1 #include "hw/hw.h" 2 #include "console.h" 3 #include "audio.h" 4 5 typedef struct { 6 QEMUFile *f; 7 int bytes; 8 char *path; 9 int freq; 10 int bits; 11 int nchannels; 12 CaptureVoiceOut *cap; 13 } WAVState; 14 15 /* VICE code: Store number as little endian. */ 16 static void le_store (uint8_t *buf, uint32_t val, int len) 17 { 18 int i; 19 for (i = 0; i < len; i++) { 20 buf[i] = (uint8_t) (val & 0xff); 21 val >>= 8; 22 } 23 } 24 25 static void wav_notify (void *opaque, audcnotification_e cmd) 26 { 27 (void) opaque; 28 (void) cmd; 29 } 30 31 static void wav_destroy (void *opaque) 32 { 33 WAVState *wav = opaque; 34 uint8_t rlen[4]; 35 uint8_t dlen[4]; 36 uint32_t datalen = wav->bytes; 37 uint32_t rifflen = datalen + 36; 38 39 if (wav->f) { 40 le_store (rlen, rifflen, 4); 41 le_store (dlen, datalen, 4); 42 43 qemu_fseek (wav->f, 4, SEEK_SET); 44 qemu_put_buffer (wav->f, rlen, 4); 45 46 qemu_fseek (wav->f, 32, SEEK_CUR); 47 qemu_put_buffer (wav->f, dlen, 4); 48 qemu_fclose (wav->f); 49 } 50 51 qemu_free (wav->path); 52 } 53 54 static void wav_capture (void *opaque, void *buf, int size) 55 { 56 WAVState *wav = opaque; 57 58 qemu_put_buffer (wav->f, buf, size); 59 wav->bytes += size; 60 } 61 62 static void wav_capture_destroy (void *opaque) 63 { 64 WAVState *wav = opaque; 65 66 AUD_del_capture (wav->cap, wav); 67 } 68 69 static void wav_capture_info (void *opaque) 70 { 71 WAVState *wav = opaque; 72 char *path = wav->path; 73 74 term_printf ("Capturing audio(%d,%d,%d) to %s: %d bytes\n", 75 wav->freq, wav->bits, wav->nchannels, 76 path ? path : "<not available>", wav->bytes); 77 } 78 79 static struct capture_ops wav_capture_ops = { 80 .destroy = wav_capture_destroy, 81 .info = wav_capture_info 82 }; 83 84 int wav_start_capture (CaptureState *s, const char *path, int freq, 85 int bits, int nchannels) 86 { 87 WAVState *wav; 88 uint8_t hdr[] = { 89 0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56, 90 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, 91 0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04, 92 0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00 93 }; 94 struct audsettings as; 95 struct audio_capture_ops ops; 96 int stereo, bits16, shift; 97 CaptureVoiceOut *cap; 98 99 if (bits != 8 && bits != 16) { 100 term_printf ("incorrect bit count %d, must be 8 or 16\n", bits); 101 return -1; 102 } 103 104 if (nchannels != 1 && nchannels != 2) { 105 term_printf ("incorrect channel count %d, must be 1 or 2\n", 106 nchannels); 107 return -1; 108 } 109 110 stereo = nchannels == 2; 111 bits16 = bits == 16; 112 113 as.freq = freq; 114 as.nchannels = 1 << stereo; 115 as.fmt = bits16 ? AUD_FMT_S16 : AUD_FMT_U8; 116 as.endianness = 0; 117 118 ops.notify = wav_notify; 119 ops.capture = wav_capture; 120 ops.destroy = wav_destroy; 121 122 wav = qemu_mallocz (sizeof (*wav)); 123 if (!wav) { 124 term_printf ("Could not allocate memory for wav capture (%zu bytes)", 125 sizeof (*wav)); 126 return -1; 127 } 128 129 shift = bits16 + stereo; 130 hdr[34] = bits16 ? 0x10 : 0x08; 131 132 le_store (hdr + 22, as.nchannels, 2); 133 le_store (hdr + 24, freq, 4); 134 le_store (hdr + 28, freq << shift, 4); 135 le_store (hdr + 32, 1 << shift, 2); 136 137 wav->f = qemu_fopen (path, "wb"); 138 if (!wav->f) { 139 term_printf ("Failed to open wave file `%s'\nReason: %s\n", 140 path, strerror (errno)); 141 qemu_free (wav); 142 return -1; 143 } 144 145 wav->path = qemu_strdup (path); 146 wav->bits = bits; 147 wav->nchannels = nchannels; 148 wav->freq = freq; 149 150 qemu_put_buffer (wav->f, hdr, sizeof (hdr)); 151 152 cap = AUD_add_capture (NULL, &as, &ops, wav); 153 if (!cap) { 154 term_printf ("Failed to add audio capture\n"); 155 qemu_free (wav->path); 156 qemu_fclose (wav->f); 157 qemu_free (wav); 158 return -1; 159 } 160 161 wav->cap = cap; 162 s->opaque = wav; 163 s->ops = wav_capture_ops; 164 return 0; 165 } 166