This source file includes following definitions.
- write_header
- write_muxed_file
- write_packet_pipe
- write_packet
- query_codec
#include "libavutil/intreadwrite.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/dict.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/time_internal.h"
#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "img2.h"
typedef struct VideoMuxData {
const AVClass *class;
int img_number;
int split_planes;
char path[1024];
char tmp[4][1024];
char target[4][1024];
int update;
int use_strftime;
int frame_pts;
const char *muxer;
int use_rename;
AVDictionary *protocol_opts;
} VideoMuxData;
static int write_header(AVFormatContext *s)
{
VideoMuxData *img = s->priv_data;
AVStream *st = s->streams[0];
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(st->codecpar->format);
av_strlcpy(img->path, s->url, sizeof(img->path));
if (st->codecpar->codec_id == AV_CODEC_ID_GIF) {
img->muxer = "gif";
} else if (st->codecpar->codec_id == AV_CODEC_ID_FITS) {
img->muxer = "fits";
} else if (st->codecpar->codec_id == AV_CODEC_ID_RAWVIDEO) {
const char *str = strrchr(img->path, '.');
img->split_planes = str
&& !av_strcasecmp(str + 1, "y")
&& s->nb_streams == 1
&& desc
&&(desc->flags & AV_PIX_FMT_FLAG_PLANAR)
&& desc->nb_components >= 3;
}
return 0;
}
static int write_muxed_file(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
{
VideoMuxData *img = s->priv_data;
AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
AVStream *st;
AVPacket pkt2;
AVFormatContext *fmt = NULL;
int ret;
ret = avformat_alloc_output_context2(&fmt, NULL, img->muxer, s->url);
if (ret < 0)
return ret;
st = avformat_new_stream(fmt, NULL);
if (!st) {
ret = AVERROR(ENOMEM);
goto out;
}
st->id = pkt->stream_index;
fmt->pb = pb;
ret = av_packet_ref(&pkt2, pkt);
if (ret < 0)
goto out;
pkt2.stream_index = 0;
if ((ret = avcodec_parameters_copy(st->codecpar, par)) < 0 ||
(ret = avformat_write_header(fmt, NULL)) < 0 ||
(ret = av_interleaved_write_frame(fmt, &pkt2)) < 0 ||
(ret = av_write_trailer(fmt))) {}
av_packet_unref(&pkt2);
out:
avformat_free_context(fmt);
return ret;
}
static int write_packet_pipe(AVFormatContext *s, AVPacket *pkt)
{
VideoMuxData *img = s->priv_data;
if (img->muxer) {
int ret = write_muxed_file(s, s->pb, pkt);
if (ret < 0)
return ret;
} else {
avio_write(s->pb, pkt->data, pkt->size);
}
img->img_number++;
return 0;
}
static int write_packet(AVFormatContext *s, AVPacket *pkt)
{
VideoMuxData *img = s->priv_data;
AVIOContext *pb[4] = {0};
char filename[1024];
AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(par->format);
int ret, i;
int nb_renames = 0;
AVDictionary *options = NULL;
if (img->update) {
av_strlcpy(filename, img->path, sizeof(filename));
} else if (img->use_strftime) {
time_t now0;
struct tm *tm, tmpbuf;
time(&now0);
tm = localtime_r(&now0, &tmpbuf);
if (!strftime(filename, sizeof(filename), img->path, tm)) {
av_log(s, AV_LOG_ERROR, "Could not get frame filename with strftime\n");
return AVERROR(EINVAL);
}
} else if (img->frame_pts) {
if (av_get_frame_filename2(filename, sizeof(filename), img->path, pkt->pts, AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0) {
av_log(s, AV_LOG_ERROR, "Cannot write filename by pts of the frames.");
return AVERROR(EINVAL);
}
} else if (av_get_frame_filename2(filename, sizeof(filename), img->path,
img->img_number,
AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0 &&
img->img_number > 1) {
av_log(s, AV_LOG_ERROR,
"Could not get frame filename number %d from pattern '%s'. "
"Use '-frames:v 1' for a single image, or '-update' option, or use a pattern such as %%03d within the filename.\n",
img->img_number, img->path);
return AVERROR(EINVAL);
}
for (i = 0; i < 4; i++) {
av_dict_copy(&options, img->protocol_opts, 0);
snprintf(img->tmp[i], sizeof(img->tmp[i]), "%s.tmp", filename);
av_strlcpy(img->target[i], filename, sizeof(img->target[i]));
if (s->io_open(s, &pb[i], img->use_rename ? img->tmp[i] : filename, AVIO_FLAG_WRITE, &options) < 0) {
av_log(s, AV_LOG_ERROR, "Could not open file : %s\n", img->use_rename ? img->tmp[i] : filename);
ret = AVERROR(EIO);
goto fail;
}
if (options) {
av_log(s, AV_LOG_ERROR, "Could not recognize some protocol options\n");
ret = AVERROR(EINVAL);
goto fail;
}
if (!img->split_planes || i+1 >= desc->nb_components)
break;
filename[strlen(filename) - 1] = "UVAx"[i];
}
if (img->use_rename)
nb_renames = i + 1;
if (img->split_planes) {
int ysize = par->width * par->height;
int usize = AV_CEIL_RSHIFT(par->width, desc->log2_chroma_w) * AV_CEIL_RSHIFT(par->height, desc->log2_chroma_h);
if (desc->comp[0].depth >= 9) {
ysize *= 2;
usize *= 2;
}
avio_write(pb[0], pkt->data , ysize);
avio_write(pb[1], pkt->data + ysize , usize);
avio_write(pb[2], pkt->data + ysize + usize, usize);
ff_format_io_close(s, &pb[1]);
ff_format_io_close(s, &pb[2]);
if (desc->nb_components > 3) {
avio_write(pb[3], pkt->data + ysize + 2*usize, ysize);
ff_format_io_close(s, &pb[3]);
}
} else if (img->muxer) {
ret = write_muxed_file(s, pb[0], pkt);
if (ret < 0)
goto fail;
} else {
avio_write(pb[0], pkt->data, pkt->size);
}
avio_flush(pb[0]);
ff_format_io_close(s, &pb[0]);
for (i = 0; i < nb_renames; i++) {
int ret = ff_rename(img->tmp[i], img->target[i], s);
if (ret < 0)
return ret;
}
img->img_number++;
return 0;
fail:
av_dict_free(&options);
for (i = 0; i < FF_ARRAY_ELEMS(pb); i++)
if (pb[i])
ff_format_io_close(s, &pb[i]);
return ret;
}
static int query_codec(enum AVCodecID id, int std_compliance)
{
int i;
for (i = 0; ff_img_tags[i].id != AV_CODEC_ID_NONE; i++)
if (ff_img_tags[i].id == id)
return 1;
return std_compliance < FF_COMPLIANCE_NORMAL;
}
#define OFFSET(x) offsetof(VideoMuxData, x)
#define ENC AV_OPT_FLAG_ENCODING_PARAM
static const AVOption muxoptions[] = {
{ "update", "continuously overwrite one file", OFFSET(update), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
{ "start_number", "set first number in the sequence", OFFSET(img_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, ENC },
{ "strftime", "use strftime for filename", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
{ "frame_pts", "use current frame pts for filename", OFFSET(frame_pts), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
{ "atomic_writing", "write files atomically (using temporary files and renames)", OFFSET(use_rename), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
{ "protocol_opts", "specify protocol options for the opened files", OFFSET(protocol_opts), AV_OPT_TYPE_DICT, {0}, 0, 0, ENC },
{ NULL },
};
#if CONFIG_IMAGE2_MUXER
static const AVClass img2mux_class = {
.class_name = "image2 muxer",
.item_name = av_default_item_name,
.option = muxoptions,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_image2_muxer = {
.name = "image2",
.long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
.extensions = "bmp,dpx,jls,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,"
"ppm,sgi,tga,tif,tiff,jp2,j2c,j2k,xwd,sun,ras,rs,im1,im8,im24,"
"sunras,xbm,xface,pix,y",
.priv_data_size = sizeof(VideoMuxData),
.video_codec = AV_CODEC_ID_MJPEG,
.write_header = write_header,
.write_packet = write_packet,
.query_codec = query_codec,
.flags = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS | AVFMT_NOFILE,
.priv_class = &img2mux_class,
};
#endif
#if CONFIG_IMAGE2PIPE_MUXER
AVOutputFormat ff_image2pipe_muxer = {
.name = "image2pipe",
.long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
.priv_data_size = sizeof(VideoMuxData),
.video_codec = AV_CODEC_ID_MJPEG,
.write_header = write_header,
.write_packet = write_packet_pipe,
.query_codec = query_codec,
.flags = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS
};
#endif