gstreamer/subprojects/gst-plugins-bad/gst/rtmp2/rtmp/rtmputils.c

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/* GStreamer RTMP Library
* Copyright (C) 2013 David Schleef <ds@schleef.org>
* Copyright (C) 2017 Make.TV, Inc. <info@make.tv>
* Contact: Jan Alexander Steffens (heftig) <jsteffens@make.tv>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Suite 500,
* Boston, MA 02110-1335, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "rtmputils.h"
#include <string.h>
static void read_all_bytes_done (GObject * source, GAsyncResult * result,
gpointer user_data);
static void write_all_bytes_done (GObject * source, GAsyncResult * result,
gpointer user_data);
static void write_all_buffer_done (GObject * source, GAsyncResult * result,
gpointer user_data);
void
gst_rtmp_byte_array_append_bytes (GByteArray * bytearray, GBytes * bytes)
{
const guint8 *data;
gsize size;
guint offset;
g_return_if_fail (bytearray);
offset = bytearray->len;
data = g_bytes_get_data (bytes, &size);
g_return_if_fail (data);
g_byte_array_set_size (bytearray, offset + size);
memcpy (bytearray->data + offset, data, size);
}
void
gst_rtmp_input_stream_read_all_bytes_async (GInputStream * stream, gsize count,
int io_priority, GCancellable * cancellable, GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
GByteArray *ba;
g_return_if_fail (G_IS_INPUT_STREAM (stream));
task = g_task_new (stream, cancellable, callback, user_data);
ba = g_byte_array_sized_new (count);
g_byte_array_set_size (ba, count);
g_task_set_task_data (task, ba, (GDestroyNotify) g_byte_array_unref);
g_input_stream_read_all_async (stream, ba->data, count, io_priority,
cancellable, read_all_bytes_done, task);
}
static void
read_all_bytes_done (GObject * source, GAsyncResult * result,
gpointer user_data)
{
GInputStream *is = G_INPUT_STREAM (source);
GTask *task = user_data;
GByteArray *ba = g_task_get_task_data (task);
GError *error = NULL;
gboolean res;
gsize bytes_read;
GBytes *bytes;
res = g_input_stream_read_all_finish (is, result, &bytes_read, &error);
if (!res) {
g_task_return_error (task, error);
g_object_unref (task);
return;
}
g_byte_array_set_size (ba, bytes_read);
bytes = g_byte_array_free_to_bytes (g_byte_array_ref (ba));
g_task_return_pointer (task, bytes, (GDestroyNotify) g_bytes_unref);
g_object_unref (task);
}
GBytes *
gst_rtmp_input_stream_read_all_bytes_finish (GInputStream * stream,
GAsyncResult * result, GError ** error)
{
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
return g_task_propagate_pointer (G_TASK (result), error);
}
void
gst_rtmp_output_stream_write_all_bytes_async (GOutputStream * stream,
GBytes * bytes, int io_priority, GCancellable * cancellable,
GAsyncReadyCallback callback, gpointer user_data)
{
GTask *task;
const void *data;
gsize size;
g_return_if_fail (G_IS_OUTPUT_STREAM (stream));
g_return_if_fail (bytes);
data = g_bytes_get_data (bytes, &size);
g_return_if_fail (data);
task = g_task_new (stream, cancellable, callback, user_data);
g_task_set_task_data (task, g_bytes_ref (bytes),
(GDestroyNotify) g_bytes_unref);
g_output_stream_write_all_async (stream, data, size, io_priority,
cancellable, write_all_bytes_done, task);
}
static void
write_all_bytes_done (GObject * source, GAsyncResult * result,
gpointer user_data)
{
GOutputStream *os = G_OUTPUT_STREAM (source);
GTask *task = user_data;
GError *error = NULL;
gboolean res;
res = g_output_stream_write_all_finish (os, result, NULL, &error);
if (!res) {
g_task_return_error (task, error);
g_object_unref (task);
return;
}
g_task_return_boolean (task, TRUE);
g_object_unref (task);
}
gboolean
gst_rtmp_output_stream_write_all_bytes_finish (GOutputStream * stream,
GAsyncResult * result, GError ** error)
{
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
return g_task_propagate_boolean (G_TASK (result), error);
}
typedef struct
{
GstBuffer *buffer;
GstMapInfo map;
gboolean mapped;
gsize bytes_written;
} WriteAllBufferData;
static WriteAllBufferData *
write_all_buffer_data_new (GstBuffer * buffer)
{
WriteAllBufferData *data = g_new0 (WriteAllBufferData, 1);
data->buffer = gst_buffer_ref (buffer);
return data;
}
static void
write_all_buffer_data_free (gpointer ptr)
{
WriteAllBufferData *data = ptr;
if (data->mapped) {
gst_buffer_unmap (data->buffer, &data->map);
}
g_clear_pointer (&data->buffer, gst_buffer_unref);
g_free (data);
}
void
gst_rtmp_output_stream_write_all_buffer_async (GOutputStream * stream,
GstBuffer * buffer, int io_priority, GCancellable * cancellable,
GAsyncReadyCallback callback, gpointer user_data)
{
GTask *task;
WriteAllBufferData *data;
g_return_if_fail (G_IS_OUTPUT_STREAM (stream));
g_return_if_fail (GST_IS_BUFFER (buffer));
task = g_task_new (stream, cancellable, callback, user_data);
data = write_all_buffer_data_new (buffer);
g_task_set_task_data (task, data, write_all_buffer_data_free);
if (!gst_buffer_map (buffer, &data->map, GST_MAP_READ)) {
g_task_return_new_error (task, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_READ,
"Failed to map buffer for reading");
g_object_unref (task);
return;
}
data->mapped = TRUE;
g_output_stream_write_all_async (stream, data->map.data, data->map.size,
io_priority, cancellable, write_all_buffer_done, task);
}
static void
write_all_buffer_done (GObject * source, GAsyncResult * result,
gpointer user_data)
{
GOutputStream *os = G_OUTPUT_STREAM (source);
GTask *task = user_data;
WriteAllBufferData *data = g_task_get_task_data (task);
GError *error = NULL;
gboolean res;
res = g_output_stream_write_all_finish (os, result, &data->bytes_written,
&error);
gst_buffer_unmap (data->buffer, &data->map);
data->mapped = FALSE;
if (!res) {
g_task_return_error (task, error);
g_object_unref (task);
return;
}
g_task_return_boolean (task, TRUE);
g_object_unref (task);
}
gboolean
gst_rtmp_output_stream_write_all_buffer_finish (GOutputStream * stream,
GAsyncResult * result, gsize * bytes_written, GError ** error)
{
WriteAllBufferData *data;
GTask *task;
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
task = G_TASK (result);
data = g_task_get_task_data (task);
if (bytes_written) {
*bytes_written = data->bytes_written;
}
return g_task_propagate_boolean (task, error);
}
static const gchar ascii_table[128] = {
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
' ', '!', 0x0, '#', '$', '%', '&', '\'',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
'X', 'Y', 'Z', '[', 0x0, ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', 0x0,
};
static const gchar ascii_escapes[128] = {
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 'a',
'b', 't', 'n', 'v', 'f', 'r', 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, '"', 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, '\\', 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
};
void
gst_rtmp_string_print_escaped (GString * string, const gchar * data,
gssize size)
{
gssize i;
g_return_if_fail (string);
if (!data) {
g_string_append (string, "(NULL)");
return;
}
g_string_append_c (string, '"');
for (i = 0; size < 0 ? data[i] != 0 : i < size; i++) {
guchar c = data[i];
if (G_LIKELY (c < G_N_ELEMENTS (ascii_table))) {
if (ascii_table[c]) {
g_string_append_c (string, c);
continue;
}
if (ascii_escapes[c]) {
g_string_append_c (string, '\\');
g_string_append_c (string, ascii_escapes[c]);
continue;
}
} else {
gunichar uc = g_utf8_get_char_validated (data + i,
size < 0 ? -1 : size - i);
if (uc != (gunichar) (-2) && uc != (gunichar) (-1)) {
if (g_unichar_isprint (uc)) {
g_string_append_unichar (string, uc);
} else if (uc <= G_MAXUINT16) {
g_string_append_printf (string, "\\u%04X", uc);
} else {
g_string_append_printf (string, "\\U%08X", uc);
}
i += g_utf8_skip[c] - 1;
continue;
}
}
g_string_append_printf (string, "\\x%02X", c);
}
g_string_append_c (string, '"');
}
gboolean
gst_rtmp_flv_tag_parse_header (GstRtmpFlvTagHeader * header,
const guint8 * data, gsize size)
{
g_return_val_if_fail (header, FALSE);
g_return_val_if_fail (data, FALSE);
/* Parse FLVTAG header as described in
* video_file_format_spec_v10.pdf page 5 (page 9 of the PDF) */
if (size < GST_RTMP_FLV_TAG_HEADER_SIZE) {
return FALSE;
}
/* TagType UI8 */
header->type = GST_READ_UINT8 (data);
/* DataSize UI24 */
header->payload_size = GST_READ_UINT24_BE (data + 1);
/* 4 bytes for the PreviousTagSize UI32 following every tag */
header->total_size = GST_RTMP_FLV_TAG_HEADER_SIZE + header->payload_size + 4;
/* Timestamp UI24 + TimestampExtended UI8 */
header->timestamp = GST_READ_UINT24_BE (data + 4);
header->timestamp |= (guint32) GST_READ_UINT8 (data + 7) << 24;
/* Skip StreamID UI24. It's "always 0" for FLV files and for aggregated RTMP
* messages we're supposed to use the Stream ID from the AGGREGATE. */
return TRUE;
}