145 lines
3.4 KiB
C
Executable File
145 lines
3.4 KiB
C
Executable File
/*****************************************************************************
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*
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* This program is free software ; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* $Id: amrwb.c 543 2006-01-07 22:06:24Z picard $
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*
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* The Core Pocket Media Player
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* Copyright (c) 2004-2005 Gabor Kovacs
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*
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****************************************************************************/
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#include "../common/common.h"
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#include "amrwb.h"
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#include "26204/dec_if.h"
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extern const UWord8 block_size[];
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typedef struct amrwb
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{
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codec Codec;
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buffer Buffer;
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void* Decoder;
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int16_t Synth[L_FRAME16k];
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} amrwb;
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static int UpdateInput(amrwb* p)
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{
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if (p->Decoder)
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{
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D_IF_exit(p->Decoder);
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p->Decoder = NULL;
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}
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BufferClear(&p->Buffer);
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if (p->Codec.In.Format.Type == PACKET_AUDIO)
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{
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p->Decoder = D_IF_init();
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if (!p->Decoder)
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return ERR_OUT_OF_MEMORY;
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p->Codec.In.Format.Format.Audio.SampleRate = 16000;
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p->Codec.In.Format.Format.Audio.Channels = 1;
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PacketFormatPCM(&p->Codec.Out.Format,&p->Codec.In.Format,16);
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}
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return ERR_NONE;
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}
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static int Process(amrwb* p, const packet* Packet, const flowstate* State)
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{
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int Size;
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if (Packet)
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{
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if (Packet->RefTime >= 0)
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p->Codec.Packet.RefTime = Packet->RefTime;
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// add new packet to buffer
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BufferPack(&p->Buffer,0);
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BufferWrite(&p->Buffer,Packet->Data[0],Packet->Length,256);
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}
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else
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p->Codec.Packet.RefTime = TIME_UNKNOWN;
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if (p->Buffer.WritePos - p->Buffer.ReadPos < 1)
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return ERR_NEED_MORE_DATA;
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if (p->Buffer.Data[p->Buffer.ReadPos] == '#' &&
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p->Buffer.WritePos - p->Buffer.ReadPos > 9 &&
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memcmp(p->Buffer.Data+p->Buffer.ReadPos,"#!AMR-WB\n",9)==0)
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p->Buffer.ReadPos += 9;
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Size = block_size[(p->Buffer.Data[p->Buffer.ReadPos] >> 3) & 0xF];
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if (p->Buffer.WritePos - p->Buffer.ReadPos < Size)
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return ERR_NEED_MORE_DATA;
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D_IF_decode(p->Decoder, p->Buffer.Data+p->Buffer.ReadPos, p->Synth, _good_frame);
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p->Buffer.ReadPos += Size;
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p->Codec.Packet.Length = sizeof(p->Synth);
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p->Codec.Packet.Data[0] = p->Synth;
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return ERR_NONE;
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}
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extern void D_IF_reset(void*);
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static int Flush(amrwb* p)
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{
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if (p->Decoder)
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D_IF_reset(p->Decoder);
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return ERR_NONE;
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}
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static int Create(amrwb* p)
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{
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p->Codec.Process = (packetprocess)Process;
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p->Codec.UpdateInput = (nodefunc)UpdateInput;
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p->Codec.Flush = (nodefunc)Flush;
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return ERR_NONE;
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}
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static const nodedef AMRWB =
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{
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sizeof(amrwb),
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AMRWB_ID,
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CODEC_CLASS,
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PRI_DEFAULT,
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(nodecreate)Create,
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NULL,
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};
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static const nodedef AMRWBFile =
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{
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0, //parent size
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AMRWB_FILE_ID,
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RAWAUDIO_CLASS,
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PRI_DEFAULT-5,
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};
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void AMRWB_Init()
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{
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NodeRegisterClass(&AMRWB);
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NodeRegisterClass(&AMRWBFile);
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}
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void AMRWB_Done()
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{
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NodeUnRegisterClass(AMRWB_ID);
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NodeUnRegisterClass(AMRWB_FILE_ID);
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}
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