/*
* This file is part of DisOrder
- * Copyright (C) 2007 Richard Kettlewell
+ * Copyright (C) 2007-2010 Richard Kettlewell
*
- * This program is free software; you can redistribute it and/or modify
+ * This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file server/decode.c
* @brief General-purpose decoder for use by speaker process
*/
+#include "decode.h"
-#include <config.h>
-#include "types.h"
-
-#include <getopt.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <locale.h>
-#include <assert.h>
-#include <fnmatch.h>
#include <mad.h>
#include <vorbis/vorbisfile.h>
-/* libFLAC has had an API change and stupidly taken away the old API */
-#if HAVE_FLAC_FILE_DECODER_H
-# include <FLAC/file_decoder.h>
-#else
-# include <FLAC/stream_decoder.h>
-#define FLAC__FileDecoder FLAC__StreamDecoder
-#define FLAC__FileDecoderState FLAC__StreamDecoderState
-#endif
+#include <FLAC/stream_decoder.h>
-#include "log.h"
-#include "syscalls.h"
-#include "defs.h"
#include "wav.h"
-#include "speaker-protocol.h"
+
/** @brief Encoding lookup table type */
struct decoder {
void (*decode)(void);
};
-/** @brief Input file */
-static int inputfd;
-
-/** @brief Output file */
-static FILE *outputfp;
-
-/** @brief Filename */
-static const char *path;
-
-/** @brief Input buffer */
-static char input_buffer[1048576];
-
-/** @brief Open the input file */
-static void open_input(void) {
- if((inputfd = open(path, O_RDONLY)) < 0)
- fatal(errno, "opening %s", path);
-}
-
-/** @brief Fill the buffer
- * @return Number of bytes read
- */
-static size_t fill(void) {
- int n = read(inputfd, input_buffer, sizeof input_buffer);
-
- if(n < 0)
- fatal(errno, "reading from %s", path);
- return n;
-}
-
-/** @brief Write an 8-bit word */
-static inline void output_8(int n) {
- if(putc(n, outputfp) < 0)
- fatal(errno, "decoding %s: output error", path);
-}
-
-/** @brief Write a 16-bit word in bigendian format */
-static inline void output_16(uint16_t n) {
- if(putc(n >> 8, outputfp) < 0
- || putc(n, outputfp) < 0)
- fatal(errno, "decoding %s: output error", path);
-}
-
-/** @brief Write a 24-bit word in bigendian format */
-static inline void output_24(uint32_t n) {
- if(putc(n >> 16, outputfp) < 0
- || putc(n >> 8, outputfp) < 0
- || putc(n, outputfp) < 0)
- fatal(errno, "decoding %s: output error", path);
-}
-
-/** @brief Write a 32-bit word in bigendian format */
-static inline void output_32(uint32_t n) {
- if(putc(n >> 24, outputfp) < 0
- || putc(n >> 16, outputfp) < 0
- || putc(n >> 8, outputfp) < 0
- || putc(n, outputfp) < 0)
- fatal(errno, "decoding %s: output error", path);
-}
+FILE *outputfp;
+const char *path;
+char input_buffer[INPUT_BUFFER_SIZE];
+int input_count;
/** @brief Write a block header
* @param rate Sample rate in Hz
* @param endian @ref ENDIAN_BIG or @ref ENDIAN_LITTLE
*
* Checks that the sample format is a supported one (so other calls do not have
- * to) and calls fatal() on error.
+ * to) and calls disorder_fatal() on error.
*/
-static void output_header(int rate,
- int channels,
- int bits,
- int nbytes,
- int endian) {
+void output_header(int rate,
+ int channels,
+ int bits,
+ int nbytes,
+ int endian) {
struct stream_header header;
if(bits <= 0 || bits % 8 || bits > 64)
- fatal(0, "decoding %s: unsupported sample size %d bits", path, bits);
+ disorder_fatal(0, "decoding %s: unsupported sample size %d bits",
+ path, bits);
if(channels <= 0 || channels > 2)
- fatal(0, "decoding %s: unsupported channel count %d", path, channels);
+ disorder_fatal(0, "decoding %s: unsupported channel count %d",
+ path, channels);
if(rate <= 0)
- fatal(0, "decoding %s: nonsensical sample rate %dHz", path, rate);
+ disorder_fatal(0, "decoding %s: nonsensical sample rate %dHz", path, rate);
header.rate = rate;
header.bits = bits;
header.channels = channels;
header.endian = endian;
header.nbytes = nbytes;
if(fwrite(&header, sizeof header, 1, outputfp) < 1)
- fatal(errno, "decoding %s: writing format header", path);
-}
-
-/** @brief Dithering state
- * Filched from mpg321, which credits it to Robert Leslie */
-struct audio_dither {
- mad_fixed_t error[3];
- mad_fixed_t random;
-};
-
-/** @brief 32-bit PRNG
- * Filched from mpg321, which credits it to Robert Leslie */
-static inline unsigned long prng(unsigned long state)
-{
- return (state * 0x0019660dL + 0x3c6ef35fL) & 0xffffffffL;
-}
-
-/** @brief Generic linear sample quantize and dither routine
- * Filched from mpg321, which credits it to Robert Leslie */
-#define bits 16
-static long audio_linear_dither(mad_fixed_t sample,
- struct audio_dither *dither) {
- unsigned int scalebits;
- mad_fixed_t output, mask, rnd;
-
- enum {
- MIN = -MAD_F_ONE,
- MAX = MAD_F_ONE - 1
- };
-
- /* noise shape */
- sample += dither->error[0] - dither->error[1] + dither->error[2];
-
- dither->error[2] = dither->error[1];
- dither->error[1] = dither->error[0] / 2;
-
- /* bias */
- output = sample + (1L << (MAD_F_FRACBITS + 1 - bits - 1));
-
- scalebits = MAD_F_FRACBITS + 1 - bits;
- mask = (1L << scalebits) - 1;
-
- /* dither */
- rnd = prng(dither->random);
- output += (rnd & mask) - (dither->random & mask);
-
- dither->random = rnd;
-
- /* clip */
- if (output > MAX) {
- output = MAX;
-
- if (sample > MAX)
- sample = MAX;
- }
- else if (output < MIN) {
- output = MIN;
-
- if (sample < MIN)
- sample = MIN;
- }
-
- /* quantize */
- output &= ~mask;
-
- /* error feedback */
- dither->error[0] = sample - output;
-
- /* scale */
- return output >> scalebits;
-}
-#undef bits
-
-/** @brief MP3 output callback */
-static enum mad_flow mp3_output(void attribute((unused)) *data,
- struct mad_header const *header,
- struct mad_pcm *pcm) {
- size_t n = pcm->length;
- const mad_fixed_t *l = pcm->samples[0], *r = pcm->samples[1];
- static struct audio_dither ld[1], rd[1];
-
- output_header(header->samplerate,
- pcm->channels,
- 16,
- 2 * pcm->channels * pcm->length,
- ENDIAN_BIG);
- switch(pcm->channels) {
- case 1:
- while(n--)
- output_16(audio_linear_dither(*l++, ld));
- break;
- case 2:
- while(n--) {
- output_16(audio_linear_dither(*l++, ld));
- output_16(audio_linear_dither(*r++, rd));
- }
- break;
- }
- return MAD_FLOW_CONTINUE;
-}
-
-/** @brief MP3 input callback */
-static enum mad_flow mp3_input(void attribute((unused)) *data,
- struct mad_stream *stream) {
- const size_t n = fill();
-
- if(!n)
- return MAD_FLOW_STOP;
- mad_stream_buffer(stream, (unsigned char *)input_buffer, n);
- return MAD_FLOW_CONTINUE;
-}
-
-
-/** @brief MP3 error callback */
-static enum mad_flow mp3_error(void attribute((unused)) *data,
- struct mad_stream *stream,
- struct mad_frame attribute((unused)) *frame) {
- if(0)
- /* Just generates pointless verbosity l-( */
- error(0, "decoding %s: %s (%#04x)",
- path, mad_stream_errorstr(stream), stream->error);
- return MAD_FLOW_CONTINUE;
-}
-
-/** @brief MP3 decoder */
-static void decode_mp3(void) {
- struct mad_decoder mad[1];
-
- open_input();
- mad_decoder_init(mad, 0/*data*/, mp3_input, 0/*header*/, 0/*filter*/,
- mp3_output, mp3_error, 0/*message*/);
- if(mad_decoder_run(mad, MAD_DECODER_MODE_SYNC))
- exit(1);
- mad_decoder_finish(mad);
-}
-
-/** @brief OGG decoder */
-static void decode_ogg(void) {
- FILE *fp;
- OggVorbis_File vf[1];
- int err;
- long n;
- int bitstream;
- vorbis_info *vi;
-
- if(!(fp = fopen(path, "rb")))
- fatal(errno, "cannot open %s", path);
- /* There doesn't seem to be any standard function for mapping the error codes
- * to strings l-( */
- if((err = ov_open(fp, vf, 0/*initial*/, 0/*ibytes*/)))
- fatal(0, "ov_fopen %s: %d", path, err);
- if(!(vi = ov_info(vf, 0/*link*/)))
- fatal(0, "ov_info %s: failed", path);
- while((n = ov_read(vf, input_buffer, sizeof input_buffer, 1/*bigendianp*/,
- 2/*bytes/word*/, 1/*signed*/, &bitstream))) {
- if(n < 0)
- fatal(0, "ov_read %s: %ld", path, n);
- if(bitstream > 0)
- fatal(0, "only single-bitstream ogg files are supported");
- output_header(vi->rate, vi->channels, 16/*bits*/, n, ENDIAN_BIG);
- if(fwrite(input_buffer, 1, n, outputfp) < (size_t)n)
- fatal(errno, "decoding %s: writing sample data", path);
- }
-}
-
-/** @brief Sample data callback used by decode_wav() */
-static int wav_write(struct wavfile attribute((unused)) *f,
- const char *data,
- size_t nbytes,
- void attribute((unused)) *u) {
- if(fwrite(data, 1, nbytes, outputfp) < nbytes)
- fatal(errno, "decoding %s: writing sample data", path);
- return 0;
-}
-
-/** @brief WAV file decoder */
-static void decode_wav(void) {
- struct wavfile f[1];
- int err;
-
- if((err = wav_init(f, path)))
- fatal(err, "opening %s", path);
- output_header(f->rate, f->channels, f->bits, f->datasize, ENDIAN_LITTLE);
- if((err = wav_data(f, wav_write, 0)))
- fatal(err, "error decoding %s", path);
-}
-
-/** @brief Metadata callback for FLAC decoder
- *
- * This is a no-op here.
- */
-static void flac_metadata(const FLAC__FileDecoder attribute((unused)) *decoder,
- const FLAC__StreamMetadata attribute((unused)) *metadata,
- void attribute((unused)) *client_data) {
-}
-
-/** @brief Error callback for FLAC decoder */
-static void flac_error(const FLAC__FileDecoder attribute((unused)) *decoder,
- FLAC__StreamDecoderErrorStatus status,
- void attribute((unused)) *client_data) {
- fatal(0, "error decoding %s: %s", path,
- FLAC__StreamDecoderErrorStatusString[status]);
-}
-
-/** @brief Write callback for FLAC decoder */
-static FLAC__StreamDecoderWriteStatus flac_write
- (const FLAC__FileDecoder attribute((unused)) *decoder,
- const FLAC__Frame *frame,
- const FLAC__int32 *const buffer[],
- void attribute((unused)) *client_data) {
- size_t n, c;
-
- output_header(frame->header.sample_rate,
- frame->header.channels,
- frame->header.bits_per_sample,
- (frame->header.channels * frame->header.blocksize
- * frame->header.bits_per_sample) / 8,
- ENDIAN_BIG);
- for(n = 0; n < frame->header.blocksize; ++n) {
- for(c = 0; c < frame->header.channels; ++c) {
- switch(frame->header.bits_per_sample) {
- case 8: output_8(buffer[c][n]); break;
- case 16: output_16(buffer[c][n]); break;
- case 24: output_24(buffer[c][n]); break;
- case 32: output_32(buffer[c][n]); break;
- }
- }
- }
- return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
-}
-
-
-/** @brief FLAC file decoder */
-static void decode_flac(void) {
-#if HAVE_FLAC_FILE_DECODER_H
- FLAC__FileDecoder *fd = 0;
- FLAC__FileDecoderState fs;
-
- if(!(fd = FLAC__file_decoder_new()))
- fatal(0, "FLAC__file_decoder_new failed");
- if(!(FLAC__file_decoder_set_filename(fd, path)))
- fatal(0, "FLAC__file_set_filename failed");
- FLAC__file_decoder_set_metadata_callback(fd, flac_metadata);
- FLAC__file_decoder_set_error_callback(fd, flac_error);
- FLAC__file_decoder_set_write_callback(fd, flac_write);
- if((fs = FLAC__file_decoder_init(fd)))
- fatal(0, "FLAC__file_decoder_init: %s", FLAC__FileDecoderStateString[fs]);
- FLAC__file_decoder_process_until_end_of_file(fd);
-#else
- FLAC__StreamDecoder *sd = 0;
- FLAC__StreamDecoderInitStatus is;
-
- if((is = FLAC__stream_decoder_init_file(sd, path, flac_write, flac_metadata,
- flac_error, 0)))
- fatal(0, "FLAC__stream_decoder_init_file %s: %s",
- path, FLAC__StreamDecoderInitStatusString[is]);
-#endif
+ disorder_fatal(errno, "decoding %s: writing format header", path);
}
/** @brief Lookup table of decoders */
exit(0);
}
-/* Display version number and terminate. */
-static void version(void) {
- xprintf("%s", disorder_version_string);
- xfclose(stdout);
- exit(0);
-}
-
int main(int argc, char **argv) {
int n;
const char *e;
set_progname(argv);
- if(!setlocale(LC_CTYPE, "")) fatal(errno, "calling setlocale");
+ if(!setlocale(LC_CTYPE, "")) disorder_fatal(errno, "calling setlocale");
while((n = getopt_long(argc, argv, "hV", options, 0)) >= 0) {
switch(n) {
case 'h': help();
- case 'V': version();
- default: fatal(0, "invalid option");
+ case 'V': version("disorder-decode");
+ default: disorder_fatal(0, "invalid option");
}
}
if(optind >= argc)
- fatal(0, "missing filename");
+ disorder_fatal(0, "missing filename");
if(optind + 1 < argc)
- fatal(0, "excess arguments");
+ disorder_fatal(0, "excess arguments");
if((e = getenv("DISORDER_RAW_FD"))) {
if(!(outputfp = fdopen(atoi(e), "wb")))
- fatal(errno, "fdopen");
+ disorder_fatal(errno, "fdopen");
} else
outputfp = stdout;
path = argv[optind];
++n)
;
if(!decoders[n].pattern)
- fatal(0, "cannot determine file type for %s", path);
+ disorder_fatal(0, "cannot determine file type for %s", path);
decoders[n].decode();
xfclose(outputfp);
return 0;
~mdw / disorder / blobdiff