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ffmpeg.wasm-core
Commit fed0de37 authored by Paul B Mahol's avatar Paul B Mahol
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avcodec: add CRI HCA decoder

parent 0bbc4914
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View file @ fed0de37
......@@ -52,6 +52,7 @@ version <next>:
- FWSE demuxer
- DERF DPCM decoder
- DERF demuxer
- CRI HCA decoder
version 4.2:
......
libavcodec/Makefile
View file @ fed0de37
......@@ -367,6 +367,7 @@ OBJS-$(CONFIG_H264_V4L2M2M_DECODER) += v4l2_m2m_dec.o
OBJS-$(CONFIG_H264_V4L2M2M_ENCODER) += v4l2_m2m_enc.o
OBJS-$(CONFIG_HAP_DECODER) += hapdec.o hap.o
OBJS-$(CONFIG_HAP_ENCODER) += hapenc.o hap.o
OBJS-$(CONFIG_HCA_DECODER) += hcadec.o
OBJS-$(CONFIG_HCOM_DECODER) += hcom.o
OBJS-$(CONFIG_HEVC_DECODER) += hevcdec.o hevc_mvs.o \
hevc_cabac.o hevc_refs.o hevcpred.o \
......
libavcodec/allcodecs.c
View file @ fed0de37
......@@ -432,6 +432,7 @@ extern AVCodec ff_g723_1_decoder;
extern AVCodec ff_g729_decoder;
extern AVCodec ff_gsm_decoder;
extern AVCodec ff_gsm_ms_decoder;
extern AVCodec ff_hca_decoder;
extern AVCodec ff_hcom_decoder;
extern AVCodec ff_iac_decoder;
extern AVCodec ff_ilbc_decoder;
......
libavcodec/avcodec.h
View file @ fed0de37
......@@ -668,6 +668,7 @@ enum AVCodecID {
AV_CODEC_ID_ACELP_KELVIN,
AV_CODEC_ID_MPEGH_3D_AUDIO,
AV_CODEC_ID_SIREN,
AV_CODEC_ID_HCA,
/* subtitle codecs */
AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
......
libavcodec/codec_desc.c
View file @ fed0de37
......@@ -3079,6 +3079,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("Siren"),
.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
},
{
.id = AV_CODEC_ID_HCA,
.type = AVMEDIA_TYPE_AUDIO,
.name = "hca",
.long_name = NULL_IF_CONFIG_SMALL("CRI HCA"),
.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
},
/* subtitle codecs */
{
......
libavcodec/hca_data.h 0 → 100644
View file @ fed0de37
/*
* 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_HCA_DATA_H
#define AVCODEC_HCA_DATA_H
#include <stdint.h>
static const uint8_t max_bits_table[] = {
0, 2, 3, 3, 4, 4, 4, 4, 5, 6, 7, 8, 9, 10, 11, 12,
};
static const uint8_t quant_spectrum_bits[] =
{
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,
2,2,2,2,2,2,3,3,0,0,0,0,0,0,0,0,
2,2,3,3,3,3,3,3,0,0,0,0,0,0,0,0,
3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,
3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,
3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,
3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
};
static const int8_t quant_spectrum_value[] =
{
+0,+0,+0,+0,+0,+0,+0,+0,+0,+0,+0,+0,+0,+0,+0,+0,
+0,+0,+1,-1,+0,+0,+0,+0,+0,+0,+0,+0,+0,+0,+0,+0,
+0,+0,+1,+1,-1,-1,+2,-2,+0,+0,+0,+0,+0,+0,+0,+0,
+0,+0,+1,-1,+2,-2,+3,-3,+0,+0,+0,+0,+0,+0,+0,+0,
+0,+0,+1,+1,-1,-1,+2,+2,-2,-2,+3,+3,-3,-3,+4,-4,
+0,+0,+1,+1,-1,-1,+2,+2,-2,-2,+3,-3,+4,-4,+5,-5,
+0,+0,+1,+1,-1,-1,+2,-2,+3,-3,+4,-4,+5,-5,+6,-6,
+0,+0,+1,-1,+2,-2,+3,-3,+4,-4,+5,-5,+6,-6,+7,-7,
};
static const uint8_t scale_table[] =
{
15, 14, 14, 14, 14, 14, 14, 13, 13,
13, 13, 13, 13, 12, 12, 12, 12,
12, 12, 11, 11, 11, 11, 11, 11,
10, 10, 10, 10, 10, 10, 10, 9,
9, 9, 9, 9, 9, 8, 8, 8,
8, 8, 8, 7, 6, 6, 5, 4,
4, 4, 3, 3, 3, 2, 2, 2,
2, 1,
};
static const float window[128] =
{
0.000690534, 0.00197623, 0.00367386, 0.00572424, 0.0080967, 0.0107732, 0.0137425, 0.0169979,
0.0205353, 0.0243529, 0.0284505, 0.0328291, 0.0374906, 0.0424379, 0.0476744, 0.0532043,
0.0590321, 0.0651629, 0.071602, 0.0783552, 0.0854285, 0.092828, 0.10056, 0.108631,
0.117048, 0.125817, 0.134944, 0.144437, 0.1543, 0.164539, 0.175161, 0.186169,
0.197569, 0.209363, 0.221555, 0.234145, 0.247136, 0.260526, 0.274313, 0.288493,
0.303062, 0.318012, 0.333333, 0.349015, 0.365044, 0.381403, 0.398073, 0.415034,
0.43226, 0.449725, 0.4674, 0.485251, 0.503245, 0.521344, 0.539509, 0.557698,
0.575869, 0.593978, 0.611981, 0.629831, 0.647486, 0.6649, 0.682031, 0.698838,
0.71528, 0.731323, 0.746932, 0.762077, 0.776732, 0.790873, 0.804481, 0.817542,
0.830044, 0.84198, 0.853347, 0.864144, 0.874375, 0.884046, 0.893167, 0.901749,
0.909806, 0.917354, 0.924409, 0.93099, 0.937117, 0.942809, 0.948087, 0.952971,
0.957482, 0.961641, 0.965467, 0.968981, 0.972202, 0.975148, 0.977838, 0.980289,
0.982518, 0.98454, 0.986371, 0.988024, 0.989514, 0.990853, 0.992053, 0.993126,
0.994082, 0.994931, 0.995682, 0.996344, 0.996926, 0.997433, 0.997875, 0.998256,
0.998584, 0.998863, 0.999099, 0.999297, 0.999461, 0.999595, 0.999703, 0.999789,
0.999856, 0.999906, 0.999942, 0.999967, 0.999984, 0.999993, 0.999998, 1.0,
};
static const float intensity_ratio_table[] =
{
2.0, 1.85714, 1.71429, 1.57143, 1.42857, 1.28571, 1.14286, 1.0,
0.857143, 0.714286, 0.571429, 0.428571, 0.285714, 0.142857, 0.0, 0.0,
0, 1.87066e-08, 2.49253e-08, 3.32113e-08, 4.42518e-08, 5.89626e-08, 7.85637e-08, 1.04681e-07,
1.3948e-07, 1.85848e-07, 2.4763e-07, 3.2995e-07, 4.39636e-07, 5.85785e-07, 7.80519e-07, 1.03999e-06,
1.38572e-06, 1.84637e-06, 2.46017e-06, 3.27801e-06, 4.36772e-06, 5.8197e-06, 7.75435e-06, 1.03321e-05,
1.37669e-05, 1.83435e-05, 2.44414e-05, 3.25665e-05, 4.33927e-05, 5.78179e-05, 7.70384e-05, 0.000102648,
0.000136772, 0.00018224, 0.000242822, 0.000323544, 0.000431101, 0.000574413, 0.000765366, 0.0010198,
0.00135881, 0.00181053, 0.0024124, 0.00321437, 0.00428293, 0.00570671, 0.00760381, 0.0101316,
0.0134996, 0.0179873, 0.0239669, 0.0319343, 0.0425503, 0.0566954, 0.0755428, 0.100656,
0.134117, 0.178702, 0.238108, 0.317263, 0.422731, 0.563261, 0.750507, 0.0,
};
static const float scale_conversion_table[] =
{
1.0, 1.33243, 1.77538, 2.36557, 3.15196, 4.19978, 5.59592, 7.45618,
9.93486, 13.2375, 17.6381, 23.5016, 31.3143, 41.7242, 55.5947, 74.0762,
98.7015, 131.513, 175.232, 233.485, 311.103, 414.524, 552.326, 735.937,
980.586, 1306.56, 1740.91, 2319.64, 3090.77, 4118.24, 5487.28, 7311.43,
9741.98, 12980.5, 17295.7, 23045.3, 30706.4, 40914.2, 54515.4, 72638,
96785.3, 128960, 171830, 228952, 305064, 406477, 541603, 721649,
961548, 1.2812e+06, 1.70711e+06, 2.27461e+06, 3.03076e+06, 4.03829e+06, 5.38075e+06, 7.16948e+06,
9.55285e+06, 1.27285e+07, 1.69599e+07, 2.25979e+07, 3.01102e+07, 4.01198e+07, 5.3457e+07, 0,
};
static const float dequantizer_scaling_table[] =
{
1.58838e-07, 2.11641e-07, 2.81998e-07, 3.75743e-07, 5.00652e-07, 6.67085e-07, 8.88846e-07, 1.18433e-06,
1.57804e-06, 2.10263e-06, 2.80161e-06, 3.73296e-06, 4.97391e-06, 6.6274e-06, 8.83057e-06, 1.17661e-05,
1.56776e-05, 2.08893e-05, 2.78336e-05, 3.70864e-05, 4.94151e-05, 6.58423e-05, 8.77305e-05, 0.000116895,
0.000155755, 0.000207533, 0.000276523, 0.000368448, 0.000490933, 0.000654135, 0.00087159, 0.00116134,
0.0015474, 0.00206181, 0.00274722, 0.00366048, 0.00487735, 0.00649874, 0.00865913, 0.0115377,
0.0153732, 0.0204838, 0.0272932, 0.0363664, 0.0484558, 0.0645641, 0.0860272, 0.114626,
0.152731, 0.203503, 0.271155, 0.361295, 0.481401, 0.641435, 0.854669, 1.13879,
1.51736, 2.02178, 2.69388, 3.58942, 4.78266, 6.37257, 8.49102, 11.3137,
};
static const float quant_step_size[] =
{
0.0, 0.666667, 0.4, 0.285714, 0.222222, 0.181818, 0.153846, 0.133333, 0.0645161,
0.031746, 0.015748, 0.00784314, 0.00391389, 0.00195503, 0.00097704, 0.000488401,
};
static const uint8_t ath_base_curve[656] =
{
0x78,0x5F,0x56,0x51,0x4E,0x4C,0x4B,0x49,0x48,0x48,0x47,0x46,0x46,0x45,0x45,0x45,
0x44,0x44,0x44,0x44,0x43,0x43,0x43,0x43,0x43,0x43,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x40,0x40,0x40,0x40,
0x40,0x40,0x40,0x40,0x40,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,
0x3F,0x3F,0x3F,0x3E,0x3E,0x3E,0x3E,0x3E,0x3E,0x3D,0x3D,0x3D,0x3D,0x3D,0x3D,0x3D,
0x3C,0x3C,0x3C,0x3C,0x3C,0x3C,0x3C,0x3C,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,
0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,
0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3B,0x3C,0x3C,0x3C,0x3C,0x3C,0x3C,0x3C,0x3C,
0x3D,0x3D,0x3D,0x3D,0x3D,0x3D,0x3D,0x3D,0x3E,0x3E,0x3E,0x3E,0x3E,0x3E,0x3E,0x3F,
0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,
0x3F,0x3F,0x3F,0x3F,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,
0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x43,0x43,0x43,
0x43,0x43,0x43,0x43,0x43,0x43,0x43,0x43,0x43,0x43,0x43,0x43,0x43,0x43,0x44,0x44,
0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x45,0x45,0x45,0x45,
0x45,0x45,0x45,0x45,0x45,0x45,0x45,0x45,0x46,0x46,0x46,0x46,0x46,0x46,0x46,0x46,
0x46,0x46,0x47,0x47,0x47,0x47,0x47,0x47,0x47,0x47,0x47,0x47,0x48,0x48,0x48,0x48,
0x48,0x48,0x48,0x48,0x49,0x49,0x49,0x49,0x49,0x49,0x49,0x49,0x4A,0x4A,0x4A,0x4A,
0x4A,0x4A,0x4A,0x4A,0x4B,0x4B,0x4B,0x4B,0x4B,0x4B,0x4B,0x4C,0x4C,0x4C,0x4C,0x4C,
0x4C,0x4D,0x4D,0x4D,0x4D,0x4D,0x4D,0x4E,0x4E,0x4E,0x4E,0x4E,0x4E,0x4F,0x4F,0x4F,
0x4F,0x4F,0x4F,0x50,0x50,0x50,0x50,0x50,0x51,0x51,0x51,0x51,0x51,0x52,0x52,0x52,
0x52,0x52,0x53,0x53,0x53,0x53,0x54,0x54,0x54,0x54,0x54,0x55,0x55,0x55,0x55,0x56,
0x56,0x56,0x56,0x57,0x57,0x57,0x57,0x57,0x58,0x58,0x58,0x59,0x59,0x59,0x59,0x5A,
0x5A,0x5A,0x5A,0x5B,0x5B,0x5B,0x5B,0x5C,0x5C,0x5C,0x5D,0x5D,0x5D,0x5D,0x5E,0x5E,
0x5E,0x5F,0x5F,0x5F,0x60,0x60,0x60,0x61,0x61,0x61,0x61,0x62,0x62,0x62,0x63,0x63,
0x63,0x64,0x64,0x64,0x65,0x65,0x66,0x66,0x66,0x67,0x67,0x67,0x68,0x68,0x68,0x69,
0x69,0x6A,0x6A,0x6A,0x6B,0x6B,0x6B,0x6C,0x6C,0x6D,0x6D,0x6D,0x6E,0x6E,0x6F,0x6F,
0x70,0x70,0x70,0x71,0x71,0x72,0x72,0x73,0x73,0x73,0x74,0x74,0x75,0x75,0x76,0x76,
0x77,0x77,0x78,0x78,0x78,0x79,0x79,0x7A,0x7A,0x7B,0x7B,0x7C,0x7C,0x7D,0x7D,0x7E,
0x7E,0x7F,0x7F,0x80,0x80,0x81,0x81,0x82,0x83,0x83,0x84,0x84,0x85,0x85,0x86,0x86,
0x87,0x88,0x88,0x89,0x89,0x8A,0x8A,0x8B,0x8C,0x8C,0x8D,0x8D,0x8E,0x8F,0x8F,0x90,
0x90,0x91,0x92,0x92,0x93,0x94,0x94,0x95,0x95,0x96,0x97,0x97,0x98,0x99,0x99,0x9A,
0x9B,0x9B,0x9C,0x9D,0x9D,0x9E,0x9F,0xA0,0xA0,0xA1,0xA2,0xA2,0xA3,0xA4,0xA5,0xA5,
0xA6,0xA7,0xA7,0xA8,0xA9,0xAA,0xAA,0xAB,0xAC,0xAD,0xAE,0xAE,0xAF,0xB0,0xB1,0xB1,
0xB2,0xB3,0xB4,0xB5,0xB6,0xB6,0xB7,0xB8,0xB9,0xBA,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,
0xC0,0xC1,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xC9,0xCA,0xCB,0xCC,0xCD,
0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,
0xDE,0xDF,0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xED,0xEE,
0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFF,0xFF,
};
#endif /* AVCODEC_HCA_DATA_H */
libavcodec/hcadec.c 0 → 100644
View file @ fed0de37
/*
* 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
*/
#include "libavutil/crc.h"
#include "libavutil/float_dsp.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/tx.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "hca_data.h"
typedef struct ChannelContext {
float base[128];
DECLARE_ALIGNED(32, float, imdct_in)[128];
DECLARE_ALIGNED(32, float, imdct_out)[128];
DECLARE_ALIGNED(32, float, imdct_prev)[128];
int8_t scale_factors[128];
uint8_t scale[128];
int8_t intensity[8];
int8_t *hfr_scale;
unsigned count;
int chan_type;
} ChannelContext;
typedef struct HCAContext {
GetBitContext gb;
const AVCRC *crc_table;
ChannelContext ch[16];
uint8_t ath[128];
int ath_type;
unsigned hfr_group_count;
uint8_t track_count;
uint8_t channel_config;
uint8_t total_band_count;
uint8_t base_band_count;
uint8_t stereo_band_count;
uint8_t bands_per_hfr_group;
av_tx_fn tx_fn;
AVTXContext *tx_ctx;
AVFloatDSPContext *fdsp;
} HCAContext;
static void ath_init1(uint8_t *ath, int sample_rate)
{
unsigned int index;
unsigned int acc = 0;
for (int i = 0; i < 128; i++) {
acc += sample_rate;
index = acc >> 13;
if (index >= 654) {
memset(ath+i, 0xFF, (128 - i));
break;
}
ath[i] = ath_base_curve[index];
}
}
static int ath_init(uint8_t *ath, int type, int sample_rate)
{
switch (type) {
case 0:
/* nothing to do */
break;
case 1:
ath_init1(ath, sample_rate);
break;
default:
return AVERROR_INVALIDDATA;
}
return 0;
}
static inline unsigned ceil2(unsigned a, unsigned b)
{
return (b > 0) ? (a / b + ((a % b) ? 1 : 0)) : 0;
}
static av_cold int decode_init(AVCodecContext *avctx)
{
HCAContext *c = avctx->priv_data;
GetBitContext *gb = &c->gb;
int8_t r[16] = { 0 };
float scale = 1.f / 8.f;
unsigned b, chunk;
int version, ret;
avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
c->crc_table = av_crc_get_table(AV_CRC_16_ANSI);
if (avctx->channels <= 0 || avctx->channels > 16)
return AVERROR(EINVAL);
ret = init_get_bits8(gb, avctx->extradata, avctx->extradata_size);
if (ret < 0)
return ret;
skip_bits_long(gb, 32);
version = get_bits(gb, 16);
skip_bits_long(gb, 16);
c->ath_type = version >= 0x200 ? 0 : 1;
if (get_bits_long(gb, 32) != MKBETAG('f', 'm', 't', 0))
return AVERROR_INVALIDDATA;
skip_bits_long(gb, 32);
skip_bits_long(gb, 32);
skip_bits_long(gb, 32);
chunk = get_bits_long(gb, 32);
if (chunk == MKBETAG('c', 'o', 'm', 'p')) {
skip_bits_long(gb, 16);
skip_bits_long(gb, 8);
skip_bits_long(gb, 8);
c->track_count = get_bits(gb, 8);
c->channel_config = get_bits(gb, 8);
c->total_band_count = get_bits(gb, 8);
c->base_band_count = get_bits(gb, 8);
c->stereo_band_count = get_bits(gb, 8);
c->bands_per_hfr_group = get_bits(gb, 8);
} else if (chunk == MKBETAG('d', 'e', 'c', 0)) {
skip_bits_long(gb, 16);
skip_bits_long(gb, 8);
skip_bits_long(gb, 8);
c->total_band_count = get_bits(gb, 8) + 1;
c->base_band_count = get_bits(gb, 8) + 1;
c->track_count = get_bits(gb, 4);
c->channel_config = get_bits(gb, 4);
if (!get_bits(gb, 8))
c->base_band_count = c->total_band_count;
c->stereo_band_count = c->total_band_count - c->base_band_count;
c->bands_per_hfr_group = 0;
} else
return AVERROR_INVALIDDATA;
while (get_bits_left(gb) >= 32) {
chunk = get_bits_long(gb, 32);
if (chunk == MKBETAG('v', 'b', 'r', 0)) {
skip_bits_long(gb, 16);
skip_bits_long(gb, 16);
} else if (chunk == MKBETAG('a', 't', 'h', 0)) {
c->ath_type = get_bits(gb, 16);
} else if (chunk == MKBETAG('r', 'v', 'a', 0)) {
skip_bits_long(gb, 32);
} else if (chunk == MKBETAG('c', 'o', 'm', 'm')) {
skip_bits_long(gb, get_bits(gb, 8) * 8);
} else if (chunk == MKBETAG('c', 'i', 'p', 'h')) {
skip_bits_long(gb, 16);
} else if (chunk == MKBETAG('l', 'o', 'o', 'p')) {
skip_bits_long(gb, 32);
skip_bits_long(gb, 32);
skip_bits_long(gb, 16);
skip_bits_long(gb, 16);
} else if (chunk == MKBETAG('p', 'a', 'd', 0)) {
break;
} else {
break;
}
}
ret = ath_init(c->ath, c->ath_type, avctx->sample_rate);
if (ret < 0)
return ret;
if (!c->track_count)
c->track_count = 1;
b = avctx->channels / c->track_count;
if (c->stereo_band_count && b > 1) {
int8_t *x = r;
for (int i = 0; i < c->track_count; i++, x+=b) {
switch (b) {
case 2:
case 3:
x[0] = 1;
x[1] = 2;
break;
case 4:
x[0]=1; x[1] = 2;
if (c->channel_config == 0) {
x[2]=1;
x[3]=2;
}
break;
case 5:
x[0]=1; x[1] = 2;
if (c->channel_config <= 2) {
x[3]=1;
x[4]=2;
}
break;
case 6:
case 7:
x[0] = 1; x[1] = 2; x[4] = 1; x[5] = 2;
break;
case 8:
x[0] = 1; x[1] = 2; x[4] = 1; x[5] = 2; x[6] = 1; x[7] = 2;
break;
}
}
}
if (c->total_band_count < c->base_band_count)
return AVERROR_INVALIDDATA;
c->hfr_group_count = ceil2(c->total_band_count - (c->base_band_count + c->stereo_band_count),
c->bands_per_hfr_group);
if (c->base_band_count + c->stereo_band_count + (unsigned long)c->hfr_group_count > 128ULL)
return AVERROR_INVALIDDATA;
for (int i = 0; i < avctx->channels; i++) {
c->ch[i].chan_type = r[i];
c->ch[i].count = c->base_band_count + ((r[i] != 2) ? c->stereo_band_count : 0);
c->ch[i].hfr_scale = &c->ch[i].scale_factors[c->base_band_count + c->stereo_band_count];
if (c->ch[i].count > 128)
return AVERROR_INVALIDDATA;
}
c->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
if (!c->fdsp)
return AVERROR(ENOMEM);
return av_tx_init(&c->tx_ctx, &c->tx_fn, AV_TX_FLOAT_MDCT, 1, 128, &scale, 0);
}
static void run_imdct(HCAContext *c, ChannelContext *ch, int index, float *out)
{
c->tx_fn(c->tx_ctx, ch->imdct_out, ch->imdct_in, sizeof(float));
c->fdsp->vector_fmul_window(out, ch->imdct_prev + (128 >> 1),
ch->imdct_out, window, 128 >> 1);
memcpy(ch->imdct_prev, ch->imdct_out, 128 * sizeof(float));
}
static void apply_intensity_stereo(HCAContext *s, ChannelContext *ch1, ChannelContext *ch2,
int index, unsigned band_count, unsigned base_band_count,
unsigned stereo_band_count)
{
float ratio_l = intensity_ratio_table[ch1->intensity[index]];
float ratio_r = ratio_l - 2.0f;
float *c1 = &ch1->imdct_in[base_band_count];
float *c2 = &ch2->imdct_in[base_band_count];
if (ch1->chan_type != 1 || !stereo_band_count)
return;
for (int i = 0; i < band_count; i++) {
*(c2++) = *c1 * ratio_r;
*(c1++) *= ratio_l;
}
}
static void reconstruct_hfr(HCAContext *s, ChannelContext *ch,
unsigned hfr_group_count,
unsigned bands_per_hfr_group,
unsigned start_band, unsigned total_band_count)
{
if (ch->chan_type == 2 || !bands_per_hfr_group)
return;
for (int i = 0, k = start_band, l = start_band - 1; i < hfr_group_count; i++){
for (int j = 0; j < bands_per_hfr_group && k < total_band_count; j++, k++, l--){
ch->imdct_in[k] = scale_conversion_table[ch->hfr_scale[i] - ch->scale_factors[l]] * ch->imdct_in[l];
}
}
ch->imdct_in[127] = 0;
}
static void dequantize_coefficients(HCAContext *c, ChannelContext *ch)
{
GetBitContext *gb = &c->gb;
for (int i = 0; i < ch->count; i++) {
unsigned scale = ch->scale[i];
int nb_bits = max_bits_table[scale];
int value = get_bitsz(gb, nb_bits);
float factor;
if (scale > 7) {
value = (1 - ((value & 1) << 1)) * (value >> 1);
if (!value)
skip_bits_long(gb, -1);
factor = value;
} else {
value += scale << 4;
skip_bits_long(gb, quant_spectrum_bits[value] - nb_bits);
factor = quant_spectrum_value[value];
}
ch->imdct_in[i] = factor * ch->base[i];
}
memset(ch->imdct_in + ch->count, 0, sizeof(ch->imdct_in) - ch->count * sizeof(ch->imdct_in[0]));
}
static void unpack(HCAContext *c, ChannelContext *ch,
unsigned hfr_group_count,
int packed_noise_level,
const uint8_t *ath)
{
GetBitContext *gb = &c->gb;
int delta_bits = get_bits(gb, 3);
if (delta_bits > 5) {
for (int i = 0; i < ch->count; i++)
ch->scale_factors[i] = get_bits(gb, 6);
} else if (delta_bits) {
int factor = get_bits(gb, 6);
int max_value = (1 << delta_bits) - 1;
int half_max = max_value >> 1;
ch->scale_factors[0] = factor;
for (int i = 1; i < ch->count; i++){
int delta = get_bits(gb, delta_bits);
if (delta == max_value) {
factor = get_bits(gb, 6);
} else {
factor += delta - half_max;
}
ch->scale_factors[i] = factor;
}
} else {
memset(ch->scale_factors, 0, 128);
}
if (ch->chan_type == 2){
ch->intensity[0] = get_bits(gb, 4);
if (ch->intensity[0] < 15) {
for (int i = 1; i < 8; i++)
ch->intensity[i] = get_bits(gb, 4);
}
} else {
for (int i = 0; i < hfr_group_count; i++)
ch->hfr_scale[i] = get_bits(gb, 6);
}
for (int i = 0; i < ch->count; i++) {
int scale = ch->scale_factors[i];
if (scale) {
scale = c->ath[i] + ((packed_noise_level + i) >> 8) - ((scale * 5) >> 1) + 2;
scale = scale_table[av_clip(scale, 0, 58)];
}
ch->scale[i] = scale;
}
memset(ch->scale + ch->count, 0, sizeof(ch->scale) - ch->count);
for (int i = 0; i < ch->count; i++)
ch->base[i] = dequantizer_scaling_table[ch->scale_factors[i]] * quant_step_size[ch->scale[i]];
}
static int decode_frame(AVCodecContext *avctx, void *data,
int *got_frame_ptr, AVPacket *avpkt)
{
AVFrame *frame = data;
HCAContext *c = avctx->priv_data;
int ch, ret, packed_noise_level;
GetBitContext *gb = &c->gb;
float **samples;
if (avctx->err_recognition & AV_EF_CRCCHECK) {
if (av_crc(c->crc_table, 0, avpkt->data, avpkt->size))
return AVERROR_INVALIDDATA;
}
if ((ret = init_get_bits8(gb, avpkt->data, avpkt->size)) < 0)
return ret;
if (get_bits(gb, 16) != 0xFFFF)
return AVERROR_INVALIDDATA;
frame->nb_samples = 1024;
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
samples = (float **)frame->extended_data;
packed_noise_level = (get_bits(gb, 9) << 8) - get_bits(gb, 7);
for (ch = 0; ch < avctx->channels; ch++)
unpack(c, &c->ch[ch], c->hfr_group_count, packed_noise_level, c->ath);
for (int i = 0; i < 8; i++) {
for (ch = 0; ch < avctx->channels; ch++)
dequantize_coefficients(c, &c->ch[ch]);
for (ch = 0; ch < avctx->channels; ch++)
reconstruct_hfr(c, &c->ch[ch], c->hfr_group_count, c->bands_per_hfr_group,
c->stereo_band_count + c->base_band_count, c->total_band_count);
for (ch = 0; ch < avctx->channels - 1; ch++)
apply_intensity_stereo(c, &c->ch[ch], &c->ch[ch+1], i,
c->total_band_count - c->base_band_count,
c->base_band_count, c->stereo_band_count);
for (ch = 0; ch < avctx->channels; ch++)
run_imdct(c, &c->ch[ch], i, samples[ch] + i * 128);
}
*got_frame_ptr = 1;
return avpkt->size;
}
static av_cold int decode_close(AVCodecContext *avctx)
{
HCAContext *c = avctx->priv_data;
av_freep(&c->fdsp);
av_tx_uninit(&c->tx_ctx);
return 0;
}
AVCodec ff_hca_decoder = {
.name = "hca",
.long_name = NULL_IF_CONFIG_SMALL("CRI HCA"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_HCA,
.priv_data_size = sizeof(HCAContext),
.init = decode_init,
.decode = decode_frame,
.close = decode_close,
.capabilities = AV_CODEC_CAP_DR1,
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
AV_SAMPLE_FMT_NONE },
};
libavcodec/version.h
View file @ fed0de37
......@@ -28,7 +28,7 @@
#include "libavutil/version.h"
#define LIBAVCODEC_VERSION_MAJOR 58
#define LIBAVCODEC_VERSION_MINOR 75
#define LIBAVCODEC_VERSION_MINOR 76
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
......
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