mirror of
https://github.com/mpv-player/mpv
synced 2024-12-25 00:02:13 +00:00
21c200e767
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@26101 b3059339-0415-0410-9bf9-f77b7e298cf2
152 lines
3.5 KiB
C
152 lines
3.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include "config.h"
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#include "mp_msg.h"
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#include "vd_internal.h"
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#include "libavutil/lzo.h"
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#define MOD_NAME "DecLZO"
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static vd_info_t info = {
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"LZO compressed Video",
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"lzo",
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"Tilmann Bitterberg",
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"Transcode development team <http://www.theorie.physik.uni-goettingen.de/~ostreich/transcode/>",
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"based on liblzo: http://www.oberhumer.com/opensource/lzo/"
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};
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LIBVD_EXTERN(lzo)
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typedef struct {
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uint8_t *buffer;
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int bufsz;
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int codec;
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} lzo_context_t;
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// to set/get/query special features/parameters
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static int control (sh_video_t *sh, int cmd, void* arg, ...)
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{
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lzo_context_t *priv = sh->context;
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switch(cmd){
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case VDCTRL_QUERY_FORMAT:
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if (*(int *)arg == priv->codec) return CONTROL_TRUE;
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return CONTROL_FALSE;
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}
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return CONTROL_UNKNOWN;
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}
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// init driver
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static int init(sh_video_t *sh)
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{
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lzo_context_t *priv;
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if (sh->bih->biSizeImage <= 0) {
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mp_msg (MSGT_DECVIDEO, MSGL_ERR, "[%s] Invalid frame size\n", MOD_NAME);
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return 0;
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}
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priv = malloc(sizeof(lzo_context_t));
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if (!priv)
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{
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mp_msg (MSGT_DECVIDEO, MSGL_ERR, "[%s] memory allocation failed\n", MOD_NAME);
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return 0;
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}
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priv->bufsz = sh->bih->biSizeImage;
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priv->buffer = malloc(priv->bufsz + LZO_OUTPUT_PADDING);
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priv->codec = -1;
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sh->context = priv;
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return 1;
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}
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// uninit driver
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static void uninit(sh_video_t *sh)
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{
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lzo_context_t *priv = sh->context;
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if (priv)
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{
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free(priv->buffer);
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free(priv);
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}
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sh->context = NULL;
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}
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// decode a frame
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static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags)
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{
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int r;
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mp_image_t* mpi;
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lzo_context_t *priv = sh->context;
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int w = priv->bufsz;
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if (len <= 0) {
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return NULL; // skipped frame
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}
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r = lzo1x_decode(priv->buffer, &w, data, &len);
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if (r) {
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/* this should NEVER happen */
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mp_msg (MSGT_DECVIDEO, MSGL_ERR,
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"[%s] internal error - decompression failed: %d\n", MOD_NAME, r);
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return NULL;
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}
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if (priv->codec == -1) {
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// detect RGB24 vs. YV12 via decoded size
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mp_msg (MSGT_DECVIDEO, MSGL_V, "[%s] 2 depth %d, format %d data %p len (%d) (%d)\n",
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MOD_NAME, sh->bih->biBitCount, sh->format, data, len, sh->bih->biSizeImage
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);
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if (w == 0) {
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priv->codec = IMGFMT_BGR24;
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mp_msg (MSGT_DECVIDEO, MSGL_V, "[%s] codec choosen is BGR24\n", MOD_NAME);
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} else if (w == (sh->bih->biSizeImage)/2) {
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priv->codec = IMGFMT_YV12;
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mp_msg (MSGT_DECVIDEO, MSGL_V, "[%s] codec choosen is YV12\n", MOD_NAME);
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} else {
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priv->codec = -1;
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mp_msg(MSGT_DECVIDEO,MSGL_ERR,"[%s] Unsupported out_fmt\n", MOD_NAME);
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return NULL;
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}
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if(!mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,priv->codec)) {
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priv->codec = -1;
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return NULL;
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}
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}
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mpi = mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, 0,
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sh->disp_w, sh->disp_h);
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if (!mpi) {
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mp_msg (MSGT_DECVIDEO, MSGL_ERR, "[%s] mpcodecs_get_image failed\n", MOD_NAME);
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return NULL;
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}
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mpi->planes[0] = priv->buffer;
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if (priv->codec == IMGFMT_BGR24)
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mpi->stride[0] = 3 * sh->disp_w;
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else {
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mpi->stride[0] = sh->disp_w;
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mpi->planes[2] = priv->buffer + sh->disp_w*sh->disp_h;
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mpi->stride[2] = sh->disp_w / 2;
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mpi->planes[1] = priv->buffer + sh->disp_w*sh->disp_h*5/4;
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mpi->stride[1] = sh->disp_w / 2;
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}
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mp_msg (MSGT_DECVIDEO, MSGL_DBG2,
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"[%s] decompressed %lu bytes into %lu bytes\n", MOD_NAME,
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(long) len, (long)w);
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return mpi;
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}
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/* vim: sw=4
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*/
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