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libmodplug: add bintext video stream capability.

tags/n0.9
Clément Bœsch Michael Niedermayer 14 years ago
parent
ade3ec8457
commit
86a771143f
1 changed files with 140 additions and 3 deletions
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  1. +140
    -3
      libavformat/libmodplug.c

+ 140
- 3
libavformat/libmodplug.c View File

@@ -24,6 +24,7 @@

#include <libmodplug/modplug.h>
#include "libavutil/avstring.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "avformat.h"

@@ -42,8 +43,39 @@ typedef struct ModPlugContext {
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
int eval_err; ///< 1 if eval failed once, otherwise 0 (used to disable video)
} ModPlugContext;

static const char *var_names[] = {
"E", "PHI", "PI",
"x", "y",
"w", "h",
"t",
"speed", "tempo", "order", "pattern", "row",
NULL
};

enum var_name {
VAR_E, VAR_PHI, VAR_PI,
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

@@ -59,6 +91,11 @@ static const AVOption options[] = {
{"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},
{"video_stream_expr", "Color formula", OFFSET(color_eval), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, D},
{"video_stream", "Make demuxer output a video stream", OFFSET(video_stream), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 1, D},
{"video_stream_w", "Video stream width in char (one char = 8x8px)", OFFSET(w), FF_OPT_TYPE_INT, {.dbl = 30}, 20, 512, D},
{"video_stream_h", "Video stream height in char (one char = 8x8px)", OFFSET(h), FF_OPT_TYPE_INT, {.dbl = 30}, 20, 512, D},
{"video_stream_ptxt", "Print speed, tempo, order, ... in video stream", OFFSET(print_textinfo), FF_OPT_TYPE_INT, {.dbl = 1}, 0, 1, D},
{NULL},
};

@@ -122,6 +159,8 @@ static int modplug_load_metadata(AVFormatContext *s)
return 0;
}

#define AUDIO_PKT_SIZE 512

static int modplug_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
AVStream *st;
@@ -182,17 +221,113 @@ static int modplug_read_header(AVFormatContext *s, AVFormatParameters *ap)
st->codec->channels = settings.mChannels;
st->codec->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 = av_new_stream(s, 1);
if (!vst)
return AVERROR(ENOMEM);
av_set_pts_info(vst, 64, 1, 1000);
vst->duration = st->duration;
vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
vst->codec->codec_id = CODEC_ID_XBIN;
vst->codec->width = modplug->w << 3;
vst->codec->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;

if (av_new_packet(pkt, 512) < 0)
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_E ] = M_E;
var_values[VAR_PHI ] = M_PHI;
var_values[VAR_PI ] = M_PI;
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 (av_new_packet(pkt, modplug->fsize) < 0)
return AVERROR(ENOMEM);
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->color_eval && !modplug->eval_err) {
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;
if (av_expr_parse_and_eval(&color, modplug->color_eval,
var_names, var_values,
NULL, NULL, NULL, NULL, NULL, 0, s) < 0) {
av_log(s, AV_LOG_ERROR,
"Error while evaluating the expression '%s' with x=%d y=%d\n",
modplug->color_eval, x, y);
modplug->eval_err = 1;
return 0;
}
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 (av_new_packet(pkt, AUDIO_PKT_SIZE) < 0)
return AVERROR(ENOMEM);

pkt->size = ModPlug_Read(modplug->f, pkt->data, 512);
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_free_packet(pkt);
return pkt->size == 0 ? AVERROR_EOF : AVERROR(EIO);
@@ -210,8 +345,10 @@ static int modplug_read_close(AVFormatContext *s)

static int modplug_read_seek(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
{
const ModPlugContext *modplug = s->priv_data;
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;
}



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