mirror of
https://github.com/mpv-player/mpv
synced 2024-12-22 23:02:37 +00:00
8751a0e261
mplayer's video chain traditionally used FourCCs for pixel formats. For example, it used IMGFMT_YV12 for 4:2:0 YUV, which was defined to the string 'YV12' interpreted as unsigned int. Additionally, it used to encode information into the numeric values of some formats. The RGB formats had their bit depth and endian encoded into the least significant byte. Extended planar formats (420P10 etc.) had chroma shift, endian, and component bit depth encoded. (This has been removed in recent commits.) Replace the FourCC mess with a simple enum. Remove all the redundant formats like YV12/I420/IYUV. Replace some image format names by something more intuitive, most importantly IMGFMT_YV12 -> IMGFMT_420P. Add img_fourcc.h, which contains the old IDs for code that actually uses FourCCs. Change the way demuxers, that output raw video, identify the video format: they set either MP_FOURCC_RAWVIDEO or MP_FOURCC_IMGFMT to request the rawvideo decoder, and sh_video->imgfmt specifies the pixel format. Like the previous hack, this is supposed to avoid the need for a complete codecs.cfg entry per format, or other lookup tables. (Note that the RGB raw video FourCCs mostly rely on ffmpeg's mappings for NUT raw video, but this is still considered better than adding a raw video decoder - even if trivial, it would be full of annoying lookup tables.) The TV code has not been tested. Some corrective changes regarding endian and other image format flags creep in.
130 lines
3.0 KiB
C
130 lines
3.0 KiB
C
/*
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* Only a sample!
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*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <stdio.h>
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#include "video/img_fourcc.h"
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#include "tv.h"
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static tvi_handle_t *tvi_init_dummy(tv_param_t* tv_param);
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/* information about this file */
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const tvi_info_t tvi_info_dummy = {
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tvi_init_dummy,
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"NULL-TV",
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"dummy",
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"alex",
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NULL
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};
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/* private data's */
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typedef struct priv {
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int width;
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int height;
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} priv_t;
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#include "tvi_def.h"
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/* handler creator - entry point ! */
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static tvi_handle_t *tvi_init_dummy(tv_param_t* tv_param)
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{
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return tv_new_handle(sizeof(priv_t), &functions);
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}
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/* initialisation */
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static int init(priv_t *priv)
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{
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priv->width = 320;
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priv->height = 200;
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return 1;
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}
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/* that's the real start, we'got the format parameters (checked with control) */
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static int start(priv_t *priv)
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{
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return 1;
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}
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static int uninit(priv_t *priv)
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{
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return 1;
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}
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static int control(priv_t *priv, int cmd, void *arg)
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{
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switch(cmd)
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{
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case TVI_CONTROL_IS_VIDEO:
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return TVI_CONTROL_TRUE;
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case TVI_CONTROL_VID_GET_FORMAT:
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*(int *)arg = MP_FOURCC_YV12;
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return TVI_CONTROL_TRUE;
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case TVI_CONTROL_VID_SET_FORMAT:
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{
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// int req_fmt = *(int *)arg;
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int req_fmt = *(int *)arg;
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if (req_fmt != MP_FOURCC_YV12)
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return TVI_CONTROL_FALSE;
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return TVI_CONTROL_TRUE;
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}
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case TVI_CONTROL_VID_SET_WIDTH:
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priv->width = *(int *)arg;
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return TVI_CONTROL_TRUE;
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case TVI_CONTROL_VID_GET_WIDTH:
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*(int *)arg = priv->width;
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return TVI_CONTROL_TRUE;
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case TVI_CONTROL_VID_SET_HEIGHT:
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priv->height = *(int *)arg;
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return TVI_CONTROL_TRUE;
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case TVI_CONTROL_VID_GET_HEIGHT:
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*(int *)arg = priv->height;
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return TVI_CONTROL_TRUE;
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case TVI_CONTROL_VID_CHK_WIDTH:
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case TVI_CONTROL_VID_CHK_HEIGHT:
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return TVI_CONTROL_TRUE;
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case TVI_CONTROL_TUN_SET_NORM:
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return TVI_CONTROL_TRUE;
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}
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return TVI_CONTROL_UNKNOWN;
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}
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static double grab_video_frame(priv_t *priv, char *buffer, int len)
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{
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memset(buffer, 0x42, len);
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return 1;
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}
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static int get_video_framesize(priv_t *priv)
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{
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/* YV12 */
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return priv->width * priv->height * 12 / 8;
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}
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static double grab_audio_frame(priv_t *priv, char *buffer, int len)
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{
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memset(buffer, 0x42, len);
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return 1;
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}
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static int get_audio_framesize(priv_t *priv)
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{
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return 1;
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}
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