PNGEncContext *s = avctx->priv_data;
AVFrame * const p= &s->picture;
int bit_depth, color_type, y, len, row_size, ret, is_progressive;
- int bits_per_pixel, pass_row_size, max_packet_size;
+ int bits_per_pixel, pass_row_size, enc_row_size;
+ int64_t max_packet_size;
int compression_level;
uint8_t *ptr, *top;
uint8_t *crow_base = NULL, *crow_buf, *crow;
p->pict_type= AV_PICTURE_TYPE_I;
p->key_frame= 1;
- max_packet_size = avctx->width * avctx->height * 9 + FF_MIN_BUFFER_SIZE;
- if ((ret = ff_alloc_packet2(avctx, pkt, max_packet_size)) < 0) {
- return ret;
- }
-
- s->bytestream_start =
- s->bytestream = pkt->data;
- s->bytestream_end = pkt->data + pkt->size;
-
is_progressive = !!(avctx->flags & CODEC_FLAG_INTERLACED_DCT);
switch(avctx->pix_fmt) {
case PIX_FMT_RGBA64BE:
Z_DEFLATED, 15, 8, Z_DEFAULT_STRATEGY);
if (ret != Z_OK)
return -1;
+
+ enc_row_size = deflateBound(&s->zstream, row_size);
+ max_packet_size = avctx->height * (int64_t)(enc_row_size +
+ ((enc_row_size + IOBUF_SIZE - 1) / IOBUF_SIZE) * 12)
+ + FF_MIN_BUFFER_SIZE;
+ if (max_packet_size > INT_MAX)
+ return AVERROR(ENOMEM);
+ if ((ret = ff_alloc_packet2(avctx, pkt, max_packet_size)) < 0)
+ return ret;
+
+ s->bytestream_start =
+ s->bytestream = pkt->data;
+ s->bytestream_end = pkt->data + pkt->size;
+
crow_base = av_malloc((row_size + 32) << (s->filter_type == PNG_FILTER_VALUE_MIXED));
if (!crow_base)
goto fail;
.priv_data_size = sizeof(PNGEncContext),
.init = png_enc_init,
.encode2 = encode_frame,
- .pix_fmts= (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGBA,
- PIX_FMT_RGB48BE, PIX_FMT_RGBA64BE,
- PIX_FMT_PAL8,
- PIX_FMT_GRAY8, PIX_FMT_GRAY8A,
- PIX_FMT_GRAY16BE,
- PIX_FMT_MONOBLACK, PIX_FMT_NONE},
- .long_name= NULL_IF_CONFIG_SMALL("PNG (Portable Network Graphics) image"),
+ .pix_fmts = (const enum PixelFormat[]){
+ PIX_FMT_RGB24, PIX_FMT_RGBA,
+ PIX_FMT_RGB48BE, PIX_FMT_RGBA64BE,
+ PIX_FMT_PAL8,
+ PIX_FMT_GRAY8, PIX_FMT_GRAY8A,
+ PIX_FMT_GRAY16BE,
+ PIX_FMT_MONOBLACK, PIX_FMT_NONE
+ },
+ .long_name = NULL_IF_CONFIG_SMALL("PNG (Portable Network Graphics) image"),
};