X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Ftscc.c;h=0b3c7f1a60e2a0305dce81e22cae27373473e88d;hb=3f47d316cda9037024ffbc76f789332e62b729bc;hp=2b717c1481d5688fb96b3722cb34fef5eeb49326;hpb=ba87f0801d77c21eb1e4891ca1f846500bbb0939;p=ffmpeg diff --git a/libavcodec/tscc.c b/libavcodec/tscc.c index 2b717c1481d..0b3c7f1a60e 100644 --- a/libavcodec/tscc.c +++ b/libavcodec/tscc.c @@ -2,20 +2,20 @@ * 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 */ @@ -39,14 +39,11 @@ #include #include "avcodec.h" +#include "internal.h" #include "msrledec.h" #include - -/* - * Decoder context - */ typedef struct TsccContext { AVCodecContext *avctx; @@ -58,80 +55,74 @@ typedef struct TsccContext { unsigned int decomp_size; // Decompression buffer unsigned char* decomp_buf; + GetByteContext gb; int height; z_stream zstream; + + uint32_t pal[256]; } CamtasiaContext; -/* - * - * Decode a frame - * - */ -static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt) +static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, + AVPacket *avpkt) { const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; CamtasiaContext * const c = avctx->priv_data; const unsigned char *encoded = buf; - unsigned char *outptr; int zret; // Zlib return code - int len = buf_size; + int ret, len = buf_size; 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, &c->pic)) < 0){ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); - return -1; + return ret; } - outptr = c->pic.data[0]; // Output image pointer - - zret = inflateReset(&(c->zstream)); + zret = inflateReset(&c->zstream); if (zret != Z_OK) { av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret); - return -1; + return AVERROR_UNKNOWN; } 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); + zret = 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; + return AVERROR_UNKNOWN; } - if(zret != Z_DATA_ERROR) - ff_msrle_decode(avctx, (AVPicture*)&c->pic, c->bpp, c->decomp_buf, c->decomp_size - c->zstream.avail_out); + if (zret != Z_DATA_ERROR) { + bytestream2_init(&c->gb, c->decomp_buf, + c->decomp_size - c->zstream.avail_out); + ff_msrle_decode(avctx, (AVPicture*)&c->pic, 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) { + 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) { c->pic.palette_has_changed = 1; - c->avctx->palctrl->palette_changed = 0; + memcpy(c->pal, pal, AVPALETTE_SIZE); } + memcpy(c->pic.data[1], c->pal, AVPALETTE_SIZE); } - *data_size = sizeof(AVFrame); + *got_frame = 1; *(AVFrame*)data = c->pic; /* always report that the buffer was completely consumed */ return buf_size; } - - -/* - * - * Init tscc decoder - * - */ static av_cold int decode_init(AVCodecContext *avctx) { CamtasiaContext * const c = avctx->priv_data; @@ -142,48 +133,41 @@ static av_cold int decode_init(AVCodecContext *avctx) c->height = avctx->height; // Needed if zlib unused or init aborted before inflateInit - memset(&(c->zstream), 0, sizeof(z_stream)); + memset(&c->zstream, 0, sizeof(z_stream)); switch(avctx->bits_per_coded_sample){ - case 8: avctx->pix_fmt = PIX_FMT_PAL8; break; - case 16: avctx->pix_fmt = PIX_FMT_RGB555; break; + 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_RGB32; break; + 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 -1; + return AVERROR_INVALIDDATA; } c->bpp = avctx->bits_per_coded_sample; - // buffer size for RLE 'best' case when 2-byte code preceeds each pixel and there may be padding after it too + // 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) { av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n"); - return 1; + return AVERROR(ENOMEM); } } 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; } return 0; } - - -/* - * - * Uninit tscc decoder - * - */ static av_cold int decode_end(AVCodecContext *avctx) { CamtasiaContext * const c = avctx->priv_data; @@ -192,21 +176,19 @@ static av_cold int decode_end(AVCodecContext *avctx) if (c->pic.data[0]) avctx->release_buffer(avctx, &c->pic); - inflateEnd(&(c->zstream)); + inflateEnd(&c->zstream); return 0; } -AVCodec tscc_decoder = { - "camtasia", - AVMEDIA_TYPE_VIDEO, - CODEC_ID_TSCC, - sizeof(CamtasiaContext), - decode_init, - NULL, - decode_end, - decode_frame, - CODEC_CAP_DR1, - .long_name = NULL_IF_CONFIG_SMALL("TechSmith Screen Capture Codec"), +AVCodec ff_tscc_decoder = { + .name = "camtasia", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_TSCC, + .priv_data_size = sizeof(CamtasiaContext), + .init = decode_init, + .close = decode_end, + .decode = decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("TechSmith Screen Capture Codec"), }; -