[FFmpeg-cvslog] lavc/tests: add a cached bitstream reader test
Anton Khirnov
git at videolan.org
Fri Jan 6 12:08:30 EET 2023
ffmpeg | branch: master | Anton Khirnov <anton at khirnov.net> | Sun Jul 3 11:52:04 2022 +0200| [b6742259bf2e7895c259d629164150df045f3e6f] | committer: Anton Khirnov
lavc/tests: add a cached bitstream reader test
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b6742259bf2e7895c259d629164150df045f3e6f
---
libavcodec/Makefile | 2 +
libavcodec/tests/bitstream_be.c | 19 ++++
libavcodec/tests/bitstream_le.c | 20 ++++
libavcodec/tests/bitstream_template.c | 183 ++++++++++++++++++++++++++++++++++
tests/fate/libavcodec.mak | 10 ++
5 files changed, 234 insertions(+)
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 68669b1b46..651d302442 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -1279,6 +1279,8 @@ SKIPHEADERS-$(CONFIG_ZLIB) += zlib_wrapper.h
TESTPROGS = avcodec \
avpacket \
+ bitstream_be \
+ bitstream_le \
celp_math \
codec_desc \
htmlsubtitles \
diff --git a/libavcodec/tests/bitstream_be.c b/libavcodec/tests/bitstream_be.c
new file mode 100644
index 0000000000..bc562ed3b1
--- /dev/null
+++ b/libavcodec/tests/bitstream_be.c
@@ -0,0 +1,19 @@
+/*
+ * 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 "bitstream_template.c"
diff --git a/libavcodec/tests/bitstream_le.c b/libavcodec/tests/bitstream_le.c
new file mode 100644
index 0000000000..ba9296c95a
--- /dev/null
+++ b/libavcodec/tests/bitstream_le.c
@@ -0,0 +1,20 @@
+/*
+ * 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
+ */
+
+#define BITSTREAM_LE
+#include "bitstream_template.c"
diff --git a/libavcodec/tests/bitstream_template.c b/libavcodec/tests/bitstream_template.c
new file mode 100644
index 0000000000..13e92a31c6
--- /dev/null
+++ b/libavcodec/tests/bitstream_template.c
@@ -0,0 +1,183 @@
+/*
+ * cached bitstream reader test
+ * 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
+ */
+
+#define ASSERT_LEVEL 2
+
+#include "libavutil/avassert.h"
+#include "libavutil/lfg.h"
+#include "libavutil/random_seed.h"
+
+#include "libavcodec/bitstream.h"
+#include "libavcodec/defs.h"
+
+#ifdef BITSTREAM_LE
+#define BITSTREAM_WRITER_LE
+#endif
+#include "libavcodec/put_bits.h"
+
+#define SIZE 157
+
+enum Op {
+ OP_READ,
+ OP_READ_NZ,
+ OP_READ_BIT,
+ OP_READ_63,
+ OP_READ_64,
+ OP_READ_SIGNED,
+ OP_APPLY_SIGN,
+ OP_ALIGN,
+ OP_NB,
+};
+
+int main(int argc, char **argv)
+{
+ BitstreamContext bc;
+ PutBitContext pb;
+ AVLFG lfg;
+
+ uint8_t buf[SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
+ uint8_t dst[SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
+
+ uint32_t random_seed;
+ uint64_t val, val1;
+ int32_t sval;
+ unsigned count;
+
+ /* generate random input, using a given or random seed */
+ if (argc > 1)
+ random_seed = strtoul(argv[1], NULL, 0);
+ else
+ random_seed = av_get_random_seed();
+
+ fprintf(stderr, "Testing with LFG seed: %"PRIu32"\n", random_seed);
+ av_lfg_init(&lfg, random_seed);
+
+ for (unsigned i = 0; i < SIZE; i++)
+ buf[i] = av_lfg_get(&lfg);
+
+ bits_init8 (&bc, buf, SIZE);
+ init_put_bits(&pb, dst, SIZE);
+
+ /* use a random sequence of bitreading operations to transfer data
+ * from BitstreamContext to PutBitContext */
+ while (bits_left(&bc) > 0) {
+ enum Op op = av_lfg_get(&lfg) % OP_NB;
+
+ switch (op) {
+ case OP_READ:
+ count = av_lfg_get(&lfg) % FFMIN(33, bits_left(&bc) + 1);
+ val1 = bits_peek(&bc, count);
+ val = bits_read(&bc, count);
+
+ fprintf(stderr, "%d read %u: %"PRIu64"\n", bits_tell(&bc) - count, count, val);
+
+ av_assert0(val == val1);
+
+ put_bits64(&pb, count, val);
+ break;
+ case OP_READ_NZ:
+ count = av_lfg_get(&lfg) % FFMIN(33, bits_left(&bc) + 1);
+ count = FFMAX(count, 1);
+ val1 = bits_peek_nz(&bc, count);
+ val = bits_read_nz(&bc, count);
+
+ fprintf(stderr, "%d read_nz %u: %"PRIu64"\n", bits_tell(&bc) - count, count, val);
+
+ av_assert0(val == val1);
+
+ put_bits64(&pb, count, val);
+ break;
+ case OP_READ_BIT:
+ val = bits_read_bit(&bc);
+
+ fprintf(stderr, "%d read_bit: %"PRIu64"\n", bits_tell(&bc) - 1, val);
+
+ put_bits(&pb, 1, val);
+ break;
+ case OP_READ_63:
+ count = av_lfg_get(&lfg) % FFMIN(64, bits_left(&bc) + 1);
+ val = bits_read_63(&bc, count);
+
+ fprintf(stderr, "%d read_63 %u: %"PRIu64"\n", bits_tell(&bc) - count, count, val);
+
+ put_bits64(&pb, count, val);
+ break;
+ case OP_READ_64:
+ count = av_lfg_get(&lfg) % FFMIN(65, bits_left(&bc) + 1);
+ val = bits_read_64(&bc, count);
+
+ fprintf(stderr, "%d read_64 %u: %"PRIu64"\n", bits_tell(&bc) - count, count, val);
+
+ put_bits64(&pb, count, val);
+ break;
+ case OP_READ_SIGNED:
+ count = av_lfg_get(&lfg) % FFMIN(33, bits_left(&bc) + 1);
+ sval = bits_read_signed(&bc, count);
+
+ fprintf(stderr, "%d read_signed %u: %"PRId32"\n", bits_tell(&bc) - count, count, sval);
+
+ if (count == 32) put_bits32(&pb, sval);
+ else put_sbits(&pb, count, sval);
+ break;
+ case OP_ALIGN:
+ count = (bits_tell(&bc) + 7) / 8 * 8 - bits_tell(&bc);
+
+ fprintf(stderr, "%d align %u\n", bits_tell(&bc), count);
+
+ put_bits(&pb, count, bits_peek(&bc, count));
+ bits_align(&bc);
+ break;
+ case OP_APPLY_SIGN:
+ if (bits_left(&bc) < 2)
+ continue;
+
+ count = av_lfg_get(&lfg) % FFMIN(32, bits_left(&bc));
+ count = FFMAX(count, 1);
+
+ if (!bits_peek(&bc, count))
+ continue;
+
+ val = bits_read(&bc, count);
+ sval = bits_apply_sign(&bc, val);
+
+ fprintf(stderr, "%d apply_sign %u %"PRId32"\n",
+ bits_tell(&bc) - count - 1, count, sval);
+
+ put_bits64(&pb, count, FFABS(sval));
+ put_bits(&pb, 1, sval < 0);
+
+ break;
+ default:
+ av_assert0(0);
+ }
+ }
+
+ flush_put_bits(&pb);
+
+ for (unsigned i = 0; i < SIZE; i++)
+ if (buf[i] != dst[i]) {
+ fprintf(stderr, "Mismatch at byte %u: %hhu %hhu; seed %"PRIu32"\n",
+ i, buf[i], dst[i], random_seed);
+ return 1;
+ }
+
+ return 0;
+}
diff --git a/tests/fate/libavcodec.mak b/tests/fate/libavcodec.mak
index aa199e0308..8f56fae3a8 100644
--- a/tests/fate/libavcodec.mak
+++ b/tests/fate/libavcodec.mak
@@ -3,6 +3,16 @@ fate-avpacket: libavcodec/tests/avpacket$(EXESUF)
fate-avpacket: CMD = run libavcodec/tests/avpacket$(EXESUF)
fate-avpacket: CMP = null
+FATE_LIBAVCODEC-yes += fate-bitstream-be
+fate-bitstream-be: libavcodec/tests/bitstream_be$(EXESUF)
+fate-bitstream-be: CMD = run libavcodec/tests/bitstream_be$(EXESUF)
+fate-bitstream-be: CMP = null
+
+FATE_LIBAVCODEC-yes += fate-bitstream-le
+fate-bitstream-le: libavcodec/tests/bitstream_le$(EXESUF)
+fate-bitstream-le: CMD = run libavcodec/tests/bitstream_le$(EXESUF)
+fate-bitstream-le: CMP = null
+
FATE_LIBAVCODEC-$(CONFIG_CABAC) += fate-cabac
fate-cabac: libavcodec/tests/cabac$(EXESUF)
fate-cabac: CMD = run libavcodec/tests/cabac$(EXESUF)
More information about the ffmpeg-cvslog
mailing list