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d6fc031caf
PSEUDOPAL pixel formats are not paletted, but carried a palette with the intention of allowing code to treat unpaletted formats as paletted. The palette simply mapped the byte values to the resulting RGB values, making it some sort of LUT for RGB conversion. It was used for 1 byte formats only: RGB4_BYTE, BGR4_BYTE, RGB8, BGR8, GRAY8. The first 4 are awfully obscure, used only by some ancient bitmap formats. The last one, GRAY8, is more common, but its treatment is grossly incorrect. It considers full range GRAY8 only, so GRAY8 coming from typical Y video planes was not mapped to the correct RGB values. This cannot be fixed, because AVFrame.color_range can be freely changed at runtime, and there is nothing to ensure the pseudo palette is updated. Also, nothing actually used the PSEUDOPAL palette data, except xwdenc (trivially changed in the previous commit). All other code had to treat it as a special case, just to ignore or to propagate palette data. In conclusion, this was just a very strange old mechnaism that has no real justification to exist anymore (although it may have been nice and useful in the past). Now it's an artifact that makes the API harder to use: API users who allocate their own pixel data have to be aware that they need to allocate the palette, or FFmpeg will crash on them in _some_ situations. On top of this, there was no API to allocate the pseuo palette outside of av_frame_get_buffer(). This patch not only deprecates AV_PIX_FMT_FLAG_PSEUDOPAL, but also makes the pseudo palette optional. Nothing accesses it anymore, though if it's set, it's propagated. It's still allocated and initialized for compatibility with API users that rely on this feature. But new API users do not need to allocate it. This was an explicit goal of this patch. Most changes replace AV_PIX_FMT_FLAG_PSEUDOPAL with FF_PSEUDOPAL. I first tried #ifdefing all code, but it was a mess. The FF_PSEUDOPAL macro reduces the mess, and still allows defining FF_API_PSEUDOPAL to 0. Passes FATE with FF_API_PSEUDOPAL enabled and disabled. In addition, FATE passes with FF_API_PSEUDOPAL set to 1, but with allocation functions manually changed to not allocating a palette.
507 lines
19 KiB
C
507 lines
19 KiB
C
/*
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* Raw Video Decoder
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* Copyright (c) 2001 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Raw Video Decoder
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*/
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#include "avcodec.h"
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#include "bswapdsp.h"
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#include "get_bits.h"
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#include "internal.h"
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#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;
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int frame_size; /* size of the frame in bytes */
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int flip;
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int is_1_2_4_8_bpp; // 1, 2, 4 and 8 bpp in avi/mov, 1 and 8 bpp in nut
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int is_mono;
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int is_pal8;
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int is_nut_mono;
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int is_nut_pal8;
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int is_yuv2;
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int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16
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int tff;
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BswapDSPContext bbdsp;
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void *bitstream_buf;
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unsigned int bitstream_buf_size;
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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_BOOL, {.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",
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static av_cold int raw_init_decoder(AVCodecContext *avctx)
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{
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RawVideoContext *context = avctx->priv_data;
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const AVPixFmtDescriptor *desc;
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ff_bswapdsp_init(&context->bbdsp);
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if ( avctx->codec_tag == MKTAG('r','a','w',' ')
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|| avctx->codec_tag == MKTAG('N','O','1','6'))
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avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_mov,
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avctx->bits_per_coded_sample);
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else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
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avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
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avctx->bits_per_coded_sample);
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else if (avctx->codec_tag && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0))
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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(avpriv_pix_fmt_bps_avi,
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avctx->bits_per_coded_sample);
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desc = av_pix_fmt_desc_get(avctx->pix_fmt);
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if (!desc) {
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av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
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return AVERROR(EINVAL);
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}
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if (desc->flags & (AV_PIX_FMT_FLAG_PAL | FF_PSEUDOPAL)) {
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context->palette = av_buffer_alloc(AVPALETTE_SIZE);
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if (!context->palette)
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return AVERROR(ENOMEM);
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#if FF_API_PSEUDOPAL
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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);
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#endif
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else {
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memset(context->palette->data, 0, AVPALETTE_SIZE);
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if (avctx->bits_per_coded_sample == 1)
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memset(context->palette->data, 0xff, 4);
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}
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}
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if ((avctx->extradata_size >= 9 &&
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!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) ||
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avctx->codec_tag == MKTAG('W','R','A','W'))
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context->flip = 1;
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if (avctx->pix_fmt == AV_PIX_FMT_MONOWHITE ||
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avctx->pix_fmt == AV_PIX_FMT_MONOBLACK)
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context->is_mono = 1;
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else if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
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context->is_pal8 = 1;
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if (avctx->codec_tag == MKTAG('B','1','W','0') ||
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avctx->codec_tag == MKTAG('B','0','W','1'))
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context->is_nut_mono = 1;
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else if (avctx->codec_tag == MKTAG('P','A','L',8))
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context->is_nut_pal8 = 1;
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if (avctx->codec_tag == AV_RL32("yuv2") &&
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avctx->pix_fmt == AV_PIX_FMT_YUYV422)
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context->is_yuv2 = 1;
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return 0;
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}
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static void flip(AVCodecContext *avctx, AVFrame *frame)
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{
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frame->data[0] += frame->linesize[0] * (avctx->height - 1);
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frame->linesize[0] *= -1;
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}
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/*
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* Scale sample to 16-bit resolution
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*/
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#define SCALE16(x, bits) (((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16)))
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/**
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* Scale buffer to 16 bits per coded sample resolution
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*/
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#define MKSCALE16(name, r16, w16) \
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static void name(AVCodecContext *avctx, uint8_t * dst, const uint8_t *buf, int buf_size, int packed) \
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{ \
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int i; \
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if (!packed) { \
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for (i = 0; i + 1 < buf_size; i += 2) \
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w16(dst + i, SCALE16(r16(buf + i), avctx->bits_per_coded_sample)); \
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} else { \
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GetBitContext gb; \
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init_get_bits(&gb, buf, buf_size * 8); \
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for (i = 0; i < avctx->width * avctx->height; i++) { \
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int sample = get_bits(&gb, avctx->bits_per_coded_sample); \
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w16(dst + i*2, SCALE16(sample, avctx->bits_per_coded_sample)); \
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} \
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} \
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}
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MKSCALE16(scale16be, AV_RB16, AV_WB16)
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MKSCALE16(scale16le, AV_RL16, AV_WL16)
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static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
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AVPacket *avpkt)
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{
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const AVPixFmtDescriptor *desc;
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RawVideoContext *context = avctx->priv_data;
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const uint8_t *buf = avpkt->data;
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int buf_size = avpkt->size;
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int linesize_align = 4;
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int stride;
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int res, len;
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int need_copy;
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AVFrame *frame = data;
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if (avctx->width <= 0) {
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av_log(avctx, AV_LOG_ERROR, "width is not set\n");
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return AVERROR_INVALIDDATA;
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}
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if (avctx->height <= 0) {
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av_log(avctx, AV_LOG_ERROR, "height is not set\n");
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return AVERROR_INVALIDDATA;
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}
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if (context->is_nut_mono)
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stride = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
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else if (context->is_nut_pal8)
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stride = avctx->width;
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else
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stride = avpkt->size / avctx->height;
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av_log(avctx, AV_LOG_DEBUG, "PACKET SIZE: %d, STRIDE: %d\n", avpkt->size, stride);
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if (stride == 0 || avpkt->size < stride * avctx->height) {
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av_log(avctx, AV_LOG_ERROR, "Packet too small (%d)\n", avpkt->size);
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return AVERROR_INVALIDDATA;
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}
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desc = av_pix_fmt_desc_get(avctx->pix_fmt);
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if ((avctx->bits_per_coded_sample == 8 || avctx->bits_per_coded_sample == 4 ||
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avctx->bits_per_coded_sample == 2 || avctx->bits_per_coded_sample == 1 ||
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(avctx->bits_per_coded_sample == 0 && (context->is_nut_pal8 || context->is_mono)) ) &&
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(context->is_mono || context->is_pal8) &&
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(!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' ') ||
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context->is_nut_mono || context->is_nut_pal8)) {
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context->is_1_2_4_8_bpp = 1;
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if (context->is_mono) {
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int row_bytes = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
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context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
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FFALIGN(row_bytes, 16) * 8,
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avctx->height, 1);
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} else
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context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
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FFALIGN(avctx->width, 16),
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avctx->height, 1);
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} else {
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context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample && avctx->bits_per_coded_sample < 16;
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context->frame_size = av_image_get_buffer_size(avctx->pix_fmt, avctx->width,
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avctx->height, 1);
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}
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if (context->frame_size < 0)
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return context->frame_size;
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need_copy = !avpkt->buf || context->is_1_2_4_8_bpp || context->is_yuv2 || context->is_lt_16bpp;
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frame->pict_type = AV_PICTURE_TYPE_I;
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frame->key_frame = 1;
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res = ff_decode_frame_props(avctx, frame);
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if (res < 0)
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return res;
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frame->pkt_pos = avctx->internal->last_pkt_props->pos;
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frame->pkt_duration = avctx->internal->last_pkt_props->duration;
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if (context->tff >= 0) {
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frame->interlaced_frame = 1;
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frame->top_field_first = context->tff;
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}
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if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
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return res;
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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
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frame->buf[0] = av_buffer_ref(avpkt->buf);
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if (!frame->buf[0])
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return AVERROR(ENOMEM);
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// 1, 2, 4 and 8 bpp in avi/mov, 1 and 8 bpp in nut
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if (context->is_1_2_4_8_bpp) {
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int i, j, row_pix = 0;
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uint8_t *dst = frame->buf[0]->data;
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buf_size = context->frame_size - (context->is_pal8 ? AVPALETTE_SIZE : 0);
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if (avctx->bits_per_coded_sample == 8 || context->is_nut_pal8 || context->is_mono) {
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int pix_per_byte = context->is_mono ? 8 : 1;
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for (i = 0, j = 0; j < buf_size && i<avpkt->size; i++, j++) {
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dst[j] = buf[i];
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row_pix += pix_per_byte;
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if (row_pix >= avctx->width) {
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i += stride - (i % stride) - 1;
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j += 16 - (j % 16) - 1;
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row_pix = 0;
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}
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}
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} else if (avctx->bits_per_coded_sample == 4) {
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for (i = 0, j = 0; 2 * j + 1 < buf_size && i<avpkt->size; i++, j++) {
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dst[2 * j + 0] = buf[i] >> 4;
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dst[2 * j + 1] = buf[i] & 15;
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row_pix += 2;
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if (row_pix >= avctx->width) {
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i += stride - (i % stride) - 1;
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j += 8 - (j % 8) - 1;
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row_pix = 0;
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}
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}
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} else if (avctx->bits_per_coded_sample == 2) {
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for (i = 0, j = 0; 4 * j + 3 < buf_size && i<avpkt->size; i++, j++) {
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dst[4 * j + 0] = buf[i] >> 6;
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dst[4 * j + 1] = buf[i] >> 4 & 3;
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dst[4 * j + 2] = buf[i] >> 2 & 3;
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dst[4 * j + 3] = buf[i] & 3;
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row_pix += 4;
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if (row_pix >= avctx->width) {
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i += stride - (i % stride) - 1;
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j += 4 - (j % 4) - 1;
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row_pix = 0;
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}
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}
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} else {
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av_assert0(avctx->bits_per_coded_sample == 1);
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for (i = 0, j = 0; 8 * j + 7 < buf_size && i<avpkt->size; i++, j++) {
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dst[8 * j + 0] = buf[i] >> 7;
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dst[8 * j + 1] = buf[i] >> 6 & 1;
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dst[8 * j + 2] = buf[i] >> 5 & 1;
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dst[8 * j + 3] = buf[i] >> 4 & 1;
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dst[8 * j + 4] = buf[i] >> 3 & 1;
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dst[8 * j + 5] = buf[i] >> 2 & 1;
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dst[8 * j + 6] = buf[i] >> 1 & 1;
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dst[8 * j + 7] = buf[i] & 1;
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row_pix += 8;
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if (row_pix >= avctx->width) {
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i += stride - (i % stride) - 1;
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j += 2 - (j % 2) - 1;
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row_pix = 0;
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}
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}
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}
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linesize_align = 16;
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buf = dst;
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} else if (context->is_lt_16bpp) {
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uint8_t *dst = frame->buf[0]->data;
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int packed = (avctx->codec_tag & 0xFFFFFF) == MKTAG('B','I','T', 0);
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int swap = avctx->codec_tag >> 24;
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if (packed && swap) {
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av_fast_padded_malloc(&context->bitstream_buf, &context->bitstream_buf_size, buf_size);
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if (!context->bitstream_buf)
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return AVERROR(ENOMEM);
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if (swap == 16)
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context->bbdsp.bswap16_buf(context->bitstream_buf, (const uint16_t*)buf, buf_size / 2);
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else if (swap == 32)
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context->bbdsp.bswap_buf(context->bitstream_buf, (const uint32_t*)buf, buf_size / 4);
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else
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return AVERROR_INVALIDDATA;
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buf = context->bitstream_buf;
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}
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if (desc->flags & AV_PIX_FMT_FLAG_BE)
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scale16be(avctx, dst, buf, buf_size, packed);
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else
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scale16le(avctx, dst, buf, buf_size, packed);
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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') ||
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avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
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buf += buf_size - context->frame_size;
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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 && ((avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0) || !need_copy)) {
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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 = av_image_fill_arrays(frame->data, frame->linesize,
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buf, avctx->pix_fmt,
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avctx->width, avctx->height, 1)) < 0) {
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av_buffer_unref(&frame->buf[0]);
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return res;
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}
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if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
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int pal_size;
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const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
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&pal_size);
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int ret;
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if (pal && pal_size != AVPALETTE_SIZE) {
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av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", pal_size);
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pal = NULL;
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}
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if (!context->palette)
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context->palette = av_buffer_alloc(AVPALETTE_SIZE);
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if (!context->palette) {
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av_buffer_unref(&frame->buf[0]);
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return AVERROR(ENOMEM);
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}
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ret = av_buffer_make_writable(&context->palette);
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if (ret < 0) {
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av_buffer_unref(&frame->buf[0]);
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return ret;
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}
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if (pal) {
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memcpy(context->palette->data, pal, AVPALETTE_SIZE);
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frame->palette_has_changed = 1;
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} else if (context->is_nut_pal8) {
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int vid_size = avctx->width * avctx->height;
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int pal_size = avpkt->size - vid_size;
|
|
|
|
if (avpkt->size > vid_size && pal_size <= AVPALETTE_SIZE) {
|
|
pal = avpkt->data + vid_size;
|
|
memcpy(context->palette->data, pal, pal_size);
|
|
frame->palette_has_changed = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((avctx->pix_fmt==AV_PIX_FMT_RGB24 ||
|
|
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_MONOBLACK ||
|
|
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 & FF_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, frame);
|
|
|
|
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 *, frame->data[1], frame->data[2]);
|
|
|
|
if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
|
|
frame->data[1] = frame->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
|
|
frame->data[2] = frame->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 = frame->data[0];
|
|
for (y = 0; y < avctx->height; y++) {
|
|
for (x = 0; x < avctx->width; x++)
|
|
line[2 * x + 1] ^= 0x80;
|
|
line += frame->linesize[0];
|
|
}
|
|
}
|
|
|
|
if (avctx->codec_tag == AV_RL32("b64a") &&
|
|
avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) {
|
|
uint8_t *dst = frame->data[0];
|
|
uint64_t v;
|
|
int x;
|
|
for (x = 0; x >> 3 < avctx->width * avctx->height; x += 8) {
|
|
v = AV_RB64(&dst[x]);
|
|
AV_WB64(&dst[x], v << 16 | v >> 48);
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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,
|
|
.capabilities = AV_CODEC_CAP_PARAM_CHANGE,
|
|
};
|