diff options
Diffstat (limited to 'src/libg711/g711.c')
| -rw-r--r-- | src/libg711/g711.c | 537 |
1 files changed, 537 insertions, 0 deletions
diff --git a/src/libg711/g711.c b/src/libg711/g711.c new file mode 100644 index 0000000..cd195f9 --- /dev/null +++ b/src/libg711/g711.c @@ -0,0 +1,537 @@ +/*****************************************************************************\ +** ** +** PBX4Linux ** +** ** +**---------------------------------------------------------------------------** +** Copyright: Andreas Eversberg (GPL) ** +** ** +** audio conversions for alaw and ulaw ** +** ** +\*****************************************************************************/ + +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> + +/* ulaw -> signed 16-bit */ +static int16_t g711_ulaw_flipped_to_linear[256] = +{ + 0x8284, 0x8684, 0x8a84, 0x8e84, 0x9284, 0x9684, 0x9a84, 0x9e84, + 0xa284, 0xa684, 0xaa84, 0xae84, 0xb284, 0xb684, 0xba84, 0xbe84, + 0xc184, 0xc384, 0xc584, 0xc784, 0xc984, 0xcb84, 0xcd84, 0xcf84, + 0xd184, 0xd384, 0xd584, 0xd784, 0xd984, 0xdb84, 0xdd84, 0xdf84, + 0xe104, 0xe204, 0xe304, 0xe404, 0xe504, 0xe604, 0xe704, 0xe804, + 0xe904, 0xea04, 0xeb04, 0xec04, 0xed04, 0xee04, 0xef04, 0xf004, + 0xf0c4, 0xf144, 0xf1c4, 0xf244, 0xf2c4, 0xf344, 0xf3c4, 0xf444, + 0xf4c4, 0xf544, 0xf5c4, 0xf644, 0xf6c4, 0xf744, 0xf7c4, 0xf844, + 0xf8a4, 0xf8e4, 0xf924, 0xf964, 0xf9a4, 0xf9e4, 0xfa24, 0xfa64, + 0xfaa4, 0xfae4, 0xfb24, 0xfb64, 0xfba4, 0xfbe4, 0xfc24, 0xfc64, + 0xfc94, 0xfcb4, 0xfcd4, 0xfcf4, 0xfd14, 0xfd34, 0xfd54, 0xfd74, + 0xfd94, 0xfdb4, 0xfdd4, 0xfdf4, 0xfe14, 0xfe34, 0xfe54, 0xfe74, + 0xfe8c, 0xfe9c, 0xfeac, 0xfebc, 0xfecc, 0xfedc, 0xfeec, 0xfefc, + 0xff0c, 0xff1c, 0xff2c, 0xff3c, 0xff4c, 0xff5c, 0xff6c, 0xff7c, + 0xff88, 0xff90, 0xff98, 0xffa0, 0xffa8, 0xffb0, 0xffb8, 0xffc0, + 0xffc8, 0xffd0, 0xffd8, 0xffe0, 0xffe8, 0xfff0, 0xfff8, 0xffff, + 0x7d7c, 0x797c, 0x757c, 0x717c, 0x6d7c, 0x697c, 0x657c, 0x617c, + 0x5d7c, 0x597c, 0x557c, 0x517c, 0x4d7c, 0x497c, 0x457c, 0x417c, + 0x3e7c, 0x3c7c, 0x3a7c, 0x387c, 0x367c, 0x347c, 0x327c, 0x307c, + 0x2e7c, 0x2c7c, 0x2a7c, 0x287c, 0x267c, 0x247c, 0x227c, 0x207c, + 0x1efc, 0x1dfc, 0x1cfc, 0x1bfc, 0x1afc, 0x19fc, 0x18fc, 0x17fc, + 0x16fc, 0x15fc, 0x14fc, 0x13fc, 0x12fc, 0x11fc, 0x10fc, 0x0ffc, + 0x0f3c, 0x0ebc, 0x0e3c, 0x0dbc, 0x0d3c, 0x0cbc, 0x0c3c, 0x0bbc, + 0x0b3c, 0x0abc, 0x0a3c, 0x09bc, 0x093c, 0x08bc, 0x083c, 0x07bc, + 0x075c, 0x071c, 0x06dc, 0x069c, 0x065c, 0x061c, 0x05dc, 0x059c, + 0x055c, 0x051c, 0x04dc, 0x049c, 0x045c, 0x041c, 0x03dc, 0x039c, + 0x036c, 0x034c, 0x032c, 0x030c, 0x02ec, 0x02cc, 0x02ac, 0x028c, + 0x026c, 0x024c, 0x022c, 0x020c, 0x01ec, 0x01cc, 0x01ac, 0x018c, + 0x0174, 0x0164, 0x0154, 0x0144, 0x0134, 0x0124, 0x0114, 0x0104, + 0x00f4, 0x00e4, 0x00d4, 0x00c4, 0x00b4, 0x00a4, 0x0094, 0x0084, + 0x0078, 0x0070, 0x0068, 0x0060, 0x0058, 0x0050, 0x0048, 0x0040, + 0x0038, 0x0030, 0x0028, 0x0020, 0x0018, 0x0010, 0x0008, 0x0000 +}; + +/* alaw -> signed 16-bit */ +static int16_t g711_alaw_flipped_to_linear[256] = +{ + 0x13fc, 0xec04, 0x0144, 0xfebc, 0x517c, 0xae84, 0x051c, 0xfae4, + 0x0a3c, 0xf5c4, 0x0048, 0xffb8, 0x287c, 0xd784, 0x028c, 0xfd74, + 0x1bfc, 0xe404, 0x01cc, 0xfe34, 0x717c, 0x8e84, 0x071c, 0xf8e4, + 0x0e3c, 0xf1c4, 0x00c4, 0xff3c, 0x387c, 0xc784, 0x039c, 0xfc64, + 0x0ffc, 0xf004, 0x0104, 0xfefc, 0x417c, 0xbe84, 0x041c, 0xfbe4, + 0x083c, 0xf7c4, 0x0008, 0xfff8, 0x207c, 0xdf84, 0x020c, 0xfdf4, + 0x17fc, 0xe804, 0x018c, 0xfe74, 0x617c, 0x9e84, 0x061c, 0xf9e4, + 0x0c3c, 0xf3c4, 0x0084, 0xff7c, 0x307c, 0xcf84, 0x030c, 0xfcf4, + 0x15fc, 0xea04, 0x0164, 0xfe9c, 0x597c, 0xa684, 0x059c, 0xfa64, + 0x0b3c, 0xf4c4, 0x0068, 0xff98, 0x2c7c, 0xd384, 0x02cc, 0xfd34, + 0x1dfc, 0xe204, 0x01ec, 0xfe14, 0x797c, 0x8684, 0x07bc, 0xf844, + 0x0f3c, 0xf0c4, 0x00e4, 0xff1c, 0x3c7c, 0xc384, 0x03dc, 0xfc24, + 0x11fc, 0xee04, 0x0124, 0xfedc, 0x497c, 0xb684, 0x049c, 0xfb64, + 0x093c, 0xf6c4, 0x0028, 0xffd8, 0x247c, 0xdb84, 0x024c, 0xfdb4, + 0x19fc, 0xe604, 0x01ac, 0xfe54, 0x697c, 0x9684, 0x069c, 0xf964, + 0x0d3c, 0xf2c4, 0x00a4, 0xff5c, 0x347c, 0xcb84, 0x034c, 0xfcb4, + 0x12fc, 0xed04, 0x0134, 0xfecc, 0x4d7c, 0xb284, 0x04dc, 0xfb24, + 0x09bc, 0xf644, 0x0038, 0xffc8, 0x267c, 0xd984, 0x026c, 0xfd94, + 0x1afc, 0xe504, 0x01ac, 0xfe54, 0x6d7c, 0x9284, 0x06dc, 0xf924, + 0x0dbc, 0xf244, 0x00b4, 0xff4c, 0x367c, 0xc984, 0x036c, 0xfc94, + 0x0f3c, 0xf0c4, 0x00f4, 0xff0c, 0x3e7c, 0xc184, 0x03dc, 0xfc24, + 0x07bc, 0xf844, 0x0008, 0xfff8, 0x1efc, 0xe104, 0x01ec, 0xfe14, + 0x16fc, 0xe904, 0x0174, 0xfe8c, 0x5d7c, 0xa284, 0x05dc, 0xfa24, + 0x0bbc, 0xf444, 0x0078, 0xff88, 0x2e7c, 0xd184, 0x02ec, 0xfd14, + 0x14fc, 0xeb04, 0x0154, 0xfeac, 0x557c, 0xaa84, 0x055c, 0xfaa4, + 0x0abc, 0xf544, 0x0058, 0xffa8, 0x2a7c, 0xd584, 0x02ac, 0xfd54, + 0x1cfc, 0xe304, 0x01cc, 0xfe34, 0x757c, 0x8a84, 0x075c, 0xf8a4, + 0x0ebc, 0xf144, 0x00d4, 0xff2c, 0x3a7c, 0xc584, 0x039c, 0xfc64, + 0x10fc, 0xef04, 0x0114, 0xfeec, 0x457c, 0xba84, 0x045c, 0xfba4, + 0x08bc, 0xf744, 0x0018, 0xffe8, 0x227c, 0xdd84, 0x022c, 0xfdd4, + 0x18fc, 0xe704, 0x018c, 0xfe74, 0x657c, 0x9a84, 0x065c, 0xf9a4, + 0x0cbc, 0xf344, 0x0094, 0xff6c, 0x327c, 0xcd84, 0x032c, 0xfcd4 +}; + +/* Xlaw -> signed 16-bit */ +static int16_t g711_alaw_to_linear[256]; +static int16_t g711_ulaw_to_linear[256]; + +/* signed 16-bit -> Xlaw */ +static uint8_t g711_linear_to_alaw_flipped[65536]; +static uint8_t g711_linear_to_ulaw_flipped[65536]; +static uint8_t g711_linear_to_alaw[65536]; +static uint8_t g711_linear_to_ulaw[65536]; + +/* transcode */ +static uint8_t g711_alaw_to_ulaw[256]; +static uint8_t g711_ulaw_to_alaw[256]; +static uint8_t g711_alaw_flipped_to_ulaw[256]; +static uint8_t g711_ulaw_flipped_to_alaw[256]; +static uint8_t g711_alaw_to_ulaw_flipped[256]; +static uint8_t g711_ulaw_to_alaw_flipped[256]; + +/* table is used to generate linear_to_alaw */ +static int16_t g711_alaw_relations[] = +{ + 0x8684, 0x55, 0x8a84, 0xd5, 0x8e84, 0x15, 0x9284, 0x95, + 0x9684, 0x75, 0x9a84, 0xf5, 0x9e84, 0x35, 0xa284, 0xb5, + 0xa684, 0x45, 0xaa84, 0xc5, 0xae84, 0x05, 0xb284, 0x85, + 0xb684, 0x65, 0xba84, 0xe5, 0xbe84, 0x25, 0xc184, 0xa5, + 0xc384, 0x5d, 0xc584, 0xdd, 0xc784, 0x1d, 0xc984, 0x9d, + 0xcb84, 0x7d, 0xcd84, 0xfd, 0xcf84, 0x3d, 0xd184, 0xbd, + 0xd384, 0x4d, 0xd584, 0xcd, 0xd784, 0x0d, 0xd984, 0x8d, + 0xdb84, 0x6d, 0xdd84, 0xed, 0xdf84, 0x2d, 0xe104, 0xad, + 0xe204, 0x51, 0xe304, 0xd1, 0xe404, 0x11, 0xe504, 0x91, + 0xe604, 0x71, 0xe704, 0xf1, 0xe804, 0x31, 0xe904, 0xb1, + 0xea04, 0x41, 0xeb04, 0xc1, 0xec04, 0x01, 0xed04, 0x81, + 0xee04, 0x61, 0xef04, 0xe1, 0xf004, 0x21, 0xf0c4, 0x59, + 0xf0c4, 0xa1, 0xf144, 0xd9, 0xf1c4, 0x19, 0xf244, 0x99, + 0xf2c4, 0x79, 0xf344, 0xf9, 0xf3c4, 0x39, 0xf444, 0xb9, + 0xf4c4, 0x49, 0xf544, 0xc9, 0xf5c4, 0x09, 0xf644, 0x89, + 0xf6c4, 0x69, 0xf744, 0xe9, 0xf7c4, 0x29, 0xf844, 0x57, + 0xf844, 0xa9, 0xf8a4, 0xd7, 0xf8e4, 0x17, 0xf924, 0x97, + 0xf964, 0x77, 0xf9a4, 0xf7, 0xf9e4, 0x37, 0xfa24, 0xb7, + 0xfa64, 0x47, 0xfaa4, 0xc7, 0xfae4, 0x07, 0xfb24, 0x87, + 0xfb64, 0x67, 0xfba4, 0xe7, 0xfbe4, 0x27, 0xfc24, 0x5f, + 0xfc24, 0xa7, 0xfc64, 0x1f, 0xfc64, 0xdf, 0xfc94, 0x9f, + 0xfcb4, 0x7f, 0xfcd4, 0xff, 0xfcf4, 0x3f, 0xfd14, 0xbf, + 0xfd34, 0x4f, 0xfd54, 0xcf, 0xfd74, 0x0f, 0xfd94, 0x8f, + 0xfdb4, 0x6f, 0xfdd4, 0xef, 0xfdf4, 0x2f, 0xfe14, 0x53, + 0xfe14, 0xaf, 0xfe34, 0x13, 0xfe34, 0xd3, 0xfe54, 0x73, + 0xfe54, 0x93, 0xfe74, 0x33, 0xfe74, 0xf3, 0xfe8c, 0xb3, + 0xfe9c, 0x43, 0xfeac, 0xc3, 0xfebc, 0x03, 0xfecc, 0x83, + 0xfedc, 0x63, 0xfeec, 0xe3, 0xfefc, 0x23, 0xff0c, 0xa3, + 0xff1c, 0x5b, 0xff2c, 0xdb, 0xff3c, 0x1b, 0xff4c, 0x9b, + 0xff5c, 0x7b, 0xff6c, 0xfb, 0xff7c, 0x3b, 0xff88, 0xbb, + 0xff98, 0x4b, 0xffa8, 0xcb, 0xffb8, 0x0b, 0xffc8, 0x8b, + 0xffd8, 0x6b, 0xffe8, 0xeb, 0xfff8, 0x2b, 0xfff8, 0xab, + 0x0008, 0x2a, 0x0008, 0xaa, 0x0018, 0xea, 0x0028, 0x6a, + 0x0038, 0x8a, 0x0048, 0x0a, 0x0058, 0xca, 0x0068, 0x4a, + 0x0078, 0xba, 0x0084, 0x3a, 0x0094, 0xfa, 0x00a4, 0x7a, + 0x00b4, 0x9a, 0x00c4, 0x1a, 0x00d4, 0xda, 0x00e4, 0x5a, + 0x00f4, 0xa2, 0x0104, 0x22, 0x0114, 0xe2, 0x0124, 0x62, + 0x0134, 0x82, 0x0144, 0x02, 0x0154, 0xc2, 0x0164, 0x42, + 0x0174, 0xb2, 0x018c, 0x32, 0x018c, 0xf2, 0x01ac, 0x72, + 0x01ac, 0x92, 0x01cc, 0x12, 0x01cc, 0xd2, 0x01ec, 0x52, + 0x01ec, 0xae, 0x020c, 0x2e, 0x022c, 0xee, 0x024c, 0x6e, + 0x026c, 0x8e, 0x028c, 0x0e, 0x02ac, 0xce, 0x02cc, 0x4e, + 0x02ec, 0xbe, 0x030c, 0x3e, 0x032c, 0xfe, 0x034c, 0x7e, + 0x036c, 0x9e, 0x039c, 0x1e, 0x039c, 0xde, 0x03dc, 0x5e, + 0x03dc, 0xa6, 0x041c, 0x26, 0x045c, 0xe6, 0x049c, 0x66, + 0x04dc, 0x86, 0x051c, 0x06, 0x055c, 0xc6, 0x059c, 0x46, + 0x05dc, 0xb6, 0x061c, 0x36, 0x065c, 0xf6, 0x069c, 0x76, + 0x06dc, 0x96, 0x071c, 0x16, 0x075c, 0xd6, 0x07bc, 0x56, + 0x07bc, 0xa8, 0x083c, 0x28, 0x08bc, 0xe8, 0x093c, 0x68, + 0x09bc, 0x88, 0x0a3c, 0x08, 0x0abc, 0xc8, 0x0b3c, 0x48, + 0x0bbc, 0xb8, 0x0c3c, 0x38, 0x0cbc, 0xf8, 0x0d3c, 0x78, + 0x0dbc, 0x98, 0x0e3c, 0x18, 0x0ebc, 0xd8, 0x0f3c, 0x58, + 0x0f3c, 0xa0, 0x0ffc, 0x20, 0x10fc, 0xe0, 0x11fc, 0x60, + 0x12fc, 0x80, 0x13fc, 0x00, 0x14fc, 0xc0, 0x15fc, 0x40, + 0x16fc, 0xb0, 0x17fc, 0x30, 0x18fc, 0xf0, 0x19fc, 0x70, + 0x1afc, 0x90, 0x1bfc, 0x10, 0x1cfc, 0xd0, 0x1dfc, 0x50, + 0x1efc, 0xac, 0x207c, 0x2c, 0x227c, 0xec, 0x247c, 0x6c, + 0x267c, 0x8c, 0x287c, 0x0c, 0x2a7c, 0xcc, 0x2c7c, 0x4c, + 0x2e7c, 0xbc, 0x307c, 0x3c, 0x327c, 0xfc, 0x347c, 0x7c, + 0x367c, 0x9c, 0x387c, 0x1c, 0x3a7c, 0xdc, 0x3c7c, 0x5c, + 0x3e7c, 0xa4, 0x417c, 0x24, 0x457c, 0xe4, 0x497c, 0x64, + 0x4d7c, 0x84, 0x517c, 0x04, 0x557c, 0xc4, 0x597c, 0x44, + 0x5d7c, 0xb4, 0x617c, 0x34, 0x657c, 0xf4, 0x697c, 0x74, + 0x6d7c, 0x94, 0x717c, 0x14, 0x757c, 0xd4, 0x797c, 0x54 +}; + +uint8_t g711_flip[256]; + +static int g711_initialized = 0; + +/* generate tables + */ +void g711_init(void) +{ + int i, j; + + /* flip tables */ + for (i = 0; i < 256; i++) { + g711_flip[i] + = ((i & 1) << 7) + + ((i & 2) << 5) + + ((i & 4) << 3) + + ((i & 8) << 1) + + ((i & 16) >> 1) + + ((i & 32) >> 3) + + ((i & 64) >> 5) + + ((i & 128) >> 7); + g711_alaw_to_linear[i] = g711_alaw_flipped_to_linear[g711_flip[i]]; + g711_ulaw_to_linear[i] = g711_ulaw_flipped_to_linear[g711_flip[i]]; + } + + /* linear to alaw tables */ + i = j = 0; + while(i < 65536) { + if (i - 32768 > g711_alaw_relations[j << 1]) + j++; + if (j > 255) + j = 255; + g711_linear_to_alaw_flipped[(i - 32768) & 0xffff] = g711_alaw_relations[(j << 1) | 1]; + g711_linear_to_alaw[(i - 32768) & 0xffff] = g711_flip[g711_alaw_relations[(j << 1) | 1]]; + i++; + } + + /* linear to ulaw tables */ + i = j = 0; + while(i < 32768) { + if (i - 32768 > g711_ulaw_flipped_to_linear[j]) + j++; + g711_linear_to_ulaw_flipped[(i - 32768) & 0xffff] = j; + g711_linear_to_ulaw[(i - 32768) & 0xffff] = g711_flip[j]; + i++; + } + j = 255; + while(i < 65536) { + if (i - 32768 > g711_alaw_flipped_to_linear[j]) + j--; + g711_linear_to_ulaw_flipped[(i - 32768) & 0xffff] = j; + g711_linear_to_ulaw[(i - 32768) & 0xffff] = g711_flip[j]; + i++; + } + + /* transcode */ + for (i = 0; i < 256; i++) { + g711_alaw_to_ulaw[i] = g711_linear_to_ulaw[(uint16_t)g711_alaw_to_linear[i]]; + g711_ulaw_to_alaw[i] = g711_linear_to_alaw[(uint16_t)g711_ulaw_to_linear[i]]; + g711_alaw_flipped_to_ulaw[i] = g711_linear_to_ulaw[(uint16_t)g711_alaw_to_linear[g711_flip[i]]]; + g711_ulaw_flipped_to_alaw[i] = g711_linear_to_alaw[(uint16_t)g711_ulaw_to_linear[g711_flip[i]]]; + g711_alaw_to_ulaw_flipped[i] = g711_flip[g711_linear_to_ulaw[(uint16_t)g711_alaw_to_linear[i]]]; + g711_ulaw_to_alaw_flipped[i] = g711_flip[g711_linear_to_alaw[(uint16_t)g711_ulaw_to_linear[i]]]; + } + + g711_initialized = 1; +} + +void g711_encode_alaw_flipped(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + int16_t *src = (int16_t *)src_data; + uint8_t *dst; + int len = src_len / 2, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_linear_to_alaw_flipped[(uint16_t)src[i]]; + *dst_data = dst; + *dst_len = len; +} + +void g711_encode_ulaw_flipped(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + int16_t *src = (int16_t *)src_data; + uint8_t *dst; + int len = src_len / 2, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_linear_to_ulaw_flipped[(uint16_t)src[i]]; + *dst_data = dst; + *dst_len = len; +} + +void g711_decode_alaw_flipped(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + uint8_t *src = src_data; + int16_t *dst; + int len = src_len, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len * 2); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_alaw_flipped_to_linear[src[i]]; + *dst_data = (uint8_t *)dst; + *dst_len = len * 2; +} + +void g711_decode_ulaw_flipped(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + uint8_t *src = src_data; + int16_t *dst; + int len = src_len, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len * 2); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_ulaw_flipped_to_linear[src[i]]; + *dst_data = (uint8_t *)dst; + *dst_len = len * 2; +} + +void g711_encode_alaw(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + int16_t *src = (int16_t *)src_data; + uint8_t *dst; + int len = src_len / 2, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_linear_to_alaw[(uint16_t)src[i]]; + *dst_data = dst; + *dst_len = len; +} + +void g711_encode_ulaw(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + int16_t *src = (int16_t *)src_data; + uint8_t *dst; + int len = src_len / 2, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_linear_to_ulaw[(uint16_t)src[i]]; + *dst_data = dst; + *dst_len = len; +} + +void g711_decode_alaw(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + uint8_t *src = src_data; + int16_t *dst; + int len = src_len, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len * 2); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_alaw_to_linear[src[i]]; + *dst_data = (uint8_t *)dst; + *dst_len = len * 2; +} + +void g711_decode_ulaw(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + uint8_t *src = src_data; + int16_t *dst; + int len = src_len, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len * 2); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_ulaw_to_linear[src[i]]; + *dst_data = (uint8_t *)dst; + *dst_len = len * 2; +} + +void g711_transcode_alaw_to_ulaw(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + uint8_t *src = src_data, *dst; + int len = src_len, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_alaw_to_ulaw[src[i]]; + *dst_data = dst; + *dst_len = len; +} + +void g711_transcode_alaw_flipped_to_ulaw(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + uint8_t *src = src_data, *dst; + int len = src_len, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_alaw_flipped_to_ulaw[src[i]]; + *dst_data = dst; + *dst_len = len; +} + +void g711_transcode_alaw_to_ulaw_flipped(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + uint8_t *src = src_data, *dst; + int len = src_len, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_alaw_to_ulaw_flipped[src[i]]; + *dst_data = dst; + *dst_len = len; +} + +void g711_transcode_ulaw_to_alaw(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + uint8_t *src = src_data, *dst; + int len = src_len, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_ulaw_to_alaw[src[i]]; + *dst_data = dst; + *dst_len = len; +} + +void g711_transcode_ulaw_flipped_to_alaw(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + uint8_t *src = src_data, *dst; + int len = src_len, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_ulaw_flipped_to_alaw[src[i]]; + *dst_data = dst; + *dst_len = len; +} + +void g711_transcode_ulaw_to_alaw_flipped(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + uint8_t *src = src_data, *dst; + int len = src_len, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_ulaw_to_alaw_flipped[src[i]]; + *dst_data = dst; + *dst_len = len; +} + +void g711_transcode_flipped(uint8_t *src_data, int src_len, uint8_t **dst_data, int *dst_len) +{ + uint8_t *src = src_data, *dst; + int len = src_len, i; + + if (!g711_initialized) { + fprintf(stderr, "G711 codec not initialized! Please fix!\n"); + abort(); + } + + dst = malloc(len); + if (!dst) + return; + for (i = 0; i < len; i++) + dst[i] = g711_flip[src[i]]; + *dst_data = dst; + *dst_len = len; +} + |