FFmpeg 7.1 + cuframes input demuxer

Snapshot FFmpeg n7.1 (release tag) с применённым patch'ем для cuframes input format. Используется как FFMPEG_REPO_OVERRIDE в NickM-27/FFmpeg-Builds fork для статической сборки patched binary под Frigate (Debian 12 / glibc 2.36). Apply changes: + libavformat/cuframesdec.c (новый — реализация демуксера) M libavformat/Makefile (CONFIG_CUFRAMES_DEMUXER target) M libavformat/allformats.c (extern declaration) M configure (--enable-libcuframes option + dep check) Patch source: https://git.goldix.org/gx/cuframes (filter/ffmpeg-7.1-cuframes-demuxer.patch) History сброшена (snapshot вместо fork) потому что upstream shallow clone не позволял push в gitea. Полная история FFmpeg — на github.com/FFmpeg/FFmpeg n7.1.
2026-05-17 11:43:10 +01:00
commit dcecd42de4
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+/*
+ * Common AAC and AC-3 parser
+ * Copyright (c) 2003 Fabrice Bellard
+ * Copyright (c) 2003 Michael Niedermayer
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config_components.h"
+
+#include "libavutil/channel_layout.h"
+#include "libavutil/common.h"
+#include "parser.h"
+#include "aac_ac3_parser.h"
+#include "ac3_parser_internal.h"
+#include "adts_header.h"
+
+int ff_aac_ac3_parse(AVCodecParserContext *s1,
+                     AVCodecContext *avctx,
+                     const uint8_t **poutbuf, int *poutbuf_size,
+                     const uint8_t *buf, int buf_size)
+{
+    AACAC3ParseContext *s = s1->priv_data;
+    ParseContext *pc = &s->pc;
+    int len, i;
+    int new_frame_start;
+    int got_frame = 0;
+
+    if (s1->flags & PARSER_FLAG_COMPLETE_FRAMES) {
+        i = buf_size;
+        got_frame = 1;
+    } else {
+get_next:
+        i=END_NOT_FOUND;
+        if(s->remaining_size <= buf_size){
+            if(s->remaining_size && !s->need_next_header){
+                i= s->remaining_size;
+                s->remaining_size = 0;
+            }else{ //we need a header first
+                len=0;
+                for(i=s->remaining_size; i<buf_size; i++){
+                    s->state = (s->state<<8) + buf[i];
+                    if((len=s->sync(s->state, &s->need_next_header, &new_frame_start)))
+                        break;
+                }
+                if(len<=0){
+                    i=END_NOT_FOUND;
+                }else{
+                    got_frame = 1;
+                    s->state=0;
+                    i-= s->header_size -1;
+                    s->remaining_size = len;
+                    if(!new_frame_start || pc->index+i<=0){
+                        s->remaining_size += i;
+                        goto get_next;
+                    }
+                    else if (i < 0) {
+                        s->remaining_size += i;
+                    }
+                }
+            }
+        }
+
+        if(ff_combine_frame(pc, i, &buf, &buf_size)<0){
+            s->remaining_size -= FFMIN(s->remaining_size, buf_size);
+            *poutbuf = NULL;
+            *poutbuf_size = 0;
+            return buf_size;
+        }
+    }
+
+    *poutbuf = buf;
+    *poutbuf_size = buf_size;
+
+    if (got_frame) {
+        int bit_rate;
+
+        /* Due to backwards compatible HE-AAC the sample rate, channel count,
+           and total number of samples found in an AAC ADTS header are not
+           reliable. Bit rate is still accurate because the total frame
+           duration in seconds is still correct (as is the number of bits in
+           the frame). */
+        if (avctx->codec_id != AV_CODEC_ID_AAC) {
+#if CONFIG_AC3_PARSER
+            AC3HeaderInfo hdr, *phrd = &hdr;
+            int offset = ff_ac3_find_syncword(buf, buf_size);
+
+            if (offset < 0)
+                return i;
+
+            buf += offset;
+            buf_size -= offset;
+            while (buf_size > 0) {
+                int ret = avpriv_ac3_parse_header(&phrd, buf, buf_size);
+
+                if (ret < 0 || hdr.frame_size > buf_size)
+                    return i;
+
+                if (buf_size > hdr.frame_size) {
+                    buf += hdr.frame_size;
+                    buf_size -= hdr.frame_size;
+                    continue;
+                }
+                /* Check for false positives since the syncword is not enough.
+                   See section 6.1.2 of A/52. */
+                if (av_crc(s->crc_ctx, 0, buf + 2, hdr.frame_size - 2))
+                    return i;
+                break;
+            }
+
+            avctx->sample_rate = hdr.sample_rate;
+
+            if (hdr.bitstream_id > 10)
+                avctx->codec_id = AV_CODEC_ID_EAC3;
+
+            if (!CONFIG_EAC3_DECODER || avctx->codec_id != AV_CODEC_ID_EAC3) {
+                av_channel_layout_uninit(&avctx->ch_layout);
+                if (hdr.channel_layout) {
+                    av_channel_layout_from_mask(&avctx->ch_layout, hdr.channel_layout);
+                } else {
+                    avctx->ch_layout.order       = AV_CHANNEL_ORDER_UNSPEC;
+                    avctx->ch_layout.nb_channels = hdr.channels;
+                }
+            }
+            s1->duration = hdr.num_blocks * 256;
+            avctx->audio_service_type = hdr.bitstream_mode;
+            if (hdr.bitstream_mode == 0x7 && hdr.channels > 1)
+                avctx->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
+            bit_rate = hdr.bit_rate;
+#endif
+        } else {
+#if CONFIG_AAC_PARSER
+            AACADTSHeaderInfo hdr;
+            if (buf_size < AV_AAC_ADTS_HEADER_SIZE ||
+                ff_adts_header_parse_buf(buf, &hdr) < 0)
+                return i;
+
+            bit_rate = hdr.bit_rate;
+#endif
+        }
+
+        /* Calculate the average bit rate */
+        s->frame_number++;
+        if (!CONFIG_EAC3_DECODER || avctx->codec_id != AV_CODEC_ID_EAC3) {
+            avctx->bit_rate +=
+                (bit_rate - avctx->bit_rate) / s->frame_number;
+        }
+    }
+
+    return i;
+}