Update ffmpeg to 7.1.1

submodules/ffmpeg/Sources/FFMpeg/ffmpeg-7.1.1/libavcodec/flvdec.c

@@ -0,0 +1,127 @@
+/*
+ * FLV decoding.
+ *
+ * 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/imgutils.h"
+
+#include "codec_internal.h"
+#include "flvdec.h"
+#include "h263dec.h"
+#include "mpegvideo.h"
+#include "mpegvideodec.h"
+
+int ff_flv_decode_picture_header(MpegEncContext *s)
+{
+    int format, width, height;
+
+    /* picture header */
+    if (get_bits(&s->gb, 17) != 1) {
+        av_log(s->avctx, AV_LOG_ERROR, "Bad picture start code\n");
+        return AVERROR_INVALIDDATA;
+    }
+    format = get_bits(&s->gb, 5);
+    if (format != 0 && format != 1) {
+        av_log(s->avctx, AV_LOG_ERROR, "Bad picture format\n");
+        return AVERROR_INVALIDDATA;
+    }
+    s->h263_flv       = format + 1;
+    s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */
+    format            = get_bits(&s->gb, 3);
+    switch (format) {
+    case 0:
+        width  = get_bits(&s->gb, 8);
+        height = get_bits(&s->gb, 8);
+        break;
+    case 1:
+        width  = get_bits(&s->gb, 16);
+        height = get_bits(&s->gb, 16);
+        break;
+    case 2:
+        width  = 352;
+        height = 288;
+        break;
+    case 3:
+        width  = 176;
+        height = 144;
+        break;
+    case 4:
+        width  = 128;
+        height = 96;
+        break;
+    case 5:
+        width  = 320;
+        height = 240;
+        break;
+    case 6:
+        width  = 160;
+        height = 120;
+        break;
+    default:
+        width = height = 0;
+        break;
+    }
+    if (av_image_check_size(width, height, 0, s->avctx))
+        return AVERROR(EINVAL);
+    s->width  = width;
+    s->height = height;
+
+    s->pict_type = AV_PICTURE_TYPE_I + get_bits(&s->gb, 2);
+    s->droppable = s->pict_type > AV_PICTURE_TYPE_P;
+    if (s->droppable)
+        s->pict_type = AV_PICTURE_TYPE_P;
+
+    skip_bits1(&s->gb); /* deblocking flag */
+    s->chroma_qscale = s->qscale = get_bits(&s->gb, 5);
+
+    s->h263_plus = 0;
+
+    s->h263_long_vectors = 0;
+
+    /* PEI */
+    if (skip_1stop_8data_bits(&s->gb) < 0)
+        return AVERROR_INVALIDDATA;
+
+    s->f_code = 1;
+
+    if (s->ehc_mode)
+        s->avctx->sample_aspect_ratio= (AVRational){1,2};
+
+    if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
+        av_log(s->avctx, AV_LOG_DEBUG, "%c esc_type:%d, qp:%d num:%d\n",
+               s->droppable ? 'D' : av_get_picture_type_char(s->pict_type),
+               s->h263_flv - 1, s->qscale, s->picture_number);
+    }
+
+    return 0;
+}
+
+const FFCodec ff_flv_decoder = {
+    .p.name         = "flv",
+    CODEC_LONG_NAME("FLV / Sorenson Spark / Sorenson H.263 (Flash Video)"),
+    .p.type         = AVMEDIA_TYPE_VIDEO,
+    .p.id           = AV_CODEC_ID_FLV1,
+    .priv_data_size = sizeof(MpegEncContext),
+    .init           = ff_h263_decode_init,
+    FF_CODEC_DECODE_CB(ff_h263_decode_frame),
+    .close          = ff_mpv_decode_close,
+    .p.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1,
+    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP |
+                      FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
+    .p.max_lowres   = 3,
+};