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FFmpeg/libavformat/libmodplug.c
Andreas Rheinhardt c1e439d7e9 avformat: Forward errors where possible 
It is not uncommon to find code where the caller thinks to know better
what the return value should be than the callee. E.g. something like
"if (av_new_packet(pkt, size) < 0) return AVERROR(ENOMEM);". This commit
changes several instances of this to instead forward the actual error.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2019-12-12 19:25:33 +01:00

385 lines
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C
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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* ModPlug demuxer
* @todo better probing than extensions matching
*/
#define MODPLUG_STATIC
#include <libmodplug/modplug.h>
#include "libavutil/avstring.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "avformat.h"
#include "internal.h"
typedef struct ModPlugContext {
const AVClass *class;
ModPlugFile *f;
uint8_t *buf; ///< input file content
/* options */
int noise_reduction;
int reverb_depth;
int reverb_delay;
int bass_amount;
int bass_range;
int surround_depth;
int surround_delay;
int max_size; ///< max file size to allocate
/* optional video stream */
double ts_per_packet; ///< used to define the pts/dts using packet_count;
int packet_count; ///< total number of audio packets
int print_textinfo; ///< bool flag for printing speed, tempo, order, ...
int video_stream; ///< 1 if the user want a video stream, otherwise 0
int w; ///< video stream width in char (one char = 8x8px)
int h; ///< video stream height in char (one char = 8x8px)
int video_switch; ///< 1 if current packet is video, otherwise 0
int fsize; ///< constant frame size
int linesize; ///< line size in bytes
char *color_eval; ///< color eval user input expression
AVExpr *expr; ///< parsed color eval expression
} ModPlugContext;
static const char * const var_names[] = {
"x", "y",
"w", "h",
"t",
"speed", "tempo", "order", "pattern", "row",
NULL
};
enum var_name {
VAR_X, VAR_Y,
VAR_W, VAR_H,
VAR_TIME,
VAR_SPEED, VAR_TEMPO, VAR_ORDER, VAR_PATTERN, VAR_ROW,
VAR_VARS_NB
};
#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[] = {
{"noise_reduction", "Enable noise reduction 0(off)-1(on)", OFFSET(noise_reduction), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D},
{"reverb_depth", "Reverb level 0(quiet)-100(loud)", OFFSET(reverb_depth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},
{"reverb_delay", "Reverb delay in ms, usually 40-200ms", OFFSET(reverb_delay), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D},
{"bass_amount", "XBass level 0(quiet)-100(loud)", OFFSET(bass_amount), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},
{"bass_range", "XBass cutoff in Hz 10-100", OFFSET(bass_range), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},
{"surround_depth", "Surround level 0(quiet)-100(heavy)", OFFSET(surround_depth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},
{"surround_delay", "Surround delay in ms, usually 5-40ms", OFFSET(surround_delay), AV_OPT_TYPE_INT, {.i64 = 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), AV_OPT_TYPE_INT, {.i64 = FF_MODPLUG_DEF_FILE_SIZE}, 0, FF_MODPLUG_MAX_FILE_SIZE, D},
{"video_stream_expr", "Color formula", OFFSET(color_eval), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, D},
{"video_stream", "Make demuxer output a video stream", OFFSET(video_stream), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D},
{"video_stream_w", "Video stream width in char (one char = 8x8px)", OFFSET(w), AV_OPT_TYPE_INT, {.i64 = 30}, 20, 512, D},
{"video_stream_h", "Video stream height in char (one char = 8x8px)", OFFSET(h), AV_OPT_TYPE_INT, {.i64 = 30}, 20, 512, D},
{"video_stream_ptxt", "Print speed, tempo, order, ... in video stream", OFFSET(print_textinfo), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, D},
{NULL},
};
#define SET_OPT_IF_REQUESTED(libopt, opt, flag) do { \
if (modplug->opt) { \
settings.libopt = modplug->opt; \
settings.mFlags |= flag; \
} \
} while (0)
#define ADD_META_MULTIPLE_ENTRIES(entry_name, fname) do { \
if (n_## entry_name ##s) { \
unsigned i, n = 0; \
\
for (i = 0; i < n_## entry_name ##s; i++) { \
char item_name[64] = {0}; \
fname(f, i, item_name); \
if (!*item_name) \
continue; \
if (n) \
av_dict_set(&s->metadata, #entry_name, "\n", AV_DICT_APPEND); \
av_dict_set(&s->metadata, #entry_name, item_name, AV_DICT_APPEND); \
n++; \
} \
\
extra = av_asprintf(", %u/%u " #entry_name "%s", \
n, n_## entry_name ##s, n > 1 ? "s" : ""); \
if (!extra) \
return AVERROR(ENOMEM); \
av_dict_set(&s->metadata, "extra info", extra, AV_DICT_APPEND); \
av_free(extra); \
} \
} while (0)
static int modplug_load_metadata(AVFormatContext *s)
{
ModPlugContext *modplug = s->priv_data;
ModPlugFile *f = modplug->f;
char *extra;
const char *name = ModPlug_GetName(f);
const char *msg = ModPlug_GetMessage(f);
unsigned n_instruments = ModPlug_NumInstruments(f);
unsigned n_samples = ModPlug_NumSamples(f);
unsigned n_patterns = ModPlug_NumPatterns(f);
unsigned n_channels = ModPlug_NumChannels(f);
if (name && *name) av_dict_set(&s->metadata, "name", name, 0);
if (msg && *msg) av_dict_set(&s->metadata, "message", msg, 0);
extra = av_asprintf("%u pattern%s, %u channel%s",
n_patterns, n_patterns > 1 ? "s" : "",
n_channels, n_channels > 1 ? "s" : "");
if (!extra)
return AVERROR(ENOMEM);
av_dict_set(&s->metadata, "extra info", extra, AV_DICT_DONT_STRDUP_VAL);
ADD_META_MULTIPLE_ENTRIES(instrument, ModPlug_InstrumentName);
ADD_META_MULTIPLE_ENTRIES(sample, ModPlug_SampleName);
return 0;
}
#define AUDIO_PKT_SIZE 512
static int modplug_read_header(AVFormatContext *s)
{
AVStream *st;
AVIOContext *pb = s->pb;
ModPlug_Settings settings;
ModPlugContext *modplug = s->priv_data;
int64_t sz = avio_size(pb);
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 %"PRIi64"B "
"but demuxing is likely to fail due to incomplete buffer\n",
sz == FF_MODPLUG_DEF_FILE_SIZE ? " (see -max_size)" : "", sz);
}
if (modplug->color_eval) {
int r = av_expr_parse(&modplug->expr, modplug->color_eval, var_names,
NULL, NULL, NULL, NULL, 0, s);
if (r < 0)
return r;
}
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;
settings.mBits = 16;
settings.mFrequency = 44100;
settings.mResamplingMode = MODPLUG_RESAMPLE_FIR; // best quality
settings.mLoopCount = 0; // prevents looping forever
if (modplug->noise_reduction) settings.mFlags |= MODPLUG_ENABLE_NOISE_REDUCTION;
SET_OPT_IF_REQUESTED(mReverbDepth, reverb_depth, MODPLUG_ENABLE_REVERB);
SET_OPT_IF_REQUESTED(mReverbDelay, reverb_delay, MODPLUG_ENABLE_REVERB);
SET_OPT_IF_REQUESTED(mBassAmount, bass_amount, MODPLUG_ENABLE_MEGABASS);
SET_OPT_IF_REQUESTED(mBassRange, bass_range, MODPLUG_ENABLE_MEGABASS);
SET_OPT_IF_REQUESTED(mSurroundDepth, surround_depth, MODPLUG_ENABLE_SURROUND);
SET_OPT_IF_REQUESTED(mSurroundDelay, surround_delay, MODPLUG_ENABLE_SURROUND);
if (modplug->reverb_depth) settings.mReverbDepth = modplug->reverb_depth;
if (modplug->reverb_delay) settings.mReverbDelay = modplug->reverb_delay;
if (modplug->bass_amount) settings.mBassAmount = modplug->bass_amount;
if (modplug->bass_range) settings.mBassRange = modplug->bass_range;
if (modplug->surround_depth) settings.mSurroundDepth = modplug->surround_depth;
if (modplug->surround_delay) settings.mSurroundDelay = modplug->surround_delay;
ModPlug_SetSettings(&settings);
modplug->f = ModPlug_Load(modplug->buf, sz);
if (!modplug->f) {
av_freep(&modplug->buf);
return AVERROR_INVALIDDATA;
}
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avpriv_set_pts_info(st, 64, 1, 1000);
st->duration = ModPlug_GetLength(modplug->f);
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
st->codecpar->channels = settings.mChannels;
st->codecpar->sample_rate = settings.mFrequency;
// timebase = 1/1000, 2ch 16bits 44.1kHz-> 2*2*44100
modplug->ts_per_packet = 1000*AUDIO_PKT_SIZE / (4*44100.);
if (modplug->video_stream) {
AVStream *vst = avformat_new_stream(s, NULL);
if (!vst)
return AVERROR(ENOMEM);
avpriv_set_pts_info(vst, 64, 1, 1000);
vst->duration = st->duration;
vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
vst->codecpar->codec_id = AV_CODEC_ID_XBIN;
vst->codecpar->width = modplug->w << 3;
vst->codecpar->height = modplug->h << 3;
modplug->linesize = modplug->w * 3;
modplug->fsize = modplug->linesize * modplug->h;
}
return modplug_load_metadata(s);
}
static void write_text(uint8_t *dst, const char *s, int linesize, int x, int y)
{
int i;
dst += y*linesize + x*3;
for (i = 0; s[i]; i++, dst += 3) {
dst[0] = 0x0; // count - 1
dst[1] = s[i]; // char
dst[2] = 0x0f; // background / foreground
}
}
#define PRINT_INFO(line, name, idvalue) do { \
snprintf(intbuf, sizeof(intbuf), "%.0f", var_values[idvalue]); \
write_text(pkt->data, name ":", modplug->linesize, 0+1, line+1); \
write_text(pkt->data, intbuf, modplug->linesize, 10+1, line+1); \
} while (0)
static int modplug_read_packet(AVFormatContext *s, AVPacket *pkt)
{
ModPlugContext *modplug = s->priv_data;
int ret;
if (modplug->video_stream) {
modplug->video_switch ^= 1; // one video packet for one audio packet
if (modplug->video_switch) {
double var_values[VAR_VARS_NB];
var_values[VAR_W ] = modplug->w;
var_values[VAR_H ] = modplug->h;
var_values[VAR_TIME ] = modplug->packet_count * modplug->ts_per_packet;
var_values[VAR_SPEED ] = ModPlug_GetCurrentSpeed (modplug->f);
var_values[VAR_TEMPO ] = ModPlug_GetCurrentTempo (modplug->f);
var_values[VAR_ORDER ] = ModPlug_GetCurrentOrder (modplug->f);
var_values[VAR_PATTERN] = ModPlug_GetCurrentPattern(modplug->f);
var_values[VAR_ROW ] = ModPlug_GetCurrentRow (modplug->f);
if ((ret = av_new_packet(pkt, modplug->fsize)) < 0)
return ret;
pkt->stream_index = 1;
memset(pkt->data, 0, modplug->fsize);
if (modplug->print_textinfo) {
char intbuf[32];
PRINT_INFO(0, "speed", VAR_SPEED);
PRINT_INFO(1, "tempo", VAR_TEMPO);
PRINT_INFO(2, "order", VAR_ORDER);
PRINT_INFO(3, "pattern", VAR_PATTERN);
PRINT_INFO(4, "row", VAR_ROW);
PRINT_INFO(5, "ts", VAR_TIME);
}
if (modplug->expr) {
int x, y;
for (y = 0; y < modplug->h; y++) {
for (x = 0; x < modplug->w; x++) {
double color;
var_values[VAR_X] = x;
var_values[VAR_Y] = y;
color = av_expr_eval(modplug->expr, var_values, NULL);
pkt->data[y*modplug->linesize + x*3 + 2] |= av_clip((int)color, 0, 0xf)<<4;
}
}
}
pkt->pts = pkt->dts = var_values[VAR_TIME];
pkt->flags |= AV_PKT_FLAG_KEY;
return 0;
}
}
if ((ret = av_new_packet(pkt, AUDIO_PKT_SIZE)) < 0)
return ret;
if (modplug->video_stream)
pkt->pts = pkt->dts = modplug->packet_count++ * modplug->ts_per_packet;
pkt->size = ModPlug_Read(modplug->f, pkt->data, AUDIO_PKT_SIZE);
if (pkt->size <= 0) {
av_packet_unref(pkt);
return pkt->size == 0 ? AVERROR_EOF : AVERROR(EIO);
}
return 0;
}
static int modplug_read_close(AVFormatContext *s)
{
ModPlugContext *modplug = s->priv_data;
ModPlug_Unload(modplug->f);
av_freep(&modplug->buf);
return 0;
}
static int modplug_read_seek(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
{
ModPlugContext *modplug = s->priv_data;
ModPlug_Seek(modplug->f, (int)ts);
if (modplug->video_stream)
modplug->packet_count = ts / modplug->ts_per_packet;
return 0;
}
static const char modplug_extensions[] = "669,abc,amf,ams,dbm,dmf,dsm,far,it,mdl,med,mid,mod,mt2,mtm,okt,psm,ptm,s3m,stm,ult,umx,xm,itgz,itr,itz,mdgz,mdr,mdz,s3gz,s3r,s3z,xmgz,xmr,xmz";
static int modplug_probe(const AVProbeData *p)
{
if (av_match_ext(p->filename, modplug_extensions)) {
if (p->buf_size < 16384)
return AVPROBE_SCORE_EXTENSION/2-1;
else
return AVPROBE_SCORE_EXTENSION;
}
return 0;
}
static const AVClass modplug_class = {
.class_name = "ModPlug demuxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVInputFormat ff_libmodplug_demuxer = {
.name = "libmodplug",
.long_name = NULL_IF_CONFIG_SMALL("ModPlug demuxer"),
.priv_data_size = sizeof(ModPlugContext),
.read_probe = modplug_probe,
.read_header = modplug_read_header,
.read_packet = modplug_read_packet,
.read_close = modplug_read_close,
.read_seek = modplug_read_seek,
.extensions = modplug_extensions,
.priv_class = &modplug_class,
};
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