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Diffstat (limited to 'ffmpeg1/libavcodec/qtrle.c')
-rw-r--r--ffmpeg1/libavcodec/qtrle.c526
1 files changed, 0 insertions, 526 deletions
diff --git a/ffmpeg1/libavcodec/qtrle.c b/ffmpeg1/libavcodec/qtrle.c
deleted file mode 100644
index c043249..0000000
--- a/ffmpeg1/libavcodec/qtrle.c
+++ /dev/null
@@ -1,526 +0,0 @@
-/*
- * Quicktime Animation (RLE) Video Decoder
- * Copyright (C) 2004 the ffmpeg project
- *
- * 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
- */
-
-/**
- * @file
- * QT RLE Video Decoder by Mike Melanson (melanson@pcisys.net)
- * For more information about the QT RLE format, visit:
- * http://www.pcisys.net/~melanson/codecs/
- *
- * The QT RLE decoder has seven modes of operation:
- * 1, 2, 4, 8, 16, 24, and 32 bits per pixel. For modes 1, 2, 4, and 8
- * the decoder outputs PAL8 colorspace data. 16-bit data yields RGB555
- * data. 24-bit data is RGB24 and 32-bit data is RGB32.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "avcodec.h"
-#include "bytestream.h"
-#include "internal.h"
-
-typedef struct QtrleContext {
- AVCodecContext *avctx;
- AVFrame frame;
-
- GetByteContext g;
- uint32_t pal[256];
-} QtrleContext;
-
-#define CHECK_PIXEL_PTR(n) \
- if ((pixel_ptr + n > pixel_limit) || (pixel_ptr + n < 0)) { \
- av_log (s->avctx, AV_LOG_ERROR, "Problem: pixel_ptr = %d, pixel_limit = %d\n",\
- pixel_ptr + n, pixel_limit); \
- return; \
- } \
-
-static void qtrle_decode_1bpp(QtrleContext *s, int row_ptr, int lines_to_change)
-{
- int rle_code;
- int pixel_ptr;
- int row_inc = s->frame.linesize[0];
- unsigned char pi0, pi1; /* 2 8-pixel values */
- unsigned char *rgb = s->frame.data[0];
- int pixel_limit = s->frame.linesize[0] * s->avctx->height;
- int skip;
- /* skip & 0x80 appears to mean 'start a new line', which can be interpreted
- * as 'go to next line' during the decoding of a frame but is 'go to first
- * line' at the beginning. Since we always interpret it as 'go to next line'
- * in the decoding loop (which makes code simpler/faster), the first line
- * would not be counted, so we count one more.
- * See: https://ffmpeg.org/trac/ffmpeg/ticket/226
- * In the following decoding loop, row_ptr will be the position of the
- * current row. */
-
- row_ptr -= row_inc;
- pixel_ptr = row_ptr;
- lines_to_change++;
- while (lines_to_change) {
- skip = bytestream2_get_byte(&s->g);
- rle_code = (signed char)bytestream2_get_byte(&s->g);
- if (rle_code == 0)
- break;
- if(skip & 0x80) {
- lines_to_change--;
- row_ptr += row_inc;
- pixel_ptr = row_ptr + 2 * (skip & 0x7f);
- } else
- pixel_ptr += 2 * skip;
- CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
-
- if(rle_code == -1)
- continue;
-
- if (rle_code < 0) {
- /* decode the run length code */
- rle_code = -rle_code;
- /* get the next 2 bytes from the stream, treat them as groups
- * of 8 pixels, and output them rle_code times */
-
- pi0 = bytestream2_get_byte(&s->g);
- pi1 = bytestream2_get_byte(&s->g);
- CHECK_PIXEL_PTR(rle_code * 2);
-
- while (rle_code--) {
- rgb[pixel_ptr++] = pi0;
- rgb[pixel_ptr++] = pi1;
- }
- } else {
- /* copy the same pixel directly to output 2 times */
- rle_code *= 2;
- CHECK_PIXEL_PTR(rle_code);
-
- while (rle_code--)
- rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
- }
- }
-}
-
-static inline void qtrle_decode_2n4bpp(QtrleContext *s, int row_ptr,
- int lines_to_change, int bpp)
-{
- int rle_code, i;
- int pixel_ptr;
- int row_inc = s->frame.linesize[0];
- unsigned char pi[16]; /* 16 palette indices */
- unsigned char *rgb = s->frame.data[0];
- int pixel_limit = s->frame.linesize[0] * s->avctx->height;
- int num_pixels = (bpp == 4) ? 8 : 16;
-
- while (lines_to_change--) {
- pixel_ptr = row_ptr + (num_pixels * (bytestream2_get_byte(&s->g) - 1));
- CHECK_PIXEL_PTR(0);
-
- while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
- if (rle_code == 0) {
- /* there's another skip code in the stream */
- pixel_ptr += (num_pixels * (bytestream2_get_byte(&s->g) - 1));
- CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
- } else if (rle_code < 0) {
- /* decode the run length code */
- rle_code = -rle_code;
- /* get the next 4 bytes from the stream, treat them as palette
- * indexes, and output them rle_code times */
- for (i = num_pixels-1; i >= 0; i--) {
- pi[num_pixels-1-i] = (bytestream2_peek_byte(&s->g) >> ((i*bpp) & 0x07)) & ((1<<bpp)-1);
- bytestream2_skip(&s->g, ((i & ((num_pixels>>2)-1)) == 0));
- }
- CHECK_PIXEL_PTR(rle_code * num_pixels);
- while (rle_code--) {
- for (i = 0; i < num_pixels; i++)
- rgb[pixel_ptr++] = pi[i];
- }
- } else {
- /* copy the same pixel directly to output 4 times */
- rle_code *= 4;
- CHECK_PIXEL_PTR(rle_code*(num_pixels>>2));
- while (rle_code--) {
- if(bpp == 4) {
- int x = bytestream2_get_byte(&s->g);
- rgb[pixel_ptr++] = (x >> 4) & 0x0f;
- rgb[pixel_ptr++] = x & 0x0f;
- } else {
- int x = bytestream2_get_byte(&s->g);
- rgb[pixel_ptr++] = (x >> 6) & 0x03;
- rgb[pixel_ptr++] = (x >> 4) & 0x03;
- rgb[pixel_ptr++] = (x >> 2) & 0x03;
- rgb[pixel_ptr++] = x & 0x03;
- }
- }
- }
- }
- row_ptr += row_inc;
- }
-}
-
-static void qtrle_decode_8bpp(QtrleContext *s, int row_ptr, int lines_to_change)
-{
- int rle_code;
- int pixel_ptr;
- int row_inc = s->frame.linesize[0];
- unsigned char pi1, pi2, pi3, pi4; /* 4 palette indexes */
- unsigned char *rgb = s->frame.data[0];
- int pixel_limit = s->frame.linesize[0] * s->avctx->height;
-
- while (lines_to_change--) {
- pixel_ptr = row_ptr + (4 * (bytestream2_get_byte(&s->g) - 1));
- CHECK_PIXEL_PTR(0);
-
- while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
- if (rle_code == 0) {
- /* there's another skip code in the stream */
- pixel_ptr += (4 * (bytestream2_get_byte(&s->g) - 1));
- CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
- } else if (rle_code < 0) {
- /* decode the run length code */
- rle_code = -rle_code;
- /* get the next 4 bytes from the stream, treat them as palette
- * indexes, and output them rle_code times */
- pi1 = bytestream2_get_byte(&s->g);
- pi2 = bytestream2_get_byte(&s->g);
- pi3 = bytestream2_get_byte(&s->g);
- pi4 = bytestream2_get_byte(&s->g);
-
- CHECK_PIXEL_PTR(rle_code * 4);
-
- while (rle_code--) {
- rgb[pixel_ptr++] = pi1;
- rgb[pixel_ptr++] = pi2;
- rgb[pixel_ptr++] = pi3;
- rgb[pixel_ptr++] = pi4;
- }
- } else {
- /* copy the same pixel directly to output 4 times */
- rle_code *= 4;
- CHECK_PIXEL_PTR(rle_code);
-
- while (rle_code--) {
- rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
- }
- }
- }
- row_ptr += row_inc;
- }
-}
-
-static void qtrle_decode_16bpp(QtrleContext *s, int row_ptr, int lines_to_change)
-{
- int rle_code;
- int pixel_ptr;
- int row_inc = s->frame.linesize[0];
- unsigned short rgb16;
- unsigned char *rgb = s->frame.data[0];
- int pixel_limit = s->frame.linesize[0] * s->avctx->height;
-
- while (lines_to_change--) {
- pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 2;
- CHECK_PIXEL_PTR(0);
-
- while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
- if (rle_code == 0) {
- /* there's another skip code in the stream */
- pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 2;
- CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
- } else if (rle_code < 0) {
- /* decode the run length code */
- rle_code = -rle_code;
- rgb16 = bytestream2_get_be16(&s->g);
-
- CHECK_PIXEL_PTR(rle_code * 2);
-
- while (rle_code--) {
- *(unsigned short *)(&rgb[pixel_ptr]) = rgb16;
- pixel_ptr += 2;
- }
- } else {
- CHECK_PIXEL_PTR(rle_code * 2);
-
- /* copy pixels directly to output */
- while (rle_code--) {
- rgb16 = bytestream2_get_be16(&s->g);
- *(unsigned short *)(&rgb[pixel_ptr]) = rgb16;
- pixel_ptr += 2;
- }
- }
- }
- row_ptr += row_inc;
- }
-}
-
-static void qtrle_decode_24bpp(QtrleContext *s, int row_ptr, int lines_to_change)
-{
- int rle_code;
- int pixel_ptr;
- int row_inc = s->frame.linesize[0];
- unsigned char r, g, b;
- unsigned char *rgb = s->frame.data[0];
- int pixel_limit = s->frame.linesize[0] * s->avctx->height;
-
- while (lines_to_change--) {
- pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 3;
- CHECK_PIXEL_PTR(0);
-
- while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
- if (rle_code == 0) {
- /* there's another skip code in the stream */
- pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 3;
- CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
- } else if (rle_code < 0) {
- /* decode the run length code */
- rle_code = -rle_code;
- r = bytestream2_get_byte(&s->g);
- g = bytestream2_get_byte(&s->g);
- b = bytestream2_get_byte(&s->g);
-
- CHECK_PIXEL_PTR(rle_code * 3);
-
- while (rle_code--) {
- rgb[pixel_ptr++] = r;
- rgb[pixel_ptr++] = g;
- rgb[pixel_ptr++] = b;
- }
- } else {
- CHECK_PIXEL_PTR(rle_code * 3);
-
- /* copy pixels directly to output */
- while (rle_code--) {
- rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
- rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
- rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
- }
- }
- }
- row_ptr += row_inc;
- }
-}
-
-static void qtrle_decode_32bpp(QtrleContext *s, int row_ptr, int lines_to_change)
-{
- int rle_code;
- int pixel_ptr;
- int row_inc = s->frame.linesize[0];
- unsigned int argb;
- unsigned char *rgb = s->frame.data[0];
- int pixel_limit = s->frame.linesize[0] * s->avctx->height;
-
- while (lines_to_change--) {
- pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 4;
- CHECK_PIXEL_PTR(0);
-
- while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
- if (rle_code == 0) {
- /* there's another skip code in the stream */
- pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 4;
- CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
- } else if (rle_code < 0) {
- /* decode the run length code */
- rle_code = -rle_code;
- argb = bytestream2_get_be32(&s->g);
-
- CHECK_PIXEL_PTR(rle_code * 4);
-
- while (rle_code--) {
- AV_WN32A(rgb + pixel_ptr, argb);
- pixel_ptr += 4;
- }
- } else {
- CHECK_PIXEL_PTR(rle_code * 4);
-
- /* copy pixels directly to output */
- while (rle_code--) {
- argb = bytestream2_get_be32(&s->g);
- AV_WN32A(rgb + pixel_ptr, argb);
- pixel_ptr += 4;
- }
- }
- }
- row_ptr += row_inc;
- }
-}
-
-static av_cold int qtrle_decode_init(AVCodecContext *avctx)
-{
- QtrleContext *s = avctx->priv_data;
-
- s->avctx = avctx;
- switch (avctx->bits_per_coded_sample) {
- case 1:
- case 33:
- avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
- break;
-
- case 2:
- case 4:
- case 8:
- case 34:
- case 36:
- case 40:
- avctx->pix_fmt = AV_PIX_FMT_PAL8;
- break;
-
- case 16:
- avctx->pix_fmt = AV_PIX_FMT_RGB555;
- break;
-
- case 24:
- avctx->pix_fmt = AV_PIX_FMT_RGB24;
- break;
-
- case 32:
- avctx->pix_fmt = AV_PIX_FMT_RGB32;
- break;
-
- default:
- av_log (avctx, AV_LOG_ERROR, "Unsupported colorspace: %d bits/sample?\n",
- avctx->bits_per_coded_sample);
- return AVERROR_INVALIDDATA;
- }
-
- avcodec_get_frame_defaults(&s->frame);
-
- return 0;
-}
-
-static int qtrle_decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame,
- AVPacket *avpkt)
-{
- QtrleContext *s = avctx->priv_data;
- int header, start_line;
- int height, row_ptr;
- int has_palette = 0;
- int ret;
-
- bytestream2_init(&s->g, avpkt->data, avpkt->size);
- if ((ret = ff_reget_buffer(avctx, &s->frame)) < 0)
- return ret;
-
- /* check if this frame is even supposed to change */
- if (avpkt->size < 8)
- goto done;
-
- /* start after the chunk size */
- bytestream2_seek(&s->g, 4, SEEK_SET);
-
- /* fetch the header */
- header = bytestream2_get_be16(&s->g);
-
- /* if a header is present, fetch additional decoding parameters */
- if (header & 0x0008) {
- if (avpkt->size < 14)
- goto done;
- start_line = bytestream2_get_be16(&s->g);
- bytestream2_skip(&s->g, 2);
- height = bytestream2_get_be16(&s->g);
- bytestream2_skip(&s->g, 2);
- if (height > s->avctx->height - start_line)
- goto done;
- } else {
- start_line = 0;
- height = s->avctx->height;
- }
- row_ptr = s->frame.linesize[0] * start_line;
-
- switch (avctx->bits_per_coded_sample) {
- case 1:
- case 33:
- qtrle_decode_1bpp(s, row_ptr, height);
- break;
-
- case 2:
- case 34:
- qtrle_decode_2n4bpp(s, row_ptr, height, 2);
- has_palette = 1;
- break;
-
- case 4:
- case 36:
- qtrle_decode_2n4bpp(s, row_ptr, height, 4);
- has_palette = 1;
- break;
-
- case 8:
- case 40:
- qtrle_decode_8bpp(s, row_ptr, height);
- has_palette = 1;
- break;
-
- case 16:
- qtrle_decode_16bpp(s, row_ptr, height);
- break;
-
- case 24:
- qtrle_decode_24bpp(s, row_ptr, height);
- break;
-
- case 32:
- qtrle_decode_32bpp(s, row_ptr, height);
- break;
-
- default:
- av_log (s->avctx, AV_LOG_ERROR, "Unsupported colorspace: %d bits/sample?\n",
- avctx->bits_per_coded_sample);
- break;
- }
-
- if(has_palette) {
- const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
-
- if (pal) {
- s->frame.palette_has_changed = 1;
- memcpy(s->pal, pal, AVPALETTE_SIZE);
- }
-
- /* make the palette available on the way out */
- memcpy(s->frame.data[1], s->pal, AVPALETTE_SIZE);
- }
-
-done:
- if ((ret = av_frame_ref(data, &s->frame)) < 0)
- return ret;
- *got_frame = 1;
-
- /* always report that the buffer was completely consumed */
- return avpkt->size;
-}
-
-static av_cold int qtrle_decode_end(AVCodecContext *avctx)
-{
- QtrleContext *s = avctx->priv_data;
-
- av_frame_unref(&s->frame);
-
- return 0;
-}
-
-AVCodec ff_qtrle_decoder = {
- .name = "qtrle",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_QTRLE,
- .priv_data_size = sizeof(QtrleContext),
- .init = qtrle_decode_init,
- .close = qtrle_decode_end,
- .decode = qtrle_decode_frame,
- .capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("QuickTime Animation (RLE) video"),
-};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 22:25:11 +0000