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docker: no265

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ed
2026-02-22 14:31:56 +00:00
parent f5e70c7f67
commit 1bec91d11c
22 changed files with 526 additions and 29 deletions
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59
scripts/docker/base/patch/ffmpeg/aac-lc-only.patch Normal file
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@@ -0,0 +1,59 @@
remove all advanced aac features, leaving only aac-lc which is
no longer patent-encumbered in any relevant parts of the world
( and 99% of all aac files are lc-aac anyways so that's fine )
diff --git a/libavcodec/aac/aacdec.c b/libavcodec/aac/aacdec.c
index b8d53036d4..054c46f84e 100644
--- a/libavcodec/aac/aacdec.c
+++ b/libavcodec/aac/aacdec.c
@@ -880,9 +880,7 @@ static int decode_pce(AVCodecContext *avctx, MPEG4AudioConfig *m4ac,
*/
static int decode_ga_specific_config(AACDecContext *ac, AVCodecContext *avctx,
- GetBitContext *gb,
- int get_bit_alignment,
- MPEG4AudioConfig *m4ac,
- int channel_config)
+ GetBitContext *gb, int get_bit_alignment, MPEG4AudioConfig *m4ac, int channel_config)
{
+ if (m4ac->sbr > 0) return AVERROR_DECODER_NOT_FOUND;
int extension_flag, ret, ep_config, res_flags;
uint8_t layout_map[MAX_ELEM_ID*4][3];
@@ -961,8 +959,7 @@ static int decode_ga_specific_config(AACDecContext *ac, AVCodecContext *avctx,
static int decode_eld_specific_config(AACDecContext *ac, AVCodecContext *avctx,
- GetBitContext *gb,
- MPEG4AudioConfig *m4ac,
- int channel_config)
+ GetBitContext *gb, MPEG4AudioConfig *m4ac, int channel_config)
{
+ return AVERROR_DECODER_NOT_FOUND; // kill ELD support
int ret, ep_config, res_flags;
uint8_t layout_map[MAX_ELEM_ID*4][3];
@@ -1070,5 +1067,4 @@ static int decode_audio_specific_config_gb(AACDecContext *ac,
case AOT_AAC_LTP:
case AOT_ER_AAC_LC:
- case AOT_ER_AAC_LD:
if ((ret = decode_ga_specific_config(ac, avctx, gb, get_bit_alignment,
&oc->m4ac, m4ac->chan_config)) < 0)
@@ -1948,4 +1944,5 @@ static int decode_extension_payload(AACDecContext *ac, GetBitContext *gb, int cn
crc_flag++;
case EXT_SBR_DATA:
+ return res; // kill HE/SBR support
if (!che) {
av_log(ac->avctx, AV_LOG_ERROR, "SBR was found before the first channel element.\n");
@@ -2087,4 +2084,5 @@ static void spectral_to_sample(AACDecContext *ac, int samples)
}
if (ac->oc[1].m4ac.sbr > 0) {
+ exit(1); // kill HE/SBR support
ac->proc.sbr_apply(ac, che, type,
che->ch[0].output,
diff --git a/libavcodec/aacsbr_template.c b/libavcodec/aacsbr_template.c
index 31d2d844c4..b55f93752a 100644
--- a/libavcodec/aacsbr_template.c
+++ b/libavcodec/aacsbr_template.c
@@ -639,4 +639,5 @@ static int read_sbr_grid(AACDecContext *ac, SpectralBandReplication *sbr,
GetBitContext *gb, SBRData *ch_data)
{
+ exit(1); // kill SBR support
int i;
int bs_pointer = 0;