Mirrors/rpitx
2
0
Fork 0
mirror of https://github.com/F5OEO/rpitx.git synced 2026-03-23 16:56:54 +01:00
Code Issues Packages Projects Releases Wiki Activity

Improve some documentation, bump version #

Browse Source
This commit is contained in:
Brandon Skari
2017-06-16 14:22:56 -06:00
parent cc0d5e2baf
commit 53f573b4fd
3 changed files with 44 additions and 42 deletions
Download Patch File Download Diff File Expand all files Collapse all files

73
src/python/_rpitxmodule.c
View File

@@ -107,75 +107,75 @@ _rpitx_broadcast_fm(PyObject* self, PyObject* args) {
RETURN_ERROR("Invalid arguments");
}
union {
char char4[4];
uint32_t uint32;
uint16_t uint16;
} buffer;
size_t byteCount = read(streamFileNo, buffer.char4, 4);
if (byteCount != 4 || strncmp(buffer.char4, "RIFF", 4) != 0) {
char char4[4];
uint32_t uint32;
uint16_t uint16;
char letter;
size_t byteCount = read(streamFileNo, char4, sizeof(char4));
if (byteCount != sizeof(char4) || strncmp(char4, "RIFF", 4) != 0) {
RETURN_ERROR("Not a WAV file");
}
// Skip chunk size
byteCount = read(streamFileNo, buffer.char4, 4);
if (byteCount != 4) {
byteCount = read(streamFileNo, char4, sizeof(char4));
if (byteCount != sizeof(char4)) {
RETURN_ERROR("Not a WAV file");
}
byteCount = read(streamFileNo, buffer.char4, 4);
if (byteCount != 4 || strncmp(buffer.char4, "WAVE", 4) != 0) {
byteCount = read(streamFileNo, char4, sizeof(char4));
if (byteCount != sizeof(char4) || strncmp(char4, "WAVE", 4) != 0) {
RETURN_ERROR("Not a WAV file");
}
byteCount = read(streamFileNo, buffer.char4, 4);
if (byteCount != 4 || strncmp(buffer.char4, "fmt ", 4) != 0) {
byteCount = read(streamFileNo, char4, sizeof(char4));
if (byteCount != sizeof(char4) || strncmp(char4, "fmt ", 4) != 0) {
RETURN_ERROR("Not a WAV file");
}
byteCount = read(streamFileNo, &buffer.uint32, 4);
buffer.uint32 = le32toh(buffer.uint32);
byteCount = read(streamFileNo, &uint32, sizeof(uint32));
uint32 = le32toh(uint32);
// TODO: This value is coming out as 18 and I don't know why, so I'm
// skipping this check for now
/*
if (byteCount != 4 || buffer.uint32 != 16) {
if (byteCount != sizeof(uint32) || uint32 != 16) {
RETURN_ERROR("Not a PCM WAV file");
}
*/
byteCount = read(streamFileNo, &buffer.uint16, 2);
buffer.uint16 = le16toh(buffer.uint16);
if (byteCount != 2 || buffer.uint16 != 1) {
byteCount = read(streamFileNo, &uint16, sizeof(uint16));
uint16 = le16toh(uint16);
if (byteCount != sizeof(uint16) || uint16 != 1) {
RETURN_ERROR("Not an uncompressed WAV file");
}
byteCount = read(streamFileNo, &buffer.uint16, 2);
buffer.uint16 = le16toh(buffer.uint16);
if (byteCount != 2 || buffer.uint16 != 1) {
byteCount = read(streamFileNo, &uint16, sizeof(uint16));
uint16 = le16toh(uint16);
if (byteCount != sizeof(uint16) || uint16 != 1) {
RETURN_ERROR("Not a mono WAV file");
}
byteCount = read(streamFileNo, &buffer.uint32, 4);
sampleRate = le32toh(buffer.uint32);
if (byteCount != 4 || sampleRate != 48000) {
byteCount = read(streamFileNo, &uint32, sizeof(uint32));
sampleRate = le32toh(uint32);
if (byteCount != sizeof(uint32) || sampleRate != 48000) {
RETURN_ERROR("Not a WAV file");
}
// Skip byte rate
byteCount = read(streamFileNo, &buffer.uint32, 4);
if (byteCount != 4) {
byteCount = read(streamFileNo, &uint32, sizeof(uint32));
if (byteCount != sizeof(uint32)) {
RETURN_ERROR("Not a WAV file");
}
// Skip block align
byteCount = read(streamFileNo, &buffer.uint16, 2);
if (byteCount != 2) {
byteCount = read(streamFileNo, &uint16, sizeof(uint16));
if (byteCount != sizeof(uint16)) {
RETURN_ERROR("Not a WAV file");
}
byteCount = read(streamFileNo, &buffer.uint16, 2);
buffer.uint16 = le16toh(buffer.uint16);
if (byteCount != 2 || buffer.uint16 != 16) {
byteCount = read(streamFileNo, &uint16, sizeof(uint16));
uint16 = le16toh(uint16);
if (byteCount != sizeof(uint16) || uint16 != 16) {
RETURN_ERROR("Not a 16 bit WAV file");
}
@@ -183,10 +183,9 @@ _rpitx_broadcast_fm(PyObject* self, PyObject* args) {
// parameters, starting with "LIST" and including the encoder I think. However,
// the marker "data" is still there where the data starts, so let's just skip
// to that.
byteCount = read(streamFileNo, buffer.char4, 1);
byteCount = read(streamFileNo, &letter, sizeof(letter));
int dataLettersCount = 0;
while (byteCount == 1) {
const char letter = buffer.char4[0];
switch (letter) {
case 'd':
dataLettersCount = 1;
@@ -211,7 +210,7 @@ _rpitx_broadcast_fm(PyObject* self, PyObject* args) {
default:
dataLettersCount = 0;
}
byteCount = read(streamFileNo, buffer.char4, 1);
byteCount = read(streamFileNo, &letter, sizeof(letter));
}
if (dataLettersCount != 4) {
RETURN_ERROR("Not a WAV file");
@@ -219,8 +218,8 @@ _rpitx_broadcast_fm(PyObject* self, PyObject* args) {
foundDataMarker:
// Skip subchunk2 size
byteCount = read(streamFileNo, &buffer.uint32, 4);
if (byteCount != 4) {
byteCount = read(streamFileNo, &uint32, sizeof(uint32));
if (byteCount != sizeof(uint32)) {
RETURN_ERROR("Not a WAV file");
}