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tests/api: add a test of the samples skipped and discarded by decoders
Decode one PCM packet carrying AV_PKT_DATA_SKIP_SAMPLES and print how many samples are output, for samples skipped at the start of the frame and padding discarded at its end, alone, together, overlapping, and with a padding larger than the frame. The reference records the current behaviour.
This commit is contained in:
Romain Beauxis
committed by
Romain Beauxis
Romain Beauxis
parent
2bb377cc45
commit
9edc0748b6
@@ -9,6 +9,7 @@ APITESTPROGS-yes += api-seek api-dump-stream-meta
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APITESTPROGS-$(call DEMDEC, H263, H263) += api-band
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APITESTPROGS-$(HAVE_THREADS) += api-threadmessage
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APITESTPROGS-$(CONFIG_AVCODEC) += api-enc-info
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APITESTPROGS-$(CONFIG_PCM_S16LE_DECODER) += api-skip-samples
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APITESTPROGS-$(call ALLYES, H261_ENCODER H261_PARSER) += api-enc-parser
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APITESTPROGS += $(APITESTPROGS-yes)
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114
tests/api/api-skip-samples-test.c
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114
tests/api/api-skip-samples-test.c
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@@ -0,0 +1,114 @@
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* Decode one packet carrying AV_PKT_DATA_SKIP_SAMPLES and print how many
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* samples are output, for skips at the start and padding at the end of the
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* frame, alone, together and overlapping.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "libavcodec/avcodec.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/macros.h"
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#define FRAME_SAMPLES 1000
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static int decoded_samples(uint32_t skip, uint32_t discard)
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{
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const AVCodec *codec = avcodec_find_decoder(AV_CODEC_ID_PCM_S16LE);
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AVCodecContext *ctx = NULL;
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AVPacket *pkt = NULL;
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AVFrame *frame = NULL;
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uint8_t *side;
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int nb_samples = 0;
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int ret;
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ctx = avcodec_alloc_context3(codec);
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pkt = av_packet_alloc();
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frame = av_frame_alloc();
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if (!ctx || !pkt || !frame) {
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ret = AVERROR(ENOMEM);
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goto end;
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}
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ctx->sample_rate = 48000;
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ctx->pkt_timebase = (AVRational){ 1, 48000 };
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av_channel_layout_default(&ctx->ch_layout, 1);
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ret = avcodec_open2(ctx, codec, NULL);
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if (ret < 0)
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goto end;
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ret = av_new_packet(pkt, FRAME_SAMPLES * 2);
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if (ret < 0)
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goto end;
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memset(pkt->data, 0, pkt->size);
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pkt->pts = 0;
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side = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
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if (!side) {
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ret = AVERROR(ENOMEM);
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goto end;
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}
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AV_WL32(side, skip);
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AV_WL32(side + 4, discard);
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ret = avcodec_send_packet(ctx, pkt);
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if (ret < 0)
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goto end;
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ret = avcodec_send_packet(ctx, NULL);
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if (ret < 0)
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goto end;
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while ((ret = avcodec_receive_frame(ctx, frame)) >= 0) {
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nb_samples += frame->nb_samples;
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av_frame_unref(frame);
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}
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ret = ret == AVERROR_EOF ? nb_samples : ret;
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end:
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av_frame_free(&frame);
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av_packet_free(&pkt);
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avcodec_free_context(&ctx);
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return ret;
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}
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int main(void)
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{
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static const uint32_t cases[][2] = {
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{ 0, 0 },
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{ 300, 0 },
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{ 0, 400 },
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{ 300, 400 },
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{ 300, 700 },
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{ 300, 800 },
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{ 300, 1100 },
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};
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for (int i = 0; i < FF_ARRAY_ELEMS(cases); i++) {
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int ret = decoded_samples(cases[i][0], cases[i][1]);
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if (ret < 0) {
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fprintf(stderr, "decoding failed: %s\n", av_err2str(ret));
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return 1;
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}
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printf("frame %d skip %4"PRIu32" discard %4"PRIu32": %d samples\n",
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FRAME_SAMPLES, cases[i][0], cases[i][1], ret);
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}
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return 0;
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}
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@@ -7,6 +7,10 @@ fate-api-flac: $(APITESTSDIR)/api-flac-test$(EXESUF)
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fate-api-flac: CMD = run $(APITESTSDIR)/api-flac-test$(EXESUF)
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fate-api-flac: CMP = null
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FATE_API_LIBAVCODEC-$(CONFIG_PCM_S16LE_DECODER) += fate-api-skip-samples
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fate-api-skip-samples: $(APITESTSDIR)/api-skip-samples-test$(EXESUF)
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fate-api-skip-samples: CMD = run $(APITESTSDIR)/api-skip-samples-test$(EXESUF)
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FATE_API_LIBAVCODEC-$(CONFIG_MOVTEXT_ENCODER) += fate-api-movtext
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fate-api-movtext: $(APITESTSDIR)/api-movtext-test$(EXESUF)
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fate-api-movtext: CMD = run $(APITESTSDIR)/api-movtext-test$(EXESUF)
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7
tests/ref/fate/api-skip-samples
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7
tests/ref/fate/api-skip-samples
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@@ -0,0 +1,7 @@
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frame 1000 skip 0 discard 0: 1000 samples
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frame 1000 skip 300 discard 0: 700 samples
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frame 1000 skip 0 discard 400: 600 samples
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frame 1000 skip 300 discard 400: 300 samples
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frame 1000 skip 300 discard 700: 0 samples
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frame 1000 skip 300 discard 800: 700 samples
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frame 1000 skip 300 discard 1100: 700 samples
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