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ffmpeg/libavcodec/mjpegenc.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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/*
* 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 "config_components.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "jpegtables.h"
#include "mjpegenc_common.h"
#include "mjpegenc_huffman.h"
#include "mpegvideo.h"
#include "mjpeg.h"
#include "mjpegenc.h"
#include "mpegvideoenc.h"
#include "profiles.h"
/* The following is the private context of MJPEG/AMV decoder.
* Note that when using slice threading only the main thread's
* MpegEncContext is followed by a MjpegContext; the other threads
* can access this shared context via MpegEncContext.mjpeg. */
typedef struct MJPEGEncContext {
MpegEncContext mpeg;
MJpegContext mjpeg;
} MJPEGEncContext;
static av_cold void init_uni_ac_vlc(const uint8_t huff_size_ac[256],
uint8_t *uni_ac_vlc_len)
{
for (int i = 0; i < 128; i++) {
int level = i - 64;
if (!level)
continue;
for (int 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
}
}
}
static void mjpeg_encode_picture_header(MpegEncContext *s)
{
ff_mjpeg_encode_picture_header(s->avctx, &s->pb, s->picture->f, s->mjpeg_ctx,
s->intra_scantable.permutated, 0,
s->intra_matrix, s->chroma_intra_matrix,
s->slice_context_count > 1);
s->esc_pos = put_bytes_count(&s->pb, 0);
for (int i = 1; i < s->slice_context_count; i++)
s->thread_context[i]->esc_pos = 0;
}
void ff_mjpeg_amv_encode_picture_header(MpegEncContext *s)
{
MJPEGEncContext *const m = (MJPEGEncContext*)s;
av_assert2(s->mjpeg_ctx == &m->mjpeg);
/* s->huffman == HUFFMAN_TABLE_OPTIMAL can only be true for MJPEG. */
if (!CONFIG_MJPEG_ENCODER || m->mjpeg.huffman != HUFFMAN_TABLE_OPTIMAL)
mjpeg_encode_picture_header(s);
}
#if CONFIG_MJPEG_ENCODER
/**
* Encodes and outputs the entire frame in the JPEG format.
*
* @param s The MpegEncContext.
*/
static void mjpeg_encode_picture_frame(MpegEncContext *s)
{
int nbits, code, table_id;
MJpegContext *m = s->mjpeg_ctx;
uint8_t *huff_size[4] = { m->huff_size_dc_luminance,
m->huff_size_dc_chrominance,
m->huff_size_ac_luminance,
m->huff_size_ac_chrominance };
uint16_t *huff_code[4] = { m->huff_code_dc_luminance,
m->huff_code_dc_chrominance,
m->huff_code_ac_luminance,
m->huff_code_ac_chrominance };
size_t total_bits = 0;
size_t bytes_needed;
s->header_bits = get_bits_diff(s);
// Estimate the total size first
for (int i = 0; i < m->huff_ncode; i++) {
table_id = m->huff_buffer[i].table_id;
code = m->huff_buffer[i].code;
nbits = code & 0xf;
total_bits += huff_size[table_id][code] + nbits;
}
bytes_needed = (total_bits + 7) / 8;
ff_mpv_reallocate_putbitbuffer(s, bytes_needed, bytes_needed);
for (int i = 0; i < m->huff_ncode; i++) {
table_id = m->huff_buffer[i].table_id;
code = m->huff_buffer[i].code;
nbits = code & 0xf;
put_bits(&s->pb, huff_size[table_id][code], huff_code[table_id][code]);
if (nbits != 0) {
put_sbits(&s->pb, nbits, m->huff_buffer[i].mant);
}
}
m->huff_ncode = 0;
s->i_tex_bits = get_bits_diff(s);
}
/**
* Builds all 4 optimal Huffman tables.
*
* Uses the data stored in the JPEG buffer to compute the tables.
* Stores the Huffman tables in the bits_* and val_* arrays in the MJpegContext.
*
* @param m MJpegContext containing the JPEG buffer.
*/
static void mjpeg_build_optimal_huffman(MJpegContext *m)
{
MJpegEncHuffmanContext dc_luminance_ctx;
MJpegEncHuffmanContext dc_chrominance_ctx;
MJpegEncHuffmanContext ac_luminance_ctx;
MJpegEncHuffmanContext ac_chrominance_ctx;
MJpegEncHuffmanContext *ctx[4] = { &dc_luminance_ctx,
&dc_chrominance_ctx,
&ac_luminance_ctx,
&ac_chrominance_ctx };
for (int i = 0; i < 4; i++)
ff_mjpeg_encode_huffman_init(ctx[i]);
for (int i = 0; i < m->huff_ncode; i++) {
int table_id = m->huff_buffer[i].table_id;
int code = m->huff_buffer[i].code;
ff_mjpeg_encode_huffman_increment(ctx[table_id], code);
}
ff_mjpeg_encode_huffman_close(&dc_luminance_ctx,
m->bits_dc_luminance,
m->val_dc_luminance, 12);
ff_mjpeg_encode_huffman_close(&dc_chrominance_ctx,
m->bits_dc_chrominance,
m->val_dc_chrominance, 12);
ff_mjpeg_encode_huffman_close(&ac_luminance_ctx,
m->bits_ac_luminance,
m->val_ac_luminance, 256);
ff_mjpeg_encode_huffman_close(&ac_chrominance_ctx,
m->bits_ac_chrominance,
m->val_ac_chrominance, 256);
ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance,
m->huff_code_dc_luminance,
m->bits_dc_luminance,
m->val_dc_luminance);
ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance,
m->huff_code_dc_chrominance,
m->bits_dc_chrominance,
m->val_dc_chrominance);
ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance,
m->huff_code_ac_luminance,
m->bits_ac_luminance,
m->val_ac_luminance);
ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance,
m->huff_code_ac_chrominance,
m->bits_ac_chrominance,
m->val_ac_chrominance);
}
#endif
/**
* Writes the complete JPEG frame when optimal huffman tables are enabled,
* otherwise writes the stuffing.
*
* Header + values + stuffing.
*
* @param s The MpegEncContext.
* @return int Error code, 0 if successful.
*/
int ff_mjpeg_encode_stuffing(MpegEncContext *s)
{
MJpegContext *const m = s->mjpeg_ctx;
PutBitContext *pbc = &s->pb;
int mb_y = s->mb_y - !s->mb_x;
int ret;
#if CONFIG_MJPEG_ENCODER
if (m->huffman == HUFFMAN_TABLE_OPTIMAL) {
mjpeg_build_optimal_huffman(m);
// Replace the VLCs with the optimal ones.
// The default ones may be used for trellis during quantization.
init_uni_ac_vlc(m->huff_size_ac_luminance, m->uni_ac_vlc_len);
init_uni_ac_vlc(m->huff_size_ac_chrominance, m->uni_chroma_ac_vlc_len);
s->intra_ac_vlc_length =
s->intra_ac_vlc_last_length = m->uni_ac_vlc_len;
s->intra_chroma_ac_vlc_length =
s->intra_chroma_ac_vlc_last_length = m->uni_chroma_ac_vlc_len;
mjpeg_encode_picture_header(s);
mjpeg_encode_picture_frame(s);
}
#endif
ret = ff_mpv_reallocate_putbitbuffer(s, put_bits_count(&s->pb) / 8 + 100,
put_bits_count(&s->pb) / 4 + 1000);
if (ret < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Buffer reallocation failed\n");
goto fail;
}
ff_mjpeg_escape_FF(pbc, s->esc_pos);
if (s->slice_context_count > 1 && mb_y < s->mb_height - 1)
put_marker(pbc, RST0 + (mb_y&7));
s->esc_pos = put_bytes_count(pbc, 0);
fail:
for (int i = 0; i < 3; i++)
s->last_dc[i] = 128 << s->intra_dc_precision;
return ret;
}
static int alloc_huffman(MpegEncContext *s)
{
MJpegContext *m = s->mjpeg_ctx;
size_t num_mbs, num_blocks, num_codes;
int blocks_per_mb;
// We need to init this here as the mjpeg init is called before the common init,
s->mb_width = (s->width + 15) / 16;
s->mb_height = (s->height + 15) / 16;
switch (s->chroma_format) {
case CHROMA_420: blocks_per_mb = 6; break;
case CHROMA_422: blocks_per_mb = 8; break;
case CHROMA_444: blocks_per_mb = 12; break;
default: av_assert0(0);
};
// Make sure we have enough space to hold this frame.
num_mbs = s->mb_width * s->mb_height;
num_blocks = num_mbs * blocks_per_mb;
num_codes = num_blocks * 64;
m->huff_buffer = av_malloc_array(num_codes, sizeof(MJpegHuffmanCode));
if (!m->huff_buffer)
return AVERROR(ENOMEM);
return 0;
}
av_cold int ff_mjpeg_encode_init(MpegEncContext *s)
{
MJpegContext *const m = &((MJPEGEncContext*)s)->mjpeg;
int ret, use_slices;
s->mjpeg_ctx = m;
use_slices = s->avctx->slices > 0 ? s->avctx->slices > 1 :
(s->avctx->active_thread_type & FF_THREAD_SLICE) &&
s->avctx->thread_count > 1;
if (s->codec_id == AV_CODEC_ID_AMV || use_slices)
m->huffman = HUFFMAN_TABLE_DEFAULT;
if (s->mpv_flags & FF_MPV_FLAG_QP_RD) {
// Used to produce garbage with MJPEG.
av_log(s->avctx, AV_LOG_ERROR,
"QP RD is no longer compatible with MJPEG or AMV\n");
return AVERROR(EINVAL);
}
/* The following check is automatically true for AMV,
* but it doesn't hurt either. */
ret = ff_mjpeg_encode_check_pix_fmt(s->avctx);
if (ret < 0)
return ret;
if (s->width > 65500 || s->height > 65500) {
av_log(s, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n");
return AVERROR(EINVAL);
}
s->min_qcoeff=-1023;
s->max_qcoeff= 1023;
// Build default Huffman tables.
// These may be overwritten later with more optimal Huffman tables, but
// they are needed at least right now for some processes like trellis.
ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance,
m->huff_code_dc_luminance,
ff_mjpeg_bits_dc_luminance,
ff_mjpeg_val_dc);
ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance,
m->huff_code_dc_chrominance,
ff_mjpeg_bits_dc_chrominance,
ff_mjpeg_val_dc);
ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance,
m->huff_code_ac_luminance,
ff_mjpeg_bits_ac_luminance,
ff_mjpeg_val_ac_luminance);
ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance,
m->huff_code_ac_chrominance,
ff_mjpeg_bits_ac_chrominance,
ff_mjpeg_val_ac_chrominance);
init_uni_ac_vlc(m->huff_size_ac_luminance, m->uni_ac_vlc_len);
init_uni_ac_vlc(m->huff_size_ac_chrominance, m->uni_chroma_ac_vlc_len);
s->intra_ac_vlc_length =
s->intra_ac_vlc_last_length = m->uni_ac_vlc_len;
s->intra_chroma_ac_vlc_length =
s->intra_chroma_ac_vlc_last_length = m->uni_chroma_ac_vlc_len;
// Buffers start out empty.
m->huff_ncode = 0;
if (m->huffman == HUFFMAN_TABLE_OPTIMAL)
return alloc_huffman(s);
return 0;
}
static av_cold int mjpeg_encode_close(AVCodecContext *avctx)
{
MJPEGEncContext *const mjpeg = avctx->priv_data;
av_freep(&mjpeg->mjpeg.huff_buffer);
ff_mpv_encode_end(avctx);
return 0;
}
/**
* Add code and table_id to the JPEG buffer.
*
* @param s The MJpegContext which contains the JPEG buffer.
* @param table_id Which Huffman table the code belongs to.
* @param code The encoded exponent of the coefficients and the run-bits.
*/
static inline void ff_mjpeg_encode_code(MJpegContext *s, uint8_t table_id, int code)
{
MJpegHuffmanCode *c = &s->huff_buffer[s->huff_ncode++];
c->table_id = table_id;
c->code = code;
}
/**
* Add the coefficient's data to the JPEG buffer.
*
* @param s The MJpegContext which contains the JPEG buffer.
* @param table_id Which Huffman table the code belongs to.
* @param val The coefficient.
* @param run The run-bits.
*/
static void ff_mjpeg_encode_coef(MJpegContext *s, uint8_t table_id, int val, int run)
{
int mant, code;
if (val == 0) {
av_assert0(run == 0);
ff_mjpeg_encode_code(s, table_id, 0);
} else {
mant = val;
if (val < 0) {
val = -val;
mant--;
}
code = (run << 4) | (av_log2_16bit(val) + 1);
s->huff_buffer[s->huff_ncode].mant = mant;
ff_mjpeg_encode_code(s, table_id, code);
}
}
/**
* Add the block's data into the JPEG buffer.
*
* @param s The MpegEncContext that contains the JPEG buffer.
* @param block The block.
* @param n The block's index or number.
*/
static void record_block(MpegEncContext *s, int16_t *block, int n)
{
int i, j, table_id;
int component, dc, last_index, val, run;
MJpegContext *m = s->mjpeg_ctx;
/* DC coef */
component = (n <= 3 ? 0 : (n&1) + 1);
table_id = (n <= 3 ? 0 : 1);
dc = block[0]; /* overflow is impossible */
val = dc - s->last_dc[component];
ff_mjpeg_encode_coef(m, table_id, val, 0);
s->last_dc[component] = dc;
/* AC coefs */
run = 0;
last_index = s->block_last_index[n];
table_id |= 2;
for(i=1;i<=last_index;i++) {
j = s->intra_scantable.permutated[i];
val = block[j];
if (val == 0) {
run++;
} else {
while (run >= 16) {
ff_mjpeg_encode_code(m, table_id, 0xf0);
run -= 16;
}
ff_mjpeg_encode_coef(m, table_id, val, run);
run = 0;
}
}
/* output EOB only if not already 64 values */
if (last_index < 63 || run != 0)
ff_mjpeg_encode_code(m, table_id, 0);
}
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->mjpeg_ctx->huffman == HUFFMAN_TABLE_OPTIMAL) {
if (s->chroma_format == CHROMA_444) {
record_block(s, block[0], 0);
record_block(s, block[2], 2);
record_block(s, block[4], 4);
record_block(s, block[8], 8);
record_block(s, block[5], 5);
record_block(s, block[9], 9);
if (16*s->mb_x+8 < s->width) {
record_block(s, block[1], 1);
record_block(s, block[3], 3);
record_block(s, block[6], 6);
record_block(s, block[10], 10);
record_block(s, block[7], 7);
record_block(s, block[11], 11);
}
} else {
for(i=0;i<5;i++) {
record_block(s, block[i], i);
}
if (s->chroma_format == CHROMA_420) {
record_block(s, block[5], 5);
} else {
record_block(s, block[6], 6);
record_block(s, block[5], 5);
record_block(s, block[7], 7);
}
}
} else {
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);
}
}
#if CONFIG_AMV_ENCODER
// 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_v_shift = 1; /* AMV is 420-only */
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;
}
#endif
#define OFFSET(x) offsetof(MJPEGEncContext, mjpeg.x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
FF_MPV_COMMON_OPTS
{ "huffman", "Huffman table strategy", OFFSET(huffman), AV_OPT_TYPE_INT, { .i64 = HUFFMAN_TABLE_OPTIMAL }, 0, NB_HUFFMAN_TABLE_OPTION - 1, VE, .unit = "huffman" },
{ "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_DEFAULT }, INT_MIN, INT_MAX, VE, .unit = "huffman" },
{ "optimal", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_OPTIMAL }, INT_MIN, INT_MAX, VE, .unit = "huffman" },
{ "force_duplicated_matrix", "Always write luma and chroma matrix for mjpeg, useful for rtp streaming.", OFFSET(force_duplicated_matrix), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, VE },
{ NULL},
};
#if CONFIG_MJPEG_ENCODER
static const AVClass mjpeg_class = {
.class_name = "mjpeg encoder",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFCodec ff_mjpeg_encoder = {
.p.name = "mjpeg",
CODEC_LONG_NAME("MJPEG (Motion JPEG)"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_MJPEG,
.priv_data_size = sizeof(MJPEGEncContext),
.init = ff_mpv_encode_init,
FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
.close = mjpeg_encode_close,
.p.capabilities = AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_FRAME_THREADS |
AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP | FF_CODEC_CAP_ICC_PROFILES,
.p.pix_fmts = (const enum AVPixelFormat[]) {
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
AV_PIX_FMT_NONE
},
.p.priv_class = &mjpeg_class,
.p.profiles = NULL_IF_CONFIG_SMALL(ff_mjpeg_profiles),
};
#endif
#if CONFIG_AMV_ENCODER
static const AVClass amv_class = {
.class_name = "amv encoder",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFCodec ff_amv_encoder = {
.p.name = "amv",
CODEC_LONG_NAME("AMV Video"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_AMV,
.priv_data_size = sizeof(MJPEGEncContext),
.init = ff_mpv_encode_init,
FF_CODEC_ENCODE_CB(amv_encode_picture),
.close = mjpeg_encode_close,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
.p.pix_fmts = (const enum AVPixelFormat[]) {
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_NONE
},
.p.priv_class = &amv_class,
.p.capabilities = AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
};
#endif
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