diff options
Diffstat (limited to 'tools/rbspeex/rbspeexenc.c')
-rw-r--r-- | tools/rbspeex/rbspeexenc.c | 221 |
1 files changed, 3 insertions, 218 deletions
diff --git a/tools/rbspeex/rbspeexenc.c b/tools/rbspeex/rbspeexenc.c index e919bc8990..c7ea6e429a 100644 --- a/tools/rbspeex/rbspeexenc.c +++ b/tools/rbspeex/rbspeexenc.c @@ -16,13 +16,13 @@ * ***************************************************************************/ -#include <speex/speex.h> -#include <speex/speex_resampler.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdbool.h> +#include "rbspeex.h" + #define USAGE_TEXT \ "Usage: rbspeexenc [options] infile outfile\n"\ "Options:\n"\ @@ -35,222 +35,6 @@ "to either 16 kHz by default, or 8 kHz if narrowband mode is enabled.\n"\ "WARNING: This tool will create files that are only usable by Rockbox!\n" -/* Read an unaligned 32-bit little endian long from buffer. */ -unsigned int get_long_le(unsigned char *p) -{ - return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24); -} - -bool get_wave_metadata(FILE *fd, int *numchan, int *bps, int *sr, int *numsamples) -{ - unsigned char buf[1024]; - unsigned long totalsamples = 0; - unsigned long channels = 0; - unsigned long bitspersample = 0; - unsigned long numbytes = 0; - size_t read_bytes; - int i; - - if ((read_bytes = fread(buf, 1, 12, fd)) < 12) - return false; - - if ((memcmp(buf, "RIFF",4) != 0) || (memcmp(&buf[8], "WAVE", 4) != 0)) - return false; - - /* iterate over WAVE chunks until 'data' chunk */ - while (1) { - /* get chunk header */ - if ((read_bytes = fread(buf, 1, 8, fd)) < 8) - return false; - - /* chunkSize */ - i = get_long_le(&buf[4]); - - if (memcmp(buf, "fmt ", 4) == 0) { - /* get rest of chunk */ - if ((read_bytes = fread(buf, 1, 16, fd)) < 16) - return false; - - i -= 16; - - channels = *numchan = buf[2] | (buf[3] << 8); - *sr = get_long_le(&buf[4]); - /* wBitsPerSample */ - bitspersample = *bps = buf[14] | (buf[15] << 8); - } else if (memcmp(buf, "data", 4) == 0) { - numbytes = i; - break; - } else if (memcmp(buf, "fact", 4) == 0) { - /* dwSampleLength */ - if (i >= 4) { - /* get rest of chunk */ - if ((read_bytes = fread(buf, 1, 4, fd)) < 4) - return false; - - i -= 4; - totalsamples = get_long_le(buf); - } - } - - /* seek to next chunk (even chunk sizes must be padded) */ - if (i & 0x01) - i++; - - if (fseek(fd, i, SEEK_CUR) < 0) - return false; - } - - if ((numbytes == 0) || (channels == 0)) - return false; - - if (totalsamples == 0) { - /* for PCM only */ - totalsamples = numbytes/((((bitspersample - 1) / 8) + 1)*channels); - } - *numsamples = totalsamples; - return true; -} - -/* We'll eat an entire WAV file here, and encode it with Speex, packing the - * bits as tightly as we can. Output is completely raw, with absolutely - * nothing to identify the contents. Files are left open, so remember to close - * them. - */ -bool encode_file(FILE *fin, FILE *fout, float quality, int complexity, - bool narrowband, float volume, char *errstr, size_t errlen) -{ - spx_int16_t *in = NULL, *inpos; - spx_int16_t enc_buf[640]; /* Max frame size */ - char cbits[200]; - void *st = NULL; - SpeexResamplerState *resampler = NULL; - SpeexBits bits; - int i, tmp, target_sr, numchan, bps, sr, numsamples, frame_size, lookahead; - int nbytes; - bool ret = true; - - if (!get_wave_metadata(fin, &numchan, &bps, &sr, &numsamples)) { - snprintf(errstr, errlen, "invalid WAV file"); - return false; - } - if (numchan != 1) { - snprintf(errstr, errlen, "input file must be mono"); - return false; - } - if (bps != 16) { - snprintf(errstr, errlen, "samples must be 16 bit"); - return false; - } - - /* Allocate an encoder of specified type, defaults to wideband */ - st = speex_encoder_init(narrowband ? &speex_nb_mode : &speex_wb_mode); - if (narrowband) - target_sr = 8000; - else - target_sr = 16000; - speex_bits_init(&bits); - - /* VBR */ - tmp = 1; - speex_encoder_ctl(st, SPEEX_SET_VBR, &tmp); - /* Quality, 0-10 */ - speex_encoder_ctl(st, SPEEX_SET_VBR_QUALITY, &quality); - /* Complexity, 0-10 */ - speex_encoder_ctl(st, SPEEX_SET_COMPLEXITY, &complexity); - speex_encoder_ctl(st, SPEEX_GET_FRAME_SIZE, &frame_size); - speex_encoder_ctl(st, SPEEX_GET_LOOKAHEAD, &lookahead); - - /* Read input samples into a buffer */ - in = calloc(numsamples + lookahead, sizeof(spx_int16_t)); - if (in == NULL) { - snprintf(errstr, errlen, "could not allocate clip memory"); - ret = false; - goto finish; - } - if (fread(in, 2, numsamples, fin) != numsamples) { - snprintf(errstr, errlen, "could not read input file data"); - ret = false; - goto finish; - } - - if (volume != 1.0f) { - for (i = 0; i < numsamples; ++i) - in[i] *= volume; - } - - if (sr != target_sr) { - resampler = speex_resampler_init(1, sr, target_sr, 10, NULL); - speex_resampler_skip_zeros(resampler); - } - - /* There will be 'lookahead' samples of zero at the end of the array, to - * make sure the Speex encoder is allowed to spit out all its data at clip - * end */ - numsamples += lookahead; - - inpos = in; - while (numsamples > 0) { - int samples = frame_size; - - /* Check if we need to resample */ - if (sr != target_sr) { - spx_uint32_t in_len = numsamples, out_len = frame_size; - double resample_factor = (double)sr/(double)target_sr; - /* Calculate how many input samples are needed for one full frame - * out, and add some, just in case. */ - spx_uint32_t samples_in = frame_size*resample_factor + 50; - - /* Limit this or resampler will try to allocate it all on stack */ - if (in_len > samples_in) - in_len = samples_in; - speex_resampler_process_int(resampler, 0, inpos, &in_len, - enc_buf, &out_len); - inpos += in_len; - samples = out_len; - numsamples -= in_len; - } else { - if (samples > numsamples) - samples = numsamples; - memcpy(enc_buf, inpos, samples*2); - inpos += frame_size; - numsamples -= frame_size; - } - /* Pad out with zeros if we didn't fill all input */ - memset(enc_buf + samples, 0, (frame_size - samples)*2); - - if (speex_encode_int(st, enc_buf, &bits) < 0) { - snprintf(errstr, errlen, "encoder error"); - ret = false; - goto finish; - } - - /* Copy the bits to an array of char that can be written */ - nbytes = speex_bits_write_whole_bytes(&bits, cbits, 200); - - /* Write the compressed data */ - if (fwrite(cbits, 1, nbytes, fout) != nbytes) { - snprintf(errstr, errlen, "could not write output data"); - ret = false; - goto finish; - } - } - /* Squeeze out the last bits */ - nbytes = speex_bits_write(&bits, cbits, 200); - if (fwrite(cbits, 1, nbytes, fout) != nbytes) { - snprintf(errstr, errlen, "could not write output data"); - ret = false; - } - -finish: - if (st != NULL) - speex_encoder_destroy(st); - speex_bits_destroy(&bits); - if (resampler != NULL) - speex_resampler_destroy(resampler); - if (in != NULL) - free(in); - return ret; -} int main(int argc, char **argv) { @@ -308,3 +92,4 @@ int main(int argc, char **argv) } return 0; } + |