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Diffstat (limited to 'ffmpeg/libavcodec/cpia.c')
-rw-r--r--ffmpeg/libavcodec/cpia.c233
1 files changed, 0 insertions, 233 deletions
diff --git a/ffmpeg/libavcodec/cpia.c b/ffmpeg/libavcodec/cpia.c
deleted file mode 100644
index 44226fb..0000000
--- a/ffmpeg/libavcodec/cpia.c
+++ /dev/null
@@ -1,233 +0,0 @@
-/*
- * CPiA video decoder.
- * Copyright (c) 2010 Hans de Goede <hdegoede@redhat.com>
- *
- * This decoder is based on the LGPL code available at
- * https://v4l4j.googlecode.com/svn/v4l4j/trunk/libvideo/libv4lconvert/cpia1.c
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg 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,
- * 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
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "avcodec.h"
-#include "get_bits.h"
-#include "internal.h"
-
-
-#define FRAME_HEADER_SIZE 64
-#define MAGIC_0 0x19 /**< First header byte */
-#define MAGIC_1 0x68 /**< Second header byte */
-#define SUBSAMPLE_420 0
-#define SUBSAMPLE_422 1
-#define YUVORDER_YUYV 0
-#define YUVORDER_UYVY 1
-#define NOT_COMPRESSED 0
-#define COMPRESSED 1
-#define NO_DECIMATION 0
-#define DECIMATION_ENAB 1
-#define EOL 0xfd /**< End Of Line marker */
-#define EOI 0xff /**< End Of Image marker */
-
-
-typedef struct {
- AVFrame *frame;
-} CpiaContext;
-
-
-static int cpia_decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame, AVPacket* avpkt)
-{
- CpiaContext* const cpia = avctx->priv_data;
- int i,j,ret;
-
- uint8_t* const header = avpkt->data;
- uint8_t* src;
- int src_size;
- uint16_t linelength;
- uint8_t skip;
-
- AVFrame *frame = cpia->frame;
- uint8_t *y, *u, *v, *y_end, *u_end, *v_end;
-
- // Check header
- if ( avpkt->size < FRAME_HEADER_SIZE
- || header[0] != MAGIC_0 || header[1] != MAGIC_1
- || (header[17] != SUBSAMPLE_420 && header[17] != SUBSAMPLE_422)
- || (header[18] != YUVORDER_YUYV && header[18] != YUVORDER_UYVY)
- || (header[28] != NOT_COMPRESSED && header[28] != COMPRESSED)
- || (header[29] != NO_DECIMATION && header[29] != DECIMATION_ENAB)
- ) {
- av_log(avctx, AV_LOG_ERROR, "Invalid header!\n");
- return AVERROR_INVALIDDATA;
- }
-
- // currently unsupported properties
- if (header[17] == SUBSAMPLE_422) {
- av_log(avctx, AV_LOG_ERROR, "Unsupported subsample!\n");
- return AVERROR_PATCHWELCOME;
- }
- if (header[18] == YUVORDER_UYVY) {
- av_log(avctx, AV_LOG_ERROR, "Unsupported YUV byte order!\n");
- return AVERROR_PATCHWELCOME;
- }
- if (header[29] == DECIMATION_ENAB) {
- av_log(avctx, AV_LOG_ERROR, "Decimation unsupported!\n");
- return AVERROR_PATCHWELCOME;
- }
-
- src = header + FRAME_HEADER_SIZE;
- src_size = avpkt->size - FRAME_HEADER_SIZE;
-
- if (header[28] == NOT_COMPRESSED) {
- frame->pict_type = AV_PICTURE_TYPE_I;
- frame->key_frame = 1;
- } else {
- frame->pict_type = AV_PICTURE_TYPE_P;
- frame->key_frame = 0;
- }
-
- // Get buffer filled with previous frame
- if ((ret = ff_reget_buffer(avctx, frame)) < 0)
- return ret;
-
-
- for ( i = 0;
- i < frame->height;
- i++, src += linelength, src_size -= linelength
- ) {
- // Read line length, two byte little endian
- linelength = AV_RL16(src);
- src += 2;
-
- if (src_size < linelength) {
- av_frame_set_decode_error_flags(frame, FF_DECODE_ERROR_INVALID_BITSTREAM);
- av_log(avctx, AV_LOG_WARNING, "Frame ended enexpectedly!\n");
- break;
- }
- if (src[linelength - 1] != EOL) {
- av_frame_set_decode_error_flags(frame, FF_DECODE_ERROR_INVALID_BITSTREAM);
- av_log(avctx, AV_LOG_WARNING, "Wrong line length %d or line not terminated properly (found 0x%02x)!\n", linelength, src[linelength - 1]);
- break;
- }
-
- /* Update the data pointers. Y data is on every line.
- * U and V data on every second line
- */
- y = &frame->data[0][i * frame->linesize[0]];
- u = &frame->data[1][(i >> 1) * frame->linesize[1]];
- v = &frame->data[2][(i >> 1) * frame->linesize[2]];
- y_end = y + frame->linesize[0] - 1;
- u_end = u + frame->linesize[1] - 1;
- v_end = v + frame->linesize[2] - 1;
-
- if ((i & 1) && header[17] == SUBSAMPLE_420) {
- /* We are on a odd line and 420 subsample is used.
- * On this line only Y values are specified, one per pixel.
- */
- for (j = 0; j < linelength - 1; j++) {
- if (y > y_end) {
- av_frame_set_decode_error_flags(frame, FF_DECODE_ERROR_INVALID_BITSTREAM);
- av_log(avctx, AV_LOG_WARNING, "Decoded data exceeded linesize!\n");
- break;
- }
- if ((src[j] & 1) && header[28] == COMPRESSED) {
- /* It seems that odd lines are always uncompressed, but
- * we do it according to specification anyways.
- */
- skip = src[j] >> 1;
- y += skip;
- } else {
- *(y++) = src[j];
- }
- }
- } else if (header[17] == SUBSAMPLE_420) {
- /* We are on an even line and 420 subsample is used.
- * On this line each pair of pixels is described by four bytes.
- */
- for (j = 0; j < linelength - 4; ) {
- if (y + 1 > y_end || u > u_end || v > v_end) {
- av_frame_set_decode_error_flags(frame, FF_DECODE_ERROR_INVALID_BITSTREAM);
- av_log(avctx, AV_LOG_WARNING, "Decoded data exceeded linesize!\n");
- break;
- }
- if ((src[j] & 1) && header[28] == COMPRESSED) {
- // Skip amount of pixels and move forward one byte
- skip = src[j] >> 1;
- y += skip;
- u += skip >> 1;
- v += skip >> 1;
- j++;
- } else {
- // Set image data as specified and move forward 4 bytes
- *(y++) = src[j];
- *(u++) = src[j+1];
- *(y++) = src[j+2];
- *(v++) = src[j+3];
- j += 4;
- }
- }
- }
- }
-
- *got_frame = 1;
- if ((ret = av_frame_ref(data, cpia->frame)) < 0)
- return ret;
-
- return avpkt->size;
-}
-
-static av_cold int cpia_decode_init(AVCodecContext *avctx)
-{
- CpiaContext *s = avctx->priv_data;
-
- // output pixel format
- avctx->pix_fmt = AV_PIX_FMT_YUV420P;
-
- /* The default timebase set by the v4l2 demuxer leads to probing which is buggy.
- * Set some reasonable time_base to skip this.
- */
- if (avctx->time_base.num == 1 && avctx->time_base.den == 1000000) {
- avctx->time_base.num = 1;
- avctx->time_base.den = 60;
- }
-
- s->frame = av_frame_alloc();
- if (!s->frame)
- return AVERROR(ENOMEM);
-
- return 0;
-}
-
-static av_cold int cpia_decode_end(AVCodecContext *avctx)
-{
- CpiaContext *s = avctx->priv_data;
-
- av_frame_free(&s->frame);
-
- return 0;
-}
-
-AVCodec ff_cpia_decoder = {
- .name = "cpia",
- .long_name = NULL_IF_CONFIG_SMALL("CPiA video format"),
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_CPIA,
- .priv_data_size = sizeof(CpiaContext),
- .init = cpia_decode_init,
- .close = cpia_decode_end,
- .decode = cpia_decode_frame,
- .capabilities = CODEC_CAP_DR1,
-};
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