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libmodplug: add an option to enlarge the max supported file size.

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This commit is contained in:
Clément Bœsch 2011-10-05 22:47:46 +02:00
parent a763b46298
commit e6f937237a
1 changed files with 22 additions and 2 deletions
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24
libavformat/libmodplug.c
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@ -29,7 +29,7 @@
typedef struct ModPlugContext {
const AVClass *class;
ModPlugFile *f;
uint8_t buf[5 * 1<<20]; ///< input file content, 5M max
uint8_t *buf; ///< input file content
/* options */
int noise_reduction;
@ -39,8 +39,13 @@ typedef struct ModPlugContext {
int bass_range;
int surround_depth;
int surround_delay;
int max_size; ///< max file size to allocate
} ModPlugContext;
#define FF_MODPLUG_MAX_FILE_SIZE (100 * 1<<20) // 100M
#define FF_MODPLUG_DEF_FILE_SIZE ( 5 * 1<<20) // 5M
#define OFFSET(x) offsetof(ModPlugContext, x)
#define D AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
@ -51,6 +56,8 @@ static const AVOption options[] = {
{"bass_range", "XBass cutoff in Hz 10-100", OFFSET(bass_range), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 100, D},
{"surround_depth", "Surround level 0(quiet)-100(heavy)", OFFSET(surround_depth), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 100, D},
{"surround_delay", "Surround delay in ms, usually 5-40ms", OFFSET(surround_delay), FF_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, D},
{"max_size", "Max file size supported (in bytes). Default is 5MB. Set to 0 for no limit (not recommended)",
OFFSET(max_size), FF_OPT_TYPE_INT, {.dbl = FF_MODPLUG_DEF_FILE_SIZE}, 0, FF_MODPLUG_MAX_FILE_SIZE, D},
{NULL},
};
@ -67,8 +74,21 @@ static int modplug_read_header(AVFormatContext *s, AVFormatParameters *ap)
AVIOContext *pb = s->pb;
ModPlug_Settings settings;
ModPlugContext *modplug = s->priv_data;
int sz = avio_size(pb);
int sz = avio_read(pb, modplug->buf, sizeof(modplug->buf));
if (sz < 0) {
av_log(s, AV_LOG_WARNING, "Could not determine file size\n");
sz = modplug->max_size;
} else if (modplug->max_size && sz > modplug->max_size) {
sz = modplug->max_size;
av_log(s, AV_LOG_WARNING, "Max file size reach%s, allocating %dB "
"but demuxing is likely to fail due to incomplete buffer\n",
sz == FF_MODPLUG_DEF_FILE_SIZE ? " (see -max_size)" : "", sz);
}
modplug->buf = av_malloc(modplug->max_size);
if (!modplug->buf)
return AVERROR(ENOMEM);
sz = avio_read(pb, modplug->buf, sz);
ModPlug_GetSettings(&settings);
settings.mChannels = 2;