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[FFmpeg-devel] avformat/mxfdec: Read color metadata from MXF

Message ID 5BCA187A-69EC-4E2A-9768-B400A35E8DB6@codex.online
State Superseded
Headers show
Series [FFmpeg-devel] avformat/mxfdec: Read color metadata from MXF
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Commit Message

Harry Mallon July 30, 2020, 3 p.m. UTC
Hello,

Sorry I wasn't able to send this with git-send-email, I'm trying again with patch inline. The following patch adds reading colour metadata (transfer, primaries and colour space) from standard MXF files. I wrote it without seeing the other patch but it turned out very similar to this one that was never merged https://patchwork.ffmpeg.org/project/ffmpeg/patch/1474694344-31167-1-git-send-email-steven@strobe.cc/ .

Thanks.
Harry

From 3ff4c4187654e92a84ce165365e339995512c5be Mon Sep 17 00:00:00 2001

From: Harry Mallon <harry.mallon@codex.online>
Date: Mon, 27 Jul 2020 15:52:17 +0100
Subject: [PATCH 1/2] avformat/mxfdec: Read color metadata from MXF

Reads color_primaries, color_trc and color_space from mxf
headers. ULs are from https://registry.smpte-ra.org/ site.

Signed-off-by: Harry Mallon <harry.mallon@codex.online>
---
 libavformat/mxf.c    | 49 ++++++++++++++++++++++++++++++++++++++++++++
 libavformat/mxf.h    |  3 +++
 libavformat/mxfdec.c | 15 ++++++++++++++
 3 files changed, 67 insertions(+)
diff mbox series

Patch

diff --git a/libavformat/mxf.c b/libavformat/mxf.c
index 7d154ca9d3..e51fc48a84 100644
--- a/libavformat/mxf.c
+++ b/libavformat/mxf.c
@@ -86,6 +86,55 @@  const MXFCodecUL ff_mxf_codec_tag_uls[] = {
     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0,                         0 },
 };
 
+const MXFCodecUL ff_mxf_color_primaries_uls[] = {
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x06,0x04,0x01,0x01,0x01,0x03,0x01,0x00,0x00 }, 14, AVCOL_PRI_SMPTE170M }, /* SMPTE 170M */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x06,0x04,0x01,0x01,0x01,0x03,0x02,0x00,0x00 }, 14, AVCOL_PRI_BT470BG }, /* ITU-R BT.470 PAL */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x06,0x04,0x01,0x01,0x01,0x03,0x03,0x00,0x00 }, 14, AVCOL_PRI_BT709 }, /* ITU-R BT.709 */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0D,0x04,0x01,0x01,0x01,0x03,0x04,0x00,0x00 }, 14, AVCOL_PRI_BT2020 }, /* ITU-R BT.2020 */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0D,0x04,0x01,0x01,0x01,0x03,0x05,0x00,0x00 }, 14, AVCOL_PRI_SMPTE428 }, /* SMPTE-DC28 DCDM */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0D,0x04,0x01,0x01,0x01,0x03,0x06,0x00,0x00 }, 14, AVCOL_PRI_SMPTE432 }, /* P3D65 */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0D,0x04,0x01,0x01,0x01,0x03,0x08,0x00,0x00 }, 14, AVCOL_PRI_SMPTE428 }, /* Cinema Mezzanine */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0D,0x04,0x01,0x01,0x01,0x03,0x0a,0x00,0x00 }, 14, AVCOL_PRI_SMPTE431 }, /* P3DCI */
+    /* alternate mappings for encoding */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x06,0x04,0x01,0x01,0x01,0x03,0x01,0x00,0x00 }, 14, AVCOL_PRI_SMPTE240M }, /* = AVCOL_PRI_SMPTE170M */
+
+    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0, AVCOL_PRI_UNSPECIFIED },
+};
+
+const MXFCodecUL ff_mxf_color_trc_uls[] = {
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x01,0x00,0x00 }, 14, AVCOL_TRC_GAMMA22 }, /* ITU-R BT.470 */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x02,0x00,0x00 }, 14, AVCOL_TRC_BT709 }, /* ITU-R BT.709 */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x03,0x00,0x00 }, 14, AVCOL_TRC_SMPTE240M }, /* SMPTE 240M */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x04,0x00,0x00 }, 14, AVCOL_TRC_BT709 }, /* SMPTE 274/296M (must appear after ITU-R BT.709) */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x06,0x04,0x01,0x01,0x01,0x01,0x05,0x00,0x00 }, 14, AVCOL_TRC_BT1361_ECG }, /* ITU-R BT.1361 */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x06,0x04,0x01,0x01,0x01,0x01,0x06,0x00,0x00 }, 14, AVCOL_TRC_LINEAR }, /* Linear */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x08,0x04,0x01,0x01,0x01,0x01,0x07,0x00,0x00 }, 14, AVCOL_TRC_SMPTE428 }, /* SMPTE-DC28 DCDM */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0D,0x04,0x01,0x01,0x01,0x01,0x08,0x00,0x00 }, 14, AVCOL_TRC_IEC61966_2_4 }, /* IEC 61966-2-4 xvYCC */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0E,0x04,0x01,0x01,0x01,0x01,0x09,0x00,0x00 }, 14, AVCOL_TRC_BT2020_10 }, /* ITU-R BT.2020 */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0D,0x04,0x01,0x01,0x01,0x01,0x0A,0x00,0x00 }, 14, AVCOL_TRC_SMPTE2084 }, /* SMPTE ST 2084 */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0D,0x04,0x01,0x01,0x01,0x01,0x0B,0x00,0x00 }, 14, AVCOL_TRC_ARIB_STD_B67 }, /* Hybrid Log-Gamma OETF */
+    /* alternate mappings for encoding */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x01,0x00,0x00 }, 14, AVCOL_TRC_GAMMA28 }, /* = AVCOL_TRC_GAMMA22 */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x02,0x00,0x00 }, 14, AVCOL_TRC_SMPTE170M }, /* = AVCOL_TRC_BT709 */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0E,0x04,0x01,0x01,0x01,0x01,0x09,0x00,0x00 }, 14, AVCOL_TRC_BT2020_12 }, /* = AVCOL_TRC_BT2020_10 */
+
+    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0, AVCOL_TRC_UNSPECIFIED },
+};
+
+/* aka Coding Equations */
+const MXFCodecUL ff_mxf_color_space_uls[] = {
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x02,0x01,0x00,0x00 }, 14, AVCOL_SPC_BT470BG }, /* ITU-R BT.601 */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x02,0x02,0x00,0x00 }, 14, AVCOL_SPC_BT709 }, /* ITU-R BT.709 */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x06,0x04,0x01,0x01,0x01,0x02,0x03,0x00,0x00 }, 14, AVCOL_SPC_SMPTE240M }, /* SMPTE 240M */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0D,0x04,0x01,0x01,0x01,0x02,0x04,0x00,0x00 }, 14, AVCOL_SPC_YCGCO }, /* YCgCo */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0D,0x04,0x01,0x01,0x01,0x02,0x05,0x00,0x00 }, 14, AVCOL_SPC_RGB }, /* GBR */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0D,0x04,0x01,0x01,0x01,0x02,0x06,0x00,0x00 }, 14, AVCOL_SPC_BT2020_NCL }, /* ITU-R BT.2020 Non-Constant Luminance */
+    /* alternate mappings for encoding */
+    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x06,0x04,0x01,0x01,0x01,0x02,0x03,0x00,0x00 }, 14, AVCOL_SPC_SMPTE170M }, /* = AVCOL_SPC_SMPTE240M */
+
+    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0, AVCOL_SPC_UNSPECIFIED },
+};
+
 static const struct {
     enum AVPixelFormat pix_fmt;
     const char data[16];
diff --git a/libavformat/mxf.h b/libavformat/mxf.h
index f2fff2781e..fc587f19f0 100644
--- a/libavformat/mxf.h
+++ b/libavformat/mxf.h
@@ -91,6 +91,9 @@  extern const MXFCodecUL ff_mxf_data_definition_uls[];
 extern const MXFCodecUL ff_mxf_codec_uls[];
 extern const MXFCodecUL ff_mxf_pixel_format_uls[];
 extern const MXFCodecUL ff_mxf_codec_tag_uls[];
+extern const MXFCodecUL ff_mxf_color_primaries_uls[];
+extern const MXFCodecUL ff_mxf_color_trc_uls[];
+extern const MXFCodecUL ff_mxf_color_space_uls[];
 
 int ff_mxf_decode_pixel_layout(const char pixel_layout[16], enum AVPixelFormat *pix_fmt);
 int ff_mxf_get_content_package_rate(AVRational time_base);
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index f0975f409e..4b56984b77 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -207,6 +207,9 @@  typedef struct MXFDescriptor {
     uint8_t *extradata;
     int extradata_size;
     enum AVPixelFormat pix_fmt;
+    UID color_primaries_ul;
+    UID color_trc_ul;
+    UID color_space_ul;
 } MXFDescriptor;
 
 typedef struct MXFIndexTableSegment {
@@ -1201,9 +1204,18 @@  static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int
         descriptor->aspect_ratio.num = avio_rb32(pb);
         descriptor->aspect_ratio.den = avio_rb32(pb);
         break;
+    case 0x3210:
+        avio_read(pb, descriptor->color_trc_ul, 16);
+        break;
     case 0x3212:
         descriptor->field_dominance = avio_r8(pb);
         break;
+    case 0x3219:
+        avio_read(pb, descriptor->color_primaries_ul, 16);
+        break;
+    case 0x321A:
+        avio_read(pb, descriptor->color_space_ul, 16);
+        break;
     case 0x3301:
         descriptor->component_depth = avio_rb32(pb);
         break;
@@ -2480,6 +2492,9 @@  static int mxf_parse_structural_metadata(MXFContext *mxf)
             }
             if (descriptor->aspect_ratio.num && descriptor->aspect_ratio.den)
                 st->display_aspect_ratio = descriptor->aspect_ratio;
+            st->codecpar->color_primaries = mxf_get_codec_ul(ff_mxf_color_primaries_uls, &descriptor->color_primaries_ul)->id;
+            st->codecpar->color_trc       = mxf_get_codec_ul(ff_mxf_color_trc_uls, &descriptor->color_trc_ul)->id;
+            st->codecpar->color_space     = mxf_get_codec_ul(ff_mxf_color_space_uls, &descriptor->color_space_ul)->id;
         } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
             container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
             /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */