C++ put_be32函数代码示例

static int aiff_write_trailer(AVFormatContext *s)
{
    ByteIOContext *pb = s->pb;
    AIFFOutputContext *aiff = s->priv_data;
    AVCodecContext *enc = s->streams[0]->codec;

    /* Chunks sizes must be even */
    int64_t file_size, end_size;
    end_size = file_size = url_ftell(pb);
    if (file_size & 1) {
        put_byte(pb, 0);
        end_size++;
    }

    if (!url_is_streamed(s->pb)) {
        /* File length */
        url_fseek(pb, aiff->form, SEEK_SET);
        put_be32(pb, file_size - aiff->form - 4);

        /* Number of sample frames */
        url_fseek(pb, aiff->frames, SEEK_SET);
        put_be32(pb, (file_size-aiff->ssnd-12)/enc->block_align);

        /* Sound Data chunk size */
        url_fseek(pb, aiff->ssnd, SEEK_SET);
        put_be32(pb, file_size - aiff->ssnd - 4);

        /* return to the end */
        url_fseek(pb, end_size, SEEK_SET);

        put_flush_packet(pb);
    }

    return 0;
}

static int rm_write_trailer(AVFormatContext *s)
{
    RMMuxContext *rm = s->priv_data;
    int data_size, index_pos, i;
    ByteIOContext *pb = s->pb;

    if (!url_is_streamed(s->pb)) {
        /* end of file: finish to write header */
        index_pos = url_fseek(pb, 0, SEEK_CUR);
        data_size = index_pos - rm->data_pos;

        /* FIXME: write index */

        /* undocumented end header */
        put_be32(pb, 0);
        put_be32(pb, 0);

        url_fseek(pb, 0, SEEK_SET);
        for(i=0;i<s->nb_streams;i++)
            rm->streams[i].total_frames = rm->streams[i].nb_frames;
        rv10_write_header(s, data_size, 0);
    } else {
        /* undocumented end header */
        put_be32(pb, 0);
        put_be32(pb, 0);
    }
    put_flush_packet(pb);
    return 0;
}

static void write_sgi_header(ByteIOContext *f, const SGIInfo *info)
{
    int i;

    put_be16(f, SGI_MAGIC);
    put_byte(f, info->rle);
    put_byte(f, info->bytes_per_channel);
    put_be16(f, info->dimension);
    put_be16(f, info->xsize);
    put_be16(f, info->ysize);
    put_be16(f, info->zsize);

    /* The rest are constant in this implementation */
    put_be32(f, 0L); /* pixmin */
    put_be32(f, 255L); /* pixmax */
    put_be32(f, 0L); /* dummy */

    /* name */
    for (i = 0; i < 80; i++) {
        put_byte(f, 0);
    }

    put_be32(f, 0L); /* colormap */

    /* The rest of the 512 byte header is unused. */
    for (i = 0; i < 404; i++) {
        put_byte(f, 0);
    }
}

void write_fsmonitor_extension(struct strbuf *sb, struct index_state *istate)
{
	uint32_t hdr_version;
	uint64_t tm;
	uint32_t ewah_start;
	uint32_t ewah_size = 0;
	int fixup = 0;

	put_be32(&hdr_version, INDEX_EXTENSION_VERSION);
	strbuf_add(sb, &hdr_version, sizeof(uint32_t));

	put_be64(&tm, istate->fsmonitor_last_update);
	strbuf_add(sb, &tm, sizeof(uint64_t));
	fixup = sb->len;
	strbuf_add(sb, &ewah_size, sizeof(uint32_t)); /* we'll fix this up later */

	ewah_start = sb->len;
	ewah_serialize_strbuf(istate->fsmonitor_dirty, sb);
	ewah_free(istate->fsmonitor_dirty);
	istate->fsmonitor_dirty = NULL;

	/* fix up size field */
	put_be32(&ewah_size, sb->len - ewah_start);
	memcpy(sb->buf + fixup, &ewah_size, sizeof(uint32_t));

	trace_printf_key(&trace_fsmonitor, "write fsmonitor extension successful");
}

static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
{
    ByteIOContext *pb = &s->pb;
    AVCodecContext *enc = s->streams[pkt->stream_index]->codec;
    FLVContext *flv = s->priv_data;
    int size= pkt->size;
    int flags;

//    av_log(s, AV_LOG_DEBUG, "type:%d pts: %"PRId64" size:%d\n", enc->codec_type, timestamp, size);

    if (enc->codec_type == CODEC_TYPE_VIDEO) {
        put_byte(pb, 9);
        flags = 2; // choose h263
        flags |= pkt->flags & PKT_FLAG_KEY ? 0x10 : 0x20; // add keyframe indicator
    } else {
        assert(enc->codec_type == CODEC_TYPE_AUDIO);
        flags = get_audio_flags(enc);

        assert(size);

        put_byte(pb, 8);
    }

    put_be24(pb,size+1); // include flags
    put_be24(pb,pkt->pts);
    put_be32(pb,flv->reserved);
    put_byte(pb,flags);
    put_buffer(pb, pkt->data, size);
    put_be32(pb,size+1+11); // previous tag size
    flv->duration = pkt->pts + pkt->duration;

    put_flush_packet(pb);
    return 0;
}

static int gxf_write_media_preamble(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt, int size)
{
    GXFStreamContext *sc = &ctx->streams[pkt->stream_index];
    int64_t dts = av_rescale_rnd(pkt->dts, ctx->sample_rate, sc->codec->time_base.den, AV_ROUND_UP);

    put_byte(pb, sc->media_type);
    put_byte(pb, sc->index);
    put_be32(pb, dts);
    if (sc->codec->codec_type == CODEC_TYPE_AUDIO) {
        put_be16(pb, 0);
        put_be16(pb, size / 2);
    } else if (sc->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
        int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
        if (frame_type == FF_I_TYPE) {
            put_byte(pb, 0x0d);
            sc->iframes++;
        } else if (frame_type == FF_B_TYPE) {
            put_byte(pb, 0x0f);
            sc->bframes++;
        } else {
            put_byte(pb, 0x0e);
            sc->pframes++;
        }
        put_be24(pb, size);
    } else if (sc->codec->codec_id == CODEC_ID_DVVIDEO) {
        put_byte(pb, size / 4096);
        put_be24(pb, 0);
    } else
        put_be32(pb, size);
    put_be32(pb, dts);
    put_byte(pb, 1); /* flags */
    put_byte(pb, 0); /* reserved */
    return 16;
}

static void gxf_write_packet_header(ByteIOContext *pb, GXFPktType type)
{
    put_be32(pb, 0); /* packet leader for synchro */
    put_byte(pb, 1);
    put_byte(pb, type); /* map packet */
    put_be32(pb, 0); /* size */
    put_be32(pb, 0); /* reserved */
    put_byte(pb, 0xE1); /* trailer 1 */
    put_byte(pb, 0xE2); /* trailer 2 */
}

static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
{
    ByteIOContext *pb = s->pb;
    int64_t pos;
    int mpeg = sc->track_type == 4 || sc->track_type == 9;

    /* track description section */
    put_byte(pb, sc->media_type + 0x80);
    put_byte(pb, index + 0xC0);

    pos = url_ftell(pb);
    put_be16(pb, 0); /* size */

    /* media file name */
    put_byte(pb, TRACK_NAME);
    put_byte(pb, strlen(ES_NAME_PATTERN) + 3);
    put_tag(pb, ES_NAME_PATTERN);
    put_be16(pb, sc->media_info);
    put_byte(pb, 0);

    if (!mpeg) {
        /* auxiliary information */
        put_byte(pb, TRACK_AUX);
        put_byte(pb, 8);
        if (sc->track_type == 3)
            gxf_write_timecode_auxiliary(pb, sc);
        else
            put_le64(pb, 0);
    }

    /* file system version */
    put_byte(pb, TRACK_VER);
    put_byte(pb, 4);
    put_be32(pb, 0);

    if (mpeg)
        gxf_write_mpeg_auxiliary(pb, s->streams[index]);

    /* frame rate */
    put_byte(pb, TRACK_FPS);
    put_byte(pb, 4);
    put_be32(pb, sc->frame_rate_index);

    /* lines per frame */
    put_byte(pb, TRACK_LINES);
    put_byte(pb, 4);
    put_be32(pb, sc->lines_index);

    /* fields per frame */
    put_byte(pb, TRACK_FPF);
    put_byte(pb, 4);
    put_be32(pb, sc->fields);

    return updateSize(pb, pos);
}

static int gxf_write_track_description(ByteIOContext *pb, GXFStreamContext *stream)
{
    int64_t pos;

    /* track description section */
    put_byte(pb, stream->media_type + 0x80);
    put_byte(pb, stream->index + 0xC0);

    pos = url_ftell(pb);
    put_be16(pb, 0); /* size */

    /* media file name */
    put_byte(pb, TRACK_NAME);
    put_byte(pb, strlen(ES_NAME_PATTERN) + 3);
    put_tag(pb, ES_NAME_PATTERN);
    put_be16(pb, stream->media_info);
    put_byte(pb, 0);

    if (stream->codec->codec_id != CODEC_ID_MPEG2VIDEO) {
        /* auxiliary information */
        put_byte(pb, TRACK_AUX);
        put_byte(pb, 8);
        if (stream->codec->codec_id == CODEC_ID_NONE)
            gxf_write_timecode_auxiliary(pb, stream);
        else
            put_le64(pb, 0);
    }

    /* file system version */
    put_byte(pb, TRACK_VER);
    put_byte(pb, 4);
    put_be32(pb, 0);

    if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO)
        gxf_write_mpeg_auxiliary(pb, stream);

    /* frame rate */
    put_byte(pb, TRACK_FPS);
    put_byte(pb, 4);
    put_be32(pb, stream->frame_rate_index);

    /* lines per frame */
    put_byte(pb, TRACK_LINES);
    put_byte(pb, 4);
    put_be32(pb, stream->lines_index);

    /* fields per frame */
    put_byte(pb, TRACK_FPF);
    put_byte(pb, 4);
    put_be32(pb, stream->fields);

    return updateSize(pb, pos);
}

/* AUDIO_FILE header */
static int put_au_header(ByteIOContext *pb, AVCodecContext *enc)
{
    if(!enc->codec_tag)
        return -1;
    put_tag(pb, ".snd");       /* magic number */
    put_be32(pb, 24);           /* header size */
    put_be32(pb, AU_UNKNOWN_SIZE); /* data size */
    put_be32(pb, (uint32_t)enc->codec_tag);     /* codec ID */
    put_be32(pb, enc->sample_rate);
    put_be32(pb, (uint32_t)enc->channels);
    return 0;
}

AM_ERR CMp4Builder::put_FileTypeBox()
{
  PRINT_FUNCTION_NAME;

  AM_ENSURE_OK_(put_be32(FileTypeBox_SIZE)); //uint32 size
  AM_ENSURE_OK_(put_boxtype("ftyp"));
  AM_ENSURE_OK_(put_boxtype("mp42"));        //uint32 major_brand
  AM_ENSURE_OK_(put_be32(0));                //uint32 minor_version
  AM_ENSURE_OK_(put_boxtype("mp42"));        //uint32 compatible_brands[]
  AM_ENSURE_OK_(put_boxtype("isom"));

  return ME_OK;
}

static int mmf_write_header(AVFormatContext *s)
{
    MMFContext *mmf = s->priv_data;
    ByteIOContext *pb = s->pb;
    int64_t pos;
    int rate;

    rate = mmf_rate_code(s->streams[0]->codec->sample_rate);
    if(rate < 0) {
        av_log(s, AV_LOG_ERROR, "Unsupported sample rate %d\n", s->streams[0]->codec->sample_rate);
        return -1;
    }

    put_tag(pb, "MMMD");
    put_be32(pb, 0);
    pos = ff_start_tag(pb, "CNTI");
    put_byte(pb, 0); /* class */
    put_byte(pb, 0); /* type */
    put_byte(pb, 0); /* code type */
    put_byte(pb, 0); /* status */
    put_byte(pb, 0); /* counts */
    put_tag(pb, "VN:libavcodec,"); /* metadata ("ST:songtitle,VN:version,...") */
    end_tag_be(pb, pos);

    put_buffer(pb, "ATR\x00", 4);
    put_be32(pb, 0);
    mmf->atrpos = url_ftell(pb);
    put_byte(pb, 0); /* format type */
    put_byte(pb, 0); /* sequence type */
    put_byte(pb, (0 << 7) | (1 << 4) | rate); /* (channel << 7) | (format << 4) | rate */
    put_byte(pb, 0); /* wave base bit */
    put_byte(pb, 2); /* time base d */
    put_byte(pb, 2); /* time base g */

    put_tag(pb, "Atsq");
    put_be32(pb, 16);
    mmf->atsqpos = url_ftell(pb);
    /* Will be filled on close */
    put_buffer(pb, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16);

    mmf->awapos = ff_start_tag(pb, "Awa\x01");

    av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);

    put_flush_packet(pb);

    return 0;
}

 void
 RTMPSession::sendSetChunkSize(int32_t chunkSize)
 {
     
     m_jobQueue.enqueue([&, chunkSize] {
         
         int streamId = 0;
         
         std::vector<uint8_t> buff;
         
         put_byte(buff, 2); // chunk stream ID 2
         put_be24(buff, 0); // ts
         put_be24(buff, 4); // size (4 bytes)
         put_byte(buff, RTMP_PT_CHUNK_SIZE); // chunk type
         
         put_buff(buff, (uint8_t*)&streamId, sizeof(int32_t)); // msg stream id is little-endian
         
         put_be32(buff, chunkSize);
         
         write(&buff[0], buff.size());
         
         m_outChunkSize = chunkSize;
     });
     
 }

static void *generate_fake_oid(const void *old, size_t *len)
{
	static uint32_t counter = 1; /* avoid null sha1 */
	unsigned char *out = xcalloc(GIT_SHA1_RAWSZ, 1);
	put_be32(out + GIT_SHA1_RAWSZ - 4, counter++);
	return out;
}

static void *generate_fake_sha1(const void *old, size_t *len)
{
	static uint32_t counter = 1; /* avoid null sha1 */
	unsigned char *out = xcalloc(20, 1);
	put_be32(out + 16, counter++);
	return out;
}