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Diffstat (limited to 'ffmpeg1/libavcodec/targa.c')
-rw-r--r--ffmpeg1/libavcodec/targa.c307
1 files changed, 0 insertions, 307 deletions
diff --git a/ffmpeg1/libavcodec/targa.c b/ffmpeg1/libavcodec/targa.c
deleted file mode 100644
index ff4390f..0000000
--- a/ffmpeg1/libavcodec/targa.c
+++ /dev/null
@@ -1,307 +0,0 @@
-/*
- * Targa (.tga) image decoder
- * Copyright (c) 2006 Konstantin Shishkov
- *
- * 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
- */
-
-#include "libavutil/intreadwrite.h"
-#include "libavutil/imgutils.h"
-#include "avcodec.h"
-#include "bytestream.h"
-#include "internal.h"
-#include "targa.h"
-
-typedef struct TargaContext {
- GetByteContext gb;
-} TargaContext;
-
-static uint8_t *advance_line(uint8_t *start, uint8_t *line,
- int stride, int *y, int h, int interleave)
-{
- *y += interleave;
-
- if (*y < h) {
- return line + interleave * stride;
- } else {
- *y = (*y + 1) & (interleave - 1);
- if (*y && *y < h) {
- return start + *y * stride;
- } else {
- return NULL;
- }
- }
-}
-
-static int targa_decode_rle(AVCodecContext *avctx, TargaContext *s,
- uint8_t *start, int w, int h, int stride,
- int bpp, int interleave)
-{
- int x, y;
- int depth = (bpp + 1) >> 3;
- int type, count;
- uint8_t *line = start;
- uint8_t *dst = line;
-
- x = y = count = 0;
- while (dst) {
- if (bytestream2_get_bytes_left(&s->gb) <= 0) {
- av_log(avctx, AV_LOG_ERROR,
- "Ran ouf of data before end-of-image\n");
- return AVERROR_INVALIDDATA;
- }
- type = bytestream2_get_byteu(&s->gb);
- count = (type & 0x7F) + 1;
- type &= 0x80;
- if (!type) {
- do {
- int n = FFMIN(count, w - x);
- bytestream2_get_buffer(&s->gb, dst, n * depth);
- count -= n;
- dst += n * depth;
- x += n;
- if (x == w) {
- x = 0;
- dst = line = advance_line(start, line, stride, &y, h, interleave);
- }
- } while (dst && count > 0);
- } else {
- uint8_t tmp[4];
- bytestream2_get_buffer(&s->gb, tmp, depth);
- do {
- int n = FFMIN(count, w - x);
- count -= n;
- x += n;
- do {
- memcpy(dst, tmp, depth);
- dst += depth;
- } while (--n);
- if (x == w) {
- x = 0;
- dst = line = advance_line(start, line, stride, &y, h, interleave);
- }
- } while (dst && count > 0);
- }
- }
-
- if (count) {
- av_log(avctx, AV_LOG_ERROR, "Packet went out of bounds\n");
- return AVERROR_INVALIDDATA;
- }
-
- return 0;
-}
-
-static int decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame,
- AVPacket *avpkt)
-{
- TargaContext * const s = avctx->priv_data;
- AVFrame * const p = data;
- uint8_t *dst;
- int stride;
- int idlen, pal, compr, y, w, h, bpp, flags, ret;
- int first_clr, colors, csize;
- int interleave;
-
- bytestream2_init(&s->gb, avpkt->data, avpkt->size);
-
- /* parse image header */
- idlen = bytestream2_get_byte(&s->gb);
- pal = bytestream2_get_byte(&s->gb);
- compr = bytestream2_get_byte(&s->gb);
- first_clr = bytestream2_get_le16(&s->gb);
- colors = bytestream2_get_le16(&s->gb);
- csize = bytestream2_get_byte(&s->gb);
- bytestream2_skip(&s->gb, 4); /* 2: x, 2: y */
- w = bytestream2_get_le16(&s->gb);
- h = bytestream2_get_le16(&s->gb);
- bpp = bytestream2_get_byte(&s->gb);
-
- if (bytestream2_get_bytes_left(&s->gb) <= idlen) {
- av_log(avctx, AV_LOG_ERROR,
- "Not enough data to read header\n");
- return AVERROR_INVALIDDATA;
- }
-
- flags = bytestream2_get_byte(&s->gb);
-
- if (!pal && (first_clr || colors || csize)) {
- av_log(avctx, AV_LOG_WARNING, "File without colormap has colormap information set.\n");
- // specification says we should ignore those value in this case
- first_clr = colors = csize = 0;
- }
-
- // skip identifier if any
- bytestream2_skip(&s->gb, idlen);
-
- switch (bpp) {
- case 8:
- avctx->pix_fmt = ((compr & (~TGA_RLE)) == TGA_BW) ? AV_PIX_FMT_GRAY8 : AV_PIX_FMT_PAL8;
- break;
- case 15:
- case 16:
- avctx->pix_fmt = AV_PIX_FMT_RGB555LE;
- break;
- case 24:
- avctx->pix_fmt = AV_PIX_FMT_BGR24;
- break;
- case 32:
- avctx->pix_fmt = AV_PIX_FMT_BGRA;
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Bit depth %i is not supported\n", bpp);
- return AVERROR_INVALIDDATA;
- }
-
- if (colors && (colors + first_clr) > 256) {
- av_log(avctx, AV_LOG_ERROR, "Incorrect palette: %i colors with offset %i\n", colors, first_clr);
- return AVERROR_INVALIDDATA;
- }
-
- if ((ret = av_image_check_size(w, h, 0, avctx)) < 0)
- return ret;
- if (w != avctx->width || h != avctx->height)
- avcodec_set_dimensions(avctx, w, h);
- if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
- return ret;
-
- if (flags & TGA_TOPTOBOTTOM) {
- dst = p->data[0];
- stride = p->linesize[0];
- } else { //image is upside-down
- dst = p->data[0] + p->linesize[0] * (h - 1);
- stride = -p->linesize[0];
- }
-
- interleave = flags & TGA_INTERLEAVE2 ? 2 :
- flags & TGA_INTERLEAVE4 ? 4 : 1;
-
- if (colors) {
- int pal_size, pal_sample_size;
-
- switch (csize) {
- case 32: pal_sample_size = 4; break;
- case 24: pal_sample_size = 3; break;
- case 16:
- case 15: pal_sample_size = 2; break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Palette entry size %i bits is not supported\n", csize);
- return AVERROR_INVALIDDATA;
- }
- pal_size = colors * pal_sample_size;
- if (avctx->pix_fmt != AV_PIX_FMT_PAL8) //should not occur but skip palette anyway
- bytestream2_skip(&s->gb, pal_size);
- else {
- int t;
- uint32_t *pal = ((uint32_t *)p->data[1]) + first_clr;
-
- if (bytestream2_get_bytes_left(&s->gb) < pal_size) {
- av_log(avctx, AV_LOG_ERROR,
- "Not enough data to read palette\n");
- return AVERROR_INVALIDDATA;
- }
- switch (pal_sample_size) {
- case 4:
- for (t = 0; t < colors; t++)
- *pal++ = bytestream2_get_le32u(&s->gb);
- break;
- case 3:
- /* RGB24 */
- for (t = 0; t < colors; t++)
- *pal++ = (0xffU<<24) | bytestream2_get_le24u(&s->gb);
- break;
- case 2:
- /* RGB555 */
- for (t = 0; t < colors; t++) {
- uint32_t v = bytestream2_get_le16u(&s->gb);
- v = ((v & 0x7C00) << 9) |
- ((v & 0x03E0) << 6) |
- ((v & 0x001F) << 3);
- /* left bit replication */
- v |= (v & 0xE0E0E0U) >> 5;
- *pal++ = (0xffU<<24) | v;
- }
- break;
- }
- p->palette_has_changed = 1;
- }
- }
-
- if ((compr & (~TGA_RLE)) == TGA_NODATA) {
- memset(p->data[0], 0, p->linesize[0] * h);
- } else {
- if (compr & TGA_RLE) {
- int res = targa_decode_rle(avctx, s, dst, w, h, stride, bpp, interleave);
- if (res < 0)
- return res;
- } else {
- size_t img_size = w * ((bpp + 1) >> 3);
- uint8_t *line;
- if (bytestream2_get_bytes_left(&s->gb) < img_size * h) {
- av_log(avctx, AV_LOG_ERROR,
- "Not enough data available for image\n");
- return AVERROR_INVALIDDATA;
- }
-
- line = dst;
- y = 0;
- do {
- bytestream2_get_buffer(&s->gb, line, img_size);
- line = advance_line(dst, line, stride, &y, h, interleave);
- } while (line);
- }
- }
-
- if (flags & TGA_RIGHTTOLEFT) { // right-to-left, needs horizontal flip
- int x;
- for (y = 0; y < h; y++) {
- void *line = &p->data[0][y * p->linesize[0]];
- for (x = 0; x < w >> 1; x++) {
- switch (bpp) {
- case 32:
- FFSWAP(uint32_t, ((uint32_t *)line)[x], ((uint32_t *)line)[w - x - 1]);
- break;
- case 24:
- FFSWAP(uint8_t, ((uint8_t *)line)[3 * x ], ((uint8_t *)line)[3 * w - 3 * x - 3]);
- FFSWAP(uint8_t, ((uint8_t *)line)[3 * x + 1], ((uint8_t *)line)[3 * w - 3 * x - 2]);
- FFSWAP(uint8_t, ((uint8_t *)line)[3 * x + 2], ((uint8_t *)line)[3 * w - 3 * x - 1]);
- break;
- case 16:
- FFSWAP(uint16_t, ((uint16_t *)line)[x], ((uint16_t *)line)[w - x - 1]);
- break;
- case 8:
- FFSWAP(uint8_t, ((uint8_t *)line)[x], ((uint8_t *)line)[w - x - 1]);
- }
- }
- }
- }
-
- *got_frame = 1;
-
- return avpkt->size;
-}
-
-AVCodec ff_targa_decoder = {
- .name = "targa",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_TARGA,
- .priv_data_size = sizeof(TargaContext),
- .decode = decode_frame,
- .capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("Truevision Targa image"),
-};
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