docker: no265

scripts/docker/base/patch/ffmpeg/aac-lc-only.patch

@@ -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;

scripts/docker/base/patch/ffmpeg/libavcodec/aacps.c

@@ -0,0 +1,26 @@
+// just the signatures from the original file; all bodies/logic removed
+
+#include <stdint.h>
+#include "libavutil/common.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/mem_internal.h"
+#include "aacps.h"
+#if USE_FIXED
+#include "aacps_fixed_tablegen.h"
+#else
+#include "libavutil/internal.h"
+#include "aacps_tablegen.h"
+#endif /* USE_FIXED */
+
+static void hybrid_analysis(PSDSPContext *dsp, INTFLOAT out[91][32][2],
+    INTFLOAT in[5][44][2], INTFLOAT L[2][38][64],
+    int is34, int len) {}
+
+static void hybrid_synthesis(PSDSPContext *dsp, INTFLOAT out[2][38][64],
+    INTFLOAT in[91][32][2], int is34, int len) {}
+
+static void decorrelation(PSContext *ps, INTFLOAT (*out)[32][2], const INTFLOAT (*s)[32][2], int is34) {}
+
+int AAC_RENAME(ff_ps_apply)(PSContext *ps, INTFLOAT L[2][38][64], INTFLOAT R[2][38][64], int top) { return 0; }
+
+av_cold void AAC_RENAME(ff_ps_init)(void) {}

scripts/docker/base/patch/ffmpeg/libavcodec/aacsbr.c

@@ -0,0 +1,41 @@
+// just the signatures from the original file; all bodies/logic removed
+
+#define USE_FIXED 0
+
+#include "aac.h"
+#include "sbr.h"
+#include "aacsbr.h"
+#include "aacsbrdata.h"
+#include "aacps.h"
+#include "sbrdsp.h"
+#include "libavutil/internal.h"
+#include "libavutil/intfloat.h"
+#include "libavutil/libm.h"
+#include "libavutil/avassert.h"
+#include "libavutil/mem_internal.h"
+
+#include <stdint.h>
+#include <float.h>
+#include <math.h>
+
+static void aacsbr_func_ptr_init(AACSBRContext *c);
+
+static void make_bands(int16_t* bands, int start, int stop, int num_bands) {}
+
+static void sbr_dequant(SpectralBandReplication *sbr, int id_aac) {}
+
+static void sbr_hf_inverse_filter(SBRDSPContext *dsp,
+    float (*alpha0)[2], float (*alpha1)[2],
+    const float X_low[32][40][2], int k0) {}
+
+static void sbr_chirp(SpectralBandReplication *sbr, SBRData *ch_data) {}
+
+static void sbr_gain_calc(SpectralBandReplication *sbr,
+    SBRData *ch_data, const int e_a[2]) {}
+
+static void sbr_hf_assemble(float Y1[38][64][2],
+    const float X_high[64][40][2],
+    SpectralBandReplication *sbr, SBRData *ch_data,
+    const int e_a[2]) {}
+
+#include "aacsbr_template.c"

scripts/docker/base/patch/ffmpeg/libavcodec/aacsbr_fixed.c

@@ -0,0 +1,45 @@
+// just the signatures from the original file; all bodies/logic removed
+
+#define USE_FIXED 1
+
+#include "aac.h"
+#include "sbr.h"
+#include "aacsbr.h"
+#include "aacsbrdata.h"
+#include "aacps.h"
+#include "sbrdsp.h"
+#include "libavutil/internal.h"
+#include "libavutil/libm.h"
+#include "libavutil/avassert.h"
+
+#include <stdint.h>
+#include <float.h>
+#include <math.h>
+
+static void aacsbr_func_ptr_init(AACSBRContext *c);
+static const int CONST_RECIP_LN2 = Q31(0.7);
+static const int CONST_076923    = Q31(0.7);
+
+static const int fixed_log_table[] = {Q31(0)};
+
+static int fixed_log(int x) {return 1;}
+
+static void make_bands(int16_t* bands, int start, int stop, int num_bands) {}
+
+static void sbr_dequant(SpectralBandReplication *sbr, int id_aac) {}
+
+static void sbr_hf_inverse_filter(SBRDSPContext *dsp,
+    int (*alpha0)[2], int (*alpha1)[2],
+    const int X_low[32][40][2], int k0) {}
+
+static void sbr_chirp(SpectralBandReplication *sbr, SBRData *ch_data) {}
+
+static void sbr_gain_calc(SpectralBandReplication *sbr,
+    SBRData *ch_data, const int e_a[2]) {}
+
+static void sbr_hf_assemble(int Y1[38][64][2],
+    const int X_high[64][40][2],
+    SpectralBandReplication *sbr, SBRData *ch_data,
+    const int e_a[2]) {}
+
+#include "aacsbr_template.c"

scripts/docker/base/patch/ffmpeg/libavcodec/aacsbrdata.h

@@ -0,0 +1,16 @@
+// just the signatures from the original file; all bodies/logic removed
+
+#ifndef AVCODEC_AACSBRDATA_H
+#define AVCODEC_AACSBRDATA_H
+
+#include <stdint.h>
+#include "libavutil/mem_internal.h"
+#include "aac_defines.h"
+
+static const int8_t sbr_offset[6][16] = {};
+
+static const DECLARE_ALIGNED(32, INTFLOAT, sbr_qmf_window_ds)[320] = {};
+
+static const DECLARE_ALIGNED(32, INTFLOAT, sbr_qmf_window_us)[640] = {};
+
+#endif /* AVCODEC_AACSBRDATA_H */