[FFmpeg-devel] [PATCH v3 2/2] lavf: add prores bitstream demuxer and muxer

[hung kuishing]

Signed-off-by: clarkh <hungkuishing at outlook.com>
---
 libavformat/Makefile     |  2 ++
 libavformat/allformats.c |  2 ++
 libavformat/proresdec.c  | 66 ++++++++++++++++++++++++++++++++++++++++
 libavformat/rawenc.c     | 13 ++++++++
 4 files changed, 83 insertions(+)
 create mode 100644 libavformat/proresdec.c

diff --git a/libavformat/Makefile b/libavformat/Makefile
index bd78c206b9..16def0765b 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -480,6 +480,8 @@ OBJS-$(CONFIG_PDV_DEMUXER)               += pdvdec.o
 OBJS-$(CONFIG_PJS_DEMUXER)               += pjsdec.o subtitles.o
 OBJS-$(CONFIG_PMP_DEMUXER)               += pmpdec.o
 OBJS-$(CONFIG_PP_BNK_DEMUXER)            += pp_bnk.o
+OBJS-$(CONFIG_PRORES_DEMUXER)            += proresdec.o rawdec.o
+OBJS-$(CONFIG_PRORES_MUXER)              += rawenc.o
 OBJS-$(CONFIG_PVA_DEMUXER)               += pva.o
 OBJS-$(CONFIG_PVF_DEMUXER)               += pvfdec.o pcm.o
 OBJS-$(CONFIG_QCP_DEMUXER)               += qcp.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 6324952bd2..0b762034ca 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -378,6 +378,8 @@ extern const AVInputFormat  ff_pdv_demuxer;
 extern const AVInputFormat  ff_pjs_demuxer;
 extern const AVInputFormat  ff_pmp_demuxer;
 extern const AVInputFormat  ff_pp_bnk_demuxer;
+extern const AVInputFormat  ff_prores_demuxer;
+extern const FFOutputFormat ff_prores_muxer;
 extern const FFOutputFormat ff_psp_muxer;
 extern const AVInputFormat  ff_pva_demuxer;
 extern const AVInputFormat  ff_pvf_demuxer;
diff --git a/libavformat/proresdec.c b/libavformat/proresdec.c
new file mode 100644
index 0000000000..67f25b79ec
--- /dev/null
+++ b/libavformat/proresdec.c
@@ -0,0 +1,66 @@
+/*
+ * ProRes bitstream probe
+ * Copyright (c) 2023 clarkh <hungkuishing at outlook.com>
+ *
+ * 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 "libavutil/intreadwrite.h"
+#include "libavcodec/proresdata.h"
+#include "avformat.h"
+#include "rawdec.h"
+
+#define FRAME_FIXED_HEADER_SIZE 20
+
+static int prores_check_frame_header(const uint8_t *buf, const int data_size)
+{
+    int hdr_size, width, height;
+    int version, alpha_info;
+
+    hdr_size = AV_RB16(buf);
+    if (hdr_size < FRAME_FIXED_HEADER_SIZE)
+        return AVERROR_INVALIDDATA;
+
+    version = buf[3];
+    if (version > 1)
+        return AVERROR_INVALIDDATA;
+
+    width  = AV_RB16(buf + 8);
+    height = AV_RB16(buf + 10);
+    if (!width || !height)
+        return AVERROR_INVALIDDATA;
+
+    alpha_info = buf[17] & 0x0f;
+    if (alpha_info > 2)
+        return AVERROR_INVALIDDATA;
+
+    return 0;
+}
+
+static int prores_probe(const AVProbeData *p)
+{
+    // 8: frame_size(4B) + frame_identifier(4B)
+    if (p->buf_size < (8 + FRAME_FIXED_HEADER_SIZE) || AV_RB32(p->buf + 4) != FRAME_ID)
+        return 0;
+
+    if (prores_check_frame_header(p->buf + 8, p->buf_size - 8) < 0)
+        return 0;
+
+    return AVPROBE_SCORE_MAX;
+}
+
+FF_DEF_RAWVIDEO_DEMUXER(prores, "raw ProRes", prores_probe, "prores", AV_CODEC_ID_PRORES)
diff --git a/libavformat/rawenc.c b/libavformat/rawenc.c
index f916db13a2..28ca47ae70 100644
--- a/libavformat/rawenc.c
+++ b/libavformat/rawenc.c
@@ -538,6 +538,19 @@ const FFOutputFormat ff_obu_muxer = {
 };
 #endif
 
+#if CONFIG_PRORES_MUXER
+const FFOutputFormat ff_prores_muxer = {
+    .p.name            = "prores",
+    .p.long_name       = NULL_IF_CONFIG_SMALL("raw prores video"),
+    .p.extensions      = "prores",
+    .p.audio_codec     = AV_CODEC_ID_NONE,
+    .p.video_codec     = AV_CODEC_ID_PRORES,
+    .init              = force_one_stream,
+    .write_packet      = ff_raw_write_packet,
+    .p.flags           = AVFMT_NOTIMESTAMPS,
+};
+#endif
+
 #if CONFIG_RAWVIDEO_MUXER
 const FFOutputFormat ff_rawvideo_muxer = {
     .p.name            = "rawvideo",
-- 
2.34.1