mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
2fb593dcb9
The amv one probably looks suspicious, but since it's an intra-only codec, I couldn't possibly imagine what it would use the edge for, and the vsynth fate result doesn't change, so it's probably OK.
304 lines
9.7 KiB
C
304 lines
9.7 KiB
C
/*
|
|
* MJPEG encoder
|
|
* Copyright (c) 2000, 2001 Fabrice Bellard
|
|
* Copyright (c) 2003 Alex Beregszaszi
|
|
* Copyright (c) 2003-2004 Michael Niedermayer
|
|
*
|
|
* Support for external huffman table, various fixes (AVID workaround),
|
|
* aspecting, new decode_frame mechanism and apple mjpeg-b support
|
|
* by Alex Beregszaszi
|
|
*
|
|
* 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
|
|
* MJPEG encoder.
|
|
*/
|
|
|
|
#include "libavutil/pixdesc.h"
|
|
|
|
#include "avcodec.h"
|
|
#include "jpegtables.h"
|
|
#include "mjpegenc_common.h"
|
|
#include "mpegvideo.h"
|
|
#include "mjpeg.h"
|
|
#include "mjpegenc.h"
|
|
|
|
static uint8_t uni_ac_vlc_len[64 * 64 * 2];
|
|
static uint8_t uni_chroma_ac_vlc_len[64 * 64 * 2];
|
|
|
|
static av_cold void init_uni_ac_vlc(const uint8_t huff_size_ac[256], uint8_t *uni_ac_vlc_len)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 128; i++) {
|
|
int level = i - 64;
|
|
int run;
|
|
if (!level)
|
|
continue;
|
|
for (run = 0; run < 64; run++) {
|
|
int len, code, nbits;
|
|
int alevel = FFABS(level);
|
|
|
|
len = (run >> 4) * huff_size_ac[0xf0];
|
|
|
|
nbits= av_log2_16bit(alevel) + 1;
|
|
code = ((15&run) << 4) | nbits;
|
|
|
|
len += huff_size_ac[code] + nbits;
|
|
|
|
uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
|
|
// We ignore EOB as its just a constant which does not change generally
|
|
}
|
|
}
|
|
}
|
|
|
|
av_cold int ff_mjpeg_encode_init(MpegEncContext *s)
|
|
{
|
|
MJpegContext *m;
|
|
|
|
if (s->width > 65500 || s->height > 65500) {
|
|
av_log(s, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
m = av_malloc(sizeof(MJpegContext));
|
|
if (!m)
|
|
return AVERROR(ENOMEM);
|
|
|
|
s->min_qcoeff=-1023;
|
|
s->max_qcoeff= 1023;
|
|
|
|
/* build all the huffman tables */
|
|
ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance,
|
|
m->huff_code_dc_luminance,
|
|
avpriv_mjpeg_bits_dc_luminance,
|
|
avpriv_mjpeg_val_dc);
|
|
ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance,
|
|
m->huff_code_dc_chrominance,
|
|
avpriv_mjpeg_bits_dc_chrominance,
|
|
avpriv_mjpeg_val_dc);
|
|
ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance,
|
|
m->huff_code_ac_luminance,
|
|
avpriv_mjpeg_bits_ac_luminance,
|
|
avpriv_mjpeg_val_ac_luminance);
|
|
ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance,
|
|
m->huff_code_ac_chrominance,
|
|
avpriv_mjpeg_bits_ac_chrominance,
|
|
avpriv_mjpeg_val_ac_chrominance);
|
|
|
|
init_uni_ac_vlc(m->huff_size_ac_luminance, uni_ac_vlc_len);
|
|
init_uni_ac_vlc(m->huff_size_ac_chrominance, uni_chroma_ac_vlc_len);
|
|
s->intra_ac_vlc_length =
|
|
s->intra_ac_vlc_last_length = uni_ac_vlc_len;
|
|
s->intra_chroma_ac_vlc_length =
|
|
s->intra_chroma_ac_vlc_last_length = uni_chroma_ac_vlc_len;
|
|
|
|
s->mjpeg_ctx = m;
|
|
return 0;
|
|
}
|
|
|
|
av_cold void ff_mjpeg_encode_close(MpegEncContext *s)
|
|
{
|
|
av_freep(&s->mjpeg_ctx);
|
|
}
|
|
|
|
static void encode_block(MpegEncContext *s, int16_t *block, int n)
|
|
{
|
|
int mant, nbits, code, i, j;
|
|
int component, dc, run, last_index, val;
|
|
MJpegContext *m = s->mjpeg_ctx;
|
|
uint8_t *huff_size_ac;
|
|
uint16_t *huff_code_ac;
|
|
|
|
/* DC coef */
|
|
component = (n <= 3 ? 0 : (n&1) + 1);
|
|
dc = block[0]; /* overflow is impossible */
|
|
val = dc - s->last_dc[component];
|
|
if (n < 4) {
|
|
ff_mjpeg_encode_dc(&s->pb, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
|
|
huff_size_ac = m->huff_size_ac_luminance;
|
|
huff_code_ac = m->huff_code_ac_luminance;
|
|
} else {
|
|
ff_mjpeg_encode_dc(&s->pb, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
|
|
huff_size_ac = m->huff_size_ac_chrominance;
|
|
huff_code_ac = m->huff_code_ac_chrominance;
|
|
}
|
|
s->last_dc[component] = dc;
|
|
|
|
/* AC coefs */
|
|
|
|
run = 0;
|
|
last_index = s->block_last_index[n];
|
|
for(i=1;i<=last_index;i++) {
|
|
j = s->intra_scantable.permutated[i];
|
|
val = block[j];
|
|
if (val == 0) {
|
|
run++;
|
|
} else {
|
|
while (run >= 16) {
|
|
put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
|
|
run -= 16;
|
|
}
|
|
mant = val;
|
|
if (val < 0) {
|
|
val = -val;
|
|
mant--;
|
|
}
|
|
|
|
nbits= av_log2_16bit(val) + 1;
|
|
code = (run << 4) | nbits;
|
|
|
|
put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
|
|
|
|
put_sbits(&s->pb, nbits, mant);
|
|
run = 0;
|
|
}
|
|
}
|
|
|
|
/* output EOB only if not already 64 values */
|
|
if (last_index < 63 || run != 0)
|
|
put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
|
|
}
|
|
|
|
void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64])
|
|
{
|
|
int i;
|
|
if (s->chroma_format == CHROMA_444) {
|
|
encode_block(s, block[0], 0);
|
|
encode_block(s, block[2], 2);
|
|
encode_block(s, block[4], 4);
|
|
encode_block(s, block[8], 8);
|
|
encode_block(s, block[5], 5);
|
|
encode_block(s, block[9], 9);
|
|
|
|
if (16*s->mb_x+8 < s->width) {
|
|
encode_block(s, block[1], 1);
|
|
encode_block(s, block[3], 3);
|
|
encode_block(s, block[6], 6);
|
|
encode_block(s, block[10], 10);
|
|
encode_block(s, block[7], 7);
|
|
encode_block(s, block[11], 11);
|
|
}
|
|
} else {
|
|
for(i=0;i<5;i++) {
|
|
encode_block(s, block[i], i);
|
|
}
|
|
if (s->chroma_format == CHROMA_420) {
|
|
encode_block(s, block[5], 5);
|
|
} else {
|
|
encode_block(s, block[6], 6);
|
|
encode_block(s, block[5], 5);
|
|
encode_block(s, block[7], 7);
|
|
}
|
|
}
|
|
|
|
s->i_tex_bits += get_bits_diff(s);
|
|
}
|
|
|
|
// maximum over s->mjpeg_vsample[i]
|
|
#define V_MAX 2
|
|
static int amv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
|
|
const AVFrame *pic_arg, int *got_packet)
|
|
|
|
{
|
|
MpegEncContext *s = avctx->priv_data;
|
|
AVFrame *pic;
|
|
int i, ret;
|
|
int chroma_h_shift, chroma_v_shift;
|
|
|
|
av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift, &chroma_v_shift);
|
|
|
|
#if FF_API_EMU_EDGE
|
|
//CODEC_FLAG_EMU_EDGE have to be cleared
|
|
if(s->avctx->flags & CODEC_FLAG_EMU_EDGE)
|
|
return AVERROR(EINVAL);
|
|
#endif
|
|
|
|
if ((avctx->height & 15) && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Heights which are not a multiple of 16 might fail with some decoders, "
|
|
"use vstrict=-1 / -strict -1 to use %d anyway.\n", avctx->height);
|
|
av_log(avctx, AV_LOG_WARNING, "If you have a device that plays AMV videos, please test if videos "
|
|
"with such heights work with it and report your findings to ffmpeg-devel@ffmpeg.org\n");
|
|
return AVERROR_EXPERIMENTAL;
|
|
}
|
|
|
|
pic = av_frame_clone(pic_arg);
|
|
if (!pic)
|
|
return AVERROR(ENOMEM);
|
|
//picture should be flipped upside-down
|
|
for(i=0; i < 3; i++) {
|
|
int vsample = i ? 2 >> chroma_v_shift : 2;
|
|
pic->data[i] += pic->linesize[i] * (vsample * s->height / V_MAX - 1);
|
|
pic->linesize[i] *= -1;
|
|
}
|
|
ret = ff_mpv_encode_picture(avctx, pkt, pic, got_packet);
|
|
av_frame_free(&pic);
|
|
return ret;
|
|
}
|
|
|
|
#if CONFIG_MJPEG_ENCODER
|
|
|
|
static const AVClass mjpeg_class = {
|
|
.class_name = "mjpeg encoder",
|
|
.item_name = av_default_item_name,
|
|
.option = ff_mpv_generic_options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVCodec ff_mjpeg_encoder = {
|
|
.name = "mjpeg",
|
|
.long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_MJPEG,
|
|
.priv_data_size = sizeof(MpegEncContext),
|
|
.init = ff_mpv_encode_init,
|
|
.encode2 = ff_mpv_encode_picture,
|
|
.close = ff_mpv_encode_end,
|
|
.capabilities = AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_INTRA_ONLY,
|
|
.pix_fmts = (const enum AVPixelFormat[]){
|
|
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE
|
|
},
|
|
.priv_class = &mjpeg_class,
|
|
};
|
|
#endif
|
|
#if CONFIG_AMV_ENCODER
|
|
static const AVClass amv_class = {
|
|
.class_name = "amv encoder",
|
|
.item_name = av_default_item_name,
|
|
.option = ff_mpv_generic_options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVCodec ff_amv_encoder = {
|
|
.name = "amv",
|
|
.long_name = NULL_IF_CONFIG_SMALL("AMV Video"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_AMV,
|
|
.priv_data_size = sizeof(MpegEncContext),
|
|
.init = ff_mpv_encode_init,
|
|
.encode2 = amv_encode_picture,
|
|
.close = ff_mpv_encode_end,
|
|
.pix_fmts = (const enum AVPixelFormat[]){
|
|
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_NONE
|
|
},
|
|
.priv_class = &amv_class,
|
|
};
|
|
#endif
|