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970 lines
28 KiB
C
970 lines
28 KiB
C
/* Copyright (c) 2010 Xiph.Org Foundation, Skype Limited
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Written by Jean-Marc Valin and Koen Vos */
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifndef OPUS_BUILD
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# error "OPUS_BUILD _MUST_ be defined to build Opus. This probably means you need other defines as well, as in a config.h. See the included build files for details."
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#endif
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#if defined(__GNUC__) && (__GNUC__ >= 2) && !defined(__OPTIMIZE__) && !defined(__APPLE__)
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# pragma message "You appear to be compiling without optimization, if so opus will be very slow."
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#endif
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#include <stdarg.h>
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#include "celt.h"
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#include "opus.h"
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#include "entdec.h"
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#include "modes.h"
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#include "API.h"
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#include "stack_alloc.h"
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#include "float_cast.h"
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#include "opus_private.h"
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#include "os_support.h"
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#include "structs.h"
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#include "define.h"
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#include "mathops.h"
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#include "cpu_support.h"
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struct OpusDecoder {
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int celt_dec_offset;
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int silk_dec_offset;
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int channels;
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opus_int32 Fs; /** Sampling rate (at the API level) */
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silk_DecControlStruct DecControl;
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int decode_gain;
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/* Everything beyond this point gets cleared on a reset */
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#define OPUS_DECODER_RESET_START stream_channels
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int stream_channels;
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int bandwidth;
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int mode;
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int prev_mode;
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int frame_size;
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int prev_redundancy;
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int last_packet_duration;
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#ifndef FIXED_POINT
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opus_val16 softclip_mem[2];
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#endif
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opus_uint32 rangeFinal;
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};
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#ifdef FIXED_POINT
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static OPUS_INLINE opus_int16 SAT16(opus_int32 x) {
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return x > 32767 ? 32767 : x < -32768 ? -32768 : (opus_int16)x;
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}
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#endif
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int opus_decoder_get_size(int channels)
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{
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int silkDecSizeBytes, celtDecSizeBytes;
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int ret;
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if (channels<1 || channels > 2)
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return 0;
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ret = silk_Get_Decoder_Size( &silkDecSizeBytes );
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if(ret)
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return 0;
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silkDecSizeBytes = align(silkDecSizeBytes);
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celtDecSizeBytes = celt_decoder_get_size(channels);
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return align(sizeof(OpusDecoder))+silkDecSizeBytes+celtDecSizeBytes;
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}
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int opus_decoder_init(OpusDecoder *st, opus_int32 Fs, int channels)
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{
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void *silk_dec;
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CELTDecoder *celt_dec;
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int ret, silkDecSizeBytes;
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if ((Fs!=48000&&Fs!=24000&&Fs!=16000&&Fs!=12000&&Fs!=8000)
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|| (channels!=1&&channels!=2))
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return OPUS_BAD_ARG;
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OPUS_CLEAR((char*)st, opus_decoder_get_size(channels));
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/* Initialize SILK encoder */
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ret = silk_Get_Decoder_Size(&silkDecSizeBytes);
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if (ret)
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return OPUS_INTERNAL_ERROR;
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silkDecSizeBytes = align(silkDecSizeBytes);
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st->silk_dec_offset = align(sizeof(OpusDecoder));
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st->celt_dec_offset = st->silk_dec_offset+silkDecSizeBytes;
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silk_dec = (char*)st+st->silk_dec_offset;
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celt_dec = (CELTDecoder*)((char*)st+st->celt_dec_offset);
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st->stream_channels = st->channels = channels;
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st->Fs = Fs;
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st->DecControl.API_sampleRate = st->Fs;
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st->DecControl.nChannelsAPI = st->channels;
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/* Reset decoder */
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ret = silk_InitDecoder( silk_dec );
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if(ret)return OPUS_INTERNAL_ERROR;
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/* Initialize CELT decoder */
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ret = celt_decoder_init(celt_dec, Fs, channels);
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if(ret!=OPUS_OK)return OPUS_INTERNAL_ERROR;
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celt_decoder_ctl(celt_dec, CELT_SET_SIGNALLING(0));
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st->prev_mode = 0;
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st->frame_size = Fs/400;
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return OPUS_OK;
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}
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OpusDecoder *opus_decoder_create(opus_int32 Fs, int channels, int *error)
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{
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int ret;
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OpusDecoder *st;
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if ((Fs!=48000&&Fs!=24000&&Fs!=16000&&Fs!=12000&&Fs!=8000)
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|| (channels!=1&&channels!=2))
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{
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if (error)
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*error = OPUS_BAD_ARG;
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return NULL;
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}
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st = (OpusDecoder *)opus_alloc(opus_decoder_get_size(channels));
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if (st == NULL)
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{
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if (error)
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*error = OPUS_ALLOC_FAIL;
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return NULL;
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}
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ret = opus_decoder_init(st, Fs, channels);
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if (error)
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*error = ret;
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if (ret != OPUS_OK)
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{
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opus_free(st);
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st = NULL;
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}
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return st;
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}
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static void smooth_fade(const opus_val16 *in1, const opus_val16 *in2,
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opus_val16 *out, int overlap, int channels,
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const opus_val16 *window, opus_int32 Fs)
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{
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int i, c;
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int inc = 48000/Fs;
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for (c=0;c<channels;c++)
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{
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for (i=0;i<overlap;i++)
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{
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opus_val16 w = MULT16_16_Q15(window[i*inc], window[i*inc]);
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out[i*channels+c] = SHR32(MAC16_16(MULT16_16(w,in2[i*channels+c]),
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Q15ONE-w, in1[i*channels+c]), 15);
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}
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}
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}
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static int opus_packet_get_mode(const unsigned char *data)
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{
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int mode;
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if (data[0]&0x80)
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{
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mode = MODE_CELT_ONLY;
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} else if ((data[0]&0x60) == 0x60)
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{
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mode = MODE_HYBRID;
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} else {
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mode = MODE_SILK_ONLY;
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}
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return mode;
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}
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static int opus_decode_frame(OpusDecoder *st, const unsigned char *data,
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opus_int32 len, opus_val16 *pcm, int frame_size, int decode_fec)
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{
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void *silk_dec;
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CELTDecoder *celt_dec;
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int i, silk_ret=0, celt_ret=0;
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ec_dec dec;
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opus_int32 silk_frame_size;
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int pcm_silk_size;
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VARDECL(opus_int16, pcm_silk);
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int pcm_transition_silk_size;
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VARDECL(opus_val16, pcm_transition_silk);
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int pcm_transition_celt_size;
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VARDECL(opus_val16, pcm_transition_celt);
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opus_val16 *pcm_transition=NULL;
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int redundant_audio_size;
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VARDECL(opus_val16, redundant_audio);
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int audiosize;
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int mode;
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int transition=0;
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int start_band;
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int redundancy=0;
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int redundancy_bytes = 0;
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int celt_to_silk=0;
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int c;
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int F2_5, F5, F10, F20;
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const opus_val16 *window;
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opus_uint32 redundant_rng = 0;
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ALLOC_STACK;
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silk_dec = (char*)st+st->silk_dec_offset;
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celt_dec = (CELTDecoder*)((char*)st+st->celt_dec_offset);
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F20 = st->Fs/50;
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F10 = F20>>1;
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F5 = F10>>1;
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F2_5 = F5>>1;
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if (frame_size < F2_5)
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{
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RESTORE_STACK;
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return OPUS_BUFFER_TOO_SMALL;
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}
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/* Limit frame_size to avoid excessive stack allocations. */
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frame_size = IMIN(frame_size, st->Fs/25*3);
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/* Payloads of 1 (2 including ToC) or 0 trigger the PLC/DTX */
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if (len<=1)
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{
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data = NULL;
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/* In that case, don't conceal more than what the ToC says */
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frame_size = IMIN(frame_size, st->frame_size);
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}
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if (data != NULL)
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{
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audiosize = st->frame_size;
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mode = st->mode;
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ec_dec_init(&dec,(unsigned char*)data,len);
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} else {
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audiosize = frame_size;
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mode = st->prev_mode;
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if (mode == 0)
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{
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/* If we haven't got any packet yet, all we can do is return zeros */
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for (i=0;i<audiosize*st->channels;i++)
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pcm[i] = 0;
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RESTORE_STACK;
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return audiosize;
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}
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/* Avoids trying to run the PLC on sizes other than 2.5 (CELT), 5 (CELT),
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10, or 20 (e.g. 12.5 or 30 ms). */
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if (audiosize > F20)
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{
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do {
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int ret = opus_decode_frame(st, NULL, 0, pcm, IMIN(audiosize, F20), 0);
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if (ret<0)
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{
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RESTORE_STACK;
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return ret;
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}
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pcm += ret*st->channels;
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audiosize -= ret;
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} while (audiosize > 0);
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RESTORE_STACK;
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return frame_size;
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} else if (audiosize < F20)
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{
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if (audiosize > F10)
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audiosize = F10;
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else if (mode != MODE_SILK_ONLY && audiosize > F5 && audiosize < F10)
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audiosize = F5;
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}
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}
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pcm_transition_silk_size = ALLOC_NONE;
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pcm_transition_celt_size = ALLOC_NONE;
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if (data!=NULL && st->prev_mode > 0 && (
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(mode == MODE_CELT_ONLY && st->prev_mode != MODE_CELT_ONLY && !st->prev_redundancy)
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|| (mode != MODE_CELT_ONLY && st->prev_mode == MODE_CELT_ONLY) )
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)
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{
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transition = 1;
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/* Decide where to allocate the stack memory for pcm_transition */
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if (mode == MODE_CELT_ONLY)
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pcm_transition_celt_size = F5*st->channels;
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else
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pcm_transition_silk_size = F5*st->channels;
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}
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ALLOC(pcm_transition_celt, pcm_transition_celt_size, opus_val16);
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if (transition && mode == MODE_CELT_ONLY)
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{
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pcm_transition = pcm_transition_celt;
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opus_decode_frame(st, NULL, 0, pcm_transition, IMIN(F5, audiosize), 0);
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}
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if (audiosize > frame_size)
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{
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/*fprintf(stderr, "PCM buffer too small: %d vs %d (mode = %d)\n", audiosize, frame_size, mode);*/
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RESTORE_STACK;
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return OPUS_BAD_ARG;
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} else {
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frame_size = audiosize;
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}
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/* Don't allocate any memory when in CELT-only mode */
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pcm_silk_size = (mode != MODE_CELT_ONLY) ? IMAX(F10, frame_size)*st->channels : ALLOC_NONE;
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ALLOC(pcm_silk, pcm_silk_size, opus_int16);
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/* SILK processing */
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if (mode != MODE_CELT_ONLY)
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{
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int lost_flag, decoded_samples;
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opus_int16 *pcm_ptr = pcm_silk;
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if (st->prev_mode==MODE_CELT_ONLY)
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silk_InitDecoder( silk_dec );
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/* The SILK PLC cannot produce frames of less than 10 ms */
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st->DecControl.payloadSize_ms = IMAX(10, 1000 * audiosize / st->Fs);
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if (data != NULL)
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{
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st->DecControl.nChannelsInternal = st->stream_channels;
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if( mode == MODE_SILK_ONLY ) {
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if( st->bandwidth == OPUS_BANDWIDTH_NARROWBAND ) {
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st->DecControl.internalSampleRate = 8000;
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} else if( st->bandwidth == OPUS_BANDWIDTH_MEDIUMBAND ) {
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st->DecControl.internalSampleRate = 12000;
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} else if( st->bandwidth == OPUS_BANDWIDTH_WIDEBAND ) {
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st->DecControl.internalSampleRate = 16000;
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} else {
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st->DecControl.internalSampleRate = 16000;
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silk_assert( 0 );
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}
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} else {
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/* Hybrid mode */
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st->DecControl.internalSampleRate = 16000;
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}
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}
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lost_flag = data == NULL ? 1 : 2 * decode_fec;
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decoded_samples = 0;
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do {
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/* Call SILK decoder */
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int first_frame = decoded_samples == 0;
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silk_ret = silk_Decode( silk_dec, &st->DecControl,
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lost_flag, first_frame, &dec, pcm_ptr, &silk_frame_size );
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if( silk_ret ) {
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if (lost_flag) {
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/* PLC failure should not be fatal */
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silk_frame_size = frame_size;
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for (i=0;i<frame_size*st->channels;i++)
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pcm_ptr[i] = 0;
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} else {
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RESTORE_STACK;
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return OPUS_INTERNAL_ERROR;
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}
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}
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pcm_ptr += silk_frame_size * st->channels;
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decoded_samples += silk_frame_size;
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} while( decoded_samples < frame_size );
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}
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start_band = 0;
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if (!decode_fec && mode != MODE_CELT_ONLY && data != NULL
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&& ec_tell(&dec)+17+20*(st->mode == MODE_HYBRID) <= 8*len)
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{
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/* Check if we have a redundant 0-8 kHz band */
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if (mode == MODE_HYBRID)
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redundancy = ec_dec_bit_logp(&dec, 12);
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else
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redundancy = 1;
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if (redundancy)
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{
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celt_to_silk = ec_dec_bit_logp(&dec, 1);
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/* redundancy_bytes will be at least two, in the non-hybrid
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case due to the ec_tell() check above */
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redundancy_bytes = mode==MODE_HYBRID ?
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(opus_int32)ec_dec_uint(&dec, 256)+2 :
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len-((ec_tell(&dec)+7)>>3);
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len -= redundancy_bytes;
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/* This is a sanity check. It should never happen for a valid
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packet, so the exact behaviour is not normative. */
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if (len*8 < ec_tell(&dec))
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{
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len = 0;
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redundancy_bytes = 0;
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redundancy = 0;
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}
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/* Shrink decoder because of raw bits */
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dec.storage -= redundancy_bytes;
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}
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}
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if (mode != MODE_CELT_ONLY)
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start_band = 17;
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{
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int endband=21;
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switch(st->bandwidth)
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{
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case OPUS_BANDWIDTH_NARROWBAND:
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endband = 13;
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break;
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case OPUS_BANDWIDTH_MEDIUMBAND:
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case OPUS_BANDWIDTH_WIDEBAND:
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endband = 17;
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break;
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case OPUS_BANDWIDTH_SUPERWIDEBAND:
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endband = 19;
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break;
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case OPUS_BANDWIDTH_FULLBAND:
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endband = 21;
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break;
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}
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celt_decoder_ctl(celt_dec, CELT_SET_END_BAND(endband));
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celt_decoder_ctl(celt_dec, CELT_SET_CHANNELS(st->stream_channels));
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}
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if (redundancy)
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{
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transition = 0;
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pcm_transition_silk_size=ALLOC_NONE;
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}
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ALLOC(pcm_transition_silk, pcm_transition_silk_size, opus_val16);
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if (transition && mode != MODE_CELT_ONLY)
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{
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pcm_transition = pcm_transition_silk;
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opus_decode_frame(st, NULL, 0, pcm_transition, IMIN(F5, audiosize), 0);
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}
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/* Only allocation memory for redundancy if/when needed */
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redundant_audio_size = redundancy ? F5*st->channels : ALLOC_NONE;
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ALLOC(redundant_audio, redundant_audio_size, opus_val16);
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/* 5 ms redundant frame for CELT->SILK*/
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if (redundancy && celt_to_silk)
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{
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celt_decoder_ctl(celt_dec, CELT_SET_START_BAND(0));
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celt_decode_with_ec(celt_dec, data+len, redundancy_bytes,
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redundant_audio, F5, NULL);
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celt_decoder_ctl(celt_dec, OPUS_GET_FINAL_RANGE(&redundant_rng));
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}
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/* MUST be after PLC */
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celt_decoder_ctl(celt_dec, CELT_SET_START_BAND(start_band));
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if (mode != MODE_SILK_ONLY)
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{
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int celt_frame_size = IMIN(F20, frame_size);
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/* Make sure to discard any previous CELT state */
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if (mode != st->prev_mode && st->prev_mode > 0 && !st->prev_redundancy)
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celt_decoder_ctl(celt_dec, OPUS_RESET_STATE);
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/* Decode CELT */
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celt_ret = celt_decode_with_ec(celt_dec, decode_fec ? NULL : data,
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len, pcm, celt_frame_size, &dec);
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} else {
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unsigned char silence[2] = {0xFF, 0xFF};
|
|
for (i=0;i<frame_size*st->channels;i++)
|
|
pcm[i] = 0;
|
|
/* For hybrid -> SILK transitions, we let the CELT MDCT
|
|
do a fade-out by decoding a silence frame */
|
|
if (st->prev_mode == MODE_HYBRID && !(redundancy && celt_to_silk && st->prev_redundancy) )
|
|
{
|
|
celt_decoder_ctl(celt_dec, CELT_SET_START_BAND(0));
|
|
celt_decode_with_ec(celt_dec, silence, 2, pcm, F2_5, NULL);
|
|
}
|
|
}
|
|
|
|
if (mode != MODE_CELT_ONLY)
|
|
{
|
|
#ifdef FIXED_POINT
|
|
for (i=0;i<frame_size*st->channels;i++)
|
|
pcm[i] = SAT16(pcm[i] + pcm_silk[i]);
|
|
#else
|
|
for (i=0;i<frame_size*st->channels;i++)
|
|
pcm[i] = pcm[i] + (opus_val16)((1.f/32768.f)*pcm_silk[i]);
|
|
#endif
|
|
}
|
|
|
|
{
|
|
const CELTMode *celt_mode;
|
|
celt_decoder_ctl(celt_dec, CELT_GET_MODE(&celt_mode));
|
|
window = celt_mode->window;
|
|
}
|
|
|
|
/* 5 ms redundant frame for SILK->CELT */
|
|
if (redundancy && !celt_to_silk)
|
|
{
|
|
celt_decoder_ctl(celt_dec, OPUS_RESET_STATE);
|
|
celt_decoder_ctl(celt_dec, CELT_SET_START_BAND(0));
|
|
|
|
celt_decode_with_ec(celt_dec, data+len, redundancy_bytes, redundant_audio, F5, NULL);
|
|
celt_decoder_ctl(celt_dec, OPUS_GET_FINAL_RANGE(&redundant_rng));
|
|
smooth_fade(pcm+st->channels*(frame_size-F2_5), redundant_audio+st->channels*F2_5,
|
|
pcm+st->channels*(frame_size-F2_5), F2_5, st->channels, window, st->Fs);
|
|
}
|
|
if (redundancy && celt_to_silk)
|
|
{
|
|
for (c=0;c<st->channels;c++)
|
|
{
|
|
for (i=0;i<F2_5;i++)
|
|
pcm[st->channels*i+c] = redundant_audio[st->channels*i+c];
|
|
}
|
|
smooth_fade(redundant_audio+st->channels*F2_5, pcm+st->channels*F2_5,
|
|
pcm+st->channels*F2_5, F2_5, st->channels, window, st->Fs);
|
|
}
|
|
if (transition)
|
|
{
|
|
if (audiosize >= F5)
|
|
{
|
|
for (i=0;i<st->channels*F2_5;i++)
|
|
pcm[i] = pcm_transition[i];
|
|
smooth_fade(pcm_transition+st->channels*F2_5, pcm+st->channels*F2_5,
|
|
pcm+st->channels*F2_5, F2_5,
|
|
st->channels, window, st->Fs);
|
|
} else {
|
|
/* Not enough time to do a clean transition, but we do it anyway
|
|
This will not preserve amplitude perfectly and may introduce
|
|
a bit of temporal aliasing, but it shouldn't be too bad and
|
|
that's pretty much the best we can do. In any case, generating this
|
|
transition it pretty silly in the first place */
|
|
smooth_fade(pcm_transition, pcm,
|
|
pcm, F2_5,
|
|
st->channels, window, st->Fs);
|
|
}
|
|
}
|
|
|
|
if(st->decode_gain)
|
|
{
|
|
opus_val32 gain;
|
|
gain = celt_exp2(MULT16_16_P15(QCONST16(6.48814081e-4f, 25), st->decode_gain));
|
|
for (i=0;i<frame_size*st->channels;i++)
|
|
{
|
|
opus_val32 x;
|
|
x = MULT16_32_P16(pcm[i],gain);
|
|
pcm[i] = SATURATE(x, 32767);
|
|
}
|
|
}
|
|
|
|
if (len <= 1)
|
|
st->rangeFinal = 0;
|
|
else
|
|
st->rangeFinal = dec.rng ^ redundant_rng;
|
|
|
|
st->prev_mode = mode;
|
|
st->prev_redundancy = redundancy && !celt_to_silk;
|
|
|
|
if (celt_ret>=0)
|
|
{
|
|
if (OPUS_CHECK_ARRAY(pcm, audiosize*st->channels))
|
|
OPUS_PRINT_INT(audiosize);
|
|
}
|
|
|
|
RESTORE_STACK;
|
|
return celt_ret < 0 ? celt_ret : audiosize;
|
|
|
|
}
|
|
|
|
int opus_decode_native(OpusDecoder *st, const unsigned char *data,
|
|
opus_int32 len, opus_val16 *pcm, int frame_size, int decode_fec,
|
|
int self_delimited, opus_int32 *packet_offset, int soft_clip)
|
|
{
|
|
int i, nb_samples;
|
|
int count, offset;
|
|
unsigned char toc;
|
|
int packet_frame_size, packet_bandwidth, packet_mode, packet_stream_channels;
|
|
/* 48 x 2.5 ms = 120 ms */
|
|
opus_int16 size[48];
|
|
if (decode_fec<0 || decode_fec>1)
|
|
return OPUS_BAD_ARG;
|
|
/* For FEC/PLC, frame_size has to be to have a multiple of 2.5 ms */
|
|
if ((decode_fec || len==0 || data==NULL) && frame_size%(st->Fs/400)!=0)
|
|
return OPUS_BAD_ARG;
|
|
if (len==0 || data==NULL)
|
|
{
|
|
int pcm_count=0;
|
|
do {
|
|
int ret;
|
|
ret = opus_decode_frame(st, NULL, 0, pcm+pcm_count*st->channels, frame_size-pcm_count, 0);
|
|
if (ret<0)
|
|
return ret;
|
|
pcm_count += ret;
|
|
} while (pcm_count < frame_size);
|
|
celt_assert(pcm_count == frame_size);
|
|
if (OPUS_CHECK_ARRAY(pcm, pcm_count*st->channels))
|
|
OPUS_PRINT_INT(pcm_count);
|
|
st->last_packet_duration = pcm_count;
|
|
return pcm_count;
|
|
} else if (len<0)
|
|
return OPUS_BAD_ARG;
|
|
|
|
packet_mode = opus_packet_get_mode(data);
|
|
packet_bandwidth = opus_packet_get_bandwidth(data);
|
|
packet_frame_size = opus_packet_get_samples_per_frame(data, st->Fs);
|
|
packet_stream_channels = opus_packet_get_nb_channels(data);
|
|
|
|
count = opus_packet_parse_impl(data, len, self_delimited, &toc, NULL,
|
|
size, &offset, packet_offset);
|
|
if (count<0)
|
|
return count;
|
|
|
|
data += offset;
|
|
|
|
if (decode_fec)
|
|
{
|
|
int duration_copy;
|
|
int ret;
|
|
/* If no FEC can be present, run the PLC (recursive call) */
|
|
if (frame_size < packet_frame_size || packet_mode == MODE_CELT_ONLY || st->mode == MODE_CELT_ONLY)
|
|
return opus_decode_native(st, NULL, 0, pcm, frame_size, 0, 0, NULL, soft_clip);
|
|
/* Otherwise, run the PLC on everything except the size for which we might have FEC */
|
|
duration_copy = st->last_packet_duration;
|
|
if (frame_size-packet_frame_size!=0)
|
|
{
|
|
ret = opus_decode_native(st, NULL, 0, pcm, frame_size-packet_frame_size, 0, 0, NULL, soft_clip);
|
|
if (ret<0)
|
|
{
|
|
st->last_packet_duration = duration_copy;
|
|
return ret;
|
|
}
|
|
celt_assert(ret==frame_size-packet_frame_size);
|
|
}
|
|
/* Complete with FEC */
|
|
st->mode = packet_mode;
|
|
st->bandwidth = packet_bandwidth;
|
|
st->frame_size = packet_frame_size;
|
|
st->stream_channels = packet_stream_channels;
|
|
ret = opus_decode_frame(st, data, size[0], pcm+st->channels*(frame_size-packet_frame_size),
|
|
packet_frame_size, 1);
|
|
if (ret<0)
|
|
return ret;
|
|
else {
|
|
if (OPUS_CHECK_ARRAY(pcm, frame_size*st->channels))
|
|
OPUS_PRINT_INT(frame_size);
|
|
st->last_packet_duration = frame_size;
|
|
return frame_size;
|
|
}
|
|
}
|
|
|
|
if (count*packet_frame_size > frame_size)
|
|
return OPUS_BUFFER_TOO_SMALL;
|
|
|
|
/* Update the state as the last step to avoid updating it on an invalid packet */
|
|
st->mode = packet_mode;
|
|
st->bandwidth = packet_bandwidth;
|
|
st->frame_size = packet_frame_size;
|
|
st->stream_channels = packet_stream_channels;
|
|
|
|
nb_samples=0;
|
|
for (i=0;i<count;i++)
|
|
{
|
|
int ret;
|
|
ret = opus_decode_frame(st, data, size[i], pcm+nb_samples*st->channels, frame_size-nb_samples, 0);
|
|
if (ret<0)
|
|
return ret;
|
|
celt_assert(ret==packet_frame_size);
|
|
data += size[i];
|
|
nb_samples += ret;
|
|
}
|
|
st->last_packet_duration = nb_samples;
|
|
if (OPUS_CHECK_ARRAY(pcm, nb_samples*st->channels))
|
|
OPUS_PRINT_INT(nb_samples);
|
|
#ifndef FIXED_POINT
|
|
if (soft_clip)
|
|
opus_pcm_soft_clip(pcm, nb_samples, st->channels, st->softclip_mem);
|
|
else
|
|
st->softclip_mem[0]=st->softclip_mem[1]=0;
|
|
#endif
|
|
return nb_samples;
|
|
}
|
|
|
|
#ifdef FIXED_POINT
|
|
|
|
int opus_decode(OpusDecoder *st, const unsigned char *data,
|
|
opus_int32 len, opus_val16 *pcm, int frame_size, int decode_fec)
|
|
{
|
|
if(frame_size<=0)
|
|
return OPUS_BAD_ARG;
|
|
return opus_decode_native(st, data, len, pcm, frame_size, decode_fec, 0, NULL, 0);
|
|
}
|
|
|
|
#ifndef DISABLE_FLOAT_API
|
|
int opus_decode_float(OpusDecoder *st, const unsigned char *data,
|
|
opus_int32 len, float *pcm, int frame_size, int decode_fec)
|
|
{
|
|
VARDECL(opus_int16, out);
|
|
int ret, i;
|
|
ALLOC_STACK;
|
|
|
|
if(frame_size<=0)
|
|
{
|
|
RESTORE_STACK;
|
|
return OPUS_BAD_ARG;
|
|
}
|
|
ALLOC(out, frame_size*st->channels, opus_int16);
|
|
|
|
ret = opus_decode_native(st, data, len, out, frame_size, decode_fec, 0, NULL, 0);
|
|
if (ret > 0)
|
|
{
|
|
for (i=0;i<ret*st->channels;i++)
|
|
pcm[i] = (1.f/32768.f)*(out[i]);
|
|
}
|
|
RESTORE_STACK;
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
|
|
#else
|
|
int opus_decode(OpusDecoder *st, const unsigned char *data,
|
|
opus_int32 len, opus_int16 *pcm, int frame_size, int decode_fec)
|
|
{
|
|
VARDECL(float, out);
|
|
int ret, i;
|
|
ALLOC_STACK;
|
|
|
|
if(frame_size<=0)
|
|
{
|
|
RESTORE_STACK;
|
|
return OPUS_BAD_ARG;
|
|
}
|
|
|
|
ALLOC(out, frame_size*st->channels, float);
|
|
|
|
ret = opus_decode_native(st, data, len, out, frame_size, decode_fec, 0, NULL, 1);
|
|
if (ret > 0)
|
|
{
|
|
for (i=0;i<ret*st->channels;i++)
|
|
pcm[i] = FLOAT2INT16(out[i]);
|
|
}
|
|
RESTORE_STACK;
|
|
return ret;
|
|
}
|
|
|
|
int opus_decode_float(OpusDecoder *st, const unsigned char *data,
|
|
opus_int32 len, opus_val16 *pcm, int frame_size, int decode_fec)
|
|
{
|
|
if(frame_size<=0)
|
|
return OPUS_BAD_ARG;
|
|
return opus_decode_native(st, data, len, pcm, frame_size, decode_fec, 0, NULL, 0);
|
|
}
|
|
|
|
#endif
|
|
|
|
int opus_decoder_ctl(OpusDecoder *st, int request, ...)
|
|
{
|
|
int ret = OPUS_OK;
|
|
va_list ap;
|
|
void *silk_dec;
|
|
CELTDecoder *celt_dec;
|
|
|
|
silk_dec = (char*)st+st->silk_dec_offset;
|
|
celt_dec = (CELTDecoder*)((char*)st+st->celt_dec_offset);
|
|
|
|
|
|
va_start(ap, request);
|
|
|
|
switch (request)
|
|
{
|
|
case OPUS_GET_BANDWIDTH_REQUEST:
|
|
{
|
|
opus_int32 *value = va_arg(ap, opus_int32*);
|
|
if (!value)
|
|
{
|
|
goto bad_arg;
|
|
}
|
|
*value = st->bandwidth;
|
|
}
|
|
break;
|
|
case OPUS_GET_FINAL_RANGE_REQUEST:
|
|
{
|
|
opus_uint32 *value = va_arg(ap, opus_uint32*);
|
|
if (!value)
|
|
{
|
|
goto bad_arg;
|
|
}
|
|
*value = st->rangeFinal;
|
|
}
|
|
break;
|
|
case OPUS_RESET_STATE:
|
|
{
|
|
OPUS_CLEAR((char*)&st->OPUS_DECODER_RESET_START,
|
|
sizeof(OpusDecoder)-
|
|
((char*)&st->OPUS_DECODER_RESET_START - (char*)st));
|
|
|
|
celt_decoder_ctl(celt_dec, OPUS_RESET_STATE);
|
|
silk_InitDecoder( silk_dec );
|
|
st->stream_channels = st->channels;
|
|
st->frame_size = st->Fs/400;
|
|
}
|
|
break;
|
|
case OPUS_GET_SAMPLE_RATE_REQUEST:
|
|
{
|
|
opus_int32 *value = va_arg(ap, opus_int32*);
|
|
if (!value)
|
|
{
|
|
goto bad_arg;
|
|
}
|
|
*value = st->Fs;
|
|
}
|
|
break;
|
|
case OPUS_GET_PITCH_REQUEST:
|
|
{
|
|
opus_int32 *value = va_arg(ap, opus_int32*);
|
|
if (!value)
|
|
{
|
|
goto bad_arg;
|
|
}
|
|
if (st->prev_mode == MODE_CELT_ONLY)
|
|
celt_decoder_ctl(celt_dec, OPUS_GET_PITCH(value));
|
|
else
|
|
*value = st->DecControl.prevPitchLag;
|
|
}
|
|
break;
|
|
case OPUS_GET_GAIN_REQUEST:
|
|
{
|
|
opus_int32 *value = va_arg(ap, opus_int32*);
|
|
if (!value)
|
|
{
|
|
goto bad_arg;
|
|
}
|
|
*value = st->decode_gain;
|
|
}
|
|
break;
|
|
case OPUS_SET_GAIN_REQUEST:
|
|
{
|
|
opus_int32 value = va_arg(ap, opus_int32);
|
|
if (value<-32768 || value>32767)
|
|
{
|
|
goto bad_arg;
|
|
}
|
|
st->decode_gain = value;
|
|
}
|
|
break;
|
|
case OPUS_GET_LAST_PACKET_DURATION_REQUEST:
|
|
{
|
|
opus_uint32 *value = va_arg(ap, opus_uint32*);
|
|
if (!value)
|
|
{
|
|
goto bad_arg;
|
|
}
|
|
*value = st->last_packet_duration;
|
|
}
|
|
break;
|
|
default:
|
|
/*fprintf(stderr, "unknown opus_decoder_ctl() request: %d", request);*/
|
|
ret = OPUS_UNIMPLEMENTED;
|
|
break;
|
|
}
|
|
|
|
va_end(ap);
|
|
return ret;
|
|
bad_arg:
|
|
va_end(ap);
|
|
return OPUS_BAD_ARG;
|
|
}
|
|
|
|
void opus_decoder_destroy(OpusDecoder *st)
|
|
{
|
|
opus_free(st);
|
|
}
|
|
|
|
|
|
int opus_packet_get_bandwidth(const unsigned char *data)
|
|
{
|
|
int bandwidth;
|
|
if (data[0]&0x80)
|
|
{
|
|
bandwidth = OPUS_BANDWIDTH_MEDIUMBAND + ((data[0]>>5)&0x3);
|
|
if (bandwidth == OPUS_BANDWIDTH_MEDIUMBAND)
|
|
bandwidth = OPUS_BANDWIDTH_NARROWBAND;
|
|
} else if ((data[0]&0x60) == 0x60)
|
|
{
|
|
bandwidth = (data[0]&0x10) ? OPUS_BANDWIDTH_FULLBAND :
|
|
OPUS_BANDWIDTH_SUPERWIDEBAND;
|
|
} else {
|
|
bandwidth = OPUS_BANDWIDTH_NARROWBAND + ((data[0]>>5)&0x3);
|
|
}
|
|
return bandwidth;
|
|
}
|
|
|
|
int opus_packet_get_samples_per_frame(const unsigned char *data,
|
|
opus_int32 Fs)
|
|
{
|
|
int audiosize;
|
|
if (data[0]&0x80)
|
|
{
|
|
audiosize = ((data[0]>>3)&0x3);
|
|
audiosize = (Fs<<audiosize)/400;
|
|
} else if ((data[0]&0x60) == 0x60)
|
|
{
|
|
audiosize = (data[0]&0x08) ? Fs/50 : Fs/100;
|
|
} else {
|
|
audiosize = ((data[0]>>3)&0x3);
|
|
if (audiosize == 3)
|
|
audiosize = Fs*60/1000;
|
|
else
|
|
audiosize = (Fs<<audiosize)/100;
|
|
}
|
|
return audiosize;
|
|
}
|
|
|
|
int opus_packet_get_nb_channels(const unsigned char *data)
|
|
{
|
|
return (data[0]&0x4) ? 2 : 1;
|
|
}
|
|
|
|
int opus_packet_get_nb_frames(const unsigned char packet[], opus_int32 len)
|
|
{
|
|
int count;
|
|
if (len<1)
|
|
return OPUS_BAD_ARG;
|
|
count = packet[0]&0x3;
|
|
if (count==0)
|
|
return 1;
|
|
else if (count!=3)
|
|
return 2;
|
|
else if (len<2)
|
|
return OPUS_INVALID_PACKET;
|
|
else
|
|
return packet[1]&0x3F;
|
|
}
|
|
|
|
int opus_packet_get_nb_samples(const unsigned char packet[], opus_int32 len,
|
|
opus_int32 Fs)
|
|
{
|
|
int samples;
|
|
int count = opus_packet_get_nb_frames(packet, len);
|
|
|
|
if (count<0)
|
|
return count;
|
|
|
|
samples = count*opus_packet_get_samples_per_frame(packet, Fs);
|
|
/* Can't have more than 120 ms */
|
|
if (samples*25 > Fs*3)
|
|
return OPUS_INVALID_PACKET;
|
|
else
|
|
return samples;
|
|
}
|
|
|
|
int opus_decoder_get_nb_samples(const OpusDecoder *dec,
|
|
const unsigned char packet[], opus_int32 len)
|
|
{
|
|
return opus_packet_get_nb_samples(packet, len, dec->Fs);
|
|
}
|