*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+/**
+ * @file mpegaudiodec.c
+ * MPEG Audio decoder.
+ */
+
//#define DEBUG
#include "avcodec.h"
-#include "mpegaudio.h"
+#include "bitstream.h"
+#include "dsputil.h"
/*
* TODO:
/* define USE_HIGHPRECISION to have a bit exact (but slower) mpeg
audio decoder */
-//#define USE_HIGHPRECISION
-
-#ifdef USE_HIGHPRECISION
-#define FRAC_BITS 23 /* fractional bits for sb_samples and dct */
-#define WFRAC_BITS 16 /* fractional bits for window */
-#else
-#define FRAC_BITS 15 /* fractional bits for sb_samples and dct */
-#define WFRAC_BITS 14 /* fractional bits for window */
+#ifdef CONFIG_MPEGAUDIO_HP
+#define USE_HIGHPRECISION
#endif
+#include "mpegaudio.h"
+
#define FRAC_ONE (1 << FRAC_BITS)
-#define MULL(a,b) (((INT64)(a) * (INT64)(b)) >> FRAC_BITS)
-#define MUL64(a,b) ((INT64)(a) * (INT64)(b))
+#define MULL(a,b) (((int64_t)(a) * (int64_t)(b)) >> FRAC_BITS)
+#define MUL64(a,b) ((int64_t)(a) * (int64_t)(b))
#define FIX(a) ((int)((a) * FRAC_ONE))
/* WARNING: only correct for posititive numbers */
#define FIXR(a) ((int)((a) * FRAC_ONE + 0.5))
#define FRAC_RND(a) (((a) + (FRAC_ONE/2)) >> FRAC_BITS)
-#if FRAC_BITS <= 15
-typedef INT16 MPA_INT;
-#else
-typedef INT32 MPA_INT;
-#endif
+#define FIXHR(a) ((int)((a) * (1LL<<32) + 0.5))
+//#define MULH(a,b) (((int64_t)(a) * (int64_t)(b))>>32) //gcc 3.4 creates an incredibly bloated mess out of this
+static always_inline int MULH(int a, int b){
+ return ((int64_t)(a) * (int64_t)(b))>>32;
+}
/****************/
#define HEADER_SIZE 4
#define BACKSTEP_SIZE 512
+struct GranuleDef;
+
typedef struct MPADecodeContext {
- UINT8 inbuf1[2][MPA_MAX_CODED_FRAME_SIZE + BACKSTEP_SIZE]; /* input buffer */
+ uint8_t inbuf1[2][MPA_MAX_CODED_FRAME_SIZE + BACKSTEP_SIZE]; /* input buffer */
int inbuf_index;
- UINT8 *inbuf_ptr, *inbuf;
+ uint8_t *inbuf_ptr, *inbuf;
int frame_size;
int free_format_frame_size; /* frame size in case of free format
(zero if currently unknown) */
/* next header (used in free format parsing) */
- UINT32 free_format_next_header;
+ uint32_t free_format_next_header;
int error_protection;
int layer;
int sample_rate;
int mode;
int mode_ext;
int lsf;
- MPA_INT synth_buf[MPA_MAX_CHANNELS][512 * 2];
+ MPA_INT synth_buf[MPA_MAX_CHANNELS][512 * 2] __attribute__((aligned(16)));
int synth_buf_offset[MPA_MAX_CHANNELS];
- INT32 sb_samples[MPA_MAX_CHANNELS][36][SBLIMIT];
- INT32 mdct_buf[MPA_MAX_CHANNELS][SBLIMIT * 18]; /* previous samples, for layer 3 MDCT */
+ int32_t sb_samples[MPA_MAX_CHANNELS][36][SBLIMIT] __attribute__((aligned(16)));
+ int32_t mdct_buf[MPA_MAX_CHANNELS][SBLIMIT * 18]; /* previous samples, for layer 3 MDCT */
#ifdef DEBUG
int frame_count;
#endif
+ void (*compute_antialias)(struct MPADecodeContext *s, struct GranuleDef *g);
+ int adu_mode; ///< 0 for standard mp3, 1 for adu formatted mp3
+ unsigned int dither_state;
} MPADecodeContext;
+/**
+ * Context for MP3On4 decoder
+ */
+typedef struct MP3On4DecodeContext {
+ int frames; ///< number of mp3 frames per block (number of mp3 decoder instances)
+ int chan_cfg; ///< channel config number
+ MPADecodeContext *mp3decctx[5]; ///< MPADecodeContext for every decoder instance
+} MP3On4DecodeContext;
+
/* layer 3 "granule" */
typedef struct GranuleDef {
- UINT8 scfsi;
+ uint8_t scfsi;
int part2_3_length;
int big_values;
int global_gain;
int scalefac_compress;
- UINT8 block_type;
- UINT8 switch_point;
+ uint8_t block_type;
+ uint8_t switch_point;
int table_select[3];
int subblock_gain[3];
- UINT8 scalefac_scale;
- UINT8 count1table_select;
+ uint8_t scalefac_scale;
+ uint8_t count1table_select;
int region_size[3]; /* number of huffman codes in each region */
int preflag;
int short_start, long_end; /* long/short band indexes */
- UINT8 scale_factors[40];
- INT32 sb_hybrid[SBLIMIT * 18]; /* 576 samples */
+ uint8_t scale_factors[40];
+ int32_t sb_hybrid[SBLIMIT * 18]; /* 576 samples */
} GranuleDef;
#define MODE_EXT_MS_STEREO 2
/* layer 3 huffman tables */
typedef struct HuffTable {
int xsize;
- const UINT8 *bits;
- const UINT16 *codes;
+ const uint8_t *bits;
+ const uint16_t *codes;
} HuffTable;
#include "mpegaudiodectab.h"
+static void compute_antialias_integer(MPADecodeContext *s, GranuleDef *g);
+static void compute_antialias_float(MPADecodeContext *s, GranuleDef *g);
+
/* vlc structure for decoding layer 3 huffman tables */
-static VLC huff_vlc[16];
-static UINT8 *huff_code_table[16];
+static VLC huff_vlc[16];
+static uint8_t *huff_code_table[16];
static VLC huff_quad_vlc[2];
/* computed from band_size_long */
-static UINT16 band_index_long[9][23];
+static uint16_t band_index_long[9][23];
/* XXX: free when all decoders are closed */
-#define TABLE_4_3_SIZE (8191 + 16)
-static INT8 *table_4_3_exp;
-#if FRAC_BITS <= 15
-static UINT16 *table_4_3_value;
-#else
-static UINT32 *table_4_3_value;
-#endif
+#define TABLE_4_3_SIZE (8191 + 16)*4
+static int8_t *table_4_3_exp;
+static uint32_t *table_4_3_value;
/* intensity stereo coef table */
-static INT32 is_table[2][16];
-static INT32 is_table_lsf[2][2][16];
-static INT32 csa_table[8][2];
-static INT32 mdct_win[8][36];
+static int32_t is_table[2][16];
+static int32_t is_table_lsf[2][2][16];
+static int32_t csa_table[8][4];
+static float csa_table_float[8][4];
+static int32_t mdct_win[8][36];
/* lower 2 bits: modulo 3, higher bits: shift */
-static UINT16 scale_factor_modshift[64];
+static uint16_t scale_factor_modshift[64];
/* [i][j]: 2^(-j/3) * FRAC_ONE * 2^(i+2) / (2^(i+2) - 1) */
-static INT32 scale_factor_mult[15][3];
+static int32_t scale_factor_mult[15][3];
/* mult table for layer 2 group quantization */
#define SCALE_GEN(v) \
{ FIXR(1.0 * (v)), FIXR(0.7937005259 * (v)), FIXR(0.6299605249 * (v)) }
-static INT32 scale_factor_mult2[3][3] = {
- SCALE_GEN(1.0 / 3.0), /* 3 steps */
- SCALE_GEN(1.0 / 5.0), /* 5 steps */
- SCALE_GEN(1.0 / 9.0), /* 9 steps */
+static const int32_t scale_factor_mult2[3][3] = {
+ SCALE_GEN(4.0 / 3.0), /* 3 steps */
+ SCALE_GEN(4.0 / 5.0), /* 5 steps */
+ SCALE_GEN(4.0 / 9.0), /* 9 steps */
};
-/* 2^(n/4) */
-static UINT32 scale_factor_mult3[4] = {
- FIXR(1.0),
- FIXR(1.18920711500272106671),
- FIXR(1.41421356237309504880),
- FIXR(1.68179283050742908605),
-};
+void ff_mpa_synth_init(MPA_INT *window);
+static MPA_INT window[512] __attribute__((aligned(16)));
-static MPA_INT window[512];
-
/* layer 1 unscaling */
/* n = number of bits of the mantissa minus 1 */
static inline int l1_unscale(int n, int mant, int scale_factor)
{
int shift, mod;
- INT64 val;
+ int64_t val;
shift = scale_factor_modshift[scale_factor];
mod = shift & 3;
shift >>= 2;
val = MUL64(mant + (-1 << n) + 1, scale_factor_mult[n-1][mod]);
shift += n;
- return (int)((val + (1 << (shift - 1))) >> shift);
+ /* NOTE: at this point, 1 <= shift >= 21 + 15 */
+ return (int)((val + (1LL << (shift - 1))) >> shift);
}
static inline int l2_unscale_group(int steps, int mant, int scale_factor)
shift = scale_factor_modshift[scale_factor];
mod = shift & 3;
shift >>= 2;
- /* XXX: store the result directly */
- val = (2 * (mant - (steps >> 1))) * scale_factor_mult2[steps >> 2][mod];
- return (val + (1 << (shift - 1))) >> shift;
+
+ val = (mant - (steps >> 1)) * scale_factor_mult2[steps >> 2][mod];
+ /* NOTE: at this point, 0 <= shift <= 21 */
+ if (shift > 0)
+ val = (val + (1 << (shift - 1))) >> shift;
+ return val;
}
/* compute value^(4/3) * 2^(exponent/4). It normalized to FRAC_BITS */
static inline int l3_unscale(int value, int exponent)
{
-#if FRAC_BITS <= 15
unsigned int m;
-#else
- UINT64 m;
-#endif
int e;
- e = table_4_3_exp[value];
- e += (exponent >> 2);
- e = FRAC_BITS - e;
-#if FRAC_BITS <= 15
+ e = table_4_3_exp [4*value + (exponent&3)];
+ m = table_4_3_value[4*value + (exponent&3)];
+ e -= (exponent >> 2);
+ assert(e>=1);
if (e > 31)
- e = 31;
-#endif
- m = table_4_3_value[value];
-#if FRAC_BITS <= 15
- m = (m * scale_factor_mult3[exponent & 3]);
+ return 0;
m = (m + (1 << (e-1))) >> e;
+
return m;
-#else
- m = MUL64(m, scale_factor_mult3[exponent & 3]);
- m = (m + (UINT64_C(1) << (e-1))) >> e;
- return m;
-#endif
}
/* all integer n^(4/3) computation code */
#define POW_FRAC_BITS 24
#define POW_FRAC_ONE (1 << POW_FRAC_BITS)
#define POW_FIX(a) ((int)((a) * POW_FRAC_ONE))
-#define POW_MULL(a,b) (((INT64)(a) * (INT64)(b)) >> POW_FRAC_BITS)
+#define POW_MULL(a,b) (((int64_t)(a) * (int64_t)(b)) >> POW_FRAC_BITS)
static int dev_4_3_coefs[DEV_ORDER];
+#if 0 /* unused */
static int pow_mult3[3] = {
POW_FIX(1.0),
POW_FIX(1.25992104989487316476),
POW_FIX(1.58740105196819947474),
};
+#endif
static void int_pow_init(void)
{
}
}
+#if 0 /* unused, remove? */
/* return the mantissa and the binary exponent */
static int int_pow(int i, int *exp_ptr)
{
int e, er, eq, j;
int a, a1;
-
+
/* renormalize */
a = i;
e = POW_FRAC_BITS;
eq--;
}
/* now POW_FRAC_ONE <= a < 2 * POW_FRAC_ONE */
-#if (POW_FRAC_BITS - 1) > FRAC_BITS
+#if POW_FRAC_BITS > FRAC_BITS
a = (a + (1 << (POW_FRAC_BITS - FRAC_BITS - 1))) >> (POW_FRAC_BITS - FRAC_BITS);
/* correct overflow */
if (a >= 2 * (1 << FRAC_BITS)) {
*exp_ptr = eq;
return a;
}
+#endif
static int decode_init(AVCodecContext * avctx)
{
MPADecodeContext *s = avctx->priv_data;
- static int init;
+ static int init=0;
int i, j, k;
- if(!init) {
+#if defined(USE_HIGHPRECISION) && defined(CONFIG_AUDIO_NONSHORT)
+ avctx->sample_fmt= SAMPLE_FMT_S32;
+#else
+ avctx->sample_fmt= SAMPLE_FMT_S16;
+#endif
+
+ if(avctx->antialias_algo != FF_AA_FLOAT)
+ s->compute_antialias= compute_antialias_integer;
+ else
+ s->compute_antialias= compute_antialias_float;
+
+ if (!init && !avctx->parse_only) {
/* scale factors table for layer 1/2 */
for(i=0;i<64;i++) {
int shift, mod;
/* 1.0 (i = 3) is normalized to 2 ^ FRAC_BITS */
- shift = (i / 3) - 1;
+ shift = (i / 3);
mod = i % 3;
-#if FRAC_BITS <= 15
- if (shift > 31)
- shift = 31;
-#endif
scale_factor_modshift[i] = mod | (shift << 2);
}
for(i=0;i<15;i++) {
int n, norm;
n = i + 2;
- norm = ((INT64_C(1) << n) * FRAC_ONE) / ((1 << n) - 1);
- scale_factor_mult[i][0] = MULL(FIXR(1.0), norm);
- scale_factor_mult[i][1] = MULL(FIXR(0.7937005259), norm);
- scale_factor_mult[i][2] = MULL(FIXR(0.6299605249), norm);
+ norm = ((int64_t_C(1) << n) * FRAC_ONE) / ((1 << n) - 1);
+ scale_factor_mult[i][0] = MULL(FIXR(1.0 * 2.0), norm);
+ scale_factor_mult[i][1] = MULL(FIXR(0.7937005259 * 2.0), norm);
+ scale_factor_mult[i][2] = MULL(FIXR(0.6299605249 * 2.0), norm);
dprintf("%d: norm=%x s=%x %x %x\n",
- i, norm,
+ i, norm,
scale_factor_mult[i][0],
scale_factor_mult[i][1],
scale_factor_mult[i][2]);
}
-
- /* window */
- /* max = 18760, max sum over all 16 coefs : 44736 */
- for(i=0;i<257;i++) {
- int v;
- v = mpa_enwindow[i];
-#if WFRAC_BITS < 16
- v = (v + (1 << (16 - WFRAC_BITS - 1))) >> (16 - WFRAC_BITS);
-#endif
- window[i] = v;
- if ((i & 63) != 0)
- v = -v;
- if (i != 0)
- window[512 - i] = v;
- }
-
+
+ ff_mpa_synth_init(window);
+
/* huffman decode tables */
huff_code_table[0] = NULL;
for(i=1;i<16;i++) {
const HuffTable *h = &mpa_huff_tables[i];
- int xsize, n, x, y;
- UINT8 *code_table;
+ int xsize, x, y;
+ unsigned int n;
+ uint8_t *code_table;
xsize = h->xsize;
n = xsize * xsize;
/* XXX: fail test */
- init_vlc(&huff_vlc[i], 8, n,
- h->bits, 1, 1, h->codes, 2, 2);
-
+ init_vlc(&huff_vlc[i], 8, n,
+ h->bits, 1, 1, h->codes, 2, 2, 1);
+
code_table = av_mallocz(n);
j = 0;
for(x=0;x<xsize;x++) {
huff_code_table[i] = code_table;
}
for(i=0;i<2;i++) {
- init_vlc(&huff_quad_vlc[i], i == 0 ? 7 : 4, 16,
- mpa_quad_bits[i], 1, 1, mpa_quad_codes[i], 1, 1);
+ init_vlc(&huff_quad_vlc[i], i == 0 ? 7 : 4, 16,
+ mpa_quad_bits[i], 1, 1, mpa_quad_codes[i], 1, 1, 1);
}
for(i=0;i<9;i++) {
}
/* compute n ^ (4/3) and store it in mantissa/exp format */
- table_4_3_exp = av_mallocz(TABLE_4_3_SIZE *
- sizeof(table_4_3_exp[0]));
- if (!table_4_3_exp)
+ table_4_3_exp= av_mallocz_static(TABLE_4_3_SIZE * sizeof(table_4_3_exp[0]));
+ if(!table_4_3_exp)
return -1;
- table_4_3_value = av_mallocz(TABLE_4_3_SIZE *
- sizeof(table_4_3_value[0]));
- if (!table_4_3_value) {
- av_free(table_4_3_exp);
+ table_4_3_value= av_mallocz_static(TABLE_4_3_SIZE * sizeof(table_4_3_value[0]));
+ if(!table_4_3_value)
return -1;
- }
-
+
int_pow_init();
for(i=1;i<TABLE_4_3_SIZE;i++) {
+ double f, fm;
int e, m;
- m = int_pow(i, &e);
-#if 0
- /* test code */
- {
- double f, fm;
- int e1, m1;
- f = pow((double)i, 4.0 / 3.0);
- fm = frexp(f, &e1);
- m1 = FIXR(2 * fm);
-#if FRAC_BITS <= 15
- if ((unsigned short)m1 != m1) {
- m1 = m1 >> 1;
- e1++;
- }
-#endif
- e1--;
- if (m != m1 || e != e1) {
- printf("%4d: m=%x m1=%x e=%d e1=%d\n",
- i, m, m1, e, e1);
- }
- }
-#endif
+ f = pow((double)(i/4), 4.0 / 3.0) * pow(2, (i&3)*0.25);
+ fm = frexp(f, &e);
+ m = (uint32_t)(fm*(1LL<<31) + 0.5);
+ e+= FRAC_BITS - 31 + 5;
+
/* normalized to FRAC_BITS */
table_4_3_value[i] = m;
- table_4_3_exp[i] = e;
+// av_log(NULL, AV_LOG_DEBUG, "%d %d %f\n", i, m, pow((double)i, 4.0 / 3.0));
+ table_4_3_exp[i] = -e;
}
-
+
for(i=0;i<7;i++) {
float f;
int v;
k = i & 1;
is_table_lsf[j][k ^ 1][i] = FIXR(f);
is_table_lsf[j][k][i] = FIXR(1.0);
- dprintf("is_table_lsf %d %d: %x %x\n",
+ dprintf("is_table_lsf %d %d: %x %x\n",
i, j, is_table_lsf[j][0][i], is_table_lsf[j][1][i]);
}
}
ci = ci_table[i];
cs = 1.0 / sqrt(1.0 + ci * ci);
ca = cs * ci;
- csa_table[i][0] = FIX(cs);
- csa_table[i][1] = FIX(ca);
+ csa_table[i][0] = FIXHR(cs/4);
+ csa_table[i][1] = FIXHR(ca/4);
+ csa_table[i][2] = FIXHR(ca/4) + FIXHR(cs/4);
+ csa_table[i][3] = FIXHR(ca/4) - FIXHR(cs/4);
+ csa_table_float[i][0] = cs;
+ csa_table_float[i][1] = ca;
+ csa_table_float[i][2] = ca + cs;
+ csa_table_float[i][3] = ca - cs;
+// printf("%d %d %d %d\n", FIX(cs), FIX(cs-1), FIX(ca), FIX(cs)-FIX(ca));
+// av_log(NULL, AV_LOG_DEBUG,"%f %f %f %f\n", cs, ca, ca+cs, ca-cs);
}
/* compute mdct windows */
for(i=0;i<36;i++) {
- int v;
- v = FIXR(sin(M_PI * (i + 0.5) / 36.0));
- mdct_win[0][i] = v;
- mdct_win[1][i] = v;
- mdct_win[3][i] = v;
- }
- for(i=0;i<6;i++) {
- mdct_win[1][18 + i] = FIXR(1.0);
- mdct_win[1][24 + i] = FIXR(sin(M_PI * ((i + 6) + 0.5) / 12.0));
- mdct_win[1][30 + i] = FIXR(0.0);
-
- mdct_win[3][i] = FIXR(0.0);
- mdct_win[3][6 + i] = FIXR(sin(M_PI * (i + 0.5) / 12.0));
- mdct_win[3][12 + i] = FIXR(1.0);
+ for(j=0; j<4; j++){
+ double d;
+
+ if(j==2 && i%3 != 1)
+ continue;
+
+ d= sin(M_PI * (i + 0.5) / 36.0);
+ if(j==1){
+ if (i>=30) d= 0;
+ else if(i>=24) d= sin(M_PI * (i - 18 + 0.5) / 12.0);
+ else if(i>=18) d= 1;
+ }else if(j==3){
+ if (i< 6) d= 0;
+ else if(i< 12) d= sin(M_PI * (i - 6 + 0.5) / 12.0);
+ else if(i< 18) d= 1;
+ }
+ //merge last stage of imdct into the window coefficients
+ d*= 0.5 / cos(M_PI*(2*i + 19)/72);
+
+ if(j==2)
+ mdct_win[j][i/3] = FIXHR((d / (1<<5)));
+ else
+ mdct_win[j][i ] = FIXHR((d / (1<<5)));
+// av_log(NULL, AV_LOG_DEBUG, "%2d %d %f\n", i,j,d / (1<<5));
+ }
}
- for(i=0;i<12;i++)
- mdct_win[2][i] = FIXR(sin(M_PI * (i + 0.5) / 12.0));
-
/* NOTE: we do frequency inversion adter the MDCT by changing
the sign of the right window coefs */
for(j=0;j<4;j++) {
#if defined(DEBUG)
for(j=0;j<8;j++) {
- printf("win%d=\n", j);
+ av_log(avctx, AV_LOG_DEBUG, "win%d=\n", j);
for(i=0;i<36;i++)
- printf("%f, ", (double)mdct_win[j][i] / FRAC_ONE);
- printf("\n");
+ av_log(avctx, AV_LOG_DEBUG, "%f, ", (double)mdct_win[j][i] / FRAC_ONE);
+ av_log(avctx, AV_LOG_DEBUG, "\n");
}
#endif
init = 1;
#ifdef DEBUG
s->frame_count = 0;
#endif
+ if (avctx->codec_id == CODEC_ID_MP3ADU)
+ s->adu_mode = 1;
return 0;
}
-/* tab[i][j] = 1.0 / (2.0 * cos(pi*(2*k+1) / 2^(6 - j))) */;
+/* tab[i][j] = 1.0 / (2.0 * cos(pi*(2*k+1) / 2^(6 - j))) */
/* cos(i*pi/64) */
#define ADD(a, b) tab[a] += tab[b]
/* DCT32 without 1/sqrt(2) coef zero scaling. */
-static void dct32(INT32 *out, INT32 *tab)
+static void dct32(int32_t *out, int32_t *tab)
{
int tmp0, tmp1;
BF(5, 10, COS1_5);
BF(6, 9, COS1_6);
BF(7, 8, COS1_7);
-
+
BF(16, 31, -COS1_0);
BF(17, 30, -COS1_1);
BF(18, 29, -COS1_2);
BF(21, 26, -COS1_5);
BF(22, 25, -COS1_6);
BF(23, 24, -COS1_7);
-
+
/* pass 3 */
BF(0, 7, COS2_0);
BF(1, 6, COS2_1);
BF(2, 5, COS2_2);
BF(3, 4, COS2_3);
-
+
BF(8, 15, -COS2_0);
BF(9, 14, -COS2_1);
BF(10, 13, -COS2_2);
BF(11, 12, -COS2_3);
-
+
BF(16, 23, COS2_0);
BF(17, 22, COS2_1);
BF(18, 21, COS2_2);
BF(19, 20, COS2_3);
-
+
BF(24, 31, -COS2_0);
BF(25, 30, -COS2_1);
BF(26, 29, -COS2_2);
/* pass 4 */
BF(0, 3, COS3_0);
BF(1, 2, COS3_1);
-
+
BF(4, 7, -COS3_0);
BF(5, 6, -COS3_1);
-
+
BF(8, 11, COS3_0);
BF(9, 10, COS3_1);
-
+
BF(12, 15, -COS3_0);
BF(13, 14, -COS3_1);
-
+
BF(16, 19, COS3_0);
BF(17, 18, COS3_1);
-
+
BF(20, 23, -COS3_0);
BF(21, 22, -COS3_1);
-
+
BF(24, 27, COS3_0);
BF(25, 26, COS3_1);
-
+
BF(28, 31, -COS3_0);
BF(29, 30, -COS3_1);
-
+
/* pass 5 */
BF1(0, 1, 2, 3);
BF2(4, 5, 6, 7);
BF2(20, 21, 22, 23);
BF1(24, 25, 26, 27);
BF2(28, 29, 30, 31);
-
+
/* pass 6 */
-
+
ADD( 8, 12);
ADD(12, 10);
ADD(10, 14);
out[22] = tab[13];
out[14] = tab[14];
out[30] = tab[15];
-
+
ADD(24, 28);
ADD(28, 26);
ADD(26, 30);
out[31] = tab[31];
}
-#define OUT_SHIFT (WFRAC_BITS + FRAC_BITS - 15)
-
#if FRAC_BITS <= 15
-#define OUT_SAMPLE(sum)\
-{\
- int sum1;\
- sum1 = (sum + (1 << (OUT_SHIFT - 1))) >> OUT_SHIFT;\
- if (sum1 < -32768)\
- sum1 = -32768;\
- else if (sum1 > 32767)\
- sum1 = 32767;\
- *samples = sum1;\
- samples += incr;\
+static inline int round_sample(int *sum)
+{
+ int sum1;
+ sum1 = (*sum) >> OUT_SHIFT;
+ *sum &= (1<<OUT_SHIFT)-1;
+ if (sum1 < OUT_MIN)
+ sum1 = OUT_MIN;
+ else if (sum1 > OUT_MAX)
+ sum1 = OUT_MAX;
+ return sum1;
}
-#define SUM8(off, op) \
-{ \
- sum op w[0 * 64 + off] * p[0 * 64];\
- sum op w[1 * 64 + off] * p[1 * 64];\
- sum op w[2 * 64 + off] * p[2 * 64];\
- sum op w[3 * 64 + off] * p[3 * 64];\
- sum op w[4 * 64 + off] * p[4 * 64];\
- sum op w[5 * 64 + off] * p[5 * 64];\
- sum op w[6 * 64 + off] * p[6 * 64];\
- sum op w[7 * 64 + off] * p[7 * 64];\
-}
+#if defined(ARCH_POWERPC_405)
+
+/* signed 16x16 -> 32 multiply add accumulate */
+#define MACS(rt, ra, rb) \
+ asm ("maclhw %0, %2, %3" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb));
+
+/* signed 16x16 -> 32 multiply */
+#define MULS(ra, rb) \
+ ({ int __rt; asm ("mullhw %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); __rt; })
#else
-#define OUT_SAMPLE(sum)\
-{\
- int sum1;\
- sum1 = (int)((sum + (INT64_C(1) << (OUT_SHIFT - 1))) >> OUT_SHIFT);\
- if (sum1 < -32768)\
- sum1 = -32768;\
- else if (sum1 > 32767)\
- sum1 = 32767;\
- *samples = sum1;\
- samples += incr;\
+/* signed 16x16 -> 32 multiply add accumulate */
+#define MACS(rt, ra, rb) rt += (ra) * (rb)
+
+/* signed 16x16 -> 32 multiply */
+#define MULS(ra, rb) ((ra) * (rb))
+
+#endif
+
+#else
+
+static inline int round_sample(int64_t *sum)
+{
+ int sum1;
+ sum1 = (int)((*sum) >> OUT_SHIFT);
+ *sum &= (1<<OUT_SHIFT)-1;
+ if (sum1 < OUT_MIN)
+ sum1 = OUT_MIN;
+ else if (sum1 > OUT_MAX)
+ sum1 = OUT_MAX;
+ return sum1;
}
-#define SUM8(off, op) \
+#define MULS(ra, rb) MUL64(ra, rb)
+
+#endif
+
+#define SUM8(sum, op, w, p) \
+{ \
+ sum op MULS((w)[0 * 64], p[0 * 64]);\
+ sum op MULS((w)[1 * 64], p[1 * 64]);\
+ sum op MULS((w)[2 * 64], p[2 * 64]);\
+ sum op MULS((w)[3 * 64], p[3 * 64]);\
+ sum op MULS((w)[4 * 64], p[4 * 64]);\
+ sum op MULS((w)[5 * 64], p[5 * 64]);\
+ sum op MULS((w)[6 * 64], p[6 * 64]);\
+ sum op MULS((w)[7 * 64], p[7 * 64]);\
+}
+
+#define SUM8P2(sum1, op1, sum2, op2, w1, w2, p) \
{ \
- sum op MUL64(w[0 * 64 + off], p[0 * 64]);\
- sum op MUL64(w[1 * 64 + off], p[1 * 64]);\
- sum op MUL64(w[2 * 64 + off], p[2 * 64]);\
- sum op MUL64(w[3 * 64 + off], p[3 * 64]);\
- sum op MUL64(w[4 * 64 + off], p[4 * 64]);\
- sum op MUL64(w[5 * 64 + off], p[5 * 64]);\
- sum op MUL64(w[6 * 64 + off], p[6 * 64]);\
- sum op MUL64(w[7 * 64 + off], p[7 * 64]);\
+ int tmp;\
+ tmp = p[0 * 64];\
+ sum1 op1 MULS((w1)[0 * 64], tmp);\
+ sum2 op2 MULS((w2)[0 * 64], tmp);\
+ tmp = p[1 * 64];\
+ sum1 op1 MULS((w1)[1 * 64], tmp);\
+ sum2 op2 MULS((w2)[1 * 64], tmp);\
+ tmp = p[2 * 64];\
+ sum1 op1 MULS((w1)[2 * 64], tmp);\
+ sum2 op2 MULS((w2)[2 * 64], tmp);\
+ tmp = p[3 * 64];\
+ sum1 op1 MULS((w1)[3 * 64], tmp);\
+ sum2 op2 MULS((w2)[3 * 64], tmp);\
+ tmp = p[4 * 64];\
+ sum1 op1 MULS((w1)[4 * 64], tmp);\
+ sum2 op2 MULS((w2)[4 * 64], tmp);\
+ tmp = p[5 * 64];\
+ sum1 op1 MULS((w1)[5 * 64], tmp);\
+ sum2 op2 MULS((w2)[5 * 64], tmp);\
+ tmp = p[6 * 64];\
+ sum1 op1 MULS((w1)[6 * 64], tmp);\
+ sum2 op2 MULS((w2)[6 * 64], tmp);\
+ tmp = p[7 * 64];\
+ sum1 op1 MULS((w1)[7 * 64], tmp);\
+ sum2 op2 MULS((w2)[7 * 64], tmp);\
}
+void ff_mpa_synth_init(MPA_INT *window)
+{
+ int i;
+
+ /* max = 18760, max sum over all 16 coefs : 44736 */
+ for(i=0;i<257;i++) {
+ int v;
+ v = mpa_enwindow[i];
+#if WFRAC_BITS < 16
+ v = (v + (1 << (16 - WFRAC_BITS - 1))) >> (16 - WFRAC_BITS);
#endif
+ window[i] = v;
+ if ((i & 63) != 0)
+ v = -v;
+ if (i != 0)
+ window[512 - i] = v;
+ }
+}
/* 32 sub band synthesis filter. Input: 32 sub band samples, Output:
32 samples. */
/* XXX: optimize by avoiding ring buffer usage */
-static void synth_filter(MPADecodeContext *s1,
- int ch, INT16 *samples, int incr,
- INT32 sb_samples[SBLIMIT])
+void ff_mpa_synth_filter(MPA_INT *synth_buf_ptr, int *synth_buf_offset,
+ MPA_INT *window, int *dither_state,
+ OUT_INT *samples, int incr,
+ int32_t sb_samples[SBLIMIT])
{
- INT32 tmp[32];
- register MPA_INT *synth_buf, *p;
- register MPA_INT *w;
+ int32_t tmp[32];
+ register MPA_INT *synth_buf;
+ register const MPA_INT *w, *w2, *p;
int j, offset, v;
+ OUT_INT *samples2;
#if FRAC_BITS <= 15
- int sum;
+ int sum, sum2;
#else
- INT64 sum;
+ int64_t sum, sum2;
#endif
dct32(tmp, sb_samples);
-
- offset = s1->synth_buf_offset[ch];
- synth_buf = s1->synth_buf[ch] + offset;
+
+ offset = *synth_buf_offset;
+ synth_buf = synth_buf_ptr + offset;
for(j=0;j<32;j++) {
v = tmp[j];
#if FRAC_BITS <= 15
+ /* NOTE: can cause a loss in precision if very high amplitude
+ sound */
if (v > 32767)
v = 32767;
else if (v < -32768)
/* copy to avoid wrap */
memcpy(synth_buf + 512, synth_buf, 32 * sizeof(MPA_INT));
+ samples2 = samples + 31 * incr;
w = window;
- for(j=0;j<16;j++) {
- sum = 0;
- p = synth_buf + 16 + j; /* 0-15 */
- SUM8(0, +=);
- p = synth_buf + 48 - j; /* 32-47 */
- SUM8(32, -=);
- OUT_SAMPLE(sum);
- w++;
- }
-
- p = synth_buf + 32; /* 48 */
- sum = 0;
- SUM8(32, -=);
- OUT_SAMPLE(sum);
+ w2 = window + 31;
+
+ sum = *dither_state;
+ p = synth_buf + 16;
+ SUM8(sum, +=, w, p);
+ p = synth_buf + 48;
+ SUM8(sum, -=, w + 32, p);
+ *samples = round_sample(&sum);
+ samples += incr;
w++;
- for(j=17;j<32;j++) {
- sum = 0;
- p = synth_buf + 48 - j; /* 17-31 */
- SUM8(0, -=);
- p = synth_buf + 16 + j; /* 49-63 */
- SUM8(32, -=);
- OUT_SAMPLE(sum);
+ /* we calculate two samples at the same time to avoid one memory
+ access per two sample */
+ for(j=1;j<16;j++) {
+ sum2 = 0;
+ p = synth_buf + 16 + j;
+ SUM8P2(sum, +=, sum2, -=, w, w2, p);
+ p = synth_buf + 48 - j;
+ SUM8P2(sum, -=, sum2, -=, w + 32, w2 + 32, p);
+
+ *samples = round_sample(&sum);
+ samples += incr;
+ sum += sum2;
+ *samples2 = round_sample(&sum);
+ samples2 -= incr;
w++;
+ w2--;
}
- offset = (offset - 32) & 511;
- s1->synth_buf_offset[ch] = offset;
-}
-/* cos(pi*i/24) */
-#define C1 FIXR(0.99144486137381041114)
-#define C3 FIXR(0.92387953251128675612)
-#define C5 FIXR(0.79335334029123516458)
-#define C7 FIXR(0.60876142900872063941)
-#define C9 FIXR(0.38268343236508977173)
-#define C11 FIXR(0.13052619222005159154)
+ p = synth_buf + 32;
+ SUM8(sum, -=, w + 32, p);
+ *samples = round_sample(&sum);
+ *dither_state= sum;
-/* 12 points IMDCT. We compute it "by hand" by factorizing obvious
- cases. */
-static void imdct12(int *out, int *in)
-{
- int tmp;
- INT64 in1_3, in1_9, in4_3, in4_9;
-
- in1_3 = MUL64(in[1], C3);
- in1_9 = MUL64(in[1], C9);
- in4_3 = MUL64(in[4], C3);
- in4_9 = MUL64(in[4], C9);
-
- tmp = FRAC_RND(MUL64(in[0], C7) - in1_3 - MUL64(in[2], C11) +
- MUL64(in[3], C1) - in4_9 - MUL64(in[5], C5));
- out[0] = tmp;
- out[5] = -tmp;
- tmp = FRAC_RND(MUL64(in[0] - in[3], C9) - in1_3 +
- MUL64(in[2] + in[5], C3) - in4_9);
- out[1] = tmp;
- out[4] = -tmp;
- tmp = FRAC_RND(MUL64(in[0], C11) - in1_9 + MUL64(in[2], C7) -
- MUL64(in[3], C5) + in4_3 - MUL64(in[5], C1));
- out[2] = tmp;
- out[3] = -tmp;
- tmp = FRAC_RND(MUL64(-in[0], C5) + in1_9 + MUL64(in[2], C1) +
- MUL64(in[3], C11) - in4_3 - MUL64(in[5], C7));
- out[6] = tmp;
- out[11] = tmp;
- tmp = FRAC_RND(MUL64(-in[0] + in[3], C3) - in1_9 +
- MUL64(in[2] + in[5], C9) + in4_3);
- out[7] = tmp;
- out[10] = tmp;
- tmp = FRAC_RND(-MUL64(in[0], C1) - in1_3 - MUL64(in[2], C5) -
- MUL64(in[3], C7) - in4_9 - MUL64(in[5], C11));
- out[8] = tmp;
- out[9] = tmp;
+ offset = (offset - 32) & 511;
+ *synth_buf_offset = offset;
}
-#undef C1
-#undef C3
-#undef C5
-#undef C7
-#undef C9
-#undef C11
-
-/* cos(pi*i/18) */
-#define C1 FIXR(0.98480775301220805936)
-#define C2 FIXR(0.93969262078590838405)
-#define C3 FIXR(0.86602540378443864676)
-#define C4 FIXR(0.76604444311897803520)
-#define C5 FIXR(0.64278760968653932632)
-#define C6 FIXR(0.5)
-#define C7 FIXR(0.34202014332566873304)
-#define C8 FIXR(0.17364817766693034885)
+#define C3 FIXHR(0.86602540378443864676/2)
/* 0.5 / cos(pi*(2*i+1)/36) */
static const int icos36[9] = {
FIXR(0.50190991877167369479),
- FIXR(0.51763809020504152469),
+ FIXR(0.51763809020504152469), //0
FIXR(0.55168895948124587824),
FIXR(0.61038729438072803416),
- FIXR(0.70710678118654752439),
+ FIXR(0.70710678118654752439), //1
FIXR(0.87172339781054900991),
FIXR(1.18310079157624925896),
- FIXR(1.93185165257813657349),
+ FIXR(1.93185165257813657349), //2
FIXR(5.73685662283492756461),
};
-static const int icos72[18] = {
- /* 0.5 / cos(pi*(2*i+19)/72) */
- FIXR(0.74009361646113053152),
- FIXR(0.82133981585229078570),
- FIXR(0.93057949835178895673),
- FIXR(1.08284028510010010928),
- FIXR(1.30656296487637652785),
- FIXR(1.66275476171152078719),
- FIXR(2.31011315767264929558),
- FIXR(3.83064878777019433457),
- FIXR(11.46279281302667383546),
-
- /* 0.5 / cos(pi*(2*(i + 18) +19)/72) */
- FIXR(-0.67817085245462840086),
- FIXR(-0.63023620700513223342),
- FIXR(-0.59284452371708034528),
- FIXR(-0.56369097343317117734),
- FIXR(-0.54119610014619698439),
- FIXR(-0.52426456257040533932),
- FIXR(-0.51213975715725461845),
- FIXR(-0.50431448029007636036),
- FIXR(-0.50047634258165998492),
-};
+/* 12 points IMDCT. We compute it "by hand" by factorizing obvious
+ cases. */
+static void imdct12(int *out, int *in)
+{
+ int in0, in1, in2, in3, in4, in5, t1, t2;
+
+ in0= in[0*3];
+ in1= in[1*3] + in[0*3];
+ in2= in[2*3] + in[1*3];
+ in3= in[3*3] + in[2*3];
+ in4= in[4*3] + in[3*3];
+ in5= in[5*3] + in[4*3];
+ in5 += in3;
+ in3 += in1;
+
+ in2= MULH(2*in2, C3);
+ in3= MULH(2*in3, C3);
+
+ t1 = in0 - in4;
+ t2 = MULL(in1 - in5, icos36[4]);
+
+ out[ 7]=
+ out[10]= t1 + t2;
+ out[ 1]=
+ out[ 4]= t1 - t2;
+
+ in0 += in4>>1;
+ in4 = in0 + in2;
+ in1 += in5>>1;
+ in5 = MULL(in1 + in3, icos36[1]);
+ out[ 8]=
+ out[ 9]= in4 + in5;
+ out[ 2]=
+ out[ 3]= in4 - in5;
+
+ in0 -= in2;
+ in1 = MULL(in1 - in3, icos36[7]);
+ out[ 0]=
+ out[ 5]= in0 - in1;
+ out[ 6]=
+ out[11]= in0 + in1;
+}
+
+/* cos(pi*i/18) */
+#define C1 FIXHR(0.98480775301220805936/2)
+#define C2 FIXHR(0.93969262078590838405/2)
+#define C3 FIXHR(0.86602540378443864676/2)
+#define C4 FIXHR(0.76604444311897803520/2)
+#define C5 FIXHR(0.64278760968653932632/2)
+#define C6 FIXHR(0.5/2)
+#define C7 FIXHR(0.34202014332566873304/2)
+#define C8 FIXHR(0.17364817766693034885/2)
+
/* using Lee like decomposition followed by hand coded 9 points DCT */
-static void imdct36(int *out, int *in)
+static void imdct36(int *out, int *buf, int *in, int *win)
{
int i, j, t0, t1, t2, t3, s0, s1, s2, s3;
int tmp[18], *tmp1, *in1;
- INT64 in3_3, in6_6;
for(i=17;i>=1;i--)
in[i] += in[i-1];
for(j=0;j<2;j++) {
tmp1 = tmp + j;
in1 = in + j;
+#if 0
+//more accurate but slower
+ int64_t t0, t1, t2, t3;
+ t2 = in1[2*4] + in1[2*8] - in1[2*2];
+
+ t3 = (in1[2*0] + (int64_t)(in1[2*6]>>1))<<32;
+ t1 = in1[2*0] - in1[2*6];
+ tmp1[ 6] = t1 - (t2>>1);
+ tmp1[16] = t1 + t2;
+
+ t0 = MUL64(2*(in1[2*2] + in1[2*4]), C2);
+ t1 = MUL64( in1[2*4] - in1[2*8] , -2*C8);
+ t2 = MUL64(2*(in1[2*2] + in1[2*8]), -C4);
+
+ tmp1[10] = (t3 - t0 - t2) >> 32;
+ tmp1[ 2] = (t3 + t0 + t1) >> 32;
+ tmp1[14] = (t3 + t2 - t1) >> 32;
+
+ tmp1[ 4] = MULH(2*(in1[2*5] + in1[2*7] - in1[2*1]), -C3);
+ t2 = MUL64(2*(in1[2*1] + in1[2*5]), C1);
+ t3 = MUL64( in1[2*5] - in1[2*7] , -2*C7);
+ t0 = MUL64(2*in1[2*3], C3);
+
+ t1 = MUL64(2*(in1[2*1] + in1[2*7]), -C5);
+
+ tmp1[ 0] = (t2 + t3 + t0) >> 32;
+ tmp1[12] = (t2 + t1 - t0) >> 32;
+ tmp1[ 8] = (t3 - t1 - t0) >> 32;
+#else
+ t2 = in1[2*4] + in1[2*8] - in1[2*2];
+
+ t3 = in1[2*0] + (in1[2*6]>>1);
+ t1 = in1[2*0] - in1[2*6];
+ tmp1[ 6] = t1 - (t2>>1);
+ tmp1[16] = t1 + t2;
+
+ t0 = MULH(2*(in1[2*2] + in1[2*4]), C2);
+ t1 = MULH( in1[2*4] - in1[2*8] , -2*C8);
+ t2 = MULH(2*(in1[2*2] + in1[2*8]), -C4);
+
+ tmp1[10] = t3 - t0 - t2;
+ tmp1[ 2] = t3 + t0 + t1;
+ tmp1[14] = t3 + t2 - t1;
- in3_3 = MUL64(in1[2*3], C3);
- in6_6 = MUL64(in1[2*6], C6);
-
- tmp1[0] = FRAC_RND(MUL64(in1[2*1], C1) + in3_3 +
- MUL64(in1[2*5], C5) + MUL64(in1[2*7], C7));
- tmp1[2] = in1[2*0] + FRAC_RND(MUL64(in1[2*2], C2) +
- MUL64(in1[2*4], C4) + in6_6 +
- MUL64(in1[2*8], C8));
- tmp1[4] = FRAC_RND(MUL64(in1[2*1] - in1[2*5] - in1[2*7], C3));
- tmp1[6] = FRAC_RND(MUL64(in1[2*2] - in1[2*4] - in1[2*8], C6)) -
- in1[2*6] + in1[2*0];
- tmp1[8] = FRAC_RND(MUL64(in1[2*1], C5) - in3_3 -
- MUL64(in1[2*5], C7) + MUL64(in1[2*7], C1));
- tmp1[10] = in1[2*0] + FRAC_RND(MUL64(-in1[2*2], C8) -
- MUL64(in1[2*4], C2) + in6_6 +
- MUL64(in1[2*8], C4));
- tmp1[12] = FRAC_RND(MUL64(in1[2*1], C7) - in3_3 +
- MUL64(in1[2*5], C1) -
- MUL64(in1[2*7], C5));
- tmp1[14] = in1[2*0] + FRAC_RND(MUL64(-in1[2*2], C4) +
- MUL64(in1[2*4], C8) + in6_6 -
- MUL64(in1[2*8], C2));
- tmp1[16] = in1[2*0] - in1[2*2] + in1[2*4] - in1[2*6] + in1[2*8];
+ tmp1[ 4] = MULH(2*(in1[2*5] + in1[2*7] - in1[2*1]), -C3);
+ t2 = MULH(2*(in1[2*1] + in1[2*5]), C1);
+ t3 = MULH( in1[2*5] - in1[2*7] , -2*C7);
+ t0 = MULH(2*in1[2*3], C3);
+
+ t1 = MULH(2*(in1[2*1] + in1[2*7]), -C5);
+
+ tmp1[ 0] = t2 + t3 + t0;
+ tmp1[12] = t2 + t1 - t0;
+ tmp1[ 8] = t3 - t1 - t0;
+#endif
}
i = 0;
t3 = tmp[i + 3];
s1 = MULL(t3 + t2, icos36[j]);
s3 = MULL(t3 - t2, icos36[8 - j]);
-
- t0 = MULL(s0 + s1, icos72[9 + 8 - j]);
- t1 = MULL(s0 - s1, icos72[8 - j]);
- out[18 + 9 + j] = t0;
- out[18 + 8 - j] = t0;
- out[9 + j] = -t1;
- out[8 - j] = t1;
-
- t0 = MULL(s2 + s3, icos72[9+j]);
- t1 = MULL(s2 - s3, icos72[j]);
- out[18 + 9 + (8 - j)] = t0;
- out[18 + j] = t0;
- out[9 + (8 - j)] = -t1;
- out[j] = t1;
+
+ t0 = s0 + s1;
+ t1 = s0 - s1;
+ out[(9 + j)*SBLIMIT] = MULH(t1, win[9 + j]) + buf[9 + j];
+ out[(8 - j)*SBLIMIT] = MULH(t1, win[8 - j]) + buf[8 - j];
+ buf[9 + j] = MULH(t0, win[18 + 9 + j]);
+ buf[8 - j] = MULH(t0, win[18 + 8 - j]);
+
+ t0 = s2 + s3;
+ t1 = s2 - s3;
+ out[(9 + 8 - j)*SBLIMIT] = MULH(t1, win[9 + 8 - j]) + buf[9 + 8 - j];
+ out[( j)*SBLIMIT] = MULH(t1, win[ j]) + buf[ j];
+ buf[9 + 8 - j] = MULH(t0, win[18 + 9 + 8 - j]);
+ buf[ + j] = MULH(t0, win[18 + j]);
i += 4;
}
s0 = tmp[16];
s1 = MULL(tmp[17], icos36[4]);
- t0 = MULL(s0 + s1, icos72[9 + 4]);
- t1 = MULL(s0 - s1, icos72[4]);
- out[18 + 9 + 4] = t0;
- out[18 + 8 - 4] = t0;
- out[9 + 4] = -t1;
- out[8 - 4] = t1;
-}
-
-/* fast header check for resync */
-static int check_header(UINT32 header)
-{
- /* header */
- if ((header & 0xffe00000) != 0xffe00000)
- return -1;
- /* layer check */
- if (((header >> 17) & 3) == 0)
- return -1;
- /* bit rate */
- if (((header >> 12) & 0xf) == 0xf)
- return -1;
- /* frequency */
- if (((header >> 10) & 3) == 3)
- return -1;
- return 0;
+ t0 = s0 + s1;
+ t1 = s0 - s1;
+ out[(9 + 4)*SBLIMIT] = MULH(t1, win[9 + 4]) + buf[9 + 4];
+ out[(8 - 4)*SBLIMIT] = MULH(t1, win[8 - 4]) + buf[8 - 4];
+ buf[9 + 4] = MULH(t0, win[18 + 9 + 4]);
+ buf[8 - 4] = MULH(t0, win[18 + 8 - 4]);
}
-/* header + layer + bitrate + freq + lsf/mpeg25 */
-#define SAME_HEADER_MASK \
- (0xffe00000 | (3 << 17) | (0xf << 12) | (3 << 10) | (3 << 19))
-
/* header decoding. MUST check the header before because no
consistency check is done there. Return 1 if free format found and
that the frame size must be computed externally */
-static int decode_header(MPADecodeContext *s, UINT32 header)
+static int decode_header(MPADecodeContext *s, uint32_t header)
{
int sample_rate, frame_size, mpeg25, padding;
int sample_rate_index, bitrate_index;
s->lsf = 1;
mpeg25 = 1;
}
-
+
s->layer = 4 - ((header >> 17) & 3);
/* extract frequency */
sample_rate_index = (header >> 10) & 3;
sample_rate = mpa_freq_tab[sample_rate_index] >> (s->lsf + mpeg25);
- if (sample_rate == 0)
- return 1;
sample_rate_index += 3 * (s->lsf + mpeg25);
s->sample_rate_index = sample_rate_index;
s->error_protection = ((header >> 16) & 1) ^ 1;
+ s->sample_rate = sample_rate;
bitrate_index = (header >> 12) & 0xf;
padding = (header >> 9) & 1;
s->nb_channels = 1;
else
s->nb_channels = 2;
-
+
if (bitrate_index != 0) {
frame_size = mpa_bitrate_tab[s->lsf][s->layer - 1][bitrate_index];
s->bit_rate = frame_size * 1000;
break;
}
}
- s->sample_rate = sample_rate;
-
+
#if defined(DEBUG)
- printf("layer%d, %d Hz, %d kbits/s, ",
+ dprintf("layer%d, %d Hz, %d kbits/s, ",
s->layer, s->sample_rate, s->bit_rate);
if (s->nb_channels == 2) {
if (s->layer == 3) {
if (s->mode_ext & MODE_EXT_MS_STEREO)
- printf("ms-");
+ dprintf("ms-");
if (s->mode_ext & MODE_EXT_I_STEREO)
- printf("i-");
+ dprintf("i-");
}
- printf("stereo");
+ dprintf("stereo");
} else {
- printf("mono");
+ dprintf("mono");
}
- printf("\n");
+ dprintf("\n");
#endif
return 0;
}
+/* useful helper to get mpeg audio stream infos. Return -1 if error in
+ header, otherwise the coded frame size in bytes */
+int mpa_decode_header(AVCodecContext *avctx, uint32_t head)
+{
+ MPADecodeContext s1, *s = &s1;
+ memset( s, 0, sizeof(MPADecodeContext) );
+
+ if (ff_mpa_check_header(head) != 0)
+ return -1;
+
+ if (decode_header(s, head) != 0) {
+ return -1;
+ }
+
+ switch(s->layer) {
+ case 1:
+ avctx->frame_size = 384;
+ break;
+ case 2:
+ avctx->frame_size = 1152;
+ break;
+ default:
+ case 3:
+ if (s->lsf)
+ avctx->frame_size = 576;
+ else
+ avctx->frame_size = 1152;
+ break;
+ }
+
+ avctx->sample_rate = s->sample_rate;
+ avctx->channels = s->nb_channels;
+ avctx->bit_rate = s->bit_rate;
+ avctx->sub_id = s->layer;
+ return s->frame_size;
+}
+
/* return the number of decoded frames */
static int mp_decode_layer1(MPADecodeContext *s)
{
int bound, i, v, n, ch, j, mant;
- UINT8 allocation[MPA_MAX_CHANNELS][SBLIMIT];
- UINT8 scale_factors[MPA_MAX_CHANNELS][SBLIMIT];
+ uint8_t allocation[MPA_MAX_CHANNELS][SBLIMIT];
+ uint8_t scale_factors[MPA_MAX_CHANNELS][SBLIMIT];
- if (s->mode == MPA_JSTEREO)
+ if (s->mode == MPA_JSTEREO)
bound = (s->mode_ext + 1) * 4;
else
bound = SBLIMIT;
scale_factors[1][i] = get_bits(&s->gb, 6);
}
}
-
+
/* compute samples */
for(j=0;j<12;j++) {
for(i=0;i<bound;i++) {
int l2_select_table(int bitrate, int nb_channels, int freq, int lsf)
{
int ch_bitrate, table;
-
+
ch_bitrate = bitrate / nb_channels;
if (!lsf) {
if ((freq == 48000 && ch_bitrate >= 56) ||
- (ch_bitrate >= 56 && ch_bitrate <= 80))
+ (ch_bitrate >= 56 && ch_bitrate <= 80))
table = 0;
- else if (freq != 48000 && ch_bitrate >= 96)
+ else if (freq != 48000 && ch_bitrate >= 96)
table = 1;
- else if (freq != 32000 && ch_bitrate <= 48)
+ else if (freq != 32000 && ch_bitrate <= 48)
table = 2;
- else
+ else
table = 3;
} else {
table = 4;
int scale, qindex, bits, steps, k, l, m, b;
/* select decoding table */
- table = l2_select_table(s->bit_rate / 1000, s->nb_channels,
+ table = l2_select_table(s->bit_rate / 1000, s->nb_channels,
s->sample_rate, s->lsf);
sblimit = sblimit_table[table];
alloc_table = alloc_tables[table];
- if (s->mode == MPA_JSTEREO)
+ if (s->mode == MPA_JSTEREO)
bound = (s->mode_ext + 1) * 4;
else
bound = sblimit;
dprintf("bound=%d sblimit=%d\n", bound, sblimit);
+
+ /* sanity check */
+ if( bound > sblimit ) bound = sblimit;
+
/* parse bit allocation */
j = 0;
for(i=0;i<bound;i++) {
{
for(ch=0;ch<s->nb_channels;ch++) {
for(i=0;i<sblimit;i++)
- printf(" %d", bit_alloc[ch][i]);
- printf("\n");
+ dprintf(" %d", bit_alloc[ch][i]);
+ dprintf("\n");
}
}
#endif
/* scale codes */
for(i=0;i<sblimit;i++) {
for(ch=0;ch<s->nb_channels;ch++) {
- if (bit_alloc[ch][i])
+ if (bit_alloc[ch][i])
scale_code[ch][i] = get_bits(&s->gb, 2);
}
}
-
+
/* scale factors */
for(i=0;i<sblimit;i++) {
for(ch=0;ch<s->nb_channels;ch++) {
for(i=0;i<sblimit;i++) {
if (bit_alloc[ch][i]) {
sf = scale_factors[ch][i];
- printf(" %d %d %d", sf[0], sf[1], sf[2]);
+ dprintf(" %d %d %d", sf[0], sf[1], sf[2]);
} else {
- printf(" -");
+ dprintf(" -");
}
}
- printf("\n");
+ dprintf("\n");
}
#endif
/* 3 values at the same time */
v = get_bits(&s->gb, -bits);
steps = quant_steps[qindex];
- s->sb_samples[ch][k * 12 + l + 0][i] =
+ s->sb_samples[ch][k * 12 + l + 0][i] =
l2_unscale_group(steps, v % steps, scale);
v = v / steps;
- s->sb_samples[ch][k * 12 + l + 1][i] =
+ s->sb_samples[ch][k * 12 + l + 1][i] =
l2_unscale_group(steps, v % steps, scale);
v = v / steps;
- s->sb_samples[ch][k * 12 + l + 2][i] =
+ s->sb_samples[ch][k * 12 + l + 2][i] =
l2_unscale_group(steps, v, scale);
} else {
for(m=0;m<3;m++) {
}
}
/* next subband in alloc table */
- j += 1 << bit_alloc_bits;
+ j += 1 << bit_alloc_bits;
}
/* XXX: find a way to avoid this duplication of code */
for(i=bound;i<sblimit;i++) {
steps = quant_steps[qindex];
mant = v % steps;
v = v / steps;
- s->sb_samples[0][k * 12 + l + 0][i] =
+ s->sb_samples[0][k * 12 + l + 0][i] =
l2_unscale_group(steps, mant, scale0);
- s->sb_samples[1][k * 12 + l + 0][i] =
+ s->sb_samples[1][k * 12 + l + 0][i] =
l2_unscale_group(steps, mant, scale1);
mant = v % steps;
v = v / steps;
- s->sb_samples[0][k * 12 + l + 1][i] =
+ s->sb_samples[0][k * 12 + l + 1][i] =
l2_unscale_group(steps, mant, scale0);
- s->sb_samples[1][k * 12 + l + 1][i] =
+ s->sb_samples[1][k * 12 + l + 1][i] =
l2_unscale_group(steps, mant, scale1);
- s->sb_samples[0][k * 12 + l + 2][i] =
+ s->sb_samples[0][k * 12 + l + 2][i] =
l2_unscale_group(steps, v, scale0);
- s->sb_samples[1][k * 12 + l + 2][i] =
+ s->sb_samples[1][k * 12 + l + 2][i] =
l2_unscale_group(steps, v, scale1);
} else {
for(m=0;m<3;m++) {
mant = get_bits(&s->gb, bits);
- s->sb_samples[0][k * 12 + l + m][i] =
+ s->sb_samples[0][k * 12 + l + m][i] =
l1_unscale(bits - 1, mant, scale0);
- s->sb_samples[1][k * 12 + l + m][i] =
+ s->sb_samples[1][k * 12 + l + m][i] =
l1_unscale(bits - 1, mant, scale1);
}
}
s->sb_samples[1][k * 12 + l + 2][i] = 0;
}
/* next subband in alloc table */
- j += 1 << bit_alloc_bits;
+ j += 1 << bit_alloc_bits;
}
/* fill remaining samples to zero */
for(i=sblimit;i<SBLIMIT;i++) {
/*
* Seek back in the stream for backstep bytes (at most 511 bytes)
*/
-static void seek_to_maindata(MPADecodeContext *s, long backstep)
+static void seek_to_maindata(MPADecodeContext *s, unsigned int backstep)
{
- UINT8 *ptr;
+ uint8_t *ptr;
/* compute current position in stream */
-#ifdef ALT_BITSTREAM_READER
- ptr = s->gb.buffer + (s->gb.index>>3);
-#else
- ptr = s->gb.buf_ptr - (s->gb.bit_cnt >> 3);
-#endif
+ ptr = (uint8_t *)(s->gb.buffer + (get_bits_count(&s->gb)>>3));
+
/* copy old data before current one */
ptr -= backstep;
- memcpy(ptr, s->inbuf1[s->inbuf_index ^ 1] +
+ memcpy(ptr, s->inbuf1[s->inbuf_index ^ 1] +
BACKSTEP_SIZE + s->old_frame_size - backstep, backstep);
/* init get bits again */
- init_get_bits(&s->gb, ptr, s->frame_size + backstep);
+ init_get_bits(&s->gb, ptr, (s->frame_size + backstep)*8);
/* prepare next buffer */
s->inbuf_index ^= 1;
slen[0] = sf;
}
-static void exponents_from_scale_factors(MPADecodeContext *s,
+static void exponents_from_scale_factors(MPADecodeContext *s,
GranuleDef *g,
- INT16 *exponents)
+ int16_t *exponents)
{
- const UINT8 *bstab, *pretab;
+ const uint8_t *bstab, *pretab;
int len, i, j, k, l, v0, shift, gain, gains[3];
- INT16 *exp_ptr;
+ int16_t *exp_ptr;
exp_ptr = exponents;
gain = g->global_gain - 210;
}
static int huffman_decode(MPADecodeContext *s, GranuleDef *g,
- INT16 *exponents, int end_pos)
+ int16_t *exponents, int end_pos)
{
int s_index;
int linbits, code, x, y, l, v, i, j, k, pos;
- UINT8 *last_buf_ptr;
- UINT32 last_bit_buf;
- int last_bit_cnt;
+ GetBitContext last_gb;
VLC *vlc;
- UINT8 *code_table;
+ uint8_t *code_table;
/* low frequencies (called big values) */
s_index = 0;
if (get_bits_count(&s->gb) >= end_pos)
break;
if (code_table) {
- code = get_vlc(&s->gb, vlc);
+ code = get_vlc2(&s->gb, vlc->table, 8, 2);
if (code < 0)
return -1;
y = code_table[code];
x = 0;
y = 0;
}
- dprintf("region=%d n=%d x=%d y=%d exp=%d\n",
+ dprintf("region=%d n=%d x=%d y=%d exp=%d\n",
i, g->region_size[i] - j, x, y, exponents[s_index]);
if (x) {
if (x == 15)
g->sb_hybrid[s_index++] = v;
}
}
-
+
/* high frequencies */
vlc = &huff_quad_vlc[g->count1table_select];
- last_buf_ptr = NULL;
- last_bit_buf = 0;
- last_bit_cnt = 0;
+ last_gb.buffer = NULL;
while (s_index <= 572) {
pos = get_bits_count(&s->gb);
if (pos >= end_pos) {
- if (pos > end_pos && last_buf_ptr != NULL) {
+ if (pos > end_pos && last_gb.buffer != NULL) {
/* some encoders generate an incorrect size for this
part. We must go back into the data */
s_index -= 4;
-#ifdef ALT_BITSTREAM_READER
- s->gb.buffer = last_buf_ptr;
- s->gb.index = last_bit_cnt;
-#else
- s->gb.buf_ptr = last_buf_ptr;
- s->gb.bit_buf = last_bit_buf;
- s->gb.bit_cnt = last_bit_cnt;
-#endif
+ s->gb = last_gb;
}
break;
}
-#ifdef ALT_BITSTREAM_READER
- last_buf_ptr = s->gb.buffer;
- last_bit_cnt = s->gb.index;
-#else
- last_buf_ptr = s->gb.buf_ptr;
- last_bit_buf = s->gb.bit_buf;
- last_bit_cnt = s->gb.bit_cnt;
-#endif
-
- code = get_vlc(&s->gb, vlc);
+ last_gb= s->gb;
+
+ code = get_vlc2(&s->gb, vlc->table, vlc->bits, 2);
dprintf("t=%d code=%d\n", g->count1table_select, code);
if (code < 0)
return -1;
static void reorder_block(MPADecodeContext *s, GranuleDef *g)
{
int i, j, k, len;
- INT32 *ptr, *dst, *ptr1;
- INT32 tmp[576];
+ int32_t *ptr, *dst, *ptr1;
+ int32_t tmp[576];
if (g->block_type != 2)
return;
} else {
ptr = g->sb_hybrid;
}
-
+
for(i=g->short_start;i<13;i++) {
len = band_size_short[s->sample_rate_index][i];
ptr1 = ptr;
dst += 3;
}
}
- memcpy(ptr1, tmp, len * 3 * sizeof(INT32));
+ memcpy(ptr1, tmp, len * 3 * sizeof(int32_t));
}
}
GranuleDef *g0, GranuleDef *g1)
{
int i, j, k, l;
- INT32 v1, v2;
+ int32_t v1, v2;
int sf_max, tmp0, tmp1, sf, len, non_zero_found;
- INT32 (*is_tab)[16];
- INT32 *tab0, *tab1;
+ int32_t (*is_tab)[16];
+ int32_t *tab0, *tab1;
int non_zero_found_short[3];
/* intensity stereo */
is_tab = is_table_lsf[g1->scalefac_compress & 1];
sf_max = 16;
}
-
+
tab0 = g0->sb_hybrid + 576;
tab1 = g1->sb_hybrid + 576;
}
}
- non_zero_found = non_zero_found_short[0] |
- non_zero_found_short[1] |
+ non_zero_found = non_zero_found_short[0] |
+ non_zero_found_short[1] |
non_zero_found_short[2];
for(i = g1->long_end - 1;i >= 0;i--) {
}
}
-static void compute_antialias(MPADecodeContext *s,
+static void compute_antialias_integer(MPADecodeContext *s,
GranuleDef *g)
{
- INT32 *ptr, *p0, *p1, *csa;
- int n, tmp0, tmp1, i, j;
+ int32_t *ptr, *csa;
+ int n, i;
/* we antialias only "long" bands */
if (g->block_type == 2) {
} else {
n = SBLIMIT - 1;
}
-
+
ptr = g->sb_hybrid + 18;
for(i = n;i > 0;i--) {
- p0 = ptr - 1;
- p1 = ptr;
+ int tmp0, tmp1, tmp2;
csa = &csa_table[0][0];
- for(j=0;j<8;j++) {
- tmp0 = *p0;
- tmp1 = *p1;
- *p0 = FRAC_RND(MUL64(tmp0, csa[0]) - MUL64(tmp1, csa[1]));
- *p1 = FRAC_RND(MUL64(tmp0, csa[1]) + MUL64(tmp1, csa[0]));
- p0--;
- p1++;
- csa += 2;
- }
+#define INT_AA(j) \
+ tmp0 = ptr[-1-j];\
+ tmp1 = ptr[ j];\
+ tmp2= MULH(tmp0 + tmp1, csa[0+4*j]);\
+ ptr[-1-j] = 4*(tmp2 - MULH(tmp1, csa[2+4*j]));\
+ ptr[ j] = 4*(tmp2 + MULH(tmp0, csa[3+4*j]));
+
+ INT_AA(0)
+ INT_AA(1)
+ INT_AA(2)
+ INT_AA(3)
+ INT_AA(4)
+ INT_AA(5)
+ INT_AA(6)
+ INT_AA(7)
+
+ ptr += 18;
+ }
+}
+
+static void compute_antialias_float(MPADecodeContext *s,
+ GranuleDef *g)
+{
+ int32_t *ptr;
+ int n, i;
+
+ /* we antialias only "long" bands */
+ if (g->block_type == 2) {
+ if (!g->switch_point)
+ return;
+ /* XXX: check this for 8000Hz case */
+ n = 1;
+ } else {
+ n = SBLIMIT - 1;
+ }
+
+ ptr = g->sb_hybrid + 18;
+ for(i = n;i > 0;i--) {
+ float tmp0, tmp1;
+ float *csa = &csa_table_float[0][0];
+#define FLOAT_AA(j)\
+ tmp0= ptr[-1-j];\
+ tmp1= ptr[ j];\
+ ptr[-1-j] = lrintf(tmp0 * csa[0+4*j] - tmp1 * csa[1+4*j]);\
+ ptr[ j] = lrintf(tmp0 * csa[1+4*j] + tmp1 * csa[0+4*j]);
+
+ FLOAT_AA(0)
+ FLOAT_AA(1)
+ FLOAT_AA(2)
+ FLOAT_AA(3)
+ FLOAT_AA(4)
+ FLOAT_AA(5)
+ FLOAT_AA(6)
+ FLOAT_AA(7)
+
ptr += 18;
}
}
static void compute_imdct(MPADecodeContext *s,
- GranuleDef *g,
- INT32 *sb_samples,
- INT32 *mdct_buf)
+ GranuleDef *g,
+ int32_t *sb_samples,
+ int32_t *mdct_buf)
{
- INT32 *ptr, *win, *win1, *buf, *buf2, *out_ptr, *ptr1;
- INT32 in[6];
- INT32 out[36];
- INT32 out2[12];
- int i, j, k, mdct_long_end, v, sblimit;
+ int32_t *ptr, *win, *win1, *buf, *out_ptr, *ptr1;
+ int32_t out2[12];
+ int i, j, mdct_long_end, v, sblimit;
/* find last non zero block */
ptr = g->sb_hybrid + 576;
buf = mdct_buf;
ptr = g->sb_hybrid;
for(j=0;j<mdct_long_end;j++) {
- imdct36(out, ptr);
/* apply window & overlap with previous buffer */
out_ptr = sb_samples + j;
/* select window */
win1 = mdct_win[g->block_type];
/* select frequency inversion */
win = win1 + ((4 * 36) & -(j & 1));
- for(i=0;i<18;i++) {
- *out_ptr = MULL(out[i], win[i]) + buf[i];
- buf[i] = MULL(out[i + 18], win[i + 18]);
- out_ptr += SBLIMIT;
- }
+ imdct36(out_ptr, buf, ptr, win);
+ out_ptr += 18*SBLIMIT;
ptr += 18;
buf += 18;
}
for(j=mdct_long_end;j<sblimit;j++) {
- for(i=0;i<6;i++) {
- out[i] = 0;
- out[6 + i] = 0;
- out[30+i] = 0;
- }
/* select frequency inversion */
win = mdct_win[2] + ((4 * 36) & -(j & 1));
- buf2 = out + 6;
- for(k=0;k<3;k++) {
- /* reorder input for short mdct */
- ptr1 = ptr + k;
- for(i=0;i<6;i++) {
- in[i] = *ptr1;
- ptr1 += 3;
- }
- imdct12(out2, in);
- /* apply 12 point window and do small overlap */
- for(i=0;i<6;i++) {
- buf2[i] = MULL(out2[i], win[i]) + buf2[i];
- buf2[i + 6] = MULL(out2[i + 6], win[i + 6]);
- }
- buf2 += 6;
- }
- /* overlap */
out_ptr = sb_samples + j;
- for(i=0;i<18;i++) {
- *out_ptr = out[i] + buf[i];
- buf[i] = out[i + 18];
+
+ for(i=0; i<6; i++){
+ *out_ptr = buf[i];
out_ptr += SBLIMIT;
}
+ imdct12(out2, ptr + 0);
+ for(i=0;i<6;i++) {
+ *out_ptr = MULH(out2[i], win[i]) + buf[i + 6*1];
+ buf[i + 6*2] = MULH(out2[i + 6], win[i + 6]);
+ out_ptr += SBLIMIT;
+ }
+ imdct12(out2, ptr + 1);
+ for(i=0;i<6;i++) {
+ *out_ptr = MULH(out2[i], win[i]) + buf[i + 6*2];
+ buf[i + 6*0] = MULH(out2[i + 6], win[i + 6]);
+ out_ptr += SBLIMIT;
+ }
+ imdct12(out2, ptr + 2);
+ for(i=0;i<6;i++) {
+ buf[i + 6*0] = MULH(out2[i], win[i]) + buf[i + 6*0];
+ buf[i + 6*1] = MULH(out2[i + 6], win[i + 6]);
+ buf[i + 6*2] = 0;
+ }
ptr += 18;
buf += 18;
}
}
#if defined(DEBUG)
-void sample_dump(int fnum, INT32 *tab, int n)
+void sample_dump(int fnum, int32_t *tab, int n)
{
static FILE *files[16], *f;
char buf[512];
+ int i;
+ int32_t v;
f = files[fnum];
if (!f) {
- sprintf(buf, "/tmp/out%d.pcm", fnum);
+ snprintf(buf, sizeof(buf), "/tmp/out%d.%s.pcm",
+ fnum,
+#ifdef USE_HIGHPRECISION
+ "hp"
+#else
+ "lp"
+#endif
+ );
f = fopen(buf, "w");
if (!f)
return;
files[fnum] = f;
}
-
+
if (fnum == 0) {
- int i;
static int pos = 0;
- printf("pos=%d\n", pos);
+ av_log(NULL, AV_LOG_DEBUG, "pos=%d\n", pos);
for(i=0;i<n;i++) {
- printf(" %f", (double)tab[i] / 32768.0);
+ av_log(NULL, AV_LOG_DEBUG, " %0.4f", (double)tab[i] / FRAC_ONE);
if ((i % 18) == 17)
- printf("\n");
+ av_log(NULL, AV_LOG_DEBUG, "\n");
}
pos += n;
}
-
- fwrite(tab, 1, n * sizeof(INT32), f);
+ for(i=0;i<n;i++) {
+ /* normalize to 23 frac bits */
+ v = tab[i] << (23 - FRAC_BITS);
+ fwrite(&v, 1, sizeof(int32_t), f);
+ }
}
#endif
int nb_granules, main_data_begin, private_bits;
int gr, ch, blocksplit_flag, i, j, k, n, bits_pos, bits_left;
GranuleDef granules[2][2], *g;
- INT16 exponents[576];
+ int16_t exponents[576];
/* read side info */
if (s->lsf) {
granules[ch][1].scfsi = get_bits(&s->gb, 4);
}
}
-
+
for(gr=0;gr<nb_granules;gr++) {
for(ch=0;ch<s->nb_channels;ch++) {
dprintf("gr=%d ch=%d: side_info\n", gr, ch);
g->global_gain = get_bits(&s->gb, 8);
/* if MS stereo only is selected, we precompute the
1/sqrt(2) renormalization factor */
- if ((s->mode_ext & (MODE_EXT_MS_STEREO | MODE_EXT_I_STEREO)) ==
+ if ((s->mode_ext & (MODE_EXT_MS_STEREO | MODE_EXT_I_STEREO)) ==
MODE_EXT_MS_STEREO)
g->global_gain -= 2;
if (s->lsf)
g->switch_point = get_bits(&s->gb, 1);
for(i=0;i<2;i++)
g->table_select[i] = get_bits(&s->gb, 5);
- for(i=0;i<3;i++)
+ for(i=0;i<3;i++)
g->subblock_gain[i] = get_bits(&s->gb, 3);
/* compute huffman coded region sizes */
if (g->block_type == 2)
g->region_size[0] = (36 / 2);
else {
- if (s->sample_rate_index <= 2)
+ if (s->sample_rate_index <= 2)
g->region_size[0] = (36 / 2);
- else if (s->sample_rate_index != 8)
+ else if (s->sample_rate_index != 8)
g->region_size[0] = (54 / 2);
else
g->region_size[0] = (108 / 2);
/* compute huffman coded region sizes */
region_address1 = get_bits(&s->gb, 4);
region_address2 = get_bits(&s->gb, 3);
- dprintf("region1=%d region2=%d\n",
+ dprintf("region1=%d region2=%d\n",
region_address1, region_address2);
- g->region_size[0] =
+ g->region_size[0] =
band_index_long[s->sample_rate_index][region_address1 + 1] >> 1;
l = region_address1 + region_address2 + 2;
/* should not overflow */
if (l > 22)
l = 22;
- g->region_size[1] =
+ g->region_size[1] =
band_index_long[s->sample_rate_index][l] >> 1;
}
/* convert region offsets to region sizes and truncate
g->long_end = 6;
else
g->long_end = 4; /* 8000 Hz */
-
+
if (s->sample_rate_index != 8)
g->short_start = 3;
else
- g->short_start = 2;
+ g->short_start = 2;
} else {
g->long_end = 0;
g->short_start = 0;
g->short_start = 13;
g->long_end = 22;
}
-
+
g->preflag = 0;
if (!s->lsf)
g->preflag = get_bits(&s->gb, 1);
}
}
+ if (!s->adu_mode) {
/* now we get bits from the main_data_begin offset */
dprintf("seekback: %d\n", main_data_begin);
seek_to_maindata(s, main_data_begin);
+ }
for(gr=0;gr<nb_granules;gr++) {
for(ch=0;ch<s->nb_channels;ch++) {
g = &granules[ch][gr];
-
+
bits_pos = get_bits_count(&s->gb);
-
+
if (!s->lsf) {
- UINT8 *sc;
+ uint8_t *sc;
int slen, slen1, slen2;
/* MPEG1 scale factors */
}
#if defined(DEBUG)
{
- printf("scfsi=%x gr=%d ch=%d scale_factors:\n",
+ dprintf("scfsi=%x gr=%d ch=%d scale_factors:\n",
g->scfsi, gr, ch);
for(i=0;i<j;i++)
- printf(" %d", g->scale_factors[i]);
- printf("\n");
+ dprintf(" %d", g->scale_factors[i]);
+ dprintf("\n");
}
#endif
} else {
g->scale_factors[j] = 0;
#if defined(DEBUG)
{
- printf("gr=%d ch=%d scale_factors:\n",
+ dprintf("gr=%d ch=%d scale_factors:\n",
gr, ch);
for(i=0;i<40;i++)
- printf(" %d", g->scale_factors[i]);
- printf("\n");
+ dprintf(" %d", g->scale_factors[i]);
+ dprintf("\n");
}
#endif
}
#if defined(DEBUG)
sample_dump(0, g->sb_hybrid, 576);
#endif
- compute_antialias(s, g);
-#ifdef DEBUG
+ s->compute_antialias(s, g);
+#if defined(DEBUG)
sample_dump(1, g->sb_hybrid, 576);
#endif
- compute_imdct(s, g, &s->sb_samples[ch][18 * gr][0], s->mdct_buf[ch]);
-#ifdef DEBUG
+ compute_imdct(s, g, &s->sb_samples[ch][18 * gr][0], s->mdct_buf[ch]);
+#if defined(DEBUG)
sample_dump(2, &s->sb_samples[ch][18 * gr][0], 576);
#endif
}
return nb_granules * 18;
}
-static int mp_decode_frame(MPADecodeContext *s,
- short *samples)
+static int mp_decode_frame(MPADecodeContext *s,
+ OUT_INT *samples)
{
int i, nb_frames, ch;
- short *samples_ptr;
+ OUT_INT *samples_ptr;
+
+ init_get_bits(&s->gb, s->inbuf + HEADER_SIZE,
+ (s->inbuf_ptr - s->inbuf - HEADER_SIZE)*8);
- init_get_bits(&s->gb, s->inbuf + HEADER_SIZE,
- s->inbuf_ptr - s->inbuf - HEADER_SIZE);
-
/* skip error protection field */
if (s->error_protection)
get_bits(&s->gb, 16);
for(i=0;i<nb_frames;i++) {
for(ch=0;ch<s->nb_channels;ch++) {
int j;
- printf("%d-%d:", i, ch);
+ dprintf("%d-%d:", i, ch);
for(j=0;j<SBLIMIT;j++)
- printf(" %0.6f", (double)s->sb_samples[ch][i][j] / FRAC_ONE);
- printf("\n");
+ dprintf(" %0.6f", (double)s->sb_samples[ch][i][j] / FRAC_ONE);
+ dprintf("\n");
}
}
#endif
for(ch=0;ch<s->nb_channels;ch++) {
samples_ptr = samples + ch;
for(i=0;i<nb_frames;i++) {
- synth_filter(s, ch, samples_ptr, s->nb_channels,
+ ff_mpa_synth_filter(s->synth_buf[ch], &(s->synth_buf_offset[ch]),
+ window, &s->dither_state,
+ samples_ptr, s->nb_channels,
s->sb_samples[ch][i]);
samples_ptr += 32 * s->nb_channels;
}
}
#ifdef DEBUG
- s->frame_count++;
+ s->frame_count++;
#endif
- return nb_frames * 32 * sizeof(short) * s->nb_channels;
+ return nb_frames * 32 * sizeof(OUT_INT) * s->nb_channels;
}
static int decode_frame(AVCodecContext * avctx,
- void *data, int *data_size,
- UINT8 * buf, int buf_size)
+ void *data, int *data_size,
+ uint8_t * buf, int buf_size)
{
MPADecodeContext *s = avctx->priv_data;
- UINT32 header;
- UINT8 *buf_ptr;
+ uint32_t header;
+ uint8_t *buf_ptr;
int len, out_size;
- short *out_samples = data;
+ OUT_INT *out_samples = data;
- *data_size = 0;
buf_ptr = buf;
while (buf_size > 0) {
- len = s->inbuf_ptr - s->inbuf;
- if (s->frame_size == 0) {
+ len = s->inbuf_ptr - s->inbuf;
+ if (s->frame_size == 0) {
/* special case for next header for first frame in free
format case (XXX: find a simpler method) */
if (s->free_format_next_header != 0) {
s->free_format_next_header = 0;
goto got_header;
}
- /* no header seen : find one. We need at least HEADER_SIZE
+ /* no header seen : find one. We need at least HEADER_SIZE
bytes to parse it */
- len = HEADER_SIZE - len;
- if (len > buf_size)
- len = buf_size;
- if (len > 0) {
- memcpy(s->inbuf_ptr, buf_ptr, len);
- buf_ptr += len;
- buf_size -= len;
- s->inbuf_ptr += len;
- }
- if ((s->inbuf_ptr - s->inbuf) >= HEADER_SIZE) {
+ len = HEADER_SIZE - len;
+ if (len > buf_size)
+ len = buf_size;
+ if (len > 0) {
+ memcpy(s->inbuf_ptr, buf_ptr, len);
+ buf_ptr += len;
+ buf_size -= len;
+ s->inbuf_ptr += len;
+ }
+ if ((s->inbuf_ptr - s->inbuf) >= HEADER_SIZE) {
got_header:
- header = (s->inbuf[0] << 24) | (s->inbuf[1] << 16) |
- (s->inbuf[2] << 8) | s->inbuf[3];
+ header = (s->inbuf[0] << 24) | (s->inbuf[1] << 16) |
+ (s->inbuf[2] << 8) | s->inbuf[3];
- if (check_header(header) < 0) {
- /* no sync found : move by one byte (inefficient, but simple!) */
- memcpy(s->inbuf, s->inbuf + 1, s->inbuf_ptr - s->inbuf - 1);
- s->inbuf_ptr--;
+ if (ff_mpa_check_header(header) < 0) {
+ /* no sync found : move by one byte (inefficient, but simple!) */
+ memmove(s->inbuf, s->inbuf + 1, s->inbuf_ptr - s->inbuf - 1);
+ s->inbuf_ptr--;
dprintf("skip %x\n", header);
/* reset free format frame size to give a chance
to get a new bitrate */
s->free_format_frame_size = 0;
- } else {
- if (decode_header(s, header) == 1) {
- /* free format: compute frame size */
- s->frame_size = -1;
- memcpy(s->inbuf, s->inbuf + 1, s->inbuf_ptr - s->inbuf - 1);
- s->inbuf_ptr--;
- } else {
- /* update codec info */
- avctx->sample_rate = s->sample_rate;
- avctx->channels = s->nb_channels;
- avctx->bit_rate = s->bit_rate;
- avctx->frame_size = s->frame_size;
+ } else {
+ if (decode_header(s, header) == 1) {
+ /* free format: prepare to compute frame size */
+ s->frame_size = -1;
+ }
+ /* update codec info */
+ avctx->sample_rate = s->sample_rate;
+ avctx->channels = s->nb_channels;
+ avctx->bit_rate = s->bit_rate;
+ avctx->sub_id = s->layer;
+ switch(s->layer) {
+ case 1:
+ avctx->frame_size = 384;
+ break;
+ case 2:
+ avctx->frame_size = 1152;
+ break;
+ case 3:
+ if (s->lsf)
+ avctx->frame_size = 576;
+ else
+ avctx->frame_size = 1152;
+ break;
}
- }
- }
+ }
+ }
} else if (s->frame_size == -1) {
/* free format : find next sync to compute frame size */
- len = MPA_MAX_CODED_FRAME_SIZE - len;
- if (len > buf_size)
- len = buf_size;
+ len = MPA_MAX_CODED_FRAME_SIZE - len;
+ if (len > buf_size)
+ len = buf_size;
if (len == 0) {
/* frame too long: resync */
s->frame_size = 0;
+ memmove(s->inbuf, s->inbuf + 1, s->inbuf_ptr - s->inbuf - 1);
+ s->inbuf_ptr--;
} else {
- UINT8 *p, *pend;
- UINT32 header1;
+ uint8_t *p, *pend;
+ uint32_t header1;
int padding;
memcpy(s->inbuf_ptr, buf_ptr, len);
s->free_format_frame_size -= padding * 4;
else
s->free_format_frame_size -= padding;
- dprintf("free frame size=%d padding=%d\n",
+ dprintf("free frame size=%d padding=%d\n",
s->free_format_frame_size, padding);
decode_header(s, header1);
goto next_data;
s->inbuf_ptr += len;
buf_size -= len;
}
- } else if (len < s->frame_size) {
+ } else if (len < s->frame_size) {
if (s->frame_size > MPA_MAX_CODED_FRAME_SIZE)
s->frame_size = MPA_MAX_CODED_FRAME_SIZE;
- len = s->frame_size - len;
- if (len > buf_size)
- len = buf_size;
- memcpy(s->inbuf_ptr, buf_ptr, len);
- buf_ptr += len;
- s->inbuf_ptr += len;
- buf_size -= len;
- } else {
- out_size = mp_decode_frame(s, out_samples);
- s->inbuf_ptr = s->inbuf;
- s->frame_size = 0;
- *data_size = out_size;
- break;
- }
+ len = s->frame_size - len;
+ if (len > buf_size)
+ len = buf_size;
+ memcpy(s->inbuf_ptr, buf_ptr, len);
+ buf_ptr += len;
+ s->inbuf_ptr += len;
+ buf_size -= len;
+ }
next_data:
+ if (s->frame_size > 0 &&
+ (s->inbuf_ptr - s->inbuf) >= s->frame_size) {
+ if (avctx->parse_only) {
+ /* simply return the frame data */
+ *(uint8_t **)data = s->inbuf;
+ out_size = s->inbuf_ptr - s->inbuf;
+ } else {
+ out_size = mp_decode_frame(s, out_samples);
+ }
+ s->inbuf_ptr = s->inbuf;
+ s->frame_size = 0;
+ if(out_size>=0)
+ *data_size = out_size;
+ else
+ av_log(avctx, AV_LOG_DEBUG, "Error while decoding mpeg audio frame\n"); //FIXME return -1 / but also return the number of bytes consumed
+ break;
+ }
}
return buf_ptr - buf;
}
+
+static int decode_frame_adu(AVCodecContext * avctx,
+ void *data, int *data_size,
+ uint8_t * buf, int buf_size)
+{
+ MPADecodeContext *s = avctx->priv_data;
+ uint32_t header;
+ int len, out_size;
+ OUT_INT *out_samples = data;
+
+ len = buf_size;
+
+ // Discard too short frames
+ if (buf_size < HEADER_SIZE) {
+ *data_size = 0;
+ return buf_size;
+ }
+
+
+ if (len > MPA_MAX_CODED_FRAME_SIZE)
+ len = MPA_MAX_CODED_FRAME_SIZE;
+
+ memcpy(s->inbuf, buf, len);
+ s->inbuf_ptr = s->inbuf + len;
+
+ // Get header and restore sync word
+ header = (s->inbuf[0] << 24) | (s->inbuf[1] << 16) |
+ (s->inbuf[2] << 8) | s->inbuf[3] | 0xffe00000;
+
+ if (ff_mpa_check_header(header) < 0) { // Bad header, discard frame
+ *data_size = 0;
+ return buf_size;
+ }
+
+ decode_header(s, header);
+ /* update codec info */
+ avctx->sample_rate = s->sample_rate;
+ avctx->channels = s->nb_channels;
+ avctx->bit_rate = s->bit_rate;
+ avctx->sub_id = s->layer;
+
+ avctx->frame_size=s->frame_size = len;
+
+ if (avctx->parse_only) {
+ /* simply return the frame data */
+ *(uint8_t **)data = s->inbuf;
+ out_size = s->inbuf_ptr - s->inbuf;
+ } else {
+ out_size = mp_decode_frame(s, out_samples);
+ }
+
+ *data_size = out_size;
+ return buf_size;
+}
+
+
+/* Next 3 arrays are indexed by channel config number (passed via codecdata) */
+static int mp3Frames[16] = {0,1,1,2,3,3,4,5,2}; /* number of mp3 decoder instances */
+static int mp3Channels[16] = {0,1,2,3,4,5,6,8,4}; /* total output channels */
+/* offsets into output buffer, assume output order is FL FR BL BR C LFE */
+static int chan_offset[9][5] = {
+ {0},
+ {0}, // C
+ {0}, // FLR
+ {2,0}, // C FLR
+ {2,0,3}, // C FLR BS
+ {4,0,2}, // C FLR BLRS
+ {4,0,2,5}, // C FLR BLRS LFE
+ {4,0,2,6,5}, // C FLR BLRS BLR LFE
+ {0,2} // FLR BLRS
+};
+
+
+static int decode_init_mp3on4(AVCodecContext * avctx)
+{
+ MP3On4DecodeContext *s = avctx->priv_data;
+ int i;
+
+ if ((avctx->extradata_size < 2) || (avctx->extradata == NULL)) {
+ av_log(avctx, AV_LOG_ERROR, "Codec extradata missing or too short.\n");
+ return -1;
+ }
+
+ s->chan_cfg = (((unsigned char *)avctx->extradata)[1] >> 3) & 0x0f;
+ s->frames = mp3Frames[s->chan_cfg];
+ if(!s->frames) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid channel config number.\n");
+ return -1;
+ }
+ avctx->channels = mp3Channels[s->chan_cfg];
+
+ /* Init the first mp3 decoder in standard way, so that all tables get builded
+ * We replace avctx->priv_data with the context of the first decoder so that
+ * decode_init() does not have to be changed.
+ * Other decoders will be inited here copying data from the first context
+ */
+ // Allocate zeroed memory for the first decoder context
+ s->mp3decctx[0] = av_mallocz(sizeof(MPADecodeContext));
+ // Put decoder context in place to make init_decode() happy
+ avctx->priv_data = s->mp3decctx[0];
+ decode_init(avctx);
+ // Restore mp3on4 context pointer
+ avctx->priv_data = s;
+ s->mp3decctx[0]->adu_mode = 1; // Set adu mode
+
+ /* Create a separate codec/context for each frame (first is already ok).
+ * Each frame is 1 or 2 channels - up to 5 frames allowed
+ */
+ for (i = 1; i < s->frames; i++) {
+ s->mp3decctx[i] = av_mallocz(sizeof(MPADecodeContext));
+ s->mp3decctx[i]->compute_antialias = s->mp3decctx[0]->compute_antialias;
+ s->mp3decctx[i]->inbuf = &s->mp3decctx[i]->inbuf1[0][BACKSTEP_SIZE];
+ s->mp3decctx[i]->inbuf_ptr = s->mp3decctx[i]->inbuf;
+ s->mp3decctx[i]->adu_mode = 1;
+ }
+
+ return 0;
+}
+
+
+static int decode_close_mp3on4(AVCodecContext * avctx)
+{
+ MP3On4DecodeContext *s = avctx->priv_data;
+ int i;
+
+ for (i = 0; i < s->frames; i++)
+ if (s->mp3decctx[i])
+ av_free(s->mp3decctx[i]);
+
+ return 0;
+}
+
+
+static int decode_frame_mp3on4(AVCodecContext * avctx,
+ void *data, int *data_size,
+ uint8_t * buf, int buf_size)
+{
+ MP3On4DecodeContext *s = avctx->priv_data;
+ MPADecodeContext *m;
+ int len, out_size = 0;
+ uint32_t header;
+ OUT_INT *out_samples = data;
+ OUT_INT decoded_buf[MPA_FRAME_SIZE * MPA_MAX_CHANNELS];
+ OUT_INT *outptr, *bp;
+ int fsize;
+ unsigned char *start2 = buf, *start;
+ int fr, i, j, n;
+ int off = avctx->channels;
+ int *coff = chan_offset[s->chan_cfg];
+
+ len = buf_size;
+
+ // Discard too short frames
+ if (buf_size < HEADER_SIZE) {
+ *data_size = 0;
+ return buf_size;
+ }
+
+ // If only one decoder interleave is not needed
+ outptr = s->frames == 1 ? out_samples : decoded_buf;
+
+ for (fr = 0; fr < s->frames; fr++) {
+ start = start2;
+ fsize = (start[0] << 4) | (start[1] >> 4);
+ start2 += fsize;
+ if (fsize > len)
+ fsize = len;
+ len -= fsize;
+ if (fsize > MPA_MAX_CODED_FRAME_SIZE)
+ fsize = MPA_MAX_CODED_FRAME_SIZE;
+ m = s->mp3decctx[fr];
+ assert (m != NULL);
+ /* copy original to new */
+ m->inbuf_ptr = m->inbuf + fsize;
+ memcpy(m->inbuf, start, fsize);
+
+ // Get header
+ header = (m->inbuf[0] << 24) | (m->inbuf[1] << 16) |
+ (m->inbuf[2] << 8) | m->inbuf[3] | 0xfff00000;
+
+ if (ff_mpa_check_header(header) < 0) { // Bad header, discard block
+ *data_size = 0;
+ return buf_size;
+ }
+
+ decode_header(m, header);
+ mp_decode_frame(m, decoded_buf);
+
+ n = MPA_FRAME_SIZE * m->nb_channels;
+ out_size += n * sizeof(OUT_INT);
+ if(s->frames > 1) {
+ /* interleave output data */
+ bp = out_samples + coff[fr];
+ if(m->nb_channels == 1) {
+ for(j = 0; j < n; j++) {
+ *bp = decoded_buf[j];
+ bp += off;
+ }
+ } else {
+ for(j = 0; j < n; j++) {
+ bp[0] = decoded_buf[j++];
+ bp[1] = decoded_buf[j];
+ bp += off;
+ }
+ }
+ }
+ }
+
+ /* update codec info */
+ avctx->sample_rate = s->mp3decctx[0]->sample_rate;
+ avctx->frame_size= buf_size;
+ avctx->bit_rate = 0;
+ for (i = 0; i < s->frames; i++)
+ avctx->bit_rate += s->mp3decctx[i]->bit_rate;
+
+ *data_size = out_size;
+ return buf_size;
+}
+
+
AVCodec mp2_decoder =
{
"mp2",
NULL,
NULL,
decode_frame,
+ CODEC_CAP_PARSE_ONLY,
};
AVCodec mp3_decoder =
{
"mp3",
CODEC_TYPE_AUDIO,
- CODEC_ID_MP3LAME,
+ CODEC_ID_MP3,
sizeof(MPADecodeContext),
decode_init,
NULL,
NULL,
decode_frame,
+ CODEC_CAP_PARSE_ONLY,
+};
+
+AVCodec mp3adu_decoder =
+{
+ "mp3adu",
+ CODEC_TYPE_AUDIO,
+ CODEC_ID_MP3ADU,
+ sizeof(MPADecodeContext),
+ decode_init,
+ NULL,
+ NULL,
+ decode_frame_adu,
+ CODEC_CAP_PARSE_ONLY,
+};
+
+AVCodec mp3on4_decoder =
+{
+ "mp3on4",
+ CODEC_TYPE_AUDIO,
+ CODEC_ID_MP3ON4,
+ sizeof(MP3On4DecodeContext),
+ decode_init_mp3on4,
+ NULL,
+ decode_close_mp3on4,
+ decode_frame_mp3on4,
+ 0
};
projects / ffmpeg / blobdiff