mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-10 03:19:40 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/ext/vp8/gst/video/gstvideocompat.c
David Schleef 4991d5fef3 vp8: Add encoder/decoder
2010-05-19 19:24:02 +02:00

872 lines
22 KiB
C
Raw Blame History

/*
* Copyright 2007 David A. Schleef
*
* This comes solely from commit 1c3e012fc3e4b9aba19d44855bf8c8bf6ec44cd5
* to gst-plugins-base.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <string.h>
#include "gstvideocompat.h"
#if 0
/**
* gst_video_format_parse_caps:
* @caps: the #GstCaps to parse
* @format: the #GstVideoFormat of the video represented by @caps (output)
* @width: the width of the video represented by @caps (output)
* @height: the height of the video represented by @caps (output)
*
* Determines the #GstVideoFormat of @caps and places it in the location
* pointed to by @format. Extracts the size of the video and places it
* in the location pointed to by @width and @height. If @caps does not
* reprsent one of the raw video formats listed in #GstVideoFormat, the
* function will fail and return FALSE.
*
* Since: 0.10.16
*
* Returns: TRUE if @caps was parsed correctly.
*/
gboolean
gst_video_format_parse_caps (GstCaps * caps, GstVideoFormat * format,
int *width, int *height)
{
GstStructure *structure;
gboolean ok = TRUE;
if (!gst_caps_is_fixed (caps))
return FALSE;
structure = gst_caps_get_structure (caps, 0);
if (format) {
if (gst_structure_has_name (structure, "video/x-raw-yuv")) {
guint32 fourcc;
ok &= gst_structure_get_fourcc (structure, "format", &fourcc);
*format = gst_video_format_from_fourcc (fourcc);
if (*format == GST_VIDEO_FORMAT_UNKNOWN) {
ok = FALSE;
}
#if 0
} else if (gst_structure_has_name (structure, "video/x-raw-rgb")) {
int depth;
int bpp;
int endianness;
int red_mask;
int green_mask;
int blue_mask;
ok &= gst_structure_get_int (structure, "depth", &depth);
ok &= gst_structure_get_int (structure, "bpp", &bpp);
ok &= gst_structure_get_int (structure, "endianness", &endianness);
ok &= gst_structure_get_int (structure, "red_mask", &red_mask);
ok &= gst_structure_get_int (structure, "green_mask", &green_mask);
ok &= gst_structure_get_int (structure, "blue_mask", &blue_mask);
if (depth != 24 || bpp != 32 || endianness != G_BIG_ENDIAN) {
ok = FALSE;
} else {
*format = gst_video_format_from_rgb32_masks (red_mask, green_mask,
blue_mask);
if (*format == GST_VIDEO_FORMAT_UNKNOWN) {
ok = FALSE;
}
}
#endif
} else {
ok = FALSE;
}
}
if (width) {
ok &= gst_structure_get_int (structure, "width", width);
}
if (height) {
ok &= gst_structure_get_int (structure, "height", height);
}
return ok;
}
/**
* gst_video_parse_caps_framerate:
* @caps:
* @fps_n: pointer to numerator of frame rate (output)
* @fps_d: pointer to denominator of frame rate (output)
*
* Extracts the frame rate from @caps and places the values in the locations
* pointed to by @fps_n and @fps_d. Returns TRUE if the values could be
* parsed correctly, FALSE if not.
*
* This function can be used with #GstCaps that have any media type; it
* is not limited to formats handled by #GstVideoFormat.
*
* Since: 0.10.16
*
* Returns: TRUE if @caps was parsed correctly.
*/
gboolean
gst_video_parse_caps_framerate (GstCaps * caps, int *fps_n, int *fps_d)
{
GstStructure *structure;
if (!gst_caps_is_fixed (caps))
return FALSE;
structure = gst_caps_get_structure (caps, 0);
return gst_structure_get_fraction (structure, "framerate", fps_n, fps_d);
}
/**
* gst_video_parse_caps_pixel_aspect_ratio:
* @caps:
* @par_n: pointer to numerator of pixel aspect ratio (output)
* @par_d: pointer to denominator of pixel aspect ratio (output)
*
* Extracts the pixel aspect ratio from @caps and places the values in
* the locations pointed to by @par_n and @par_d. Returns TRUE if the
* values could be parsed correctly, FALSE if not.
*
* This function can be used with #GstCaps that have any media type; it
* is not limited to formats handled by #GstVideoFormat.
*
* Since: 0.10.16
*
* Returns: TRUE if @caps was parsed correctly.
*/
gboolean
gst_video_parse_caps_pixel_aspect_ratio (GstCaps * caps, int *par_n, int *par_d)
{
GstStructure *structure;
if (!gst_caps_is_fixed (caps))
return FALSE;
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_fraction (structure, "pixel-aspect-ratio",
par_n, par_d)) {
*par_n = 1;
*par_d = 1;
}
return TRUE;
}
/**
* gst_video_format_new_caps:
* @format: the #GstVideoFormat describing the raw video format
* @width: width of video
* @height: height of video
* @framerate_n: numerator of frame rate
* @framerate_d: denominator of frame rate
* @par_n: numerator of pixel aspect ratio
* @par_d: denominator of pixel aspect ratio
*
* Creates a new #GstCaps object based on the parameters provided.
*
* Since: 0.10.16
*
* Returns: a new #GstCaps object, or NULL if there was an error
*/
GstCaps *
gst_video_format_new_caps (GstVideoFormat format, int width, int height,
int framerate_n, int framerate_d, int par_n, int par_d)
{
if (gst_video_format_is_yuv (format)) {
return gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC, gst_video_format_to_fourcc (format),
"width", G_TYPE_INT, width,
"height", G_TYPE_INT, height,
"framerate", GST_TYPE_FRACTION, framerate_n, framerate_d,
"pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d, NULL);
}
if (gst_video_format_is_rgb (format)) {
int red_mask;
int blue_mask;
int green_mask;
red_mask =
0xff000000U >> gst_video_format_get_component_offset (format, 0, width,
height);
green_mask =
0xff000000U >> gst_video_format_get_component_offset (format, 1, width,
height);
blue_mask =
0xff000000U >> gst_video_format_get_component_offset (format, 2, width,
height);
return gst_caps_new_simple ("video/x-raw-rgb",
"bpp", G_TYPE_INT, 32,
"depth", G_TYPE_INT, 24,
"endianness", G_TYPE_INT, G_BIG_ENDIAN,
"red_mask", G_TYPE_INT, red_mask,
"green_mask", G_TYPE_INT, green_mask,
"blue_mask", G_TYPE_INT, blue_mask,
"width", G_TYPE_INT, width,
"height", G_TYPE_INT, height,
"framerate", GST_TYPE_FRACTION, framerate_n, framerate_d,
"pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d, NULL);
}
return NULL;
}
/**
* gst_video_format_from_fourcc:
* @fourcc: a FOURCC value representing raw YUV video
*
* Converts a FOURCC value into the corresponding #GstVideoFormat.
* If the FOURCC cannot be represented by #GstVideoFormat,
* #GST_VIDEO_FORMAT_UNKNOWN is returned.
*
* Since: 0.10.16
*
* Returns: the #GstVideoFormat describing the FOURCC value
*/
GstVideoFormat
gst_video_format_from_fourcc (guint32 fourcc)
{
switch (fourcc) {
case GST_MAKE_FOURCC ('I', '4', '2', '0'):
return GST_VIDEO_FORMAT_I420;
case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):
return GST_VIDEO_FORMAT_YV12;
case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
return GST_VIDEO_FORMAT_YUY2;
case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
return GST_VIDEO_FORMAT_UYVY;
case GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'):
return GST_VIDEO_FORMAT_AYUV;
default:
return GST_VIDEO_FORMAT_UNKNOWN;
}
}
/**
* gst_video_format_to_fourcc:
* @format: a #GstVideoFormat video format
*
* Converts a #GstVideoFormat value into the corresponding FOURCC. Only
* a few YUV formats have corresponding FOURCC values. If @format has
* no corresponding FOURCC value, 0 is returned.
*
* Since: 0.10.16
*
* Returns: the FOURCC corresponding to @format
*/
guint32
gst_video_format_to_fourcc (GstVideoFormat format)
{
switch (format) {
case GST_VIDEO_FORMAT_I420:
return GST_MAKE_FOURCC ('I', '4', '2', '0');
case GST_VIDEO_FORMAT_YV12:
return GST_MAKE_FOURCC ('Y', 'V', '1', '2');
case GST_VIDEO_FORMAT_YUY2:
return GST_MAKE_FOURCC ('Y', 'U', 'Y', '2');
case GST_VIDEO_FORMAT_UYVY:
return GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y');
case GST_VIDEO_FORMAT_AYUV:
return GST_MAKE_FOURCC ('A', 'Y', 'U', 'V');
default:
return 0;
}
}
/**
* gst_video_format_from_rgb32_masks:
* @red_mask: red bit mask
* @green_mask: green bit mask
* @blue_mask: blue bit mask
*
* Converts red, green, blue bit masks into the corresponding
* #GstVideoFormat.
*
* Since: 0.10.16
*
* Returns: the #GstVideoFormat corresponding to the bit masks
*/
GstVideoFormat
gst_video_format_from_rgb32_masks (int red_mask, int green_mask, int blue_mask)
{
if (red_mask == 0xff000000 && green_mask == 0x00ff0000 &&
blue_mask == 0x0000ff00) {
return GST_VIDEO_FORMAT_RGBx;
}
if (red_mask == 0x0000ff00 && green_mask == 0x00ff0000 &&
blue_mask == 0xff000000) {
return GST_VIDEO_FORMAT_BGRx;
}
if (red_mask == 0x00ff0000 && green_mask == 0x0000ff00 &&
blue_mask == 0x000000ff) {
return GST_VIDEO_FORMAT_xRGB;
}
if (red_mask == 0x000000ff && green_mask == 0x0000ff00 &&
blue_mask == 0x00ff0000) {
return GST_VIDEO_FORMAT_xBGR;
}
return GST_VIDEO_FORMAT_UNKNOWN;
}
/**
* gst_video_format_is_rgb:
* @format: a #GstVideoFormat
*
* Since: 0.10.16
*
* Returns: TRUE if @format represents RGB video
*/
gboolean
gst_video_format_is_rgb (GstVideoFormat format)
{
switch (format) {
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
case GST_VIDEO_FORMAT_AYUV:
return FALSE;
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_xBGR:
return TRUE;
default:
return FALSE;
}
}
/**
* gst_video_format_is_yuv:
* @format: a #GstVideoFormat
*
* Since: 0.10.16
*
* Returns: TRUE if @format represents YUV video
*/
gboolean
gst_video_format_is_yuv (GstVideoFormat format)
{
switch (format) {
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
case GST_VIDEO_FORMAT_AYUV:
return TRUE;
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_xBGR:
return FALSE;
default:
return FALSE;
}
}
/**
* gst_video_format_has_alpha:
* @format: a #GstVideoFormat
*
* Since: 0.10.16
*
* Returns: TRUE if @format has an alpha channel
*/
gboolean
gst_video_format_has_alpha (GstVideoFormat format)
{
switch (format) {
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
return FALSE;
case GST_VIDEO_FORMAT_AYUV:
return TRUE;
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_xBGR:
return FALSE;
default:
return FALSE;
}
}
/**
* gst_video_format_get_row_stride:
* @format: a #GstVideoFormat
* @component: the component index
* @width: the width of video
*
* Calculates the row stride (number of bytes from one row of pixels to
* the next) for the video component with an index of @component. For
* YUV video, Y, U, and V have component indices of 0, 1, and 2,
* respectively. For RGB video, R, G, and B have component indicies of
* 0, 1, and 2, respectively. Alpha channels, if present, have a component
* index of 3. The @width parameter always represents the width of the
* video, not the component.
*
* Since: 0.10.16
*
* Returns: row stride of component @component
*/
int
gst_video_format_get_row_stride (GstVideoFormat format, int component,
int width)
{
switch (format) {
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
if (component == 0) {
return GST_ROUND_UP_4 (width);
} else {
return GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2);
}
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
return GST_ROUND_UP_4 (width * 2);
case GST_VIDEO_FORMAT_AYUV:
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_xBGR:
return width * 4;
default:
return 0;
}
}
/**
* gst_video_format_get_pixel_stride:
* @format: a #GstVideoFormat
* @component: the component index
*
* Calculates the pixel stride (number of bytes from one pixel to the
* pixel to its immediate left) for the video component with an index
* of @component. See @gst_video_format_get_row_stride for a description
* of the component index.
*
* Since: 0.10.16
*
* Returns: pixel stride of component @component
*/
int
gst_video_format_get_pixel_stride (GstVideoFormat format, int component)
{
switch (format) {
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
return 1;
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
if (component == 0) {
return 2;
} else {
return 4;
}
case GST_VIDEO_FORMAT_AYUV:
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_xBGR:
return 4;
default:
return 0;
}
}
/**
* gst_video_format_get_component_width:
* @format: a #GstVideoFormat
* @component: the component index
* @width: the width of video
*
* Calculates the width of the component. See
* @gst_video_format_get_row_stride for a description
* of the component index.
*
* Since: 0.10.16
*
* Returns: width of component @component
*/
int
gst_video_format_get_component_width (GstVideoFormat format, int component,
int width)
{
switch (format) {
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
if (component == 0) {
return width;
} else {
return GST_ROUND_UP_2 (width) / 2;
}
case GST_VIDEO_FORMAT_AYUV:
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_xBGR:
return width;
default:
return 0;
}
}
/**
* gst_video_format_get_component_height:
* @format: a #GstVideoFormat
* @component: the component index
* @height: the height of video
*
* Calculates the height of the component. See
* @gst_video_format_get_row_stride for a description
* of the component index.
*
* Since: 0.10.16
*
* Returns: height of component @component
*/
int
gst_video_format_get_component_height (GstVideoFormat format, int component,
int height)
{
switch (format) {
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
if (component == 0) {
return height;
} else {
return GST_ROUND_UP_2 (height) / 2;
}
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
case GST_VIDEO_FORMAT_AYUV:
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_xBGR:
return height;
default:
return 0;
}
}
/**
* gst_video_format_get_component_offset:
* @format: a #GstVideoFormat
* @component: the component index
* @width: the width of video
* @height: the height of video
*
* Calculates the offset (in bytes) of the first pixel of the component
* with index @component. For packed formats, this will typically be a
* small integer (0, 1, 2, 3). For planar formats, this will be a
* (relatively) large offset to the beginning of the second or third
* component planes. See @gst_video_format_get_row_stride for a description
* of the component index.
*
* Since: 0.10.16
*
* Returns: offset of component @component
*/
int
gst_video_format_get_component_offset (GstVideoFormat format, int component,
int width, int height)
{
switch (format) {
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
if (component == 0) {
return 0;
} else {
int offset;
offset = GST_ROUND_UP_4 (width) * GST_ROUND_UP_2 (height);
if (component == 2) {
offset += GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2) *
(GST_ROUND_UP_2 (height) / 2);
}
return offset;
}
case GST_VIDEO_FORMAT_YUY2:
if (component == 0)
return 0;
if (component == 1)
return 1;
if (component == 2)
return 3;
return 0;
case GST_VIDEO_FORMAT_UYVY:
if (component == 0)
return 1;
if (component == 1)
return 0;
if (component == 2)
return 2;
return 0;
case GST_VIDEO_FORMAT_AYUV:
if (component == 0)
return 1;
if (component == 1)
return 2;
if (component == 2)
return 3;
if (component == 3)
return 0;
return 0;
case GST_VIDEO_FORMAT_RGBx:
if (component == 0)
return 0;
if (component == 1)
return 1;
if (component == 2)
return 2;
if (component == 3)
return 3;
return 0;
case GST_VIDEO_FORMAT_BGRx:
if (component == 0)
return 2;
if (component == 1)
return 1;
if (component == 2)
return 0;
if (component == 3)
return 3;
return 0;
case GST_VIDEO_FORMAT_xRGB:
if (component == 0)
return 1;
if (component == 1)
return 2;
if (component == 2)
return 3;
if (component == 3)
return 0;
return 0;
case GST_VIDEO_FORMAT_xBGR:
if (component == 0)
return 3;
if (component == 1)
return 2;
if (component == 2)
return 1;
if (component == 3)
return 0;
return 0;
default:
return 0;
}
}
/**
* gst_video_format_get_size:
* @format: a #GstVideoFormat
* @width: the width of video
* @height: the height of video
*
* Calculates the total number of bytes in the raw video format. This
* number should be used when allocating a buffer for raw video.
*
* Since: 0.10.16
*
* Returns: size (in bytes) of raw video format
*/
int
gst_video_format_get_size (GstVideoFormat format, int width, int height)
{
int size;
switch (format) {
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
size = GST_ROUND_UP_4 (width) * GST_ROUND_UP_2 (height);
size += GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2) *
(GST_ROUND_UP_2 (height) / 2) * 2;
return size;
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
return GST_ROUND_UP_4 (width * 2) * height;
case GST_VIDEO_FORMAT_AYUV:
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_xBGR:
return width * 4 * height;
default:
return 0;
}
}
/**
* gst_video_format_convert:
* @format: a #GstVideoFormat
* @width: the width of video
* @height: the height of video
* @fps_n: frame rate numerator
* @fps_d: frame rate denominator
* @src_format: #GstFormat of the @src_value
* @src_value: value to convert
* @dest_format: #GstFormat of the @dest_value
* @dest_value: pointer to destination value
*
* Converts among various #GstFormat types. This function handles
* GST_FORMAT_BYTES, GST_FORMAT_TIME, and GST_FORMAT_DEFAULT. For
* raw video, GST_FORMAT_DEFAULT corresponds to video frames. This
* function can be to handle pad queries of the type GST_QUERY_CONVERT.
*
* Since: 0.10.16
*
* Returns: TRUE if the conversion was successful.
*/
gboolean
gst_video_format_convert (GstVideoFormat format, int width, int height,
int fps_n, int fps_d,
GstFormat src_format, gint64 src_value,
GstFormat dest_format, gint64 * dest_value)
{
gboolean ret = FALSE;
int size;
size = gst_video_format_get_size (format, width, height);
GST_DEBUG ("converting value %" G_GINT64_FORMAT " from %s to %s",
src_value, gst_format_get_name (src_format),
gst_format_get_name (dest_format));
if (src_format == dest_format) {
*dest_value = src_value;
ret = TRUE;
goto done;
}
if (src_value == -1) {
*dest_value = -1;
ret = TRUE;
goto done;
}
/* bytes to frames */
if (src_format == GST_FORMAT_BYTES && dest_format == GST_FORMAT_DEFAULT) {
if (size != 0) {
*dest_value = gst_util_uint64_scale_int (src_value, 1, size);
} else {
GST_WARNING ("blocksize is 0");
*dest_value = 0;
}
ret = TRUE;
goto done;
}
/* frames to bytes */
if (src_format == GST_FORMAT_DEFAULT && dest_format == GST_FORMAT_BYTES) {
*dest_value = gst_util_uint64_scale_int (src_value, size, 1);
ret = TRUE;
goto done;
}
/* time to frames */
if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_DEFAULT) {
if (fps_d != 0) {
*dest_value = gst_util_uint64_scale (src_value,
fps_n, GST_SECOND * fps_d);
} else {
GST_WARNING ("framerate denominator is 0");
*dest_value = 0;
}
ret = TRUE;
goto done;
}
/* frames to time */
if (src_format == GST_FORMAT_DEFAULT && dest_format == GST_FORMAT_TIME) {
if (fps_n != 0) {
*dest_value = gst_util_uint64_scale (src_value,
GST_SECOND * fps_d, fps_n);
} else {
GST_WARNING ("framerate numerator is 0");
*dest_value = 0;
}
ret = TRUE;
goto done;
}
/* time to bytes */
if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
if (fps_d != 0) {
*dest_value = gst_util_uint64_scale (src_value,
fps_n * size, GST_SECOND * fps_d);
} else {
GST_WARNING ("framerate denominator is 0");
*dest_value = 0;
}
ret = TRUE;
goto done;
}
/* bytes to time */
if (src_format == GST_FORMAT_BYTES && dest_format == GST_FORMAT_TIME) {
if (fps_n != 0 && size != 0) {
*dest_value = gst_util_uint64_scale (src_value,
GST_SECOND * fps_d, fps_n * size);
} else {
GST_WARNING ("framerate denominator and/or blocksize is 0");
*dest_value = 0;
}
ret = TRUE;
}
done:
GST_DEBUG ("ret=%d result %" G_GINT64_FORMAT, ret, *dest_value);
return ret;
}
void
gst_adapter_copy (GstAdapter * adapter, guint8 * dest, guint offset, guint size)
{
GSList *g;
int skip;
g_return_if_fail (GST_IS_ADAPTER (adapter));
g_return_if_fail (size > 0);
/* we don't have enough data, return. This is unlikely
* as one usually does an _available() first instead of copying a
* random size. */
if (G_UNLIKELY (offset + size > adapter->size))
return;
skip = adapter->skip;
for (g = adapter->buflist; g && size > 0; g = g_slist_next (g)) {
GstBuffer *buf;
buf = g->data;
if (offset < GST_BUFFER_SIZE (buf) - skip) {
int n;
n = MIN (GST_BUFFER_SIZE (buf) - skip - offset, size);
memcpy (dest, GST_BUFFER_DATA (buf) + skip + offset, n);
dest += n;
offset = 0;
size -= n;
} else {
offset -= GST_BUFFER_SIZE (buf) - skip;
}
skip = 0;
}
}
#endif
Reference in a new issue View git blame Copy permalink