*/
/**
- * @file libavcodec/mlpdec.c
+ * @file
* MLP decoder
*/
//! For each channel output by the matrix, the output channel to map it to
uint8_t ch_assign[MAX_CHANNELS];
+ //! Channel coding parameters for channels in the substream
+ ChannelParams channel_params[MAX_CHANNELS];
+
//! The left shift applied to random noise in 0x31ea substreams.
uint8_t noise_shift;
//! The current seed value for the pseudorandom noise generator(s).
//! Index of the last substream to decode - further substreams are skipped.
uint8_t max_decoded_substream;
+ //! Stream needs channel reordering to comply with FFmpeg's channel order
+ uint8_t needs_reordering;
+
//! number of PCM samples contained in each frame
int access_unit_size;
//! next power of two above the number of samples in each frame
SubStream substream[MAX_SUBSTREAMS];
- ChannelParams channel_params[MAX_CHANNELS];
-
int matrix_changed;
int filter_changed[MAX_CHANNELS][NUM_FILTERS];
static inline int32_t calculate_sign_huff(MLPDecodeContext *m,
unsigned int substr, unsigned int ch)
{
- ChannelParams *cp = &m->channel_params[ch];
SubStream *s = &m->substream[substr];
+ ChannelParams *cp = &s->channel_params[ch];
int lsb_bits = cp->huff_lsbs - s->quant_step_size[ch];
int sign_shift = lsb_bits + (cp->codebook ? 2 - cp->codebook : -1);
int32_t sign_huff_offset = cp->huff_offset;
m->bypassed_lsbs[pos + s->blockpos][mat] = get_bits1(gbp);
for (channel = s->min_channel; channel <= s->max_channel; channel++) {
- ChannelParams *cp = &m->channel_params[channel];
+ ChannelParams *cp = &s->channel_params[channel];
int codebook = cp->codebook;
int quant_step_size = s->quant_step_size[channel];
int lsb_bits = cp->huff_lsbs - quant_step_size;
m->avctx->bits_per_raw_sample = mh.group1_bits;
if (mh.group1_bits > 16)
- m->avctx->sample_fmt = SAMPLE_FMT_S32;
+ m->avctx->sample_fmt = AV_SAMPLE_FMT_S32;
else
- m->avctx->sample_fmt = SAMPLE_FMT_S16;
+ m->avctx->sample_fmt = AV_SAMPLE_FMT_S16;
m->params_valid = 1;
for (substr = 0; substr < MAX_SUBSTREAMS; substr++)
m->substream[substr].restart_seen = 0;
+ if (mh.stream_type == 0xbb) {
+ /* MLP stream */
+ m->avctx->channel_layout = ff_mlp_layout[mh.channels_mlp];
+ } else { /* mh.stream_type == 0xba */
+ /* TrueHD stream */
+ if (mh.channels_thd_stream2) {
+ m->avctx->channel_layout = ff_truehd_layout(mh.channels_thd_stream2);
+ } else {
+ m->avctx->channel_layout = ff_truehd_layout(mh.channels_thd_stream1);
+ }
+ if (m->avctx->channels &&
+ av_get_channel_layout_nb_channels(m->avctx->channel_layout) != m->avctx->channels) {
+ m->avctx->channel_layout = 0;
+ av_log_ask_for_sample(m->avctx, "Unknown channel layout.");
+ }
+ }
+
+ m->needs_reordering = mh.channels_mlp >= 18 && mh.channels_mlp <= 20;
+
return 0;
}
if (m->avctx->request_channels > 0
&& s->max_channel + 1 >= m->avctx->request_channels
&& substr < m->max_decoded_substream) {
- av_log(m->avctx, AV_LOG_INFO,
+ av_log(m->avctx, AV_LOG_DEBUG,
"Extracting %d channel downmix from substream %d. "
"Further substreams will be skipped.\n",
s->max_channel + 1, substr);
s->ch_assign[ch_assign] = ch;
}
+ if (m->avctx->codec_id == CODEC_ID_MLP && m->needs_reordering) {
+ if (m->avctx->channel_layout == (AV_CH_LAYOUT_2_2|AV_CH_LOW_FREQUENCY) ||
+ m->avctx->channel_layout == AV_CH_LAYOUT_5POINT0) {
+ int i = s->ch_assign[4];
+ s->ch_assign[4] = s->ch_assign[3];
+ s->ch_assign[3] = s->ch_assign[2];
+ s->ch_assign[2] = i;
+ } else if (m->avctx->channel_layout == AV_CH_LAYOUT_5POINT1) {
+ FFSWAP(int, s->ch_assign[2], s->ch_assign[4]);
+ FFSWAP(int, s->ch_assign[3], s->ch_assign[5]);
+ }
+ }
+ if (m->avctx->codec_id == CODEC_ID_TRUEHD &&
+ m->avctx->channel_layout == AV_CH_LAYOUT_7POINT1) {
+ FFSWAP(int, s->ch_assign[4], s->ch_assign[6]);
+ FFSWAP(int, s->ch_assign[5], s->ch_assign[7]);
+ }
+
checksum = ff_mlp_restart_checksum(buf, get_bits_count(gbp) - start_count);
if (checksum != get_bits(gbp, 8))
memset(s->quant_step_size, 0, sizeof(s->quant_step_size));
for (ch = s->min_channel; ch <= s->max_channel; ch++) {
- ChannelParams *cp = &m->channel_params[ch];
+ ChannelParams *cp = &s->channel_params[ch];
cp->filter_params[FIR].order = 0;
cp->filter_params[IIR].order = 0;
cp->filter_params[FIR].shift = 0;
/** Read parameters for one of the prediction filters. */
static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp,
- unsigned int channel, unsigned int filter)
+ unsigned int substr, unsigned int channel,
+ unsigned int filter)
{
- FilterParams *fp = &m->channel_params[channel].filter_params[filter];
+ SubStream *s = &m->substream[substr];
+ FilterParams *fp = &s->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;
fp->order = order;
if (order > 0) {
- int32_t *fcoeff = m->channel_params[channel].coeff[filter];
+ int32_t *fcoeff = s->channel_params[channel].coeff[filter];
int coeff_bits, coeff_shift;
fp->shift = get_bits(gbp, 4);
static int read_channel_params(MLPDecodeContext *m, unsigned int substr,
GetBitContext *gbp, unsigned int ch)
{
- ChannelParams *cp = &m->channel_params[ch];
+ SubStream *s = &m->substream[substr];
+ ChannelParams *cp = &s->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)
+ if (read_filter_params(m, gbp, substr, 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)
+ if (read_filter_params(m, gbp, substr, ch, IIR) < 0)
return -1;
if (fir->order + iir->order > 8) {
if (s->param_presence_flags & PARAM_QUANTSTEP)
if (get_bits1(gbp))
for (ch = 0; ch <= s->max_channel; ch++) {
- ChannelParams *cp = &m->channel_params[ch];
+ ChannelParams *cp = &s->channel_params[ch];
s->quant_step_size[ch] = get_bits(gbp, 4);
unsigned int channel)
{
SubStream *s = &m->substream[substr];
- const int32_t *fircoeff = m->channel_params[channel].coeff[FIR];
+ const int32_t *fircoeff = s->channel_params[channel].coeff[FIR];
int32_t state_buffer[NUM_FILTERS][MAX_BLOCKSIZE + MAX_FIR_ORDER];
int32_t *firbuf = state_buffer[FIR] + MAX_BLOCKSIZE;
int32_t *iirbuf = state_buffer[IIR] + MAX_BLOCKSIZE;
- FilterParams *fir = &m->channel_params[channel].filter_params[FIR];
- FilterParams *iir = &m->channel_params[channel].filter_params[IIR];
+ FilterParams *fir = &s->channel_params[channel].filter_params[FIR];
+ FilterParams *iir = &s->channel_params[channel].filter_params[IIR];
unsigned int filter_shift = fir->shift;
int32_t mask = MSB_MASK(s->quant_step_size[channel]);
static int output_data(MLPDecodeContext *m, unsigned int substr,
uint8_t *data, unsigned int *data_size)
{
- if (m->avctx->sample_fmt == SAMPLE_FMT_S32)
+ if (m->avctx->sample_fmt == AV_SAMPLE_FMT_S32)
return output_data_internal(m, substr, data, data_size, 1);
else
return output_data_internal(m, substr, data, data_size, 0);
/** Read an access unit from the stream.
- * Returns < 0 on error, 0 if not enough data is present in the input stream
- * otherwise returns the number of bytes consumed. */
+ * @return negative on error, 0 if not enough data is present in the input stream,
+ * otherwise the number of bytes consumed. */
static int read_access_unit(AVCodecContext *avctx, void* data, int *data_size,
AVPacket *avpkt)
length = (AV_RB16(buf) & 0xfff) * 2;
- if (length > buf_size)
+ if (length < 4 || length > buf_size)
return -1;
init_get_bits(&gb, (buf + 4), (length - 4) * 8);
return -1;
}
-#if CONFIG_MLP_DECODER
-AVCodec mlp_decoder = {
+AVCodec ff_mlp_decoder = {
"mlp",
- CODEC_TYPE_AUDIO,
+ AVMEDIA_TYPE_AUDIO,
CODEC_ID_MLP,
sizeof(MLPDecodeContext),
mlp_decode_init,
read_access_unit,
.long_name = NULL_IF_CONFIG_SMALL("MLP (Meridian Lossless Packing)"),
};
-#endif /* CONFIG_MLP_DECODER */
#if CONFIG_TRUEHD_DECODER
-AVCodec truehd_decoder = {
+AVCodec ff_truehd_decoder = {
"truehd",
- CODEC_TYPE_AUDIO,
+ AVMEDIA_TYPE_AUDIO,
CODEC_ID_TRUEHD,
sizeof(MLPDecodeContext),
mlp_decode_init,
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