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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /media/ffvpx/libavcodec/vp8_parser.c
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--media/ffvpx/libavcodec/vp8_parser.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/vp8_parser.c b/media/ffvpx/libavcodec/vp8_parser.c
new file mode 100644
index 0000000000..98b752bfb9
--- /dev/null
+++ b/media/ffvpx/libavcodec/vp8_parser.c
@@ -0,0 +1,79 @@
+/*
+ * 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 "avcodec.h"
+
+static int parse(AVCodecParserContext *s,
+ AVCodecContext *avctx,
+ const uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size)
+{
+ unsigned int frame_type;
+ unsigned int profile;
+
+ *poutbuf = buf;
+ *poutbuf_size = buf_size;
+
+ if (buf_size < 3)
+ return buf_size;
+
+ frame_type = buf[0] & 1;
+ profile = (buf[0] >> 1) & 7;
+ if (profile > 3) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid profile %u.\n", profile);
+ return buf_size;
+ }
+
+ avctx->profile = profile;
+ s->key_frame = frame_type == 0;
+ s->pict_type = frame_type ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
+ s->format = AV_PIX_FMT_YUV420P;
+ s->field_order = AV_FIELD_PROGRESSIVE;
+ s->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
+
+ if (frame_type == 0) {
+ unsigned int sync_code;
+ unsigned int width, height;
+
+ if (buf_size < 10)
+ return buf_size;
+
+ sync_code = AV_RL24(buf + 3);
+ if (sync_code != 0x2a019d) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid sync code %06x.\n", sync_code);
+ return buf_size;
+ }
+
+ width = AV_RL16(buf + 6) & 0x3fff;
+ height = AV_RL16(buf + 8) & 0x3fff;
+
+ s->width = width;
+ s->height = height;
+ s->coded_width = FFALIGN(width, 16);
+ s->coded_height = FFALIGN(height, 16);
+ }
+
+ return buf_size;
+}
+
+const AVCodecParser ff_vp8_parser = {
+ .codec_ids = { AV_CODEC_ID_VP8 },
+ .parser_parse = parse,
+};