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pngdec: use av_fast_padded_malloc(z)

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2013-08-22 17:05:53 +00:00
parent 8fbf940e16
commit dd1d29bd5f
1 changed files with 11 additions and 7 deletions
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18
libavcodec/pngdec.c
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@ -60,7 +60,10 @@ typedef struct PNGDecContext {
uint32_t palette[256];
uint8_t *crow_buf;
uint8_t *last_row;
int last_row_size;
uint8_t *tmp_row;
uint8_t *buffer;
int buffer_size;
int pass;
int crow_size; /* compressed row size (include filter type) */
int row_size; /* decompressed row size */
@ -509,7 +512,6 @@ static int decode_frame(AVCodecContext *avctx,
int buf_size = avpkt->size;
AVFrame *p;
AVDictionary *metadata = NULL;
uint8_t *crow_buf_base = NULL;
uint32_t tag, length;
int64_t sig;
int ret;
@ -667,7 +669,7 @@ static int decode_frame(AVCodecContext *avctx,
if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
memcpy(p->data[1], s->palette, 256 * sizeof(uint32_t));
/* empty row is used if differencing to the first row */
s->last_row = av_mallocz(s->row_size);
av_fast_padded_mallocz(&s->last_row, &s->last_row_size, s->row_size);
if (!s->last_row)
goto fail;
if (s->interlace_type ||
@ -677,12 +679,12 @@ static int decode_frame(AVCodecContext *avctx,
goto fail;
}
/* compressed row */
crow_buf_base = av_malloc(s->row_size + 16);
if (!crow_buf_base)
av_fast_padded_malloc(&s->buffer, &s->buffer_size, s->row_size + 16);
if (!s->buffer)
goto fail;
/* we want crow_buf+1 to be 16-byte aligned */
s->crow_buf = crow_buf_base + 15;
s->crow_buf = s->buffer + 15;
s->zstream.avail_out = s->crow_size;
s->zstream.next_out = s->crow_buf;
}
@ -861,9 +863,7 @@ static int decode_frame(AVCodecContext *avctx,
ret = bytestream2_tell(&s->gb);
the_end:
inflateEnd(&s->zstream);
av_free(crow_buf_base);
s->crow_buf = NULL;
av_freep(&s->last_row);
av_freep(&s->tmp_row);
return ret;
fail:
@ -914,6 +914,10 @@ static av_cold int png_dec_end(AVCodecContext *avctx)
av_frame_free(&s->last_picture.f);
ff_thread_release_buffer(avctx, &s->picture);
av_frame_free(&s->picture.f);
av_freep(&s->buffer);
s->buffer_size = 0;
av_freep(&s->last_row);
s->last_row_size = 0;
return 0;
}