0,0 → 1,360 |
/* |
* Raw Video Decoder |
* Copyright (c) 2001 Fabrice Bellard |
* |
* 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 |
*/ |
|
/** |
* @file |
* Raw Video Decoder |
*/ |
|
#include "avcodec.h" |
#include "raw.h" |
#include "libavutil/avassert.h" |
#include "libavutil/buffer.h" |
#include "libavutil/common.h" |
#include "libavutil/intreadwrite.h" |
#include "libavutil/imgutils.h" |
#include "libavutil/opt.h" |
|
typedef struct RawVideoContext { |
AVClass *av_class; |
AVBufferRef *palette; |
int frame_size; /* size of the frame in bytes */ |
int flip; |
int is_2_4_bpp; // 2 or 4 bpp raw in avi/mov |
int is_yuv2; |
int tff; |
} RawVideoContext; |
|
static const AVOption options[]={ |
{"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}, |
{NULL} |
}; |
|
static const AVClass rawdec_class = { |
.class_name = "rawdec", |
.option = options, |
.version = LIBAVUTIL_VERSION_INT, |
}; |
|
static const PixelFormatTag pix_fmt_bps_avi[] = { |
{ AV_PIX_FMT_MONOWHITE, 1 }, |
{ AV_PIX_FMT_PAL8, 2 }, |
{ AV_PIX_FMT_PAL8, 4 }, |
{ AV_PIX_FMT_PAL8, 8 }, |
{ AV_PIX_FMT_RGB444LE, 12 }, |
{ AV_PIX_FMT_RGB555LE, 15 }, |
{ AV_PIX_FMT_RGB555LE, 16 }, |
{ AV_PIX_FMT_BGR24, 24 }, |
{ AV_PIX_FMT_BGRA, 32 }, |
{ AV_PIX_FMT_NONE, 0 }, |
}; |
|
static const PixelFormatTag pix_fmt_bps_mov[] = { |
{ AV_PIX_FMT_MONOWHITE, 1 }, |
{ AV_PIX_FMT_PAL8, 2 }, |
{ AV_PIX_FMT_PAL8, 4 }, |
{ AV_PIX_FMT_PAL8, 8 }, |
// FIXME swscale does not support 16 bit in .mov, sample 16bit.mov |
// http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html |
{ AV_PIX_FMT_RGB555BE, 16 }, |
{ AV_PIX_FMT_RGB24, 24 }, |
{ AV_PIX_FMT_ARGB, 32 }, |
{ AV_PIX_FMT_MONOWHITE,33 }, |
{ AV_PIX_FMT_NONE, 0 }, |
}; |
|
enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags, |
unsigned int fourcc) |
{ |
while (tags->pix_fmt >= 0) { |
if (tags->fourcc == fourcc) |
return tags->pix_fmt; |
tags++; |
} |
return AV_PIX_FMT_NONE; |
} |
|
#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 |
|
static av_cold int raw_init_decoder(AVCodecContext *avctx) |
{ |
RawVideoContext *context = avctx->priv_data; |
const AVPixFmtDescriptor *desc; |
|
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, |
avctx->bits_per_coded_sample); |
else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W')) |
avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi, |
avctx->bits_per_coded_sample); |
else if (avctx->codec_tag) |
avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag); |
else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample) |
avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi, |
avctx->bits_per_coded_sample); |
|
desc = av_pix_fmt_desc_get(avctx->pix_fmt); |
if (!desc) { |
av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n"); |
return AVERROR(EINVAL); |
} |
|
if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL)) { |
context->palette = av_buffer_alloc(AVPALETTE_SIZE); |
if (!context->palette) |
return AVERROR(ENOMEM); |
if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) |
avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt); |
else |
memset(context->palette->data, 0, AVPALETTE_SIZE); |
} |
|
if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) && |
avctx->pix_fmt == AV_PIX_FMT_PAL8 && |
(!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) { |
context->is_2_4_bpp = 1; |
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); |
} |
|
if ((avctx->extradata_size >= 9 && |
!memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) || |
avctx->codec_tag == MKTAG('c','y','u','v') || |
avctx->codec_tag == MKTAG(3, 0, 0, 0) || |
avctx->codec_tag == MKTAG('W','R','A','W')) |
context->flip = 1; |
|
if (avctx->codec_tag == AV_RL32("yuv2") && |
avctx->pix_fmt == AV_PIX_FMT_YUYV422) |
context->is_yuv2 = 1; |
|
return 0; |
} |
|
static void flip(AVCodecContext *avctx, AVPicture *picture) |
{ |
picture->data[0] += picture->linesize[0] * (avctx->height - 1); |
picture->linesize[0] *= -1; |
} |
|
static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame, |
AVPacket *avpkt) |
{ |
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt); |
RawVideoContext *context = avctx->priv_data; |
const uint8_t *buf = avpkt->data; |
int buf_size = avpkt->size; |
int linesize_align = 4; |
int res, len; |
int need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2; |
|
AVFrame *frame = data; |
AVPicture *picture = data; |
|
frame->pict_type = AV_PICTURE_TYPE_I; |
frame->key_frame = 1; |
frame->reordered_opaque = avctx->reordered_opaque; |
frame->pkt_pts = avctx->pkt->pts; |
av_frame_set_pkt_pos (frame, avctx->pkt->pos); |
av_frame_set_pkt_duration(frame, avctx->pkt->duration); |
|
if (context->tff >= 0) { |
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; |
|
if (need_copy) |
frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size)); |
else |
frame->buf[0] = av_buffer_ref(avpkt->buf); |
if (!frame->buf[0]) |
return AVERROR(ENOMEM); |
|
//2bpp and 4bpp raw in avi and mov (yes this is ugly ...) |
if (context->is_2_4_bpp) { |
int i; |
uint8_t *dst = frame->buf[0]->data; |
buf_size = context->frame_size - AVPALETTE_SIZE; |
if (avctx->bits_per_coded_sample == 4) { |
for (i = 0; 2 * i + 1 < buf_size && i<avpkt->size; i++) { |
dst[2 * i + 0] = buf[i] >> 4; |
dst[2 * i + 1] = buf[i] & 15; |
} |
linesize_align = 8; |
} else { |
av_assert0(avctx->bits_per_coded_sample == 2); |
for (i = 0; 4 * i + 3 < buf_size && i<avpkt->size; i++) { |
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; |
} |
linesize_align = 16; |
} |
buf = dst; |
} else if (need_copy) { |
memcpy(frame->buf[0]->data, buf, buf_size); |
buf = frame->buf[0]->data; |
} |
|
if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') || |
avctx->codec_tag == MKTAG('A', 'V', 'u', 'p')) |
buf += buf_size - context->frame_size; |
|
len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0); |
if (buf_size < len) { |
av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len); |
av_buffer_unref(&frame->buf[0]); |
return AVERROR(EINVAL); |
} |
|
if ((res = avpicture_fill(picture, buf, avctx->pix_fmt, |
avctx->width, avctx->height)) < 0) { |
av_buffer_unref(&frame->buf[0]); |
return res; |
} |
|
if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, |
NULL); |
|
if (pal) { |
av_buffer_unref(&context->palette); |
context->palette = av_buffer_alloc(AVPALETTE_SIZE); |
if (!context->palette) { |
av_buffer_unref(&frame->buf[0]); |
return AVERROR(ENOMEM); |
} |
memcpy(context->palette->data, pal, AVPALETTE_SIZE); |
frame->palette_has_changed = 1; |
} |
} |
|
if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 || |
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) && |
FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size) |
frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align); |
|
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) { |
int la0 = FFALIGN(frame->linesize[0], linesize_align); |
frame->data[1] += (la0 - frame->linesize[0]) * avctx->height; |
frame->linesize[0] = la0; |
frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align); |
} |
|
if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) || |
(desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) { |
frame->buf[1] = av_buffer_ref(context->palette); |
if (!frame->buf[1]) { |
av_buffer_unref(&frame->buf[0]); |
return AVERROR(ENOMEM); |
} |
frame->data[1] = frame->buf[1]->data; |
} |
|
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; |
|
if (context->flip) |
flip(avctx, picture); |
|
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')) |
FFSWAP(uint8_t *, picture->data[1], picture->data[2]); |
|
if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) { |
picture->data[1] = picture->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height; |
picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4; |
} |
|
if (avctx->codec_tag == AV_RL32("yuv2") && |
avctx->pix_fmt == AV_PIX_FMT_YUYV422) { |
int x, y; |
uint8_t *line = picture->data[0]; |
for (y = 0; y < avctx->height; y++) { |
for (x = 0; x < avctx->width; x++) |
line[2 * x + 1] ^= 0x80; |
line += picture->linesize[0]; |
} |
} |
if (avctx->codec_tag == AV_RL32("YVYU") && |
avctx->pix_fmt == AV_PIX_FMT_YUYV422) { |
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]; |
} |
} |
|
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; |
} |
|
*got_frame = 1; |
return buf_size; |
} |
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static av_cold int raw_close_decoder(AVCodecContext *avctx) |
{ |
RawVideoContext *context = avctx->priv_data; |
|
av_buffer_unref(&context->palette); |
return 0; |
} |
|
AVCodec ff_rawvideo_decoder = { |
.name = "rawvideo", |
.long_name = NULL_IF_CONFIG_SMALL("raw video"), |
.type = AVMEDIA_TYPE_VIDEO, |
.id = AV_CODEC_ID_RAWVIDEO, |
.priv_data_size = sizeof(RawVideoContext), |
.init = raw_init_decoder, |
.close = raw_close_decoder, |
.decode = raw_decode, |
.priv_class = &rawdec_class, |
}; |