Entirely replace older encode implementation with a new one

1 files changed, 0 insertions, 833 deletions

diff --git a/encode2.c b/encode2.c
deleted file mode 100644
index 309e7c4..0000000
--- a/encode2.c
+++ /dev/null
@@ -1,833 +0,0 @@
-/*
- * Copyright (C) 2023 Mikhail Burakov. This file is part of streamer.
- *
- * streamer is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * streamer 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with streamer.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-#include <assert.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/uio.h>
-#include <unistd.h>
-#include <va/va.h>
-#include <va/va_drm.h>
-#include <va/va_drmcommon.h>
-
-#include "bitstream.h"
-#include "encode.h"
-#include "gpu.h"
-#include "hevc.h"
-#include "toolbox/utils.h"
-
-struct EncodeContext {
-  struct GpuContext* gpu_context;
-  uint32_t width;
-  uint32_t height;
-  enum YuvColorspace colorspace;
-  enum YuvRange range;
-
-  int render_node;
-  VADisplay va_display;
-  VAConfigID va_config_id;
-
-  struct {
-    bool packed_header_sequence;
-    bool packed_header_slice;
-  } codec_quirks;
-
-  VAContextID va_context_id;
-  VASurfaceID input_surface_id;
-  struct GpuFrame* gpu_frame;
-
-  VASurfaceID recon_surface_ids[2];
-  VABufferID output_buffer_id;
-
-  VAEncSequenceParameterBufferHEVC seq;
-  VAEncPictureParameterBufferHEVC pic;
-  VAEncSliceParameterBufferHEVC slice;
-  size_t frame_counter;
-};
-
-static const char* VaErrorString(VAStatus error) {
-  static const char* va_error_strings[] = {
-      "VA_STATUS_SUCCESS",
-      "VA_STATUS_ERROR_OPERATION_FAILED",
-      "VA_STATUS_ERROR_ALLOCATION_FAILED",
-      "VA_STATUS_ERROR_INVALID_DISPLAY",
-      "VA_STATUS_ERROR_INVALID_CONFIG",
-      "VA_STATUS_ERROR_INVALID_CONTEXT",
-      "VA_STATUS_ERROR_INVALID_SURFACE",
-      "VA_STATUS_ERROR_INVALID_BUFFER",
-      "VA_STATUS_ERROR_INVALID_IMAGE",
-      "VA_STATUS_ERROR_INVALID_SUBPICTURE",
-      "VA_STATUS_ERROR_ATTR_NOT_SUPPORTED",
-      "VA_STATUS_ERROR_MAX_NUM_EXCEEDED",
-      "VA_STATUS_ERROR_UNSUPPORTED_PROFILE",
-      "VA_STATUS_ERROR_UNSUPPORTED_ENTRYPOINT",
-      "VA_STATUS_ERROR_UNSUPPORTED_RT_FORMAT",
-      "VA_STATUS_ERROR_UNSUPPORTED_BUFFERTYPE",
-      "VA_STATUS_ERROR_SURFACE_BUSY",
-      "VA_STATUS_ERROR_FLAG_NOT_SUPPORTED",
-      "VA_STATUS_ERROR_INVALID_PARAMETER",
-      "VA_STATUS_ERROR_RESOLUTION_NOT_SUPPORTED",
-      "VA_STATUS_ERROR_UNIMPLEMENTED",
-      "VA_STATUS_ERROR_SURFACE_IN_DISPLAYING",
-      "VA_STATUS_ERROR_INVALID_IMAGE_FORMAT",
-      "VA_STATUS_ERROR_DECODING_ERROR",
-      "VA_STATUS_ERROR_ENCODING_ERROR",
-      "VA_STATUS_ERROR_INVALID_VALUE",
-      "???",
-      "???",
-      "???",
-      "???",
-      "???",
-      "???",
-      "VA_STATUS_ERROR_UNSUPPORTED_FILTER",
-      "VA_STATUS_ERROR_INVALID_FILTER_CHAIN",
-      "VA_STATUS_ERROR_HW_BUSY",
-      "???",
-      "VA_STATUS_ERROR_UNSUPPORTED_MEMORY_TYPE",
-      "VA_STATUS_ERROR_NOT_ENOUGH_BUFFER",
-      "VA_STATUS_ERROR_TIMEDOUT",
-  };
-  return VA_STATUS_SUCCESS <= error && error <= VA_STATUS_ERROR_TIMEDOUT
-             ? va_error_strings[error - VA_STATUS_SUCCESS]
-             : "???";
-}
-
-static void OnVaLogMessage(void* context, const char* message) {
-  (void)context;
-  size_t len = strlen(message);
-  while (message[len - 1] == '\n') len--;
-  LOG("%.*s", (int)len, message);
-}
-
-static bool InitializeCodecQuirks(struct EncodeContext* encode_context) {
-  bool result = false;
-  VAProfile dummy_profile;
-  VAEntrypoint dummy_entrypoint;
-  int num_attribs = vaMaxNumConfigAttributes(encode_context->va_display);
-  VAConfigAttrib* attrib_list =
-      malloc((size_t)num_attribs * sizeof(VAConfigAttrib));
-  VAStatus status = vaQueryConfigAttributes(
-      encode_context->va_display, encode_context->va_config_id, &dummy_profile,
-      &dummy_entrypoint, attrib_list, &num_attribs);
-  if (status != VA_STATUS_SUCCESS) {
-    LOG("Failed to query va config attributes (%s)", VaErrorString(status));
-    goto rollback_attrib_list;
-  }
-
-  for (int i = 0; i < num_attribs; i++) {
-    if (attrib_list[i].type == VAConfigAttribEncPackedHeaders) {
-      encode_context->codec_quirks.packed_header_sequence =
-          !!(attrib_list[i].value & VA_ENC_PACKED_HEADER_SEQUENCE);
-      encode_context->codec_quirks.packed_header_slice =
-          !!(attrib_list[i].value & VA_ENC_PACKED_HEADER_SLICE);
-    }
-  }
-  result = true;
-
-rollback_attrib_list:
-  free(attrib_list);
-  return result;
-}
-
-static struct GpuFrame* VaSurfaceToGpuFrame(VADisplay va_display,
-                                            VASurfaceID va_surface_id,
-                                            struct GpuContext* gpu_context) {
-  VADRMPRIMESurfaceDescriptor prime;
-  VAStatus status = vaExportSurfaceHandle(
-      va_display, va_surface_id, VA_SURFACE_ATTRIB_MEM_TYPE_DRM_PRIME_2,
-      VA_EXPORT_SURFACE_WRITE_ONLY | VA_EXPORT_SURFACE_COMPOSED_LAYERS, &prime);
-  if (status != VA_STATUS_SUCCESS) {
-    LOG("Failed to export va surface (%s)", VaErrorString(status));
-    return NULL;
-  }
-
-  struct GpuFramePlane planes[] = {{.dmabuf_fd = -1},
-                                   {.dmabuf_fd = -1},
-                                   {.dmabuf_fd = -1},
-                                   {.dmabuf_fd = -1}};
-  static_assert(LENGTH(planes) == LENGTH(prime.layers[0].object_index),
-                "Suspicious VADRMPRIMESurfaceDescriptor structure");
-
-  for (size_t i = 0; i < prime.layers[0].num_planes; i++) {
-    uint32_t object_index = prime.layers[0].object_index[i];
-    planes[i] = (struct GpuFramePlane){
-        .dmabuf_fd = prime.objects[object_index].fd,
-        .pitch = prime.layers[0].pitch[i],
-        .offset = prime.layers[0].offset[i],
-        .modifier = prime.objects[object_index].drm_format_modifier,
-    };
-  }
-
-  struct GpuFrame* gpu_frame =
-      GpuContextCreateFrame(gpu_context, prime.width, prime.height,
-                            prime.fourcc, prime.layers[0].num_planes, planes);
-  if (!gpu_frame) {
-    LOG("Failed to create gpu frame");
-    goto release_planes;
-  }
-  return gpu_frame;
-
-release_planes:
-  CloseUniqueFds((int[]){planes[0].dmabuf_fd, planes[1].dmabuf_fd,
-                         planes[2].dmabuf_fd, planes[3].dmabuf_fd});
-  return NULL;
-}
-
-static void InitializeSeqHeader(struct EncodeContext* encode_context,
-                                uint16_t pic_width_in_luma_samples,
-                                uint16_t pic_height_in_luma_samples) {
-  encode_context->seq = (VAEncSequenceParameterBufferHEVC){
-      .general_profile_idc = 1,  // Main profile
-      .general_level_idc = 120,  // Level 4
-      .general_tier_flag = 0,    // Main tier
-
-      .intra_period = 120,      // Where this one comes from?
-      .intra_idr_period = 120,  // Each I frame is an IDR frame
-      .ip_period = 1,           // No B-frames
-      .bits_per_second = 0,     // TODO (investigate)
-
-      .pic_width_in_luma_samples = pic_width_in_luma_samples,
-      .pic_height_in_luma_samples = pic_height_in_luma_samples,
-
-      .seq_fields.bits =
-          {
-              .chroma_format_idc = 1,                    // 4:2:0
-              .separate_colour_plane_flag = 0,           // Table 6-1
-              .bit_depth_luma_minus8 = 0,                // 8 bpp luma
-              .bit_depth_chroma_minus8 = 0,              // 8 bpp chroma
-              .scaling_list_enabled_flag = 0,            // defaulted
-              .strong_intra_smoothing_enabled_flag = 0,  // defaulted
-
-              // mburakov: ffmpeg hardcodes these for i965 Skylake driver.
-              .amp_enabled_flag = 1,                     // TODO (quirks)
-              .sample_adaptive_offset_enabled_flag = 0,  // TODO (quirks)
-              .pcm_enabled_flag = 0,                     // TODO (quirks)
-              .pcm_loop_filter_disabled_flag = 0,        // defaulted
-              .sps_temporal_mvp_enabled_flag = 0,        // TODO (quirks)
-
-              .low_delay_seq = 1,     // No B-frames
-              .hierachical_flag = 0,  // defaulted
-          },
-
-      // mburakov: ffmpeg hardcodes these for i965 Skylake driver.
-      .log2_min_luma_coding_block_size_minus3 = 0,    // TODO (quirks)
-      .log2_diff_max_min_luma_coding_block_size = 2,  // TODO (quirks)
-      .log2_min_transform_block_size_minus2 = 0,      // hardcoded
-      .log2_diff_max_min_transform_block_size = 3,    // hardcoded
-      .max_transform_hierarchy_depth_inter = 3,       // hardcoded
-      .max_transform_hierarchy_depth_intra = 3,       // hardcoded
-
-      .pcm_sample_bit_depth_luma_minus1 = 0,            // defaulted
-      .pcm_sample_bit_depth_chroma_minus1 = 0,          // defaulted
-      .log2_min_pcm_luma_coding_block_size_minus3 = 0,  // defaulted
-      .log2_max_pcm_luma_coding_block_size_minus3 = 0,  // defaulted
-
-      .vui_parameters_present_flag = 1,
-      .vui_fields.bits =
-          {
-              .aspect_ratio_info_present_flag = 0,           // defaulted
-              .neutral_chroma_indication_flag = 0,           // defaulted
-              .field_seq_flag = 0,                           // defaulted
-              .vui_timing_info_present_flag = 1,             // hardcoded
-              .bitstream_restriction_flag = 1,               // hardcoded
-              .tiles_fixed_structure_flag = 0,               // defaulted
-              .motion_vectors_over_pic_boundaries_flag = 1,  // hardcoded
-              .restricted_ref_pic_lists_flag = 1,            // hardcoded
-              .log2_max_mv_length_horizontal = 15,           // hardcoded
-              .log2_max_mv_length_vertical = 15,             // hardcoded
-          },
-
-      .vui_num_units_in_tick = 1,         // TODO (investigate)
-      .vui_time_scale = 60,               // TODO (investigate)
-      .min_spatial_segmentation_idc = 0,  // defaulted
-      .max_bytes_per_pic_denom = 0,       // hardcoded
-      .max_bits_per_min_cu_denom = 0,     // hardcoded
-
-      .scc_fields.bits =
-          {
-              .palette_mode_enabled_flag = 0,  // defaulted
-          },
-  };
-}
-
-static void InitializePicHeader(struct EncodeContext* encode_context) {
-  const typeof(encode_context->seq.seq_fields.bits)* seq_bits =
-      &encode_context->seq.seq_fields.bits;
-
-  uint8_t collocated_ref_pic_index =
-      seq_bits->sps_temporal_mvp_enabled_flag ? 0 : 0xff;
-
-  encode_context->pic = (VAEncPictureParameterBufferHEVC){
-      .decoded_curr_pic =
-          {
-              .picture_id = VA_INVALID_ID,       // dynamic
-              .flags = VA_PICTURE_HEVC_INVALID,  // dynamic
-          },
-
-      // .reference_frames[15],
-
-      .coded_buf = encode_context->output_buffer_id,
-      .collocated_ref_pic_index = collocated_ref_pic_index,
-      .last_picture = 0,  // hardcoded
-
-      .pic_init_qp = 30,            // Fixed quality
-      .diff_cu_qp_delta_depth = 0,  // Fixed quality
-      .pps_cb_qp_offset = 0,        // hardcoded
-      .pps_cr_qp_offset = 0,        // hardcoded
-
-      .num_tile_columns_minus1 = 0,  // No tiles
-      .num_tile_rows_minus1 = 0,     // No tiles
-      .column_width_minus1 = {0},    // No tiles
-      .row_height_minus1 = {0},      // No tiles
-
-      .log2_parallel_merge_level_minus2 = 0,      // defaulted
-      .ctu_max_bitsize_allowed = 0,               // hardcoded
-      .num_ref_idx_l0_default_active_minus1 = 0,  // hardcoded
-      .num_ref_idx_l1_default_active_minus1 = 0,  // hardcoded
-      .slice_pic_parameter_set_id = 0,            // hardcoded
-      .nal_unit_type = 0,                         // dynamic
-
-      .pic_fields.bits =
-          {
-              .idr_pic_flag = 0,        // dynamic
-              .coding_type = 0,         // dynamic
-              .reference_pic_flag = 1,  // No B-frames
-
-              .dependent_slice_segments_enabled_flag = 0,  // defaulted
-              .sign_data_hiding_enabled_flag = 0,          // defaulted
-              .constrained_intra_pred_flag = 0,            // defaulted
-              .transform_skip_enabled_flag = 0,            // TODO (quirks)
-              .cu_qp_delta_enabled_flag = 0,               // Fixed quality
-              .weighted_pred_flag = 0,                     // defaulted
-              .weighted_bipred_flag = 0,                   // defaulted
-              .transquant_bypass_enabled_flag = 0,         // defaulted
-              .tiles_enabled_flag = 0,                     // No tiles
-              .entropy_coding_sync_enabled_flag = 0,       // defaulted
-              .loop_filter_across_tiles_enabled_flag = 0,  // No tiles
-
-              .pps_loop_filter_across_slices_enabled_flag = 1,  // hardcoded
-              .scaling_list_data_present_flag = 0,              // defaulted
-
-              .screen_content_flag = 0,             // TODO (investigate)
-              .enable_gpu_weighted_prediction = 0,  // hardcoded
-              .no_output_of_prior_pics_flag = 0,    // hardcoded
-          },
-
-      .hierarchical_level_plus1 = 0,  // defaulted
-      .scc_fields.bits =
-          {
-              .pps_curr_pic_ref_enabled_flag = 0,  // defaulted
-          },
-  };
-
-  for (size_t i = 0; i < LENGTH(encode_context->pic.reference_frames); i++) {
-    encode_context->pic.reference_frames[i] = (VAPictureHEVC){
-        .picture_id = VA_INVALID_ID,
-        .flags = VA_PICTURE_HEVC_INVALID,
-    };
-  }
-}
-
-static void InitializeSliceHeader(struct EncodeContext* encode_context,
-                                  uint32_t num_ctu_in_slice) {
-  const typeof(encode_context->seq.seq_fields.bits)* seq_bits =
-      &encode_context->seq.seq_fields.bits;
-
-  encode_context->slice = (VAEncSliceParameterBufferHEVC){
-      .slice_segment_address = 0,  // No slice segments
-      .num_ctu_in_slice = num_ctu_in_slice,
-
-      .slice_type = 0,  // dynamic
-      .slice_pic_parameter_set_id =
-          encode_context->pic.slice_pic_parameter_set_id,
-
-      .num_ref_idx_l0_active_minus1 =
-          encode_context->pic.num_ref_idx_l0_default_active_minus1,
-      .num_ref_idx_l1_active_minus1 =
-          encode_context->pic.num_ref_idx_l1_default_active_minus1,
-
-      .luma_log2_weight_denom = 0,          // defaulted
-      .delta_chroma_log2_weight_denom = 0,  // defaulted
-
-      // .delta_luma_weight_l0[15],
-      // .luma_offset_l0[15],
-      // .delta_chroma_weight_l0[15][2],
-      // .chroma_offset_l0[15][2],
-      // .delta_luma_weight_l1[15],
-      // .luma_offset_l1[15],
-      // .delta_chroma_weight_l1[15][2],
-      // .chroma_offset_l1[15][2],
-
-      .max_num_merge_cand = 5,  // defaulted
-      .slice_qp_delta = 0,      // Fixed quality
-      .slice_cb_qp_offset = 0,  // defaulted
-      .slice_cr_qp_offset = 0,  // defaulted
-
-      .slice_beta_offset_div2 = 0,  // defaulted
-      .slice_tc_offset_div2 = 0,    // defaulted
-
-      .slice_fields.bits =
-          {
-              .last_slice_of_pic_flag = 1,        // No slice segments
-              .dependent_slice_segment_flag = 0,  // No slice segments
-              .colour_plane_id = 0,               // defaulted
-              .slice_temporal_mvp_enabled_flag =
-                  seq_bits->sps_temporal_mvp_enabled_flag,
-              .slice_sao_luma_flag =
-                  seq_bits->sample_adaptive_offset_enabled_flag,
-              .slice_sao_chroma_flag =
-                  seq_bits->sample_adaptive_offset_enabled_flag,
-              .num_ref_idx_active_override_flag = 0,              // hardcoded
-              .mvd_l1_zero_flag = 0,                              // defaulted
-              .cabac_init_flag = 0,                               // defaulted
-              .slice_deblocking_filter_disabled_flag = 0,         // defaulted
-              .slice_loop_filter_across_slices_enabled_flag = 0,  // defaulted
-              .collocated_from_l0_flag = 0,                       // No B-frames
-          },
-
-      .pred_weight_table_bit_offset = 0,  // defaulted
-      .pred_weight_table_bit_length = 0,  // defaulted
-  };
-
-  for (size_t i = 0; i < LENGTH(encode_context->slice.ref_pic_list0); i++) {
-    encode_context->slice.ref_pic_list0[i] = (VAPictureHEVC){
-        .picture_id = VA_INVALID_ID,
-        .flags = VA_PICTURE_HEVC_INVALID,
-    };
-  }
-
-  for (size_t i = 0; i < LENGTH(encode_context->slice.ref_pic_list1); i++) {
-    encode_context->slice.ref_pic_list1[i] = (VAPictureHEVC){
-        .picture_id = VA_INVALID_ID,
-        .flags = VA_PICTURE_HEVC_INVALID,
-    };
-  }
-}
-
-struct EncodeContext* EncodeContextCreate(struct GpuContext* gpu_context,
-                                          uint32_t width, uint32_t height,
-                                          enum YuvColorspace colorspace,
-                                          enum YuvRange range) {
-  struct EncodeContext* encode_context = malloc(sizeof(struct EncodeContext));
-  if (!encode_context) {
-    LOG("Faield to allocate encode context (%s)", strerror(errno));
-    return NULL;
-  }
-
-  *encode_context = (struct EncodeContext){
-      .gpu_context = gpu_context,
-      .width = width,
-      .height = height,
-      .colorspace = colorspace,
-      .range = range,
-  };
-
-  encode_context->render_node = open("/dev/dri/renderD128", O_RDWR);
-  if (encode_context->render_node == -1) {
-    LOG("Failed to open render node (%s)", strerror(errno));
-    goto rollback_encode_context;
-  }
-
-  encode_context->va_display = vaGetDisplayDRM(encode_context->render_node);
-  if (!encode_context->va_display) {
-    LOG("Failed to get va display (%s)", strerror(errno));
-    goto rollback_render_node;
-  }
-
-  vaSetErrorCallback(encode_context->va_display, OnVaLogMessage, NULL);
-#ifndef NDEBUG
-  vaSetInfoCallback(encode_context->va_display, OnVaLogMessage, NULL);
-#endif  // NDEBUG
-
-  int major, minor;
-  VAStatus status = vaInitialize(encode_context->va_display, &major, &minor);
-  if (status != VA_STATUS_SUCCESS) {
-    LOG("Failed to initialize va (%s)", VaErrorString(status));
-    goto rollback_va_display;
-  }
-
-  LOG("Initialized VA %d.%d", major, minor);
-  // TODO(mburakov): Check entry points?
-
-  VAConfigAttrib attrib_list[] = {
-      {.type = VAConfigAttribRTFormat, .value = VA_RT_FORMAT_YUV420},
-  };
-  status = vaCreateConfig(encode_context->va_display, VAProfileHEVCMain,
-                          VAEntrypointEncSlice, attrib_list,
-                          LENGTH(attrib_list), &encode_context->va_config_id);
-  if (status != VA_STATUS_SUCCESS) {
-    LOG("Failed to create va config (%s)", VaErrorString(status));
-    goto rollback_va_display;
-  }
-
-  if (!InitializeCodecQuirks(encode_context)) {
-    LOG("Failed to initialize codec quirks");
-    goto rollback_va_config_id;
-  }
-
-  // TODO(mburakov): ffmpeg attempts to deduce this.
-  static const uint32_t min_cb_size = 16;
-  uint32_t width_in_cb = (width + min_cb_size - 1) / min_cb_size;
-  uint32_t height_in_cb = (height + min_cb_size - 1) / min_cb_size;
-
-  // TODO(mburakov): ffmpeg attempts to deduce this.
-  static const uint32_t slice_block_size = 32;
-  uint32_t slice_block_rows =
-      (encode_context->width + slice_block_size - 1) / slice_block_size;
-  uint32_t slice_block_cols =
-      (encode_context->height + slice_block_size - 1) / slice_block_size;
-  uint32_t num_ctu_in_slice = slice_block_rows * slice_block_cols;
-
-  status = vaCreateContext(
-      encode_context->va_display, encode_context->va_config_id,
-      (int)(width_in_cb * min_cb_size), (int)(height_in_cb * min_cb_size),
-      VA_PROGRESSIVE, NULL, 0, &encode_context->va_context_id);
-  if (status != VA_STATUS_SUCCESS) {
-    LOG("Failed to create va context (%s)", VaErrorString(status));
-    goto rollback_va_config_id;
-  }
-
-  status =
-      vaCreateSurfaces(encode_context->va_display, VA_RT_FORMAT_YUV420, width,
-                       height, &encode_context->input_surface_id, 1, NULL, 0);
-  if (status != VA_STATUS_SUCCESS) {
-    LOG("Failed to create va input surface (%s)", VaErrorString(status));
-    goto rollback_va_context_id;
-  }
-
-  encode_context->gpu_frame = VaSurfaceToGpuFrame(
-      encode_context->va_display, encode_context->input_surface_id,
-      encode_context->gpu_context);
-  if (!encode_context->gpu_frame) {
-    LOG("Failed to convert va surface to gpu frame");
-    goto rollback_input_surface_id;
-  }
-
-  status =
-      vaCreateSurfaces(encode_context->va_display, VA_RT_FORMAT_YUV420,
-                       width_in_cb * min_cb_size, height_in_cb * min_cb_size,
-                       encode_context->recon_surface_ids,
-                       LENGTH(encode_context->recon_surface_ids), NULL, 0);
-  if (status != VA_STATUS_SUCCESS) {
-    LOG("Failed to create va recon surfaces (%s)", VaErrorString(status));
-    goto rollback_gpu_frame;
-  }
-
-  unsigned int max_encoded_size =
-      encode_context->width * encode_context->height * 3 / 2;
-  status =
-      vaCreateBuffer(encode_context->va_display, encode_context->va_context_id,
-                     VAEncCodedBufferType, max_encoded_size, 1, NULL,
-                     &encode_context->output_buffer_id);
-  if (status != VA_STATUS_SUCCESS) {
-    LOG("Failed to create va output buffer (%s)", VaErrorString(status));
-    goto rollback_recon_surface_ids;
-  }
-
-  InitializeSeqHeader(encode_context, (uint16_t)(width_in_cb * min_cb_size),
-                      (uint16_t)(height_in_cb * min_cb_size));
-  InitializePicHeader(encode_context);
-  InitializeSliceHeader(encode_context, num_ctu_in_slice);
-  return encode_context;
-
-rollback_recon_surface_ids:
-  vaDestroySurfaces(encode_context->va_display,
-                    encode_context->recon_surface_ids,
-                    LENGTH(encode_context->recon_surface_ids));
-rollback_gpu_frame:
-  GpuContextDestroyFrame(encode_context->gpu_context,
-                         encode_context->gpu_frame);
-rollback_input_surface_id:
-  vaDestroySurfaces(encode_context->va_display,
-                    &encode_context->input_surface_id, 1);
-rollback_va_context_id:
-  vaDestroyContext(encode_context->va_display, encode_context->va_config_id);
-rollback_va_config_id:
-  vaDestroyConfig(encode_context->va_display, encode_context->va_config_id);
-rollback_va_display:
-  vaTerminate(encode_context->va_display);
-rollback_render_node:
-  close(encode_context->render_node);
-rollback_encode_context:
-  free(encode_context);
-  return NULL;
-}
-
-const struct GpuFrame* EncodeContextGetFrame(
-    struct EncodeContext* encode_context) {
-  return encode_context->gpu_frame;
-}
-
-static bool UploadBuffer(const struct EncodeContext* encode_context,
-                         VABufferType va_buffer_type, unsigned int size,
-                         void* data, VABufferID** presult) {
-  VAStatus status =
-      vaCreateBuffer(encode_context->va_display, encode_context->va_context_id,
-                     va_buffer_type, size, 1, data, *presult);
-  if (status != VA_STATUS_SUCCESS) {
-    LOG("Failed to create buffer (%s)", VaErrorString(status));
-    return false;
-  }
-  (*presult)++;
-  return true;
-}
-
-static bool UploadPackedBuffer(const struct EncodeContext* encode_context,
-                               VAEncPackedHeaderType packed_header_type,
-                               unsigned int bit_length, void* data,
-                               VABufferID** presult) {
-  VAEncPackedHeaderParameterBuffer packed_header = {
-      .type = packed_header_type,
-      .bit_length = bit_length,
-      .has_emulation_bytes = 1,
-  };
-  return UploadBuffer(encode_context, VAEncPackedHeaderParameterBufferType,
-                      sizeof(packed_header), &packed_header, presult) &&
-         UploadBuffer(encode_context, VAEncPackedHeaderDataBufferType,
-                      (bit_length + 7) / 8, data, presult);
-}
-
-static void UpdatePicHeader(struct EncodeContext* encode_context, bool idr) {
-  encode_context->pic.decoded_curr_pic = (VAPictureHEVC){
-      .picture_id =
-          encode_context
-              ->recon_surface_ids[encode_context->frame_counter %
-                                  LENGTH(encode_context->recon_surface_ids)],
-      .pic_order_cnt = (int32_t)(encode_context->frame_counter %
-                                 encode_context->seq.intra_idr_period),
-  };
-
-  if (idr) {
-    encode_context->pic.reference_frames[0] = (VAPictureHEVC){
-        .picture_id = VA_INVALID_ID,
-        .flags = VA_PICTURE_HEVC_INVALID,
-    };
-    encode_context->pic.nal_unit_type = IDR_W_RADL;
-    encode_context->pic.pic_fields.bits.idr_pic_flag = 1;
-    encode_context->pic.pic_fields.bits.coding_type = 1;
-  } else {
-    encode_context->pic.reference_frames[0] = (VAPictureHEVC){
-        .picture_id =
-            encode_context
-                ->recon_surface_ids[(encode_context->frame_counter - 1) %
-                                    LENGTH(encode_context->recon_surface_ids)],
-        .pic_order_cnt = (int32_t)((encode_context->frame_counter - 1) %
-                                   encode_context->seq.intra_idr_period),
-    };
-    encode_context->pic.nal_unit_type = TRAIL_R;
-    encode_context->pic.pic_fields.bits.idr_pic_flag = 0;
-    encode_context->pic.pic_fields.bits.coding_type = 2;
-  }
-}
-
-static bool DrainBuffers(int fd, struct iovec* iovec, int count) {
-  for (;;) {
-    ssize_t result = writev(fd, iovec, count);
-    if (result < 0) {
-      if (errno == EINTR) continue;
-      LOG("Failed to write (%s)", strerror(errno));
-      return false;
-    }
-    for (int i = 0; i < count; i++) {
-      size_t delta = MIN((size_t)result, iovec[i].iov_len);
-      iovec[i].iov_base = (uint8_t*)iovec[i].iov_base + delta;
-      iovec[i].iov_len -= delta;
-      result -= delta;
-    }
-    if (!result) return true;
-  }
-}
-
-bool EncodeContextEncodeFrame(struct EncodeContext* encode_context, int fd) {
-  bool result = false;
-  VABufferID buffers[8];
-  VABufferID* buffer_ptr = buffers;
-
-  bool idr =
-      !(encode_context->frame_counter % encode_context->seq.intra_idr_period);
-  if (idr && !UploadBuffer(encode_context, VAEncSequenceParameterBufferType,
-                           sizeof(encode_context->seq), &encode_context->seq,
-                           &buffer_ptr)) {
-    LOG("Failed to upload sequence parameter buffer");
-    goto rollback_buffers;
-  }
-
-  if (encode_context->codec_quirks.packed_header_sequence && idr) {
-    char buffer[256];
-    struct Bitstream bitstream = {
-        .data = buffer,
-        .size = 0,
-    };
-
-    static const struct MoreVideoParameters mvp = {
-        .vps_max_dec_pic_buffering_minus1 = 1,  // No B-frames
-        .vps_max_num_reorder_pics = 0,          // No B-frames
-    };
-    uint32_t conf_win_right_offset_luma =
-        encode_context->seq.pic_width_in_luma_samples - encode_context->width;
-    uint32_t conf_win_bottom_offset_luma =
-        encode_context->seq.pic_height_in_luma_samples - encode_context->height;
-    const struct MoreSeqParameters msp = {
-        .conf_win_left_offset = 0,
-        .conf_win_right_offset = conf_win_right_offset_luma / 2,
-        .conf_win_top_offset = 0,
-        .conf_win_bottom_offset = conf_win_bottom_offset_luma / 2,
-        .sps_max_dec_pic_buffering_minus1 = 1,  // No B-frames
-        .sps_max_num_reorder_pics = 0,          // No B-frames
-        .video_signal_type_present_flag = 1,
-        .video_full_range_flag = encode_context->range == kFullRange,
-        .colour_description_present_flag = 1,
-        .colour_primaries = 2,          // Unsepcified
-        .transfer_characteristics = 2,  // Unspecified
-        .matrix_coeffs =
-            encode_context->colorspace == kItuRec601 ? 6 : 1,  // Table E.5
-    };
-
-    PackVideoParameterSetNalUnit(&bitstream, &encode_context->seq, &mvp);
-    PackSeqParameterSetNalUnit(&bitstream, &encode_context->seq, &msp);
-    PackPicParameterSetNalUnit(&bitstream, &encode_context->pic);
-    if (!UploadPackedBuffer(encode_context, VAEncPackedHeaderSequence,
-                            (unsigned int)bitstream.size, bitstream.data,
-                            &buffer_ptr)) {
-      LOG("Failed to upload packed sequence header");
-      goto rollback_buffers;
-    }
-  }
-
-  UpdatePicHeader(encode_context, idr);
-  if (!UploadBuffer(encode_context, VAEncPictureParameterBufferType,
-                    sizeof(encode_context->pic), &encode_context->pic,
-                    &buffer_ptr)) {
-    LOG("Failed to upload picture parameter buffer");
-    goto rollback_buffers;
-  }
-
-  encode_context->slice.slice_type = idr ? I : P;
-  encode_context->slice.ref_pic_list0[0] =
-      encode_context->pic.reference_frames[0];
-  if (encode_context->codec_quirks.packed_header_slice) {
-    char buffer[256];
-    struct Bitstream bitstream = {
-        .data = buffer,
-        .size = 0,
-    };
-    static const struct NegativePics negative_pics[] = {
-        {
-            .delta_poc_s0_minus1 = 0,
-            .used_by_curr_pic_s0_flag = true,
-        },
-    };
-    const struct MoreSliceParamerters msp = {
-        .first_slice_segment_in_pic_flag = 1,
-        .num_negative_pics = idr ? 0 : LENGTH(negative_pics),
-        .negative_pics = idr ? NULL : negative_pics,
-    };
-    PackSliceSegmentHeaderNalUnit(&bitstream, &encode_context->seq,
-                                  &encode_context->pic, &encode_context->slice,
-                                  &msp);
-    if (!UploadPackedBuffer(encode_context, VAEncPackedHeaderSlice,
-                            (unsigned int)bitstream.size, bitstream.data,
-                            &buffer_ptr)) {
-      LOG("Failed to upload packed sequence header");
-      goto rollback_buffers;
-    }
-  }
-
-  if (!UploadBuffer(encode_context, VAEncSliceParameterBufferType,
-                    sizeof(encode_context->slice), &encode_context->slice,
-                    &buffer_ptr)) {
-    LOG("Failed to upload slice parameter buffer");
-    goto rollback_buffers;
-  }
-
-  VAStatus status =
-      vaBeginPicture(encode_context->va_display, encode_context->va_context_id,
-                     encode_context->input_surface_id);
-  if (status != VA_STATUS_SUCCESS) {
-    LOG("Failed to begin va picture (%s)", VaErrorString(status));
-    goto rollback_buffers;
-  }
-
-  int num_buffers = (int)(buffer_ptr - buffers);
-  status = vaRenderPicture(encode_context->va_display,
-                           encode_context->va_context_id, buffers, num_buffers);
-  if (status != VA_STATUS_SUCCESS) {
-    LOG("Failed to render va picture (%s)", VaErrorString(status));
-    goto rollback_buffers;
-  }
-
-  status =
-      vaEndPicture(encode_context->va_display, encode_context->va_context_id);
-  if (status != VA_STATUS_SUCCESS) {
-    LOG("Failed to end va picture (%s)", VaErrorString(status));
-    goto rollback_buffers;
-  }
-
-  status = vaSyncBuffer(encode_context->va_display,
-                        encode_context->output_buffer_id, VA_TIMEOUT_INFINITE);
-  if (status != VA_STATUS_SUCCESS) {
-    LOG("Failed to sync va buffer (%s)", VaErrorString(status));
-    goto rollback_buffers;
-  }
-
-  VACodedBufferSegment* segment;
-  status = vaMapBuffer(encode_context->va_display,
-                       encode_context->output_buffer_id, (void**)&segment);
-  if (status != VA_STATUS_SUCCESS) {
-    LOG("Failed to map va buffer (%s)", VaErrorString(status));
-    goto rollback_buffers;
-  }
-  if (segment->next != NULL) {
-    LOG("Next segment non-null!");
-    abort();
-  }
-
-  struct iovec iovec[] = {
-      {.iov_base = &segment->size, .iov_len = sizeof(segment->size)},
-      {.iov_base = segment->buf, .iov_len = segment->size},
-  };
-  if (!DrainBuffers(fd, iovec, LENGTH(iovec))) {
-    LOG("Failed to drain encoded frame");
-    goto rollback_segment;
-  }
-
-  encode_context->frame_counter++;
-  result = true;
-
-rollback_segment:
-  vaUnmapBuffer(encode_context->va_display, encode_context->output_buffer_id);
-rollback_buffers:
-  while (buffer_ptr-- > buffers)
-    vaDestroyBuffer(encode_context->va_display, *buffer_ptr);
-  return result;
-}
-
-void EncodeContextDestroy(struct EncodeContext* encode_context) {
-  vaDestroyBuffer(encode_context->va_display, encode_context->output_buffer_id);
-  GpuContextDestroyFrame(encode_context->gpu_context,
-                         encode_context->gpu_frame);
-  vaDestroySurfaces(encode_context->va_display,
-                    &encode_context->input_surface_id, 1);
-  vaDestroyContext(encode_context->va_display, encode_context->va_context_id);
-  vaDestroyConfig(encode_context->va_display, encode_context->va_config_id);
-  vaTerminate(encode_context->va_display);
-  close(encode_context->render_node);
-  free(encode_context);
-}