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/*
* 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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