diff options
Diffstat (limited to 'chromium/third_party/webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_filter_mips.c')
| -rw-r--r-- | chromium/third_party/webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_filter_mips.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/chromium/third_party/webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_filter_mips.c b/chromium/third_party/webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_filter_mips.c new file mode 100644 index 00000000000..8334f7eb18b --- /dev/null +++ b/chromium/third_party/webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_filter_mips.c @@ -0,0 +1,133 @@ +/* + * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include "webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_estimator.h" + +void WebRtcIsacfix_PitchFilterCore(int loopNumber, + int16_t gain, + int index, + int16_t sign, + int16_t* inputState, + int16_t* outputBuf2, + const int16_t* coefficient, + int16_t* inputBuf, + int16_t* outputBuf, + int* index2) { + int ind2t = *index2; + int i = 0; + int16_t* out2_pos2 = &outputBuf2[PITCH_BUFFSIZE - (index + 2)] + ind2t; + int32_t w1, w2, w3, w4, w5, gain32, sign32; + int32_t coef1, coef2, coef3, coef4, coef5 = 0; + // Define damp factors as int32_t (pair of int16_t) + int32_t kDampF0 = 0x0000F70A; + int32_t kDampF1 = 0x51EC2000; + int32_t kDampF2 = 0xF70A2000; + int16_t* input1 = inputBuf + ind2t; + int16_t* output1 = outputBuf + ind2t; + int16_t* output2 = outputBuf2 + ind2t + PITCH_BUFFSIZE; + + // Load coefficients outside the loop and sign-extend gain and sign + __asm __volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "lwl %[coef1], 3(%[coefficient]) \n\t" + "lwl %[coef2], 7(%[coefficient]) \n\t" + "lwl %[coef3], 11(%[coefficient]) \n\t" + "lwl %[coef4], 15(%[coefficient]) \n\t" + "lwr %[coef1], 0(%[coefficient]) \n\t" + "lwr %[coef2], 4(%[coefficient]) \n\t" + "lwr %[coef3], 8(%[coefficient]) \n\t" + "lwr %[coef4], 12(%[coefficient]) \n\t" + "lhu %[coef5], 16(%[coefficient]) \n\t" + "seh %[gain32], %[gain] \n\t" + "seh %[sign32], %[sign] \n\t" + ".set pop \n\t" + : [coef1] "=&r" (coef1), [coef2] "=&r" (coef2), [coef3] "=&r" (coef3), + [coef4] "=&r" (coef4), [coef5] "=&r" (coef5), [gain32] "=&r" (gain32), + [sign32] "=&r" (sign32) + : [coefficient] "r" (coefficient), [gain] "r" (gain), + [sign] "r" (sign) + : "memory" + ); + + for (i = 0; i < loopNumber; i++) { + __asm __volatile ( + ".set push \n\t" + ".set noreorder \n\t" + // Filter to get fractional pitch + "li %[w1], 8192 \n\t" + "mtlo %[w1] \n\t" + "mthi $0 \n\t" + "lwl %[w1], 3(%[out2_pos2]) \n\t" + "lwl %[w2], 7(%[out2_pos2]) \n\t" + "lwl %[w3], 11(%[out2_pos2]) \n\t" + "lwl %[w4], 15(%[out2_pos2]) \n\t" + "lwr %[w1], 0(%[out2_pos2]) \n\t" + "lwr %[w2], 4(%[out2_pos2]) \n\t" + "lwr %[w3], 8(%[out2_pos2]) \n\t" + "lwr %[w4], 12(%[out2_pos2]) \n\t" + "lhu %[w5], 16(%[out2_pos2]) \n\t" + "dpa.w.ph $ac0, %[w1], %[coef1] \n\t" + "dpa.w.ph $ac0, %[w2], %[coef2] \n\t" + "dpa.w.ph $ac0, %[w3], %[coef3] \n\t" + "dpa.w.ph $ac0, %[w4], %[coef4] \n\t" + "dpa.w.ph $ac0, %[w5], %[coef5] \n\t" + "addiu %[out2_pos2], %[out2_pos2], 2 \n\t" + "mthi $0, $ac1 \n\t" + "lwl %[w2], 3(%[inputState]) \n\t" + "lwl %[w3], 7(%[inputState]) \n\t" + // Fractional pitch shift & saturation + "extr_s.h %[w1], $ac0, 14 \n\t" + "li %[w4], 16384 \n\t" + "lwr %[w2], 0(%[inputState]) \n\t" + "lwr %[w3], 4(%[inputState]) \n\t" + "mtlo %[w4], $ac1 \n\t" + // Shift low pass filter state + "swl %[w2], 5(%[inputState]) \n\t" + "swl %[w3], 9(%[inputState]) \n\t" + "mul %[w1], %[gain32], %[w1] \n\t" + "swr %[w2], 2(%[inputState]) \n\t" + "swr %[w3], 6(%[inputState]) \n\t" + // Low pass filter accumulation + "dpa.w.ph $ac1, %[kDampF1], %[w2] \n\t" + "dpa.w.ph $ac1, %[kDampF2], %[w3] \n\t" + "lh %[w4], 0(%[input1]) \n\t" + "addiu %[input1], %[input1], 2 \n\t" + "shra_r.w %[w1], %[w1], 12 \n\t" + "sh %[w1], 0(%[inputState]) \n\t" + "dpa.w.ph $ac1, %[kDampF0], %[w1] \n\t" + // Low pass filter shift & saturation + "extr_s.h %[w2], $ac1, 15 \n\t" + "mul %[w2], %[w2], %[sign32] \n\t" + // Buffer update + "subu %[w2], %[w4], %[w2] \n\t" + "shll_s.w %[w2], %[w2], 16 \n\t" + "sra %[w2], %[w2], 16 \n\t" + "sh %[w2], 0(%[output1]) \n\t" + "addu %[w2], %[w2], %[w4] \n\t" + "shll_s.w %[w2], %[w2], 16 \n\t" + "addiu %[output1], %[output1], 2 \n\t" + "sra %[w2], %[w2], 16 \n\t" + "sh %[w2], 0(%[output2]) \n\t" + "addiu %[output2], %[output2], 2 \n\t" + ".set pop \n\t" + : [w1] "=&r" (w1), [w2] "=&r" (w2), [w3] "=&r" (w3), [w4] "=&r" (w4), + [w5] "=&r" (w5), [input1] "+r" (input1), [out2_pos2] "+r" (out2_pos2), + [output1] "+r" (output1), [output2] "+r" (output2) + : [coefficient] "r" (coefficient), [inputState] "r" (inputState), + [gain32] "r" (gain32), [sign32] "r" (sign32), [kDampF0] "r" (kDampF0), + [kDampF1] "r" (kDampF1), [kDampF2] "r" (kDampF2), + [coef1] "r" (coef1), [coef2] "r" (coef2), [coef3] "r" (coef3), + [coef4] "r" (coef4), [coef5] "r" (coef5) + : "hi", "lo", "$ac1hi", "$ac1lo", "memory" + ); + } + (*index2) += loopNumber; +} |