* Copyright (C) 2006 Benjamin Larsson
* Copyright (C) 2007 Konstantin Shishkov
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avcodec.h"
#include "fft.h"
#include "get_bits.h"
-#include "put_bits.h"
#include "dcadata.h"
#include "dcahuff.h"
#include "dca.h"
#define DCA_SUBFRAMES_MAX (16)
#define DCA_BLOCKS_MAX (16)
#define DCA_LFE_MAX (3)
+#define DCA_CHSETS_MAX (4)
+#define DCA_CHSET_CHANS_MAX (8)
enum DCAMode {
DCA_MONO = 0,
DCA_EXSS_REAR_HIGH_LEFT_RIGHT = 0x8000,
};
+enum DCAXxchSpeakerMask {
+ DCA_XXCH_FRONT_CENTER = 0x0000001,
+ DCA_XXCH_FRONT_LEFT = 0x0000002,
+ DCA_XXCH_FRONT_RIGHT = 0x0000004,
+ DCA_XXCH_SIDE_REAR_LEFT = 0x0000008,
+ DCA_XXCH_SIDE_REAR_RIGHT = 0x0000010,
+ DCA_XXCH_LFE1 = 0x0000020,
+ DCA_XXCH_REAR_CENTER = 0x0000040,
+ DCA_XXCH_SURROUND_REAR_LEFT = 0x0000080,
+ DCA_XXCH_SURROUND_REAR_RIGHT = 0x0000100,
+ DCA_XXCH_SIDE_SURROUND_LEFT = 0x0000200,
+ DCA_XXCH_SIDE_SURROUND_RIGHT = 0x0000400,
+ DCA_XXCH_FRONT_CENTER_LEFT = 0x0000800,
+ DCA_XXCH_FRONT_CENTER_RIGHT = 0x0001000,
+ DCA_XXCH_FRONT_HIGH_LEFT = 0x0002000,
+ DCA_XXCH_FRONT_HIGH_CENTER = 0x0004000,
+ DCA_XXCH_FRONT_HIGH_RIGHT = 0x0008000,
+ DCA_XXCH_LFE2 = 0x0010000,
+ DCA_XXCH_SIDE_FRONT_LEFT = 0x0020000,
+ DCA_XXCH_SIDE_FRONT_RIGHT = 0x0040000,
+ DCA_XXCH_OVERHEAD = 0x0080000,
+ DCA_XXCH_SIDE_HIGH_LEFT = 0x0100000,
+ DCA_XXCH_SIDE_HIGH_RIGHT = 0x0200000,
+ DCA_XXCH_REAR_HIGH_CENTER = 0x0400000,
+ DCA_XXCH_REAR_HIGH_LEFT = 0x0800000,
+ DCA_XXCH_REAR_HIGH_RIGHT = 0x1000000,
+ DCA_XXCH_REAR_LOW_CENTER = 0x2000000,
+ DCA_XXCH_REAR_LOW_LEFT = 0x4000000,
+ DCA_XXCH_REAR_LOW_RIGHT = 0x8000000,
+};
+
+static const uint32_t map_xxch_to_native[28] = {
+ AV_CH_FRONT_CENTER,
+ AV_CH_FRONT_LEFT,
+ AV_CH_FRONT_RIGHT,
+ AV_CH_SIDE_LEFT,
+ AV_CH_SIDE_RIGHT,
+ AV_CH_LOW_FREQUENCY,
+ AV_CH_BACK_CENTER,
+ AV_CH_BACK_LEFT,
+ AV_CH_BACK_RIGHT,
+ AV_CH_SIDE_LEFT, /* side surround left -- dup sur side L */
+ AV_CH_SIDE_RIGHT, /* side surround right -- dup sur side R */
+ AV_CH_FRONT_LEFT_OF_CENTER,
+ AV_CH_FRONT_RIGHT_OF_CENTER,
+ AV_CH_TOP_FRONT_LEFT,
+ AV_CH_TOP_FRONT_CENTER,
+ AV_CH_TOP_FRONT_RIGHT,
+ AV_CH_LOW_FREQUENCY, /* lfe2 -- duplicate lfe1 position */
+ AV_CH_FRONT_LEFT_OF_CENTER, /* side front left -- dup front cntr L */
+ AV_CH_FRONT_RIGHT_OF_CENTER,/* side front right -- dup front cntr R */
+ AV_CH_TOP_CENTER, /* overhead */
+ AV_CH_TOP_FRONT_LEFT, /* side high left -- dup */
+ AV_CH_TOP_FRONT_RIGHT, /* side high right -- dup */
+ AV_CH_TOP_BACK_CENTER,
+ AV_CH_TOP_BACK_LEFT,
+ AV_CH_TOP_BACK_RIGHT,
+ AV_CH_BACK_CENTER, /* rear low center -- dup */
+ AV_CH_BACK_LEFT, /* rear low left -- dup */
+ AV_CH_BACK_RIGHT /* read low right -- dup */
+};
+
enum DCAExtensionMask {
DCA_EXT_CORE = 0x001, ///< core in core substream
DCA_EXT_XXCH = 0x002, ///< XXCh channels extension in core substream
}
typedef struct {
- AVClass *class; ///< class for AVOptions
+ const AVClass *class; ///< class for AVOptions
AVCodecContext *avctx;
/* Frame header */
int frame_type; ///< type of the current frame
int xch_base_channel; ///< index of first (only) channel containing XCH data
int xch_disable; ///< whether the XCh extension should be decoded or not
+ /* XXCH extension information */
+ int xxch_chset;
+ int xxch_nbits_spk_mask;
+ uint32_t xxch_core_spkmask;
+ uint32_t xxch_spk_masks[4]; /* speaker masks, last element is core mask */
+ int xxch_chset_nch[4];
+ float xxch_dmix_sf[DCA_CHSETS_MAX];
+
+ uint32_t xxch_dmix_embedded; /* lower layer has mix pre-embedded, per chset */
+ float xxch_dmix_coeff[DCA_PRIM_CHANNELS_MAX][32]; /* worst case sizing */
+
+ int8_t xxch_order_tab[32];
+ int8_t lfe_index;
+
/* ExSS header parser */
int static_fields; ///< static fields present
int mix_metadata; ///< mixing metadata present
*dst++ = get_bits(gb, bits);
}
-static int dca_parse_audio_coding_header(DCAContext *s, int base_channel)
+static inline int dca_xxch2index(DCAContext *s, int xxch_ch)
+{
+ int i, base, mask;
+
+ /* locate channel set containing the channel */
+ for (i = -1, base = 0, mask = (s->xxch_core_spkmask & ~DCA_XXCH_LFE1);
+ i <= s->xxch_chset && !(mask & xxch_ch); mask = s->xxch_spk_masks[++i])
+ base += av_popcount(mask);
+
+ return base + av_popcount(mask & (xxch_ch - 1));
+}
+
+static int dca_parse_audio_coding_header(DCAContext *s, int base_channel,
+ int xxch)
{
int i, j;
static const float adj_table[4] = { 1.0, 1.1250, 1.2500, 1.4375 };
static const int bitlen[11] = { 0, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3 };
static const int thr[11] = { 0, 1, 3, 3, 3, 3, 7, 7, 7, 7, 7 };
+ int hdr_pos = 0, hdr_size = 0;
+ float sign, mag, scale_factor;
+ int this_chans, acc_mask;
+ int embedded_downmix;
+ int nchans, mask[8];
+ int coeff, ichan;
+
+ /* xxch has arbitrary sized audio coding headers */
+ if (xxch) {
+ hdr_pos = get_bits_count(&s->gb);
+ hdr_size = get_bits(&s->gb, 7) + 1;
+ }
- s->total_channels = get_bits(&s->gb, 3) + 1 + base_channel;
+ nchans = get_bits(&s->gb, 3) + 1;
+ s->total_channels = nchans + base_channel;
s->prim_channels = s->total_channels;
+ /* obtain speaker layout mask & downmix coefficients for XXCH */
+ if (xxch) {
+ acc_mask = s->xxch_core_spkmask;
+
+ this_chans = get_bits(&s->gb, s->xxch_nbits_spk_mask - 6) << 6;
+ s->xxch_spk_masks[s->xxch_chset] = this_chans;
+ s->xxch_chset_nch[s->xxch_chset] = nchans;
+
+ for (i = 0; i <= s->xxch_chset; i++)
+ acc_mask |= s->xxch_spk_masks[i];
+
+ /* check for downmixing information */
+ if (get_bits1(&s->gb)) {
+ embedded_downmix = get_bits1(&s->gb);
+ scale_factor =
+ 1.0f / dca_dmixtable[(get_bits(&s->gb, 6) - 1) << 2];
+
+ s->xxch_dmix_sf[s->xxch_chset] = scale_factor;
+
+ for (i = base_channel; i < s->prim_channels; i++) {
+ mask[i] = get_bits(&s->gb, s->xxch_nbits_spk_mask);
+ }
+
+ for (j = base_channel; j < s->prim_channels; j++) {
+ memset(s->xxch_dmix_coeff[j], 0, sizeof(s->xxch_dmix_coeff[0]));
+ s->xxch_dmix_embedded |= (embedded_downmix << j);
+ for (i = 0; i < s->xxch_nbits_spk_mask; i++) {
+ if (mask[j] & (1 << i)) {
+ if ((1 << i) == DCA_XXCH_LFE1) {
+ av_log(s->avctx, AV_LOG_WARNING,
+ "DCA-XXCH: dmix to LFE1 not supported.\n");
+ continue;
+ }
+
+ coeff = get_bits(&s->gb, 7);
+ sign = (coeff & 64) ? 1.0 : -1.0;
+ mag = dca_dmixtable[((coeff & 63) - 1) << 2];
+ ichan = dca_xxch2index(s, 1 << i);
+ s->xxch_dmix_coeff[j][ichan] = sign * mag;
+ }
+ }
+ }
+ }
+ }
+
if (s->prim_channels > DCA_PRIM_CHANNELS_MAX)
s->prim_channels = DCA_PRIM_CHANNELS_MAX;
if (s->quant_index_huffman[i][j] < thr[j])
s->scalefactor_adj[i][j] = adj_table[get_bits(&s->gb, 2)];
- if (s->crc_present) {
- /* Audio header CRC check */
- get_bits(&s->gb, 16);
+ if (!xxch) {
+ if (s->crc_present) {
+ /* Audio header CRC check */
+ get_bits(&s->gb, 16);
+ }
+ } else {
+ /* Skip to the end of the header, also ignore CRC if present */
+ i = get_bits_count(&s->gb);
+ if (hdr_pos + 8 * hdr_size > i)
+ skip_bits_long(&s->gb, hdr_pos + 8 * hdr_size - i);
}
s->current_subframe = 0;
s->predictor_history = get_bits(&s->gb, 1);
if (s->lfe > 2) {
+ s->lfe = 0;
av_log(s->avctx, AV_LOG_ERROR, "Invalid LFE value: %d\n", s->lfe);
return AVERROR_INVALIDDATA;
}
/* Primary audio coding header */
s->subframes = get_bits(&s->gb, 4) + 1;
- return dca_parse_audio_coding_header(s, 0);
+ return dca_parse_audio_coding_header(s, 0, 0);
}
/* Low frequency effect data */
if (!base_channel && s->lfe) {
+ int quant7;
/* 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]);
}
/* Scale factor index */
- skip_bits(&s->gb, 1);
- s->lfe_scale_factor = scale_factor_quant7[get_bits(&s->gb, 7)];
+ quant7 = get_bits(&s->gb, 8);
+ if (quant7 > 127) {
+ avpriv_request_sample(s->avctx, "LFEScaleIndex larger than 127");
+ return AVERROR_INVALIDDATA;
+ }
+ s->lfe_scale_factor = scale_factor_quant7[quant7];
/* Quantization step size * scale factor */
lfe_scale = 0.035 * s->lfe_scale_factor;
switch (srcfmt) {
case DCA_MONO:
case DCA_4F2R:
- av_log(NULL, 0, "Not implemented!\n");
+ av_log(NULL, AV_LOG_ERROR, "Not implemented!\n");
break;
case DCA_CHANNEL:
case DCA_STEREO:
else if (s->predictor_history)
sum += adpcm_vb[s->prediction_vq[k][l]][n - 1] *
s->subband_samples_hist[k][l][m - n + 4];
- subband_samples[k][l][m] += sum * 1.0f / 8192;
+ subband_samples[k][l][m] += sum * (1.0f / 8192);
}
}
}
if (s->lfe) {
lfe_interpolation_fir(s, s->lfe, 2 * s->lfe,
s->lfe_data + 2 * s->lfe * (block_index + 4),
- s->samples_chanptr[dca_lfe_index[s->amode]]);
+ s->samples_chanptr[s->lfe_index]);
/* Outputs 20bits pcm samples */
}
{
int header_pos = get_bits_count(&s->gb);
int header_size;
- int channels;
+ int channels = 0;
int embedded_stereo = 0;
int embedded_6ch = 0;
int drc_code_present;
- int extensions_mask;
+ int av_uninit(extensions_mask);
int i, j;
if (get_bits_left(&s->gb) < 16)
return 0;
}
+static int dca_xbr_parse_frame(DCAContext *s)
+{
+ int scale_table_high[DCA_CHSET_CHANS_MAX][DCA_SUBBANDS][2];
+ int active_bands[DCA_CHSETS_MAX][DCA_CHSET_CHANS_MAX];
+ int abits_high[DCA_CHSET_CHANS_MAX][DCA_SUBBANDS];
+ int anctemp[DCA_CHSET_CHANS_MAX];
+ int chset_fsize[DCA_CHSETS_MAX];
+ int n_xbr_ch[DCA_CHSETS_MAX];
+ int hdr_size, num_chsets, xbr_tmode, hdr_pos;
+ int i, j, k, l, chset, chan_base;
+
+ av_log(s->avctx, AV_LOG_DEBUG, "DTS-XBR: decoding XBR extension\n");
+
+ /* get bit position of sync header */
+ hdr_pos = get_bits_count(&s->gb) - 32;
+
+ hdr_size = get_bits(&s->gb, 6) + 1;
+ num_chsets = get_bits(&s->gb, 2) + 1;
+
+ for(i = 0; i < num_chsets; i++)
+ chset_fsize[i] = get_bits(&s->gb, 14) + 1;
+
+ xbr_tmode = get_bits1(&s->gb);
+
+ for(i = 0; i < num_chsets; i++) {
+ n_xbr_ch[i] = get_bits(&s->gb, 3) + 1;
+ k = get_bits(&s->gb, 2) + 5;
+ for(j = 0; j < n_xbr_ch[i]; j++)
+ active_bands[i][j] = get_bits(&s->gb, k) + 1;
+ }
+
+ /* skip to the end of the header */
+ i = get_bits_count(&s->gb);
+ if(hdr_pos + hdr_size * 8 > i)
+ skip_bits_long(&s->gb, hdr_pos + hdr_size * 8 - i);
+
+ /* loop over the channel data sets */
+ /* only decode as many channels as we've decoded base data for */
+ for(chset = 0, chan_base = 0;
+ chset < num_chsets && chan_base + n_xbr_ch[chset] <= s->prim_channels;
+ chan_base += n_xbr_ch[chset++]) {
+ int start_posn = get_bits_count(&s->gb);
+ int subsubframe = 0;
+ int subframe = 0;
+
+ /* loop over subframes */
+ for (k = 0; k < (s->sample_blocks / 8); k++) {
+ /* parse header if we're on first subsubframe of a block */
+ if(subsubframe == 0) {
+ /* Parse subframe header */
+ for(i = 0; i < n_xbr_ch[chset]; i++) {
+ anctemp[i] = get_bits(&s->gb, 2) + 2;
+ }
+
+ for(i = 0; i < n_xbr_ch[chset]; i++) {
+ get_array(&s->gb, abits_high[i], active_bands[chset][i], anctemp[i]);
+ }
+
+ for(i = 0; i < n_xbr_ch[chset]; i++) {
+ anctemp[i] = get_bits(&s->gb, 3);
+ if(anctemp[i] < 1) {
+ av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: SYNC ERROR\n");
+ return AVERROR_INVALIDDATA;
+ }
+ }
+
+ /* generate scale factors */
+ for(i = 0; i < n_xbr_ch[chset]; i++) {
+ const uint32_t *scale_table;
+ int nbits;
+
+ if (s->scalefactor_huffman[chan_base+i] == 6) {
+ scale_table = scale_factor_quant7;
+ } else {
+ scale_table = scale_factor_quant6;
+ }
+
+ nbits = anctemp[i];
+
+ for(j = 0; j < active_bands[chset][i]; j++) {
+ if(abits_high[i][j] > 0) {
+ scale_table_high[i][j][0] =
+ scale_table[get_bits(&s->gb, nbits)];
+
+ if(xbr_tmode && s->transition_mode[i][j]) {
+ scale_table_high[i][j][1] =
+ scale_table[get_bits(&s->gb, nbits)];
+ }
+ }
+ }
+ }
+ }
+
+ /* decode audio array for this block */
+ for(i = 0; i < n_xbr_ch[chset]; i++) {
+ for(j = 0; j < active_bands[chset][i]; j++) {
+ const int xbr_abits = abits_high[i][j];
+ const float quant_step_size = lossless_quant_d[xbr_abits];
+ const int sfi = xbr_tmode && s->transition_mode[i][j] && subsubframe >= s->transition_mode[i][j];
+ const float rscale = quant_step_size * scale_table_high[i][j][sfi];
+ float *subband_samples = s->subband_samples[k][chan_base+i][j];
+ int block[8];
+
+ if(xbr_abits <= 0)
+ continue;
+
+ if(xbr_abits > 7) {
+ get_array(&s->gb, block, 8, xbr_abits - 3);
+ } else {
+ int block_code1, block_code2, size, levels, err;
+
+ size = abits_sizes[xbr_abits - 1];
+ levels = abits_levels[xbr_abits - 1];
+
+ block_code1 = get_bits(&s->gb, size);
+ block_code2 = get_bits(&s->gb, size);
+ err = decode_blockcodes(block_code1, block_code2,
+ levels, block);
+ if (err) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "ERROR: DTS-XBR: block code look-up failed\n");
+ return AVERROR_INVALIDDATA;
+ }
+ }
+
+ /* scale & sum into subband */
+ for(l = 0; l < 8; l++)
+ subband_samples[l] += (float)block[l] * rscale;
+ }
+ }
+
+ /* check DSYNC marker */
+ if(s->aspf || subsubframe == s->subsubframes[subframe] - 1) {
+ if(get_bits(&s->gb, 16) != 0xffff) {
+ av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: Didn't get subframe DSYNC\n");
+ return AVERROR_INVALIDDATA;
+ }
+ }
+
+ /* advance sub-sub-frame index */
+ if(++subsubframe >= s->subsubframes[subframe]) {
+ subsubframe = 0;
+ subframe++;
+ }
+ }
+
+ /* skip to next channel set */
+ i = get_bits_count(&s->gb);
+ if(start_posn + chset_fsize[chset] * 8 != i) {
+ j = start_posn + chset_fsize[chset] * 8 - i;
+ if(j < 0 || j >= 8)
+ av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: end of channel set,"
+ " skipping further than expected (%d bits)\n", j);
+ skip_bits_long(&s->gb, j);
+ }
+ }
+
+ return 0;
+}
+
+/* parse initial header for XXCH and dump details */
+static int dca_xxch_decode_frame(DCAContext *s)
+{
+ int hdr_size, spkmsk_bits, num_chsets, core_spk, hdr_pos;
+ int i, chset, base_channel, chstart, fsize[8];
+
+ /* assume header word has already been parsed */
+ hdr_pos = get_bits_count(&s->gb) - 32;
+ hdr_size = get_bits(&s->gb, 6) + 1;
+ /*chhdr_crc =*/ skip_bits1(&s->gb);
+ spkmsk_bits = get_bits(&s->gb, 5) + 1;
+ num_chsets = get_bits(&s->gb, 2) + 1;
+
+ for (i = 0; i < num_chsets; i++)
+ fsize[i] = get_bits(&s->gb, 14) + 1;
+
+ core_spk = get_bits(&s->gb, spkmsk_bits);
+ s->xxch_core_spkmask = core_spk;
+ s->xxch_nbits_spk_mask = spkmsk_bits;
+ s->xxch_dmix_embedded = 0;
+
+ /* skip to the end of the header */
+ i = get_bits_count(&s->gb);
+ if (hdr_pos + hdr_size * 8 > i)
+ skip_bits_long(&s->gb, hdr_pos + hdr_size * 8 - i);
+
+ for (chset = 0; chset < num_chsets; chset++) {
+ chstart = get_bits_count(&s->gb);
+ base_channel = s->prim_channels;
+ s->xxch_chset = chset;
+
+ /* XXCH and Core headers differ, see 6.4.2 "XXCH Channel Set Header" vs.
+ 5.3.2 "Primary Audio Coding Header", DTS Spec 1.3.1 */
+ dca_parse_audio_coding_header(s, base_channel, 1);
+
+ /* decode channel data */
+ for (i = 0; i < (s->sample_blocks / 8); i++) {
+ if (dca_decode_block(s, base_channel, i)) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Error decoding DTS-XXCH extension\n");
+ continue;
+ }
+ }
+
+ /* skip to end of this section */
+ i = get_bits_count(&s->gb);
+ if (chstart + fsize[chset] * 8 > i)
+ skip_bits_long(&s->gb, chstart + fsize[chset] * 8 - i);
+ }
+ s->xxch_chset = num_chsets;
+
+ return 0;
+}
+
/**
* Parse extension substream header (HD)
*/
static void dca_exss_parse_header(DCAContext *s)
{
+ int asset_size[8];
int ss_index;
int blownup;
int num_audiop = 1;
int num_assets = 1;
int active_ss_mask[8];
int i, j;
+ int start_posn;
+ int hdrsize;
+ uint32_t mkr;
if (get_bits_left(&s->gb) < 52)
return;
+ start_posn = get_bits_count(&s->gb) - 32;
+
skip_bits(&s->gb, 8); // user data
ss_index = get_bits(&s->gb, 2);
blownup = get_bits1(&s->gb);
- skip_bits(&s->gb, 8 + 4 * blownup); // header_size
+ hdrsize = get_bits(&s->gb, 8 + 4 * blownup) + 1; // header_size
skip_bits(&s->gb, 16 + 4 * blownup); // hd_size
s->static_fields = get_bits1(&s->gb);
}
for (i = 0; i < num_assets; i++)
- skip_bits_long(&s->gb, 16 + 4 * blownup); // asset size
+ asset_size[i] = get_bits_long(&s->gb, 16 + 4 * blownup);
for (i = 0; i < num_assets; i++) {
if (dca_exss_parse_asset_header(s))
/* not parsed further, we were only interested in the extensions mask
* from the asset header */
+
+ if (num_assets > 0) {
+ j = get_bits_count(&s->gb);
+ if (start_posn + hdrsize * 8 > j)
+ skip_bits_long(&s->gb, start_posn + hdrsize * 8 - j);
+
+ for (i = 0; i < num_assets; i++) {
+ start_posn = get_bits_count(&s->gb);
+ mkr = get_bits_long(&s->gb, 32);
+
+ /* parse extensions that we know about */
+ if (mkr == 0x655e315e) {
+ dca_xbr_parse_frame(s);
+ } else if (mkr == 0x47004a03) {
+ dca_xxch_decode_frame(s);
+ s->core_ext_mask |= DCA_EXT_XXCH; /* xxx use for chan reordering */
+ } else {
+ av_log(s->avctx, AV_LOG_DEBUG,
+ "DTS-ExSS: unknown marker = 0x%08x\n", mkr);
+ }
+
+ /* skip to end of block */
+ j = get_bits_count(&s->gb);
+ if (start_posn + asset_size[i] * 8 > j)
+ skip_bits_long(&s->gb, start_posn + asset_size[i] * 8 - j);
+ }
+ }
}
/**
AVFrame *frame = data;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
-
+ int channel_mask;
+ int channel_layout;
int lfe_samples;
int num_core_channels = 0;
int i, ret;
- float **samples_flt;
+ float **samples_flt;
+ float *src_chan;
+ float *dst_chan;
DCAContext *s = avctx->priv_data;
- int channels, full_channels;
int core_ss_end;
-
+ int channels, full_channels;
+ float scale;
+ int achan;
+ int chset;
+ int mask;
+ int lavc;
+ int posn;
+ int j, k;
+ int endch;
s->xch_present = 0;
/* record number of core channels incase less than max channels are requested */
num_core_channels = s->prim_channels;
+ if (s->prim_channels + !!s->lfe > 2 &&
+ avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) {
+ /* Stereo downmix coefficients
+ *
+ * The decoder can only downmix to 2-channel, so we need to ensure
+ * embedded downmix coefficients are actually targeting 2-channel.
+ */
+ if (s->core_downmix && (s->core_downmix_amode == DCA_STEREO ||
+ s->core_downmix_amode == DCA_STEREO_TOTAL)) {
+ int sign, code;
+ for (i = 0; i < s->prim_channels + !!s->lfe; i++) {
+ sign = s->core_downmix_codes[i][0] & 0x100 ? 1 : -1;
+ code = s->core_downmix_codes[i][0] & 0x0FF;
+ s->downmix_coef[i][0] = (!code ? 0.0f :
+ sign * dca_dmixtable[code - 1]);
+ sign = s->core_downmix_codes[i][1] & 0x100 ? 1 : -1;
+ code = s->core_downmix_codes[i][1] & 0x0FF;
+ s->downmix_coef[i][1] = (!code ? 0.0f :
+ sign * dca_dmixtable[code - 1]);
+ }
+ s->output = s->core_downmix_amode;
+ } else {
+ int am = s->amode & DCA_CHANNEL_MASK;
+ if (am >= FF_ARRAY_ELEMS(dca_default_coeffs)) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Invalid channel mode %d\n", am);
+ return AVERROR_INVALIDDATA;
+ }
+ if (s->prim_channels + !!s->lfe >
+ FF_ARRAY_ELEMS(dca_default_coeffs[0])) {
+ avpriv_request_sample(s->avctx, "Downmixing %d channels",
+ s->prim_channels + !!s->lfe);
+ return AVERROR_PATCHWELCOME;
+ }
+ for (i = 0; i < s->prim_channels + !!s->lfe; i++) {
+ s->downmix_coef[i][0] = dca_default_coeffs[am][i][0];
+ s->downmix_coef[i][1] = dca_default_coeffs[am][i][1];
+ }
+ }
+ av_dlog(s->avctx, "Stereo downmix coeffs:\n");
+ for (i = 0; i < s->prim_channels + !!s->lfe; i++) {
+ av_dlog(s->avctx, "L, input channel %d = %f\n", i,
+ s->downmix_coef[i][0]);
+ av_dlog(s->avctx, "R, input channel %d = %f\n", i,
+ s->downmix_coef[i][1]);
+ }
+ av_dlog(s->avctx, "\n");
+ }
+
if (s->ext_coding)
s->core_ext_mask = dca_ext_audio_descr_mask[s->ext_descr];
else
/* only scan for extensions if ext_descr was unknown or indicated a
* supported XCh extension */
- if (s->core_ext_mask < 0 || s->core_ext_mask & DCA_EXT_XCH) {
+ if (s->core_ext_mask < 0 || s->core_ext_mask & (DCA_EXT_XCH | DCA_EXT_XXCH)) {
/* if ext_descr was unknown, clear s->core_ext_mask so that the
* extensions scan can fill it up */
continue;
}
+ if (s->xch_base_channel < 2) {
+ avpriv_request_sample(avctx, "XCh with fewer than 2 base channels");
+ continue;
+ }
+
/* much like core primary audio coding header */
- dca_parse_audio_coding_header(s, s->xch_base_channel);
+ dca_parse_audio_coding_header(s, s->xch_base_channel, 0);
for (i = 0; i < (s->sample_blocks / 8); i++)
if ((ret = dca_decode_block(s, s->xch_base_channel, i))) {
/* usually found either in core or HD part in DTS-HD HRA streams,
* but not in DTS-ES which contains XCh extensions instead */
s->core_ext_mask |= DCA_EXT_XXCH;
+ dca_xxch_decode_frame(s);
break;
case 0x1d95f262: {
full_channels = channels = s->prim_channels + !!s->lfe;
- if (s->amode < 16) {
- avctx->channel_layout = dca_core_channel_layout[s->amode];
-
+ /* If we have XXCH then the channel layout is managed differently */
+ /* note that XLL will also have another way to do things */
+ if (!(s->core_ext_mask & DCA_EXT_XXCH)
+ || (s->core_ext_mask & DCA_EXT_XXCH && avctx->request_channels > 0
+ && avctx->request_channels
+ < num_core_channels + !!s->lfe + s->xxch_chset_nch[0]))
+ { /* xxx should also do MA extensions */
+ if (s->amode < 16) {
+ avctx->channel_layout = dca_core_channel_layout[s->amode];
#if FF_API_REQUEST_CHANNELS
FF_DISABLE_DEPRECATION_WARNINGS
- if (s->xch_present && !s->xch_disable &&
- (!avctx->request_channels ||
- avctx->request_channels > num_core_channels + !!s->lfe)) {
+ if (s->xch_present && !s->xch_disable &&
+ (!avctx->request_channels ||
+ avctx->request_channels > num_core_channels + !!s->lfe)) {
FF_ENABLE_DEPRECATION_WARNINGS
#else
- if (s->xch_present && !s->xch_disable) {
+ if (s->xch_present && !s->xch_disable) {
#endif
- avctx->channel_layout |= AV_CH_BACK_CENTER;
- if (s->lfe) {
- avctx->channel_layout |= AV_CH_LOW_FREQUENCY;
- s->channel_order_tab = dca_channel_reorder_lfe_xch[s->amode];
+ avctx->channel_layout |= AV_CH_BACK_CENTER;
+ if (s->lfe) {
+ avctx->channel_layout |= AV_CH_LOW_FREQUENCY;
+ s->channel_order_tab = dca_channel_reorder_lfe_xch[s->amode];
+ } else {
+ s->channel_order_tab = dca_channel_reorder_nolfe_xch[s->amode];
+ }
+ if (s->channel_order_tab[s->xch_base_channel] < 0)
+ return AVERROR_INVALIDDATA;
} else {
- s->channel_order_tab = dca_channel_reorder_nolfe_xch[s->amode];
+ channels = num_core_channels + !!s->lfe;
+ s->xch_present = 0; /* disable further xch processing */
+ if (s->lfe) {
+ avctx->channel_layout |= AV_CH_LOW_FREQUENCY;
+ s->channel_order_tab = dca_channel_reorder_lfe[s->amode];
+ } else
+ s->channel_order_tab = dca_channel_reorder_nolfe[s->amode];
+ }
+
+ if (channels > !!s->lfe &&
+ s->channel_order_tab[channels - 1 - !!s->lfe] < 0)
+ return AVERROR_INVALIDDATA;
+
+ if (av_get_channel_layout_nb_channels(avctx->channel_layout) != channels) {
+ av_log(avctx, AV_LOG_ERROR, "Number of channels %d mismatches layout %d\n", channels, av_get_channel_layout_nb_channels(avctx->channel_layout));
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (s->prim_channels + !!s->lfe > 2 &&
+ avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) {
+ channels = 2;
+ s->output = s->prim_channels == 2 ? s->amode : DCA_STEREO;
+ avctx->channel_layout = AV_CH_LAYOUT_STEREO;
}
+ else if (avctx->request_channel_layout & AV_CH_LAYOUT_NATIVE) {
+ static const int8_t dca_channel_order_native[9] = { 0, 1, 2, 3, 4, 5, 6, 7, 8 };
+ s->channel_order_tab = dca_channel_order_native;
+ }
+ s->lfe_index = dca_lfe_index[s->amode];
} else {
+ av_log(avctx, AV_LOG_ERROR,
+ "Non standard configuration %d !\n", s->amode);
+ return AVERROR_INVALIDDATA;
+ }
+
+ s->xxch_dmix_embedded = 0;
+ } else {
+ /* we only get here if an XXCH channel set can be added to the mix */
+ channel_mask = s->xxch_core_spkmask;
+
+ if (avctx->request_channels > 0
+ && avctx->request_channels < s->prim_channels) {
channels = num_core_channels + !!s->lfe;
- s->xch_present = 0; /* disable further xch processing */
- if (s->lfe) {
- avctx->channel_layout |= AV_CH_LOW_FREQUENCY;
- s->channel_order_tab = dca_channel_reorder_lfe[s->amode];
- } else
- s->channel_order_tab = dca_channel_reorder_nolfe[s->amode];
+ for (i = 0; i < s->xxch_chset && channels + s->xxch_chset_nch[i]
+ <= avctx->request_channels; i++) {
+ channels += s->xxch_chset_nch[i];
+ channel_mask |= s->xxch_spk_masks[i];
+ }
+ } else {
+ channels = s->prim_channels + !!s->lfe;
+ for (i = 0; i < s->xxch_chset; i++) {
+ channel_mask |= s->xxch_spk_masks[i];
+ }
}
- if (channels > !!s->lfe &&
- s->channel_order_tab[channels - 1 - !!s->lfe] < 0)
- return AVERROR_INVALIDDATA;
+ /* Given the DTS spec'ed channel mask, generate an avcodec version */
+ channel_layout = 0;
+ for (i = 0; i < s->xxch_nbits_spk_mask; ++i) {
+ if (channel_mask & (1 << i)) {
+ channel_layout |= map_xxch_to_native[i];
+ }
+ }
- if (s->prim_channels + !!s->lfe > 2 &&
- avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) {
- channels = 2;
- s->output = s->prim_channels == 2 ? s->amode : DCA_STEREO;
- avctx->channel_layout = AV_CH_LAYOUT_STEREO;
+ /* make sure that we have managed to get equivelant dts/avcodec channel
+ * masks in some sense -- unfortunately some channels could overlap */
+ if (av_popcount(channel_mask) != av_popcount(channel_layout)) {
+ av_log(avctx, AV_LOG_DEBUG,
+ "DTS-XXCH: Inconsistant avcodec/dts channel layouts\n");
+ return AVERROR_INVALIDDATA;
+ }
- /* Stereo downmix coefficients
- *
- * The decoder can only downmix to 2-channel, so we need to ensure
- * embedded downmix coefficients are actually targeting 2-channel.
- */
- if (s->core_downmix && (s->core_downmix_amode == DCA_STEREO ||
- s->core_downmix_amode == DCA_STEREO_TOTAL)) {
- int sign, code;
- for (i = 0; i < s->prim_channels + !!s->lfe; i++) {
- sign = s->core_downmix_codes[i][0] & 0x100 ? 1 : -1;
- code = s->core_downmix_codes[i][0] & 0x0FF;
- s->downmix_coef[i][0] = (!code ? 0.0f :
- sign * dca_dmixtable[code - 1]);
- sign = s->core_downmix_codes[i][1] & 0x100 ? 1 : -1;
- code = s->core_downmix_codes[i][1] & 0x0FF;
- s->downmix_coef[i][1] = (!code ? 0.0f :
- sign * dca_dmixtable[code - 1]);
- }
- s->output = s->core_downmix_amode;
- } else {
- int am = s->amode & DCA_CHANNEL_MASK;
- if (am >= FF_ARRAY_ELEMS(dca_default_coeffs)) {
- av_log(s->avctx, AV_LOG_ERROR,
- "Invalid channel mode %d\n", am);
- return AVERROR_INVALIDDATA;
- }
- if (s->prim_channels + !!s->lfe >
- FF_ARRAY_ELEMS(dca_default_coeffs[0])) {
- avpriv_request_sample(s->avctx, "Downmixing %d channels",
- s->prim_channels + !!s->lfe);
- return AVERROR_PATCHWELCOME;
- }
- for (i = 0; i < s->prim_channels + !!s->lfe; i++) {
- s->downmix_coef[i][0] = dca_default_coeffs[am][i][0];
- s->downmix_coef[i][1] = dca_default_coeffs[am][i][1];
+ avctx->channel_layout = channel_layout;
+
+ if (!(avctx->request_channel_layout & AV_CH_LAYOUT_NATIVE)) {
+ /* Estimate DTS --> avcodec ordering table */
+ for (chset = -1, j = 0; chset < s->xxch_chset; ++chset) {
+ mask = chset >= 0 ? s->xxch_spk_masks[chset]
+ : s->xxch_core_spkmask;
+ for (i = 0; i < s->xxch_nbits_spk_mask; i++) {
+ if (mask & ~(DCA_XXCH_LFE1 | DCA_XXCH_LFE2) & (1 << i)) {
+ lavc = map_xxch_to_native[i];
+ posn = av_popcount(channel_layout & (lavc - 1));
+ s->xxch_order_tab[j++] = posn;
+ }
}
}
- av_dlog(s->avctx, "Stereo downmix coeffs:\n");
- for (i = 0; i < s->prim_channels + !!s->lfe; i++) {
- av_dlog(s->avctx, "L, input channel %d = %f\n", i,
- s->downmix_coef[i][0]);
- av_dlog(s->avctx, "R, input channel %d = %f\n", i,
- s->downmix_coef[i][1]);
- }
- av_dlog(s->avctx, "\n");
+
+ s->lfe_index = av_popcount(channel_layout & (AV_CH_LOW_FREQUENCY-1));
+ } else { /* native ordering */
+ for (i = 0; i < channels; i++)
+ s->xxch_order_tab[i] = i;
+
+ s->lfe_index = channels - 1;
}
- } else {
- av_log(avctx, AV_LOG_ERROR, "Non standard configuration %d !\n", s->amode);
- return AVERROR_INVALIDDATA;
+
+ s->channel_order_tab = s->xxch_order_tab;
+ }
+
+ if (avctx->channels != channels) {
+ if (avctx->channels)
+ av_log(avctx, AV_LOG_INFO, "Number of channels changed in DCA decoder (%d -> %d)\n", avctx->channels, channels);
+ avctx->channels = channels;
}
- avctx->channels = channels;
/* get output buffer */
frame->nb_samples = 256 * (s->sample_blocks / 8);
- if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
- }
samples_flt = (float **)frame->extended_data;
/* allocate buffer for extra channels if downmixing */
s->fdsp.vector_fmac_scalar(lt_chan, back_chan, -M_SQRT1_2, 256);
s->fdsp.vector_fmac_scalar(rt_chan, back_chan, -M_SQRT1_2, 256);
}
+
+ /* If stream contains XXCH, we might need to undo an embedded downmix */
+ if (s->xxch_dmix_embedded) {
+ /* Loop over channel sets in turn */
+ ch = num_core_channels;
+ for (chset = 0; chset < s->xxch_chset; chset++) {
+ endch = ch + s->xxch_chset_nch[chset];
+ mask = s->xxch_dmix_embedded;
+
+ /* undo downmix */
+ for (j = ch; j < endch; j++) {
+ if (mask & (1 << j)) { /* this channel has been mixed-out */
+ src_chan = s->samples_chanptr[s->channel_order_tab[j]];
+ for (k = 0; k < endch; k++) {
+ achan = s->channel_order_tab[k];
+ scale = s->xxch_dmix_coeff[j][k];
+ if (scale != 0.0) {
+ dst_chan = s->samples_chanptr[achan];
+ s->fdsp.vector_fmac_scalar(dst_chan, src_chan,
+ -scale, 256);
+ }
+ }
+ }
+ }
+
+ /* if a downmix has been embedded then undo the pre-scaling */
+ if ((mask & (1 << ch)) && s->xxch_dmix_sf[chset] != 1.0f) {
+ scale = s->xxch_dmix_sf[chset];
+
+ for (j = 0; j < ch; j++) {
+ src_chan = s->samples_chanptr[s->channel_order_tab[j]];
+ for (k = 0; k < 256; k++)
+ src_chan[k] *= scale;
+ }
+
+ /* LFE channel is always part of core, scale if it exists */
+ if (s->lfe) {
+ src_chan = s->samples_chanptr[s->lfe_index];
+ for (k = 0; k < 256; k++)
+ src_chan[k] *= scale;
+ }
+ }
+
+ ch = endch;
+ }
+
+ }
}
/* update lfe history */
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
+ .category = AV_CLASS_CATEGORY_DECODER,
};
AVCodec ff_dca_decoder = {
projects / ffmpeg / blobdiff