Re: [FFmpeg-devel] [PATCH] [MXF] - Add jpeg2000 subdescriptor in MXF file (V2).

["Cédric Le Barz" <clebarz@ektacom.com>]

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Le 19/12/2023 à 14:36, Tomas Härdin a écrit :
>> +    for ( comp = 0; comp < component_count; comp++ ) {
>> +        avio_write(pb, &sc->j2k_info.j2k_comp_desc[3*comp] , 3);
>> +    }
> Looks like this could be simplified to just
>
>    avio_write(pb, sc->j2k_info.j2k_comp_desc, 3*component_count);
>
>> +    if (j2k_ncomponents != component_count) {
>> +        av_log(s, AV_LOG_ERROR, "Incoherence about components image
>> number.\n");
>> +    }
> I again feel this should be a hard error
>
>> +    for (comp = 0; comp < j2k_ncomponents; comp++) {
>> +        sc->j2k_info.j2k_comp_desc[comp*j2k_ncomponents] =
>> bytestream2_get_byteu(&g);   // Bitdepth for each component
>> +        sc->j2k_info.j2k_comp_desc[comp*j2k_ncomponents+1] =
>> bytestream2_get_byteu(&g); // Horizontal sampling for each component
>> +        sc->j2k_info.j2k_comp_desc[comp*j2k_ncomponents+2] =
>> bytestream2_get_byteu(&g); // Vertical sampling for each component
>> +    }
> Could be simplified to a single avio_read()
>
> /Tomas
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Here is the new version of the patch taken into account your remarks.

Regards,

Cédric Le Barz

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From: Cedric Le Barz <clebarz@ektacom.com>
To: ffmpeg-devel@ffmpeg.org
Subject: [PATCH] Add jpeg2000 subdescriptor (V2).
Date: Fri, 8 Dec 2023 16:24:42 +0100

Signed-off-by: Cedric Le Barz <clebarz@ektacom.com>
---
 ffmpeg/libavformat/mxf.h    |   1 +
 ffmpeg/libavformat/mxfenc.c | 169 +++++++++++++++++++++++++++++++++++-
 2 files changed, 169 insertions(+), 1 deletion(-)

diff --git a/ffmpeg/libavformat/mxf.h b/ffmpeg/libavformat/mxf.h
index 2561605..7dd1681 100644
--- a/ffmpeg/libavformat/mxf.h
+++ b/ffmpeg/libavformat/mxf.h
@@ -55,6 +55,7 @@ enum MXFMetadataSetType {
     SoundfieldGroupLabelSubDescriptor,
     GroupOfSoundfieldGroupsLabelSubDescriptor,
     FFV1SubDescriptor,
+    JPEG2000SubDescriptor,
 };
 
 enum MXFFrameLayout {
diff --git a/ffmpeg/libavformat/mxfenc.c b/ffmpeg/libavformat/mxfenc.c
index 53bd6ae..685c11b 100644
--- a/ffmpeg/libavformat/mxfenc.c
+++ b/ffmpeg/libavformat/mxfenc.c
@@ -48,8 +48,10 @@
 #include "libavutil/pixdesc.h"
 #include "libavutil/time_internal.h"
 #include "libavcodec/defs.h"
+#include "libavcodec/bytestream.h"
 #include "libavcodec/golomb.h"
 #include "libavcodec/h264.h"
+#include "libavcodec/jpeg2000.h"
 #include "libavcodec/packet_internal.h"
 #include "libavcodec/rangecoder.h"
 #include "libavcodec/startcode.h"
@@ -78,6 +80,20 @@ typedef struct MXFIndexEntry {
     uint8_t flags;
 } MXFIndexEntry;
 
+typedef struct j2k_info_t {
+    uint16_t j2k_cap;        ///< j2k required decoder capabilities
+    uint16_t j2k_rsiz;       ///< j2k required decoder capabilities (Rsiz)
+    uint32_t j2k_xsiz;       ///< j2k width of the reference grid (Xsiz)
+    uint32_t j2k_ysiz;       ///< j2k height of the reference grid (Ysiz)
+    uint32_t j2k_x0siz;      ///< j2k horizontal offset from the origin of the reference grid to the left side of the image (X0siz)
+    uint32_t j2k_y0siz;      ///< j2k vertical offset from the origin of the reference grid to the left side of the image (Y0siz)
+    uint32_t j2k_xtsiz;      ///< j2k width of one reference tile with respect to the reference grid (XTsiz)
+    uint32_t j2k_ytsiz;      ///< j2k height of one reference tile with respect to the reference grid (YTsiz)
+    uint32_t j2k_xt0siz;     ///< j2k horizontal offset from the origin of the reference grid to the left side of the first tile (XT0siz)
+    uint32_t j2k_yt0siz;     ///< j2k vertical offset from the origin of the reference grid to the left side of the first tile (YT0siz)
+    uint8_t  j2k_comp_desc[12]; ///< j2k components descriptor (Ssiz(i), XRsiz(i), YRsiz(i))
+} j2k_info_t;
+
 typedef struct MXFStreamContext {
     int64_t pkt_cnt;         ///< pkt counter for muxed packets
     UID track_essence_element_key;
@@ -104,6 +120,7 @@ typedef struct MXFStreamContext {
     int low_delay;           ///< low delay, used in mpeg-2 descriptor
     int avc_intra;
     int micro_version;       ///< format micro_version, used in ffv1 descriptor
+    j2k_info_t j2k_info;
 } MXFStreamContext;
 
 typedef struct MXFContainerEssenceEntry {
@@ -413,6 +430,20 @@ static const MXFLocalTagPair mxf_local_tag_batch[] = {
     { 0xDFD9, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x0E,0x04,0x01,0x06,0x0C,0x06,0x00,0x00,0x00}}, /* FFV1 Micro-version */
     { 0xDFDA, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x0E,0x04,0x01,0x06,0x0C,0x05,0x00,0x00,0x00}}, /* FFV1 Version */
     { 0xDFDB, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x0E,0x04,0x01,0x06,0x0C,0x01,0x00,0x00,0x00}}, /* FFV1 Initialization Metadata */
+    // ff_mxf_jpeg2000_local_tags
+    { 0x8400, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x04,0x06,0x10,0x00,0x00}}, /* Sub Descriptors / Opt Ordered array of strong references to sub descriptor sets */
+    { 0x8401, {0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0a,0x04,0x01,0x06,0x03,0x01,0x00,0x00,0x00}}, /* Rsiz: An enumerated value that defines the decoder capabilities */
+    { 0x8402, {0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0a,0x04,0x01,0x06,0x03,0x02,0x00,0x00,0x00}}, /* Xsiz: Width of the reference grid */
+    { 0x8403, {0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0a,0x04,0x01,0x06,0x03,0x03,0x00,0x00,0x00}}, /* Ysiz: Height of the reference grid */
+    { 0x8404, {0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0a,0x04,0x01,0x06,0x03,0x04,0x00,0x00,0x00}}, /* X0siz: Horizontal offset from the origin of the reference grid to the left side of the image area */
+    { 0x8405, {0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0a,0x04,0x01,0x06,0x03,0x05,0x00,0x00,0x00}}, /* Y0siz: Vertical offset from the origin of the reference grid to the left side of the image area */
+    { 0x8406, {0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0a,0x04,0x01,0x06,0x03,0x06,0x00,0x00,0x00}}, /* XTsiz: Width of one reference tile with respect to the reference grid */
+    { 0x8407, {0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0a,0x04,0x01,0x06,0x03,0x07,0x00,0x00,0x00}}, /* YTsiz: Height of one reference tile with respect to the reference grid */
+    { 0x8408, {0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0a,0x04,0x01,0x06,0x03,0x08,0x00,0x00,0x00}}, /* XT0siz: Horizontal offset from the origin of the reference grid to the left side of the first tile */
+    { 0x8409, {0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0a,0x04,0x01,0x06,0x03,0x09,0x00,0x00,0x00}}, /* YT0siz: Vertical offset from the origin of the reference grid to the left side of the first tile */
+    { 0x840A, {0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0a,0x04,0x01,0x06,0x03,0x0A,0x00,0x00,0x00}}, /* Csiz: The number of components in the picture */
+    { 0x840B, {0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0a,0x04,0x01,0x06,0x03,0x0B,0x00,0x00,0x00}}, /* Ssizi, XRSizi, YRSizi: Array of picture components where each component comprises 3 bytes named Ssizi, XRSizi, YRSizi.  The array of 3-byte groups is preceded by the array header comprising a 4-byte value of the number of components followed by a 4-byte value of 3. */
+    { 0x840C, {0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0a,0x04,0x01,0x06,0x03,0x0E,0x00,0x00,0x00}}, /* The nature and order of the image components in the compressed domain as carried in the J2C codestream. */
 };
 
 #define MXF_NUM_TAGS FF_ARRAY_ELEMS(mxf_local_tag_batch)
@@ -549,7 +580,7 @@ static void mxf_write_primer_pack(AVFormatContext *s)
     MXFContext *mxf = s->priv_data;
     AVIOContext *pb = s->pb;
     int local_tag_number = MXF_NUM_TAGS, i;
-    int will_have_avc_tags = 0, will_have_mastering_tags = 0, will_have_ffv1_tags = 0;
+    int will_have_avc_tags = 0, will_have_mastering_tags = 0, will_have_ffv1_tags = 0, will_have_jpeg2000_tags = 0;
 
     for (i = 0; i < s->nb_streams; i++) {
         MXFStreamContext *sc = s->streams[i]->priv_data;
@@ -564,6 +595,9 @@ static void mxf_write_primer_pack(AVFormatContext *s)
         if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_FFV1) {
             will_have_ffv1_tags = 1;
         }
+        if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_JPEG2000){
+            will_have_jpeg2000_tags = 1;
+        }
     }
 
     if (!mxf->store_user_comments) {
@@ -595,6 +629,22 @@ static void mxf_write_primer_pack(AVFormatContext *s)
         mxf_mark_tag_unused(mxf, 0xDFDB);
     }
 
+    if (!will_have_jpeg2000_tags) {
+        mxf_mark_tag_unused(mxf, 0x8400);
+        mxf_mark_tag_unused(mxf, 0x8401);
+        mxf_mark_tag_unused(mxf, 0x8402);
+        mxf_mark_tag_unused(mxf, 0x8403);
+        mxf_mark_tag_unused(mxf, 0x8404);
+        mxf_mark_tag_unused(mxf, 0x8405);
+        mxf_mark_tag_unused(mxf, 0x8406);
+        mxf_mark_tag_unused(mxf, 0x8407);
+        mxf_mark_tag_unused(mxf, 0x8408);
+        mxf_mark_tag_unused(mxf, 0x8409);
+        mxf_mark_tag_unused(mxf, 0x840A);
+        mxf_mark_tag_unused(mxf, 0x840B);
+        mxf_mark_tag_unused(mxf, 0x840C);
+    }
+
     for (i = 0; i < MXF_NUM_TAGS; i++) {
         if (mxf->unused_tags[i]) {
             local_tag_number--;
@@ -1136,6 +1186,7 @@ static const UID mxf_generic_sound_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0
 
 static const UID mxf_avc_subdescriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x6E,0x00 };
 static const UID mxf_ffv1_subdescriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x81,0x03 };
+static const UID mxf_jpeg2000_subdescriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x5A,0x00};
 
 static inline uint16_t rescale_mastering_chroma(AVRational q)
 {
@@ -1430,6 +1481,64 @@ static void mxf_write_avc_subdesc(AVFormatContext *s, AVStream *st)
     mxf_update_klv_size(s->pb, pos);
 }
 
+static void mxf_write_jpeg2000_subdesc(AVFormatContext *s, AVStream *st)
+{
+    MXFStreamContext *sc = st->priv_data;
+    AVIOContext *pb = s->pb;
+    int64_t pos;
+    int component_count = av_pix_fmt_count_planes(st->codecpar->format);
+    int comp = 0;
+
+    /* JPEG2000 subdescriptor key */
+    avio_write(pb, mxf_jpeg2000_subdescriptor_key, 16);
+    klv_encode_ber4_length(pb, 0);
+    pos = avio_tell(pb);
+
+    mxf_write_local_tag(s, 16, 0x3C0A);
+    mxf_write_uuid(pb, JPEG2000SubDescriptor, 0);
+
+    /* Value defining the decoder capabilities (rsiz) */
+    mxf_write_local_tag(s, 2, 0x8401);
+    avio_wb16(pb, sc->j2k_info.j2k_rsiz);
+    /* Width of the JPEG2000 reference grid (Xsiz) */
+    mxf_write_local_tag(s, 4, 0x8402);
+    avio_wb32(pb, st->codecpar->width);
+    /* Height of the JPEG2000 reference grid (Ysiz) */
+    mxf_write_local_tag(s, 4, 0x8403);
+    avio_wb32(pb, st->codecpar->height);
+    /* Horizontal offset from the reference grid origin to the left side of the image area (X0siz) */
+    mxf_write_local_tag(s, 4, 0x8404);
+    avio_wb32(pb, sc->j2k_info.j2k_x0siz);
+    /* Vertical offset from the reference grid origin to the left side of the image area (Y0siz) */
+    mxf_write_local_tag(s, 4, 0x8405);
+    avio_wb32(pb, sc->j2k_info.j2k_y0siz);
+    /* Width of one reference tile with respect to the reference grid (XTsiz) */
+    mxf_write_local_tag(s, 4, 0x8406);
+    avio_wb32(pb, sc->j2k_info.j2k_xtsiz);
+    /* Height of one reference tile with respect to the reference grid (YTsiz) */
+    mxf_write_local_tag(s, 4, 0x8407);
+    avio_wb32(pb, sc->j2k_info.j2k_ytsiz);
+    /* Horizontal offset from the origin of the reference grid to the left side of the first tile (XT0siz) */
+    mxf_write_local_tag(s, 4, 0x8408);
+    avio_wb32(pb, sc->j2k_info.j2k_xt0siz);
+    /* Vertical offset from the origin of the reference grid to the left side of the first tile (YT0siz) */
+    mxf_write_local_tag(s, 4, 0x8409);
+    avio_wb32(pb, sc->j2k_info.j2k_yt0siz);
+    /* Image components number (Csiz) */
+    mxf_write_local_tag(s, 2, 0x840A);
+    avio_wb16(pb, component_count);
+    /* Array of picture components where each component comprises 3 bytes named Ssiz(i) (Pixel bitdepth - 1),
+       XRSiz(i) (Horizontal sampling), YRSiz(i) (Vertical sampling). The array of 3-byte groups is preceded
+       by the array header comprising a 4-byte value of the number of components followed by a 4-byte
+       value of 3. */
+    mxf_write_local_tag(s, 8 + 3*component_count, 0x840B);
+    avio_wb32(pb, component_count);
+    avio_wb32(pb, 3);
+    avio_write(pb, sc->j2k_info.j2k_comp_desc, 3*component_count);
+
+    mxf_update_klv_size(pb, pos);
+}
+
 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st)
 {
     int64_t pos = mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key);
@@ -1438,6 +1547,9 @@ static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st)
     if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
         mxf_write_avc_subdesc(s, st);
     }
+    if (st->codecpar->codec_id == AV_CODEC_ID_JPEG2000) {
+         mxf_write_jpeg2000_subdesc(s, st);
+    }
 }
 
 static void mxf_write_h264_desc(AVFormatContext *s, AVStream *st)
@@ -2524,6 +2636,56 @@ static int mxf_parse_ffv1_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)
     return 1;
 }
 
+static int mxf_parse_jpeg2000_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)
+{
+    MXFContext *mxf = s->priv_data;
+    MXFStreamContext *sc = st->priv_data;
+    AVIOContext *pb = s->pb;
+    int component_count = av_pix_fmt_count_planes(st->codecpar->format);
+    GetByteContext g;
+    uint32_t j2k_ncomponents;
+    int comp;
+
+    if (mxf->header_written)
+        return 1;
+
+    bytestream2_init(&g,pkt->data,pkt->size);
+
+    while (bytestream2_get_bytes_left(&g) >= 3 && bytestream2_peek_be16(&g) != JPEG2000_SOC)
+        bytestream2_skip(&g, 1);
+
+    if (bytestream2_get_be16u(&g) != JPEG2000_SOC) {
+        av_log(s, AV_LOG_ERROR, "Mandatory SOC marker is not present\n");
+        return AVERROR(AVERROR_INVALIDDATA);
+    }
+
+    /* Extract usefull size information from the SIZ marker */
+    if (bytestream2_get_be16u(&g) != JPEG2000_SIZ) {
+        av_log(s, AV_LOG_ERROR, "Mandatory SIZ marker is not present\n");
+        return AVERROR(AVERROR_INVALIDDATA);
+    }
+    bytestream2_skip(&g, 2); // Skip Lsiz
+    sc->j2k_info.j2k_cap = bytestream2_get_be16u(&g);
+    sc->j2k_info.j2k_xsiz = bytestream2_get_be32u(&g);
+    sc->j2k_info.j2k_ysiz = bytestream2_get_be32u(&g);
+    sc->j2k_info.j2k_x0siz = bytestream2_get_be32u(&g);
+    sc->j2k_info.j2k_y0siz = bytestream2_get_be32u(&g);
+    sc->j2k_info.j2k_xtsiz = bytestream2_get_be32u(&g);
+    sc->j2k_info.j2k_ytsiz = bytestream2_get_be32u(&g);
+    sc->j2k_info.j2k_xt0siz = bytestream2_get_be32u(&g);
+    sc->j2k_info.j2k_yt0siz = bytestream2_get_be32u(&g);
+    j2k_ncomponents = bytestream2_get_be16u(&g);
+    if (j2k_ncomponents != component_count) {
+        av_log(s, AV_LOG_ERROR, "Incoherence about components image number.\n");
+        return AVERROR(AVERROR_INVALIDDATA);
+    }
+    bytestream2_get_bufferu(&g, sc->j2k_info.j2k_comp_desc, 3 * j2k_ncomponents);
+
+    sc->frame_size = pkt->size;
+
+    return 1;
+}
+
 static const UID mxf_mpeg2_codec_uls[] = {
     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
@@ -3140,6 +3302,11 @@ static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
             av_log(s, AV_LOG_ERROR, "could not get ffv1 version\n");
             return -1;
         }
+    } else if (st->codecpar->codec_id == AV_CODEC_ID_JPEG2000) {
+        if (!mxf_parse_jpeg2000_frame(s, st, pkt)) {
+            av_log(s, AV_LOG_ERROR, "could not get jpeg2000 profile\n");
+            return -1;
+        }
     }
 
     if (mxf->cbr_index) {
-- 
2.34.1


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