[FFmpeg-cvslog] lavf: add uncodedframecrc test muxer.
Nicolas George
git at videolan.org
Wed Feb 12 00:59:17 CET 2014
ffmpeg | branch: master | Nicolas George <george at nsup.org> | Wed Jan 15 23:08:43 2014 +0100| [dcda5ef1eab52a2392fd8f9ebf51a03052ddfce2] | committer: Nicolas George
lavf: add uncodedframecrc test muxer.
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=dcda5ef1eab52a2392fd8f9ebf51a03052ddfce2
---
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/uncodedframecrcenc.c | 172 ++++++++++++++++++++++++++++++++++++++
3 files changed, 174 insertions(+)
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 72ef8c7..ff98b9b 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -388,6 +388,7 @@ OBJS-$(CONFIG_TRUEHD_MUXER) += rawenc.o
OBJS-$(CONFIG_TTA_DEMUXER) += tta.o apetag.o img2.o
OBJS-$(CONFIG_TTY_DEMUXER) += tty.o sauce.o
OBJS-$(CONFIG_TXD_DEMUXER) += txd.o
+OBJS-$(CONFIG_UNCODEDFRAMECRC_MUXER) += uncodedframecrcenc.o framehash.o
OBJS-$(CONFIG_VC1_DEMUXER) += rawdec.o
OBJS-$(CONFIG_VC1_MUXER) += rawenc.o
OBJS-$(CONFIG_VC1T_DEMUXER) += vc1test.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 195e6fb..6ee2f99 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -284,6 +284,7 @@ void av_register_all(void)
REGISTER_DEMUXER (TTA, tta);
REGISTER_DEMUXER (TXD, txd);
REGISTER_DEMUXER (TTY, tty);
+ REGISTER_MUXER (UNCODEDFRAMECRC, uncodedframecrc);
REGISTER_MUXDEMUX(VC1, vc1);
REGISTER_MUXDEMUX(VC1T, vc1t);
REGISTER_DEMUXER (VIVO, vivo);
diff --git a/libavformat/uncodedframecrcenc.c b/libavformat/uncodedframecrcenc.c
new file mode 100644
index 0000000..414683f
--- /dev/null
+++ b/libavformat/uncodedframecrcenc.c
@@ -0,0 +1,172 @@
+/*
+* Copyright (c) 2013 Nicolas George
+*
+* 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/adler32.h"
+#include "libavutil/avassert.h"
+#include "libavutil/bprint.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/pixdesc.h"
+#include "avformat.h"
+#include "internal.h"
+
+/* Identical to Adler32 when the type is uint8_t. */
+#define DEFINE_CKSUM_LINE(name, type, conv) \
+static void cksum_line_ ## name(unsigned *cksum, void *data, unsigned size) \
+{ \
+ type *p = data; \
+ unsigned a = *cksum & 0xFFFF, b = *cksum >> 16; \
+ for (; size > 0; size--, p++) { \
+ a = (a + (unsigned)(conv)) % 65521; \
+ b = (b + a) % 65521; \
+ } \
+ *cksum = a | (b << 16); \
+}
+
+DEFINE_CKSUM_LINE(u8, uint8_t, *p)
+DEFINE_CKSUM_LINE(s16, int16_t, *p + 0x8000)
+DEFINE_CKSUM_LINE(s32, int32_t, *p + 0x80000000)
+DEFINE_CKSUM_LINE(flt, float, *p * 0x80000000 + 0x80000000)
+DEFINE_CKSUM_LINE(dbl, double, *p * 0x80000000 + 0x80000000)
+
+static void video_frame_cksum(AVBPrint *bp, AVFrame *frame)
+{
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
+ int i, y;
+ uint8_t *data;
+ int linesize[5] = { 0 };
+
+ av_bprintf(bp, ", %d x %d", frame->width, frame->height);
+ if (!desc) {
+ av_bprintf(bp, ", unknown");
+ return;
+ }
+ if (av_image_fill_linesizes(linesize, frame->format, frame->width) < 0)
+ return;
+ av_bprintf(bp, ", %s", desc->name);
+ for (i = 0; linesize[i]; i++) {
+ unsigned cksum = 0;
+ int h = frame->height;
+ if ((i == 1 || i == 2) && desc->nb_components >= 3)
+ h = -((-h) >> desc->log2_chroma_h);
+ data = frame->data[i];
+ for (y = 0; y < h; y++) {
+ cksum = av_adler32_update(cksum, data, linesize[i]);
+ data += frame->linesize[i];
+ }
+ av_bprintf(bp, ", 0x%08x", cksum);
+ }
+}
+
+static void audio_frame_cksum(AVBPrint *bp, AVFrame *frame)
+{
+ int nb_planes, nb_samples, p;
+ const char *name;
+
+ nb_planes = av_frame_get_channels(frame);
+ nb_samples = frame->nb_samples;
+ if (!av_sample_fmt_is_planar(frame->format)) {
+ nb_samples *= nb_planes;
+ nb_planes = 1;
+ }
+ name = av_get_sample_fmt_name(frame->format);
+ av_bprintf(bp, ", %d samples", frame->nb_samples);
+ av_bprintf(bp, ", %s", name ? name : "unknown");
+ for (p = 0; p < nb_planes; p++) {
+ uint32_t cksum = 0;
+ void *d = frame->extended_data[p];
+ switch (frame->format) {
+ case AV_SAMPLE_FMT_U8:
+ case AV_SAMPLE_FMT_U8P:
+ cksum_line_u8(&cksum, d, nb_samples);
+ break;
+ case AV_SAMPLE_FMT_S16:
+ case AV_SAMPLE_FMT_S16P:
+ cksum_line_s16(&cksum, d, nb_samples);
+ break;
+ case AV_SAMPLE_FMT_S32:
+ case AV_SAMPLE_FMT_S32P:
+ cksum_line_s32(&cksum, d, nb_samples);
+ break;
+ case AV_SAMPLE_FMT_FLT:
+ case AV_SAMPLE_FMT_FLTP:
+ cksum_line_flt(&cksum, d, nb_samples);
+ break;
+ case AV_SAMPLE_FMT_DBL:
+ case AV_SAMPLE_FMT_DBLP:
+ cksum_line_dbl(&cksum, d, nb_samples);
+ break;
+ default:
+ av_assert0(!"reached");
+ }
+ av_bprintf(bp, ", 0x%08x", cksum);
+ }
+}
+
+static int write_frame(struct AVFormatContext *s, int stream_index,
+ AVFrame **frame, unsigned flags)
+{
+ AVBPrint bp;
+ int ret = 0;
+ enum AVMediaType type;
+ const char *type_name;
+
+ if ((flags & AV_WRITE_UNCODED_FRAME_QUERY))
+ return 0;
+
+ av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED);
+ av_bprintf(&bp, "%d, %10"PRId64"",
+ stream_index, (*frame)->pts);
+ type = s->streams[stream_index]->codec->codec_type;
+ type_name = av_get_media_type_string(type);
+ av_bprintf(&bp, ", %s", type_name ? type_name : "unknown");
+ switch (type) {
+ case AVMEDIA_TYPE_VIDEO:
+ video_frame_cksum(&bp, *frame);
+ break;
+ case AVMEDIA_TYPE_AUDIO:
+ audio_frame_cksum(&bp, *frame);
+ break;
+ }
+
+ av_bprint_chars(&bp, '\n', 1);
+ if (av_bprint_is_complete(&bp))
+ avio_write(s->pb, bp.str, bp.len);
+ else
+ ret = AVERROR(ENOMEM);
+ av_bprint_finalize(&bp, NULL);
+ return ret;
+}
+
+static int write_packet(struct AVFormatContext *s, AVPacket *pkt)
+{
+ return AVERROR(ENOSYS);
+}
+
+AVOutputFormat ff_uncodedframecrc_muxer = {
+ .name = "uncodedframecrc",
+ .long_name = NULL_IF_CONFIG_SMALL("uncoded framecrc testing"),
+ .audio_codec = AV_CODEC_ID_PCM_S16LE,
+ .video_codec = AV_CODEC_ID_RAWVIDEO,
+ .write_header = ff_framehash_write_header,
+ .write_packet = write_packet,
+ .write_uncoded_frame = write_frame,
+ .flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
+ AVFMT_TS_NEGATIVE,
+};
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