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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /media/ffvpx/libavcodec/av1_parse.c
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'media/ffvpx/libavcodec/av1_parse.c')
-rw-r--r--media/ffvpx/libavcodec/av1_parse.c122
1 files changed, 122 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/av1_parse.c b/media/ffvpx/libavcodec/av1_parse.c
new file mode 100644
index 0000000000..061636815f
--- /dev/null
+++ b/media/ffvpx/libavcodec/av1_parse.c
@@ -0,0 +1,122 @@
+/*
+ * AV1 common parsing code
+ *
+ * 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 "config.h"
+
+#include "libavutil/mem.h"
+
+#include "av1.h"
+#include "av1_parse.h"
+#include "bytestream.h"
+
+int ff_av1_extract_obu(AV1OBU *obu, const uint8_t *buf, int length, void *logctx)
+{
+ int64_t obu_size;
+ int start_pos, type, temporal_id, spatial_id;
+ int len;
+
+ len = parse_obu_header(buf, length, &obu_size, &start_pos,
+ &type, &temporal_id, &spatial_id);
+ if (len < 0)
+ return len;
+
+ obu->type = type;
+ obu->temporal_id = temporal_id;
+ obu->spatial_id = spatial_id;
+
+ obu->data = buf + start_pos;
+ obu->size = obu_size;
+ obu->raw_data = buf;
+ obu->raw_size = len;
+
+ av_log(logctx, AV_LOG_DEBUG,
+ "obu_type: %d, temporal_id: %d, spatial_id: %d, payload size: %d\n",
+ obu->type, obu->temporal_id, obu->spatial_id, obu->size);
+
+ return len;
+}
+
+int ff_av1_packet_split(AV1Packet *pkt, const uint8_t *buf, int length, void *logctx)
+{
+ GetByteContext bc;
+ int consumed;
+
+ bytestream2_init(&bc, buf, length);
+ pkt->nb_obus = 0;
+
+ while (bytestream2_get_bytes_left(&bc) > 0) {
+ AV1OBU *obu;
+
+ if (pkt->obus_allocated < pkt->nb_obus + 1) {
+ int new_size = pkt->obus_allocated + 1;
+ AV1OBU *tmp;
+
+ if (new_size >= INT_MAX / sizeof(*tmp))
+ return AVERROR(ENOMEM);
+ tmp = av_fast_realloc(pkt->obus, &pkt->obus_allocated_size, new_size * sizeof(*tmp));
+ if (!tmp)
+ return AVERROR(ENOMEM);
+
+ pkt->obus = tmp;
+ memset(pkt->obus + pkt->obus_allocated, 0, sizeof(*pkt->obus));
+ pkt->obus_allocated = new_size;
+ }
+ obu = &pkt->obus[pkt->nb_obus];
+
+ consumed = ff_av1_extract_obu(obu, bc.buffer, bytestream2_get_bytes_left(&bc), logctx);
+ if (consumed < 0)
+ return consumed;
+
+ bytestream2_skip(&bc, consumed);
+
+ obu->size_bits = get_obu_bit_length(obu->data, obu->size, obu->type);
+
+ if (obu->size_bits < 0 ||
+ (obu->size_bits == 0 && (obu->type != AV1_OBU_TEMPORAL_DELIMITER &&
+ obu->type != AV1_OBU_PADDING))) {
+ av_log(logctx, AV_LOG_ERROR, "Invalid OBU of type %d, skipping.\n", obu->type);
+ continue;
+ }
+
+ pkt->nb_obus++;
+ }
+
+ return 0;
+}
+
+void ff_av1_packet_uninit(AV1Packet *pkt)
+{
+ av_freep(&pkt->obus);
+ pkt->obus_allocated = pkt->obus_allocated_size = 0;
+}
+
+AVRational ff_av1_framerate(int64_t ticks_per_frame, int64_t units_per_tick,
+ int64_t time_scale)
+{
+ AVRational fr;
+
+ if (ticks_per_frame && units_per_tick && time_scale &&
+ ticks_per_frame < INT64_MAX / units_per_tick &&
+ av_reduce(&fr.den, &fr.num, units_per_tick * ticks_per_frame,
+ time_scale, INT_MAX))
+ return fr;
+
+ return (AVRational){ 0, 1 };
+}