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FFmpeg/libavcodec/hw_base_encode.c
Lynne 3de73f1262
hw_base_encode: make recon_frames_ref optional 
Vulkan supports some stupidly odd hardware, that unfortunately,
most modern GPUs happen to be.
The DPB images for encoders may be required to be preallocated
all at once, and rather than be individual frames, be layers of
a single frame.

As the hw_base_encode code is written with the thought that either
the driver or the device itself supports sane image allocation,
Vulkan does not leave us with this option.

So, in the case that the hardware does not support individual
frames to be used as DPBs, make the DBP frames context optional,
and let the subsystem manage this.
2024-09-09 07:05:42 +02:00

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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 int base_encode_pic_free(FFHWBaseEncodePicture *pic)
{
av_frame_free(&pic->input_image);
av_frame_free(&pic->recon_image);
av_buffer_unref(&pic->opaque_ref);
av_freep(&pic->codec_priv);
av_freep(&pic->priv);
av_free(pic);
return 0;
}
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);
base_encode_pic_free(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 = av_mallocz(sizeof(*pic));
if (!pic)
return AVERROR(ENOMEM);
pic->input_image = av_frame_alloc();
if (!pic->input_image) {
err = AVERROR(ENOMEM);
goto fail;
}
if (ctx->recon_frames_ref) {
pic->recon_image = av_frame_alloc();
if (!pic->recon_image) {
err = AVERROR(ENOMEM);
goto fail;
}
err = av_hwframe_get_buffer(ctx->recon_frames_ref, pic->recon_image, 0);
if (err < 0) {
err = AVERROR(ENOMEM);
goto fail;
}
}
pic->priv = av_mallocz(ctx->op->priv_size);
if (!pic->priv) {
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;
}
err = ctx->op->init(avctx, pic);
if (err < 0)
goto fail;
} 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);
base_encode_pic_free(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->init && 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_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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