From 80adf9b6b14e11dcf558588fe68159406ff8dcbf Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Dalleau?= Date: Mon, 8 Apr 2013 15:24:17 +0200 Subject: sbc: Update sbcinfo for msbc --- src/sbcinfo.c | 54 ++++++++++++++++++++++++++++++++++++++++-------------- 1 file changed, 40 insertions(+), 14 deletions(-) (limited to 'src') diff --git a/src/sbcinfo.c b/src/sbcinfo.c index 8cfb54a..81dec65 100644 --- a/src/sbcinfo.c +++ b/src/sbcinfo.c @@ -4,6 +4,7 @@ * * Copyright (C) 2008-2010 Nokia Corporation * Copyright (C) 2004-2010 Marcel Holtmann + * Copyright (C) 2012-2013 Intel Corporation * * * This program is free software; you can redistribute it and/or modify @@ -31,6 +32,7 @@ #include #include #include +#include #include #include #include @@ -61,12 +63,11 @@ struct sbc_frame_hdr { #error "Unknown byte order" #endif -static int calc_frame_len(struct sbc_frame_hdr *hdr) +static int calc_frame_len(struct sbc_frame_hdr *hdr, int nrof_blocks) { - int tmp, nrof_subbands, nrof_blocks; + int tmp, nrof_subbands; nrof_subbands = (hdr->subbands + 1) * 4; - nrof_blocks = (hdr->blocks + 1) * 4; switch (hdr->channel_mode) { case 0x00: @@ -89,13 +90,12 @@ static int calc_frame_len(struct sbc_frame_hdr *hdr) return (nrof_subbands + ((tmp + 7) / 8)); } -static double calc_bit_rate(struct sbc_frame_hdr *hdr) +static double calc_bit_rate(struct sbc_frame_hdr *hdr, int nrof_blocks) { - int nrof_subbands, nrof_blocks; + int nrof_subbands; double f; nrof_subbands = (hdr->subbands + 1) * 4; - nrof_blocks = (hdr->blocks + 1) * 4; switch (hdr->sampling_frequency) { case 0: @@ -114,7 +114,7 @@ static double calc_bit_rate(struct sbc_frame_hdr *hdr) return 0; } - return ((8 * (calc_frame_len(hdr) + 4) * f) / + return ((8 * (calc_frame_len(hdr, nrof_blocks) + 4) * f) / (nrof_subbands * nrof_blocks)); } @@ -176,6 +176,7 @@ static int analyze_file(char *filename) int bitpool[SIZE], frame_len[SIZE]; int subbands, blocks, freq, method; int n, p1, p2, fd, size, num; + bool msbc; ssize_t len; unsigned int count; @@ -191,17 +192,32 @@ static int analyze_file(char *filename) fd = fileno(stdin); len = __read(fd, &hdr, sizeof(hdr)); - if (len != sizeof(hdr) || hdr.syncword != 0x9c) { + if (len == sizeof(hdr) && hdr.syncword == 0x9c) { + msbc = false; + } else if (len == sizeof(hdr) && hdr.syncword == 0xad) { + msbc = true; + } else { fprintf(stderr, "Not a SBC audio file\n"); return -1; } + if (msbc) { + hdr.subbands = 1; /* 8 */ + hdr.sampling_frequency = 0x00; /* 16000 */ + hdr.allocation_method = 0; /* Loudness */ + hdr.bitpool = 26; + hdr.channel_mode = 0x00; /* Mono */ + + blocks = 15; + } else { + blocks = (hdr.blocks + 1) * 4; + } + subbands = (hdr.subbands + 1) * 4; - blocks = (hdr.blocks + 1) * 4; freq = hdr.sampling_frequency; method = hdr.allocation_method; - count = calc_frame_len(&hdr); + count = calc_frame_len(&hdr, blocks); bitpool[0] = hdr.bitpool; frame_len[0] = count + 4; @@ -213,7 +229,7 @@ static int analyze_file(char *filename) if (lseek(fd, 0, SEEK_SET) < 0) { num = 1; - rate = calc_bit_rate(&hdr); + rate = calc_bit_rate(&hdr, blocks); while (count) { size = count > sizeof(buf) ? sizeof(buf) : count; len = __read(fd, buf, size); @@ -237,14 +253,23 @@ static int analyze_file(char *filename) if (len == 0) break; - if ((size_t) len < sizeof(hdr) || hdr.syncword != 0x9c) { + if ((size_t) len < sizeof(hdr) || !(hdr.syncword == 0x9c || + hdr.syncword == 0xad)) { fprintf(stderr, "Corrupted SBC stream " "(len %zd syncword 0x%02x)\n", len, hdr.syncword); break; } - count = calc_frame_len(&hdr); + if (msbc) { + hdr.subbands = 1; /* 8 */ + hdr.sampling_frequency = 0x00; /* 16000 */ + hdr.allocation_method = 0; /* Loudness */ + hdr.bitpool = 26; + hdr.channel_mode = 0x00; /* Mono */ + } + + count = calc_frame_len(&hdr, blocks); len = count + 4; p1 = -1; @@ -273,10 +298,11 @@ static int analyze_file(char *filename) count -= len; } - rate += calc_bit_rate(&hdr); + rate += calc_bit_rate(&hdr, blocks); num++; } + printf("mSBC\t\t\t%d\n", msbc); printf("Subbands\t\t%d\n", subbands); printf("Block length\t\t%d\n", blocks); printf("Sampling frequency\t%s\n", freq2str(freq)); -- cgit v1.2.1