mpv/libmpdemux/demux_nut.c

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#include <stdio.h>
#include <stdlib.h>
#include "config.h"
#include "mp_msg.h"
#include "stream.h"
#include "demuxer.h"
#include "stheader.h"
#define USE_LIBNUT
#ifdef USE_LIBNUT
#include <libnut.h>
typedef struct {
int last_pts; // FIXME
nut_context_t * nut;
nut_stream_header_t * s;
} nut_priv_t;
static size_t mp_read(void * h, size_t len, uint8_t * buf) {
stream_t * stream = (stream_t*)h;
if(stream_eof(stream)) return 0;
//len = MIN(len, 5);
return stream_read(stream, buf, len);
}
static int mp_eof(void * h) {
stream_t * stream = (stream_t*)h;
if(stream_eof(stream)) return 1;
return 0;
}
static off_t mp_seek(void * h, long long pos, int whence) {
stream_t * stream = (stream_t*)h;
if (stream->end_pos < stream_tell(stream))
stream->end_pos = stream_tell(stream);
if (whence == SEEK_CUR) pos += stream_tell(stream);
else if (whence == SEEK_END) pos += stream->end_pos;
else if (whence != SEEK_SET) return -1;
if (pos < stream->end_pos && stream->eof) stream_reset(stream);
if (stream_seek(stream, pos) == 0) return -1;
return pos;
}
#define ID_STRING "nut/multimedia container"
#define ID_LENGTH (strlen(ID_STRING) + 1)
static int nut_check_file(demuxer_t * demuxer) {
uint8_t buf[ID_LENGTH];
if (stream_read(demuxer->stream, buf, ID_LENGTH) != ID_LENGTH) return 0;
if (memcmp(buf, ID_STRING, ID_LENGTH)) return 0;
stream_seek(demuxer->stream, 0);
return DEMUXER_TYPE_NUT;
}
static demuxer_t * demux_open_nut(demuxer_t * demuxer) {
extern int index_mode;
nut_demuxer_opts_t dopts = {
.input = {
.priv = demuxer->stream,
.seek = mp_seek,
.read = mp_read,
.eof = mp_eof,
.file_pos = stream_tell(demuxer->stream),
},
.alloc = { .malloc = NULL },
.read_index = index_mode,
.cache_syncpoints = 1,
};
nut_priv_t * priv = demuxer->priv = calloc(1, sizeof(nut_priv_t));
nut_context_t * nut = priv->nut = nut_demuxer_init(&dopts);
nut_stream_header_t * s;
int ret;
int i;
while ((ret = nut_read_headers(nut, &s, NULL)) == NUT_ERR_EAGAIN);
if (ret) {
mp_msg(MSGT_HEADER, MSGL_ERR, "NUT error: %s\n", nut_error(ret));
nut_demuxer_uninit(nut);
free(priv);
return NULL;
}
priv->s = s;
for (i = 0; s[i].type != -1 && i < 2; i++) switch(s[i].type) {
case NUT_AUDIO_CLASS: {
WAVEFORMATEX *wf =
calloc(sizeof(WAVEFORMATEX) +
s[i].codec_specific_len, 1);
sh_audio_t* sh_audio = new_sh_audio(demuxer, i);
int j;
sh_audio->wf= wf; sh_audio->ds = demuxer->audio;
sh_audio->audio.dwSampleSize = 0; // FIXME
sh_audio->audio.dwScale = s[i].time_base.num;
sh_audio->audio.dwRate = s[i].time_base.den;
sh_audio->format = 0;
for (j = 0; j < s[i].fourcc_len && j < 4; j++)
sh_audio->format |= s[i].fourcc[j]<<(j*8);
sh_audio->channels = s[i].channel_count;
sh_audio->samplerate =
s[i].samplerate_num / s[i].samplerate_denom;
sh_audio->i_bps = 0; // FIXME
wf->wFormatTag = sh_audio->format;
wf->nChannels = s[i].channel_count;
wf->nSamplesPerSec =
s[i].samplerate_num / s[i].samplerate_denom;
wf->nAvgBytesPerSec = 0; // FIXME
wf->nBlockAlign = 0; // FIXME
wf->wBitsPerSample = 0; // FIXME
wf->cbSize = s[i].codec_specific_len;
if (s[i].codec_specific_len)
memcpy(wf + 1, s[i].codec_specific,
s[i].codec_specific_len);
demuxer->audio->id = i;
demuxer->audio->sh= demuxer->a_streams[i];
break;
}
case NUT_VIDEO_CLASS: {
BITMAPINFOHEADER * bih =
calloc(sizeof(BITMAPINFOHEADER) +
s[i].codec_specific_len, 1);
sh_video_t * sh_video = new_sh_video(demuxer, i);
int j;
sh_video->bih = bih;
sh_video->ds = demuxer->video;
sh_video->disp_w = s[i].width;
sh_video->disp_h = s[i].height;
sh_video->video.dwScale = s[i].time_base.num;
sh_video->video.dwRate = s[i].time_base.den;
sh_video->fps = sh_video->video.dwRate/
(float)sh_video->video.dwScale;
sh_video->frametime = 1./sh_video->fps;
sh_video->format = 0;
for (j = 0; j < s[i].fourcc_len && j < 4; j++)
sh_video->format |= s[i].fourcc[j]<<(j*8);
if (!s[i].sample_height) sh_video->aspect = 0;
else sh_video->aspect =
s[i].sample_width / (float)s[i].sample_height;
sh_video->i_bps = 0; // FIXME
bih->biSize = sizeof(BITMAPINFOHEADER) +
s[i].codec_specific_len;
bih->biWidth = s[i].width;
bih->biHeight = s[i].height;
bih->biBitCount = 0; // FIXME
bih->biSizeImage = 0; // FIXME
bih->biCompression = sh_video->format;
if (s[i].codec_specific_len)
memcpy(bih + 1, s[i].codec_specific,
s[i].codec_specific_len);
demuxer->video->id = i;
demuxer->video->sh = demuxer->v_streams[i];
break;
}
}
return demuxer;
}
static int demux_nut_fill_buffer(demuxer_t * demuxer, demux_stream_t * dsds) {
nut_priv_t * priv = demuxer->priv;
nut_context_t * nut = priv->nut;
demux_packet_t *dp;
demux_stream_t *ds;
nut_packet_t pd;
int ret;
double pts;
demuxer->filepos = stream_tell(demuxer->stream);
if (stream_eof(demuxer->stream)) return 0;
while ((ret = nut_read_next_packet(nut, &pd)) == NUT_ERR_EAGAIN);
if (ret) {
if (ret != NUT_ERR_EOF)
mp_msg(MSGT_HEADER, MSGL_ERR, "NUT error: %s\n",
nut_error(ret));
return 0; // fatal error
}
pts = (double)pd.pts * priv->s[pd.stream].time_base.num /
priv->s[pd.stream].time_base.den;
if (pd.stream == demuxer->audio->id) {
ds = demuxer->audio;
if (!demuxer->video->sh) {
((sh_audio_t*)ds->sh)->delay = pts;
}
}
else if (pd.stream == demuxer->video->id) {
ds = demuxer->video;
}
else {
uint8_t buf[pd.len];
while ((ret = nut_read_frame(nut, &pd.len, buf)) == NUT_ERR_EAGAIN);
if (ret) {
mp_msg(MSGT_HEADER, MSGL_ERR, "NUT error: %s\n",
nut_error(ret));
return 0; // fatal error
}
return 1;
}
if (pd.stream == 0) priv->last_pts = pd.pts;
dp = new_demux_packet(pd.len);
dp->pts = pts;
dp->pos = demuxer->filepos;
dp->flags= (pd.flags & NUT_FLAG_KEY) ? 0x10 : 0;
{int len = pd.len;
while ((ret = nut_read_frame(nut, &len, dp->buffer + pd.len-len)) == NUT_ERR_EAGAIN);
}
if (ret) {
mp_msg(MSGT_HEADER, MSGL_ERR, "NUT error: %s\n",
nut_error(ret));
return 0; // fatal error
}
ds_add_packet(ds, dp); // append packet to DS stream
return 1;
}
static void demux_seek_nut(demuxer_t * demuxer, float time_pos, float audio_delay, int flags) {
nut_context_t * nut = ((nut_priv_t*)demuxer->priv)->nut;
nut_priv_t * priv = demuxer->priv;
sh_audio_t * sh_audio = demuxer->audio->sh;
int nutflags = 0;
int ret;
const int tmp[] = { 0, -1 };
if (!(flags & 1)) {
nutflags |= 1; // relative
if (time_pos > 0) nutflags |= 2; // forwards
}
if (flags & 2) // percent
time_pos *= priv->s[0].max_pts *
(double)priv->s[0].time_base.num /
priv->s[0].time_base.den;
while ((ret = nut_seek(nut, time_pos, nutflags, tmp)) == NUT_ERR_EAGAIN);
priv->last_pts = -1;
if (ret) mp_msg(MSGT_HEADER, MSGL_ERR, "NUT error: %s\n", nut_error(ret));
if (sh_audio) resync_audio_stream(sh_audio);
demuxer->filepos = stream_tell(demuxer->stream);
}
static int demux_control_nut(demuxer_t * demuxer, int cmd, void * arg) {
nut_priv_t * priv = demuxer->priv;
switch (cmd) {
case DEMUXER_CTRL_GET_TIME_LENGTH:
*((double *)arg) = priv->s[0].max_pts *
(double)priv->s[0].time_base.num /
priv->s[0].time_base.den;
return DEMUXER_CTRL_OK;
case DEMUXER_CTRL_GET_PERCENT_POS:
if (priv->s[0].max_pts == 0 || priv->last_pts == -1)
return DEMUXER_CTRL_DONTKNOW;
*((int *)arg) = priv->last_pts * 100 /
(double)priv->s[0].max_pts;
return DEMUXER_CTRL_OK;
default:
return DEMUXER_CTRL_NOTIMPL;
}
}
static void demux_close_nut(demuxer_t *demuxer) {
nut_priv_t * priv = demuxer->priv;
if (!priv) return;
nut_demuxer_uninit(priv->nut);
free(demuxer->priv);
demuxer->priv = NULL;
}
demuxer_desc_t demuxer_desc_nut = {
"NUT demuxer",
"nut",
"libnut",
"Oded Shimon (ods15)",
"NUT demuxer, requires libnut",
DEMUXER_TYPE_NUT,
1, // safe check demuxer
nut_check_file,
demux_nut_fill_buffer,
demux_open_nut,
demux_close_nut,
demux_seek_nut,
demux_control_nut
};
#endif // USE_LIBNUT