159 lines
4.1 KiB
C
Executable File
159 lines
4.1 KiB
C
Executable File
/*
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* ===================================================================
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* TS 26.104
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* REL-5 V5.4.0 2004-03
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* REL-6 V6.1.0 2004-03
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* 3GPP AMR Floating-point Speech Codec
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* ===================================================================
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <memory.h>
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#include "interf_dec.h"
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#include "sp_dec.h"
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#include "typedef.h"
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#ifndef ETSI
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#ifndef IF2
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#include <string.h>
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#define AMR_MAGIC_NUMBER "#!AMR\n"
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#endif
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#endif
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void Copyright(void){
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fprintf (stderr,
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"===================================================================\n"
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" TS 26.104 \n"
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" REL-5 V5.4.0 2004-03 \n"
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" REL-6 V6.1.0 2004-03 \n"
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" 3GPP AMR Floating-point Speech Decoder \n"
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"===================================================================\n"
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);
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}
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/*
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* main
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*
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*
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* Function:
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* Speech decoder main program
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*
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* Usage: decoder bitstream_file synthesis_file
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*
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* Format for ETSI bitstream file:
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* 1 word (2-byte) for the TX frame type
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* 244 words (2-byte) containing 244 bits.
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* Bit 0 = 0x0000 and Bit 1 = 0x0001
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* 1 word (2-byte) for the mode indication
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* 4 words for future use, currently written as zero
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*
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* Format for 3GPP bitstream file:
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* Holds mode information and bits packed to octets.
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* Size is from 1 byte to 31 bytes.
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*
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* Format for synthesis_file:
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* Speech is written to a 16 bit 8kHz file.
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*
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* ETSI bitstream file format is defined using ETSI as preprocessor
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* definition
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* Returns:
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* 0
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*/
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int main (int argc, char * argv[]){
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FILE * file_speech, *file_analysis;
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short synth[160];
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int frames = 0;
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int * destate;
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int read_size;
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#ifndef ETSI
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unsigned char analysis[32];
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enum Mode dec_mode;
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#ifdef IF2
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short block_size[16]={ 12, 13, 15, 17, 18, 20, 25, 30, 5, 0, 0, 0, 0, 0, 0, 0 };
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#else
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char magic[8];
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short block_size[16]={ 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0 };
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#endif
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#else
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short analysis[250];
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#endif
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/* Process command line options */
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if (argc == 3){
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file_speech = fopen(argv[2], "wb");
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if (file_speech == NULL){
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fprintf ( stderr, "%s%s%s\n","Use: ",argv[0], " input.file output.file " );
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return 1;
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}
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file_analysis = fopen(argv[1], "rb");
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if (file_analysis == NULL){
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fprintf ( stderr, "%s%s%s\n","Use: ",argv[0], " input.file output.file " );
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fclose(file_speech);
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return 1;
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}
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}
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else {
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fprintf ( stderr, "%s%s%s\n","Use: ",argv[0], " input.file output.file " );
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return 1;
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}
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Copyright();
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/* init decoder */
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destate = Decoder_Interface_init();
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#ifndef ETSI
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#ifndef IF2
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/* read and verify magic number */
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fread( magic, sizeof( char ), strlen( AMR_MAGIC_NUMBER ), file_analysis );
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if ( strncmp( magic, AMR_MAGIC_NUMBER, strlen( AMR_MAGIC_NUMBER ) ) ) {
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fprintf( stderr, "%s%s\n", "Invalid magic number: ", magic );
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fclose( file_speech );
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fclose( file_analysis );
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return 1;
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}
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#endif
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#endif
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#ifndef ETSI
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/* find mode, read file */
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while (fread(analysis, sizeof (unsigned char), 1, file_analysis ) > 0)
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{
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#ifdef IF2
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dec_mode = analysis[0] & 0x000F;
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#else
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dec_mode = (analysis[0] >> 3) & 0x000F;
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#endif
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read_size = block_size[dec_mode];
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fread(&analysis[1], sizeof (char), read_size, file_analysis );
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#else
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read_size = 250;
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/* read file */
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while (fread(analysis, sizeof (short), read_size, file_analysis ) > 0)
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{
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#endif
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frames ++;
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/* call decoder */
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Decoder_Interface_Decode(destate, analysis, synth, 0);
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fwrite( synth, sizeof (short), 160, file_speech );
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}
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Decoder_Interface_exit(destate);
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fclose(file_speech);
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fclose(file_analysis);
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fprintf ( stderr, "\n%s%i%s\n","Decoded ", frames, " frames.");
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return 0;
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}
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