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avcodec/mlpenc: remove convoluted incomplete multiple substreams support code

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It is very hard to follow data structures indirections in current code,
so just remove it for now.
pull/365/head
Paul B Mahol 3 years ago
parent e811b0080e
commit b9426f371a
1 changed files with 180 additions and 205 deletions
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  1. 385
      libavcodec/mlpenc.c

385
libavcodec/mlpenc.c
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@ -169,11 +169,11 @@ typedef struct MLPEncodeContext {
BestOffset best_offset[MAJOR_HEADER_INTERVAL+1][MAX_CHANNELS][NUM_CODEBOOKS];
DecodingParams *decoding_params;
RestartHeader restart_header [MAX_SUBSTREAMS];
RestartHeader restart_header;
ChannelParams major_channel_params[MAJOR_HEADER_INTERVAL+1][MAX_CHANNELS]; ///< ChannelParams to be written to bitstream.
DecodingParams major_decoding_params[MAJOR_HEADER_INTERVAL+1][MAX_SUBSTREAMS]; ///< DecodingParams to be written to bitstream.
int major_params_changed[MAJOR_HEADER_INTERVAL+1][MAX_SUBSTREAMS]; ///< params_changed to be written to bitstream.
DecodingParams major_decoding_params[MAJOR_HEADER_INTERVAL+1]; ///< DecodingParams to be written to bitstream.
int major_params_changed[MAJOR_HEADER_INTERVAL+1]; ///< params_changed to be written to bitstream.
unsigned int major_cur_subblock_index;
unsigned int major_filter_state_subblock;
@ -375,11 +375,10 @@ static void copy_matrix_params(MatrixParams *dst, MatrixParams *src)
}
}
static void copy_restart_frame_params(MLPEncodeContext *ctx,
unsigned int substr)
static void copy_restart_frame_params(MLPEncodeContext *ctx)
{
for (unsigned int index = 0; index < ctx->number_of_subblocks; index++) {
DecodingParams *dp = ctx->seq_decoding_params + index*(ctx->num_substreams) + substr;
DecodingParams *dp = ctx->seq_decoding_params + index;
copy_matrix_params(&dp->matrix_params, &ctx->cur_decoding_params->matrix_params);
@ -397,17 +396,15 @@ static void copy_restart_frame_params(MLPEncodeContext *ctx,
}
/** Clears a DecodingParams struct the way it should be after a restart header. */
static void clear_decoding_params(DecodingParams decoding_params[MAX_SUBSTREAMS], int num_substreams)
static void clear_decoding_params(DecodingParams *decoding_params)
{
for (unsigned substr = 0; substr < num_substreams; substr++) {
DecodingParams *dp = &decoding_params[substr];
DecodingParams *dp = decoding_params;
dp->param_presence_flags = 0xff;
dp->blocksize = 8;
dp->param_presence_flags = 0xff;
dp->blocksize = 8;
memset(&dp->matrix_params , 0, sizeof(MatrixParams ));
memset(dp->quant_step_size, 0, sizeof(dp->quant_step_size));
}
memset(&dp->matrix_params , 0, sizeof(MatrixParams ));
memset(dp->quant_step_size, 0, sizeof(dp->quant_step_size));
}
/** Clears a ChannelParams struct the way it should be after a restart header. */
@ -426,26 +423,23 @@ static void clear_channel_params(ChannelParams channel_params[MAX_CHANNELS], int
}
/** Sets default vales in our encoder for a DecodingParams struct. */
static void default_decoding_params(MLPEncodeContext *ctx,
DecodingParams decoding_params[MAX_SUBSTREAMS])
static void default_decoding_params(MLPEncodeContext *ctx, DecodingParams *decoding_params)
{
clear_decoding_params(decoding_params, ctx->num_substreams);
DecodingParams *dp = decoding_params;
uint8_t param_presence_flags = 0;
for (unsigned int substr = 0; substr < ctx->num_substreams; substr++) {
DecodingParams *dp = &decoding_params[substr];
uint8_t param_presence_flags = 0;
param_presence_flags |= PARAM_BLOCKSIZE;
param_presence_flags |= PARAM_MATRIX;
param_presence_flags |= PARAM_OUTSHIFT;
param_presence_flags |= PARAM_QUANTSTEP;
param_presence_flags |= PARAM_FIR;
/* param_presence_flags |= PARAM_IIR; */
param_presence_flags |= PARAM_HUFFOFFSET;
param_presence_flags |= PARAM_PRESENT;
dp->param_presence_flags = param_presence_flags;
}
clear_decoding_params(decoding_params);
param_presence_flags |= PARAM_BLOCKSIZE;
param_presence_flags |= PARAM_MATRIX;
param_presence_flags |= PARAM_OUTSHIFT;
param_presence_flags |= PARAM_QUANTSTEP;
param_presence_flags |= PARAM_FIR;
/*param_presence_flags |= PARAM_IIR; */
param_presence_flags |= PARAM_HUFFOFFSET;
param_presence_flags |= PARAM_PRESENT;
dp->param_presence_flags = param_presence_flags;
}
/****************************************************************************/
@ -475,7 +469,7 @@ static int mlp_peak_bitrate(int peak_bitrate, int sample_rate)
static av_cold void mlp_encode_init_static(void)
{
clear_channel_params (restart_channel_params, MAX_CHANNELS);
clear_decoding_params(restart_decoding_params, MAX_SUBSTREAMS);
clear_decoding_params(restart_decoding_params);
ff_mlp_init_crc();
}
@ -660,7 +654,7 @@ static av_cold int mlp_encode_init(AVCodecContext *avctx)
if (!ctx->max_output_bits)
return AVERROR(ENOMEM);
size = ctx->num_substreams * ctx->max_restart_interval;
size = ctx->max_restart_interval;
ctx->lossless_check_data = av_calloc(size, sizeof(*ctx->lossless_check_data));
if (!ctx->lossless_check_data)
return AVERROR(ENOMEM);
@ -676,22 +670,20 @@ static av_cold int mlp_encode_init(AVCodecContext *avctx)
if (!ctx->channel_params)
return AVERROR(ENOMEM);
size = ctx->restart_intervals * ctx->sequence_size * ctx->num_substreams;
size = ctx->restart_intervals * ctx->sequence_size;
ctx->decoding_params = av_calloc(size, sizeof(*ctx->decoding_params));
if (!ctx->decoding_params)
return AVERROR(ENOMEM);
for (unsigned int substr = 0; substr < ctx->num_substreams; substr++) {
RestartHeader *rh = &ctx->restart_header [substr];
RestartHeader *rh = &ctx->restart_header;
/* TODO see if noisegen_seed is really worth it. */
rh->noisegen_seed = 0;
/* TODO see if noisegen_seed is really worth it. */
rh->noisegen_seed = 0;
rh->min_channel = 0;
rh->max_channel = avctx->channels - 1;
/* FIXME: this works for 1 and 2 channels, but check for more */
rh->max_matrix_channel = rh->max_channel;
}
rh->min_channel = 0;
rh->max_channel = avctx->channels - 1;
/* FIXME: this works for 1 and 2 channels, but check for more */
rh->max_matrix_channel = rh->max_channel;
if ((ret = ff_lpc_init(&ctx->lpc_ctx, ctx->number_of_samples,
MLP_MAX_LPC_ORDER, FF_LPC_TYPE_LEVINSON)) < 0)
@ -1012,93 +1004,89 @@ static void write_block_data(MLPEncodeContext *ctx, PutBitContext *pb)
ctx->write_buffer = sample_buffer;
}
/** Writes the substreams data to the bitstream. */
static uint8_t *write_substrs(MLPEncodeContext *ctx, uint8_t *buf, int buf_size,
int restart_frame,
uint16_t substream_data_len[MAX_SUBSTREAMS])
/** Writes the substream data to the bitstream. */
static uint8_t *write_substr(MLPEncodeContext *ctx, uint8_t *buf, int buf_size,
int restart_frame,
uint16_t substream_data_len[MAX_SUBSTREAMS])
{
int32_t *lossless_check_data = ctx->lossless_check_data;
unsigned int cur_subblock_index = ctx->major_cur_subblock_index;
unsigned int num_subblocks = ctx->major_filter_state_subblock;
RestartHeader *rh = &ctx->restart_header;
int substr_restart_frame = restart_frame;
uint8_t parity, checksum;
PutBitContext pb;
int params_changed;
int end = 0;
lossless_check_data += ctx->frame_index * ctx->num_substreams;
for (unsigned int substr = 0; substr < ctx->num_substreams; substr++) {
unsigned int cur_subblock_index = ctx->major_cur_subblock_index;
unsigned int num_subblocks = ctx->major_filter_state_subblock;
RestartHeader *rh = &ctx->restart_header [substr];
int substr_restart_frame = restart_frame;
uint8_t parity, checksum;
PutBitContext pb;
int params_changed;
lossless_check_data += ctx->frame_index;
ctx->cur_restart_header = rh;
ctx->cur_restart_header = rh;
init_put_bits(&pb, buf, buf_size);
init_put_bits(&pb, buf, buf_size);
for (unsigned int subblock = 0; subblock <= num_subblocks; subblock++) {
unsigned int subblock_index;
for (unsigned int subblock = 0; subblock <= num_subblocks; subblock++) {
unsigned int subblock_index;
subblock_index = cur_subblock_index++;
subblock_index = cur_subblock_index++;
ctx->cur_decoding_params = &ctx->major_decoding_params[subblock_index];
ctx->cur_channel_params = ctx->major_channel_params[subblock_index];
ctx->cur_decoding_params = &ctx->major_decoding_params[subblock_index][substr];
ctx->cur_channel_params = ctx->major_channel_params[subblock_index];
params_changed = ctx->major_params_changed[subblock_index];
params_changed = ctx->major_params_changed[subblock_index][substr];
if (substr_restart_frame || params_changed) {
put_bits(&pb, 1, 1);
if (substr_restart_frame || params_changed) {
if (substr_restart_frame) {
put_bits(&pb, 1, 1);
if (substr_restart_frame) {
put_bits(&pb, 1, 1);
write_restart_header(ctx, &pb);
rh->lossless_check_data = 0;
} else {
put_bits(&pb, 1, 0);
}
write_decoding_params(ctx, &pb, params_changed);
write_restart_header(ctx, &pb);
rh->lossless_check_data = 0;
} else {
put_bits(&pb, 1, 0);
}
write_block_data(ctx, &pb);
write_decoding_params(ctx, &pb, params_changed);
} else {
put_bits(&pb, 1, 0);
}
put_bits(&pb, 1, !substr_restart_frame);
write_block_data(ctx, &pb);
substr_restart_frame = 0;
}
put_bits(&pb, 1, !substr_restart_frame);
put_bits(&pb, (-put_bits_count(&pb)) & 15, 0);
substr_restart_frame = 0;
}
rh->lossless_check_data ^= *lossless_check_data++;
put_bits(&pb, (-put_bits_count(&pb)) & 15, 0);
if (ctx->last_frames == 0 && ctx->shorten_by) {
if (ctx->avctx->codec_id == AV_CODEC_ID_TRUEHD) {
put_bits(&pb, 16, END_OF_STREAM & 0xFFFF);
put_bits(&pb, 16, (ctx->shorten_by & 0x1FFF) | 0x2000);
} else {
put_bits(&pb, 32, END_OF_STREAM);
}
rh->lossless_check_data ^= *lossless_check_data++;
if (ctx->last_frames == 0 && ctx->shorten_by) {
if (ctx->avctx->codec_id == AV_CODEC_ID_TRUEHD) {
put_bits(&pb, 16, END_OF_STREAM & 0xFFFF);
put_bits(&pb, 16, (ctx->shorten_by & 0x1FFF) | 0x2000);
} else {
put_bits(&pb, 32, END_OF_STREAM);
}
}
/* Data must be flushed for the checksum and parity to be correct;
* notice that we already are word-aligned here. */
flush_put_bits(&pb);
/* Data must be flushed for the checksum and parity to be correct;
* notice that we already are word-aligned here. */
flush_put_bits(&pb);
parity = ff_mlp_calculate_parity(buf, put_bytes_output(&pb)) ^ 0xa9;
checksum = ff_mlp_checksum8 (buf, put_bytes_output(&pb));
parity = ff_mlp_calculate_parity(buf, put_bytes_output(&pb)) ^ 0xa9;
checksum = ff_mlp_checksum8 (buf, put_bytes_output(&pb));
put_bits(&pb, 8, parity );
put_bits(&pb, 8, checksum);
put_bits(&pb, 8, parity );
put_bits(&pb, 8, checksum);
flush_put_bits(&pb);
flush_put_bits(&pb);
end += put_bytes_output(&pb);
substream_data_len[substr] = end;
end += put_bytes_output(&pb);
substream_data_len[0] = end;
buf += put_bytes_output(&pb);
}
buf += put_bytes_output(&pb);
ctx->major_cur_subblock_index += ctx->major_filter_state_subblock + 1;
ctx->major_filter_state_subblock = 0;
@ -1110,7 +1098,7 @@ static uint8_t *write_substrs(MLPEncodeContext *ctx, uint8_t *buf, int buf_size,
static void write_frame_headers(MLPEncodeContext *ctx, uint8_t *frame_header,
uint8_t *substream_headers, unsigned int length,
int restart_frame,
uint16_t substream_data_len[MAX_SUBSTREAMS])
uint16_t substream_data_len[1])
{
uint16_t access_unit_header = 0;
uint16_t parity_nibble = 0;
@ -1170,7 +1158,7 @@ static int write_access_unit(MLPEncodeContext *ctx, uint8_t *buf,
buf_size -= 2;
}
buf = write_substrs(ctx, buf, buf_size, restart_frame, substream_data_len);
buf = write_substr(ctx, buf, buf_size, restart_frame, &substream_data_len[0]);
total_length = buf - buf0;
@ -1193,38 +1181,35 @@ static void input_data_internal(MLPEncodeContext *ctx, const uint8_t *samples,
int32_t *lossless_check_data = ctx->lossless_check_data;
const int32_t *samples_32 = (const int32_t *) samples;
const int16_t *samples_16 = (const int16_t *) samples;
RestartHeader *rh = &ctx->restart_header;
int32_t *sample_buffer = ctx->inout_buffer;
int32_t temp_lossless_check_data = 0;
uint32_t greatest = 0;
lossless_check_data += ctx->frame_index * ctx->num_substreams;
lossless_check_data += ctx->frame_index;
for (unsigned int substr = 0; substr < ctx->num_substreams; substr++) {
RestartHeader *rh = &ctx->restart_header [substr];
int32_t *sample_buffer = ctx->inout_buffer;
int32_t temp_lossless_check_data = 0;
uint32_t greatest = 0;
for (int i = 0; i < ctx->avctx->frame_size; i++) {
for (unsigned int channel = 0; channel <= rh->max_channel; channel++) {
uint32_t abs_sample;
int32_t sample;
for (int i = 0; i < ctx->avctx->frame_size; i++) {
for (unsigned int channel = 0; channel <= rh->max_channel; channel++) {
uint32_t abs_sample;
int32_t sample;
sample = is24 ? *samples_32++ >> 8 : *samples_16++ * 256;
sample = is24 ? *samples_32++ >> 8 : *samples_16++ * 256;
/* TODO Find out if number_sbits can be used for negative values. */
abs_sample = FFABS(sample);
if (greatest < abs_sample)
greatest = abs_sample;
temp_lossless_check_data ^= (sample & 0x00ffffff) << channel;
*sample_buffer++ = sample;
}
/* TODO Find out if number_sbits can be used for negative values. */
abs_sample = FFABS(sample);
if (greatest < abs_sample)
greatest = abs_sample;
sample_buffer += 2; /* noise channels */
temp_lossless_check_data ^= (sample & 0x00ffffff) << channel;
*sample_buffer++ = sample;
}
ctx->max_output_bits[ctx->frame_index] = number_sbits(greatest);
*lossless_check_data++ = temp_lossless_check_data;
sample_buffer += 2; /* noise channels */
}
ctx->max_output_bits[ctx->frame_index] = number_sbits(greatest);
*lossless_check_data++ = temp_lossless_check_data;
}
/** Wrapper function for inputting data in two different bit-depths. */
@ -1985,25 +1970,22 @@ static void set_major_params(MLPEncodeContext *ctx)
RestartHeader *rh = ctx->cur_restart_header;
uint8_t max_huff_lsbs = 0;
uint8_t max_output_bits = 0;
for (unsigned int substr = 0; substr < ctx->num_substreams; substr++) {
DecodingParams *seq_dp = (DecodingParams *) ctx->decoding_params+
(ctx->restart_intervals - 1)*(ctx->sequence_size)*(ctx->avctx->channels) +
(ctx->seq_offset[ctx->restart_intervals - 1])*(ctx->avctx->channels);
ChannelParams *seq_cp = (ChannelParams *) ctx->channel_params +
(ctx->restart_intervals - 1)*(ctx->sequence_size)*(ctx->avctx->channels) +
(ctx->seq_offset[ctx->restart_intervals - 1])*(ctx->avctx->channels);
for (unsigned int index = 0; index < ctx->seq_size[ctx->restart_intervals-1]; index++) {
memcpy(&ctx->major_decoding_params[index][substr], seq_dp + index*(ctx->num_substreams) + substr, sizeof(DecodingParams));
for (unsigned int channel = 0; channel < ctx->avctx->channels; channel++) {
uint8_t huff_lsbs = (seq_cp + index*(ctx->avctx->channels) + channel)->huff_lsbs;
if (max_huff_lsbs < huff_lsbs)
max_huff_lsbs = huff_lsbs;
memcpy(&ctx->major_channel_params[index][channel],
(seq_cp + index*(ctx->avctx->channels) + channel),
sizeof(ChannelParams));
}
DecodingParams *seq_dp = (DecodingParams *) ctx->decoding_params+
(ctx->restart_intervals - 1)*(ctx->sequence_size)*(ctx->avctx->channels) +
(ctx->seq_offset[ctx->restart_intervals - 1])*(ctx->avctx->channels);
ChannelParams *seq_cp = (ChannelParams *) ctx->channel_params +
(ctx->restart_intervals - 1)*(ctx->sequence_size)*(ctx->avctx->channels) +
(ctx->seq_offset[ctx->restart_intervals - 1])*(ctx->avctx->channels);
for (unsigned int index = 0; index < ctx->seq_size[ctx->restart_intervals-1]; index++) {
memcpy(&ctx->major_decoding_params[index], seq_dp + index, sizeof(DecodingParams));
for (unsigned int channel = 0; channel < ctx->avctx->channels; channel++) {
uint8_t huff_lsbs = (seq_cp + index*(ctx->avctx->channels) + channel)->huff_lsbs;
if (max_huff_lsbs < huff_lsbs)
max_huff_lsbs = huff_lsbs;
memcpy(&ctx->major_channel_params[index][channel],
(seq_cp + index*(ctx->avctx->channels) + channel),
sizeof(ChannelParams));
}
}
@ -2014,22 +1996,19 @@ static void set_major_params(MLPEncodeContext *ctx)
max_output_bits = ctx->max_output_bits[index];
rh->max_output_bits = max_output_bits;
for (unsigned int substr = 0; substr < ctx->num_substreams; substr++) {
ctx->cur_restart_header = &ctx->restart_header[substr];
ctx->cur_restart_header = &ctx->restart_header;
ctx->prev_decoding_params = &restart_decoding_params[substr];
ctx->prev_channel_params = restart_channel_params;
ctx->prev_decoding_params = restart_decoding_params;
ctx->prev_channel_params = restart_channel_params;
for (unsigned int index = 0; index < MAJOR_HEADER_INTERVAL + 1; index++) {
ctx->cur_decoding_params = &ctx->major_decoding_params[index][substr];
ctx->cur_channel_params = ctx->major_channel_params[index];
for (unsigned int index = 0; index < MAJOR_HEADER_INTERVAL + 1; index++) {
ctx->cur_decoding_params = &ctx->major_decoding_params[index];
ctx->cur_channel_params = ctx->major_channel_params[index];
ctx->major_params_changed[index][substr] = compare_decoding_params(ctx);
ctx->major_params_changed[index] = compare_decoding_params(ctx);
ctx->prev_decoding_params = ctx->cur_decoding_params;
ctx->prev_channel_params = ctx->cur_channel_params;
}
ctx->prev_decoding_params = ctx->cur_decoding_params;
ctx->prev_channel_params = ctx->cur_channel_params;
}
ctx->major_number_of_subblocks = ctx->number_of_subblocks;
@ -2042,44 +2021,42 @@ static void analyze_sample_buffer(MLPEncodeContext *ctx)
ChannelParams *seq_cp = ctx->seq_channel_params;
DecodingParams *seq_dp = ctx->seq_decoding_params;
for (unsigned int substr = 0; substr < ctx->num_substreams; substr++) {
ctx->cur_restart_header = &ctx->restart_header[substr];
ctx->cur_decoding_params = seq_dp + 1*(ctx->num_substreams) + substr;
ctx->cur_channel_params = seq_cp + 1*(ctx->avctx->channels);
determine_quant_step_size(ctx);
generate_2_noise_channels(ctx);
lossless_matrix_coeffs (ctx);
rematrix_channels (ctx);
determine_filters (ctx);
apply_filters (ctx);
copy_restart_frame_params(ctx, substr);
/* Copy frame_size from frames 0...max to decoding_params 1...max + 1
* decoding_params[0] is for the filter state subblock.
*/
for (unsigned int index = 0; index < ctx->number_of_frames; index++) {
DecodingParams *dp = seq_dp + (index + 1)*(ctx->num_substreams) + substr;
dp->blocksize = ctx->avctx->frame_size;
}
/* The official encoder seems to always encode a filter state subblock
* even if there are no filters. TODO check if it is possible to skip
* the filter state subblock for no filters.
*/
(seq_dp + substr)->blocksize = 8;
(seq_dp + 1*(ctx->num_substreams) + substr)->blocksize -= 8;
ctx->cur_restart_header = &ctx->restart_header;
ctx->cur_decoding_params = seq_dp + 1;
ctx->cur_channel_params = seq_cp + ctx->avctx->channels;
for (unsigned int index = 0; index < ctx->number_of_subblocks; index++) {
ctx->cur_decoding_params = seq_dp + index*(ctx->num_substreams) + substr;
ctx->cur_channel_params = seq_cp + index*(ctx->avctx->channels);
ctx->cur_best_offset = ctx->best_offset[index];
determine_bits(ctx);
ctx->sample_buffer += ctx->cur_decoding_params->blocksize * ctx->num_channels;
}
determine_quant_step_size(ctx);
generate_2_noise_channels(ctx);
lossless_matrix_coeffs (ctx);
rematrix_channels (ctx);
determine_filters (ctx);
apply_filters (ctx);
copy_restart_frame_params(ctx);
set_best_codebook(ctx);
/* Copy frame_size from frames 0...max to decoding_params 1...max + 1
* decoding_params[0] is for the filter state subblock.
*/
for (unsigned int index = 0; index < ctx->number_of_frames; index++) {
DecodingParams *dp = seq_dp + (index + 1);
dp->blocksize = ctx->avctx->frame_size;
}
/* The official encoder seems to always encode a filter state subblock
* even if there are no filters. TODO check if it is possible to skip
* the filter state subblock for no filters.
*/
(seq_dp + 0)->blocksize = 8;
(seq_dp + 1)->blocksize -= 8;
for (unsigned int index = 0; index < ctx->number_of_subblocks; index++) {
ctx->cur_decoding_params = seq_dp + index;
ctx->cur_channel_params = seq_cp + index*(ctx->avctx->channels);
ctx->cur_best_offset = ctx->best_offset[index];
determine_bits(ctx);
ctx->sample_buffer += ctx->cur_decoding_params->blocksize * ctx->num_channels;
}
set_best_codebook(ctx);
}
static void process_major_frame(MLPEncodeContext *ctx)
@ -2090,17 +2067,15 @@ static void process_major_frame(MLPEncodeContext *ctx)
ctx->number_of_frames = ctx->major_number_of_frames;
ctx->number_of_samples = ctx->major_frame_size;
for (unsigned int substr = 0; substr < ctx->num_substreams; substr++) {
ctx->cur_restart_header = &ctx->restart_header[substr];
ctx->cur_restart_header = &ctx->restart_header;
ctx->cur_decoding_params = &ctx->major_decoding_params[1][substr];
ctx->cur_channel_params = ctx->major_channel_params[1];
ctx->cur_decoding_params = &ctx->major_decoding_params[1];
ctx->cur_channel_params = ctx->major_channel_params[1];
generate_2_noise_channels(ctx);
rematrix_channels (ctx);
generate_2_noise_channels(ctx);
rematrix_channels (ctx);
apply_filters(ctx);
}
apply_filters(ctx);
}
/****************************************************************************/
@ -2190,15 +2165,15 @@ input_and_return:
(ctx->seq_offset[seq_index])*(ctx->avctx->channels);
ctx->seq_decoding_params = (DecodingParams *) ctx->decoding_params +
(ctx->frame_index / ctx->min_restart_interval)*(ctx->sequence_size)*(ctx->num_substreams) +
(ctx->seq_offset[seq_index])*(ctx->num_substreams);
(ctx->frame_index / ctx->min_restart_interval)*(ctx->sequence_size) +
(ctx->seq_offset[seq_index]);
number_of_samples = avctx->frame_size * ctx->number_of_frames;
ctx->number_of_samples = number_of_samples;
for (unsigned int index = 0; index < ctx->seq_size[seq_index]; index++) {
clear_channel_params(ctx->seq_channel_params + index * ctx->avctx->channels, ctx->avctx->channels);
default_decoding_params(ctx, ctx->seq_decoding_params + index*(ctx->num_substreams));
default_decoding_params(ctx, ctx->seq_decoding_params + index);
}
input_to_sample_buffer(ctx);

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