latm_decode_frame().

◆ sample_rate_idx()

static int sample_rate_idx ( int  rate)
static

Definition at line 1098 of file aacdec.c.

Referenced by ff_aac_decode_init().

◆ decode_close()

static av_cold int decode_close ( AVCodecContext avctx)
static

Definition at line 1114 of file aacdec.c.

◆ init_dsp()

static av_cold int init_dsp ( AVCodecContext avctx)
static

Definition at line 1155 of file aacdec.c.

Referenced by ff_aac_decode_init().

◆ ff_aac_decode_init()

av_cold int ff_aac_decode_init ( AVCodecContext avctx)

Definition at line 1190 of file aacdec.c.

Referenced by ff_aac_decode_init_fixed(), and ff_aac_decode_init_float().

◆ skip_data_stream_element()

static int skip_data_stream_element ( AACDecContext ac,
GetBitContext gb 
)
static

Skip data_stream_element; reference: table 4.10.

Definition at line 1253 of file aacdec.c.

Referenced by decode_frame_ga().

◆ decode_prediction()

static int decode_prediction ( AACDecContext ac,
IndividualChannelStream ics,
GetBitContext gb 
)
static

Definition at line 1270 of file aacdec.c.

Referenced by decode_ics_info().

◆ decode_ltp()

static void decode_ltp ( AACDecContext ac,
LongTermPrediction ltp,
GetBitContext gb,
uint8_t  max_sfb 
)
static

Decode Long Term Prediction data; reference: table 4.xx.

Definition at line 1292 of file aacdec.c.

Referenced by decode_cpe(), and decode_ics_info().

◆ decode_ics_info()

static int decode_ics_info ( AACDecContext ac,
IndividualChannelStream ics,
GetBitContext gb 
)
static

Decode Individual Channel Stream info; reference: table 4.6.

Definition at line 1310 of file aacdec.c.

Referenced by decode_cpe(), and ff_aac_decode_ics().

◆ decode_band_types()

static int decode_band_types ( AACDecContext ac,
SingleChannelElement sce,
GetBitContext gb 
)
static

Decode band types (section_data payload); reference: table 4.46.

Parameters
band_typearray of the used band type
band_type_run_endarray of the last scalefactor band of a band type run
Returns
Returns error status. 0 - OK, !0 - error

Definition at line 1437 of file aacdec.c.

Referenced by ff_aac_decode_ics().

◆ decode_scalefactors()

static int decode_scalefactors ( AACDecContext ac,
SingleChannelElement sce,
GetBitContext gb,
unsigned int  global_gain 
)
static

Decode scalefactors; reference: table 4.47.

Parameters
global_gainfirst scalefactor value as scalefactors are differentially coded
band_typearray of the used band type
band_type_run_endarray of the last scalefactor band of a band type run
sfarray of scalefactors or intensity stereo positions
Returns
Returns error status. 0 - OK, !0 - error

Definition at line 1484 of file aacdec.c.

Referenced by ff_aac_decode_ics().

◆ decode_pulses()

static int decode_pulses ( Pulse pulse,
GetBitContext gb,
const uint16_t *  swb_offset,
int  num_swb 
)
static

Decode pulse data; reference: table 4.7.

Definition at line 1543 of file aacdec.c.

Referenced by ff_aac_decode_ics().

◆ ff_aac_decode_tns()

int ff_aac_decode_tns ( AACDecContext ac,
TemporalNoiseShaping tns,
GetBitContext gb,
const IndividualChannelStream ics 
)

Decode Temporal Noise Shaping data; reference: table 4.48.

Returns
Returns error status. 0 - OK, !0 - error

Definition at line 1570 of file aacdec.c.

Referenced by decode_usac_core_coder(), decode_usac_stereo_info(), and ff_aac_decode_ics().

◆ decode_mid_side_stereo()

static void decode_mid_side_stereo ( ChannelElement cpe,
GetBitContext gb,
int  ms_present 
)
static

Decode Mid/Side data; reference: table 4.54.

Parameters
ms_presentIndicates mid/side stereo presence. [0] mask is all 0s; [1] mask is decoded from bitstream; [2] mask is all 1s; [3] reserved for scalable AAC

Definition at line 1628 of file aacdec.c.

Referenced by decode_cpe().

◆ decode_gain_control()

static void decode_gain_control ( SingleChannelElement sce,
GetBitContext gb 
)
static

Definition at line 1642 of file aacdec.c.

Referenced by ff_aac_decode_ics().

◆ ff_aac_decode_ics()

int ff_aac_decode_ics ( AACDecContext ac,
SingleChannelElement sce,
GetBitContext gb,
int  common_window,
int  scale_flag 
)

Decode an individual_channel_stream payload; reference: table 4.44.

Parameters
common_windowChannels have independent [0], or shared [1], Individual Channel Stream information.
scale_flagscalable [1] or non-scalable [0] AAC (Unused until scalable AAC is implemented.)
Returns
Returns error status. 0 - OK, !0 - error

Definition at line 1677 of file aacdec.c.

Referenced by aac_decode_er_frame(), decode_cce(), decode_cpe(), and decode_frame_ga().

◆ decode_cpe()

static int decode_cpe ( AACDecContext ac,
GetBitContext gb,
ChannelElement cpe 
)
static

Decode a channel_pair_element; reference: table 4.4.

Returns
Returns error status. 0 - OK, !0 - error

Definition at line 1770 of file aacdec.c.

Referenced by aac_decode_er_frame(), and decode_frame_ga().

◆ decode_drc_channel_exclusions()

static int decode_drc_channel_exclusions ( DynamicRangeControl che_drc,
GetBitContext gb 
)
static

Parse whether channels are to be excluded from Dynamic Range Compression; reference: table 4.53.

Returns
Returns number of bytes consumed.

Definition at line 1816 of file aacdec.c.

Referenced by decode_dynamic_range().

◆ decode_dynamic_range()

static int decode_dynamic_range ( DynamicRangeControl che_drc,
GetBitContext gb 
)
static

Decode dynamic range information; reference: table 4.52.

Returns
Returns number of bytes consumed.

Definition at line 1835 of file aacdec.c.

Referenced by decode_extension_payload().

◆ decode_fill()

static int decode_fill ( AACDecContext ac,
GetBitContext gb,
int  len 
)
static

Definition at line 1882 of file aacdec.c.

Referenced by decode_extension_payload().

◆ decode_extension_payload()

static int decode_extension_payload ( AACDecContext ac,
GetBitContext gb,
int  cnt,
ChannelElement che,
enum RawDataBlockType  elem_type 
)
static

Decode extension data (incomplete); reference: table 4.51.

Parameters
cntlength of TYPE_FIL syntactic element in bytes
Returns
Returns number of bytes consumed

Definition at line 1915 of file aacdec.c.

Referenced by decode_frame_ga().

◆ apply_channel_coupling()

static void apply_channel_coupling ( AACDecContext ac,
ChannelElement cc,
enum RawDataBlockType  type,
int  elem_id,
enum CouplingPoint  coupling_point,
void(*)(AACDecContext *ac, SingleChannelElement *target, ChannelElement *cce, int index apply_coupling_method 
)
static

channel coupling transformation interface

Parameters
apply_coupling_methodpointer to (in)dependent coupling function

Definition at line 1986 of file aacdec.c.

Referenced by spectral_to_sample().

◆ spectral_to_sample()

static void spectral_to_sample ( AACDecContext ac,
int  samples 
)
static

Convert spectral data to samples, applying all supported tools as appropriate.

Definition at line 2019 of file aacdec.c.

Referenced by aac_decode_er_frame(), and decode_frame_ga().

◆ parse_adts_frame_header()

static int parse_adts_frame_header ( AACDecContext ac,
GetBitContext gb 
)
static

dual mono frames in Japanese DTV can have chan_config 0 WITHOUT specifying PCE. thus, set dual mono as default.

Definition at line 2084 of file aacdec.c.

Referenced by aac_decode_frame_int().

◆ aac_decode_er_frame()

static int aac_decode_er_frame ( AVCodecContext avctx,
AVFrame frame,
int got_frame_ptr,
GetBitContext gb 
)
static

Definition at line 2146 of file aacdec.c.

Referenced by aac_decode_frame(), and latm_decode_frame().

◆ decode_frame_ga()

static int decode_frame_ga ( AVCodecContext avctx,
AACDecContext ac,
GetBitContext gb,
int got_frame_ptr 
)
static

Definition at line 2218 of file aacdec.c.

Referenced by aac_decode_frame_int().

◆ aac_decode_frame_int()

static int aac_decode_frame_int ( AVCodecContext avctx,
AVFrame frame,
int got_frame_ptr,
GetBitContext gb,
const AVPacket avpkt 
)
static

Definition at line 2392 of file aacdec.c.

Referenced by aac_decode_frame(), and latm_decode_frame().

◆ aac_decode_frame()

static int aac_decode_frame ( AVCodecContext avctx,
AVFrame frame,
int got_frame_ptr,
AVPacket avpkt 
)
static

Definition at line 2447 of file aacdec.c.

Variable Documentation

◆ options

const AVOption options[]
static
Initial value:
= {
{"dual_mono_mode", "Select the channel to decode for dual mono",
OFF(force_dmono_mode), AV_OPT_TYPE_INT, {.i64=-1}, -1, 2,
AACDEC_FLAGS, .unit = "dual_mono_mode"},
{"auto", "autoselection", 0, AV_OPT_TYPE_CONST, {.i64=-1}, INT_MIN, INT_MAX, AACDEC_FLAGS, .unit = "dual_mono_mode"},
{"main", "Select Main/Left channel", 0, AV_OPT_TYPE_CONST, {.i64= 1}, INT_MIN, INT_MAX, AACDEC_FLAGS, .unit = "dual_mono_mode"},
{"sub" , "Select Sub/Right channel", 0, AV_OPT_TYPE_CONST, {.i64= 2}, INT_MIN, INT_MAX, AACDEC_FLAGS, .unit = "dual_mono_mode"},
{"both", "Select both channels", 0, AV_OPT_TYPE_CONST, {.i64= 0}, INT_MIN, INT_MAX, AACDEC_FLAGS, .unit = "dual_mono_mode"},
{ "channel_order", "Order in which the channels are to be exported",
OFF(output_channel_order), AV_OPT_TYPE_INT,
{ .i64 = CHANNEL_ORDER_DEFAULT }, 0, 1, AACDEC_FLAGS, .unit = "channel_order" },
{ "default", "normal libavcodec channel order", 0, AV_OPT_TYPE_CONST,
{ .i64 = CHANNEL_ORDER_DEFAULT }, .flags = AACDEC_FLAGS, .unit = "channel_order" },
{ "coded", "order in which the channels are coded in the bitstream",
0, AV_OPT_TYPE_CONST, { .i64 = CHANNEL_ORDER_CODED }, .flags = AACDEC_FLAGS, .unit = "channel_order" },
{NULL},
}

Definition at line 2516 of file aacdec.c.

◆ decoder_class

const AVClass decoder_class
static
Initial value:
= {
.class_name = "AAC decoder",
.item_name = av_default_item_name,
.option = options,
}

Definition at line 2540 of file aacdec.c.

av_tx_init
av_cold int av_tx_init(AVTXContext **ctx, av_tx_fn *tx, enum AVTXType type, int inv, int len, const void *scale, uint64_t flags)
Initialize a transform context with the given configuration (i)MDCTs with an odd length are currently...
Definition: tx.c:903
options
static const AVOption options[]
Definition: aacdec.c:2516
s
#define s(width, name)
Definition: cbs_vp9.c:198
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
NULL
#define NULL
Definition: coverity.c:32
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
f
f
Definition: af_crystalizer.c:121
fn
#define fn(a)
Definition: aap_template.c:37
CHANNEL_ORDER_CODED
@ CHANNEL_ORDER_CODED
Definition: aacdec.h:62
AACDEC_FLAGS
#define AACDEC_FLAGS
Definition: aacdec.c:2514
len
int len
Definition: vorbis_enc_data.h:426
ret
ret
Definition: filter_design.txt:187
CHANNEL_ORDER_DEFAULT
@ CHANNEL_ORDER_DEFAULT
Definition: aacdec.h:61
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:245
OFF
#define OFF(field)
Definition: aacdec.c:2515
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:254