diff options
| author | Tim Redfern <tim@eclectronics.org> | 2014-02-17 13:36:38 +0000 |
|---|---|---|
| committer | Tim Redfern <tim@eclectronics.org> | 2014-02-17 13:36:38 +0000 |
| commit | 22e28216336da876e1fd17f380ce42eaf1446769 (patch) | |
| tree | 444dad3dc7e2656992d29f34f7bce31970c122a5 /ffmpeg/libavcodec/psymodel.h | |
| parent | ae5e8541f6e06e64c28719467cdf366ac57aff31 (diff) | |
chasing indexing error
Diffstat (limited to 'ffmpeg/libavcodec/psymodel.h')
| -rw-r--r-- | ffmpeg/libavcodec/psymodel.h | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/ffmpeg/libavcodec/psymodel.h b/ffmpeg/libavcodec/psymodel.h deleted file mode 100644 index d1a126a..0000000 --- a/ffmpeg/libavcodec/psymodel.h +++ /dev/null @@ -1,189 +0,0 @@ -/* - * audio encoder psychoacoustic model - * Copyright (C) 2008 Konstantin Shishkov - * - * This file is part of FFmpeg. - * - * 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. - * - * 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 FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef AVCODEC_PSYMODEL_H -#define AVCODEC_PSYMODEL_H - -#include "avcodec.h" - -/** maximum possible number of bands */ -#define PSY_MAX_BANDS 128 -/** maximum number of channels */ -#define PSY_MAX_CHANS 20 - -#define AAC_CUTOFF(s) (s->bit_rate ? FFMIN3(4000 + s->bit_rate/8, 12000 + s->bit_rate/32, s->sample_rate / 2) : (s->sample_rate / 2)) - -/** - * single band psychoacoustic information - */ -typedef struct FFPsyBand { - int bits; - float energy; - float threshold; - float distortion; - float perceptual_weight; -} FFPsyBand; - -/** - * single channel psychoacoustic information - */ -typedef struct FFPsyChannel { - FFPsyBand psy_bands[PSY_MAX_BANDS]; ///< channel bands information - float entropy; ///< total PE for this channel -} FFPsyChannel; - -/** - * psychoacoustic information for an arbitrary group of channels - */ -typedef struct FFPsyChannelGroup { - FFPsyChannel *ch[PSY_MAX_CHANS]; ///< pointers to the individual channels in the group - uint8_t num_ch; ///< number of channels in this group - uint8_t coupling[PSY_MAX_BANDS]; ///< allow coupling for this band in the group -} FFPsyChannelGroup; - -/** - * windowing related information - */ -typedef struct FFPsyWindowInfo { - int window_type[3]; ///< window type (short/long/transitional, etc.) - current, previous and next - int window_shape; ///< window shape (sine/KBD/whatever) - int num_windows; ///< number of windows in a frame - int grouping[8]; ///< window grouping (for e.g. AAC) - int *window_sizes; ///< sequence of window sizes inside one frame (for eg. WMA) -} FFPsyWindowInfo; - -/** - * context used by psychoacoustic model - */ -typedef struct FFPsyContext { - AVCodecContext *avctx; ///< encoder context - const struct FFPsyModel *model; ///< encoder-specific model functions - - FFPsyChannel *ch; ///< single channel information - FFPsyChannelGroup *group; ///< channel group information - int num_groups; ///< number of channel groups - - uint8_t **bands; ///< scalefactor band sizes for possible frame sizes - int *num_bands; ///< number of scalefactor bands for possible frame sizes - int num_lens; ///< number of scalefactor band sets - - struct { - int size; ///< size of the bitresevoir in bits - int bits; ///< number of bits used in the bitresevoir - } bitres; - - void* model_priv_data; ///< psychoacoustic model implementation private data -} FFPsyContext; - -/** - * codec-specific psychoacoustic model implementation - */ -typedef struct FFPsyModel { - const char *name; - int (*init) (FFPsyContext *apc); - - /** - * Suggest window sequence for channel. - * - * @param ctx model context - * @param audio samples for the current frame - * @param la lookahead samples (NULL when unavailable) - * @param channel number of channel element to analyze - * @param prev_type previous window type - * - * @return suggested window information in a structure - */ - FFPsyWindowInfo (*window)(FFPsyContext *ctx, const float *audio, const float *la, int channel, int prev_type); - - /** - * Perform psychoacoustic analysis and set band info (threshold, energy) for a group of channels. - * - * @param ctx model context - * @param channel channel number of the first channel in the group to perform analysis on - * @param coeffs array of pointers to the transformed coefficients - * @param wi window information for the channels in the group - */ - void (*analyze)(FFPsyContext *ctx, int channel, const float **coeffs, const FFPsyWindowInfo *wi); - - void (*end) (FFPsyContext *apc); -} FFPsyModel; - -/** - * Initialize psychoacoustic model. - * - * @param ctx model context - * @param avctx codec context - * @param num_lens number of possible frame lengths - * @param bands scalefactor band lengths for all frame lengths - * @param num_bands number of scalefactor bands for all frame lengths - * @param num_groups number of channel groups - * @param group_map array with # of channels in group - 1, for each group - * - * @return zero if successful, a negative value if not - */ -int ff_psy_init(FFPsyContext *ctx, AVCodecContext *avctx, int num_lens, - const uint8_t **bands, const int *num_bands, - int num_groups, const uint8_t *group_map); - -/** - * Determine what group a channel belongs to. - * - * @param ctx psymodel context - * @param channel channel to locate the group for - * - * @return pointer to the FFPsyChannelGroup this channel belongs to - */ -FFPsyChannelGroup *ff_psy_find_group(FFPsyContext *ctx, int channel); - -/** - * Cleanup model context at the end. - * - * @param ctx model context - */ -void ff_psy_end(FFPsyContext *ctx); - - -/************************************************************************** - * Audio preprocessing stuff. * - * This should be moved into some audio filter eventually. * - **************************************************************************/ -struct FFPsyPreprocessContext; - -/** - * psychoacoustic model audio preprocessing initialization - */ -struct FFPsyPreprocessContext *ff_psy_preprocess_init(AVCodecContext *avctx); - -/** - * Preprocess several channel in audio frame in order to compress it better. - * - * @param ctx preprocessing context - * @param audio samples to be filtered (in place) - * @param channels number of channel to preprocess - */ -void ff_psy_preprocess(struct FFPsyPreprocessContext *ctx, float **audio, int channels); - -/** - * Cleanup audio preprocessing module. - */ -void ff_psy_preprocess_end(struct FFPsyPreprocessContext *ctx); - -#endif /* AVCODEC_PSYMODEL_H */ |
