mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-11-02 12:32:03 +01:00
Henrik RydgårdandClaude Opus 5.5
d0e3141f43
The ffmpeg submodule held prebuilt libraries for every platform next to the sources (about 1.5 GB checked out), and nothing uses those any more. Only the needed sources are copied in, from the submodule's commit, along with every header and template they include. The path is new, so checking out commits on either side of this works. It's also cut down to what PPSSPP uses: the H.264, AAC, MP3, ATRAC3 and ATRAC3+ decoders, the H.264 parser, the demuxers as before, and the FFV1 encoder, AVI muxer and file protocol for AVI dumping. config.h takes its CONFIG_ values from FFmpeg 3.0.2's own configure run with just those enabled. The raw H.264 demuxer stays even though nothing opens raw H.264: probing PSMF data uses it to identify the video stream's codec, which otherwise comes out as none. On top of that: - The files nothing links (configure would build them, but they're never pulled out of the static library, going by the GCC link map) are left out: mostly libavutil's crypto and hashing and the alternative DCT/IDCT/FFT versions. - libswresample isn't built, now that nothing uses it. - The H.264 decoder only does 8-bit video, which is all the PSP has. The SPS parser rejects any other bit depth, and the DSP files no longer build their 9- to 16-bit variants, which the linker kept because the init functions pick one by bit depth at run time. That's 160 files to compile instead of 277, and 391 of FFmpeg's vendored, about 5.8 MB. The README in ext/ffmpeg has what was done, the PPSSPP patches in the copy, how to add a component, and the tradeoffs. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
241 lines
9.7 KiB
C
241 lines
9.7 KiB
C
/*
|
|
* ATRAC3+ compatible decoder
|
|
*
|
|
* Copyright (c) 2010-2013 Maxim Poliakovski
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Global structures, constants and data for ATRAC3+ decoder.
|
|
*/
|
|
|
|
#ifndef AVCODEC_ATRAC3PLUS_H
|
|
#define AVCODEC_ATRAC3PLUS_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "libavutil/float_dsp.h"
|
|
#include "atrac.h"
|
|
#include "avcodec.h"
|
|
#include "fft.h"
|
|
#include "get_bits.h"
|
|
|
|
/** Global unit sizes */
|
|
#define ATRAC3P_SUBBANDS 16 ///< number of PQF subbands
|
|
#define ATRAC3P_SUBBAND_SAMPLES 128 ///< number of samples per subband
|
|
#define ATRAC3P_FRAME_SAMPLES (ATRAC3P_SUBBAND_SAMPLES * ATRAC3P_SUBBANDS)
|
|
|
|
#define ATRAC3P_PQF_FIR_LEN 12 ///< length of the prototype FIR of the PQF
|
|
|
|
/** Global constants */
|
|
#define ATRAC3P_POWER_COMP_OFF 15 ///< disable power compensation
|
|
|
|
/** ATRAC3+ channel unit types */
|
|
enum Atrac3pChannelUnitTypes {
|
|
CH_UNIT_MONO = 0, ///< unit containing one coded channel
|
|
CH_UNIT_STEREO = 1, ///< unit containing two jointly-coded channels
|
|
CH_UNIT_EXTENSION = 2, ///< unit containing extension information
|
|
CH_UNIT_TERMINATOR = 3 ///< unit sequence terminator
|
|
};
|
|
|
|
/** Per-channel IPQF history */
|
|
typedef struct Atrac3pIPQFChannelCtx {
|
|
DECLARE_ALIGNED(32, float, buf1)[ATRAC3P_PQF_FIR_LEN * 2][8];
|
|
DECLARE_ALIGNED(32, float, buf2)[ATRAC3P_PQF_FIR_LEN * 2][8];
|
|
int pos;
|
|
} Atrac3pIPQFChannelCtx;
|
|
|
|
/** Amplitude envelope of a group of sine waves */
|
|
typedef struct Atrac3pWaveEnvelope {
|
|
int has_start_point; ///< indicates start point within the GHA window
|
|
int has_stop_point; ///< indicates stop point within the GHA window
|
|
int start_pos; ///< start position expressed in n*4 samples
|
|
int stop_pos; ///< stop position expressed in n*4 samples
|
|
} Atrac3pWaveEnvelope;
|
|
|
|
/** Parameters of a group of sine waves */
|
|
typedef struct Atrac3pWavesData {
|
|
Atrac3pWaveEnvelope pend_env; ///< pending envelope from the previous frame
|
|
Atrac3pWaveEnvelope curr_env; ///< group envelope from the current frame
|
|
int num_wavs; ///< number of sine waves in the group
|
|
int start_index; ///< start index into global tones table for that subband
|
|
} Atrac3pWavesData;
|
|
|
|
/** Parameters of a single sine wave */
|
|
typedef struct Atrac3pWaveParam {
|
|
int freq_index; ///< wave frequency index
|
|
int amp_sf; ///< quantized amplitude scale factor
|
|
int amp_index; ///< quantized amplitude index
|
|
int phase_index; ///< quantized phase index
|
|
} Atrac3pWaveParam;
|
|
|
|
/** Sound channel parameters */
|
|
typedef struct Atrac3pChanParams {
|
|
int ch_num;
|
|
int num_coded_vals; ///< number of transmitted quant unit values
|
|
int fill_mode;
|
|
int split_point;
|
|
int table_type; ///< table type: 0 - tone?, 1- noise?
|
|
int qu_wordlen[32]; ///< array of word lengths for each quant unit
|
|
int qu_sf_idx[32]; ///< array of scale factor indexes for each quant unit
|
|
int qu_tab_idx[32]; ///< array of code table indexes for each quant unit
|
|
int16_t spectrum[2048]; ///< decoded IMDCT spectrum
|
|
uint8_t power_levs[5]; ///< power compensation levels
|
|
|
|
/* imdct window shape history (2 frames) for overlapping. */
|
|
uint8_t wnd_shape_hist[2][ATRAC3P_SUBBANDS]; ///< IMDCT window shape, 0=sine/1=steep
|
|
uint8_t *wnd_shape; ///< IMDCT window shape for current frame
|
|
uint8_t *wnd_shape_prev; ///< IMDCT window shape for previous frame
|
|
|
|
/* gain control data history (2 frames) for overlapping. */
|
|
AtracGainInfo gain_data_hist[2][ATRAC3P_SUBBANDS]; ///< gain control data for all subbands
|
|
AtracGainInfo *gain_data; ///< gain control data for next frame
|
|
AtracGainInfo *gain_data_prev; ///< gain control data for previous frame
|
|
int num_gain_subbands; ///< number of subbands with gain control data
|
|
|
|
/* tones data history (2 frames) for overlapping. */
|
|
Atrac3pWavesData tones_info_hist[2][ATRAC3P_SUBBANDS];
|
|
Atrac3pWavesData *tones_info;
|
|
Atrac3pWavesData *tones_info_prev;
|
|
} Atrac3pChanParams;
|
|
|
|
/* Per-unit sine wave parameters */
|
|
typedef struct Atrac3pWaveSynthParams {
|
|
int tones_present; ///< 1 - tones info present
|
|
int amplitude_mode; ///< 1 - low range, 0 - high range
|
|
int num_tone_bands; ///< number of PQF bands with tones
|
|
uint8_t tone_sharing[ATRAC3P_SUBBANDS]; ///< 1 - subband-wise tone sharing flags
|
|
uint8_t tone_master[ATRAC3P_SUBBANDS]; ///< 1 - subband-wise tone channel swapping
|
|
uint8_t invert_phase[ATRAC3P_SUBBANDS]; ///< 1 - subband-wise phase inversion
|
|
int tones_index; ///< total sum of tones in this unit
|
|
Atrac3pWaveParam waves[48];
|
|
} Atrac3pWaveSynthParams;
|
|
|
|
/** Channel unit parameters */
|
|
typedef struct Atrac3pChanUnitCtx {
|
|
/* channel unit variables */
|
|
int unit_type; ///< unit type (mono/stereo)
|
|
int num_quant_units;
|
|
int num_subbands;
|
|
int used_quant_units; ///< number of quant units with coded spectrum
|
|
int num_coded_subbands; ///< number of subbands with coded spectrum
|
|
int mute_flag; ///< mute flag
|
|
int use_full_table; ///< 1 - full table list, 0 - restricted one
|
|
int noise_present; ///< 1 - global noise info present
|
|
int noise_level_index; ///< global noise level index
|
|
int noise_table_index; ///< global noise RNG table index
|
|
uint8_t swap_channels[ATRAC3P_SUBBANDS]; ///< 1 - perform subband-wise channel swapping
|
|
uint8_t negate_coeffs[ATRAC3P_SUBBANDS]; ///< 1 - subband-wise IMDCT coefficients negation
|
|
Atrac3pChanParams channels[2];
|
|
|
|
/* Variables related to GHA tones */
|
|
Atrac3pWaveSynthParams wave_synth_hist[2]; ///< waves synth history for two frames
|
|
Atrac3pWaveSynthParams *waves_info;
|
|
Atrac3pWaveSynthParams *waves_info_prev;
|
|
|
|
Atrac3pIPQFChannelCtx ipqf_ctx[2];
|
|
DECLARE_ALIGNED(32, float, prev_buf)[2][ATRAC3P_FRAME_SAMPLES]; ///< overlapping buffer
|
|
} Atrac3pChanUnitCtx;
|
|
|
|
/**
|
|
* Initialize VLC tables for bitstream parsing.
|
|
*/
|
|
void ff_atrac3p_init_vlcs(void);
|
|
|
|
/**
|
|
* Decode bitstream data of a channel unit.
|
|
*
|
|
* @param[in] gb the GetBit context
|
|
* @param[in,out] ctx ptr to the channel unit context
|
|
* @param[in] num_channels number of channels to process
|
|
* @param[in] avctx ptr to the AVCodecContext
|
|
* @return result code: 0 = OK, otherwise - error code
|
|
*/
|
|
int ff_atrac3p_decode_channel_unit(GetBitContext *gb, Atrac3pChanUnitCtx *ctx,
|
|
int num_channels, AVCodecContext *avctx);
|
|
|
|
/**
|
|
* Initialize IMDCT transform.
|
|
*
|
|
* @param[in] avctx ptr to the AVCodecContext
|
|
* @param[in] mdct_ctx pointer to MDCT transform context
|
|
*/
|
|
void ff_atrac3p_init_imdct(AVCodecContext *avctx, FFTContext *mdct_ctx);
|
|
|
|
/**
|
|
* Initialize sine waves synthesizer.
|
|
*/
|
|
void ff_atrac3p_init_wave_synth(void);
|
|
|
|
/**
|
|
* Synthesize sine waves for a particular subband.
|
|
*
|
|
* @param[in] ch_unit pointer to the channel unit context
|
|
* @param[in] fdsp pointer to float DSP context
|
|
* @param[in] ch_num which channel to process
|
|
* @param[in] sb which subband to process
|
|
* @param[out] out receives processed data
|
|
*/
|
|
void ff_atrac3p_generate_tones(Atrac3pChanUnitCtx *ch_unit, AVFloatDSPContext *fdsp,
|
|
int ch_num, int sb, float *out);
|
|
|
|
/**
|
|
* Perform power compensation aka noise dithering.
|
|
*
|
|
* @param[in] ctx ptr to the channel context
|
|
* @param[in] ch_index which channel to process
|
|
* @param[in,out] sp ptr to channel spectrum to process
|
|
* @param[in] rng_index indicates which RNG table to use
|
|
* @param[in] sb_num which subband to process
|
|
*/
|
|
void ff_atrac3p_power_compensation(Atrac3pChanUnitCtx *ctx, int ch_index,
|
|
float *sp, int rng_index, int sb_num);
|
|
|
|
/**
|
|
* Regular IMDCT and windowing without overlapping,
|
|
* with spectrum reversal in the odd subbands.
|
|
*
|
|
* @param[in] fdsp pointer to float DSP context
|
|
* @param[in] mdct_ctx pointer to MDCT transform context
|
|
* @param[in] pIn float input
|
|
* @param[out] pOut float output
|
|
* @param[in] wind_id which MDCT window to apply
|
|
* @param[in] sb subband number
|
|
*/
|
|
void ff_atrac3p_imdct(AVFloatDSPContext *fdsp, FFTContext *mdct_ctx, float *pIn,
|
|
float *pOut, int wind_id, int sb);
|
|
|
|
/**
|
|
* Subband synthesis filter based on the polyphase quadrature (pseudo-QMF)
|
|
* filter bank.
|
|
*
|
|
* @param[in] dct_ctx ptr to the pre-initialized IDCT context
|
|
* @param[in,out] hist ptr to the filter history
|
|
* @param[in] in input data to process
|
|
* @param[out] out receives processed data
|
|
*/
|
|
void ff_atrac3p_ipqf(FFTContext *dct_ctx, Atrac3pIPQFChannelCtx *hist,
|
|
const float *in, float *out);
|
|
|
|
extern const uint16_t ff_atrac3p_qu_to_spec_pos[33];
|
|
extern const float ff_atrac3p_sf_tab[64];
|
|
extern const float ff_atrac3p_mant_tab[8];
|
|
|
|
#endif /* AVCODEC_ATRAC3PLUS_H */
|