diff options
Diffstat (limited to 'libavcodec/aac.h')
| -rw-r--r-- | libavcodec/aac.h | 78 |
1 files changed, 76 insertions, 2 deletions
diff --git a/libavcodec/aac.h b/libavcodec/aac.h index 164362f..ebf2218 100644 --- a/libavcodec/aac.h +++ b/libavcodec/aac.h @@ -42,8 +42,49 @@ 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 IVQUANT_SIZE 1024 +enum AudioObjectType { + AOT_NULL, + // Support? Name + AOT_AAC_MAIN, ///< Y Main + AOT_AAC_LC, ///< Y Low Complexity + AOT_AAC_SSR, ///< N (code in SoC repo) Scalable Sample Rate + AOT_AAC_LTP, ///< N (code in SoC repo) Long Term Prediction + AOT_SBR, ///< N (in progress) Spectral Band Replication + AOT_AAC_SCALABLE, ///< N Scalable + AOT_TWINVQ, ///< N Twin Vector Quantizer + AOT_CELP, ///< N Code Excited Linear Prediction + AOT_HVXC, ///< N Harmonic Vector eXcitation Coding + AOT_TTSI = 12, ///< N Text-To-Speech Interface + AOT_MAINSYNTH, ///< N Main Synthesis + AOT_WAVESYNTH, ///< N Wavetable Synthesis + AOT_MIDI, ///< N General MIDI + AOT_SAFX, ///< N Algorithmic Synthesis and Audio Effects + AOT_ER_AAC_LC, ///< N Error Resilient Low Complexity + AOT_ER_AAC_LTP = 19, ///< N Error Resilient Long Term Prediction + AOT_ER_AAC_SCALABLE, ///< N Error Resilient Scalable + AOT_ER_TWINVQ, ///< N Error Resilient Twin Vector Quantizer + AOT_ER_BSAC, ///< N Error Resilient Bit-Sliced Arithmetic Coding + AOT_ER_AAC_LD, ///< N Error Resilient Low Delay + AOT_ER_CELP, ///< N Error Resilient Code Excited Linear Prediction + AOT_ER_HVXC, ///< N Error Resilient Harmonic Vector eXcitation Coding + AOT_ER_HILN, ///< N Error Resilient Harmonic and Individual Lines plus Noise + AOT_ER_PARAM, ///< N Error Resilient Parametric + AOT_SSC, ///< N SinuSoidal Coding +}; + +enum ExtensionPayloadID { + EXT_FILL, + EXT_FILL_DATA, + EXT_DATA_ELEMENT, + EXT_DYNAMIC_RANGE = 0xb, + EXT_SBR_DATA = 0xd, + EXT_SBR_DATA_CRC = 0xe, +}; + enum WindowSequence { ONLY_LONG_SEQUENCE, LONG_START_SEQUENCE, @@ -51,7 +92,18 @@ enum WindowSequence { LONG_STOP_SEQUENCE, }; -enum ChannelType { +enum BandType { + ZERO_BT = 0, ///< Scalefactors and spectral data are all zero. + FIRST_PAIR_BT = 5, ///< This and later band types encode two values (rather than four) with one code word. + ESC_BT = 11, ///< Spectral data are coded with an escape sequence. + NOISE_BT = 13, ///< Spectral data are scaled white noise not coded in the bitstream. + INTENSITY_BT2 = 14, ///< Scalefactor data are intensity stereo positions. + INTENSITY_BT = 15, ///< Scalefactor data are intensity stereo positions. +}; + +#define IS_CODEBOOK_UNSIGNED(x) ((x - 1) & 10) + +enum ChannelPosition { AAC_CHANNEL_FRONT = 1, AAC_CHANNEL_SIDE = 2, AAC_CHANNEL_BACK = 3, @@ -59,12 +111,33 @@ enum ChannelType { AAC_CHANNEL_CC = 5, }; +typedef struct { + int num_pulse; + int start; + int offset[4]; + int amp[4]; +} Pulse; + +/** + * coupling parameters + */ +typedef struct { + /** * main AAC context */ typedef struct { AVCodecContext * avccontext; + MPEG4AudioConfig m4ac; + + int is_saved; ///< Set if elements have stored overlap from previous frame. + DynamicRangeControl che_drc; + + enum ChannelPosition che_pos[4][MAX_ELEM_ID]; /**< channel element channel mapping with the + * first index as the first 4 raw data block types + */ + /** * @defgroup tables Computed / set up during initialization. * @{ @@ -75,9 +148,10 @@ typedef struct { /** @} */ /** - * @defgroup output Members used for output interleaving and down-mixing. + * @defgroup output Members used for output interleaving. * @{ */ + 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 |
