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-rw-r--r--libtoolame-dab/toolame.c567
1 files changed, 567 insertions, 0 deletions
diff --git a/libtoolame-dab/toolame.c b/libtoolame-dab/toolame.c
new file mode 100644
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--- /dev/null
+++ b/libtoolame-dab/toolame.c
@@ -0,0 +1,567 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "common.h"
+#include "encoder.h"
+#include "options.h"
+#include "bitstream.h"
+#include "mem.h"
+#include "crc.h"
+#include "psycho_n1.h"
+#include "psycho_0.h"
+#include "psycho_1.h"
+#include "psycho_2.h"
+#include "psycho_3.h"
+#include "psycho_4.h"
+#include "encode.h"
+#include "availbits.h"
+#include "subband.h"
+#include "encode_new.h"
+#include "toolame.h"
+#include "utils.h"
+#include <assert.h>
+
+Bit_stream_struc bs;
+
+const int FPAD_LENGTH=2;
+
+void smr_dump(double smr[2][SBLIMIT], int nch);
+
+void global_init (void)
+{
+ glopts.usepsy = TRUE;
+ glopts.usepadbit = TRUE;
+ glopts.quickmode = FALSE;
+ glopts.quickcount = 10;
+ glopts.downmix = FALSE;
+ glopts.byteswap = FALSE;
+ glopts.channelswap = FALSE;
+ glopts.vbr = FALSE;
+ glopts.vbrlevel = 0;
+ glopts.athlevel = 0;
+ glopts.verbosity = 2;
+ glopts.input_select = 0;
+}
+
+/************************************************************************
+ *
+ * main
+ *
+ * PURPOSE: MPEG II Encoder with
+ * psychoacoustic models 1 (MUSICAM) and 2 (AT&T)
+ *
+ * SEMANTICS: One overlapping frame of audio of up to 2 channels are
+ * processed at a time in the following order:
+ * (associated routines are in parentheses)
+ *
+ * 1. Filter sliding window of data to get 32 subband
+ * samples per channel.
+ * (window_subband,filter_subband)
+ *
+ * 2. If joint stereo mode, combine left and right channels
+ * for subbands above #jsbound#.
+ * (combine_LR)
+ *
+ * 3. Calculate scalefactors for the frame, and
+ * also calculate scalefactor select information.
+ * (*_scale_factor_calc)
+ *
+ * 4. Calculate psychoacoustic masking levels using selected
+ * psychoacoustic model.
+ * (psycho_i, psycho_ii)
+ *
+ * 5. Perform iterative bit allocation for subbands with low
+ * mask_to_noise ratios using masking levels from step 4.
+ * (*_main_bit_allocation)
+ *
+ * 6. If error protection flag is active, add redundancy for
+ * error protection.
+ * (*_CRC_calc)
+ *
+ * 7. Pack bit allocation, scalefactors, and scalefactor select
+ *headerrmation onto bitstream.
+ * (*_encode_bit_alloc,*_encode_scale,transmission_pattern)
+ *
+ * 8. Quantize subbands and pack them into bitstream
+ * (*_subband_quantization, *_sample_encoding)
+ *
+ ************************************************************************/
+
+static frame_info frame;
+static frame_header header;
+static int frameNum;
+static int xpad_len;
+static int psycount;
+static int model;
+static unsigned int crc;
+
+typedef double SBS[2][3][SCALE_BLOCK][SBLIMIT];
+typedef double JSBS[3][SCALE_BLOCK][SBLIMIT];
+typedef unsigned int SUB[2][3][SCALE_BLOCK][SBLIMIT];
+
+static SBS *sb_sample;
+static JSBS *j_sample;
+static SUB *subband;
+
+static unsigned int scalar[2][3][SBLIMIT];
+static unsigned int j_scale[3][SBLIMIT];
+
+static double smr[2][SBLIMIT];
+static double max_sc[2][SBLIMIT];
+static short sam[2][1344];
+
+/* Used to keep the SNR values for the fast/quick psy models */
+static FLOAT smrdef[2][32];
+
+static unsigned int scfsi[2][SBLIMIT];
+static unsigned int bit_alloc[2][SBLIMIT];
+
+static char* mot_file = NULL;
+static char* icy_file = NULL;
+
+int toolame_init(void)
+{
+ frameNum = 0;
+ psycount = 0;
+
+ frame.header = &header;
+ frame.tab_num = -1; /* no table loaded */
+ frame.alloc = NULL;
+
+ sb_sample = (SBS *) mem_alloc (sizeof (SBS), "sb_sample");
+ j_sample = (JSBS *) mem_alloc (sizeof (JSBS), "j_sample");
+ subband = (SUB *) mem_alloc (sizeof (SUB), "subband");
+ memset ((char *) scalar, 0, sizeof (scalar));
+ memset ((char *) j_scale, 0, sizeof (j_scale));
+ memset ((char *) smr, 0, sizeof (smr));
+ memset ((char *) max_sc, 0, sizeof (max_sc));
+ memset ((char *) sam, 0, sizeof (sam));
+ memset ((char *) scfsi, 0, sizeof (scfsi));
+ memset ((char *) bit_alloc, 0, sizeof (bit_alloc));
+
+ global_init();
+
+ header.extension = 0;
+ header.version = MPEG_AUDIO_ID; /* Default: MPEG-1 */
+ header.copyright = 0;
+ header.original = 0;
+ header.error_protection = FALSE;
+ header.dab_extension = 1;
+ header.lay = DFLT_LAY;
+
+ model = DFLT_PSY;
+
+ return 0;
+}
+
+int toolame_finish(
+ unsigned char *output_buffer,
+ size_t output_buffer_size)
+{
+ bs.output_buffer = output_buffer;
+ bs.output_buffer_size = output_buffer_size;
+ bs.output_buffer_written = 0;
+
+ close_bit_stream_w(&bs);
+
+ return bs.output_buffer_written;
+}
+
+int toolame_enable_downmix_stereo(void)
+{
+ glopts.downmix = TRUE;
+ header.mode = MPG_MD_MONO;
+ header.mode_ext = 0;
+ return 0;
+}
+
+int toolame_enable_byteswap(void)
+{
+ glopts.byteswap = TRUE;
+ return 0;
+}
+
+int toolame_set_channel_mode(const char mode)
+{
+ switch (mode) {
+ case 's':
+ header.mode = MPG_MD_STEREO;
+ header.mode_ext = 0;
+ break;
+ case 'd':
+ header.mode = MPG_MD_DUAL_CHANNEL;
+ header.mode_ext = 0;
+ break;
+ /* in j-stereo mode, no default header.mode_ext was defined, gave error..
+ now default = 2 added by MFC 14 Dec 1999. */
+ case 'j':
+ header.mode = MPG_MD_JOINT_STEREO;
+ header.mode_ext = 2;
+ break;
+ case 'm':
+ header.mode = MPG_MD_MONO;
+ header.mode_ext = 0;
+ break;
+ default:
+ fprintf (stderr, "libtoolame-dab: Bad mode %c\n", mode);
+ return 1;
+ }
+ return 0;
+}
+
+int toolame_set_psy_model(int new_model)
+{
+ if (new_model < 0 || new_model > 3) {
+ fprintf(stderr, "libtoolame-dab: Invalid PSY model %d\n", new_model);
+ return 1;
+ }
+ model = new_model;
+ return 0;
+}
+
+int toolame_set_bitrate(int brate)
+{
+ int err = 0;
+
+ /* check for a valid bitrate */
+ if (brate == 0)
+ brate = bitrate[header.version][10];
+
+ /* Check to see we have a sane value for the bitrate for this version */
+ if ((header.bitrate_index = BitrateIndex (brate, header.version)) < 0) {
+ err = 1;
+ }
+
+ if (header.dab_extension) {
+ /* in 48 kHz (= MPEG-1) */
+ /* if the bit rate per channel is less then 56 kbit/s, we have 2 scf-crc */
+ /* else we have 4 scf-crc */
+ /* in 24 kHz (= MPEG-2), we have 4 scf-crc */
+ if (header.version == MPEG_AUDIO_ID && (brate / (header.mode == MPG_MD_MONO ? 1 : 2) < 56))
+ header.dab_extension = 2;
+ }
+
+ open_bit_stream_w(&bs, BUFFER_SIZE);
+
+ return err;
+}
+
+int toolame_set_samplerate(long sample_rate)
+{
+ int s_freq = SmpFrqIndex(sample_rate, &header.version);
+ if (s_freq < 0) {
+ return s_freq;
+ }
+
+ header.sampling_frequency = s_freq;
+ return 0;
+}
+
+int toolame_set_pad(int pad_len)
+{
+ header.dab_length = pad_len;
+ if (header.dab_length <= 0) {
+ fprintf(stderr, "Invalid XPAD length specified\n");
+ return 1;
+ }
+
+ return 0;
+}
+
+
+static int encode_first_call = 1;
+
+int toolame_encode_frame(
+ short buffer[2][1152],
+ unsigned char *xpad_data,
+ unsigned char *output_buffer,
+ size_t output_buffer_size)
+{
+ extern int minimum;
+ const int nch = frame.nch;
+ const int error_protection = header.error_protection;
+
+ if (encode_first_call) {
+ hdr_to_frps(&frame);
+ encode_first_call = 0;
+ }
+
+ bs.output_buffer = output_buffer;
+ bs.output_buffer_size = output_buffer_size;
+ bs.output_buffer_written = 0;
+
+#ifdef REFERENCECODE
+ short *win_buf[2] = {&buffer[0][0], &buffer[1][0]};
+#endif
+
+ int adb = available_bits (&header, &glopts);
+ int lg_frame = adb / 8;
+ if (header.dab_extension) {
+ /* You must have one frame in memory if you are in DAB mode */
+ /* in conformity of the norme ETS 300 401 http://www.etsi.org */
+ /* see bitstream.c */
+ if (frameNum == 1)
+ minimum = lg_frame + MINIMUM;
+ adb -= header.dab_extension * 8 + (xpad_len ? xpad_len : FPAD_LENGTH) * 8;
+ }
+
+ {
+ int gr, bl, ch;
+ /* New polyphase filter
+ Combines windowing and filtering. Ricardo Feb'03 */
+ for( gr = 0; gr < 3; gr++ )
+ for ( bl = 0; bl < 12; bl++ )
+ for ( ch = 0; ch < nch; ch++ )
+ WindowFilterSubband( &buffer[ch][gr * 12 * 32 + 32 * bl], ch,
+ &(*sb_sample)[ch][gr][bl][0] );
+ }
+
+#ifdef REFERENCECODE
+ {
+ /* Old code. left here for reference */
+ int gr, bl, ch;
+ for (gr = 0; gr < 3; gr++)
+ for (bl = 0; bl < SCALE_BLOCK; bl++)
+ for (ch = 0; ch < nch; ch++) {
+ window_subband (&win_buf[ch], &(*win_que)[ch][0], ch);
+ filter_subband (&(*win_que)[ch][0], &(*sb_sample)[ch][gr][bl][0]);
+ }
+ }
+#endif
+
+
+#ifdef NEWENCODE
+ scalefactor_calc_new(*sb_sample, scalar, nch, frame.sblimit);
+ find_sf_max (scalar, &frame, max_sc);
+ if (frame.actual_mode == MPG_MD_JOINT_STEREO) {
+ /* this way we calculate more mono than we need */
+ /* but it is cheap */
+ combine_LR_new (*sb_sample, *j_sample, frame.sblimit);
+ scalefactor_calc_new (j_sample, &j_scale, 1, frame.sblimit);
+ }
+#else
+ scale_factor_calc (*sb_sample, scalar, nch, frame.sblimit);
+ pick_scale (scalar, &frame, max_sc);
+ if (frame.actual_mode == MPG_MD_JOINT_STEREO) {
+ /* this way we calculate more mono than we need */
+ /* but it is cheap */
+ combine_LR (*sb_sample, *j_sample, frame.sblimit);
+ scale_factor_calc (j_sample, &j_scale, 1, frame.sblimit);
+ }
+#endif
+
+
+
+ if ((glopts.quickmode == TRUE) && (++psycount % glopts.quickcount != 0)) {
+ /* We're using quick mode, so we're only calculating the model every
+ 'quickcount' frames. Otherwise, just copy the old ones across */
+ for (int ch = 0; ch < nch; ch++) {
+ for (int sb = 0; sb < SBLIMIT; sb++)
+ smr[ch][sb] = smrdef[ch][sb];
+ }
+ }
+ else {
+ /* calculate the psymodel */
+ switch (model) {
+ case -1:
+ psycho_n1 (smr, nch);
+ break;
+ case 0: /* Psy Model A */
+ psycho_0 (smr, nch, scalar, (FLOAT) s_freq[header.version][header.sampling_frequency] * 1000);
+ break;
+ case 1:
+ psycho_1 (buffer, max_sc, smr, &frame);
+ break;
+ case 2:
+ for (int ch = 0; ch < nch; ch++) {
+ psycho_2 (&buffer[ch][0], &sam[ch][0], ch, &smr[ch][0], //snr32,
+ (FLOAT) s_freq[header.version][header.sampling_frequency] *
+ 1000, &glopts);
+ }
+ break;
+ case 3:
+ /* Modified psy model 1 */
+ psycho_3 (buffer, max_sc, smr, &frame, &glopts);
+ break;
+ case 4:
+ /* Modified Psycho Model 2 */
+ for (int ch = 0; ch < nch; ch++) {
+ psycho_4 (&buffer[ch][0], &sam[ch][0], ch, &smr[ch][0], // snr32,
+ (FLOAT) s_freq[header.version][header.sampling_frequency] *
+ 1000, &glopts);
+ }
+ break;
+ case 5:
+ /* Model 5 comparse model 1 and 3 */
+ psycho_1 (buffer, max_sc, smr, &frame);
+ fprintf(stdout,"1 ");
+ smr_dump(smr,nch);
+ psycho_3 (buffer, max_sc, smr, &frame, &glopts);
+ fprintf(stdout,"3 ");
+ smr_dump(smr,nch);
+ break;
+ case 6:
+ /* Model 6 compares model 2 and 4 */
+ for (int ch = 0; ch < nch; ch++)
+ psycho_2 (&buffer[ch][0], &sam[ch][0], ch, &smr[ch][0], //snr32,
+ (FLOAT) s_freq[header.version][header.sampling_frequency] *
+ 1000, &glopts);
+ fprintf(stdout,"2 ");
+ smr_dump(smr,nch);
+ for (int ch = 0; ch < nch; ch++)
+ psycho_4 (&buffer[ch][0], &sam[ch][0], ch, &smr[ch][0], // snr32,
+ (FLOAT) s_freq[header.version][header.sampling_frequency] *
+ 1000, &glopts);
+ fprintf(stdout,"4 ");
+ smr_dump(smr,nch);
+ break;
+ case 7:
+ fprintf(stdout,"Frame: %i\n",frameNum);
+ /* Dump the SMRs for all models */
+ psycho_1 (buffer, max_sc, smr, &frame);
+ fprintf(stdout,"1");
+ smr_dump(smr, nch);
+ psycho_3 (buffer, max_sc, smr, &frame, &glopts);
+ fprintf(stdout,"3");
+ smr_dump(smr,nch);
+ for (int ch = 0; ch < nch; ch++)
+ psycho_2 (&buffer[ch][0], &sam[ch][0], ch, &smr[ch][0], //snr32,
+ (FLOAT) s_freq[header.version][header.sampling_frequency] *
+ 1000, &glopts);
+ fprintf(stdout,"2");
+ smr_dump(smr,nch);
+ for (int ch = 0; ch < nch; ch++)
+ psycho_4 (&buffer[ch][0], &sam[ch][0], ch, &smr[ch][0], // snr32,
+ (FLOAT) s_freq[header.version][header.sampling_frequency] *
+ 1000, &glopts);
+ fprintf(stdout,"4");
+ smr_dump(smr,nch);
+ break;
+ case 8:
+ /* Compare 0 and 4 */
+ psycho_n1 (smr, nch);
+ fprintf(stdout,"0");
+ smr_dump(smr,nch);
+
+ for (int ch = 0; ch < nch; ch++)
+ psycho_4 (&buffer[ch][0], &sam[ch][0], ch, &smr[ch][0], // snr32,
+ (FLOAT) s_freq[header.version][header.sampling_frequency] *
+ 1000, &glopts);
+ fprintf(stdout,"4");
+ smr_dump(smr,nch);
+ break;
+ default:
+ fprintf (stderr, "Invalid psy model specification: %i\n", model);
+ exit (0);
+ }
+
+ if (glopts.quickmode == TRUE) {
+ /* copy the smr values and reuse them later */
+ for (int ch = 0; ch < nch; ch++) {
+ for (int sb = 0; sb < SBLIMIT; sb++)
+ smrdef[ch][sb] = smr[ch][sb];
+ }
+ }
+
+ if (glopts.verbosity > 4) {
+ smr_dump(smr, nch);
+ }
+ }
+
+#ifdef NEWENCODE
+ sf_transmission_pattern (scalar, scfsi, &frame);
+ main_bit_allocation_new (smr, scfsi, bit_alloc, &adb, &frame, &glopts);
+ //main_bit_allocation (smr, scfsi, bit_alloc, &adb, &frame, &glopts);
+
+ if (error_protection) {
+ CRC_calc (&frame, bit_alloc, scfsi, &crc);
+ }
+
+ write_header (&frame, &bs);
+ //encode_info (&frame, &bs);
+ if (error_protection) {
+ putbits (&bs, crc, 16);
+ }
+ write_bit_alloc (bit_alloc, &frame, &bs);
+ //encode_bit_alloc (bit_alloc, &frame, &bs);
+ write_scalefactors(bit_alloc, scfsi, scalar, &frame, &bs);
+ //encode_scale (bit_alloc, scfsi, scalar, &frame, &bs);
+ subband_quantization_new (scalar, *sb_sample, j_scale, *j_sample, bit_alloc,
+ *subband, &frame);
+ //subband_quantization (scalar, *sb_sample, j_scale, *j_sample, bit_alloc,
+ // *subband, &frame);
+ write_samples_new(*subband, bit_alloc, &frame, &bs);
+ //sample_encoding (*subband, bit_alloc, &frame, &bs);
+#else
+ transmission_pattern (scalar, scfsi, &frame);
+ main_bit_allocation (smr, scfsi, bit_alloc, &adb, &frame, &glopts);
+ if (error_protection) {
+ CRC_calc (&frame, bit_alloc, scfsi, &crc);
+ }
+ encode_info (&frame, &bs);
+ if (error_protection) {
+ encode_CRC (crc, &bs);
+ }
+ encode_bit_alloc (bit_alloc, &frame, &bs);
+ encode_scale (bit_alloc, scfsi, scalar, &frame, &bs);
+ subband_quantization (scalar, *sb_sample, j_scale, *j_sample, bit_alloc,
+ *subband, &frame);
+ sample_encoding (*subband, bit_alloc, &frame, &bs);
+#endif
+
+
+ /* If not all the bits were used, write out a stack of zeros */
+ for (int i = 0; i < adb; i++) {
+ put1bit (&bs, 0);
+ }
+
+
+ if (xpad_len) {
+ assert(xpad_len > 2);
+
+ // insert available X-PAD
+ for (int i = header.dab_length - xpad_len;
+ i < header.dab_length - FPAD_LENGTH;
+ i++) {
+ putbits (&bs, xpad_data[i], 8);
+ }
+ }
+
+
+ for (int i = header.dab_extension - 1; i >= 0; i--) {
+ CRC_calcDAB (&frame, bit_alloc, scfsi, scalar, &crc, i);
+ /* this crc is for the previous frame in DAB mode */
+ if (bs.buf_byte_idx + lg_frame < bs.buf_size)
+ bs.buf[bs.buf_byte_idx + lg_frame] = crc;
+ /* reserved 2 bytes for F-PAD in DAB mode */
+ putbits (&bs, crc, 8);
+ }
+
+ if (xpad_len) {
+ /* The F-PAD is also given us by mot-encoder */
+ putbits (&bs, xpad_data[header.dab_length - 2], 8);
+ putbits (&bs, xpad_data[header.dab_length - 1], 8);
+ }
+ else {
+ putbits (&bs, 0, 16); // FPAD is all-zero
+ }
+
+ return bs.output_buffer_written;
+}
+
+// Dump function for psy model comparison
+void smr_dump(double smr[2][SBLIMIT], int nch)
+{
+ fprintf(stdout, "SMR:");
+
+ for (int ch = 0; ch < nch; ch++) {
+ if (ch==1) {
+ fprintf(stdout, " ");
+ }
+ for (int sb = 0; sb < SBLIMIT; sb++) {
+ fprintf(stdout, "%3.0f ", smr[ch][sb]);
+ }
+ fprintf(stdout, "\n");
+ }
+}
+
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