190 lines
3.0 KiB
C
190 lines
3.0 KiB
C
#include "bothdefs.h"
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#ifdef VOICECHAT
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#include "quakedef.h"
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#include "voicechat.h"
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#include "g72x.h"
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int VC_g72x_encoder (short *in, unsigned char *out, int samples, int (*g72x_encoder)(int,int,struct g72x_state *state), int bits)
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{
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struct g72x_state state;
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unsigned int out_buffer = 0;
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int out_bits = 0;
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unsigned char out_byte;
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int code;
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int written=0;
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g72x_init_state(&state);
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while (samples)
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{
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code = g72x_encoder(*in, AUDIO_ENCODING_LINEAR, &state);
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out_buffer |= (code << out_bits);
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out_bits += bits;
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if (out_bits >= 8)
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{
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out_byte = out_buffer & 0xff;
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out_bits -= 8;
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out_buffer >>= 8;
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*out = out_byte;
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out++;
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written++;
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}
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in++;
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samples--;
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}
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code=0;
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while (out_bits > 0)
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{
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out_buffer |= (code << out_bits);
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out_bits += bits;
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if (out_bits >= 8)
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{
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out_byte = out_buffer & 0xff;
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out_bits -= 8;
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out_buffer >>= 8;
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*out = out_byte;
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out++;
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written++;
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}
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}
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return written;
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}
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int VC_g723_24_encoder (short *in, unsigned char *out, int samples)
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{
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return VC_g72x_encoder(in, out, samples, g723_24_encoder, 3);
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}
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int VC_g721_encoder (short *in, unsigned char *out, int samples)
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{
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return VC_g72x_encoder(in, out, samples, g721_encoder, 4);
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}
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int VC_g723_40_encoder (short *in, unsigned char *out, int samples)
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{
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return VC_g72x_encoder(in, out, samples, g723_40_encoder, 5);
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}
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int VC_g72x_decoder (unsigned char *in, short *out, int samples, int (*g72x_decoder)(int,int,struct g72x_state *state), int bits)
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{
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struct g72x_state state;
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unsigned int in_buffer = 0;
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int in_bits = 0;
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unsigned char in_byte;
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int code;
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int read=0;
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g72x_init_state(&state);
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while (samples)
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{
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if (in_bits < bits)
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{
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in_byte = *in++;
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read++;
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in_buffer |= (in_byte << in_bits);
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in_bits += 8;
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}
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code = in_buffer & ((1 << bits) - 1);
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in_buffer >>= bits;
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in_bits -= bits;
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*out = g72x_decoder(code, AUDIO_ENCODING_LINEAR, &state);
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out++;
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samples--;
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}
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return read;
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}
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int VC_g723_24_decoder (unsigned char *in, short *out, int samples)
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{
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return VC_g72x_decoder(in, out, samples, g723_24_decoder, 3);
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}
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int VC_g721_decoder (unsigned char *in, short *out, int samples)
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{
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return VC_g72x_decoder(in, out, samples, g721_decoder, 4);
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}
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int VC_g723_40_decoder (unsigned char *in, short *out, int samples)
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{
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return VC_g72x_decoder(in, out, samples, g723_40_decoder, 5);
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}
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int VS_Raw_enc (short *in, unsigned char *out, int samples)
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{
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memcpy(out, in, samples*2);
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return samples*2;
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}
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int VS_Raw_dec (unsigned char *in, short *out, int samples)
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{
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memcpy(out, in, samples*2);
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return samples*2;
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}
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audiocodec_t audiocodecs[] = {
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{"Raw 11025sps 16bit", VS_Raw_enc, VS_Raw_dec},
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#ifdef _G72X_H
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{"G.723.24", VC_g723_24_encoder, VC_g723_24_decoder},
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{"G.721 32", VC_g721_encoder, VC_g721_decoder},
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{"G.723.40", VC_g723_40_encoder, VC_g723_40_decoder},
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#else
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{"Non-implemented codec (G.723.24)"},
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{"Non-implemented codec (G.721 32)"},
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{"Non-implemented codec (G.723.40)"},
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#endif
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{0}
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};
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const int audionumcodecs = sizeof(audiocodecs)/sizeof(audiocodec_t);
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#endif
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