/*

 * 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"

/**

 * Buffer of JPEG frame data.

 *

 * Optimal Huffman table generation requires the frame data to be loaded into

 * a buffer so that the tables can be computed.

 * There are at most mb_width*mb_height*12*64 of these per frame.

 */

typedef struct MJpegHuffmanCode {

    // 0=DC lum, 1=DC chrom, 2=AC lum, 3=AC chrom

    uint8_t table_id; ///< The Huffman table id associated with the data.

    uint8_t code;     ///< The exponent.

    uint16_t mant;    ///< The mantissa.

} MJpegHuffmanCode;

/* The following is the private context of MJPEG/AMV decoder.

 * Note that when using slice threading only the main thread's

 * MPVEncContext is followed by a MjpegContext; the other threads

 * can access this shared context via MPVEncContext.mjpeg. */

typedef struct MJPEGEncContext {

    MPVMainEncContext 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(MPVEncContext *const s)

{

    ff_mjpeg_encode_picture_header(s->c.avctx, &s->pb, s->c.cur_pic.ptr->f, s->mjpeg_ctx,

                                   s->c.intra_scantable.permutated, 0,

                                   s->c.intra_matrix, s->c.chroma_intra_matrix,

                                   s->c.slice_context_count > 1);

    s->esc_pos = put_bytes_count(&s->pb, 0);

    for (int i = 1; i < s->c.slice_context_count; i++)

        s->c.enc_contexts[i]->esc_pos = 0;

}

static int mjpeg_amv_encode_picture_header(MPVMainEncContext *const m)

{

    MJPEGEncContext *const m2 = (MJPEGEncContext*)m;

    MPVEncContext *const s = &m->s;

    av_assert2(s->mjpeg_ctx == &m2->mjpeg);

    /* s->huffman == HUFFMAN_TABLE_OPTIMAL can only be true for MJPEG. */

    if (!CONFIG_MJPEG_ENCODER || m2->mjpeg.huffman != HUFFMAN_TABLE_OPTIMAL)

        mjpeg_encode_picture_header(s);

    return 0;

}

#if CONFIG_MJPEG_ENCODER

/**

 * Encodes and outputs the entire frame in the JPEG format.

 *

 * @param main The MPVMainEncContext.

 */

static void mjpeg_encode_picture_frame(MPVMainEncContext *const main)

{

    MPVEncContext *const s = &main->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;

    main->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 MPVEncContext.

 * @return int Error code, 0 if successful.

 */

int ff_mjpeg_encode_stuffing(MPVEncContext *const s)

{

    MJpegContext *const m = s->mjpeg_ctx;

    PutBitContext *pbc = &s->pb;

    int mb_y = s->c.mb_y - !s->c.mb_x;

    int ret;

#if CONFIG_MJPEG_ENCODER

    if (m->huffman == HUFFMAN_TABLE_OPTIMAL) {

        /* HUFFMAN_TABLE_OPTIMAL is incompatible with slice threading,

         * therefore the following cast is allowed. */

        MPVMainEncContext *const main = (MPVMainEncContext*)s;

        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(main);

    }

#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->c.avctx, AV_LOG_ERROR, "Buffer reallocation failed\n");

        goto fail;

    }

    ff_mjpeg_escape_FF(pbc, s->esc_pos);

    if (s->c.slice_context_count > 1 && mb_y < s->c.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->c.intra_dc_precision;

    return ret;

}

static int alloc_huffman(MJPEGEncContext *const m2)

{

    MJpegContext   *const m = &m2->mjpeg;

    MPVEncContext *const s = &m2->mpeg.s;

    static const char blocks_per_mb[] = {

        [CHROMA_420] = 6, [CHROMA_422] = 8, [CHROMA_444] = 12

    };

    size_t num_blocks;

    // Make sure we have enough space to hold this frame.

    num_blocks = s->c.mb_num * blocks_per_mb[s->c.chroma_format];

    m->huff_buffer = av_malloc_array(num_blocks,

                                     64 /* codes per MB */ * sizeof(MJpegHuffmanCode));

    if (!m->huff_buffer)

        return AVERROR(ENOMEM);

    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 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 mjpeg_encode_coef(MJpegContext *s, uint8_t table_id, int val, int run)

{

    int mant, code;

    if (val == 0) {

        av_assert0(run == 0);

        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;

        mjpeg_encode_code(s, table_id, code);

    }

}

/**

 * Add the block's data into the JPEG buffer.

 *

 * @param s The MPVEncContext that contains the JPEG buffer.

 * @param block The block.

 * @param n The block's index or number.

 */

static void record_block(MPVEncContext *const 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];

    mjpeg_encode_coef(m, table_id, val, 0);

    s->last_dc[component] = dc;

    /* AC coefs */

    run = 0;

    last_index = s->c.block_last_index[n];

    table_id |= 2;

    for(i=1;i<=last_index;i++) {

        j = s->c.intra_scantable.permutated[i];

        val = block[j];

        if (val == 0) {

            run++;

        } else {

            while (run >= 16) {

                mjpeg_encode_code(m, table_id, 0xf0);

                run -= 16;

            }

            mjpeg_encode_coef(m, table_id, val, run);

            run = 0;

        }

    }

    /* output EOB only if not already 64 values */

    if (last_index < 63 || run != 0)

        mjpeg_encode_code(m, table_id, 0);

}

static void encode_block(MPVEncContext *const s, int16_t block[], int n)

{

    int mant, nbits, code, i, j;

    int component, dc, run, last_index, val;

    const MJpegContext *const m = s->mjpeg_ctx;

    const uint16_t *huff_code_ac;

    const uint8_t  *huff_size_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->c.block_last_index[n];

    for(i=1;i<=last_index;i++) {

        j = s->c.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]);

}

static void mjpeg_record_mb(MPVEncContext *const s, int16_t block[][64],

                            int unused_x, int unused_y)

{

    if (s->c.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->c.mb_x+8 < s->c.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 (int i = 0; i < 5; i++)

            record_block(s, block[i], i);

        if (s->c.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);

        }

    }

}

static void mjpeg_encode_mb(MPVEncContext *const s, int16_t block[][64],

                            int unused_x, int unused_y)

{

    if (s->c.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->c.mb_x + 8 < s->c.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 (int i = 0; i < 5; i++)

            encode_block(s, block[i], i);

        if (s->c.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);

}

static av_cold int mjpeg_encode_init(AVCodecContext *avctx)

{

    MJPEGEncContext *const m2 = avctx->priv_data;

    MJpegContext    *const m  = &m2->mjpeg;

    MPVEncContext  *const s  = &m2->mpeg.s;

    int ret;

    s->mjpeg_ctx = m;

    m2->mpeg.encode_picture_header = mjpeg_amv_encode_picture_header;

    // May be overridden below

    s->encode_mb                   = mjpeg_encode_mb;

    if (s->mpv_flags & FF_MPV_FLAG_QP_RD) {

        // Used to produce garbage with MJPEG.

        av_log(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(avctx);

    if (ret < 0)

        return ret;

    if (avctx->width > 65500 || avctx->height > 65500) {

        av_log(avctx, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n");

        return AVERROR(EINVAL);

    }

    // 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->min_qcoeff = -1023;

    s->max_qcoeff =  1023;

    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;

    ret = ff_mpv_encode_init(avctx);

    if (ret < 0)

        return ret;

    // Buffers start out empty.

    m->huff_ncode = 0;

    if (s->c.slice_context_count > 1)

        m->huffman = HUFFMAN_TABLE_DEFAULT;

    if (m->huffman == HUFFMAN_TABLE_OPTIMAL) {

        // If we are here, we have only one slice_context. So no loop necessary.

        s->encode_mb = mjpeg_record_mb;

        return alloc_huffman(m2);

    }

    return 0;

}

#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)

{

    MPVEncContext *const 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->c.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[] = {

#define AMV_OPTIONS_OFFSET 4

{ "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 },

FF_MPV_COMMON_OPTS

{ 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,

};

static int mjpeg_get_supported_config(const AVCodecContext *avctx,

                                      const AVCodec *codec,

                                      enum AVCodecConfig config,

                                      unsigned flags, const void **out,

                                      int *out_num)

{

    if (config == AV_CODEC_CONFIG_COLOR_RANGE) {

        static const enum AVColorRange mjpeg_ranges[] = {

            AVCOL_RANGE_MPEG, AVCOL_RANGE_JPEG, AVCOL_RANGE_UNSPECIFIED,

        };

        int strict = avctx ? avctx->strict_std_compliance : 0;

        int index = strict > FF_COMPLIANCE_UNOFFICIAL ? 1 : 0;

        *out = &mjpeg_ranges[index];

        *out_num = FF_ARRAY_ELEMS(mjpeg_ranges) - index - 1;

        return 0;

    }

    return ff_default_get_supported_config(avctx, codec, config, flags, out, out_num);

}

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           = mjpeg_encode_init,

    FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),

    .close          = mjpeg_encode_close,

    .p.capabilities = AV_CODEC_CAP_DR1 |

                      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,

    CODEC_PIXFMTS(AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,

                  AV_PIX_FMT_YUV420P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV444P),

    .p.priv_class   = &mjpeg_class,

    .p.profiles     = NULL_IF_CONFIG_SMALL(ff_mjpeg_profiles),

    .get_supported_config = mjpeg_get_supported_config,

};

#endif

#if CONFIG_AMV_ENCODER

static const AVClass amv_class = {

    .class_name = "amv encoder",

    .item_name  = av_default_item_name,

    .option     = options + AMV_OPTIONS_OFFSET,

    .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,

    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,

    .priv_data_size = sizeof(MJPEGEncContext),

    .init           = mjpeg_encode_init,

    FF_CODEC_ENCODE_CB(amv_encode_picture),

    .close          = mjpeg_encode_close,

    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,

    CODEC_PIXFMTS(AV_PIX_FMT_YUVJ420P),

    .color_ranges   = AVCOL_RANGE_JPEG,

    .p.priv_class   = &amv_class,

};

#endif