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merge
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dongmao zhang
parent
7733d455c8
commit
b5809a68bf
254
a.c
Normal file
254
a.c
Normal file
@ -0,0 +1,254 @@
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <stdint.h>
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#define FLVF_HEADER 1
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#define FLVF_SCRIPT 2
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struct flvhdr
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{
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char fh_magic[3];
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char fh_version;
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char fh_flags;
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char fh_hlen[4];
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char fh_pads[4];
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}__attribute__((packed));
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struct taghdr
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{
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uint8_t th_type;
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uint8_t th_dlen[3];
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uint8_t th_tstamp[3];
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uint8_t th_xstamp;
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uint8_t th_streamid[3];
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}__attribute__((packed));
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struct flvcombine
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{
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FILE * fc_file;
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uint32_t fc_flags;
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uint32_t fc_timestamp;
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uint32_t fc_filesize;
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double fc_duration;
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int fc_filesize_offset;
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int fc_duration_offset;
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};
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/* duration, filesize */
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uint32_t buftoint(const void *buf, size_t len)
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{
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uint32_t bufint = 0;
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const uint8_t *pval = (const uint8_t *)buf;
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while (len-- > 0)
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bufint = (bufint << 8) + *pval++;
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return bufint;
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}
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int dd_copy(FILE * dst_fp, FILE * src_fp, size_t dlen)
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{
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size_t len;
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char buf[64 * 1024];
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while (dlen > 0 && !feof(src_fp)) {
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len = fread(buf, 1, dlen < sizeof(buf)? dlen: sizeof(buf), src_fp);
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if (fwrite(buf, 1, len, dst_fp) != len)
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break;
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dlen -= len;
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}
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return dlen;
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}
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void adjtimestamp(struct taghdr *header, uint32_t stampbase)
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{
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uint32_t netval = 0;
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uint32_t adjtime = stampbase;
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adjtime += buftoint(&header->th_tstamp, sizeof(header->th_tstamp));
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adjtime += (header->th_xstamp << 24);
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header->th_xstamp = (adjtime >> 24);
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header->th_tstamp[0] = (adjtime >> 16);
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header->th_tstamp[1] = (adjtime >> 8);
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header->th_tstamp[2] = (adjtime >> 0);
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}
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void update_metainfo(struct flvcombine *combine, FILE *fp, size_t dlen)
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{
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int i;
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size_t len;
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char *pmem = NULL;
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char buf[256 * 1024];
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double duration = 0.0;
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uint8_t duration_bytes[8];
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printf("dlen: %d\n", dlen);
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assert (dlen < (256 * 1024));
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len = fread(buf, 1, dlen < sizeof(buf)? dlen: sizeof(buf), fp);
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if (len == 0)
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return;
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pmem = (char *)memmem(buf, len, "duration", 8);
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if (pmem == NULL || pmem + 17l - buf > len)
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return;
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memcpy(&duration_bytes, pmem + 9, 8);
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for (i = 0; i < 4; i ++) {
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uint8_t tmp = duration_bytes[i];
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duration_bytes[i] = duration_bytes[7 - i];
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duration_bytes[7 - i] = tmp;
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}
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memcpy(&duration, &duration_bytes, 8);
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combine->fc_duration += duration;
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if (combine->fc_flags & FLVF_SCRIPT)
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return;
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combine->fc_duration_offset =
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combine->fc_filesize + (pmem + 9l - buf) + sizeof(struct taghdr);
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pmem = (char *)memmem(buf, len, "filesize", 8);
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if (pmem == NULL || pmem + 17l - buf > len)
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return;
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combine->fc_filesize_offset =
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combine->fc_filesize + (pmem + 9l - buf) + sizeof(struct taghdr);
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}
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int addflv(struct flvcombine *combine, const char *path)
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{
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int error = 0;
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FILE *fp, *fout;
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char magic[4];
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long savepos;
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size_t len, dlen, flags;
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struct flvhdr header;
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struct taghdr *last;
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struct taghdr tagvideo;
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struct taghdr tagaudio;
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struct taghdr tagheader;
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fp = fopen(path, "rb");
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fout = combine->fc_file;
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if (fp == NULL || fout == NULL)
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return 0;
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last = NULL;
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memset(magic, 0, sizeof(magic));
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memset(&tagvideo, 0, sizeof(tagvideo));
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memset(&tagaudio, 0, sizeof(tagaudio));
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if ( !fread(&header, sizeof(header), 1, fp) )
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goto fail;
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memcpy(magic, header.fh_magic, 3);
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if ( strcmp("FLV", magic) )
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goto fail;
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if ((combine->fc_flags & FLVF_HEADER) == 0) {
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fwrite(&header, sizeof(header), 1, fout);
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combine->fc_filesize += sizeof(header);
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combine->fc_flags |= FLVF_HEADER;
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}
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printf("magic: %s\n", magic);
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printf("flags: 0x%02x\n", header.fh_flags);
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printf("version: 0x%02x\n", header.fh_version);
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printf("header len: %d\n", buftoint(header.fh_hlen, sizeof(header.fh_hlen)));
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while (feof(fp) == 0) {
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if ( !fread(&tagheader, sizeof(tagheader), 1, fp) )
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goto fail;
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dlen = buftoint(tagheader.th_dlen, sizeof(tagheader.th_dlen));
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switch (tagheader.th_type)
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{
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case 0x09:
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adjtimestamp(&tagheader, combine->fc_timestamp);
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tagvideo = tagheader;
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last = &tagvideo;
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break;
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case 0x08:
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adjtimestamp(&tagheader, combine->fc_timestamp);
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tagaudio = tagheader;
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last = &tagaudio;
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break;
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default:
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flags = combine->fc_flags;
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savepos = ftell(fp);
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if (savepos == -1)
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goto fail;
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savepos = (flags & FLVF_SCRIPT)? (savepos + dlen + 4): savepos;
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update_metainfo(combine, fp, dlen);
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combine->fc_flags |= FLVF_SCRIPT;
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if ( fseek(fp, savepos, SEEK_SET) )
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goto fail;
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if (flags & FLVF_SCRIPT)
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continue;
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break;
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}
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fwrite(&tagheader, sizeof(tagheader), 1, fout);
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combine->fc_filesize += sizeof(tagheader);
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combine->fc_filesize += (dlen + 4);
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if ( dd_copy(fout, fp, dlen + 4)) {
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error = -__LINE__;
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break;
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}
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}
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fail:
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fclose(fp);
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if (last == &tagvideo || last == &tagaudio) {
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combine->fc_timestamp = buftoint(last->th_tstamp, sizeof(last->th_tstamp));
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combine->fc_timestamp |= (last->th_xstamp << 24);
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printf("time stamp: %d\n", combine->fc_timestamp);
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}
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return 0;
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}
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void fixedflv(struct flvcombine *context)
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{
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int i;
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double dblval = 0.0;
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uint8_t dblbytes[8];
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FILE *fout = context->fc_file;
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if (context->fc_filesize_offset > 0) {
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if ( fseek(fout, context->fc_filesize_offset, SEEK_SET) )
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return;
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dblval = context->fc_filesize;
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memcpy(dblbytes, &dblval, 8);
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for (i = 0; i < 4; i ++) {
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uint8_t tmp = dblbytes[i];
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dblbytes[i] = dblbytes[7 - i];
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dblbytes[7 - i] = tmp;
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}
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fwrite(dblbytes, 8, 1, fout);
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}
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if (context->fc_duration_offset > 0) {
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if ( fseek(fout, context->fc_duration_offset, SEEK_SET) )
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return;
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dblval = context->fc_duration;
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memcpy(dblbytes, &dblval, 8);
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for (i = 0; i < 4; i ++) {
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uint8_t tmp = dblbytes[i];
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dblbytes[i] = dblbytes[7 - i];
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dblbytes[7 - i] = tmp;
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}
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fwrite(dblbytes, 8, 1, fout);
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}
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}
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int main(int argc, char *argv[])
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{
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int i;
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struct flvcombine context;
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memset(&context, 0, sizeof(context));
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context.fc_file = fopen("out.flv", "wb");
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if (context.fc_file == NULL)
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return -1;
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context.fc_duration = 0;
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for (i = 1; i < argc; i++)
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addflv(&context, argv[i]);
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fixedflv(&context);
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fclose(context.fc_file);
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printf("seconds: %d\n", context.fc_timestamp);
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return 0;
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}
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BIN
youtube-dl
BIN
youtube-dl
Binary file not shown.
@ -3078,10 +3078,10 @@ def _real_extract(self, url):
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download_url = 'http://f.youku.com/player/getFlvPath/sid/%s_%02X/st/flv/fileid/%s?k=%s' % (sid, index, temp_fileid, key)
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print download_url
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info = {
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'id': '%s_part%d' % (video_id, index),
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'id': '%s_part%02d' % (video_id, index),
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'url': download_url,
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'uploader': None,
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'title': video_title
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'title': video_title,
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'ext': ext,
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'format': u'NA'
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}
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