split asf patch by (Konstantin Andreyev <kandreyev at bcsii dot com>)

Originally committed as revision 2850 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 540 insertions, 0 deletions

diff --git a/libavformat/asf-enc.c b/libavformat/asf-enc.c
new file mode 100644
index 0000000000..9df604bf8c
--- /dev/null
+++ b/libavformat/asf-enc.c
@@ -0,0 +1,540 @@
+/*
+ * Adaptive stream format encoder
+ * Copyright (c) 2000, 2001 Fabrice Bellard.
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include "avformat.h"
+#include "avi.h"
+#include "asf.h"
+
+#undef NDEBUG
+#include <assert.h>
+
+#ifdef CONFIG_ENCODERS
+static void put_guid(ByteIOContext *s, const GUID *g)
+{
+    int i;
+
+    put_le32(s, g->v1);
+    put_le16(s, g->v2);
+    put_le16(s, g->v3);
+    for(i=0;i<8;i++)
+        put_byte(s, g->v4[i]);
+}
+
+static void put_str16(ByteIOContext *s, const char *tag)
+{
+    int c;
+
+    put_le16(s,strlen(tag) + 1);
+    for(;;) {
+        c = (uint8_t)*tag++;
+        put_le16(s, c);
+        if (c == '\0')
+            break;
+    }
+}
+
+static void put_str16_nolen(ByteIOContext *s, const char *tag)
+{
+    int c;
+
+    for(;;) {
+        c = (uint8_t)*tag++;
+        put_le16(s, c);
+        if (c == '\0')
+            break;
+    }
+}
+
+static int64_t put_header(ByteIOContext *pb, const GUID *g)
+{
+    int64_t pos;
+
+    pos = url_ftell(pb);
+    put_guid(pb, g);
+    put_le64(pb, 24);
+    return pos;
+}
+
+/* update header size */
+static void end_header(ByteIOContext *pb, int64_t pos)
+{
+    int64_t pos1;
+
+    pos1 = url_ftell(pb);
+    url_fseek(pb, pos + 16, SEEK_SET);
+    put_le64(pb, pos1 - pos);
+    url_fseek(pb, pos1, SEEK_SET);
+}
+
+/* write an asf chunk (only used in streaming case) */
+static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
+{
+    ASFContext *asf = s->priv_data;
+    ByteIOContext *pb = &s->pb;
+    int length;
+
+    length = payload_length + 8;
+    put_le16(pb, type);
+    put_le16(pb, length);
+    put_le32(pb, asf->seqno);
+    put_le16(pb, flags); /* unknown bytes */
+    put_le16(pb, length);
+    asf->seqno++;
+}
+
+/* convert from unix to windows time */
+static int64_t unix_to_file_time(int ti)
+{
+    int64_t t;
+
+    t = ti * int64_t_C(10000000);
+    t += int64_t_C(116444736000000000);
+    return t;
+}
+
+/* write the header (used two times if non streamed) */
+static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
+{
+    ASFContext *asf = s->priv_data;
+    ByteIOContext *pb = &s->pb;
+    int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
+    int has_title;
+    AVCodecContext *enc;
+    int64_t header_offset, cur_pos, hpos;
+    int bit_rate;
+
+    has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
+
+    bit_rate = 0;
+    for(n=0;n<s->nb_streams;n++) {
+        enc = &s->streams[n]->codec;
+
+        bit_rate += enc->bit_rate;
+    }
+
+    if (asf->is_streamed) {
+        put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
+    }
+
+    put_guid(pb, &asf_header);
+    put_le64(pb, -1); /* header length, will be patched after */
+    put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */
+    put_byte(pb, 1); /* ??? */
+    put_byte(pb, 2); /* ??? */
+
+    /* file header */
+    header_offset = url_ftell(pb);
+    hpos = put_header(pb, &file_header);
+    put_guid(pb, &my_guid);
+    put_le64(pb, file_size);
+    file_time = 0;
+    put_le64(pb, unix_to_file_time(file_time));
+    put_le64(pb, asf->nb_packets); /* number of packets */
+    put_le64(pb, asf->duration); /* end time stamp (in 100ns units) */
+    put_le64(pb, asf->duration); /* duration (in 100ns units) */
+    put_le32(pb, 0); /* start time stamp */
+    put_le32(pb, 0); /* ??? */
+    put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
+    put_le32(pb, asf->packet_size); /* packet size */
+    put_le32(pb, asf->packet_size); /* packet size */
+    put_le32(pb, bit_rate); /* Nominal data rate in bps */
+    end_header(pb, hpos);
+
+    /* unknown headers */
+    hpos = put_header(pb, &head1_guid);
+    put_guid(pb, &head2_guid);
+    put_le32(pb, 6);
+    put_le16(pb, 0);
+    end_header(pb, hpos);
+
+    /* title and other infos */
+    if (has_title) {
+        hpos = put_header(pb, &comment_header);
+        put_le16(pb, 2 * (strlen(s->title) + 1));
+        put_le16(pb, 2 * (strlen(s->author) + 1));
+        put_le16(pb, 2 * (strlen(s->copyright) + 1));
+        put_le16(pb, 2 * (strlen(s->comment) + 1));
+        put_le16(pb, 0);
+        put_str16_nolen(pb, s->title);
+        put_str16_nolen(pb, s->author);
+        put_str16_nolen(pb, s->copyright);
+        put_str16_nolen(pb, s->comment);
+        end_header(pb, hpos);
+    }
+
+    /* stream headers */
+    for(n=0;n<s->nb_streams;n++) {
+        int64_t es_pos;
+        //        ASFStream *stream = &asf->streams[n];
+
+        enc = &s->streams[n]->codec;
+        asf->streams[n].num = n + 1;
+        asf->streams[n].seq = 0;
+
+        switch(enc->codec_type) {
+        case CODEC_TYPE_AUDIO:
+            wav_extra_size = 0;
+            extra_size = 18 + wav_extra_size;
+            extra_size2 = 0;
+            break;
+        default:
+        case CODEC_TYPE_VIDEO:
+            wav_extra_size = 0;
+            extra_size = 0x33;
+            extra_size2 = 0;
+            break;
+        }
+
+        hpos = put_header(pb, &stream_header);
+        if (enc->codec_type == CODEC_TYPE_AUDIO) {
+            put_guid(pb, &audio_stream);
+            put_guid(pb, &audio_conceal_none);
+        } else {
+            put_guid(pb, &video_stream);
+            put_guid(pb, &video_conceal_none);
+        }
+        put_le64(pb, 0); /* ??? */
+        es_pos = url_ftell(pb);
+        put_le32(pb, extra_size); /* wav header len */
+        put_le32(pb, extra_size2); /* additional data len */
+        put_le16(pb, n + 1); /* stream number */
+        put_le32(pb, 0); /* ??? */
+
+        if (enc->codec_type == CODEC_TYPE_AUDIO) {
+            /* WAVEFORMATEX header */
+            int wavsize = put_wav_header(pb, enc);
+
+            if (wavsize < 0)
+                return -1;
+            if (wavsize != extra_size) {
+                cur_pos = url_ftell(pb);
+                url_fseek(pb, es_pos, SEEK_SET);
+                put_le32(pb, wavsize); /* wav header len */
+                url_fseek(pb, cur_pos, SEEK_SET);
+            }
+        } else {
+            put_le32(pb, enc->width);
+            put_le32(pb, enc->height);
+            put_byte(pb, 2); /* ??? */
+            put_le16(pb, 40); /* size */
+
+            /* BITMAPINFOHEADER header */
+            put_bmp_header(pb, enc, codec_bmp_tags, 1);
+        }
+        end_header(pb, hpos);
+    }
+
+    /* media comments */
+
+    hpos = put_header(pb, &codec_comment_header);
+    put_guid(pb, &codec_comment1_header);
+    put_le32(pb, s->nb_streams);
+    for(n=0;n<s->nb_streams;n++) {
+        AVCodec *p;
+
+        enc = &s->streams[n]->codec;
+        p = avcodec_find_encoder(enc->codec_id);
+
+        put_le16(pb, asf->streams[n].num);
+        put_str16(pb, p ? p->name : enc->codec_name);
+        put_le16(pb, 0); /* no parameters */
+        
+        
+        /* id */
+        if (enc->codec_type == CODEC_TYPE_AUDIO) {
+            put_le16(pb, 2);
+            if(!enc->codec_tag)
+                enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
+            if(!enc->codec_tag)
+                return -1;
+            put_le16(pb, enc->codec_tag);
+        } else {
+            put_le16(pb, 4);
+            if(!enc->codec_tag)
+                enc->codec_tag = codec_get_tag(codec_bmp_tags, enc->codec_id);
+            if(!enc->codec_tag)
+                return -1;
+            put_le32(pb, enc->codec_tag);
+        }
+    }
+    end_header(pb, hpos);
+
+    /* patch the header size fields */
+
+    cur_pos = url_ftell(pb);
+    header_size = cur_pos - header_offset;
+    if (asf->is_streamed) {
+        header_size += 8 + 30 + 50;
+
+        url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
+        put_le16(pb, header_size);
+        url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
+        put_le16(pb, header_size);
+
+        header_size -= 8 + 30 + 50;
+    }
+    header_size += 24 + 6;
+    url_fseek(pb, header_offset - 14, SEEK_SET);
+    put_le64(pb, header_size);
+    url_fseek(pb, cur_pos, SEEK_SET);
+
+    /* movie chunk, followed by packets of packet_size */
+    asf->data_offset = cur_pos;
+    put_guid(pb, &data_header);
+    put_le64(pb, data_chunk_size);
+    put_guid(pb, &my_guid);
+    put_le64(pb, asf->nb_packets); /* nb packets */
+    put_byte(pb, 1); /* ??? */
+    put_byte(pb, 1); /* ??? */
+    return 0;
+}
+
+static int asf_write_header(AVFormatContext *s)
+{
+    ASFContext *asf = s->priv_data;
+
+    av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
+
+    asf->packet_size = PACKET_SIZE;
+    asf->nb_packets = 0;
+
+    if (asf_write_header1(s, 0, 50) < 0) {
+        //av_free(asf);
+        return -1;
+    }
+
+    put_flush_packet(&s->pb);
+
+    asf->packet_nb_frames = 0;
+    asf->packet_timestamp_start = -1;
+    asf->packet_timestamp_end = -1;
+    asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
+    init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
+                  NULL, NULL, NULL, NULL);
+
+    return 0;
+}
+
+static int asf_write_stream_header(AVFormatContext *s)
+{
+    ASFContext *asf = s->priv_data;
+
+    asf->is_streamed = 1;
+
+    return asf_write_header(s);
+}
+
+/* write a fixed size packet */
+static int put_packet(AVFormatContext *s,
+                       unsigned int timestamp, unsigned int duration,
+                       int nb_frames, int padsize)
+{
+    ASFContext *asf = s->priv_data;
+    ByteIOContext *pb = &s->pb;
+    int flags;
+
+    if (asf->is_streamed) {
+        put_chunk(s, 0x4424, asf->packet_size, 0);
+    }
+
+    put_byte(pb, 0x82);
+    put_le16(pb, 0);
+
+    flags = 0x01; /* nb segments present */
+    if (padsize > 0) {
+        if (padsize < 256)
+            flags |= 0x08;
+        else
+            flags |= 0x10;
+    }
+    put_byte(pb, flags); /* flags */
+    put_byte(pb, 0x5d);
+    if (flags & 0x10)
+        put_le16(pb, padsize - 2);
+    if (flags & 0x08)
+        put_byte(pb, padsize - 1);
+    put_le32(pb, timestamp);
+    put_le16(pb, duration);
+    put_byte(pb, nb_frames | 0x80);
+
+    return PACKET_HEADER_SIZE + ((flags & 0x18) >> 3);
+}
+
+static void flush_packet(AVFormatContext *s)
+{
+    ASFContext *asf = s->priv_data;
+    int hdr_size, ptr;
+
+    hdr_size = put_packet(s, asf->packet_timestamp_start,
+               asf->packet_timestamp_end - asf->packet_timestamp_start,
+               asf->packet_nb_frames, asf->packet_size_left);
+
+    /* Clear out the padding bytes */
+    ptr = asf->packet_size - hdr_size - asf->packet_size_left;
+    memset(asf->packet_buf + ptr, 0, asf->packet_size_left);
+
+    put_buffer(&s->pb, asf->packet_buf, asf->packet_size - hdr_size);
+
+    put_flush_packet(&s->pb);
+    asf->nb_packets++;
+    asf->packet_nb_frames = 0;
+    asf->packet_timestamp_start = -1;
+    asf->packet_timestamp_end = -1;
+    asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
+    init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
+                  NULL, NULL, NULL, NULL);
+}
+
+static void put_frame_header(AVFormatContext *s, ASFStream *stream, int timestamp,
+                             int payload_size, int frag_offset, int frag_len)
+{
+    ASFContext *asf = s->priv_data;
+    ByteIOContext *pb = &asf->pb;
+    int val;
+
+    val = stream->num;
+    if (s->streams[val - 1]->codec.coded_frame->key_frame /* && frag_offset == 0 */)
+        val |= 0x80;
+    put_byte(pb, val);
+    put_byte(pb, stream->seq);
+    put_le32(pb, frag_offset); /* fragment offset */
+    put_byte(pb, 0x08); /* flags */
+    put_le32(pb, payload_size);
+    put_le32(pb, timestamp);
+    put_le16(pb, frag_len);
+}
+
+
+/* Output a frame. We suppose that payload_size <= PACKET_SIZE.
+
+   It is there that you understand that the ASF format is really
+   crap. They have misread the MPEG Systems spec !
+ */
+static void put_frame(AVFormatContext *s, ASFStream *stream, int timestamp,
+                      const uint8_t *buf, int payload_size)
+{
+    ASFContext *asf = s->priv_data;
+    int frag_pos, frag_len, frag_len1;
+
+    frag_pos = 0;
+    while (frag_pos < payload_size) {
+        frag_len = payload_size - frag_pos;
+        frag_len1 = asf->packet_size_left - FRAME_HEADER_SIZE;
+        if (frag_len1 > 0) {
+            if (frag_len > frag_len1)
+                frag_len = frag_len1;
+            put_frame_header(s, stream, timestamp+1, payload_size, frag_pos, frag_len);
+            put_buffer(&asf->pb, buf, frag_len);
+            asf->packet_size_left -= (frag_len + FRAME_HEADER_SIZE);
+            asf->packet_timestamp_end = timestamp;
+            if (asf->packet_timestamp_start == -1)
+                asf->packet_timestamp_start = timestamp;
+            asf->packet_nb_frames++;
+        } else {
+            frag_len = 0;
+        }
+        frag_pos += frag_len;
+        buf += frag_len;
+        /* output the frame if filled */
+        if (asf->packet_size_left <= FRAME_HEADER_SIZE)
+            flush_packet(s);
+    }
+    stream->seq++;
+}
+
+
+static int asf_write_packet(AVFormatContext *s, int stream_index,
+                            const uint8_t *buf, int size, int64_t timestamp)
+{
+    ASFContext *asf = s->priv_data;
+    ASFStream *stream;
+    int64_t duration;
+    AVCodecContext *codec;
+
+    codec = &s->streams[stream_index]->codec;
+    stream = &asf->streams[stream_index];
+
+    if (codec->codec_type == CODEC_TYPE_AUDIO) {
+        duration = (codec->frame_number * codec->frame_size * int64_t_C(10000000)) /
+            codec->sample_rate;
+    } else {
+        duration = av_rescale(codec->frame_number * codec->frame_rate_base, 10000000, codec->frame_rate);
+    }
+    if (duration > asf->duration)
+        asf->duration = duration;
+
+    put_frame(s, stream, timestamp, buf, size);
+    return 0;
+}
+
+static int asf_write_trailer(AVFormatContext *s)
+{
+    ASFContext *asf = s->priv_data;
+    int64_t file_size;
+
+    /* flush the current packet */
+    if (asf->pb.buf_ptr > asf->pb.buffer)
+        flush_packet(s);
+
+    if (asf->is_streamed) {
+        put_chunk(s, 0x4524, 0, 0); /* end of stream */
+    } else {
+        /* rewrite an updated header */
+        file_size = url_ftell(&s->pb);
+        url_fseek(&s->pb, 0, SEEK_SET);
+        asf_write_header1(s, file_size, file_size - asf->data_offset);
+    }
+
+    put_flush_packet(&s->pb);
+    return 0;
+}
+
+AVOutputFormat asf_oformat = {
+    "asf",
+    "asf format",
+    "video/x-ms-asf",
+    "asf,wmv",
+    sizeof(ASFContext),
+#ifdef CONFIG_MP3LAME
+    CODEC_ID_MP3,
+#else
+    CODEC_ID_MP2,
+#endif
+    CODEC_ID_MSMPEG4V3,
+    asf_write_header,
+    asf_write_packet,
+    asf_write_trailer,
+};
+
+AVOutputFormat asf_stream_oformat = {
+    "asf_stream",
+    "asf format",
+    "video/x-ms-asf",
+    "asf,wmv",
+    sizeof(ASFContext),
+#ifdef CONFIG_MP3LAME
+    CODEC_ID_MP3,
+#else
+    CODEC_ID_MP2,
+#endif
+    CODEC_ID_MSMPEG4V3,
+    asf_write_stream_header,
+    asf_write_packet,
+    asf_write_trailer,
+};
+#endif //CONFIG_ENCODERS