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obs-studio/libobs/media-io/video-scaler-ffmpeg.c

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Implement automatic video scaling (if requested) Add a scaler interface (defaults to swscale), and if a separate output wants to use a different scale or format than the default output format, allow a scaler instance to be created automatically for that output, which will then receive the new scaled output.
2014-02-18 12:37:56 -08:00
/******************************************************************************
Copyright (C) 2014 by Hugh Bailey <obs.jim@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#include "../util/bmem.h"
#include "video-scaler.h"
#include <libswscale/swscale.h>
struct video_scaler {
struct SwsContext *swscale;
int src_height;
};
static inline enum AVPixelFormat get_ffmpeg_video_format(
enum video_format format)
{
switch (format) {
case VIDEO_FORMAT_NONE: return AV_PIX_FMT_NONE;
case VIDEO_FORMAT_I420: return AV_PIX_FMT_YUV420P;
case VIDEO_FORMAT_NV12: return AV_PIX_FMT_NV12;
case VIDEO_FORMAT_YVYU: return AV_PIX_FMT_NONE;
case VIDEO_FORMAT_YUY2: return AV_PIX_FMT_YUYV422;
case VIDEO_FORMAT_UYVY: return AV_PIX_FMT_UYVY422;
case VIDEO_FORMAT_RGBA: return AV_PIX_FMT_RGBA;
case VIDEO_FORMAT_BGRA: return AV_PIX_FMT_BGRA;
case VIDEO_FORMAT_BGRX: return AV_PIX_FMT_BGRA;
Add planar YUV 4:4:4 format support Adds the ability to natively output with planar YUV 4:4:4.
2015-04-16 22:52:44 -07:00
case VIDEO_FORMAT_I444: return AV_PIX_FMT_YUV444P;
Implement automatic video scaling (if requested) Add a scaler interface (defaults to swscale), and if a separate output wants to use a different scale or format than the default output format, allow a scaler instance to be created automatically for that output, which will then receive the new scaled output.
2014-02-18 12:37:56 -08:00
}
return AV_PIX_FMT_NONE;
}
static inline int get_ffmpeg_scale_type(enum video_scale_type type)
{
switch (type) {
Implement encoder interface (still preliminary) - Implement OBS encoder interface. It was previously incomplete, but now is reaching some level of completion, though probably should still be considered preliminary. I had originally implemented it so that encoders only have a 'reset' function to reset their parameters, but I felt that having both a 'start' and 'stop' function would be useful. Encoders are now assigned to a specific video/audio media output each rather than implicitely assigned to the main obs video/audio contexts. This allows separate encoder contexts that aren't necessarily assigned to the main video/audio context (which is useful for things such as recording specific sources). Will probably have to do this for regular obs outputs as well. When creating an encoder, you must now explicitely state whether that encoder is an audio or video encoder. Audio and video can optionally be automatically converted depending on what the encoder specifies. When something 'attaches' to an encoder, the first attachment starts the encoder, and the encoder automatically attaches to the media output context associated with it. Subsequent attachments won't have the same effect, they will just start receiving the same encoder data when the next keyframe plays (along with SEI if any). When detaching from the encoder, the last detachment will fully stop the encoder and detach the encoder from the media output context associated with the encoder. SEI must actually be exported separately; because new encoder attachments may not always be at the beginning of the stream, the first keyframe they get must have that SEI data in it. If the encoder has SEI data, it needs only add one small function to simply query that SEI data, and then that data will be handled automatically by libobs for all subsequent encoder attachments. - Implement x264 encoder plugin, move x264 files to separate plugin to separate necessary dependencies. - Change video/audio frame output structures to not use const qualifiers to prevent issues with non-const function usage elsewhere. This was an issue when writing the x264 encoder, as the x264 encoder expects non-const frame data. Change stagesurf_map to return a non-const data type to prevent this as well. - Change full range parameter of video scaler to be an enum rather than boolean
2014-03-16 16:21:34 -07:00
case VIDEO_SCALE_DEFAULT: return SWS_FAST_BILINEAR;
Implement automatic video scaling (if requested) Add a scaler interface (defaults to swscale), and if a separate output wants to use a different scale or format than the default output format, allow a scaler instance to be created automatically for that output, which will then receive the new scaled output.
2014-02-18 12:37:56 -08:00
case VIDEO_SCALE_POINT: return SWS_POINT;
case VIDEO_SCALE_FAST_BILINEAR: return SWS_FAST_BILINEAR;
case VIDEO_SCALE_BILINEAR: return SWS_BILINEAR | SWS_AREA;
case VIDEO_SCALE_BICUBIC: return SWS_BICUBIC;
}
return SWS_POINT;
}
static inline const int *get_ffmpeg_coeffs(enum video_colorspace cs)
{
switch (cs) {
Implement encoder interface (still preliminary) - Implement OBS encoder interface. It was previously incomplete, but now is reaching some level of completion, though probably should still be considered preliminary. I had originally implemented it so that encoders only have a 'reset' function to reset their parameters, but I felt that having both a 'start' and 'stop' function would be useful. Encoders are now assigned to a specific video/audio media output each rather than implicitely assigned to the main obs video/audio contexts. This allows separate encoder contexts that aren't necessarily assigned to the main video/audio context (which is useful for things such as recording specific sources). Will probably have to do this for regular obs outputs as well. When creating an encoder, you must now explicitely state whether that encoder is an audio or video encoder. Audio and video can optionally be automatically converted depending on what the encoder specifies. When something 'attaches' to an encoder, the first attachment starts the encoder, and the encoder automatically attaches to the media output context associated with it. Subsequent attachments won't have the same effect, they will just start receiving the same encoder data when the next keyframe plays (along with SEI if any). When detaching from the encoder, the last detachment will fully stop the encoder and detach the encoder from the media output context associated with the encoder. SEI must actually be exported separately; because new encoder attachments may not always be at the beginning of the stream, the first keyframe they get must have that SEI data in it. If the encoder has SEI data, it needs only add one small function to simply query that SEI data, and then that data will be handled automatically by libobs for all subsequent encoder attachments. - Implement x264 encoder plugin, move x264 files to separate plugin to separate necessary dependencies. - Change video/audio frame output structures to not use const qualifiers to prevent issues with non-const function usage elsewhere. This was an issue when writing the x264 encoder, as the x264 encoder expects non-const frame data. Change stagesurf_map to return a non-const data type to prevent this as well. - Change full range parameter of video scaler to be an enum rather than boolean
2014-03-16 16:21:34 -07:00
case VIDEO_CS_DEFAULT: return sws_getCoefficients(SWS_CS_ITU601);
case VIDEO_CS_601: return sws_getCoefficients(SWS_CS_ITU601);
case VIDEO_CS_709: return sws_getCoefficients(SWS_CS_ITU709);
Implement automatic video scaling (if requested) Add a scaler interface (defaults to swscale), and if a separate output wants to use a different scale or format than the default output format, allow a scaler instance to be created automatically for that output, which will then receive the new scaled output.
2014-02-18 12:37:56 -08:00
}
return sws_getCoefficients(SWS_CS_ITU601);
}
Implement encoder interface (still preliminary) - Implement OBS encoder interface. It was previously incomplete, but now is reaching some level of completion, though probably should still be considered preliminary. I had originally implemented it so that encoders only have a 'reset' function to reset their parameters, but I felt that having both a 'start' and 'stop' function would be useful. Encoders are now assigned to a specific video/audio media output each rather than implicitely assigned to the main obs video/audio contexts. This allows separate encoder contexts that aren't necessarily assigned to the main video/audio context (which is useful for things such as recording specific sources). Will probably have to do this for regular obs outputs as well. When creating an encoder, you must now explicitely state whether that encoder is an audio or video encoder. Audio and video can optionally be automatically converted depending on what the encoder specifies. When something 'attaches' to an encoder, the first attachment starts the encoder, and the encoder automatically attaches to the media output context associated with it. Subsequent attachments won't have the same effect, they will just start receiving the same encoder data when the next keyframe plays (along with SEI if any). When detaching from the encoder, the last detachment will fully stop the encoder and detach the encoder from the media output context associated with the encoder. SEI must actually be exported separately; because new encoder attachments may not always be at the beginning of the stream, the first keyframe they get must have that SEI data in it. If the encoder has SEI data, it needs only add one small function to simply query that SEI data, and then that data will be handled automatically by libobs for all subsequent encoder attachments. - Implement x264 encoder plugin, move x264 files to separate plugin to separate necessary dependencies. - Change video/audio frame output structures to not use const qualifiers to prevent issues with non-const function usage elsewhere. This was an issue when writing the x264 encoder, as the x264 encoder expects non-const frame data. Change stagesurf_map to return a non-const data type to prevent this as well. - Change full range parameter of video scaler to be an enum rather than boolean
2014-03-16 16:21:34 -07:00
static inline int get_ffmpeg_range_type(enum video_range_type type)
{
switch (type) {
case VIDEO_RANGE_DEFAULT: return 0;
case VIDEO_RANGE_PARTIAL: return 0;
case VIDEO_RANGE_FULL: return 1;
}
return 0;
}
Implement automatic video scaling (if requested) Add a scaler interface (defaults to swscale), and if a separate output wants to use a different scale or format than the default output format, allow a scaler instance to be created automatically for that output, which will then receive the new scaled output.
2014-02-18 12:37:56 -08:00
#define FIXED_1_0 (1<<16)
(API Change) Remove pointers from all typedefs Typedef pointers are unsafe. If you do: typedef struct bla *bla_t; then you cannot use it as a constant, such as: const bla_t, because that constant will be to the pointer itself rather than to the underlying data. I admit this was a fundamental mistake that must be corrected. All typedefs that were pointer types will now have their pointers removed from the type itself, and the pointers will be used when they are actually used as variables/parameters/returns instead. This does not break ABI though, which is pretty nice.
2014-09-25 17:44:05 -07:00
int video_scaler_create(video_scaler_t **scaler_out,
Implement automatic video scaling (if requested) Add a scaler interface (defaults to swscale), and if a separate output wants to use a different scale or format than the default output format, allow a scaler instance to be created automatically for that output, which will then receive the new scaled output.
2014-02-18 12:37:56 -08:00
const struct video_scale_info *dst,
const struct video_scale_info *src,
enum video_scale_type type)
{
enum AVPixelFormat format_src = get_ffmpeg_video_format(src->format);
enum AVPixelFormat format_dst = get_ffmpeg_video_format(dst->format);
int scale_type = get_ffmpeg_scale_type(type);
const int *coeff_src = get_ffmpeg_coeffs(src->colorspace);
const int *coeff_dst = get_ffmpeg_coeffs(dst->colorspace);
Implement encoder interface (still preliminary) - Implement OBS encoder interface. It was previously incomplete, but now is reaching some level of completion, though probably should still be considered preliminary. I had originally implemented it so that encoders only have a 'reset' function to reset their parameters, but I felt that having both a 'start' and 'stop' function would be useful. Encoders are now assigned to a specific video/audio media output each rather than implicitely assigned to the main obs video/audio contexts. This allows separate encoder contexts that aren't necessarily assigned to the main video/audio context (which is useful for things such as recording specific sources). Will probably have to do this for regular obs outputs as well. When creating an encoder, you must now explicitely state whether that encoder is an audio or video encoder. Audio and video can optionally be automatically converted depending on what the encoder specifies. When something 'attaches' to an encoder, the first attachment starts the encoder, and the encoder automatically attaches to the media output context associated with it. Subsequent attachments won't have the same effect, they will just start receiving the same encoder data when the next keyframe plays (along with SEI if any). When detaching from the encoder, the last detachment will fully stop the encoder and detach the encoder from the media output context associated with the encoder. SEI must actually be exported separately; because new encoder attachments may not always be at the beginning of the stream, the first keyframe they get must have that SEI data in it. If the encoder has SEI data, it needs only add one small function to simply query that SEI data, and then that data will be handled automatically by libobs for all subsequent encoder attachments. - Implement x264 encoder plugin, move x264 files to separate plugin to separate necessary dependencies. - Change video/audio frame output structures to not use const qualifiers to prevent issues with non-const function usage elsewhere. This was an issue when writing the x264 encoder, as the x264 encoder expects non-const frame data. Change stagesurf_map to return a non-const data type to prevent this as well. - Change full range parameter of video scaler to be an enum rather than boolean
2014-03-16 16:21:34 -07:00
int range_src = get_ffmpeg_range_type(src->range);
int range_dst = get_ffmpeg_range_type(dst->range);
Implement automatic video scaling (if requested) Add a scaler interface (defaults to swscale), and if a separate output wants to use a different scale or format than the default output format, allow a scaler instance to be created automatically for that output, which will then receive the new scaled output.
2014-02-18 12:37:56 -08:00
struct video_scaler *scaler;
int ret;
if (!scaler_out)
return VIDEO_SCALER_FAILED;
if (format_src == AV_PIX_FMT_NONE ||
format_dst == AV_PIX_FMT_NONE)
return VIDEO_SCALER_BAD_CONVERSION;
scaler = bzalloc(sizeof(struct video_scaler));
scaler->src_height = src->height;
scaler->swscale = sws_getCachedContext(NULL,
src->width, src->height, format_src,
dst->width, dst->height, format_dst,
scale_type, NULL, NULL, NULL);
if (!scaler->swscale) {
Be more consistent about log levels LOG_ERROR should be used in places where though recoverable (or at least something that can be handled safely), was unexpected, and may affect the user/application. LOG_WARNING should be used in places where it's not entirely unexpected, is recoverable, and doesn't really affect the user/application.
2014-02-28 19:02:29 -08:00
blog(LOG_ERROR, "video_scaler_create: Could not create "
"swscale");
Implement automatic video scaling (if requested) Add a scaler interface (defaults to swscale), and if a separate output wants to use a different scale or format than the default output format, allow a scaler instance to be created automatically for that output, which will then receive the new scaled output.
2014-02-18 12:37:56 -08:00
goto fail;
}
ret = sws_setColorspaceDetails(scaler->swscale,
Implement encoder interface (still preliminary) - Implement OBS encoder interface. It was previously incomplete, but now is reaching some level of completion, though probably should still be considered preliminary. I had originally implemented it so that encoders only have a 'reset' function to reset their parameters, but I felt that having both a 'start' and 'stop' function would be useful. Encoders are now assigned to a specific video/audio media output each rather than implicitely assigned to the main obs video/audio contexts. This allows separate encoder contexts that aren't necessarily assigned to the main video/audio context (which is useful for things such as recording specific sources). Will probably have to do this for regular obs outputs as well. When creating an encoder, you must now explicitely state whether that encoder is an audio or video encoder. Audio and video can optionally be automatically converted depending on what the encoder specifies. When something 'attaches' to an encoder, the first attachment starts the encoder, and the encoder automatically attaches to the media output context associated with it. Subsequent attachments won't have the same effect, they will just start receiving the same encoder data when the next keyframe plays (along with SEI if any). When detaching from the encoder, the last detachment will fully stop the encoder and detach the encoder from the media output context associated with the encoder. SEI must actually be exported separately; because new encoder attachments may not always be at the beginning of the stream, the first keyframe they get must have that SEI data in it. If the encoder has SEI data, it needs only add one small function to simply query that SEI data, and then that data will be handled automatically by libobs for all subsequent encoder attachments. - Implement x264 encoder plugin, move x264 files to separate plugin to separate necessary dependencies. - Change video/audio frame output structures to not use const qualifiers to prevent issues with non-const function usage elsewhere. This was an issue when writing the x264 encoder, as the x264 encoder expects non-const frame data. Change stagesurf_map to return a non-const data type to prevent this as well. - Change full range parameter of video scaler to be an enum rather than boolean
2014-03-16 16:21:34 -07:00
coeff_src, range_src,
coeff_dst, range_dst,
Implement automatic video scaling (if requested) Add a scaler interface (defaults to swscale), and if a separate output wants to use a different scale or format than the default output format, allow a scaler instance to be created automatically for that output, which will then receive the new scaled output.
2014-02-18 12:37:56 -08:00
0, FIXED_1_0, FIXED_1_0);
if (ret < 0) {
blog(LOG_DEBUG, "video_scaler_create: "
"sws_setColorspaceDetails failed, ignoring");
}
*scaler_out = scaler;
return VIDEO_SCALER_SUCCESS;
fail:
video_scaler_destroy(scaler);
return VIDEO_SCALER_FAILED;
}
(API Change) Remove pointers from all typedefs Typedef pointers are unsafe. If you do: typedef struct bla *bla_t; then you cannot use it as a constant, such as: const bla_t, because that constant will be to the pointer itself rather than to the underlying data. I admit this was a fundamental mistake that must be corrected. All typedefs that were pointer types will now have their pointers removed from the type itself, and the pointers will be used when they are actually used as variables/parameters/returns instead. This does not break ABI though, which is pretty nice.
2014-09-25 17:44:05 -07:00
void video_scaler_destroy(video_scaler_t *scaler)
Implement automatic video scaling (if requested) Add a scaler interface (defaults to swscale), and if a separate output wants to use a different scale or format than the default output format, allow a scaler instance to be created automatically for that output, which will then receive the new scaled output.
2014-02-18 12:37:56 -08:00
{
if (scaler) {
sws_freeContext(scaler->swscale);
bfree(scaler);
}
}
(API Change) Remove pointers from all typedefs Typedef pointers are unsafe. If you do: typedef struct bla *bla_t; then you cannot use it as a constant, such as: const bla_t, because that constant will be to the pointer itself rather than to the underlying data. I admit this was a fundamental mistake that must be corrected. All typedefs that were pointer types will now have their pointers removed from the type itself, and the pointers will be used when they are actually used as variables/parameters/returns instead. This does not break ABI though, which is pretty nice.
2014-09-25 17:44:05 -07:00
bool video_scaler_scale(video_scaler_t *scaler,
Implement automatic video scaling (if requested) Add a scaler interface (defaults to swscale), and if a separate output wants to use a different scale or format than the default output format, allow a scaler instance to be created automatically for that output, which will then receive the new scaled output.
2014-02-18 12:37:56 -08:00
uint8_t *output[], const uint32_t out_linesize[],
const uint8_t *const input[], const uint32_t in_linesize[])
{
if (!scaler)
return false;
int ret = sws_scale(scaler->swscale,
Add mac audio capture - Add CoreAudio device input capture for mac audio capturing. The code should cover just about everything for capturing mac input device audio. Because of the way mac audio is designed, users may have no choice but to obtain the open source soundflower software to capture their mac's desktop audio. It may be necessary for us to distribute it with the program as well. - Hide event backend - Use win32 events for windows - Allow timed waits for events - Fix a few warnings
2014-02-26 22:43:31 -08:00
input, (const int *)in_linesize,
Implement automatic video scaling (if requested) Add a scaler interface (defaults to swscale), and if a separate output wants to use a different scale or format than the default output format, allow a scaler instance to be created automatically for that output, which will then receive the new scaled output.
2014-02-18 12:37:56 -08:00
0, scaler->src_height,
Add mac audio capture - Add CoreAudio device input capture for mac audio capturing. The code should cover just about everything for capturing mac input device audio. Because of the way mac audio is designed, users may have no choice but to obtain the open source soundflower software to capture their mac's desktop audio. It may be necessary for us to distribute it with the program as well. - Hide event backend - Use win32 events for windows - Allow timed waits for events - Fix a few warnings
2014-02-26 22:43:31 -08:00
output, (const int *)out_linesize);
Implement automatic video scaling (if requested) Add a scaler interface (defaults to swscale), and if a separate output wants to use a different scale or format than the default output format, allow a scaler instance to be created automatically for that output, which will then receive the new scaled output.
2014-02-18 12:37:56 -08:00
if (ret <= 0) {
Be more consistent about log levels LOG_ERROR should be used in places where though recoverable (or at least something that can be handled safely), was unexpected, and may affect the user/application. LOG_WARNING should be used in places where it's not entirely unexpected, is recoverable, and doesn't really affect the user/application.
2014-02-28 19:02:29 -08:00
blog(LOG_ERROR, "video_scaler_scale: sws_scale failed: %d",
Implement automatic video scaling (if requested) Add a scaler interface (defaults to swscale), and if a separate output wants to use a different scale or format than the default output format, allow a scaler instance to be created automatically for that output, which will then receive the new scaled output.
2014-02-18 12:37:56 -08:00
ret);
return false;
}
return true;
}