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https://github.com/FFmpeg/FFmpeg.git
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790f793844
There are lots of files that don't need it: The number of object files that actually need it went down from 2011 to 884 here. Keep it for external users in order to not cause breakages. Also improve the other headers a bit while just at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/*
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* Sunplus JPEG decoder (SP5X)
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* Copyright (c) 2003 Alex Beregszaszi
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Sunplus JPEG decoder (SP5X).
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*/
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#include "config_components.h"
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#include "libavutil/mem.h"
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#include "avcodec.h"
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#include "codec_internal.h"
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#include "mjpegdec.h"
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#include "sp5x.h"
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static int sp5x_decode_frame(AVCodecContext *avctx,
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AVFrame *frame, int *got_frame,
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AVPacket *avpkt)
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{
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const uint8_t *buf = avpkt->data;
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int buf_size = avpkt->size;
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uint8_t *recoded;
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int i = 0, j = 0;
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int ret;
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if (!avctx->width || !avctx->height)
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return -1;
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recoded = av_mallocz(buf_size + 1024);
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if (!recoded)
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return -1;
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/* SOI */
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recoded[j++] = 0xFF;
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recoded[j++] = 0xD8;
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memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt));
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memcpy(recoded + j + 5, &sp5x_qscale_five_quant_table[0], 64);
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memcpy(recoded + j + 70, &sp5x_qscale_five_quant_table[1], 64);
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j += sizeof(sp5x_data_dqt);
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memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht));
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j += sizeof(sp5x_data_dht);
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memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));
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AV_WB16(recoded+j+5, avctx->coded_height);
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AV_WB16(recoded+j+7, avctx->coded_width);
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j += sizeof(sp5x_data_sof);
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memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos));
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j += sizeof(sp5x_data_sos);
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if(avctx->codec_id==AV_CODEC_ID_AMV)
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for (i = 2; i < buf_size-2 && j < buf_size+1024-2; i++)
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recoded[j++] = buf[i];
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else
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for (i = 14; i < buf_size && j < buf_size+1024-3; i++)
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{
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recoded[j++] = buf[i];
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if (buf[i] == 0xff)
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recoded[j++] = 0;
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}
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/* EOI */
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recoded[j++] = 0xFF;
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recoded[j++] = 0xD9;
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ret = ff_mjpeg_decode_frame_from_buf(avctx, frame, got_frame,
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avpkt, recoded, j);
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av_free(recoded);
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return ret < 0 ? ret : avpkt->size;
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}
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#if CONFIG_SP5X_DECODER
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const FFCodec ff_sp5x_decoder = {
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.p.name = "sp5x",
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CODEC_LONG_NAME("Sunplus JPEG (SP5X)"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_SP5X,
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.priv_data_size = sizeof(MJpegDecodeContext),
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.init = ff_mjpeg_decode_init,
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.close = ff_mjpeg_decode_end,
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FF_CODEC_DECODE_CB(sp5x_decode_frame),
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.p.capabilities = AV_CODEC_CAP_DR1,
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.p.max_lowres = 3,
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.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
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};
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#endif
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#if CONFIG_AMV_DECODER
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const FFCodec ff_amv_decoder = {
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.p.name = "amv",
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CODEC_LONG_NAME("AMV Video"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_AMV,
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.priv_data_size = sizeof(MJpegDecodeContext),
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.init = ff_mjpeg_decode_init,
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.close = ff_mjpeg_decode_end,
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FF_CODEC_DECODE_CB(sp5x_decode_frame),
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.p.max_lowres = 3,
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.p.capabilities = AV_CODEC_CAP_DR1,
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.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
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};
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#endif
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