Is there any LAME C++ wrapper\simplifier (working on Linux Mac and Win from pure code)?
Lame really isn't difficult to use, although there are a lot of optional configuration functions if you need them. It takes slightly more than 4-5 lines to encode a file, but not much more. Here is a working example I knocked together (just the basic functionality, no error checking):
int read, write;
FILE *pcm = fopen("file.pcm", "rb");
FILE *mp3 = fopen("file.mp3", "wb");
const int PCM_SIZE = 8192;
const int MP3_SIZE = 8192;
short int pcm_buffer[PCM_SIZE*2];
unsigned char mp3_buffer[MP3_SIZE];
lame_t lame = lame_init();
read = fread(pcm_buffer, 2*sizeof(short int), PCM_SIZE, pcm);
if (read == 0)
write = lame_encode_flush(lame, mp3_buffer, MP3_SIZE);
write = lame_encode_buffer_interleaved(lame, pcm_buffer, read, mp3_buffer, MP3_SIZE);
fwrite(mp3_buffer, write, 1, mp3);
} while (read != 0);
any ruby wrapper for lame encoders out there that has good documentation?
How about just running lame something like this?
system("lame -V2 -f " + wavefile + " " + wavefile.gsub("wav", "mp3"))
Where to get pure C++ Lame MP3 encoder - PCM to MP3 example?
See the example I gave in your other question for the basic usage of Lame. It should contain everything you need.
How to decode mp3 into wav using lame in C/C++?
Take a look into the lame frontend source code. Start at the
lame_decoder() function in the
.../frontend/lame_main.c file, it decodes an MP3 file and writes the wave header.
Audio speed changes on converting WAV to MP3
You are setting it up to encode a mono stream (
lame_set_mode(lame, MONO);) but providing the data as if it were interleaved stereo.
If it's a mono stream, then remove the
fread, to read enough samples for a single channel; and call
lame_encode_buffer rather than
lame_encode_buffer_interleaved, with the right-hand channel pointer set to either
pcm_buffer, to encode just one channel.
If it's a stereo stream, then don't set the mode to mono. You probably shouldn't do this anyway; I think it detects the mode based on the number of channels.
Also, as I mentioned when I wrote that code, you should check for and handle errors if you're using it in a real application. It's a very basic example.