}
/* NOTE: 'dst' can be equal to 'last' */
-static void png_filter_row(PNGDSPContext *dsp, uint8_t *dst, int filter_type,
- uint8_t *src, uint8_t *last, int size, int bpp)
+void ff_png_filter_row(PNGDSPContext *dsp, uint8_t *dst, int filter_type,
+ uint8_t *src, uint8_t *last, int size, int bpp)
{
int i, p, r, g, b, a;
else
last_row = ptr - s->image_linesize;
- png_filter_row(&s->dsp, ptr, s->crow_buf[0], s->crow_buf + 1,
- last_row, s->row_size, s->bpp);
+ ff_png_filter_row(&s->dsp, ptr, s->crow_buf[0], s->crow_buf + 1,
+ last_row, s->row_size, s->bpp);
/* loco lags by 1 row so that it doesn't interfere with top prediction */
if (s->filter_type == PNG_FILTER_TYPE_LOCO && s->y > 0) {
if (s->bit_depth == 16) {
* wait for the next one */
if (got_line)
break;
- png_filter_row(&s->dsp, s->tmp_row, s->crow_buf[0], s->crow_buf + 1,
- s->last_row, s->pass_row_size, s->bpp);
+ ff_png_filter_row(&s->dsp, s->tmp_row, s->crow_buf[0], s->crow_buf + 1,
+ s->last_row, s->pass_row_size, s->bpp);
FFSWAP(uint8_t *, s->last_row, s->tmp_row);
FFSWAP(unsigned int, s->last_row_size, s->tmp_row_size);
got_line = 1;
}
#endif
-#if CONFIG_LSCR_DECODER
-static int decode_frame_lscr(AVCodecContext *avctx,
- void *data, int *got_frame,
- AVPacket *avpkt)
-{
- PNGDecContext *const s = avctx->priv_data;
- GetByteContext *gb = &s->gb;
- AVFrame *frame = data;
- int ret, nb_blocks, offset = 0;
-
- if (avpkt->size < 2)
- return AVERROR_INVALIDDATA;
- if (avpkt->size == 2)
- return 0;
-
- bytestream2_init(gb, avpkt->data, avpkt->size);
-
- if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
- return ret;
-
- nb_blocks = bytestream2_get_le16(gb);
- if (bytestream2_get_bytes_left(gb) < 2 + nb_blocks * (12 + 8))
- return AVERROR_INVALIDDATA;
-
- if (s->last_picture.f->data[0]) {
- ret = av_frame_copy(frame, s->last_picture.f);
- if (ret < 0)
- return ret;
- }
-
- for (int b = 0; b < nb_blocks; b++) {
- int x, y, x2, y2, w, h, left;
- uint32_t csize, size;
-
- s->zstream.zalloc = ff_png_zalloc;
- s->zstream.zfree = ff_png_zfree;
- s->zstream.opaque = NULL;
-
- if ((ret = inflateInit(&s->zstream)) != Z_OK) {
- av_log(avctx, AV_LOG_ERROR, "inflateInit returned error %d\n", ret);
- ret = AVERROR_EXTERNAL;
- goto end;
- }
-
- bytestream2_seek(gb, 2 + b * 12, SEEK_SET);
-
- x = bytestream2_get_le16(gb);
- y = bytestream2_get_le16(gb);
- x2 = bytestream2_get_le16(gb);
- y2 = bytestream2_get_le16(gb);
- s->width = s->cur_w = w = x2-x;
- s->height = s->cur_h = h = y2-y;
-
- if (w <= 0 || x < 0 || x >= avctx->width || w + x > avctx->width ||
- h <= 0 || y < 0 || y >= avctx->height || h + y > avctx->height) {
- ret = AVERROR_INVALIDDATA;
- goto end;
- }
-
- size = bytestream2_get_le32(gb);
-
- frame->key_frame = (nb_blocks == 1) &&
- (w == avctx->width) &&
- (h == avctx->height) &&
- (x == 0) && (y == 0);
-
- bytestream2_seek(gb, 2 + nb_blocks * 12 + offset, SEEK_SET);
- csize = bytestream2_get_be32(gb);
- if (bytestream2_get_le32(gb) != MKTAG('I', 'D', 'A', 'T')) {
- ret = AVERROR_INVALIDDATA;
- goto end;
- }
-
- offset += size;
- left = size;
-
- s->y = 0;
- s->row_size = w * 3;
-
- av_fast_padded_malloc(&s->buffer, &s->buffer_size, s->row_size + 16);
- if (!s->buffer) {
- ret = AVERROR(ENOMEM);
- goto end;
- }
-
- av_fast_padded_malloc(&s->last_row, &s->last_row_size, s->row_size);
- if (!s->last_row) {
- ret = AVERROR(ENOMEM);
- goto end;
- }
-
- s->crow_size = w * 3 + 1;
- s->crow_buf = s->buffer + 15;
- s->zstream.avail_out = s->crow_size;
- s->zstream.next_out = s->crow_buf;
- s->image_buf = frame->data[0] + (avctx->height - y - 1) * frame->linesize[0] + x * 3;
- s->image_linesize =-frame->linesize[0];
- s->bpp = 3;
- s->pic_state = 0;
-
- while (left > 16) {
- ret = png_decode_idat(s, csize);
- if (ret < 0)
- goto end;
- left -= csize + 16;
- if (left > 16) {
- bytestream2_skip(gb, 4);
- csize = bytestream2_get_be32(gb);
- if (bytestream2_get_le32(gb) != MKTAG('I', 'D', 'A', 'T')) {
- ret = AVERROR_INVALIDDATA;
- goto end;
- }
- }
- }
-
- inflateEnd(&s->zstream);
- }
-
- frame->pict_type = frame->key_frame ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
-
- av_frame_unref(s->last_picture.f);
- if ((ret = av_frame_ref(s->last_picture.f, frame)) < 0)
- return ret;
-
- *got_frame = 1;
-end:
- inflateEnd(&s->zstream);
-
- if (ret < 0)
- return ret;
- return avpkt->size;
-}
-
-static void decode_flush(AVCodecContext *avctx)
-{
- PNGDecContext *s = avctx->priv_data;
-
- av_frame_unref(s->last_picture.f);
-}
-
-#endif
-
#if HAVE_THREADS
static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
{
avctx->color_range = AVCOL_RANGE_JPEG;
- if (avctx->codec_id == AV_CODEC_ID_LSCR)
- avctx->pix_fmt = AV_PIX_FMT_BGR24;
-
s->avctx = avctx;
s->previous_picture.f = av_frame_alloc();
s->last_picture.f = av_frame_alloc();
FF_CODEC_CAP_ALLOCATE_PROGRESS,
};
#endif
-
-#if CONFIG_LSCR_DECODER
-AVCodec ff_lscr_decoder = {
- .name = "lscr",
- .long_name = NULL_IF_CONFIG_SMALL("LEAD Screen Capture"),
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_LSCR,
- .priv_data_size = sizeof(PNGDecContext),
- .init = png_dec_init,
- .close = png_dec_end,
- .decode = decode_frame_lscr,
- .flush = decode_flush,
- .capabilities = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/,
- .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | FF_CODEC_CAP_INIT_THREADSAFE |
- FF_CODEC_CAP_ALLOCATE_PROGRESS,
-};
-#endif
projects / ffmpeg / blobdiff