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-rw-r--r--libavcodec/mlpdec.c112
1 files changed, 78 insertions, 34 deletions
diff --git a/libavcodec/mlpdec.c b/libavcodec/mlpdec.c
index e0415f5707..d25e78bcf6 100644
--- a/libavcodec/mlpdec.c
+++ b/libavcodec/mlpdec.c
@@ -2,20 +2,20 @@
* MLP decoder
* Copyright (c) 2007-2008 Ian Caulfield
*
- * 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
*/
@@ -141,6 +141,9 @@ typedef struct MLPDecodeContext {
/// 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
@@ -360,6 +363,10 @@ static int read_major_sync(MLPDecodeContext *m, GetBitContext *gb)
m->avctx->sample_fmt = AV_SAMPLE_FMT_S32;
else
m->avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+ m->dsp.mlp_pack_output = m->dsp.mlp_select_pack_output(m->substream[m->max_decoded_substream].ch_assign,
+ m->substream[m->max_decoded_substream].output_shift,
+ m->substream[m->max_decoded_substream].max_matrix_channel,
+ m->avctx->sample_fmt == AV_SAMPLE_FMT_S32);
m->params_valid = 1;
for (substr = 0; substr < MAX_SUBSTREAMS; substr++)
@@ -369,10 +376,22 @@ static int read_major_sync(MLPDecodeContext *m, GetBitContext *gb)
* substream is Stereo. Subsequent substreams' layouts are indicated in the
* major sync. */
if (m->avctx->codec_id == AV_CODEC_ID_MLP) {
+ if (mh.stream_type != 0xbb) {
+ avpriv_request_sample(m->avctx,
+ "unexpected stream_type %X in MLP",
+ mh.stream_type);
+ return AVERROR_PATCHWELCOME;
+ }
if ((substr = (mh.num_substreams > 1)))
m->substream[0].ch_layout = AV_CH_LAYOUT_STEREO;
m->substream[substr].ch_layout = mh.channel_layout_mlp;
} else {
+ if (mh.stream_type != 0xba) {
+ avpriv_request_sample(m->avctx,
+ "unexpected stream_type %X in !MLP",
+ mh.stream_type);
+ return AVERROR_PATCHWELCOME;
+ }
if ((substr = (mh.num_substreams > 1)))
m->substream[0].ch_layout = AV_CH_LAYOUT_STEREO;
if (mh.num_substreams > 2)
@@ -381,8 +400,17 @@ static int read_major_sync(MLPDecodeContext *m, GetBitContext *gb)
else
m->substream[2].ch_layout = mh.channel_layout_thd_stream1;
m->substream[substr].ch_layout = mh.channel_layout_thd_stream1;
+
+ if (m->avctx->channels<=2 && m->substream[substr].ch_layout == AV_CH_LAYOUT_MONO && m->max_decoded_substream == 1) {
+ av_log(m->avctx, AV_LOG_DEBUG, "Mono stream with 2 substreams, ignoring 2nd\n");
+ m->max_decoded_substream = 0;
+ if (m->avctx->channels==2)
+ m->avctx->channel_layout = AV_CH_LAYOUT_STEREO;
+ }
}
+ m->needs_reordering = mh.channel_arrangement >= 18 && mh.channel_arrangement <= 20;
+
/* Parse the TrueHD decoder channel modifiers and set each substream's
* AVMatrixEncoding accordingly.
*
@@ -468,7 +496,7 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp,
if (max_matrix_channel > std_max_matrix_channel) {
av_log(m->avctx, AV_LOG_ERROR,
"Max matrix channel cannot be greater than %d.\n",
- max_matrix_channel);
+ std_max_matrix_channel);
return AVERROR_INVALIDDATA;
}
@@ -480,11 +508,11 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp,
/* 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) {
+ if (max_channel > MAX_MATRIX_CHANNEL_MLP && !s->noise_type) {
avpriv_request_sample(m->avctx,
"%d channels (more than the "
"maximum supported by the decoder)",
- s->max_channel + 2);
+ max_channel + 2);
return AVERROR_PATCHWELCOME;
}
@@ -508,8 +536,8 @@ FF_DISABLE_DEPRECATION_WARNINGS
"Further substreams will be skipped.\n",
s->max_channel + 1, substr);
m->max_decoded_substream = substr;
- } else
FF_ENABLE_DEPRECATION_WARNINGS
+ } else
#endif
if (m->avctx->request_channel_layout && (s->ch_layout & m->avctx->request_channel_layout) ==
m->avctx->request_channel_layout && m->max_decoded_substream > substr) {
@@ -548,7 +576,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
ch_assign = av_get_channel_layout_channel_index(s->ch_layout,
channel);
}
- if (ch_assign > s->max_matrix_channel) {
+ if ((unsigned)ch_assign > s->max_matrix_channel) {
avpriv_request_sample(m->avctx,
"Assignment of matrix channel %d to invalid output channel %d",
ch, ch_assign);
@@ -588,6 +616,24 @@ FF_ENABLE_DEPRECATION_WARNINGS
if (substr == m->max_decoded_substream) {
m->avctx->channels = s->max_matrix_channel + 1;
m->avctx->channel_layout = s->ch_layout;
+ m->dsp.mlp_pack_output = m->dsp.mlp_select_pack_output(s->ch_assign,
+ s->output_shift,
+ s->max_matrix_channel,
+ m->avctx->sample_fmt == AV_SAMPLE_FMT_S32);
+
+ if (m->avctx->codec_id == AV_CODEC_ID_MLP && m->needs_reordering) {
+ if (m->avctx->channel_layout == (AV_CH_LAYOUT_QUAD|AV_CH_LOW_FREQUENCY) ||
+ m->avctx->channel_layout == AV_CH_LAYOUT_5POINT0_BACK) {
+ 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_BACK) {
+ FFSWAP(int, s->ch_assign[2], s->ch_assign[4]);
+ FFSWAP(int, s->ch_assign[3], s->ch_assign[5]);
+ }
+ }
+
}
return 0;
@@ -606,7 +652,7 @@ static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp,
int i, order;
// Filter is 0 for FIR, 1 for IIR.
- assert(filter < 2);
+ av_assert0(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");
@@ -661,7 +707,7 @@ static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp,
/* TODO: Check validity of state data. */
for (i = 0; i < order; i++)
- fp->state[i] = get_sbits(gbp, state_bits) << state_shift;
+ fp->state[i] = state_bits ? get_sbits(gbp, state_bits) << state_shift : 0;
}
}
@@ -780,6 +826,7 @@ static int read_channel_params(MLPDecodeContext *m, unsigned int substr,
if (cp->huff_lsbs > 24) {
av_log(m->avctx, AV_LOG_ERROR, "Invalid huff_lsbs.\n");
+ cp->huff_lsbs = 0;
return AVERROR_INVALIDDATA;
}
@@ -806,7 +853,7 @@ static int read_decoding_params(MLPDecodeContext *m, GetBitContext *gbp,
if (get_bits1(gbp)) {
s->blocksize = get_bits(gbp, 9);
if (s->blocksize < 8 || s->blocksize > m->access_unit_size) {
- av_log(m->avctx, AV_LOG_ERROR, "Invalid blocksize.");
+ av_log(m->avctx, AV_LOG_ERROR, "Invalid blocksize.\n");
s->blocksize = 0;
return AVERROR_INVALIDDATA;
}
@@ -818,9 +865,15 @@ static int read_decoding_params(MLPDecodeContext *m, GetBitContext *gbp,
return ret;
if (s->param_presence_flags & PARAM_OUTSHIFT)
- if (get_bits1(gbp))
+ if (get_bits1(gbp)) {
for (ch = 0; ch <= s->max_matrix_channel; ch++)
s->output_shift[ch] = get_sbits(gbp, 4);
+ if (substr == m->max_decoded_substream)
+ m->dsp.mlp_pack_output = m->dsp.mlp_select_pack_output(s->ch_assign,
+ s->output_shift,
+ s->max_matrix_channel,
+ m->avctx->sample_fmt == AV_SAMPLE_FMT_S32);
+ }
if (s->param_presence_flags & PARAM_QUANTSTEP)
if (get_bits1(gbp))
@@ -1019,9 +1072,6 @@ static int output_data(MLPDecodeContext *m, unsigned int substr,
{
AVCodecContext *avctx = m->avctx;
SubStream *s = &m->substream[substr];
- unsigned int i, out_ch = 0;
- int32_t *data_32;
- int16_t *data_16;
int ret;
int is32 = (m->avctx->sample_fmt == AV_SAMPLE_FMT_S32);
@@ -1037,23 +1087,16 @@ static int output_data(MLPDecodeContext *m, unsigned int substr,
/* get output buffer */
frame->nb_samples = s->blockpos;
- 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;
- }
- data_32 = (int32_t *)frame->data[0];
- data_16 = (int16_t *)frame->data[0];
-
- for (i = 0; i < s->blockpos; i++) {
- 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;
- }
- }
+ s->lossless_check_data = m->dsp.mlp_pack_output(s->lossless_check_data,
+ s->blockpos,
+ m->sample_buffer,
+ frame->data[0],
+ s->ch_assign,
+ s->output_shift,
+ s->max_matrix_channel,
+ is32);
/* Update matrix encoding side data */
if ((ret = ff_side_data_update_matrix_encoding(frame, s->matrix_encoding)) < 0)
@@ -1085,7 +1128,7 @@ static int read_access_unit(AVCodecContext *avctx, void* data,
int ret;
if (buf_size < 4)
- return 0;
+ return AVERROR_INVALIDDATA;
length = (AV_RB16(buf) & 0xfff) * 2;
@@ -1264,6 +1307,7 @@ error:
return AVERROR_INVALIDDATA;
}
+#if CONFIG_MLP_DECODER
AVCodec ff_mlp_decoder = {
.name = "mlp",
.long_name = NULL_IF_CONFIG_SMALL("MLP (Meridian Lossless Packing)"),
@@ -1274,7 +1318,7 @@ AVCodec ff_mlp_decoder = {
.decode = read_access_unit,
.capabilities = CODEC_CAP_DR1,
};
-
+#endif
#if CONFIG_TRUEHD_DECODER
AVCodec ff_truehd_decoder = {
.name = "truehd",
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-07 17:04:06 +0000