[FFmpeg-devel] [PATCH] aacenc: WIP support for PCEs
pkv.stream
pkv.stream at gmail.com
Mon Oct 2 01:52:53 EEST 2017
Le 02/10/2017 à 12:43 AM, Carl Eugen Hoyos a écrit :
> 2017-10-02 0:40 GMT+02:00 pkv.stream <pkv.stream at gmail.com>:
>> Hi atomnuker,
>>
>> got your PCE working;
> the patch you attached contains tabs, they cannot be committed
> to the FFmpeg repository, please remove them.
> (Or one tab.)
thanks for pointing out.
Removed the offending tab.
>
> Thank you, Carl Eugen
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> ffmpeg-devel at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
-------------- next part --------------
From 647fb61708bc1279f9dc17c679052a778dce5fbb Mon Sep 17 00:00:00 2001
From: pkviet <pkv.stream at gmail.com>
Date: Sun, 24 Sep 2017 16:11:17 +0200
Subject: [PATCH] avcodec/aacenc: PCE for all ffmpeg usual layouts
PCE for all usual layouts listed in channel_layout_map
(channel_layout.c) have been added.
All encodes with PCE are decoded correctly by ffmpeg aac decoder (not
checked with others).
The correctness of the channel positions in the encodes have been checked
by splitting the channels to independent audio tracks.
Two non standard layouts have been added in the PCE for support of 9 and
10 channels, which are useful for ambisonics.
For layouts with LFE, the LFE element has been replaced by a SCE because
the encoder always puts the LFE as last channel, irrespective of
config_map and reorder_map. This is not optimal but it enables these
layouts.
---
libavcodec/aacenc.h | 239 ++++++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 233 insertions(+), 6 deletions(-)
diff --git a/libavcodec/aacenc.h b/libavcodec/aacenc.h
index 346d989..31afd04 100644
--- a/libavcodec/aacenc.h
+++ b/libavcodec/aacenc.h
@@ -99,6 +99,33 @@ typedef struct AACPCEInfo {
uint8_t reorder_map[16]; ///< maps channels from lavc to aac order
} AACPCEInfo;
+/**
+ *List of PCE (Program Configuration Element) for the channel layouts listed in channel_layout.h
+ *
+ *For those wishing in the future to add other layouts:
+ * - num_ele: number of elements in each group of front, side, back, lfe channels;
+ * (an element is of type SCE (single channel) , CPE (channel pair) for the first 3 groups;
+ * and is LFE for LFE group).
+ * - pairing: 0 for an SCE element or 1 for a CPE; does not apply to LFE group
+ * - index: there are three independent indices for SCE, CPE and LFE;
+ * they are incremented irrespective of the group to which the element belongs;
+ * they are not reset when going from one group to another
+ *
+ * Example: for 7.0 channel layout,
+ * .pairing = { { 1, 0 }, { 1 }, { 1 }, }, (3 CPE and 1 SCE in front group)
+ * .index = { { 0, 0 }, { 1 }, { 2 }, }, index is 0 for the single SCE
+ * but goes from 0 to 2 for the CPEs .
+ *
+ * The index order impacts the channel ordering. But is otherwise arbitrary
+ * (the sequence could have been 2, 0, 1 instead of 0, 1, 2).
+ * Spec allows discontinuous indices, e.g. if one has a total of two SCE, SCE.0 SCE.15 is OK per spec;
+ * BUT it won't be decoded by ffmpeg aac decoder which at this time requires that indices fully cover some range starting from 0.
+ * (SCE.1 SCE.0 is OK but not SCE.0 SCE.15).
+ *
+ * - config_map: total number of elements and their types. Beware, the way the types are ordered impacts the final channel ordering.
+ * - reorder_map: reorders the channels.
+ *
+ */
static const AACPCEInfo aac_pce_configs[] = {
{
.layout = AV_CH_LAYOUT_MONO,
@@ -117,20 +144,220 @@ static const AACPCEInfo aac_pce_configs[] = {
.reorder_map = { 0, 1 },
},
{
+ .layout = AV_CH_LAYOUT_2POINT1,
+ .num_ele = { 1, 0, 0, 1 },
+ .pairing = { { 1 }, },
+ .index = { { 0 },{ 0 },{ 0 },{ 0 } },
+ .config_map = { 2, TYPE_CPE, TYPE_LFE },
+ .reorder_map = { 0, 1, 2 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_2_1,
+ .num_ele = { 1, 0, 1, 0 },
+ .pairing = { { 1 },{ 0 },{ 0 } },
+ .index = { { 0 },{ 0 },{ 0 }, },
+ .config_map = { 2, TYPE_CPE, TYPE_SCE },
+ .reorder_map = { 0, 1, 2 },
+ },
+ {
.layout = AV_CH_LAYOUT_SURROUND,
.num_ele = { 2, 0, 0, 0 },
.pairing = { { 1, 0 }, },
- .index = { { 0, 1 }, },
- .config_map = { 2, TYPE_SCE, TYPE_CPE },
- .reorder_map = { 2, 0, 1 },
+ .index = { { 0, 0 }, },
+ .config_map = { 2, TYPE_CPE, TYPE_SCE, },
+ .reorder_map = { 0, 1, 2 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_3POINT1,
+ .num_ele = { 2, 0, 0, 1 },
+ .pairing = { { 1, 0 }, },
+ .index = { { 0, 0 }, { 0 }, { 0 }, { 0 }, },
+ .config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_LFE },
+ .reorder_map = { 0, 1, 2, 3 },
},
{
.layout = AV_CH_LAYOUT_4POINT0,
.num_ele = { 2, 0, 1, 0 },
.pairing = { { 1, 0 }, { 0 }, { 0 }, },
- .index = { { 0, 1 }, { 0 }, { 0 } },
- .config_map = { 3, TYPE_SCE, TYPE_CPE, TYPE_SCE },
- .reorder_map = { 2, 0, 1, 3 },
+ .index = { { 0, 0 }, { 0 }, { 1 } },
+ .config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_SCE },
+ .reorder_map = { 0, 1, 2, 3 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_4POINT1,
+ .num_ele = { 2, 1, 1, 0 },
+ .pairing = { { 1, 0 }, { 0 }, { 0 }, },
+ .index = { { 0, 0 }, { 1 }, { 2 }, { 0 } },
+ .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_SCE },
+ .reorder_map = { 0, 1, 2, 3, 4 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_2_2,
+ .num_ele = { 1, 1, 0, 0 },
+ .pairing = { { 1 }, { 1 }, },
+ .index = { { 0 }, { 1 }, },
+ .config_map = { 2, TYPE_CPE, TYPE_CPE },
+ .reorder_map = { 0, 1, 2, 3 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_QUAD,
+ .num_ele = { 1, 0, 1, 0 },
+ .pairing = { { 1 }, { 0 }, { 1 }, },
+ .index = { { 0 }, { 0 }, { 1 } },
+ .config_map = { 2, TYPE_CPE, TYPE_CPE },
+ .reorder_map = { 0, 1, 2, 3 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_5POINT0,
+ .num_ele = { 2, 1, 0, 0 },
+ .pairing = { { 1, 0 }, { 1 }, },
+ .index = { { 0, 0 }, { 1 } },
+ .config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_CPE },
+ .reorder_map = { 0, 1, 2, 3, 4 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_5POINT1,
+ .num_ele = { 2, 1, 1, 0 },
+ .pairing = { { 1, 0 }, { 0 }, { 1 }, },
+ .index = { { 0, 0 }, { 1 }, { 1 } },
+ .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_5POINT0_BACK,
+ .num_ele = { 2, 0, 1, 0 },
+ .pairing = { { 1, 0 }, { 0 }, { 1 } },
+ .index = { { 0, 0 }, { 0 }, { 1 } },
+ .config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_CPE },
+ .reorder_map = { 0, 1, 2, 3, 4 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_5POINT1_BACK,
+ .num_ele = { 2, 1, 1, 0 },
+ .pairing = { { 1, 0 }, { 0 }, { 1 }, },
+ .index = { { 0, 0 }, { 1 }, { 1 } },
+ .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_6POINT0,
+ .num_ele = { 2, 1, 1, 0 },
+ .pairing = { { 1, 0 }, { 1 }, { 0 }, },
+ .index = { { 0, 0 }, { 1 }, { 1 } },
+ .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_6POINT0_FRONT,
+ .num_ele = { 2, 1, 0, 0 },
+ .pairing = { { 1, 1 }, { 1 } },
+ .index = { { 1, 0 }, { 2 }, },
+ .config_map = { 3, TYPE_CPE, TYPE_CPE, TYPE_CPE, },
+ .reorder_map = { 0, 1, 2, 3, 4, 5 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_HEXAGONAL,
+ .num_ele = { 2, 0, 2, 0 },
+ .pairing = { { 1, 0 },{ 0 },{ 1, 0 }, },
+ .index = { { 0, 0 },{ 0 },{ 1, 1 } },
+ .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE, },
+ .reorder_map = { 0, 1, 2, 3, 4, 5 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_6POINT1,
+ .num_ele = { 2, 1, 2, 0 },
+ .pairing = { { 1, 0 },{ 0 },{ 1, 0 }, },
+ .index = { { 0, 0 },{ 1 },{ 1, 2 } },
+ .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_6POINT1_BACK,
+ .num_ele = { 2, 1, 2, 0 },
+ .pairing = { { 1, 0 }, { 0 }, { 1, 0 }, },
+ .index = { { 0, 0 }, { 1 }, { 1, 2 } },
+ .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_6POINT1_FRONT,
+ .num_ele = { 2, 1, 2, 0 },
+ .pairing = { { 1, 0 }, { 0 }, { 1, 0 }, },
+ .index = { { 0, 0 }, { 1 }, { 1, 2 } },
+ .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_7POINT0,
+ .num_ele = { 2, 1, 1, 0 },
+ .pairing = { { 1, 0 }, { 1 }, { 1 }, },
+ .index = { { 0, 0 }, { 1 }, { 2 }, },
+ .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_7POINT0_FRONT,
+ .num_ele = { 2, 1, 1, 0 },
+ .pairing = { { 1, 0 }, { 1 }, { 1 }, },
+ .index = { { 0, 0 }, { 1 }, { 2 }, },
+ .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_7POINT1,
+ .num_ele = { 2, 1, 2, 0 },
+ .pairing = { { 1, 0 }, { 0 }, { 1, 1 }, },
+ .index = { { 0, 0 }, { 1 }, { 1, 2 }, { 0 } },
+ .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_7POINT1_WIDE,
+ .num_ele = { 2, 1, 2, 0 },
+ .pairing = { { 1, 0 }, { 0 },{ 1, 1 }, },
+ .index = { { 0, 0 }, { 1 }, { 1, 2 }, { 0 } },
+ .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_7POINT1_WIDE_BACK,
+ .num_ele = { 2, 1, 2, 0 },
+ .pairing = { { 1, 0 }, { 0 }, { 1, 1 }, },
+ .index = { { 0, 0 }, { 1 }, { 1, 2 }, { 0 } },
+ .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_OCTAGONAL,
+ .num_ele = { 2, 1, 2, 0 },
+ .pairing = { { 1, 0 }, { 1 }, { 1, 0 }, },
+ .index = { { 0, 0 }, { 1 }, { 2, 1 } },
+ .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_SCE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
+ },
+ {
+ .layout = 0x00000f37, //FL+FR+FC+BL+BR+BC+SL+SR+TC
+ .num_ele = { 2, 2, 2, 0 },
+ .pairing = { { 1, 0 }, { 1, 0 }, { 1, 0 }, },
+ .index = { { 0, 0 }, { 1, 1 }, { 2, 2 } },
+ .config_map = { 6, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8 },
+ },
+ {
+ .layout = 0x00000ff3, //FL+FR+BL+BR+FLC+FRC+BC+SL+SR+TC
+ .num_ele = { 2, 2, 2, 0 },
+ .pairing = { { 1, 1 }, { 1, 0 }, { 1, 0 }, },
+ .index = { { 0, 1 }, { 2, 0 }, { 3, 1 } },
+ .config_map = { 6, TYPE_CPE, TYPE_CPE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
+ },
+ {
+ .layout = AV_CH_LAYOUT_HEXADECAGONAL,
+ .num_ele = { 4, 2, 4, 0 },
+ .pairing = { { 1, 0, 1, 0 }, { 1, 1 }, { 1, 0, 1, 0 }, },
+ .index = { { 0, 0, 1, 1 }, { 2, 3 }, { 4, 2, 5, 3 } },
+ .config_map = { 10, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
+ .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
},
};
--
2.10.1.windows.1
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