[FFmpeg-devel] [PATCH] configure: Separate subsystem for Immersive Audio Model

[FFmpeg-devel] [PATCH] configure: Separate subsystem for Immersive Audio Model

[Eugene Zemtsov via ffmpeg-devel]

From: Eugene Zemtsov <eugene@chromium.org>

This change allows users to link ffmpeg as a library without
support for Immersive Audio Model by specifying --disable-iamf.
It helps to save on binary size in cases where it's important.

Signed-off-by: Eugene Zemtsov <eugene@chromium.org>
---
 configure         |  7 ++++++-
 libavformat/mov.c | 15 ++++++++++++++-
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index d03e7e1631..56cc03f68a 100755
--- a/configure
+++ b/configure
@@ -141,6 +141,7 @@ Component options:
   --disable-lsp            disable LSP code
   --disable-faan           disable floating point AAN (I)DCT code
   --disable-pixelutils     disable pixel utils in libavutil
+  --disable-iamf           disable support for Immersive Audio Model
 
 Individual component options:
   --disable-everything     disable all components listed below
@@ -2018,6 +2019,7 @@ SUBSYSTEM_LIST="
     lsp
     pixelutils
     network
+    iamf
 "
 
 # COMPONENT_LIST needs to come last to ensure correct dependency checking
@@ -2806,6 +2808,8 @@ mpegvideoenc_select="aandcttables fdctdsp me_cmp mpegvideo pixblockdsp"
 msmpeg4dec_select="h263_decoder"
 msmpeg4enc_select="h263_encoder"
 vc1dsp_select="h264chroma qpeldsp startcode"
+iamfdec_deps="iamf"
+iamfenc_deps="iamf"
 
 # decoders / encoders
 aac_decoder_select="adts_header mpeg4audio sinewin"
@@ -3552,7 +3556,7 @@ matroska_demuxer_suggest="bzlib zlib"
 matroska_muxer_select="mpeg4audio riffenc aac_adtstoasc_bsf pgs_frame_merge_bsf vp9_superframe_bsf"
 mlp_demuxer_select="mlp_parser"
 mmf_muxer_select="riffenc"
-mov_demuxer_select="iso_media riffdec iamfdec"
+mov_demuxer_select="iso_media riffdec"
 mov_demuxer_suggest="zlib"
 mov_muxer_select="iso_media riffenc rtpenc_chain vp9_superframe_bsf aac_adtstoasc_bsf ac3_parser"
 mp3_demuxer_select="mpegaudio_parser"
@@ -4029,6 +4033,7 @@ enable safe_bitstream_reader
 enable static
 enable swscale_alpha
 enable valgrind_backtrace
+enable iamf iamfdec iamfenc
 
 sws_max_filter_size_default=256
 set_default sws_max_filter_size
diff --git a/libavformat/mov.c b/libavformat/mov.c
index c55778f3ef..662301bf67 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -839,6 +839,7 @@ static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     return 0;
 }
 
+#if CONFIG_IAMFDEC
 static int mov_read_iacb(MOVContext *c, AVIOContext *pb, MOVAtom atom)
 {
     AVStream *st;
@@ -1015,6 +1016,7 @@ fail:
 
     return ret;
 }
+#endif
 
 static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
 {
@@ -4797,6 +4799,7 @@ static void fix_timescale(MOVContext *c, MOVStreamContext *sc)
     }
 }
 
+#if CONFIG_IAMFDEC
 static int mov_update_iamf_streams(MOVContext *c, const AVStream *st)
 {
     const MOVStreamContext *sc = st->priv_data;
@@ -4840,6 +4843,7 @@ static int mov_update_iamf_streams(MOVContext *c, const AVStream *st)
 
     return 0;
 }
+#endif
 
 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
 {
@@ -4921,11 +4925,13 @@ static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
 
     mov_build_index(c, st);
 
+#if CONFIG_IAMFDEC
     if (sc->iamf) {
         ret = mov_update_iamf_streams(c, st);
         if (ret < 0)
             return ret;
     }
+#endif
 
     if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
         MOVDref *dref = &sc->drefs[sc->dref_id - 1];
@@ -8457,7 +8463,9 @@ static const MOVParseTableEntry mov_default_parse_table[] = {
 { MKTAG('i','p','r','p'), mov_read_iprp },
 { MKTAG('i','i','n','f'), mov_read_iinf },
 { MKTAG('a','m','v','e'), mov_read_amve }, /* ambient viewing environment box */
+#if CONFIG_IAMFDEC
 { MKTAG('i','a','c','b'), mov_read_iacb },
+#endif
 { 0, NULL }
 };
 
@@ -8929,8 +8937,10 @@ static void mov_free_stream_context(AVFormatContext *s, AVStream *st)
     av_freep(&sc->coll);
     av_freep(&sc->ambient);
 
+#if CONFIG_IAMFDEC
     if (sc->iamf)
         ff_iamf_read_deinit(sc->iamf);
+#endif
     av_freep(&sc->iamf);
 }
 
@@ -9570,6 +9580,7 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
 
         if (st->codecpar->codec_id == AV_CODEC_ID_EIA_608 && sample->size > 8)
             ret = get_eia608_packet(sc->pb, pkt, sample->size);
+#if CONFIG_IAMFDEC
         else if (sc->iamf) {
             int64_t pts, dts, pos, duration;
             int flags, size = sample->size;
@@ -9592,7 +9603,9 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
             }
             if (!ret)
                 return FFERROR_REDO;
-        } else
+        }
+#endif
+        else
             ret = av_get_packet(sc->pb, pkt, sample->size);
         if (ret < 0) {
             if (should_retry(sc->pb, ret)) {
-- 
2.44.0.478.gd926399ef9-goog

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Re: [FFmpeg-devel] [PATCH] configure: Separate subsystem for Immersive Audio Model

[James Almer]

On 4/3/2024 1:01 AM, Eugene Zemtsov via ffmpeg-devel wrote:
> From: Eugene Zemtsov <eugene@chromium.org>
> 
> This change allows users to link ffmpeg as a library without
> support for Immersive Audio Model by specifying --disable-iamf.
> It helps to save on binary size in cases where it's important.
> 
> Signed-off-by: Eugene Zemtsov <eugene@chromium.org>
> ---
>   configure         |  7 ++++++-
>   libavformat/mov.c | 15 ++++++++++++++-
>   2 files changed, 20 insertions(+), 2 deletions(-)

Amended it to also include movenc and applied it. Thanks.
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