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https://github.com/FFmpeg/FFmpeg.git
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imc: some cosmetics
This commit is contained in:
Kostya Shishkov
parent
177bcc9593
commit
d073f122ea
385
libavcodec/imc.c
385
libavcodec/imc.c
@ -89,7 +89,7 @@ typedef struct {
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DSPContext dsp;
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FFTContext fft;
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DECLARE_ALIGNED(32, FFTComplex, samples)[COEFFS/2];
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DECLARE_ALIGNED(32, FFTComplex, samples)[COEFFS / 2];
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float *out_samples;
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} IMCContext;
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@ -99,11 +99,12 @@ static VLC huffman_vlc[4][4];
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static const int vlc_offsets[17] = {
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0, 640, 1156, 1732, 2308, 2852, 3396, 3924,
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4452, 5220, 5860, 6628, 7268, 7908, 8424, 8936, VLC_TABLES_SIZE};
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4452, 5220, 5860, 6628, 7268, 7908, 8424, 8936, VLC_TABLES_SIZE
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};
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static VLC_TYPE vlc_tables[VLC_TABLES_SIZE][2];
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static av_cold int imc_decode_init(AVCodecContext * avctx)
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static av_cold int imc_decode_init(AVCodecContext *avctx)
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{
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int i, j, ret;
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IMCContext *q = avctx->priv_data;
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@ -116,27 +117,24 @@ static av_cold int imc_decode_init(AVCodecContext * avctx)
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q->decoder_reset = 1;
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for(i = 0; i < BANDS; i++)
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for (i = 0; i < BANDS; i++)
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q->old_floor[i] = 1.0;
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/* Build mdct window, a simple sine window normalized with sqrt(2) */
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ff_sine_window_init(q->mdct_sine_window, COEFFS);
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for(i = 0; i < COEFFS; i++)
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for (i = 0; i < COEFFS; i++)
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q->mdct_sine_window[i] *= sqrt(2.0);
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for(i = 0; i < COEFFS/2; i++){
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for (i = 0; i < COEFFS / 2; i++) {
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q->post_cos[i] = (1.0f / 32768) * cos(i / 256.0 * M_PI);
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q->post_sin[i] = (1.0f / 32768) * sin(i / 256.0 * M_PI);
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r1 = sin((i * 4.0 + 1.0) / 1024.0 * M_PI);
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r2 = cos((i * 4.0 + 1.0) / 1024.0 * M_PI);
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if (i & 0x1)
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{
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if (i & 0x1) {
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q->pre_coef1[i] = (r1 + r2) * sqrt(2.0);
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q->pre_coef2[i] = -(r1 - r2) * sqrt(2.0);
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}
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else
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{
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} else {
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q->pre_coef1[i] = -(r1 + r2) * sqrt(2.0);
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q->pre_coef2[i] = (r1 - r2) * sqrt(2.0);
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}
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@ -146,13 +144,12 @@ static av_cold int imc_decode_init(AVCodecContext * avctx)
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/* Generate a square root table */
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for(i = 0; i < 30; i++) {
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for (i = 0; i < 30; i++)
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q->sqrt_tab[i] = sqrt(i);
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}
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/* initialize the VLC tables */
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for(i = 0; i < 4 ; i++) {
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for(j = 0; j < 4; j++) {
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for (i = 0; i < 4 ; i++) {
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for (j = 0; j < 4; j++) {
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huffman_vlc[i][j].table = &vlc_tables[vlc_offsets[i * 4 + j]];
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huffman_vlc[i][j].table_allocated = vlc_offsets[i * 4 + j + 1] - vlc_offsets[i * 4 + j];
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init_vlc(&huffman_vlc[i][j], 9, imc_huffman_sizes[i],
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@ -160,7 +157,7 @@ static av_cold int imc_decode_init(AVCodecContext * avctx)
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imc_huffman_bits[i][j], 2, 2, INIT_VLC_USE_NEW_STATIC);
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}
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}
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q->one_div_log2 = 1/log(2);
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q->one_div_log2 = 1 / log(2);
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if ((ret = ff_fft_init(&q->fft, 7, 1))) {
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av_log(avctx, AV_LOG_INFO, "FFT init failed\n");
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@ -176,8 +173,9 @@ static av_cold int imc_decode_init(AVCodecContext * avctx)
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return 0;
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}
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static void imc_calculate_coeffs(IMCContext* q, float* flcoeffs1, float* flcoeffs2, int* bandWidthT,
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float* flcoeffs3, float* flcoeffs5)
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static void imc_calculate_coeffs(IMCContext *q, float *flcoeffs1,
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float *flcoeffs2, int *bandWidthT,
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float *flcoeffs3, float *flcoeffs5)
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{
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float workT1[BANDS];
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float workT2[BANDS];
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@ -186,13 +184,13 @@ static void imc_calculate_coeffs(IMCContext* q, float* flcoeffs1, float* flcoeff
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float accum = 0.0;
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int i, cnt2;
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for(i = 0; i < BANDS; i++) {
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for (i = 0; i < BANDS; i++) {
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flcoeffs5[i] = workT2[i] = 0.0;
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if (bandWidthT[i]){
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if (bandWidthT[i]) {
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workT1[i] = flcoeffs1[i] * flcoeffs1[i];
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flcoeffs3[i] = 2.0 * flcoeffs2[i];
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} else {
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workT1[i] = 0.0;
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workT1[i] = 0.0;
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flcoeffs3[i] = -30000.0;
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}
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workT3[i] = bandWidthT[i] * workT1[i] * 0.01;
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@ -200,37 +198,38 @@ static void imc_calculate_coeffs(IMCContext* q, float* flcoeffs1, float* flcoeff
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workT3[i] = 0.0;
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}
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for(i = 0; i < BANDS; i++) {
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for(cnt2 = i; cnt2 < cyclTab[i]; cnt2++)
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for (i = 0; i < BANDS; i++) {
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for (cnt2 = i; cnt2 < cyclTab[i]; cnt2++)
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flcoeffs5[cnt2] = flcoeffs5[cnt2] + workT3[i];
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workT2[cnt2-1] = workT2[cnt2-1] + workT3[i];
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workT2[cnt2 - 1] = workT2[cnt2 - 1] + workT3[i];
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}
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for(i = 1; i < BANDS; i++) {
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accum = (workT2[i-1] + accum) * imc_weights1[i-1];
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for (i = 1; i < BANDS; i++) {
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accum = (workT2[i - 1] + accum) * imc_weights1[i - 1];
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flcoeffs5[i] += accum;
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}
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for(i = 0; i < BANDS; i++)
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for (i = 0; i < BANDS; i++)
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workT2[i] = 0.0;
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for(i = 0; i < BANDS; i++) {
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for(cnt2 = i-1; cnt2 > cyclTab2[i]; cnt2--)
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for (i = 0; i < BANDS; i++) {
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for (cnt2 = i - 1; cnt2 > cyclTab2[i]; cnt2--)
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flcoeffs5[cnt2] += workT3[i];
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workT2[cnt2+1] += workT3[i];
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}
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accum = 0.0;
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for(i = BANDS-2; i >= 0; i--) {
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for (i = BANDS-2; i >= 0; i--) {
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accum = (workT2[i+1] + accum) * imc_weights2[i];
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flcoeffs5[i] += accum;
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//there is missing code here, but it seems to never be triggered
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// there is missing code here, but it seems to never be triggered
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}
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}
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static void imc_read_level_coeffs(IMCContext* q, int stream_format_code, int* levlCoeffs)
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static void imc_read_level_coeffs(IMCContext *q, int stream_format_code,
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int *levlCoeffs)
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{
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int i;
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VLC *hufftab[4];
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@ -245,41 +244,42 @@ static void imc_read_level_coeffs(IMCContext* q, int stream_format_code, int* le
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hufftab[3] = &huffman_vlc[s][3];
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cb_sel = imc_cb_select[s];
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if(stream_format_code & 4)
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if (stream_format_code & 4)
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start = 1;
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if(start)
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if (start)
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levlCoeffs[0] = get_bits(&q->gb, 7);
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for(i = start; i < BANDS; i++){
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levlCoeffs[i] = get_vlc2(&q->gb, hufftab[cb_sel[i]]->table, hufftab[cb_sel[i]]->bits, 2);
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if(levlCoeffs[i] == 17)
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for (i = start; i < BANDS; i++) {
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levlCoeffs[i] = get_vlc2(&q->gb, hufftab[cb_sel[i]]->table,
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hufftab[cb_sel[i]]->bits, 2);
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if (levlCoeffs[i] == 17)
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levlCoeffs[i] += get_bits(&q->gb, 4);
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}
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}
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static void imc_decode_level_coefficients(IMCContext* q, int* levlCoeffBuf, float* flcoeffs1,
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float* flcoeffs2)
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static void imc_decode_level_coefficients(IMCContext *q, int *levlCoeffBuf,
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float *flcoeffs1, float *flcoeffs2)
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{
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int i, level;
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float tmp, tmp2;
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//maybe some frequency division thingy
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// maybe some frequency division thingy
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flcoeffs1[0] = 20000.0 / pow (2, levlCoeffBuf[0] * 0.18945); // 0.18945 = log2(10) * 0.05703125
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flcoeffs2[0] = log(flcoeffs1[0])/log(2);
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tmp = flcoeffs1[0];
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flcoeffs2[0] = log(flcoeffs1[0]) / log(2);
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tmp = flcoeffs1[0];
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tmp2 = flcoeffs2[0];
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for(i = 1; i < BANDS; i++) {
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for (i = 1; i < BANDS; i++) {
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level = levlCoeffBuf[i];
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if (level == 16) {
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flcoeffs1[i] = 1.0;
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flcoeffs2[i] = 0.0;
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} else {
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if (level < 17)
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level -=7;
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level -= 7;
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else if (level <= 24)
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level -=32;
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level -= 32;
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else
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level -=16;
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level -= 16;
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tmp *= imc_exp_tab[15 + level];
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tmp2 += 0.83048 * level; // 0.83048 = log2(10) * 0.25
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@ -290,17 +290,20 @@ static void imc_decode_level_coefficients(IMCContext* q, int* levlCoeffBuf, floa
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}
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static void imc_decode_level_coefficients2(IMCContext* q, int* levlCoeffBuf, float* old_floor, float* flcoeffs1,
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float* flcoeffs2) {
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static void imc_decode_level_coefficients2(IMCContext *q, int *levlCoeffBuf,
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float *old_floor, float *flcoeffs1,
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float *flcoeffs2)
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{
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int i;
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//FIXME maybe flag_buf = noise coding and flcoeffs1 = new scale factors
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// and flcoeffs2 old scale factors
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// might be incomplete due to a missing table that is in the binary code
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for(i = 0; i < BANDS; i++) {
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/* FIXME maybe flag_buf = noise coding and flcoeffs1 = new scale factors
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* and flcoeffs2 old scale factors
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* might be incomplete due to a missing table that is in the binary code
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*/
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for (i = 0; i < BANDS; i++) {
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flcoeffs1[i] = 0;
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if(levlCoeffBuf[i] < 16) {
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if (levlCoeffBuf[i] < 16) {
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flcoeffs1[i] = imc_exp_tab2[levlCoeffBuf[i]] * old_floor[i];
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flcoeffs2[i] = (levlCoeffBuf[i]-7) * 0.83048 + flcoeffs2[i]; // 0.83048 = log2(10) * 0.25
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flcoeffs2[i] = (levlCoeffBuf[i] - 7) * 0.83048 + flcoeffs2[i]; // 0.83048 = log2(10) * 0.25
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} else {
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flcoeffs1[i] = old_floor[i];
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}
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@ -310,7 +313,9 @@ static void imc_decode_level_coefficients2(IMCContext* q, int* levlCoeffBuf, flo
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/**
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* Perform bit allocation depending on bits available
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*/
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static int bit_allocation (IMCContext* q, int stream_format_code, int freebits, int flag) {
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static int bit_allocation(IMCContext *q, int stream_format_code, int freebits,
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int flag)
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{
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int i, j;
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const float limit = -1.e20;
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float highest = 0.0;
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@ -327,31 +332,30 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits,
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int flg;
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int found_indx = 0;
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for(i = 0; i < BANDS; i++)
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for (i = 0; i < BANDS; i++)
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highest = FFMAX(highest, q->flcoeffs1[i]);
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for(i = 0; i < BANDS-1; i++) {
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q->flcoeffs4[i] = q->flcoeffs3[i] - log(q->flcoeffs5[i])/log(2);
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}
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for (i = 0; i < BANDS - 1; i++)
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q->flcoeffs4[i] = q->flcoeffs3[i] - log(q->flcoeffs5[i]) / log(2);
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q->flcoeffs4[BANDS - 1] = limit;
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highest = highest * 0.25;
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for(i = 0; i < BANDS; i++) {
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for (i = 0; i < BANDS; i++) {
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indx = -1;
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if ((band_tab[i+1] - band_tab[i]) == q->bandWidthT[i])
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if ((band_tab[i + 1] - band_tab[i]) == q->bandWidthT[i])
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indx = 0;
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if ((band_tab[i+1] - band_tab[i]) > q->bandWidthT[i])
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if ((band_tab[i + 1] - band_tab[i]) > q->bandWidthT[i])
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indx = 1;
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if (((band_tab[i+1] - band_tab[i])/2) >= q->bandWidthT[i])
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if (((band_tab[i + 1] - band_tab[i]) / 2) >= q->bandWidthT[i])
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indx = 2;
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if (indx == -1)
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return AVERROR_INVALIDDATA;
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q->flcoeffs4[i] = q->flcoeffs4[i] + xTab[(indx*2 + (q->flcoeffs1[i] < highest)) * 2 + flag];
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q->flcoeffs4[i] += xTab[(indx * 2 + (q->flcoeffs1[i] < highest)) * 2 + flag];
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}
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if (stream_format_code & 0x2) {
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@ -361,22 +365,23 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits,
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q->flcoeffs4[3] = limit;
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}
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for(i = (stream_format_code & 0x2)?4:0; i < BANDS-1; i++) {
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iacc += q->bandWidthT[i];
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for (i = (stream_format_code & 0x2) ? 4 : 0; i < BANDS - 1; i++) {
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iacc += q->bandWidthT[i];
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summa += q->bandWidthT[i] * q->flcoeffs4[i];
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}
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q->bandWidthT[BANDS-1] = 0;
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q->bandWidthT[BANDS - 1] = 0;
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summa = (summa * 0.5 - freebits) / iacc;
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for(i = 0; i < BANDS/2; i++) {
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for (i = 0; i < BANDS / 2; i++) {
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rres = summer - freebits;
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if((rres >= -8) && (rres <= 8)) break;
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if ((rres >= -8) && (rres <= 8))
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break;
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summer = 0;
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iacc = 0;
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iacc = 0;
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for(j = (stream_format_code & 0x2)?4:0; j < BANDS; j++) {
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for (j = (stream_format_code & 0x2) ? 4 : 0; j < BANDS; j++) {
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cwlen = av_clipf(((q->flcoeffs4[j] * 0.5) - summa + 0.5), 0, 6);
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q->bitsBandT[j] = cwlen;
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@ -392,32 +397,33 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits,
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t2 = -1;
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if (i == 0)
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flg = t2;
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if(flg != t2)
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if (flg != t2)
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t1++;
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summa = (float)(summer - freebits) / ((t1 + 1) * iacc) + summa;
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}
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for(i = (stream_format_code & 0x2)?4:0; i < BANDS; i++) {
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for(j = band_tab[i]; j < band_tab[i+1]; j++)
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for (i = (stream_format_code & 0x2) ? 4 : 0; i < BANDS; i++) {
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for (j = band_tab[i]; j < band_tab[i + 1]; j++)
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q->CWlengthT[j] = q->bitsBandT[i];
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}
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if (freebits > summer) {
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for(i = 0; i < BANDS; i++) {
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workT[i] = (q->bitsBandT[i] == 6) ? -1.e20 : (q->bitsBandT[i] * -2 + q->flcoeffs4[i] - 0.415);
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for (i = 0; i < BANDS; i++) {
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workT[i] = (q->bitsBandT[i] == 6) ? -1.e20
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: (q->bitsBandT[i] * -2 + q->flcoeffs4[i] - 0.415);
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}
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highest = 0.0;
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do{
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do {
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if (highest <= -1.e20)
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break;
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found_indx = 0;
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highest = -1.e20;
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for(i = 0; i < BANDS; i++) {
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for (i = 0; i < BANDS; i++) {
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if (workT[i] > highest) {
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highest = workT[i];
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found_indx = i;
|
||||
@ -426,19 +432,20 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits,
|
||||
|
||||
if (highest > -1.e20) {
|
||||
workT[found_indx] -= 2.0;
|
||||
if (++(q->bitsBandT[found_indx]) == 6)
|
||||
if (++q->bitsBandT[found_indx] == 6)
|
||||
workT[found_indx] = -1.e20;
|
||||
|
||||
for(j = band_tab[found_indx]; j < band_tab[found_indx+1] && (freebits > summer); j++){
|
||||
for (j = band_tab[found_indx]; j < band_tab[found_indx + 1] && (freebits > summer); j++) {
|
||||
q->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] = q->bitsBandT[i] ? (q->bitsBandT[i] * -2 + q->flcoeffs4[i] + 1.585)
|
||||
: 1.e20;
|
||||
}
|
||||
if (stream_format_code & 0x2) {
|
||||
workT[0] = 1.e20;
|
||||
@ -446,23 +453,24 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits,
|
||||
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 (!--q->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){
|
||||
for (j = band_tab[low_indx]; j < band_tab[low_indx+1] && (freebits < summer); j++) {
|
||||
if (q->CWlengthT[j] > 0) {
|
||||
q->CWlengthT[j]--;
|
||||
summer--;
|
||||
}
|
||||
@ -472,49 +480,51 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits,
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void imc_get_skip_coeff(IMCContext* q) {
|
||||
static void imc_get_skip_coeff(IMCContext *q)
|
||||
{
|
||||
int i, j;
|
||||
|
||||
memset(q->skipFlagBits, 0, sizeof(q->skipFlagBits));
|
||||
memset(q->skipFlagBits, 0, sizeof(q->skipFlagBits));
|
||||
memset(q->skipFlagCount, 0, sizeof(q->skipFlagCount));
|
||||
for(i = 0; i < BANDS; i++) {
|
||||
for (i = 0; i < BANDS; i++) {
|
||||
if (!q->bandFlagsBuf[i] || !q->bandWidthT[i])
|
||||
continue;
|
||||
|
||||
if (!q->skipFlagRaw[i]) {
|
||||
q->skipFlagBits[i] = band_tab[i+1] - band_tab[i];
|
||||
q->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_bits1(&q->gb)))
|
||||
for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
|
||||
q->skipFlags[j] = get_bits1(&q->gb);
|
||||
if (q->skipFlags[j])
|
||||
q->skipFlagCount[i]++;
|
||||
}
|
||||
} else {
|
||||
for(j = band_tab[i]; j < (band_tab[i+1]-1); j += 2) {
|
||||
if(!get_bits1(&q->gb)){//0
|
||||
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->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;
|
||||
} 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;
|
||||
} 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;
|
||||
} else { // 101
|
||||
q->skipFlags[j] = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (j < band_tab[i+1]) {
|
||||
if (j < band_tab[i + 1]) {
|
||||
q->skipFlagBits[i]++;
|
||||
if ((q->skipFlags[j] = get_bits1(&q->gb)))
|
||||
q->skipFlagCount[i]++;
|
||||
@ -526,24 +536,26 @@ static void imc_get_skip_coeff(IMCContext* q) {
|
||||
/**
|
||||
* 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, 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] = (q->bitsBandT[i] == 6) ? -1.e20
|
||||
: (q->bitsBandT[i] * -2 + q->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;
|
||||
@ -555,7 +567,7 @@ static void imc_adjust_bit_allocation (IMCContext* q, int summer) {
|
||||
if (++(q->bitsBandT[found_indx]) == 6)
|
||||
workT[found_indx] = -1.e20;
|
||||
|
||||
for(j = band_tab[found_indx]; j < band_tab[found_indx+1] && (corrected < summer); j++) {
|
||||
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]++;
|
||||
corrected++;
|
||||
@ -565,61 +577,65 @@ static void imc_adjust_bit_allocation (IMCContext* q, int summer) {
|
||||
}
|
||||
}
|
||||
|
||||
static void imc_imdct256(IMCContext *q) {
|
||||
static void imc_imdct256(IMCContext *q)
|
||||
{
|
||||
int i;
|
||||
float re, im;
|
||||
|
||||
/* 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] * 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]);
|
||||
}
|
||||
|
||||
/* FFT */
|
||||
q->fft.fft_permute(&q->fft, q->samples);
|
||||
q->fft.fft_calc (&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);
|
||||
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;
|
||||
}
|
||||
}
|
||||
|
||||
static int inverse_quant_coeff (IMCContext* q, int stream_format_code) {
|
||||
static int inverse_quant_coeff(IMCContext *q, 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++) {
|
||||
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];
|
||||
|
||||
if (cw_len <= 0 || q->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 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];
|
||||
q->CWdecoded[j] = quantizer[q->codewords[j] - 8] * q->flcoeffs6[i];
|
||||
else
|
||||
q->CWdecoded[j] = -quantizer[max_size - q->codewords[j] - 8 - 1] * q->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];
|
||||
q->CWdecoded[j] = quantizer[q->codewords[j] - 1] * q->flcoeffs6[i];
|
||||
else
|
||||
q->CWdecoded[j] = -quantizer[max_size - 2 - q->codewords[j]] * q->flcoeffs6[i];
|
||||
}
|
||||
@ -629,22 +645,24 @@ static int inverse_quant_coeff (IMCContext* q, int stream_format_code) {
|
||||
}
|
||||
|
||||
|
||||
static int imc_get_coeffs (IMCContext* q) {
|
||||
static int imc_get_coeffs(IMCContext *q)
|
||||
{
|
||||
int i, j, cw_len, cw;
|
||||
|
||||
for(i = 0; i < BANDS; i++) {
|
||||
if(!q->sumLenArr[i]) continue;
|
||||
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++) {
|
||||
for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
|
||||
cw_len = q->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);
|
||||
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 AVERROR_INVALIDDATA;
|
||||
}
|
||||
|
||||
if(cw_len && (!q->bandFlagsBuf[i] || !q->skipFlags[j]))
|
||||
if (cw_len && (!q->bandFlagsBuf[i] || !q->skipFlags[j]))
|
||||
cw = get_bits(&q->gb, cw_len);
|
||||
|
||||
q->codewords[j] = cw;
|
||||
@ -654,7 +672,7 @@ static int imc_get_coeffs (IMCContext* q) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int imc_decode_frame(AVCodecContext * avctx, void *data,
|
||||
static int imc_decode_frame(AVCodecContext *avctx, void *data,
|
||||
int *got_frame_ptr, AVPacket *avpkt)
|
||||
{
|
||||
const uint8_t *buf = avpkt->data;
|
||||
@ -680,7 +698,7 @@ static int imc_decode_frame(AVCodecContext * avctx, void *data,
|
||||
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
||||
return ret;
|
||||
}
|
||||
q->out_samples = (float *)q->frame.data[0];
|
||||
q->out_samples = (float*)q->frame.data[0];
|
||||
|
||||
q->dsp.bswap16_buf(buf16, (const uint16_t*)buf, IMC_BLOCK_SIZE / 2);
|
||||
|
||||
@ -695,7 +713,7 @@ static int imc_decode_frame(AVCodecContext * avctx, void *data,
|
||||
}
|
||||
stream_format_code = get_bits(&q->gb, 3);
|
||||
|
||||
if(stream_format_code & 1){
|
||||
if (stream_format_code & 1) {
|
||||
av_log(avctx, AV_LOG_ERROR, "Stream code format %X is not supported\n", stream_format_code);
|
||||
return AVERROR_INVALIDDATA;
|
||||
}
|
||||
@ -705,10 +723,12 @@ static int imc_decode_frame(AVCodecContext * avctx, void *data,
|
||||
if (stream_format_code & 0x04)
|
||||
q->decoder_reset = 1;
|
||||
|
||||
if(q->decoder_reset) {
|
||||
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;
|
||||
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;
|
||||
}
|
||||
|
||||
@ -716,22 +736,24 @@ static int imc_decode_frame(AVCodecContext * avctx, void *data,
|
||||
imc_read_level_coeffs(q, stream_format_code, q->levlCoeffBuf);
|
||||
|
||||
if (stream_format_code & 0x4)
|
||||
imc_decode_level_coefficients(q, q->levlCoeffBuf, q->flcoeffs1, q->flcoeffs2);
|
||||
imc_decode_level_coefficients(q, q->levlCoeffBuf,
|
||||
q->flcoeffs1, q->flcoeffs2);
|
||||
else
|
||||
imc_decode_level_coefficients2(q, q->levlCoeffBuf, q->old_floor, q->flcoeffs1, q->flcoeffs2);
|
||||
imc_decode_level_coefficients2(q, q->levlCoeffBuf, q->old_floor,
|
||||
q->flcoeffs1, q->flcoeffs2);
|
||||
|
||||
memcpy(q->old_floor, q->flcoeffs1, 32 * sizeof(float));
|
||||
|
||||
counter = 0;
|
||||
for (i=0 ; i<BANDS ; i++) {
|
||||
for (i = 0; i < BANDS; i++) {
|
||||
if (q->levlCoeffBuf[i] == 16) {
|
||||
q->bandWidthT[i] = 0;
|
||||
counter++;
|
||||
} else
|
||||
q->bandWidthT[i] = band_tab[i+1] - band_tab[i];
|
||||
q->bandWidthT[i] = band_tab[i + 1] - band_tab[i];
|
||||
}
|
||||
memset(q->bandFlagsBuf, 0, BANDS * sizeof(int));
|
||||
for(i = 0; i < BANDS-1; i++) {
|
||||
for (i = 0; i < BANDS - 1; i++) {
|
||||
if (q->bandWidthT[i])
|
||||
q->bandFlagsBuf[i] = get_bits1(&q->gb);
|
||||
}
|
||||
@ -747,78 +769,79 @@ static int imc_decode_frame(AVCodecContext * avctx, void *data,
|
||||
q->CWlengthT[0] = 5;
|
||||
q->CWlengthT[1] = 5;
|
||||
q->CWlengthT[2] = 5;
|
||||
for(i = 1; i < 4; i++){
|
||||
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++) {
|
||||
for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
|
||||
q->CWlengthT[j] = bits;
|
||||
bitscount += bits;
|
||||
bitscount += bits;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if((ret = bit_allocation (q, stream_format_code,
|
||||
512 - bitscount - get_bits_count(&q->gb), flag)) < 0) {
|
||||
if ((ret = bit_allocation(q, 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 ret;
|
||||
}
|
||||
|
||||
for(i = 0; i < BANDS; i++) {
|
||||
q->sumLenArr[i] = 0;
|
||||
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++)
|
||||
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))
|
||||
if ((((band_tab[i + 1] - band_tab[i]) * 1.5) > q->sumLenArr[i]) && (q->sumLenArr[i] > 0))
|
||||
q->skipFlagRaw[i] = 1;
|
||||
}
|
||||
|
||||
imc_get_skip_coeff(q);
|
||||
|
||||
for(i = 0; i < BANDS; i++) {
|
||||
for (i = 0; i < BANDS; i++) {
|
||||
q->flcoeffs6[i] = q->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 (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])];
|
||||
}
|
||||
}
|
||||
|
||||
/* calculate bits left, bits needed and adjust bit allocation */
|
||||
bits = summer = 0;
|
||||
|
||||
for(i = 0; i < BANDS; i++) {
|
||||
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]) {
|
||||
for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
|
||||
if (q->skipFlags[j]) {
|
||||
summer += q->CWlengthT[j];
|
||||
q->CWlengthT[j] = 0;
|
||||
}
|
||||
}
|
||||
bits += q->skipFlagBits[i];
|
||||
bits += q->skipFlagBits[i];
|
||||
summer -= q->skipFlagBits[i];
|
||||
}
|
||||
}
|
||||
imc_adjust_bit_allocation(q, summer);
|
||||
|
||||
for(i = 0; i < BANDS; i++) {
|
||||
for (i = 0; i < BANDS; i++) {
|
||||
q->sumLenArr[i] = 0;
|
||||
|
||||
for(j = band_tab[i]; j < band_tab[i+1]; j++)
|
||||
for (j = band_tab[i]; j < band_tab[i + 1]; j++)
|
||||
if (!q->skipFlags[j])
|
||||
q->sumLenArr[i] += q->CWlengthT[j];
|
||||
}
|
||||
|
||||
memset(q->codewords, 0, sizeof(q->codewords));
|
||||
|
||||
if(imc_get_coeffs(q) < 0) {
|
||||
if (imc_get_coeffs(q) < 0) {
|
||||
av_log(avctx, AV_LOG_ERROR, "Read coefficients failed\n");
|
||||
q->decoder_reset = 1;
|
||||
return AVERROR_INVALIDDATA;
|
||||
}
|
||||
|
||||
if(inverse_quant_coeff(q, stream_format_code) < 0) {
|
||||
if (inverse_quant_coeff(q, stream_format_code) < 0) {
|
||||
av_log(avctx, AV_LOG_ERROR, "Inverse quantization of coefficients failed\n");
|
||||
q->decoder_reset = 1;
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user