diff options
| author | Tim Redfern <tim@eclectronics.org> | 2013-09-05 17:55:35 +0100 |
|---|---|---|
| committer | Tim Redfern <tim@eclectronics.org> | 2013-09-05 17:55:35 +0100 |
| commit | 741fb4b9e135cfb161a749db88713229038577bb (patch) | |
| tree | 08bc9925659cbcac45162bacf31dc6336d4f60b4 /ffmpeg1/libavcodec/zerocodec.c | |
| parent | a2e1bf3495b7bfefdaedb8fc737e969ab06df079 (diff) | |
making act segmenter
Diffstat (limited to 'ffmpeg1/libavcodec/zerocodec.c')
| -rw-r--r-- | ffmpeg1/libavcodec/zerocodec.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/ffmpeg1/libavcodec/zerocodec.c b/ffmpeg1/libavcodec/zerocodec.c deleted file mode 100644 index 4a23b67..0000000 --- a/ffmpeg1/libavcodec/zerocodec.c +++ /dev/null @@ -1,146 +0,0 @@ -/* - * 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", - .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, - .long_name = NULL_IF_CONFIG_SMALL("ZeroCodec Lossless Video"), -}; |
