making act segmenter

1 files changed, 109 insertions, 0 deletions

diff --git a/ffmpeg/libavcodec/sipr.h b/ffmpeg/libavcodec/sipr.h
new file mode 100644
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+++ b/ffmpeg/libavcodec/sipr.h
@@ -0,0 +1,109 @@
+/*
+ * SIPR / ACELP.NET decoder
+ *
+ * Copyright (c) 2008 Vladimir Voroshilov
+ * Copyright (c) 2009 Vitor Sessak
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_SIPR_H
+#define AVCODEC_SIPR_H
+
+#include "avcodec.h"
+#include "acelp_pitch_delay.h"
+#include "libavutil/mem.h"
+
+#define LP_FILTER_ORDER_16k  16
+#define L_SUBFR_16k          80
+#define PITCH_MIN            30
+#define PITCH_MAX            281
+
+#define LSFQ_DIFF_MIN        (0.0125 * M_PI)
+
+#define LP_FILTER_ORDER      10
+
+/** Number of past samples needed for excitation interpolation */
+#define L_INTERPOL           (LP_FILTER_ORDER + 1)
+
+/**  Subframe size for all modes except 16k */
+#define SUBFR_SIZE           48
+
+#define SUBFRAME_COUNT_16k   2
+
+typedef enum {
+    MODE_16k,
+    MODE_8k5,
+    MODE_6k5,
+    MODE_5k0,
+    MODE_COUNT
+} SiprMode;
+
+typedef struct SiprParameters {
+    int ma_pred_switch;        ///< switched moving average predictor
+    int vq_indexes[5];
+    int pitch_delay[5];        ///< pitch delay
+    int gp_index[5];           ///< adaptive-codebook gain indexes
+    int16_t fc_indexes[5][10]; ///< fixed-codebook indexes
+    int gc_index[5];           ///< fixed-codebook gain indexes
+} SiprParameters;
+
+typedef struct SiprContext {
+    AVCodecContext *avctx;
+
+    SiprMode mode;
+
+    float past_pitch_gain;
+    float lsf_history[LP_FILTER_ORDER_16k];
+
+    float excitation[L_INTERPOL + PITCH_MAX + 2 * L_SUBFR_16k];
+
+    DECLARE_ALIGNED(16, float, synth_buf)[LP_FILTER_ORDER + 5*SUBFR_SIZE + 6];
+
+    float lsp_history[LP_FILTER_ORDER];
+    float gain_mem;
+    float energy_history[4];
+    float highpass_filt_mem[2];
+    float postfilter_mem[PITCH_DELAY_MAX + LP_FILTER_ORDER];
+
+    /* 5k0 */
+    float tilt_mem;
+    float postfilter_agc;
+    float postfilter_mem5k0[PITCH_DELAY_MAX + LP_FILTER_ORDER];
+    float postfilter_syn5k0[LP_FILTER_ORDER + SUBFR_SIZE*5];
+
+    /* 16k */
+    int pitch_lag_prev;
+    float iir_mem[LP_FILTER_ORDER_16k+1];
+    float filt_buf[2][LP_FILTER_ORDER_16k+1];
+    float *filt_mem[2];
+    float mem_preemph[LP_FILTER_ORDER_16k];
+    float synth[LP_FILTER_ORDER_16k];
+    double lsp_history_16k[16];
+
+    void (*decode_frame)(struct SiprContext *ctx, SiprParameters *params,
+                         float *out_data);
+} SiprContext;
+
+extern const float ff_pow_0_5[16];
+
+void ff_sipr_init_16k(SiprContext *ctx);
+
+void ff_sipr_decode_frame_16k(SiprContext *ctx, SiprParameters *params,
+                              float *out_data);
+
+#endif /* AVCODEC_SIPR_H */