diff options
| -rw-r--r-- | libavcodec/Makefile | 6 | ||||
| -rw-r--r-- | libavcodec/lcl.h | 49 | ||||
| -rw-r--r-- | libavcodec/lcldec.c | 719 | ||||
| -rw-r--r-- | libavcodec/lclenc.c | 231 |
4 files changed, 1002 insertions, 3 deletions
diff --git a/libavcodec/Makefile b/libavcodec/Makefile index 33c3c22672..62bcc03ce4 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -123,7 +123,7 @@ OBJS-$(CONFIG_MSMPEG4V3_DECODER) += msmpeg4.o msmpeg4data.o h263dec.o h263 OBJS-$(CONFIG_MSMPEG4V3_ENCODER) += msmpeg4.o msmpeg4data.o mpegvideo_enc.o motion_est.o ratecontrol.o h263.o OBJS-$(CONFIG_MSRLE_DECODER) += msrle.o OBJS-$(CONFIG_MSVIDEO1_DECODER) += msvideo1.o -OBJS-$(CONFIG_MSZH_DECODER) += lcl.o +OBJS-$(CONFIG_MSZH_DECODER) += lcldec.o OBJS-$(CONFIG_NUV_DECODER) += nuv.o rtjpeg.o OBJS-$(CONFIG_PAM_ENCODER) += pnmenc.o pnm.o OBJS-$(CONFIG_PBM_ENCODER) += pnmenc.o pnm.o @@ -209,8 +209,8 @@ OBJS-$(CONFIG_XAN_DPCM_DECODER) += dpcm.o OBJS-$(CONFIG_XAN_WC3_DECODER) += xan.o OBJS-$(CONFIG_XAN_WC4_DECODER) += xan.o OBJS-$(CONFIG_XL_DECODER) += xl.o -OBJS-$(CONFIG_ZLIB_DECODER) += lcl.o -OBJS-$(CONFIG_ZLIB_ENCODER) += lcl.o +OBJS-$(CONFIG_ZLIB_DECODER) += lcldec.o +OBJS-$(CONFIG_ZLIB_ENCODER) += lclenc.o OBJS-$(CONFIG_ZMBV_DECODER) += zmbv.o OBJS-$(CONFIG_ZMBV_ENCODER) += zmbvenc.o diff --git a/libavcodec/lcl.h b/libavcodec/lcl.h new file mode 100644 index 0000000000..b60c0e901a --- /dev/null +++ b/libavcodec/lcl.h @@ -0,0 +1,49 @@ +/* + * 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 + */ + +#ifndef AVCODEC_LCL_H +#define AVCODEC_LCL_H + +#define BMPTYPE_YUV 1 +#define BMPTYPE_RGB 2 + +#define IMGTYPE_YUV111 0 +#define IMGTYPE_YUV422 1 +#define IMGTYPE_RGB24 2 +#define IMGTYPE_YUV411 3 +#define IMGTYPE_YUV211 4 +#define IMGTYPE_YUV420 5 + +#define COMP_MSZH 0 +#define COMP_MSZH_NOCOMP 1 +#define COMP_ZLIB_HISPEED 1 +#define COMP_ZLIB_HICOMP 9 +#define COMP_ZLIB_NORMAL -1 + +#define FLAG_MULTITHREAD 1 +#define FLAG_NULLFRAME 2 +#define FLAG_PNGFILTER 4 +#define FLAGMASK_UNUSED 0xf8 + +#define CODEC_MSZH 1 +#define CODEC_ZLIB 3 + +#endif /* AVCODEC_LCL_H */ diff --git a/libavcodec/lcldec.c b/libavcodec/lcldec.c new file mode 100644 index 0000000000..7e144eb6b8 --- /dev/null +++ b/libavcodec/lcldec.c @@ -0,0 +1,719 @@ +/* + * 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 { + + AVCodecContext *avctx; + 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, 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->avctx = avctx; + + 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 diff --git a/libavcodec/lclenc.c b/libavcodec/lclenc.c new file mode 100644 index 0000000000..e8349052af --- /dev/null +++ b/libavcodec/lclenc.c @@ -0,0 +1,231 @@ +/* + * 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 LclEncContext { + + AVCodecContext *avctx; + AVFrame pic; + PutBitContext pb; + + // Image type + int imgtype; + // Compression type + int compression; + // Flags + int flags; + // Decompressed data size + unsigned int decomp_size; + // Maximum compressed data size + unsigned int max_comp_size; + // Compression buffer + unsigned char* comp_buf; +#ifdef CONFIG_ZLIB + z_stream zstream; +#endif +} LclEncContext; + +/* + * + * Encode a frame + * + */ +static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){ + LclEncContext *c = avctx->priv_data; + AVFrame *pict = data; + AVFrame * const p = &c->pic; + int i; + int zret; // Zlib return code + +#ifndef CONFIG_ZLIB + av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled in.\n"); + return -1; +#else + + init_put_bits(&c->pb, buf, buf_size); + + *p = *pict; + p->pict_type= FF_I_TYPE; + p->key_frame= 1; + + if(avctx->pix_fmt != PIX_FMT_BGR24){ + av_log(avctx, AV_LOG_ERROR, "Format not supported!\n"); + return -1; + } + + zret = deflateReset(&(c->zstream)); + if (zret != Z_OK) { + av_log(avctx, AV_LOG_ERROR, "Deflate reset error: %d\n", zret); + return -1; + } + c->zstream.next_out = c->comp_buf; + c->zstream.avail_out = c->max_comp_size; + + for(i = avctx->height - 1; i >= 0; i--) { + c->zstream.next_in = p->data[0]+p->linesize[0]*i; + c->zstream.avail_in = avctx->width*3; + zret = deflate(&(c->zstream), Z_NO_FLUSH); + if (zret != Z_OK) { + av_log(avctx, AV_LOG_ERROR, "Deflate error: %d\n", zret); + return -1; + } + } + zret = deflate(&(c->zstream), Z_FINISH); + if (zret != Z_STREAM_END) { + av_log(avctx, AV_LOG_ERROR, "Deflate error: %d\n", zret); + return -1; + } + + for (i = 0; i < c->zstream.total_out; i++) + put_bits(&c->pb, 8, c->comp_buf[i]); + flush_put_bits(&c->pb); + + return c->zstream.total_out; +#endif +} + +/* + * + * Init lcl encoder + * + */ +static int encode_init(AVCodecContext *avctx) +{ + LclEncContext *c = avctx->priv_data; + int zret; // Zlib return code + +#ifndef CONFIG_ZLIB + av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n"); + return 1; +#else + + c->avctx= avctx; + + assert(avctx->width && avctx->height); + + avctx->extradata= av_mallocz(8); + avctx->coded_frame= &c->pic; + + // Will be user settable someday + c->compression = 6; + c->flags = 0; + + switch(avctx->pix_fmt){ + case PIX_FMT_BGR24: + c->imgtype = IMGTYPE_RGB24; + c->decomp_size = avctx->width * avctx->height * 3; + avctx->bits_per_sample= 24; + break; + default: + av_log(avctx, AV_LOG_ERROR, "Format %d not supported\n", avctx->pix_fmt); + return -1; + } + + ((uint8_t*)avctx->extradata)[0]= 4; + ((uint8_t*)avctx->extradata)[1]= 0; + ((uint8_t*)avctx->extradata)[2]= 0; + ((uint8_t*)avctx->extradata)[3]= 0; + ((uint8_t*)avctx->extradata)[4]= c->imgtype; + ((uint8_t*)avctx->extradata)[5]= c->compression; + ((uint8_t*)avctx->extradata)[6]= c->flags; + ((uint8_t*)avctx->extradata)[7]= CODEC_ZLIB; + c->avctx->extradata_size= 8; + + c->zstream.zalloc = Z_NULL; + c->zstream.zfree = Z_NULL; + c->zstream.opaque = Z_NULL; + zret = deflateInit(&(c->zstream), c->compression); + if (zret != Z_OK) { + av_log(avctx, AV_LOG_ERROR, "Deflate init error: %d\n", zret); + return 1; + } + + /* Conservative upper bound taken from zlib v1.2.1 source */ + c->max_comp_size = c->decomp_size + ((c->decomp_size + 7) >> 3) + + ((c->decomp_size + 63) >> 6) + 11; + if ((c->comp_buf = av_malloc(c->max_comp_size)) == NULL) { + av_log(avctx, AV_LOG_ERROR, "Can't allocate compression buffer.\n"); + return 1; + } + + return 0; +#endif +} + +/* + * + * Uninit lcl encoder + * + */ +static int encode_end(AVCodecContext *avctx) +{ + LclEncContext *c = avctx->priv_data; + + av_freep(&avctx->extradata); + av_freep(&c->comp_buf); +#ifdef CONFIG_ZLIB + deflateEnd(&(c->zstream)); +#endif + + return 0; +} + +AVCodec zlib_encoder = { + "zlib", + CODEC_TYPE_VIDEO, + CODEC_ID_ZLIB, + sizeof(LclEncContext), + encode_init, + encode_frame, + encode_end, +}; |