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mirror of https://github.com/mpv-player/mpv synced 2024-08-04 14:59:58 +02:00

commands: clean up get_metadata() and related code

Code in get_metadata() allocated too small a buffer for the text it
wrote (noticed by Clément Bœsch). Make the code cleaner and more
robust by changing it to use talloc_asprintf(). Also make it always
return non-NULL and remove checks on caller side.
This commit is contained in:
Uoti Urpala 2010-12-20 06:34:11 +02:00
parent 2bc2399797
commit 835d3deea2
2 changed files with 81 additions and 140 deletions

110
command.c
View File

@ -3278,126 +3278,100 @@ void run_command(MPContext *mpctx, mp_cmd_t *cmd)
break;
case MP_CMD_GET_FILENAME:{
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_FILENAME='%s'\n",
get_metadata(mpctx, META_NAME));
char *inf = get_metadata(mpctx, META_NAME);
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_FILENAME='%s'\n", inf);
talloc_free(inf);
}
break;
case MP_CMD_GET_VIDEO_CODEC:{
char *inf = get_metadata(mpctx, META_VIDEO_CODEC);
if (!inf)
inf = strdup("");
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_VIDEO_CODEC='%s'\n", inf);
free(inf);
char *inf = get_metadata(mpctx, META_VIDEO_CODEC);
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_VIDEO_CODEC='%s'\n", inf);
talloc_free(inf);
}
break;
case MP_CMD_GET_VIDEO_BITRATE:{
char *inf = get_metadata(mpctx, META_VIDEO_BITRATE);
if (!inf)
inf = strdup("");
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_VIDEO_BITRATE='%s'\n", inf);
free(inf);
char *inf = get_metadata(mpctx, META_VIDEO_BITRATE);
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_VIDEO_BITRATE='%s'\n", inf);
talloc_free(inf);
}
break;
case MP_CMD_GET_VIDEO_RESOLUTION:{
char *inf = get_metadata(mpctx, META_VIDEO_RESOLUTION);
if (!inf)
inf = strdup("");
mp_msg(MSGT_GLOBAL, MSGL_INFO,
"ANS_VIDEO_RESOLUTION='%s'\n", inf);
free(inf);
char *inf = get_metadata(mpctx, META_VIDEO_RESOLUTION);
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_VIDEO_RESOLUTION='%s'\n", inf);
talloc_free(inf);
}
break;
case MP_CMD_GET_AUDIO_CODEC:{
char *inf = get_metadata(mpctx, META_AUDIO_CODEC);
if (!inf)
inf = strdup("");
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_AUDIO_CODEC='%s'\n", inf);
free(inf);
char *inf = get_metadata(mpctx, META_AUDIO_CODEC);
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_AUDIO_CODEC='%s'\n", inf);
talloc_free(inf);
}
break;
case MP_CMD_GET_AUDIO_BITRATE:{
char *inf = get_metadata(mpctx, META_AUDIO_BITRATE);
if (!inf)
inf = strdup("");
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_AUDIO_BITRATE='%s'\n", inf);
free(inf);
char *inf = get_metadata(mpctx, META_AUDIO_BITRATE);
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_AUDIO_BITRATE='%s'\n", inf);
talloc_free(inf);
}
break;
case MP_CMD_GET_AUDIO_SAMPLES:{
char *inf = get_metadata(mpctx, META_AUDIO_SAMPLES);
if (!inf)
inf = strdup("");
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_AUDIO_SAMPLES='%s'\n", inf);
free(inf);
char *inf = get_metadata(mpctx, META_AUDIO_SAMPLES);
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_AUDIO_SAMPLES='%s'\n", inf);
talloc_free(inf);
}
break;
case MP_CMD_GET_META_TITLE:{
char *inf = get_metadata(mpctx, META_INFO_TITLE);
if (!inf)
inf = strdup("");
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_META_TITLE='%s'\n", inf);
free(inf);
char *inf = get_metadata(mpctx, META_INFO_TITLE);
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_META_TITLE='%s'\n", inf);
talloc_free(inf);
}
break;
case MP_CMD_GET_META_ARTIST:{
char *inf = get_metadata(mpctx, META_INFO_ARTIST);
if (!inf)
inf = strdup("");
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_META_ARTIST='%s'\n", inf);
free(inf);
char *inf = get_metadata(mpctx, META_INFO_ARTIST);
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_META_ARTIST='%s'\n", inf);
talloc_free(inf);
}
break;
case MP_CMD_GET_META_ALBUM:{
char *inf = get_metadata(mpctx, META_INFO_ALBUM);
if (!inf)
inf = strdup("");
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_META_ALBUM='%s'\n", inf);
free(inf);
char *inf = get_metadata(mpctx, META_INFO_ALBUM);
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_META_ALBUM='%s'\n", inf);
talloc_free(inf);
}
break;
case MP_CMD_GET_META_YEAR:{
char *inf = get_metadata(mpctx, META_INFO_YEAR);
if (!inf)
inf = strdup("");
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_META_YEAR='%s'\n", inf);
free(inf);
char *inf = get_metadata(mpctx, META_INFO_YEAR);
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_META_YEAR='%s'\n", inf);
talloc_free(inf);
}
break;
case MP_CMD_GET_META_COMMENT:{
char *inf = get_metadata(mpctx, META_INFO_COMMENT);
if (!inf)
inf = strdup("");
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_META_COMMENT='%s'\n", inf);
free(inf);
char *inf = get_metadata(mpctx, META_INFO_COMMENT);
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_META_COMMENT='%s'\n", inf);
talloc_free(inf);
}
break;
case MP_CMD_GET_META_TRACK:{
char *inf = get_metadata(mpctx, META_INFO_TRACK);
if (!inf)
inf = strdup("");
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_META_TRACK='%s'\n", inf);
free(inf);
char *inf = get_metadata(mpctx, META_INFO_TRACK);
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_META_TRACK='%s'\n", inf);
talloc_free(inf);
}
break;
case MP_CMD_GET_META_GENRE:{
char *inf = get_metadata(mpctx, META_INFO_GENRE);
if (!inf)
inf = strdup("");
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_META_GENRE='%s'\n", inf);
free(inf);
char *inf = get_metadata(mpctx, META_INFO_GENRE);
mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_META_GENRE='%s'\n", inf);
talloc_free(inf);
}
break;

111
mplayer.c
View File

@ -453,88 +453,55 @@ static char *get_demuxer_info(struct MPContext *mpctx, char *tag) {
int n;
if (!info || !tag)
return NULL;
return talloc_strdup(NULL, "");
for (n = 0; info[2*n] != NULL ; n++)
if (!strcasecmp (info[2*n], tag))
break;
return info[2*n+1] ? strdup (info[2*n+1]) : NULL;
return talloc_strdup(NULL, info[2*n+1] ? info[2*n+1] : "");
}
char *get_metadata(struct MPContext *mpctx, metadata_t type)
{
char *meta = NULL;
sh_audio_t * const sh_audio = mpctx->sh_audio;
sh_video_t * const sh_video = mpctx->sh_video;
sh_audio_t * const sh_audio = mpctx->sh_audio;
sh_video_t * const sh_video = mpctx->sh_video;
if (!is_valid_metadata_type(mpctx, type))
return NULL;
if (!is_valid_metadata_type(mpctx, type))
return NULL;
switch (type)
{
case META_NAME:
{
return strdup(mp_basename(mpctx->filename));
}
case META_VIDEO_CODEC:
{
if (sh_video->format == 0x10000001)
meta = strdup ("mpeg1");
else if (sh_video->format == 0x10000002)
meta = strdup ("mpeg2");
else if (sh_video->format == 0x10000004)
meta = strdup ("mpeg4");
else if (sh_video->format == 0x10000005)
meta = strdup ("h264");
else if (sh_video->format >= 0x20202020)
{
meta = malloc (8);
sprintf (meta, "%.4s", (char *) &sh_video->format);
}
else
{
meta = malloc (8);
sprintf (meta, "0x%08X", sh_video->format);
}
return meta;
}
case META_VIDEO_BITRATE:
{
meta = malloc (16);
sprintf (meta, "%d kbps", (int) (sh_video->i_bps * 8 / 1024));
return meta;
}
case META_VIDEO_RESOLUTION:
{
meta = malloc (16);
sprintf (meta, "%d x %d", sh_video->disp_w, sh_video->disp_h);
return meta;
}
case META_AUDIO_CODEC:
{
if (sh_audio->codec && sh_audio->codec->name)
meta = strdup (sh_audio->codec->name);
return meta;
}
case META_AUDIO_BITRATE:
{
meta = malloc (16);
sprintf (meta, "%d kbps", (int) (sh_audio->i_bps * 8/1000));
return meta;
}
case META_AUDIO_SAMPLES:
{
meta = malloc (16);
sprintf (meta, "%d Hz, %d ch.", sh_audio->samplerate, sh_audio->channels);
return meta;
}
switch (type) {
case META_NAME:
return talloc_strdup(NULL, mp_basename(mpctx->filename));
case META_VIDEO_CODEC:
if (sh_video->format == 0x10000001)
return talloc_strdup(NULL, "mpeg1");
else if (sh_video->format == 0x10000002)
return talloc_strdup(NULL, "mpeg2");
else if (sh_video->format == 0x10000004)
return talloc_strdup(NULL, "mpeg4");
else if (sh_video->format == 0x10000005)
return talloc_strdup(NULL, "h264");
else if (sh_video->format >= 0x20202020)
return talloc_asprintf(NULL, "%.4s", (char *) &sh_video->format);
else
return talloc_asprintf(NULL, "0x%08X", sh_video->format);
case META_VIDEO_BITRATE:
return talloc_asprintf(NULL, "%d kbps",
(int) (sh_video->i_bps * 8 / 1024));
case META_VIDEO_RESOLUTION:
return talloc_asprintf(NULL, "%d x %d", sh_video->disp_w,
sh_video->disp_h);
case META_AUDIO_CODEC:
if (sh_audio->codec && sh_audio->codec->name)
return talloc_strdup(NULL, sh_audio->codec->name);
return talloc_strdup(NULL, "");
case META_AUDIO_BITRATE:
return talloc_asprintf(NULL, "%d kbps",
(int) (sh_audio->i_bps * 8/1000));
case META_AUDIO_SAMPLES:
return talloc_asprintf(NULL, "%d Hz, %d ch.", sh_audio->samplerate,
sh_audio->channels);
/* check for valid demuxer */
case META_INFO_TITLE:
@ -562,7 +529,7 @@ char *get_metadata(struct MPContext *mpctx, metadata_t type)
break;
}
return meta;
return talloc_strdup(NULL, "");
}
static void print_file_properties(struct MPContext *mpctx, const char *filename)