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FFmpeg/libavcodec/zerocodec.c
Michael Niedermayer ee77140afa Merge commit 'b2bed9325dbd6be0da1d91ffed3f513c40274fd2'
* commit 'b2bed9325dbd6be0da1d91ffed3f513c40274fd2':
  cosmetics: Group .name and .long_name together in codec/format declarations

Conflicts:
	libavcodec/8svx.c
	libavcodec/alac.c
	libavcodec/cljr.c
	libavcodec/dnxhddec.c
	libavcodec/dnxhdenc.c
	libavcodec/dpxenc.c
	libavcodec/dvdec.c
	libavcodec/dvdsubdec.c
	libavcodec/dvdsubenc.c
	libavcodec/ffv1dec.c
	libavcodec/flacdec.c
	libavcodec/flvdec.c
	libavcodec/fraps.c
	libavcodec/frwu.c
	libavcodec/g726.c
	libavcodec/gif.c
	libavcodec/gifdec.c
	libavcodec/h261dec.c
	libavcodec/h263dec.c
	libavcodec/iff.c
	libavcodec/imc.c
	libavcodec/libopencore-amr.c
	libavcodec/libopenjpegdec.c
	libavcodec/libopenjpegenc.c
	libavcodec/libspeexenc.c
	libavcodec/libvo-amrwbenc.c
	libavcodec/libvorbisenc.c
	libavcodec/libvpxenc.c
	libavcodec/libx264.c
	libavcodec/libxavs.c
	libavcodec/libxvid.c
	libavcodec/ljpegenc.c
	libavcodec/mjpegbdec.c
	libavcodec/mjpegdec.c
	libavcodec/mpeg12dec.c
	libavcodec/mpeg4videodec.c
	libavcodec/msmpeg4dec.c
	libavcodec/pgssubdec.c
	libavcodec/pngdec.c
	libavcodec/pngenc.c
	libavcodec/proresdec_lgpl.c
	libavcodec/proresenc_kostya.c
	libavcodec/ra144enc.c
	libavcodec/rawdec.c
	libavcodec/rv10.c
	libavcodec/sp5xdec.c
	libavcodec/takdec.c
	libavcodec/tta.c
	libavcodec/v210dec.c
	libavcodec/vp6.c
	libavcodec/wavpack.c
	libavcodec/xbmenc.c
	libavcodec/yop.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2013-10-04 12:34:23 +02:00

147 lines
4.2 KiB
C

/*
* ZeroCodec Decoder
*
* Copyright (c) 2012, Derek Buitenhuis
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <zlib.h>
#include "avcodec.h"
#include "internal.h"
#include "libavutil/common.h"
typedef struct {
AVFrame previous_frame;
z_stream zstream;
} ZeroCodecContext;
static int zerocodec_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
ZeroCodecContext *zc = avctx->priv_data;
AVFrame *pic = data;
AVFrame *prev_pic = &zc->previous_frame;
z_stream *zstream = &zc->zstream;
uint8_t *prev = prev_pic->data[0];
uint8_t *dst;
int i, j, zret, ret;
if (avpkt->flags & AV_PKT_FLAG_KEY) {
pic->key_frame = 1;
pic->pict_type = AV_PICTURE_TYPE_I;
} else {
if (!prev) {
av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");
return AVERROR_INVALIDDATA;
}
prev += (avctx->height - 1) * prev_pic->linesize[0];
pic->key_frame = 0;
pic->pict_type = AV_PICTURE_TYPE_P;
}
zret = inflateReset(zstream);
if (zret != Z_OK) {
av_log(avctx, AV_LOG_ERROR, "Could not reset inflate: %d.\n", zret);
return AVERROR_INVALIDDATA;
}
if ((ret = ff_get_buffer(avctx, pic, AV_GET_BUFFER_FLAG_REF)) < 0)
return ret;
zstream->next_in = avpkt->data;
zstream->avail_in = avpkt->size;
dst = pic->data[0] + (avctx->height - 1) * pic->linesize[0];
/**
* ZeroCodec has very simple interframe compression. If a value
* is the same as the previous frame, set it to 0.
*/
for (i = 0; i < avctx->height; i++) {
zstream->next_out = dst;
zstream->avail_out = avctx->width << 1;
zret = inflate(zstream, Z_SYNC_FLUSH);
if (zret != Z_OK && zret != Z_STREAM_END) {
av_log(avctx, AV_LOG_ERROR,
"Inflate failed with return code: %d.\n", zret);
return AVERROR_INVALIDDATA;
}
if (!(avpkt->flags & AV_PKT_FLAG_KEY))
for (j = 0; j < avctx->width << 1; j++)
dst[j] += prev[j] & -!dst[j];
prev -= prev_pic->linesize[0];
dst -= pic->linesize[0];
}
av_frame_unref(&zc->previous_frame);
if ((ret = av_frame_ref(&zc->previous_frame, pic)) < 0)
return ret;
*got_frame = 1;
return avpkt->size;
}
static av_cold int zerocodec_decode_close(AVCodecContext *avctx)
{
ZeroCodecContext *zc = avctx->priv_data;
av_frame_unref(&zc->previous_frame);
inflateEnd(&zc->zstream);
return 0;
}
static av_cold int zerocodec_decode_init(AVCodecContext *avctx)
{
ZeroCodecContext *zc = avctx->priv_data;
z_stream *zstream = &zc->zstream;
int zret;
avctx->pix_fmt = AV_PIX_FMT_UYVY422;
avctx->bits_per_raw_sample = 8;
zstream->zalloc = Z_NULL;
zstream->zfree = Z_NULL;
zstream->opaque = Z_NULL;
zret = inflateInit(zstream);
if (zret != Z_OK) {
av_log(avctx, AV_LOG_ERROR, "Could not initialize inflate: %d.\n", zret);
return AVERROR(ENOMEM);
}
return 0;
}
AVCodec ff_zerocodec_decoder = {
.type = AVMEDIA_TYPE_VIDEO,
.name = "zerocodec",
.long_name = NULL_IF_CONFIG_SMALL("ZeroCodec Lossless Video"),
.id = AV_CODEC_ID_ZEROCODEC,
.priv_data_size = sizeof(ZeroCodecContext),
.init = zerocodec_decode_init,
.decode = zerocodec_decode_frame,
.close = zerocodec_decode_close,
.capabilities = CODEC_CAP_DR1,
};