Message ID | 20240506053219.216068-1-marcus@marcusspencer.xyz |
---|---|
State | New |
Headers | show |
Series | [FFmpeg-devel,1/2] avcodec/bsf: add datamosh bitstream filter | expand |
Context | Check | Description |
---|---|---|
andriy/make_x86 | fail | Make failed |
Marcus B Spencer: > Has an option called "target". > > For a positive target, drop the nth keyframe. > For a nonpositive target, allow the first n keyframe(s) and drop the remainder. > > Its primary purpose is for datamoshing, but it can also be used for dropping parts of audio. > > Signed-off-by: Marcus B Spencer <marcus@marcusspencer.xyz> > --- > libavcodec/bitstream_filters.c | 1 + > libavcodec/bsf/Makefile | 1 + > libavcodec/bsf/datamosh.c | 88 ++++++++++++++++++++++++++++++++++ > 3 files changed, 90 insertions(+) > create mode 100644 libavcodec/bsf/datamosh.c > > diff --git a/libavcodec/bitstream_filters.c b/libavcodec/bitstream_filters.c > index 12860c332b..cde6090c77 100644 > --- a/libavcodec/bitstream_filters.c > +++ b/libavcodec/bitstream_filters.c > @@ -29,6 +29,7 @@ extern const FFBitStreamFilter ff_av1_frame_merge_bsf; > extern const FFBitStreamFilter ff_av1_frame_split_bsf; > extern const FFBitStreamFilter ff_av1_metadata_bsf; > extern const FFBitStreamFilter ff_chomp_bsf; > +extern const FFBitStreamFilter ff_datamosh_bsf; > extern const FFBitStreamFilter ff_dump_extradata_bsf; > extern const FFBitStreamFilter ff_dca_core_bsf; > extern const FFBitStreamFilter ff_dts2pts_bsf; > diff --git a/libavcodec/bsf/Makefile b/libavcodec/bsf/Makefile > index fb70ad0c21..ad3b870d12 100644 > --- a/libavcodec/bsf/Makefile > +++ b/libavcodec/bsf/Makefile > @@ -6,6 +6,7 @@ OBJS-$(CONFIG_AV1_FRAME_MERGE_BSF) += bsf/av1_frame_merge.o > OBJS-$(CONFIG_AV1_FRAME_SPLIT_BSF) += bsf/av1_frame_split.o > OBJS-$(CONFIG_AV1_METADATA_BSF) += bsf/av1_metadata.o > OBJS-$(CONFIG_CHOMP_BSF) += bsf/chomp.o > +OBJS-$(CONFIG_DATAMOSH_BSF) += bsf/datamosh.o > OBJS-$(CONFIG_DCA_CORE_BSF) += bsf/dca_core.o > OBJS-$(CONFIG_DTS2PTS_BSF) += bsf/dts2pts.o > OBJS-$(CONFIG_DUMP_EXTRADATA_BSF) += bsf/dump_extradata.o > diff --git a/libavcodec/bsf/datamosh.c b/libavcodec/bsf/datamosh.c > new file mode 100644 > index 0000000000..8314a4efc8 > --- /dev/null > +++ b/libavcodec/bsf/datamosh.c > @@ -0,0 +1,88 @@ > +/* > + * Copyright (c) 2024 Marcus B Spencer <marcus@marcusspencer.xyz> > + * > + * 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 <stdbool.h> > + > +#include "bsf.h" > +#include "bsf_internal.h" > + > +#include "libavutil/opt.h" > + > +typedef struct { > + const AVClass *class; > + > + int target, i; > +} DatamoshContext; > + > +static int datamosh_init(AVBSFContext *ctx) > +{ > + DatamoshContext *s = ctx->priv_data; > + > + s->i = 0; > + > + return 0; > +} > + > +static int datamosh(AVBSFContext *ctx, AVPacket *pkt) > +{ > + DatamoshContext *s = ctx->priv_data; > + bool key; > + int ret; > + > + ret = ff_bsf_get_packet_ref(ctx, pkt); > + if (ret < 0) > + return ret; > + > + key = pkt->flags & AV_PKT_FLAG_KEY; > + if (key) > + ++s->i; > + > + if (s->target < 1) { > + if (s->i <= -s->target) > + return 0; > + else if (key) { > + av_packet_unref(pkt); > + return AVERROR(EAGAIN); > + } > + } > + > + if (key && s->i == s->target) { > + av_packet_unref(pkt); > + return AVERROR(EAGAIN); > + } > + > + return 0; > +} > + > + > +#define OFFSET(x) offsetof(DatamoshContext, x) > +#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_BSF_PARAM) > + > +static const AVOption options[] = { > + { "target", NULL, OFFSET(target), AV_OPT_TYPE_INT, { .i64 = 0 }, -INT_MAX, INT_MAX, FLAGS }, > + { NULL }, > +}; > + > +static const AVClass datamosh_class = { > + .class_name = "datamosh", > + .item_name = av_default_item_name, > + .option = options, > + .version = LIBAVUTIL_VERSION_INT, > +}; 1. This won't compile, as you only add the FFBitStreamFilter in the second patch. 2. Look at the noise bsf. - Andreas
I realized that my git history change failed which intended to retroactively fix issue #1 when the fix got added in the 2nd patch. Be careful when changing git history. On Monday, May 6th, 2024 at 12:47 AM, Andreas Rheinhardt <andreas.rheinhardt@outlook.com> wrote: > > > Marcus B Spencer: > > > Has an option called "target". > > > > For a positive target, drop the nth keyframe. > > For a nonpositive target, allow the first n keyframe(s) and drop the remainder. > > > > Its primary purpose is for datamoshing, but it can also be used for dropping parts of audio. > > > > Signed-off-by: Marcus B Spencer marcus@marcusspencer.xyz > > --- > > libavcodec/bitstream_filters.c | 1 + > > libavcodec/bsf/Makefile | 1 + > > libavcodec/bsf/datamosh.c | 88 ++++++++++++++++++++++++++++++++++ > > 3 files changed, 90 insertions(+) > > create mode 100644 libavcodec/bsf/datamosh.c > > > > diff --git a/libavcodec/bitstream_filters.c b/libavcodec/bitstream_filters.c > > index 12860c332b..cde6090c77 100644 > > --- a/libavcodec/bitstream_filters.c > > +++ b/libavcodec/bitstream_filters.c > > @@ -29,6 +29,7 @@ extern const FFBitStreamFilter ff_av1_frame_merge_bsf; > > extern const FFBitStreamFilter ff_av1_frame_split_bsf; > > extern const FFBitStreamFilter ff_av1_metadata_bsf; > > extern const FFBitStreamFilter ff_chomp_bsf; > > +extern const FFBitStreamFilter ff_datamosh_bsf; > > extern const FFBitStreamFilter ff_dump_extradata_bsf; > > extern const FFBitStreamFilter ff_dca_core_bsf; > > extern const FFBitStreamFilter ff_dts2pts_bsf; > > diff --git a/libavcodec/bsf/Makefile b/libavcodec/bsf/Makefile > > index fb70ad0c21..ad3b870d12 100644 > > --- a/libavcodec/bsf/Makefile > > +++ b/libavcodec/bsf/Makefile > > @@ -6,6 +6,7 @@ OBJS-$(CONFIG_AV1_FRAME_MERGE_BSF) += bsf/av1_frame_merge.o > > OBJS-$(CONFIG_AV1_FRAME_SPLIT_BSF) += bsf/av1_frame_split.o > > OBJS-$(CONFIG_AV1_METADATA_BSF) += bsf/av1_metadata.o > > OBJS-$(CONFIG_CHOMP_BSF) += bsf/chomp.o > > +OBJS-$(CONFIG_DATAMOSH_BSF) += bsf/datamosh.o > > OBJS-$(CONFIG_DCA_CORE_BSF) += bsf/dca_core.o > > OBJS-$(CONFIG_DTS2PTS_BSF) += bsf/dts2pts.o > > OBJS-$(CONFIG_DUMP_EXTRADATA_BSF) += bsf/dump_extradata.o > > diff --git a/libavcodec/bsf/datamosh.c b/libavcodec/bsf/datamosh.c > > new file mode 100644 > > index 0000000000..8314a4efc8 > > --- /dev/null > > +++ b/libavcodec/bsf/datamosh.c > > @@ -0,0 +1,88 @@ > > +/* > > + * Copyright (c) 2024 Marcus B Spencer marcus@marcusspencer.xyz > > + * > > + * 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 <stdbool.h> > > + > > +#include "bsf.h" > > +#include "bsf_internal.h" > > + > > +#include "libavutil/opt.h" > > + > > +typedef struct { > > + const AVClass *class; > > + > > + int target, i; > > +} DatamoshContext; > > + > > +static int datamosh_init(AVBSFContext *ctx) > > +{ > > + DatamoshContext *s = ctx->priv_data; > > + > > + s->i = 0; > > + > > + return 0; > > +} > > + > > +static int datamosh(AVBSFContext *ctx, AVPacket *pkt) > > +{ > > + DatamoshContext *s = ctx->priv_data; > > + bool key; > > + int ret; > > + > > + ret = ff_bsf_get_packet_ref(ctx, pkt); > > + if (ret < 0) > > + return ret; > > + > > + key = pkt->flags & AV_PKT_FLAG_KEY; > > + if (key) > > + ++s->i; > > + > > + if (s->target < 1) { > > + if (s->i <= -s->target) > > + return 0; > > + else if (key) { > > + av_packet_unref(pkt); > > + return AVERROR(EAGAIN); > > + } > > + } > > + > > + if (key && s->i == s->target) { > > + av_packet_unref(pkt); > > + return AVERROR(EAGAIN); > > + } > > + > > + return 0; > > +} > > + > > + > > +#define OFFSET(x) offsetof(DatamoshContext, x) > > +#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_BSF_PARAM) > > + > > +static const AVOption options[] = { > > + { "target", NULL, OFFSET(target), AV_OPT_TYPE_INT, { .i64 = 0 }, -INT_MAX, INT_MAX, FLAGS }, > > + { NULL }, > > +}; > > + > > +static const AVClass datamosh_class = { > > + .class_name = "datamosh", > > + .item_name = av_default_item_name, > > + .option = options, > > + .version = LIBAVUTIL_VERSION_INT, > > +}; > > > 1. This won't compile, as you only add the FFBitStreamFilter in the > second patch. > 2. Look at the noise bsf. > > - Andreas > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
diff --git a/libavcodec/bitstream_filters.c b/libavcodec/bitstream_filters.c index 12860c332b..cde6090c77 100644 --- a/libavcodec/bitstream_filters.c +++ b/libavcodec/bitstream_filters.c @@ -29,6 +29,7 @@ extern const FFBitStreamFilter ff_av1_frame_merge_bsf; extern const FFBitStreamFilter ff_av1_frame_split_bsf; extern const FFBitStreamFilter ff_av1_metadata_bsf; extern const FFBitStreamFilter ff_chomp_bsf; +extern const FFBitStreamFilter ff_datamosh_bsf; extern const FFBitStreamFilter ff_dump_extradata_bsf; extern const FFBitStreamFilter ff_dca_core_bsf; extern const FFBitStreamFilter ff_dts2pts_bsf; diff --git a/libavcodec/bsf/Makefile b/libavcodec/bsf/Makefile index fb70ad0c21..ad3b870d12 100644 --- a/libavcodec/bsf/Makefile +++ b/libavcodec/bsf/Makefile @@ -6,6 +6,7 @@ OBJS-$(CONFIG_AV1_FRAME_MERGE_BSF) += bsf/av1_frame_merge.o OBJS-$(CONFIG_AV1_FRAME_SPLIT_BSF) += bsf/av1_frame_split.o OBJS-$(CONFIG_AV1_METADATA_BSF) += bsf/av1_metadata.o OBJS-$(CONFIG_CHOMP_BSF) += bsf/chomp.o +OBJS-$(CONFIG_DATAMOSH_BSF) += bsf/datamosh.o OBJS-$(CONFIG_DCA_CORE_BSF) += bsf/dca_core.o OBJS-$(CONFIG_DTS2PTS_BSF) += bsf/dts2pts.o OBJS-$(CONFIG_DUMP_EXTRADATA_BSF) += bsf/dump_extradata.o diff --git a/libavcodec/bsf/datamosh.c b/libavcodec/bsf/datamosh.c new file mode 100644 index 0000000000..8314a4efc8 --- /dev/null +++ b/libavcodec/bsf/datamosh.c @@ -0,0 +1,88 @@ +/* + * Copyright (c) 2024 Marcus B Spencer <marcus@marcusspencer.xyz> + * + * 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 <stdbool.h> + +#include "bsf.h" +#include "bsf_internal.h" + +#include "libavutil/opt.h" + +typedef struct { + const AVClass *class; + + int target, i; +} DatamoshContext; + +static int datamosh_init(AVBSFContext *ctx) +{ + DatamoshContext *s = ctx->priv_data; + + s->i = 0; + + return 0; +} + +static int datamosh(AVBSFContext *ctx, AVPacket *pkt) +{ + DatamoshContext *s = ctx->priv_data; + bool key; + int ret; + + ret = ff_bsf_get_packet_ref(ctx, pkt); + if (ret < 0) + return ret; + + key = pkt->flags & AV_PKT_FLAG_KEY; + if (key) + ++s->i; + + if (s->target < 1) { + if (s->i <= -s->target) + return 0; + else if (key) { + av_packet_unref(pkt); + return AVERROR(EAGAIN); + } + } + + if (key && s->i == s->target) { + av_packet_unref(pkt); + return AVERROR(EAGAIN); + } + + return 0; +} + + +#define OFFSET(x) offsetof(DatamoshContext, x) +#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_BSF_PARAM) + +static const AVOption options[] = { + { "target", NULL, OFFSET(target), AV_OPT_TYPE_INT, { .i64 = 0 }, -INT_MAX, INT_MAX, FLAGS }, + { NULL }, +}; + +static const AVClass datamosh_class = { + .class_name = "datamosh", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +};
Has an option called "target". For a positive target, drop the nth keyframe. For a nonpositive target, allow the first n keyframe(s) and drop the remainder. Its primary purpose is for datamoshing, but it can also be used for dropping parts of audio. Signed-off-by: Marcus B Spencer <marcus@marcusspencer.xyz> --- libavcodec/bitstream_filters.c | 1 + libavcodec/bsf/Makefile | 1 + libavcodec/bsf/datamosh.c | 88 ++++++++++++++++++++++++++++++++++ 3 files changed, 90 insertions(+) create mode 100644 libavcodec/bsf/datamosh.c