1 | //roarfilt.c: |
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2 | |
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3 | #include <roaraudio.h> |
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4 | |
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5 | #define BUFSIZE 1024 |
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6 | |
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7 | void usage (void) { |
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8 | printf("roarcat [OPTIONS]...\n"); |
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9 | |
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10 | printf("\nOptions:\n\n"); |
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11 | |
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12 | printf(" --server SERVER - Set server hostname\n" |
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13 | " --rate RATE - Set sample rate\n" |
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14 | " --bits BITS - Set bits per sample\n" |
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15 | " --chans CHANNELS - Set number of channels\n" |
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16 | " --help - Show this help\n" |
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17 | "\n" |
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18 | " --half - half the volume\n" |
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19 | " --double - double the volume\n" |
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20 | ); |
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21 | |
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22 | } |
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23 | |
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24 | void vol2 (void * data, int mul, int div, int len) { |
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25 | int16_t * samples = (int16_t *) data; |
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26 | int i; |
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27 | |
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28 | len /= 2; |
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29 | |
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30 | for (i = 0; i < len; i++) |
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31 | samples[i] = ((int) samples[i] * mul) / div; |
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32 | } |
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33 | |
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34 | void vol1 (void * data, int mul, int div, int len) { |
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35 | int8_t * samples = (int8_t *) data; |
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36 | int i; |
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37 | |
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38 | len /= 2; |
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39 | |
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40 | for (i = 0; i < len; i++) |
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41 | samples[i] = ((int) samples[i] * mul) / div; |
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42 | } |
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43 | |
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44 | int main (int argc, char * argv[]) { |
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45 | int rate = 44100; |
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46 | int bits = 16; |
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47 | int channels = 2; |
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48 | int codec = ROAR_CODEC_DEFAULT; |
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49 | char * server = NULL; |
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50 | char * k; |
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51 | int fh; |
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52 | int i; |
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53 | int mul = 1, div = 1; |
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54 | char buf[BUFSIZE]; |
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55 | |
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56 | for (i = 1; i < argc; i++) { |
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57 | k = argv[i]; |
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58 | |
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59 | if ( strcmp(k, "--server") == 0 ) { |
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60 | server = argv[++i]; |
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61 | } else if ( strcmp(k, "--rate") == 0 ) { |
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62 | rate = atoi(argv[++i]); |
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63 | } else if ( strcmp(k, "--bits") == 0 ) { |
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64 | bits = atoi(argv[++i]); |
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65 | } else if ( strcmp(k, "--channels") == 0 || strcmp(k, "--chans") == 0 ) { |
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66 | channels = atoi(argv[++i]); |
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67 | } else if ( strcmp(k, "--half") == 0 ) { |
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68 | div *= 2; |
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69 | } else if ( strcmp(k, "--double") == 0 ) { |
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70 | mul *= 2; |
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71 | } else if ( strcmp(k, "--help") == 0 ) { |
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72 | usage(); |
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73 | return 0; |
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74 | } else { |
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75 | fprintf(stderr, "Error: unknown argument: %s\n", k); |
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76 | usage(); |
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77 | return 1; |
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78 | } |
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79 | } |
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80 | |
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81 | if ( (fh = roar_simple_filter(rate, channels, bits, codec, server, "roarifilt")) == -1 ) { |
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82 | fprintf(stderr, "Error: can not start playback\n"); |
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83 | return 1; |
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84 | } |
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85 | |
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86 | if ( mul == div ) { |
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87 | fprintf(stderr, "Error: filter is useless!\n"); |
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88 | return 0; |
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89 | } |
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90 | |
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91 | if ( bits == 16 ) { |
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92 | while((i = read(fh, buf, BUFSIZE))) { |
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93 | vol2((void*)buf, mul, div, i); |
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94 | if (write(fh, buf, i) != i) |
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95 | break; |
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96 | } |
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97 | } else if ( bits == 8 ) { |
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98 | while((i = read(fh, buf, BUFSIZE))) { |
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99 | vol1((void*)buf, mul, div, i); |
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100 | if (write(fh, buf, i) != i) |
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101 | break; |
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102 | } |
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103 | } else { |
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104 | fprintf(stderr, "Error: %i bits per sample is not supported!\n", bits); |
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105 | return 1; |
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106 | } |
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107 | |
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108 | roar_simple_close(fh); |
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109 | |
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110 | return 0; |
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111 | } |
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112 | |
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113 | //ll |
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