From 541d083a40a5edd78a7aec411bb2bbb918623672 Mon Sep 17 00:00:00 2001 From: Chris Berov Date: Fri, 2 Dec 2011 17:46:01 +0200 Subject: ac3dec: cosmetics: pretty-printing Signed-off-by: Justin Ruggles --- libavcodec/ac3dec.c | 509 +++++++++++++++++++++++++++------------------------- 1 file changed, 261 insertions(+), 248 deletions(-) (limited to 'libavcodec/ac3dec.c') diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c index 7e11cf49ce..83cfa0acc3 100644 --- a/libavcodec/ac3dec.c +++ b/libavcodec/ac3dec.c @@ -44,7 +44,6 @@ */ static uint8_t ungroup_3_in_7_bits_tab[128][3]; - /** tables for ungrouping mantissas */ static int b1_mantissas[32][3]; static int b2_mantissas[128][3]; @@ -124,7 +123,7 @@ static av_cold void ac3_tables_init(void) /* generate table for ungrouping 3 values in 7 bits reference: Section 7.1.3 Exponent Decoding */ - for(i=0; i<128; i++) { + for (i = 0; i < 128; i++) { ungroup_3_in_7_bits_tab[i][0] = i / 25; ungroup_3_in_7_bits_tab[i][1] = (i % 25) / 5; ungroup_3_in_7_bits_tab[i][2] = (i % 25) % 5; @@ -132,13 +131,13 @@ static av_cold void ac3_tables_init(void) /* generate grouped mantissa tables reference: Section 7.3.5 Ungrouping of Mantissas */ - for(i=0; i<32; i++) { + for (i = 0; i < 32; i++) { /* bap=1 mantissas */ b1_mantissas[i][0] = symmetric_dequant(ff_ac3_ungroup_3_in_5_bits_tab[i][0], 3); b1_mantissas[i][1] = symmetric_dequant(ff_ac3_ungroup_3_in_5_bits_tab[i][1], 3); b1_mantissas[i][2] = symmetric_dequant(ff_ac3_ungroup_3_in_5_bits_tab[i][2], 3); } - for(i=0; i<128; i++) { + for (i = 0; i < 128; i++) { /* bap=2 mantissas */ b2_mantissas[i][0] = symmetric_dequant(ungroup_3_in_7_bits_tab[i][0], 5); b2_mantissas[i][1] = symmetric_dequant(ungroup_3_in_7_bits_tab[i][1], 5); @@ -150,24 +149,23 @@ static av_cold void ac3_tables_init(void) } /* generate ungrouped mantissa tables reference: Tables 7.21 and 7.23 */ - for(i=0; i<7; i++) { + for (i = 0; i < 7; i++) { /* bap=3 mantissas */ b3_mantissas[i] = symmetric_dequant(i, 7); } - for(i=0; i<15; i++) { + for (i = 0; i < 15; i++) { /* bap=5 mantissas */ b5_mantissas[i] = symmetric_dequant(i, 15); } /* generate dynamic range table reference: Section 7.7.1 Dynamic Range Control */ - for(i=0; i<256; i++) { + for (i = 0; i < 256; i++) { int v = (i >> 5) - ((i >> 7) << 3) - 5; dynamic_range_tab[i] = powf(2.0f, v) * ((i & 0x1F) | 0x20); } } - /** * AVCodec initialization */ @@ -250,7 +248,7 @@ static int ac3_parse_header(AC3DecodeContext *s) i = get_bits(gbc, 6); do { skip_bits(gbc, 8); - } while(i--); + } while (i--); } return 0; @@ -265,7 +263,7 @@ static int parse_frame_header(AC3DecodeContext *s) int err; err = avpriv_ac3_parse_header(&s->gbc, &hdr); - if(err) + if (err) return err; /* get decoding parameters from header info */ @@ -287,9 +285,9 @@ static int parse_frame_header(AC3DecodeContext *s) s->frame_type = hdr.frame_type; s->substreamid = hdr.substreamid; - if(s->lfe_on) { - s->start_freq[s->lfe_ch] = 0; - s->end_freq[s->lfe_ch] = 7; + if (s->lfe_on) { + s->start_freq[s->lfe_ch] = 0; + s->end_freq[s->lfe_ch] = 7; s->num_exp_groups[s->lfe_ch] = 2; s->channel_in_cpl[s->lfe_ch] = 0; } @@ -326,38 +324,39 @@ static void set_downmix_coeffs(AC3DecodeContext *s) float smix = gain_levels[surround_levels[s->surround_mix_level]]; float norm0, norm1; - for(i=0; ifbw_channels; i++) { + for (i = 0; i < s->fbw_channels; i++) { s->downmix_coeffs[i][0] = gain_levels[ac3_default_coeffs[s->channel_mode][i][0]]; s->downmix_coeffs[i][1] = gain_levels[ac3_default_coeffs[s->channel_mode][i][1]]; } - if(s->channel_mode > 1 && s->channel_mode & 1) { + if (s->channel_mode > 1 && s->channel_mode & 1) { s->downmix_coeffs[1][0] = s->downmix_coeffs[1][1] = cmix; } - if(s->channel_mode == AC3_CHMODE_2F1R || s->channel_mode == AC3_CHMODE_3F1R) { + if (s->channel_mode == AC3_CHMODE_2F1R || s->channel_mode == AC3_CHMODE_3F1R) { int nf = s->channel_mode - 2; s->downmix_coeffs[nf][0] = s->downmix_coeffs[nf][1] = smix * LEVEL_MINUS_3DB; } - if(s->channel_mode == AC3_CHMODE_2F2R || s->channel_mode == AC3_CHMODE_3F2R) { + if (s->channel_mode == AC3_CHMODE_2F2R || s->channel_mode == AC3_CHMODE_3F2R) { int nf = s->channel_mode - 4; s->downmix_coeffs[nf][0] = s->downmix_coeffs[nf+1][1] = smix; } /* renormalize */ norm0 = norm1 = 0.0; - for(i=0; ifbw_channels; i++) { + for (i = 0; i < s->fbw_channels; i++) { norm0 += s->downmix_coeffs[i][0]; norm1 += s->downmix_coeffs[i][1]; } norm0 = 1.0f / norm0; norm1 = 1.0f / norm1; - for(i=0; ifbw_channels; i++) { + for (i = 0; i < s->fbw_channels; i++) { s->downmix_coeffs[i][0] *= norm0; s->downmix_coeffs[i][1] *= norm1; } - if(s->output_mode == AC3_CHMODE_MONO) { - for(i=0; ifbw_channels; i++) - s->downmix_coeffs[i][0] = (s->downmix_coeffs[i][0] + s->downmix_coeffs[i][1]) * LEVEL_MINUS_3DB; + if (s->output_mode == AC3_CHMODE_MONO) { + for (i = 0; i < s->fbw_channels; i++) + s->downmix_coeffs[i][0] = (s->downmix_coeffs[i][0] + + s->downmix_coeffs[i][1]) * LEVEL_MINUS_3DB; } } @@ -374,7 +373,7 @@ static int decode_exponents(GetBitContext *gbc, int exp_strategy, int ngrps, /* unpack groups */ group_size = exp_strategy + (exp_strategy == EXP_D45); - for(grp=0,i=0; grp 24U) return -1; switch (group_size) { - case 4: dexps[j++] = prevexp; - dexps[j++] = prevexp; - case 2: dexps[j++] = prevexp; - case 1: dexps[j++] = prevexp; + case 4: dexps[j++] = prevexp; + dexps[j++] = prevexp; + case 2: dexps[j++] = prevexp; + case 1: dexps[j++] = prevexp; } } return 0; @@ -414,7 +413,8 @@ static void calc_transform_coeffs_cpl(AC3DecodeContext *s) if (s->channel_in_cpl[ch]) { int cpl_coord = s->cpl_coords[ch][band] << 5; for (bin = band_start; bin < band_end; bin++) { - s->fixed_coeffs[ch][bin] = MULH(s->fixed_coeffs[CPL_CH][bin] << 4, cpl_coord); + s->fixed_coeffs[ch][bin] = + MULH(s->fixed_coeffs[CPL_CH][bin] << 4, cpl_coord); } if (ch == 2 && s->phase_flags[band]) { for (bin = band_start; bin < band_end; bin++) @@ -445,73 +445,70 @@ typedef struct { static void ac3_decode_transform_coeffs_ch(AC3DecodeContext *s, int ch_index, mant_groups *m) { int start_freq = s->start_freq[ch_index]; - int end_freq = s->end_freq[ch_index]; - uint8_t *baps = s->bap[ch_index]; - int8_t *exps = s->dexps[ch_index]; - int *coeffs = s->fixed_coeffs[ch_index]; - int dither = (ch_index == CPL_CH) || s->dither_flag[ch_index]; + int end_freq = s->end_freq[ch_index]; + uint8_t *baps = s->bap[ch_index]; + int8_t *exps = s->dexps[ch_index]; + int *coeffs = s->fixed_coeffs[ch_index]; + int dither = (ch_index == CPL_CH) || s->dither_flag[ch_index]; GetBitContext *gbc = &s->gbc; int freq; - for(freq = start_freq; freq < end_freq; freq++){ + for (freq = start_freq; freq < end_freq; freq++) { int bap = baps[freq]; int mantissa; - switch(bap){ - case 0: - if (dither) - mantissa = (av_lfg_get(&s->dith_state) & 0x7FFFFF) - 0x400000; - else - mantissa = 0; - break; - case 1: - if(m->b1){ - m->b1--; - mantissa = m->b1_mant[m->b1]; - } - else{ - int bits = get_bits(gbc, 5); - mantissa = b1_mantissas[bits][0]; - m->b1_mant[1] = b1_mantissas[bits][1]; - m->b1_mant[0] = b1_mantissas[bits][2]; - m->b1 = 2; - } - break; - case 2: - if(m->b2){ - m->b2--; - mantissa = m->b2_mant[m->b2]; - } - else{ - int bits = get_bits(gbc, 7); - mantissa = b2_mantissas[bits][0]; - m->b2_mant[1] = b2_mantissas[bits][1]; - m->b2_mant[0] = b2_mantissas[bits][2]; - m->b2 = 2; - } - break; - case 3: - mantissa = b3_mantissas[get_bits(gbc, 3)]; - break; - case 4: - if(m->b4){ - m->b4 = 0; - mantissa = m->b4_mant; - } - else{ - int bits = get_bits(gbc, 7); - mantissa = b4_mantissas[bits][0]; - m->b4_mant = b4_mantissas[bits][1]; - m->b4 = 1; - } - break; - case 5: - mantissa = b5_mantissas[get_bits(gbc, 4)]; - break; - default: /* 6 to 15 */ - /* Shift mantissa and sign-extend it. */ - mantissa = get_sbits(gbc, quantization_tab[bap]); - mantissa <<= 24 - quantization_tab[bap]; - break; + switch (bap) { + case 0: + if (dither) + mantissa = (av_lfg_get(&s->dith_state) & 0x7FFFFF) - 0x400000; + else + mantissa = 0; + break; + case 1: + if (m->b1) { + m->b1--; + mantissa = m->b1_mant[m->b1]; + } else { + int bits = get_bits(gbc, 5); + mantissa = b1_mantissas[bits][0]; + m->b1_mant[1] = b1_mantissas[bits][1]; + m->b1_mant[0] = b1_mantissas[bits][2]; + m->b1 = 2; + } + break; + case 2: + if (m->b2) { + m->b2--; + mantissa = m->b2_mant[m->b2]; + } else { + int bits = get_bits(gbc, 7); + mantissa = b2_mantissas[bits][0]; + m->b2_mant[1] = b2_mantissas[bits][1]; + m->b2_mant[0] = b2_mantissas[bits][2]; + m->b2 = 2; + } + break; + case 3: + mantissa = b3_mantissas[get_bits(gbc, 3)]; + break; + case 4: + if (m->b4) { + m->b4 = 0; + mantissa = m->b4_mant; + } else { + int bits = get_bits(gbc, 7); + mantissa = b4_mantissas[bits][0]; + m->b4_mant = b4_mantissas[bits][1]; + m->b4 = 1; + } + break; + case 5: + mantissa = b5_mantissas[get_bits(gbc, 4)]; + break; + default: /* 6 to 15 */ + /* Shift mantissa and sign-extend it. */ + mantissa = get_sbits(gbc, quantization_tab[bap]); + mantissa <<= 24 - quantization_tab[bap]; + break; } coeffs[freq] = mantissa >> exps[freq]; } @@ -525,10 +522,10 @@ static void ac3_decode_transform_coeffs_ch(AC3DecodeContext *s, int ch_index, ma static void remove_dithering(AC3DecodeContext *s) { int ch, i; - for(ch=1; ch<=s->fbw_channels; ch++) { - if(!s->dither_flag[ch] && s->channel_in_cpl[ch]) { - for(i = s->start_freq[CPL_CH]; iend_freq[CPL_CH]; i++) { - if(!s->bap[CPL_CH][i]) + for (ch = 1; ch <= s->fbw_channels; ch++) { + if (!s->dither_flag[ch] && s->channel_in_cpl[ch]) { + for (i = s->start_freq[CPL_CH]; i < s->end_freq[CPL_CH]; i++) { + if (!s->bap[CPL_CH][i]) s->fixed_coeffs[ch][i] = 0; } } @@ -536,7 +533,7 @@ static void remove_dithering(AC3DecodeContext *s) { } static void decode_transform_coeffs_ch(AC3DecodeContext *s, int blk, int ch, - mant_groups *m) + mant_groups *m) { if (!s->channel_uses_aht[ch]) { ac3_decode_transform_coeffs_ch(s, ch, m); @@ -580,7 +577,7 @@ static void decode_transform_coeffs(AC3DecodeContext *s, int blk) } do s->fixed_coeffs[ch][end] = 0; - while(++end < 256); + while (++end < 256); } /* zero the dithered coefficients for appropriate channels */ @@ -598,10 +595,10 @@ static void do_rematrixing(AC3DecodeContext *s) end = FFMIN(s->end_freq[1], s->end_freq[2]); - for(bnd=0; bndnum_rematrixing_bands; bnd++) { - if(s->rematrixing_flags[bnd]) { - bndend = FFMIN(end, ff_ac3_rematrix_band_tab[bnd+1]); - for(i=ff_ac3_rematrix_band_tab[bnd]; inum_rematrixing_bands; bnd++) { + if (s->rematrixing_flags[bnd]) { + bndend = FFMIN(end, ff_ac3_rematrix_band_tab[bnd + 1]); + for (i = ff_ac3_rematrix_band_tab[bnd]; i < bndend; i++) { int tmp0 = s->fixed_coeffs[1][i]; s->fixed_coeffs[1][i] += s->fixed_coeffs[2][i]; s->fixed_coeffs[2][i] = tmp0 - s->fixed_coeffs[2][i]; @@ -619,21 +616,23 @@ static inline void do_imdct(AC3DecodeContext *s, int channels) { int ch; - for (ch=1; ch<=channels; ch++) { + for (ch = 1; ch <= channels; ch++) { if (s->block_switch[ch]) { int i; - float *x = s->tmp_output+128; - for(i=0; i<128; i++) - x[i] = s->transform_coeffs[ch][2*i]; + float *x = s->tmp_output + 128; + for (i = 0; i < 128; i++) + x[i] = s->transform_coeffs[ch][2 * i]; s->imdct_256.imdct_half(&s->imdct_256, s->tmp_output, x); - s->dsp.vector_fmul_window(s->output[ch-1], s->delay[ch-1], s->tmp_output, s->window, 128); - for(i=0; i<128; i++) - x[i] = s->transform_coeffs[ch][2*i+1]; - s->imdct_256.imdct_half(&s->imdct_256, s->delay[ch-1], x); + s->dsp.vector_fmul_window(s->output[ch - 1], s->delay[ch - 1], + s->tmp_output, s->window, 128); + for (i = 0; i < 128; i++) + x[i] = s->transform_coeffs[ch][2 * i + 1]; + s->imdct_256.imdct_half(&s->imdct_256, s->delay[ch - 1], x); } else { s->imdct_512.imdct_half(&s->imdct_512, s->tmp_output, s->transform_coeffs[ch]); - s->dsp.vector_fmul_window(s->output[ch-1], s->delay[ch-1], s->tmp_output, s->window, 128); - memcpy(s->delay[ch-1], s->tmp_output+128, 128*sizeof(float)); + s->dsp.vector_fmul_window(s->output[ch - 1], s->delay[ch - 1], + s->tmp_output, s->window, 128); + memcpy(s->delay[ch - 1], s->tmp_output + 128, 128 * sizeof(float)); } } } @@ -641,24 +640,25 @@ static inline void do_imdct(AC3DecodeContext *s, int channels) /** * Downmix the output to mono or stereo. */ -void ff_ac3_downmix_c(float (*samples)[256], float (*matrix)[2], int out_ch, int in_ch, int len) +void ff_ac3_downmix_c(float (*samples)[256], float (*matrix)[2], + int out_ch, int in_ch, int len) { int i, j; float v0, v1; - if(out_ch == 2) { - for(i=0; idelay[0]); - switch(s->channel_mode) { - case AC3_CHMODE_DUALMONO: - case AC3_CHMODE_STEREO: - /* upmix mono to stereo */ - memcpy(s->delay[1], s->delay[0], channel_data_size); - break; - case AC3_CHMODE_2F2R: - memset(s->delay[3], 0, channel_data_size); - case AC3_CHMODE_2F1R: - memset(s->delay[2], 0, channel_data_size); - break; - case AC3_CHMODE_3F2R: - memset(s->delay[4], 0, channel_data_size); - case AC3_CHMODE_3F1R: - memset(s->delay[3], 0, channel_data_size); - case AC3_CHMODE_3F: - memcpy(s->delay[2], s->delay[1], channel_data_size); - memset(s->delay[1], 0, channel_data_size); - break; + switch (s->channel_mode) { + case AC3_CHMODE_DUALMONO: + case AC3_CHMODE_STEREO: + /* upmix mono to stereo */ + memcpy(s->delay[1], s->delay[0], channel_data_size); + break; + case AC3_CHMODE_2F2R: + memset(s->delay[3], 0, channel_data_size); + case AC3_CHMODE_2F1R: + memset(s->delay[2], 0, channel_data_size); + break; + case AC3_CHMODE_3F2R: + memset(s->delay[4], 0, channel_data_size); + case AC3_CHMODE_3F1R: + memset(s->delay[3], 0, channel_data_size); + case AC3_CHMODE_3F: + memcpy(s->delay[2], s->delay[1], channel_data_size); + memset(s->delay[1], 0, channel_data_size); + break; } } @@ -742,7 +742,7 @@ static void decode_band_structure(GetBitContext *gbc, int blk, int eac3, bnd_sz[0] = ecpl ? 6 : 12; for (bnd = 0, subbnd = 1; subbnd < n_subbands; subbnd++) { int subbnd_size = (ecpl && subbnd < 4) ? 6 : 12; - if (band_struct[subbnd-1]) { + if (band_struct[subbnd - 1]) { n_bands--; bnd_sz[bnd] += subbnd_size; } else { @@ -779,7 +779,7 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) if (s->block_switch_syntax) { for (ch = 1; ch <= fbw_channels; ch++) { s->block_switch[ch] = get_bits1(gbc); - if(ch > 1 && s->block_switch[ch] != s->block_switch[1]) + if (ch > 1 && s->block_switch[ch] != s->block_switch[1]) different_transforms = 1; } } @@ -794,13 +794,13 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) /* dynamic range */ i = !(s->channel_mode); do { - if(get_bits1(gbc)) { - s->dynamic_range[i] = ((dynamic_range_tab[get_bits(gbc, 8)]-1.0) * - s->drc_scale)+1.0; - } else if(blk == 0) { + if (get_bits1(gbc)) { + s->dynamic_range[i] = ((dynamic_range_tab[get_bits(gbc, 8)] - 1.0) * + s->drc_scale) + 1.0; + } else if (blk == 0) { s->dynamic_range[i] = 1.0f; } - } while(i--); + } while (i--); /* spectral extension strategy */ if (s->eac3 && (!blk || get_bits1(gbc))) { @@ -881,7 +881,8 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) bandsize = s->spx_band_sizes[bnd]; nratio = ((float)((bin + (bandsize >> 1))) / s->spx_dst_end_freq) - spx_blend; nratio = av_clipf(nratio, 0.0f, 1.0f); - nblend = sqrtf(3.0f * nratio); // noise is scaled by sqrt(3) to give unity variance + nblend = sqrtf(3.0f * nratio); // noise is scaled by sqrt(3) + // to give unity variance sblend = sqrtf(1.0f - nratio); bin += bandsize; @@ -891,7 +892,7 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) if (spx_coord_exp == 15) spx_coord_mant <<= 1; else spx_coord_mant += 4; spx_coord_mant <<= (25 - spx_coord_exp - master_spx_coord); - spx_coord = spx_coord_mant * (1.0f/(1<<23)); + spx_coord = spx_coord_mant * (1.0f / (1 << 23)); /* multiply noise and signal blending factors by spx coordinate */ s->spx_noise_blend [ch][bnd] = nblend * spx_coord; @@ -964,8 +965,9 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) s->phase_flags_in_use = 0; } } else if (!s->eac3) { - if(!blk) { - av_log(s->avctx, AV_LOG_ERROR, "new coupling strategy must be present in block 0\n"); + if (!blk) { + av_log(s->avctx, AV_LOG_ERROR, "new coupling strategy must " + "be present in block 0\n"); return -1; } else { s->cpl_in_use[blk] = s->cpl_in_use[blk-1]; @@ -994,7 +996,8 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) s->cpl_coords[ch][bnd] >>= (cpl_coord_exp + master_cpl_coord); } } else if (!blk) { - av_log(s->avctx, AV_LOG_ERROR, "new coupling coordinates must be present in block 0\n"); + av_log(s->avctx, AV_LOG_ERROR, "new coupling coordinates must " + "be present in block 0\n"); return -1; } } else { @@ -1019,10 +1022,11 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) } else if (s->spx_in_use && s->spx_src_start_freq <= 61) { s->num_rematrixing_bands--; } - for(bnd=0; bndnum_rematrixing_bands; bnd++) + for (bnd = 0; bnd < s->num_rematrixing_bands; bnd++) s->rematrixing_flags[bnd] = get_bits1(gbc); } else if (!blk) { - av_log(s->avctx, AV_LOG_WARNING, "Warning: new rematrixing strategy not present in block 0\n"); + av_log(s->avctx, AV_LOG_WARNING, "Warning: " + "new rematrixing strategy not present in block 0\n"); s->num_rematrixing_bands = 0; } } @@ -1031,7 +1035,7 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) for (ch = !cpl_in_use; ch <= s->channels; ch++) { if (!s->eac3) s->exp_strategy[blk][ch] = get_bits(gbc, 2 - (ch == s->lfe_ch)); - if(s->exp_strategy[blk][ch] != EXP_REUSE) + if (s->exp_strategy[blk][ch] != EXP_REUSE) bit_alloc_stages[ch] = 3; } @@ -1054,8 +1058,8 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) s->end_freq[ch] = bandwidth_code * 3 + 73; } group_size = 3 << (s->exp_strategy[blk][ch] - 1); - s->num_exp_groups[ch] = (s->end_freq[ch]+group_size-4) / group_size; - if(blk > 0 && s->end_freq[ch] != prev) + s->num_exp_groups[ch] = (s->end_freq[ch] + group_size-4) / group_size; + if (blk > 0 && s->end_freq[ch] != prev) memset(bit_alloc_stages, 3, AC3_MAX_CHANNELS); } } @@ -1074,7 +1078,7 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) av_log(s->avctx, AV_LOG_ERROR, "exponent out-of-range\n"); return -1; } - if(ch != CPL_CH && ch != s->lfe_ch) + if (ch != CPL_CH && ch != s->lfe_ch) skip_bits(gbc, 2); /* skip gainrng */ } } @@ -1087,17 +1091,18 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) s->bit_alloc_params.slow_gain = ff_ac3_slow_gain_tab[get_bits(gbc, 2)]; s->bit_alloc_params.db_per_bit = ff_ac3_db_per_bit_tab[get_bits(gbc, 2)]; s->bit_alloc_params.floor = ff_ac3_floor_tab[get_bits(gbc, 3)]; - for(ch=!cpl_in_use; ch<=s->channels; ch++) + for (ch = !cpl_in_use; ch <= s->channels; ch++) bit_alloc_stages[ch] = FFMAX(bit_alloc_stages[ch], 2); } else if (!blk) { - av_log(s->avctx, AV_LOG_ERROR, "new bit allocation info must be present in block 0\n"); + av_log(s->avctx, AV_LOG_ERROR, "new bit allocation info must " + "be present in block 0\n"); return -1; } } /* signal-to-noise ratio offsets and fast gains (signal-to-mask ratios) */ - if(!s->eac3 || !blk){ - if(s->snr_offset_strategy && get_bits1(gbc)) { + if (!s->eac3 || !blk) { + if (s->snr_offset_strategy && get_bits1(gbc)) { int snr = 0; int csnr; csnr = (get_bits(gbc, 6) - 15) << 4; @@ -1106,7 +1111,7 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) if (ch == i || s->snr_offset_strategy == 2) snr = (csnr + get_bits(gbc, 4)) << 2; /* run at least last bit allocation stage if snr offset changes */ - if(blk && s->snr_offset[ch] != snr) { + if (blk && s->snr_offset[ch] != snr) { bit_alloc_stages[ch] = FFMAX(bit_alloc_stages[ch], 1); } s->snr_offset[ch] = snr; @@ -1116,7 +1121,7 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) int prev = s->fast_gain[ch]; s->fast_gain[ch] = ff_ac3_fast_gain_tab[get_bits(gbc, 3)]; /* run last 2 bit allocation stages if fast gain changes */ - if(blk && prev != s->fast_gain[ch]) + if (blk && prev != s->fast_gain[ch]) bit_alloc_stages[ch] = FFMAX(bit_alloc_stages[ch], 2); } } @@ -1132,7 +1137,7 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) int prev = s->fast_gain[ch]; s->fast_gain[ch] = ff_ac3_fast_gain_tab[get_bits(gbc, 3)]; /* run last 2 bit allocation stages if fast gain changes */ - if(blk && prev != s->fast_gain[ch]) + if (blk && prev != s->fast_gain[ch]) bit_alloc_stages[ch] = FFMAX(bit_alloc_stages[ch], 2); } } else if (s->eac3 && !blk) { @@ -1152,14 +1157,15 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) int sl = get_bits(gbc, 3); /* run last 2 bit allocation stages for coupling channel if coupling leak changes */ - if(blk && (fl != s->bit_alloc_params.cpl_fast_leak || - sl != s->bit_alloc_params.cpl_slow_leak)) { + if (blk && (fl != s->bit_alloc_params.cpl_fast_leak || + sl != s->bit_alloc_params.cpl_slow_leak)) { bit_alloc_stages[CPL_CH] = FFMAX(bit_alloc_stages[CPL_CH], 2); } s->bit_alloc_params.cpl_fast_leak = fl; s->bit_alloc_params.cpl_slow_leak = sl; } else if (!s->eac3 && !blk) { - av_log(s->avctx, AV_LOG_ERROR, "new coupling leak info must be present in block 0\n"); + av_log(s->avctx, AV_LOG_ERROR, "new coupling leak info must " + "be present in block 0\n"); return -1; } s->first_cpl_leak = 0; @@ -1183,40 +1189,40 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) for (seg = 0; seg < s->dba_nsegs[ch]; seg++) { s->dba_offsets[ch][seg] = get_bits(gbc, 5); s->dba_lengths[ch][seg] = get_bits(gbc, 4); - s->dba_values[ch][seg] = get_bits(gbc, 3); + s->dba_values[ch][seg] = get_bits(gbc, 3); } /* run last 2 bit allocation stages if new dba values */ bit_alloc_stages[ch] = FFMAX(bit_alloc_stages[ch], 2); } } - } else if(blk == 0) { - for(ch=0; ch<=s->channels; ch++) { + } else if (blk == 0) { + for (ch = 0; ch <= s->channels; ch++) { s->dba_mode[ch] = DBA_NONE; } } /* Bit allocation */ - for(ch=!cpl_in_use; ch<=s->channels; ch++) { - if(bit_alloc_stages[ch] > 2) { + for (ch = !cpl_in_use; ch <= s->channels; ch++) { + if (bit_alloc_stages[ch] > 2) { /* Exponent mapping into PSD and PSD integration */ ff_ac3_bit_alloc_calc_psd(s->dexps[ch], s->start_freq[ch], s->end_freq[ch], s->psd[ch], s->band_psd[ch]); } - if(bit_alloc_stages[ch] > 1) { + if (bit_alloc_stages[ch] > 1) { /* Compute excitation function, Compute masking curve, and Apply delta bit allocation */ if (ff_ac3_bit_alloc_calc_mask(&s->bit_alloc_params, s->band_psd[ch], - s->start_freq[ch], s->end_freq[ch], - s->fast_gain[ch], (ch == s->lfe_ch), - s->dba_mode[ch], s->dba_nsegs[ch], + s->start_freq[ch], s->end_freq[ch], + s->fast_gain[ch], (ch == s->lfe_ch), + s->dba_mode[ch], s->dba_nsegs[ch], s->dba_offsets[ch], s->dba_lengths[ch], - s->dba_values[ch], s->mask[ch])) { + s->dba_values[ch], s->mask[ch])) { av_log(s->avctx, AV_LOG_ERROR, "error in bit allocation\n"); return -1; } } - if(bit_alloc_stages[ch] > 0) { + if (bit_alloc_stages[ch] > 0) { /* Compute bit allocation */ const uint8_t *bap_tab = s->channel_uses_aht[ch] ? ff_eac3_hebap_tab : ff_ac3_bap_tab; @@ -1231,7 +1237,7 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) /* unused dummy data */ if (s->skip_syntax && get_bits1(gbc)) { int skipl = get_bits(gbc, 9); - while(skipl--) + while (skipl--) skip_bits(gbc, 8); } @@ -1242,18 +1248,19 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) /* TODO: generate enhanced coupling coordinates and uncouple */ /* recover coefficients if rematrixing is in use */ - if(s->channel_mode == AC3_CHMODE_STEREO) + if (s->channel_mode == AC3_CHMODE_STEREO) do_rematrixing(s); /* apply scaling to coefficients (headroom, dynrng) */ - for(ch=1; ch<=s->channels; ch++) { + for (ch = 1; ch <= s->channels; ch++) { float gain = s->mul_bias / 4194304.0f; - if(s->channel_mode == AC3_CHMODE_DUALMONO) { - gain *= s->dynamic_range[2-ch]; + if (s->channel_mode == AC3_CHMODE_DUALMONO) { + gain *= s->dynamic_range[2 - ch]; } else { gain *= s->dynamic_range[0]; } - s->fmt_conv.int32_to_float_fmul_scalar(s->transform_coeffs[ch], s->fixed_coeffs[ch], gain, 256); + s->fmt_conv.int32_to_float_fmul_scalar(s->transform_coeffs[ch], + s->fixed_coeffs[ch], gain, 256); } /* apply spectral extension to high frequency bins */ @@ -1267,27 +1274,30 @@ static int decode_audio_block(AC3DecodeContext *s, int blk) downmix_output = s->channels != s->out_channels && !((s->output_mode & AC3_OUTPUT_LFEON) && s->fbw_channels == s->out_channels); - if(different_transforms) { + if (different_transforms) { /* the delay samples have already been downmixed, so we upmix the delay samples in order to reconstruct all channels before downmixing. */ - if(s->downmixed) { + if (s->downmixed) { s->downmixed = 0; ac3_upmix_delay(s); } do_imdct(s, s->channels); - if(downmix_output) { - s->dsp.ac3_downmix(s->output, s->downmix_coeffs, s->out_channels, s->fbw_channels, 256); + if (downmix_output) { + s->dsp.ac3_downmix(s->output, s->downmix_coeffs, + s->out_channels, s->fbw_channels, 256); } } else { - if(downmix_output) { - s->dsp.ac3_downmix(s->transform_coeffs+1, s->downmix_coeffs, s->out_channels, s->fbw_channels, 256); + if (downmix_output) { + s->dsp.ac3_downmix(s->transform_coeffs + 1, s->downmix_coeffs, + s->out_channels, s->fbw_channels, 256); } - if(downmix_output && !s->downmixed) { + if (downmix_output && !s->downmixed) { s->downmixed = 1; - s->dsp.ac3_downmix(s->delay, s->downmix_coeffs, s->out_channels, s->fbw_channels, 128); + s->dsp.ac3_downmix(s->delay, s->downmix_coeffs, s->out_channels, + s->fbw_channels, 128); } do_imdct(s, s->out_channels); @@ -1327,33 +1337,34 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data, err = parse_frame_header(s); if (err) { - switch(err) { - case AAC_AC3_PARSE_ERROR_SYNC: - av_log(avctx, AV_LOG_ERROR, "frame sync error\n"); - return -1; - case AAC_AC3_PARSE_ERROR_BSID: - av_log(avctx, AV_LOG_ERROR, "invalid bitstream id\n"); - break; - case AAC_AC3_PARSE_ERROR_SAMPLE_RATE: - av_log(avctx, AV_LOG_ERROR, "invalid sample rate\n"); - break; - case AAC_AC3_PARSE_ERROR_FRAME_SIZE: - av_log(avctx, AV_LOG_ERROR, "invalid frame size\n"); - break; - case AAC_AC3_PARSE_ERROR_FRAME_TYPE: - /* skip frame if CRC is ok. otherwise use error concealment. */ - /* TODO: add support for substreams and dependent frames */ - if(s->frame_type == EAC3_FRAME_TYPE_DEPENDENT || s->substreamid) { - av_log(avctx, AV_LOG_ERROR, "unsupported frame type : skipping frame\n"); - *got_frame_ptr = 0; - return s->frame_size; - } else { - av_log(avctx, AV_LOG_ERROR, "invalid frame type\n"); - } - break; - default: - av_log(avctx, AV_LOG_ERROR, "invalid header\n"); - break; + switch (err) { + case AAC_AC3_PARSE_ERROR_SYNC: + av_log(avctx, AV_LOG_ERROR, "frame sync error\n"); + return -1; + case AAC_AC3_PARSE_ERROR_BSID: + av_log(avctx, AV_LOG_ERROR, "invalid bitstream id\n"); + break; + case AAC_AC3_PARSE_ERROR_SAMPLE_RATE: + av_log(avctx, AV_LOG_ERROR, "invalid sample rate\n"); + break; + case AAC_AC3_PARSE_ERROR_FRAME_SIZE: + av_log(avctx, AV_LOG_ERROR, "invalid frame size\n"); + break; + case AAC_AC3_PARSE_ERROR_FRAME_TYPE: + /* skip frame if CRC is ok. otherwise use error concealment. */ + /* TODO: add support for substreams and dependent frames */ + if (s->frame_type == EAC3_FRAME_TYPE_DEPENDENT || s->substreamid) { + av_log(avctx, AV_LOG_ERROR, "unsupported frame type : " + "skipping frame\n"); + *got_frame_ptr = 0; + return s->frame_size; + } else { + av_log(avctx, AV_LOG_ERROR, "invalid frame type\n"); + } + break; + default: + av_log(avctx, AV_LOG_ERROR, "invalid header\n"); + break; } } else { /* check that reported frame size fits in input buffer */ @@ -1362,7 +1373,8 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data, err = AAC_AC3_PARSE_ERROR_FRAME_SIZE; } else if (avctx->err_recognition & AV_EF_CRCCHECK) { /* check for crc mismatch */ - if (av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, &buf[2], s->frame_size-2)) { + if (av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, &buf[2], + s->frame_size - 2)) { av_log(avctx, AV_LOG_ERROR, "frame CRC mismatch\n"); err = AAC_AC3_PARSE_ERROR_CRC; } @@ -1372,12 +1384,12 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data, /* if frame is ok, set audio parameters */ if (!err) { avctx->sample_rate = s->sample_rate; - avctx->bit_rate = s->bit_rate; + avctx->bit_rate = s->bit_rate; /* channel config */ s->out_channels = s->channels; - s->output_mode = s->channel_mode; - if(s->lfe_on) + s->output_mode = s->channel_mode; + if (s->lfe_on) s->output_mode |= AC3_OUTPUT_LFEON; if (avctx->request_channels > 0 && avctx->request_channels <= 2 && avctx->request_channels < s->channels) { @@ -1385,17 +1397,17 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data, s->output_mode = avctx->request_channels == 1 ? AC3_CHMODE_MONO : AC3_CHMODE_STEREO; s->channel_layout = ff_ac3_channel_layout_tab[s->output_mode]; } - avctx->channels = s->out_channels; + avctx->channels = s->out_channels; avctx->channel_layout = s->channel_layout; /* set downmixing coefficients if needed */ - if(s->channels != s->out_channels && !((s->output_mode & AC3_OUTPUT_LFEON) && + if (s->channels != s->out_channels && !((s->output_mode & AC3_OUTPUT_LFEON) && s->fbw_channels == s->out_channels)) { set_downmix_coeffs(s); } } else if (!s->out_channels) { s->out_channels = avctx->channels; - if(s->out_channels < s->channels) + if (s->out_channels < s->channels) s->output_mode = s->out_channels == 1 ? AC3_CHMODE_MONO : AC3_CHMODE_STEREO; } /* set audio service type based on bitstream mode for AC-3 */ @@ -1465,19 +1477,19 @@ static const AVClass ac3_decoder_class = { }; AVCodec ff_ac3_decoder = { - .name = "ac3", - .type = AVMEDIA_TYPE_AUDIO, - .id = CODEC_ID_AC3, + .name = "ac3", + .type = AVMEDIA_TYPE_AUDIO, + .id = CODEC_ID_AC3, .priv_data_size = sizeof (AC3DecodeContext), - .init = ac3_decode_init, - .close = ac3_decode_end, - .decode = ac3_decode_frame, - .capabilities = CODEC_CAP_DR1, - .long_name = NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"), - .sample_fmts = (const enum AVSampleFormat[]) { - AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE - }, - .priv_class = &ac3_decoder_class, + .init = ac3_decode_init, + .close = ac3_decode_end, + .decode = ac3_decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"), + .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLT, + AV_SAMPLE_FMT_S16, + AV_SAMPLE_FMT_NONE }, + .priv_class = &ac3_decoder_class, }; #if CONFIG_EAC3_DECODER @@ -1487,19 +1499,20 @@ static const AVClass eac3_decoder_class = { .option = options, .version = LIBAVUTIL_VERSION_INT, }; + AVCodec ff_eac3_decoder = { - .name = "eac3", - .type = AVMEDIA_TYPE_AUDIO, - .id = CODEC_ID_EAC3, + .name = "eac3", + .type = AVMEDIA_TYPE_AUDIO, + .id = CODEC_ID_EAC3, .priv_data_size = sizeof (AC3DecodeContext), - .init = ac3_decode_init, - .close = ac3_decode_end, - .decode = ac3_decode_frame, - .capabilities = CODEC_CAP_DR1, - .long_name = NULL_IF_CONFIG_SMALL("ATSC A/52B (AC-3, E-AC-3)"), - .sample_fmts = (const enum AVSampleFormat[]) { - AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE - }, - .priv_class = &eac3_decoder_class, + .init = ac3_decode_init, + .close = ac3_decode_end, + .decode = ac3_decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("ATSC A/52B (AC-3, E-AC-3)"), + .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLT, + AV_SAMPLE_FMT_S16, + AV_SAMPLE_FMT_NONE }, + .priv_class = &eac3_decoder_class, }; #endif -- cgit v1.2.3