[FFmpeg-devel] [PATCH 4/7] tools: add an AV_CODEC_CAP_ENCODER_RECON_FRAME test tool
Anton Khirnov
anton at khirnov.net
Fri Mar 24 11:14:48 EET 2023
---
Makefile | 2 +
tools/Makefile | 3 +-
tools/enc_recon_frame_test.c | 393 +++++++++++++++++++++++++++++++++++
3 files changed, 397 insertions(+), 1 deletion(-)
create mode 100644 tools/enc_recon_frame_test.c
diff --git a/Makefile b/Makefile
index 1fb742f390..bf1b69f96b 100644
--- a/Makefile
+++ b/Makefile
@@ -67,6 +67,8 @@ tools/target_io_dem_fuzzer$(EXESUF): tools/target_io_dem_fuzzer.o $(FF_DEP_LIBS)
tools/enum_options$(EXESUF): ELIBS = $(FF_EXTRALIBS)
tools/enum_options$(EXESUF): $(FF_DEP_LIBS)
+tools/enc_recon_frame_test$(EXESUF): $(FF_DEP_LIBS)
+tools/enc_recon_frame_test$(EXESUF): ELIBS = $(FF_EXTRALIBS)
tools/scale_slice_test$(EXESUF): $(FF_DEP_LIBS)
tools/scale_slice_test$(EXESUF): ELIBS = $(FF_EXTRALIBS)
tools/sofa2wavs$(EXESUF): ELIBS = $(FF_EXTRALIBS)
diff --git a/tools/Makefile b/tools/Makefile
index 4afa23342d..dee6a41668 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -1,4 +1,4 @@
-TOOLS = enum_options qt-faststart scale_slice_test trasher uncoded_frame
+TOOLS = enc_recon_frame_test enum_options qt-faststart scale_slice_test trasher uncoded_frame
TOOLS-$(CONFIG_LIBMYSOFA) += sofa2wavs
TOOLS-$(CONFIG_ZLIB) += cws2fws
@@ -17,6 +17,7 @@ tools/target_dem_fuzzer.o: tools/target_dem_fuzzer.c
tools/target_io_dem_fuzzer.o: tools/target_dem_fuzzer.c
$(COMPILE_C) -DIO_FLAT=0
+tools/enc_recon_frame_test$(EXESUF): tools/decode_simple.o
tools/venc_data_dump$(EXESUF): tools/decode_simple.o
tools/scale_slice_test$(EXESUF): tools/decode_simple.o
diff --git a/tools/enc_recon_frame_test.c b/tools/enc_recon_frame_test.c
new file mode 100644
index 0000000000..d23accd49d
--- /dev/null
+++ b/tools/enc_recon_frame_test.c
@@ -0,0 +1,393 @@
+/*
+ * copyright (c) 2022 Anton Khirnov <anton at 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 ouput 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;
+}
--
2.39.1
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