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* [FFmpeg-devel] [PATCH v6 1/2] avcodec/pngenc: support writing iCCP chunks
@ 2022-03-24 15:19 Niklas Haas
  2022-03-24 15:20 ` [FFmpeg-devel] [PATCH v6 2/2] avcodec/mjpegenc: support writing ICC profiles Niklas Haas
  0 siblings, 1 reply; 3+ messages in thread
From: Niklas Haas @ 2022-03-24 15:19 UTC (permalink / raw)
  To: ffmpeg-devel; +Cc: Niklas Haas

From: Niklas Haas <git@haasn.dev>

We re-use the PNGEncContext.zstream for deflate-related operations.
Other than that, the code is pretty straightforward. Special care needs
to be taken to avoid writing more than 79 characters of the profile
description (the maximum supported).

To write the (dynamically sized) deflate-encoded data, we allocate extra
space in the packet and use that directly as a scratch buffer. Modify
png_write_chunk slightly to allow pre-writing the chunk contents like
this.

Also add a FATE transcode test to ensure that the ICC profile gets
encoded correctly.

Signed-off-by: Niklas Haas <git@haasn.dev>
---
Difference to v5:
- Rebaster onto master
- Updated code to adapt it to upstream FFZStream changes
- Removed unnecessary ztream field setting (deflateBound)
- Added proper dependencies to the FATE test
- Clean up overflow testing
---
 libavcodec/pngenc.c    | 91 +++++++++++++++++++++++++++++++++++++++++-
 tests/fate/image.mak   | 10 ++++-
 tests/ref/fate/png-icc | 43 ++++++++++++++++++++
 3 files changed, 140 insertions(+), 4 deletions(-)
 create mode 100644 tests/ref/fate/png-icc

diff --git a/libavcodec/pngenc.c b/libavcodec/pngenc.c
index f67f90cd14..1571673f7c 100644
--- a/libavcodec/pngenc.c
+++ b/libavcodec/pngenc.c
@@ -236,7 +236,8 @@ static void png_write_chunk(uint8_t **f, uint32_t tag,
     bytestream_put_be32(f, av_bswap32(tag));
     if (length > 0) {
         crc = av_crc(crc_table, crc, buf, length);
-        memcpy(*f, buf, length);
+        if (*f != buf)
+            memcpy(*f, buf, length);
         *f += length;
     }
     bytestream_put_be32(f, ~crc);
@@ -345,10 +346,54 @@ static int png_get_gama(enum AVColorTransferCharacteristic trc, uint8_t *buf)
     return 1;
 }
 
+static int png_write_iccp(AVCodecContext *avctx, const AVFrameSideData *sd)
+{
+    PNGEncContext *s = avctx->priv_data;
+    z_stream *const zstream = &s->zstream.zstream;
+    const AVDictionaryEntry *entry;
+    const char *name;
+    uint8_t *start, *buf;
+    int ret;
+
+    if (!sd || !sd->size)
+        return 0;
+    zstream->next_in  = sd->data;
+    zstream->avail_in = sd->size;
+
+    /* write the chunk contents first */
+    start = s->bytestream + 8; /* make room for iCCP tag + length */
+    buf = start;
+
+    /* profile description */
+    entry = av_dict_get(sd->metadata, "name", NULL, 0);
+    name = (entry && entry->value[0]) ? entry->value : "icc";
+    for (int i = 0;; i++) {
+        char c = (i == 79) ? 0 : name[i];
+        bytestream_put_byte(&buf, c);
+        if (!c)
+            break;
+    }
+
+    /* compression method and profile data */
+    bytestream_put_byte(&buf, 0);
+    zstream->next_out  = buf;
+    zstream->avail_out = s->bytestream_end - buf;
+    ret = deflate(zstream, Z_FINISH);
+    deflateReset(zstream);
+    if (ret != Z_STREAM_END)
+        return AVERROR_EXTERNAL;
+
+    /* rewind to the start and write the chunk header/crc */
+    png_write_chunk(&s->bytestream, MKTAG('i', 'C', 'C', 'P'), start,
+                    zstream->next_out - start);
+    return 0;
+}
+
 static int encode_headers(AVCodecContext *avctx, const AVFrame *pict)
 {
     AVFrameSideData *side_data;
     PNGEncContext *s = avctx->priv_data;
+    int ret;
 
     /* write png header */
     AV_WB32(s->buf, avctx->width);
@@ -401,7 +446,13 @@ static int encode_headers(AVCodecContext *avctx, const AVFrame *pict)
     if (png_get_gama(pict->color_trc, s->buf))
         png_write_chunk(&s->bytestream, MKTAG('g', 'A', 'M', 'A'), s->buf, 4);
 
-    /* put the palette if needed */
+    side_data = av_frame_get_side_data(pict, AV_FRAME_DATA_ICC_PROFILE);
+    if ((ret = png_write_iccp(avctx, side_data))) {
+        av_log(avctx, AV_LOG_WARNING, "Failed writing iCCP chunk\n");
+        return ret;
+    }
+
+    /* put the palette if needed, must be after colorspace information */
     if (s->color_type == PNG_COLOR_TYPE_PALETTE) {
         int has_alpha, alpha, i;
         unsigned int v;
@@ -525,6 +576,38 @@ the_end:
     return ret;
 }
 
+static int add_icc_profile_size(AVCodecContext *avctx, const AVFrame *pict,
+                                size_t *max_packet_size)
+{
+    PNGEncContext *s = avctx->priv_data;
+    const AVFrameSideData *sd;
+    const int hdr_size = 128;
+    size_t new_pkt_size;
+    uLong bound;
+
+    if (!pict)
+        return 0;
+    sd = av_frame_get_side_data(pict, AV_FRAME_DATA_ICC_PROFILE);
+    if (!sd || !sd->size)
+        return 0;
+    if (sd->size > ULONG_MAX)
+        goto overflow;
+
+    bound = deflateBound(&s->zstream.zstream, sd->size);
+    if (bound > INT32_MAX - hdr_size)
+        goto overflow;
+
+    new_pkt_size = *max_packet_size + bound + hdr_size;
+    if (new_pkt_size < *max_packet_size)
+        goto overflow;
+    *max_packet_size = new_pkt_size;
+    return 0;
+
+overflow:
+    av_log(avctx, AV_LOG_WARNING, "ICC profile too large\n");
+    return AVERROR_INVALIDDATA;
+}
+
 static int encode_png(AVCodecContext *avctx, AVPacket *pkt,
                       const AVFrame *pict, int *got_packet)
 {
@@ -541,6 +624,8 @@ static int encode_png(AVCodecContext *avctx, AVPacket *pkt,
             enc_row_size +
             12 * (((int64_t)enc_row_size + IOBUF_SIZE - 1) / IOBUF_SIZE) // IDAT * ceil(enc_row_size / IOBUF_SIZE)
         );
+    if ((ret = add_icc_profile_size(avctx, pict, &max_packet_size)))
+        return ret;
     ret = ff_alloc_packet(avctx, pkt, max_packet_size);
     if (ret < 0)
         return ret;
@@ -870,6 +955,8 @@ static int encode_apng(AVCodecContext *avctx, AVPacket *pkt,
             enc_row_size +
             (4 + 12) * (((int64_t)enc_row_size + IOBUF_SIZE - 1) / IOBUF_SIZE) // fdAT * ceil(enc_row_size / IOBUF_SIZE)
         );
+    if ((ret = add_icc_profile_size(avctx, pict, &max_packet_size)))
+        return ret;
     if (max_packet_size > INT_MAX)
         return AVERROR(ENOMEM);
 
diff --git a/tests/fate/image.mak b/tests/fate/image.mak
index 573d398915..c6374c7d8a 100644
--- a/tests/fate/image.mak
+++ b/tests/fate/image.mak
@@ -385,11 +385,15 @@ FATE_PNG_PROBE += fate-png-side-data
 fate-png-side-data: CMD = run ffprobe$(PROGSSUF)$(EXESUF) -show_frames \
     -i $(TARGET_SAMPLES)/png1/lena-int_rgb24.png
 
+FATE_PNG_TRANSCODE-$(call ENCDEC, PNG, IMAGE2) += fate-png-icc
+fate-png-icc: CMD = transcode png_pipe $(TARGET_SAMPLES)/png1/lena-int_rgb24.png image2 "-c png" "" "" "-show_frames"
+
 FATE_PNG-$(call DEMDEC, IMAGE2, PNG) += $(FATE_PNG)
 FATE_PNG_PROBE-$(call DEMDEC, IMAGE2, PNG) += $(FATE_PNG_PROBE)
 FATE_IMAGE += $(FATE_PNG-yes)
 FATE_IMAGE_PROBE += $(FATE_PNG_PROBE-yes)
-fate-png: $(FATE_PNG-yes) $(FATE_PNG_PROBE-yes)
+FATE_IMAGE_TRANSCODE += $(FATE_PNG_TRANSCODE-yes)
+fate-png: $(FATE_PNG-yes) $(FATE_PNG_PROBE-yes) $(FATE_PNG_TRANSCODE-yes)
 
 FATE_IMAGE-$(call DEMDEC, IMAGE2, PTX) += fate-ptx
 fate-ptx: CMD = framecrc -i $(TARGET_SAMPLES)/ptx/_113kw_pic.ptx -pix_fmt rgb24 -vf scale
@@ -551,8 +555,10 @@ fate-xbm: $(FATE_XBM-yes)
 
 FATE_IMAGE += $(FATE_IMAGE-yes)
 FATE_IMAGE_PROBE += $(FATE_IMAGE_PROBE-yes)
+FATE_IMAGE_TRANSCODE += $(FATE_IMAGE_TRANSCODE-yes)
 
 FATE_SAMPLES_FFMPEG += $(FATE_IMAGE)
 FATE_SAMPLES_FFPROBE += $(FATE_IMAGE_PROBE)
+FATE_SAMPLES_FFMPEG_FFPROBE += $(FATE_IMAGE_TRANSCODE)
 
-fate-image: $(FATE_IMAGE) $(FATE_IMAGE_PROBE)
+fate-image: $(FATE_IMAGE) $(FATE_IMAGE_PROBE) $(FATE_IMAGE_TRANSCODE)
diff --git a/tests/ref/fate/png-icc b/tests/ref/fate/png-icc
new file mode 100644
index 0000000000..542bb76f9a
--- /dev/null
+++ b/tests/ref/fate/png-icc
@@ -0,0 +1,43 @@
+a50d37a0e72bddea2fcbba6fb773e2a0 *tests/data/fate/png-icc.image2
+49397 tests/data/fate/png-icc.image2
+#tb 0: 1/25
+#media_type 0: video
+#codec_id 0: rawvideo
+#dimensions 0: 128x128
+#sar 0: 2835/2835
+0,          0,          0,        1,    49152, 0xe0013dee
+[FRAME]
+media_type=video
+stream_index=0
+key_frame=1
+pts=0
+pts_time=0.000000
+pkt_dts=0
+pkt_dts_time=0.000000
+best_effort_timestamp=0
+best_effort_timestamp_time=0.000000
+pkt_duration=1
+pkt_duration_time=0.040000
+pkt_pos=0
+pkt_size=49397
+width=128
+height=128
+pix_fmt=rgb24
+sample_aspect_ratio=1:1
+pict_type=I
+coded_picture_number=0
+display_picture_number=0
+interlaced_frame=0
+top_field_first=0
+repeat_pict=0
+color_range=pc
+color_space=unknown
+color_primaries=unknown
+color_transfer=unknown
+chroma_location=unspecified
+[SIDE_DATA]
+side_data_type=ICC profile
+name=Photoshop ICC profile
+size=3144
+[/SIDE_DATA]
+[/FRAME]
-- 
2.35.1

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^ permalink raw reply	[flat|nested] 3+ messages in thread
* [FFmpeg-devel] [PATCH v6 2/2] avcodec/mjpegenc: support writing ICC profiles
  2022-03-24 15:19 [FFmpeg-devel] [PATCH v6 1/2] avcodec/pngenc: support writing iCCP chunks Niklas Haas
@ 2022-03-24 15:20 ` Niklas Haas
  2022-03-24 18:12   ` Michael Niedermayer
  0 siblings, 1 reply; 3+ messages in thread
From: Niklas Haas @ 2022-03-24 15:20 UTC (permalink / raw)
  To: ffmpeg-devel; +Cc: Niklas Haas

From: Niklas Haas <git@haasn.dev>

This is mostly straightforward. The major complication is that, as a
result of the 16-bit chunk size limitation, ICC profiles may need to be
split up into multiple chunks.

We also need to make sure to allocate enough extra space in the packet
to fit the ICC profile, so modify both mpegvideo_enc.c and ljpegenc.c to
take into account this extra overhead, failing cleanly if necessary.

Also add a FATE transcode test to ensure that the ICC profile gets
written (and read) correctly. Note that this ICC profile is smaller than
64 kB, so this doesn't test the APP2 chunk re-arranging code at all.

Signed-off-by: Niklas Haas <git@haasn.dev>
---
Difference to v2:
- Added proper packet overhead size accounting
- Moved ICC-profile-too-large bailout to allocation
- Removed unnecessary `!frame` check
- Use only legal static initializers
- Use SIZE_SPECIFIER instead of %zu
- Check for overflow
- Add ffprobe dependency
- Use byte-aligned pointer writing code instead of putbit
---
 libavcodec/ljpegenc.c        |  6 ++--
 libavcodec/mjpegenc.c        |  3 +-
 libavcodec/mjpegenc_common.c | 66 ++++++++++++++++++++++++++++++++++--
 libavcodec/mjpegenc_common.h |  4 ++-
 libavcodec/mpegvideo_enc.c   |  4 ++-
 tests/fate/image.mak         |  6 +++-
 tests/ref/fate/jpg-icc       | 42 +++++++++++++++++++++++
 7 files changed, 122 insertions(+), 9 deletions(-)
 create mode 100644 tests/ref/fate/jpg-icc

diff --git a/libavcodec/ljpegenc.c b/libavcodec/ljpegenc.c
index fad19cbb76..382d291621 100644
--- a/libavcodec/ljpegenc.c
+++ b/libavcodec/ljpegenc.c
@@ -220,7 +220,7 @@ static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
     const int height = avctx->height;
     const int mb_width  = (width  + s->hsample[0] - 1) / s->hsample[0];
     const int mb_height = (height + s->vsample[0] - 1) / s->vsample[0];
-    int max_pkt_size = AV_INPUT_BUFFER_MIN_SIZE;
+    size_t max_pkt_size = AV_INPUT_BUFFER_MIN_SIZE;
     int ret, header_bits;
 
     if(    avctx->pix_fmt == AV_PIX_FMT_BGR0
@@ -233,12 +233,14 @@ static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                         * s->hsample[0] * s->vsample[0];
     }
 
+    if ((ret = ff_mjpeg_add_icc_profile_size(avctx, pict, &max_pkt_size)) < 0)
+        return ret;
     if ((ret = ff_alloc_packet(avctx, pkt, max_pkt_size)) < 0)
         return ret;
 
     init_put_bits(&pb, pkt->data, pkt->size);
 
-    ff_mjpeg_encode_picture_header(avctx, &pb, NULL, &s->scantable,
+    ff_mjpeg_encode_picture_header(avctx, &pb, pict, NULL, &s->scantable,
                                    s->pred, s->matrix, s->matrix);
 
     header_bits = put_bits_count(&pb);
diff --git a/libavcodec/mjpegenc.c b/libavcodec/mjpegenc.c
index a39b990eea..d35195d52e 100644
--- a/libavcodec/mjpegenc.c
+++ b/libavcodec/mjpegenc.c
@@ -80,7 +80,7 @@ static av_cold void init_uni_ac_vlc(const uint8_t huff_size_ac[256],
 
 static void mjpeg_encode_picture_header(MpegEncContext *s)
 {
-    ff_mjpeg_encode_picture_header(s->avctx, &s->pb, s->mjpeg_ctx,
+    ff_mjpeg_encode_picture_header(s->avctx, &s->pb, s->picture->f, s->mjpeg_ctx,
                                    &s->intra_scantable, 0,
                                    s->intra_matrix, s->chroma_intra_matrix);
 
@@ -130,6 +130,7 @@ static void mjpeg_encode_picture_frame(MpegEncContext *s)
     }
 
     bytes_needed = (total_bits + 7) / 8;
+    ff_mjpeg_add_icc_profile_size(s->avctx, s->picture->f, &bytes_needed);
     ff_mpv_reallocate_putbitbuffer(s, bytes_needed, bytes_needed);
 
     for (int i = 0; i < m->huff_ncode; i++) {
diff --git a/libavcodec/mjpegenc_common.c b/libavcodec/mjpegenc_common.c
index 7b82644763..17103051a8 100644
--- a/libavcodec/mjpegenc_common.c
+++ b/libavcodec/mjpegenc_common.c
@@ -131,8 +131,39 @@ static void jpeg_table_header(AVCodecContext *avctx, PutBitContext *p,
     AV_WB16(ptr, size);
 }
 
-static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p)
+static const uint8_t icc_hdr_size = 16; /* ICC_PROFILE\0 tag + 4 bytes */
+static const uint16_t icc_chunk_size = UINT16_MAX - icc_hdr_size;
+static const uint8_t icc_max_chunks = UINT8_MAX;
+
+int ff_mjpeg_add_icc_profile_size(AVCodecContext *avctx, const AVFrame *frame,
+                                  size_t *max_pkt_size)
 {
+    const AVFrameSideData *sd;
+    size_t new_pkt_size;
+    int nb_chunks;
+    sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE);
+    if (!sd || !sd->size)
+        return 0;
+
+    if (sd->size > icc_max_chunks * icc_chunk_size) {
+        av_log(avctx, AV_LOG_ERROR, "Cannot store %"SIZE_SPECIFIER" byte ICC "
+               "profile: too large for JPEG\n",
+               sd->size);
+        return AVERROR_INVALIDDATA;
+    }
+
+    nb_chunks = (sd->size + icc_chunk_size - 1) / icc_chunk_size;
+    new_pkt_size = *max_pkt_size + nb_chunks * (UINT16_MAX + 2 /* APP2 marker */);
+    if (new_pkt_size < *max_pkt_size) /* overflow */
+        return AVERROR_INVALIDDATA;
+    *max_pkt_size = new_pkt_size;
+    return 0;
+}
+
+static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p,
+                              const AVFrame *frame)
+{
+    const AVFrameSideData *sd = NULL;
     int size;
     uint8_t *ptr;
 
@@ -162,6 +193,35 @@ static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p)
         put_bits(p, 8, 0); /* thumbnail height */
     }
 
+    /* ICC profile */
+    sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE);
+    if (sd && sd->size) {
+        const int nb_chunks = (sd->size + icc_chunk_size - 1) / icc_chunk_size;
+        const uint8_t *data = sd->data;
+        size_t remaining = sd->size;
+        /* must already be checked by the packat allocation code */
+        av_assert0(remaining <= icc_max_chunks * icc_chunk_size);
+        flush_put_bits(p);
+        for (int i = 0; i < nb_chunks; i++) {
+            size = FFMIN(remaining, icc_chunk_size);
+            av_assert1(size > 0);
+            ptr = put_bits_ptr(p);
+            ptr[0] = 0xff; /* chunk marker, not part of icc_hdr_size */
+            ptr[1] = APP2;
+            AV_WB16(ptr+2, size + icc_hdr_size);
+            AV_WL32(ptr+4,  MKTAG('I','C','C','_'));
+            AV_WL32(ptr+8,  MKTAG('P','R','O','F'));
+            AV_WL32(ptr+12, MKTAG('I','L','E','\0'));
+            ptr[16] = i+1;
+            ptr[17] = nb_chunks;
+            memcpy(&ptr[18], data, size);
+            skip_put_bytes(p, size + icc_hdr_size + 2);
+            remaining -= size;
+            data += size;
+        }
+        av_assert1(!remaining);
+    }
+
     /* comment */
     if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
         put_marker(p, COM);
@@ -214,7 +274,7 @@ void ff_mjpeg_init_hvsample(AVCodecContext *avctx, int hsample[4], int vsample[4
 }
 
 void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb,
-                                    MJpegContext *m,
+                                    const AVFrame *frame, struct MJpegContext *m,
                                     ScanTable *intra_scantable, int pred,
                                     uint16_t luma_intra_matrix[64],
                                     uint16_t chroma_intra_matrix[64])
@@ -234,7 +294,7 @@ void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb,
     if (avctx->codec_id == AV_CODEC_ID_AMV)
         return;
 
-    jpeg_put_comments(avctx, pb);
+    jpeg_put_comments(avctx, pb, frame);
 
     jpeg_table_header(avctx, pb, m, intra_scantable,
                       luma_intra_matrix, chroma_intra_matrix, hsample);
diff --git a/libavcodec/mjpegenc_common.h b/libavcodec/mjpegenc_common.h
index ac753bf153..69e132f223 100644
--- a/libavcodec/mjpegenc_common.h
+++ b/libavcodec/mjpegenc_common.h
@@ -29,8 +29,10 @@
 
 struct MJpegContext;
 
+int ff_mjpeg_add_icc_profile_size(AVCodecContext *avctx, const AVFrame *frame,
+                                  size_t *max_pkt_size);
 void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb,
-                                    struct MJpegContext *m,
+                                    const AVFrame *frame, struct MJpegContext *m,
                                     ScanTable *intra_scantable, int pred,
                                     uint16_t luma_intra_matrix[64],
                                     uint16_t chroma_intra_matrix[64]);
diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index 71c999fab0..7fe889dec3 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -1689,9 +1689,11 @@ int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
     /* output? */
     if (s->new_picture.f->data[0]) {
         int growing_buffer = context_count == 1 && !pkt->data && !s->data_partitioning;
-        int pkt_size = growing_buffer ? FFMAX(s->mb_width*s->mb_height*64+10000, avctx->internal->byte_buffer_size) - AV_INPUT_BUFFER_PADDING_SIZE
+        size_t pkt_size = growing_buffer ? FFMAX(s->mb_width*s->mb_height*64+10000, avctx->internal->byte_buffer_size) - AV_INPUT_BUFFER_PADDING_SIZE
                                               :
                                               s->mb_width*s->mb_height*(MAX_MB_BYTES+100)+10000;
+        if ((ret = ff_mjpeg_add_icc_profile_size(avctx, s->new_picture.f, &pkt_size)) < 0)
+            return ret;
         if ((ret = ff_alloc_packet(avctx, pkt, pkt_size)) < 0)
             return ret;
         if (s->mb_info) {
diff --git a/tests/fate/image.mak b/tests/fate/image.mak
index c6374c7d8a..70be281411 100644
--- a/tests/fate/image.mak
+++ b/tests/fate/image.mak
@@ -337,9 +337,13 @@ fate-jpg-12bpp: CMD = framecrc -idct simple -i $(TARGET_SAMPLES)/jpg/12bpp.jpg -
 FATE_JPG += fate-jpg-jfif
 fate-jpg-jfif: CMD = framecrc -idct simple -i $(TARGET_SAMPLES)/jpg/20242.jpg
 
+FATE_JPG_TRANSCODE-$(call ENCDEC, MJPEG, IMAGE2) += fate-jpg-icc
+fate-jpg-icc: CMD = transcode png_pipe $(TARGET_SAMPLES)/png1/lena-int_rgb24.png mjpeg "-vf scale" "" "" "-show_frames"
+
 FATE_JPG-$(call DEMDEC, IMAGE2, MJPEG) += $(FATE_JPG)
 FATE_IMAGE += $(FATE_JPG-yes)
-fate-jpg: $(FATE_JPG-yes)
+FATE_IMAGE_TRANSCODE += $(FATE_JPG_TRANSCODE-yes)
+fate-jpg: $(FATE_JPG-yes) $(FATE_JPG_TRANSCODE-yes)
 
 FATE_JPEGLS += fate-jpegls-2bpc
 fate-jpegls-2bpc: CMD = framecrc -idct simple -i $(TARGET_SAMPLES)/jpegls/4.jls
diff --git a/tests/ref/fate/jpg-icc b/tests/ref/fate/jpg-icc
new file mode 100644
index 0000000000..220146555e
--- /dev/null
+++ b/tests/ref/fate/jpg-icc
@@ -0,0 +1,42 @@
+0a323df5cdfb9574e329b9831be054a6 *tests/data/fate/jpg-icc.mjpeg
+11010 tests/data/fate/jpg-icc.mjpeg
+#tb 0: 1/25
+#media_type 0: video
+#codec_id 0: rawvideo
+#dimensions 0: 128x128
+#sar 0: 1/1
+0,          0,          0,        1,    49152, 0xaac06b42
+[FRAME]
+media_type=video
+stream_index=0
+key_frame=1
+pts=0
+pts_time=0.000000
+pkt_dts=0
+pkt_dts_time=0.000000
+best_effort_timestamp=0
+best_effort_timestamp_time=0.000000
+pkt_duration=1
+pkt_duration_time=0.040000
+pkt_pos=0
+pkt_size=11010
+width=128
+height=128
+pix_fmt=yuvj444p
+sample_aspect_ratio=1:1
+pict_type=I
+coded_picture_number=0
+display_picture_number=0
+interlaced_frame=0
+top_field_first=0
+repeat_pict=0
+color_range=pc
+color_space=bt470bg
+color_primaries=unknown
+color_transfer=unknown
+chroma_location=center
+[SIDE_DATA]
+side_data_type=ICC profile
+size=3144
+[/SIDE_DATA]
+[/FRAME]
-- 
2.35.1

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^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: [FFmpeg-devel] [PATCH v6 2/2] avcodec/mjpegenc: support writing ICC profiles
  2022-03-24 15:20 ` [FFmpeg-devel] [PATCH v6 2/2] avcodec/mjpegenc: support writing ICC profiles Niklas Haas
@ 2022-03-24 18:12   ` Michael Niedermayer
  0 siblings, 0 replies; 3+ messages in thread
From: Michael Niedermayer @ 2022-03-24 18:12 UTC (permalink / raw)
  To: FFmpeg development discussions and patches


[-- Attachment #1.1: Type: text/plain, Size: 2634 bytes --]

On Thu, Mar 24, 2022 at 04:20:01PM +0100, Niklas Haas wrote:
> From: Niklas Haas <git@haasn.dev>
> 
> This is mostly straightforward. The major complication is that, as a
> result of the 16-bit chunk size limitation, ICC profiles may need to be
> split up into multiple chunks.
> 
> We also need to make sure to allocate enough extra space in the packet
> to fit the ICC profile, so modify both mpegvideo_enc.c and ljpegenc.c to
> take into account this extra overhead, failing cleanly if necessary.
> 
> Also add a FATE transcode test to ensure that the ICC profile gets
> written (and read) correctly. Note that this ICC profile is smaller than
> 64 kB, so this doesn't test the APP2 chunk re-arranging code at all.
> 
> Signed-off-by: Niklas Haas <git@haasn.dev>
> ---
> Difference to v2:
> - Added proper packet overhead size accounting
> - Moved ICC-profile-too-large bailout to allocation
> - Removed unnecessary `!frame` check
> - Use only legal static initializers
> - Use SIZE_SPECIFIER instead of %zu
> - Check for overflow
> - Add ffprobe dependency
> - Use byte-aligned pointer writing code instead of putbit
> ---
>  libavcodec/ljpegenc.c        |  6 ++--
>  libavcodec/mjpegenc.c        |  3 +-
>  libavcodec/mjpegenc_common.c | 66 ++++++++++++++++++++++++++++++++++--
>  libavcodec/mjpegenc_common.h |  4 ++-
>  libavcodec/mpegvideo_enc.c   |  4 ++-
>  tests/fate/image.mak         |  6 +++-
>  tests/ref/fate/jpg-icc       | 42 +++++++++++++++++++++++
>  7 files changed, 122 insertions(+), 9 deletions(-)
>  create mode 100644 tests/ref/fate/jpg-icc

[...]
> diff --git a/libavcodec/mjpegenc_common.c b/libavcodec/mjpegenc_common.c
> index 7b82644763..17103051a8 100644
> --- a/libavcodec/mjpegenc_common.c
> +++ b/libavcodec/mjpegenc_common.c
> @@ -131,8 +131,39 @@ static void jpeg_table_header(AVCodecContext *avctx, PutBitContext *p,
>      AV_WB16(ptr, size);
>  }
>  
> -static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p)
> +static const uint8_t icc_hdr_size = 16; /* ICC_PROFILE\0 tag + 4 bytes */

> +static const uint16_t icc_chunk_size = UINT16_MAX - icc_hdr_size;

libavcodec/mjpegenc_common.c:135:40: error: initializer element is not constant
 static const uint16_t icc_chunk_size = UINT16_MAX - icc_hdr_size;
                                        ^
CC	libavcodec/mp3_header_decompress_bsf.o


[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Dictatorship naturally arises out of democracy, and the most aggravated
form of tyranny and slavery out of the most extreme liberty. -- Plato

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[-- Attachment #2: Type: text/plain, Size: 251 bytes --]

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^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-03-24 18:12 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-03-24 15:19 [FFmpeg-devel] [PATCH v6 1/2] avcodec/pngenc: support writing iCCP chunks Niklas Haas
2022-03-24 15:20 ` [FFmpeg-devel] [PATCH v6 2/2] avcodec/mjpegenc: support writing ICC profiles Niklas Haas
2022-03-24 18:12   ` Michael Niedermayer

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