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Diffstat (limited to 'ffmpeg/libavcodec/aacpsy.c')
-rw-r--r--ffmpeg/libavcodec/aacpsy.c87
1 files changed, 56 insertions, 31 deletions
diff --git a/ffmpeg/libavcodec/aacpsy.c b/ffmpeg/libavcodec/aacpsy.c
index e399be5..d2a782e 100644
--- a/ffmpeg/libavcodec/aacpsy.c
+++ b/ffmpeg/libavcodec/aacpsy.c
@@ -24,6 +24,7 @@
* AAC encoder psychoacoustic model
*/
+#include "libavutil/attributes.h"
#include "libavutil/libm.h"
#include "avcodec.h"
@@ -217,6 +218,10 @@ static const float psy_fir_coeffs[] = {
-5.52212e-17 * 2, -0.313819 * 2
};
+#if ARCH_MIPS
+# include "mips/aacpsy_mips.h"
+#endif /* ARCH_MIPS */
+
/**
* Calculate the ABR attack threshold from the above LAME psymodel table.
*/
@@ -250,7 +255,8 @@ static float lame_calc_attack_threshold(int bitrate)
/**
* LAME psy model specific initialization
*/
-static void lame_window_init(AacPsyContext *ctx, AVCodecContext *avctx) {
+static av_cold void lame_window_init(AacPsyContext *ctx, AVCodecContext *avctx)
+{
int i, j;
for (i = 0; i < avctx->channels; i++) {
@@ -312,7 +318,7 @@ static av_cold int psy_3gpp_init(FFPsyContext *ctx) {
AacPsyCoeffs *coeffs = pctx->psy_coef[j];
const uint8_t *band_sizes = ctx->bands[j];
float line_to_frequency = ctx->avctx->sample_rate / (j ? 256.f : 2048.0f);
- float avg_chan_bits = chan_bitrate / ctx->avctx->sample_rate * (j ? 128.0f : 1024.0f);
+ float avg_chan_bits = chan_bitrate * (j ? 128.0f : 1024.0f) / ctx->avctx->sample_rate;
/* reference encoder uses 2.4% here instead of 60% like the spec says */
float bark_pe = 0.024f * PSY_3GPP_BITS_TO_PE(avg_chan_bits) / num_bark;
float en_spread_low = j ? PSY_3GPP_EN_SPREAD_LOW_S : PSY_3GPP_EN_SPREAD_LOW_L;
@@ -560,25 +566,12 @@ static float calc_reduced_thr_3gpp(AacPsyBand *band, float min_snr,
return thr;
}
-/**
- * Calculate band thresholds as suggested in 3GPP TS26.403
- */
-static void psy_3gpp_analyze_channel(FFPsyContext *ctx, int channel,
- const float *coefs, const FFPsyWindowInfo *wi)
+#ifndef calc_thr_3gpp
+static void calc_thr_3gpp(const FFPsyWindowInfo *wi, const int num_bands, AacPsyChannel *pch,
+ const uint8_t *band_sizes, const float *coefs)
{
- AacPsyContext *pctx = (AacPsyContext*) ctx->model_priv_data;
- AacPsyChannel *pch = &pctx->ch[channel];
- int start = 0;
int i, w, g;
- float desired_bits, desired_pe, delta_pe, reduction= NAN, spread_en[128] = {0};
- float a = 0.0f, active_lines = 0.0f, norm_fac = 0.0f;
- float pe = pctx->chan_bitrate > 32000 ? 0.0f : FFMAX(50.0f, 100.0f - pctx->chan_bitrate * 100.0f / 32000.0f);
- const int num_bands = ctx->num_bands[wi->num_windows == 8];
- const uint8_t *band_sizes = ctx->bands[wi->num_windows == 8];
- AacPsyCoeffs *coeffs = pctx->psy_coef[wi->num_windows == 8];
- const float avoid_hole_thr = wi->num_windows == 8 ? PSY_3GPP_AH_THR_SHORT : PSY_3GPP_AH_THR_LONG;
-
- //calculate energies, initial thresholds and related values - 5.4.2 "Threshold Calculation"
+ int start = 0;
for (w = 0; w < wi->num_windows*16; w += 16) {
for (g = 0; g < num_bands; g++) {
AacPsyBand *band = &pch->band[w+g];
@@ -597,6 +590,48 @@ static void psy_3gpp_analyze_channel(FFPsyContext *ctx, int channel,
start += band_sizes[g];
}
}
+}
+#endif /* calc_thr_3gpp */
+
+#ifndef psy_hp_filter
+static void psy_hp_filter(const float *firbuf, float *hpfsmpl, const float *psy_fir_coeffs)
+{
+ int i, j;
+ for (i = 0; i < AAC_BLOCK_SIZE_LONG; i++) {
+ float sum1, sum2;
+ sum1 = firbuf[i + (PSY_LAME_FIR_LEN - 1) / 2];
+ sum2 = 0.0;
+ for (j = 0; j < ((PSY_LAME_FIR_LEN - 1) / 2) - 1; j += 2) {
+ sum1 += psy_fir_coeffs[j] * (firbuf[i + j] + firbuf[i + PSY_LAME_FIR_LEN - j]);
+ sum2 += psy_fir_coeffs[j + 1] * (firbuf[i + j + 1] + firbuf[i + PSY_LAME_FIR_LEN - j - 1]);
+ }
+ /* NOTE: The LAME psymodel expects it's input in the range -32768 to 32768.
+ * Tuning this for normalized floats would be difficult. */
+ hpfsmpl[i] = (sum1 + sum2) * 32768.0f;
+ }
+}
+#endif /* psy_hp_filter */
+
+/**
+ * Calculate band thresholds as suggested in 3GPP TS26.403
+ */
+static void psy_3gpp_analyze_channel(FFPsyContext *ctx, int channel,
+ const float *coefs, const FFPsyWindowInfo *wi)
+{
+ AacPsyContext *pctx = (AacPsyContext*) ctx->model_priv_data;
+ AacPsyChannel *pch = &pctx->ch[channel];
+ int i, w, g;
+ float desired_bits, desired_pe, delta_pe, reduction= NAN, spread_en[128] = {0};
+ float a = 0.0f, active_lines = 0.0f, norm_fac = 0.0f;
+ float pe = pctx->chan_bitrate > 32000 ? 0.0f : FFMAX(50.0f, 100.0f - pctx->chan_bitrate * 100.0f / 32000.0f);
+ const int num_bands = ctx->num_bands[wi->num_windows == 8];
+ const uint8_t *band_sizes = ctx->bands[wi->num_windows == 8];
+ AacPsyCoeffs *coeffs = pctx->psy_coef[wi->num_windows == 8];
+ const float avoid_hole_thr = wi->num_windows == 8 ? PSY_3GPP_AH_THR_SHORT : PSY_3GPP_AH_THR_LONG;
+
+ //calculate energies, initial thresholds and related values - 5.4.2 "Threshold Calculation"
+ calc_thr_3gpp(wi, num_bands, pch, band_sizes, coefs);
+
//modify thresholds and energies - spread, threshold in quiet, pre-echo control
for (w = 0; w < wi->num_windows*16; w += 16) {
AacPsyBand *bands = &pch->band[w];
@@ -802,20 +837,10 @@ static FFPsyWindowInfo psy_lame_window(FFPsyContext *ctx, const float *audio,
float energy_subshort[(AAC_NUM_BLOCKS_SHORT + 1) * PSY_LAME_NUM_SUBBLOCKS];
float energy_short[AAC_NUM_BLOCKS_SHORT + 1] = { 0 };
const float *firbuf = la + (AAC_BLOCK_SIZE_SHORT/4 - PSY_LAME_FIR_LEN);
- int j, att_sum = 0;
+ int att_sum = 0;
/* LAME comment: apply high pass filter of fs/4 */
- for (i = 0; i < AAC_BLOCK_SIZE_LONG; i++) {
- float sum1, sum2;
- sum1 = firbuf[i + (PSY_LAME_FIR_LEN - 1) / 2];
- sum2 = 0.0;
- for (j = 0; j < ((PSY_LAME_FIR_LEN - 1) / 2) - 1; j += 2) {
- sum1 += psy_fir_coeffs[j] * (firbuf[i + j] + firbuf[i + PSY_LAME_FIR_LEN - j]);
- sum2 += psy_fir_coeffs[j + 1] * (firbuf[i + j + 1] + firbuf[i + PSY_LAME_FIR_LEN - j - 1]);
- }
- /* NOTE: The LAME psymodel expects it's input in the range -32768 to 32768. Tuning this for normalized floats would be difficult. */
- hpfsmpl[i] = (sum1 + sum2) * 32768.0f;
- }
+ psy_hp_filter(firbuf, hpfsmpl, psy_fir_coeffs);
/* Calculate the energies of each sub-shortblock */
for (i = 0; i < PSY_LAME_NUM_SUBBLOCKS; i++) {
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 13:40:46 +0000