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/*
* Raw Video Decoder |
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* Copyright (c) 2001 Fabrice Bellard |
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*
* 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
*/
/** |
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* @file |
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* Raw Video Decoder
*/
#include "avcodec.h"
#include "raw.h" |
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#include "libavutil/avassert.h" |
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#include "libavutil/buffer.h" |
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#include "libavutil/common.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/imgutils.h" |
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#include "libavutil/opt.h" |
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typedef struct RawVideoContext { |
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AVClass *av_class; |
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AVBufferRef *palette;
int frame_size; /* size of the frame in bytes */ |
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int flip; |
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int is_2_4_bpp; // 2 or 4 bpp raw in avi/mov
int is_yuv2; |
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int tff; |
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} RawVideoContext;
|
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static const AVOption options[]={ |
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{"top", "top field first", offsetof(RawVideoContext, tff), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_VIDEO_PARAM}, |
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{NULL}
}; |
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|
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static const AVClass rawdec_class = { |
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.class_name = "rawdec",
.option = options,
.version = LIBAVUTIL_VERSION_INT,
}; |
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|
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static const PixelFormatTag pix_fmt_bps_avi[] = { |
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{ AV_PIX_FMT_MONOWHITE, 1 },
{ AV_PIX_FMT_PAL8, 2 }, |
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{ AV_PIX_FMT_PAL8, 4 },
{ AV_PIX_FMT_PAL8, 8 }, |
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{ AV_PIX_FMT_RGB444LE, 12 },
{ AV_PIX_FMT_RGB555LE, 15 },
{ AV_PIX_FMT_RGB555LE, 16 }, |
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{ AV_PIX_FMT_BGR24, 24 }, |
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{ AV_PIX_FMT_BGRA, 32 }, |
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{ AV_PIX_FMT_NONE, 0 }, |
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};
|
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static const PixelFormatTag pix_fmt_bps_mov[] = { |
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{ AV_PIX_FMT_MONOWHITE, 1 },
{ AV_PIX_FMT_PAL8, 2 },
{ AV_PIX_FMT_PAL8, 4 },
{ AV_PIX_FMT_PAL8, 8 }, |
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// FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
// http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html |
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{ AV_PIX_FMT_RGB555BE, 16 },
{ AV_PIX_FMT_RGB24, 24 },
{ AV_PIX_FMT_ARGB, 32 },
{ AV_PIX_FMT_MONOWHITE,33 }, |
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{ AV_PIX_FMT_NONE, 0 }, |
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};
|
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enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags, |
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unsigned int fourcc) |
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{
while (tags->pix_fmt >= 0) {
if (tags->fourcc == fourcc)
return tags->pix_fmt;
tags++;
} |
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return AV_PIX_FMT_NONE; |
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}
|
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#if LIBAVCODEC_VERSION_MAJOR < 55
enum AVPixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
{
return avpriv_find_pix_fmt(tags, fourcc);
}
#endif
|
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static av_cold int raw_init_decoder(AVCodecContext *avctx) |
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{
RawVideoContext *context = avctx->priv_data; |
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const AVPixFmtDescriptor *desc; |
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|
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if ( avctx->codec_tag == MKTAG('r','a','w',' ')
|| avctx->codec_tag == MKTAG('N','O','1','6'))
avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_mov, |
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avctx->bits_per_coded_sample);
else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W')) |
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avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi, |
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avctx->bits_per_coded_sample); |
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else if (avctx->codec_tag) |
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avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag); |
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else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample) |
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avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi, |
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avctx->bits_per_coded_sample); |
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|
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desc = av_pix_fmt_desc_get(avctx->pix_fmt);
if (!desc) {
av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n"); |
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return AVERROR(EINVAL);
}
|
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if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL)) { |
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context->palette = av_buffer_alloc(AVPALETTE_SIZE);
if (!context->palette) |
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return AVERROR(ENOMEM); |
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if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) |
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avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt);
else
memset(context->palette->data, 0, AVPALETTE_SIZE); |
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} |
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|
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if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
avctx->pix_fmt == AV_PIX_FMT_PAL8 && |
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(!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) { |
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context->is_2_4_bpp = 1; |
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context->frame_size = avpicture_get_size(avctx->pix_fmt,
FFALIGN(avctx->width, 16),
avctx->height);
} else {
context->frame_size = avpicture_get_size(avctx->pix_fmt, avctx->width,
avctx->height);
} |
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|
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if ((avctx->extradata_size >= 9 &&
!memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) || |
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avctx->codec_tag == MKTAG('c','y','u','v') || |
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avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
avctx->codec_tag == MKTAG('W','R','A','W'))
context->flip = 1; |
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|
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if (avctx->codec_tag == AV_RL32("yuv2") &&
avctx->pix_fmt == AV_PIX_FMT_YUYV422)
context->is_yuv2 = 1; |
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|
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return 0;
}
|
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static void flip(AVCodecContext *avctx, AVPicture *picture)
{
picture->data[0] += picture->linesize[0] * (avctx->height - 1); |
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picture->linesize[0] *= -1; |
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}
|
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static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt) |
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{ |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt); |
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RawVideoContext *context = avctx->priv_data;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size; |
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int linesize_align = 4; |
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int res, len; |
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int need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2; |
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|
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AVFrame *frame = data;
AVPicture *picture = data; |
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|
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frame->pict_type = AV_PICTURE_TYPE_I;
frame->key_frame = 1; |
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frame->reordered_opaque = avctx->reordered_opaque; |
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frame->pkt_pts = avctx->pkt->pts; |
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av_frame_set_pkt_pos (frame, avctx->pkt->pos);
av_frame_set_pkt_duration(frame, avctx->pkt->duration); |
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|
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if (context->tff >= 0) { |
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frame->interlaced_frame = 1;
frame->top_field_first = context->tff;
}
|
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if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
return res; |
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|
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if (need_copy) |
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frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size)); |
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else
frame->buf[0] = av_buffer_ref(avpkt->buf);
if (!frame->buf[0])
return AVERROR(ENOMEM);
|
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//2bpp and 4bpp raw in avi and mov (yes this is ugly ...) |
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if (context->is_2_4_bpp) { |
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int i; |
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uint8_t *dst = frame->buf[0]->data;
buf_size = context->frame_size - AVPALETTE_SIZE; |
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if (avctx->bits_per_coded_sample == 4) { |
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for (i = 0; 2 * i + 1 < buf_size && i<avpkt->size; i++) { |
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dst[2 * i + 0] = buf[i] >> 4;
dst[2 * i + 1] = buf[i] & 15; |
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} |
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linesize_align = 8;
} else {
av_assert0(avctx->bits_per_coded_sample == 2); |
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for (i = 0; 4 * i + 3 < buf_size && i<avpkt->size; i++) { |
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dst[4 * i + 0] = buf[i] >> 6;
dst[4 * i + 1] = buf[i] >> 4 & 3;
dst[4 * i + 2] = buf[i] >> 2 & 3;
dst[4 * i + 3] = buf[i] & 3; |
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} |
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linesize_align = 16;
} |
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buf = dst; |
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} else if (need_copy) { |
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memcpy(frame->buf[0]->data, buf, buf_size); |
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buf = frame->buf[0]->data; |
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}
|
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if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
avctx->codec_tag == MKTAG('A', 'V', 'u', 'p')) |
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buf += buf_size - context->frame_size; |
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|
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len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0); |
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if (buf_size < len) { |
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av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len); |
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av_buffer_unref(&frame->buf[0]); |
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return AVERROR(EINVAL);
} |
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|
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if ((res = avpicture_fill(picture, buf, avctx->pix_fmt, |
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avctx->width, avctx->height)) < 0) {
av_buffer_unref(&frame->buf[0]); |
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return res; |
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} |
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|
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if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
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const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
NULL); |
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if (pal) { |
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av_buffer_unref(&context->palette);
context->palette = av_buffer_alloc(AVPALETTE_SIZE); |
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if (!context->palette) {
av_buffer_unref(&frame->buf[0]); |
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return AVERROR(ENOMEM); |
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} |
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memcpy(context->palette->data, pal, AVPALETTE_SIZE); |
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frame->palette_has_changed = 1;
} |
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} |
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|
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if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 || |
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avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
avctx->pix_fmt==AV_PIX_FMT_PAL8) && |
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FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size) |
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frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align); |
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|
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if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) { |
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int la0 = FFALIGN(frame->linesize[0], linesize_align); |
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frame->data[1] += (la0 - frame->linesize[0]) * avctx->height; |
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frame->linesize[0] = la0;
frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
}
|
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if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) || |
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(desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) { |
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frame->buf[1] = av_buffer_ref(context->palette); |
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if (!frame->buf[1]) {
av_buffer_unref(&frame->buf[0]); |
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return AVERROR(ENOMEM); |
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} |
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frame->data[1] = frame->buf[1]->data;
} |
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|
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if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
|
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if (context->flip) |
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flip(avctx, picture); |
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|
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if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
avctx->codec_tag == MKTAG('Y', 'V', 'U', '9')) |
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FFSWAP(uint8_t *, picture->data[1], picture->data[2]); |
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|
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if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) { |
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picture->data[1] = picture->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height; |
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picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
}
|
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if (avctx->codec_tag == AV_RL32("yuv2") &&
avctx->pix_fmt == AV_PIX_FMT_YUYV422) { |
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int x, y;
uint8_t *line = picture->data[0]; |
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for (y = 0; y < avctx->height; y++) {
for (x = 0; x < avctx->width; x++)
line[2 * x + 1] ^= 0x80; |
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line += picture->linesize[0];
}
} |
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if (avctx->codec_tag == AV_RL32("YVYU") &&
avctx->pix_fmt == AV_PIX_FMT_YUYV422) { |
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int x, y;
uint8_t *line = picture->data[0];
for(y = 0; y < avctx->height; y++) {
for(x = 0; x < avctx->width - 1; x += 2)
FFSWAP(uint8_t, line[2*x + 1], line[2*x + 3]);
line += picture->linesize[0];
}
} |
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|
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if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
frame->interlaced_frame = 1;
if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
frame->top_field_first = 1;
}
|
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*got_frame = 1; |
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return buf_size;
}
|
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static av_cold int raw_close_decoder(AVCodecContext *avctx) |
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{
RawVideoContext *context = avctx->priv_data;
|
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av_buffer_unref(&context->palette); |
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return 0;
}
|
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AVCodec ff_rawvideo_decoder = { |
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.name = "rawvideo", |
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.long_name = NULL_IF_CONFIG_SMALL("raw video"), |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_RAWVIDEO, |
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.priv_data_size = sizeof(RawVideoContext),
.init = raw_init_decoder,
.close = raw_close_decoder,
.decode = raw_decode, |
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.priv_class = &rawdec_class, |
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}; |