*/
/**
- * @file mlpdec.c
+ * @file libavcodec/mlpdec.c
* MLP decoder
*/
#include <stdint.h>
#include "avcodec.h"
+#include "dsputil.h"
#include "libavutil/intreadwrite.h"
-#include "bitstream.h"
+#include "get_bits.h"
#include "libavutil/crc.h"
#include "parser.h"
#include "mlp_parser.h"
uint8_t max_channel;
//! The number of channels input into the rematrix stage.
uint8_t max_matrix_channel;
+ //! For each channel output by the matrix, the output channel to map it to
+ uint8_t ch_assign[MAX_CHANNELS];
//! The left shift applied to random noise in 0x31ea substreams.
uint8_t noise_shift;
#define PARAM_FIR (1 << 3)
#define PARAM_IIR (1 << 2)
#define PARAM_HUFFOFFSET (1 << 1)
+#define PARAM_PRESENCE (1 << 0)
//@}
//@{
//! Whether the LSBs of the matrix output are encoded in the bitstream.
uint8_t lsb_bypass[MAX_MATRICES];
//! Matrix coefficients, stored as 2.14 fixed point.
- int32_t matrix_coeff[MAX_MATRICES][MAX_CHANNELS+2];
+ int32_t matrix_coeff[MAX_MATRICES][MAX_CHANNELS];
//! Left shift to apply to noise values in 0x31eb substreams.
uint8_t matrix_noise_shift[MAX_MATRICES];
//@}
typedef struct MLPDecodeContext {
AVCodecContext *avctx;
+ //! Current access unit being read has a major sync.
+ int is_major_sync_unit;
+
//! Set if a valid major sync block has been read. Otherwise no decoding is possible.
uint8_t params_valid;
ChannelParams channel_params[MAX_CHANNELS];
+ int matrix_changed;
+ int filter_changed[MAX_CHANNELS][NUM_FILTERS];
+
int8_t noise_buffer[MAX_BLOCKSIZE_POW2];
int8_t bypassed_lsbs[MAX_BLOCKSIZE][MAX_CHANNELS];
- int32_t sample_buffer[MAX_BLOCKSIZE][MAX_CHANNELS+2];
+ int32_t sample_buffer[MAX_BLOCKSIZE][MAX_CHANNELS];
+
+ DSPContext dsp;
} MLPDecodeContext;
static VLC huff_vlc[3];
m->avctx = avctx;
for (substr = 0; substr < MAX_SUBSTREAMS; substr++)
m->substream[substr].lossless_check_data = 0xffffffff;
+ dsputil_init(&m->dsp, avctx);
return 0;
}
if (mh.num_substreams == 0)
return -1;
+ if (m->avctx->codec_id == CODEC_ID_MLP && mh.num_substreams > 2) {
+ av_log(m->avctx, AV_LOG_ERROR, "MLP only supports up to 2 substreams.\n");
+ return -1;
+ }
if (mh.num_substreams > MAX_SUBSTREAMS) {
av_log(m->avctx, AV_LOG_ERROR,
"Number of substreams %d is larger than the maximum supported "
uint8_t checksum;
uint8_t lossless_check;
int start_count = get_bits_count(gbp);
+ const int max_matrix_channel = m->avctx->codec_id == CODEC_ID_MLP
+ ? MAX_MATRIX_CHANNEL_MLP
+ : MAX_MATRIX_CHANNEL_TRUEHD;
sync_word = get_bits(gbp, 13);
"restart header sync incorrect (got 0x%04x)\n", sync_word);
return -1;
}
+
s->noise_type = get_bits1(gbp);
+ if (m->avctx->codec_id == CODEC_ID_MLP && s->noise_type) {
+ av_log(m->avctx, AV_LOG_ERROR, "MLP must have 0x31ea sync word.\n");
+ return -1;
+ }
+
skip_bits(gbp, 16); /* Output timestamp */
s->min_channel = get_bits(gbp, 4);
s->max_channel = get_bits(gbp, 4);
s->max_matrix_channel = get_bits(gbp, 4);
+ if (s->max_matrix_channel > max_matrix_channel) {
+ av_log(m->avctx, AV_LOG_ERROR,
+ "Max matrix channel cannot be greater than %d.\n",
+ max_matrix_channel);
+ return -1;
+ }
+
+ if (s->max_channel != s->max_matrix_channel) {
+ av_log(m->avctx, AV_LOG_ERROR,
+ "Max channel must be equal max matrix channel.\n");
+ return -1;
+ }
+
+ /* This should happen for TrueHD streams with >6 channels and MLP's noise
+ * type. It is not yet known if this is allowed. */
+ if (s->max_channel > MAX_MATRIX_CHANNEL_MLP && !s->noise_type) {
+ av_log(m->avctx, AV_LOG_ERROR,
+ "Number of channels %d is larger than the maximum supported "
+ "by the decoder. %s\n", s->max_channel+2, sample_message);
+ return -1;
+ }
+
if (s->min_channel > s->max_channel) {
av_log(m->avctx, AV_LOG_ERROR,
"Substream min channel cannot be greater than max channel.\n");
av_log(m->avctx, AV_LOG_WARNING,
"Lossless check failed - expected %02x, calculated %02x.\n",
lossless_check, tmp);
- else
- dprintf(m->avctx, "Lossless check passed for substream %d (%x).\n",
- substr, tmp);
}
skip_bits(gbp, 16);
+ memset(s->ch_assign, 0, sizeof(s->ch_assign));
+
for (ch = 0; ch <= s->max_matrix_channel; ch++) {
int ch_assign = get_bits(gbp, 6);
- dprintf(m->avctx, "ch_assign[%d][%d] = %d\n", substr, ch,
- ch_assign);
- if (ch_assign != ch) {
+ if (ch_assign > s->max_matrix_channel) {
av_log(m->avctx, AV_LOG_ERROR,
- "Non-1:1 channel assignments are used in this stream. %s\n",
- sample_message);
+ "Assignment of matrix channel %d to invalid output channel %d. %s\n",
+ ch, ch_assign, sample_message);
return -1;
}
+ s->ch_assign[ch_assign] = ch;
}
checksum = ff_mlp_restart_checksum(buf, get_bits_count(gbp) - start_count);
cp->huff_lsbs = 24;
}
- if (substr == m->max_decoded_substream) {
- m->avctx->channels = s->max_channel + 1;
- }
+ if (substr == m->max_decoded_substream)
+ m->avctx->channels = s->max_matrix_channel + 1;
return 0;
}
unsigned int channel, unsigned int filter)
{
FilterParams *fp = &m->channel_params[channel].filter_params[filter];
+ const int max_order = filter ? MAX_IIR_ORDER : MAX_FIR_ORDER;
const char fchar = filter ? 'I' : 'F';
int i, order;
// Filter is 0 for FIR, 1 for IIR.
assert(filter < 2);
+ if (m->filter_changed[channel][filter]++ > 1) {
+ av_log(m->avctx, AV_LOG_ERROR, "Filters may change only once per access unit.\n");
+ return -1;
+ }
+
order = get_bits(gbp, 4);
- if (order > MAX_FILTER_ORDER) {
+ if (order > max_order) {
av_log(m->avctx, AV_LOG_ERROR,
"%cIR filter order %d is greater than maximum %d.\n",
- fchar, order, MAX_FILTER_ORDER);
+ fchar, order, max_order);
return -1;
}
fp->order = order;
return 0;
}
+/** Read parameters for primitive matrices. */
+
+static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitContext *gbp)
+{
+ SubStream *s = &m->substream[substr];
+ unsigned int mat, ch;
+ const int max_primitive_matrices = m->avctx->codec_id == CODEC_ID_MLP
+ ? MAX_MATRICES_MLP
+ : MAX_MATRICES_TRUEHD;
+
+ if (m->matrix_changed++ > 1) {
+ av_log(m->avctx, AV_LOG_ERROR, "Matrices may change only once per access unit.\n");
+ return -1;
+ }
+
+ s->num_primitive_matrices = get_bits(gbp, 4);
+
+ if (s->num_primitive_matrices > max_primitive_matrices) {
+ av_log(m->avctx, AV_LOG_ERROR,
+ "Number of primitive matrices cannot be greater than %d.\n",
+ max_primitive_matrices);
+ return -1;
+ }
+
+ for (mat = 0; mat < s->num_primitive_matrices; mat++) {
+ int frac_bits, max_chan;
+ s->matrix_out_ch[mat] = get_bits(gbp, 4);
+ frac_bits = get_bits(gbp, 4);
+ s->lsb_bypass [mat] = get_bits1(gbp);
+
+ if (s->matrix_out_ch[mat] > s->max_matrix_channel) {
+ av_log(m->avctx, AV_LOG_ERROR,
+ "Invalid channel %d specified as output from matrix.\n",
+ s->matrix_out_ch[mat]);
+ return -1;
+ }
+ if (frac_bits > 14) {
+ av_log(m->avctx, AV_LOG_ERROR,
+ "Too many fractional bits specified.\n");
+ return -1;
+ }
+
+ max_chan = s->max_matrix_channel;
+ if (!s->noise_type)
+ max_chan+=2;
+
+ for (ch = 0; ch <= max_chan; ch++) {
+ int coeff_val = 0;
+ if (get_bits1(gbp))
+ coeff_val = get_sbits(gbp, frac_bits + 2);
+
+ s->matrix_coeff[mat][ch] = coeff_val << (14 - frac_bits);
+ }
+
+ if (s->noise_type)
+ s->matrix_noise_shift[mat] = get_bits(gbp, 4);
+ else
+ s->matrix_noise_shift[mat] = 0;
+ }
+
+ return 0;
+}
+
+/** Read channel parameters. */
+
+static int read_channel_params(MLPDecodeContext *m, unsigned int substr,
+ GetBitContext *gbp, unsigned int ch)
+{
+ ChannelParams *cp = &m->channel_params[ch];
+ FilterParams *fir = &cp->filter_params[FIR];
+ FilterParams *iir = &cp->filter_params[IIR];
+ SubStream *s = &m->substream[substr];
+
+ if (s->param_presence_flags & PARAM_FIR)
+ if (get_bits1(gbp))
+ if (read_filter_params(m, gbp, ch, FIR) < 0)
+ return -1;
+
+ if (s->param_presence_flags & PARAM_IIR)
+ if (get_bits1(gbp))
+ if (read_filter_params(m, gbp, ch, IIR) < 0)
+ return -1;
+
+ if (fir->order + iir->order > 8) {
+ av_log(m->avctx, AV_LOG_ERROR, "Total filter orders too high.\n");
+ return -1;
+ }
+
+ if (fir->order && iir->order &&
+ fir->shift != iir->shift) {
+ av_log(m->avctx, AV_LOG_ERROR,
+ "FIR and IIR filters must use the same precision.\n");
+ return -1;
+ }
+ /* The FIR and IIR filters must have the same precision.
+ * To simplify the filtering code, only the precision of the
+ * FIR filter is considered. If only the IIR filter is employed,
+ * the FIR filter precision is set to that of the IIR filter, so
+ * that the filtering code can use it. */
+ if (!fir->order && iir->order)
+ fir->shift = iir->shift;
+
+ if (s->param_presence_flags & PARAM_HUFFOFFSET)
+ if (get_bits1(gbp))
+ cp->huff_offset = get_sbits(gbp, 15);
+
+ cp->codebook = get_bits(gbp, 2);
+ cp->huff_lsbs = get_bits(gbp, 5);
+
+ if (cp->huff_lsbs > 24) {
+ av_log(m->avctx, AV_LOG_ERROR, "Invalid huff_lsbs.\n");
+ return -1;
+ }
+
+ cp->sign_huff_offset = calculate_sign_huff(m, substr, ch);
+
+ return 0;
+}
+
/** Read decoding parameters that change more often than those in the restart
* header. */
unsigned int substr)
{
SubStream *s = &m->substream[substr];
- unsigned int mat, ch;
+ unsigned int ch;
- if (get_bits1(gbp))
- s->param_presence_flags = get_bits(gbp, 8);
+ if (s->param_presence_flags & PARAM_PRESENCE)
+ if (get_bits1(gbp))
+ s->param_presence_flags = get_bits(gbp, 8);
if (s->param_presence_flags & PARAM_BLOCKSIZE)
if (get_bits1(gbp)) {
s->blocksize = get_bits(gbp, 9);
- if (s->blocksize > MAX_BLOCKSIZE) {
- av_log(m->avctx, AV_LOG_ERROR, "block size too large\n");
+ if (s->blocksize < 8 || s->blocksize > m->access_unit_size) {
+ av_log(m->avctx, AV_LOG_ERROR, "Invalid blocksize.");
s->blocksize = 0;
return -1;
}
}
if (s->param_presence_flags & PARAM_MATRIX)
- if (get_bits1(gbp)) {
- s->num_primitive_matrices = get_bits(gbp, 4);
-
- for (mat = 0; mat < s->num_primitive_matrices; mat++) {
- int frac_bits, max_chan;
- s->matrix_out_ch[mat] = get_bits(gbp, 4);
- frac_bits = get_bits(gbp, 4);
- s->lsb_bypass [mat] = get_bits1(gbp);
-
- if (s->matrix_out_ch[mat] > s->max_channel) {
- av_log(m->avctx, AV_LOG_ERROR,
- "Invalid channel %d specified as output from matrix.\n",
- s->matrix_out_ch[mat]);
- return -1;
- }
- if (frac_bits > 14) {
- av_log(m->avctx, AV_LOG_ERROR,
- "Too many fractional bits specified.\n");
- return -1;
- }
-
- max_chan = s->max_matrix_channel;
- if (!s->noise_type)
- max_chan+=2;
-
- for (ch = 0; ch <= max_chan; ch++) {
- int coeff_val = 0;
- if (get_bits1(gbp))
- coeff_val = get_sbits(gbp, frac_bits + 2);
-
- s->matrix_coeff[mat][ch] = coeff_val << (14 - frac_bits);
- }
-
- if (s->noise_type)
- s->matrix_noise_shift[mat] = get_bits(gbp, 4);
- else
- s->matrix_noise_shift[mat] = 0;
- }
- }
+ if (get_bits1(gbp))
+ if (read_matrix_params(m, substr, gbp) < 0)
+ return -1;
if (s->param_presence_flags & PARAM_OUTSHIFT)
if (get_bits1(gbp))
- for (ch = 0; ch <= s->max_matrix_channel; ch++) {
- s->output_shift[ch] = get_bits(gbp, 4);
- dprintf(m->avctx, "output shift[%d] = %d\n",
- ch, s->output_shift[ch]);
- /* TODO: validate */
- }
+ for (ch = 0; ch <= s->max_matrix_channel; ch++)
+ s->output_shift[ch] = get_sbits(gbp, 4);
if (s->param_presence_flags & PARAM_QUANTSTEP)
if (get_bits1(gbp))
ChannelParams *cp = &m->channel_params[ch];
s->quant_step_size[ch] = get_bits(gbp, 4);
- /* TODO: validate */
cp->sign_huff_offset = calculate_sign_huff(m, substr, ch);
}
for (ch = s->min_channel; ch <= s->max_channel; ch++)
- if (get_bits1(gbp)) {
- ChannelParams *cp = &m->channel_params[ch];
- FilterParams *fir = &cp->filter_params[FIR];
- FilterParams *iir = &cp->filter_params[IIR];
-
- if (s->param_presence_flags & PARAM_FIR)
- if (get_bits1(gbp))
- if (read_filter_params(m, gbp, ch, FIR) < 0)
- return -1;
-
- if (s->param_presence_flags & PARAM_IIR)
- if (get_bits1(gbp))
- if (read_filter_params(m, gbp, ch, IIR) < 0)
- return -1;
-
- if (fir->order && iir->order &&
- fir->shift != iir->shift) {
- av_log(m->avctx, AV_LOG_ERROR,
- "FIR and IIR filters must use the same precision.\n");
+ if (get_bits1(gbp))
+ if (read_channel_params(m, substr, gbp, ch) < 0)
return -1;
- }
- /* The FIR and IIR filters must have the same precision.
- * To simplify the filtering code, only the precision of the
- * FIR filter is considered. If only the IIR filter is employed,
- * the FIR filter precision is set to that of the IIR filter, so
- * that the filtering code can use it. */
- if (!fir->order && iir->order)
- fir->shift = iir->shift;
-
- if (s->param_presence_flags & PARAM_HUFFOFFSET)
- if (get_bits1(gbp))
- cp->huff_offset = get_sbits(gbp, 15);
-
- cp->codebook = get_bits(gbp, 2);
- cp->huff_lsbs = get_bits(gbp, 5);
-
- cp->sign_huff_offset = calculate_sign_huff(m, substr, ch);
-
- /* TODO: validate */
- }
return 0;
}
unsigned int channel)
{
SubStream *s = &m->substream[substr];
- int32_t filter_state_buffer[NUM_FILTERS][MAX_BLOCKSIZE + MAX_FILTER_ORDER];
- FilterParams *fp[NUM_FILTERS] = { &m->channel_params[channel].filter_params[FIR],
- &m->channel_params[channel].filter_params[IIR], };
- unsigned int filter_shift = fp[FIR]->shift;
+ int32_t fir_state_buffer[MAX_BLOCKSIZE + MAX_FIR_ORDER];
+ int32_t iir_state_buffer[MAX_BLOCKSIZE + MAX_IIR_ORDER];
+ int32_t *firbuf = fir_state_buffer + MAX_BLOCKSIZE;
+ int32_t *iirbuf = iir_state_buffer + MAX_BLOCKSIZE;
+ FilterParams *fir = &m->channel_params[channel].filter_params[FIR];
+ FilterParams *iir = &m->channel_params[channel].filter_params[IIR];
+ unsigned int filter_shift = fir->shift;
int32_t mask = MSB_MASK(s->quant_step_size[channel]);
- int index = MAX_BLOCKSIZE;
- int j, i;
-
- for (j = 0; j < NUM_FILTERS; j++) {
- memcpy(&filter_state_buffer[j][MAX_BLOCKSIZE], &fp[j]->state[0],
- MAX_FILTER_ORDER * sizeof(int32_t));
- }
-
- for (i = 0; i < s->blocksize; i++) {
- int32_t residual = m->sample_buffer[i + s->blockpos][channel];
- unsigned int order;
- int64_t accum = 0;
- int32_t result;
- /* TODO: Move this code to DSPContext? */
+ memcpy(firbuf, fir->state, MAX_FIR_ORDER * sizeof(int32_t));
+ memcpy(iirbuf, iir->state, MAX_IIR_ORDER * sizeof(int32_t));
- for (j = 0; j < NUM_FILTERS; j++)
- for (order = 0; order < fp[j]->order; order++)
- accum += (int64_t)filter_state_buffer[j][index + order] *
- fp[j]->coeff[order];
+ m->dsp.mlp_filter_channel(firbuf, fir->coeff, fir->order,
+ iirbuf, iir->coeff, iir->order,
+ filter_shift, mask, s->blocksize,
+ &m->sample_buffer[s->blockpos][channel]);
- accum = accum >> filter_shift;
- result = (accum + residual) & mask;
-
- --index;
-
- filter_state_buffer[FIR][index] = result;
- filter_state_buffer[IIR][index] = result - accum;
-
- m->sample_buffer[i + s->blockpos][channel] = result;
- }
-
- for (j = 0; j < NUM_FILTERS; j++) {
- memcpy(&fp[j]->state[0], &filter_state_buffer[j][index],
- MAX_FILTER_ORDER * sizeof(int32_t));
- }
+ memcpy(fir->state, firbuf - s->blocksize, MAX_FIR_ORDER * sizeof(int32_t));
+ memcpy(iir->state, iirbuf - s->blocksize, MAX_IIR_ORDER * sizeof(int32_t));
}
/** Read a block of PCM residual data (or actual if no filtering active). */
memset(&m->bypassed_lsbs[s->blockpos][0], 0,
s->blocksize * sizeof(m->bypassed_lsbs[0]));
- for (i = 0; i < s->blocksize; i++) {
+ for (i = 0; i < s->blocksize; i++)
if (read_huff_channels(m, gbp, substr, i) < 0)
return -1;
- }
- for (ch = s->min_channel; ch <= s->max_channel; ch++) {
+ for (ch = s->min_channel; ch <= s->max_channel; ch++)
filter_channel(m, substr, ch);
- }
s->blockpos += s->blocksize;
int matrix_noise_shift = s->matrix_noise_shift[mat];
unsigned int dest_ch = s->matrix_out_ch[mat];
int32_t mask = MSB_MASK(s->quant_step_size[dest_ch]);
+ int32_t *coeffs = s->matrix_coeff[mat];
+ int index = s->num_primitive_matrices - mat;
+ int index2 = 2 * index + 1;
/* TODO: DSPContext? */
for (i = 0; i < s->blockpos; i++) {
+ int32_t bypassed_lsb = m->bypassed_lsbs[i][mat];
+ int32_t *samples = m->sample_buffer[i];
int64_t accum = 0;
- for (src_ch = 0; src_ch <= maxchan; src_ch++) {
- accum += (int64_t)m->sample_buffer[i][src_ch]
- * s->matrix_coeff[mat][src_ch];
- }
+
+ for (src_ch = 0; src_ch <= maxchan; src_ch++)
+ accum += (int64_t) samples[src_ch] * coeffs[src_ch];
+
if (matrix_noise_shift) {
- uint32_t index = s->num_primitive_matrices - mat;
- index = (i * (index * 2 + 1) + index) & (m->access_unit_size_pow2 - 1);
+ index &= m->access_unit_size_pow2 - 1;
accum += m->noise_buffer[index] << (matrix_noise_shift + 7);
+ index += index2;
}
- m->sample_buffer[i][dest_ch] = ((accum >> 14) & mask)
- + m->bypassed_lsbs[i][mat];
+
+ samples[dest_ch] = ((accum >> 14) & mask) + bypassed_lsb;
}
}
}
uint8_t *data, unsigned int *data_size, int is32)
{
SubStream *s = &m->substream[substr];
- unsigned int i, ch = 0;
+ unsigned int i, out_ch = 0;
int32_t *data_32 = (int32_t*) data;
int16_t *data_16 = (int16_t*) data;
return -1;
for (i = 0; i < s->blockpos; i++) {
- for (ch = 0; ch <= s->max_channel; ch++) {
- int32_t sample = m->sample_buffer[i][ch] << s->output_shift[ch];
- s->lossless_check_data ^= (sample & 0xffffff) << ch;
+ for (out_ch = 0; out_ch <= s->max_matrix_channel; out_ch++) {
+ int mat_ch = s->ch_assign[out_ch];
+ int32_t sample = m->sample_buffer[i][mat_ch]
+ << s->output_shift[mat_ch];
+ s->lossless_check_data ^= (sample & 0xffffff) << mat_ch;
if (is32) *data_32++ = sample << 8;
else *data_16++ = sample >> 8;
}
}
- *data_size = i * ch * (is32 ? 4 : 2);
+ *data_size = i * out_ch * (is32 ? 4 : 2);
return 0;
}
* otherwise returns the number of bytes consumed. */
static int read_access_unit(AVCodecContext *avctx, void* data, int *data_size,
- const uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
MLPDecodeContext *m = avctx->priv_data;
GetBitContext gb;
unsigned int length, substr;
init_get_bits(&gb, (buf + 4), (length - 4) * 8);
+ m->is_major_sync_unit = 0;
if (show_bits_long(&gb, 31) == (0xf8726fba >> 1)) {
- dprintf(m->avctx, "Found major sync.\n");
if (read_major_sync(m, &gb) < 0)
goto error;
+ m->is_major_sync_unit = 1;
header_size += 28;
}
substream_start = 0;
for (substr = 0; substr < m->num_substreams; substr++) {
- int extraword_present, checkdata_present, end;
+ int extraword_present, checkdata_present, end, nonrestart_substr;
extraword_present = get_bits1(&gb);
- skip_bits1(&gb);
+ nonrestart_substr = get_bits1(&gb);
checkdata_present = get_bits1(&gb);
skip_bits1(&gb);
substr_header_size += 2;
if (extraword_present) {
+ if (m->avctx->codec_id == CODEC_ID_MLP) {
+ av_log(m->avctx, AV_LOG_ERROR, "There must be no extraword for MLP.\n");
+ goto error;
+ }
skip_bits(&gb, 16);
substr_header_size += 2;
}
+ if (!(nonrestart_substr ^ m->is_major_sync_unit)) {
+ av_log(m->avctx, AV_LOG_ERROR, "Invalid nonrestart_substr.\n");
+ goto error;
+ }
+
if (end + header_size + substr_header_size > length) {
av_log(m->avctx, AV_LOG_ERROR,
"Indicated length of substream %d data goes off end of "
SubStream *s = &m->substream[substr];
init_get_bits(&gb, buf, substream_data_len[substr] * 8);
+ m->matrix_changed = 0;
+ memset(m->filter_changed, 0, sizeof(m->filter_changed));
+
s->blockpos = 0;
do {
if (get_bits1(&gb)) {
s->restart_seen = 1;
}
- if (!s->restart_seen) {
- av_log(m->avctx, AV_LOG_ERROR,
- "No restart header present in substream %d.\n",
- substr);
+ if (!s->restart_seen)
goto next_substr;
- }
-
if (read_decoding_params(m, &gb, substr) < 0)
goto next_substr;
}
- if (!s->restart_seen) {
- av_log(m->avctx, AV_LOG_ERROR,
- "No restart header present in substream %d.\n",
- substr);
+ if (!s->restart_seen)
goto next_substr;
- }
if (read_block_data(m, &gb, substr) < 0)
return -1;
- } while ((get_bits_count(&gb) < substream_data_len[substr] * 8)
- && get_bits1(&gb) == 0);
+ if (get_bits_count(&gb) >= substream_data_len[substr] * 8)
+ goto substream_length_mismatch;
+
+ } while (!get_bits1(&gb));
skip_bits(&gb, (-get_bits_count(&gb)) & 15);
- if (substream_data_len[substr] * 8 - get_bits_count(&gb) >= 32 &&
- (show_bits_long(&gb, 32) == END_OF_STREAM ||
- show_bits_long(&gb, 20) == 0xd234e)) {
- skip_bits(&gb, 18);
+
+ if (substream_data_len[substr] * 8 - get_bits_count(&gb) >= 32) {
+ int shorten_by;
+
+ if (get_bits(&gb, 16) != 0xD234)
+ return -1;
+
+ shorten_by = get_bits(&gb, 16);
+ if (m->avctx->codec_id == CODEC_ID_TRUEHD && shorten_by & 0x2000)
+ s->blockpos -= FFMIN(shorten_by & 0x1FFF, s->blockpos);
+ else if (m->avctx->codec_id == CODEC_ID_MLP && shorten_by != 0xD234)
+ return -1;
+
if (substr == m->max_decoded_substream)
av_log(m->avctx, AV_LOG_INFO, "End of stream indicated.\n");
-
- if (get_bits1(&gb)) {
- int shorten_by = get_bits(&gb, 13);
- shorten_by = FFMIN(shorten_by, s->blockpos);
- s->blockpos -= shorten_by;
- } else
- skip_bits(&gb, 13);
}
- if (substream_data_len[substr] * 8 - get_bits_count(&gb) >= 16 &&
- substream_parity_present[substr]) {
+
+ if (substream_parity_present[substr]) {
uint8_t parity, checksum;
- parity = ff_mlp_calculate_parity(buf, substream_data_len[substr] - 2);
- if ((parity ^ get_bits(&gb, 8)) != 0xa9)
- av_log(m->avctx, AV_LOG_ERROR,
- "Substream %d parity check failed.\n", substr);
+ if (substream_data_len[substr] * 8 - get_bits_count(&gb) != 16)
+ goto substream_length_mismatch;
- checksum = ff_mlp_checksum8(buf, substream_data_len[substr] - 2);
- if (checksum != get_bits(&gb, 8))
- av_log(m->avctx, AV_LOG_ERROR, "Substream %d checksum failed.\n",
- substr);
- }
- if (substream_data_len[substr] * 8 != get_bits_count(&gb)) {
- av_log(m->avctx, AV_LOG_ERROR, "substream %d length mismatch\n",
- substr);
- return -1;
+ parity = ff_mlp_calculate_parity(buf, substream_data_len[substr] - 2);
+ checksum = ff_mlp_checksum8 (buf, substream_data_len[substr] - 2);
+
+ if ((get_bits(&gb, 8) ^ parity) != 0xa9 )
+ av_log(m->avctx, AV_LOG_ERROR, "Substream %d parity check failed.\n", substr);
+ if ( get_bits(&gb, 8) != checksum)
+ av_log(m->avctx, AV_LOG_ERROR, "Substream %d checksum failed.\n" , substr);
}
+ if (substream_data_len[substr] * 8 != get_bits_count(&gb))
+ goto substream_length_mismatch;
+
next_substr:
+ if (!s->restart_seen)
+ av_log(m->avctx, AV_LOG_ERROR,
+ "No restart header present in substream %d.\n", substr);
+
buf += substream_data_len[substr];
}
return length;
+substream_length_mismatch:
+ av_log(m->avctx, AV_LOG_ERROR, "substream %d length mismatch\n", substr);
+ return -1;
+
error:
m->params_valid = 0;
return -1;
}
+#if CONFIG_MLP_DECODER
AVCodec mlp_decoder = {
"mlp",
CODEC_TYPE_AUDIO,
NULL,
NULL,
read_access_unit,
- .long_name = NULL_IF_CONFIG_SMALL("Meridian Lossless Packing"),
+ .long_name = NULL_IF_CONFIG_SMALL("MLP (Meridian Lossless Packing)"),
};
+#endif /* CONFIG_MLP_DECODER */
+#if CONFIG_TRUEHD_DECODER
+AVCodec truehd_decoder = {
+ "truehd",
+ CODEC_TYPE_AUDIO,
+ CODEC_ID_TRUEHD,
+ sizeof(MLPDecodeContext),
+ mlp_decode_init,
+ NULL,
+ NULL,
+ read_access_unit,
+ .long_name = NULL_IF_CONFIG_SMALL("TrueHD"),
+};
+#endif /* CONFIG_TRUEHD_DECODER */
projects / frescor / ffmpeg.git / blobdiff