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-rw-r--r--src/newgrf_sound.cpp98
1 files changed, 98 insertions, 0 deletions
diff --git a/src/newgrf_sound.cpp b/src/newgrf_sound.cpp
index 47ddf2406..401c77386 100644
--- a/src/newgrf_sound.cpp
+++ b/src/newgrf_sound.cpp
@@ -16,6 +16,8 @@
#include "newgrf_sound.h"
#include "vehicle_base.h"
#include "sound_func.h"
+#include "fileio_func.h"
+#include "debug.h"
static SmallVector<SoundEntry, 8> _sounds;
@@ -52,6 +54,102 @@ uint GetNumSounds()
/**
+ * Extract meta data from a NewGRF sound.
+ * @param sound Sound to load.
+ * @return True if a valid sound was loaded.
+ */
+bool LoadNewGRFSound(SoundEntry *sound)
+{
+ if (sound->file_offset == SIZE_MAX || sound->file_slot == 0) return false;
+
+ FioSeekToFile(sound->file_slot, sound->file_offset);
+
+ /* Format: <num> <FF> <FF> <name_len> <name> '\0' <data> */
+
+ uint16 num = FioReadWord();
+ if (FioReadByte() != 0xFF) return false;
+ if (FioReadByte() != 0xFF) return false;
+
+ uint8 name_len = FioReadByte();
+ char *name = AllocaM(char, name_len + 1);
+ FioReadBlock(name, name_len + 1);
+
+ /* Test string termination */
+ if (name[name_len] != 0) {
+ DEBUG(grf, 2, "LoadNewGRFSound [%s]: Name not properly terminated", FioGetFilename(sound->file_slot));
+ return false;
+ }
+
+ DEBUG(grf, 2, "LoadNewGRFSound [%s]: Sound name '%s'...", FioGetFilename(sound->file_slot), name);
+
+ if (FioReadDword() != BSWAP32('RIFF')) {
+ DEBUG(grf, 1, "LoadNewGRFSound [%s]: Missing RIFF header", FioGetFilename(sound->file_slot));
+ return false;
+ }
+
+ uint32 total_size = FioReadDword();
+ if (total_size + name_len + 11 > num) { // The first FF in the sprite is not counted for <num>.
+ DEBUG(grf, 1, "LoadNewGRFSound [%s]: RIFF was truncated", FioGetFilename(sound->file_slot));
+ return false;
+ }
+
+ if (FioReadDword() != BSWAP32('WAVE')) {
+ DEBUG(grf, 1, "LoadNewGRFSound [%s]: Invalid RIFF type", FioGetFilename(sound->file_slot));
+ return false;
+ }
+
+ while (total_size >= 8) {
+ uint32 tag = FioReadDword();
+ uint32 size = FioReadDword();
+ total_size -= 8;
+ if (total_size < size) {
+ DEBUG(grf, 1, "LoadNewGRFSound [%s]: Invalid RIFF", FioGetFilename(sound->file_slot));
+ return false;
+ }
+ total_size -= size;
+
+ switch (tag) {
+ case ' tmf': // 'fmt '
+ /* Audio format, must be 1 (PCM) */
+ if (size < 16 || FioReadWord() != 1) {
+ DEBUG(grf, 1, "LoadGRFSound [%s]: Invalid audio format", FioGetFilename(sound->file_slot));
+ return false;
+ }
+ sound->channels = FioReadWord();
+ sound->rate = FioReadDword();
+ FioReadDword();
+ FioReadWord();
+ sound->bits_per_sample = FioReadWord();
+
+ /* The rest will be skipped */
+ size -= 16;
+ break;
+
+ case 'atad': // 'data'
+ sound->file_size = size;
+ sound->file_offset = FioGetPos();
+
+ DEBUG(grf, 2, "LoadNewGRFSound [%s]: channels %u, sample rate %u, bits per sample %u, length %u", FioGetFilename(sound->file_slot), sound->channels, sound->rate, sound->bits_per_sample, size);
+ return true; // the fmt chunk has to appear before data, so we are finished
+
+ default:
+ /* Skip unknown chunks */
+ break;
+ }
+
+ /* Skip rest of chunk */
+ if (size > 0) FioSkipBytes(size);
+ }
+
+ DEBUG(grf, 1, "LoadNewGRFSound [%s]: RIFF does not contain any sound data", FioGetFilename(sound->file_slot));
+
+ /* Clear everything that was read */
+ MemSetT(sound, 0);
+ return false;
+}
+
+
+/**
* Checks whether a NewGRF wants to play a different vehicle sound effect.
* @param v Vehicle to play sound effect for.
* @param event Trigger for the sound effect.