summaryrefslogtreecommitdiff
path: root/libavformat/asf-enc.c
diff options
context:
space:
mode:
Diffstat (limited to 'libavformat/asf-enc.c')
-rw-r--r--libavformat/asf-enc.c540
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
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-29 20:33:42 +0000