shithub: sox

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Add support for 24-bit PCM raw, wav, & flac files.

--- a/src/sox.c

+++ b/src/sox.c

@@ -293,7 +293,7 @@

     return(0);

 }

-static char *getoptstr = "+r:v:t:c:C:phsuUAaigbwlfdxVSqo";

+static char *getoptstr = "+r:v:t:c:C:phsuUAaigbw3lfdxVSqo";

 static struct option long_options[] =

 {

@@ -407,6 +407,9 @@

             case 'w':

                 fo->info.size = ST_SIZE_WORD;

                 break;

+            case '3':

+                fo->info.size = ST_SIZE_24BIT;

+                break;

             case 'l':

                 fo->info.size = ST_SIZE_DWORD;

                 break;

@@ -1723,7 +1726,7 @@

 "-x              invert auto-detected endianess of data\n"

 "-s/-u/-U/-A/    sample encoding.  signed/unsigned/u-law/A-law\n"

 "  -a/-i/-g/-f   ADPCM/IMA_ADPCM/GSM/floating point\n"

-"-b/-w/-l/-d     sample size. byte(8-bits)/word(16-bits)/\n"

+"-b/-w/-3/-l/-d  sample size. byte(8-bits)/word(16-bits)/3-byte(24-bits)/\n"

 "                long(32-bits)/double long(64-bits)\n"

 "\n");

--- a/src/st.h

+++ b/src/st.h

@@ -40,6 +40,9 @@

 typedef int32_t st_ssize_t;

 typedef uint32_t st_rate_t;

+typedef int32_t int24_t;

+typedef uint32_t uint24_t;

+

 /* Minimum and maximum values a sample can hold. */

 #define ST_SAMPLE_MAX 2147483647L

 #define ST_SAMPLE_MIN (-ST_SAMPLE_MAX - 1L)

@@ -49,6 +52,8 @@

 #define ST_SIGNED_BYTE_TO_SAMPLE(d) ((st_sample_t)(d) << 24)

 #define ST_UNSIGNED_WORD_TO_SAMPLE(d) ((st_sample_t)((d) ^ 0x8000) << 16)

 #define ST_SIGNED_WORD_TO_SAMPLE(d) ((st_sample_t)(d) << 16)

+#define ST_UNSIGNED_24BIT_TO_SAMPLE(d) ((st_sample_t)((d) ^ 0x800000L) << 8)

+#define ST_SIGNED_24BIT_TO_SAMPLE(d) ((st_sample_t)(d) << 8)

 #define ST_UNSIGNED_DWORD_TO_SAMPLE(d) ((st_sample_t)((d) ^ 0x80000000L))

 #define ST_SIGNED_DWORD_TO_SAMPLE(d) ((st_sample_t)d)

 #define ST_FLOAT_DWORD_TO_SAMPLE(d) (d==1? ST_SAMPLE_MAX : (st_sample_t)(d*ST_SAMPLE_FLOAT_SCALE))

@@ -57,6 +62,8 @@

 #define ST_SAMPLE_TO_SIGNED_BYTE(d) ((int8_t)((d) >> 24))

 #define ST_SAMPLE_TO_UNSIGNED_WORD(d) ((uint16_t)((d) >> 16) ^ 0x8000)

 #define ST_SAMPLE_TO_SIGNED_WORD(d) ((int16_t)((d) >> 16))

+#define ST_SAMPLE_TO_UNSIGNED_24BIT(d) ((uint24_t)((d) >> 8) ^ 0x800000L)

+#define ST_SAMPLE_TO_SIGNED_24BIT(d) ((int24_t)((d) >> 8))

 #define ST_SAMPLE_TO_UNSIGNED_DWORD(d) ((uint32_t)(d) ^ 0x80000000L)

 #define ST_SAMPLE_TO_SIGNED_DWORD(d) ((int32_t)(d))

 /* FIXME: This is an approximation because its impossible to