| /* |
| * PNG image format |
| * Copyright (c) 2003 Fabrice Bellard |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| //#define DEBUG |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/bprint.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/stereo3d.h" |
| #include "libavutil/mastering_display_metadata.h" |
| |
| #include "avcodec.h" |
| #include "bytestream.h" |
| #include "internal.h" |
| #include "apng.h" |
| #include "png.h" |
| #include "pngdsp.h" |
| #include "thread.h" |
| |
| #include <zlib.h> |
| |
| enum PNGHeaderState { |
| PNG_IHDR = 1 << 0, |
| PNG_PLTE = 1 << 1, |
| }; |
| |
| enum PNGImageState { |
| PNG_IDAT = 1 << 0, |
| PNG_ALLIMAGE = 1 << 1, |
| }; |
| |
| typedef struct PNGDecContext { |
| PNGDSPContext dsp; |
| AVCodecContext *avctx; |
| |
| GetByteContext gb; |
| ThreadFrame previous_picture; |
| ThreadFrame last_picture; |
| ThreadFrame picture; |
| |
| enum PNGHeaderState hdr_state; |
| enum PNGImageState pic_state; |
| int width, height; |
| int cur_w, cur_h; |
| int last_w, last_h; |
| int x_offset, y_offset; |
| int last_x_offset, last_y_offset; |
| uint8_t dispose_op, blend_op; |
| uint8_t last_dispose_op; |
| int bit_depth; |
| int color_type; |
| int compression_type; |
| int interlace_type; |
| int filter_type; |
| int channels; |
| int bits_per_pixel; |
| int bpp; |
| int has_trns; |
| uint8_t transparent_color_be[6]; |
| |
| uint8_t *image_buf; |
| int image_linesize; |
| uint32_t palette[256]; |
| uint8_t *crow_buf; |
| uint8_t *last_row; |
| unsigned int last_row_size; |
| uint8_t *tmp_row; |
| unsigned int tmp_row_size; |
| uint8_t *buffer; |
| int buffer_size; |
| int pass; |
| int crow_size; /* compressed row size (include filter type) */ |
| int row_size; /* decompressed row size */ |
| int pass_row_size; /* decompress row size of the current pass */ |
| int y; |
| z_stream zstream; |
| } PNGDecContext; |
| |
| /* Mask to determine which pixels are valid in a pass */ |
| static const uint8_t png_pass_mask[NB_PASSES] = { |
| 0x01, 0x01, 0x11, 0x11, 0x55, 0x55, 0xff, |
| }; |
| |
| /* Mask to determine which y pixels can be written in a pass */ |
| static const uint8_t png_pass_dsp_ymask[NB_PASSES] = { |
| 0xff, 0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, |
| }; |
| |
| /* Mask to determine which pixels to overwrite while displaying */ |
| static const uint8_t png_pass_dsp_mask[NB_PASSES] = { |
| 0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff |
| }; |
| |
| /* NOTE: we try to construct a good looking image at each pass. width |
| * is the original image width. We also do pixel format conversion at |
| * this stage */ |
| static void png_put_interlaced_row(uint8_t *dst, int width, |
| int bits_per_pixel, int pass, |
| int color_type, const uint8_t *src) |
| { |
| int x, mask, dsp_mask, j, src_x, b, bpp; |
| uint8_t *d; |
| const uint8_t *s; |
| |
| mask = png_pass_mask[pass]; |
| dsp_mask = png_pass_dsp_mask[pass]; |
| |
| switch (bits_per_pixel) { |
| case 1: |
| src_x = 0; |
| for (x = 0; x < width; x++) { |
| j = (x & 7); |
| if ((dsp_mask << j) & 0x80) { |
| b = (src[src_x >> 3] >> (7 - (src_x & 7))) & 1; |
| dst[x >> 3] &= 0xFF7F>>j; |
| dst[x >> 3] |= b << (7 - j); |
| } |
| if ((mask << j) & 0x80) |
| src_x++; |
| } |
| break; |
| case 2: |
| src_x = 0; |
| for (x = 0; x < width; x++) { |
| int j2 = 2 * (x & 3); |
| j = (x & 7); |
| if ((dsp_mask << j) & 0x80) { |
| b = (src[src_x >> 2] >> (6 - 2*(src_x & 3))) & 3; |
| dst[x >> 2] &= 0xFF3F>>j2; |
| dst[x >> 2] |= b << (6 - j2); |
| } |
| if ((mask << j) & 0x80) |
| src_x++; |
| } |
| break; |
| case 4: |
| src_x = 0; |
| for (x = 0; x < width; x++) { |
| int j2 = 4*(x&1); |
| j = (x & 7); |
| if ((dsp_mask << j) & 0x80) { |
| b = (src[src_x >> 1] >> (4 - 4*(src_x & 1))) & 15; |
| dst[x >> 1] &= 0xFF0F>>j2; |
| dst[x >> 1] |= b << (4 - j2); |
| } |
| if ((mask << j) & 0x80) |
| src_x++; |
| } |
| break; |
| default: |
| bpp = bits_per_pixel >> 3; |
| d = dst; |
| s = src; |
| for (x = 0; x < width; x++) { |
| j = x & 7; |
| if ((dsp_mask << j) & 0x80) { |
| memcpy(d, s, bpp); |
| } |
| d += bpp; |
| if ((mask << j) & 0x80) |
| s += bpp; |
| } |
| break; |
| } |
| } |
| |
| void ff_add_png_paeth_prediction(uint8_t *dst, uint8_t *src, uint8_t *top, |
| int w, int bpp) |
| { |
| int i; |
| for (i = 0; i < w; i++) { |
| int a, b, c, p, pa, pb, pc; |
| |
| a = dst[i - bpp]; |
| b = top[i]; |
| c = top[i - bpp]; |
| |
| p = b - c; |
| pc = a - c; |
| |
| pa = abs(p); |
| pb = abs(pc); |
| pc = abs(p + pc); |
| |
| if (pa <= pb && pa <= pc) |
| p = a; |
| else if (pb <= pc) |
| p = b; |
| else |
| p = c; |
| dst[i] = p + src[i]; |
| } |
| } |
| |
| #define UNROLL1(bpp, op) \ |
| { \ |
| r = dst[0]; \ |
| if (bpp >= 2) \ |
| g = dst[1]; \ |
| if (bpp >= 3) \ |
| b = dst[2]; \ |
| if (bpp >= 4) \ |
| a = dst[3]; \ |
| for (; i <= size - bpp; i += bpp) { \ |
| dst[i + 0] = r = op(r, src[i + 0], last[i + 0]); \ |
| if (bpp == 1) \ |
| continue; \ |
| dst[i + 1] = g = op(g, src[i + 1], last[i + 1]); \ |
| if (bpp == 2) \ |
| continue; \ |
| dst[i + 2] = b = op(b, src[i + 2], last[i + 2]); \ |
| if (bpp == 3) \ |
| continue; \ |
| dst[i + 3] = a = op(a, src[i + 3], last[i + 3]); \ |
| } \ |
| } |
| |
| #define UNROLL_FILTER(op) \ |
| if (bpp == 1) { \ |
| UNROLL1(1, op) \ |
| } else if (bpp == 2) { \ |
| UNROLL1(2, op) \ |
| } else if (bpp == 3) { \ |
| UNROLL1(3, op) \ |
| } else if (bpp == 4) { \ |
| UNROLL1(4, op) \ |
| } \ |
| for (; i < size; i++) { \ |
| dst[i] = op(dst[i - bpp], src[i], last[i]); \ |
| } |
| |
| /* 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) |
| { |
| int i, p, r, g, b, a; |
| |
| switch (filter_type) { |
| case PNG_FILTER_VALUE_NONE: |
| memcpy(dst, src, size); |
| break; |
| case PNG_FILTER_VALUE_SUB: |
| for (i = 0; i < bpp; i++) |
| dst[i] = src[i]; |
| if (bpp == 4) { |
| p = *(int *)dst; |
| for (; i < size; i += bpp) { |
| unsigned s = *(int *)(src + i); |
| p = ((s & 0x7f7f7f7f) + (p & 0x7f7f7f7f)) ^ ((s ^ p) & 0x80808080); |
| *(int *)(dst + i) = p; |
| } |
| } else { |
| #define OP_SUB(x, s, l) ((x) + (s)) |
| UNROLL_FILTER(OP_SUB); |
| } |
| break; |
| case PNG_FILTER_VALUE_UP: |
| dsp->add_bytes_l2(dst, src, last, size); |
| break; |
| case PNG_FILTER_VALUE_AVG: |
| for (i = 0; i < bpp; i++) { |
| p = (last[i] >> 1); |
| dst[i] = p + src[i]; |
| } |
| #define OP_AVG(x, s, l) (((((x) + (l)) >> 1) + (s)) & 0xff) |
| UNROLL_FILTER(OP_AVG); |
| break; |
| case PNG_FILTER_VALUE_PAETH: |
| for (i = 0; i < bpp; i++) { |
| p = last[i]; |
| dst[i] = p + src[i]; |
| } |
| if (bpp > 2 && size > 4) { |
| /* would write off the end of the array if we let it process |
| * the last pixel with bpp=3 */ |
| int w = (bpp & 3) ? size - 3 : size; |
| |
| if (w > i) { |
| dsp->add_paeth_prediction(dst + i, src + i, last + i, size - i, bpp); |
| i = w; |
| } |
| } |
| ff_add_png_paeth_prediction(dst + i, src + i, last + i, size - i, bpp); |
| break; |
| } |
| } |
| |
| /* This used to be called "deloco" in FFmpeg |
| * and is actually an inverse reversible colorspace transformation */ |
| #define YUV2RGB(NAME, TYPE) \ |
| static void deloco_ ## NAME(TYPE *dst, int size, int alpha) \ |
| { \ |
| int i; \ |
| for (i = 0; i < size; i += 3 + alpha) { \ |
| int g = dst [i + 1]; \ |
| dst[i + 0] += g; \ |
| dst[i + 2] += g; \ |
| } \ |
| } |
| |
| YUV2RGB(rgb8, uint8_t) |
| YUV2RGB(rgb16, uint16_t) |
| |
| /* process exactly one decompressed row */ |
| static void png_handle_row(PNGDecContext *s) |
| { |
| uint8_t *ptr, *last_row; |
| int got_line; |
| |
| if (!s->interlace_type) { |
| ptr = s->image_buf + s->image_linesize * (s->y + s->y_offset) + s->x_offset * s->bpp; |
| if (s->y == 0) |
| last_row = s->last_row; |
| 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); |
| /* 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) { |
| deloco_rgb16((uint16_t *)(ptr - s->image_linesize), s->row_size / 2, |
| s->color_type == PNG_COLOR_TYPE_RGB_ALPHA); |
| } else { |
| deloco_rgb8(ptr - s->image_linesize, s->row_size, |
| s->color_type == PNG_COLOR_TYPE_RGB_ALPHA); |
| } |
| } |
| s->y++; |
| if (s->y == s->cur_h) { |
| s->pic_state |= PNG_ALLIMAGE; |
| if (s->filter_type == PNG_FILTER_TYPE_LOCO) { |
| if (s->bit_depth == 16) { |
| deloco_rgb16((uint16_t *)ptr, s->row_size / 2, |
| s->color_type == PNG_COLOR_TYPE_RGB_ALPHA); |
| } else { |
| deloco_rgb8(ptr, s->row_size, |
| s->color_type == PNG_COLOR_TYPE_RGB_ALPHA); |
| } |
| } |
| } |
| } else { |
| got_line = 0; |
| for (;;) { |
| ptr = s->image_buf + s->image_linesize * (s->y + s->y_offset) + s->x_offset * s->bpp; |
| if ((ff_png_pass_ymask[s->pass] << (s->y & 7)) & 0x80) { |
| /* if we already read one row, it is time to stop to |
| * 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); |
| FFSWAP(uint8_t *, s->last_row, s->tmp_row); |
| FFSWAP(unsigned int, s->last_row_size, s->tmp_row_size); |
| got_line = 1; |
| } |
| if ((png_pass_dsp_ymask[s->pass] << (s->y & 7)) & 0x80) { |
| png_put_interlaced_row(ptr, s->cur_w, s->bits_per_pixel, s->pass, |
| s->color_type, s->last_row); |
| } |
| s->y++; |
| if (s->y == s->cur_h) { |
| memset(s->last_row, 0, s->row_size); |
| for (;;) { |
| if (s->pass == NB_PASSES - 1) { |
| s->pic_state |= PNG_ALLIMAGE; |
| goto the_end; |
| } else { |
| s->pass++; |
| s->y = 0; |
| s->pass_row_size = ff_png_pass_row_size(s->pass, |
| s->bits_per_pixel, |
| s->cur_w); |
| s->crow_size = s->pass_row_size + 1; |
| if (s->pass_row_size != 0) |
| break; |
| /* skip pass if empty row */ |
| } |
| } |
| } |
| } |
| the_end:; |
| } |
| } |
| |
| static int png_decode_idat(PNGDecContext *s, int length) |
| { |
| int ret; |
| s->zstream.avail_in = FFMIN(length, bytestream2_get_bytes_left(&s->gb)); |
| s->zstream.next_in = (unsigned char *)s->gb.buffer; |
| bytestream2_skip(&s->gb, length); |
| |
| /* decode one line if possible */ |
| while (s->zstream.avail_in > 0) { |
| ret = inflate(&s->zstream, Z_PARTIAL_FLUSH); |
| if (ret != Z_OK && ret != Z_STREAM_END) { |
| av_log(s->avctx, AV_LOG_ERROR, "inflate returned error %d\n", ret); |
| return AVERROR_EXTERNAL; |
| } |
| if (s->zstream.avail_out == 0) { |
| if (!(s->pic_state & PNG_ALLIMAGE)) { |
| png_handle_row(s); |
| } |
| s->zstream.avail_out = s->crow_size; |
| s->zstream.next_out = s->crow_buf; |
| } |
| if (ret == Z_STREAM_END && s->zstream.avail_in > 0) { |
| av_log(NULL, AV_LOG_WARNING, |
| "%d undecompressed bytes left in buffer\n", s->zstream.avail_in); |
| return 0; |
| } |
| } |
| return 0; |
| } |
| |
| static int decode_zbuf(AVBPrint *bp, const uint8_t *data, |
| const uint8_t *data_end) |
| { |
| z_stream zstream; |
| unsigned char *buf; |
| unsigned buf_size; |
| int ret; |
| |
| zstream.zalloc = ff_png_zalloc; |
| zstream.zfree = ff_png_zfree; |
| zstream.opaque = NULL; |
| if (inflateInit(&zstream) != Z_OK) |
| return AVERROR_EXTERNAL; |
| zstream.next_in = (unsigned char *)data; |
| zstream.avail_in = data_end - data; |
| av_bprint_init(bp, 0, AV_BPRINT_SIZE_UNLIMITED); |
| |
| while (zstream.avail_in > 0) { |
| av_bprint_get_buffer(bp, 2, &buf, &buf_size); |
| if (buf_size < 2) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| zstream.next_out = buf; |
| zstream.avail_out = buf_size - 1; |
| ret = inflate(&zstream, Z_PARTIAL_FLUSH); |
| if (ret != Z_OK && ret != Z_STREAM_END) { |
| ret = AVERROR_EXTERNAL; |
| goto fail; |
| } |
| bp->len += zstream.next_out - buf; |
| if (ret == Z_STREAM_END) |
| break; |
| } |
| inflateEnd(&zstream); |
| bp->str[bp->len] = 0; |
| return 0; |
| |
| fail: |
| inflateEnd(&zstream); |
| av_bprint_finalize(bp, NULL); |
| return ret; |
| } |
| |
| static uint8_t *iso88591_to_utf8(const uint8_t *in, size_t size_in) |
| { |
| size_t extra = 0, i; |
| uint8_t *out, *q; |
| |
| for (i = 0; i < size_in; i++) |
| extra += in[i] >= 0x80; |
| if (size_in == SIZE_MAX || extra > SIZE_MAX - size_in - 1) |
| return NULL; |
| q = out = av_malloc(size_in + extra + 1); |
| if (!out) |
| return NULL; |
| for (i = 0; i < size_in; i++) { |
| if (in[i] >= 0x80) { |
| *(q++) = 0xC0 | (in[i] >> 6); |
| *(q++) = 0x80 | (in[i] & 0x3F); |
| } else { |
| *(q++) = in[i]; |
| } |
| } |
| *(q++) = 0; |
| return out; |
| } |
| |
| static int decode_text_chunk(PNGDecContext *s, uint32_t length, int compressed, |
| AVDictionary **dict) |
| { |
| int ret, method; |
| const uint8_t *data = s->gb.buffer; |
| const uint8_t *data_end = data + length; |
| const uint8_t *keyword = data; |
| const uint8_t *keyword_end = memchr(keyword, 0, data_end - keyword); |
| uint8_t *kw_utf8 = NULL, *text, *txt_utf8 = NULL; |
| unsigned text_len; |
| AVBPrint bp; |
| |
| if (!keyword_end) |
| return AVERROR_INVALIDDATA; |
| data = keyword_end + 1; |
| |
| if (compressed) { |
| if (data == data_end) |
| return AVERROR_INVALIDDATA; |
| method = *(data++); |
| if (method) |
| return AVERROR_INVALIDDATA; |
| if ((ret = decode_zbuf(&bp, data, data_end)) < 0) |
| return ret; |
| text_len = bp.len; |
| ret = av_bprint_finalize(&bp, (char **)&text); |
| if (ret < 0) |
| return ret; |
| } else { |
| text = (uint8_t *)data; |
| text_len = data_end - text; |
| } |
| |
| kw_utf8 = iso88591_to_utf8(keyword, keyword_end - keyword); |
| txt_utf8 = iso88591_to_utf8(text, text_len); |
| if (text != data) |
| av_free(text); |
| if (!(kw_utf8 && txt_utf8)) { |
| av_free(kw_utf8); |
| av_free(txt_utf8); |
| return AVERROR(ENOMEM); |
| } |
| |
| av_dict_set(dict, kw_utf8, txt_utf8, |
| AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL); |
| return 0; |
| } |
| |
| static int decode_ihdr_chunk(AVCodecContext *avctx, PNGDecContext *s, |
| uint32_t length) |
| { |
| if (length != 13) |
| return AVERROR_INVALIDDATA; |
| |
| if (s->pic_state & PNG_IDAT) { |
| av_log(avctx, AV_LOG_ERROR, "IHDR after IDAT\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (s->hdr_state & PNG_IHDR) { |
| av_log(avctx, AV_LOG_ERROR, "Multiple IHDR\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| s->width = s->cur_w = bytestream2_get_be32(&s->gb); |
| s->height = s->cur_h = bytestream2_get_be32(&s->gb); |
| if (av_image_check_size(s->width, s->height, 0, avctx)) { |
| s->cur_w = s->cur_h = s->width = s->height = 0; |
| av_log(avctx, AV_LOG_ERROR, "Invalid image size\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| s->bit_depth = bytestream2_get_byte(&s->gb); |
| if (s->bit_depth != 1 && s->bit_depth != 2 && s->bit_depth != 4 && |
| s->bit_depth != 8 && s->bit_depth != 16) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid bit depth\n"); |
| goto error; |
| } |
| s->color_type = bytestream2_get_byte(&s->gb); |
| s->compression_type = bytestream2_get_byte(&s->gb); |
| if (s->compression_type) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid compression method %d\n", s->compression_type); |
| goto error; |
| } |
| s->filter_type = bytestream2_get_byte(&s->gb); |
| s->interlace_type = bytestream2_get_byte(&s->gb); |
| bytestream2_skip(&s->gb, 4); /* crc */ |
| s->hdr_state |= PNG_IHDR; |
| if (avctx->debug & FF_DEBUG_PICT_INFO) |
| av_log(avctx, AV_LOG_DEBUG, "width=%d height=%d depth=%d color_type=%d " |
| "compression_type=%d filter_type=%d interlace_type=%d\n", |
| s->width, s->height, s->bit_depth, s->color_type, |
| s->compression_type, s->filter_type, s->interlace_type); |
| |
| return 0; |
| error: |
| s->cur_w = s->cur_h = s->width = s->height = 0; |
| s->bit_depth = 8; |
| return AVERROR_INVALIDDATA; |
| } |
| |
| static int decode_phys_chunk(AVCodecContext *avctx, PNGDecContext *s) |
| { |
| if (s->pic_state & PNG_IDAT) { |
| av_log(avctx, AV_LOG_ERROR, "pHYs after IDAT\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| avctx->sample_aspect_ratio.num = bytestream2_get_be32(&s->gb); |
| avctx->sample_aspect_ratio.den = bytestream2_get_be32(&s->gb); |
| if (avctx->sample_aspect_ratio.num < 0 || avctx->sample_aspect_ratio.den < 0) |
| avctx->sample_aspect_ratio = (AVRational){ 0, 1 }; |
| bytestream2_skip(&s->gb, 1); /* unit specifier */ |
| bytestream2_skip(&s->gb, 4); /* crc */ |
| |
| return 0; |
| } |
| |
| static int decode_idat_chunk(AVCodecContext *avctx, PNGDecContext *s, |
| uint32_t length, AVFrame *p) |
| { |
| int ret; |
| size_t byte_depth = s->bit_depth > 8 ? 2 : 1; |
| |
| if (!(s->hdr_state & PNG_IHDR)) { |
| av_log(avctx, AV_LOG_ERROR, "IDAT without IHDR\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| if (!(s->pic_state & PNG_IDAT)) { |
| /* init image info */ |
| ret = ff_set_dimensions(avctx, s->width, s->height); |
| if (ret < 0) |
| return ret; |
| |
| s->channels = ff_png_get_nb_channels(s->color_type); |
| s->bits_per_pixel = s->bit_depth * s->channels; |
| s->bpp = (s->bits_per_pixel + 7) >> 3; |
| s->row_size = (s->cur_w * s->bits_per_pixel + 7) >> 3; |
| |
| if ((s->bit_depth == 2 || s->bit_depth == 4 || s->bit_depth == 8) && |
| s->color_type == PNG_COLOR_TYPE_RGB) { |
| avctx->pix_fmt = AV_PIX_FMT_RGB24; |
| } else if ((s->bit_depth == 2 || s->bit_depth == 4 || s->bit_depth == 8) && |
| s->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { |
| avctx->pix_fmt = AV_PIX_FMT_RGBA; |
| } else if ((s->bit_depth == 2 || s->bit_depth == 4 || s->bit_depth == 8) && |
| s->color_type == PNG_COLOR_TYPE_GRAY) { |
| avctx->pix_fmt = AV_PIX_FMT_GRAY8; |
| } else if (s->bit_depth == 16 && |
| s->color_type == PNG_COLOR_TYPE_GRAY) { |
| avctx->pix_fmt = AV_PIX_FMT_GRAY16BE; |
| } else if (s->bit_depth == 16 && |
| s->color_type == PNG_COLOR_TYPE_RGB) { |
| avctx->pix_fmt = AV_PIX_FMT_RGB48BE; |
| } else if (s->bit_depth == 16 && |
| s->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { |
| avctx->pix_fmt = AV_PIX_FMT_RGBA64BE; |
| } else if ((s->bits_per_pixel == 1 || s->bits_per_pixel == 2 || s->bits_per_pixel == 4 || s->bits_per_pixel == 8) && |
| s->color_type == PNG_COLOR_TYPE_PALETTE) { |
| avctx->pix_fmt = AV_PIX_FMT_PAL8; |
| } else if (s->bit_depth == 1 && s->bits_per_pixel == 1 && avctx->codec_id != AV_CODEC_ID_APNG) { |
| avctx->pix_fmt = AV_PIX_FMT_MONOBLACK; |
| } else if (s->bit_depth == 8 && |
| s->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { |
| avctx->pix_fmt = AV_PIX_FMT_YA8; |
| } else if (s->bit_depth == 16 && |
| s->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { |
| avctx->pix_fmt = AV_PIX_FMT_YA16BE; |
| } else { |
| avpriv_report_missing_feature(avctx, |
| "Bit depth %d color type %d", |
| s->bit_depth, s->color_type); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| if (s->has_trns && s->color_type != PNG_COLOR_TYPE_PALETTE) { |
| switch (avctx->pix_fmt) { |
| case AV_PIX_FMT_RGB24: |
| avctx->pix_fmt = AV_PIX_FMT_RGBA; |
| break; |
| |
| case AV_PIX_FMT_RGB48BE: |
| avctx->pix_fmt = AV_PIX_FMT_RGBA64BE; |
| break; |
| |
| case AV_PIX_FMT_GRAY8: |
| avctx->pix_fmt = AV_PIX_FMT_YA8; |
| break; |
| |
| case AV_PIX_FMT_GRAY16BE: |
| avctx->pix_fmt = AV_PIX_FMT_YA16BE; |
| break; |
| |
| default: |
| avpriv_request_sample(avctx, "bit depth %d " |
| "and color type %d with TRNS", |
| s->bit_depth, s->color_type); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| 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; |
| } |
| p->pict_type = AV_PICTURE_TYPE_I; |
| p->key_frame = 1; |
| p->interlaced_frame = !!s->interlace_type; |
| |
| ff_thread_finish_setup(avctx); |
| |
| /* compute the compressed row size */ |
| if (!s->interlace_type) { |
| s->crow_size = s->row_size + 1; |
| } else { |
| s->pass = 0; |
| s->pass_row_size = ff_png_pass_row_size(s->pass, |
| s->bits_per_pixel, |
| s->cur_w); |
| s->crow_size = s->pass_row_size + 1; |
| } |
| ff_dlog(avctx, "row_size=%d crow_size =%d\n", |
| s->row_size, s->crow_size); |
| s->image_buf = p->data[0]; |
| s->image_linesize = p->linesize[0]; |
| /* copy the palette if needed */ |
| 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 */ |
| av_fast_padded_mallocz(&s->last_row, &s->last_row_size, s->row_size); |
| if (!s->last_row) |
| return AVERROR_INVALIDDATA; |
| if (s->interlace_type || |
| s->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { |
| av_fast_padded_malloc(&s->tmp_row, &s->tmp_row_size, s->row_size); |
| if (!s->tmp_row) |
| return AVERROR_INVALIDDATA; |
| } |
| /* compressed row */ |
| av_fast_padded_malloc(&s->buffer, &s->buffer_size, s->row_size + 16); |
| if (!s->buffer) |
| return AVERROR(ENOMEM); |
| |
| /* we want crow_buf+1 to be 16-byte aligned */ |
| s->crow_buf = s->buffer + 15; |
| s->zstream.avail_out = s->crow_size; |
| s->zstream.next_out = s->crow_buf; |
| } |
| |
| s->pic_state |= PNG_IDAT; |
| |
| /* set image to non-transparent bpp while decompressing */ |
| if (s->has_trns && s->color_type != PNG_COLOR_TYPE_PALETTE) |
| s->bpp -= byte_depth; |
| |
| ret = png_decode_idat(s, length); |
| |
| if (s->has_trns && s->color_type != PNG_COLOR_TYPE_PALETTE) |
| s->bpp += byte_depth; |
| |
| if (ret < 0) |
| return ret; |
| |
| bytestream2_skip(&s->gb, 4); /* crc */ |
| |
| return 0; |
| } |
| |
| static int decode_plte_chunk(AVCodecContext *avctx, PNGDecContext *s, |
| uint32_t length) |
| { |
| int n, i, r, g, b; |
| |
| if ((length % 3) != 0 || length > 256 * 3) |
| return AVERROR_INVALIDDATA; |
| /* read the palette */ |
| n = length / 3; |
| for (i = 0; i < n; i++) { |
| r = bytestream2_get_byte(&s->gb); |
| g = bytestream2_get_byte(&s->gb); |
| b = bytestream2_get_byte(&s->gb); |
| s->palette[i] = (0xFFU << 24) | (r << 16) | (g << 8) | b; |
| } |
| for (; i < 256; i++) |
| s->palette[i] = (0xFFU << 24); |
| s->hdr_state |= PNG_PLTE; |
| bytestream2_skip(&s->gb, 4); /* crc */ |
| |
| return 0; |
| } |
| |
| static int decode_trns_chunk(AVCodecContext *avctx, PNGDecContext *s, |
| uint32_t length) |
| { |
| int v, i; |
| |
| if (!(s->hdr_state & PNG_IHDR)) { |
| av_log(avctx, AV_LOG_ERROR, "trns before IHDR\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (s->pic_state & PNG_IDAT) { |
| av_log(avctx, AV_LOG_ERROR, "trns after IDAT\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (s->color_type == PNG_COLOR_TYPE_PALETTE) { |
| if (length > 256 || !(s->hdr_state & PNG_PLTE)) |
| return AVERROR_INVALIDDATA; |
| |
| for (i = 0; i < length; i++) { |
| unsigned v = bytestream2_get_byte(&s->gb); |
| s->palette[i] = (s->palette[i] & 0x00ffffff) | (v << 24); |
| } |
| } else if (s->color_type == PNG_COLOR_TYPE_GRAY || s->color_type == PNG_COLOR_TYPE_RGB) { |
| if ((s->color_type == PNG_COLOR_TYPE_GRAY && length != 2) || |
| (s->color_type == PNG_COLOR_TYPE_RGB && length != 6) || |
| s->bit_depth == 1) |
| return AVERROR_INVALIDDATA; |
| |
| for (i = 0; i < length / 2; i++) { |
| /* only use the least significant bits */ |
| v = av_mod_uintp2(bytestream2_get_be16(&s->gb), s->bit_depth); |
| |
| if (s->bit_depth > 8) |
| AV_WB16(&s->transparent_color_be[2 * i], v); |
| else |
| s->transparent_color_be[i] = v; |
| } |
| } else { |
| return AVERROR_INVALIDDATA; |
| } |
| |
| bytestream2_skip(&s->gb, 4); /* crc */ |
| s->has_trns = 1; |
| |
| return 0; |
| } |
| |
| static int decode_iccp_chunk(PNGDecContext *s, int length, AVFrame *f) |
| { |
| int ret, cnt = 0; |
| uint8_t *data, profile_name[82]; |
| AVBPrint bp; |
| AVFrameSideData *sd; |
| |
| while ((profile_name[cnt++] = bytestream2_get_byte(&s->gb)) && cnt < 81); |
| if (cnt > 80) { |
| av_log(s->avctx, AV_LOG_ERROR, "iCCP with invalid name!\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| length = FFMAX(length - cnt, 0); |
| |
| if (bytestream2_get_byte(&s->gb) != 0) { |
| av_log(s->avctx, AV_LOG_ERROR, "iCCP with invalid compression!\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| length = FFMAX(length - 1, 0); |
| |
| if ((ret = decode_zbuf(&bp, s->gb.buffer, s->gb.buffer + length)) < 0) |
| return ret; |
| |
| ret = av_bprint_finalize(&bp, (char **)&data); |
| if (ret < 0) |
| return ret; |
| |
| sd = av_frame_new_side_data(f, AV_FRAME_DATA_ICC_PROFILE, bp.len); |
| if (!sd) { |
| av_free(data); |
| return AVERROR(ENOMEM); |
| } |
| |
| av_dict_set(&sd->metadata, "name", profile_name, 0); |
| memcpy(sd->data, data, bp.len); |
| av_free(data); |
| |
| /* ICC compressed data and CRC */ |
| bytestream2_skip(&s->gb, length + 4); |
| |
| return 0; |
| } |
| |
| static void handle_small_bpp(PNGDecContext *s, AVFrame *p) |
| { |
| if (s->bits_per_pixel == 1 && s->color_type == PNG_COLOR_TYPE_PALETTE) { |
| int i, j, k; |
| uint8_t *pd = p->data[0]; |
| for (j = 0; j < s->height; j++) { |
| i = s->width / 8; |
| for (k = 7; k >= 1; k--) |
| if ((s->width&7) >= k) |
| pd[8*i + k - 1] = (pd[i]>>8-k) & 1; |
| for (i--; i >= 0; i--) { |
| pd[8*i + 7]= pd[i] & 1; |
| pd[8*i + 6]= (pd[i]>>1) & 1; |
| pd[8*i + 5]= (pd[i]>>2) & 1; |
| pd[8*i + 4]= (pd[i]>>3) & 1; |
| pd[8*i + 3]= (pd[i]>>4) & 1; |
| pd[8*i + 2]= (pd[i]>>5) & 1; |
| pd[8*i + 1]= (pd[i]>>6) & 1; |
| pd[8*i + 0]= pd[i]>>7; |
| } |
| pd += s->image_linesize; |
| } |
| } else if (s->bits_per_pixel == 2) { |
| int i, j; |
| uint8_t *pd = p->data[0]; |
| for (j = 0; j < s->height; j++) { |
| i = s->width / 4; |
| if (s->color_type == PNG_COLOR_TYPE_PALETTE) { |
| if ((s->width&3) >= 3) pd[4*i + 2]= (pd[i] >> 2) & 3; |
| if ((s->width&3) >= 2) pd[4*i + 1]= (pd[i] >> 4) & 3; |
| if ((s->width&3) >= 1) pd[4*i + 0]= pd[i] >> 6; |
| for (i--; i >= 0; i--) { |
| pd[4*i + 3]= pd[i] & 3; |
| pd[4*i + 2]= (pd[i]>>2) & 3; |
| pd[4*i + 1]= (pd[i]>>4) & 3; |
| pd[4*i + 0]= pd[i]>>6; |
| } |
| } else { |
| if ((s->width&3) >= 3) pd[4*i + 2]= ((pd[i]>>2) & 3)*0x55; |
| if ((s->width&3) >= 2) pd[4*i + 1]= ((pd[i]>>4) & 3)*0x55; |
| if ((s->width&3) >= 1) pd[4*i + 0]= ( pd[i]>>6 )*0x55; |
| for (i--; i >= 0; i--) { |
| pd[4*i + 3]= ( pd[i] & 3)*0x55; |
| pd[4*i + 2]= ((pd[i]>>2) & 3)*0x55; |
| pd[4*i + 1]= ((pd[i]>>4) & 3)*0x55; |
| pd[4*i + 0]= ( pd[i]>>6 )*0x55; |
| } |
| } |
| pd += s->image_linesize; |
| } |
| } else if (s->bits_per_pixel == 4) { |
| int i, j; |
| uint8_t *pd = p->data[0]; |
| for (j = 0; j < s->height; j++) { |
| i = s->width/2; |
| if (s->color_type == PNG_COLOR_TYPE_PALETTE) { |
| if (s->width&1) pd[2*i+0]= pd[i]>>4; |
| for (i--; i >= 0; i--) { |
| pd[2*i + 1] = pd[i] & 15; |
| pd[2*i + 0] = pd[i] >> 4; |
| } |
| } else { |
| if (s->width & 1) pd[2*i + 0]= (pd[i] >> 4) * 0x11; |
| for (i--; i >= 0; i--) { |
| pd[2*i + 1] = (pd[i] & 15) * 0x11; |
| pd[2*i + 0] = (pd[i] >> 4) * 0x11; |
| } |
| } |
| pd += s->image_linesize; |
| } |
| } |
| } |
| |
| static int decode_fctl_chunk(AVCodecContext *avctx, PNGDecContext *s, |
| uint32_t length) |
| { |
| uint32_t sequence_number; |
| int cur_w, cur_h, x_offset, y_offset, dispose_op, blend_op; |
| |
| if (length != 26) |
| return AVERROR_INVALIDDATA; |
| |
| if (!(s->hdr_state & PNG_IHDR)) { |
| av_log(avctx, AV_LOG_ERROR, "fctl before IHDR\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| s->last_w = s->cur_w; |
| s->last_h = s->cur_h; |
| s->last_x_offset = s->x_offset; |
| s->last_y_offset = s->y_offset; |
| s->last_dispose_op = s->dispose_op; |
| |
| sequence_number = bytestream2_get_be32(&s->gb); |
| cur_w = bytestream2_get_be32(&s->gb); |
| cur_h = bytestream2_get_be32(&s->gb); |
| x_offset = bytestream2_get_be32(&s->gb); |
| y_offset = bytestream2_get_be32(&s->gb); |
| bytestream2_skip(&s->gb, 4); /* delay_num (2), delay_den (2) */ |
| dispose_op = bytestream2_get_byte(&s->gb); |
| blend_op = bytestream2_get_byte(&s->gb); |
| bytestream2_skip(&s->gb, 4); /* crc */ |
| |
| if (sequence_number == 0 && |
| (cur_w != s->width || |
| cur_h != s->height || |
| x_offset != 0 || |
| y_offset != 0) || |
| cur_w <= 0 || cur_h <= 0 || |
| x_offset < 0 || y_offset < 0 || |
| cur_w > s->width - x_offset|| cur_h > s->height - y_offset) |
| return AVERROR_INVALIDDATA; |
| |
| if (blend_op != APNG_BLEND_OP_OVER && blend_op != APNG_BLEND_OP_SOURCE) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid blend_op %d\n", blend_op); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if ((sequence_number == 0 || !s->previous_picture.f->data[0]) && |
| dispose_op == APNG_DISPOSE_OP_PREVIOUS) { |
| // No previous frame to revert to for the first frame |
| // Spec says to just treat it as a APNG_DISPOSE_OP_BACKGROUND |
| dispose_op = APNG_DISPOSE_OP_BACKGROUND; |
| } |
| |
| if (blend_op == APNG_BLEND_OP_OVER && !s->has_trns && ( |
| avctx->pix_fmt == AV_PIX_FMT_RGB24 || |
| avctx->pix_fmt == AV_PIX_FMT_RGB48BE || |
| avctx->pix_fmt == AV_PIX_FMT_PAL8 || |
| avctx->pix_fmt == AV_PIX_FMT_GRAY8 || |
| avctx->pix_fmt == AV_PIX_FMT_GRAY16BE || |
| avctx->pix_fmt == AV_PIX_FMT_MONOBLACK |
| )) { |
| // APNG_BLEND_OP_OVER is the same as APNG_BLEND_OP_SOURCE when there is no alpha channel |
| blend_op = APNG_BLEND_OP_SOURCE; |
| } |
| |
| s->cur_w = cur_w; |
| s->cur_h = cur_h; |
| s->x_offset = x_offset; |
| s->y_offset = y_offset; |
| s->dispose_op = dispose_op; |
| s->blend_op = blend_op; |
| |
| return 0; |
| } |
| |
| static void handle_p_frame_png(PNGDecContext *s, AVFrame *p) |
| { |
| int i, j; |
| uint8_t *pd = p->data[0]; |
| uint8_t *pd_last = s->last_picture.f->data[0]; |
| int ls = FFMIN(av_image_get_linesize(p->format, s->width, 0), s->width * s->bpp); |
| |
| ff_thread_await_progress(&s->last_picture, INT_MAX, 0); |
| for (j = 0; j < s->height; j++) { |
| for (i = 0; i < ls; i++) |
| pd[i] += pd_last[i]; |
| pd += s->image_linesize; |
| pd_last += s->image_linesize; |
| } |
| } |
| |
| // divide by 255 and round to nearest |
| // apply a fast variant: (X+127)/255 = ((X+127)*257+257)>>16 = ((X+128)*257)>>16 |
| #define FAST_DIV255(x) ((((x) + 128) * 257) >> 16) |
| |
| static int handle_p_frame_apng(AVCodecContext *avctx, PNGDecContext *s, |
| AVFrame *p) |
| { |
| size_t x, y; |
| uint8_t *buffer; |
| |
| if (s->blend_op == APNG_BLEND_OP_OVER && |
| avctx->pix_fmt != AV_PIX_FMT_RGBA && |
| avctx->pix_fmt != AV_PIX_FMT_GRAY8A && |
| avctx->pix_fmt != AV_PIX_FMT_PAL8) { |
| avpriv_request_sample(avctx, "Blending with pixel format %s", |
| av_get_pix_fmt_name(avctx->pix_fmt)); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| buffer = av_malloc_array(s->image_linesize, s->height); |
| if (!buffer) |
| return AVERROR(ENOMEM); |
| |
| |
| // Do the disposal operation specified by the last frame on the frame |
| if (s->last_dispose_op != APNG_DISPOSE_OP_PREVIOUS) { |
| ff_thread_await_progress(&s->last_picture, INT_MAX, 0); |
| memcpy(buffer, s->last_picture.f->data[0], s->image_linesize * s->height); |
| |
| if (s->last_dispose_op == APNG_DISPOSE_OP_BACKGROUND) |
| for (y = s->last_y_offset; y < s->last_y_offset + s->last_h; ++y) |
| memset(buffer + s->image_linesize * y + s->bpp * s->last_x_offset, 0, s->bpp * s->last_w); |
| |
| memcpy(s->previous_picture.f->data[0], buffer, s->image_linesize * s->height); |
| ff_thread_report_progress(&s->previous_picture, INT_MAX, 0); |
| } else { |
| ff_thread_await_progress(&s->previous_picture, INT_MAX, 0); |
| memcpy(buffer, s->previous_picture.f->data[0], s->image_linesize * s->height); |
| } |
| |
| // Perform blending |
| if (s->blend_op == APNG_BLEND_OP_SOURCE) { |
| for (y = s->y_offset; y < s->y_offset + s->cur_h; ++y) { |
| size_t row_start = s->image_linesize * y + s->bpp * s->x_offset; |
| memcpy(buffer + row_start, p->data[0] + row_start, s->bpp * s->cur_w); |
| } |
| } else { // APNG_BLEND_OP_OVER |
| for (y = s->y_offset; y < s->y_offset + s->cur_h; ++y) { |
| uint8_t *foreground = p->data[0] + s->image_linesize * y + s->bpp * s->x_offset; |
| uint8_t *background = buffer + s->image_linesize * y + s->bpp * s->x_offset; |
| for (x = s->x_offset; x < s->x_offset + s->cur_w; ++x, foreground += s->bpp, background += s->bpp) { |
| size_t b; |
| uint8_t foreground_alpha, background_alpha, output_alpha; |
| uint8_t output[10]; |
| |
| // Since we might be blending alpha onto alpha, we use the following equations: |
| // output_alpha = foreground_alpha + (1 - foreground_alpha) * background_alpha |
| // output = (foreground_alpha * foreground + (1 - foreground_alpha) * background_alpha * background) / output_alpha |
| |
| switch (avctx->pix_fmt) { |
| case AV_PIX_FMT_RGBA: |
| foreground_alpha = foreground[3]; |
| background_alpha = background[3]; |
| break; |
| |
| case AV_PIX_FMT_GRAY8A: |
| foreground_alpha = foreground[1]; |
| background_alpha = background[1]; |
| break; |
| |
| case AV_PIX_FMT_PAL8: |
| foreground_alpha = s->palette[foreground[0]] >> 24; |
| background_alpha = s->palette[background[0]] >> 24; |
| break; |
| } |
| |
| if (foreground_alpha == 0) |
| continue; |
| |
| if (foreground_alpha == 255) { |
| memcpy(background, foreground, s->bpp); |
| continue; |
| } |
| |
| if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
| // TODO: Alpha blending with PAL8 will likely need the entire image converted over to RGBA first |
| avpriv_request_sample(avctx, "Alpha blending palette samples"); |
| background[0] = foreground[0]; |
| continue; |
| } |
| |
| output_alpha = foreground_alpha + FAST_DIV255((255 - foreground_alpha) * background_alpha); |
| |
| av_assert0(s->bpp <= 10); |
| |
| for (b = 0; b < s->bpp - 1; ++b) { |
| if (output_alpha == 0) { |
| output[b] = 0; |
| } else if (background_alpha == 255) { |
| output[b] = FAST_DIV255(foreground_alpha * foreground[b] + (255 - foreground_alpha) * background[b]); |
| } else { |
| output[b] = (255 * foreground_alpha * foreground[b] + (255 - foreground_alpha) * background_alpha * background[b]) / (255 * output_alpha); |
| } |
| } |
| output[b] = output_alpha; |
| memcpy(background, output, s->bpp); |
| } |
| } |
| } |
| |
| // Copy blended buffer into the frame and free |
| memcpy(p->data[0], buffer, s->image_linesize * s->height); |
| av_free(buffer); |
| |
| return 0; |
| } |
| |
| static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s, |
| AVFrame *p, AVPacket *avpkt) |
| { |
| AVDictionary **metadatap = NULL; |
| uint32_t tag, length; |
| int decode_next_dat = 0; |
| int i, ret; |
| |
| for (;;) { |
| length = bytestream2_get_bytes_left(&s->gb); |
| if (length <= 0) { |
| |
| if (avctx->codec_id == AV_CODEC_ID_PNG && |
| avctx->skip_frame == AVDISCARD_ALL) { |
| return 0; |
| } |
| |
| if (CONFIG_APNG_DECODER && avctx->codec_id == AV_CODEC_ID_APNG && length == 0) { |
| if (!(s->pic_state & PNG_IDAT)) |
| return 0; |
| else |
| goto exit_loop; |
| } |
| av_log(avctx, AV_LOG_ERROR, "%d bytes left\n", length); |
| if ( s->pic_state & PNG_ALLIMAGE |
| && avctx->strict_std_compliance <= FF_COMPLIANCE_NORMAL) |
| goto exit_loop; |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| |
| length = bytestream2_get_be32(&s->gb); |
| if (length > 0x7fffffff || length > bytestream2_get_bytes_left(&s->gb)) { |
| av_log(avctx, AV_LOG_ERROR, "chunk too big\n"); |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| tag = bytestream2_get_le32(&s->gb); |
| if (avctx->debug & FF_DEBUG_STARTCODE) |
| av_log(avctx, AV_LOG_DEBUG, "png: tag=%s length=%u\n", |
| av_fourcc2str(tag), length); |
| |
| if (avctx->codec_id == AV_CODEC_ID_PNG && |
| avctx->skip_frame == AVDISCARD_ALL) { |
| switch(tag) { |
| case MKTAG('I', 'H', 'D', 'R'): |
| case MKTAG('p', 'H', 'Y', 's'): |
| case MKTAG('t', 'E', 'X', 't'): |
| case MKTAG('I', 'D', 'A', 'T'): |
| case MKTAG('t', 'R', 'N', 'S'): |
| break; |
| default: |
| goto skip_tag; |
| } |
| } |
| |
| metadatap = &p->metadata; |
| switch (tag) { |
| case MKTAG('I', 'H', 'D', 'R'): |
| if ((ret = decode_ihdr_chunk(avctx, s, length)) < 0) |
| goto fail; |
| break; |
| case MKTAG('p', 'H', 'Y', 's'): |
| if ((ret = decode_phys_chunk(avctx, s)) < 0) |
| goto fail; |
| break; |
| case MKTAG('f', 'c', 'T', 'L'): |
| if (!CONFIG_APNG_DECODER || avctx->codec_id != AV_CODEC_ID_APNG) |
| goto skip_tag; |
| if ((ret = decode_fctl_chunk(avctx, s, length)) < 0) |
| goto fail; |
| decode_next_dat = 1; |
| break; |
| case MKTAG('f', 'd', 'A', 'T'): |
| if (!CONFIG_APNG_DECODER || avctx->codec_id != AV_CODEC_ID_APNG) |
| goto skip_tag; |
| if (!decode_next_dat) { |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| bytestream2_get_be32(&s->gb); |
| length -= 4; |
| /* fallthrough */ |
| case MKTAG('I', 'D', 'A', 'T'): |
| if (CONFIG_APNG_DECODER && avctx->codec_id == AV_CODEC_ID_APNG && !decode_next_dat) |
| goto skip_tag; |
| if ((ret = decode_idat_chunk(avctx, s, length, p)) < 0) |
| goto fail; |
| break; |
| case MKTAG('P', 'L', 'T', 'E'): |
| if (decode_plte_chunk(avctx, s, length) < 0) |
| goto skip_tag; |
| break; |
| case MKTAG('t', 'R', 'N', 'S'): |
| if (decode_trns_chunk(avctx, s, length) < 0) |
| goto skip_tag; |
| break; |
| case MKTAG('t', 'E', 'X', 't'): |
| if (decode_text_chunk(s, length, 0, metadatap) < 0) |
| av_log(avctx, AV_LOG_WARNING, "Broken tEXt chunk\n"); |
| bytestream2_skip(&s->gb, length + 4); |
| break; |
| case MKTAG('z', 'T', 'X', 't'): |
| if (decode_text_chunk(s, length, 1, metadatap) < 0) |
| av_log(avctx, AV_LOG_WARNING, "Broken zTXt chunk\n"); |
| bytestream2_skip(&s->gb, length + 4); |
| break; |
| case MKTAG('s', 'T', 'E', 'R'): { |
| int mode = bytestream2_get_byte(&s->gb); |
| AVStereo3D *stereo3d = av_stereo3d_create_side_data(p); |
| if (!stereo3d) |
| goto fail; |
| |
| if (mode == 0 || mode == 1) { |
| stereo3d->type = AV_STEREO3D_SIDEBYSIDE; |
| stereo3d->flags = mode ? 0 : AV_STEREO3D_FLAG_INVERT; |
| } else { |
| av_log(avctx, AV_LOG_WARNING, |
| "Unknown value in sTER chunk (%d)\n", mode); |
| } |
| bytestream2_skip(&s->gb, 4); /* crc */ |
| break; |
| } |
| case MKTAG('i', 'C', 'C', 'P'): { |
| if (decode_iccp_chunk(s, length, p) < 0) |
| goto fail; |
| break; |
| } |
| case MKTAG('c', 'H', 'R', 'M'): { |
| AVMasteringDisplayMetadata *mdm = av_mastering_display_metadata_create_side_data(p); |
| if (!mdm) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| |
| mdm->white_point[0] = av_make_q(bytestream2_get_be32(&s->gb), 100000); |
| mdm->white_point[1] = av_make_q(bytestream2_get_be32(&s->gb), 100000); |
| |
| /* RGB Primaries */ |
| for (i = 0; i < 3; i++) { |
| mdm->display_primaries[i][0] = av_make_q(bytestream2_get_be32(&s->gb), 100000); |
| mdm->display_primaries[i][1] = av_make_q(bytestream2_get_be32(&s->gb), 100000); |
| } |
| |
| mdm->has_primaries = 1; |
| bytestream2_skip(&s->gb, 4); /* crc */ |
| break; |
| } |
| case MKTAG('g', 'A', 'M', 'A'): { |
| AVBPrint bp; |
| char *gamma_str; |
| int num = bytestream2_get_be32(&s->gb); |
| |
| av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED); |
| av_bprintf(&bp, "%i/%i", num, 100000); |
| ret = av_bprint_finalize(&bp, &gamma_str); |
| if (ret < 0) |
| return ret; |
| |
| av_dict_set(&p->metadata, "gamma", gamma_str, AV_DICT_DONT_STRDUP_VAL); |
| |
| bytestream2_skip(&s->gb, 4); /* crc */ |
| break; |
| } |
| case MKTAG('I', 'E', 'N', 'D'): |
| if (!(s->pic_state & PNG_ALLIMAGE)) |
| av_log(avctx, AV_LOG_ERROR, "IEND without all image\n"); |
| if (!(s->pic_state & (PNG_ALLIMAGE|PNG_IDAT))) { |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| bytestream2_skip(&s->gb, 4); /* crc */ |
| goto exit_loop; |
| default: |
| /* skip tag */ |
| skip_tag: |
| bytestream2_skip(&s->gb, length + 4); |
| break; |
| } |
| } |
| exit_loop: |
| |
| if (avctx->codec_id == AV_CODEC_ID_PNG && |
| avctx->skip_frame == AVDISCARD_ALL) { |
| return 0; |
| } |
| |
| if (s->bits_per_pixel <= 4) |
| handle_small_bpp(s, p); |
| |
| /* apply transparency if needed */ |
| if (s->has_trns && s->color_type != PNG_COLOR_TYPE_PALETTE) { |
| size_t byte_depth = s->bit_depth > 8 ? 2 : 1; |
| size_t raw_bpp = s->bpp - byte_depth; |
| unsigned x, y; |
| |
| av_assert0(s->bit_depth > 1); |
| |
| 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 (!memcmp(pixel, s->transparent_color_be, raw_bpp)) { |
| memset(&pixel[raw_bpp], 0, byte_depth); |
| } else { |
| memset(&pixel[raw_bpp], 0xff, byte_depth); |
| } |
| } |
| } |
| } |
| |
| /* handle P-frames only if a predecessor frame is available */ |
| if (s->last_picture.f->data[0]) { |
| if ( !(avpkt->flags & AV_PKT_FLAG_KEY) && avctx->codec_tag != AV_RL32("MPNG") |
| && s->last_picture.f->width == p->width |
| && s->last_picture.f->height== p->height |
| && s->last_picture.f->format== p->format |
| ) { |
| if (CONFIG_PNG_DECODER && avctx->codec_id != AV_CODEC_ID_APNG) |
| handle_p_frame_png(s, p); |
| else if (CONFIG_APNG_DECODER && |
| avctx->codec_id == AV_CODEC_ID_APNG && |
| (ret = handle_p_frame_apng(avctx, s, p)) < 0) |
| goto fail; |
| } |
| } |
| ff_thread_report_progress(&s->picture, INT_MAX, 0); |
| ff_thread_report_progress(&s->previous_picture, INT_MAX, 0); |
| |
| return 0; |
| |
| fail: |
| ff_thread_report_progress(&s->picture, INT_MAX, 0); |
| ff_thread_report_progress(&s->previous_picture, INT_MAX, 0); |
| return ret; |
| } |
| |
| #if CONFIG_PNG_DECODER |
| static int decode_frame_png(AVCodecContext *avctx, |
| void *data, int *got_frame, |
| AVPacket *avpkt) |
| { |
| PNGDecContext *const s = avctx->priv_data; |
| const uint8_t *buf = avpkt->data; |
| int buf_size = avpkt->size; |
| AVFrame *p; |
| int64_t sig; |
| int ret; |
| |
| ff_thread_release_buffer(avctx, &s->last_picture); |
| FFSWAP(ThreadFrame, s->picture, s->last_picture); |
| p = s->picture.f; |
| |
| bytestream2_init(&s->gb, buf, buf_size); |
| |
| /* check signature */ |
| sig = bytestream2_get_be64(&s->gb); |
| if (sig != PNGSIG && |
| sig != MNGSIG) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid PNG signature 0x%08"PRIX64".\n", sig); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| s->y = s->has_trns = 0; |
| s->hdr_state = 0; |
| s->pic_state = 0; |
| |
| /* init the zlib */ |
| s->zstream.zalloc = ff_png_zalloc; |
| s->zstream.zfree = ff_png_zfree; |
| s->zstream.opaque = NULL; |
| ret = inflateInit(&s->zstream); |
| if (ret != Z_OK) { |
| av_log(avctx, AV_LOG_ERROR, "inflateInit returned error %d\n", ret); |
| return AVERROR_EXTERNAL; |
| } |
| |
| if ((ret = decode_frame_common(avctx, s, p, avpkt)) < 0) |
| goto the_end; |
| |
| if (avctx->skip_frame == AVDISCARD_ALL) { |
| *got_frame = 0; |
| ret = bytestream2_tell(&s->gb); |
| goto the_end; |
| } |
| |
| if ((ret = av_frame_ref(data, s->picture.f)) < 0) |
| goto the_end; |
| |
| *got_frame = 1; |
| |
| ret = bytestream2_tell(&s->gb); |
| the_end: |
| inflateEnd(&s->zstream); |
| s->crow_buf = NULL; |
| return ret; |
| } |
| #endif |
| |
| #if CONFIG_APNG_DECODER |
| static int decode_frame_apng(AVCodecContext *avctx, |
| void *data, int *got_frame, |
| AVPacket *avpkt) |
| { |
| PNGDecContext *const s = avctx->priv_data; |
| int ret; |
| AVFrame *p; |
| |
| ff_thread_release_buffer(avctx, &s->last_picture); |
| FFSWAP(ThreadFrame, s->picture, s->last_picture); |
| p = s->picture.f; |
| |
| if (!(s->hdr_state & PNG_IHDR)) { |
| if (!avctx->extradata_size) |
| return AVERROR_INVALIDDATA; |
| |
| /* only init fields, there is no zlib use in extradata */ |
| s->zstream.zalloc = ff_png_zalloc; |
| s->zstream.zfree = ff_png_zfree; |
| |
| bytestream2_init(&s->gb, avctx->extradata, avctx->extradata_size); |
| if ((ret = decode_frame_common(avctx, s, p, avpkt)) < 0) |
| goto end; |
| } |
| |
| /* reset state for a new frame */ |
| if ((ret = inflateInit(&s->zstream)) != Z_OK) { |
| av_log(avctx, AV_LOG_ERROR, "inflateInit returned error %d\n", ret); |
| ret = AVERROR_EXTERNAL; |
| goto end; |
| } |
| s->y = 0; |
| s->pic_state = 0; |
| bytestream2_init(&s->gb, avpkt->data, avpkt->size); |
| if ((ret = decode_frame_common(avctx, s, p, avpkt)) < 0) |
| goto end; |
| |
| if (!(s->pic_state & PNG_ALLIMAGE)) |
| av_log(avctx, AV_LOG_WARNING, "Frame did not contain a complete image\n"); |
| if (!(s->pic_state & (PNG_ALLIMAGE|PNG_IDAT))) { |
| ret = AVERROR_INVALIDDATA; |
| goto end; |
| } |
| if ((ret = av_frame_ref(data, s->picture.f)) < 0) |
| goto end; |
| |
| *got_frame = 1; |
| ret = bytestream2_tell(&s->gb); |
| |
| end: |
| inflateEnd(&s->zstream); |
| return ret; |
| } |
| #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; |
| |
| 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) |
| 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) |
| { |
| PNGDecContext *psrc = src->priv_data; |
| PNGDecContext *pdst = dst->priv_data; |
| int ret; |
| |
| if (dst == src) |
| return 0; |
| |
| ff_thread_release_buffer(dst, &pdst->picture); |
| if (psrc->picture.f->data[0] && |
| (ret = ff_thread_ref_frame(&pdst->picture, &psrc->picture)) < 0) |
| return ret; |
| if (CONFIG_APNG_DECODER && dst->codec_id == AV_CODEC_ID_APNG) { |
| pdst->width = psrc->width; |
| pdst->height = psrc->height; |
| pdst->bit_depth = psrc->bit_depth; |
| pdst->color_type = psrc->color_type; |
| pdst->compression_type = psrc->compression_type; |
| pdst->interlace_type = psrc->interlace_type; |
| pdst->filter_type = psrc->filter_type; |
| pdst->cur_w = psrc->cur_w; |
| pdst->cur_h = psrc->cur_h; |
| pdst->x_offset = psrc->x_offset; |
| pdst->y_offset = psrc->y_offset; |
| pdst->has_trns = psrc->has_trns; |
| memcpy(pdst->transparent_color_be, psrc->transparent_color_be, sizeof(pdst->transparent_color_be)); |
| |
| pdst->dispose_op = psrc->dispose_op; |
| |
| memcpy(pdst->palette, psrc->palette, sizeof(pdst->palette)); |
| |
| pdst->hdr_state |= psrc->hdr_state; |
| |
| ff_thread_release_buffer(dst, &pdst->last_picture); |
| if (psrc->last_picture.f->data[0] && |
| (ret = ff_thread_ref_frame(&pdst->last_picture, &psrc->last_picture)) < 0) |
| return ret; |
| |
| ff_thread_release_buffer(dst, &pdst->previous_picture); |
| if (psrc->previous_picture.f->data[0] && |
| (ret = ff_thread_ref_frame(&pdst->previous_picture, &psrc->previous_picture)) < 0) |
| return ret; |
| } |
| |
| return 0; |
| } |
| #endif |
| |
| static av_cold int png_dec_init(AVCodecContext *avctx) |
| { |
| PNGDecContext *s = avctx->priv_data; |
| |
| 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(); |
| s->picture.f = av_frame_alloc(); |
| if (!s->previous_picture.f || !s->last_picture.f || !s->picture.f) { |
| av_frame_free(&s->previous_picture.f); |
| av_frame_free(&s->last_picture.f); |
| av_frame_free(&s->picture.f); |
| return AVERROR(ENOMEM); |
| } |
| |
| if (!avctx->internal->is_copy) { |
| avctx->internal->allocate_progress = 1; |
| ff_pngdsp_init(&s->dsp); |
| } |
| |
| return 0; |
| } |
| |
| static av_cold int png_dec_end(AVCodecContext *avctx) |
| { |
| PNGDecContext *s = avctx->priv_data; |
| |
| ff_thread_release_buffer(avctx, &s->previous_picture); |
| av_frame_free(&s->previous_picture.f); |
| ff_thread_release_buffer(avctx, &s->last_picture); |
| 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; |
| av_freep(&s->tmp_row); |
| s->tmp_row_size = 0; |
| |
| return 0; |
| } |
| |
| #if CONFIG_APNG_DECODER |
| AVCodec ff_apng_decoder = { |
| .name = "apng", |
| .long_name = NULL_IF_CONFIG_SMALL("APNG (Animated Portable Network Graphics) image"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_APNG, |
| .priv_data_size = sizeof(PNGDecContext), |
| .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, |
| }; |
| #endif |
| |
| #if CONFIG_PNG_DECODER |
| AVCodec ff_png_decoder = { |
| .name = "png", |
| .long_name = NULL_IF_CONFIG_SMALL("PNG (Portable Network Graphics) image"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_PNG, |
| .priv_data_size = sizeof(PNGDecContext), |
| .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, |
| }; |
| #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, |
| }; |
| #endif |