* Copyright (c) 2006 Benjamin Larsson
* Copyright (c) 2006 Konstantin Shishkov
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
*/
/**
- * @file imc.c IMC - Intel Music Coder
+ * @file
+ * IMC - Intel Music Coder
* A mdct based codec using a 256 points large transform
- * divied into 32 bands with some mix of scale factors.
+ * divided into 32 bands with some mix of scale factors.
* Only mono is supported.
*
*/
#include <stddef.h>
#include <stdio.h>
-#define ALT_BITSTREAM_READER
#include "avcodec.h"
-#include "bitstream.h"
+#include "get_bits.h"
#include "dsputil.h"
+#include "fft.h"
+#include "libavutil/audioconvert.h"
+#include "sinewin.h"
#include "imcdata.h"
+#define IMC_BLOCK_SIZE 64
#define IMC_FRAME_ID 0x21
#define BANDS 32
#define COEFFS 256
-typedef struct {
+typedef struct IMCChannel {
float old_floor[BANDS];
float flcoeffs1[BANDS];
float flcoeffs2[BANDS];
float flcoeffs6[BANDS];
float CWdecoded[COEFFS];
- /** MDCT tables */
- //@{
- float mdct_sine_window[COEFFS];
- float post_cos[COEFFS];
- float post_sin[COEFFS];
- float pre_coef1[COEFFS];
- float pre_coef2[COEFFS];
- float last_fft_im[COEFFS];
- //@}
-
int bandWidthT[BANDS]; ///< codewords per band
int bitsBandT[BANDS]; ///< how many bits per codeword in band
int CWlengthT[COEFFS]; ///< how many bits in each codeword
int skipFlagCount[BANDS]; ///< skipped coeffients per band
int skipFlags[COEFFS]; ///< skip coefficient decoding or not
int codewords[COEFFS]; ///< raw codewords read from bitstream
+
+ float last_fft_im[COEFFS];
+
+ int decoder_reset;
+} IMCChannel;
+
+typedef struct {
+ AVFrame frame;
+
+ IMCChannel chctx[2];
+
+ /** MDCT tables */
+ //@{
+ float mdct_sine_window[COEFFS];
+ float post_cos[COEFFS];
+ float post_sin[COEFFS];
+ float pre_coef1[COEFFS];
+ float pre_coef2[COEFFS];
+ //@}
+
float sqrt_tab[30];
GetBitContext gb;
- VLC huffman_vlc[4][4];
- float flcf1, flcf2;
- int decoder_reset;
- float one_div_log2;
DSPContext dsp;
FFTContext fft;
- DECLARE_ALIGNED_16(FFTComplex, samples[COEFFS/2]);
- DECLARE_ALIGNED_16(float, out_samples[COEFFS]);
+ DECLARE_ALIGNED(32, FFTComplex, samples)[COEFFS / 2];
+ float *out_samples;
+
+ int8_t cyclTab[32], cyclTab2[32];
+ float weights1[31], weights2[31];
} IMCContext;
+static VLC huffman_vlc[4][4];
+
+#define VLC_TABLES_SIZE 9512
+
+static const int vlc_offsets[17] = {
+ 0, 640, 1156, 1732, 2308, 2852, 3396, 3924,
+ 4452, 5220, 5860, 6628, 7268, 7908, 8424, 8936, VLC_TABLES_SIZE
+};
+
+static VLC_TYPE vlc_tables[VLC_TABLES_SIZE][2];
+
+static inline double freq2bark(double freq)
+{
+ return 3.5 * atan((freq / 7500.0) * (freq / 7500.0)) + 13.0 * atan(freq * 0.00076);
+}
-static int imc_decode_init(AVCodecContext * avctx)
+static av_cold void iac_generate_tabs(IMCContext *q, int sampling_rate)
{
+ double freqmin[32], freqmid[32], freqmax[32];
+ double scale = sampling_rate / (256.0 * 2.0 * 2.0);
+ double nyquist_freq = sampling_rate * 0.5;
+ double freq, bark, prev_bark = 0, tf, tb;
int i, j;
+
+ for (i = 0; i < 32; i++) {
+ freq = (band_tab[i] + band_tab[i + 1] - 1) * scale;
+ bark = freq2bark(freq);
+
+ if (i > 0) {
+ tb = bark - prev_bark;
+ q->weights1[i - 1] = pow(10.0, -1.0 * tb);
+ q->weights2[i - 1] = pow(10.0, -2.7 * tb);
+ }
+ prev_bark = bark;
+
+ freqmid[i] = freq;
+
+ tf = freq;
+ while (tf < nyquist_freq) {
+ tf += 0.5;
+ tb = freq2bark(tf);
+ if (tb > bark + 0.5)
+ break;
+ }
+ freqmax[i] = tf;
+
+ tf = freq;
+ while (tf > 0.0) {
+ tf -= 0.5;
+ tb = freq2bark(tf);
+ if (tb <= bark - 0.5)
+ break;
+ }
+ freqmin[i] = tf;
+ }
+
+ for (i = 0; i < 32; i++) {
+ freq = freqmax[i];
+ for (j = 31; j > 0 && freq <= freqmid[j]; j--);
+ q->cyclTab[i] = j + 1;
+
+ freq = freqmin[i];
+ for (j = 0; j < 32 && freq >= freqmid[j]; j++);
+ q->cyclTab2[i] = j - 1;
+ }
+}
+
+static av_cold int imc_decode_init(AVCodecContext *avctx)
+{
+ int i, j, ret;
IMCContext *q = avctx->priv_data;
double r1, r2;
- q->decoder_reset = 1;
+ if ((avctx->codec_id == AV_CODEC_ID_IMC && avctx->channels != 1)
+ || (avctx->codec_id == AV_CODEC_ID_IAC && avctx->channels > 2)) {
+ av_log_ask_for_sample(avctx, "Number of channels is not supported\n");
+ return AVERROR_PATCHWELCOME;
+ }
+
+ for (j = 0; j < avctx->channels; j++) {
+ q->chctx[j].decoder_reset = 1;
- for(i = 0; i < BANDS; i++)
- q->old_floor[i] = 1.0;
+ for (i = 0; i < BANDS; i++)
+ q->chctx[j].old_floor[i] = 1.0;
+
+ for (i = 0; i < COEFFS / 2; i++)
+ q->chctx[j].last_fft_im[i] = 0;
+ }
/* Build mdct window, a simple sine window normalized with sqrt(2) */
- for(i = 0; i < COEFFS; i++)
- q->mdct_sine_window[i] = sin((i + 0.5) / 512.0 * M_PI) * sqrt(2.0);
- for(i = 0; i < COEFFS/2; i++){
- q->post_cos[i] = cos(i / 256.0 * M_PI);
- q->post_sin[i] = sin(i / 256.0 * M_PI);
+ ff_sine_window_init(q->mdct_sine_window, COEFFS);
+ for (i = 0; i < COEFFS; i++)
+ q->mdct_sine_window[i] *= sqrt(2.0);
+ for (i = 0; i < COEFFS / 2; i++) {
+ q->post_cos[i] = (1.0f / 32768) * cos(i / 256.0 * M_PI);
+ q->post_sin[i] = (1.0f / 32768) * sin(i / 256.0 * M_PI);
r1 = sin((i * 4.0 + 1.0) / 1024.0 * M_PI);
r2 = cos((i * 4.0 + 1.0) / 1024.0 * M_PI);
- if (i & 0x1)
- {
+ if (i & 0x1) {
q->pre_coef1[i] = (r1 + r2) * sqrt(2.0);
q->pre_coef2[i] = -(r1 - r2) * sqrt(2.0);
- }
- else
- {
+ } else {
q->pre_coef1[i] = -(r1 + r2) * sqrt(2.0);
q->pre_coef2[i] = (r1 - r2) * sqrt(2.0);
}
-
- q->last_fft_im[i] = 0;
}
- q->flcf1 = log2(10) * 0.05703125;
- q->flcf2 = log2(10) * 0.25;
/* Generate a square root table */
- for(i = 0; i < 30; i++) {
+ for (i = 0; i < 30; i++)
q->sqrt_tab[i] = sqrt(i);
- }
/* initialize the VLC tables */
- for(i = 0; i < 4 ; i++) {
- for(j = 0; j < 4; j++) {
- init_vlc (&q->huffman_vlc[i][j], 9, imc_huffman_sizes[i],
+ for (i = 0; i < 4 ; i++) {
+ for (j = 0; j < 4; j++) {
+ huffman_vlc[i][j].table = &vlc_tables[vlc_offsets[i * 4 + j]];
+ huffman_vlc[i][j].table_allocated = vlc_offsets[i * 4 + j + 1] - vlc_offsets[i * 4 + j];
+ init_vlc(&huffman_vlc[i][j], 9, imc_huffman_sizes[i],
imc_huffman_lens[i][j], 1, 1,
- imc_huffman_bits[i][j], 2, 2, 1);
+ imc_huffman_bits[i][j], 2, 2, INIT_VLC_USE_NEW_STATIC);
}
}
- q->one_div_log2 = 1/log(2);
- ff_fft_init(&q->fft, 7, 1);
- dsputil_init(&q->dsp, avctx);
+ if (avctx->codec_id == AV_CODEC_ID_IAC) {
+ iac_generate_tabs(q, avctx->sample_rate);
+ } else {
+ memcpy(q->cyclTab, cyclTab, sizeof(cyclTab));
+ memcpy(q->cyclTab2, cyclTab2, sizeof(cyclTab2));
+ memcpy(q->weights1, imc_weights1, sizeof(imc_weights1));
+ memcpy(q->weights2, imc_weights2, sizeof(imc_weights2));
+ }
+
+ if ((ret = ff_fft_init(&q->fft, 7, 1))) {
+ av_log(avctx, AV_LOG_INFO, "FFT init failed\n");
+ return ret;
+ }
+ ff_dsputil_init(&q->dsp, avctx);
+ avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
+ avctx->channel_layout = avctx->channels == 1 ? AV_CH_LAYOUT_MONO
+ : AV_CH_LAYOUT_STEREO;
+
+ avcodec_get_frame_defaults(&q->frame);
+ avctx->coded_frame = &q->frame;
+
return 0;
}
-static void imc_calculate_coeffs(IMCContext* q, float* flcoeffs1, float* flcoeffs2, int* bandWidthT,
- float* flcoeffs3, float* flcoeffs5)
+static void imc_calculate_coeffs(IMCContext *q, float *flcoeffs1,
+ float *flcoeffs2, int *bandWidthT,
+ float *flcoeffs3, float *flcoeffs5)
{
float workT1[BANDS];
float workT2[BANDS];
float accum = 0.0;
int i, cnt2;
- for(i = 0; i < BANDS; i++) {
+ for (i = 0; i < BANDS; i++) {
flcoeffs5[i] = workT2[i] = 0.0;
- if (bandWidthT[i]){
+ if (bandWidthT[i]) {
workT1[i] = flcoeffs1[i] * flcoeffs1[i];
flcoeffs3[i] = 2.0 * flcoeffs2[i];
} else {
- workT1[i] = 0.0;
+ workT1[i] = 0.0;
flcoeffs3[i] = -30000.0;
}
workT3[i] = bandWidthT[i] * workT1[i] * 0.01;
workT3[i] = 0.0;
}
- for(i = 0; i < BANDS; i++) {
- for(cnt2 = i; cnt2 < cyclTab[i]; cnt2++)
+ for (i = 0; i < BANDS; i++) {
+ for (cnt2 = i; cnt2 < q->cyclTab[i]; cnt2++)
flcoeffs5[cnt2] = flcoeffs5[cnt2] + workT3[i];
- workT2[cnt2-1] = workT2[cnt2-1] + workT3[i];
+ workT2[cnt2 - 1] = workT2[cnt2 - 1] + workT3[i];
}
- for(i = 1; i < BANDS; i++) {
- accum = (workT2[i-1] + accum) * imc_weights1[i-1];
+ for (i = 1; i < BANDS; i++) {
+ accum = (workT2[i - 1] + accum) * q->weights1[i - 1];
flcoeffs5[i] += accum;
}
- for(i = 0; i < BANDS; i++)
+ for (i = 0; i < BANDS; i++)
workT2[i] = 0.0;
- for(i = 0; i < BANDS; i++) {
- for(cnt2 = i-1; cnt2 > cyclTab2[i]; cnt2--)
+ for (i = 0; i < BANDS; i++) {
+ for (cnt2 = i - 1; cnt2 > q->cyclTab2[i]; cnt2--)
flcoeffs5[cnt2] += workT3[i];
workT2[cnt2+1] += workT3[i];
}
accum = 0.0;
- for(i = BANDS-2; i >= 0; i--) {
- accum = (workT2[i+1] + accum) * imc_weights2[i];
+ for (i = BANDS-2; i >= 0; i--) {
+ accum = (workT2[i+1] + accum) * q->weights2[i];
flcoeffs5[i] += accum;
- //there is missing code here, but it seems to never be triggered
+ // there is missing code here, but it seems to never be triggered
}
}
-static void imc_read_level_coeffs(IMCContext* q, int stream_format_code, int* levlCoeffs)
+static void imc_read_level_coeffs(IMCContext *q, int stream_format_code,
+ int *levlCoeffs)
{
int i;
VLC *hufftab[4];
int s;
s = stream_format_code >> 1;
- hufftab[0] = &q->huffman_vlc[s][0];
- hufftab[1] = &q->huffman_vlc[s][1];
- hufftab[2] = &q->huffman_vlc[s][2];
- hufftab[3] = &q->huffman_vlc[s][3];
+ hufftab[0] = &huffman_vlc[s][0];
+ hufftab[1] = &huffman_vlc[s][1];
+ hufftab[2] = &huffman_vlc[s][2];
+ hufftab[3] = &huffman_vlc[s][3];
cb_sel = imc_cb_select[s];
- if(stream_format_code & 4)
+ if (stream_format_code & 4)
start = 1;
- if(start)
+ if (start)
levlCoeffs[0] = get_bits(&q->gb, 7);
- for(i = start; i < BANDS; i++){
- levlCoeffs[i] = get_vlc2(&q->gb, hufftab[cb_sel[i]]->table, hufftab[cb_sel[i]]->bits, 2);
- if(levlCoeffs[i] == 17)
+ for (i = start; i < BANDS; i++) {
+ levlCoeffs[i] = get_vlc2(&q->gb, hufftab[cb_sel[i]]->table,
+ hufftab[cb_sel[i]]->bits, 2);
+ if (levlCoeffs[i] == 17)
levlCoeffs[i] += get_bits(&q->gb, 4);
}
}
-static void imc_decode_level_coefficients(IMCContext* q, int* levlCoeffBuf, float* flcoeffs1,
- float* flcoeffs2)
+static void imc_decode_level_coefficients(IMCContext *q, int *levlCoeffBuf,
+ float *flcoeffs1, float *flcoeffs2)
{
int i, level;
float tmp, tmp2;
- //maybe some frequency division thingy
+ // maybe some frequency division thingy
- flcoeffs1[0] = 20000.0 / pow (2, levlCoeffBuf[0] * q->flcf1);
- flcoeffs2[0] = log2(flcoeffs1[0]);
- tmp = flcoeffs1[0];
+ flcoeffs1[0] = 20000.0 / pow (2, levlCoeffBuf[0] * 0.18945); // 0.18945 = log2(10) * 0.05703125
+ flcoeffs2[0] = log2f(flcoeffs1[0]);
+ tmp = flcoeffs1[0];
tmp2 = flcoeffs2[0];
- for(i = 1; i < BANDS; i++) {
+ for (i = 1; i < BANDS; i++) {
level = levlCoeffBuf[i];
if (level == 16) {
flcoeffs1[i] = 1.0;
flcoeffs2[i] = 0.0;
} else {
if (level < 17)
- level -=7;
+ level -= 7;
else if (level <= 24)
- level -=32;
+ level -= 32;
else
- level -=16;
+ level -= 16;
tmp *= imc_exp_tab[15 + level];
- tmp2 += q->flcf2 * level;
+ tmp2 += 0.83048 * level; // 0.83048 = log2(10) * 0.25
flcoeffs1[i] = tmp;
flcoeffs2[i] = tmp2;
}
}
-static void imc_decode_level_coefficients2(IMCContext* q, int* levlCoeffBuf, float* old_floor, float* flcoeffs1,
- float* flcoeffs2) {
+static void imc_decode_level_coefficients2(IMCContext *q, int *levlCoeffBuf,
+ float *old_floor, float *flcoeffs1,
+ float *flcoeffs2)
+{
int i;
- //FIXME maybe flag_buf = noise coding and flcoeffs1 = new scale factors
- // and flcoeffs2 old scale factors
- // might be incomplete due to a missing table that is in the binary code
- for(i = 0; i < BANDS; i++) {
+ /* FIXME maybe flag_buf = noise coding and flcoeffs1 = new scale factors
+ * and flcoeffs2 old scale factors
+ * might be incomplete due to a missing table that is in the binary code
+ */
+ for (i = 0; i < BANDS; i++) {
flcoeffs1[i] = 0;
- if(levlCoeffBuf[i] < 16) {
+ if (levlCoeffBuf[i] < 16) {
flcoeffs1[i] = imc_exp_tab2[levlCoeffBuf[i]] * old_floor[i];
- flcoeffs2[i] = (levlCoeffBuf[i]-7) * q->flcf2 + flcoeffs2[i];
+ flcoeffs2[i] = (levlCoeffBuf[i] - 7) * 0.83048 + flcoeffs2[i]; // 0.83048 = log2(10) * 0.25
} else {
flcoeffs1[i] = old_floor[i];
}
/**
* Perform bit allocation depending on bits available
*/
-static int bit_allocation (IMCContext* q, int stream_format_code, int freebits, int flag) {
+static int bit_allocation(IMCContext *q, IMCChannel *chctx,
+ int stream_format_code, int freebits, int flag)
+{
int i, j;
const float limit = -1.e20;
float highest = 0.0;
int flg;
int found_indx = 0;
- for(i = 0; i < BANDS; i++)
- highest = FFMAX(highest, q->flcoeffs1[i]);
+ for (i = 0; i < BANDS; i++)
+ highest = FFMAX(highest, chctx->flcoeffs1[i]);
- for(i = 0; i < BANDS-1; i++) {
- q->flcoeffs4[i] = q->flcoeffs3[i] - log2(q->flcoeffs5[i]);
- }
- q->flcoeffs4[BANDS - 1] = limit;
+ for (i = 0; i < BANDS - 1; i++)
+ chctx->flcoeffs4[i] = chctx->flcoeffs3[i] - log2f(chctx->flcoeffs5[i]);
+ chctx->flcoeffs4[BANDS - 1] = limit;
highest = highest * 0.25;
- for(i = 0; i < BANDS; i++) {
+ for (i = 0; i < BANDS; i++) {
indx = -1;
- if ((band_tab[i+1] - band_tab[i]) == q->bandWidthT[i])
+ if ((band_tab[i + 1] - band_tab[i]) == chctx->bandWidthT[i])
indx = 0;
- if ((band_tab[i+1] - band_tab[i]) > q->bandWidthT[i])
+ if ((band_tab[i + 1] - band_tab[i]) > chctx->bandWidthT[i])
indx = 1;
- if (((band_tab[i+1] - band_tab[i])/2) >= q->bandWidthT[i])
+ if (((band_tab[i + 1] - band_tab[i]) / 2) >= chctx->bandWidthT[i])
indx = 2;
if (indx == -1)
- return -1;
+ return AVERROR_INVALIDDATA;
- q->flcoeffs4[i] = q->flcoeffs4[i] + xTab[(indx*2 + (q->flcoeffs1[i] < highest)) * 2 + flag];
+ chctx->flcoeffs4[i] += xTab[(indx * 2 + (chctx->flcoeffs1[i] < highest)) * 2 + flag];
}
if (stream_format_code & 0x2) {
- q->flcoeffs4[0] = limit;
- q->flcoeffs4[1] = limit;
- q->flcoeffs4[2] = limit;
- q->flcoeffs4[3] = limit;
+ chctx->flcoeffs4[0] = limit;
+ chctx->flcoeffs4[1] = limit;
+ chctx->flcoeffs4[2] = limit;
+ chctx->flcoeffs4[3] = limit;
}
- for(i = (stream_format_code & 0x2)?4:0; i < BANDS-1; i++) {
- iacc += q->bandWidthT[i];
- summa += q->bandWidthT[i] * q->flcoeffs4[i];
+ for (i = (stream_format_code & 0x2) ? 4 : 0; i < BANDS - 1; i++) {
+ iacc += chctx->bandWidthT[i];
+ summa += chctx->bandWidthT[i] * chctx->flcoeffs4[i];
}
- q->bandWidthT[BANDS-1] = 0;
+ chctx->bandWidthT[BANDS - 1] = 0;
summa = (summa * 0.5 - freebits) / iacc;
- for(i = 0; i < BANDS/2; i++) {
+ for (i = 0; i < BANDS / 2; i++) {
rres = summer - freebits;
- if((rres >= -8) && (rres <= 8)) break;
+ if ((rres >= -8) && (rres <= 8))
+ break;
summer = 0;
- iacc = 0;
+ iacc = 0;
- for(j = (stream_format_code & 0x2)?4:0; j < BANDS; j++) {
- cwlen = clip((int)((q->flcoeffs4[j] * 0.5) - summa + 0.5), 0, 6);
+ for (j = (stream_format_code & 0x2) ? 4 : 0; j < BANDS; j++) {
+ cwlen = av_clipf(((chctx->flcoeffs4[j] * 0.5) - summa + 0.5), 0, 6);
- q->bitsBandT[j] = cwlen;
- summer += q->bandWidthT[j] * cwlen;
+ chctx->bitsBandT[j] = cwlen;
+ summer += chctx->bandWidthT[j] * cwlen;
if (cwlen > 0)
- iacc += q->bandWidthT[j];
+ iacc += chctx->bandWidthT[j];
}
flg = t2;
t2 = -1;
if (i == 0)
flg = t2;
- if(flg != t2)
+ if (flg != t2)
t1++;
summa = (float)(summer - freebits) / ((t1 + 1) * iacc) + summa;
}
- for(i = (stream_format_code & 0x2)?4:0; i < BANDS; i++) {
- for(j = band_tab[i]; j < band_tab[i+1]; j++)
- q->CWlengthT[j] = q->bitsBandT[i];
+ for (i = (stream_format_code & 0x2) ? 4 : 0; i < BANDS; i++) {
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++)
+ chctx->CWlengthT[j] = chctx->bitsBandT[i];
}
if (freebits > summer) {
- for(i = 0; i < BANDS; i++) {
- workT[i] = (q->bitsBandT[i] == 6) ? -1.e20 : (q->bitsBandT[i] * -2 + q->flcoeffs4[i] - 0.415);
+ for (i = 0; i < BANDS; i++) {
+ workT[i] = (chctx->bitsBandT[i] == 6) ? -1.e20
+ : (chctx->bitsBandT[i] * -2 + chctx->flcoeffs4[i] - 0.415);
}
highest = 0.0;
- do{
+ do {
if (highest <= -1.e20)
break;
found_indx = 0;
highest = -1.e20;
- for(i = 0; i < BANDS; i++) {
+ for (i = 0; i < BANDS; i++) {
if (workT[i] > highest) {
highest = workT[i];
found_indx = i;
if (highest > -1.e20) {
workT[found_indx] -= 2.0;
- if (++(q->bitsBandT[found_indx]) == 6)
+ if (++chctx->bitsBandT[found_indx] == 6)
workT[found_indx] = -1.e20;
- for(j = band_tab[found_indx]; j < band_tab[found_indx+1] && (freebits > summer); j++){
- q->CWlengthT[j]++;
+ for (j = band_tab[found_indx]; j < band_tab[found_indx + 1] && (freebits > summer); j++) {
+ chctx->CWlengthT[j]++;
summer++;
}
}
- }while (freebits > summer);
+ } while (freebits > summer);
}
if (freebits < summer) {
- for(i = 0; i < BANDS; i++) {
- workT[i] = q->bitsBandT[i] ? (q->bitsBandT[i] * -2 + q->flcoeffs4[i] + 1.585) : 1.e20;
+ for (i = 0; i < BANDS; i++) {
+ workT[i] = chctx->bitsBandT[i] ? (chctx->bitsBandT[i] * -2 + chctx->flcoeffs4[i] + 1.585)
+ : 1.e20;
}
if (stream_format_code & 0x2) {
workT[0] = 1.e20;
workT[2] = 1.e20;
workT[3] = 1.e20;
}
- while (freebits < summer){
- lowest = 1.e10;
+ while (freebits < summer) {
+ lowest = 1.e10;
low_indx = 0;
- for(i = 0; i < BANDS; i++) {
+ for (i = 0; i < BANDS; i++) {
if (workT[i] < lowest) {
- lowest = workT[i];
+ lowest = workT[i];
low_indx = i;
}
}
- //if(lowest >= 1.e10) break;
+ // if (lowest >= 1.e10)
+ // break;
workT[low_indx] = lowest + 2.0;
- if (!(--q->bitsBandT[low_indx]))
+ if (!--chctx->bitsBandT[low_indx])
workT[low_indx] = 1.e20;
- for(j = band_tab[low_indx]; j < band_tab[low_indx+1] && (freebits < summer); j++){
- if(q->CWlengthT[j] > 0){
- q->CWlengthT[j]--;
+ for (j = band_tab[low_indx]; j < band_tab[low_indx+1] && (freebits < summer); j++) {
+ if (chctx->CWlengthT[j] > 0) {
+ chctx->CWlengthT[j]--;
summer--;
}
}
return 0;
}
-static void imc_get_skip_coeff(IMCContext* q) {
+static void imc_get_skip_coeff(IMCContext *q, IMCChannel *chctx)
+{
int i, j;
- memset(q->skipFlagBits, 0, sizeof(q->skipFlagBits));
- memset(q->skipFlagCount, 0, sizeof(q->skipFlagCount));
- for(i = 0; i < BANDS; i++) {
- if (!q->bandFlagsBuf[i] || !q->bandWidthT[i])
+ memset(chctx->skipFlagBits, 0, sizeof(chctx->skipFlagBits));
+ memset(chctx->skipFlagCount, 0, sizeof(chctx->skipFlagCount));
+ for (i = 0; i < BANDS; i++) {
+ if (!chctx->bandFlagsBuf[i] || !chctx->bandWidthT[i])
continue;
- if (!q->skipFlagRaw[i]) {
- q->skipFlagBits[i] = band_tab[i+1] - band_tab[i];
+ if (!chctx->skipFlagRaw[i]) {
+ chctx->skipFlagBits[i] = band_tab[i + 1] - band_tab[i];
- for(j = band_tab[i]; j < band_tab[i+1]; j++) {
- if ((q->skipFlags[j] = get_bits(&q->gb,1)))
- q->skipFlagCount[i]++;
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
+ chctx->skipFlags[j] = get_bits1(&q->gb);
+ if (chctx->skipFlags[j])
+ chctx->skipFlagCount[i]++;
}
} else {
- for(j = band_tab[i]; j < (band_tab[i+1]-1); j += 2) {
- if(!get_bits1(&q->gb)){//0
- q->skipFlagBits[i]++;
- q->skipFlags[j]=1;
- q->skipFlags[j+1]=1;
- q->skipFlagCount[i] += 2;
- }else{
- if(get_bits1(&q->gb)){//11
- q->skipFlagBits[i] +=2;
- q->skipFlags[j]=0;
- q->skipFlags[j+1]=1;
- q->skipFlagCount[i]++;
- }else{
- q->skipFlagBits[i] +=3;
- q->skipFlags[j+1]=0;
- if(!get_bits1(&q->gb)){//100
- q->skipFlags[j]=1;
- q->skipFlagCount[i]++;
- }else{//101
- q->skipFlags[j]=0;
+ for (j = band_tab[i]; j < band_tab[i + 1] - 1; j += 2) {
+ if (!get_bits1(&q->gb)) { // 0
+ chctx->skipFlagBits[i]++;
+ chctx->skipFlags[j] = 1;
+ chctx->skipFlags[j + 1] = 1;
+ chctx->skipFlagCount[i] += 2;
+ } else {
+ if (get_bits1(&q->gb)) { // 11
+ chctx->skipFlagBits[i] += 2;
+ chctx->skipFlags[j] = 0;
+ chctx->skipFlags[j + 1] = 1;
+ chctx->skipFlagCount[i]++;
+ } else {
+ chctx->skipFlagBits[i] += 3;
+ chctx->skipFlags[j + 1] = 0;
+ if (!get_bits1(&q->gb)) { // 100
+ chctx->skipFlags[j] = 1;
+ chctx->skipFlagCount[i]++;
+ } else { // 101
+ chctx->skipFlags[j] = 0;
}
}
}
}
- if (j < band_tab[i+1]) {
- q->skipFlagBits[i]++;
- if ((q->skipFlags[j] = get_bits(&q->gb,1)))
- q->skipFlagCount[i]++;
+ if (j < band_tab[i + 1]) {
+ chctx->skipFlagBits[i]++;
+ if ((chctx->skipFlags[j] = get_bits1(&q->gb)))
+ chctx->skipFlagCount[i]++;
}
}
}
/**
* Increase highest' band coefficient sizes as some bits won't be used
*/
-static void imc_adjust_bit_allocation (IMCContext* q, int summer) {
+static void imc_adjust_bit_allocation(IMCContext *q, IMCChannel *chctx,
+ int summer)
+{
float workT[32];
int corrected = 0;
int i, j;
- float highest = 0;
- int found_indx=0;
+ float highest = 0;
+ int found_indx = 0;
- for(i = 0; i < BANDS; i++) {
- workT[i] = (q->bitsBandT[i] == 6) ? -1.e20 : (q->bitsBandT[i] * -2 + q->flcoeffs4[i] - 0.415);
+ for (i = 0; i < BANDS; i++) {
+ workT[i] = (chctx->bitsBandT[i] == 6) ? -1.e20
+ : (chctx->bitsBandT[i] * -2 + chctx->flcoeffs4[i] - 0.415);
}
while (corrected < summer) {
- if(highest <= -1.e20)
+ if (highest <= -1.e20)
break;
highest = -1.e20;
- for(i = 0; i < BANDS; i++) {
+ for (i = 0; i < BANDS; i++) {
if (workT[i] > highest) {
highest = workT[i];
found_indx = i;
if (highest > -1.e20) {
workT[found_indx] -= 2.0;
- if (++(q->bitsBandT[found_indx]) == 6)
+ if (++(chctx->bitsBandT[found_indx]) == 6)
workT[found_indx] = -1.e20;
- for(j = band_tab[found_indx]; j < band_tab[found_indx+1] && (corrected < summer); j++) {
- if (!q->skipFlags[j] && (q->CWlengthT[j] < 6)) {
- q->CWlengthT[j]++;
+ for (j = band_tab[found_indx]; j < band_tab[found_indx+1] && (corrected < summer); j++) {
+ if (!chctx->skipFlags[j] && (chctx->CWlengthT[j] < 6)) {
+ chctx->CWlengthT[j]++;
corrected++;
}
}
}
}
-void imc_imdct256(IMCContext *q) {
+static void imc_imdct256(IMCContext *q, IMCChannel *chctx, int channels)
+{
int i;
float re, im;
+ float *dst1 = q->out_samples;
+ float *dst2 = q->out_samples + (COEFFS - 1);
/* prerotation */
- for(i=0; i < COEFFS/2; i++){
- q->samples[i].re = -(q->pre_coef1[i] * q->CWdecoded[COEFFS-1-i*2]) -
- (q->pre_coef2[i] * q->CWdecoded[i*2]);
- q->samples[i].im = (q->pre_coef2[i] * q->CWdecoded[COEFFS-1-i*2]) -
- (q->pre_coef1[i] * q->CWdecoded[i*2]);
+ for (i = 0; i < COEFFS / 2; i++) {
+ q->samples[i].re = -(q->pre_coef1[i] * chctx->CWdecoded[COEFFS - 1 - i * 2]) -
+ (q->pre_coef2[i] * chctx->CWdecoded[i * 2]);
+ q->samples[i].im = (q->pre_coef2[i] * chctx->CWdecoded[COEFFS - 1 - i * 2]) -
+ (q->pre_coef1[i] * chctx->CWdecoded[i * 2]);
}
/* FFT */
- ff_fft_permute(&q->fft, q->samples);
- ff_fft_calc (&q->fft, q->samples);
+ q->fft.fft_permute(&q->fft, q->samples);
+ q->fft.fft_calc(&q->fft, q->samples);
/* postrotation, window and reorder */
- for(i = 0; i < COEFFS/2; i++){
- re = (q->samples[i].re * q->post_cos[i]) + (-q->samples[i].im * q->post_sin[i]);
- im = (-q->samples[i].im * q->post_cos[i]) - (q->samples[i].re * q->post_sin[i]);
- q->out_samples[i*2] = (q->mdct_sine_window[COEFFS-1-i*2] * q->last_fft_im[i]) + (q->mdct_sine_window[i*2] * re);
- q->out_samples[COEFFS-1-i*2] = (q->mdct_sine_window[i*2] * q->last_fft_im[i]) - (q->mdct_sine_window[COEFFS-1-i*2] * re);
- q->last_fft_im[i] = im;
+ for (i = 0; i < COEFFS / 2; i++) {
+ re = ( q->samples[i].re * q->post_cos[i]) + (-q->samples[i].im * q->post_sin[i]);
+ im = (-q->samples[i].im * q->post_cos[i]) - ( q->samples[i].re * q->post_sin[i]);
+ *dst1 = (q->mdct_sine_window[COEFFS - 1 - i * 2] * chctx->last_fft_im[i])
+ + (q->mdct_sine_window[i * 2] * re);
+ *dst2 = (q->mdct_sine_window[i * 2] * chctx->last_fft_im[i])
+ - (q->mdct_sine_window[COEFFS - 1 - i * 2] * re);
+ dst1 += 2;
+ dst2 -= 2;
+ chctx->last_fft_im[i] = im;
}
}
-static int inverse_quant_coeff (IMCContext* q, int stream_format_code) {
+static int inverse_quant_coeff(IMCContext *q, IMCChannel *chctx,
+ int stream_format_code)
+{
int i, j;
int middle_value, cw_len, max_size;
- const float* quantizer;
+ const float *quantizer;
- for(i = 0; i < BANDS; i++) {
- for(j = band_tab[i]; j < band_tab[i+1]; j++) {
- q->CWdecoded[j] = 0;
- cw_len = q->CWlengthT[j];
+ for (i = 0; i < BANDS; i++) {
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
+ chctx->CWdecoded[j] = 0;
+ cw_len = chctx->CWlengthT[j];
- if (cw_len <= 0 || q->skipFlags[j])
+ if (cw_len <= 0 || chctx->skipFlags[j])
continue;
- max_size = 1 << cw_len;
+ max_size = 1 << cw_len;
middle_value = max_size >> 1;
- if (q->codewords[j] >= max_size || q->codewords[j] < 0)
- return -1;
+ if (chctx->codewords[j] >= max_size || chctx->codewords[j] < 0)
+ return AVERROR_INVALIDDATA;
- if (cw_len >= 4){
+ if (cw_len >= 4) {
quantizer = imc_quantizer2[(stream_format_code & 2) >> 1];
- if (q->codewords[j] >= middle_value)
- q->CWdecoded[j] = quantizer[q->codewords[j] - 8] * q->flcoeffs6[i];
+ if (chctx->codewords[j] >= middle_value)
+ chctx->CWdecoded[j] = quantizer[chctx->codewords[j] - 8] * chctx->flcoeffs6[i];
else
- q->CWdecoded[j] = -quantizer[max_size - q->codewords[j] - 8 - 1] * q->flcoeffs6[i];
+ chctx->CWdecoded[j] = -quantizer[max_size - chctx->codewords[j] - 8 - 1] * chctx->flcoeffs6[i];
}else{
- quantizer = imc_quantizer1[((stream_format_code & 2) >> 1) | (q->bandFlagsBuf[i] << 1)];
- if (q->codewords[j] >= middle_value)
- q->CWdecoded[j] = quantizer[q->codewords[j] - 1] * q->flcoeffs6[i];
+ quantizer = imc_quantizer1[((stream_format_code & 2) >> 1) | (chctx->bandFlagsBuf[i] << 1)];
+ if (chctx->codewords[j] >= middle_value)
+ chctx->CWdecoded[j] = quantizer[chctx->codewords[j] - 1] * chctx->flcoeffs6[i];
else
- q->CWdecoded[j] = -quantizer[max_size - 2 - q->codewords[j]] * q->flcoeffs6[i];
+ chctx->CWdecoded[j] = -quantizer[max_size - 2 - chctx->codewords[j]] * chctx->flcoeffs6[i];
}
}
}
}
-static int imc_get_coeffs (IMCContext* q) {
+static int imc_get_coeffs(IMCContext *q, IMCChannel *chctx)
+{
int i, j, cw_len, cw;
- for(i = 0; i < BANDS; i++) {
- if(!q->sumLenArr[i]) continue;
- if (q->bandFlagsBuf[i] || q->bandWidthT[i]) {
- for(j = band_tab[i]; j < band_tab[i+1]; j++) {
- cw_len = q->CWlengthT[j];
+ for (i = 0; i < BANDS; i++) {
+ if (!chctx->sumLenArr[i])
+ continue;
+ if (chctx->bandFlagsBuf[i] || chctx->bandWidthT[i]) {
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
+ cw_len = chctx->CWlengthT[j];
cw = 0;
- if (get_bits_count(&q->gb) + cw_len > 512){
-//av_log(NULL,0,"Band %i coeff %i cw_len %i\n",i,j,cw_len);
- return -1;
+ if (get_bits_count(&q->gb) + cw_len > 512) {
+ av_dlog(NULL, "Band %i coeff %i cw_len %i\n", i, j, cw_len);
+ return AVERROR_INVALIDDATA;
}
- if(cw_len && (!q->bandFlagsBuf[i] || !q->skipFlags[j]))
+ if (cw_len && (!chctx->bandFlagsBuf[i] || !chctx->skipFlags[j]))
cw = get_bits(&q->gb, cw_len);
- q->codewords[j] = cw;
+ chctx->codewords[j] = cw;
}
}
}
return 0;
}
-static int imc_decode_frame(AVCodecContext * avctx,
- void *data, int *data_size,
- uint8_t * buf, int buf_size)
+static int imc_decode_block(AVCodecContext *avctx, IMCContext *q, int ch)
{
-
- IMCContext *q = avctx->priv_data;
-
int stream_format_code;
- int imc_hdr, i, j;
+ int imc_hdr, i, j, ret;
int flag;
int bits, summer;
int counter, bitscount;
- uint16_t *buf16 = (uint16_t *) buf;
-
- /* FIXME: input should not be modified */
- for(i = 0; i < FFMIN(buf_size, avctx->block_align) / 2; i++)
- buf16[i] = bswap_16(buf16[i]);
+ IMCChannel *chctx = q->chctx + ch;
- init_get_bits(&q->gb, buf, 512);
/* Check the frame header */
imc_hdr = get_bits(&q->gb, 9);
- if (imc_hdr != IMC_FRAME_ID) {
- av_log(avctx, AV_LOG_ERROR, "imc frame header check failed!\n");
- av_log(avctx, AV_LOG_ERROR, "got %x instead of 0x21.\n", imc_hdr);
- return -1;
+ if (imc_hdr & 0x18) {
+ av_log(avctx, AV_LOG_ERROR, "frame header check failed!\n");
+ av_log(avctx, AV_LOG_ERROR, "got %X.\n", imc_hdr);
+ return AVERROR_INVALIDDATA;
}
stream_format_code = get_bits(&q->gb, 3);
- if(stream_format_code & 1){
- av_log(avctx, AV_LOG_ERROR, "Stream code format %X is not supported\n", stream_format_code);
- return -1;
+ if (stream_format_code & 1) {
+ av_log_ask_for_sample(avctx, "Stream format %X is not supported\n",
+ stream_format_code);
+ return AVERROR_PATCHWELCOME;
}
-// av_log(avctx, AV_LOG_DEBUG, "stream_format_code = %d\n", stream_format_code);
-
if (stream_format_code & 0x04)
- q->decoder_reset = 1;
+ chctx->decoder_reset = 1;
- if(q->decoder_reset) {
- memset(q->out_samples, 0, sizeof(q->out_samples));
- for(i = 0; i < BANDS; i++)q->old_floor[i] = 1.0;
- for(i = 0; i < COEFFS; i++)q->CWdecoded[i] = 0;
- q->decoder_reset = 0;
+ if (chctx->decoder_reset) {
+ for (i = 0; i < BANDS; i++)
+ chctx->old_floor[i] = 1.0;
+ for (i = 0; i < COEFFS; i++)
+ chctx->CWdecoded[i] = 0;
+ chctx->decoder_reset = 0;
}
flag = get_bits1(&q->gb);
- imc_read_level_coeffs(q, stream_format_code, q->levlCoeffBuf);
+ imc_read_level_coeffs(q, stream_format_code, chctx->levlCoeffBuf);
if (stream_format_code & 0x4)
- imc_decode_level_coefficients(q, q->levlCoeffBuf, q->flcoeffs1, q->flcoeffs2);
+ imc_decode_level_coefficients(q, chctx->levlCoeffBuf,
+ chctx->flcoeffs1, chctx->flcoeffs2);
else
- imc_decode_level_coefficients2(q, q->levlCoeffBuf, q->old_floor, q->flcoeffs1, q->flcoeffs2);
+ imc_decode_level_coefficients2(q, chctx->levlCoeffBuf, chctx->old_floor,
+ chctx->flcoeffs1, chctx->flcoeffs2);
- memcpy(q->old_floor, q->flcoeffs1, 32 * sizeof(float));
+ memcpy(chctx->old_floor, chctx->flcoeffs1, 32 * sizeof(float));
counter = 0;
- for (i=0 ; i<BANDS ; i++) {
- if (q->levlCoeffBuf[i] == 16) {
- q->bandWidthT[i] = 0;
+ for (i = 0; i < BANDS; i++) {
+ if (chctx->levlCoeffBuf[i] == 16) {
+ chctx->bandWidthT[i] = 0;
counter++;
} else
- q->bandWidthT[i] = band_tab[i+1] - band_tab[i];
+ chctx->bandWidthT[i] = band_tab[i + 1] - band_tab[i];
}
- memset(q->bandFlagsBuf, 0, BANDS * sizeof(int));
- for(i = 0; i < BANDS-1; i++) {
- if (q->bandWidthT[i])
- q->bandFlagsBuf[i] = get_bits1(&q->gb);
+ memset(chctx->bandFlagsBuf, 0, BANDS * sizeof(int));
+ for (i = 0; i < BANDS - 1; i++) {
+ if (chctx->bandWidthT[i])
+ chctx->bandFlagsBuf[i] = get_bits1(&q->gb);
}
- imc_calculate_coeffs(q, q->flcoeffs1, q->flcoeffs2, q->bandWidthT, q->flcoeffs3, q->flcoeffs5);
+ imc_calculate_coeffs(q, chctx->flcoeffs1, chctx->flcoeffs2, chctx->bandWidthT, chctx->flcoeffs3, chctx->flcoeffs5);
bitscount = 0;
/* first 4 bands will be assigned 5 bits per coefficient */
if (stream_format_code & 0x2) {
bitscount += 15;
- q->bitsBandT[0] = 5;
- q->CWlengthT[0] = 5;
- q->CWlengthT[1] = 5;
- q->CWlengthT[2] = 5;
- for(i = 1; i < 4; i++){
- bits = (q->levlCoeffBuf[i] == 16) ? 0 : 5;
- q->bitsBandT[i] = bits;
- for(j = band_tab[i]; j < band_tab[i+1]; j++) {
- q->CWlengthT[j] = bits;
- bitscount += bits;
+ chctx->bitsBandT[0] = 5;
+ chctx->CWlengthT[0] = 5;
+ chctx->CWlengthT[1] = 5;
+ chctx->CWlengthT[2] = 5;
+ for (i = 1; i < 4; i++) {
+ bits = (chctx->levlCoeffBuf[i] == 16) ? 0 : 5;
+ chctx->bitsBandT[i] = bits;
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
+ chctx->CWlengthT[j] = bits;
+ bitscount += bits;
}
}
}
+ if (avctx->codec_id == AV_CODEC_ID_IAC) {
+ bitscount += !!chctx->bandWidthT[BANDS - 1];
+ if (!(stream_format_code & 0x2))
+ bitscount += 16;
+ }
- if(bit_allocation (q, stream_format_code, 512 - bitscount - get_bits_count(&q->gb), flag) < 0) {
+ if ((ret = bit_allocation(q, chctx, stream_format_code,
+ 512 - bitscount - get_bits_count(&q->gb),
+ flag)) < 0) {
av_log(avctx, AV_LOG_ERROR, "Bit allocations failed\n");
- q->decoder_reset = 1;
- return -1;
+ chctx->decoder_reset = 1;
+ return ret;
}
- for(i = 0; i < BANDS; i++) {
- q->sumLenArr[i] = 0;
- q->skipFlagRaw[i] = 0;
- for(j = band_tab[i]; j < band_tab[i+1]; j++)
- q->sumLenArr[i] += q->CWlengthT[j];
- if (q->bandFlagsBuf[i])
- if( (((band_tab[i+1] - band_tab[i]) * 1.5) > q->sumLenArr[i]) && (q->sumLenArr[i] > 0))
- q->skipFlagRaw[i] = 1;
+ for (i = 0; i < BANDS; i++) {
+ chctx->sumLenArr[i] = 0;
+ chctx->skipFlagRaw[i] = 0;
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++)
+ chctx->sumLenArr[i] += chctx->CWlengthT[j];
+ if (chctx->bandFlagsBuf[i])
+ if ((((band_tab[i + 1] - band_tab[i]) * 1.5) > chctx->sumLenArr[i]) && (chctx->sumLenArr[i] > 0))
+ chctx->skipFlagRaw[i] = 1;
}
- imc_get_skip_coeff(q);
+ imc_get_skip_coeff(q, chctx);
- for(i = 0; i < BANDS; i++) {
- q->flcoeffs6[i] = q->flcoeffs1[i];
+ for (i = 0; i < BANDS; i++) {
+ chctx->flcoeffs6[i] = chctx->flcoeffs1[i];
/* band has flag set and at least one coded coefficient */
- if (q->bandFlagsBuf[i] && (band_tab[i+1] - band_tab[i]) != q->skipFlagCount[i]){
- q->flcoeffs6[i] *= q->sqrt_tab[band_tab[i+1] - band_tab[i]] /
- q->sqrt_tab[(band_tab[i+1] - band_tab[i] - q->skipFlagCount[i])];
+ if (chctx->bandFlagsBuf[i] && (band_tab[i + 1] - band_tab[i]) != chctx->skipFlagCount[i]) {
+ chctx->flcoeffs6[i] *= q->sqrt_tab[ band_tab[i + 1] - band_tab[i]] /
+ q->sqrt_tab[(band_tab[i + 1] - band_tab[i] - chctx->skipFlagCount[i])];
}
}
/* calculate bits left, bits needed and adjust bit allocation */
bits = summer = 0;
- for(i = 0; i < BANDS; i++) {
- if (q->bandFlagsBuf[i]) {
- for(j = band_tab[i]; j < band_tab[i+1]; j++) {
- if(q->skipFlags[j]) {
- summer += q->CWlengthT[j];
- q->CWlengthT[j] = 0;
+ for (i = 0; i < BANDS; i++) {
+ if (chctx->bandFlagsBuf[i]) {
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
+ if (chctx->skipFlags[j]) {
+ summer += chctx->CWlengthT[j];
+ chctx->CWlengthT[j] = 0;
}
}
- bits += q->skipFlagBits[i];
- summer -= q->skipFlagBits[i];
+ bits += chctx->skipFlagBits[i];
+ summer -= chctx->skipFlagBits[i];
}
}
- imc_adjust_bit_allocation(q, summer);
+ imc_adjust_bit_allocation(q, chctx, summer);
- for(i = 0; i < BANDS; i++) {
- q->sumLenArr[i] = 0;
+ for (i = 0; i < BANDS; i++) {
+ chctx->sumLenArr[i] = 0;
- for(j = band_tab[i]; j < band_tab[i+1]; j++)
- if (!q->skipFlags[j])
- q->sumLenArr[i] += q->CWlengthT[j];
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++)
+ if (!chctx->skipFlags[j])
+ chctx->sumLenArr[i] += chctx->CWlengthT[j];
}
- memset(q->codewords, 0, sizeof(q->codewords));
+ memset(chctx->codewords, 0, sizeof(chctx->codewords));
- if(imc_get_coeffs(q) < 0) {
+ if (imc_get_coeffs(q, chctx) < 0) {
av_log(avctx, AV_LOG_ERROR, "Read coefficients failed\n");
- q->decoder_reset = 1;
- return 0;
+ chctx->decoder_reset = 1;
+ return AVERROR_INVALIDDATA;
}
- if(inverse_quant_coeff(q, stream_format_code) < 0) {
+ if (inverse_quant_coeff(q, chctx, stream_format_code) < 0) {
av_log(avctx, AV_LOG_ERROR, "Inverse quantization of coefficients failed\n");
- q->decoder_reset = 1;
- return 0;
+ chctx->decoder_reset = 1;
+ return AVERROR_INVALIDDATA;
}
- memset(q->skipFlags, 0, sizeof(q->skipFlags));
+ memset(chctx->skipFlags, 0, sizeof(chctx->skipFlags));
+
+ imc_imdct256(q, chctx, avctx->channels);
+
+ return 0;
+}
+
+static int imc_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt)
+{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ int ret, i;
- imc_imdct256(q);
+ IMCContext *q = avctx->priv_data;
- q->dsp.float_to_int16(data, q->out_samples, COEFFS);
+ LOCAL_ALIGNED_16(uint16_t, buf16, [IMC_BLOCK_SIZE / 2]);
- *data_size = COEFFS * sizeof(int16_t);
+ if (buf_size < IMC_BLOCK_SIZE * avctx->channels) {
+ av_log(avctx, AV_LOG_ERROR, "frame too small!\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ /* get output buffer */
+ q->frame.nb_samples = COEFFS;
+ if ((ret = avctx->get_buffer(avctx, &q->frame)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
- return avctx->block_align;
+ for (i = 0; i < avctx->channels; i++) {
+ q->out_samples = (float *)q->frame.extended_data[i];
+
+ q->dsp.bswap16_buf(buf16, (const uint16_t*)buf, IMC_BLOCK_SIZE / 2);
+
+ init_get_bits(&q->gb, (const uint8_t*)buf16, IMC_BLOCK_SIZE * 8);
+
+ buf += IMC_BLOCK_SIZE;
+
+ if ((ret = imc_decode_block(avctx, q, i)) < 0)
+ return ret;
+ }
+
+ if (avctx->channels == 2) {
+ q->dsp.butterflies_float((float *)q->frame.extended_data[0],
+ (float *)q->frame.extended_data[1], COEFFS);
+ }
+
+ *got_frame_ptr = 1;
+ *(AVFrame *)data = q->frame;
+
+ return IMC_BLOCK_SIZE * avctx->channels;
}
-static int imc_decode_close(AVCodecContext * avctx)
+static av_cold int imc_decode_close(AVCodecContext * avctx)
{
IMCContext *q = avctx->priv_data;
ff_fft_end(&q->fft);
+
return 0;
}
-AVCodec imc_decoder = {
- .name = "imc",
- .type = CODEC_TYPE_AUDIO,
- .id = CODEC_ID_IMC,
+AVCodec ff_imc_decoder = {
+ .name = "imc",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_IMC,
+ .priv_data_size = sizeof(IMCContext),
+ .init = imc_decode_init,
+ .close = imc_decode_close,
+ .decode = imc_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("IMC (Intel Music Coder)"),
+ .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
+ AV_SAMPLE_FMT_NONE },
+};
+
+AVCodec ff_iac_decoder = {
+ .name = "iac",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_IAC,
.priv_data_size = sizeof(IMCContext),
- .init = imc_decode_init,
- .close = imc_decode_close,
- .decode = imc_decode_frame,
+ .init = imc_decode_init,
+ .close = imc_decode_close,
+ .decode = imc_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("IAC (Indeo Audio Coder)"),
+ .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
+ AV_SAMPLE_FMT_NONE },
};
projects / ffmpeg / blobdiff