diff options
Diffstat (limited to 'libavcodec/aac.h')
| -rw-r--r-- | libavcodec/aac.h | 48 |
1 files changed, 39 insertions, 9 deletions
diff --git a/libavcodec/aac.h b/libavcodec/aac.h index fed6bf4214..23ec085d8e 100644 --- a/libavcodec/aac.h +++ b/libavcodec/aac.h @@ -3,20 +3,20 @@ * 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 Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -81,7 +81,7 @@ enum BandType { INTENSITY_BT = 15, ///< Scalefactor data are intensity stereo positions. }; -#define IS_CODEBOOK_UNSIGNED(x) ((x - 1) & 10) +#define IS_CODEBOOK_UNSIGNED(x) (((x) - 1) & 10) enum ChannelPosition { AAC_CHANNEL_OFF = 0, @@ -141,6 +141,10 @@ typedef struct PredictorState { #define SCALE_MAX_DIFF 60 ///< maximum scalefactor difference allowed by standard #define SCALE_DIFF_ZERO 60 ///< codebook index corresponding to zero scalefactor indices difference +#define NOISE_PRE 256 ///< preamble for NOISE_BT, put in bitstream with the first noise band +#define NOISE_PRE_BITS 9 ///< length of preamble +#define NOISE_OFFSET 90 ///< subtracted from global gain, used as offset for the preamble + /** * Long Term Prediction */ @@ -233,7 +237,8 @@ typedef struct SingleChannelElement { 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, pcoeffs)[1024]; ///< coefficients for IMDCT, pristine + DECLARE_ALIGNED(32, float, coeffs)[1024]; ///< coefficients for IMDCT, maybe processed 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 @@ -245,6 +250,7 @@ typedef struct SingleChannelElement { * channel element - generic struct for SCE/CPE/CCE/LFE */ typedef struct ChannelElement { + int present; // 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) @@ -259,7 +265,8 @@ typedef struct ChannelElement { /** * main AAC context */ -typedef struct AACContext { +struct AACContext { + AVClass *class; AVCodecContext *avctx; AVFrame *frame; @@ -273,6 +280,7 @@ typedef struct AACContext { ChannelElement *che[4][MAX_ELEM_ID]; ChannelElement *tag_che_map[4][MAX_ELEM_ID]; int tags_mapped; + int warned_remapping_once; /** @} */ /** @@ -292,7 +300,7 @@ typedef struct AACContext { FFTContext mdct_ld; FFTContext mdct_ltp; IMDCT15Context *mdct480; - AVFloatDSPContext fdsp; + AVFloatDSPContext *fdsp; int random_state; /** @} */ @@ -303,9 +311,31 @@ typedef struct AACContext { SingleChannelElement *output_element[MAX_CHANNELS]; ///< Points to each SingleChannelElement /** @} */ + + /** + * @name Japanese DTV specific extension + * @{ + */ + int force_dmono_mode;///< 0->not dmono, 1->use first channel, 2->use second channel + int dmono_mode; ///< 0->not dmono, 1->use first channel, 2->use second channel + /** @} */ + DECLARE_ALIGNED(32, float, temp)[128]; OutputConfiguration oc[2]; -} AACContext; + int warned_num_aac_frames; + + /* aacdec functions pointers */ + void (*imdct_and_windowing)(AACContext *ac, SingleChannelElement *sce); + void (*apply_ltp)(AACContext *ac, SingleChannelElement *sce); + void (*apply_tns)(float coef[1024], TemporalNoiseShaping *tns, + IndividualChannelStream *ics, int decode); + void (*windowing_and_mdct_ltp)(AACContext *ac, float *out, + float *in, IndividualChannelStream *ics); + void (*update_ltp)(AACContext *ac, SingleChannelElement *sce); + +}; + +void ff_aacdec_init_mips(AACContext *c); #endif /* AVCODEC_AAC_H */ |