mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-24 11:49:48 +00:00
1ec94b0f06
Coccinelle profile used:
@@
expression r, ctx, f, loglevel, str, flags;
@@
-if ((r = ff_get_buffer(ctx, f, flags)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_get_buffer(ctx, f, flags)) < 0)
+ return r;
@@
expression r, ctx, f, loglevel, str;
@@
-if ((r = ff_reget_buffer(ctx, f)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_reget_buffer(ctx, f)) < 0)
+ return r;
@@
expression r, ctx, f, loglevel, str, flags;
@@
-if ((r = ff_thread_get_buffer(ctx, f, flags)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_thread_get_buffer(ctx, f, flags)) < 0)
+ return r;
...along with some manual patches for the remaining ones.
235 lines
7.2 KiB
C
235 lines
7.2 KiB
C
/*
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* PC Paintbrush PCX (.pcx) image decoder
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* Copyright (c) 2007, 2008 Ivo van Poorten
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*
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* This decoder does not support CGA palettes. I am unable to find samples
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* and Netpbm cannot generate them.
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/imgutils.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "get_bits.h"
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#include "internal.h"
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static void pcx_rle_decode(GetByteContext *gb, uint8_t *dst,
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unsigned int bytes_per_scanline, int compressed)
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{
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unsigned int i = 0;
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unsigned char run, value;
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if (compressed) {
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while (i<bytes_per_scanline) {
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run = 1;
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value = bytestream2_get_byte(gb);
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if (value >= 0xc0) {
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run = value & 0x3f;
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value = bytestream2_get_byte(gb);
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}
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while (i<bytes_per_scanline && run--)
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dst[i++] = value;
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}
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} else {
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bytestream2_get_buffer(gb, dst, bytes_per_scanline);
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}
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}
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static void pcx_palette(GetByteContext *gb, uint32_t *dst, int pallen)
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{
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int i;
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pallen = FFMIN(pallen, bytestream2_get_bytes_left(gb) / 3);
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for (i=0; i<pallen; i++)
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*dst++ = 0xFF000000 | bytestream2_get_be24u(gb);
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if (pallen < 256)
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memset(dst, 0, (256 - pallen) * sizeof(*dst));
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}
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static int pcx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
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AVPacket *avpkt) {
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GetByteContext gb;
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AVFrame * const p = data;
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int compressed, xmin, ymin, xmax, ymax, ret;
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unsigned int w, h, bits_per_pixel, bytes_per_line, nplanes, stride, y, x,
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bytes_per_scanline;
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uint8_t *ptr, *scanline;
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if (avpkt->size < 128)
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return AVERROR_INVALIDDATA;
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bytestream2_init(&gb, avpkt->data, avpkt->size);
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if (bytestream2_get_byteu(&gb) != 0x0a || bytestream2_get_byteu(&gb) > 5) {
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av_log(avctx, AV_LOG_ERROR, "this is not PCX encoded data\n");
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return AVERROR_INVALIDDATA;
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}
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compressed = bytestream2_get_byteu(&gb);
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bits_per_pixel = bytestream2_get_byteu(&gb);
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xmin = bytestream2_get_le16u(&gb);
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ymin = bytestream2_get_le16u(&gb);
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xmax = bytestream2_get_le16u(&gb);
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ymax = bytestream2_get_le16u(&gb);
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avctx->sample_aspect_ratio.num = bytestream2_get_le16u(&gb);
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avctx->sample_aspect_ratio.den = bytestream2_get_le16u(&gb);
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if (xmax < xmin || ymax < ymin) {
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av_log(avctx, AV_LOG_ERROR, "invalid image dimensions\n");
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return AVERROR_INVALIDDATA;
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}
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w = xmax - xmin + 1;
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h = ymax - ymin + 1;
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bytestream2_skipu(&gb, 49);
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nplanes = bytestream2_get_byteu(&gb);
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bytes_per_line = bytestream2_get_le16u(&gb);
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bytes_per_scanline = nplanes * bytes_per_line;
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if (bytes_per_scanline < (w * bits_per_pixel * nplanes + 7) / 8) {
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av_log(avctx, AV_LOG_ERROR, "PCX data is corrupted\n");
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return AVERROR_INVALIDDATA;
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}
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switch ((nplanes<<8) + bits_per_pixel) {
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case 0x0308:
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avctx->pix_fmt = AV_PIX_FMT_RGB24;
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break;
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case 0x0108:
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case 0x0104:
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case 0x0102:
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case 0x0101:
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case 0x0401:
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case 0x0301:
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case 0x0201:
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avctx->pix_fmt = AV_PIX_FMT_PAL8;
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break;
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default:
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av_log(avctx, AV_LOG_ERROR, "invalid PCX file\n");
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return AVERROR_INVALIDDATA;
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}
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bytestream2_skipu(&gb, 60);
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if ((ret = av_image_check_size(w, h, 0, avctx)) < 0)
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return ret;
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if (w != avctx->width || h != avctx->height)
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avcodec_set_dimensions(avctx, w, h);
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if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
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return ret;
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p->pict_type = AV_PICTURE_TYPE_I;
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ptr = p->data[0];
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stride = p->linesize[0];
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scanline = av_malloc(bytes_per_scanline + FF_INPUT_BUFFER_PADDING_SIZE);
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if (!scanline)
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return AVERROR(ENOMEM);
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if (nplanes == 3 && bits_per_pixel == 8) {
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for (y=0; y<h; y++) {
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pcx_rle_decode(&gb, scanline, bytes_per_scanline, compressed);
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for (x=0; x<w; x++) {
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ptr[3*x ] = scanline[x ];
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ptr[3*x+1] = scanline[x+ bytes_per_line ];
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ptr[3*x+2] = scanline[x+(bytes_per_line<<1)];
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}
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ptr += stride;
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}
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} else if (nplanes == 1 && bits_per_pixel == 8) {
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int palstart = avpkt->size - 769;
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for (y=0; y<h; y++, ptr+=stride) {
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pcx_rle_decode(&gb, scanline, bytes_per_scanline, compressed);
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memcpy(ptr, scanline, w);
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}
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if (bytestream2_tell(&gb) != palstart) {
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av_log(avctx, AV_LOG_WARNING, "image data possibly corrupted\n");
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bytestream2_seek(&gb, palstart, SEEK_SET);
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}
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if (bytestream2_get_byte(&gb) != 12) {
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av_log(avctx, AV_LOG_ERROR, "expected palette after image data\n");
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ret = AVERROR_INVALIDDATA;
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goto end;
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}
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} else if (nplanes == 1) { /* all packed formats, max. 16 colors */
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GetBitContext s;
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for (y=0; y<h; y++) {
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init_get_bits8(&s, scanline, bytes_per_scanline);
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pcx_rle_decode(&gb, scanline, bytes_per_scanline, compressed);
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for (x=0; x<w; x++)
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ptr[x] = get_bits(&s, bits_per_pixel);
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ptr += stride;
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}
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} else { /* planar, 4, 8 or 16 colors */
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int i;
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for (y=0; y<h; y++) {
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pcx_rle_decode(&gb, scanline, bytes_per_scanline, compressed);
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for (x=0; x<w; x++) {
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int m = 0x80 >> (x&7), v = 0;
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for (i=nplanes - 1; i>=0; i--) {
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v <<= 1;
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v += !!(scanline[i*bytes_per_line + (x>>3)] & m);
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}
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ptr[x] = v;
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}
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ptr += stride;
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}
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}
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ret = bytestream2_tell(&gb);
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if (nplanes == 1 && bits_per_pixel == 8) {
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pcx_palette(&gb, (uint32_t *) p->data[1], 256);
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ret += 256 * 3;
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} else if (bits_per_pixel * nplanes == 1) {
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AV_WN32A(p->data[1] , 0xFF000000);
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AV_WN32A(p->data[1]+4, 0xFFFFFFFF);
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} else if (bits_per_pixel < 8) {
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bytestream2_seek(&gb, 16, SEEK_SET);
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pcx_palette(&gb, (uint32_t *) p->data[1], 16);
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}
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*got_frame = 1;
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end:
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av_free(scanline);
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return ret;
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}
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AVCodec ff_pcx_decoder = {
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.name = "pcx",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_PCX,
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.decode = pcx_decode_frame,
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.capabilities = CODEC_CAP_DR1,
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.long_name = NULL_IF_CONFIG_SMALL("PC Paintbrush PCX image"),
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};
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