static int dca_subframe_header(DCAContext *s, int base_channel, int block_index) { /* Primary audio coding side information */ int j, k; if (get_bits_left(&s->gb) < 0) return AVERROR_INVALIDDATA; if (!base_channel) { s->subsubframes[s->current_subframe] = get_bits(&s->gb, 2) + 1; s->partial_samples[s->current_subframe] = get_bits(&s->gb, 3); } for (j = base_channel; j < s->prim_channels; j++) { for (k = 0; k < s->subband_activity[j]; k++) s->prediction_mode[j][k] = get_bits(&s->gb, 1); } /* Get prediction codebook */ for (j = base_channel; j < s->prim_channels; j++) { for (k = 0; k < s->subband_activity[j]; k++) { if (s->prediction_mode[j][k] > 0) { /* (Prediction coefficient VQ address) */ s->prediction_vq[j][k] = get_bits(&s->gb, 12); } } } /* Bit allocation index */ for (j = base_channel; j < s->prim_channels; j++) { for (k = 0; k < s->vq_start_subband[j]; k++) { if (s->bitalloc_huffman[j] == 6) s->bitalloc[j][k] = get_bits(&s->gb, 5); else if (s->bitalloc_huffman[j] == 5) s->bitalloc[j][k] = get_bits(&s->gb, 4); else if (s->bitalloc_huffman[j] == 7) { av_log(s->avctx, AV_LOG_ERROR, "Invalid bit allocation index\n"); return AVERROR_INVALIDDATA; } else { s->bitalloc[j][k] = get_bitalloc(&s->gb, &dca_bitalloc_index, s->bitalloc_huffman[j]); } if (s->bitalloc[j][k] > 26) { // av_log(s->avctx, AV_LOG_DEBUG, "bitalloc index [%i][%i] too big (%i)\n", // j, k, s->bitalloc[j][k]); return AVERROR_INVALIDDATA; } } } /* Transition mode */ for (j = base_channel; j < s->prim_channels; j++) { for (k = 0; k < s->subband_activity[j]; k++) { s->transition_mode[j][k] = 0; if (s->subsubframes[s->current_subframe] > 1 && k < s->vq_start_subband[j] && s->bitalloc[j][k] > 0) { s->transition_mode[j][k] = get_bitalloc(&s->gb, &dca_tmode, s->transient_huffman[j]); } } } if (get_bits_left(&s->gb) < 0) return AVERROR_INVALIDDATA; for (j = base_channel; j < s->prim_channels; j++) { const uint32_t *scale_table; int scale_sum; memset(s->scale_factor[j], 0, s->subband_activity[j] * sizeof(s->scale_factor[0][0][0]) * 2); if (s->scalefactor_huffman[j] == 6) scale_table = scale_factor_quant7; else scale_table = scale_factor_quant6; /* When huffman coded, only the difference is encoded */ scale_sum = 0; for (k = 0; k < s->subband_activity[j]; k++) { if (k >= s->vq_start_subband[j] || s->bitalloc[j][k] > 0) { scale_sum = get_scale(&s->gb, s->scalefactor_huffman[j], scale_sum); s->scale_factor[j][k][0] = scale_table[scale_sum]; } if (k < s->vq_start_subband[j] && s->transition_mode[j][k]) { /* Get second scale factor */ scale_sum = get_scale(&s->gb, s->scalefactor_huffman[j], scale_sum); s->scale_factor[j][k][1] = scale_table[scale_sum]; } } } /* Joint subband scale factor codebook select */ for (j = base_channel; j < s->prim_channels; j++) { /* Transmitted only if joint subband coding enabled */ if (s->joint_intensity[j] > 0) s->joint_huff[j] = get_bits(&s->gb, 3); } if (get_bits_left(&s->gb) < 0) return AVERROR_INVALIDDATA; /* Scale factors for joint subband coding */ for (j = base_channel; j < s->prim_channels; j++) { int source_channel; /* Transmitted only if joint subband coding enabled */ if (s->joint_intensity[j] > 0) { int scale = 0; source_channel = s->joint_intensity[j] - 1; /* When huffman coded, only the difference is encoded * (is this valid as well for joint scales ???) */ for (k = s->subband_activity[j]; k < s->subband_activity[source_channel]; k++) { scale = get_scale(&s->gb, s->joint_huff[j], 0); scale += 64; /* bias */ s->joint_scale_factor[j][k] = scale; /*joint_scale_table[scale]; */ } if (!(s->debug_flag & 0x02)) { av_log(s->avctx, AV_LOG_DEBUG, "Joint stereo coding not supported\n"); s->debug_flag |= 0x02; } } } /* Stereo downmix coefficients */ if (!base_channel && s->prim_channels > 2) { if (s->downmix) { for (j = base_channel; j < s->prim_channels; j++) { s->downmix_coef[j][0] = get_bits(&s->gb, 7); s->downmix_coef[j][1] = get_bits(&s->gb, 7); } } else { int am = s->amode & DCA_CHANNEL_MASK; for (j = base_channel; j < s->prim_channels; j++) { s->downmix_coef[j][0] = dca_default_coeffs[am][j][0]; s->downmix_coef[j][1] = dca_default_coeffs[am][j][1]; } } } /* Dynamic range coefficient */ if (!base_channel && s->dynrange) s->dynrange_coef = get_bits(&s->gb, 8); /* Side information CRC check word */ if (s->crc_present) { get_bits(&s->gb, 16); } /* * Primary audio data arrays */ /* VQ encoded high frequency subbands */ for (j = base_channel; j < s->prim_channels; j++) for (k = s->vq_start_subband[j]; k < s->subband_activity[j]; k++) /* 1 vector -> 32 samples */ s->high_freq_vq[j][k] = get_bits(&s->gb, 10); /* Low frequency effect data */ if (!base_channel && s->lfe) { /* LFE samples */ int lfe_samples = 2 * s->lfe * (4 + block_index); int lfe_end_sample = 2 * s->lfe * (4 + block_index + s->subsubframes[s->current_subframe]); float lfe_scale; for (j = lfe_samples; j < lfe_end_sample; j++) { /* Signed 8 bits int */ s->lfe_data[j] = get_sbits(&s->gb, 8); } /* Scale factor index */ s->lfe_scale_factor = scale_factor_quant7[get_bits(&s->gb, 8)]; /* Quantization step size * scale factor */ lfe_scale = 0.035 * s->lfe_scale_factor; for (j = lfe_samples; j < lfe_end_sample; j++) s->lfe_data[j] *= lfe_scale; } #ifdef TRACE av_log(s->avctx, AV_LOG_DEBUG, "subsubframes: %i\n", s->subsubframes[s->current_subframe]); av_log(s->avctx, AV_LOG_DEBUG, "partial samples: %i\n", s->partial_samples[s->current_subframe]); for (j = base_channel; j < s->prim_channels; j++) { av_log(s->avctx, AV_LOG_DEBUG, "prediction mode:"); for (k = 0; k < s->subband_activity[j]; k++) av_log(s->avctx, AV_LOG_DEBUG, " %i", s->prediction_mode[j][k]); av_log(s->avctx, AV_LOG_DEBUG, "\n"); } for (j = base_channel; j < s->prim_channels; j++) { for (k = 0; k < s->subband_activity[j]; k++) av_log(s->avctx, AV_LOG_DEBUG, "prediction coefs: %f, %f, %f, %f\n", (float) adpcm_vb[s->prediction_vq[j][k]][0] / 8192, (float) adpcm_vb[s->prediction_vq[j][k]][1] / 8192, (float) adpcm_vb[s->prediction_vq[j][k]][2] / 8192, (float) adpcm_vb[s->prediction_vq[j][k]][3] / 8192); } for (j = base_channel; j < s->prim_channels; j++) { av_log(s->avctx, AV_LOG_DEBUG, "bitalloc index: "); for (k = 0; k < s->vq_start_subband[j]; k++) av_log(s->avctx, AV_LOG_DEBUG, "%2.2i ", s->bitalloc[j][k]); av_log(s->avctx, AV_LOG_DEBUG, "\n"); } for (j = base_channel; j < s->prim_channels; j++) { av_log(s->avctx, AV_LOG_DEBUG, "Transition mode:"); for (k = 0; k < s->subband_activity[j]; k++) av_log(s->avctx, AV_LOG_DEBUG, " %i", s->transition_mode[j][k]); av_log(s->avctx, AV_LOG_DEBUG, "\n"); } for (j = base_channel; j < s->prim_channels; j++) { av_log(s->avctx, AV_LOG_DEBUG, "Scale factor:"); for (k = 0; k < s->subband_activity[j]; k++) { if (k >= s->vq_start_subband[j] || s->bitalloc[j][k] > 0) av_log(s->avctx, AV_LOG_DEBUG, " %i", s->scale_factor[j][k][0]); if (k < s->vq_start_subband[j] && s->transition_mode[j][k]) av_log(s->avctx, AV_LOG_DEBUG, " %i(t)", s->scale_factor[j][k][1]); } av_log(s->avctx, AV_LOG_DEBUG, "\n"); } for (j = base_channel; j < s->prim_channels; j++) { if (s->joint_intensity[j] > 0) { int source_channel = s->joint_intensity[j] - 1; av_log(s->avctx, AV_LOG_DEBUG, "Joint scale factor index:\n"); for (k = s->subband_activity[j]; k < s->subband_activity[source_channel]; k++) av_log(s->avctx, AV_LOG_DEBUG, " %i", s->joint_scale_factor[j][k]); av_log(s->avctx, AV_LOG_DEBUG, "\n"); } } if (!base_channel && s->prim_channels > 2 && s->downmix) { av_log(s->avctx, AV_LOG_DEBUG, "Downmix coeffs:\n"); for (j = 0; j < s->prim_channels; j++) { av_log(s->avctx, AV_LOG_DEBUG, "Channel 0, %d = %f\n", j, dca_downmix_coeffs[s->downmix_coef[j][0]]); av_log(s->avctx, AV_LOG_DEBUG, "Channel 1, %d = %f\n", j, dca_downmix_coeffs[s->downmix_coef[j][1]]); } av_log(s->avctx, AV_LOG_DEBUG, "\n"); } for (j = base_channel; j < s->prim_channels; j++) for (k = s->vq_start_subband[j]; k < s->subband_activity[j]; k++) av_log(s->avctx, AV_LOG_DEBUG, "VQ index: %i\n", s->high_freq_vq[j][k]); if (!base_channel && s->lfe) { int lfe_samples = 2 * s->lfe * (4 + block_index); int lfe_end_sample = 2 * s->lfe * (4 + block_index + s->subsubframes[s->current_subframe]); av_log(s->avctx, AV_LOG_DEBUG, "LFE samples:\n"); for (j = lfe_samples; j < lfe_end_sample; j++) av_log(s->avctx, AV_LOG_DEBUG, " %f", s->lfe_data[j]); av_log(s->avctx, AV_LOG_DEBUG, "\n"); } #endif return 0; }