diff options
Diffstat (limited to 'ffmpeg1/libavformat/rtpenc_h263_rfc2190.c')
| -rw-r--r-- | ffmpeg1/libavformat/rtpenc_h263_rfc2190.c | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/ffmpeg1/libavformat/rtpenc_h263_rfc2190.c b/ffmpeg1/libavformat/rtpenc_h263_rfc2190.c deleted file mode 100644 index f714d01..0000000 --- a/ffmpeg1/libavformat/rtpenc_h263_rfc2190.c +++ /dev/null @@ -1,195 +0,0 @@ -/* - * RTP packetization for H.263 video - * Copyright (c) 2012 Martin Storsjo - * - * This file is part of Libav. - * - * Libav 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 2.1 of the License, or (at your option) any later version. - * - * Libav 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 Libav; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "avformat.h" -#include "rtpenc.h" -#include "libavcodec/put_bits.h" -#include "libavcodec/get_bits.h" - -struct H263Info { - int src; - int i; - int u; - int s; - int a; - int pb; - int tr; -}; - -struct H263State { - int gobn; - int mba; - int hmv1, vmv1, hmv2, vmv2; - int quant; -}; - -static void send_mode_a(AVFormatContext *s1, const struct H263Info *info, - const uint8_t *buf, int len, int ebits, int m) -{ - RTPMuxContext *s = s1->priv_data; - PutBitContext pb; - - init_put_bits(&pb, s->buf, 32); - put_bits(&pb, 1, 0); /* F - 0, mode A */ - put_bits(&pb, 1, 0); /* P - 0, normal I/P */ - put_bits(&pb, 3, 0); /* SBIT - 0 bits */ - put_bits(&pb, 3, ebits); /* EBIT */ - put_bits(&pb, 3, info->src); /* SRC - source format */ - put_bits(&pb, 1, info->i); /* I - inter/intra */ - put_bits(&pb, 1, info->u); /* U - unrestricted motion vector */ - put_bits(&pb, 1, info->s); /* S - syntax-baesd arithmetic coding */ - put_bits(&pb, 1, info->a); /* A - advanced prediction */ - put_bits(&pb, 4, 0); /* R - reserved */ - put_bits(&pb, 2, 0); /* DBQ - 0 */ - put_bits(&pb, 3, 0); /* TRB - 0 */ - put_bits(&pb, 8, info->tr); /* TR */ - flush_put_bits(&pb); - memcpy(s->buf + 4, buf, len); - - ff_rtp_send_data(s1, s->buf, len + 4, m); -} - -static void send_mode_b(AVFormatContext *s1, const struct H263Info *info, - const struct H263State *state, const uint8_t *buf, - int len, int sbits, int ebits, int m) -{ - RTPMuxContext *s = s1->priv_data; - PutBitContext pb; - - init_put_bits(&pb, s->buf, 64); - put_bits(&pb, 1, 1); /* F - 1, mode B */ - put_bits(&pb, 1, 0); /* P - 0, mode B */ - put_bits(&pb, 3, sbits); /* SBIT - 0 bits */ - put_bits(&pb, 3, ebits); /* EBIT - 0 bits */ - put_bits(&pb, 3, info->src); /* SRC - source format */ - put_bits(&pb, 5, state->quant); /* QUANT - quantizer for the first MB */ - put_bits(&pb, 5, state->gobn); /* GOBN - GOB number */ - put_bits(&pb, 9, state->mba); /* MBA - MB address */ - put_bits(&pb, 2, 0); /* R - reserved */ - put_bits(&pb, 1, info->i); /* I - inter/intra */ - put_bits(&pb, 1, info->u); /* U - unrestricted motion vector */ - put_bits(&pb, 1, info->s); /* S - syntax-baesd arithmetic coding */ - put_bits(&pb, 1, info->a); /* A - advanced prediction */ - put_bits(&pb, 7, state->hmv1); /* HVM1 - horizontal motion vector 1 */ - put_bits(&pb, 7, state->vmv1); /* VMV1 - vertical motion vector 1 */ - put_bits(&pb, 7, state->hmv2); /* HVM2 - horizontal motion vector 2 */ - put_bits(&pb, 7, state->vmv2); /* VMV2 - vertical motion vector 2 */ - flush_put_bits(&pb); - memcpy(s->buf + 8, buf, len); - - ff_rtp_send_data(s1, s->buf, len + 8, m); -} - -void ff_rtp_send_h263_rfc2190(AVFormatContext *s1, const uint8_t *buf, int size, - const uint8_t *mb_info, int mb_info_size) -{ - RTPMuxContext *s = s1->priv_data; - int len, sbits = 0, ebits = 0; - GetBitContext gb; - struct H263Info info = { 0 }; - struct H263State state = { 0 }; - int mb_info_pos = 0, mb_info_count = mb_info_size / 12; - const uint8_t *buf_base = buf; - - s->timestamp = s->cur_timestamp; - - init_get_bits(&gb, buf, size*8); - if (get_bits(&gb, 22) == 0x20) { /* Picture Start Code */ - info.tr = get_bits(&gb, 8); - skip_bits(&gb, 2); /* PTYPE start, H261 disambiguation */ - skip_bits(&gb, 3); /* Split screen, document camera, freeze picture release */ - info.src = get_bits(&gb, 3); - info.i = get_bits(&gb, 1); - info.u = get_bits(&gb, 1); - info.s = get_bits(&gb, 1); - info.a = get_bits(&gb, 1); - info.pb = get_bits(&gb, 1); - } - - while (size > 0) { - struct H263State packet_start_state = state; - len = FFMIN(s->max_payload_size - 8, size); - - /* Look for a better place to split the frame into packets. */ - if (len < size) { - const uint8_t *end = ff_h263_find_resync_marker_reverse(buf, - buf + len); - len = end - buf; - if (len == s->max_payload_size - 8) { - /* Skip mb info prior to the start of the current ptr */ - while (mb_info_pos < mb_info_count) { - uint32_t pos = AV_RL32(&mb_info[12*mb_info_pos])/8; - if (pos >= buf - buf_base) - break; - mb_info_pos++; - } - /* Find the first mb info past the end pointer */ - while (mb_info_pos + 1 < mb_info_count) { - uint32_t pos = AV_RL32(&mb_info[12*(mb_info_pos + 1)])/8; - if (pos >= end - buf_base) - break; - mb_info_pos++; - } - if (mb_info_pos < mb_info_count) { - const uint8_t *ptr = &mb_info[12*mb_info_pos]; - uint32_t bit_pos = AV_RL32(ptr); - uint32_t pos = (bit_pos + 7)/8; - if (pos <= end - buf_base) { - state.quant = ptr[4]; - state.gobn = ptr[5]; - state.mba = AV_RL16(&ptr[6]); - state.hmv1 = (int8_t) ptr[8]; - state.vmv1 = (int8_t) ptr[9]; - state.hmv2 = (int8_t) ptr[10]; - state.vmv2 = (int8_t) ptr[11]; - ebits = 8 * pos - bit_pos; - len = pos - (buf - buf_base); - mb_info_pos++; - } else { - av_log(s1, AV_LOG_ERROR, - "Unable to split H263 packet, use -mb_info %d " - "or lower.\n", s->max_payload_size - 8); - } - } else { - av_log(s1, AV_LOG_ERROR, "Unable to split H263 packet, " - "use -mb_info %d or -ps 1.\n", - s->max_payload_size - 8); - } - } - } - - if (size > 2 && !buf[0] && !buf[1]) - send_mode_a(s1, &info, buf, len, ebits, len == size); - else - send_mode_b(s1, &info, &packet_start_state, buf, len, sbits, - ebits, len == size); - - if (ebits) { - sbits = 8 - ebits; - len--; - } else { - sbits = 0; - } - buf += len; - size -= len; - ebits = 0; - } -} |