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https://github.com/FFmpeg/FFmpeg.git
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Add MxPEG decoder
Signed-off-by: Anton Khirnov <anton@khirnov.net> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
anatoly
Michael Niedermayer
parent
dd1e5bfd5e
commit
75cf2602c7
@ -99,6 +99,7 @@ version 0.7_beta1:
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- AAC encoding via libvo-aacenc
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- AMR-WB encoding via libvo-amrwbenc
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- xWMA demuxer
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- Mobotix MxPEG decoder
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version 0.6:
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@ -446,6 +446,7 @@ following image formats are supported:
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@item Miro VideoXL @tab @tab X
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@tab fourcc: VIXL
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@item MJPEG (Motion JPEG) @tab X @tab X
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@item Mobotix MxPEG video @tab @tab X
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@item Motion Pixels video @tab @tab X
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@item MPEG-1 video @tab X @tab X
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@item MPEG-1/2 video XvMC (X-Video Motion Compensation) @tab @tab X
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@ -275,6 +275,7 @@ OBJS-$(CONFIG_MSMPEG4V3_ENCODER) += msmpeg4.o msmpeg4data.o h263dec.o \
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OBJS-$(CONFIG_MSRLE_DECODER) += msrle.o msrledec.o
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OBJS-$(CONFIG_MSVIDEO1_DECODER) += msvideo1.o
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OBJS-$(CONFIG_MSZH_DECODER) += lcldec.o
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OBJS-$(CONFIG_MXPEG_DECODER) += mxpegdec.o
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OBJS-$(CONFIG_NELLYMOSER_DECODER) += nellymoserdec.o nellymoser.o
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OBJS-$(CONFIG_NELLYMOSER_ENCODER) += nellymoserenc.o nellymoser.o
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OBJS-$(CONFIG_NUV_DECODER) += nuv.o rtjpeg.o
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@ -159,6 +159,7 @@ void avcodec_register_all(void)
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REGISTER_DECODER (MSRLE, msrle);
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REGISTER_DECODER (MSVIDEO1, msvideo1);
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REGISTER_DECODER (MSZH, mszh);
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REGISTER_DECODER (MXPEG, mxpeg);
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REGISTER_DECODER (NUV, nuv);
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REGISTER_ENCDEC (PAM, pam);
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REGISTER_ENCDEC (PBM, pbm);
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341
libavcodec/mxpegdec.c
Normal file
341
libavcodec/mxpegdec.c
Normal file
@ -0,0 +1,341 @@
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/*
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* MxPEG decoder
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* Copyright (c) 2011 Anatoly Nenashev
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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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* MxPEG decoder
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*/
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#include "mjpeg.h"
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#include "mjpegdec.h"
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typedef struct MXpegDecodeContext {
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MJpegDecodeContext jpg;
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AVFrame picture[2]; /* pictures array */
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int picture_index; /* index of current picture */
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int got_sof_data; /* true if SOF data successfully parsed */
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int got_mxm_bitmask; /* true if MXM bitmask available */
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uint8_t *mxm_bitmask; /* bitmask buffer */
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unsigned bitmask_size; /* size of bitmask */
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int has_complete_frame; /* true if has complete frame */
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uint8_t *completion_bitmask; /* completion bitmask of macroblocks */
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unsigned mb_width, mb_height; /* size of picture in MB's from MXM header */
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} MXpegDecodeContext;
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static av_cold int mxpeg_decode_init(AVCodecContext *avctx)
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{
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MXpegDecodeContext *s = avctx->priv_data;
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s->picture[0].reference = s->picture[1].reference = 3;
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s->jpg.picture_ptr = &s->picture[0];
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ff_mjpeg_decode_init(avctx);
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return 0;
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}
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static int mxpeg_decode_app(MXpegDecodeContext *s,
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const uint8_t *buf_ptr, int buf_size)
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{
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int len;
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if (buf_size < 2)
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return 0;
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len = AV_RB16(buf_ptr);
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skip_bits(&s->jpg.gb, 8*FFMIN(len,buf_size));
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return 0;
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}
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static int mxpeg_decode_mxm(MXpegDecodeContext *s,
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const uint8_t *buf_ptr, int buf_size)
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{
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unsigned bitmask_size, mb_count;
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int i;
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s->mb_width = AV_RL16(buf_ptr+4);
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s->mb_height = AV_RL16(buf_ptr+6);
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mb_count = s->mb_width * s->mb_height;
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bitmask_size = (mb_count + 7) >> 3;
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if (bitmask_size > buf_size - 12) {
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av_log(s->jpg.avctx, AV_LOG_ERROR,
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"MXM bitmask is not complete\n");
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return AVERROR(EINVAL);
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}
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if (s->bitmask_size != bitmask_size) {
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s->bitmask_size = 0;
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av_freep(&s->mxm_bitmask);
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s->mxm_bitmask = av_malloc(bitmask_size);
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if (!s->mxm_bitmask) {
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av_log(s->jpg.avctx, AV_LOG_ERROR,
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"MXM bitmask memory allocation error\n");
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return AVERROR(ENOMEM);
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}
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av_freep(&s->completion_bitmask);
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s->completion_bitmask = av_mallocz(bitmask_size);
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if (!s->completion_bitmask) {
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av_log(s->jpg.avctx, AV_LOG_ERROR,
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"Completion bitmask memory allocation error\n");
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return AVERROR(ENOMEM);
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}
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s->bitmask_size = bitmask_size;
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}
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memcpy(s->mxm_bitmask, buf_ptr + 12, bitmask_size);
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s->got_mxm_bitmask = 1;
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if (!s->has_complete_frame) {
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uint8_t completion_check = 0xFF;
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for (i = 0; i < bitmask_size; ++i) {
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s->completion_bitmask[i] |= s->mxm_bitmask[i];
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completion_check &= s->completion_bitmask[i];
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}
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s->has_complete_frame = !(completion_check ^ 0xFF);
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}
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return 0;
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}
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static int mxpeg_decode_com(MXpegDecodeContext *s,
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const uint8_t *buf_ptr, int buf_size)
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{
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int len, ret = 0;
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if (buf_size < 2)
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return 0;
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len = AV_RB16(buf_ptr);
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if (len > 14 && len <= buf_size && !strncmp(buf_ptr + 2, "MXM", 3)) {
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ret = mxpeg_decode_mxm(s, buf_ptr + 2, len - 2);
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}
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skip_bits(&s->jpg.gb, 8*FFMIN(len,buf_size));
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return ret;
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}
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static int mxpeg_check_dimensions(MXpegDecodeContext *s, MJpegDecodeContext *jpg,
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AVFrame *reference_ptr)
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{
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if ((jpg->width + 0x0F)>>4 != s->mb_width ||
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(jpg->height + 0x0F)>>4 != s->mb_height) {
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av_log(jpg->avctx, AV_LOG_ERROR,
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"Picture dimensions stored in SOF and MXM mismatch\n");
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return AVERROR(EINVAL);
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}
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if (reference_ptr->data[0]) {
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int i;
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for (i = 0; i < MAX_COMPONENTS; ++i) {
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if ( (!reference_ptr->data[i] ^ !jpg->picture_ptr->data[i]) ||
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reference_ptr->linesize[i] != jpg->picture_ptr->linesize[i]) {
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av_log(jpg->avctx, AV_LOG_ERROR,
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"Dimensions of current and reference picture mismatch\n");
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return AVERROR(EINVAL);
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}
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}
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}
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return 0;
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}
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static int mxpeg_decode_frame(AVCodecContext *avctx,
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void *data, int *data_size,
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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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MXpegDecodeContext *s = avctx->priv_data;
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MJpegDecodeContext *jpg = &s->jpg;
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const uint8_t *buf_end, *buf_ptr;
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const uint8_t *unescaped_buf_ptr;
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int unescaped_buf_size;
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int start_code;
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AVFrame *picture = data;
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int ret;
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buf_ptr = buf;
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buf_end = buf + buf_size;
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jpg->got_picture = 0;
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s->got_mxm_bitmask = 0;
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while (buf_ptr < buf_end) {
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start_code = ff_mjpeg_find_marker(jpg, &buf_ptr, buf_end,
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&unescaped_buf_ptr, &unescaped_buf_size);
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if (start_code < 0)
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goto the_end;
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{
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init_get_bits(&jpg->gb, unescaped_buf_ptr, unescaped_buf_size*8);
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if (start_code >= APP0 && start_code <= APP15) {
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mxpeg_decode_app(s, unescaped_buf_ptr, unescaped_buf_size);
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}
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switch (start_code) {
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case SOI:
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if (jpg->got_picture) //emulating EOI
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goto the_end;
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break;
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case EOI:
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goto the_end;
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case DQT:
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ret = ff_mjpeg_decode_dqt(jpg);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR,
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"quantization table decode error\n");
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return ret;
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}
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break;
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case DHT:
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ret = ff_mjpeg_decode_dht(jpg);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR,
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"huffman table decode error\n");
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return ret;
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}
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break;
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case COM:
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ret = mxpeg_decode_com(s, unescaped_buf_ptr,
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unescaped_buf_size);
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if (ret < 0)
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return ret;
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break;
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case SOF0:
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s->got_sof_data = 0;
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ret = ff_mjpeg_decode_sof(jpg);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR,
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"SOF data decode error\n");
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return ret;
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}
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if (jpg->interlaced) {
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av_log(avctx, AV_LOG_ERROR,
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"Interlaced mode not supported in MxPEG\n");
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return AVERROR(EINVAL);
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}
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s->got_sof_data = 1;
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break;
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case SOS:
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if (!s->got_sof_data) {
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av_log(avctx, AV_LOG_WARNING,
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"Can not process SOS without SOF data, skipping\n");
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break;
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}
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if (!jpg->got_picture) {
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if (jpg->first_picture) {
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av_log(avctx, AV_LOG_WARNING,
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"First picture has no SOF, skipping\n");
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break;
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}
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if (!s->got_mxm_bitmask){
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av_log(avctx, AV_LOG_WARNING,
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"Non-key frame has no MXM, skipping\n");
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break;
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}
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/* use stored SOF data to allocate current picture */
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if (jpg->picture_ptr->data[0])
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avctx->release_buffer(avctx, jpg->picture_ptr);
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if (avctx->get_buffer(avctx, jpg->picture_ptr) < 0) {
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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return AVERROR(ENOMEM);
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}
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jpg->picture_ptr->pict_type = FF_P_TYPE;
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jpg->picture_ptr->key_frame = 0;
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jpg->got_picture = 1;
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} else {
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jpg->picture_ptr->pict_type = FF_I_TYPE;
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jpg->picture_ptr->key_frame = 1;
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}
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if (s->got_mxm_bitmask) {
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AVFrame *reference_ptr = &s->picture[s->picture_index ^ 1];
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if (mxpeg_check_dimensions(s, jpg, reference_ptr) < 0)
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break;
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/* allocate dummy reference picture if needed */
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if (!reference_ptr->data[0] &&
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avctx->get_buffer(avctx, reference_ptr) < 0) {
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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return AVERROR(ENOMEM);
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}
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ff_mjpeg_decode_sos(jpg, s->mxm_bitmask, reference_ptr);
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} else {
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ff_mjpeg_decode_sos(jpg, NULL, NULL);
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}
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break;
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}
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buf_ptr += (get_bits_count(&jpg->gb)+7) >> 3;
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}
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}
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the_end:
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if (jpg->got_picture) {
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*data_size = sizeof(AVFrame);
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*picture = *jpg->picture_ptr;
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s->picture_index ^= 1;
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jpg->picture_ptr = &s->picture[s->picture_index];
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if (!s->has_complete_frame) {
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if (!s->got_mxm_bitmask)
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s->has_complete_frame = 1;
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else
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*data_size = 0;
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}
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}
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return buf_ptr - buf;
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}
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static av_cold int mxpeg_decode_end(AVCodecContext *avctx)
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{
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MXpegDecodeContext *s = avctx->priv_data;
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MJpegDecodeContext *jpg = &s->jpg;
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int i;
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jpg->picture_ptr = NULL;
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ff_mjpeg_decode_end(avctx);
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for (i = 0; i < 2; ++i) {
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if (s->picture[i].data[0])
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avctx->release_buffer(avctx, &s->picture[i]);
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}
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av_freep(&s->mxm_bitmask);
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av_freep(&s->completion_bitmask);
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return 0;
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}
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AVCodec ff_mxpeg_decoder = {
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.name = "mxpeg",
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.long_name = NULL_IF_CONFIG_SMALL("Mobotix MxPEG video"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = CODEC_ID_MXPEG,
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.priv_data_size = sizeof(MXpegDecodeContext),
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.init = mxpeg_decode_init,
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.close = mxpeg_decode_end,
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.decode = mxpeg_decode_frame,
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.capabilities = CODEC_CAP_DR1,
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.max_lowres = 3
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};
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