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Code Issues Releases Activity

avcodec/mlpenc: add helper function to derive TrueHD ch map from ch_layout

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This commit is contained in:
Paul B Mahol
2023-10-19 22:11:33 +02:00
parent 2d1aeba8f2
commit 94abb4df32
2 changed files with 15 additions and 8 deletions
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12
libavcodec/mlp_parse.h
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@@ -113,6 +113,18 @@ static inline uint64_t truehd_layout(int chanmap)
return layout;
}
static inline int layout_truehd(uint64_t layout)
{
int chanmap = 0;
for (int i = 0; i < 13; i++) {
if ((layout & thd_layout[i]) == thd_layout[i])
chanmap |= 1 << i;
}
return chanmap;
}
int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, GetBitContext *gb);
#endif /* AVCODEC_MLP_PARSE_H */

11
libavcodec/mlpenc.c
View File

@@ -35,6 +35,7 @@
#include "libavutil/opt.h"
#include "libavutil/samplefmt.h"
#include "libavutil/thread.h"
#include "mlp_parse.h"
#include "mlp.h"
#include "lpc.h"
@@ -577,29 +578,21 @@ static av_cold int mlp_encode_init(AVCodecContext *avctx)
ctx->ch2_presentation_mod= 3;
ctx->ch6_presentation_mod= 3;
ctx->ch8_presentation_mod= 3;
ctx->channel_arrangement = 2;
ctx->channel_arrangement8= 2;
ctx->thd_substream_info = 0x14;
} else if (channels_present == AV_CH_LAYOUT_STEREO) {
ctx->ch2_presentation_mod= 1;
ctx->ch6_presentation_mod= 1;
ctx->ch8_presentation_mod= 1;
ctx->channel_arrangement = 1;
ctx->channel_arrangement8= 1;
ctx->thd_substream_info = 0x14;
} else if (channels_present == AV_CH_LAYOUT_5POINT0) {
ctx->ch2_presentation_mod= 1;
ctx->ch6_presentation_mod= 1;
ctx->ch8_presentation_mod= 1;
ctx->channel_arrangement = 11;
ctx->channel_arrangement8= 11;
ctx->thd_substream_info = 0x104;
} else if (channels_present == AV_CH_LAYOUT_5POINT1) {
ctx->ch2_presentation_mod= 2;
ctx->ch6_presentation_mod= 1;
ctx->ch8_presentation_mod= 2;
ctx->channel_arrangement = 15;
ctx->channel_arrangement8= 15;
ctx->thd_substream_info = 0x104;
} else {
av_assert1(!"AVCodec.ch_layouts needs to be updated");
@@ -607,6 +600,8 @@ static av_cold int mlp_encode_init(AVCodecContext *avctx)
ctx->flags = 0;
ctx->channel_occupancy = 0;
ctx->summary_info = 0;
ctx->channel_arrangement =
ctx->channel_arrangement8 = layout_truehd(channels_present);
}
for (unsigned int index = 0; index < ctx->restart_intervals; index++)