---
libavcodec/webp.c | 143 +++++++++++++++++++++++-----------------------
1 file changed, 71 insertions(+), 72 deletions(-)
diff --git a/libavcodec/webp.c b/libavcodec/webp.c
index bee43fcf19..d3e3f85dd3 100644
--- a/libavcodec/webp.c
+++ b/libavcodec/webp.c
@@ -1337,7 +1337,77 @@ static int vp8_lossy_decode_frame(AVCodecContext *avctx,
AVFrame *p,
}
return ret;
}
-int init_canvas_frame(WebPContext *s, int format, int key_frame);
+
+static int init_canvas_frame(WebPContext *s, int format, int key_frame)
+{
+ AVFrame *canvas = s->canvas_frame.f;
+ int height;
+ int ret;
+
+ // canvas is needed only for animation
+ if (!(s->vp8x_flags & VP8X_FLAG_ANIMATION))
+ return 0;
+
+ // avoid init for non-key frames whose format and size did not change
+ if (!key_frame &&
+ canvas->data[0] &&
+ canvas->format == format &&
+ canvas->width == s->canvas_width &&
+ canvas->height == s->canvas_height)
+ return 0;
+
+ // canvas changes within IPPP sequences will loose thread sync
+ // because of the ThreadFrame reallocation and will wait forever
+ // so if frame-threading is used, forbid canvas changes and unlock
+ // previous frames
+ if (!key_frame && canvas->data[0]) {
+ if (s->avctx->thread_count > 1) {
+ av_log(s->avctx, AV_LOG_WARNING, "Canvas change detected. The output
will be damaged. Use -threads 1 to try decoding with best effort.\n");
+ // unlock previous frames that have sent an _await() call
+ ff_thread_report_progress(&s->canvas_frame, INT_MAX, 0);
+ return AVERROR_PATCHWELCOME;
+ } else {
+ // warn for damaged frames
+ av_log(s->avctx, AV_LOG_WARNING, "Canvas change detected. The output
will be damaged.\n");
+ }
+ }
+
+ s->avctx->pix_fmt = format;
+ canvas->format = format;
+ canvas->width = s->canvas_width;
+ canvas->height = s->canvas_height;
+
+ // VP8 decoder changed the width and height in AVCodecContext.
+ // Change it back to the canvas size.
+ ret = ff_set_dimensions(s->avctx, s->canvas_width, s->canvas_height);
+ if (ret < 0)
+ return ret;
+
+ ff_thread_release_ext_buffer(s->avctx, &s->canvas_frame);
+ ret = ff_thread_get_ext_buffer(s->avctx, &s->canvas_frame,
AV_GET_BUFFER_FLAG_REF);
+ if (ret < 0)
+ return ret;
+
+ if (canvas->format == AV_PIX_FMT_ARGB) {
+ height = canvas->height;
+ memset(canvas->data[0], 0, height * canvas->linesize[0]);
+ } else /* if (canvas->format == AV_PIX_FMT_YUVA420P) */ {
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(canvas->format);
+ for (int comp = 0; comp < desc->nb_components; comp++) {
+ int plane = desc->comp[comp].plane;
+
+ if (comp == 1 || comp == 2)
+ height = AV_CEIL_RSHIFT(canvas->height, desc->log2_chroma_h);
+ else
+ height = FFALIGN(canvas->height, 1 << desc->log2_chroma_h);
+
+ memset(canvas->data[plane], s->transparent_yuva[plane],
+ height * canvas->linesize[plane]);
+ }
+ }
+
+ return 0;
+}
static int webp_decode_frame_common(AVCodecContext *avctx, uint8_t *data, int size,
int *got_frame, int key_frame)
@@ -1577,77 +1647,6 @@ exif_end:
return size;
}
-int init_canvas_frame(WebPContext *s, int format, int key_frame)
-{
- AVFrame *canvas = s->canvas_frame.f;
- int height;
- int ret;
-
- // canvas is needed only for animation
- if (!(s->vp8x_flags & VP8X_FLAG_ANIMATION))
- return 0;
-
- // avoid init for non-key frames whose format and size did not change
- if (!key_frame &&
- canvas->data[0] &&
- canvas->format == format &&
- canvas->width == s->canvas_width &&
- canvas->height == s->canvas_height)
- return 0;
-
- // canvas changes within IPPP sequences will loose thread sync
- // because of the ThreadFrame reallocation and will wait forever
- // so if frame-threading is used, forbid canvas changes and unlock
- // previous frames
- if (!key_frame && canvas->data[0]) {
- if (s->avctx->thread_count > 1) {
- av_log(s->avctx, AV_LOG_WARNING, "Canvas change detected. The output
will be damaged. Use -threads 1 to try decoding with best effort.\n");
- // unlock previous frames that have sent an _await() call
- ff_thread_report_progress(&s->canvas_frame, INT_MAX, 0);
- return AVERROR_PATCHWELCOME;
- } else {
- // warn for damaged frames
- av_log(s->avctx, AV_LOG_WARNING, "Canvas change detected. The output
will be damaged.\n");
- }
- }
-
- s->avctx->pix_fmt = format;
- canvas->format = format;
- canvas->width = s->canvas_width;
- canvas->height = s->canvas_height;
-
- // VP8 decoder changed the width and height in AVCodecContext.
- // Change it back to the canvas size.
- ret = ff_set_dimensions(s->avctx, s->canvas_width, s->canvas_height);
- if (ret < 0)
- return ret;
-
- ff_thread_release_ext_buffer(s->avctx, &s->canvas_frame);
- ret = ff_thread_get_ext_buffer(s->avctx, &s->canvas_frame,
AV_GET_BUFFER_FLAG_REF);
- if (ret < 0)
- return ret;
-
- if (canvas->format == AV_PIX_FMT_ARGB) {
- height = canvas->height;
- memset(canvas->data[0], 0, height * canvas->linesize[0]);
- } else /* if (canvas->format == AV_PIX_FMT_YUVA420P) */ {
- const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(canvas->format);
- for (int comp = 0; comp < desc->nb_components; comp++) {
- int plane = desc->comp[comp].plane;
-
- if (comp == 1 || comp == 2)
- height = AV_CEIL_RSHIFT(canvas->height, desc->log2_chroma_h);
- else
- height = FFALIGN(canvas->height, 1 << desc->log2_chroma_h);
-
- memset(canvas->data[plane], s->transparent_yuva[plane],
- height * canvas->linesize[plane]);
- }
- }
-
- return 0;
-}
-
/*
* Blend src1 (foreground) and src2 (background) into dest, in ARGB format.
* width, height are the dimensions of src1
