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vlc/modules/demux/image.c
Steve Lhomme 5363279805 remove the $Id$ in the source code
2019-01-17 12:21:18 +01:00

756 lines
22 KiB
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/*****************************************************************************
* image.c: Image demuxer
*****************************************************************************
* Copyright (C) 2010 Laurent Aimar
*
* Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_demux.h>
#include <vlc_image.h>
#include "mxpeg_helper.h"
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open (vlc_object_t *);
static void Close(vlc_object_t *);
#define ID_TEXT N_("ES ID")
#define ID_LONGTEXT N_( \
"Set the ID of the elementary stream")
#define GROUP_TEXT N_("Group")
#define GROUP_LONGTEXT N_(\
"Set the group of the elementary stream")
#define DECODE_TEXT N_("Decode")
#define DECODE_LONGTEXT N_( \
"Decode at the demuxer stage")
#define CHROMA_TEXT N_("Forced chroma")
#define CHROMA_LONGTEXT N_( \
"If non empty and image-decode is true, the image will be " \
"converted to the specified chroma.")
#define DURATION_TEXT N_("Duration in seconds")
#define DURATION_LONGTEXT N_( \
"Duration in seconds before simulating an end of file. " \
"A negative value means an unlimited play time.")
#define FPS_TEXT N_("Frame rate")
#define FPS_LONGTEXT N_( \
"Frame rate of the elementary stream produced.")
#define RT_TEXT N_("Real-time")
#define RT_LONGTEXT N_( \
"Use real-time mode suitable for being used as a master input and " \
"real-time input slaves.")
vlc_module_begin()
set_description(N_("Image demuxer"))
set_shortname(N_("Image"))
set_category(CAT_INPUT)
set_subcategory(SUBCAT_INPUT_DEMUX)
add_integer("image-id", -1, ID_TEXT, ID_LONGTEXT, true)
change_safe()
add_integer("image-group", 0, GROUP_TEXT, GROUP_LONGTEXT, true)
change_safe()
add_bool("image-decode", true, DECODE_TEXT, DECODE_LONGTEXT, true)
change_safe()
add_string("image-chroma", "", CHROMA_TEXT, CHROMA_LONGTEXT, true)
change_safe()
add_float("image-duration", 10, DURATION_TEXT, DURATION_LONGTEXT, false)
change_safe()
add_string("image-fps", "10/1", FPS_TEXT, FPS_LONGTEXT, true)
change_safe()
add_bool("image-realtime", false, RT_TEXT, RT_LONGTEXT, true)
change_safe()
set_capability("demux", 10)
set_callbacks(Open, Close)
vlc_module_end()
/*****************************************************************************
* Local prototypes
*****************************************************************************/
typedef struct
{
block_t *data;
es_out_id_t *es;
vlc_tick_t duration;
bool is_realtime;
vlc_tick_t pts_offset;
vlc_tick_t pts_next;
date_t pts;
} demux_sys_t;
static block_t *Load(demux_t *demux)
{
const unsigned max_size = 4096 * 4096 * 8;
uint64_t size;
if (vlc_stream_GetSize(demux->s, &size) == VLC_SUCCESS) {
if (size > max_size) {
msg_Err(demux, "image too large (%"PRIu64" > %u), rejected",
size, max_size);
return NULL;
}
} else
size = max_size;
block_t *block = block_Alloc(size);
if (block == NULL)
return NULL;
ssize_t val = vlc_stream_Read(demux->s, block->p_buffer, size);
if (val < 0) {
block_Release(block);
return NULL;
}
block->i_buffer = val;
return block;
}
static block_t *Decode(demux_t *demux,
video_format_t *fmt, vlc_fourcc_t chroma, block_t *data)
{
image_handler_t *handler = image_HandlerCreate(demux);
if (!handler) {
block_Release(data);
return NULL;
}
video_format_t decoded;
video_format_Init(&decoded, chroma);
picture_t *image = image_Read(handler, data, fmt, &decoded);
image_HandlerDelete(handler);
if (!image)
return NULL;
video_format_Clean(fmt);
*fmt = decoded;
size_t size = 0;
for (int i = 0; i < image->i_planes; i++)
size += image->p[i].i_pitch * image->p[i].i_lines;
data = block_Alloc(size);
if (!data) {
picture_Release(image);
return NULL;
}
size_t offset = 0;
for (int i = 0; i < image->i_planes; i++) {
const plane_t *src = &image->p[i];
for (int y = 0; y < src->i_visible_lines; y++) {
memcpy(&data->p_buffer[offset],
&src->p_pixels[y * src->i_pitch],
src->i_visible_pitch);
offset += src->i_visible_pitch;
}
}
picture_Release(image);
return data;
}
static int Demux(demux_t *demux)
{
demux_sys_t *sys = demux->p_sys;
if (!sys->data)
return VLC_DEMUXER_EOF;
vlc_tick_t deadline;
const vlc_tick_t pts_first = sys->pts_offset + date_Get(&sys->pts);
if (sys->pts_next != VLC_TICK_INVALID) {
deadline = sys->pts_next;
} else if (sys->is_realtime) {
deadline = vlc_tick_now();
const vlc_tick_t max_wait = VLC_TICK_FROM_MS(20);
if (deadline + max_wait < pts_first) {
es_out_SetPCR(demux->out, deadline);
/* That's ugly, but not yet easily fixable */
vlc_tick_wait(deadline + max_wait);
return VLC_DEMUXER_SUCCESS;
}
} else {
deadline = 1 + pts_first;
}
for (;;) {
const vlc_tick_t pts = sys->pts_offset + date_Get(&sys->pts);
if (sys->duration >= 0 && pts >= VLC_TICK_0 + sys->pts_offset + sys->duration)
return VLC_DEMUXER_EOF;
if (pts >= deadline)
return VLC_DEMUXER_SUCCESS;
block_t *data = block_Duplicate(sys->data);
if (!data)
return VLC_DEMUXER_EGENERIC;
data->i_dts =
data->i_pts = VLC_TICK_0 + pts;
es_out_SetPCR(demux->out, data->i_pts);
if(sys->es)
es_out_Send(demux->out, sys->es, data);
else
block_Release(data);
date_Increment(&sys->pts, 1);
}
}
static int Control(demux_t *demux, int query, va_list args)
{
demux_sys_t *sys = demux->p_sys;
switch (query) {
case DEMUX_CAN_SEEK:
*va_arg(args, bool *) = sys->duration >= 0 && !sys->is_realtime;
return VLC_SUCCESS;
case DEMUX_GET_POSITION: {
double *position = va_arg(args, double *);
if (sys->duration > 0)
*position = date_Get(&sys->pts) / (double)sys->duration;
else
*position = 0;
return VLC_SUCCESS;
}
case DEMUX_SET_POSITION: {
if (sys->duration < 0 || sys->is_realtime)
return VLC_EGENERIC;
double position = va_arg(args, double);
date_Set(&sys->pts, position * sys->duration);
return VLC_SUCCESS;
}
case DEMUX_GET_TIME: {
*va_arg(args, vlc_tick_t *) = sys->pts_offset + date_Get(&sys->pts);
return VLC_SUCCESS;
}
case DEMUX_SET_TIME: {
if (sys->duration < 0 || sys->is_realtime)
return VLC_EGENERIC;
vlc_tick_t time = va_arg(args, vlc_tick_t);
date_Set(&sys->pts, VLC_CLIP(time - sys->pts_offset, VLC_TICK_0, sys->duration));
return VLC_SUCCESS;
}
case DEMUX_SET_NEXT_DEMUX_TIME: {
vlc_tick_t pts_next = VLC_TICK_0 + va_arg(args, vlc_tick_t);
if (sys->pts_next == VLC_TICK_INVALID)
sys->pts_offset = pts_next - VLC_TICK_0;
sys->pts_next = pts_next;
return VLC_SUCCESS;
}
case DEMUX_GET_LENGTH: {
*va_arg(args, vlc_tick_t *) = __MAX(sys->duration, 0);
return VLC_SUCCESS;
}
case DEMUX_GET_FPS: {
double *fps = va_arg(args, double *);
*fps = (double)sys->pts.i_divider_num / sys->pts.i_divider_den;
return VLC_SUCCESS;
}
case DEMUX_GET_META:
case DEMUX_HAS_UNSUPPORTED_META:
case DEMUX_GET_ATTACHMENTS:
return VLC_EGENERIC;
case DEMUX_CAN_PAUSE:
case DEMUX_SET_PAUSE_STATE:
case DEMUX_CAN_CONTROL_PACE:
case DEMUX_GET_PTS_DELAY:
return demux_vaControlHelper( demux->s, 0, -1, 0, 1, query, args );
default:
return VLC_EGENERIC;
}
}
static bool IsBmp(stream_t *s)
{
const uint8_t *header;
if (vlc_stream_Peek(s, &header, 18) < 18)
return false;
if (memcmp(header, "BM", 2) &&
memcmp(header, "BA", 2) &&
memcmp(header, "CI", 2) &&
memcmp(header, "CP", 2) &&
memcmp(header, "IC", 2) &&
memcmp(header, "PT", 2))
return false;
uint32_t file_size = GetDWLE(&header[2]);
uint32_t data_offset = GetDWLE(&header[10]);
uint32_t header_size = GetDWLE(&header[14]);
if (file_size != 14 && file_size != 14 + header_size &&
file_size <= data_offset)
return false;
if (data_offset < header_size + 14)
return false;
if (header_size != 12 && header_size < 40)
return false;
return true;
}
static bool IsPcx(stream_t *s)
{
const uint8_t *header;
if (vlc_stream_Peek(s, &header, 66) < 66)
return false;
if (header[0] != 0x0A || /* marker */
(header[1] != 0x00 && header[1] != 0x02 &&
header[1] != 0x03 && header[1] != 0x05) || /* version */
(header[2] != 0 && header[2] != 1) || /* encoding */
(header[3] != 1 && header[3] != 2 &&
header[3] != 4 && header[3] != 8) || /* bits per pixel per plane */
header[64] != 0 || /* reserved */
header[65] == 0 || header[65] > 4) /* plane count */
return false;
if (GetWLE(&header[4]) > GetWLE(&header[8]) || /* xmin vs xmax */
GetWLE(&header[6]) > GetWLE(&header[10])) /* ymin vs ymax */
return false;
return true;
}
static bool IsLbm(stream_t *s)
{
const uint8_t *header;
if (vlc_stream_Peek(s, &header, 12) < 12)
return false;
if (memcmp(&header[0], "FORM", 4) ||
GetDWBE(&header[4]) <= 4 ||
(memcmp(&header[8], "ILBM", 4) && memcmp(&header[8], "PBM ", 4)))
return false;
return true;
}
static bool IsPnmBlank(uint8_t v)
{
return v == ' ' || v == '\t' || v == '\r' || v == '\n';
}
static bool IsPnm(stream_t *s)
{
const uint8_t *header;
int size = vlc_stream_Peek(s, &header, 256);
if (size < 3)
return false;
if (header[0] != 'P' ||
header[1] < '1' || header[1] > '6' ||
!IsPnmBlank(header[2]))
return false;
int number_count = 0;
for (int i = 3, parsing_number = 0; i < size && number_count < 2; i++) {
if (IsPnmBlank(header[i])) {
if (parsing_number) {
parsing_number = 0;
number_count++;
}
} else {
if (header[i] < '0' || header[i] > '9')
break;
parsing_number = 1;
}
}
if (number_count < 2)
return false;
return true;
}
static uint8_t FindJpegMarker(int *position, const uint8_t *data, int size)
{
for (int i = *position; i + 1 < size; i++) {
if (data[i + 0] != 0xff || data[i + 1] == 0x00)
return 0xff;
if (data[i + 1] != 0xff) {
*position = i + 2;
return data[i + 1];
}
}
return 0xff;
}
static bool IsJfif(stream_t *s)
{
const uint8_t *header;
int size = vlc_stream_Peek(s, &header, 256);
int position = 0;
if (FindJpegMarker(&position, header, size) != 0xd8)
return false;
if (FindJpegMarker(&position, header, size) != 0xe0)
return false;
position += 2; /* Skip size */
if (position + 5 > size)
return false;
if (memcmp(&header[position], "JFIF\0", 5))
return false;
return true;
}
static bool IsWebP(stream_t *s)
{
const uint8_t *header;
if (vlc_stream_Peek(s, &header, 20) < 20) /* WebP header size */
return false;
if (memcmp(&header[0], "RIFF", 4))
return false;
/* TODO: support other chunk types */
if (memcmp(&header[8], "WEBPVP8 ", 8))
return false;
/* skip headers */
vlc_stream_Seek(s, 20);
return true;
}
static bool IsSpiff(stream_t *s)
{
const uint8_t *header;
if (vlc_stream_Peek(s, &header, 36) < 36) /* SPIFF header size */
return false;
if (header[0] != 0xff || header[1] != 0xd8 ||
header[2] != 0xff || header[3] != 0xe8)
return false;
if (memcmp(&header[6], "SPIFF\0", 6))
return false;
return true;
}
static bool IsExif(stream_t *s)
{
const uint8_t *header;
ssize_t size = vlc_stream_Peek(s, &header, 256);
if (size == -1)
return false;
int position = 0;
if (FindJpegMarker(&position, header, size) != 0xd8)
return false;
if (FindJpegMarker(&position, header, size) != 0xe1)
return false;
position += 2; /* Skip size */
if (position + 5 > size)
return false;
if (memcmp(&header[position], "Exif\0", 5))
return false;
return true;
}
static bool FindSVGmarker(int *position, const uint8_t *data, const int size, const char *marker)
{
for( int i = *position; i < size; i++)
{
if (memcmp(&data[i], marker, strlen(marker)) == 0)
{
*position = i;
return true;
}
}
return false;
}
static bool IsSVG(stream_t *s)
{
if (s->psz_url == NULL)
return false;
char *ext = strstr(s->psz_url, ".svg");
if (!ext) return false;
const uint8_t *header;
ssize_t size = vlc_stream_Peek(s, &header, 4096);
if (size == -1)
return false;
int position = 0;
const char xml[] = "<?xml version=\"";
if (!FindSVGmarker(&position, header, size, xml))
return false;
if (position != 0)
return false;
const char endxml[] = ">\0";
if (!FindSVGmarker(&position, header, size, endxml))
return false;
if (position <= 15)
return false;
const char svg[] = "<svg";
if (!FindSVGmarker(&position, header, size, svg))
return false;
if (position < 19)
return false;
/* SVG Scalable Vector Graphics image */
/* NOTE: some SVG images have the mimetype set in a meta data section
* and some do not */
return true;
}
static bool IsTarga(stream_t *s)
{
/* The header is not enough to ensure proper detection, we need
* to have a look at the footer. But doing so can be slow. So
* try to avoid it when possible */
const uint8_t *header;
if (vlc_stream_Peek(s, &header, 18) < 18) /* Targa fixed header */
return false;
if (header[1] > 1) /* Color Map Type */
return false;
if ((header[1] != 0 || header[3 + 4] != 0) &&
header[3 + 4] != 8 &&
header[3 + 4] != 15 && header[3 + 4] != 16 &&
header[3 + 4] != 24 && header[3 + 4] != 32)
return false;
if ((header[2] > 3 && header[2] < 9) || header[2] > 11) /* Image Type */
return false;
if (GetWLE(&header[8 + 4]) <= 0 || /* Width */
GetWLE(&header[8 + 6]) <= 0) /* Height */
return false;
if (header[8 + 8] != 8 &&
header[8 + 8] != 15 && header[8 + 8] != 16 &&
header[8 + 8] != 24 && header[8 + 8] != 32)
return false;
if (header[8 + 9] & 0xc0) /* Reserved bits */
return false;
const int64_t size = stream_Size(s);
if (size <= 18 + 26)
return false;
bool can_seek;
if (vlc_stream_Control(s, STREAM_CAN_SEEK, &can_seek) || !can_seek)
return false;
const int64_t position = vlc_stream_Tell(s);
if (vlc_stream_Seek(s, size - 26))
return false;
const uint8_t *footer;
bool is_targa = vlc_stream_Peek(s, &footer, 26) >= 26 &&
!memcmp(&footer[8], "TRUEVISION-XFILE.\x00", 18);
vlc_stream_Seek(s, position);
return is_targa;
}
typedef struct {
vlc_fourcc_t codec;
size_t marker_size;
const uint8_t marker[14];
bool (*detect)(stream_t *s);
} image_format_t;
#define VLC_CODEC_XCF VLC_FOURCC('X', 'C', 'F', ' ')
#define VLC_CODEC_LBM VLC_FOURCC('L', 'B', 'M', ' ')
static const image_format_t formats[] = {
{ .codec = VLC_CODEC_XCF,
.marker_size = 9 + 4 + 1,
.marker = { 'g', 'i', 'm', 'p', ' ', 'x', 'c', 'f', ' ',
'f', 'i', 'l', 'e', '\0' }
},
{ .codec = VLC_CODEC_XCF,
.marker_size = 9 + 4 + 1,
.marker = { 'g', 'i', 'm', 'p', ' ', 'x', 'c', 'f', ' ',
'v', '0', '0', '1', '\0' }
},
{ .codec = VLC_CODEC_XCF,
.marker_size = 9 + 4 + 1,
.marker = { 'g', 'i', 'm', 'p', ' ', 'x', 'c', 'f', ' ',
'v', '0', '0', '2', '\0' }
},
{ .codec = VLC_CODEC_PNG,
.marker_size = 8,
.marker = { 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A }
},
{ .codec = VLC_CODEC_GIF,
.marker_size = 6,
.marker = { 'G', 'I', 'F', '8', '7', 'a' }
},
{ .codec = VLC_CODEC_GIF,
.marker_size = 6,
.marker = { 'G', 'I', 'F', '8', '9', 'a' }
},
/* XXX TIFF detection may be a bit weak */
{ .codec = VLC_CODEC_TIFF,
.marker_size = 4,
.marker = { 'I', 'I', 0x2a, 0x00 },
},
{ .codec = VLC_CODEC_TIFF,
.marker_size = 4,
.marker = { 'M', 'M', 0x00, 0x2a },
},
{ .codec = VLC_CODEC_BMP,
.detect = IsBmp,
},
{ .codec = VLC_CODEC_PCX,
.detect = IsPcx,
},
{ .codec = VLC_CODEC_LBM,
.detect = IsLbm,
},
{ .codec = VLC_CODEC_PNM,
.detect = IsPnm,
},
{ .codec = VLC_CODEC_MXPEG,
.detect = IsMxpeg,
},
{ .codec = VLC_CODEC_JPEG,
.detect = IsJfif,
},
{ .codec = VLC_CODEC_JPEG,
.detect = IsSpiff,
},
{ .codec = VLC_CODEC_JPEG,
.detect = IsExif,
},
{ .codec = VLC_CODEC_WEBP,
.detect = IsWebP,
},
{ .codec = VLC_CODEC_BPG,
.marker_size = 4,
.marker = { 'B', 'P', 'G', 0xFB },
},
{ .codec = VLC_CODEC_SVG,
.detect = IsSVG,
},
{ .codec = VLC_CODEC_TARGA,
.detect = IsTarga,
},
{ .codec = 0 }
};
static int Open(vlc_object_t *object)
{
demux_t *demux = (demux_t*)object;
/* Detect the image type */
const image_format_t *img;
const uint8_t *peek;
ssize_t peek_size = 0;
for (int i = 0; ; i++) {
img = &formats[i];
if (!img->codec)
return VLC_EGENERIC;
if (img->detect) {
if (img->detect(demux->s))
break;
/* detect callbacks can invalidate the current peek buffer */
peek_size = 0;
} else {
if ((size_t) peek_size < img->marker_size)
{
peek_size = vlc_stream_Peek(demux->s, &peek, img->marker_size);
if (peek_size == -1)
return VLC_ENOMEM;
}
if ((size_t) peek_size >= img->marker_size &&
!memcmp(peek, img->marker, img->marker_size))
break;
}
}
msg_Dbg(demux, "Detected image: %s",
vlc_fourcc_GetDescription(VIDEO_ES, img->codec));
if( img->codec == VLC_CODEC_MXPEG )
{
return VLC_EGENERIC; //let avformat demux this file
}
/* Load and if selected decode */
es_format_t fmt;
es_format_Init(&fmt, VIDEO_ES, img->codec);
fmt.video.i_chroma = fmt.i_codec;
block_t *data = Load(demux);
if (data && var_InheritBool(demux, "image-decode")) {
char *string = var_InheritString(demux, "image-chroma");
vlc_fourcc_t chroma = vlc_fourcc_GetCodecFromString(VIDEO_ES, string);
free(string);
data = Decode(demux, &fmt.video, chroma, data);
fmt.i_codec = fmt.video.i_chroma;
}
fmt.i_id = var_InheritInteger(demux, "image-id");
fmt.i_group = var_InheritInteger(demux, "image-group");
if (var_InheritURational(demux,
&fmt.video.i_frame_rate,
&fmt.video.i_frame_rate_base,
"image-fps") ||
fmt.video.i_frame_rate <= 0 || fmt.video.i_frame_rate_base <= 0) {
msg_Err(demux, "Invalid frame rate, using 10/1 instead");
fmt.video.i_frame_rate = 10;
fmt.video.i_frame_rate_base = 1;
}
/* If loadind failed, we still continue to avoid mis-detection
* by other demuxers. */
if (!data)
msg_Err(demux, "Failed to load the image");
/* */
demux_sys_t *sys = malloc(sizeof(*sys));
if (!sys) {
if (data)
block_Release(data);
es_format_Clean(&fmt);
return VLC_ENOMEM;
}
sys->data = data;
sys->es = es_out_Add(demux->out, &fmt);
sys->duration = vlc_tick_from_sec( var_InheritFloat(demux, "image-duration") );
sys->is_realtime = var_InheritBool(demux, "image-realtime");
sys->pts_offset = sys->is_realtime ? vlc_tick_now() : 0;
sys->pts_next = VLC_TICK_INVALID;
date_Init(&sys->pts, fmt.video.i_frame_rate, fmt.video.i_frame_rate_base);
date_Set(&sys->pts, VLC_TICK_0);
es_format_Clean(&fmt);
demux->pf_demux = Demux;
demux->pf_control = Control;
demux->p_sys = sys;
return VLC_SUCCESS;
}
static void Close(vlc_object_t *object)
{
demux_t *demux = (demux_t*)object;
demux_sys_t *sys = demux->p_sys;
if (sys->data)
block_Release(sys->data);
free(sys);
}
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