more than 10 years. It will make for some good tech content.
I will be doing it live, and pre-recorded. It makes for some
very easy ad-hoc live content that I hope helps.
Thanks.
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Thanks for your reply, I will continue to work on some details
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Zhao Zhili wrote:
> > On Oct 27, 2025, at 22:05, xin.guo via ffmpeg-devel
> > wrote:
> > Signed-off-by: xin.guo
> > ---
> > libavcodec/vulkan_h264.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> > diff --git a/libavcodec/vulkan_h264.c b/lib
oblem?
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ff_swb_offset_120 [13];
+extern const uint16_t * const ff_swb_offset_96 [13];
extern const uint8_t ff_tns_max_bands_1024[13];
extern const uint8_t ff_tns_max_bands_512 [13];
--
2.43.0.381.gb435a96ce8
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This commit adds a decoder for the frequency-domain part of USAC.
What works:
- Mono
- Stereo (no prediction)
- Stereo (mid/side coding)
What doesn't:
- Preroll decoding (every single decoder seems faulty or weird?)
- Complex stereo prediction
Known issues:
- Spec incompliance (noise synth
On 16/05/2024 12:26, Andreas Rheinhardt wrote:
Lynne via ffmpeg-devel:
This commit adds a decoder for the frequency-domain part of USAC.
What works:
- Mono
- Stereo (no prediction)
- Stereo (mid/side coding)
What doesn't:
- Preroll decoding (every single decoder seems faulty or
On 16/05/2024 20:30, Michael Niedermayer wrote:
On Thu, May 16, 2024 at 12:08:11PM +0200, Lynne via ffmpeg-devel wrote:
AAC uses an unconventional system to send scalefactors
(the volume+quantization value for each band).
Each window is split into either 1 or 8 blocks (long vs short),
and
ode 100644 libavcodec/aac/aacdec_lpd.c
create mode 100644 libavcodec/aac/aacdec_lpd.h
create mode 100644 libavcodec/aac/aacdec_usac.c
create mode 100644 libavcodec/aac/aacdec_usac.h
--
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+ac->fdsp->vector_fmul_scalar(coef1 + group * 128 +
offsets[sfb],
+ coef0 + group * 128 +
offsets[sfb],
+ scale,
+ offsets[sfb + 1] - offsets[sfb]);
#endif /* USE_FIXED */
-}
-} else {
-int bt_run_end = sce1->band_type_run_end[idx];
-idx += bt_run_end - i;
-i= bt_run_end;
}
}
coef0 += ics->group_len[g] * 128;
--
2.43.0.381.gb435a96ce8
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nnel_config(AACDecContext *ac, AVCodecContext *avctx,
+ uint8_t (*layout_map)[3],
+ int *tags,
+ int channel_config);
+
+int ff_aac_output_configure(AACDecContext *ac,
+ uint8_t la
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ine_window_init_fixed(int *window, int
n)
static av_cold void init_sine_windows_fixed(void)
{
+sine_window_init_fixed(sine_96_fixed, 96);
sine_window_init_fixed(sine_120_fixed, 120);
sine_window_init_fixed(sine_128_fixed, 128);
sine_window_init_fixed(sine_480_fixed, 480);
sine
ff_aac_float_common_init(void);
--
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ff_swb_offset_120 [13];
+extern const uint16_t * const ff_swb_offset_96 [13];
extern const uint8_t ff_tns_max_bands_1024[13];
extern const uint8_t ff_tns_max_bands_512 [13];
--
2.43.0.381.gb435a96ce8
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This commit adds a decoder for the frequency-domain part of USAC.
What works:
- Mono
- Stereo (no prediction)
- Stereo (mid/side coding)
- Stereo (complex prediction)
What's left:
- Speech coding
Known issues:
- Desync with certain sequences
- Preroll crossover missing (shouldn't matter,
On 19/05/2024 21:39, Marton Balint wrote:
On Sun, 19 May 2024, Lynne via ffmpeg-devel wrote:
This commit adds a decoder for the frequency-domain part of USAC.
[...]
+/* Finish later */
+static const enum AVChannel usac_ch_pos_to_av[64] = {
+ [0] = AV_CHAN_FRONT_LEFT,
+ [1
On 20/05/2024 01:19, Michael Niedermayer wrote:
On Sun, May 19, 2024 at 06:54:44PM +0200, Lynne via ffmpeg-devel wrote:
This commit adds a decoder for the frequency-domain part of USAC.
What works:
- Mono
- Stereo (no prediction)
- Stereo (mid/side coding)
- Stereo (complex prediction
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On 21/05/2024 09:18, Paul B Mahol wrote:
On Tue, May 21, 2024 at 4:05 AM Lynne via ffmpeg-devel
mailto:[email protected]>> wrote:
Starting off small with a few features.
Samples and reference decoded files copied from the official ISO
reference suite.
Sorry
lazy for that), and documenting it as "--runs=" and rejecting
anything large enough to overflow.
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PERF_START(t);\
tfunc(__VA_ARGS__);\
tfunc(__VA_ARGS__);\
Tested, works as intended
LGTM, thanks
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n",
bench_runs, av_log2(bench_runs));
+
check_cpu_flag(NULL, 0);
for (i = 0; cpus[i].flag; i++)
check_cpu_flag(cpus[i].name, cpus[i].flag);
--
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On 21/05/2024 17:07, J. Dekker wrote:
Lynne via ffmpeg-devel writes:
Helps make sense of the possible noise in the results.
---
tests/checkasm/checkasm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tests/checkasm/checkasm.c b/tests/checkasm/checkasm.c
index 669f2be9c1
On 21/05/2024 09:16, Marton Balint wrote:
On Sun, 19 May 2024, Lynne via ffmpeg-devel wrote:
On 19/05/2024 21:39, Marton Balint wrote:
On Sun, 19 May 2024, Lynne via ffmpeg-devel wrote:
This commit adds a decoder for the frequency-domain part of USAC.
[...]
+/* Finish later
On 21/05/2024 21:40, Marton Balint wrote:
On Tue, 21 May 2024, Lynne via ffmpeg-devel wrote:
On 21/05/2024 09:16, Marton Balint wrote:
On Sun, 19 May 2024, Lynne via ffmpeg-devel wrote:
On 19/05/2024 21:39, Marton Balint wrote:
On Sun, 19 May 2024, Lynne via ffmpeg-devel wrote
On 21/05/2024 23:33, Hendrik Leppkes wrote:
On Tue, May 21, 2024 at 9:52 PM Lynne via ffmpeg-devel
wrote:
It should be the case here, we shouldn't need reordering as NATIVE just
lets you specify what order the elements appear in the bitstream.
NATIVE means "the FFmpeg native orde
On 22/05/2024 18:17, Philip Langdale via ffmpeg-devel wrote:
On Wed, 22 May 2024 11:10:31 -0400
"Ronald S. Bultje" wrote:
Hi,
On Wed, May 22, 2024 at 10:36 AM Hendrik Leppkes
wrote:
On Thu, Feb 29, 2024 at 7:19 AM llyyr wrote:
segmentation.update_map is never reset to 0 on a
On 22/05/2024 22:15, Marton Balint wrote:
On Wed, 22 May 2024, Lynne via ffmpeg-devel wrote:
On 21/05/2024 23:33, Hendrik Leppkes wrote:
On Tue, May 21, 2024 at 9:52 PM Lynne via ffmpeg-devel
wrote:
It should be the case here, we shouldn't need reordering as NATIVE
just
let
hw_base_encode_get_pictype_name(const
int type) {
Newline missing.
I'm working on integrating this into Vulkan right now, it seems suitable
and saves me a lot of time, thanks for working on it.
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On 24/05/2024 17:39, Wu, Tong1 wrote:
-Original Message-
From: ffmpeg-devel On Behalf Of Lynne
via ffmpeg-devel
Sent: Friday, May 24, 2024 12:11 AM
To: [email protected]
Cc: Lynne
Subject: Re: [FFmpeg-devel] [PATCH v9 01/13] avcodec/vaapi_encode:
introduce a base layer for vaapi
+ac->fdsp->vector_fmul_scalar(coef1 + group * 128 +
offsets[sfb],
+ coef0 + group * 128 +
offsets[sfb],
+ scale,
+ offsets[sfb + 1] - offsets[sfb]);
#endif /* USE_FIXED */
-}
-} else {
-int bt_run_end = sce1->band_type_run_end[idx];
-idx += bt_run_end - i;
-i= bt_run_end;
}
}
coef0 += ics->group_len[g] * 128;
--
2.43.0.381.gb435a96ce8
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--
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nnel_config(AACDecContext *ac, AVCodecContext *avctx,
+ uint8_t (*layout_map)[3],
+ int *tags,
+ int channel_config);
+
+int ff_aac_output_configure(AACDecContext *ac,
+ uint8_t la
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can be safely skipped. */
AV_CHAN_UNUSED = 0x200,
--
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ine_window_init_fixed(int *window, int
n)
static av_cold void init_sine_windows_fixed(void)
{
+sine_window_init_fixed(sine_96_fixed, 96);
sine_window_init_fixed(sine_120_fixed, 120);
sine_window_init_fixed(sine_128_fixed, 128);
sine_window_init_fixed(sine_480_fixed, 480);
sine
ff_aac_float_common_init(void);
--
2.43.0.381.gb435a96ce8
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ff_swb_offset_120 [13];
+extern const uint16_t * const ff_swb_offset_96 [13];
extern const uint8_t ff_tns_max_bands_1024[13];
extern const uint8_t ff_tns_max_bands_512 [13];
--
2.43.0.381.gb435a96ce8
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This commit adds a decoder for the frequency-domain part of USAC.
What works:
- Mono
- Stereo (no prediction)
- Stereo (mid/side coding)
- Stereo (complex prediction)
What's left:
- Speech coding
Known issues:
- Desync with certain sequences
- Preroll crossover missing (shouldn't matter,
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ext (apart from where the function
absolutely must read some data from it)?
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On 25/05/2024 16:18, Sean McGovern wrote:
Hi,
On Sat, May 25, 2024, 09:07 Lynne via ffmpeg-devel
wrote:
On 25/05/2024 12:30, [email protected] wrote:
From: Tong Wu
Related parameters such as device context, frame context are also moved
to base layer.
Signed-off-by: Tong
2;
+
+if (EXTERNAL_FMA3(cpu_flags))
+c->lpc_compute_autocorr = ff_lpc_compute_autocorr_fma3;
if (EXTERNAL_SSE2(cpu_flags))
c->lpc_apply_welch_window = ff_lpc_apply_welch_window_sse2;
--
2.43.0.381.gb435a96ce8
_______
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On 26/05/2024 00:31, James Almer wrote:
On 5/25/2024 5:57 PM, Lynne via ffmpeg-devel wrote:
The inline asm function had issues running under checkasm.
So I came to finish what I started, and wrote the last part
of LPC computation in assembly.
autocorr_10_c: 135525.8
autocorr_10_sse2: 50729.8
On 26/05/2024 00:45, James Almer wrote:
On 5/25/2024 7:31 PM, James Almer wrote:
On 5/25/2024 5:57 PM, Lynne via ffmpeg-devel wrote:
The inline asm function had issues running under checkasm.
So I came to finish what I started, and wrote the last part
of LPC computation in assembly
ompute_autocorr = ff_lpc_compute_autocorr_avx;
if (EXTERNAL_SSE2(cpu_flags))
c->lpc_apply_welch_window = ff_lpc_apply_welch_window_sse2;
--
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On 25/05/2024 08:10, Marton Balint wrote:
On Sat, 25 May 2024, Lynne via ffmpeg-devel wrote:
apichanges will be updated upon merging, as well as a version bump.
---
libavutil/channel_layout.h | 4
1 file changed, 4 insertions(+)
diff --git a/libavutil/channel_layout.h b/libavutil
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OUND_LEFT )
+#define AV_CH_SIDE_SURROUND_RIGHT(1ULL << AV_CHAN_SIDE_SURROUND_RIGHT )
+#define AV_CH_TOP_SURROUND_LEFT (1ULL << AV_CHAN_TOP_SURROUND_LEFT )
+#define AV_CH_TOP_SURROUND_RIGHT (1ULL << AV_CHAN_TOP_SURROUND_RIGHT )
/**
* @}
--
2.43.0.381.gb43
On 26/05/2024 22:51, Marton Balint wrote:
On Sun, 26 May 2024, Lynne via ffmpeg-devel wrote:
On 25/05/2024 08:10, Marton Balint wrote:
On Sat, 25 May 2024, Lynne via ffmpeg-devel wrote:
apichanges will be updated upon merging, as well as a version bump.
---
libavutil
On 27/05/2024 02:35, Wu, Tong1 wrote:
From: ffmpeg-devel On Behalf Of Lynne
via ffmpeg-devel
Sent: Saturday, May 25, 2024 10:07 PM
To: [email protected]
Cc: Lynne
Subject: Re: [FFmpeg-devel] [PATCH v11 07/14] avcodec/vaapi_encode: extract
the init and close function to base layer
On 25
On 27/05/2024 10:40, Anton Khirnov wrote:
Quoting Lynne via ffmpeg-devel (2024-05-26 23:42:41)
...its an enum entry. Do you want a design document and a proposal?
You could talk to the person who did the research about it, JEEB.
Why wait at all? There's only you and JEEB that care about ch
On 27/05/2024 11:07, Anton Khirnov wrote:
Quoting Lynne via ffmpeg-devel (2024-05-27 10:54:40)
On 27/05/2024 10:40, Anton Khirnov wrote:
Quoting Lynne via ffmpeg-devel (2024-05-26 23:42:41)
...its an enum entry. Do you want a design document and a proposal?
You could talk to the person who
'll remember to mark future decoders' flush with av_cold.
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and level are uint8_t like other commented.
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eep(&ctx->codec_picture_params);
-ff_hw_base_encode_close(avctx);
+ff_hw_base_encode_close(base_ctx);
return 0;
}
Err, you missed ff_hw_base_encode_set_output_property,
ff_hw_base_encode_receive_packet and ff_hw_base_init_gop_structure?
Rest looks better.
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On 29/05/2024 00:53, Wu, Tong1 wrote:
From: ffmpeg-devel On Behalf Of Lynne
via ffmpeg-devel
Sent: Wednesday, May 29, 2024 1:08 AM
To: [email protected]
Cc: Lynne
Subject: Re: [FFmpeg-devel] [PATCH v12 15/15] avcodec/hw_base_encode: add
avctx pointer for FFHWBaseEncodeContext
On 28/05
tbeat", OPT_TYPE_BOOL, OPT_VIDEO | OPT_EXPERT |
OPT_PERSTREAM | OPT_OUTPUT,
{ .off = OFFSET(fix_sub_duration_heartbeat) },
"set this video output stream to be a heartbeat stream for "
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Shouldn't this be propagated to the frame's crop fields, and back from
the crop fields to the packet side-data?
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_TOP_SURROUND_LEFT (1ULL << AV_CHAN_TOP_SURROUND_LEFT)
+#define AV_CH_TOP_SURROUND_RIGHT (1ULL << AV_CHAN_TOP_SURROUND_RIGHT )
/**
* @}
--
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+ac->fdsp->vector_fmul_scalar(coef1 + group * 128 +
offsets[sfb],
+ coef0 + group * 128 +
offsets[sfb],
+ scale,
+ offsets[sfb + 1] - offsets[sfb]);
#endif /* USE_FIXED */
-}
-} else {
-int bt_run_end = sce1->band_type_run_end[idx];
-idx += bt_run_end - i;
-i= bt_run_end;
}
}
coef0 += ics->group_len[g] * 128;
--
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nnel_config(AACDecContext *ac, AVCodecContext *avctx,
+ uint8_t (*layout_map)[3],
+ int *tags,
+ int channel_config);
+
+int ff_aac_output_configure(AACDecContext *ac,
+ uint8_t la
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ine_window_init_fixed(int *window, int
n)
static av_cold void init_sine_windows_fixed(void)
{
+sine_window_init_fixed(sine_96_fixed, 96);
sine_window_init_fixed(sine_120_fixed, 120);
sine_window_init_fixed(sine_128_fixed, 128);
sine_window_init_fixed(sine_480_fixed, 480);
sine
ff_aac_float_common_init(void);
--
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ff_swb_offset_120 [13];
+extern const uint16_t * const ff_swb_offset_96 [13];
extern const uint8_t ff_tns_max_bands_1024[13];
extern const uint8_t ff_tns_max_bands_512 [13];
--
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ffmpeg-devel
This commit adds a decoder for the frequency-domain part of USAC.
What works:
- Mono
- Stereo (no prediction)
- Stereo (mid/side coding)
- Stereo (complex prediction)
What's left:
- Speech coding
Known issues:
- Desync with certain sequences
- Preroll crossover missing (shouldn't matter,
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/hwcontext_amf.h
create mode 100644 libavutil/hwcontext_amf_internal.h
Still no answer to my question?
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dundant.
I will have to review it properly at some point.
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On 30/05/2024 03:04, James Almer wrote:
On 5/29/2024 10:01 PM, Lynne via ffmpeg-devel wrote:
On 29/05/2024 23:46, James Almer wrote:
Signed-off-by: James Almer
---
fftools/ffmpeg.h | 7 +++
fftools/ffmpeg_demux.c | 16
fftools/ffmpeg_filter.c | 11
On 31/05/2024 15:39, Jan Ekström wrote:
On Thu, May 30, 2024 at 5:39 AM Lynne via ffmpeg-devel
wrote:
apichanges will be updated upon merging, as well as a version bump.
---
libavutil/channel_layout.c | 4
libavutil/channel_layout.h | 8
2 files changed, 12 insertions
[i])) {
+test_compute_autocorr(len & ~1, lags[i]);
+test_compute_autocorr(len | 1, lags[i]);
+}
+ff_lpc_end(&ctx);
+}
+report("compute_autocorr");
+#endif
}
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On 31/05/2024 20:29, Rémi Denis-Courmont wrote:
Le perjantaina 31. toukokuuta 2024, 21.23.43 EEST Lynne via ffmpeg-devel a
écrit :
Please don't randomize the length in tests. Pick a few lengths to check
all corner cases.
Checkasm tests should be deterministic in how long it takes to run
Germany's
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Patchset pushed.
Thanks for the reviews.
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},
{
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On 02/06/2024 19:13, James Almer wrote:
On 6/2/2024 2:10 PM, Lynne via ffmpeg-devel wrote:
---
doc/APIchanges | 6 ++
libavutil/version.h | 2 +-
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/doc/APIchanges b/doc/APIchanges
index 60f056b863..e36a01336c 100644
--- a
== ((1 << nb2) - 1))
+if (nb3 && (val2 == ((1 << nb2) - 1)))
val += get_bits(gb, nb3);
return val;
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usac->nb_elems);
+return AVERROR(EINVAL);
+}
for (int i = 0; i < usac->nb_elems; i++) {
AACUsacElemConfig *e = &usac->elems[i];
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RROR, "Too many channels for the channel
"
+"configuration\n");
+return AVERROR(EINVAL);
+}
+
av_log(ac->avctx, AV_LOG_DEBUG, "Element present: idx %i, type %i\n",
i, e->type);
--
2.43.0.381.gb435a96c
VERROR(EINVAL);
av_channel_layout_uninit(&ac->oc[1].ch_layout);
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ount(&gb2);
for (i = 0; i < len/2; i++) {
LGTM, tnx
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_MINOR 6
+#define LIBAVCODEC_VERSION_MINOR 7
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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;
#define MAX_PCE_SIZE 320 ///https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
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t;aac_eld", NULL, AUDIO, AV_PROFILE_AAC_ELD)\
+FF_AVCTX_PROFILE_OPTION("aac_xhe", NULL, AUDIO, AV_PROFILE_AAC_USAC)\
FF_AVCTX_PROFILE_OPTION("mpeg2_aac_low", NULL, AUDIO,
AV_PROFILE_MPEG2_AAC_LOW)\
FF_AVCTX_PROFILE_OPTION("mpeg2_aac_he", NULL,
Representation Simple
+AOT_SMR_MAIN = 41, ///< N Symbolic Music
Representation Main
+AOT_USAC = 42, ///< Y Unified Speech and
Audio Coding
+AOT_SAOC = 43, ///< N Spatial Audio
Obj
On 05/06/2024 07:33, Andreas Rheinhardt wrote:
Lynne via ffmpeg-devel:
This allows users to determine whether a stream is USAC or not.
---
libavcodec/aac/aacdec_usac.c | 4
libavcodec/avcodec.h | 1 +
libavcodec/defs.h| 1 +
libavcodec/profiles.c| 1
MAX_CHANNELS 64
-#define MAX_ELEM_ID 16
+#define MAX_ELEM_ID 64
#define TNS_MAX_ORDER 20
#define MAX_LTP_LONG_SFB 40
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To
no = ac->dmono_mode && sce_count == 2 &&
+is_dmono = ac->dmono_mode && elem_id[0] == 2 &&
!av_channel_layout_compare(&ac->oc[1].ch_layout,
&(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO);
if (is_dmono) {
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if (sce->tns.present && ((nb_channels == 1) || (us->tns_on_lr)))
ac->dsp.apply_tns(sce->coeffs, &sce->tns, &sce->ics, 1);
ac->oc[1].m4ac.frame_length_short ?
ac->dsp.imdct_and_windowing_768(ac, sce) :
--
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if ((nb_channels == 1) ||
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;tns_data_present) {
+sce->tns.present = 1;
ret = ff_aac_decode_tns(ac, &sce->tns, gb, ics);
if (ret < 0)
return ret;
--
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