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ffmpeg/tools/enc_recon_frame_test.c

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/*
* copyright (c) 2022 Anton Khirnov <anton@khirnov.net>
*
* 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
*/
/* A test for AV_CODEC_FLAG_RECON_FRAME
* TODO: dump reconstructed frames to disk */
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include "decode_simple.h"
#include "libavutil/adler32.h"
#include "libavutil/common.h"
#include "libavutil/error.h"
#include "libavutil/frame.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavformat/avformat.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/codec.h"
#include "libswscale/swscale.h"
typedef struct FrameChecksum {
int64_t ts;
uint32_t checksum[4];
} FrameChecksum;
typedef struct PrivData {
AVCodecContext *enc;
AVCodecContext *dec;
int64_t pts_in;
AVPacket *pkt;
AVFrame *frame, *frame_recon;
struct SwsContext *scaler;
FrameChecksum *checksums_decoded;
size_t nb_checksums_decoded;
FrameChecksum *checksums_recon;
size_t nb_checksums_recon;
} PrivData;
static int frame_hash(FrameChecksum **pc, size_t *nb_c, int64_t ts,
const AVFrame *frame)
{
FrameChecksum *c;
int shift_h[4] = { 0 }, shift_v[4] = { 0 };
c = av_realloc_array(*pc, *nb_c + 1, sizeof(*c));
if (!c)
return AVERROR(ENOMEM);
*pc = c;
(*nb_c)++;
c += *nb_c - 1;
memset(c, 0, sizeof(*c));
av_pix_fmt_get_chroma_sub_sample(frame->format, &shift_h[1], &shift_v[1]);
shift_h[2] = shift_h[1];
shift_v[2] = shift_v[1];
c->ts = ts;
for (int p = 0; frame->data[p]; p++) {
const uint8_t *data = frame->data[p];
int linesize = av_image_get_linesize(frame->format, frame->width, p);
uint32_t checksum = 0;
for (int j = 0; j < frame->height >> shift_v[p]; j++) {
checksum = av_adler32_update(checksum, data, linesize);
data += frame->linesize[p];
}
c->checksum[p] = checksum;
}
return 0;
}
static int recon_frame_process(PrivData *pd, const AVPacket *pkt)
{
AVFrame *f = pd->frame_recon;
int ret;
ret = avcodec_receive_frame(pd->enc, f);
if (ret < 0) {
fprintf(stderr, "Error retrieving a reconstructed frame\n");
return ret;
}
// the encoder's internal format (in which the reconsturcted frames are
// exported) may be different from the user-facing pixel format
if (f->format != pd->enc->pix_fmt) {
if (!pd->scaler) {
pd->scaler = sws_getContext(f->width, f->height, f->format,
f->width, f->height, pd->enc->pix_fmt,
SWS_BITEXACT, NULL, NULL, NULL);
if (!pd->scaler)
return AVERROR(ENOMEM);
}
ret = sws_scale_frame(pd->scaler, pd->frame, f);
if (ret < 0) {
fprintf(stderr, "Error converting pixel formats\n");
return ret;
}
av_frame_unref(f);
f = pd->frame;
}
ret = frame_hash(&pd->checksums_recon, &pd->nb_checksums_recon,
pkt->pts, f);
av_frame_unref(f);
return 0;
}
static int process_frame(DecodeContext *dc, AVFrame *frame)
{
PrivData *pd = dc->opaque;
int ret;
if (!avcodec_is_open(pd->enc)) {
if (!frame) {
fprintf(stderr, "No input frames were decoded\n");
return AVERROR_INVALIDDATA;
}
pd->enc->width = frame->width;
pd->enc->height = frame->height;
pd->enc->pix_fmt = frame->format;
pd->enc->thread_count = dc->decoder->thread_count;
pd->enc->thread_type = dc->decoder->thread_type;
// real timestamps do not matter for this test, so we just
// pretend the input is 25fps CFR to avoid any timestamp issues
pd->enc->time_base = (AVRational){ 1, 25 };
ret = avcodec_open2(pd->enc, NULL, NULL);
if (ret < 0) {
fprintf(stderr, "Error opening the encoder\n");
return ret;
}
}
if (frame) {
frame->pts = pd->pts_in++;
// avoid forcing coded frame type
frame->pict_type = AV_PICTURE_TYPE_NONE;
}
ret = avcodec_send_frame(pd->enc, frame);
if (ret < 0) {
fprintf(stderr, "Error submitting a frame for encoding\n");
return ret;
}
while (1) {
AVPacket *pkt = pd->pkt;
ret = avcodec_receive_packet(pd->enc, pkt);
if (ret == AVERROR(EAGAIN))
break;
else if (ret == AVERROR_EOF)
pkt = NULL;
else if (ret < 0) {
fprintf(stderr, "Error receiving a frame from the encoder\n");
return ret;
}
if (pkt) {
ret = recon_frame_process(pd, pkt);
if (ret < 0)
return ret;
}
if (!avcodec_is_open(pd->dec)) {
if (!pkt) {
fprintf(stderr, "No packets were received from the encoder\n");
return AVERROR(EINVAL);
}
pd->dec->width = pd->enc->width;
pd->dec->height = pd->enc->height;
pd->dec->pix_fmt = pd->enc->pix_fmt;
pd->dec->thread_count = dc->decoder->thread_count;
pd->dec->thread_type = dc->decoder->thread_type;
if (pd->enc->extradata_size) {
pd->dec->extradata = av_memdup(pd->enc->extradata,
pd->enc->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!pd->dec->extradata)
return AVERROR(ENOMEM);
}
ret = avcodec_open2(pd->dec, NULL, NULL);
if (ret < 0) {
fprintf(stderr, "Error opening the decoder\n");
return ret;
}
}
ret = avcodec_send_packet(pd->dec, pkt);
if (ret < 0) {
fprintf(stderr, "Error sending a packet to decoder\n");
return ret;
}
while (1) {
ret = avcodec_receive_frame(pd->dec, pd->frame);
if (ret == AVERROR(EAGAIN))
break;
else if (ret == AVERROR_EOF)
return 0;
else if (ret < 0) {
fprintf(stderr, "Error receving a frame from decoder\n");
return ret;
}
ret = frame_hash(&pd->checksums_decoded, &pd->nb_checksums_decoded,
pd->frame->pts, pd->frame);
av_frame_unref(pd->frame);
if (ret < 0)
return ret;
}
}
return 0;
}
static int frame_checksum_compare(const void *a, const void *b)
{
const FrameChecksum *ca = a;
const FrameChecksum *cb = b;
if (ca->ts == cb->ts)
return 0;
return FFSIGN(ca->ts - cb->ts);
}
int main(int argc, char **argv)
{
PrivData pd;
DecodeContext dc;
const char *filename, *enc_name, *enc_opts, *thread_type = NULL, *nb_threads = NULL;
const AVCodec *enc, *dec;
int ret = 0, max_frames = 0;
if (argc < 4) {
fprintf(stderr,
"Usage: %s <input file> <encoder> <encoder options> "
"[<max frame count> [<thread count> <thread type>]\n",
argv[0]);
return 0;
}
filename = argv[1];
enc_name = argv[2];
enc_opts = argv[3];
if (argc >= 5)
max_frames = strtol(argv[4], NULL, 0);
if (argc >= 6)
nb_threads = argv[5];
if (argc >= 7)
thread_type = argv[6];
memset(&dc, 0, sizeof(dc));
memset(&pd, 0, sizeof(pd));
enc = avcodec_find_encoder_by_name(enc_name);
if (!enc) {
fprintf(stderr, "No such encoder: %s\n", enc_name);
return 1;
}
if (!(enc->capabilities & AV_CODEC_CAP_ENCODER_RECON_FRAME)) {
fprintf(stderr, "Encoder '%s' cannot output reconstructed frames\n",
enc->name);
return 1;
}
dec = avcodec_find_decoder(enc->id);
if (!dec) {
fprintf(stderr, "No decoder for: %s\n", avcodec_get_name(enc->id));
return 1;
}
pd.enc = avcodec_alloc_context3(enc);
if (!pd.enc) {
fprintf(stderr, "Error allocating encoder\n");
return 1;
}
ret = av_set_options_string(pd.enc, enc_opts, "=", ",");
if (ret < 0) {
fprintf(stderr, "Error setting encoder options\n");
goto fail;
}
pd.enc->flags |= AV_CODEC_FLAG_RECON_FRAME | AV_CODEC_FLAG_BITEXACT;
pd.dec = avcodec_alloc_context3(dec);
if (!pd.dec) {
fprintf(stderr, "Error allocating decoder\n");
goto fail;
}
pd.dec->flags |= AV_CODEC_FLAG_BITEXACT;
pd.dec->err_recognition |= AV_EF_CRCCHECK;
pd.frame = av_frame_alloc();
pd.frame_recon = av_frame_alloc();
pd.pkt = av_packet_alloc();
if (!pd.frame ||!pd.frame_recon || !pd.pkt) {
ret = 1;
goto fail;
}
ret = ds_open(&dc, filename, 0);
if (ret < 0) {
fprintf(stderr, "Error opening the file\n");
goto fail;
}
dc.process_frame = process_frame;
dc.opaque = &pd;
dc.max_frames = max_frames;
ret = av_dict_set(&dc.decoder_opts, "threads", nb_threads, 0);
ret |= av_dict_set(&dc.decoder_opts, "thread_type", thread_type, 0);
ret = ds_run(&dc);
if (ret < 0)
goto fail;
if (pd.nb_checksums_decoded != pd.nb_checksums_recon) {
fprintf(stderr, "Mismatching frame counts: recon=%zu decoded=%zu\n",
pd.nb_checksums_recon, pd.nb_checksums_decoded);
ret = 1;
goto fail;
}
// reconstructed frames are in coded order, sort them by pts into presentation order
qsort(pd.checksums_recon, pd.nb_checksums_recon, sizeof(*pd.checksums_recon),
frame_checksum_compare);
for (size_t i = 0; i < pd.nb_checksums_decoded; i++) {
const FrameChecksum *d = &pd.checksums_decoded[i];
const FrameChecksum *r = &pd.checksums_recon[i];
for (int p = 0; p < FF_ARRAY_ELEMS(d->checksum); p++)
if (d->checksum[p] != r->checksum[p]) {
fprintf(stderr, "Checksum mismatch in frame ts=%"PRId64", plane %d\n",
d->ts, p);
ret = 1;
goto fail;
}
}
fprintf(stderr, "All %zu encoded frames match\n", pd.nb_checksums_decoded);
fail:
avcodec_free_context(&pd.enc);
avcodec_free_context(&pd.dec);
av_freep(&pd.checksums_decoded);
av_freep(&pd.checksums_recon);
av_frame_free(&pd.frame);
av_frame_free(&pd.frame_recon);
av_packet_free(&pd.pkt);
ds_free(&dc);
return !!ret;
}
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