diff options
Diffstat (limited to 'libavcodec')
-rw-r--r-- | libavcodec/ac3.c | 46 | ||||
-rw-r--r-- | libavcodec/ac3.h | 19 | ||||
-rw-r--r-- | libavcodec/ac3dec.c | 3 | ||||
-rw-r--r-- | libavcodec/ac3dec.h | 2 | ||||
-rw-r--r-- | libavcodec/ac3dsp.c | 27 | ||||
-rw-r--r-- | libavcodec/ac3dsp.h | 19 | ||||
-rw-r--r-- | libavcodec/ac3enc.c | 2 | ||||
-rw-r--r-- | libavcodec/ac3tab.h | 8 |
8 files changed, 70 insertions, 56 deletions
diff --git a/libavcodec/ac3.c b/libavcodec/ac3.c index c8659fe..704c6e0 100644 --- a/libavcodec/ac3.c +++ b/libavcodec/ac3.c @@ -31,7 +31,7 @@ /** * Starting frequency coefficient bin for each critical band. */ -static const uint8_t band_start_tab[AC3_CRITICAL_BANDS+1] = { +const uint8_t ff_ac3_band_start_tab[AC3_CRITICAL_BANDS+1] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 31, @@ -44,7 +44,7 @@ static const uint8_t band_start_tab[AC3_CRITICAL_BANDS+1] = { /** * Map each frequency coefficient bin to the critical band that contains it. */ -static const uint8_t bin_to_band_tab[253] = { +const uint8_t ff_ac3_bin_to_band_tab[253] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, @@ -70,7 +70,7 @@ static const uint8_t bin_to_band_tab[253] = { }; #else /* CONFIG_HARDCODED_TABLES */ -static uint8_t bin_to_band_tab[253]; +uint8_t ff_ac3_bin_to_band_tab[253]; #endif static inline int calc_lowcomp1(int a, int b0, int b1, int c) @@ -106,10 +106,10 @@ void ff_ac3_bit_alloc_calc_psd(int8_t *exp, int start, int end, int16_t *psd, /* PSD integration */ bin = start; - band = bin_to_band_tab[start]; + band = ff_ac3_bin_to_band_tab[start]; do { int v = psd[bin++]; - int band_end = FFMIN(band_start_tab[band+1], end); + int band_end = FFMIN(ff_ac3_band_start_tab[band+1], end); for (; bin < band_end; bin++) { int max = FFMAX(v, psd[bin]); /* logadd */ @@ -117,7 +117,7 @@ void ff_ac3_bit_alloc_calc_psd(int8_t *exp, int start, int end, int16_t *psd, v = max + ff_ac3_log_add_tab[adr]; } band_psd[band++] = v; - } while (end > band_start_tab[band]); + } while (end > ff_ac3_band_start_tab[band]); } int ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *band_psd, @@ -132,8 +132,8 @@ int ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *band_psd, int lowcomp, fastleak, slowleak; /* excitation function */ - band_start = bin_to_band_tab[start]; - band_end = bin_to_band_tab[end-1] + 1; + band_start = ff_ac3_bin_to_band_tab[start]; + band_end = ff_ac3_bin_to_band_tab[end-1] + 1; if (band_start == 0) { lowcomp = 0; @@ -212,30 +212,6 @@ int ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *band_psd, return 0; } -void ff_ac3_bit_alloc_calc_bap(int16_t *mask, int16_t *psd, int start, int end, - int snr_offset, int floor, - const uint8_t *bap_tab, uint8_t *bap) -{ - int bin, band; - - /* special case, if snr offset is -960, set all bap's to zero */ - if (snr_offset == -960) { - memset(bap, 0, AC3_MAX_COEFS); - return; - } - - bin = start; - band = bin_to_band_tab[start]; - do { - int m = (FFMAX(mask[band] - snr_offset - floor, 0) & 0x1FE0) + floor; - int band_end = FFMIN(band_start_tab[band+1], end); - for (; bin < band_end; bin++) { - int address = av_clip((psd[bin] - m) >> 5, 0, 63); - bap[bin] = bap_tab[address]; - } - } while (end > band_start_tab[band++]); -} - /** * Initialize some tables. * note: This function must remain thread safe because it is called by the @@ -244,12 +220,12 @@ void ff_ac3_bit_alloc_calc_bap(int16_t *mask, int16_t *psd, int start, int end, av_cold void ff_ac3_common_init(void) { #if !CONFIG_HARDCODED_TABLES - /* compute bin_to_band_tab from band_start_tab */ + /* compute ff_ac3_bin_to_band_tab from ff_ac3_band_start_tab */ int bin = 0, band; for (band = 0; band < AC3_CRITICAL_BANDS; band++) { - int band_end = band_start_tab[band+1]; + int band_end = ff_ac3_band_start_tab[band+1]; while (bin < band_end) - bin_to_band_tab[bin++] = band; + ff_ac3_bin_to_band_tab[bin++] = band; } #endif /* !CONFIG_HARDCODED_TABLES */ } diff --git a/libavcodec/ac3.h b/libavcodec/ac3.h index 133c5b9..4ed8c25 100644 --- a/libavcodec/ac3.h +++ b/libavcodec/ac3.h @@ -175,23 +175,4 @@ int ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *band_psd, uint8_t *dba_lengths, uint8_t *dba_values, int16_t *mask); -/** - * Calculate bit allocation pointers. - * The SNR is the difference between the masking curve and the signal. AC-3 - * uses this value for each frequency bin to allocate bits. The snroffset - * parameter is a global adjustment to the SNR for all bins. - * - * @param[in] mask masking curve - * @param[in] psd signal power for each frequency bin - * @param[in] start starting bin location - * @param[in] end ending bin location - * @param[in] snr_offset SNR adjustment - * @param[in] floor noise floor - * @param[in] bap_tab look-up table for bit allocation pointers - * @param[out] bap bit allocation pointers - */ -void ff_ac3_bit_alloc_calc_bap(int16_t *mask, int16_t *psd, int start, int end, - int snr_offset, int floor, - const uint8_t *bap_tab, uint8_t *bap); - #endif /* AVCODEC_AC3_H */ diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c index e08efa1..396df87 100644 --- a/libavcodec/ac3dec.c +++ b/libavcodec/ac3dec.c @@ -184,6 +184,7 @@ static av_cold int ac3_decode_init(AVCodecContext *avctx) ff_mdct_init(&s->imdct_512, 9, 1, 1.0); ff_kbd_window_init(s->window, 5.0, 256); dsputil_init(&s->dsp, avctx); + ff_ac3dsp_init(&s->ac3dsp, avctx->flags & CODEC_FLAG_BITEXACT); ff_fmt_convert_init(&s->fmt_conv, avctx); av_lfg_init(&s->dith_state, 0); @@ -1213,7 +1214,7 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) /* Compute bit allocation */ const uint8_t *bap_tab = s->channel_uses_aht[ch] ? ff_eac3_hebap_tab : ff_ac3_bap_tab; - ff_ac3_bit_alloc_calc_bap(s->mask[ch], s->psd[ch], + s->ac3dsp.bit_alloc_calc_bap(s->mask[ch], s->psd[ch], s->start_freq[ch], s->end_freq[ch], s->snr_offset[ch], s->bit_alloc_params.floor, diff --git a/libavcodec/ac3dec.h b/libavcodec/ac3dec.h index 9d0ffc3..3459441 100644 --- a/libavcodec/ac3dec.h +++ b/libavcodec/ac3dec.h @@ -52,6 +52,7 @@ #include "libavutil/lfg.h" #include "ac3.h" +#include "ac3dsp.h" #include "get_bits.h" #include "dsputil.h" #include "fft.h" @@ -192,6 +193,7 @@ typedef struct { ///@defgroup opt optimization DSPContext dsp; ///< for optimization + AC3DSPContext ac3dsp; FmtConvertContext fmt_conv; ///< optimized conversion functions float mul_bias; ///< scaling for float_to_int16 conversion ///@} diff --git a/libavcodec/ac3dsp.c b/libavcodec/ac3dsp.c index 42b44f7..77250a3 100644 --- a/libavcodec/ac3dsp.c +++ b/libavcodec/ac3dsp.c @@ -20,6 +20,7 @@ */ #include "avcodec.h" +#include "ac3.h" #include "ac3dsp.h" static void ac3_exponent_min_c(uint8_t *exp, int num_reuse_blocks, int nb_coefs) @@ -101,6 +102,31 @@ static void float_to_fixed24_c(int32_t *dst, const float *src, unsigned int len) } while (len > 0); } +static void ac3_bit_alloc_calc_bap_c(int16_t *mask, int16_t *psd, + int start, int end, + int snr_offset, int floor, + const uint8_t *bap_tab, uint8_t *bap) +{ + int bin, band; + + /* special case, if snr offset is -960, set all bap's to zero */ + if (snr_offset == -960) { + memset(bap, 0, AC3_MAX_COEFS); + return; + } + + bin = start; + band = ff_ac3_bin_to_band_tab[start]; + do { + int m = (FFMAX(mask[band] - snr_offset - floor, 0) & 0x1FE0) + floor; + int band_end = FFMIN(ff_ac3_band_start_tab[band+1], end); + for (; bin < band_end; bin++) { + int address = av_clip((psd[bin] - m) >> 5, 0, 63); + bap[bin] = bap_tab[address]; + } + } while (end > ff_ac3_band_start_tab[band++]); +} + av_cold void ff_ac3dsp_init(AC3DSPContext *c, int bit_exact) { c->ac3_exponent_min = ac3_exponent_min_c; @@ -108,6 +134,7 @@ av_cold void ff_ac3dsp_init(AC3DSPContext *c, int bit_exact) c->ac3_lshift_int16 = ac3_lshift_int16_c; c->ac3_rshift_int32 = ac3_rshift_int32_c; c->float_to_fixed24 = float_to_fixed24_c; + c->bit_alloc_calc_bap = ac3_bit_alloc_calc_bap_c; if (ARCH_ARM) ff_ac3dsp_init_arm(c, bit_exact); diff --git a/libavcodec/ac3dsp.h b/libavcodec/ac3dsp.h index eeaa56c..bf4fc14 100644 --- a/libavcodec/ac3dsp.h +++ b/libavcodec/ac3dsp.h @@ -81,6 +81,25 @@ typedef struct AC3DSPContext { * constraints: multiple of 32 greater than zero */ void (*float_to_fixed24)(int32_t *dst, const float *src, unsigned int len); + + /** + * Calculate bit allocation pointers. + * The SNR is the difference between the masking curve and the signal. AC-3 + * uses this value for each frequency bin to allocate bits. The snroffset + * parameter is a global adjustment to the SNR for all bins. + * + * @param[in] mask masking curve + * @param[in] psd signal power for each frequency bin + * @param[in] start starting bin location + * @param[in] end ending bin location + * @param[in] snr_offset SNR adjustment + * @param[in] floor noise floor + * @param[in] bap_tab look-up table for bit allocation pointers + * @param[out] bap bit allocation pointers + */ + void (*bit_alloc_calc_bap)(int16_t *mask, int16_t *psd, int start, int end, + int snr_offset, int floor, + const uint8_t *bap_tab, uint8_t *bap); } AC3DSPContext; void ff_ac3dsp_init (AC3DSPContext *c, int bit_exact); diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c index c641400..e62ded6 100644 --- a/libavcodec/ac3enc.c +++ b/libavcodec/ac3enc.c @@ -1047,7 +1047,7 @@ static int bit_alloc(AC3EncodeContext *s, int snr_offset) whenever we reuse exponents. */ block = s->blocks[blk].exp_ref_block[ch]; if (s->exp_strategy[ch][blk] != EXP_REUSE) { - ff_ac3_bit_alloc_calc_bap(block->mask[ch], block->psd[ch], 0, + s->ac3dsp.bit_alloc_calc_bap(block->mask[ch], block->psd[ch], 0, s->nb_coefs[ch], snr_offset, s->bit_alloc.floor, ff_ac3_bap_tab, block->bap[ch]); diff --git a/libavcodec/ac3tab.h b/libavcodec/ac3tab.h index e3fda97..292ce0d 100644 --- a/libavcodec/ac3tab.h +++ b/libavcodec/ac3tab.h @@ -25,6 +25,12 @@ #include "libavutil/common.h" #include "ac3.h" +#if CONFIG_HARDCODED_TABLES +# define HCONST const +#else +# define HCONST +#endif + extern const uint16_t ff_ac3_frame_size_tab[38][3]; extern const uint8_t ff_ac3_channels_tab[8]; extern const uint16_t ff_ac3_channel_layout_tab[8]; @@ -44,6 +50,8 @@ extern const uint16_t ff_ac3_db_per_bit_tab[4]; extern const int16_t ff_ac3_floor_tab[8]; extern const uint16_t ff_ac3_fast_gain_tab[8]; extern const uint16_t ff_eac3_default_chmap[8]; +extern const uint8_t ff_ac3_band_start_tab[AC3_CRITICAL_BANDS+1]; +extern HCONST uint8_t ff_ac3_bin_to_band_tab[253]; /** Custom channel map locations bitmask * Other channels described in documentation: |