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ffmpeg/libavcodec/hw_base_encode.c

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/*
* 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
*/
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/internal.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "encode.h"
#include "avcodec.h"
#include "hw_base_encode.h"
static void hw_base_encode_add_ref(FFHWBaseEncodePicture *pic,
FFHWBaseEncodePicture *target,
int is_ref, int in_dpb, int prev)
{
int refs = 0;
if (is_ref) {
av_assert0(pic != target);
av_assert0(pic->nb_refs[0] < MAX_PICTURE_REFERENCES &&
pic->nb_refs[1] < MAX_PICTURE_REFERENCES);
if (target->display_order < pic->display_order)
pic->refs[0][pic->nb_refs[0]++] = target;
else
pic->refs[1][pic->nb_refs[1]++] = target;
++refs;
}
if (in_dpb) {
av_assert0(pic->nb_dpb_pics < MAX_DPB_SIZE);
pic->dpb[pic->nb_dpb_pics++] = target;
++refs;
}
if (prev) {
av_assert0(!pic->prev);
pic->prev = target;
++refs;
}
target->ref_count[0] += refs;
target->ref_count[1] += refs;
}
static void hw_base_encode_remove_refs(FFHWBaseEncodePicture *pic, int level)
{
int i;
if (pic->ref_removed[level])
return;
for (i = 0; i < pic->nb_refs[0]; i++) {
av_assert0(pic->refs[0][i]);
--pic->refs[0][i]->ref_count[level];
av_assert0(pic->refs[0][i]->ref_count[level] >= 0);
}
for (i = 0; i < pic->nb_refs[1]; i++) {
av_assert0(pic->refs[1][i]);
--pic->refs[1][i]->ref_count[level];
av_assert0(pic->refs[1][i]->ref_count[level] >= 0);
}
for (i = 0; i < pic->nb_dpb_pics; i++) {
av_assert0(pic->dpb[i]);
--pic->dpb[i]->ref_count[level];
av_assert0(pic->dpb[i]->ref_count[level] >= 0);
}
av_assert0(pic->prev || pic->type == FF_HW_PICTURE_TYPE_IDR);
if (pic->prev) {
--pic->prev->ref_count[level];
av_assert0(pic->prev->ref_count[level] >= 0);
}
pic->ref_removed[level] = 1;
}
static void hw_base_encode_set_b_pictures(FFHWBaseEncodeContext *ctx,
FFHWBaseEncodePicture *start,
FFHWBaseEncodePicture *end,
FFHWBaseEncodePicture *prev,
int current_depth,
FFHWBaseEncodePicture **last)
{
FFHWBaseEncodePicture *pic, *next, *ref;
int i, len;
av_assert0(start && end && start != end && start->next != end);
// If we are at the maximum depth then encode all pictures as
// non-referenced B-pictures. Also do this if there is exactly one
// picture left, since there will be nothing to reference it.
if (current_depth == ctx->max_b_depth || start->next->next == end) {
for (pic = start->next; pic; pic = pic->next) {
if (pic == end)
break;
pic->type = FF_HW_PICTURE_TYPE_B;
pic->b_depth = current_depth;
hw_base_encode_add_ref(pic, start, 1, 1, 0);
hw_base_encode_add_ref(pic, end, 1, 1, 0);
hw_base_encode_add_ref(pic, prev, 0, 0, 1);
for (ref = end->refs[1][0]; ref; ref = ref->refs[1][0])
hw_base_encode_add_ref(pic, ref, 0, 1, 0);
}
*last = prev;
} else {
// Split the current list at the midpoint with a referenced
// B-picture, then descend into each side separately.
len = 0;
for (pic = start->next; pic != end; pic = pic->next)
++len;
for (pic = start->next, i = 1; 2 * i < len; pic = pic->next, i++);
pic->type = FF_HW_PICTURE_TYPE_B;
pic->b_depth = current_depth;
pic->is_reference = 1;
hw_base_encode_add_ref(pic, pic, 0, 1, 0);
hw_base_encode_add_ref(pic, start, 1, 1, 0);
hw_base_encode_add_ref(pic, end, 1, 1, 0);
hw_base_encode_add_ref(pic, prev, 0, 0, 1);
for (ref = end->refs[1][0]; ref; ref = ref->refs[1][0])
hw_base_encode_add_ref(pic, ref, 0, 1, 0);
if (i > 1)
hw_base_encode_set_b_pictures(ctx, start, pic, pic,
current_depth + 1, &next);
else
next = pic;
hw_base_encode_set_b_pictures(ctx, pic, end, next,
current_depth + 1, last);
}
}
static void hw_base_encode_add_next_prev(FFHWBaseEncodeContext *ctx,
FFHWBaseEncodePicture *pic)
{
int i;
if (!pic)
return;
if (pic->type == FF_HW_PICTURE_TYPE_IDR) {
for (i = 0; i < ctx->nb_next_prev; i++) {
--ctx->next_prev[i]->ref_count[0];
ctx->next_prev[i] = NULL;
}
ctx->next_prev[0] = pic;
++pic->ref_count[0];
ctx->nb_next_prev = 1;
return;
}
if (ctx->nb_next_prev < MAX_PICTURE_REFERENCES) {
ctx->next_prev[ctx->nb_next_prev++] = pic;
++pic->ref_count[0];
} else {
--ctx->next_prev[0]->ref_count[0];
for (i = 0; i < MAX_PICTURE_REFERENCES - 1; i++)
ctx->next_prev[i] = ctx->next_prev[i + 1];
ctx->next_prev[i] = pic;
++pic->ref_count[0];
}
}
static int hw_base_encode_pick_next(AVCodecContext *avctx,
FFHWBaseEncodeContext *ctx,
FFHWBaseEncodePicture **pic_out)
{
FFHWBaseEncodePicture *pic = NULL, *prev = NULL, *next, *start;
int i, b_counter, closed_gop_end;
// If there are any B-frames already queued, the next one to encode
// is the earliest not-yet-issued frame for which all references are
// available.
for (pic = ctx->pic_start; pic; pic = pic->next) {
if (pic->encode_issued)
continue;
if (pic->type != FF_HW_PICTURE_TYPE_B)
continue;
for (i = 0; i < pic->nb_refs[0]; i++) {
if (!pic->refs[0][i]->encode_issued)
break;
}
if (i != pic->nb_refs[0])
continue;
for (i = 0; i < pic->nb_refs[1]; i++) {
if (!pic->refs[1][i]->encode_issued)
break;
}
if (i == pic->nb_refs[1])
break;
}
if (pic) {
av_log(avctx, AV_LOG_DEBUG, "Pick B-picture at depth %d to "
"encode next.\n", pic->b_depth);
*pic_out = pic;
return 0;
}
// Find the B-per-Pth available picture to become the next picture
// on the top layer.
start = NULL;
b_counter = 0;
closed_gop_end = ctx->closed_gop ||
ctx->idr_counter == ctx->gop_per_idr;
for (pic = ctx->pic_start; pic; pic = next) {
next = pic->next;
if (pic->encode_issued) {
start = pic;
continue;
}
// If the next available picture is force-IDR, encode it to start
// a new GOP immediately.
if (pic->force_idr)
break;
if (b_counter == ctx->b_per_p)
break;
// If this picture ends a closed GOP or starts a new GOP then it
// needs to be in the top layer.
if (ctx->gop_counter + b_counter + closed_gop_end >= ctx->gop_size)
break;
// If the picture after this one is force-IDR, we need to encode
// this one in the top layer.
if (next && next->force_idr)
break;
++b_counter;
}
// At the end of the stream the last picture must be in the top layer.
if (!pic && ctx->end_of_stream) {
--b_counter;
pic = ctx->pic_end;
if (pic->encode_complete)
return AVERROR_EOF;
else if (pic->encode_issued)
return AVERROR(EAGAIN);
}
if (!pic) {
av_log(avctx, AV_LOG_DEBUG, "Pick nothing to encode next - "
"need more input for reference pictures.\n");
return AVERROR(EAGAIN);
}
if (ctx->input_order <= ctx->decode_delay && !ctx->end_of_stream) {
av_log(avctx, AV_LOG_DEBUG, "Pick nothing to encode next - "
"need more input for timestamps.\n");
return AVERROR(EAGAIN);
}
if (pic->force_idr) {
av_log(avctx, AV_LOG_DEBUG, "Pick forced IDR-picture to "
"encode next.\n");
pic->type = FF_HW_PICTURE_TYPE_IDR;
ctx->idr_counter = 1;
ctx->gop_counter = 1;
} else if (ctx->gop_counter + b_counter >= ctx->gop_size) {
if (ctx->idr_counter == ctx->gop_per_idr) {
av_log(avctx, AV_LOG_DEBUG, "Pick new-GOP IDR-picture to "
"encode next.\n");
pic->type = FF_HW_PICTURE_TYPE_IDR;
ctx->idr_counter = 1;
} else {
av_log(avctx, AV_LOG_DEBUG, "Pick new-GOP I-picture to "
"encode next.\n");
pic->type = FF_HW_PICTURE_TYPE_I;
++ctx->idr_counter;
}
ctx->gop_counter = 1;
} else {
if (ctx->gop_counter + b_counter + closed_gop_end == ctx->gop_size) {
av_log(avctx, AV_LOG_DEBUG, "Pick group-end P-picture to "
"encode next.\n");
} else {
av_log(avctx, AV_LOG_DEBUG, "Pick normal P-picture to "
"encode next.\n");
}
pic->type = FF_HW_PICTURE_TYPE_P;
av_assert0(start);
ctx->gop_counter += 1 + b_counter;
}
pic->is_reference = 1;
*pic_out = pic;
hw_base_encode_add_ref(pic, pic, 0, 1, 0);
if (pic->type != FF_HW_PICTURE_TYPE_IDR) {
// TODO: apply both previous and forward multi reference for all vaapi encoders.
// And L0/L1 reference frame number can be set dynamically through query
// VAConfigAttribEncMaxRefFrames attribute.
if (avctx->codec_id == AV_CODEC_ID_AV1) {
for (i = 0; i < ctx->nb_next_prev; i++)
hw_base_encode_add_ref(pic, ctx->next_prev[i],
pic->type == FF_HW_PICTURE_TYPE_P,
b_counter > 0, 0);
} else
hw_base_encode_add_ref(pic, start,
pic->type == FF_HW_PICTURE_TYPE_P,
b_counter > 0, 0);
hw_base_encode_add_ref(pic, ctx->next_prev[ctx->nb_next_prev - 1], 0, 0, 1);
}
if (b_counter > 0) {
hw_base_encode_set_b_pictures(ctx, start, pic, pic, 1,
&prev);
} else {
prev = pic;
}
hw_base_encode_add_next_prev(ctx, prev);
return 0;
}
static int hw_base_encode_clear_old(AVCodecContext *avctx, FFHWBaseEncodeContext *ctx)
{
FFHWBaseEncodePicture *pic, *prev, *next;
av_assert0(ctx->pic_start);
// Remove direct references once each picture is complete.
for (pic = ctx->pic_start; pic; pic = pic->next) {
if (pic->encode_complete && pic->next)
hw_base_encode_remove_refs(pic, 0);
}
// Remove indirect references once a picture has no direct references.
for (pic = ctx->pic_start; pic; pic = pic->next) {
if (pic->encode_complete && pic->ref_count[0] == 0)
hw_base_encode_remove_refs(pic, 1);
}
// Clear out all complete pictures with no remaining references.
prev = NULL;
for (pic = ctx->pic_start; pic; pic = next) {
next = pic->next;
if (pic->encode_complete && pic->ref_count[1] == 0) {
av_assert0(pic->ref_removed[0] && pic->ref_removed[1]);
if (prev)
prev->next = next;
else
ctx->pic_start = next;
ctx->op->free(avctx, pic);
} else {
prev = pic;
}
}
return 0;
}
static int hw_base_encode_check_frame(FFHWBaseEncodeContext *ctx,
const AVFrame *frame)
{
if ((frame->crop_top || frame->crop_bottom ||
frame->crop_left || frame->crop_right) && !ctx->crop_warned) {
av_log(ctx->log_ctx, AV_LOG_WARNING, "Cropping information on input "
"frames ignored due to lack of API support.\n");
ctx->crop_warned = 1;
}
if (!ctx->roi_allowed) {
AVFrameSideData *sd =
av_frame_get_side_data(frame, AV_FRAME_DATA_REGIONS_OF_INTEREST);
if (sd && !ctx->roi_warned) {
av_log(ctx->log_ctx, AV_LOG_WARNING, "ROI side data on input "
"frames ignored due to lack of driver support.\n");
ctx->roi_warned = 1;
}
}
return 0;
}
static int hw_base_encode_send_frame(AVCodecContext *avctx, FFHWBaseEncodeContext *ctx,
AVFrame *frame)
{
FFHWBaseEncodePicture *pic;
int err;
if (frame) {
av_log(avctx, AV_LOG_DEBUG, "Input frame: %ux%u (%"PRId64").\n",
frame->width, frame->height, frame->pts);
err = hw_base_encode_check_frame(ctx, frame);
if (err < 0)
return err;
pic = ctx->op->alloc(avctx, frame);
if (!pic)
return AVERROR(ENOMEM);
pic->input_image = av_frame_alloc();
if (!pic->input_image) {
err = AVERROR(ENOMEM);
goto fail;
}
pic->recon_image = av_frame_alloc();
if (!pic->recon_image) {
err = AVERROR(ENOMEM);
goto fail;
}
if (ctx->input_order == 0 || frame->pict_type == AV_PICTURE_TYPE_I)
pic->force_idr = 1;
pic->pts = frame->pts;
pic->duration = frame->duration;
if (avctx->flags & AV_CODEC_FLAG_COPY_OPAQUE) {
err = av_buffer_replace(&pic->opaque_ref, frame->opaque_ref);
if (err < 0)
goto fail;
pic->opaque = frame->opaque;
}
av_frame_move_ref(pic->input_image, frame);
if (ctx->input_order == 0)
ctx->first_pts = pic->pts;
if (ctx->input_order == ctx->decode_delay)
ctx->dts_pts_diff = pic->pts - ctx->first_pts;
if (ctx->output_delay > 0)
ctx->ts_ring[ctx->input_order %
(3 * ctx->output_delay + ctx->async_depth)] = pic->pts;
pic->display_order = ctx->input_order;
++ctx->input_order;
if (ctx->pic_start) {
ctx->pic_end->next = pic;
ctx->pic_end = pic;
} else {
ctx->pic_start = pic;
ctx->pic_end = pic;
}
} else {
ctx->end_of_stream = 1;
// Fix timestamps if we hit end-of-stream before the initial decode
// delay has elapsed.
if (ctx->input_order < ctx->decode_delay)
ctx->dts_pts_diff = ctx->pic_end->pts - ctx->first_pts;
}
return 0;
fail:
ctx->op->free(avctx, pic);
return err;
}
int ff_hw_base_encode_set_output_property(FFHWBaseEncodeContext *ctx,
AVCodecContext *avctx,
FFHWBaseEncodePicture *pic,
AVPacket *pkt, int flag_no_delay)
{
if (pic->type == FF_HW_PICTURE_TYPE_IDR)
pkt->flags |= AV_PKT_FLAG_KEY;
pkt->pts = pic->pts;
pkt->duration = pic->duration;
// for no-delay encoders this is handled in generic codec
if (avctx->codec->capabilities & AV_CODEC_CAP_DELAY &&
avctx->flags & AV_CODEC_FLAG_COPY_OPAQUE) {
pkt->opaque = pic->opaque;
pkt->opaque_ref = pic->opaque_ref;
pic->opaque_ref = NULL;
}
if (flag_no_delay) {
pkt->dts = pkt->pts;
return 0;
}
if (ctx->output_delay == 0) {
pkt->dts = pkt->pts;
} else if (pic->encode_order < ctx->decode_delay) {
if (ctx->ts_ring[pic->encode_order] < INT64_MIN + ctx->dts_pts_diff)
pkt->dts = INT64_MIN;
else
pkt->dts = ctx->ts_ring[pic->encode_order] - ctx->dts_pts_diff;
} else {
pkt->dts = ctx->ts_ring[(pic->encode_order - ctx->decode_delay) %
(3 * ctx->output_delay + ctx->async_depth)];
}
return 0;
}
int ff_hw_base_encode_receive_packet(FFHWBaseEncodeContext *ctx,
AVCodecContext *avctx, AVPacket *pkt)
{
FFHWBaseEncodePicture *pic = NULL;
AVFrame *frame = ctx->frame;
int err;
av_assert0(ctx->op && ctx->op->alloc && ctx->op->issue &&
ctx->op->output && ctx->op->free);
start:
/** if no B frame before repeat P frame, sent repeat P frame out. */
if (ctx->tail_pkt->size) {
for (FFHWBaseEncodePicture *tmp = ctx->pic_start; tmp; tmp = tmp->next) {
if (tmp->type == FF_HW_PICTURE_TYPE_B && tmp->pts < ctx->tail_pkt->pts)
break;
else if (!tmp->next) {
av_packet_move_ref(pkt, ctx->tail_pkt);
goto end;
}
}
}
err = ff_encode_get_frame(avctx, frame);
if (err == AVERROR_EOF) {
frame = NULL;
} else if (err < 0)
return err;
err = hw_base_encode_send_frame(avctx, ctx, frame);
if (err < 0)
return err;
if (!ctx->pic_start) {
if (ctx->end_of_stream)
return AVERROR_EOF;
else
return AVERROR(EAGAIN);
}
if (ctx->async_encode) {
if (av_fifo_can_write(ctx->encode_fifo)) {
err = hw_base_encode_pick_next(avctx, ctx, &pic);
if (!err) {
av_assert0(pic);
pic->encode_order = ctx->encode_order +
av_fifo_can_read(ctx->encode_fifo);
err = ctx->op->issue(avctx, pic);
if (err < 0) {
av_log(avctx, AV_LOG_ERROR, "Encode failed: %d.\n", err);
return err;
}
pic->encode_issued = 1;
av_fifo_write(ctx->encode_fifo, &pic, 1);
}
}
if (!av_fifo_can_read(ctx->encode_fifo))
return err;
// More frames can be buffered
if (av_fifo_can_write(ctx->encode_fifo) && !ctx->end_of_stream)
return AVERROR(EAGAIN);
av_fifo_read(ctx->encode_fifo, &pic, 1);
ctx->encode_order = pic->encode_order + 1;
} else {
err = hw_base_encode_pick_next(avctx, ctx, &pic);
if (err < 0)
return err;
av_assert0(pic);
pic->encode_order = ctx->encode_order++;
err = ctx->op->issue(avctx, pic);
if (err < 0) {
av_log(avctx, AV_LOG_ERROR, "Encode failed: %d.\n", err);
return err;
}
pic->encode_issued = 1;
}
err = ctx->op->output(avctx, pic, pkt);
if (err < 0) {
av_log(avctx, AV_LOG_ERROR, "Output failed: %d.\n", err);
return err;
}
ctx->output_order = pic->encode_order;
hw_base_encode_clear_old(avctx, ctx);
/** loop to get an available pkt in encoder flushing. */
if (ctx->end_of_stream && !pkt->size)
goto start;
end:
if (pkt->size)
av_log(avctx, AV_LOG_DEBUG, "Output packet: pts %"PRId64", dts %"PRId64", "
"size %d bytes.\n", pkt->pts, pkt->dts, pkt->size);
return 0;
}
int ff_hw_base_init_gop_structure(FFHWBaseEncodeContext *ctx, AVCodecContext *avctx,
uint32_t ref_l0, uint32_t ref_l1,
int flags, int prediction_pre_only)
{
if (flags & FF_HW_FLAG_INTRA_ONLY || avctx->gop_size <= 1) {
av_log(avctx, AV_LOG_VERBOSE, "Using intra frames only.\n");
ctx->gop_size = 1;
} else if (ref_l0 < 1) {
av_log(avctx, AV_LOG_ERROR, "Driver does not support any "
"reference frames.\n");
return AVERROR(EINVAL);
} else if (!(flags & FF_HW_FLAG_B_PICTURES) || ref_l1 < 1 ||
avctx->max_b_frames < 1 || prediction_pre_only) {
if (ctx->p_to_gpb)
av_log(avctx, AV_LOG_VERBOSE, "Using intra and B-frames "
"(supported references: %d / %d).\n",
ref_l0, ref_l1);
else
av_log(avctx, AV_LOG_VERBOSE, "Using intra and P-frames "
"(supported references: %d / %d).\n", ref_l0, ref_l1);
ctx->gop_size = avctx->gop_size;
ctx->p_per_i = INT_MAX;
ctx->b_per_p = 0;
} else {
if (ctx->p_to_gpb)
av_log(avctx, AV_LOG_VERBOSE, "Using intra and B-frames "
"(supported references: %d / %d).\n",
ref_l0, ref_l1);
else
av_log(avctx, AV_LOG_VERBOSE, "Using intra, P- and B-frames "
"(supported references: %d / %d).\n", ref_l0, ref_l1);
ctx->gop_size = avctx->gop_size;
ctx->p_per_i = INT_MAX;
ctx->b_per_p = avctx->max_b_frames;
if (flags & FF_HW_FLAG_B_PICTURE_REFERENCES) {
ctx->max_b_depth = FFMIN(ctx->desired_b_depth,
av_log2(ctx->b_per_p) + 1);
} else {
ctx->max_b_depth = 1;
}
}
if (flags & FF_HW_FLAG_NON_IDR_KEY_PICTURES) {
ctx->closed_gop = !!(avctx->flags & AV_CODEC_FLAG_CLOSED_GOP);
ctx->gop_per_idr = ctx->idr_interval + 1;
} else {
ctx->closed_gop = 1;
ctx->gop_per_idr = 1;
}
return 0;
}
int ff_hw_base_get_recon_format(FFHWBaseEncodeContext *ctx, const void *hwconfig,
enum AVPixelFormat *fmt)
{
AVHWFramesConstraints *constraints = NULL;
enum AVPixelFormat recon_format;
int err, i;
constraints = av_hwdevice_get_hwframe_constraints(ctx->device_ref,
hwconfig);
if (!constraints) {
err = AVERROR(ENOMEM);
goto fail;
}
// Probably we can use the input surface format as the surface format
// of the reconstructed frames. If not, we just pick the first (only?)
// format in the valid list and hope that it all works.
recon_format = AV_PIX_FMT_NONE;
if (constraints->valid_sw_formats) {
for (i = 0; constraints->valid_sw_formats[i] != AV_PIX_FMT_NONE; i++) {
if (ctx->input_frames->sw_format ==
constraints->valid_sw_formats[i]) {
recon_format = ctx->input_frames->sw_format;
break;
}
}
if (recon_format == AV_PIX_FMT_NONE) {
// No match. Just use the first in the supported list and
// hope for the best.
recon_format = constraints->valid_sw_formats[0];
}
} else {
// No idea what to use; copy input format.
recon_format = ctx->input_frames->sw_format;
}
av_log(ctx->log_ctx, AV_LOG_DEBUG, "Using %s as format of "
"reconstructed frames.\n", av_get_pix_fmt_name(recon_format));
if (ctx->surface_width < constraints->min_width ||
ctx->surface_height < constraints->min_height ||
ctx->surface_width > constraints->max_width ||
ctx->surface_height > constraints->max_height) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Hardware does not support encoding at "
"size %dx%d (constraints: width %d-%d height %d-%d).\n",
ctx->surface_width, ctx->surface_height,
constraints->min_width, constraints->max_width,
constraints->min_height, constraints->max_height);
err = AVERROR(EINVAL);
goto fail;
}
*fmt = recon_format;
err = 0;
fail:
av_hwframe_constraints_free(&constraints);
return err;
}
int ff_hw_base_encode_free(FFHWBaseEncodePicture *pic)
{
av_frame_free(&pic->input_image);
av_frame_free(&pic->recon_image);
av_buffer_unref(&pic->opaque_ref);
av_freep(&pic->priv_data);
return 0;
}
int ff_hw_base_encode_init(AVCodecContext *avctx, FFHWBaseEncodeContext *ctx)
{
ctx->log_ctx = (void *)avctx;
ctx->frame = av_frame_alloc();
if (!ctx->frame)
return AVERROR(ENOMEM);
if (!avctx->hw_frames_ctx) {
av_log(avctx, AV_LOG_ERROR, "A hardware frames reference is "
"required to associate the encoding device.\n");
return AVERROR(EINVAL);
}
ctx->input_frames_ref = av_buffer_ref(avctx->hw_frames_ctx);
if (!ctx->input_frames_ref)
return AVERROR(ENOMEM);
ctx->input_frames = (AVHWFramesContext *)ctx->input_frames_ref->data;
ctx->device_ref = av_buffer_ref(ctx->input_frames->device_ref);
if (!ctx->device_ref)
return AVERROR(ENOMEM);
ctx->device = (AVHWDeviceContext *)ctx->device_ref->data;
ctx->tail_pkt = av_packet_alloc();
if (!ctx->tail_pkt)
return AVERROR(ENOMEM);
return 0;
}
int ff_hw_base_encode_close(FFHWBaseEncodeContext *ctx)
{
av_fifo_freep2(&ctx->encode_fifo);
av_frame_free(&ctx->frame);
av_packet_free(&ctx->tail_pkt);
av_buffer_unref(&ctx->device_ref);
av_buffer_unref(&ctx->input_frames_ref);
av_buffer_unref(&ctx->recon_frames_ref);
return 0;
}
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