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ffmpeg/libavcodec/cri.c

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/*
* CRI image decoder
*
* Copyright (c) 2020 Paul B Mahol
*
* 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
* Cintel RAW image decoder
*/
#define BITSTREAM_READER_LE
#include "libavutil/intfloat.h"
#include "libavutil/display.h"
#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.h"
#include "thread.h"
typedef struct CRIContext {
AVCodecContext *jpeg_avctx; // wrapper context for MJPEG
AVPacket *jpkt; // encoded JPEG tile
AVFrame *jpgframe; // decoded JPEG tile
GetByteContext gb;
int color_model;
const uint8_t *data;
unsigned data_size;
uint64_t tile_size[4];
} CRIContext;
static av_cold int cri_decode_init(AVCodecContext *avctx)
{
CRIContext *s = avctx->priv_data;
const AVCodec *codec;
int ret;
s->jpgframe = av_frame_alloc();
if (!s->jpgframe)
return AVERROR(ENOMEM);
s->jpkt = av_packet_alloc();
if (!s->jpkt)
return AVERROR(ENOMEM);
codec = avcodec_find_decoder(AV_CODEC_ID_MJPEG);
if (!codec)
return AVERROR_BUG;
s->jpeg_avctx = avcodec_alloc_context3(codec);
if (!s->jpeg_avctx)
return AVERROR(ENOMEM);
s->jpeg_avctx->flags = avctx->flags;
s->jpeg_avctx->flags2 = avctx->flags2;
s->jpeg_avctx->idct_algo = avctx->idct_algo;
ret = avcodec_open2(s->jpeg_avctx, codec, NULL);
if (ret < 0)
return ret;
return 0;
}
static void unpack_10bit(GetByteContext *gb, uint16_t *dst, int shift,
int w, int h, ptrdiff_t stride)
{
int count = w * h;
int pos = 0;
while (count > 0) {
uint32_t a0, a1, a2, a3;
if (bytestream2_get_bytes_left(gb) < 4)
break;
a0 = bytestream2_get_le32(gb);
a1 = bytestream2_get_le32(gb);
a2 = bytestream2_get_le32(gb);
a3 = bytestream2_get_le32(gb);
dst[pos] = (((a0 >> 1) & 0xE00) | (a0 & 0x1FF)) << shift;
pos++;
if (pos >= w) {
if (count == 1)
break;
dst += stride;
pos = 0;
}
dst[pos] = (((a0 >> 13) & 0x3F) | ((a0 >> 14) & 0xFC0)) << shift;
pos++;
if (pos >= w) {
if (count == 2)
break;
dst += stride;
pos = 0;
}
dst[pos] = (((a0 >> 26) & 7) | ((a1 & 0x1FF) << 3)) << shift;
pos++;
if (pos >= w) {
if (count == 3)
break;
dst += stride;
pos = 0;
}
dst[pos] = (((a1 >> 10) & 0x1FF) | ((a1 >> 11) & 0xE00)) << shift;
pos++;
if (pos >= w) {
if (count == 4)
break;
dst += stride;
pos = 0;
}
dst[pos] = (((a1 >> 23) & 0x3F) | ((a2 & 0x3F) << 6)) << shift;
pos++;
if (pos >= w) {
if (count == 5)
break;
dst += stride;
pos = 0;
}
dst[pos] = (((a2 >> 7) & 0xFF8) | ((a2 >> 6) & 7)) << shift;
pos++;
if (pos >= w) {
if (count == 6)
break;
dst += stride;
pos = 0;
}
dst[pos] = (((a3 & 7) << 9) | ((a2 >> 20) & 0x1FF)) << shift;
pos++;
if (pos >= w) {
if (count == 7)
break;
dst += stride;
pos = 0;
}
dst[pos] = (((a3 >> 4) & 0xFC0) | ((a3 >> 3) & 0x3F)) << shift;
pos++;
if (pos >= w) {
if (count == 8)
break;
dst += stride;
pos = 0;
}
dst[pos] = (((a3 >> 16) & 7) | ((a3 >> 17) & 0xFF8)) << shift;
pos++;
if (pos >= w) {
if (count == 9)
break;
dst += stride;
pos = 0;
}
count -= 9;
}
}
static int cri_decode_frame(AVCodecContext *avctx, AVFrame *p,
int *got_frame, AVPacket *avpkt)
{
CRIContext *s = avctx->priv_data;
GetByteContext *gb = &s->gb;
int ret, bps, hflip = 0, vflip = 0;
AVFrameSideData *rotation;
int compressed = 0;
s->data = NULL;
s->data_size = 0;
bytestream2_init(gb, avpkt->data, avpkt->size);
while (bytestream2_get_bytes_left(gb) > 8) {
char codec_name[1024];
uint32_t key, length;
float framerate;
int width, height;
key = bytestream2_get_le32(gb);
length = bytestream2_get_le32(gb);
switch (key) {
case 1:
if (length != 4)
return AVERROR_INVALIDDATA;
if (bytestream2_get_le32(gb) != MKTAG('D', 'V', 'C', 'C'))
return AVERROR_INVALIDDATA;
break;
case 100:
if (length < 16)
return AVERROR_INVALIDDATA;
width = bytestream2_get_le32(gb);
height = bytestream2_get_le32(gb);
s->color_model = bytestream2_get_le32(gb);
if (bytestream2_get_le32(gb) != 1)
return AVERROR_INVALIDDATA;
ret = ff_set_dimensions(avctx, width, height);
if (ret < 0)
return ret;
length -= 16;
goto skip;
case 101:
if (length != 4)
return AVERROR_INVALIDDATA;
if (bytestream2_get_le32(gb) != 0)
return AVERROR_INVALIDDATA;
break;
case 102:
bytestream2_get_buffer(gb, codec_name, FFMIN(length, sizeof(codec_name) - 1));
length -= FFMIN(length, sizeof(codec_name) - 1);
if (strncmp(codec_name, "cintel_craw", FFMIN(length, sizeof(codec_name) - 1)))
return AVERROR_INVALIDDATA;
compressed = 1;
goto skip;
case 103:
if (bytestream2_get_bytes_left(gb) < length)
return AVERROR_INVALIDDATA;
s->data = gb->buffer;
s->data_size = length;
goto skip;
case 105:
if (length <= 0)
return AVERROR_INVALIDDATA;
hflip = bytestream2_get_byte(gb) != 0;
length--;
goto skip;
case 106:
if (length <= 0)
return AVERROR_INVALIDDATA;
vflip = bytestream2_get_byte(gb) != 0;
length--;
goto skip;
case 107:
if (length != 4)
return AVERROR_INVALIDDATA;
framerate = av_int2float(bytestream2_get_le32(gb));
avctx->framerate.num = framerate * 1000;
avctx->framerate.den = 1000;
break;
case 119:
if (length != 32)
return AVERROR_INVALIDDATA;
for (int i = 0; i < 4; i++)
s->tile_size[i] = bytestream2_get_le64(gb);
break;
default:
av_log(avctx, AV_LOG_DEBUG, "skipping unknown key %u of length %u\n", key, length);
skip:
bytestream2_skip(gb, length);
}
}
switch (s->color_model) {
case 76:
case 88:
avctx->pix_fmt = AV_PIX_FMT_BAYER_BGGR16;
break;
case 77:
case 89:
avctx->pix_fmt = AV_PIX_FMT_BAYER_GBRG16;
break;
case 78:
case 90:
avctx->pix_fmt = AV_PIX_FMT_BAYER_RGGB16;
break;
case 45:
case 79:
case 91:
avctx->pix_fmt = AV_PIX_FMT_BAYER_GRBG16;
break;
}
switch (s->color_model) {
case 45:
bps = 10;
break;
case 76:
case 77:
case 78:
case 79:
bps = 12;
break;
case 88:
case 89:
case 90:
case 91:
bps = 16;
break;
default:
return AVERROR_INVALIDDATA;
}
if (compressed) {
for (int i = 0; i < 4; i++) {
if (s->tile_size[i] >= s->data_size)
return AVERROR_INVALIDDATA;
}
if (s->tile_size[0] + s->tile_size[1] + s->tile_size[2] + s->tile_size[3] !=
s->data_size)
return AVERROR_INVALIDDATA;
}
if (!s->data || !s->data_size)
return AVERROR_INVALIDDATA;
if (avctx->skip_frame >= AVDISCARD_ALL)
return avpkt->size;
if ((ret = ff_thread_get_buffer(avctx, p, 0)) < 0)
return ret;
avctx->bits_per_raw_sample = bps;
if (!compressed && s->color_model == 45) {
uint16_t *dst = (uint16_t *)p->data[0];
GetByteContext gb;
bytestream2_init(&gb, s->data, s->data_size);
unpack_10bit(&gb, dst, 4, avctx->width, avctx->height, p->linesize[0] / 2);
} else if (!compressed) {
GetBitContext gbit;
const int shift = 16 - bps;
ret = init_get_bits8(&gbit, s->data, s->data_size);
if (ret < 0)
return ret;
for (int y = 0; y < avctx->height; y++) {
uint16_t *dst = (uint16_t *)(p->data[0] + y * p->linesize[0]);
if (get_bits_left(&gbit) < avctx->width * bps)
break;
for (int x = 0; x < avctx->width; x++)
dst[x] = get_bits(&gbit, bps) << shift;
}
} else {
unsigned offset = 0;
for (int tile = 0; tile < 4; tile++) {
av_packet_unref(s->jpkt);
s->jpkt->data = (uint8_t *)s->data + offset;
s->jpkt->size = s->tile_size[tile];
ret = avcodec_send_packet(s->jpeg_avctx, s->jpkt);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
return ret;
}
ret = avcodec_receive_frame(s->jpeg_avctx, s->jpgframe);
if (ret < 0 || s->jpgframe->format != AV_PIX_FMT_GRAY16 ||
s->jpeg_avctx->width * 2 != avctx->width ||
s->jpeg_avctx->height * 2 != avctx->height) {
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR,
"JPEG decoding error (%d).\n", ret);
} else {
av_log(avctx, AV_LOG_ERROR,
"JPEG invalid format.\n");
ret = AVERROR_INVALIDDATA;
}
/* Normally skip, if error explode */
if (avctx->err_recognition & AV_EF_EXPLODE)
return ret;
else
return 0;
}
for (int y = 0; y < s->jpeg_avctx->height; y++) {
const int hw = s->jpgframe->width / 2;
uint16_t *dst = (uint16_t *)(p->data[0] + (y * 2) * p->linesize[0] + tile * hw * 2);
const uint16_t *src = (const uint16_t *)(s->jpgframe->data[0] + y * s->jpgframe->linesize[0]);
memcpy(dst, src, hw * 2);
src += hw;
dst += p->linesize[0] / 2;
memcpy(dst, src, hw * 2);
}
av_frame_unref(s->jpgframe);
offset += s->tile_size[tile];
}
}
if (hflip || vflip) {
ff_frame_new_side_data(avctx, p, AV_FRAME_DATA_DISPLAYMATRIX,
sizeof(int32_t) * 9, &rotation);
if (rotation) {
av_display_rotation_set((int32_t *)rotation->data, 0.f);
av_display_matrix_flip((int32_t *)rotation->data, hflip, vflip);
}
}
*got_frame = 1;
return 0;
}
static av_cold int cri_decode_close(AVCodecContext *avctx)
{
CRIContext *s = avctx->priv_data;
av_frame_free(&s->jpgframe);
av_packet_free(&s->jpkt);
avcodec_free_context(&s->jpeg_avctx);
return 0;
}
const FFCodec ff_cri_decoder = {
.p.name = "cri",
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_CRI,
.priv_data_size = sizeof(CRIContext),
.init = cri_decode_init,
FF_CODEC_DECODE_CB(cri_decode_frame),
.close = cri_decode_close,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP |
FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
CODEC_LONG_NAME("Cintel RAW"),
};
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