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author | Michael Niedermayer <michaelni@gmx.at> | 2012-05-25 20:48:50 +0200 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2012-05-25 21:06:14 +0200 |
commit | c0b47d1914a19abacdf1edf081cbf07485952920 (patch) | |
tree | 94b26fadd3ecf4352ff87bd807ea6124bc2f4c02 /libavcodec/imc.c | |
parent | e02e58fb1c108dd96ef5b61454a2ba8d2af895ea (diff) | |
parent | ed7bdd8647a3d0f534c2af0d244fc8744ff262a0 (diff) | |
download | ffmpeg-c0b47d1914a19abacdf1edf081cbf07485952920.tar.gz |
Merge remote-tracking branch 'qatar/master'n0.12-dev
* qatar/master:
movenc: Don't write the 'wave' atom or its child 'enda' for lpcm audio.
imc: some cosmetics
rtmp: Pass the proper return code in rtmp_handshake
rtmp: Check return codes of net IO operations
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/imc.c')
-rw-r--r-- | libavcodec/imc.c | 385 |
1 files changed, 204 insertions, 181 deletions
diff --git a/libavcodec/imc.c b/libavcodec/imc.c index 968475c611..4c158e6171 100644 --- a/libavcodec/imc.c +++ b/libavcodec/imc.c @@ -89,7 +89,7 @@ typedef struct { DSPContext dsp; FFTContext fft; - DECLARE_ALIGNED(32, FFTComplex, samples)[COEFFS/2]; + DECLARE_ALIGNED(32, FFTComplex, samples)[COEFFS / 2]; float *out_samples; } IMCContext; @@ -99,11 +99,12 @@ static VLC huffman_vlc[4][4]; 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}; + 4452, 5220, 5860, 6628, 7268, 7908, 8424, 8936, VLC_TABLES_SIZE +}; static VLC_TYPE vlc_tables[VLC_TABLES_SIZE][2]; -static av_cold int imc_decode_init(AVCodecContext * avctx) +static av_cold int imc_decode_init(AVCodecContext *avctx) { int i, j, ret; IMCContext *q = avctx->priv_data; @@ -116,27 +117,24 @@ static av_cold int imc_decode_init(AVCodecContext * avctx) q->decoder_reset = 1; - for(i = 0; i < BANDS; i++) + for (i = 0; i < BANDS; i++) q->old_floor[i] = 1.0; /* Build mdct window, a simple sine window normalized with sqrt(2) */ ff_sine_window_init(q->mdct_sine_window, COEFFS); - for(i = 0; i < COEFFS; i++) + for (i = 0; i < COEFFS; i++) q->mdct_sine_window[i] *= sqrt(2.0); - for(i = 0; i < COEFFS/2; i++){ + 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); } @@ -146,13 +144,12 @@ static av_cold int imc_decode_init(AVCodecContext * avctx) /* 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++) { + 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], @@ -160,7 +157,7 @@ static av_cold int imc_decode_init(AVCodecContext * avctx) imc_huffman_bits[i][j], 2, 2, INIT_VLC_USE_NEW_STATIC); } } - q->one_div_log2 = 1/log(2); + q->one_div_log2 = 1 / log(2); if ((ret = ff_fft_init(&q->fft, 7, 1))) { av_log(avctx, AV_LOG_INFO, "FFT init failed\n"); @@ -176,8 +173,9 @@ static av_cold int imc_decode_init(AVCodecContext * avctx) 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]; @@ -186,13 +184,13 @@ static void imc_calculate_coeffs(IMCContext* q, float* flcoeffs1, float* flcoeff 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; @@ -200,37 +198,38 @@ static void imc_calculate_coeffs(IMCContext* q, float* flcoeffs1, float* flcoeff 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 < 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) * imc_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 > cyclTab2[i]; cnt2--) flcoeffs5[cnt2] += workT3[i]; workT2[cnt2+1] += workT3[i]; } accum = 0.0; - for(i = BANDS-2; i >= 0; i--) { + for (i = BANDS-2; i >= 0; i--) { accum = (workT2[i+1] + accum) * imc_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]; @@ -245,41 +244,42 @@ static void imc_read_level_coeffs(IMCContext* q, int stream_format_code, int* le 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] * 0.18945); // 0.18945 = log2(10) * 0.05703125 - flcoeffs2[0] = log(flcoeffs1[0])/log(2); - tmp = flcoeffs1[0]; + flcoeffs2[0] = log(flcoeffs1[0]) / log(2); + 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 += 0.83048 * level; // 0.83048 = log2(10) * 0.25 @@ -290,17 +290,20 @@ static void imc_decode_level_coefficients(IMCContext* q, int* levlCoeffBuf, floa } -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) * 0.83048 + flcoeffs2[i]; // 0.83048 = log2(10) * 0.25 + flcoeffs2[i] = (levlCoeffBuf[i] - 7) * 0.83048 + flcoeffs2[i]; // 0.83048 = log2(10) * 0.25 } else { flcoeffs1[i] = old_floor[i]; } @@ -310,7 +313,9 @@ static void imc_decode_level_coefficients2(IMCContext* q, int* levlCoeffBuf, flo /** * 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, int stream_format_code, int freebits, + int flag) +{ int i, j; const float limit = -1.e20; float highest = 0.0; @@ -327,31 +332,30 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits, int flg; int found_indx = 0; - for(i = 0; i < BANDS; i++) + for (i = 0; i < BANDS; i++) highest = FFMAX(highest, q->flcoeffs1[i]); - for(i = 0; i < BANDS-1; i++) { - q->flcoeffs4[i] = q->flcoeffs3[i] - log(q->flcoeffs5[i])/log(2); - } + for (i = 0; i < BANDS - 1; i++) + q->flcoeffs4[i] = q->flcoeffs3[i] - log(q->flcoeffs5[i]) / log(2); q->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]) == q->bandWidthT[i]) indx = 0; - if ((band_tab[i+1] - band_tab[i]) > q->bandWidthT[i]) + if ((band_tab[i + 1] - band_tab[i]) > q->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) >= q->bandWidthT[i]) indx = 2; if (indx == -1) return AVERROR_INVALIDDATA; - q->flcoeffs4[i] = q->flcoeffs4[i] + xTab[(indx*2 + (q->flcoeffs1[i] < highest)) * 2 + flag]; + q->flcoeffs4[i] += xTab[(indx * 2 + (q->flcoeffs1[i] < highest)) * 2 + flag]; } if (stream_format_code & 0x2) { @@ -361,22 +365,23 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits, q->flcoeffs4[3] = limit; } - for(i = (stream_format_code & 0x2)?4:0; i < BANDS-1; i++) { - iacc += q->bandWidthT[i]; + for (i = (stream_format_code & 0x2) ? 4 : 0; i < BANDS - 1; i++) { + iacc += q->bandWidthT[i]; summa += q->bandWidthT[i] * q->flcoeffs4[i]; } - q->bandWidthT[BANDS-1] = 0; + q->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++) { + for (j = (stream_format_code & 0x2) ? 4 : 0; j < BANDS; j++) { cwlen = av_clipf(((q->flcoeffs4[j] * 0.5) - summa + 0.5), 0, 6); q->bitsBandT[j] = cwlen; @@ -392,32 +397,33 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits, 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++) + 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]; } 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] = (q->bitsBandT[i] == 6) ? -1.e20 + : (q->bitsBandT[i] * -2 + q->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; @@ -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; |