diff --git a/cmd/calls/audio.go b/cmd/calls/audio.go index d4eb070..12fbadf 100644 --- a/cmd/calls/audio.go +++ b/cmd/calls/audio.go @@ -4,7 +4,7 @@ import ( "fmt" "time" - "dynatron.me/x/stillbox/internal/minimp3" + "dynatron.me/x/go-minimp3" "github.com/hajimehoshi/oto" ) diff --git a/go.mod b/go.mod index eb3e56d..341fef5 100644 --- a/go.mod +++ b/go.mod @@ -1,8 +1,9 @@ module dynatron.me/x/stillbox -go 1.21.12 +go 1.22.5 require ( + dynatron.me/x/go-minimp3 v0.0.0-20240805171536-7ea857e216d6 github.com/go-chi/chi v1.5.5 github.com/go-chi/chi/v5 v5.1.0 github.com/go-chi/httprate v0.9.0 diff --git a/go.sum b/go.sum index f4f2c56..d1ef2f3 100644 --- a/go.sum +++ b/go.sum @@ -1,3 +1,5 @@ +dynatron.me/x/go-minimp3 v0.0.0-20240805171536-7ea857e216d6 h1:04vlkvfe/mkY4CFpMj0TnrwS2uUiYnyAxe/WxhR0Xgs= +dynatron.me/x/go-minimp3 v0.0.0-20240805171536-7ea857e216d6/go.mod h1:zgYpOsy9VkbzyavLQARfhavkKybknoJyQz0pSBjnWwU= github.com/Azure/go-ansiterm v0.0.0-20230124172434-306776ec8161 h1:L/gRVlceqvL25UVaW/CKtUDjefjrs0SPonmDGUVOYP0= github.com/Azure/go-ansiterm v0.0.0-20230124172434-306776ec8161/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E= github.com/Microsoft/go-winio v0.6.1 h1:9/kr64B9VUZrLm5YYwbGtUJnMgqWVOdUAXu6Migciow= diff --git a/internal/minimp3/LICENSE b/internal/minimp3/LICENSE deleted file mode 100644 index 0265db7..0000000 --- a/internal/minimp3/LICENSE +++ /dev/null @@ -1,3 +0,0 @@ -This is vendored from https://github.com/tosone/minimp3. - -tosone/minimp3 is MIT licensed, minimp3 itself is PD. diff --git a/internal/minimp3/decode.go b/internal/minimp3/decode.go deleted file mode 100644 index f3658fc..0000000 --- a/internal/minimp3/decode.go +++ /dev/null @@ -1,215 +0,0 @@ -package minimp3 - -/* -#define MINIMP3_IMPLEMENTATION - -#include "minimp3.h" -#include -#include - -int decode(mp3dec_t *dec, mp3dec_frame_info_t *info, unsigned char *data, int *length, unsigned char *decoded, int *decoded_length) { - int samples; - short pcm[MINIMP3_MAX_SAMPLES_PER_FRAME]; - samples = mp3dec_decode_frame(dec, data, *length, pcm, info); - *decoded_length = samples * info->channels * 2; - *length -= info->frame_bytes; - unsigned char buffer[samples * info->channels * 2]; - memcpy(buffer, (unsigned char*)&(pcm), sizeof(short) * samples * info->channels); - memcpy(decoded, buffer, sizeof(short) * samples * info->channels); - return info->frame_bytes; -} -*/ -import "C" -import ( - "context" - "io" - "sync" - "time" - "unsafe" -) - -const maxSamplesPerFrame = 1152 * 2 - -// Decoder decode the mp3 stream by minimp3 -type Decoder struct { - readerLocker *sync.Mutex - data []byte - decoderLocker *sync.Mutex - decodedData []byte - decode C.mp3dec_t - info C.mp3dec_frame_info_t - context context.Context - contextCancel context.CancelFunc - SampleRate int - Channels int - Kbps int - Layer int - - originalEof bool // if the original reader is EOF, set this to true -} - -// BufferSize Decoded data buffer size. -var BufferSize = 1024 * 10 - -// WaitForDataDuration wait for the data time duration. -var WaitForDataDuration = time.Millisecond * 10 - -// NewDecoder decode mp3 stream and get a Decoder for read the raw data to play. -func NewDecoder(reader io.Reader) (dec *Decoder, err error) { - dec = new(Decoder) - dec.readerLocker = new(sync.Mutex) - dec.decoderLocker = new(sync.Mutex) - dec.context, dec.contextCancel = context.WithCancel(context.Background()) - dec.decode = C.mp3dec_t{} - C.mp3dec_init(&dec.decode) - dec.info = C.mp3dec_frame_info_t{} - go func() { - for { - select { - case <-dec.context.Done(): - return - default: - } - if len(dec.data) > BufferSize { - <-time.After(WaitForDataDuration) - continue - } - var data = make([]byte, 512) - var n int - n, err = reader.Read(data) - - dec.readerLocker.Lock() - dec.data = append(dec.data, data[:n]...) - dec.readerLocker.Unlock() - if err == io.EOF { - dec.originalEof = true - break - } - if err != nil { - dec.originalEof = true - break - } - } - }() - go func() { - for { - select { - case <-dec.context.Done(): - return - default: - } - if len(dec.decodedData) > BufferSize { - <-time.After(WaitForDataDuration) - continue - } - var decoded = [maxSamplesPerFrame * 2]byte{} - var decodedLength = C.int(0) - var length = C.int(len(dec.data)) - if len(dec.data) == 0 { - <-time.After(WaitForDataDuration) - continue - } - frameSize := C.decode(&dec.decode, &dec.info, - (*C.uchar)(unsafe.Pointer(&dec.data[0])), - &length, (*C.uchar)(unsafe.Pointer(&decoded[0])), - &decodedLength) - if int(frameSize) == 0 { - <-time.After(WaitForDataDuration) - continue - } - dec.SampleRate = int(dec.info.hz) - dec.Channels = int(dec.info.channels) - dec.Kbps = int(dec.info.bitrate_kbps) - dec.Layer = int(dec.info.layer) - dec.readerLocker.Lock() - dec.decoderLocker.Lock() - dec.decodedData = append(dec.decodedData, decoded[:decodedLength]...) - if int(frameSize) <= len(dec.data) { - dec.data = dec.data[int(frameSize):] - } - dec.decoderLocker.Unlock() - dec.readerLocker.Unlock() - } - }() - return -} - -// Started check the record mp3 stream started ot not. -func (dec *Decoder) Started() (channel chan bool) { - channel = make(chan bool) - go func() { - for { - select { - case <-dec.context.Done(): - channel <- false - default: - } - if len(dec.decodedData) != 0 { - channel <- true - } else { - <-time.After(time.Millisecond * 100) - } - } - }() - return -} - -// Read read the raw stream -func (dec *Decoder) Read(data []byte) (n int, err error) { - for { - select { - case <-dec.context.Done(): // if the decoder is stopped, then here should return EOF - err = io.EOF - return - default: - } - if len(dec.data) == 0 && len(dec.decodedData) == 0 && dec.originalEof { - err = io.EOF - return - } else if len(dec.decodedData) > 0 { - break - } - <-time.After(WaitForDataDuration) - } - dec.decoderLocker.Lock() - defer dec.decoderLocker.Unlock() - n = copy(data, dec.decodedData[:]) - dec.decodedData = dec.decodedData[n:] - return -} - -// Close stop the decode mp3 stream cycle. -func (dec *Decoder) Close() { - if dec.contextCancel != nil { - dec.contextCancel() - } -} - -// DecodeFull put all of the mp3 data to decode. -func DecodeFull(mp3 []byte) (dec *Decoder, decodedData []byte, err error) { - dec = new(Decoder) - dec.decode = C.mp3dec_t{} - C.mp3dec_init(&dec.decode) - info := C.mp3dec_frame_info_t{} - var length = C.int(len(mp3)) - for { - var decoded = [maxSamplesPerFrame * 2]byte{} - var decodedLength = C.int(0) - frameSize := C.decode(&dec.decode, - &info, (*C.uchar)(unsafe.Pointer(&mp3[0])), - &length, (*C.uchar)(unsafe.Pointer(&decoded[0])), - &decodedLength) - if int(frameSize) == 0 { - break - } - decodedData = append(decodedData, decoded[:decodedLength]...) - if int(frameSize) < len(mp3) { - mp3 = mp3[int(frameSize):] - } - dec.SampleRate = int(info.hz) - dec.Channels = int(info.channels) - dec.Kbps = int(info.bitrate_kbps) - dec.Layer = int(info.layer) - } - return -} diff --git a/internal/minimp3/minimp3.h b/internal/minimp3/minimp3.h deleted file mode 100644 index 943f22e..0000000 --- a/internal/minimp3/minimp3.h +++ /dev/null @@ -1,1855 +0,0 @@ -#ifndef MINIMP3_H -#define MINIMP3_H -/* - https://github.com/lieff/minimp3 - To the extent possible under law, the author(s) have dedicated all copyright and related and neighboring rights to this software to the public domain worldwide. - This software is distributed without any warranty. - See . -*/ -#include - -#define MINIMP3_MAX_SAMPLES_PER_FRAME (1152*2) - -typedef struct -{ - int frame_bytes, frame_offset, channels, hz, layer, bitrate_kbps; -} mp3dec_frame_info_t; - -typedef struct -{ - float mdct_overlap[2][9*32], qmf_state[15*2*32]; - int reserv, free_format_bytes; - unsigned char header[4], reserv_buf[511]; -} mp3dec_t; - -#ifdef __cplusplus -extern "C" { -#endif /* __cplusplus */ - -void mp3dec_init(mp3dec_t *dec); -#ifndef MINIMP3_FLOAT_OUTPUT -typedef int16_t mp3d_sample_t; -#else /* MINIMP3_FLOAT_OUTPUT */ -typedef float mp3d_sample_t; -void mp3dec_f32_to_s16(const float *in, int16_t *out, int num_samples); -#endif /* MINIMP3_FLOAT_OUTPUT */ -int mp3dec_decode_frame(mp3dec_t *dec, const uint8_t *mp3, int mp3_bytes, mp3d_sample_t *pcm, mp3dec_frame_info_t *info); - -#ifdef __cplusplus -} -#endif /* __cplusplus */ - -#endif /* MINIMP3_H */ -#if defined(MINIMP3_IMPLEMENTATION) && !defined(_MINIMP3_IMPLEMENTATION_GUARD) -#define _MINIMP3_IMPLEMENTATION_GUARD - -#include -#include - -#define MAX_FREE_FORMAT_FRAME_SIZE 2304 /* more than ISO spec's */ -#ifndef MAX_FRAME_SYNC_MATCHES -#define MAX_FRAME_SYNC_MATCHES 10 -#endif /* MAX_FRAME_SYNC_MATCHES */ - -#define MAX_L3_FRAME_PAYLOAD_BYTES MAX_FREE_FORMAT_FRAME_SIZE /* MUST be >= 320000/8/32000*1152 = 1440 */ - -#define MAX_BITRESERVOIR_BYTES 511 -#define SHORT_BLOCK_TYPE 2 -#define STOP_BLOCK_TYPE 3 -#define MODE_MONO 3 -#define MODE_JOINT_STEREO 1 -#define HDR_SIZE 4 -#define HDR_IS_MONO(h) (((h[3]) & 0xC0) == 0xC0) -#define HDR_IS_MS_STEREO(h) (((h[3]) & 0xE0) == 0x60) -#define HDR_IS_FREE_FORMAT(h) (((h[2]) & 0xF0) == 0) -#define HDR_IS_CRC(h) (!((h[1]) & 1)) -#define HDR_TEST_PADDING(h) ((h[2]) & 0x2) -#define HDR_TEST_MPEG1(h) ((h[1]) & 0x8) -#define HDR_TEST_NOT_MPEG25(h) ((h[1]) & 0x10) -#define HDR_TEST_I_STEREO(h) ((h[3]) & 0x10) -#define HDR_TEST_MS_STEREO(h) ((h[3]) & 0x20) -#define HDR_GET_STEREO_MODE(h) (((h[3]) >> 6) & 3) -#define HDR_GET_STEREO_MODE_EXT(h) (((h[3]) >> 4) & 3) -#define HDR_GET_LAYER(h) (((h[1]) >> 1) & 3) -#define HDR_GET_BITRATE(h) ((h[2]) >> 4) -#define HDR_GET_SAMPLE_RATE(h) (((h[2]) >> 2) & 3) -#define HDR_GET_MY_SAMPLE_RATE(h) (HDR_GET_SAMPLE_RATE(h) + (((h[1] >> 3) & 1) + ((h[1] >> 4) & 1))*3) -#define HDR_IS_FRAME_576(h) ((h[1] & 14) == 2) -#define HDR_IS_LAYER_1(h) ((h[1] & 6) == 6) - -#define BITS_DEQUANTIZER_OUT -1 -#define MAX_SCF (255 + BITS_DEQUANTIZER_OUT*4 - 210) -#define MAX_SCFI ((MAX_SCF + 3) & ~3) - -#define MINIMP3_MIN(a, b) ((a) > (b) ? (b) : (a)) -#define MINIMP3_MAX(a, b) ((a) < (b) ? (b) : (a)) - -#if !defined(MINIMP3_NO_SIMD) - -#if !defined(MINIMP3_ONLY_SIMD) && (defined(_M_X64) || defined(__x86_64__) || defined(__aarch64__) || defined(_M_ARM64)) -/* x64 always have SSE2, arm64 always have neon, no need for generic code */ -#define MINIMP3_ONLY_SIMD -#endif /* SIMD checks... */ - -#if (defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))) || ((defined(__i386__) || defined(__x86_64__)) && defined(__SSE2__)) -#if defined(_MSC_VER) -#include -#endif /* defined(_MSC_VER) */ -#include -#define HAVE_SSE 1 -#define HAVE_SIMD 1 -#define VSTORE _mm_storeu_ps -#define VLD _mm_loadu_ps -#define VSET _mm_set1_ps -#define VADD _mm_add_ps -#define VSUB _mm_sub_ps -#define VMUL _mm_mul_ps -#define VMAC(a, x, y) _mm_add_ps(a, _mm_mul_ps(x, y)) -#define VMSB(a, x, y) _mm_sub_ps(a, _mm_mul_ps(x, y)) -#define VMUL_S(x, s) _mm_mul_ps(x, _mm_set1_ps(s)) -#define VREV(x) _mm_shuffle_ps(x, x, _MM_SHUFFLE(0, 1, 2, 3)) -typedef __m128 f4; -#if defined(_MSC_VER) || defined(MINIMP3_ONLY_SIMD) -#define minimp3_cpuid __cpuid -#else /* defined(_MSC_VER) || defined(MINIMP3_ONLY_SIMD) */ -static __inline__ __attribute__((always_inline)) void minimp3_cpuid(int CPUInfo[], const int InfoType) -{ -#if defined(__PIC__) - __asm__ __volatile__( -#if defined(__x86_64__) - "push %%rbx\n" - "cpuid\n" - "xchgl %%ebx, %1\n" - "pop %%rbx\n" -#else /* defined(__x86_64__) */ - "xchgl %%ebx, %1\n" - "cpuid\n" - "xchgl %%ebx, %1\n" -#endif /* defined(__x86_64__) */ - : "=a" (CPUInfo[0]), "=r" (CPUInfo[1]), "=c" (CPUInfo[2]), "=d" (CPUInfo[3]) - : "a" (InfoType)); -#else /* defined(__PIC__) */ - __asm__ __volatile__( - "cpuid" - : "=a" (CPUInfo[0]), "=b" (CPUInfo[1]), "=c" (CPUInfo[2]), "=d" (CPUInfo[3]) - : "a" (InfoType)); -#endif /* defined(__PIC__)*/ -} -#endif /* defined(_MSC_VER) || defined(MINIMP3_ONLY_SIMD) */ -static int have_simd(void) -{ -#ifdef MINIMP3_ONLY_SIMD - return 1; -#else /* MINIMP3_ONLY_SIMD */ - static int g_have_simd; - int CPUInfo[4]; -#ifdef MINIMP3_TEST - static int g_counter; - if (g_counter++ > 100) - return 0; -#endif /* MINIMP3_TEST */ - if (g_have_simd) - goto end; - minimp3_cpuid(CPUInfo, 0); - g_have_simd = 1; - if (CPUInfo[0] > 0) - { - minimp3_cpuid(CPUInfo, 1); - g_have_simd = (CPUInfo[3] & (1 << 26)) + 1; /* SSE2 */ - } -end: - return g_have_simd - 1; -#endif /* MINIMP3_ONLY_SIMD */ -} -#elif defined(__ARM_NEON) || defined(__aarch64__) || defined(_M_ARM64) -#include -#define HAVE_SSE 0 -#define HAVE_SIMD 1 -#define VSTORE vst1q_f32 -#define VLD vld1q_f32 -#define VSET vmovq_n_f32 -#define VADD vaddq_f32 -#define VSUB vsubq_f32 -#define VMUL vmulq_f32 -#define VMAC(a, x, y) vmlaq_f32(a, x, y) -#define VMSB(a, x, y) vmlsq_f32(a, x, y) -#define VMUL_S(x, s) vmulq_f32(x, vmovq_n_f32(s)) -#define VREV(x) vcombine_f32(vget_high_f32(vrev64q_f32(x)), vget_low_f32(vrev64q_f32(x))) -typedef float32x4_t f4; -static int have_simd() -{ /* TODO: detect neon for !MINIMP3_ONLY_SIMD */ - return 1; -} -#else /* SIMD checks... */ -#define HAVE_SSE 0 -#define HAVE_SIMD 0 -#ifdef MINIMP3_ONLY_SIMD -#error MINIMP3_ONLY_SIMD used, but SSE/NEON not enabled -#endif /* MINIMP3_ONLY_SIMD */ -#endif /* SIMD checks... */ -#else /* !defined(MINIMP3_NO_SIMD) */ -#define HAVE_SIMD 0 -#endif /* !defined(MINIMP3_NO_SIMD) */ - -#if defined(__ARM_ARCH) && (__ARM_ARCH >= 6) && !defined(__aarch64__) && !defined(_M_ARM64) -#define HAVE_ARMV6 1 -static __inline__ __attribute__((always_inline)) int32_t minimp3_clip_int16_arm(int32_t a) -{ - int32_t x = 0; - __asm__ ("ssat %0, #16, %1" : "=r"(x) : "r"(a)); - return x; -} -#else -#define HAVE_ARMV6 0 -#endif - -typedef struct -{ - const uint8_t *buf; - int pos, limit; -} bs_t; - -typedef struct -{ - float scf[3*64]; - uint8_t total_bands, stereo_bands, bitalloc[64], scfcod[64]; -} L12_scale_info; - -typedef struct -{ - uint8_t tab_offset, code_tab_width, band_count; -} L12_subband_alloc_t; - -typedef struct -{ - const uint8_t *sfbtab; - uint16_t part_23_length, big_values, scalefac_compress; - uint8_t global_gain, block_type, mixed_block_flag, n_long_sfb, n_short_sfb; - uint8_t table_select[3], region_count[3], subblock_gain[3]; - uint8_t preflag, scalefac_scale, count1_table, scfsi; -} L3_gr_info_t; - -typedef struct -{ - bs_t bs; - uint8_t maindata[MAX_BITRESERVOIR_BYTES + MAX_L3_FRAME_PAYLOAD_BYTES]; - L3_gr_info_t gr_info[4]; - float grbuf[2][576], scf[40], syn[18 + 15][2*32]; - uint8_t ist_pos[2][39]; -} mp3dec_scratch_t; - -static void bs_init(bs_t *bs, const uint8_t *data, int bytes) -{ - bs->buf = data; - bs->pos = 0; - bs->limit = bytes*8; -} - -static uint32_t get_bits(bs_t *bs, int n) -{ - uint32_t next, cache = 0, s = bs->pos & 7; - int shl = n + s; - const uint8_t *p = bs->buf + (bs->pos >> 3); - if ((bs->pos += n) > bs->limit) - return 0; - next = *p++ & (255 >> s); - while ((shl -= 8) > 0) - { - cache |= next << shl; - next = *p++; - } - return cache | (next >> -shl); -} - -static int hdr_valid(const uint8_t *h) -{ - return h[0] == 0xff && - ((h[1] & 0xF0) == 0xf0 || (h[1] & 0xFE) == 0xe2) && - (HDR_GET_LAYER(h) != 0) && - (HDR_GET_BITRATE(h) != 15) && - (HDR_GET_SAMPLE_RATE(h) != 3); -} - -static int hdr_compare(const uint8_t *h1, const uint8_t *h2) -{ - return hdr_valid(h2) && - ((h1[1] ^ h2[1]) & 0xFE) == 0 && - ((h1[2] ^ h2[2]) & 0x0C) == 0 && - !(HDR_IS_FREE_FORMAT(h1) ^ HDR_IS_FREE_FORMAT(h2)); -} - -static unsigned hdr_bitrate_kbps(const uint8_t *h) -{ - static const uint8_t halfrate[2][3][15] = { - { { 0,4,8,12,16,20,24,28,32,40,48,56,64,72,80 }, { 0,4,8,12,16,20,24,28,32,40,48,56,64,72,80 }, { 0,16,24,28,32,40,48,56,64,72,80,88,96,112,128 } }, - { { 0,16,20,24,28,32,40,48,56,64,80,96,112,128,160 }, { 0,16,24,28,32,40,48,56,64,80,96,112,128,160,192 }, { 0,16,32,48,64,80,96,112,128,144,160,176,192,208,224 } }, - }; - return 2*halfrate[!!HDR_TEST_MPEG1(h)][HDR_GET_LAYER(h) - 1][HDR_GET_BITRATE(h)]; -} - -static unsigned hdr_sample_rate_hz(const uint8_t *h) -{ - static const unsigned g_hz[3] = { 44100, 48000, 32000 }; - return g_hz[HDR_GET_SAMPLE_RATE(h)] >> (int)!HDR_TEST_MPEG1(h) >> (int)!HDR_TEST_NOT_MPEG25(h); -} - -static unsigned hdr_frame_samples(const uint8_t *h) -{ - return HDR_IS_LAYER_1(h) ? 384 : (1152 >> (int)HDR_IS_FRAME_576(h)); -} - -static int hdr_frame_bytes(const uint8_t *h, int free_format_size) -{ - int frame_bytes = hdr_frame_samples(h)*hdr_bitrate_kbps(h)*125/hdr_sample_rate_hz(h); - if (HDR_IS_LAYER_1(h)) - { - frame_bytes &= ~3; /* slot align */ - } - return frame_bytes ? frame_bytes : free_format_size; -} - -static int hdr_padding(const uint8_t *h) -{ - return HDR_TEST_PADDING(h) ? (HDR_IS_LAYER_1(h) ? 4 : 1) : 0; -} - -#ifndef MINIMP3_ONLY_MP3 -static const L12_subband_alloc_t *L12_subband_alloc_table(const uint8_t *hdr, L12_scale_info *sci) -{ - const L12_subband_alloc_t *alloc; - int mode = HDR_GET_STEREO_MODE(hdr); - int nbands, stereo_bands = (mode == MODE_MONO) ? 0 : (mode == MODE_JOINT_STEREO) ? (HDR_GET_STEREO_MODE_EXT(hdr) << 2) + 4 : 32; - - if (HDR_IS_LAYER_1(hdr)) - { - static const L12_subband_alloc_t g_alloc_L1[] = { { 76, 4, 32 } }; - alloc = g_alloc_L1; - nbands = 32; - } else if (!HDR_TEST_MPEG1(hdr)) - { - static const L12_subband_alloc_t g_alloc_L2M2[] = { { 60, 4, 4 }, { 44, 3, 7 }, { 44, 2, 19 } }; - alloc = g_alloc_L2M2; - nbands = 30; - } else - { - static const L12_subband_alloc_t g_alloc_L2M1[] = { { 0, 4, 3 }, { 16, 4, 8 }, { 32, 3, 12 }, { 40, 2, 7 } }; - int sample_rate_idx = HDR_GET_SAMPLE_RATE(hdr); - unsigned kbps = hdr_bitrate_kbps(hdr) >> (int)(mode != MODE_MONO); - if (!kbps) /* free-format */ - { - kbps = 192; - } - - alloc = g_alloc_L2M1; - nbands = 27; - if (kbps < 56) - { - static const L12_subband_alloc_t g_alloc_L2M1_lowrate[] = { { 44, 4, 2 }, { 44, 3, 10 } }; - alloc = g_alloc_L2M1_lowrate; - nbands = sample_rate_idx == 2 ? 12 : 8; - } else if (kbps >= 96 && sample_rate_idx != 1) - { - nbands = 30; - } - } - - sci->total_bands = (uint8_t)nbands; - sci->stereo_bands = (uint8_t)MINIMP3_MIN(stereo_bands, nbands); - - return alloc; -} - -static void L12_read_scalefactors(bs_t *bs, uint8_t *pba, uint8_t *scfcod, int bands, float *scf) -{ - static const float g_deq_L12[18*3] = { -#define DQ(x) 9.53674316e-07f/x, 7.56931807e-07f/x, 6.00777173e-07f/x - DQ(3),DQ(7),DQ(15),DQ(31),DQ(63),DQ(127),DQ(255),DQ(511),DQ(1023),DQ(2047),DQ(4095),DQ(8191),DQ(16383),DQ(32767),DQ(65535),DQ(3),DQ(5),DQ(9) - }; - int i, m; - for (i = 0; i < bands; i++) - { - float s = 0; - int ba = *pba++; - int mask = ba ? 4 + ((19 >> scfcod[i]) & 3) : 0; - for (m = 4; m; m >>= 1) - { - if (mask & m) - { - int b = get_bits(bs, 6); - s = g_deq_L12[ba*3 - 6 + b % 3]*(1 << 21 >> b/3); - } - *scf++ = s; - } - } -} - -static void L12_read_scale_info(const uint8_t *hdr, bs_t *bs, L12_scale_info *sci) -{ - static const uint8_t g_bitalloc_code_tab[] = { - 0,17, 3, 4, 5,6,7, 8,9,10,11,12,13,14,15,16, - 0,17,18, 3,19,4,5, 6,7, 8, 9,10,11,12,13,16, - 0,17,18, 3,19,4,5,16, - 0,17,18,16, - 0,17,18,19, 4,5,6, 7,8, 9,10,11,12,13,14,15, - 0,17,18, 3,19,4,5, 6,7, 8, 9,10,11,12,13,14, - 0, 2, 3, 4, 5,6,7, 8,9,10,11,12,13,14,15,16 - }; - const L12_subband_alloc_t *subband_alloc = L12_subband_alloc_table(hdr, sci); - - int i, k = 0, ba_bits = 0; - const uint8_t *ba_code_tab = g_bitalloc_code_tab; - - for (i = 0; i < sci->total_bands; i++) - { - uint8_t ba; - if (i == k) - { - k += subband_alloc->band_count; - ba_bits = subband_alloc->code_tab_width; - ba_code_tab = g_bitalloc_code_tab + subband_alloc->tab_offset; - subband_alloc++; - } - ba = ba_code_tab[get_bits(bs, ba_bits)]; - sci->bitalloc[2*i] = ba; - if (i < sci->stereo_bands) - { - ba = ba_code_tab[get_bits(bs, ba_bits)]; - } - sci->bitalloc[2*i + 1] = sci->stereo_bands ? ba : 0; - } - - for (i = 0; i < 2*sci->total_bands; i++) - { - sci->scfcod[i] = sci->bitalloc[i] ? HDR_IS_LAYER_1(hdr) ? 2 : get_bits(bs, 2) : 6; - } - - L12_read_scalefactors(bs, sci->bitalloc, sci->scfcod, sci->total_bands*2, sci->scf); - - for (i = sci->stereo_bands; i < sci->total_bands; i++) - { - sci->bitalloc[2*i + 1] = 0; - } -} - -static int L12_dequantize_granule(float *grbuf, bs_t *bs, L12_scale_info *sci, int group_size) -{ - int i, j, k, choff = 576; - for (j = 0; j < 4; j++) - { - float *dst = grbuf + group_size*j; - for (i = 0; i < 2*sci->total_bands; i++) - { - int ba = sci->bitalloc[i]; - if (ba != 0) - { - if (ba < 17) - { - int half = (1 << (ba - 1)) - 1; - for (k = 0; k < group_size; k++) - { - dst[k] = (float)((int)get_bits(bs, ba) - half); - } - } else - { - unsigned mod = (2 << (ba - 17)) + 1; /* 3, 5, 9 */ - unsigned code = get_bits(bs, mod + 2 - (mod >> 3)); /* 5, 7, 10 */ - for (k = 0; k < group_size; k++, code /= mod) - { - dst[k] = (float)((int)(code % mod - mod/2)); - } - } - } - dst += choff; - choff = 18 - choff; - } - } - return group_size*4; -} - -static void L12_apply_scf_384(L12_scale_info *sci, const float *scf, float *dst) -{ - int i, k; - memcpy(dst + 576 + sci->stereo_bands*18, dst + sci->stereo_bands*18, (sci->total_bands - sci->stereo_bands)*18*sizeof(float)); - for (i = 0; i < sci->total_bands; i++, dst += 18, scf += 6) - { - for (k = 0; k < 12; k++) - { - dst[k + 0] *= scf[0]; - dst[k + 576] *= scf[3]; - } - } -} -#endif /* MINIMP3_ONLY_MP3 */ - -static int L3_read_side_info(bs_t *bs, L3_gr_info_t *gr, const uint8_t *hdr) -{ - static const uint8_t g_scf_long[8][23] = { - { 6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54,0 }, - { 12,12,12,12,12,12,16,20,24,28,32,40,48,56,64,76,90,2,2,2,2,2,0 }, - { 6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54,0 }, - { 6,6,6,6,6,6,8,10,12,14,16,18,22,26,32,38,46,54,62,70,76,36,0 }, - { 6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54,0 }, - { 4,4,4,4,4,4,6,6,8,8,10,12,16,20,24,28,34,42,50,54,76,158,0 }, - { 4,4,4,4,4,4,6,6,6,8,10,12,16,18,22,28,34,40,46,54,54,192,0 }, - { 4,4,4,4,4,4,6,6,8,10,12,16,20,24,30,38,46,56,68,84,102,26,0 } - }; - static const uint8_t g_scf_short[8][40] = { - { 4,4,4,4,4,4,4,4,4,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,24,24,24,30,30,30,40,40,40,18,18,18,0 }, - { 8,8,8,8,8,8,8,8,8,12,12,12,16,16,16,20,20,20,24,24,24,28,28,28,36,36,36,2,2,2,2,2,2,2,2,2,26,26,26,0 }, - { 4,4,4,4,4,4,4,4,4,6,6,6,6,6,6,8,8,8,10,10,10,14,14,14,18,18,18,26,26,26,32,32,32,42,42,42,18,18,18,0 }, - { 4,4,4,4,4,4,4,4,4,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,24,24,24,32,32,32,44,44,44,12,12,12,0 }, - { 4,4,4,4,4,4,4,4,4,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,24,24,24,30,30,30,40,40,40,18,18,18,0 }, - { 4,4,4,4,4,4,4,4,4,4,4,4,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,22,22,22,30,30,30,56,56,56,0 }, - { 4,4,4,4,4,4,4,4,4,4,4,4,6,6,6,6,6,6,10,10,10,12,12,12,14,14,14,16,16,16,20,20,20,26,26,26,66,66,66,0 }, - { 4,4,4,4,4,4,4,4,4,4,4,4,6,6,6,8,8,8,12,12,12,16,16,16,20,20,20,26,26,26,34,34,34,42,42,42,12,12,12,0 } - }; - static const uint8_t g_scf_mixed[8][40] = { - { 6,6,6,6,6,6,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,24,24,24,30,30,30,40,40,40,18,18,18,0 }, - { 12,12,12,4,4,4,8,8,8,12,12,12,16,16,16,20,20,20,24,24,24,28,28,28,36,36,36,2,2,2,2,2,2,2,2,2,26,26,26,0 }, - { 6,6,6,6,6,6,6,6,6,6,6,6,8,8,8,10,10,10,14,14,14,18,18,18,26,26,26,32,32,32,42,42,42,18,18,18,0 }, - { 6,6,6,6,6,6,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,24,24,24,32,32,32,44,44,44,12,12,12,0 }, - { 6,6,6,6,6,6,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,24,24,24,30,30,30,40,40,40,18,18,18,0 }, - { 4,4,4,4,4,4,6,6,4,4,4,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,22,22,22,30,30,30,56,56,56,0 }, - { 4,4,4,4,4,4,6,6,4,4,4,6,6,6,6,6,6,10,10,10,12,12,12,14,14,14,16,16,16,20,20,20,26,26,26,66,66,66,0 }, - { 4,4,4,4,4,4,6,6,4,4,4,6,6,6,8,8,8,12,12,12,16,16,16,20,20,20,26,26,26,34,34,34,42,42,42,12,12,12,0 } - }; - - unsigned tables, scfsi = 0; - int main_data_begin, part_23_sum = 0; - int sr_idx = HDR_GET_MY_SAMPLE_RATE(hdr); sr_idx -= (sr_idx != 0); - int gr_count = HDR_IS_MONO(hdr) ? 1 : 2; - - if (HDR_TEST_MPEG1(hdr)) - { - gr_count *= 2; - main_data_begin = get_bits(bs, 9); - scfsi = get_bits(bs, 7 + gr_count); - } else - { - main_data_begin = get_bits(bs, 8 + gr_count) >> gr_count; - } - - do - { - if (HDR_IS_MONO(hdr)) - { - scfsi <<= 4; - } - gr->part_23_length = (uint16_t)get_bits(bs, 12); - part_23_sum += gr->part_23_length; - gr->big_values = (uint16_t)get_bits(bs, 9); - if (gr->big_values > 288) - { - return -1; - } - gr->global_gain = (uint8_t)get_bits(bs, 8); - gr->scalefac_compress = (uint16_t)get_bits(bs, HDR_TEST_MPEG1(hdr) ? 4 : 9); - gr->sfbtab = g_scf_long[sr_idx]; - gr->n_long_sfb = 22; - gr->n_short_sfb = 0; - if (get_bits(bs, 1)) - { - gr->block_type = (uint8_t)get_bits(bs, 2); - if (!gr->block_type) - { - return -1; - } - gr->mixed_block_flag = (uint8_t)get_bits(bs, 1); - gr->region_count[0] = 7; - gr->region_count[1] = 255; - if (gr->block_type == SHORT_BLOCK_TYPE) - { - scfsi &= 0x0F0F; - if (!gr->mixed_block_flag) - { - gr->region_count[0] = 8; - gr->sfbtab = g_scf_short[sr_idx]; - gr->n_long_sfb = 0; - gr->n_short_sfb = 39; - } else - { - gr->sfbtab = g_scf_mixed[sr_idx]; - gr->n_long_sfb = HDR_TEST_MPEG1(hdr) ? 8 : 6; - gr->n_short_sfb = 30; - } - } - tables = get_bits(bs, 10); - tables <<= 5; - gr->subblock_gain[0] = (uint8_t)get_bits(bs, 3); - gr->subblock_gain[1] = (uint8_t)get_bits(bs, 3); - gr->subblock_gain[2] = (uint8_t)get_bits(bs, 3); - } else - { - gr->block_type = 0; - gr->mixed_block_flag = 0; - tables = get_bits(bs, 15); - gr->region_count[0] = (uint8_t)get_bits(bs, 4); - gr->region_count[1] = (uint8_t)get_bits(bs, 3); - gr->region_count[2] = 255; - } - gr->table_select[0] = (uint8_t)(tables >> 10); - gr->table_select[1] = (uint8_t)((tables >> 5) & 31); - gr->table_select[2] = (uint8_t)((tables) & 31); - gr->preflag = HDR_TEST_MPEG1(hdr) ? get_bits(bs, 1) : (gr->scalefac_compress >= 500); - gr->scalefac_scale = (uint8_t)get_bits(bs, 1); - gr->count1_table = (uint8_t)get_bits(bs, 1); - gr->scfsi = (uint8_t)((scfsi >> 12) & 15); - scfsi <<= 4; - gr++; - } while(--gr_count); - - if (part_23_sum + bs->pos > bs->limit + main_data_begin*8) - { - return -1; - } - - return main_data_begin; -} - -static void L3_read_scalefactors(uint8_t *scf, uint8_t *ist_pos, const uint8_t *scf_size, const uint8_t *scf_count, bs_t *bitbuf, int scfsi) -{ - int i, k; - for (i = 0; i < 4 && scf_count[i]; i++, scfsi *= 2) - { - int cnt = scf_count[i]; - if (scfsi & 8) - { - memcpy(scf, ist_pos, cnt); - } else - { - int bits = scf_size[i]; - if (!bits) - { - memset(scf, 0, cnt); - memset(ist_pos, 0, cnt); - } else - { - int max_scf = (scfsi < 0) ? (1 << bits) - 1 : -1; - for (k = 0; k < cnt; k++) - { - int s = get_bits(bitbuf, bits); - ist_pos[k] = (s == max_scf ? -1 : s); - scf[k] = s; - } - } - } - ist_pos += cnt; - scf += cnt; - } - scf[0] = scf[1] = scf[2] = 0; -} - -static float L3_ldexp_q2(float y, int exp_q2) -{ - static const float g_expfrac[4] = { 9.31322575e-10f,7.83145814e-10f,6.58544508e-10f,5.53767716e-10f }; - int e; - do - { - e = MINIMP3_MIN(30*4, exp_q2); - y *= g_expfrac[e & 3]*(1 << 30 >> (e >> 2)); - } while ((exp_q2 -= e) > 0); - return y; -} - -static void L3_decode_scalefactors(const uint8_t *hdr, uint8_t *ist_pos, bs_t *bs, const L3_gr_info_t *gr, float *scf, int ch) -{ - static const uint8_t g_scf_partitions[3][28] = { - { 6,5,5, 5,6,5,5,5,6,5, 7,3,11,10,0,0, 7, 7, 7,0, 6, 6,6,3, 8, 8,5,0 }, - { 8,9,6,12,6,9,9,9,6,9,12,6,15,18,0,0, 6,15,12,0, 6,12,9,6, 6,18,9,0 }, - { 9,9,6,12,9,9,9,9,9,9,12,6,18,18,0,0,12,12,12,0,12, 9,9,6,15,12,9,0 } - }; - const uint8_t *scf_partition = g_scf_partitions[!!gr->n_short_sfb + !gr->n_long_sfb]; - uint8_t scf_size[4], iscf[40]; - int i, scf_shift = gr->scalefac_scale + 1, gain_exp, scfsi = gr->scfsi; - float gain; - - if (HDR_TEST_MPEG1(hdr)) - { - static const uint8_t g_scfc_decode[16] = { 0,1,2,3, 12,5,6,7, 9,10,11,13, 14,15,18,19 }; - int part = g_scfc_decode[gr->scalefac_compress]; - scf_size[1] = scf_size[0] = (uint8_t)(part >> 2); - scf_size[3] = scf_size[2] = (uint8_t)(part & 3); - } else - { - static const uint8_t g_mod[6*4] = { 5,5,4,4,5,5,4,1,4,3,1,1,5,6,6,1,4,4,4,1,4,3,1,1 }; - int k, modprod, sfc, ist = HDR_TEST_I_STEREO(hdr) && ch; - sfc = gr->scalefac_compress >> ist; - for (k = ist*3*4; sfc >= 0; sfc -= modprod, k += 4) - { - for (modprod = 1, i = 3; i >= 0; i--) - { - scf_size[i] = (uint8_t)(sfc / modprod % g_mod[k + i]); - modprod *= g_mod[k + i]; - } - } - scf_partition += k; - scfsi = -16; - } - L3_read_scalefactors(iscf, ist_pos, scf_size, scf_partition, bs, scfsi); - - if (gr->n_short_sfb) - { - int sh = 3 - scf_shift; - for (i = 0; i < gr->n_short_sfb; i += 3) - { - iscf[gr->n_long_sfb + i + 0] += gr->subblock_gain[0] << sh; - iscf[gr->n_long_sfb + i + 1] += gr->subblock_gain[1] << sh; - iscf[gr->n_long_sfb + i + 2] += gr->subblock_gain[2] << sh; - } - } else if (gr->preflag) - { - static const uint8_t g_preamp[10] = { 1,1,1,1,2,2,3,3,3,2 }; - for (i = 0; i < 10; i++) - { - iscf[11 + i] += g_preamp[i]; - } - } - - gain_exp = gr->global_gain + BITS_DEQUANTIZER_OUT*4 - 210 - (HDR_IS_MS_STEREO(hdr) ? 2 : 0); - gain = L3_ldexp_q2(1 << (MAX_SCFI/4), MAX_SCFI - gain_exp); - for (i = 0; i < (int)(gr->n_long_sfb + gr->n_short_sfb); i++) - { - scf[i] = L3_ldexp_q2(gain, iscf[i] << scf_shift); - } -} - -static const float g_pow43[129 + 16] = { - 0,-1,-2.519842f,-4.326749f,-6.349604f,-8.549880f,-10.902724f,-13.390518f,-16.000000f,-18.720754f,-21.544347f,-24.463781f,-27.473142f,-30.567351f,-33.741992f,-36.993181f, - 0,1,2.519842f,4.326749f,6.349604f,8.549880f,10.902724f,13.390518f,16.000000f,18.720754f,21.544347f,24.463781f,27.473142f,30.567351f,33.741992f,36.993181f,40.317474f,43.711787f,47.173345f,50.699631f,54.288352f,57.937408f,61.644865f,65.408941f,69.227979f,73.100443f,77.024898f,81.000000f,85.024491f,89.097188f,93.216975f,97.382800f,101.593667f,105.848633f,110.146801f,114.487321f,118.869381f,123.292209f,127.755065f,132.257246f,136.798076f,141.376907f,145.993119f,150.646117f,155.335327f,160.060199f,164.820202f,169.614826f,174.443577f,179.305980f,184.201575f,189.129918f,194.090580f,199.083145f,204.107210f,209.162385f,214.248292f,219.364564f,224.510845f,229.686789f,234.892058f,240.126328f,245.389280f,250.680604f,256.000000f,261.347174f,266.721841f,272.123723f,277.552547f,283.008049f,288.489971f,293.998060f,299.532071f,305.091761f,310.676898f,316.287249f,321.922592f,327.582707f,333.267377f,338.976394f,344.709550f,350.466646f,356.247482f,362.051866f,367.879608f,373.730522f,379.604427f,385.501143f,391.420496f,397.362314f,403.326427f,409.312672f,415.320884f,421.350905f,427.402579f,433.475750f,439.570269f,445.685987f,451.822757f,457.980436f,464.158883f,470.357960f,476.577530f,482.817459f,489.077615f,495.357868f,501.658090f,507.978156f,514.317941f,520.677324f,527.056184f,533.454404f,539.871867f,546.308458f,552.764065f,559.238575f,565.731879f,572.243870f,578.774440f,585.323483f,591.890898f,598.476581f,605.080431f,611.702349f,618.342238f,625.000000f,631.675540f,638.368763f,645.079578f -}; - -static float L3_pow_43(int x) -{ - float frac; - int sign, mult = 256; - - if (x < 129) - { - return g_pow43[16 + x]; - } - - if (x < 1024) - { - mult = 16; - x <<= 3; - } - - sign = 2*x & 64; - frac = (float)((x & 63) - sign) / ((x & ~63) + sign); - return g_pow43[16 + ((x + sign) >> 6)]*(1.f + frac*((4.f/3) + frac*(2.f/9)))*mult; -} - -static void L3_huffman(float *dst, bs_t *bs, const L3_gr_info_t *gr_info, const float *scf, int layer3gr_limit) -{ - static const int16_t tabs[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 785,785,785,785,784,784,784,784,513,513,513,513,513,513,513,513,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256, - -255,1313,1298,1282,785,785,785,785,784,784,784,784,769,769,769,769,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,290,288, - -255,1313,1298,1282,769,769,769,769,529,529,529,529,529,529,529,529,528,528,528,528,528,528,528,528,512,512,512,512,512,512,512,512,290,288, - -253,-318,-351,-367,785,785,785,785,784,784,784,784,769,769,769,769,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,819,818,547,547,275,275,275,275,561,560,515,546,289,274,288,258, - -254,-287,1329,1299,1314,1312,1057,1057,1042,1042,1026,1026,784,784,784,784,529,529,529,529,529,529,529,529,769,769,769,769,768,768,768,768,563,560,306,306,291,259, - -252,-413,-477,-542,1298,-575,1041,1041,784,784,784,784,769,769,769,769,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,-383,-399,1107,1092,1106,1061,849,849,789,789,1104,1091,773,773,1076,1075,341,340,325,309,834,804,577,577,532,532,516,516,832,818,803,816,561,561,531,531,515,546,289,289,288,258, - -252,-429,-493,-559,1057,1057,1042,1042,529,529,529,529,529,529,529,529,784,784,784,784,769,769,769,769,512,512,512,512,512,512,512,512,-382,1077,-415,1106,1061,1104,849,849,789,789,1091,1076,1029,1075,834,834,597,581,340,340,339,324,804,833,532,532,832,772,818,803,817,787,816,771,290,290,290,290,288,258, - -253,-349,-414,-447,-463,1329,1299,-479,1314,1312,1057,1057,1042,1042,1026,1026,785,785,785,785,784,784,784,784,769,769,769,769,768,768,768,768,-319,851,821,-335,836,850,805,849,341,340,325,336,533,533,579,579,564,564,773,832,578,548,563,516,321,276,306,291,304,259, - -251,-572,-733,-830,-863,-879,1041,1041,784,784,784,784,769,769,769,769,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,-511,-527,-543,1396,1351,1381,1366,1395,1335,1380,-559,1334,1138,1138,1063,1063,1350,1392,1031,1031,1062,1062,1364,1363,1120,1120,1333,1348,881,881,881,881,375,374,359,373,343,358,341,325,791,791,1123,1122,-703,1105,1045,-719,865,865,790,790,774,774,1104,1029,338,293,323,308,-799,-815,833,788,772,818,803,816,322,292,307,320,561,531,515,546,289,274,288,258, - -251,-525,-605,-685,-765,-831,-846,1298,1057,1057,1312,1282,785,785,785,785,784,784,784,784,769,769,769,769,512,512,512,512,512,512,512,512,1399,1398,1383,1367,1382,1396,1351,-511,1381,1366,1139,1139,1079,1079,1124,1124,1364,1349,1363,1333,882,882,882,882,807,807,807,807,1094,1094,1136,1136,373,341,535,535,881,775,867,822,774,-591,324,338,-671,849,550,550,866,864,609,609,293,336,534,534,789,835,773,-751,834,804,308,307,833,788,832,772,562,562,547,547,305,275,560,515,290,290, - -252,-397,-477,-557,-622,-653,-719,-735,-750,1329,1299,1314,1057,1057,1042,1042,1312,1282,1024,1024,785,785,785,785,784,784,784,784,769,769,769,769,-383,1127,1141,1111,1126,1140,1095,1110,869,869,883,883,1079,1109,882,882,375,374,807,868,838,881,791,-463,867,822,368,263,852,837,836,-543,610,610,550,550,352,336,534,534,865,774,851,821,850,805,593,533,579,564,773,832,578,578,548,548,577,577,307,276,306,291,516,560,259,259, - -250,-2107,-2507,-2764,-2909,-2974,-3007,-3023,1041,1041,1040,1040,769,769,769,769,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,-767,-1052,-1213,-1277,-1358,-1405,-1469,-1535,-1550,-1582,-1614,-1647,-1662,-1694,-1726,-1759,-1774,-1807,-1822,-1854,-1886,1565,-1919,-1935,-1951,-1967,1731,1730,1580,1717,-1983,1729,1564,-1999,1548,-2015,-2031,1715,1595,-2047,1714,-2063,1610,-2079,1609,-2095,1323,1323,1457,1457,1307,1307,1712,1547,1641,1700,1699,1594,1685,1625,1442,1442,1322,1322,-780,-973,-910,1279,1278,1277,1262,1276,1261,1275,1215,1260,1229,-959,974,974,989,989,-943,735,478,478,495,463,506,414,-1039,1003,958,1017,927,942,987,957,431,476,1272,1167,1228,-1183,1256,-1199,895,895,941,941,1242,1227,1212,1135,1014,1014,490,489,503,487,910,1013,985,925,863,894,970,955,1012,847,-1343,831,755,755,984,909,428,366,754,559,-1391,752,486,457,924,997,698,698,983,893,740,740,908,877,739,739,667,667,953,938,497,287,271,271,683,606,590,712,726,574,302,302,738,736,481,286,526,725,605,711,636,724,696,651,589,681,666,710,364,467,573,695,466,466,301,465,379,379,709,604,665,679,316,316,634,633,436,436,464,269,424,394,452,332,438,363,347,408,393,448,331,422,362,407,392,421,346,406,391,376,375,359,1441,1306,-2367,1290,-2383,1337,-2399,-2415,1426,1321,-2431,1411,1336,-2447,-2463,-2479,1169,1169,1049,1049,1424,1289,1412,1352,1319,-2495,1154,1154,1064,1064,1153,1153,416,390,360,404,403,389,344,374,373,343,358,372,327,357,342,311,356,326,1395,1394,1137,1137,1047,1047,1365,1392,1287,1379,1334,1364,1349,1378,1318,1363,792,792,792,792,1152,1152,1032,1032,1121,1121,1046,1046,1120,1120,1030,1030,-2895,1106,1061,1104,849,849,789,789,1091,1076,1029,1090,1060,1075,833,833,309,324,532,532,832,772,818,803,561,561,531,560,515,546,289,274,288,258, - -250,-1179,-1579,-1836,-1996,-2124,-2253,-2333,-2413,-2477,-2542,-2574,-2607,-2622,-2655,1314,1313,1298,1312,1282,785,785,785,785,1040,1040,1025,1025,768,768,768,768,-766,-798,-830,-862,-895,-911,-927,-943,-959,-975,-991,-1007,-1023,-1039,-1055,-1070,1724,1647,-1103,-1119,1631,1767,1662,1738,1708,1723,-1135,1780,1615,1779,1599,1677,1646,1778,1583,-1151,1777,1567,1737,1692,1765,1722,1707,1630,1751,1661,1764,1614,1736,1676,1763,1750,1645,1598,1721,1691,1762,1706,1582,1761,1566,-1167,1749,1629,767,766,751,765,494,494,735,764,719,749,734,763,447,447,748,718,477,506,431,491,446,476,461,505,415,430,475,445,504,399,460,489,414,503,383,474,429,459,502,502,746,752,488,398,501,473,413,472,486,271,480,270,-1439,-1455,1357,-1471,-1487,-1503,1341,1325,-1519,1489,1463,1403,1309,-1535,1372,1448,1418,1476,1356,1462,1387,-1551,1475,1340,1447,1402,1386,-1567,1068,1068,1474,1461,455,380,468,440,395,425,410,454,364,467,466,464,453,269,409,448,268,432,1371,1473,1432,1417,1308,1460,1355,1446,1459,1431,1083,1083,1401,1416,1458,1445,1067,1067,1370,1457,1051,1051,1291,1430,1385,1444,1354,1415,1400,1443,1082,1082,1173,1113,1186,1066,1185,1050,-1967,1158,1128,1172,1097,1171,1081,-1983,1157,1112,416,266,375,400,1170,1142,1127,1065,793,793,1169,1033,1156,1096,1141,1111,1155,1080,1126,1140,898,898,808,808,897,897,792,792,1095,1152,1032,1125,1110,1139,1079,1124,882,807,838,881,853,791,-2319,867,368,263,822,852,837,866,806,865,-2399,851,352,262,534,534,821,836,594,594,549,549,593,593,533,533,848,773,579,579,564,578,548,563,276,276,577,576,306,291,516,560,305,305,275,259, - -251,-892,-2058,-2620,-2828,-2957,-3023,-3039,1041,1041,1040,1040,769,769,769,769,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,-511,-527,-543,-559,1530,-575,-591,1528,1527,1407,1526,1391,1023,1023,1023,1023,1525,1375,1268,1268,1103,1103,1087,1087,1039,1039,1523,-604,815,815,815,815,510,495,509,479,508,463,507,447,431,505,415,399,-734,-782,1262,-815,1259,1244,-831,1258,1228,-847,-863,1196,-879,1253,987,987,748,-767,493,493,462,477,414,414,686,669,478,446,461,445,474,429,487,458,412,471,1266,1264,1009,1009,799,799,-1019,-1276,-1452,-1581,-1677,-1757,-1821,-1886,-1933,-1997,1257,1257,1483,1468,1512,1422,1497,1406,1467,1496,1421,1510,1134,1134,1225,1225,1466,1451,1374,1405,1252,1252,1358,1480,1164,1164,1251,1251,1238,1238,1389,1465,-1407,1054,1101,-1423,1207,-1439,830,830,1248,1038,1237,1117,1223,1148,1236,1208,411,426,395,410,379,269,1193,1222,1132,1235,1221,1116,976,976,1192,1162,1177,1220,1131,1191,963,963,-1647,961,780,-1663,558,558,994,993,437,408,393,407,829,978,813,797,947,-1743,721,721,377,392,844,950,828,890,706,706,812,859,796,960,948,843,934,874,571,571,-1919,690,555,689,421,346,539,539,944,779,918,873,932,842,903,888,570,570,931,917,674,674,-2575,1562,-2591,1609,-2607,1654,1322,1322,1441,1441,1696,1546,1683,1593,1669,1624,1426,1426,1321,1321,1639,1680,1425,1425,1305,1305,1545,1668,1608,1623,1667,1592,1638,1666,1320,1320,1652,1607,1409,1409,1304,1304,1288,1288,1664,1637,1395,1395,1335,1335,1622,1636,1394,1394,1319,1319,1606,1621,1392,1392,1137,1137,1137,1137,345,390,360,375,404,373,1047,-2751,-2767,-2783,1062,1121,1046,-2799,1077,-2815,1106,1061,789,789,1105,1104,263,355,310,340,325,354,352,262,339,324,1091,1076,1029,1090,1060,1075,833,833,788,788,1088,1028,818,818,803,803,561,561,531,531,816,771,546,546,289,274,288,258, - -253,-317,-381,-446,-478,-509,1279,1279,-811,-1179,-1451,-1756,-1900,-2028,-2189,-2253,-2333,-2414,-2445,-2511,-2526,1313,1298,-2559,1041,1041,1040,1040,1025,1025,1024,1024,1022,1007,1021,991,1020,975,1019,959,687,687,1018,1017,671,671,655,655,1016,1015,639,639,758,758,623,623,757,607,756,591,755,575,754,559,543,543,1009,783,-575,-621,-685,-749,496,-590,750,749,734,748,974,989,1003,958,988,973,1002,942,987,957,972,1001,926,986,941,971,956,1000,910,985,925,999,894,970,-1071,-1087,-1102,1390,-1135,1436,1509,1451,1374,-1151,1405,1358,1480,1420,-1167,1507,1494,1389,1342,1465,1435,1450,1326,1505,1310,1493,1373,1479,1404,1492,1464,1419,428,443,472,397,736,526,464,464,486,457,442,471,484,482,1357,1449,1434,1478,1388,1491,1341,1490,1325,1489,1463,1403,1309,1477,1372,1448,1418,1433,1476,1356,1462,1387,-1439,1475,1340,1447,1402,1474,1324,1461,1371,1473,269,448,1432,1417,1308,1460,-1711,1459,-1727,1441,1099,1099,1446,1386,1431,1401,-1743,1289,1083,1083,1160,1160,1458,1445,1067,1067,1370,1457,1307,1430,1129,1129,1098,1098,268,432,267,416,266,400,-1887,1144,1187,1082,1173,1113,1186,1066,1050,1158,1128,1143,1172,1097,1171,1081,420,391,1157,1112,1170,1142,1127,1065,1169,1049,1156,1096,1141,1111,1155,1080,1126,1154,1064,1153,1140,1095,1048,-2159,1125,1110,1137,-2175,823,823,1139,1138,807,807,384,264,368,263,868,838,853,791,867,822,852,837,866,806,865,790,-2319,851,821,836,352,262,850,805,849,-2399,533,533,835,820,336,261,578,548,563,577,532,532,832,772,562,562,547,547,305,275,560,515,290,290,288,258 }; - static const uint8_t tab32[] = { 130,162,193,209,44,28,76,140,9,9,9,9,9,9,9,9,190,254,222,238,126,94,157,157,109,61,173,205 }; - static const uint8_t tab33[] = { 252,236,220,204,188,172,156,140,124,108,92,76,60,44,28,12 }; - static const int16_t tabindex[2*16] = { 0,32,64,98,0,132,180,218,292,364,426,538,648,746,0,1126,1460,1460,1460,1460,1460,1460,1460,1460,1842,1842,1842,1842,1842,1842,1842,1842 }; - static const uint8_t g_linbits[] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,3,4,6,8,10,13,4,5,6,7,8,9,11,13 }; - -#define PEEK_BITS(n) (bs_cache >> (32 - n)) -#define FLUSH_BITS(n) { bs_cache <<= (n); bs_sh += (n); } -#define CHECK_BITS while (bs_sh >= 0) { bs_cache |= (uint32_t)*bs_next_ptr++ << bs_sh; bs_sh -= 8; } -#define BSPOS ((bs_next_ptr - bs->buf)*8 - 24 + bs_sh) - - float one = 0.0f; - int ireg = 0, big_val_cnt = gr_info->big_values; - const uint8_t *sfb = gr_info->sfbtab; - const uint8_t *bs_next_ptr = bs->buf + bs->pos/8; - uint32_t bs_cache = (((bs_next_ptr[0]*256u + bs_next_ptr[1])*256u + bs_next_ptr[2])*256u + bs_next_ptr[3]) << (bs->pos & 7); - int pairs_to_decode, np, bs_sh = (bs->pos & 7) - 8; - bs_next_ptr += 4; - - while (big_val_cnt > 0) - { - int tab_num = gr_info->table_select[ireg]; - int sfb_cnt = gr_info->region_count[ireg++]; - const int16_t *codebook = tabs + tabindex[tab_num]; - int linbits = g_linbits[tab_num]; - if (linbits) - { - do - { - np = *sfb++ / 2; - pairs_to_decode = MINIMP3_MIN(big_val_cnt, np); - one = *scf++; - do - { - int j, w = 5; - int leaf = codebook[PEEK_BITS(w)]; - while (leaf < 0) - { - FLUSH_BITS(w); - w = leaf & 7; - leaf = codebook[PEEK_BITS(w) - (leaf >> 3)]; - } - FLUSH_BITS(leaf >> 8); - - for (j = 0; j < 2; j++, dst++, leaf >>= 4) - { - int lsb = leaf & 0x0F; - if (lsb == 15) - { - lsb += PEEK_BITS(linbits); - FLUSH_BITS(linbits); - CHECK_BITS; - *dst = one*L3_pow_43(lsb)*((int32_t)bs_cache < 0 ? -1: 1); - } else - { - *dst = g_pow43[16 + lsb - 16*(bs_cache >> 31)]*one; - } - FLUSH_BITS(lsb ? 1 : 0); - } - CHECK_BITS; - } while (--pairs_to_decode); - } while ((big_val_cnt -= np) > 0 && --sfb_cnt >= 0); - } else - { - do - { - np = *sfb++ / 2; - pairs_to_decode = MINIMP3_MIN(big_val_cnt, np); - one = *scf++; - do - { - int j, w = 5; - int leaf = codebook[PEEK_BITS(w)]; - while (leaf < 0) - { - FLUSH_BITS(w); - w = leaf & 7; - leaf = codebook[PEEK_BITS(w) - (leaf >> 3)]; - } - FLUSH_BITS(leaf >> 8); - - for (j = 0; j < 2; j++, dst++, leaf >>= 4) - { - int lsb = leaf & 0x0F; - *dst = g_pow43[16 + lsb - 16*(bs_cache >> 31)]*one; - FLUSH_BITS(lsb ? 1 : 0); - } - CHECK_BITS; - } while (--pairs_to_decode); - } while ((big_val_cnt -= np) > 0 && --sfb_cnt >= 0); - } - } - - for (np = 1 - big_val_cnt;; dst += 4) - { - const uint8_t *codebook_count1 = (gr_info->count1_table) ? tab33 : tab32; - int leaf = codebook_count1[PEEK_BITS(4)]; - if (!(leaf & 8)) - { - leaf = codebook_count1[(leaf >> 3) + (bs_cache << 4 >> (32 - (leaf & 3)))]; - } - FLUSH_BITS(leaf & 7); - if (BSPOS > layer3gr_limit) - { - break; - } -#define RELOAD_SCALEFACTOR if (!--np) { np = *sfb++/2; if (!np) break; one = *scf++; } -#define DEQ_COUNT1(s) if (leaf & (128 >> s)) { dst[s] = ((int32_t)bs_cache < 0) ? -one : one; FLUSH_BITS(1) } - RELOAD_SCALEFACTOR; - DEQ_COUNT1(0); - DEQ_COUNT1(1); - RELOAD_SCALEFACTOR; - DEQ_COUNT1(2); - DEQ_COUNT1(3); - CHECK_BITS; - } - - bs->pos = layer3gr_limit; -} - -static void L3_midside_stereo(float *left, int n) -{ - int i = 0; - float *right = left + 576; -#if HAVE_SIMD - if (have_simd()) for (; i < n - 3; i += 4) - { - f4 vl = VLD(left + i); - f4 vr = VLD(right + i); - VSTORE(left + i, VADD(vl, vr)); - VSTORE(right + i, VSUB(vl, vr)); - } -#endif /* HAVE_SIMD */ - for (; i < n; i++) - { - float a = left[i]; - float b = right[i]; - left[i] = a + b; - right[i] = a - b; - } -} - -static void L3_intensity_stereo_band(float *left, int n, float kl, float kr) -{ - int i; - for (i = 0; i < n; i++) - { - left[i + 576] = left[i]*kr; - left[i] = left[i]*kl; - } -} - -static void L3_stereo_top_band(const float *right, const uint8_t *sfb, int nbands, int max_band[3]) -{ - int i, k; - - max_band[0] = max_band[1] = max_band[2] = -1; - - for (i = 0; i < nbands; i++) - { - for (k = 0; k < sfb[i]; k += 2) - { - if (right[k] != 0 || right[k + 1] != 0) - { - max_band[i % 3] = i; - break; - } - } - right += sfb[i]; - } -} - -static void L3_stereo_process(float *left, const uint8_t *ist_pos, const uint8_t *sfb, const uint8_t *hdr, int max_band[3], int mpeg2_sh) -{ - static const float g_pan[7*2] = { 0,1,0.21132487f,0.78867513f,0.36602540f,0.63397460f,0.5f,0.5f,0.63397460f,0.36602540f,0.78867513f,0.21132487f,1,0 }; - unsigned i, max_pos = HDR_TEST_MPEG1(hdr) ? 7 : 64; - - for (i = 0; sfb[i]; i++) - { - unsigned ipos = ist_pos[i]; - if ((int)i > max_band[i % 3] && ipos < max_pos) - { - float kl, kr, s = HDR_TEST_MS_STEREO(hdr) ? 1.41421356f : 1; - if (HDR_TEST_MPEG1(hdr)) - { - kl = g_pan[2*ipos]; - kr = g_pan[2*ipos + 1]; - } else - { - kl = 1; - kr = L3_ldexp_q2(1, (ipos + 1) >> 1 << mpeg2_sh); - if (ipos & 1) - { - kl = kr; - kr = 1; - } - } - L3_intensity_stereo_band(left, sfb[i], kl*s, kr*s); - } else if (HDR_TEST_MS_STEREO(hdr)) - { - L3_midside_stereo(left, sfb[i]); - } - left += sfb[i]; - } -} - -static void L3_intensity_stereo(float *left, uint8_t *ist_pos, const L3_gr_info_t *gr, const uint8_t *hdr) -{ - int max_band[3], n_sfb = gr->n_long_sfb + gr->n_short_sfb; - int i, max_blocks = gr->n_short_sfb ? 3 : 1; - - L3_stereo_top_band(left + 576, gr->sfbtab, n_sfb, max_band); - if (gr->n_long_sfb) - { - max_band[0] = max_band[1] = max_band[2] = MINIMP3_MAX(MINIMP3_MAX(max_band[0], max_band[1]), max_band[2]); - } - for (i = 0; i < max_blocks; i++) - { - int default_pos = HDR_TEST_MPEG1(hdr) ? 3 : 0; - int itop = n_sfb - max_blocks + i; - int prev = itop - max_blocks; - ist_pos[itop] = max_band[i] >= prev ? default_pos : ist_pos[prev]; - } - L3_stereo_process(left, ist_pos, gr->sfbtab, hdr, max_band, gr[1].scalefac_compress & 1); -} - -static void L3_reorder(float *grbuf, float *scratch, const uint8_t *sfb) -{ - int i, len; - float *src = grbuf, *dst = scratch; - - for (;0 != (len = *sfb); sfb += 3, src += 2*len) - { - for (i = 0; i < len; i++, src++) - { - *dst++ = src[0*len]; - *dst++ = src[1*len]; - *dst++ = src[2*len]; - } - } - memcpy(grbuf, scratch, (dst - scratch)*sizeof(float)); -} - -static void L3_antialias(float *grbuf, int nbands) -{ - static const float g_aa[2][8] = { - {0.85749293f,0.88174200f,0.94962865f,0.98331459f,0.99551782f,0.99916056f,0.99989920f,0.99999316f}, - {0.51449576f,0.47173197f,0.31337745f,0.18191320f,0.09457419f,0.04096558f,0.01419856f,0.00369997f} - }; - - for (; nbands > 0; nbands--, grbuf += 18) - { - int i = 0; -#if HAVE_SIMD - if (have_simd()) for (; i < 8; i += 4) - { - f4 vu = VLD(grbuf + 18 + i); - f4 vd = VLD(grbuf + 14 - i); - f4 vc0 = VLD(g_aa[0] + i); - f4 vc1 = VLD(g_aa[1] + i); - vd = VREV(vd); - VSTORE(grbuf + 18 + i, VSUB(VMUL(vu, vc0), VMUL(vd, vc1))); - vd = VADD(VMUL(vu, vc1), VMUL(vd, vc0)); - VSTORE(grbuf + 14 - i, VREV(vd)); - } -#endif /* HAVE_SIMD */ -#ifndef MINIMP3_ONLY_SIMD - for(; i < 8; i++) - { - float u = grbuf[18 + i]; - float d = grbuf[17 - i]; - grbuf[18 + i] = u*g_aa[0][i] - d*g_aa[1][i]; - grbuf[17 - i] = u*g_aa[1][i] + d*g_aa[0][i]; - } -#endif /* MINIMP3_ONLY_SIMD */ - } -} - -static void L3_dct3_9(float *y) -{ - float s0, s1, s2, s3, s4, s5, s6, s7, s8, t0, t2, t4; - - s0 = y[0]; s2 = y[2]; s4 = y[4]; s6 = y[6]; s8 = y[8]; - t0 = s0 + s6*0.5f; - s0 -= s6; - t4 = (s4 + s2)*0.93969262f; - t2 = (s8 + s2)*0.76604444f; - s6 = (s4 - s8)*0.17364818f; - s4 += s8 - s2; - - s2 = s0 - s4*0.5f; - y[4] = s4 + s0; - s8 = t0 - t2 + s6; - s0 = t0 - t4 + t2; - s4 = t0 + t4 - s6; - - s1 = y[1]; s3 = y[3]; s5 = y[5]; s7 = y[7]; - - s3 *= 0.86602540f; - t0 = (s5 + s1)*0.98480775f; - t4 = (s5 - s7)*0.34202014f; - t2 = (s1 + s7)*0.64278761f; - s1 = (s1 - s5 - s7)*0.86602540f; - - s5 = t0 - s3 - t2; - s7 = t4 - s3 - t0; - s3 = t4 + s3 - t2; - - y[0] = s4 - s7; - y[1] = s2 + s1; - y[2] = s0 - s3; - y[3] = s8 + s5; - y[5] = s8 - s5; - y[6] = s0 + s3; - y[7] = s2 - s1; - y[8] = s4 + s7; -} - -static void L3_imdct36(float *grbuf, float *overlap, const float *window, int nbands) -{ - int i, j; - static const float g_twid9[18] = { - 0.73727734f,0.79335334f,0.84339145f,0.88701083f,0.92387953f,0.95371695f,0.97629601f,0.99144486f,0.99904822f,0.67559021f,0.60876143f,0.53729961f,0.46174861f,0.38268343f,0.30070580f,0.21643961f,0.13052619f,0.04361938f - }; - - for (j = 0; j < nbands; j++, grbuf += 18, overlap += 9) - { - float co[9], si[9]; - co[0] = -grbuf[0]; - si[0] = grbuf[17]; - for (i = 0; i < 4; i++) - { - si[8 - 2*i] = grbuf[4*i + 1] - grbuf[4*i + 2]; - co[1 + 2*i] = grbuf[4*i + 1] + grbuf[4*i + 2]; - si[7 - 2*i] = grbuf[4*i + 4] - grbuf[4*i + 3]; - co[2 + 2*i] = -(grbuf[4*i + 3] + grbuf[4*i + 4]); - } - L3_dct3_9(co); - L3_dct3_9(si); - - si[1] = -si[1]; - si[3] = -si[3]; - si[5] = -si[5]; - si[7] = -si[7]; - - i = 0; - -#if HAVE_SIMD - if (have_simd()) for (; i < 8; i += 4) - { - f4 vovl = VLD(overlap + i); - f4 vc = VLD(co + i); - f4 vs = VLD(si + i); - f4 vr0 = VLD(g_twid9 + i); - f4 vr1 = VLD(g_twid9 + 9 + i); - f4 vw0 = VLD(window + i); - f4 vw1 = VLD(window + 9 + i); - f4 vsum = VADD(VMUL(vc, vr1), VMUL(vs, vr0)); - VSTORE(overlap + i, VSUB(VMUL(vc, vr0), VMUL(vs, vr1))); - VSTORE(grbuf + i, VSUB(VMUL(vovl, vw0), VMUL(vsum, vw1))); - vsum = VADD(VMUL(vovl, vw1), VMUL(vsum, vw0)); - VSTORE(grbuf + 14 - i, VREV(vsum)); - } -#endif /* HAVE_SIMD */ - for (; i < 9; i++) - { - float ovl = overlap[i]; - float sum = co[i]*g_twid9[9 + i] + si[i]*g_twid9[0 + i]; - overlap[i] = co[i]*g_twid9[0 + i] - si[i]*g_twid9[9 + i]; - grbuf[i] = ovl*window[0 + i] - sum*window[9 + i]; - grbuf[17 - i] = ovl*window[9 + i] + sum*window[0 + i]; - } - } -} - -static void L3_idct3(float x0, float x1, float x2, float *dst) -{ - float m1 = x1*0.86602540f; - float a1 = x0 - x2*0.5f; - dst[1] = x0 + x2; - dst[0] = a1 + m1; - dst[2] = a1 - m1; -} - -static void L3_imdct12(float *x, float *dst, float *overlap) -{ - static const float g_twid3[6] = { 0.79335334f,0.92387953f,0.99144486f, 0.60876143f,0.38268343f,0.13052619f }; - float co[3], si[3]; - int i; - - L3_idct3(-x[0], x[6] + x[3], x[12] + x[9], co); - L3_idct3(x[15], x[12] - x[9], x[6] - x[3], si); - si[1] = -si[1]; - - for (i = 0; i < 3; i++) - { - float ovl = overlap[i]; - float sum = co[i]*g_twid3[3 + i] + si[i]*g_twid3[0 + i]; - overlap[i] = co[i]*g_twid3[0 + i] - si[i]*g_twid3[3 + i]; - dst[i] = ovl*g_twid3[2 - i] - sum*g_twid3[5 - i]; - dst[5 - i] = ovl*g_twid3[5 - i] + sum*g_twid3[2 - i]; - } -} - -static void L3_imdct_short(float *grbuf, float *overlap, int nbands) -{ - for (;nbands > 0; nbands--, overlap += 9, grbuf += 18) - { - float tmp[18]; - memcpy(tmp, grbuf, sizeof(tmp)); - memcpy(grbuf, overlap, 6*sizeof(float)); - L3_imdct12(tmp, grbuf + 6, overlap + 6); - L3_imdct12(tmp + 1, grbuf + 12, overlap + 6); - L3_imdct12(tmp + 2, overlap, overlap + 6); - } -} - -static void L3_change_sign(float *grbuf) -{ - int b, i; - for (b = 0, grbuf += 18; b < 32; b += 2, grbuf += 36) - for (i = 1; i < 18; i += 2) - grbuf[i] = -grbuf[i]; -} - -static void L3_imdct_gr(float *grbuf, float *overlap, unsigned block_type, unsigned n_long_bands) -{ - static const float g_mdct_window[2][18] = { - { 0.99904822f,0.99144486f,0.97629601f,0.95371695f,0.92387953f,0.88701083f,0.84339145f,0.79335334f,0.73727734f,0.04361938f,0.13052619f,0.21643961f,0.30070580f,0.38268343f,0.46174861f,0.53729961f,0.60876143f,0.67559021f }, - { 1,1,1,1,1,1,0.99144486f,0.92387953f,0.79335334f,0,0,0,0,0,0,0.13052619f,0.38268343f,0.60876143f } - }; - if (n_long_bands) - { - L3_imdct36(grbuf, overlap, g_mdct_window[0], n_long_bands); - grbuf += 18*n_long_bands; - overlap += 9*n_long_bands; - } - if (block_type == SHORT_BLOCK_TYPE) - L3_imdct_short(grbuf, overlap, 32 - n_long_bands); - else - L3_imdct36(grbuf, overlap, g_mdct_window[block_type == STOP_BLOCK_TYPE], 32 - n_long_bands); -} - -static void L3_save_reservoir(mp3dec_t *h, mp3dec_scratch_t *s) -{ - int pos = (s->bs.pos + 7)/8u; - int remains = s->bs.limit/8u - pos; - if (remains > MAX_BITRESERVOIR_BYTES) - { - pos += remains - MAX_BITRESERVOIR_BYTES; - remains = MAX_BITRESERVOIR_BYTES; - } - if (remains > 0) - { - memmove(h->reserv_buf, s->maindata + pos, remains); - } - h->reserv = remains; -} - -static int L3_restore_reservoir(mp3dec_t *h, bs_t *bs, mp3dec_scratch_t *s, int main_data_begin) -{ - int frame_bytes = (bs->limit - bs->pos)/8; - int bytes_have = MINIMP3_MIN(h->reserv, main_data_begin); - memcpy(s->maindata, h->reserv_buf + MINIMP3_MAX(0, h->reserv - main_data_begin), MINIMP3_MIN(h->reserv, main_data_begin)); - memcpy(s->maindata + bytes_have, bs->buf + bs->pos/8, frame_bytes); - bs_init(&s->bs, s->maindata, bytes_have + frame_bytes); - return h->reserv >= main_data_begin; -} - -static void L3_decode(mp3dec_t *h, mp3dec_scratch_t *s, L3_gr_info_t *gr_info, int nch) -{ - int ch; - - for (ch = 0; ch < nch; ch++) - { - int layer3gr_limit = s->bs.pos + gr_info[ch].part_23_length; - L3_decode_scalefactors(h->header, s->ist_pos[ch], &s->bs, gr_info + ch, s->scf, ch); - L3_huffman(s->grbuf[ch], &s->bs, gr_info + ch, s->scf, layer3gr_limit); - } - - if (HDR_TEST_I_STEREO(h->header)) - { - L3_intensity_stereo(s->grbuf[0], s->ist_pos[1], gr_info, h->header); - } else if (HDR_IS_MS_STEREO(h->header)) - { - L3_midside_stereo(s->grbuf[0], 576); - } - - for (ch = 0; ch < nch; ch++, gr_info++) - { - int aa_bands = 31; - int n_long_bands = (gr_info->mixed_block_flag ? 2 : 0) << (int)(HDR_GET_MY_SAMPLE_RATE(h->header) == 2); - - if (gr_info->n_short_sfb) - { - aa_bands = n_long_bands - 1; - L3_reorder(s->grbuf[ch] + n_long_bands*18, s->syn[0], gr_info->sfbtab + gr_info->n_long_sfb); - } - - L3_antialias(s->grbuf[ch], aa_bands); - L3_imdct_gr(s->grbuf[ch], h->mdct_overlap[ch], gr_info->block_type, n_long_bands); - L3_change_sign(s->grbuf[ch]); - } -} - -static void mp3d_DCT_II(float *grbuf, int n) -{ - static const float g_sec[24] = { - 10.19000816f,0.50060302f,0.50241929f,3.40760851f,0.50547093f,0.52249861f,2.05778098f,0.51544732f,0.56694406f,1.48416460f,0.53104258f,0.64682180f,1.16943991f,0.55310392f,0.78815460f,0.97256821f,0.58293498f,1.06067765f,0.83934963f,0.62250412f,1.72244716f,0.74453628f,0.67480832f,5.10114861f - }; - int i, k = 0; -#if HAVE_SIMD - if (have_simd()) for (; k < n; k += 4) - { - f4 t[4][8], *x; - float *y = grbuf + k; - - for (x = t[0], i = 0; i < 8; i++, x++) - { - f4 x0 = VLD(&y[i*18]); - f4 x1 = VLD(&y[(15 - i)*18]); - f4 x2 = VLD(&y[(16 + i)*18]); - f4 x3 = VLD(&y[(31 - i)*18]); - f4 t0 = VADD(x0, x3); - f4 t1 = VADD(x1, x2); - f4 t2 = VMUL_S(VSUB(x1, x2), g_sec[3*i + 0]); - f4 t3 = VMUL_S(VSUB(x0, x3), g_sec[3*i + 1]); - x[0] = VADD(t0, t1); - x[8] = VMUL_S(VSUB(t0, t1), g_sec[3*i + 2]); - x[16] = VADD(t3, t2); - x[24] = VMUL_S(VSUB(t3, t2), g_sec[3*i + 2]); - } - for (x = t[0], i = 0; i < 4; i++, x += 8) - { - f4 x0 = x[0], x1 = x[1], x2 = x[2], x3 = x[3], x4 = x[4], x5 = x[5], x6 = x[6], x7 = x[7], xt; - xt = VSUB(x0, x7); x0 = VADD(x0, x7); - x7 = VSUB(x1, x6); x1 = VADD(x1, x6); - x6 = VSUB(x2, x5); x2 = VADD(x2, x5); - x5 = VSUB(x3, x4); x3 = VADD(x3, x4); - x4 = VSUB(x0, x3); x0 = VADD(x0, x3); - x3 = VSUB(x1, x2); x1 = VADD(x1, x2); - x[0] = VADD(x0, x1); - x[4] = VMUL_S(VSUB(x0, x1), 0.70710677f); - x5 = VADD(x5, x6); - x6 = VMUL_S(VADD(x6, x7), 0.70710677f); - x7 = VADD(x7, xt); - x3 = VMUL_S(VADD(x3, x4), 0.70710677f); - x5 = VSUB(x5, VMUL_S(x7, 0.198912367f)); /* rotate by PI/8 */ - x7 = VADD(x7, VMUL_S(x5, 0.382683432f)); - x5 = VSUB(x5, VMUL_S(x7, 0.198912367f)); - x0 = VSUB(xt, x6); xt = VADD(xt, x6); - x[1] = VMUL_S(VADD(xt, x7), 0.50979561f); - x[2] = VMUL_S(VADD(x4, x3), 0.54119611f); - x[3] = VMUL_S(VSUB(x0, x5), 0.60134488f); - x[5] = VMUL_S(VADD(x0, x5), 0.89997619f); - x[6] = VMUL_S(VSUB(x4, x3), 1.30656302f); - x[7] = VMUL_S(VSUB(xt, x7), 2.56291556f); - } - - if (k > n - 3) - { -#if HAVE_SSE -#define VSAVE2(i, v) _mm_storel_pi((__m64 *)(void*)&y[i*18], v) -#else /* HAVE_SSE */ -#define VSAVE2(i, v) vst1_f32((float32_t *)&y[i*18], vget_low_f32(v)) -#endif /* HAVE_SSE */ - for (i = 0; i < 7; i++, y += 4*18) - { - f4 s = VADD(t[3][i], t[3][i + 1]); - VSAVE2(0, t[0][i]); - VSAVE2(1, VADD(t[2][i], s)); - VSAVE2(2, VADD(t[1][i], t[1][i + 1])); - VSAVE2(3, VADD(t[2][1 + i], s)); - } - VSAVE2(0, t[0][7]); - VSAVE2(1, VADD(t[2][7], t[3][7])); - VSAVE2(2, t[1][7]); - VSAVE2(3, t[3][7]); - } else - { -#define VSAVE4(i, v) VSTORE(&y[i*18], v) - for (i = 0; i < 7; i++, y += 4*18) - { - f4 s = VADD(t[3][i], t[3][i + 1]); - VSAVE4(0, t[0][i]); - VSAVE4(1, VADD(t[2][i], s)); - VSAVE4(2, VADD(t[1][i], t[1][i + 1])); - VSAVE4(3, VADD(t[2][1 + i], s)); - } - VSAVE4(0, t[0][7]); - VSAVE4(1, VADD(t[2][7], t[3][7])); - VSAVE4(2, t[1][7]); - VSAVE4(3, t[3][7]); - } - } else -#endif /* HAVE_SIMD */ -#ifdef MINIMP3_ONLY_SIMD - {} /* for HAVE_SIMD=1, MINIMP3_ONLY_SIMD=1 case we do not need non-intrinsic "else" branch */ -#else /* MINIMP3_ONLY_SIMD */ - for (; k < n; k++) - { - float t[4][8], *x, *y = grbuf + k; - - for (x = t[0], i = 0; i < 8; i++, x++) - { - float x0 = y[i*18]; - float x1 = y[(15 - i)*18]; - float x2 = y[(16 + i)*18]; - float x3 = y[(31 - i)*18]; - float t0 = x0 + x3; - float t1 = x1 + x2; - float t2 = (x1 - x2)*g_sec[3*i + 0]; - float t3 = (x0 - x3)*g_sec[3*i + 1]; - x[0] = t0 + t1; - x[8] = (t0 - t1)*g_sec[3*i + 2]; - x[16] = t3 + t2; - x[24] = (t3 - t2)*g_sec[3*i + 2]; - } - for (x = t[0], i = 0; i < 4; i++, x += 8) - { - float x0 = x[0], x1 = x[1], x2 = x[2], x3 = x[3], x4 = x[4], x5 = x[5], x6 = x[6], x7 = x[7], xt; - xt = x0 - x7; x0 += x7; - x7 = x1 - x6; x1 += x6; - x6 = x2 - x5; x2 += x5; - x5 = x3 - x4; x3 += x4; - x4 = x0 - x3; x0 += x3; - x3 = x1 - x2; x1 += x2; - x[0] = x0 + x1; - x[4] = (x0 - x1)*0.70710677f; - x5 = x5 + x6; - x6 = (x6 + x7)*0.70710677f; - x7 = x7 + xt; - x3 = (x3 + x4)*0.70710677f; - x5 -= x7*0.198912367f; /* rotate by PI/8 */ - x7 += x5*0.382683432f; - x5 -= x7*0.198912367f; - x0 = xt - x6; xt += x6; - x[1] = (xt + x7)*0.50979561f; - x[2] = (x4 + x3)*0.54119611f; - x[3] = (x0 - x5)*0.60134488f; - x[5] = (x0 + x5)*0.89997619f; - x[6] = (x4 - x3)*1.30656302f; - x[7] = (xt - x7)*2.56291556f; - - } - for (i = 0; i < 7; i++, y += 4*18) - { - y[0*18] = t[0][i]; - y[1*18] = t[2][i] + t[3][i] + t[3][i + 1]; - y[2*18] = t[1][i] + t[1][i + 1]; - y[3*18] = t[2][i + 1] + t[3][i] + t[3][i + 1]; - } - y[0*18] = t[0][7]; - y[1*18] = t[2][7] + t[3][7]; - y[2*18] = t[1][7]; - y[3*18] = t[3][7]; - } -#endif /* MINIMP3_ONLY_SIMD */ -} - -#ifndef MINIMP3_FLOAT_OUTPUT -static int16_t mp3d_scale_pcm(float sample) -{ -#if HAVE_ARMV6 - int32_t s32 = (int32_t)(sample + .5f); - s32 -= (s32 < 0); - int16_t s = (int16_t)minimp3_clip_int16_arm(s32); -#else - if (sample >= 32766.5) return (int16_t) 32767; - if (sample <= -32767.5) return (int16_t)-32768; - int16_t s = (int16_t)(sample + .5f); - s -= (s < 0); /* away from zero, to be compliant */ -#endif - return s; -} -#else /* MINIMP3_FLOAT_OUTPUT */ -static float mp3d_scale_pcm(float sample) -{ - return sample*(1.f/32768.f); -} -#endif /* MINIMP3_FLOAT_OUTPUT */ - -static void mp3d_synth_pair(mp3d_sample_t *pcm, int nch, const float *z) -{ - float a; - a = (z[14*64] - z[ 0]) * 29; - a += (z[ 1*64] + z[13*64]) * 213; - a += (z[12*64] - z[ 2*64]) * 459; - a += (z[ 3*64] + z[11*64]) * 2037; - a += (z[10*64] - z[ 4*64]) * 5153; - a += (z[ 5*64] + z[ 9*64]) * 6574; - a += (z[ 8*64] - z[ 6*64]) * 37489; - a += z[ 7*64] * 75038; - pcm[0] = mp3d_scale_pcm(a); - - z += 2; - a = z[14*64] * 104; - a += z[12*64] * 1567; - a += z[10*64] * 9727; - a += z[ 8*64] * 64019; - a += z[ 6*64] * -9975; - a += z[ 4*64] * -45; - a += z[ 2*64] * 146; - a += z[ 0*64] * -5; - pcm[16*nch] = mp3d_scale_pcm(a); -} - -static void mp3d_synth(float *xl, mp3d_sample_t *dstl, int nch, float *lins) -{ - int i; - float *xr = xl + 576*(nch - 1); - mp3d_sample_t *dstr = dstl + (nch - 1); - - static const float g_win[] = { - -1,26,-31,208,218,401,-519,2063,2000,4788,-5517,7134,5959,35640,-39336,74992, - -1,24,-35,202,222,347,-581,2080,1952,4425,-5879,7640,5288,33791,-41176,74856, - -1,21,-38,196,225,294,-645,2087,1893,4063,-6237,8092,4561,31947,-43006,74630, - -1,19,-41,190,227,244,-711,2085,1822,3705,-6589,8492,3776,30112,-44821,74313, - -1,17,-45,183,228,197,-779,2075,1739,3351,-6935,8840,2935,28289,-46617,73908, - -1,16,-49,176,228,153,-848,2057,1644,3004,-7271,9139,2037,26482,-48390,73415, - -2,14,-53,169,227,111,-919,2032,1535,2663,-7597,9389,1082,24694,-50137,72835, - -2,13,-58,161,224,72,-991,2001,1414,2330,-7910,9592,70,22929,-51853,72169, - -2,11,-63,154,221,36,-1064,1962,1280,2006,-8209,9750,-998,21189,-53534,71420, - -2,10,-68,147,215,2,-1137,1919,1131,1692,-8491,9863,-2122,19478,-55178,70590, - -3,9,-73,139,208,-29,-1210,1870,970,1388,-8755,9935,-3300,17799,-56778,69679, - -3,8,-79,132,200,-57,-1283,1817,794,1095,-8998,9966,-4533,16155,-58333,68692, - -4,7,-85,125,189,-83,-1356,1759,605,814,-9219,9959,-5818,14548,-59838,67629, - -4,7,-91,117,177,-106,-1428,1698,402,545,-9416,9916,-7154,12980,-61289,66494, - -5,6,-97,111,163,-127,-1498,1634,185,288,-9585,9838,-8540,11455,-62684,65290 - }; - float *zlin = lins + 15*64; - const float *w = g_win; - - zlin[4*15] = xl[18*16]; - zlin[4*15 + 1] = xr[18*16]; - zlin[4*15 + 2] = xl[0]; - zlin[4*15 + 3] = xr[0]; - - zlin[4*31] = xl[1 + 18*16]; - zlin[4*31 + 1] = xr[1 + 18*16]; - zlin[4*31 + 2] = xl[1]; - zlin[4*31 + 3] = xr[1]; - - mp3d_synth_pair(dstr, nch, lins + 4*15 + 1); - mp3d_synth_pair(dstr + 32*nch, nch, lins + 4*15 + 64 + 1); - mp3d_synth_pair(dstl, nch, lins + 4*15); - mp3d_synth_pair(dstl + 32*nch, nch, lins + 4*15 + 64); - -#if HAVE_SIMD - if (have_simd()) for (i = 14; i >= 0; i--) - { -#define VLOAD(k) f4 w0 = VSET(*w++); f4 w1 = VSET(*w++); f4 vz = VLD(&zlin[4*i - 64*k]); f4 vy = VLD(&zlin[4*i - 64*(15 - k)]); -#define V0(k) { VLOAD(k) b = VADD(VMUL(vz, w1), VMUL(vy, w0)) ; a = VSUB(VMUL(vz, w0), VMUL(vy, w1)); } -#define V1(k) { VLOAD(k) b = VADD(b, VADD(VMUL(vz, w1), VMUL(vy, w0))); a = VADD(a, VSUB(VMUL(vz, w0), VMUL(vy, w1))); } -#define V2(k) { VLOAD(k) b = VADD(b, VADD(VMUL(vz, w1), VMUL(vy, w0))); a = VADD(a, VSUB(VMUL(vy, w1), VMUL(vz, w0))); } - f4 a, b; - zlin[4*i] = xl[18*(31 - i)]; - zlin[4*i + 1] = xr[18*(31 - i)]; - zlin[4*i + 2] = xl[1 + 18*(31 - i)]; - zlin[4*i + 3] = xr[1 + 18*(31 - i)]; - zlin[4*i + 64] = xl[1 + 18*(1 + i)]; - zlin[4*i + 64 + 1] = xr[1 + 18*(1 + i)]; - zlin[4*i - 64 + 2] = xl[18*(1 + i)]; - zlin[4*i - 64 + 3] = xr[18*(1 + i)]; - - V0(0) V2(1) V1(2) V2(3) V1(4) V2(5) V1(6) V2(7) - - { -#ifndef MINIMP3_FLOAT_OUTPUT -#if HAVE_SSE - static const f4 g_max = { 32767.0f, 32767.0f, 32767.0f, 32767.0f }; - static const f4 g_min = { -32768.0f, -32768.0f, -32768.0f, -32768.0f }; - __m128i pcm8 = _mm_packs_epi32(_mm_cvtps_epi32(_mm_max_ps(_mm_min_ps(a, g_max), g_min)), - _mm_cvtps_epi32(_mm_max_ps(_mm_min_ps(b, g_max), g_min))); - dstr[(15 - i)*nch] = _mm_extract_epi16(pcm8, 1); - dstr[(17 + i)*nch] = _mm_extract_epi16(pcm8, 5); - dstl[(15 - i)*nch] = _mm_extract_epi16(pcm8, 0); - dstl[(17 + i)*nch] = _mm_extract_epi16(pcm8, 4); - dstr[(47 - i)*nch] = _mm_extract_epi16(pcm8, 3); - dstr[(49 + i)*nch] = _mm_extract_epi16(pcm8, 7); - dstl[(47 - i)*nch] = _mm_extract_epi16(pcm8, 2); - dstl[(49 + i)*nch] = _mm_extract_epi16(pcm8, 6); -#else /* HAVE_SSE */ - int16x4_t pcma, pcmb; - a = VADD(a, VSET(0.5f)); - b = VADD(b, VSET(0.5f)); - pcma = vqmovn_s32(vqaddq_s32(vcvtq_s32_f32(a), vreinterpretq_s32_u32(vcltq_f32(a, VSET(0))))); - pcmb = vqmovn_s32(vqaddq_s32(vcvtq_s32_f32(b), vreinterpretq_s32_u32(vcltq_f32(b, VSET(0))))); - vst1_lane_s16(dstr + (15 - i)*nch, pcma, 1); - vst1_lane_s16(dstr + (17 + i)*nch, pcmb, 1); - vst1_lane_s16(dstl + (15 - i)*nch, pcma, 0); - vst1_lane_s16(dstl + (17 + i)*nch, pcmb, 0); - vst1_lane_s16(dstr + (47 - i)*nch, pcma, 3); - vst1_lane_s16(dstr + (49 + i)*nch, pcmb, 3); - vst1_lane_s16(dstl + (47 - i)*nch, pcma, 2); - vst1_lane_s16(dstl + (49 + i)*nch, pcmb, 2); -#endif /* HAVE_SSE */ - -#else /* MINIMP3_FLOAT_OUTPUT */ - - static const f4 g_scale = { 1.0f/32768.0f, 1.0f/32768.0f, 1.0f/32768.0f, 1.0f/32768.0f }; - a = VMUL(a, g_scale); - b = VMUL(b, g_scale); -#if HAVE_SSE - _mm_store_ss(dstr + (15 - i)*nch, _mm_shuffle_ps(a, a, _MM_SHUFFLE(1, 1, 1, 1))); - _mm_store_ss(dstr + (17 + i)*nch, _mm_shuffle_ps(b, b, _MM_SHUFFLE(1, 1, 1, 1))); - _mm_store_ss(dstl + (15 - i)*nch, _mm_shuffle_ps(a, a, _MM_SHUFFLE(0, 0, 0, 0))); - _mm_store_ss(dstl + (17 + i)*nch, _mm_shuffle_ps(b, b, _MM_SHUFFLE(0, 0, 0, 0))); - _mm_store_ss(dstr + (47 - i)*nch, _mm_shuffle_ps(a, a, _MM_SHUFFLE(3, 3, 3, 3))); - _mm_store_ss(dstr + (49 + i)*nch, _mm_shuffle_ps(b, b, _MM_SHUFFLE(3, 3, 3, 3))); - _mm_store_ss(dstl + (47 - i)*nch, _mm_shuffle_ps(a, a, _MM_SHUFFLE(2, 2, 2, 2))); - _mm_store_ss(dstl + (49 + i)*nch, _mm_shuffle_ps(b, b, _MM_SHUFFLE(2, 2, 2, 2))); -#else /* HAVE_SSE */ - vst1q_lane_f32(dstr + (15 - i)*nch, a, 1); - vst1q_lane_f32(dstr + (17 + i)*nch, b, 1); - vst1q_lane_f32(dstl + (15 - i)*nch, a, 0); - vst1q_lane_f32(dstl + (17 + i)*nch, b, 0); - vst1q_lane_f32(dstr + (47 - i)*nch, a, 3); - vst1q_lane_f32(dstr + (49 + i)*nch, b, 3); - vst1q_lane_f32(dstl + (47 - i)*nch, a, 2); - vst1q_lane_f32(dstl + (49 + i)*nch, b, 2); -#endif /* HAVE_SSE */ -#endif /* MINIMP3_FLOAT_OUTPUT */ - } - } else -#endif /* HAVE_SIMD */ -#ifdef MINIMP3_ONLY_SIMD - {} /* for HAVE_SIMD=1, MINIMP3_ONLY_SIMD=1 case we do not need non-intrinsic "else" branch */ -#else /* MINIMP3_ONLY_SIMD */ - for (i = 14; i >= 0; i--) - { -#define LOAD(k) float w0 = *w++; float w1 = *w++; float *vz = &zlin[4*i - k*64]; float *vy = &zlin[4*i - (15 - k)*64]; -#define S0(k) { int j; LOAD(k); for (j = 0; j < 4; j++) b[j] = vz[j]*w1 + vy[j]*w0, a[j] = vz[j]*w0 - vy[j]*w1; } -#define S1(k) { int j; LOAD(k); for (j = 0; j < 4; j++) b[j] += vz[j]*w1 + vy[j]*w0, a[j] += vz[j]*w0 - vy[j]*w1; } -#define S2(k) { int j; LOAD(k); for (j = 0; j < 4; j++) b[j] += vz[j]*w1 + vy[j]*w0, a[j] += vy[j]*w1 - vz[j]*w0; } - float a[4], b[4]; - - zlin[4*i] = xl[18*(31 - i)]; - zlin[4*i + 1] = xr[18*(31 - i)]; - zlin[4*i + 2] = xl[1 + 18*(31 - i)]; - zlin[4*i + 3] = xr[1 + 18*(31 - i)]; - zlin[4*(i + 16)] = xl[1 + 18*(1 + i)]; - zlin[4*(i + 16) + 1] = xr[1 + 18*(1 + i)]; - zlin[4*(i - 16) + 2] = xl[18*(1 + i)]; - zlin[4*(i - 16) + 3] = xr[18*(1 + i)]; - - S0(0) S2(1) S1(2) S2(3) S1(4) S2(5) S1(6) S2(7) - - dstr[(15 - i)*nch] = mp3d_scale_pcm(a[1]); - dstr[(17 + i)*nch] = mp3d_scale_pcm(b[1]); - dstl[(15 - i)*nch] = mp3d_scale_pcm(a[0]); - dstl[(17 + i)*nch] = mp3d_scale_pcm(b[0]); - dstr[(47 - i)*nch] = mp3d_scale_pcm(a[3]); - dstr[(49 + i)*nch] = mp3d_scale_pcm(b[3]); - dstl[(47 - i)*nch] = mp3d_scale_pcm(a[2]); - dstl[(49 + i)*nch] = mp3d_scale_pcm(b[2]); - } -#endif /* MINIMP3_ONLY_SIMD */ -} - -static void mp3d_synth_granule(float *qmf_state, float *grbuf, int nbands, int nch, mp3d_sample_t *pcm, float *lins) -{ - int i; - for (i = 0; i < nch; i++) - { - mp3d_DCT_II(grbuf + 576*i, nbands); - } - - memcpy(lins, qmf_state, sizeof(float)*15*64); - - for (i = 0; i < nbands; i += 2) - { - mp3d_synth(grbuf + i, pcm + 32*nch*i, nch, lins + i*64); - } -#ifndef MINIMP3_NONSTANDARD_BUT_LOGICAL - if (nch == 1) - { - for (i = 0; i < 15*64; i += 2) - { - qmf_state[i] = lins[nbands*64 + i]; - } - } else -#endif /* MINIMP3_NONSTANDARD_BUT_LOGICAL */ - { - memcpy(qmf_state, lins + nbands*64, sizeof(float)*15*64); - } -} - -static int mp3d_match_frame(const uint8_t *hdr, int mp3_bytes, int frame_bytes) -{ - int i, nmatch; - for (i = 0, nmatch = 0; nmatch < MAX_FRAME_SYNC_MATCHES; nmatch++) - { - i += hdr_frame_bytes(hdr + i, frame_bytes) + hdr_padding(hdr + i); - if (i + HDR_SIZE > mp3_bytes) - return nmatch > 0; - if (!hdr_compare(hdr, hdr + i)) - return 0; - } - return 1; -} - -static int mp3d_find_frame(const uint8_t *mp3, int mp3_bytes, int *free_format_bytes, int *ptr_frame_bytes) -{ - int i, k; - for (i = 0; i < mp3_bytes - HDR_SIZE; i++, mp3++) - { - if (hdr_valid(mp3)) - { - int frame_bytes = hdr_frame_bytes(mp3, *free_format_bytes); - int frame_and_padding = frame_bytes + hdr_padding(mp3); - - for (k = HDR_SIZE; !frame_bytes && k < MAX_FREE_FORMAT_FRAME_SIZE && i + 2*k < mp3_bytes - HDR_SIZE; k++) - { - if (hdr_compare(mp3, mp3 + k)) - { - int fb = k - hdr_padding(mp3); - int nextfb = fb + hdr_padding(mp3 + k); - if (i + k + nextfb + HDR_SIZE > mp3_bytes || !hdr_compare(mp3, mp3 + k + nextfb)) - continue; - frame_and_padding = k; - frame_bytes = fb; - *free_format_bytes = fb; - } - } - if ((frame_bytes && i + frame_and_padding <= mp3_bytes && - mp3d_match_frame(mp3, mp3_bytes - i, frame_bytes)) || - (!i && frame_and_padding == mp3_bytes)) - { - *ptr_frame_bytes = frame_and_padding; - return i; - } - *free_format_bytes = 0; - } - } - *ptr_frame_bytes = 0; - return mp3_bytes; -} - -void mp3dec_init(mp3dec_t *dec) -{ - dec->header[0] = 0; -} - -int mp3dec_decode_frame(mp3dec_t *dec, const uint8_t *mp3, int mp3_bytes, mp3d_sample_t *pcm, mp3dec_frame_info_t *info) -{ - int i = 0, igr, frame_size = 0, success = 1; - const uint8_t *hdr; - bs_t bs_frame[1]; - mp3dec_scratch_t scratch; - - if (mp3_bytes > 4 && dec->header[0] == 0xff && hdr_compare(dec->header, mp3)) - { - frame_size = hdr_frame_bytes(mp3, dec->free_format_bytes) + hdr_padding(mp3); - if (frame_size != mp3_bytes && (frame_size + HDR_SIZE > mp3_bytes || !hdr_compare(mp3, mp3 + frame_size))) - { - frame_size = 0; - } - } - if (!frame_size) - { - memset(dec, 0, sizeof(mp3dec_t)); - i = mp3d_find_frame(mp3, mp3_bytes, &dec->free_format_bytes, &frame_size); - if (!frame_size || i + frame_size > mp3_bytes) - { - info->frame_bytes = i; - return 0; - } - } - - hdr = mp3 + i; - memcpy(dec->header, hdr, HDR_SIZE); - info->frame_bytes = i + frame_size; - info->frame_offset = i; - info->channels = HDR_IS_MONO(hdr) ? 1 : 2; - info->hz = hdr_sample_rate_hz(hdr); - info->layer = 4 - HDR_GET_LAYER(hdr); - info->bitrate_kbps = hdr_bitrate_kbps(hdr); - - if (!pcm) - { - return hdr_frame_samples(hdr); - } - - bs_init(bs_frame, hdr + HDR_SIZE, frame_size - HDR_SIZE); - if (HDR_IS_CRC(hdr)) - { - get_bits(bs_frame, 16); - } - - if (info->layer == 3) - { - int main_data_begin = L3_read_side_info(bs_frame, scratch.gr_info, hdr); - if (main_data_begin < 0 || bs_frame->pos > bs_frame->limit) - { - mp3dec_init(dec); - return 0; - } - success = L3_restore_reservoir(dec, bs_frame, &scratch, main_data_begin); - if (success) - { - for (igr = 0; igr < (HDR_TEST_MPEG1(hdr) ? 2 : 1); igr++, pcm += 576*info->channels) - { - memset(scratch.grbuf[0], 0, 576*2*sizeof(float)); - L3_decode(dec, &scratch, scratch.gr_info + igr*info->channels, info->channels); - mp3d_synth_granule(dec->qmf_state, scratch.grbuf[0], 18, info->channels, pcm, scratch.syn[0]); - } - } - L3_save_reservoir(dec, &scratch); - } else - { -#ifdef MINIMP3_ONLY_MP3 - return 0; -#else /* MINIMP3_ONLY_MP3 */ - L12_scale_info sci[1]; - L12_read_scale_info(hdr, bs_frame, sci); - - memset(scratch.grbuf[0], 0, 576*2*sizeof(float)); - for (i = 0, igr = 0; igr < 3; igr++) - { - if (12 == (i += L12_dequantize_granule(scratch.grbuf[0] + i, bs_frame, sci, info->layer | 1))) - { - i = 0; - L12_apply_scf_384(sci, sci->scf + igr, scratch.grbuf[0]); - mp3d_synth_granule(dec->qmf_state, scratch.grbuf[0], 12, info->channels, pcm, scratch.syn[0]); - memset(scratch.grbuf[0], 0, 576*2*sizeof(float)); - pcm += 384*info->channels; - } - if (bs_frame->pos > bs_frame->limit) - { - mp3dec_init(dec); - return 0; - } - } -#endif /* MINIMP3_ONLY_MP3 */ - } - return success*hdr_frame_samples(dec->header); -} - -#ifdef MINIMP3_FLOAT_OUTPUT -void mp3dec_f32_to_s16(const float *in, int16_t *out, int num_samples) -{ - int i = 0; -#if HAVE_SIMD - int aligned_count = num_samples & ~7; - for(; i < aligned_count; i += 8) - { - static const f4 g_scale = { 32768.0f, 32768.0f, 32768.0f, 32768.0f }; - f4 a = VMUL(VLD(&in[i ]), g_scale); - f4 b = VMUL(VLD(&in[i+4]), g_scale); -#if HAVE_SSE - static const f4 g_max = { 32767.0f, 32767.0f, 32767.0f, 32767.0f }; - static const f4 g_min = { -32768.0f, -32768.0f, -32768.0f, -32768.0f }; - __m128i pcm8 = _mm_packs_epi32(_mm_cvtps_epi32(_mm_max_ps(_mm_min_ps(a, g_max), g_min)), - _mm_cvtps_epi32(_mm_max_ps(_mm_min_ps(b, g_max), g_min))); - out[i ] = _mm_extract_epi16(pcm8, 0); - out[i+1] = _mm_extract_epi16(pcm8, 1); - out[i+2] = _mm_extract_epi16(pcm8, 2); - out[i+3] = _mm_extract_epi16(pcm8, 3); - out[i+4] = _mm_extract_epi16(pcm8, 4); - out[i+5] = _mm_extract_epi16(pcm8, 5); - out[i+6] = _mm_extract_epi16(pcm8, 6); - out[i+7] = _mm_extract_epi16(pcm8, 7); -#else /* HAVE_SSE */ - int16x4_t pcma, pcmb; - a = VADD(a, VSET(0.5f)); - b = VADD(b, VSET(0.5f)); - pcma = vqmovn_s32(vqaddq_s32(vcvtq_s32_f32(a), vreinterpretq_s32_u32(vcltq_f32(a, VSET(0))))); - pcmb = vqmovn_s32(vqaddq_s32(vcvtq_s32_f32(b), vreinterpretq_s32_u32(vcltq_f32(b, VSET(0))))); - vst1_lane_s16(out+i , pcma, 0); - vst1_lane_s16(out+i+1, pcma, 1); - vst1_lane_s16(out+i+2, pcma, 2); - vst1_lane_s16(out+i+3, pcma, 3); - vst1_lane_s16(out+i+4, pcmb, 0); - vst1_lane_s16(out+i+5, pcmb, 1); - vst1_lane_s16(out+i+6, pcmb, 2); - vst1_lane_s16(out+i+7, pcmb, 3); -#endif /* HAVE_SSE */ - } -#endif /* HAVE_SIMD */ - for(; i < num_samples; i++) - { - float sample = in[i] * 32768.0f; - if (sample >= 32766.5) - out[i] = (int16_t) 32767; - else if (sample <= -32767.5) - out[i] = (int16_t)-32768; - else - { - int16_t s = (int16_t)(sample + .5f); - s -= (s < 0); /* away from zero, to be compliant */ - out[i] = s; - } - } -} -#endif /* MINIMP3_FLOAT_OUTPUT */ -#endif /* MINIMP3_IMPLEMENTATION && !_MINIMP3_IMPLEMENTATION_GUARD */