#include "libavutil/avassert.h"
#include "libavutil/bprint.h"
+#include "libavutil/crc.h"
#include "libavutil/imgutils.h"
+#include "libavutil/intreadwrite.h"
#include "libavutil/stereo3d.h"
#include "libavutil/mastering_display_metadata.h"
YUV2RGB(rgb8, uint8_t)
YUV2RGB(rgb16, uint16_t)
+static int percent_missing(PNGDecContext *s)
+{
+ if (s->interlace_type) {
+ return 100 - 100 * s->pass / (NB_PASSES - 1);
+ } else {
+ return 100 - 100 * s->y / s->cur_h;
+ }
+}
+
/* process exactly one decompressed row */
static void png_handle_row(PNGDecContext *s)
{
{
int ret;
s->zstream.avail_in = FFMIN(length, bytestream2_get_bytes_left(&s->gb));
- s->zstream.next_in = (unsigned char *)s->gb.buffer;
+ s->zstream.next_in = s->gb.buffer;
bytestream2_skip(&s->gb, length);
/* decode one line if possible */
s->zstream.next_out = s->crow_buf;
}
if (ret == Z_STREAM_END && s->zstream.avail_in > 0) {
- av_log(NULL, AV_LOG_WARNING,
+ av_log(s->avctx, AV_LOG_WARNING,
"%d undecompressed bytes left in buffer\n", s->zstream.avail_in);
return 0;
}
zstream.opaque = NULL;
if (inflateInit(&zstream) != Z_OK)
return AVERROR_EXTERNAL;
- zstream.next_in = (unsigned char *)data;
+ zstream.next_in = data;
zstream.avail_in = data_end - data;
av_bprint_init(bp, 0, AV_BPRINT_SIZE_UNLIMITED);
s->bpp += byte_depth;
}
- if ((ret = ff_thread_get_buffer(avctx, &s->picture, AV_GET_BUFFER_FLAG_REF)) < 0)
- return ret;
if (avctx->codec_id == AV_CODEC_ID_APNG && s->last_dispose_op != APNG_DISPOSE_OP_PREVIOUS) {
ff_thread_release_buffer(avctx, &s->previous_picture);
if ((ret = ff_thread_get_buffer(avctx, &s->previous_picture, AV_GET_BUFFER_FLAG_REF)) < 0)
return ret;
}
+ if ((ret = ff_thread_get_buffer(avctx, &s->picture, AV_GET_BUFFER_FLAG_REF)) < 0)
+ return ret;
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
p->interlaced_frame = !!s->interlace_type;
return AVERROR_INVALIDDATA;
}
+ if (s->pic_state & PNG_IDAT) {
+ av_log(avctx, AV_LOG_ERROR, "fctl after IDAT\n");
+ return AVERROR_INVALIDDATA;
+ }
+
s->last_w = s->cur_w;
s->last_h = s->cur_h;
s->last_x_offset = s->x_offset;
static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s,
AVFrame *p, AVPacket *avpkt)
{
+ const AVCRC *crc_tab = av_crc_get_table(AV_CRC_32_IEEE_LE);
AVDictionary **metadatap = NULL;
uint32_t tag, length;
int decode_next_dat = 0;
ret = AVERROR_INVALIDDATA;
goto fail;
}
+ if (avctx->err_recognition & (AV_EF_CRCCHECK | AV_EF_IGNORE_ERR)) {
+ uint32_t crc_sig = AV_RB32(s->gb.buffer + length + 4);
+ uint32_t crc_cal = ~av_crc(crc_tab, UINT32_MAX, s->gb.buffer, length + 4);
+ if (crc_sig ^ crc_cal) {
+ av_log(avctx, AV_LOG_ERROR, "CRC mismatch in chunk");
+ if (avctx->err_recognition & AV_EF_EXPLODE) {
+ av_log(avctx, AV_LOG_ERROR, ", quitting\n");
+ ret = AVERROR_INVALIDDATA;
+ goto fail;
+ }
+ av_log(avctx, AV_LOG_ERROR, ", skipping\n");
+ bytestream2_skip(&s->gb, 4); /* tag */
+ goto skip_tag;
+ }
+ }
tag = bytestream2_get_le32(&s->gb);
if (avctx->debug & FF_DEBUG_STARTCODE)
av_log(avctx, AV_LOG_DEBUG, "png: tag=%s length=%u\n",
case MKTAG('f', 'd', 'A', 'T'):
if (!CONFIG_APNG_DECODER || avctx->codec_id != AV_CODEC_ID_APNG)
goto skip_tag;
- if (!decode_next_dat) {
+ if (!decode_next_dat || length < 4) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
case MKTAG('s', 'T', 'E', 'R'): {
int mode = bytestream2_get_byte(&s->gb);
AVStereo3D *stereo3d = av_stereo3d_create_side_data(p);
- if (!stereo3d)
+ if (!stereo3d) {
+ ret = AVERROR(ENOMEM);
goto fail;
+ }
if (mode == 0 || mode == 1) {
stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
break;
}
case MKTAG('i', 'C', 'C', 'P'): {
- if (decode_iccp_chunk(s, length, p) < 0)
+ if ((ret = decode_iccp_chunk(s, length, p)) < 0)
goto fail;
break;
}
return 0;
}
+ if (percent_missing(s) > avctx->discard_damaged_percentage)
+ return AVERROR_INVALIDDATA;
+
if (s->bits_per_pixel <= 4)
handle_small_bpp(s, p);
for (y = 0; y < s->height; ++y) {
uint8_t *row = &s->image_buf[s->image_linesize * y];
- /* since we're updating in-place, we have to go from right to left */
- for (x = s->width; x > 0; --x) {
- uint8_t *pixel = &row[s->bpp * (x - 1)];
- memmove(pixel, &row[raw_bpp * (x - 1)], raw_bpp);
+ if (s->bpp == 2 && byte_depth == 1) {
+ uint8_t *pixel = &row[2 * s->width - 1];
+ uint8_t *rowp = &row[1 * s->width - 1];
+ int tcolor = s->transparent_color_be[0];
+ for (x = s->width; x > 0; --x) {
+ *pixel-- = *rowp == tcolor ? 0 : 0xff;
+ *pixel-- = *rowp--;
+ }
+ } else if (s->bpp == 4 && byte_depth == 1) {
+ uint8_t *pixel = &row[4 * s->width - 1];
+ uint8_t *rowp = &row[3 * s->width - 1];
+ int tcolor = AV_RL24(s->transparent_color_be);
+ for (x = s->width; x > 0; --x) {
+ *pixel-- = AV_RL24(rowp-2) == tcolor ? 0 : 0xff;
+ *pixel-- = *rowp--;
+ *pixel-- = *rowp--;
+ *pixel-- = *rowp--;
+ }
+ } else {
+ /* since we're updating in-place, we have to go from right to left */
+ for (x = s->width; x > 0; --x) {
+ uint8_t *pixel = &row[s->bpp * (x - 1)];
+ memmove(pixel, &row[raw_bpp * (x - 1)], raw_bpp);
- if (!memcmp(pixel, s->transparent_color_be, raw_bpp)) {
- memset(&pixel[raw_bpp], 0, byte_depth);
- } else {
- memset(&pixel[raw_bpp], 0xff, byte_depth);
+ if (!memcmp(pixel, s->transparent_color_be, raw_bpp)) {
+ memset(&pixel[raw_bpp], 0, byte_depth);
+ } else {
+ memset(&pixel[raw_bpp], 0xff, byte_depth);
+ }
}
}
}
if (CONFIG_PNG_DECODER && avctx->codec_id != AV_CODEC_ID_APNG)
handle_p_frame_png(s, p);
else if (CONFIG_APNG_DECODER &&
+ s->previous_picture.f->width == p->width &&
+ s->previous_picture.f->height== p->height &&
+ s->previous_picture.f->format== p->format &&
avctx->codec_id == AV_CODEC_ID_APNG &&
(ret = handle_p_frame_apng(avctx, s, p)) < 0)
goto fail;
}
#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();
return AVERROR(ENOMEM);
}
- if (!avctx->internal->is_copy) {
- avctx->internal->allocate_progress = 1;
- ff_pngdsp_init(&s->dsp);
- }
+ ff_pngdsp_init(&s->dsp);
return 0;
}
.init = png_dec_init,
.close = png_dec_end,
.decode = decode_frame_apng,
- .init_thread_copy = ONLY_IF_THREADS_ENABLED(png_dec_init),
.update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/,
- .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
+ .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
+ FF_CODEC_CAP_ALLOCATE_PROGRESS,
};
#endif
.init = png_dec_init,
.close = png_dec_end,
.decode = decode_frame_png,
- .init_thread_copy = ONLY_IF_THREADS_ENABLED(png_dec_init),
.update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/,
- .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | FF_CODEC_CAP_INIT_THREADSAFE,
+ .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | FF_CODEC_CAP_INIT_THREADSAFE |
+ 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