* Copyright (c) 2005-2006 Oded Shimon ( ods15 ods15 dyndns org )
* Copyright (c) 2006-2007 Maxim Gavrilov ( maxim.gavrilov gmail com )
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavcodec/aac.h
+ * @file
* AAC definitions and structures
* @author Oded Shimon ( ods15 ods15 dyndns org )
* @author Maxim Gavrilov ( maxim.gavrilov gmail com )
#ifndef AVCODEC_AAC_H
#define AVCODEC_AAC_H
+#include "libavutil/float_dsp.h"
#include "avcodec.h"
-#include "dsputil.h"
+#include "imdct15.h"
+#include "fft.h"
#include "mpeg4audio.h"
+#include "sbr.h"
#include <stdint.h>
-#define AAC_INIT_VLC_STATIC(num, size) \
- INIT_VLC_STATIC(&vlc_spectral[num], 6, ff_aac_spectral_sizes[num], \
- ff_aac_spectral_bits[num], sizeof( ff_aac_spectral_bits[num][0]), sizeof( ff_aac_spectral_bits[num][0]), \
- ff_aac_spectral_codes[num], sizeof(ff_aac_spectral_codes[num][0]), sizeof(ff_aac_spectral_codes[num][0]), \
- size);
-
#define MAX_CHANNELS 64
#define MAX_ELEM_ID 16
#define TNS_MAX_ORDER 20
+#define MAX_LTP_LONG_SFB 40
enum RawDataBlockType {
TYPE_SCE,
#define IS_CODEBOOK_UNSIGNED(x) ((x - 1) & 10)
enum ChannelPosition {
+ AAC_CHANNEL_OFF = 0,
AAC_CHANNEL_FRONT = 1,
AAC_CHANNEL_SIDE = 2,
AAC_CHANNEL_BACK = 3,
* Output configuration status
*/
enum OCStatus {
- OC_NONE, //< Output unconfigured
- OC_TRIAL_PCE, //< Output configuration under trial specified by an inband PCE
- OC_TRIAL_FRAME, //< Output configuration under trial specified by a frame header
- OC_LOCKED, //< Output configuration locked in place
+ OC_NONE, ///< Output unconfigured
+ OC_TRIAL_PCE, ///< Output configuration under trial specified by an inband PCE
+ OC_TRIAL_FRAME, ///< Output configuration under trial specified by a frame header
+ OC_GLOBAL_HDR, ///< Output configuration set in a global header but not yet locked
+ OC_LOCKED, ///< Output configuration locked in place
};
+typedef struct OutputConfiguration {
+ MPEG4AudioConfig m4ac;
+ uint8_t layout_map[MAX_ELEM_ID*4][3];
+ int layout_map_tags;
+ int channels;
+ uint64_t channel_layout;
+ enum OCStatus status;
+} OutputConfiguration;
+
/**
* Predictor State
*/
-typedef struct {
+typedef struct PredictorState {
float cor0;
float cor1;
float var0;
#define SCALE_MAX_DIFF 60 ///< maximum scalefactor difference allowed by standard
#define SCALE_DIFF_ZERO 60 ///< codebook index corresponding to zero scalefactor indices difference
+/**
+ * Long Term Prediction
+ */
+typedef struct LongTermPrediction {
+ int8_t present;
+ int16_t lag;
+ float coef;
+ int8_t used[MAX_LTP_LONG_SFB];
+} LongTermPrediction;
+
/**
* Individual Channel Stream
*/
-typedef struct {
+typedef struct IndividualChannelStream {
uint8_t max_sfb; ///< number of scalefactor bands per group
enum WindowSequence window_sequence[2];
- uint8_t use_kb_window[2]; ///< If set, use Kaiser-Bessel window, otherwise use a sinus window.
+ uint8_t use_kb_window[2]; ///< If set, use Kaiser-Bessel window, otherwise use a sine window.
int num_window_groups;
uint8_t group_len[8];
+ LongTermPrediction ltp;
const uint16_t *swb_offset; ///< table of offsets to the lowest spectral coefficient of a scalefactor band, sfb, for a particular window
const uint8_t *swb_sizes; ///< table of scalefactor band sizes for a particular window
int num_swb; ///< number of scalefactor window bands
/**
* Temporal Noise Shaping
*/
-typedef struct {
+typedef struct TemporalNoiseShaping {
int present;
int n_filt[8];
int length[8][4];
/**
* Dynamic Range Control - decoded from the bitstream but not processed further.
*/
-typedef struct {
+typedef struct DynamicRangeControl {
int pce_instance_tag; ///< Indicates with which program the DRC info is associated.
int dyn_rng_sgn[17]; ///< DRC sign information; 0 - positive, 1 - negative
int dyn_rng_ctl[17]; ///< DRC magnitude information
*/
} DynamicRangeControl;
-typedef struct {
+typedef struct Pulse {
int num_pulse;
int start;
int pos[4];
/**
* coupling parameters
*/
-typedef struct {
+typedef struct ChannelCoupling {
enum CouplingPoint coupling_point; ///< The point during decoding at which coupling is applied.
int num_coupled; ///< number of target elements
enum RawDataBlockType type[8]; ///< Type of channel element to be coupled - SCE or CPE.
/**
* Single Channel Element - used for both SCE and LFE elements.
*/
-typedef struct {
+typedef struct SingleChannelElement {
IndividualChannelStream ics;
TemporalNoiseShaping tns;
Pulse pulse;
- enum BandType band_type[128]; ///< band types
- int band_type_run_end[120]; ///< band type run end points
- float sf[120]; ///< scalefactors
- int sf_idx[128]; ///< scalefactor indices (used by encoder)
- uint8_t zeroes[128]; ///< band is not coded (used by encoder)
- DECLARE_ALIGNED_16(float, coeffs[1024]); ///< coefficients for IMDCT
- DECLARE_ALIGNED_16(float, saved[1024]); ///< overlap
- DECLARE_ALIGNED_16(float, ret[1024]); ///< PCM output
+ enum BandType band_type[128]; ///< band types
+ int band_type_run_end[120]; ///< band type run end points
+ float sf[120]; ///< scalefactors
+ int sf_idx[128]; ///< scalefactor indices (used by encoder)
+ uint8_t zeroes[128]; ///< band is not coded (used by encoder)
+ DECLARE_ALIGNED(32, float, coeffs)[1024]; ///< coefficients for IMDCT
+ DECLARE_ALIGNED(32, float, saved)[1536]; ///< overlap
+ DECLARE_ALIGNED(32, float, ret_buf)[2048]; ///< PCM output buffer
+ DECLARE_ALIGNED(16, float, ltp_state)[3072]; ///< time signal for LTP
PredictorState predictor_state[MAX_PREDICTORS];
+ float *ret; ///< PCM output
} SingleChannelElement;
/**
* channel element - generic struct for SCE/CPE/CCE/LFE
*/
-typedef struct {
+typedef struct ChannelElement {
// CPE specific
int common_window; ///< Set if channels share a common 'IndividualChannelStream' in bitstream.
int ms_mode; ///< Signals mid/side stereo flags coding mode (used by encoder)
SingleChannelElement ch[2];
// CCE specific
ChannelCoupling coup;
+ SpectralBandReplication sbr;
} ChannelElement;
/**
* main AAC context
*/
-typedef struct {
- AVCodecContext * avccontext;
-
- MPEG4AudioConfig m4ac;
+typedef struct AACContext {
+ AVCodecContext *avctx;
+ AVFrame *frame;
int is_saved; ///< Set if elements have stored overlap from previous frame.
DynamicRangeControl che_drc;
/**
- * @defgroup elements Channel element related data.
+ * @name Channel element related data
* @{
*/
- enum ChannelPosition che_pos[4][MAX_ELEM_ID]; /**< channel element channel mapping with the
- * first index as the first 4 raw data block types
- */
- ChannelElement * che[4][MAX_ELEM_ID];
- ChannelElement * tag_che_map[4][MAX_ELEM_ID];
+ ChannelElement *che[4][MAX_ELEM_ID];
+ ChannelElement *tag_che_map[4][MAX_ELEM_ID];
int tags_mapped;
/** @} */
/**
- * @defgroup temporary aligned temporary buffers (We do not want to have these on the stack.)
+ * @name temporary aligned temporary buffers
+ * (We do not want to have these on the stack.)
* @{
*/
- DECLARE_ALIGNED_16(float, buf_mdct[1024]);
+ DECLARE_ALIGNED(32, float, buf_mdct)[1024];
/** @} */
/**
- * @defgroup tables Computed / set up during initialization.
+ * @name Computed / set up during initialization
* @{
*/
FFTContext mdct;
FFTContext mdct_small;
- DSPContext dsp;
+ FFTContext mdct_ld;
+ FFTContext mdct_ltp;
+ IMDCT15Context *mdct480;
+ AVFloatDSPContext fdsp;
int random_state;
/** @} */
/**
- * @defgroup output Members used for output interleaving.
+ * @name Members used for output
* @{
*/
- float *output_data[MAX_CHANNELS]; ///< Points to each element's 'ret' buffer (PCM output).
- float add_bias; ///< offset for dsp.float_to_int16
- float sf_scale; ///< Pre-scale for correct IMDCT and dsp.float_to_int16.
- int sf_offset; ///< offset into pow2sf_tab as appropriate for dsp.float_to_int16
+ SingleChannelElement *output_element[MAX_CHANNELS]; ///< Points to each SingleChannelElement
/** @} */
- DECLARE_ALIGNED(16, float, temp[128]);
+ DECLARE_ALIGNED(32, float, temp)[128];
- enum OCStatus output_configured;
+ OutputConfiguration oc[2];
} AACContext;
#endif /* AVCODEC_AAC_H */
projects / ffmpeg / blobdiff