lavc: add a ProRes RAW parser

Simple parser that only parses frame information.
This helps avoid requiring the software decoder on init to decode a
single frame, since the decoder can be quite slow.

libavcodec/Makefile

@@ -1254,6 +1254,7 @@ OBJS-$(CONFIG_MPEGVIDEO_PARSER)        += mpegvideo_parser.o    \
 OBJS-$(CONFIG_OPUS_PARSER)             += vorbis_data.o
 OBJS-$(CONFIG_PNG_PARSER)              += png_parser.o
 OBJS-$(CONFIG_PNM_PARSER)              += pnm_parser.o pnm.o
+OBJS-$(CONFIG_PRORES_RAW_PARSER)       += prores_raw_parser.o
 OBJS-$(CONFIG_QOI_PARSER)              += qoi_parser.o
 OBJS-$(CONFIG_RV34_PARSER)             += rv34_parser.o
 OBJS-$(CONFIG_SBC_PARSER)              += sbc_parser.o

libavcodec/parsers.c

@@ -68,6 +68,7 @@ extern const AVCodecParser ff_mpegvideo_parser;
 extern const AVCodecParser ff_opus_parser;
 extern const AVCodecParser ff_png_parser;
 extern const AVCodecParser ff_pnm_parser;
+extern const AVCodecParser ff_prores_raw_parser;
 extern const AVCodecParser ff_qoi_parser;
 extern const AVCodecParser ff_rv34_parser;
 extern const AVCodecParser ff_sbc_parser;

libavcodec/prores_raw_parser.c

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2025 Lynne <dev@lynne.ee>
+ *
+ * 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 "parser.h"
+#include "bytestream.h"
+
+static int prores_raw_parse(AVCodecParserContext *s, AVCodecContext *avctx,
+                            const uint8_t **poutbuf, int *poutbuf_size,
+                            const uint8_t *buf, int buf_size)
+{
+    GetByteContext gb;
+
+    switch (avctx->codec_tag) {
+    case 0:
+        break;
+    case MKTAG('a','p','r','n'):
+        avctx->profile = AV_PROFILE_PRORES_RAW;
+        break;
+    case MKTAG('a','p','r','h'):
+        avctx->profile = AV_PROFILE_PRORES_RAW_HQ;
+        break;
+    default:
+        avpriv_request_sample(avctx, "Profile %d", avctx->codec_tag);
+        return buf_size;
+        break;
+    }
+
+    bytestream2_init(&gb, buf, buf_size);
+    if (bytestream2_get_be32(&gb) != buf_size) /* Packet size */
+        return buf_size;
+
+    if (bytestream2_get_le32(&gb) != MKTAG('p','r','r','f')) /* Frame header */
+        return buf_size;
+
+    int header_size = bytestream2_get_be16(&gb);
+    if (header_size < 62)
+        return buf_size;
+
+    bytestream2_skip(&gb, 1);
+    int version = bytestream2_get_byte(&gb);
+    if (version > 1) {
+        avpriv_request_sample(avctx, "Version %d", version);
+        return buf_size;
+    }
+
+    /* Vendor header (e.g. "peac" for Panasonic or "atm0" for Atmos) */
+    bytestream2_skip(&gb, 4);
+
+    s->width = bytestream2_get_be16(&gb);
+    s->height = bytestream2_get_be16(&gb);
+    s->coded_width  = FFALIGN(s->width, 16);
+    s->coded_height = FFALIGN(s->height, 16);
+    s->format = AV_PIX_FMT_BAYER_RGGB16;
+    s->key_frame = 1;
+    s->pict_type = AV_PICTURE_TYPE_I;
+    s->field_order = AV_FIELD_PROGRESSIVE;
+    s->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
+
+    /* This parser only performs analysis */
+    *poutbuf      = buf;
+    *poutbuf_size = buf_size;
+
+    return buf_size;
+}
+
+const AVCodecParser ff_prores_raw_parser = {
+    .codec_ids      = { AV_CODEC_ID_PRORES_RAW },
+    .parser_parse   = prores_raw_parse,
+};

libavformat/mov.c

@@ -2989,6 +2989,7 @@ static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
     case AV_CODEC_ID_VP9:
         sti->need_parsing = AVSTREAM_PARSE_FULL;
         break;
+    case AV_CODEC_ID_PRORES_RAW:
     case AV_CODEC_ID_APV:
     case AV_CODEC_ID_EVC:
     case AV_CODEC_ID_AV1: