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Update src/external/dr_mp3.h

pull/669/head
Ray il y a 6 ans
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1 fichiers modifiés avec 237 ajouts et 85 suppressions
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    -85
      src/external/dr_mp3.h

+ 237
- 85
src/external/dr_mp3.h Voir le fichier

@ -1,5 +1,5 @@
// MP3 audio decoder. Public domain. See "unlicense" statement at the end of this file.
// dr_mp3 - v0.2.5 - 2018-06-22
// dr_mp3 - v0.3.2 - 2018-09-11
//
// David Reid - mackron@gmail.com
//
@ -99,28 +99,26 @@ typedef drmp3_uint32 drmp3_bool32;
// ==================
typedef struct
{
int frame_bytes;
int channels;
int hz;
int layer;
int bitrate_kbps;
int frame_bytes, channels, hz, layer, bitrate_kbps;
} drmp3dec_frame_info;
typedef struct
{
float mdct_overlap[2][9*32];
float qmf_state[15*2*32];
int reserv;
int free_format_bytes;
unsigned char header[4];
unsigned char reserv_buf[511];
float mdct_overlap[2][9*32], qmf_state[15*2*32];
int reserv, free_format_bytes;
unsigned char header[4], reserv_buf[511];
} drmp3dec;
// Initializes a low level decoder.
void drmp3dec_init(drmp3dec *dec);
// Reads a frame from a low level decoder.
int drmp3dec_decode_frame(drmp3dec *dec, const unsigned char *mp3, int mp3_bytes, short *pcm, drmp3dec_frame_info *info);
int drmp3dec_decode_frame(drmp3dec *dec, const unsigned char *mp3, int mp3_bytes, void *pcm, drmp3dec_frame_info *info);
// Helper for converting between f32 and s16.
void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, int num_samples);
// Main API (Pull API)
@ -220,7 +218,7 @@ typedef struct
drmp3_uint32 frameSampleRate; // The sample rate of the currently loaded MP3 frame. Internal use only.
drmp3_uint32 framesConsumed;
drmp3_uint32 framesRemaining;
drmp3_int16 frames[DRMP3_MAX_SAMPLES_PER_FRAME];
drmp3_uint8 frames[k">sizeof(float)*DRMP3_MAX_SAMPLES_PER_FRAME]; // <-- Multipled by sizeof(float) to ensure there's enough room for DR_MP3_FLOAT_OUTPUT.
drmp3_src src;
size_t dataSize;
size_t dataCapacity;
@ -314,8 +312,12 @@ void drmp3_free(void* p);
#define DR_MP3_NO_SIMD
#endif
#define DRMP3_OFFSET_PTR(p, offset) ((void*)((drmp3_uint8*)(p) + (offset)))
#define DRMP3_MAX_FREE_FORMAT_FRAME_SIZE 2304 /* more than ISO spec's */
#ifndef DRMP3_MAX_FRAME_SYNC_MATCHES
#define DRMP3_MAX_FRAME_SYNC_MATCHES 10
#endif
#define DRMP3_MAX_L3_FRAME_PAYLOAD_BYTES DRMP3_MAX_FREE_FORMAT_FRAME_SIZE /* MUST be >= 320000/8/32000*1152 = 1440 */
@ -361,7 +363,7 @@ void drmp3_free(void* p);
#if defined(_MSC_VER)
#include <intrin.h>
#endif
#include <immintrin.h>
#include <emmintrin.h>
#define DRMP3_HAVE_SSE 1
#define DRMP3_HAVE_SIMD 1
#define DRMP3_VSTORE _mm_storeu_ps
@ -462,44 +464,27 @@ static int drmp3_have_simd()
typedef struct
{
const drmp3_uint8 *buf;
int pos;
int limit;
int pos, limit;
} drmp3_bs;
typedef struct
{
drmp3_uint8 total_bands;
drmp3_uint8 stereo_bands;
drmp3_uint8 bitalloc[64];
drmp3_uint8 scfcod[64];
float scf[3*64];
drmp3_uint8 total_bands, stereo_bands, bitalloc[64], scfcod[64];
} drmp3_L12_scale_info;
typedef struct
{
drmp3_uint8 tab_offset;
drmp3_uint8 code_tab_width;
drmp3_uint8 band_count;
drmp3_uint8 tab_offset, code_tab_width, band_count;
} drmp3_L12_subband_alloc;
typedef struct
{
const drmp3_uint8 *sfbtab;
drmp3_uint16 part_23_length;
drmp3_uint16 big_values;
drmp3_uint16 scalefac_compress;
drmp3_uint8 global_gain;
drmp3_uint8 block_type;
drmp3_uint8 mixed_block_flag;
drmp3_uint8 n_long_sfb;
drmp3_uint8 n_short_sfb;
drmp3_uint8 table_select[3];
drmp3_uint8 region_count[3];
drmp3_uint8 subblock_gain[3];
drmp3_uint8 preflag;
drmp3_uint8 scalefac_scale;
drmp3_uint8 count1_table;
drmp3_uint8 scfsi;
drmp3_uint16 part_23_length, big_values, scalefac_compress;
drmp3_uint8 global_gain, block_type, mixed_block_flag, n_long_sfb, n_short_sfb;
drmp3_uint8 table_select[3], region_count[3], subblock_gain[3];
drmp3_uint8 preflag, scalefac_scale, count1_table, scfsi;
} drmp3_L3_gr_info;
typedef struct
@ -507,10 +492,8 @@ typedef struct
drmp3_bs bs;
drmp3_uint8 maindata[DRMP3_MAX_BITRESERVOIR_BYTES + DRMP3_MAX_L3_FRAME_PAYLOAD_BYTES];
drmp3_L3_gr_info gr_info[4];
float grbuf[2][576];
float scf[40];
float grbuf[2][576], scf[40], syn[18 + 15][2*32];
drmp3_uint8 ist_pos[2][39];
float syn[18 + 15][2*32];
} drmp3dec_scratch;
static void drmp3_bs_init(drmp3_bs *bs, const drmp3_uint8 *data, int bytes)
@ -988,17 +971,19 @@ static void drmp3_L3_decode_scalefactors(const drmp3_uint8 *hdr, drmp3_uint8 *is
}
}
static const float g_drmp3_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 drmp3_L3_pow_43(int x)
{
static const float g_pow43[129] = {
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
};
float frac;
int sign, mult = 256;
if (x < 129)
{
return g_pow43[x];
return g_drmp3_pow43[16 + x];
}
if (x < 1024)
@ -1009,12 +994,11 @@ static float drmp3_L3_pow_43(int x)
sign = 2*x & 64;
frac = (float)((x & 63) - sign) / ((x & ~63) + sign);
return g_pow43[(x + sign) >> 6]*(1.f + frac*((4.f/3) + frac*(2.f/9)))*mult;
return g_drmp3_pow43[16 + ((x + sign) >> 6)]*(1.f + frac*((4.f/3) + frac*(2.f/9)))*mult;
}
static void drmp3_L3_huffman(float *dst, drmp3_bs *bs, const drmp3_L3_gr_info *gr_info, const float *scf, int layer3gr_limit)
{
static const float g_pow43_signed[32] = { 0,0,1,-1,2.519842f,-2.519842f,4.326749f,-4.326749f,6.349604f,-6.349604f,8.549880f,-8.549880f,10.902724f,-10.902724f,13.390518f,-13.390518f,16.000000f,-16.000000f,18.720754f,-18.720754f,21.544347f,-21.544347f,24.463781f,-24.463781f,27.473142f,-27.473142f,30.567351f,-30.567351f,33.741992f,-33.741992f,36.993181f,-36.993181f };
static const drmp3_int16 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,
@ -1053,7 +1037,7 @@ static void drmp3_L3_huffman(float *dst, drmp3_bs *bs, const drmp3_L3_gr_info *g
{
int tab_num = gr_info->table_select[ireg];
int sfb_cnt = gr_info->region_count[ireg++];
const kt">short *codebook = tabs + tabindex[tab_num];
const n">drmp3_int16 *codebook = tabs + tabindex[tab_num];
int linbits = g_linbits[tab_num];
do
{
@ -1083,7 +1067,7 @@ static void drmp3_L3_huffman(float *dst, drmp3_bs *bs, const drmp3_L3_gr_info *g
*dst = one*drmp3_L3_pow_43(lsb)*((int32_t)bs_cache < 0 ? -1: 1);
} else
{
*dst = g_pow43_signed[lsb*2 + (bs_cache >> 31)]*one;
*dst = g_drmp3_pow43[16 + lsb - 16*(bs_cache >> 31)]*one;
}
DRMP3_FLUSH_BITS(lsb ? 1 : 0);
}
@ -1659,18 +1643,27 @@ static void drmp3d_DCT_II(float *grbuf, int n)
#endif
}
static short drmp3d_scale_pcm(float sample)
#ifndef DR_MP3_FLOAT_OUTPUT
typedef drmp3_int16 drmp3d_sample_t;
static drmp3_int16 drmp3d_scale_pcm(float sample)
{
if (sample > 32767.0) return (short) 32767;
if (sample < -32768.0) return (short)-32768;
kt">int s = (int)(sample + .5f);
if (sample >= 32766.5) return (drmp3_int16) 32767;
if (sample <= -32767.5) return (drmp3_int16)-32768;
n">drmp3_int16 s = (drmp3_int16)(sample + .5f);
s -= (s < 0); /* away from zero, to be compliant */
if (s > 32767) return (short) 32767;
if (s < -32768) return (short)-32768;
return (short)s;
return (drmp3_int16)s;
}
#else
typedef float drmp3d_sample_t;
static void drmp3d_synth_pair(short *pcm, int nch, const float *z)
static float drmp3d_scale_pcm(float sample)
{
return sample*(1.f/32768.f);
}
#endif
static void drmp3d_synth_pair(drmp3d_sample_t *pcm, int nch, const float *z)
{
float a;
a = (z[14*64] - z[ 0]) * 29;
@ -1695,11 +1688,11 @@ static void drmp3d_synth_pair(short *pcm, int nch, const float *z)
pcm[16*nch] = drmp3d_scale_pcm(a);
}
static void drmp3d_synth(float *xl, kt">short *dstl, int nch, float *lins)
static void drmp3d_synth(float *xl, n">drmp3d_sample_t *dstl, int nch, float *lins)
{
int i;
float *xr = xl + 576*(nch - 1);
kt">short *dstr = dstl + (nch - 1);
n">drmp3d_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,
@ -1756,19 +1749,20 @@ static void drmp3d_synth(float *xl, short *dstl, int nch, float *lins)
DRMP3_V0(0) DRMP3_V2(1) DRMP3_V1(2) DRMP3_V2(3) DRMP3_V1(4) DRMP3_V2(5) DRMP3_V1(6) DRMP3_V2(7)
{
#ifndef DR_MP3_FLOAT_OUTPUT
#if DRMP3_HAVE_SSE
static const drmp3_f4 g_max = { 32767.0f, 32767.0f, 32767.0f, 32767.0f };
static const drmp3_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] = (kt">short)_mm_extract_epi16(pcm8, 1);
dstr[(17 + i)*nch] = (kt">short)_mm_extract_epi16(pcm8, 5);
dstl[(15 - i)*nch] = (kt">short)_mm_extract_epi16(pcm8, 0);
dstl[(17 + i)*nch] = (kt">short)_mm_extract_epi16(pcm8, 4);
dstr[(47 - i)*nch] = (kt">short)_mm_extract_epi16(pcm8, 3);
dstr[(49 + i)*nch] = (kt">short)_mm_extract_epi16(pcm8, 7);
dstl[(47 - i)*nch] = (kt">short)_mm_extract_epi16(pcm8, 2);
dstl[(49 + i)*nch] = (kt">short)_mm_extract_epi16(pcm8, 6);
dstr[(15 - i)*nch] = (n">drmp3_int16)_mm_extract_epi16(pcm8, 1);
dstr[(17 + i)*nch] = (n">drmp3_int16)_mm_extract_epi16(pcm8, 5);
dstl[(15 - i)*nch] = (n">drmp3_int16)_mm_extract_epi16(pcm8, 0);
dstl[(17 + i)*nch] = (n">drmp3_int16)_mm_extract_epi16(pcm8, 4);
dstr[(47 - i)*nch] = (n">drmp3_int16)_mm_extract_epi16(pcm8, 3);
dstr[(49 + i)*nch] = (n">drmp3_int16)_mm_extract_epi16(pcm8, 7);
dstl[(47 - i)*nch] = (n">drmp3_int16)_mm_extract_epi16(pcm8, 2);
dstl[(49 + i)*nch] = (n">drmp3_int16)_mm_extract_epi16(pcm8, 6);
#else
int16x4_t pcma, pcmb;
a = DRMP3_VADD(a, DRMP3_VSET(0.5f));
@ -1784,6 +1778,30 @@ static void drmp3d_synth(float *xl, short *dstl, int nch, float *lins)
vst1_lane_s16(dstl + (47 - i)*nch, pcma, 2);
vst1_lane_s16(dstl + (49 + i)*nch, pcmb, 2);
#endif
#else
static const drmp3_f4 g_scale = { 1.0f/32768.0f, 1.0f/32768.0f, 1.0f/32768.0f, 1.0f/32768.0f };
a = DRMP3_VMUL(a, g_scale);
b = DRMP3_VMUL(b, g_scale);
#if DRMP3_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
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
#endif /* DR_MP3_FLOAT_OUTPUT */
}
} else
#endif
@ -1821,7 +1839,7 @@ static void drmp3d_synth(float *xl, short *dstl, int nch, float *lins)
#endif
}
static void drmp3d_synth_granule(float *qmf_state, float *grbuf, int nbands, int nch, kt">short *pcm, float *lins)
static void drmp3d_synth_granule(float *qmf_state, float *grbuf, int nbands, int nch, n">drmp3d_sample_t *pcm, float *lins)
{
int i;
for (i = 0; i < nch; i++)
@ -1906,7 +1924,7 @@ void drmp3dec_init(drmp3dec *dec)
dec->header[0] = 0;
}
int drmp3dec_decode_frame(drmp3dec *dec, const unsigned char *mp3, int mp3_bytes, short *pcm, drmp3dec_frame_info *info)
int drmp3dec_decode_frame(drmp3dec *dec, const unsigned char *mp3, int mp3_bytes, void *pcm, drmp3dec_frame_info *info)
{
int i = 0, igr, frame_size = 0, success = 1;
const drmp3_uint8 *hdr;
@ -1940,6 +1958,11 @@ int drmp3dec_decode_frame(drmp3dec *dec, const unsigned char *mp3, int mp3_bytes
info->layer = 4 - DRMP3_HDR_GET_LAYER(hdr);
info->bitrate_kbps = drmp3_hdr_bitrate_kbps(hdr);
if (!pcm)
{
return drmp3_hdr_frame_samples(hdr);
}
drmp3_bs_init(bs_frame, hdr + DRMP3_HDR_SIZE, frame_size - DRMP3_HDR_SIZE);
if (DRMP3_HDR_IS_CRC(hdr))
{
@ -1957,11 +1980,11 @@ int drmp3dec_decode_frame(drmp3dec *dec, const unsigned char *mp3, int mp3_bytes
success = drmp3_L3_restore_reservoir(dec, bs_frame, &scratch, main_data_begin);
if (success)
{
for (igr = 0; igr < (DRMP3_HDR_TEST_MPEG1(hdr) ? 2 : 1); igr++, pcm += 576*info->channels)
for (igr = 0; igr < (DRMP3_HDR_TEST_MPEG1(hdr) ? 2 : 1); igr++, pcm = DRMP3_OFFSET_PTR(pcm, sizeof(drmp3d_sample_t)*576*info->channels))
{
memset(scratch.grbuf[0], 0, 576*2*sizeof(float));
drmp3_L3_decode(dec, &scratch, scratch.gr_info + igr*info->channels, info->channels);
drmp3d_synth_granule(dec->qmf_state, scratch.grbuf[0], 18, info->channels, pcm, scratch.syn[0]);
drmp3d_synth_granule(dec->qmf_state, scratch.grbuf[0], 18, info->channels, p">(drmp3d_sample_t*)pcm, scratch.syn[0]);
}
}
drmp3_L3_save_reservoir(dec, &scratch);
@ -1980,9 +2003,9 @@ int drmp3dec_decode_frame(drmp3dec *dec, const unsigned char *mp3, int mp3_bytes
{
i = 0;
drmp3_L12_apply_scf_384(sci, sci->scf + igr, scratch.grbuf[0]);
drmp3d_synth_granule(dec->qmf_state, scratch.grbuf[0], 12, info->channels, pcm, scratch.syn[0]);
drmp3d_synth_granule(dec->qmf_state, scratch.grbuf[0], 12, info->channels, p">(drmp3d_sample_t*)pcm, scratch.syn[0]);
memset(scratch.grbuf[0], 0, 576*2*sizeof(float));
pcm += 384*info->channels;
pcm = DRMP3_OFFSET_PTR(pcm, sizeof(drmp3d_sample_t)*384*info->channels);
}
if (bs_frame->pos > bs_frame->limit)
{
@ -1995,6 +2018,64 @@ int drmp3dec_decode_frame(drmp3dec *dec, const unsigned char *mp3, int mp3_bytes
return success*drmp3_hdr_frame_samples(dec->header);
}
void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, int num_samples)
{
if(num_samples > 0)
{
int i = 0;
#if DRMP3_HAVE_SIMD
int aligned_count = num_samples & ~7;
for(; i < aligned_count; i+=8)
{
static const drmp3_f4 g_scale = { 32768.0f, 32768.0f, 32768.0f, 32768.0f };
drmp3_f4 a = DRMP3_VMUL(DRMP3_VLD(&in[i ]), g_scale);
drmp3_f4 b = DRMP3_VMUL(DRMP3_VLD(&in[i+4]), g_scale);
#if DRMP3_HAVE_SSE
static const drmp3_f4 g_max = { 32767.0f, 32767.0f, 32767.0f, 32767.0f };
static const drmp3_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 ] = (drmp3_int16)_mm_extract_epi16(pcm8, 0);
out[i+1] = (drmp3_int16)_mm_extract_epi16(pcm8, 1);
out[i+2] = (drmp3_int16)_mm_extract_epi16(pcm8, 2);
out[i+3] = (drmp3_int16)_mm_extract_epi16(pcm8, 3);
out[i+4] = (drmp3_int16)_mm_extract_epi16(pcm8, 4);
out[i+5] = (drmp3_int16)_mm_extract_epi16(pcm8, 5);
out[i+6] = (drmp3_int16)_mm_extract_epi16(pcm8, 6);
out[i+7] = (drmp3_int16)_mm_extract_epi16(pcm8, 7);
#else
int16x4_t pcma, pcmb;
a = DRMP3_VADD(a, DRMP3_VSET(0.5f));
b = DRMP3_VADD(b, DRMP3_VSET(0.5f));
pcma = vqmovn_s32(vqaddq_s32(vcvtq_s32_f32(a), vreinterpretq_s32_u32(vcltq_f32(a, DRMP3_VSET(0)))));
pcmb = vqmovn_s32(vqaddq_s32(vcvtq_s32_f32(b), vreinterpretq_s32_u32(vcltq_f32(b, DRMP3_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
}
#endif
for(; i < num_samples; i++)
{
float sample = in[i] * 32768.0f;
if (sample >= 32766.5)
out[i] = (drmp3_int16) 32767;
else if (sample <= -32767.5)
out[i] = (drmp3_int16)-32768;
else
{
short s = (drmp3_int16)(sample + .5f);
s -= (s < 0); /* away from zero, to be compliant */
out[i] = s;
}
}
}
}
@ -2004,6 +2085,16 @@ int drmp3dec_decode_frame(drmp3dec *dec, const unsigned char *mp3, int mp3_bytes
//
///////////////////////////////////////////////////////////////////////////////
#if defined(SIZE_MAX)
#define DRMP3_SIZE_MAX SIZE_MAX
#else
#if defined(_WIN64) || defined(_LP64) || defined(__LP64__)
#define DRMP3_SIZE_MAX ((drmp3_uint64)0xFFFFFFFFFFFFFFFF)
#else
#define DRMP3_SIZE_MAX 0xFFFFFFFF
#endif
#endif
// Options.
#ifndef DR_MP3_DEFAULT_CHANNELS
#define DR_MP3_DEFAULT_CHANNELS 2
@ -2311,8 +2402,10 @@ static drmp3_bool32 drmp3_decode_next_frame(drmp3* pMP3)
size_t bytesRead = pMP3->onRead(pMP3->pUserData, pMP3->pData + pMP3->dataSize, (pMP3->dataCapacity - pMP3->dataSize));
if (bytesRead == 0) {
pMP3->atEnd = DRMP3_TRUE;
return DRMP3_FALSE; // No data.
if (pMP3->dataSize == 0) {
pMP3->atEnd = DRMP3_TRUE;
return DRMP3_FALSE; // No data.
}
}
pMP3->dataSize += bytesRead;
@ -2324,7 +2417,7 @@ static drmp3_bool32 drmp3_decode_next_frame(drmp3* pMP3)
}
drmp3dec_frame_info info;
drmp3_uint32 samplesRead = drmp3dec_decode_frame(&pMP3->decoder, pMP3->pData, (int)pMP3->dataSize, pMP3->frames, &info); // <-- Safe size_t -> int conversion thanks to the check above.
drmp3_uint32 samplesRead = drmp3dec_decode_frame(&pMP3->decoder, pMP3->pData, (int)pMP3->dataSize, p">(drmp3d_sample_t*)pMP3->frames, &info); // <-- Safe size_t -> int conversion thanks to the check above.
if (samplesRead != 0) {
size_t leftoverDataSize = (pMP3->dataSize - (size_t)info.frame_bytes);
for (size_t i = 0; i < leftoverDataSize; ++i) {
@ -2377,28 +2470,54 @@ static drmp3_uint64 drmp3_read_src(drmp3_src* pSRC, drmp3_uint64 frameCount, voi
while (frameCount > 0) {
// Read from the in-memory buffer first.
while (pMP3->framesRemaining > 0 && frameCount > 0) {
drmp3d_sample_t* frames = (drmp3d_sample_t*)pMP3->frames;
#ifndef DR_MP3_FLOAT_OUTPUT
if (pMP3->frameChannels == 1) {
if (pMP3->channels == 1) {
// Mono -> Mono.
pFramesOutF[0] = frames[pMP3->framesConsumed] / 32768.0f;
} else {
// Mono -> Stereo.
pFramesOutF[0] = frames[pMP3->framesConsumed] / 32768.0f;
pFramesOutF[1] = frames[pMP3->framesConsumed] / 32768.0f;
}
} else {
if (pMP3->channels == 1) {
// Stereo -> Mono
float sample = 0;
sample += frames[(pMP3->framesConsumed*pMP3->frameChannels)+0] / 32768.0f;
sample += frames[(pMP3->framesConsumed*pMP3->frameChannels)+1] / 32768.0f;
pFramesOutF[0] = sample * 0.5f;
} else {
// Stereo -> Stereo
pFramesOutF[0] = frames[(pMP3->framesConsumed*pMP3->frameChannels)+0] / 32768.0f;
pFramesOutF[1] = frames[(pMP3->framesConsumed*pMP3->frameChannels)+1] / 32768.0f;
}
}
#else
if (pMP3->frameChannels == 1) {
if (pMP3->channels == 1) {
// Mono -> Mono.
pFramesOutF[0] = pMP3->frames[pMP3->framesConsumed] / 32768.0f;
pFramesOutF[0] = frames[pMP3->framesConsumed];
} else {
// Mono -> Stereo.
pFramesOutF[0] = pMP3->frames[pMP3->framesConsumed] / 32768.0f;
pFramesOutF[1] = pMP3->frames[pMP3->framesConsumed] / 32768.0f;
pFramesOutF[0] = frames[pMP3->framesConsumed];
pFramesOutF[1] = frames[pMP3->framesConsumed];
}
} else {
if (pMP3->channels == 1) {
// Stereo -> Mono
float sample = 0;
sample += pMP3->frames[(pMP3->framesConsumed*pMP3->frameChannels)+0] / 32768.0f;
sample += pMP3->frames[(pMP3->framesConsumed*pMP3->frameChannels)+1] / 32768.0f;
sample += frames[(pMP3->framesConsumed*pMP3->frameChannels)+0];
sample += frames[(pMP3->framesConsumed*pMP3->frameChannels)+1];
pFramesOutF[0] = sample * 0.5f;
} else {
// Stereo -> Stereo
pFramesOutF[0] = pMP3->frames[(pMP3->framesConsumed*pMP3->frameChannels)+0] / 32768.0f;
pFramesOutF[1] = pMP3->frames[(pMP3->framesConsumed*pMP3->frameChannels)+1] / 32768.0f;
pFramesOutF[0] = frames[(pMP3->framesConsumed*pMP3->frameChannels)+0];
pFramesOutF[1] = frames[(pMP3->framesConsumed*pMP3->frameChannels)+1];
}
}
#endif
pMP3->framesConsumed += 1;
pMP3->framesRemaining -= 1;
@ -2466,11 +2585,13 @@ drmp3_bool32 drmp3_init_internal(drmp3* pMP3, drmp3_read_proc onRead, drmp3_seek
srcConfig.channels = pMP3->channels;
srcConfig.algorithm = drmp3_src_algorithm_linear;
if (!drmp3_src_init(&srcConfig, drmp3_read_src, pMP3, &pMP3->src)) {
drmp3_uninit(pMP3);
return DRMP3_FALSE;
}
// Decode the first frame to confirm that it is indeed a valid MP3 stream.
if (!drmp3_decode_next_frame(pMP3)) {
drmp3_uninit(pMP3);
return DRMP3_FALSE; // Not a valid MP3 stream.
}
@ -2681,7 +2802,7 @@ float* drmp3__full_decode_and_close_f32(drmp3* pMP3, drmp3_config* pConfig, drmp
}
drmp3_uint64 newFramesBufferSize = framesCapacity*pMP3->channels*sizeof(float);
if (newFramesBufferSize > SIZE_MAX) {
if (newFramesBufferSize > DRMP3_SIZE_MAX) {
break;
}
@ -2771,6 +2892,37 @@ void drmp3_free(void* p)
// REVISION HISTORY
// ===============
//
// v0.3.2 - 2018-09-11
// - Fix a couple of memory leaks.
// - Bring up to date with minimp3.
//
// v0.3.1 - 2018-08-25
// - Fix C++ build.
//
// v0.3.0 - 2018-08-25
// - Bring up to date with minimp3. This has a minor API change: the "pcm" parameter of drmp3dec_decode_frame() has
// been changed from short* to void* because it can now output both s16 and f32 samples, depending on whether or
// not the DR_MP3_FLOAT_OUTPUT option is set.
//
// v0.2.11 - 2018-08-08
// - Fix a bug where the last part of a file is not read.
//
// v0.2.10 - 2018-08-07
// - Improve 64-bit detection.
//
// v0.2.9 - 2018-08-05
// - Fix C++ build on older versions of GCC.
// - Bring up to date with minimp3.
//
// v0.2.8 - 2018-08-02
// - Fix compilation errors with older versions of GCC.
//
// v0.2.7 - 2018-07-13
// - Bring up to date with minimp3.
//
// v0.2.6 - 2018-07-12
// - Bring up to date with minimp3.
//
// v0.2.5 - 2018-06-22
// - Bring up to date with minimp3.
//

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