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FFmpeg/libavcodec/vaapi_encode_mpeg2.c

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  1. /*

  2.  * This file is part of FFmpeg.

  3.  *

  4.  * FFmpeg is free software; you can redistribute it and/or

  5.  * modify it under the terms of the GNU Lesser General Public

  6.  * License as published by the Free Software Foundation; either

  7.  * version 2.1 of the License, or (at your option) any later version.

  8.  *

  9.  * FFmpeg is distributed in the hope that it will be useful,

  10.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  11.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  12.  * Lesser General Public License for more details.

  13.  *

  14.  * You should have received a copy of the GNU Lesser General Public

  15.  * License along with FFmpeg; if not, write to the Free Software

  16.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  17.  */

  18. 

  19. #include <va/va.h>

  20. #include <va/va_enc_mpeg2.h>

  21. 

  22. #include "libavutil/avassert.h"

  23. 

  24. #include "avcodec.h"

  25. #include "cbs.h"

  26. #include "cbs_mpeg2.h"

  27. #include "mpeg12.h"

  28. #include "vaapi_encode.h"

  29. 

  30. typedef struct VAAPIEncodeMPEG2Context {

  31.     VAAPIEncodeContext common;

  32. 

  33.     // User options.

  34.     int profile;

  35.     int level;

  36. 

  37.     // Derived settings.

  38.     int quant_i;

  39.     int quant_p;

  40.     int quant_b;

  41. 

  42.     unsigned int bit_rate;

  43.     unsigned int vbv_buffer_size;

  44. 

  45.     AVRational frame_rate;

  46. 

  47.     unsigned int f_code_horizontal;

  48.     unsigned int f_code_vertical;

  49. 

  50.     // Stream state.

  51.     int64_t last_i_frame;

  52. 

  53.     // Writer structures.

  54.     MPEG2RawSequenceHeader sequence_header;

  55.     MPEG2RawExtensionData  sequence_extension;

  56.     MPEG2RawExtensionData  sequence_display_extension;

  57.     MPEG2RawGroupOfPicturesHeader gop_header;

  58.     MPEG2RawPictureHeader  picture_header;

  59.     MPEG2RawExtensionData  picture_coding_extension;

  60. 

  61.     CodedBitstreamContext *cbc;

  62.     CodedBitstreamFragment current_fragment;

  63. } VAAPIEncodeMPEG2Context;

  64. 

  65. 

  66. static int vaapi_encode_mpeg2_write_fragment(AVCodecContext *avctx,

  67.                                              char *data, size_t *data_len,

  68.                                              CodedBitstreamFragment *frag)

  69. {

  70.     VAAPIEncodeMPEG2Context *priv = avctx->priv_data;

  71.     int err;

  72. 

  73.     err = ff_cbs_write_fragment_data(priv->cbc, frag);

  74.     if (err < 0) {

  75.         av_log(avctx, AV_LOG_ERROR, "Failed to write packed header.\n");

  76.         return err;

  77.     }

  78. 

  79.     if (*data_len < 8 * frag->data_size - frag->data_bit_padding) {

  80.         av_log(avctx, AV_LOG_ERROR, "Access unit too large: "

  81.                "%zu < %zu.\n", *data_len,

  82.                8 * frag->data_size - frag->data_bit_padding);

  83.         return AVERROR(ENOSPC);

  84.     }

  85. 

  86.     memcpy(data, frag->data, frag->data_size);

  87.     *data_len = 8 * frag->data_size - frag->data_bit_padding;

  88. 

  89.     return 0;

  90. }

  91. 

  92. static int vaapi_encode_mpeg2_add_header(AVCodecContext *avctx,

  93.                                          CodedBitstreamFragment *frag,

  94.                                          int type, void *header)

  95. {

  96.     VAAPIEncodeMPEG2Context *priv = avctx->priv_data;

  97.     int err;

  98. 

  99.     err = ff_cbs_insert_unit_content(priv->cbc, frag, -1, type, header, NULL);

  100.     if (err < 0) {

  101.         av_log(avctx, AV_LOG_ERROR, "Failed to add header: "

  102.                "type = %d.\n", type);

  103.         return err;

  104.     }

  105. 

  106.     return 0;

  107. }

  108. 

  109. static int vaapi_encode_mpeg2_write_sequence_header(AVCodecContext *avctx,

  110.                                                     char *data, size_t *data_len)

  111. {

  112.     VAAPIEncodeMPEG2Context *priv = avctx->priv_data;

  113.     CodedBitstreamFragment  *frag = &priv->current_fragment;

  114.     int err;

  115. 

  116.     err = vaapi_encode_mpeg2_add_header(avctx, frag, MPEG2_START_SEQUENCE_HEADER,

  117.                                         &priv->sequence_header);

  118.     if (err < 0)

  119.         goto fail;

  120. 

  121.     err = vaapi_encode_mpeg2_add_header(avctx, frag, MPEG2_START_EXTENSION,

  122.                                         &priv->sequence_extension);

  123.     if (err < 0)

  124.         goto fail;

  125. 

  126.     err = vaapi_encode_mpeg2_add_header(avctx, frag, MPEG2_START_EXTENSION,

  127.                                         &priv->sequence_display_extension);

  128.     if (err < 0)

  129.         goto fail;

  130. 

  131.     err = vaapi_encode_mpeg2_add_header(avctx, frag, MPEG2_START_GROUP,

  132.                                         &priv->gop_header);

  133.     if (err < 0)

  134.         goto fail;

  135. 

  136.     err = vaapi_encode_mpeg2_write_fragment(avctx, data, data_len, frag);

  137. fail:

  138.     ff_cbs_fragment_reset(priv->cbc, frag);

  139.     return 0;

  140. }

  141. 

  142. static int vaapi_encode_mpeg2_write_picture_header(AVCodecContext *avctx,

  143.                                                    VAAPIEncodePicture *pic,

  144.                                                    char *data, size_t *data_len)

  145. {

  146.     VAAPIEncodeMPEG2Context *priv = avctx->priv_data;

  147.     CodedBitstreamFragment  *frag = &priv->current_fragment;

  148.     int err;

  149. 

  150.     err = vaapi_encode_mpeg2_add_header(avctx, frag, MPEG2_START_PICTURE,

  151.                                         &priv->picture_header);

  152.     if (err < 0)

  153.         goto fail;

  154. 

  155.     err = vaapi_encode_mpeg2_add_header(avctx, frag, MPEG2_START_EXTENSION,

  156.                                         &priv->picture_coding_extension);

  157.     if (err < 0)

  158.         goto fail;

  159. 

  160.     err = vaapi_encode_mpeg2_write_fragment(avctx, data, data_len, frag);

  161. fail:

  162.     ff_cbs_fragment_reset(priv->cbc, frag);

  163.     return 0;

  164. }

  165. 

  166. static int vaapi_encode_mpeg2_init_sequence_params(AVCodecContext *avctx)

  167. {

  168.     VAAPIEncodeContext                 *ctx = avctx->priv_data;

  169.     VAAPIEncodeMPEG2Context           *priv = avctx->priv_data;

  170.     MPEG2RawSequenceHeader              *sh = &priv->sequence_header;

  171.     MPEG2RawSequenceExtension           *se = &priv->sequence_extension.data.sequence;

  172.     MPEG2RawSequenceDisplayExtension   *sde = &priv->sequence_display_extension.data.sequence_display;

  173.     MPEG2RawGroupOfPicturesHeader     *goph = &priv->gop_header;

  174.     MPEG2RawPictureHeader               *ph = &priv->picture_header;

  175.     MPEG2RawPictureCodingExtension     *pce = &priv->picture_coding_extension.data.picture_coding;

  176.     VAEncSequenceParameterBufferMPEG2 *vseq = ctx->codec_sequence_params;

  177.     VAEncPictureParameterBufferMPEG2  *vpic = ctx->codec_picture_params;

  178.     int code, ext_n, ext_d;

  179. 

  180.     memset(sh,   0, sizeof(*sh));

  181.     memset(se,   0, sizeof(*se));

  182.     memset(sde,  0, sizeof(*sde));

  183.     memset(goph, 0, sizeof(*goph));

  184.     memset(ph,   0, sizeof(*ph));

  185.     memset(pce,  0, sizeof(*pce));

  186. 

  187. 

  188.     if (ctx->va_bit_rate > 0) {

  189.         priv->bit_rate = (ctx->va_bit_rate + 399) / 400;

  190.     } else {

  191.         // Unknown (not a bitrate-targetting mode), so just use the

  192.         // highest value.

  193.         priv->bit_rate = 0x3fffffff;

  194.     }

  195.     if (avctx->rc_buffer_size > 0) {

  196.         priv->vbv_buffer_size = (avctx->rc_buffer_size + (1 << 14) - 1) >> 14;

  197.     } else {

  198.         // Unknown, so guess a value from the bitrate.

  199.         priv->vbv_buffer_size = priv->bit_rate >> 14;

  200.     }

  201. 

  202.     switch (avctx->level) {

  203.     case 4: // High.

  204.     case 6: // High 1440.

  205.         priv->f_code_horizontal = 9;

  206.         priv->f_code_vertical   = 5;

  207.         break;

  208.     case 8: // Main.

  209.         priv->f_code_horizontal = 8;

  210.         priv->f_code_vertical   = 5;

  211.         break;

  212.     case 10: // Low.

  213.     default:

  214.         priv->f_code_horizontal = 7;

  215.         priv->f_code_vertical   = 4;

  216.         break;

  217.     }

  218. 

  219. 

  220.     // Sequence header

  221. 

  222.     sh->sequence_header_code = MPEG2_START_SEQUENCE_HEADER;

  223. 

  224.     sh->horizontal_size_value = avctx->width  & 0xfff;

  225.     sh->vertical_size_value   = avctx->height & 0xfff;

  226. 

  227.     if (avctx->sample_aspect_ratio.num != 0 &&

  228.         avctx->sample_aspect_ratio.den != 0) {

  229.         AVRational dar = av_div_q(avctx->sample_aspect_ratio,

  230.                                   (AVRational) { avctx->width, avctx->height });

  231. 

  232.         if (av_cmp_q(avctx->sample_aspect_ratio, (AVRational) { 1, 1 }) == 0) {

  233.             sh->aspect_ratio_information = 1;

  234.         } else if (av_cmp_q(dar, (AVRational) { 3, 4 }) == 0) {

  235.             sh->aspect_ratio_information = 2;

  236.         } else if (av_cmp_q(dar, (AVRational) { 9, 16 }) == 0) {

  237.             sh->aspect_ratio_information = 3;

  238.         } else if (av_cmp_q(dar, (AVRational) { 100, 221 }) == 0) {

  239.             sh->aspect_ratio_information = 4;

  240.         } else {

  241.             av_log(avctx, AV_LOG_WARNING, "Sample aspect ratio %d:%d is not "

  242.                    "representable, signalling square pixels instead.\n",

  243.                    avctx->sample_aspect_ratio.num,

  244.                    avctx->sample_aspect_ratio.den);

  245.             sh->aspect_ratio_information = 1;

  246.         }

  247.     } else {

  248.         // Unknown - assume square pixels.

  249.         sh->aspect_ratio_information = 1;

  250.     }

  251. 

  252.     if (avctx->framerate.num > 0 && avctx->framerate.den > 0)

  253.         priv->frame_rate = avctx->framerate;

  254.     else

  255.         priv->frame_rate = av_inv_q(avctx->time_base);

  256.     ff_mpeg12_find_best_frame_rate(priv->frame_rate,

  257.                                    &code, &ext_n, &ext_d, 0);

  258.     sh->frame_rate_code = code;

  259. 

  260.     sh->bit_rate_value        = priv->bit_rate & 0x3ffff;

  261.     sh->vbv_buffer_size_value = priv->vbv_buffer_size & 0x3ff;

  262. 

  263.     sh->constrained_parameters_flag     = 0;

  264.     sh->load_intra_quantiser_matrix     = 0;

  265.     sh->load_non_intra_quantiser_matrix = 0;

  266. 

  267. 

  268.     // Sequence extension

  269. 

  270.     priv->sequence_extension.extension_start_code = MPEG2_START_EXTENSION;

  271.     priv->sequence_extension.extension_start_code_identifier =

  272.         MPEG2_EXTENSION_SEQUENCE;

  273. 

  274.     se->profile_and_level_indication = avctx->profile << 4 | avctx->level;

  275.     se->progressive_sequence = 1;

  276.     se->chroma_format        = 1;

  277. 

  278.     se->horizontal_size_extension = avctx->width  >> 12;

  279.     se->vertical_size_extension   = avctx->height >> 12;

  280. 

  281.     se->bit_rate_extension        = priv->bit_rate >> 18;

  282.     se->vbv_buffer_size_extension = priv->vbv_buffer_size >> 10;

  283.     se->low_delay                 = ctx->b_per_p == 0;

  284. 

  285.     se->frame_rate_extension_n = ext_n;

  286.     se->frame_rate_extension_d = ext_d;

  287. 

  288. 

  289.     // Sequence display extension

  290. 

  291.     priv->sequence_display_extension.extension_start_code =

  292.         MPEG2_START_EXTENSION;

  293.     priv->sequence_display_extension.extension_start_code_identifier =

  294.         MPEG2_EXTENSION_SEQUENCE_DISPLAY;

  295. 

  296.     sde->video_format = 5;

  297.     if (avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||

  298.         avctx->color_trc       != AVCOL_TRC_UNSPECIFIED ||

  299.         avctx->colorspace      != AVCOL_SPC_UNSPECIFIED) {

  300.         sde->colour_description       = 1;

  301.         sde->colour_primaries         = avctx->color_primaries;

  302.         sde->transfer_characteristics = avctx->color_trc;

  303.         sde->matrix_coefficients      = avctx->colorspace;

  304.     } else {

  305.         sde->colour_description = 0;

  306.     }

  307. 

  308.     sde->display_horizontal_size = avctx->width;

  309.     sde->display_vertical_size   = avctx->height;

  310. 

  311. 

  312.     // GOP header

  313. 

  314.     goph->group_start_code = MPEG2_START_GROUP;

  315. 

  316.     // Marker bit in the middle of time_code.

  317.     goph->time_code   = 1 << 12;

  318.     goph->closed_gop  = 1;

  319.     goph->broken_link = 0;

  320. 

  321. 

  322.     // Defaults for picture header

  323. 

  324.     ph->picture_start_code = MPEG2_START_PICTURE;

  325. 

  326.     ph->vbv_delay = 0xffff; // Not currently calculated.

  327. 

  328.     ph->full_pel_forward_vector  = 0;

  329.     ph->forward_f_code           = 7;

  330.     ph->full_pel_backward_vector = 0;

  331.     ph->forward_f_code           = 7;

  332. 

  333. 

  334.     // Defaults for picture coding extension

  335. 

  336.     priv->picture_coding_extension.extension_start_code =

  337.         MPEG2_START_EXTENSION;

  338.     priv->picture_coding_extension.extension_start_code_identifier =

  339.         MPEG2_EXTENSION_PICTURE_CODING;

  340. 

  341.     pce->intra_dc_precision         = 0;

  342.     pce->picture_structure          = 3;

  343.     pce->top_field_first            = 0;

  344.     pce->frame_pred_frame_dct       = 1;

  345.     pce->concealment_motion_vectors = 0;

  346.     pce->q_scale_type               = 0;

  347.     pce->intra_vlc_format           = 0;

  348.     pce->alternate_scan             = 0;

  349.     pce->repeat_first_field         = 0;

  350.     pce->progressive_frame          = 1;

  351.     pce->composite_display_flag     = 0;

  352. 

  353. 

  354. 

  355.     *vseq = (VAEncSequenceParameterBufferMPEG2) {

  356.         .intra_period = ctx->gop_size,

  357.         .ip_period    = ctx->b_per_p + 1,

  358. 

  359.         .picture_width  = avctx->width,

  360.         .picture_height = avctx->height,

  361. 

  362.         .bits_per_second          = ctx->va_bit_rate,

  363.         .frame_rate               = av_q2d(priv->frame_rate),

  364.         .aspect_ratio_information = sh->aspect_ratio_information,

  365.         .vbv_buffer_size          = priv->vbv_buffer_size,

  366. 

  367.         .sequence_extension.bits = {

  368.             .profile_and_level_indication = se->profile_and_level_indication,

  369.             .progressive_sequence         = se->progressive_sequence,

  370.             .chroma_format                = se->chroma_format,

  371.             .low_delay                    = se->low_delay,

  372.             .frame_rate_extension_n       = se->frame_rate_extension_n,

  373.             .frame_rate_extension_d       = se->frame_rate_extension_d,

  374.         },

  375. 

  376.         .new_gop_header = 1,

  377.         .gop_header.bits = {

  378.             .time_code   = goph->time_code,

  379.             .closed_gop  = goph->closed_gop,

  380.             .broken_link = goph->broken_link,

  381.         },

  382.     };

  383. 

  384.     *vpic = (VAEncPictureParameterBufferMPEG2) {

  385.         .forward_reference_picture  = VA_INVALID_ID,

  386.         .backward_reference_picture = VA_INVALID_ID,

  387.         .reconstructed_picture      = VA_INVALID_ID,

  388.         .coded_buf                  = VA_INVALID_ID,

  389. 

  390.         .vbv_delay = 0xffff,

  391.         .f_code    = { { 15, 15 }, { 15, 15 } },

  392. 

  393.         .picture_coding_extension.bits = {

  394.             .intra_dc_precision         = pce->intra_dc_precision,

  395.             .picture_structure          = pce->picture_structure,

  396.             .top_field_first            = pce->top_field_first,

  397.             .frame_pred_frame_dct       = pce->frame_pred_frame_dct,

  398.             .concealment_motion_vectors = pce->concealment_motion_vectors,

  399.             .q_scale_type               = pce->q_scale_type,

  400.             .intra_vlc_format           = pce->intra_vlc_format,

  401.             .alternate_scan             = pce->alternate_scan,

  402.             .repeat_first_field         = pce->repeat_first_field,

  403.             .progressive_frame          = pce->progressive_frame,

  404.             .composite_display_flag     = pce->composite_display_flag,

  405.         },

  406. 

  407.         .composite_display.bits = {

  408.             .v_axis            = pce->v_axis,

  409.             .field_sequence    = pce->field_sequence,

  410.             .sub_carrier       = pce->sub_carrier,

  411.             .burst_amplitude   = pce->burst_amplitude,

  412.             .sub_carrier_phase = pce->sub_carrier_phase,

  413.         },

  414.     };

  415. 

  416.     return 0;

  417. }

  418. 

  419. static int vaapi_encode_mpeg2_init_picture_params(AVCodecContext *avctx,

  420.                                                  VAAPIEncodePicture *pic)

  421. {

  422.     VAAPIEncodeMPEG2Context          *priv = avctx->priv_data;

  423.     MPEG2RawPictureHeader              *ph = &priv->picture_header;

  424.     MPEG2RawPictureCodingExtension    *pce = &priv->picture_coding_extension.data.picture_coding;

  425.     VAEncPictureParameterBufferMPEG2 *vpic = pic->codec_picture_params;

  426. 

  427.     if (pic->type == PICTURE_TYPE_IDR || pic->type == PICTURE_TYPE_I) {

  428.         ph->temporal_reference  = 0;

  429.         ph->picture_coding_type = 1;

  430.         priv->last_i_frame = pic->display_order;

  431.     } else {

  432.         ph->temporal_reference = pic->display_order - priv->last_i_frame;

  433.         ph->picture_coding_type = pic->type == PICTURE_TYPE_B ? 3 : 2;

  434.     }

  435. 

  436.     if (pic->type == PICTURE_TYPE_P || pic->type == PICTURE_TYPE_B) {

  437.         pce->f_code[0][0] = priv->f_code_horizontal;

  438.         pce->f_code[0][1] = priv->f_code_vertical;

  439.     } else {

  440.         pce->f_code[0][0] = 15;

  441.         pce->f_code[0][1] = 15;

  442.     }

  443.     if (pic->type == PICTURE_TYPE_B) {

  444.         pce->f_code[1][0] = priv->f_code_horizontal;

  445.         pce->f_code[1][1] = priv->f_code_vertical;

  446.     } else {

  447.         pce->f_code[1][0] = 15;

  448.         pce->f_code[1][1] = 15;

  449.     }

  450. 

  451.     vpic->reconstructed_picture = pic->recon_surface;

  452.     vpic->coded_buf             = pic->output_buffer;

  453. 

  454.     switch (pic->type) {

  455.     case PICTURE_TYPE_IDR:

  456.     case PICTURE_TYPE_I:

  457.         vpic->picture_type = VAEncPictureTypeIntra;

  458.         break;

  459.     case PICTURE_TYPE_P:

  460.         vpic->picture_type = VAEncPictureTypePredictive;

  461.         vpic->forward_reference_picture = pic->refs[0]->recon_surface;

  462.         break;

  463.     case PICTURE_TYPE_B:

  464.         vpic->picture_type = VAEncPictureTypeBidirectional;

  465.         vpic->forward_reference_picture  = pic->refs[0]->recon_surface;

  466.         vpic->backward_reference_picture = pic->refs[1]->recon_surface;

  467.         break;

  468.     default:

  469.         av_assert0(0 && "invalid picture type");

  470.     }

  471. 

  472.     vpic->temporal_reference = ph->temporal_reference;

  473.     vpic->f_code[0][0]       = pce->f_code[0][0];

  474.     vpic->f_code[0][1]       = pce->f_code[0][1];

  475.     vpic->f_code[1][0]       = pce->f_code[1][0];

  476.     vpic->f_code[1][1]       = pce->f_code[1][1];

  477. 

  478.     return 0;

  479. }

  480. 

  481. static int vaapi_encode_mpeg2_init_slice_params(AVCodecContext *avctx,

  482.                                                VAAPIEncodePicture *pic,

  483.                                                VAAPIEncodeSlice *slice)

  484. {

  485.     VAAPIEncodeMPEG2Context            *priv = avctx->priv_data;

  486.     VAEncSliceParameterBufferMPEG2   *vslice = slice->codec_slice_params;

  487.     int qp;

  488. 

  489.     vslice->macroblock_address = slice->block_start;

  490.     vslice->num_macroblocks    = slice->block_size;

  491. 

  492.     switch (pic->type) {

  493.     case PICTURE_TYPE_IDR:

  494.     case PICTURE_TYPE_I:

  495.         qp = priv->quant_i;

  496.         break;

  497.     case PICTURE_TYPE_P:

  498.         qp = priv->quant_p;

  499.         break;

  500.     case PICTURE_TYPE_B:

  501.         qp = priv->quant_b;

  502.         break;

  503.     default:

  504.         av_assert0(0 && "invalid picture type");

  505.     }

  506. 

  507.     vslice->quantiser_scale_code = qp;

  508.     vslice->is_intra_slice = (pic->type == PICTURE_TYPE_IDR ||

  509.                               pic->type == PICTURE_TYPE_I);

  510. 

  511.     return 0;

  512. }

  513. 

  514. static av_cold int vaapi_encode_mpeg2_configure(AVCodecContext *avctx)

  515. {

  516.     VAAPIEncodeContext       *ctx = avctx->priv_data;

  517.     VAAPIEncodeMPEG2Context *priv = avctx->priv_data;

  518.     int err;

  519. 

  520.     err = ff_cbs_init(&priv->cbc, AV_CODEC_ID_MPEG2VIDEO, avctx);

  521.     if (err < 0)

  522.         return err;

  523. 

  524.     if (ctx->va_rc_mode == VA_RC_CQP) {

  525.         priv->quant_p = av_clip(ctx->rc_quality, 1, 31);

  526.         if (avctx->i_quant_factor > 0.0)

  527.             priv->quant_i =

  528.                 av_clip((avctx->i_quant_factor * priv->quant_p +

  529.                          avctx->i_quant_offset) + 0.5, 1, 31);

  530.         else

  531.             priv->quant_i = priv->quant_p;

  532.         if (avctx->b_quant_factor > 0.0)

  533.             priv->quant_b =

  534.                 av_clip((avctx->b_quant_factor * priv->quant_p +

  535.                          avctx->b_quant_offset) + 0.5, 1, 31);

  536.         else

  537.             priv->quant_b = priv->quant_p;

  538. 

  539.         av_log(avctx, AV_LOG_DEBUG, "Using fixed quantiser "

  540.                "%d / %d / %d for I- / P- / B-frames.\n",

  541.                priv->quant_i, priv->quant_p, priv->quant_b);

  542. 

  543.     } else {

  544.         priv->quant_i = 16;

  545.         priv->quant_p = 16;

  546.         priv->quant_b = 16;

  547.     }

  548. 

  549.     ctx->slice_block_rows = FFALIGN(avctx->height, 16) / 16;

  550.     ctx->slice_block_cols = FFALIGN(avctx->width,  16) / 16;

  551. 

  552.     ctx->nb_slices  = ctx->slice_block_rows;

  553.     ctx->slice_size = 1;

  554. 

  555.     ctx->roi_quant_range = 31;

  556. 

  557.     return 0;

  558. }

  559. 

  560. static const VAAPIEncodeProfile vaapi_encode_mpeg2_profiles[] = {

  561.     { FF_PROFILE_MPEG2_MAIN,   8, 3, 1, 1, VAProfileMPEG2Main   },

  562.     { FF_PROFILE_MPEG2_SIMPLE, 8, 3, 1, 1, VAProfileMPEG2Simple },

  563.     { FF_PROFILE_UNKNOWN }

  564. };

  565. 

  566. static const VAAPIEncodeType vaapi_encode_type_mpeg2 = {

  567.     .profiles              = vaapi_encode_mpeg2_profiles,

  568. 

  569.     .flags                 = FLAG_B_PICTURES,

  570. 

  571.     .configure             = &vaapi_encode_mpeg2_configure,

  572. 

  573.     .default_quality       = 10,

  574. 

  575.     .sequence_params_size  = sizeof(VAEncSequenceParameterBufferMPEG2),

  576.     .init_sequence_params  = &vaapi_encode_mpeg2_init_sequence_params,

  577. 

  578.     .picture_params_size   = sizeof(VAEncPictureParameterBufferMPEG2),

  579.     .init_picture_params   = &vaapi_encode_mpeg2_init_picture_params,

  580. 

  581.     .slice_params_size     = sizeof(VAEncSliceParameterBufferMPEG2),

  582.     .init_slice_params     = &vaapi_encode_mpeg2_init_slice_params,

  583. 

  584.     .sequence_header_type  = VAEncPackedHeaderSequence,

  585.     .write_sequence_header = &vaapi_encode_mpeg2_write_sequence_header,

  586. 

  587.     .picture_header_type   = VAEncPackedHeaderPicture,

  588.     .write_picture_header  = &vaapi_encode_mpeg2_write_picture_header,

  589. };

  590. 

  591. static av_cold int vaapi_encode_mpeg2_init(AVCodecContext *avctx)

  592. {

  593.     VAAPIEncodeContext       *ctx = avctx->priv_data;

  594.     VAAPIEncodeMPEG2Context *priv = avctx->priv_data;

  595. 

  596.     ctx->codec = &vaapi_encode_type_mpeg2;

  597. 

  598.     if (avctx->profile == FF_PROFILE_UNKNOWN)

  599.         avctx->profile = priv->profile;

  600.     if (avctx->level == FF_LEVEL_UNKNOWN)

  601.         avctx->level = priv->level;

  602. 

  603.     // Reject unknown levels (these are required to set f_code for

  604.     // motion vector encoding).

  605.     switch (avctx->level) {

  606.     case 4: // High

  607.     case 6: // High 1440

  608.     case 8: // Main

  609.     case 10: // Low

  610.         break;

  611.     default:

  612.         av_log(avctx, AV_LOG_ERROR, "Unknown MPEG-2 level %d.\n",

  613.                avctx->level);

  614.         return AVERROR(EINVAL);

  615.     }

  616. 

  617.     if (avctx->height % 4096 == 0 || avctx->width % 4096 == 0) {

  618.         av_log(avctx, AV_LOG_ERROR, "MPEG-2 does not support picture "

  619.                "height or width divisible by 4096.\n");

  620.         return AVERROR(EINVAL);

  621.     }

  622. 

  623.     ctx->desired_packed_headers = VA_ENC_PACKED_HEADER_SEQUENCE |

  624.                                   VA_ENC_PACKED_HEADER_PICTURE;

  625. 

  626.     ctx->surface_width  = FFALIGN(avctx->width,  16);

  627.     ctx->surface_height = FFALIGN(avctx->height, 16);

  628. 

  629.     return ff_vaapi_encode_init(avctx);

  630. }

  631. 

  632. static av_cold int vaapi_encode_mpeg2_close(AVCodecContext *avctx)

  633. {

  634.     VAAPIEncodeMPEG2Context *priv = avctx->priv_data;

  635. 

  636.     ff_cbs_fragment_free(priv->cbc, &priv->current_fragment);

  637.     ff_cbs_close(&priv->cbc);

  638. 

  639.     return ff_vaapi_encode_close(avctx);

  640. }

  641. 

  642. #define OFFSET(x) offsetof(VAAPIEncodeMPEG2Context, x)

  643. #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)

  644. static const AVOption vaapi_encode_mpeg2_options[] = {

  645.     VAAPI_ENCODE_COMMON_OPTIONS,

  646.     VAAPI_ENCODE_RC_OPTIONS,

  647. 

  648.     { "profile", "Set profile (in profile_and_level_indication)",

  649.       OFFSET(profile), AV_OPT_TYPE_INT,

  650.       { .i64 = FF_PROFILE_UNKNOWN }, FF_PROFILE_UNKNOWN, 7, FLAGS, "profile" },

  651. 

  652. #define PROFILE(name, value)  name, NULL, 0, AV_OPT_TYPE_CONST, \

  653.       { .i64 = value }, 0, 0, FLAGS, "profile"

  654.     { PROFILE("simple", FF_PROFILE_MPEG2_SIMPLE) },

  655.     { PROFILE("main",   FF_PROFILE_MPEG2_MAIN)   },

  656. #undef PROFILE

  657. 

  658.     { "level", "Set level (in profile_and_level_indication)",

  659.       OFFSET(level), AV_OPT_TYPE_INT,

  660.       { .i64 = 4 }, 0, 15, FLAGS, "level" },

  661. 

  662. #define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, \

  663.       { .i64 = value }, 0, 0, FLAGS, "level"

  664.     { LEVEL("low",       10) },

  665.     { LEVEL("main",       8) },

  666.     { LEVEL("high_1440",  6) },

  667.     { LEVEL("high",       4) },

  668. #undef LEVEL

  669. 

  670.     { NULL },

  671. };

  672. 

  673. static const AVCodecDefault vaapi_encode_mpeg2_defaults[] = {

  674.     { "b",              "0"   },

  675.     { "bf",             "1"   },

  676.     { "g",              "120" },

  677.     { "i_qfactor",      "1"   },

  678.     { "i_qoffset",      "0"   },

  679.     { "b_qfactor",      "6/5" },

  680.     { "b_qoffset",      "0"   },

  681.     { "qmin",           "-1"  },

  682.     { "qmax",           "-1"  },

  683.     { NULL },

  684. };

  685. 

  686. static const AVClass vaapi_encode_mpeg2_class = {

  687.     .class_name = "mpeg2_vaapi",

  688.     .item_name  = av_default_item_name,

  689.     .option     = vaapi_encode_mpeg2_options,

  690.     .version    = LIBAVUTIL_VERSION_INT,

  691. };

  692. 

  693. AVCodec ff_mpeg2_vaapi_encoder = {

  694.     .name           = "mpeg2_vaapi",

  695.     .long_name      = NULL_IF_CONFIG_SMALL("MPEG-2 (VAAPI)"),

  696.     .type           = AVMEDIA_TYPE_VIDEO,

  697.     .id             = AV_CODEC_ID_MPEG2VIDEO,

  698.     .priv_data_size = sizeof(VAAPIEncodeMPEG2Context),

  699.     .init           = &vaapi_encode_mpeg2_init,

  700.     .send_frame     = &ff_vaapi_encode_send_frame,

  701.     .receive_packet = &ff_vaapi_encode_receive_packet,

  702.     .close          = &vaapi_encode_mpeg2_close,

  703.     .priv_class     = &vaapi_encode_mpeg2_class,

  704.     .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HARDWARE,

  705.     .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,

  706.     .defaults       = vaapi_encode_mpeg2_defaults,

  707.     .pix_fmts = (const enum AVPixelFormat[]) {

  708.         AV_PIX_FMT_VAAPI,

  709.         AV_PIX_FMT_NONE,

  710.     },

  711.     .hw_configs     = ff_vaapi_encode_hw_configs,

  712.     .wrapper_name   = "vaapi",

  713. };