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Diffstat (limited to 'contrib/ffmpeg/libavcodec/lcldec.c')
-rw-r--r--contrib/ffmpeg/libavcodec/lcldec.c715
1 files changed, 0 insertions, 715 deletions
diff --git a/contrib/ffmpeg/libavcodec/lcldec.c b/contrib/ffmpeg/libavcodec/lcldec.c
deleted file mode 100644
index 4abb0cd41..000000000
--- a/contrib/ffmpeg/libavcodec/lcldec.c
+++ /dev/null
@@ -1,715 +0,0 @@
-/*
- * LCL (LossLess Codec Library) Codec
- * Copyright (c) 2002-2004 Roberto Togni
- *
- * 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 lcl.c
- * LCL (LossLess Codec Library) Video Codec
- * Decoder for MSZH and ZLIB codecs
- * Experimental encoder for ZLIB RGB24
- *
- * Fourcc: MSZH, ZLIB
- *
- * Original Win32 dll:
- * Ver2.23 By Kenji Oshima 2000.09.20
- * avimszh.dll, avizlib.dll
- *
- * A description of the decoding algorithm can be found here:
- * http://www.pcisys.net/~melanson/codecs
- *
- * Supports: BGR24 (RGB 24bpp)
- *
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "avcodec.h"
-#include "bitstream.h"
-#include "lcl.h"
-
-#ifdef CONFIG_ZLIB
-#include <zlib.h>
-#endif
-
-/*
- * Decoder context
- */
-typedef struct LclDecContext {
- AVFrame pic;
-
- // Image type
- int imgtype;
- // Compression type
- int compression;
- // Flags
- int flags;
- // Decompressed data size
- unsigned int decomp_size;
- // Decompression buffer
- unsigned char* decomp_buf;
-#ifdef CONFIG_ZLIB
- z_stream zstream;
-#endif
-} LclDecContext;
-
-
-/*
- *
- * Helper functions
- *
- */
-static inline unsigned char fix (int pix14)
-{
- int tmp;
-
- tmp = (pix14 + 0x80000) >> 20;
- if (tmp < 0)
- return 0;
- if (tmp > 255)
- return 255;
- return tmp;
-}
-
-
-
-static inline unsigned char get_b (unsigned char yq, signed char bq)
-{
- return fix((yq << 20) + bq * 1858076);
-}
-
-
-
-static inline unsigned char get_g (unsigned char yq, signed char bq, signed char rq)
-{
- return fix((yq << 20) - bq * 360857 - rq * 748830);
-}
-
-
-
-static inline unsigned char get_r (unsigned char yq, signed char rq)
-{
- return fix((yq << 20) + rq * 1470103);
-}
-
-
-
-static unsigned int mszh_decomp(unsigned char * srcptr, int srclen, unsigned char * destptr, unsigned int destsize)
-{
- unsigned char *destptr_bak = destptr;
- unsigned char *destptr_end = destptr + destsize;
- unsigned char mask = 0;
- unsigned char maskbit = 0;
- unsigned int ofs, cnt;
-
- while ((srclen > 0) && (destptr < destptr_end)) {
- if (maskbit == 0) {
- mask = *(srcptr++);
- maskbit = 8;
- srclen--;
- continue;
- }
- if ((mask & (1 << (--maskbit))) == 0) {
- if (destptr + 4 > destptr_end)
- break;
- *(int*)destptr = *(int*)srcptr;
- srclen -= 4;
- destptr += 4;
- srcptr += 4;
- } else {
- ofs = *(srcptr++);
- cnt = *(srcptr++);
- ofs += cnt * 256;
- cnt = ((cnt >> 3) & 0x1f) + 1;
- ofs &= 0x7ff;
- srclen -= 2;
- cnt *= 4;
- if (destptr + cnt > destptr_end) {
- cnt = destptr_end - destptr;
- }
- for (; cnt > 0; cnt--) {
- *(destptr) = *(destptr - ofs);
- destptr++;
- }
- }
- }
-
- return (destptr - destptr_bak);
-}
-
-
-
-/*
- *
- * Decode a frame
- *
- */
-static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size)
-{
- LclDecContext * const c = avctx->priv_data;
- unsigned char *encoded = (unsigned char *)buf;
- unsigned int pixel_ptr;
- int row, col;
- unsigned char *outptr;
- unsigned int width = avctx->width; // Real image width
- unsigned int height = avctx->height; // Real image height
- unsigned int mszh_dlen;
- unsigned char yq, y1q, uq, vq;
- int uqvq;
- unsigned int mthread_inlen, mthread_outlen;
-#ifdef CONFIG_ZLIB
- int zret; // Zlib return code
-#endif
- unsigned int len = buf_size;
-
- if(c->pic.data[0])
- avctx->release_buffer(avctx, &c->pic);
-
- c->pic.reference = 0;
- c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
- if(avctx->get_buffer(avctx, &c->pic) < 0){
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
-
- outptr = c->pic.data[0]; // Output image pointer
-
- /* Decompress frame */
- switch (avctx->codec_id) {
- case CODEC_ID_MSZH:
- switch (c->compression) {
- case COMP_MSZH:
- if (c->flags & FLAG_MULTITHREAD) {
- mthread_inlen = *((unsigned int*)encoded);
- mthread_outlen = *((unsigned int*)(encoded+4));
- if (mthread_outlen > c->decomp_size) // this should not happen
- mthread_outlen = c->decomp_size;
- mszh_dlen = mszh_decomp(encoded + 8, mthread_inlen, c->decomp_buf, c->decomp_size);
- if (mthread_outlen != mszh_dlen) {
- av_log(avctx, AV_LOG_ERROR, "Mthread1 decoded size differs (%d != %d)\n",
- mthread_outlen, mszh_dlen);
- return -1;
- }
- mszh_dlen = mszh_decomp(encoded + 8 + mthread_inlen, len - mthread_inlen,
- c->decomp_buf + mthread_outlen, c->decomp_size - mthread_outlen);
- if (mthread_outlen != mszh_dlen) {
- av_log(avctx, AV_LOG_ERROR, "Mthread2 decoded size differs (%d != %d)\n",
- mthread_outlen, mszh_dlen);
- return -1;
- }
- encoded = c->decomp_buf;
- len = c->decomp_size;
- } else {
- mszh_dlen = mszh_decomp(encoded, len, c->decomp_buf, c->decomp_size);
- if (c->decomp_size != mszh_dlen) {
- av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %d)\n",
- c->decomp_size, mszh_dlen);
- return -1;
- }
- encoded = c->decomp_buf;
- len = mszh_dlen;
- }
- break;
- case COMP_MSZH_NOCOMP:
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "BUG! Unknown MSZH compression in frame decoder.\n");
- return -1;
- }
- break;
- case CODEC_ID_ZLIB:
-#ifdef CONFIG_ZLIB
- /* Using the original dll with normal compression (-1) and RGB format
- * gives a file with ZLIB fourcc, but frame is really uncompressed.
- * To be sure that's true check also frame size */
- if ((c->compression == COMP_ZLIB_NORMAL) && (c->imgtype == IMGTYPE_RGB24) &&
- (len == width * height * 3))
- break;
- zret = inflateReset(&(c->zstream));
- if (zret != Z_OK) {
- av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
- return -1;
- }
- if (c->flags & FLAG_MULTITHREAD) {
- mthread_inlen = *((unsigned int*)encoded);
- mthread_outlen = *((unsigned int*)(encoded+4));
- if (mthread_outlen > c->decomp_size)
- mthread_outlen = c->decomp_size;
- c->zstream.next_in = encoded + 8;
- c->zstream.avail_in = mthread_inlen;
- c->zstream.next_out = c->decomp_buf;
- c->zstream.avail_out = c->decomp_size;
- zret = inflate(&(c->zstream), Z_FINISH);
- if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
- av_log(avctx, AV_LOG_ERROR, "Mthread1 inflate error: %d\n", zret);
- return -1;
- }
- if (mthread_outlen != (unsigned int)(c->zstream.total_out)) {
- av_log(avctx, AV_LOG_ERROR, "Mthread1 decoded size differs (%u != %lu)\n",
- mthread_outlen, c->zstream.total_out);
- return -1;
- }
- zret = inflateReset(&(c->zstream));
- if (zret != Z_OK) {
- av_log(avctx, AV_LOG_ERROR, "Mthread2 inflate reset error: %d\n", zret);
- return -1;
- }
- c->zstream.next_in = encoded + 8 + mthread_inlen;
- c->zstream.avail_in = len - mthread_inlen;
- c->zstream.next_out = c->decomp_buf + mthread_outlen;
- c->zstream.avail_out = c->decomp_size - mthread_outlen;
- zret = inflate(&(c->zstream), Z_FINISH);
- if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
- av_log(avctx, AV_LOG_ERROR, "Mthread2 inflate error: %d\n", zret);
- return -1;
- }
- if (mthread_outlen != (unsigned int)(c->zstream.total_out)) {
- av_log(avctx, AV_LOG_ERROR, "Mthread2 decoded size differs (%d != %lu)\n",
- mthread_outlen, c->zstream.total_out);
- return -1;
- }
- } else {
- c->zstream.next_in = encoded;
- c->zstream.avail_in = len;
- c->zstream.next_out = c->decomp_buf;
- c->zstream.avail_out = c->decomp_size;
- zret = inflate(&(c->zstream), Z_FINISH);
- if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
- av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", zret);
- return -1;
- }
- if (c->decomp_size != (unsigned int)(c->zstream.total_out)) {
- av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %lu)\n",
- c->decomp_size, c->zstream.total_out);
- return -1;
- }
- }
- encoded = c->decomp_buf;
- len = c->decomp_size;
-#else
- av_log(avctx, AV_LOG_ERROR, "BUG! Zlib support not compiled in frame decoder.\n");
- return -1;
-#endif
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in frame decoder compression switch.\n");
- return -1;
- }
-
-
- /* Apply PNG filter */
- if ((avctx->codec_id == CODEC_ID_ZLIB) && (c->flags & FLAG_PNGFILTER)) {
- switch (c->imgtype) {
- case IMGTYPE_YUV111:
- case IMGTYPE_RGB24:
- for (row = 0; row < height; row++) {
- pixel_ptr = row * width * 3;
- yq = encoded[pixel_ptr++];
- uqvq = AV_RL16(encoded+pixel_ptr);
- pixel_ptr += 2;
- for (col = 1; col < width; col++) {
- encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
- uqvq -= AV_RL16(encoded+pixel_ptr+1);
- AV_WL16(encoded+pixel_ptr+1, uqvq);
- pixel_ptr += 3;
- }
- }
- break;
- case IMGTYPE_YUV422:
- for (row = 0; row < height; row++) {
- pixel_ptr = row * width * 2;
- yq = uq = vq =0;
- for (col = 0; col < width/4; col++) {
- encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
- encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
- encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2];
- encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3];
- encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
- encoded[pixel_ptr+5] = uq -= encoded[pixel_ptr+5];
- encoded[pixel_ptr+6] = vq -= encoded[pixel_ptr+6];
- encoded[pixel_ptr+7] = vq -= encoded[pixel_ptr+7];
- pixel_ptr += 8;
- }
- }
- break;
- case IMGTYPE_YUV411:
- for (row = 0; row < height; row++) {
- pixel_ptr = row * width / 2 * 3;
- yq = uq = vq =0;
- for (col = 0; col < width/4; col++) {
- encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
- encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
- encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2];
- encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3];
- encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
- encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5];
- pixel_ptr += 6;
- }
- }
- break;
- case IMGTYPE_YUV211:
- for (row = 0; row < height; row++) {
- pixel_ptr = row * width * 2;
- yq = uq = vq =0;
- for (col = 0; col < width/2; col++) {
- encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
- encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
- encoded[pixel_ptr+2] = uq -= encoded[pixel_ptr+2];
- encoded[pixel_ptr+3] = vq -= encoded[pixel_ptr+3];
- pixel_ptr += 4;
- }
- }
- break;
- case IMGTYPE_YUV420:
- for (row = 0; row < height/2; row++) {
- pixel_ptr = row * width * 3;
- yq = y1q = uq = vq =0;
- for (col = 0; col < width/2; col++) {
- encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
- encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
- encoded[pixel_ptr+2] = y1q -= encoded[pixel_ptr+2];
- encoded[pixel_ptr+3] = y1q -= encoded[pixel_ptr+3];
- encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
- encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5];
- pixel_ptr += 6;
- }
- }
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in pngfilter switch.\n");
- return -1;
- }
- }
-
- /* Convert colorspace */
- switch (c->imgtype) {
- case IMGTYPE_YUV111:
- for (row = height - 1; row >= 0; row--) {
- pixel_ptr = row * c->pic.linesize[0];
- for (col = 0; col < width; col++) {
- outptr[pixel_ptr++] = get_b(encoded[0], encoded[1]);
- outptr[pixel_ptr++] = get_g(encoded[0], encoded[1], encoded[2]);
- outptr[pixel_ptr++] = get_r(encoded[0], encoded[2]);
- encoded += 3;
- }
- }
- break;
- case IMGTYPE_YUV422:
- for (row = height - 1; row >= 0; row--) {
- pixel_ptr = row * c->pic.linesize[0];
- for (col = 0; col < width/4; col++) {
- outptr[pixel_ptr++] = get_b(encoded[0], encoded[4]);
- outptr[pixel_ptr++] = get_g(encoded[0], encoded[4], encoded[6]);
- outptr[pixel_ptr++] = get_r(encoded[0], encoded[6]);
- outptr[pixel_ptr++] = get_b(encoded[1], encoded[4]);
- outptr[pixel_ptr++] = get_g(encoded[1], encoded[4], encoded[6]);
- outptr[pixel_ptr++] = get_r(encoded[1], encoded[6]);
- outptr[pixel_ptr++] = get_b(encoded[2], encoded[5]);
- outptr[pixel_ptr++] = get_g(encoded[2], encoded[5], encoded[7]);
- outptr[pixel_ptr++] = get_r(encoded[2], encoded[7]);
- outptr[pixel_ptr++] = get_b(encoded[3], encoded[5]);
- outptr[pixel_ptr++] = get_g(encoded[3], encoded[5], encoded[7]);
- outptr[pixel_ptr++] = get_r(encoded[3], encoded[7]);
- encoded += 8;
- }
- }
- break;
- case IMGTYPE_RGB24:
- for (row = height - 1; row >= 0; row--) {
- pixel_ptr = row * c->pic.linesize[0];
- for (col = 0; col < width; col++) {
- outptr[pixel_ptr++] = encoded[0];
- outptr[pixel_ptr++] = encoded[1];
- outptr[pixel_ptr++] = encoded[2];
- encoded += 3;
- }
- }
- break;
- case IMGTYPE_YUV411:
- for (row = height - 1; row >= 0; row--) {
- pixel_ptr = row * c->pic.linesize[0];
- for (col = 0; col < width/4; col++) {
- outptr[pixel_ptr++] = get_b(encoded[0], encoded[4]);
- outptr[pixel_ptr++] = get_g(encoded[0], encoded[4], encoded[5]);
- outptr[pixel_ptr++] = get_r(encoded[0], encoded[5]);
- outptr[pixel_ptr++] = get_b(encoded[1], encoded[4]);
- outptr[pixel_ptr++] = get_g(encoded[1], encoded[4], encoded[5]);
- outptr[pixel_ptr++] = get_r(encoded[1], encoded[5]);
- outptr[pixel_ptr++] = get_b(encoded[2], encoded[4]);
- outptr[pixel_ptr++] = get_g(encoded[2], encoded[4], encoded[5]);
- outptr[pixel_ptr++] = get_r(encoded[2], encoded[5]);
- outptr[pixel_ptr++] = get_b(encoded[3], encoded[4]);
- outptr[pixel_ptr++] = get_g(encoded[3], encoded[4], encoded[5]);
- outptr[pixel_ptr++] = get_r(encoded[3], encoded[5]);
- encoded += 6;
- }
- }
- break;
- case IMGTYPE_YUV211:
- for (row = height - 1; row >= 0; row--) {
- pixel_ptr = row * c->pic.linesize[0];
- for (col = 0; col < width/2; col++) {
- outptr[pixel_ptr++] = get_b(encoded[0], encoded[2]);
- outptr[pixel_ptr++] = get_g(encoded[0], encoded[2], encoded[3]);
- outptr[pixel_ptr++] = get_r(encoded[0], encoded[3]);
- outptr[pixel_ptr++] = get_b(encoded[1], encoded[2]);
- outptr[pixel_ptr++] = get_g(encoded[1], encoded[2], encoded[3]);
- outptr[pixel_ptr++] = get_r(encoded[1], encoded[3]);
- encoded += 4;
- }
- }
- break;
- case IMGTYPE_YUV420:
- for (row = height / 2 - 1; row >= 0; row--) {
- pixel_ptr = 2 * row * c->pic.linesize[0];
- for (col = 0; col < width/2; col++) {
- outptr[pixel_ptr] = get_b(encoded[0], encoded[4]);
- outptr[pixel_ptr+1] = get_g(encoded[0], encoded[4], encoded[5]);
- outptr[pixel_ptr+2] = get_r(encoded[0], encoded[5]);
- outptr[pixel_ptr+3] = get_b(encoded[1], encoded[4]);
- outptr[pixel_ptr+4] = get_g(encoded[1], encoded[4], encoded[5]);
- outptr[pixel_ptr+5] = get_r(encoded[1], encoded[5]);
- outptr[pixel_ptr-c->pic.linesize[0]] = get_b(encoded[2], encoded[4]);
- outptr[pixel_ptr-c->pic.linesize[0]+1] = get_g(encoded[2], encoded[4], encoded[5]);
- outptr[pixel_ptr-c->pic.linesize[0]+2] = get_r(encoded[2], encoded[5]);
- outptr[pixel_ptr-c->pic.linesize[0]+3] = get_b(encoded[3], encoded[4]);
- outptr[pixel_ptr-c->pic.linesize[0]+4] = get_g(encoded[3], encoded[4], encoded[5]);
- outptr[pixel_ptr-c->pic.linesize[0]+5] = get_r(encoded[3], encoded[5]);
- pixel_ptr += 6;
- encoded += 6;
- }
- }
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in image decoder.\n");
- return -1;
- }
-
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = c->pic;
-
- /* always report that the buffer was completely consumed */
- return buf_size;
-}
-
-/*
- *
- * Init lcl decoder
- *
- */
-static int decode_init(AVCodecContext *avctx)
-{
- LclDecContext * const c = avctx->priv_data;
- unsigned int basesize = avctx->width * avctx->height;
- unsigned int max_basesize = ((avctx->width + 3) & ~3) * ((avctx->height + 3) & ~3);
- unsigned int max_decomp_size;
- int zret; // Zlib return code
-
- c->pic.data[0] = NULL;
-
-#ifdef CONFIG_ZLIB
- // Needed if zlib unused or init aborted before inflateInit
- memset(&(c->zstream), 0, sizeof(z_stream));
-#endif
-
- if (avctx->extradata_size < 8) {
- av_log(avctx, AV_LOG_ERROR, "Extradata size too small.\n");
- return 1;
- }
-
- if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
- return 1;
- }
-
- /* Check codec type */
- if (((avctx->codec_id == CODEC_ID_MSZH) && (*((char *)avctx->extradata + 7) != CODEC_MSZH)) ||
- ((avctx->codec_id == CODEC_ID_ZLIB) && (*((char *)avctx->extradata + 7) != CODEC_ZLIB))) {
- av_log(avctx, AV_LOG_ERROR, "Codec id and codec type mismatch. This should not happen.\n");
- }
-
- /* Detect image type */
- switch (c->imgtype = *((char *)avctx->extradata + 4)) {
- case IMGTYPE_YUV111:
- c->decomp_size = basesize * 3;
- max_decomp_size = max_basesize * 3;
- av_log(avctx, AV_LOG_INFO, "Image type is YUV 1:1:1.\n");
- break;
- case IMGTYPE_YUV422:
- c->decomp_size = basesize * 2;
- max_decomp_size = max_basesize * 2;
- av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:2:2.\n");
- break;
- case IMGTYPE_RGB24:
- c->decomp_size = basesize * 3;
- max_decomp_size = max_basesize * 3;
- av_log(avctx, AV_LOG_INFO, "Image type is RGB 24.\n");
- break;
- case IMGTYPE_YUV411:
- c->decomp_size = basesize / 2 * 3;
- max_decomp_size = max_basesize / 2 * 3;
- av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:1:1.\n");
- break;
- case IMGTYPE_YUV211:
- c->decomp_size = basesize * 2;
- max_decomp_size = max_basesize * 2;
- av_log(avctx, AV_LOG_INFO, "Image type is YUV 2:1:1.\n");
- break;
- case IMGTYPE_YUV420:
- c->decomp_size = basesize / 2 * 3;
- max_decomp_size = max_basesize / 2 * 3;
- av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:2:0.\n");
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Unsupported image format %d.\n", c->imgtype);
- return 1;
- }
-
- /* Detect compression method */
- c->compression = *((char *)avctx->extradata + 5);
- switch (avctx->codec_id) {
- case CODEC_ID_MSZH:
- switch (c->compression) {
- case COMP_MSZH:
- av_log(avctx, AV_LOG_INFO, "Compression enabled.\n");
- break;
- case COMP_MSZH_NOCOMP:
- c->decomp_size = 0;
- av_log(avctx, AV_LOG_INFO, "No compression.\n");
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Unsupported compression format for MSZH (%d).\n", c->compression);
- return 1;
- }
- break;
- case CODEC_ID_ZLIB:
-#ifdef CONFIG_ZLIB
- switch (c->compression) {
- case COMP_ZLIB_HISPEED:
- av_log(avctx, AV_LOG_INFO, "High speed compression.\n");
- break;
- case COMP_ZLIB_HICOMP:
- av_log(avctx, AV_LOG_INFO, "High compression.\n");
- break;
- case COMP_ZLIB_NORMAL:
- av_log(avctx, AV_LOG_INFO, "Normal compression.\n");
- break;
- default:
- if ((c->compression < Z_NO_COMPRESSION) || (c->compression > Z_BEST_COMPRESSION)) {
- av_log(avctx, AV_LOG_ERROR, "Unsupported compression level for ZLIB: (%d).\n", c->compression);
- return 1;
- }
- av_log(avctx, AV_LOG_INFO, "Compression level for ZLIB: (%d).\n", c->compression);
- }
-#else
- av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
- return 1;
-#endif
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in compression switch.\n");
- return 1;
- }
-
- /* Allocate decompression buffer */
- if (c->decomp_size) {
- if ((c->decomp_buf = av_malloc(max_decomp_size)) == NULL) {
- av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
- return 1;
- }
- }
-
- /* Detect flags */
- c->flags = *((char *)avctx->extradata + 6);
- if (c->flags & FLAG_MULTITHREAD)
- av_log(avctx, AV_LOG_INFO, "Multithread encoder flag set.\n");
- if (c->flags & FLAG_NULLFRAME)
- av_log(avctx, AV_LOG_INFO, "Nullframe insertion flag set.\n");
- if ((avctx->codec_id == CODEC_ID_ZLIB) && (c->flags & FLAG_PNGFILTER))
- av_log(avctx, AV_LOG_INFO, "PNG filter flag set.\n");
- if (c->flags & FLAGMASK_UNUSED)
- av_log(avctx, AV_LOG_ERROR, "Unknown flag set (%d).\n", c->flags);
-
- /* If needed init zlib */
- if (avctx->codec_id == CODEC_ID_ZLIB) {
-#ifdef CONFIG_ZLIB
- c->zstream.zalloc = Z_NULL;
- c->zstream.zfree = Z_NULL;
- c->zstream.opaque = Z_NULL;
- zret = inflateInit(&(c->zstream));
- if (zret != Z_OK) {
- av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
- return 1;
- }
-#else
- av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
- return 1;
-#endif
- }
-
- avctx->pix_fmt = PIX_FMT_BGR24;
-
- return 0;
-}
-
-/*
- *
- * Uninit lcl decoder
- *
- */
-static int decode_end(AVCodecContext *avctx)
-{
- LclDecContext * const c = avctx->priv_data;
-
- if (c->pic.data[0])
- avctx->release_buffer(avctx, &c->pic);
-#ifdef CONFIG_ZLIB
- inflateEnd(&(c->zstream));
-#endif
-
- return 0;
-}
-
-#ifdef CONFIG_MSZH_DECODER
-AVCodec mszh_decoder = {
- "mszh",
- CODEC_TYPE_VIDEO,
- CODEC_ID_MSZH,
- sizeof(LclDecContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
-};
-#endif
-
-#ifdef CONFIG_ZLIB_DECODER
-AVCodec zlib_decoder = {
- "zlib",
- CODEC_TYPE_VIDEO,
- CODEC_ID_ZLIB,
- sizeof(LclDecContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
-};
-#endif
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-01 17:47:34 +0000