X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Ftscc.c;h=98b5f7161b80e5462a9fe7777910e58a27641e6c;hb=bb198c4997d5036f3bf91de51e44f807115677d0;hp=a24540f374a21b8cb98f00d9a4353c3659411b7d;hpb=b78e7197a81e193827cf2408fe25bc1f14843a72;p=ffmpeg diff --git a/libavcodec/tscc.c b/libavcodec/tscc.c index a24540f374a..98b5f7161b8 100644 --- a/libavcodec/tscc.c +++ b/libavcodec/tscc.c @@ -2,26 +2,25 @@ * TechSmith Camtasia decoder * Copyright (c) 2004 Konstantin Shishkov * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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, + * Libav 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 + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * */ /** - * @file tscc.c + * @file * TechSmith Camtasia decoder * * Fourcc: TSCC @@ -39,21 +38,15 @@ #include #include -#include "common.h" #include "avcodec.h" +#include "internal.h" +#include "msrledec.h" -#ifdef CONFIG_ZLIB #include -#endif - -/* - * Decoder context - */ typedef struct TsccContext { AVCodecContext *avctx; - AVFrame pic; // Bits per pixel int bpp; @@ -61,288 +54,131 @@ typedef struct TsccContext { unsigned int decomp_size; // Decompression buffer unsigned char* decomp_buf; + GetByteContext gb; int height; -#ifdef CONFIG_ZLIB z_stream zstream; -#endif -} CamtasiaContext; - -/* - * - * Decode RLE - almost identical to Windows BMP RLE8 - * and enhanced to bigger color depths - * - */ - -static int decode_rle(CamtasiaContext *c, unsigned int srcsize) -{ - unsigned char *src = c->decomp_buf; - unsigned char *output, *output_end; - int p1, p2, line=c->height, pos=0, i; - uint16_t pix16; - uint32_t pix32; - - output = c->pic.data[0] + (c->height - 1) * c->pic.linesize[0]; - output_end = c->pic.data[0] + (c->height) * c->pic.linesize[0]; - while(src < c->decomp_buf + srcsize) { - p1 = *src++; - if(p1 == 0) { //Escape code - p2 = *src++; - if(p2 == 0) { //End-of-line - output = c->pic.data[0] + (--line) * c->pic.linesize[0]; - if (line < 0) - return -1; - pos = 0; - continue; - } else if(p2 == 1) { //End-of-picture - return 0; - } else if(p2 == 2) { //Skip - p1 = *src++; - p2 = *src++; - line -= p2; - if (line < 0) - return -1; - pos += p1; - output = c->pic.data[0] + line * c->pic.linesize[0] + pos * (c->bpp / 8); - continue; - } - // Copy data - if (output + p2 * (c->bpp / 8) > output_end) { - src += p2 * (c->bpp / 8); - continue; - } - if ((c->bpp == 8) || (c->bpp == 24)) { - for(i = 0; i < p2 * (c->bpp / 8); i++) { - *output++ = *src++; - } - // RLE8 copy is actually padded - and runs are not! - if(c->bpp == 8 && (p2 & 1)) { - src++; - } - } else if (c->bpp == 16) { - for(i = 0; i < p2; i++) { - pix16 = LE_16(src); - src += 2; - *(uint16_t*)output = pix16; - output += 2; - } - } else if (c->bpp == 32) { - for(i = 0; i < p2; i++) { - pix32 = LE_32(src); - src += 4; - *(uint32_t*)output = pix32; - output += 4; - } - } - pos += p2; - } else { //Run of pixels - int pix[4]; //original pixel - switch(c->bpp){ - case 8: pix[0] = *src++; - break; - case 16: pix16 = LE_16(src); - src += 2; - *(uint16_t*)pix = pix16; - break; - case 24: pix[0] = *src++; - pix[1] = *src++; - pix[2] = *src++; - break; - case 32: pix32 = LE_32(src); - src += 4; - *(uint32_t*)pix = pix32; - break; - } - if (output + p1 * (c->bpp / 8) > output_end) - continue; - for(i = 0; i < p1; i++) { - switch(c->bpp){ - case 8: *output++ = pix[0]; - break; - case 16: *(uint16_t*)output = pix16; - output += 2; - break; - case 24: *output++ = pix[0]; - *output++ = pix[1]; - *output++ = pix[2]; - break; - case 32: *(uint32_t*)output = pix32; - output += 4; - break; - } - } - pos += p1; - } - } - av_log(c->avctx, AV_LOG_ERROR, "Camtasia warning: no End-of-picture code\n"); - return 1; -} + uint32_t pal[256]; +} CamtasiaContext; -/* - * - * Decode a frame - * - */ -static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size) +static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, + AVPacket *avpkt) { - CamtasiaContext * const c = (CamtasiaContext *)avctx->priv_data; - unsigned char *encoded = (unsigned char *)buf; - unsigned char *outptr; -#ifdef CONFIG_ZLIB - int zret; // Zlib return code -#endif - int len = buf_size; + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + CamtasiaContext * const c = avctx->priv_data; + AVFrame *frame = data; + int ret; - if(c->pic.data[0]) - avctx->release_buffer(avctx, &c->pic); - - c->pic.reference = 1; - c->pic.buffer_hints = FF_BUFFER_HINTS_VALID; - if(avctx->get_buffer(avctx, &c->pic) < 0){ + if ((ret = ff_get_buffer(avctx, frame, 0)) < 0){ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); - return -1; + return ret; } - outptr = c->pic.data[0]; // Output image pointer - -#ifdef CONFIG_ZLIB - zret = inflateReset(&(c->zstream)); - if (zret != Z_OK) { - av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret); - return -1; + ret = inflateReset(&c->zstream); + if (ret != Z_OK) { + av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", ret); + return AVERROR_UNKNOWN; } - c->zstream.next_in = encoded; - c->zstream.avail_in = len; + c->zstream.next_in = buf; + c->zstream.avail_in = buf_size; c->zstream.next_out = c->decomp_buf; c->zstream.avail_out = c->decomp_size; - zret = inflate(&(c->zstream), Z_FINISH); + ret = inflate(&c->zstream, Z_FINISH); // Z_DATA_ERROR means empty picture - if ((zret != Z_OK) && (zret != Z_STREAM_END) && (zret != Z_DATA_ERROR)) { - av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", zret); - return -1; + if ((ret != Z_OK) && (ret != Z_STREAM_END) && (ret != Z_DATA_ERROR)) { + av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", ret); + return AVERROR_UNKNOWN; } - if(zret != Z_DATA_ERROR) - decode_rle(c, c->zstream.avail_out); + if (ret != Z_DATA_ERROR) { + bytestream2_init(&c->gb, c->decomp_buf, + c->decomp_size - c->zstream.avail_out); + ff_msrle_decode(avctx, (AVPicture*)frame, c->bpp, &c->gb); + } /* make the palette available on the way out */ - if (c->avctx->pix_fmt == PIX_FMT_PAL8) { - memcpy(c->pic.data[1], c->avctx->palctrl->palette, AVPALETTE_SIZE); - if (c->avctx->palctrl->palette_changed) { - c->pic.palette_has_changed = 1; - c->avctx->palctrl->palette_changed = 0; + if (c->avctx->pix_fmt == AV_PIX_FMT_PAL8) { + const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL); + + if (pal) { + frame->palette_has_changed = 1; + memcpy(c->pal, pal, AVPALETTE_SIZE); } + memcpy(frame->data[1], c->pal, AVPALETTE_SIZE); } -#else - av_log(avctx, AV_LOG_ERROR, "BUG! Zlib support not compiled in frame decoder.\n"); - return -1; -#endif - - *data_size = sizeof(AVFrame); - *(AVFrame*)data = c->pic; + *got_frame = 1; /* always report that the buffer was completely consumed */ return buf_size; } - - -/* - * - * Init tscc decoder - * - */ -static int decode_init(AVCodecContext *avctx) +static av_cold int decode_init(AVCodecContext *avctx) { - CamtasiaContext * const c = (CamtasiaContext *)avctx->priv_data; + CamtasiaContext * const c = avctx->priv_data; int zret; // Zlib return code c->avctx = avctx; - avctx->has_b_frames = 0; - c->pic.data[0] = NULL; c->height = avctx->height; - if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) { - return 1; - } - -#ifdef CONFIG_ZLIB // Needed if zlib unused or init aborted before inflateInit - memset(&(c->zstream), 0, sizeof(z_stream)); -#else - av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n"); - return 1; -#endif - switch(avctx->bits_per_sample){ - case 8: avctx->pix_fmt = PIX_FMT_PAL8; break; - case 16: avctx->pix_fmt = PIX_FMT_RGB555; break; + memset(&c->zstream, 0, sizeof(z_stream)); + switch(avctx->bits_per_coded_sample){ + case 8: avctx->pix_fmt = AV_PIX_FMT_PAL8; break; + case 16: avctx->pix_fmt = AV_PIX_FMT_RGB555; break; case 24: - avctx->pix_fmt = PIX_FMT_BGR24; + avctx->pix_fmt = AV_PIX_FMT_BGR24; break; - case 32: avctx->pix_fmt = PIX_FMT_RGBA32; break; - default: av_log(avctx, AV_LOG_ERROR, "Camtasia error: unknown depth %i bpp\n", avctx->bits_per_sample); - return -1; + case 32: avctx->pix_fmt = AV_PIX_FMT_RGB32; break; + default: av_log(avctx, AV_LOG_ERROR, "Camtasia error: unknown depth %i bpp\n", avctx->bits_per_coded_sample); + return AVERROR_INVALIDDATA; } - c->bpp = avctx->bits_per_sample; - c->decomp_size = (avctx->width * c->bpp + (avctx->width + 254) / 255 + 2) * avctx->height + 2;//RLE in the 'best' case + c->bpp = avctx->bits_per_coded_sample; + // buffer size for RLE 'best' case when 2-byte code precedes each pixel and there may be padding after it too + c->decomp_size = (((avctx->width * c->bpp + 7) >> 3) + 3 * avctx->width + 2) * avctx->height + 2; /* Allocate decompression buffer */ if (c->decomp_size) { - if ((c->decomp_buf = av_malloc(c->decomp_size)) == NULL) { + if (!(c->decomp_buf = av_malloc(c->decomp_size))) { av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n"); - return 1; + return AVERROR(ENOMEM); } } -#ifdef CONFIG_ZLIB c->zstream.zalloc = Z_NULL; c->zstream.zfree = Z_NULL; c->zstream.opaque = Z_NULL; - zret = inflateInit(&(c->zstream)); + zret = inflateInit(&c->zstream); if (zret != Z_OK) { av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret); - return 1; + return AVERROR_UNKNOWN; } -#endif return 0; } - - -/* - * - * Uninit tscc decoder - * - */ -static int decode_end(AVCodecContext *avctx) +static av_cold int decode_end(AVCodecContext *avctx) { - CamtasiaContext * const c = (CamtasiaContext *)avctx->priv_data; + CamtasiaContext * const c = avctx->priv_data; av_freep(&c->decomp_buf); - if (c->pic.data[0]) - avctx->release_buffer(avctx, &c->pic); -#ifdef CONFIG_ZLIB - inflateEnd(&(c->zstream)); -#endif + inflateEnd(&c->zstream); return 0; } -AVCodec tscc_decoder = { - "camtasia", - CODEC_TYPE_VIDEO, - CODEC_ID_TSCC, - sizeof(CamtasiaContext), - decode_init, - NULL, - decode_end, - decode_frame, - CODEC_CAP_DR1, +AVCodec ff_tscc_decoder = { + .name = "camtasia", + .long_name = NULL_IF_CONFIG_SMALL("TechSmith Screen Capture Codec"), + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_TSCC, + .priv_data_size = sizeof(CamtasiaContext), + .init = decode_init, + .close = decode_end, + .decode = decode_frame, + .capabilities = AV_CODEC_CAP_DR1, }; -